CN206389154U - 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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- CN206389154U CN206389154U CN201720048543.XU CN201720048543U CN206389154U CN 206389154 U CN206389154 U CN 206389154U CN 201720048543 U CN201720048543 U CN 201720048543U CN 206389154 U CN206389154 U CN 206389154U
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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
- 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
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Abstract
The utility model 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 turned on when battery bag is discharged, turned off when battery bag charges；The charge switch circuit turned on when battery bag charges, turned off when battery bag is discharged；For the control module for the on off operating mode for controlling discharge switching circuit and 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 utility model 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
The utility model is related to power battery technology field, more particularly to a kind of battery bag charge-discharge control circuit and electronic
Car electrokinetic cell system.
Background technology
Electrokinetic cell refers to the battery that power is provided for transport facility, typically with respect to for portable electric appts
For the compact battery for providing energy, for example, electric automobile, electric train, electric bicycle, golf cart provide power
Battery.Lead-acid power accumulator, Ni-MH power cell, lithium-ion-power cell can be divided into according to the difference of cell reaction principle
Etc..
No matter which kind of electrokinetic cell is used, in order to lift the course continuation mileage of electric car, it will usually use multiple battery bag strings
The technology of connection, at present, electric automobile on the market, electrokinetic cell is mostly using first by multiple monocells parallel connection encapsulation formation electricity
Chi Bao, the technical scheme being powered that then multiple battery bags are connected.This technical scheme is in actual use, 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 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 moved
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 that when percentage of batteries breaks down, hybrid power passenger car can also normal work, and allow only to change its middle part
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, cause the electrokinetic cell life-span during battery bag parallel operation
Rapid decay, and the life-span of electronic device decline to a great extent or damaged.
When in summary, for using batteries in parallel connection bag in electrokinetic cell system present in prior art, electrokinetic cell
The technical problem of short life, not yet proposes effective solution at present.
Utility model content
The purpose of this utility model is to provide a kind of battery bag charge-discharge control circuit and power battery system of electric vehicle, with
When solving to use 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 utility model 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 during bag charging；Charge switch circuit, for being turned on when battery bag charges, is turned 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 includes multiple be serially connected and/or monocell in parallel.
Further, discharge switching circuit includes MOSFET pipes with charge switch circuit；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 on-off circuit and the on off operating mode of 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 utility model 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 circuits, each control circuit is in series with a battery bag, each control electricity
Road is used for the charging and discharging state for controlling a battery bag, and any one the battery bag discharge and recharge for controlling circuit to be provided for the application
Control circuit；Multiple collectors, each collector is used for the running parameter for gathering a battery bag；And control unit, control
Unit is respectively connected with multiple control circuits and multiple collectors.
Further, control unit includes：Electrokinetic cell controller, with multiple control circuits, 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 control instruction and the fault diagnosis result of each battery bag according to entire car controller, the control electricity connected to each battery bag
Road sends charge and discharge control signal；Load controller, is connected with entire car controller, for referring to according to the control of 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 set CAN communication to connect respectively
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；With with ADC converters
The microprocessor being connected, wherein, voltage signal, the electric current that microprocessor is provided with for voltage sampling circuit to be sampled are adopted
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.
