CN107554323A - The control system and electric automobile of a kind of power battery pack - Google Patents
The control system and electric automobile of a kind of power battery pack Download PDFInfo
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- CN107554323A CN107554323A CN201710625217.5A CN201710625217A CN107554323A CN 107554323 A CN107554323 A CN 107554323A CN 201710625217 A CN201710625217 A CN 201710625217A CN 107554323 A CN107554323 A CN 107554323A
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- voltage
- battery pack
- branch road
- power battery
- management controller
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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 present invention discloses the control system and electric automobile of a kind of power battery pack, and control system includes：Battery management controller and voltage detecting circuit；Power battery pack includes N number of branch road；N number of branch circuit parallel connection is together；N is the integer more than or equal to 1；Each branch road is cascaded including M battery pack, and M is the integer more than or equal to 2；Each corresponding voltage detecting circuit of the battery pack；Voltage detecting circuit, for detecting the voltage of corresponding battery pack, and voltage is sent to the battery management controller；Battery management controller, for obtaining the voltage on corresponding branch road according to the voltage of battery pack, closed or disconnected by the switch on the independent controlling brancher of voltage on corresponding branch road.Due to the corresponding voltage detecting circuit of each battery pack, therefore the control system can realize the complete detection to power battery pack, can be with each branch voltage of independent detection, each branch road of independent control.The overall operating efficiency of power battery pack can be improved.
Description
Technical field
The present invention relates to technical field of battery control, more particularly to a kind of control system of power battery pack and electronic vapour
Car.
Background technology
Continuous exhausted and environmental pollution serious with the energy, electric automobile is increasingly paid attention at present.Electrokinetic cell
Group is used to provide power for electric automobile.
300V-450V voltage is probably needed for the electric automobile of car class, it is general for the electric automobile of bus class
Need 600V-700V voltage.Because the voltage of single battery is too small, therefore power battery pack is usually to include multiple battery packs
It is cascaded, and each battery pack includes multiple batteries series connection or connection in series-parallel together.
Referring to Fig. 1, the figure is the schematic diagram of power battery pack in the prior art.
Fig. 1 is introduced so that power battery pack includes four branch roads as an example.The battery pack of each branch road is probably multiple electricity
Pond group is cascaded.In order to which each branch road only illustrates one battery pack of picture in simple graph 1.
Power battery pack needs charge or discharge at work.Therefore, it is necessary to monitor the parameters of power battery pack, enter
And control the working condition of power battery pack.
In the prior art, in order to bigger capacity is provided, it is necessary to multiple branch circuit parallel connections together, it is and dry only after parallel connection
Voltage and current is detected on the G of road.When finding that voltage or electric current exceed preset value, the battery pack on which branch road Z can not be determined
It there is a problem, it is necessary to control all battery packs to be stopped.Obviously, this control mode of prior art has a strong impact on dynamic
The operating efficiency of power battery pack.
The content of the invention
In order to solve above technical problem present in prior art, the present invention provides a kind of control system of power battery pack
System and electric automobile, it is capable of the safety of each battery pack of complete detection, improves the operating efficiency of integral power battery pack.
The present invention provides a kind of control system of power battery pack, including：Battery management controller and voltage detecting circuit；
Power battery pack includes N number of branch road；
N number of branch circuit parallel connection is together；The N is the integer more than or equal to 1；
Each branch road is cascaded including M battery pack, and the M is the integer more than or equal to 2；
Each corresponding voltage detecting circuit of the battery pack；
The voltage detecting circuit, for detecting the voltage of corresponding battery pack, and the voltage is sent to the battery
Management Controller；
The battery management controller, for obtaining the voltage on corresponding branch road according to the voltage of the battery pack, by right
The switch on the independent controlling brancher of the voltage on branch road is answered to close or disconnect.
Preferably, the power battery pack comprises at least following two branch roads：Tie point and the second branch road；
The battery management controller, the voltage for being sent according to each voltage detecting circuit obtain tie point
On voltage and the second branch road on voltage；If voltage during power battery pack electric discharge in the tie point is higher than the
Voltage on two branch roads, control the switch in the tie point to close, treat on the voltage and the second branch road in tie point
When the voltage difference of voltage is less than predetermined voltage, the switch closure on the second branch road is controlled；
The battery management controller, if being additionally operable to the voltage during power battery pack charging in the tie point
Higher than the voltage on the second branch road, the switch closure on second branch road is controlled, treats the voltage in tie point and second
When the voltage difference of voltage on road is less than predetermined voltage, the switch closure in tie point is controlled.
