CN106786964A - Battery bag charge-discharge control circuit and power battery system of electric vehicle - Google Patents
Battery bag charge-discharge control circuit and power battery system of electric vehicle Download PDFInfo
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- CN106786964A CN106786964A CN201710029761.3A CN201710029761A CN106786964A CN 106786964 A CN106786964 A CN 106786964A CN 201710029761 A CN201710029761 A CN 201710029761A CN 106786964 A CN106786964 A CN 106786964A
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- battery bag
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- charge
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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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
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
-
- 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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
Abstract
The invention discloses a kind of battery bag charge-discharge control circuit and power battery system of electric vehicle.The control circuit includes：The discharge switching circuit for turned on when battery bag is discharged, being turned off when battery bag charges；The charge switch circuit for turned on when battery bag charges, being turned off when battery bag is discharged；Control module for controlling discharge switching circuit and the on off operating mode of charge switch circuit；First unidirectionally controlled circuit is in parallel with discharge switching circuit, and the sense of current via the first unidirectionally controlled circuit is opposite with the sense of current for flowing through discharge switching circuit；Second unidirectionally controlled circuit is in parallel with charge switch circuit, and the sense of current via the second unidirectionally controlled circuit is opposite with the sense of current for flowing through charge switch circuit.The battery bag charge-discharge control circuit and power battery system of electric vehicle that the present invention is provided include multiple battery bags, and electrokinetic cell can be avoided from self discharge problem is filled, and reduce the rate of decay of electrokinetic cell, lift vehicle service life.
Description
Technical field
Moved the present invention relates to power battery technology field, more particularly to a kind of battery bag charge-discharge control circuit and electric motor car
Power battery system.
Background technology
Electrokinetic cell refers to the battery that power is provided for transport facility, typically with respect to being portable electric appts
There is provided for the compact battery of energy, for example, electric automobile, electric train, electric bicycle, golf cart provide power
Battery.Difference according to cell reaction principle can be divided into lead-acid power accumulator, Ni-MH power cell, lithium-ion-power cell
Etc..
No matter which kind of electrokinetic cell is used, in order to lift the course continuation mileage of electric motor car, it will usually using multiple battery bag strings
The technology of connection, at present, electric automobile on the market, electrokinetic cell is mostly using first by multiple monocells encapsulation formation electricity in parallel
Chi Bao, the technical scheme for being then powered the series connection of multiple battery bags.This technical scheme when actually used, to battery bag
Reliability requirement it is very high, if a certain series connection node therein battery bag break down, whole power electric can be influenceed
The normal discharge and recharge of cell system, and in order to ensure the safety of whole electrokinetic cell system, can typically take halt system to work
Measure, thus can have a strong impact on the use of electric motor car, there is potential safety hazard.
In order to solve the above-mentioned technical problem, the Chinese patent of Patent No. 201420451575.0 discloses a kind of mixing and moves
Power car electrokinetic cell system, as shown in figure 1, including electrokinetic cell bag A and power parallel with one another in this battery system
Battery bag B, so as to when percentage of batteries breaks down, hybrid power passenger car can also normal work, and allow only to change in the middle part of its
Divide battery bag, reduce maintenance time, improve electrokinetic cell system reliability.But, multiple knots are used in this technical scheme
Structure and the consistent battery bag of parameter carry out parallel connection, in fact, two battery bags are extremely difficult to structure and parameter is completely the same, and
And, even if structure and two completely the same battery bags of parameter, in use for some time, also occur difference, and this difference
It is different to occur mutually discharging and then causing rush of current during battery bag parallel operation, cause the electrokinetic cell life-span
Rapid decay, and the life-span of electronic device declines to a great extent or damages.
When in sum, for batteries in parallel connection bag is used in electrokinetic cell system present in prior art, electrokinetic cell
The technical problem of short life, not yet proposes effective solution at present.
The content of the invention
It is an object of the invention to provide a kind of battery bag charge-discharge control circuit and power battery system of electric vehicle, to solve
When using batteries in parallel connection bag in electrokinetic cell system present in prior art, the technical problem of electrokinetic cell short life.
In one aspect, to achieve these goals, the invention provides a kind of battery bag charge-discharge control circuit.
The battery bag charge-discharge control circuit includes：Discharge switching circuit, for being turned on when battery bag is discharged, in battery
Turned off when bag charges；Charge switch circuit, for being turned on when battery bag charges, turns off when battery bag is discharged, wherein, electric discharge
On-off circuit is in series with charge switch circuit, and one end connection battery bag after concatenation, and the other end connects the negative of battery bag
Carry；Control module, is respectively connected with discharge switching circuit with charge switch circuit, for controlling discharge switching circuit and charging
The on off operating mode of on-off circuit；First unidirectionally controlled circuit, is in parallel with discharge switching circuit, via the first unidirectionally controlled circuit
Sense of current it is opposite with the sense of current for flowing through discharge switching circuit；Second unidirectionally controlled circuit, with charge switch circuit
It is in parallel, the sense of current via the second unidirectionally controlled circuit is opposite with the sense of current for flowing through charge switch circuit.