A kind of electrical vehicular power electricity of the utility model by battery bag charge-discharge control circuit and with the control circuit
Cell system, realizes in electrokinetic cell system and forms electrokinetic cell by the way of multiple battery bags are connected in parallel, at any one
When battery bag goes wrong, the battery bag is isolated, it is to avoid because some battery bag goes wrong and causes the prominent of parking
Failure is sent out, the potential safety hazard of burst lay-by can be eliminated well, strengthens the good experience that consumer drives for electric car,
Battery bag charge-discharge control circuit include discharge switching circuit, charge switch circuit, control module, the first unidirectionally controlled circuit and
Second unidirectionally controlled circuit is, it is necessary to which when battery bag is isolated, control module control discharge switching circuit and charge switch circuit are located
In off state；In discharge process, control module control discharge switching circuit is in the conduction state, controls charge switch circuit
State is off, now, electric current realizes electric discharge by battery bag flow direction load, and because charge switch circuit is off shape
The one-way conduction function of state and the second unidirectionally controlled circuit, is not in circulation caused by the mutual discharge and recharge of each battery bag；
In charging process, control module control discharge switching circuit is off state, and control charge switch circuit is on shape
State, now, electric current are charged by loading to flow to battery bag and realize, and because discharge switching circuit is off state and first
The one-way conduction function of unidirectionally controlled circuit, is not in circulation caused by the mutual discharge and recharge of each battery bag, thus, it is possible to have
Effect avoids electrokinetic cell from self discharge problem is filled, and reduces the rate of decay of electrokinetic cell, lifts vehicle service life.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding to of the present utility model, constitutes the part of the application,
Do not constitute and limit of the present utility model.In the accompanying drawings：
Fig. 1 is the system architecture diagram of electrokinetic cell system in the prior art；
The structured flowchart for the battery bag charge-discharge control circuit that Fig. 2 provides for the application first embodiment；
The circuit theory diagrams for the battery bag charge-discharge control circuit that Fig. 3 provides for the application second embodiment；
The structured flowchart for the power battery system of electric vehicle that Fig. 4 provides for the application 3rd embodiment；
The structured flowchart for the power battery system of electric vehicle that Fig. 5 provides for the application fourth embodiment.
Embodiment
For the purpose of this utility model, technical scheme and advantage is more clearly understood, with reference to embodiment and attached
Figure, is described in further details to the utility model.Here, exemplary embodiment of the present utility model and its illustrate be used for solve
The utility model is released, but is not intended as limiting of the present utility model.
In the utility model each embodiment, in electrokinetic cell system by the way of multiple battery bags are connected in parallel shape
It is and normal so that when certain sys node breaks down, supply network can be exited by belonging to the battery bag of this node into electrokinetic cell
Battery bag is isolated, it is to avoid the use of the battery bag of the other nodes of influence, strengthens electrokinetic cell system robustness.
On this basis, using the utility model proposes discharge and recharge of the battery bag charge-discharge control circuit to battery bag
Journey is controlled, relatively low to the coherence request between each battery bag, even if each battery bag has structure, parameter etc. and differed
The situation of cause, be also not in each battery bag each other from the problem of filling self discharge, no matter direction or discharged in charging
Direction, each battery bag is not interfere with each other, realizes that charging and discharging is unidirectionally controlled, solve in the prior art electrokinetic cell due to
Cause the technical problem of electrokinetic cell life-span rapid decay from self discharge problem is filled.
In summary, each embodiment of the utility model is provided battery bag charge-discharge control circuit and electrical vehicular power electricity
Cell system can either strengthen the fault-tolerant ability of electrokinetic cell system, when some battery bag in electrokinetic cell breaks down, be
System still is able to normally to power for vehicle, and to the requirement reduction of battery bag uniformity in electrokinetic cell, and electrokinetic cell makes
Use long lifespan.
The main thought conceived by the utility model of the above, is described in detail each implementation that the utility model is provided
Under for example.
First embodiment
The structured flowchart for the battery bag charge-discharge control circuit that Fig. 2 provides 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 electrokinetic cell system with multiple batteries in parallel connection bags is controlled, specifically, such as Fig. 2 institutes
Show, it is single that the battery bag charge-discharge control circuit includes discharge switching circuit 11, charge switch circuit 12, control module 13, first
To the control unidirectionally controlled circuit 15 of circuit 14 and second.
Discharge switching circuit 11 is used to turn on when battery bag is discharged, and is turned off when battery bag charges；Charge switch circuit
12 are used to turn 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
It is opposite to the sense of current with flowing through discharge switching circuit 11；Via the sense of current of the second unidirectionally controlled circuit 15 with flowing through
The sense of current of charge switch circuit 12 is opposite；Control module 13 is used to control the discharge switching circuit and the charge switch
The on off operating mode of circuit.Wherein, those skilled in the art, can be based on normal known in this area when realizing each circuit and module
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 is issued 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 received and controls discharge switching circuit 11 with filling
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, and either the current working condition of electric car participates in discharge and recharge without the battery bag or other electric 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 disconnected, 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 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 form loop, electric current
Flowed to and loaded by battery bag, 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 caused by the mutual discharge and recharge of each battery bag, thus is kept away
Exempt from electrokinetic cell and occur the problem of some battery bag charges in discharge process.