Preferably, the tie point is provided with the first current sensor, and second branch road is provided with the second current sensor；
First current sensor, for detecting the electric current of the tie point, the electric current of the tie point is sent out
Give the battery management controller；
Second current sensor, for detecting the circuit of second branch road, the electric current of second branch road is sent out
Give the battery management controller；
The battery management controller, for when the power battery pack exits work, judging the tie point
When the current absolute value of current absolute value and the second branch road is respectively less than the first predetermined current value, control tie point on switch and
Switch on second branch road disconnects.
Preferably, in addition to：Current sensor；
A current sensor is set on each branch road；
The current sensor, the battery management control is sent to for the electric current of detection branch, and by the electric current of detection
Device processed；
The battery management controller, for when the N is more than or equal to 3, work to be exited in the power battery pack
When and branch road on the absolute value of electric current when being respectively less than the second predetermined current value, according to electric current on branch road absolute value from small to large
Order disconnects the switch on corresponding branch road successively.
Preferably, the battery management controller, when being additionally operable to judge that the electric current of branch road exceedes predetermined current value, control pair
Answer switching off on branch road.
Preferably, in addition to：Microprocessor；
Each corresponding microprocessor of the battery pack；
The microprocessor, it is described for the ID of itself and the detection of corresponding voltage detecting circuit voltage to be transmitted to
Battery management controller；
The battery management controller, for obtaining the voltage on corresponding branch road according to the ID and the voltage received,
One-to-one relationship be present with branch road in the ID.
Preferably, in addition to：Voltage isolated location；
The voltage isolated location is connected between the voltage detecting circuit and the microprocessor, for by the electricity
The voltage of pressure detection electric circuit inspection is sent to the microprocessor after being isolated.
Preferably, the microprocessor, it is additionally operable to obtain in the battery pack by the voltage detecting circuit and often economizes on electricity
The voltage in pond, the voltage per batteries is sent to the battery management controller；
The battery management controller, be additionally operable to when the electric voltage over press that judges single battery or it is under-voltage when, control the single-unit
Switching off on branch road where battery.
Preferably, in addition to：, discharge switch, preliminary filling switchs and current-limiting resistance；
It is in parallel with the discharge switch after the preliminary filling switchs and current-limiting resistance series connection；
The N number of branch road being connected in parallel is connected with the discharge switch；
The battery management controller, for when controlling the power battery pack to be discharged, first closing the preliminary filling
Switch；The discharge switch is closed when the voltage loaded reaches the predetermined ratio of the total voltage of the power battery pack.
The present invention also provides a kind of electric automobile, includes the control system of described power battery pack, in addition to：Power electric
Pond group；
The control system, for controlling the discharge and recharge of power battery pack.
Compared with prior art, the present invention at least has advantages below：
The control system of power battery pack provided by the invention includes：Battery management controller and voltage detecting circuit.It is dynamic
Power battery pack includes N number of branch road in parallel, and each branch structure in parallel is identical, and each branch road includes the battery of M series connection
Group.Battery management controller is used for according to branch voltage height, the closing order that controlling brancher switchs, when battery power discharge,
Switch on the high branch road of control voltage first closes；When battery pack charges, the low branch switch of control voltage first closes.Due to
Each corresponding voltage detecting circuit of battery pack, therefore the control system can realize the complete detection to power battery pack,
Can be with each branch voltage of independent detection, each branch road of independent control.Such as when a certain branch road under-voltage or it is over-pressed when, can
So that the branch road to be disconnected, remaining branch road works on, without parking maintenance.The overall work of power battery pack can so be improved
Make efficiency.In addition, electrical measurement Management Controller can also be according to the height of voltage on branch road, in electric discharge or charging, control branch
The sequencing of road upper switch closure, realizes making full use of for electric energy.
Brief description of the drawings
, below will be to embodiment or existing in order to illustrate more clearly of the embodiment of the present application or technical scheme of the prior art
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments described in application, for those of ordinary skill in the art, on the premise of not paying creative work,
Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of power battery pack of the prior art provided by the invention；
Fig. 2 is the schematic diagram of the control system embodiment one of power battery pack provided by the invention；
Fig. 3 is the schematic diagram of the control system embodiment two of power battery pack provided by the invention；
Fig. 4 is the schematic diagram of the control system embodiment three of power battery pack provided by the invention；
Fig. 5 is the schematic diagram of the control system example IV of power battery pack provided by the invention.
Embodiment
In order that those skilled in the art more fully understand the present invention program, below in conjunction with the embodiment of the present invention
Accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only this
Invention part of the embodiment, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art exist
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
In recent years, electric automobile has obtained using more and more widely, in order to ensure the normal operation of electric automobile, adopts more
With power battery pack electric energy is provided for it.In order to provide sufficiently large capacity, ensure the normal operation of electric automobile, electrokinetic cell
Group is typically made up of multiple branch circuit parallel connections, and each branch road is typically in series by multiple battery packs.Single battery group is included very
Multiple batteries, it is specifically as follows multiple batteries and is cascaded, or multiple batteries connection in series-parallel is together.For example, one
Battery pack includes 6 batteries, and 6 batteries are cascaded.Can also a battery pack include 12 batteries, wherein it is every two economize on electricity
Pond is first connected in parallel, and is then cascaded again.