Further, battery bag include multiple be serially connected and/or parallel connection monocell.
Further, discharge switching circuit is managed with charge switch circuit including MOSFET；And control module includes control
Device processed and the MOSFET pipe drive modules being respectively connected with controller and MOSFET pipes.
Further, controller is provided with CAN communication interface, and CAN communication interface is used to receive and dispatch control electric discharge
The message information of the on off operating mode of on-off circuit and charge switch circuit.
Further, the first unidirectionally controlled circuit and the second unidirectionally controlled circuit include diode, and first is unidirectionally controlled
The diode of circuit is opposite with the conducting direction of the diode of the second unidirectionally controlled circuit.
In another aspect, to achieve these goals, the invention provides a kind of power battery system of electric vehicle.
The power battery system of electric vehicle includes：Multiple battery bags parallel with one another, each battery bag includes multiple mutual
Series connection and/or the monocell of parallel connection；Multiple control circuit, each control circuit is in series with a battery bag, each control electricity
Road is used to control a charging and discharging state for battery bag, and controls any one battery bag discharge and recharge that circuit provides for the application
Control circuit；Multiple collectors, each collector is used to gather a running parameter for battery bag；And control unit, control
Unit is respectively connected with multiple control circuit and multiple collectors.
Further, control unit includes：Electrokinetic cell controller, with multiple control circuit, multiple collectors and vehicle
Controller is respectively connected with, and the running parameter for being gathered according to collector is monitored and fault diagnosis to each battery bag,
And the fault diagnosis result of the control instruction according to entire car controller and each battery bag, the control electricity connected to each battery bag
Road sends charge and discharge control signal；Load controller, is connected with entire car controller, refers to for the control according to entire car controller
Order control load running；And entire car controller, for managing and dispatching vehicle electric discharge and charge, to electrokinetic cell controller and
Load controller sends control instruction.
Further, electrokinetic cell controller, load controller and entire car controller are respectively provided with CAN communication and connect
Mouthful.
Further, collector includes：Voltage sampling circuit；Current sampling circuit；Temperature sampling circuit；With current sample
The first signal processing circuit that circuit is connected；The secondary signal process circuit being connected with temperature sampling circuit；Adopted with voltage
The ADC converters that sample circuit, the first signal processing circuit and secondary signal process circuit are respectively connected with；And with ADC converters
The microprocessor being connected, wherein, microprocessor is provided with to be adopted for the voltage signal that samples voltage sampling circuit, electric current
Sample circuit sampling to current signal and the temperature signal that samples of temperature sampling circuit send to the CAN of electrokinetic cell controller
Bus communication interface.
Further, current sampling circuit includes current divider；Temperature sampling circuit includes thermistor.
The present invention is by a kind of battery bag charge-discharge control circuit and the power battery of electric vehicle system with the control circuit
System, realizes forming electrokinetic cell by the way of multiple battery bags are connected in parallel in electrokinetic cell system, in any one battery
When bag goes wrong, by battery bag isolation, it is to avoid cause the burst event of parking because certain battery bag goes wrong
Barrier, can well eliminate the potential safety hazard of burst lay-by, and consumer is for the good experience that electric motor car drives, battery for enhancing
Bag charge-discharge control circuit includes discharge switching circuit, charge switch circuit, control module, the first unidirectionally controlled circuit and second
Unidirectionally controlled circuit is, it is necessary to when battery bag is isolated, control module control discharge switching circuit and charge switch circuit are in closing
Disconnected state；In discharge process, control module control discharge switching circuit is in the conduction state, and control charge switch circuit is in
Off state, now, electric current by battery bag flow direction load realize electric discharge, and due to charge switch circuit be off state and
And second unidirectionally controlled circuit one-way conduction function, be not in circulation that the mutual discharge and recharge of each battery bag causes；Filling
In electric process, control module control discharge switching circuit is off state, and control charge switch circuit is in the conduction state, this
When, electric current flows to battery bag realization charging by loading, and because discharge switching circuit is off state and the first unidirectional control
The one-way conduction function of circuit processed, is not in circulation that the mutual discharge and recharge of each battery bag causes, thus, it is possible to be prevented effectively from
Electrokinetic cell reduces the rate of decay of electrokinetic cell from self discharge problem is filled, and lifts vehicle service life.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, not
Constitute limitation of the invention.In the accompanying drawings：
Fig. 1 is the system architecture diagram of electrokinetic cell system in the prior art；
The structured flowchart of the battery bag charge-discharge control circuit that Fig. 2 is provided for the application first embodiment；
The circuit theory diagrams of the battery bag charge-discharge control circuit that Fig. 3 is provided for the application second embodiment；
The structured flowchart of the power battery system of electric vehicle that Fig. 4 is provided for the application 3rd embodiment；
The structured flowchart of the power battery system of electric vehicle that Fig. 5 is provided for the application fourth embodiment.