When the parsing of control module 13 control instruction obtains the information that battery bag needs are charged, for example, electric 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 form loop, electric current
Battery bag is flowed to by load, charging is realized.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 caused by the mutual discharge and recharge of each battery bag, thus is kept away
Exempt from electrokinetic cell and occur the problem of some battery bag is discharged in charging process.
The battery bag charge-discharge control circuit provided using the embodiment, applied to 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, reduce the rate of decay of electrokinetic cell, lift vehicle service life.
Wherein, when forming battery bag, can be serially connected according to the actual use situation of electric car using multiple monocells,
Parallel with one another or series connection is formed with the mode that parallel connection is mixed, and each monocell can be similar battery, or inhomogeneity electricity
Pond etc., is not limited the generation type of battery bag in the application.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, the MOSFET pipes that control module 13 includes controller and is respectively connected with controller and MOSFET pipes drive
Dynamic model block, signal is sent from controller to MOSFET pipes drive module, drives the conducting and shut-off of MOSFET pipes.Or in electric discharge
On-off circuit 11 is with using other switching tubes in charge switch circuit 12, such as large power triode.Further, controller
It is provided with CAN communication interface, CAN communication interface is used to receiving control discharge switching circuit and charge switch circuit
The message information of on off operating mode, such as the message information that the master control part received in electrokinetic cell system is issued.
Wherein, diode, the first unidirectional control are included in the first unidirectionally controlled circuit 15 of unidirectionally controlled circuit 14 and second
The conducting direction of the diode of the diode of circuit 14 processed and the second unidirectionally controlled circuit 15 was on the contrary, so as to be charged and discharged
Cheng Zhong, battery bag charge-discharge control circuit only can be with one-way conduction.
Second embodiment
The circuit theory diagrams for the battery bag charge-discharge control circuit that Fig. 3 provides 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, the first MOSFET pipes M1, the 2nd MOSFET pipes
M2, the first diode D1 and the second diode D2 are, it is necessary to which explanation circuit merely exemplary in explanation, 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 the first MOSFET pipes M1
With the 2nd MOSFET pipes M2 break-make.
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
Circuit is controlled to disconnect, state of the battery bag in open circuit in electrokinetic cell system.
B：When battery bag is in electric discharge working condition：
MCU controls the first 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, is then flowed to E points by the second diode D2, is then flowed to B points, pass through first
MOSFET pipes M1 flows to A points, with finally flowing back to battery bag.When dash current and circulation will form loop, it is necessary to along anti-
The loop flowing in direction, but be due to that 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 the first MOSFET pipes M1 switches are closed.Current direction such as Fig. 3 institutes
Show, electric current is flowed out from battery bag by A points, is then flowed to E points by the first diode D1, is then flowed to B points, pass through 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 is due to that the first MOSFET pipes M1 is closed, and due to the first diode D1 unilateal conduction characteristic,
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
Stable work, can reach the dash current that blocks battery bag in parallel process caused by battery bag is inconsistent and
Circulation, and circuit structure is simple.
3rd embodiment
The structured flowchart for the power battery system of electric vehicle that Fig. 4 provides for the application 3rd embodiment, it is dynamic in the electric 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 multiple be serially connected and/or monocell in parallel.Each control circuit 10 is in series with a battery bag 20, each control electricity
Road 10 controls the charging and discharging state of battery bag 20 connected with its own, and the control circuit 10 is carries in the utility model embodiment
Any one the battery bag charge-discharge control circuit supplied, is repeated no more here.Each collector 30 connects a battery bag 20,
Running parameter for gathering a battery bag 20, includes the parameter such as voltage, electric current and temperature of battery bag 20.Control unit 40
As the master control part of power battery system of electric vehicle, it is respectively connected with, adopts with each control circuit 10 and each collector 30
The running parameter of the battery bag 20 collected is uploaded to control unit 40 by storage 30, by control unit 40 according to each battery bag
The current overall driving states of 20 running parameter and electric car, determine that each battery bag is in off position, electric discharge work
Make state or charging working condition, and then the status information of determination is issued to correspondingly control circuit 10, by control circuit 10
Realize the unidirectionally controlled of battery bag charging and discharging.