The number of battery pack in the number of branches that power battery pack specifically includes, and each branch road, and each battery
The number of battery in group, it can according to specific needs set, be not specifically limited in following examples of the present invention, only show
Meaning property explanation.
Power battery pack is controlled in the prior art, the general voltage and current detected on power battery pack main line,
The work of power battery pack is controlled according to the voltage and current of detection.I.e. when the voltage or electric current on discovery power battery pack main line
During more than corresponding preset value, the work of whole power battery pack can only be stopped.For example, during electric automobile is run,
When detecting voltage or electric current appearance exception on power battery pack main line, then the switch on power battery pack main line is disconnected, is stopped
The work of all battery packs in stopping power battery pack, so electric automobile be forced it is out of service.
And control circuit provided in an embodiment of the present invention, by setting voltage detecting circuit, realization pair to each battery pack
The voltage of each battery pack is detected, and then can be with the voltage on each branch road of independent detection, and by the branch voltage of detection
Send to battery management controller.Again by battery management controller according to the voltage detected, judging the voltage of each branch road is
No normal, if the electric voltage exception of a certain branch road, battery management controller can directly control the branch road to disconnect, and be stopped, and
Other branch roads can still keep normal work, for example, remaining branch road normally can power for electric automobile, electric automobile can continue
Operation, it is not necessary to parking maintenance.
Embodiment one
Referring to Fig. 2, the figure is the schematic diagram of electrokinetic cell set control system provided by the invention.
In order to facilitate understanding, node A and node B in following examples are the output end of power battery pack, that is, work as power
During battery power discharge, A connects electrical equipment or load with B.When power battery pack charges, A connects the charging of charge power supply with B
End.
The power battery pack can apply to electric automobile or hybrid vehicle, it is of course also possible to apply as needed
Occasion of the battery pack as driving source is needed in other, is not specifically limited in the present embodiment.
The control system for the power battery pack that the present embodiment provides, including：Battery management controller and voltage detecting circuit.
Power battery pack includes N number of branch road.
It should be noted that N number of branch road of power battery pack can be identical with structure, can also differ.Due to power electric
Each branch circuit parallel connection of pond group is load supplying together, in order to ensure that the voltage of each branch road is equal, general each branch road
Battery pack uses type and quantity all identical batteries.
N number of branch circuit parallel connection is together；The N is the integer more than or equal to 1.
Each branch road is cascaded including M battery pack, and the M is the integer more than or equal to 2.
Each corresponding voltage detecting circuit of the battery pack.
The voltage detecting circuit, for detecting the voltage of corresponding battery pack, and the voltage is sent to the battery
Management Controller.
The battery management controller, for obtaining the voltage on corresponding branch road according to the voltage of the battery pack, by right
The switch on the independent controlling brancher of the voltage on branch road is answered to close or disconnect.
It is understood that the number of branches N that power battery pack includes can be 1, or 2 and more than 2, this implementation
Do not limited specifically in example, but in order to which scheme describes conveniently, and those skilled in the art more fully understand what the application provided
Scheme, illustrated below so that N is 2 as an example.
The control system of the power battery pack includes following two branch roads：The branch road 200 of tie point 100 and second.
Battery management controller 300, the voltage for being sent according to each voltage detecting circuit obtain tie point 100
Voltage and the second branch road 200 on voltage；If voltage when power battery pack is discharged in tie point 100 is higher than second
Voltage on road 200, the switch closure in tie point 100 is controlled, treats the voltage and the second branch road 200 in tie point 100
On the voltage difference of voltage when being less than predetermined voltage, control the switch closure on the second branch road 200.
Battery management controller 300, if being additionally operable to voltage during power battery pack charging in tie point 100 higher than the
Voltage on two branch roads 200, the switch closure on the second branch road 200 is controlled, treats the voltage and the second branch road in tie point 100
When the voltage difference of voltage on 200 is less than predetermined voltage, the switch closure in tie point 100 is controlled.
As shown in Fig. 2 the power battery pack provided in the present embodiment includes two branch roads, the respectively He of tie point 100
Second branch road 200, two branch structures are identical, and two branch roads include the battery packs of two series connection, and two on each branch road
Individual battery pack is respectively the first battery pack 101 and the second battery pack 102.