Specific embodiment
It is right with reference to implementation method and accompanying drawing to make the object, technical solutions and advantages of the present invention become more apparent
The present invention is described in further details.Here, exemplary embodiment of the invention and its illustrating for explaining the present invention, but simultaneously
It is not as a limitation of the invention.
In each embodiment of the invention, form dynamic by the way of multiple battery bags are connected in parallel in electrokinetic cell system
Power battery, so as to when certain sys node breaks down, the battery bag for belonging to this node can exit supply network, with normal battery
Bag isolation, it is to avoid influence the use of the battery bag of other nodes, strengthens electrokinetic cell system robustness.
On this basis, the charge and discharge process of battery bag is entered using battery bag charge-discharge control circuit proposed by the present invention
Row control, it is relatively low to the coherence request between each battery bag, even if to there is structure, parameter etc. inconsistent for each battery bag
Situation, be also not in each battery bag each other from the problem of self discharge is filled, no matter in charging direction or course of discharge,
Each battery bag does not interfere with each other, realizes that charging and discharging is unidirectionally controlled, solve in the prior art electrokinetic cell due to filling certainly
Self discharge problem and cause the technical problem of electrokinetic cell life-span rapid decay.
In sum, each embodiment of the invention is provided battery bag charge-discharge control circuit and power battery of electric vehicle system
System can either strengthen the fault-tolerant ability of electrokinetic cell system, and when certain battery bag in electrokinetic cell breaks down, system is still
Can normally for vehicle is powered, and in electrokinetic cell battery bag uniformity requirement reduction, and electrokinetic cell the use longevity
Life length.
Main thought with the above as present inventive concept, each embodiment for describing present invention offer in detail is as follows.
First embodiment
The structured flowchart of the battery bag charge-discharge control circuit that Fig. 2 is provided for the application first embodiment, the embodiment is carried
The battery bag charge-discharge control circuit of confession is applied in power battery system of electric vehicle, a battery bag charge-discharge control circuit pair
The discharge and recharge of a battery bag in the electrokinetic cell system with multiple batteries in parallel connection bags is controlled, specifically, such as Fig. 2 institutes
Show, the battery bag charge-discharge control circuit includes that discharge switching circuit 11, charge switch circuit 12, control module 13, first are single
To the control unidirectionally controlled circuit 15 of circuit 14 and second.
Discharge switching circuit 11 is used to be turned on when battery bag is discharged, and is turned off when battery bag charges；Charge switch circuit
12 are used to be turned on when battery bag charges, and are turned off when battery bag is discharged；Via the side of the electric current of the first unidirectionally controlled circuit 14
To opposite with the sense of current for flowing through discharge switching circuit 11；Sense of current via the second unidirectionally controlled circuit 15 with flow through
The sense of current of charge switch circuit 12 is opposite；Control module 13 is used to control the discharge switching circuit with the charge switch
The on off operating mode of circuit.Wherein, those skilled in the art can be based on the known normal of this area when each circuit and module is realized
Know and conventional techniques realize corresponding function using relative electronic components connection.
Discharge switching circuit 11 is in series with charge switch circuit 12, and one end connection battery bag after concatenation, another
The load of end connection battery bag, the first unidirectionally controlled circuit 14 is in parallel with discharge switching circuit 11, the second unidirectionally controlled circuit
15 are in parallel with charge switch circuit 12.
Control module 13 is externally connected with the master control part in electrokinetic cell system, internally with discharge switching circuit 11 and
Charge switch circuit 12 is respectively connected with.The control that master control part in the reception electrokinetic cell system of control module 13 issues refers to
Order, whether the battery bag that the battery bag charge-discharge control circuit that the control instruction is used for where indicating the control module 13 is controlled
Discharge and recharge and charging and discharging state are participated in, control module 13 parses the control instruction for receiving and controls discharge switching circuit 11 and fill
The on off operating mode of electric switch circuit 12.
When the parsing of control module 13 control instruction obtains the battery bag and need not participate in the information of discharge and recharge, such as battery
Bag breaks down, or the current working condition of electric motor car participates in discharge and recharge without the battery bag, or other electric motor cars need not
The battery bag participates in the situation of discharge and recharge, and the control discharge switching circuit 11 of control module 13 and charge switch circuit 12 are in closing
Disconnected state.Now, between battery bag and load, battery bag charge-discharge control circuit is in the state for disconnecting, equivalent to the electricity
Pond guarantee for returns goes out electrokinetic cell system.