Fourth embodiment
The structured flowchart for the power battery system of electric vehicle that Fig. 5 provides for the application fourth embodiment, it is dynamic in the electric 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 in parallel, 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 utility model embodiment, each control circuit and an electricity
Chi Bao connects, and is attached to position as shown in Figure 5, specially controls one end connection battery bag of circuit, and another termination is " negative
Pole-", can also be connected to " positive pole+" shown in Fig. 5 between battery bag.Each collector gathers the work of a battery bag
Make parameter, and the running parameter 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, for controlling load running according to the control instruction of 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 sets CAN communication interface respectively, 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
The control circuit that controller is connected to each battery bag sends discharge control signal, the control circuit connected in each battery bag
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 in discharge condition each battery bag connect control circuit send puts
The control signal of electricity, in the control circuit of each battery bag series connection that need to be in discharge condition, control module control electric discharge is opened
Powered-down road is in the conduction state, and control charge switch circuit is off state, so as to need to each be in discharge condition battery bag
Discharged；Electrokinetic cell controller sends what is disconnected to the control circuit of each battery bag series connection that need not be in discharge condition
Control signal, in the control circuit of each battery bag series connection that need not be in discharge condition, control module control discharge switch
Circuit and charge switch circuit are in off state, are discharged back so as to need not each be exited in the battery bag of discharge condition
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 in discharge condition and in the absence of failure
Each battery bag series connection control circuit send electric discharge control signal, it is each need 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 in discharge condition and discharged in the absence of the battery bag of failure；Power electric
Pool controller sends the control disconnected 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 control circuit that need not be in 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 in discharge condition and exist therefore
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
The control circuit that controller is connected to each battery bag sends charging control signal, the control circuit connected in each battery bag
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 in charged state each battery bag connect control circuit send fills
The control signal of electricity, in the control circuit of each battery bag series connection that need to be in charged state, control module control charging is opened
Powered-down road is in the conduction state, and control discharge switching circuit is off state, so as to need to each be in charged state battery bag
Charged；Electrokinetic cell controller sends what is disconnected to the control circuit of each battery bag series connection that need not be in charged state
Control signal, in the control circuit of each battery bag series connection that need not be in charged state, control module control charge switch
Circuit and discharge switching circuit are in off state, are charged back so as to need not each be exited in the battery bag of charged state
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 charge
In the battery bag of state there is failure in part battery bag, electrokinetic cell controller to need in charged state and in the absence of failure
Each battery bag series connection control circuit send charging control signal, it is each need 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 in charged state and charged in the absence of the battery bag of failure；Power electric
Pool controller sends the control disconnected 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 control circuit that need not be in 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 in charged state and exist therefore
The battery bag of barrier exits charge circuit.
Wherein, electrokinetic cell controller by set up battery multivariable input 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), 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；The micro- place being connected with ADC converters
Device is managed, wherein, voltage signal, the current sampling circuit that microprocessor is provided with for voltage sampling circuit to be sampled are sampled
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 collected by bus message form to collector internal microprocessor MCU, MCU
Electrokinetic cell controller.The current signal collected 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 inside collector
Micro-processor MCV, MCU gives electrokinetic cell controller by bus message form the current signal transfer collected.Temperature is adopted
The temperature signal sampled 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 pass through total to collector internal microprocessor MCU, MCU
The temperature signal collected 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, give electrokinetic cell controller, electrokinetic cell controller is receiving above letter by bus information transfer
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
Node battery is abnormal, then by actuator, this and node exits supply network, 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 utility model embodiment realizes following technique effect：Using this practicality
New battery bag charge-discharge control circuit is applied to power battery system of electric vehicle, or uses electric car of the present utility model
Electrokinetic cell system, can either strengthen the fault-tolerant ability of electrokinetic cell system, and event occurs in some battery bag in electrokinetic cell
During barrier, system still is able to normally power for vehicle, and the coherence request of battery bag in electrokinetic cell is reduced, and power electric
The service life in pond is long.