As shown in Fig. 2 in the first battery pack 101 and the second battery pack 102 in tie point 100, set respectively
Corresponding first voltage detection circuit 103 and second voltage detection circuit 104 are put.First voltage detection circuit 103 is used for real
When detect the voltage of the first battery pack 101, second voltage detection circuit 104 is used for the voltage for detecting the second battery pack 102 in real time.
First voltage detects circuit 103 and second voltage detection circuit 104, will detect the voltage of the first obtained battery pack 101 respectively
With the voltage of the second battery pack 102, battery management controller 300 is sent to.Similarly, in first on the second branch road 200
In the battery pack 202 of battery pack 201 and second, voltage detecting circuit is also correspondingly provided with, for detecting the second branch road 200 in real time
On the first battery pack 201 and the second battery pack 202 voltage, and the voltage detected is sent to battery management controller
300。
It should be noted that voltage detecting circuit can use the chips such as AFE(analog front end) (AFE, Analog Front End)
To realize.Voltage detecting circuit can gather the voltage of multiple batteries simultaneously, and can be converted to the voltage signal of collection
Data signal is sent to battery management controller.
In order that Fig. 2 apparent simplicity of display is obtained, corresponding to the voltage detecting circuit of the second branch road 200, and battery
Management Controller is not drawn.But in fact, corresponding to the voltage detecting circuit and battery management controller of the second branch road, with
Voltage detecting circuit on one branch road is identical with the structure of battery management controller.
The battery management controller 300, with the voltage of each battery pack sended over according to voltage detecting circuit, obtain
The voltage in respective branch is taken, and according to the magnitude of voltage on branch road, the behaviour that the switch on each branch road is closed or disconnected
Make.
Battery management controller 300 receives the voltage for the first battery pack 101 that first voltage detection circuit 103 detects,
The voltage of the second battery pack 102 detected with second voltage detection circuit 104., can be right inside battery management controller 300
The battery voltage that voltage detecting circuit 103 and 104 detects carries out A/D conversions, the analog quantity voltage conversion that will be collected
For digital quantity, so that internal system carries out data processing.
Battery management controller 300 can also be when receiving voltage detects the voltage that circuit 103 and 104 is sent, and record should
ID corresponding to voltage detecting circuit 103 and 104, that is, record the voltage that first voltage detection circuit 103 is sent and correspond to the first electricity
Tie point 100 where pond group 101, and the first battery pack 101, similarly, record second voltage detection circuit 104 are sent
Voltage corresponds to the second battery pack 102, and the tie point 100 at the place of the second battery pack.And battery management controller
300 can also sum to the voltage of each battery pack on the same branch road that detects, and then obtain the voltage of the branch road.It is i.e. electric
Pond Management Controller 300 can be by the voltage progress corresponding to the first battery pack 101 of tie point 100 and the second battery pack 102
Summation, obtains the magnitude of voltage of tie point 100.
Battery management controller 300 is judged the voltage of each branch road after the voltage of each branch road is got, and is judged each
Whether the voltage of individual branch road there is over-pressed or under-voltage phenomenon, if finding, over-pressed or under-voltage phenomenon, battery occurs in a certain branch road
Management Controller 300 can directly control switching off on the branch road, stop the work of the branch road.And other voltages are in normal
It the branch road of scope, can work on, be that the operation of electric automobile is powered.
In addition, battery management controller 300 can be also compared to the voltage for each branch road tried to achieve, work as battery power discharge
When, the switch on the high branch road of the control voltage of battery management controller 300 first closes, after the switch on the low branch road of control voltage
Closure, that is, make it that branch road where the high battery pack of voltage is first discharged, discharged after branch road where the low battery pack of voltage.
When battery pack charges, the switch on the low branch road of the control voltage of battery management controller 300 first closes, control electricity
Closed after pressing the switch on high branch road, that is, make it that branch road where the low battery pack of voltage is first charged, the high battery of voltage
Charged after branch road where group.
As shown in Fig. 2 the voltage of two branch roads is compared, if the voltage of tie point 100 is higher than the second branch road
200 voltage, when power battery pack is discharged, battery management controller 300 first closes the switch for controlling tie point 100,
Control the battery pack in tie point 100 first to be discharged, with the progress of discharge process, the voltage of tie point 100 by
Gradually reduce, when the voltage difference between the voltage on the voltage in tie point 100 and the second branch road 200 is less than predetermined voltage,
Battery management controller controls the switch closure on the second branch road 200, i.e., by the battery pack input electric discharge work on the second branch road 200
In work.
Battery management controller 300 controls the sequencing of each branch road upper switch closure, can prevent each branch road it
Between form loop.For example, if the voltage of tie point 100 is higher than the voltage of the second branch road 200, if by opening on two branch roads
Pass is closed at, it will the situation that tie point 100 is charged for the battery pack on the second branch road 200 occurs.It can so produce
Raw waste of energy.During electric automobile during traveling, the electric energy of all battery packs of power battery pack can not be completely used for for
The operation of electric automobile provides electric energy, and a portion electric energy for the relatively low battery pack of part electricity by for being charged.