When the parsing of control module 13 control instruction obtains the information that battery bag needs are discharged, for example, electric motor car
Driving condition is currently at, the control discharge switching circuit 11 of control module 13 is in the conduction state, controls charge switch circuit 12
It is off state.Now, discharge switching circuit 11, the second unidirectionally controlled circuit 15, battery bag and load forms loop, electric current
Flowed to by battery bag and loaded, realize electric discharge.Meanwhile, in opposite direction, because charge switch circuit 12 is off state and
The one-way conduction function of two unidirectionally controlled circuits 15, is not in circulation that the mutual discharge and recharge of each battery bag causes, thus keep away
The problem that the charging of certain battery bag occurs in discharge process in electrokinetic cell is exempted from.
When the parsing of control module 13 control instruction obtains the information that battery bag needs are charged, for example, electric motor car
On-position is currently at, the control discharge switching circuit 11 of control module 13 is off state, controls charge switch circuit 12
It is in the conduction state.Now, charge switch circuit 12, the first unidirectionally controlled circuit 14, battery bag and load forms loop, electric current
Battery bag is flowed to by load, realizes charging.Meanwhile, in opposite direction, because discharge switching circuit 11 is off state and
The one-way conduction function of one unidirectionally controlled circuit 14, is not in circulation that the mutual discharge and recharge of each battery bag causes, thus keep away
The problem that the electric discharge of certain battery bag occurs in charging process in electrokinetic cell is exempted from.
The battery bag charge-discharge control circuit provided using the embodiment, is applied to have the electronic of multiple batteries in parallel connection bags
Also be not in that electrokinetic cell fills certainly even if each batteries in parallel connection pack arrangement, parameter etc. are inconsistent when in car electrokinetic cell system
The problem of self discharge, reduces the rate of decay of electrokinetic cell, lifts vehicle service life.
Wherein, when battery bag is formed, can be serially connected using multiple monocells according to the actually used situation of electric motor car,
Parallel with one another or series connection is formed with the mode for mixing in parallel, and each monocell can be similar battery, or inhomogeneity electricity
Pond etc., the generation type in the application to battery bag is not limited.Preferably, in order that electrokinetic cell whole volume it is larger and
Easily replace, repair and manage, battery bag is formed using similar capacity identical cells in series.
Wherein, in the first embodiment, discharge switching circuit 11 and charge switch circuit can be realized by MOSFET pipes
12 conducting and shut-off, control module 13 include that controller and the MOSFET pipes being respectively connected with controller and MOSFET pipes drive
Dynamic model block, from controller to MOSFET pipe drive module sending signals, drives the conducting and shut-off of MOSFET pipes.Or in electric discharge
Other switching tubes, such as large power triode etc. are used in on-off circuit 11 and charge switch circuit 12.Further, controller
CAN communication interface is provided with, CAN communication interface is used to receive control discharge switching circuit with charge switch circuit
The message information of on off operating mode, for example, receive message information that the master control part in electrokinetic cell system issues etc..
Wherein, diode, the first unidirectional control are included in the first unidirectionally controlled circuit 14 and the second unidirectionally controlled circuit 15
The conducting direction of the diode of the diode of circuit processed 14 and the second unidirectionally controlled circuit 15 is conversely, so as in charging and discharging mistake
Cheng Zhong, battery bag charge-discharge control circuit only can be with one-way conduction.
Second embodiment
The circuit theory diagrams of the battery bag charge-discharge control circuit that Fig. 3 is provided for the application second embodiment, the embodiment
The battery bag charge-discharge control circuit of offer is applied in power battery system of electric vehicle, a battery bag charge-discharge control circuit
Discharge and recharge to a battery bag in the electrokinetic cell system with multiple batteries in parallel connection bags is controlled, specifically, such as Fig. 3
Shown, the battery bag charge-discharge control circuit includes MCU, MOSFET drive module, a MOSFET pipes M1, the 2nd MOSFET pipes
M2, the first diode D1 and the second diode D2 are, it is necessary to illustrate, explanation circuit merely exemplary in the embodiment includes
Electronic component, be not used to limit the application battery bag charge-discharge control circuit physical circuit composition.
MCU is connect as the controller of battery bag charge-discharge control circuit by CAN communication interface (CANH, CANL)
Receive in electrokinetic cell system the message information that issues of master control part and parsed, parsing can obtain battery bag charge and discharge control electricity
The battery bag that road is controlled is in off position, electric discharge working condition or charging working condition, is then passed through according to analysis result
Control interface (control IO-1, control IO-2) issues control command to MOSFET drive modules, to drive a MOSFET pipes M1
With the break-make of the 2nd MOSFET pipes M2.