Above to a kind of battery bag charge-discharge control circuit and power battery system of electric vehicle provided by the utility model
It is described in detail, specific case used herein is set forth to principle of the present utility model and embodiment, with
The explanation of upper embodiment is only intended to help and understands method of the present utility model and its core concept；Simultaneously for this area
Those skilled in the art, according to thought of the present utility model, will change in specific embodiments and applications, comprehensive
Upper described, this specification content should not be construed as to limitation of the present utility model.
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, is turned off when the battery bag charges；
Charge switch circuit, for being turned on when the battery bag charges, is turned 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
On-off circuit and the on off operating mode of 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
Mutually connect and/or monocell in parallel.
3. battery bag charge-discharge control circuit according to claim 1, it is characterised in that
The discharge switching circuit includes MOSFET with the charge switch circuit and managed；And
The MOSFET pipes that the control module includes controller and is 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 and 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 and described second unidirectional
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 includes multiple be serially connected and/or monocell in parallel；
Multiple control circuits, each control circuit is in series with a battery bag, and each control circuit is used to control
The charging and discharging state of one 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 for the running parameter for gathering a 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 fault diagnosis result of the control instruction of device processed and each battery bag, the control circuit connected to each battery bag sends discharge and recharge
Control signal；
Load controller, is connected with the entire car controller, is controlled for the control instruction according to the entire car controller negative
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
Stating load controller and the entire car controller includes CAN communication interface.
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；With with the ADC converters phase
The microprocessor of connection,
Wherein, voltage signal, the electric current that the microprocessor is provided with for the voltage sampling circuit to be sampled are adopted
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720048543.XU CN206389154U (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 |
|---|---|---|---|
| CN201720048543.XU CN206389154U (en) | 2017-01-16 | 2017-01-16 | Battery bag charge-discharge control circuit and power battery system of electric vehicle |
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| Publication Number | Publication Date |
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| CN206389154U true CN206389154U (en) | 2017-08-08 |
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| CN201720048543.XU Active CN206389154U (en) | 2017-01-16 | 2017-01-16 | Battery bag charge-discharge control circuit and power battery system of electric vehicle |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111355252A (en) * | 2018-12-20 | 2020-06-30 | 南京四象新能源科技有限公司 | Distributed energy storage system and charging and discharging method thereof |
| CN112087008A (en) * | 2019-06-12 | 2020-12-15 | 苏州宝时得电动工具有限公司 | Battery pack working state identification method and battery pack |
| CN114421028A (en) * | 2020-10-28 | 2022-04-29 | 中车时代电动汽车股份有限公司 | Battery system and battery pack echelon utilization recombination method |
| WO2024108401A1 (en) * | 2022-11-22 | 2024-05-30 | 厦门新能达科技有限公司 | Battery pack parallel connection method, battery management system, battery pack, and electrical device |
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2017
- 2017-01-16 CN CN201720048543.XU patent/CN206389154U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111355252A (en) * | 2018-12-20 | 2020-06-30 | 南京四象新能源科技有限公司 | Distributed energy storage system and charging and discharging method thereof |
| CN111355252B (en) * | 2018-12-20 | 2024-06-21 | 南京四象新能源科技有限公司 | Distributed energy storage system and charging and discharging method thereof |
| CN112087008A (en) * | 2019-06-12 | 2020-12-15 | 苏州宝时得电动工具有限公司 | Battery pack working state identification method and battery pack |
| CN112087008B (en) * | 2019-06-12 | 2024-01-09 | 苏州宝时得电动工具有限公司 | Battery pack working state identification method and battery pack |
| CN114421028A (en) * | 2020-10-28 | 2022-04-29 | 中车时代电动汽车股份有限公司 | Battery system and battery pack echelon utilization recombination method |
| WO2024108401A1 (en) * | 2022-11-22 | 2024-05-30 | 厦门新能达科技有限公司 | Battery pack parallel connection method, battery management system, battery pack, and electrical device |
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