Similarly, if the voltage in detection tie point 100 fills higher than the voltage on the second branch road 200 to battery pack
When electric, battery management controller 300 controls the switch on the second branch road 200 first to close.I.e. first to the battery on the second branch road 200
Group is charged, and with the progress of charging process, the voltage on the second branch road 200 will gradually increase, and treat in tie point 100
When the voltage difference between voltage on voltage and the second branch road 200 is less than predetermined voltage, then control the switch in tie point 100
Closure, the battery pack in tie point 100 is charged.
In addition, in the present invention, the switch on each branch road can be relay, or contactor, or its
The switching device of his type, is not specifically limited herein.
The control system for the power battery pack that the present embodiment provides, due to the corresponding voltage detecting electricity of each battery pack
Road, therefore the control system can realize the complete detection to power battery pack, can be independent with each branch voltage of independent detection
Control each branch road.Such as when a certain branch road under-voltage or it is over-pressed when, the branch road can be disconnected, remaining branch road continue work
Make, without parking maintenance.The overall operating efficiency of power battery pack can so be improved.In addition, electrical measurement Management Controller is also
, in electric discharge or charging, the sequencing of controlling brancher upper switch closure, it can be realized according to the height of voltage on branch road
Electric energy makes full use of.
Embodiment two：
Referring to Fig. 3, the figure is a kind of schematic diagram of electrokinetic cell set control system provided by the invention.The power battery pack
Control system still further comprises：First current sensor 105 and the second current sensor 205.
Tie point 100 is provided with the first current sensor 105, and the second branch road 200 is provided with the second current sensor
205。
First current sensor 105, for detecting the electric current of the tie point 100, by the tie point 100
Electric current be sent to the battery management controller 300；
Second current sensor 205, for detecting the circuit of second branch road 200, by second branch road 200
Electric current be sent to the battery management controller 300；
The battery management controller 300, for when the power battery pack exits work, judging the tie point
When the current absolute value of 100 current absolute value and the second branch road 200 is respectively less than the first predetermined current value, tie point is controlled
The switch on switch and the second branch road 200 on 100 disconnects.
As shown in figure 3, the electric current in the first current sensor 105 detection tie point 100, the second current sensor 205
Detect the electric current on the second branch road 200.First current sensor 105 and the second current sensor 205 will detect two obtained
The electric current of branch road, it is sent to battery management controller 300.
When power battery pack exits work, i.e., when the main line of power battery pack switches off, the switch of tie point
The switch S2 of S1 and the second branch road is still in closure state.Because main line switch is already off, and tie point S1 and second
Branch road S2 switch still closes, and so, the branch road 200 of tie point 100 and second will form the loop of a closure.
Now, the first current sensor 105 and the electric current of the second current sensor 205 detection are the electricity of the closed-loop path
Stream, but in the closed-loop path, may be higher due to the voltage of battery pack on a certain branch road, the voltage of battery pack on another branch road
It is relatively low, and there is the situation that the battery pack on a branch road is the charging of another branched battery group.Battery pack i.e. on a branch road
Battery pack in discharge condition, another branch road is in charged state.Therefore, the first current sensor 105 and the second electricity
The electric current that flow sensor 205 detects is although equal in magnitude, but in the opposite direction.
, may be because on each branch road if directly disconnecting the switch on each branch road when power battery pack exits work
Still there is larger electric current, and arcing occur, produce the phenomenon of electric spark.The electric current on each branch road is carried out by current sensor
Detection, after the absolute value of the electric current on each branch road is respectively less than the first predetermined current value, then disconnects the switch on each branch road, can prevent
The only generation of dangerous phenomenon.
When the circuitry number of power battery pack is more than or equal to 3, situation will be increasingly complex, in fact it could happen that higher certain of voltage
Several branch roads are the situation that other branch roads are charged.
The control system of power battery pack sets a current sensor on each branch road.
The current sensor, the battery management control is sent to for the electric current of detection branch, and by the electric current of detection
Device processed.
The battery management controller, for when the N is more than or equal to 3, work to be exited in the power battery pack
When, and when the absolute value of electric current is respectively less than the second predetermined current value on branch road, according to electric current on branch road absolute value from small to large
Order disconnect switch on corresponding branch road successively.