A：When battery bag is in off position：
MCU controls the first MOSFET pipes M1 and the 2nd MOSFET pipes M2 is in the state closed, in battery bag discharge and recharge
Control circuit disconnects, and battery bag is in electrokinetic cell system in the state of open circuit.
B：When battery bag is in electric discharge working condition：
MCU controls MOSFET pipes M1 switches to open, and the 2nd MOSFET pipes M2 switches are closed.Current direction such as Fig. 3 institutes
Show, electric current is flowed out by C points from load, then flows to E points by the second diode D2, B points is then flowed to, by first
MOSFET pipes M1 flows to A points, finally flows back to battery bag ground.When dash current and circulation will form loop, it is necessary to along anti-
The loop flowing in direction, but because the 2nd MOSFET pipes M2 is closed, and because the unidirectional of the second diode D2 is led
Electrical characteristics, the loop of the opposite direction is not turned on, therefore has blocked the formation of dash current and circulation.
C：When battery bag is in charging working condition：
MCU controls the 2nd MOSFET pipes M2 switches to open, and MOSFET pipes M1 switches are closed.Current direction such as Fig. 3 institutes
Show, electric current flows out by A points from battery bag, then flows to E points by the first diode D1, B points is then flowed to, by second
MOSFET pipes M2 flows to C points, finally flows back to load ground.When dash current and circulation will be formed, it is necessary to along opposite direction
Loop is flowed, but because a MOSFET pipes M1 is closed, and due to the unilateal conduction characteristic of the first diode D1,
The loop of the opposite direction is not turned on, therefore has blocked the formation of dash current and circulation.
The battery bag charge-discharge control circuit provided using the embodiment, ensure that whole electrokinetic cell system it is quick and
Stabilization work, can reach blocking battery bag it is inconsistent due to battery bag in parallel process caused by dash current and
Circulation, and circuit structure is simple.
3rd embodiment
The structured flowchart of the power battery system of electric vehicle that Fig. 4 is provided for the application 3rd embodiment, it is dynamic in the electric motor car
Power battery system includes multiple battery bags 20, multiple control circuits 10, multiple collectors 30 and control unit 40.
Wherein, multiple battery bags 20 are connected in electrokinetic cell system by the way of parallel with one another, each battery bag bag
Include it is multiple be serially connected and/or parallel connection monocell.Each control circuit 10 is in series with a battery bag 20, each control electricity
Road 10 controls the charging and discharging state of the battery bag 20 connected with its own, and the control circuit 10 is offer in the embodiment of the present invention
Any one battery bag charge-discharge control circuit, here is omitted.Each collector 30 connects a battery bag 20, is used for
The parameters such as one running parameter of battery bag 20 of collection, voltage, electric current and temperature including battery bag 20.The conduct of control unit 40
The master control part of power battery system of electric vehicle, is respectively connected with, collector with each control circuit 10 and each collector 30
The running parameter of 30 battery bags 20 that will be collected is uploaded to control unit 40, by control unit 40 according to each battery bag 20
Running parameter and the current overall driving states of electric motor car, determine that each battery bag is in off position, electric discharge work shape
State or charging working condition, and then the status information of determination is issued to correspondingly control circuit 10, realized by control circuit 10
Battery bag charging and discharging it is unidirectionally controlled.
Fourth embodiment
The structured flowchart of the power battery system of electric vehicle that Fig. 5 is provided for the application fourth embodiment, it is dynamic in the electric motor car
The electrokinetic cell of power battery system include battery bag 1, battery bag 2 ..., battery bag N-1 and battery bag N, altogether N number of battery bag, N
Individual battery bag connects to form N number of sys node (being abbreviated as N and node in Fig. 5) by the way of parallel connection, each sys node
One end connects " positive pole+", a control circuit in other end connection actuator.The actuator of the power battery system of electric vehicle
Charging and discharging state for controlling battery bag in electrokinetic cell, specific actuator includes multiple control circuits, each control circuit
Using any one the battery bag charge-discharge control circuit provided in the embodiment of the present invention, each control circuit and a battery bag
Series connection, is attached to position as shown in Figure 5, specially controls one end connection battery bag of circuit, another termination " negative pole-",
" positive pole+" shown in Fig. 5 can also be connected to and battery bag between.Each collector gathers a work ginseng for battery bag
Number, and the running parameter that will be collected is uploaded to electrokinetic cell controller.
Electrokinetic cell controller, load controller and entire car controller as power battery system of electric vehicle master control portion
Point, electrokinetic cell controller is respectively connected with each control circuit, each collector and entire car controller, for according to collection
The running parameter of device collection is monitored and fault diagnosis to each battery bag, and control instruction according to entire car controller and every
The fault diagnosis result of individual battery bag, the control circuit connected to each battery bag sends charge and discharge control signal.Load control
Device is connected with entire car controller, and load running is controlled for the control instruction according to entire car controller.Entire car controller is used for
Management and the electric discharge of scheduling vehicle and charging, control instruction is sent to electrokinetic cell controller and the load controller.
Preferably, electrokinetic cell controller, load controller, entire car controller, battery bag charge-discharge control circuit and
Collector is respectively provided with CAN communication interface, to realize the transmission of bus message each other.
In one embodiment, when vehicle is in driving condition, the control instruction of entire car controller indicates integral power
Battery is in discharge condition, meanwhile, electrokinetic cell controller judges that each battery bag in electrokinetic cell is normal, electrokinetic cell
Controller sends discharge control signal to the control circuit that each battery bag is connected, in the control circuit of each battery bag series connection
In, control module control discharge switching circuit is in the conduction state, and control charge switch circuit is off state, so that each
Battery bag is discharged.
In one embodiment, when vehicle is in driving condition, the control instruction of entire car controller indicates electrokinetic cell
In a part be in discharge condition, meanwhile, electrokinetic cell controller judges need that entire car controller indicates in discharge condition
Battery bag it is normal, electrokinetic cell controller to need to be in discharge condition each battery bag connect control circuit send put
The control signal of electricity, in each need to be in the control circuit that the battery bag of discharge condition is connected, control module control electric discharge is opened
Powered-down road is in the conduction state, and control charge switch circuit is off state, so that each need to be in discharge condition battery bag
Discharged；Electrokinetic cell controller sends what is disconnected to the control circuit that each battery bag that need not be in discharge condition is connected
Control signal, in each need not be in the control circuit that the battery bag of discharge condition is connected, control module control discharge switch
Circuit and charge switch circuit are in off state, so that each battery bag that need not be in discharge condition is exited and discharged back
Road.
In one embodiment, when vehicle is in driving condition, the control instruction of entire car controller indicates electrokinetic cell
In partly or entirely be in discharge condition, meanwhile, electrokinetic cell controller judge entire car controller indicate need be in discharge
In the battery bag of state there is failure in part battery bag, electrokinetic cell controller to need to be in discharge condition and in the absence of failure
Each battery bag series connection control circuit send electric discharge control signal, each need to be in discharge condition and in the absence of therefore
In the control circuit of the battery bag series connection of barrier, control module control discharge switching circuit is in the conduction state, controls charge switch
Circuit is off state, so that each need to be in the discharge condition and battery bag in the absence of failure is discharged；Power electric
Pool controller sends the control for disconnecting to the control circuit that need not be in each battery bag series connection that is discharge condition and there is failure
Signal processed, in each need not be in the control circuit of battery bag series connection that is discharge condition and there is failure, control module control
Discharge switching circuit processed and charge switch circuit are in off state, so that each need not be in discharge condition and presence event
The battery bag of barrier exits discharge loop.
In one embodiment, when vehicle is in on-position, the control instruction of entire car controller indicates integral power
Battery is in charged state, meanwhile, electrokinetic cell controller judges that each battery bag in electrokinetic cell is normal, electrokinetic cell
Controller sends charging control signal to the control circuit that each battery bag is connected, in the control circuit of each battery bag series connection
In, control module control discharge switching circuit is off state, and control charge switch circuit is in the conduction state, so that each
Battery bag is charged.
In one embodiment, when vehicle is in on-position, the control instruction of entire car controller indicates electrokinetic cell
In a part be in charged state, meanwhile, electrokinetic cell controller judges need that entire car controller indicates in charged state
Battery bag it is normal, electrokinetic cell controller to need to be in charged state each battery bag connect control circuit send fill
The control signal of electricity, in each need to be in the control circuit that the battery bag of charged state is connected, control module control charging is opened
Powered-down road is in the conduction state, and control discharge switching circuit is off state, so that each need to be in charged state battery bag
Charged；Electrokinetic cell controller sends what is disconnected to the control circuit that each battery bag that need not be in charged state is connected
Control signal, in each need not be in the control circuit that the battery bag of charged state is connected, control module control charge switch
Circuit and discharge switching circuit are in off state, so that each battery bag that need not be in charged state is exited and charged back
Road.