When the circuitry number of power battery pack is more than or equal to 3, it is due to being likely to occur certain higher several branch road of voltage
The situation of other branch roads charging, so, the electric current that current sensor detects on each branch road is in addition to the possible difference in direction, electricity
The size of stream may also be different.Therefore, battery management controller detects electric current on obtained each branch road according to current sensor,
When the electric current on each branch road is respectively less than the second predetermined current value, according still further to each branch current absolute value from small to large suitable
Sequence, the switch on corresponding branch road is disconnected successively.Disconnect, prevented because of the remaining electricity in branch road after ensureing the larger branch road of electric current
Flow larger, the dangerous phenomenon such as generation arcing, generation electric spark.
When power battery pack is normally powered for electric automobile, it is also possible to occur, because a certain battery pack breaks down, causing
The increased situation of current anomaly of a certain branch road.
Battery management controller, when being additionally operable to judge that the electric current of branch road exceedes predetermined current value, control on corresponding branch road
Switch off.
A certain battery pack breaks down i.e. on due to a certain branch road, and when causing the current anomaly increase on the branch road,
Battery management controller can judge that certain branch current value exceedes predetermined current value according to the testing result of current sensor,
Switching off on the branch road is controlled, prevents the exception due to the branch current, shadow is produced to the overall work of power battery pack
Ring.
Further increase current sensor in the control system of power battery pack, can be in power battery pack normal work
When, detect the electric current on each branch road, and the abnormal branch road of turn-off current in time.Also can be examined when power battery pack exits work
The electric current surveyed on each branch road, after the electric current on each branch road is less than predetermined value, disconnect the switch of the branch road.Prevent larger in electric current
When, the switch of the branch road is disconnected, arcing occurs, produces the dangerous phenomenons such as electric spark.
Embodiment three：
Referring to Fig. 4, the figure is a kind of schematic diagram of electrokinetic cell set control system embodiment three provided by the invention.This is dynamic
Power battery set control system still further comprises：Microprocessor.
Each corresponding microprocessor of the battery pack.
The microprocessor, it is described for the ID of itself and the detection of corresponding voltage detecting circuit voltage to be transmitted to
Battery management controller.
The battery management controller, for obtaining the voltage on corresponding branch road according to the ID and the voltage received,
One-to-one relationship be present with branch road in the ID.
As shown in figure 4, continue to include two branch roads with power battery pack, and each branch road includes entering exemplified by two battery packs
Row is introduced.Specific implementation and operation principle corresponding to a branch road are only introduced below, and another branch road is identical, no
Repeat again.
The corresponding first microprocessor 106 of first battery pack 101, corresponding second microprocessor 107 of the second battery pack 102.
First voltage detects circuit 103 and sends the voltage that detection obtains to first microprocessor 106, second voltage detection
Circuit 104 sends the voltage that detection obtains to the second microprocessor 107.The microprocessor 107 of first microprocessor 106 and second
The voltage that the ID of itself and corresponding voltage detecting circuit are sent, send to battery management controller 300.Due to each
One-to-one relation be present between the ID and branch road of microprocessor itself, therefore, the voltage of a certain battery pack goes out if detecting
It is now abnormal, sent according to each microprocessor to the ID of battery management controller 300, you can judge abnormal battery pack place
Branch road, battery management controller controls switching off on the branch road.
Wherein, microprocessor can be MCU, single-chip microcomputer or DSP, not limit specifically.For example, when microprocessor uses
During MCU, it can be communicated between MCU and battery management controller by CAN.
The electrokinetic cell set control system can also further include：Voltage isolated location.
The voltage isolated location is connected between the voltage detecting circuit and the microprocessor, for by the electricity
The voltage of pressure detection electric circuit inspection is sent to the microprocessor after being isolated.
As shown in figure 4, continue to be introduced so that a branch road includes two battery packs as an example.The correspondence of first battery pack 101
First voltage isolated location 108,102 corresponding second voltage isolated location 109 of the second battery pack.Voltage isolated location is connected to electricity
Between pressure detection circuit and microprocessor, i.e., first voltage isolated location 108 is arranged at first microprocessor 106 and first voltage
Between detecting circuit 103, second voltage isolated location 109 is arranged at the second microprocessor 107 and second voltage detection circuit 104
Between.
Voltage isolated location is used to be isolated the voltage that voltage detecting circuit detects to obtain, that is, filters out voltage detecting electricity
Various clutters in the voltage that road sends over, after converting voltages into standard signal, retransmit to microprocessor.
The microprocessor, it may also be used for the electricity in the battery pack per batteries is obtained by the voltage detecting circuit
Pressure, the battery management controller is sent to by the voltage of every batteries.
The battery management controller, be additionally operable to when the electric voltage over press that judges single battery or it is under-voltage when, control the single-unit
Branch road where battery switches off.
Voltage detecting circuit can also obtain the voltage per batteries in battery pack, and the voltage of every batteries is sent to micro-
The ID of itself and the single battery voltage detected are sent to battery management controller by processor, microprocessor, wherein, micro- place
The ID and branch road for managing device have one-to-one relation.