In one embodiment, when vehicle is in on-position, the control instruction of entire car controller indicates electrokinetic cell
In partly or entirely be in charged state, meanwhile, electrokinetic cell controller judge entire car controller indicate need be in charging
In the battery bag of state there is failure in part battery bag, electrokinetic cell controller to need to be in charged state and in the absence of failure
Each battery bag series connection control circuit send charge control signal, each need to be in charged state and in the absence of therefore
In the control circuit of the battery bag series connection of barrier, control module control charge switch circuit is in the conduction state, controls discharge switch
Circuit is off state, so that each need to be in the charged state and battery bag in the absence of failure is charged；Power electric
Pool controller sends the control for disconnecting to the control circuit that need not be in each battery bag series connection that is charged state and there is failure
Signal processed, in each need not be in the control circuit of battery bag series connection that is charged state and there is failure, control module control
Charge switch circuit processed and discharge switching circuit are in off state, so that each need not be in charged state and presence event
The battery bag of barrier exits charge circuit.
Wherein, electrokinetic cell controller by set up battery multivariable be input into battery model, based on discharge cycles number of times,
The self study amendment of depth of discharge, open-circuit voltage, the internal resistance of cell, discharge current, battery temperature etc., establishes suitable various complexity
SOC (battery remaining power), the SOP (maximum charge-discharge electric power) and SOH (cell health state) computational algorithm of operating mode, carry out event
Barrier diagnosis.
Collector includes voltage sampling circuit；Current sampling circuit；Temperature sampling circuit；It is connected with current sampling circuit
The first signal processing circuit；The secondary signal process circuit being connected with temperature sampling circuit；With voltage sampling circuit, first
The ADC converters that signal processing circuit and secondary signal process circuit are respectively connected with；And the micro- place being connected with ADC converters
Reason device, wherein, microprocessor is provided with and is sampled for the voltage signal that samples voltage sampling circuit, current sampling circuit
Current signal and the temperature signal that samples of temperature sampling circuit send to the CAN communication of electrokinetic cell controller and connect
Mouthful.
Specifically, the control source of each voltage sampling circuit collection is converted into number to the ADC converters inside collector
Word signal output is transferred to the voltage signal for collecting by bus message form to collector internal microprocessor MCU, MCU
Electrokinetic cell controller.The current signal for collecting is converted into voltage signal by the current divider in current sampling circuit, then defeated
Enter the first signal processing circuit and ADC converters inside to collector, be converted into data signal and export to give collector inside
Micro-processor MCV, MCU gives electrokinetic cell controller by bus message form the current signal transfer for collecting.Temperature is adopted
The temperature signal for sampling is converted into voltage signal by the thermistor in sample circuit, then inputs to second inside collector
Signal processing circuit and ADC converters, are converted into data signal and export to give collector internal microprocessor MCU, and MCU is by total
The temperature signal for collecting is transferred to electrokinetic cell controller by report from a liner text form.
The power battery system of electric vehicle provided using the embodiment, when above establishing the beginning by cable, collector sampling battery electricity first
Pressure, temperature and electric current, are receiving above letter to electrokinetic cell controller, electrokinetic cell controller information transfer by bus
After breath, battery SOC is calculated in real time and to Battery Diagnostic etc., if diagnosis fault-free, actuator controls all N and node enters
Prepare the state of electric discharge, when vehicle is in the energy back stage, all N and node switch to the state of charging.If certain is simultaneously
This and node, then by actuator, exited supply network by node battery exception, to ensure traffic safety, and notifies vehicle control
Device processed carries out discharge power or charge power double-direction control in real time.
As can be seen from the above description, the embodiment of the present invention realizes following technique effect：Using electricity of the invention
Pond bag charge-discharge control circuit is applied to power battery system of electric vehicle, or uses power battery of electric vehicle system of the invention
System, can either strengthen the fault-tolerant ability of electrokinetic cell system, and when certain battery bag in electrokinetic cell breaks down, system is still
Can normally for vehicle is powered, and in electrokinetic cell battery bag coherence request reduction, and electrokinetic cell the use longevity
Life length.
A kind of battery bag charge-discharge control circuit provided by the present invention and power battery system of electric vehicle are carried out above
It is discussed in detail, specific case used herein is set forth to principle of the invention and implementation method, above example
Explanation be only intended to help and understand the method for the present invention and its core concept；Simultaneously for those of ordinary skill in the art,
According to thought of the invention, will change in specific embodiments and applications, in sum, in this specification
Appearance should not be construed as limiting the invention.
Claims (10)
1. a kind of battery bag charge-discharge control circuit, it is characterised in that including：
Discharge switching circuit, for being turned on when battery bag is discharged, turns off when the battery bag charges；
Charge switch circuit, for being turned on when the battery bag charges, turns off when the battery bag is discharged, wherein, it is described
Discharge switching circuit is in series with the charge switch circuit, and one end connects the battery bag after concatenation, and the other end connects
Connect the load of the battery bag；
Control module, is respectively connected with the discharge switching circuit with the charge switch circuit, for controlling the electric discharge
The on off operating mode of on-off circuit and the charge switch circuit；
First unidirectionally controlled circuit, is in parallel with the discharge switching circuit, via the electric current of the described first unidirectionally controlled circuit
Direction it is opposite with the sense of current for flowing through the discharge switching circuit；
Second unidirectionally controlled circuit, is in parallel with the charge switch circuit, via the electric current of the described second unidirectionally controlled circuit
Direction it is opposite with the sense of current for flowing through the charge switch circuit.