Correspondingly, battery management controller is judged the voltage of single battery, if the electric voltage over press of single battery or
When person is under-voltage, then battery management controller can be sent according to microprocessor ID finds the branch road where the single battery, and control
Make switching off for the branch road where the single battery.
Microprocessor is set up in the control system of power battery pack, the burden of battery management controller can be mitigated.I.e.
Battery voltage and the battery pack institute that voltage detecting circuit sends over need not be established in battery management controller internal system
Corresponding relation between branch road.The self ID and voltage detecting that the direct storage microprocessor of battery management controller sends over
The result that electric circuit inspection obtains, you can the branch road according to where the testing result of a certain battery pack finds the battery pack.
Example IV：
Referring to Fig. 5, the figure is a kind of schematic diagram of electrokinetic cell set control system provided by the invention.The power battery pack
Control system still further comprises：Discharge switch S3, preliminary filling switchs S4 and current-limiting resistance R.
It is in parallel with the discharge switch S3 after preliminary filling switchs S4 and current-limiting resistance the R series connection.
The N number of branch road being connected in parallel is connected with the discharge switch S3.
The battery management controller 300, for when controlling the power battery pack to be discharged, first closing described pre-
Fill switch S4；When the voltage loaded reaches the predetermined ratio of the total voltage of the power battery pack, close the electric discharge and open
Close S3.
As shown in figure 5, power battery pack comes into operation moment, if directly closing discharge switch S3, will produce it is larger just
Beginning electric current, and larger initial current will produce larger impact to system load equipment.
And in the present embodiment, when power battery pack is come into operation, battery management controller 300 controls preliminary filling switchs S4
First close, because preliminary filling switchs S4 connects with current-limiting resistance R, current-limiting resistance can by it is initial when excessive electric current limit
System, system equipment is protected, prevents load equipment from being impacted by larger current.
By closing the branch road where preliminary filling switchs S4, electric energy is provided for load, the voltage for waiting to load reaches power electric
During the predetermined ratio of the total voltage of pond group, that is, illustrate that discharge current basically reaches steadily.Now, battery management controller 300 is controlled
Discharge switch S3 closures processed, after discharge switch S3 is closed, the branch road where it connects short-circuit preliminary filling switchs S4 and current-limiting resistance R
Branch road, that is, cause current-limiting resistance R and preliminary filling switchs S3 to exit use, power battery pack starts regular picture.
The concrete numerical value of predetermined ratio is not limited in the present embodiment specifically, can be set according to practical application scene, example
It such as could be arranged to 90%.
In addition, control system provided by the invention, can also be carried out to the temperature of each battery pack in power battery pack
Detection, when finding that a certain battery pack temperature is higher than preset temperature, battery management controller is by the branch where finding the battery pack
Road, and switching off on the branch road is controlled, stop the work of the branch road.
A kind of control system of the power battery pack provided based on above example, the embodiment of the present invention also provide a kind of electricity
Electrical automobile, the electric automobile include the control system for the power battery pack that above example provides, in addition to：Power battery pack；
The control system, for controlling the discharge and recharge of power battery pack.
The electric automobile can utilize control system to realize comprehensive control to power battery pack, when certain of power battery pack
One branch road exist problem need disconnect when, other branch roads can continue as electric automobile power supply, can so ensure electric automobile
With driving source, can continue to travel, and must parking maintenance.
The above described is only a preferred embodiment of the present invention, any formal limitation not is made to the present invention.Though
So the present invention is disclosed above with preferred embodiment, but is not limited to the present invention.It is any to be familiar with those skilled in the art
Member, without departing from the scope of the technical proposal of the invention, all using the methods and technical content of the disclosure above to the present invention
Technical scheme makes many possible changes and modifications, or is revised as the equivalent embodiment of equivalent variations.Therefore, it is every without departing from
The content of technical solution of the present invention, the technical spirit according to the present invention is to any simple modification made for any of the above embodiments, equivalent
Change and modification, still fall within technical solution of the present invention protection in the range of.
Claims (10)
- A kind of 1. control system of power battery pack, it is characterised in that including：Battery management controller and voltage detecting circuit；Power battery pack includes N number of branch road；N number of branch circuit parallel connection is together；The N is the integer more than or equal to 1；Each branch road is cascaded including M battery pack, and the M is the integer more than or equal to 2；Each corresponding voltage detecting circuit of the battery pack；The voltage detecting circuit, for detecting the voltage of corresponding battery pack, and the voltage is sent to the battery management Controller；The battery management controller, for obtaining the voltage on corresponding branch road according to the voltage of the battery pack, by correspondingly propping up Switch closure or disconnection on the independent controlling brancher of voltage on road.