2. battery bag charge-discharge control circuit according to claim 1, it is characterised in that the battery bag includes multiple phases
Mutual series connection and/or the monocell of parallel connection.
3. battery bag charge-discharge control circuit according to claim 1, it is characterised in that
The discharge switching circuit is managed with the charge switch circuit including MOSFET；And
The control module includes that controller and the MOSFET pipes being respectively connected with the controller and the MOSFET pipes drive
Dynamic model block.
4. battery bag charge-discharge control circuit according to claim 3, it is characterised in that the controller is provided with CAN
Bus communication interface, the CAN communication interface is used to receive and dispatch the control discharge switching circuit with charge switch electricity
The message information of the on off operating mode on road.
5. battery bag charge-discharge control circuit according to claim 1, it is characterised in that the first unidirectionally controlled circuit
Include diode with the described second unidirectionally controlled circuit, the diode of the first unidirectionally controlled circuit is unidirectional with described second
Control the conducting direction of the diode of circuit opposite.
6. a kind of power battery system of electric vehicle, it is characterised in that including：
Multiple battery bags parallel with one another, each battery bag include multiple be serially connected and/or parallel connection monocell；
Multiple control circuit, each described control circuit is in series with a battery bag, and each described control circuit is used to control
One charging and discharging state of battery bag, the battery bag charge and discharge for controlling circuit any one of claim 1 to 5 is automatically controlled
Circuit processed；
Multiple collectors, each collector is used to gather a running parameter for battery bag；And
Control unit, described control unit is respectively connected with the multiple control circuit and the multiple collector.
7. power battery system of electric vehicle according to claim 6, it is characterised in that described control unit includes：
Electrokinetic cell controller, is respectively connected with the multiple control circuit, the multiple collector and entire car controller, uses
Each battery bag is monitored and fault diagnosis in the running parameter gathered according to the collector, and according to the vehicle control
The control instruction of device processed and the fault diagnosis result of each battery bag, the control circuit connected to each battery bag send discharge and recharge
Control signal；
Load controller, is connected with the entire car controller, negative for the control instruction control according to the entire car controller
Carrying row；And
The entire car controller, for managing and dispatching vehicle electric discharge and charge, to the electrokinetic cell controller and described negative
Set controller sends control instruction.
8. power battery system of electric vehicle according to claim 7, it is characterised in that the electrokinetic cell controller, institute
State load controller includes CAN communication interface with the entire car controller.
9. power battery system of electric vehicle according to claim 7, it is characterised in that the collector includes：
Voltage sampling circuit；Current sampling circuit；Temperature sampling circuit；The first signal being connected with the current sampling circuit
Process circuit；The secondary signal process circuit being connected with the temperature sampling circuit；With the voltage sampling circuit, described
The ADC converters that one signal processing circuit and the secondary signal process circuit are respectively connected with；And with the ADC converters phase
The microprocessor of connection,
Wherein, the microprocessor is provided with and is adopted for the voltage signal that samples the voltage sampling circuit, the electric current
Sample circuit sampling to current signal and the temperature signal that samples of the temperature sampling circuit send to the electrokinetic cell control
The CAN communication interface of device processed.
10. power battery system of electric vehicle according to claim 9, it is characterised in that the current sampling circuit includes
Current divider；The temperature sampling circuit includes thermistor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710029761.3A CN106786964A (en) | 2017-01-16 | 2017-01-16 | Battery bag charge-discharge control circuit and power battery system of electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710029761.3A CN106786964A (en) | 2017-01-16 | 2017-01-16 | Battery bag charge-discharge control circuit and power battery system of electric vehicle |
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| CN106786964A true CN106786964A (en) | 2017-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710029761.3A Pending CN106786964A (en) | 2017-01-16 | 2017-01-16 | Battery bag charge-discharge control circuit and power battery system of electric vehicle |
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| CN108303656A (en) * | 2018-02-28 | 2018-07-20 | 长沙优力电驱动系统有限公司 | Battery pack charge-discharge testing device |
| CN109088461A (en) * | 2018-10-10 | 2018-12-25 | 北京动力京工科技有限公司 | A kind of electrically independent multichannel variety classes battery pack parallel control device of charge and discharge and method |
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| CN109119708A (en) * | 2018-08-17 | 2019-01-01 | 深圳市铭隆动力科技有限公司 | A kind of Multifunctional battery dynamical system |
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