- 2. the control system of power battery pack according to claim 1, it is characterised in that the power battery pack is at least wrapped Include following two branch roads：Tie point and the second branch road；The battery management controller, the voltage for being sent according to each voltage detecting circuit are obtained in tie point Voltage on voltage and the second branch road；If the voltage during power battery pack electric discharge in the tie point is higher than second Voltage on road, control the switch in the tie point to close, treat the voltage on the voltage and the second branch road in tie point Voltage difference when being less than predetermined voltage, control the switch closure on the second branch road；The battery management controller, if voltage when being additionally operable to the power battery pack charging in the tie point is higher than Voltage on second branch road, the switch closure on second branch road is controlled, is treated on the voltage and the second branch road in tie point The voltage difference of voltage when being less than predetermined voltage, control the switch closure in tie point.
- 3. the control system of power battery pack according to claim 2, it is characterised in that the tie point is provided with first Current sensor, second branch road are provided with the second current sensor；First current sensor, for detecting the electric current of the tie point, the electric current of the tie point is sent to The battery management controller；Second current sensor, for detecting the circuit of second branch road, the electric current of second branch road is sent to The battery management controller；The battery management controller, for when the power battery pack exits work, judging the electric current of the tie point When the current absolute value of absolute value and the second branch road is respectively less than the first predetermined current value, the switch and second in tie point is controlled Switch on branch road disconnects.
- 4. the control system of power battery pack according to claim 1, it is characterised in that also include：Current sensor；A current sensor is set on each branch road；The current sensor, the battery management controller is sent to for the electric current of detection branch, and by the electric current of detection；The battery management controller, for when the N be more than or equal to 3 when, when the power battery pack exits work and When the absolute value of electric current is respectively less than the second predetermined current value on branch road, according to the absolute value order from small to large of electric current on branch road The switch on corresponding branch road is disconnected successively.
- 5. the control system of the power battery pack according to claim 3 or 4, it is characterised in that the battery management control Device, when being additionally operable to judge that the electric current of branch road exceedes predetermined current value, control switching off on corresponding branch road.
- 6. the control system of power battery pack according to claim 1, it is characterised in that also include：Microprocessor；Each corresponding microprocessor of the battery pack；The microprocessor, for the ID of itself and the detection of corresponding voltage detecting circuit voltage to be transmitted into the battery Management Controller；The battery management controller, it is described for obtaining the voltage on corresponding branch road according to the ID and the voltage received One-to-one relationship be present with branch road in ID.
- 7. the control system of power battery pack according to claim 6, it is characterised in that also include：Voltage isolated location；The voltage isolated location is connected between the voltage detecting circuit and the microprocessor, for the voltage to be examined The voltage of slowdown monitoring circuit detection is sent to the microprocessor after being isolated.
- 8. the control system of power battery pack according to claim 6, it is characterised in that the microprocessor, be additionally operable to Voltage in the battery pack per batteries is obtained by the voltage detecting circuit, the voltage per batteries is sent to The battery management controller；The battery management controller, be additionally operable to when the electric voltage over press that judges single battery or it is under-voltage when, control the single battery Switching off on the branch road of place.
- 9. the control system of power battery pack according to claim 1, it is characterised in that also include：, it is discharge switch, pre- Fill switch and current-limiting resistance；It is in parallel with the discharge switch after the preliminary filling switchs and current-limiting resistance series connection；The N number of branch road being connected in parallel is connected with the discharge switch；The battery management controller, for when controlling the power battery pack to be discharged, first closing the preliminary filling switchs； The discharge switch is closed when the voltage loaded reaches the predetermined ratio of the total voltage of the power battery pack.
- 10. a kind of electric automobile, it is characterised in that include the control system of the power battery pack described in claim any one of 1-9 System, in addition to：Power battery pack；The control system, for controlling the discharge and recharge of power battery pack.
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| CN201710625217.5A CN107554323A (en) | 2017-07-27 | 2017-07-27 | The control system and electric automobile of a kind of power battery pack |
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| CN201710625217.5A CN107554323A (en) | 2017-07-27 | 2017-07-27 | The control system and electric automobile of a kind of power battery pack |
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| CN109004295A (en) * | 2018-07-24 | 2018-12-14 | 武汉力唯新能源科技有限公司 | Battery pack management control system and battery pack system for electric vehicle |
| CN109782193A (en) * | 2018-12-13 | 2019-05-21 | 惠州市亿能电子有限公司 | A kind of method of discrimination of multiple branch circuit battery circuit open circuit |
| CN110474395A (en) * | 2019-08-27 | 2019-11-19 | 常州格力博有限公司 | Electric system |
| CN110696623A (en) * | 2019-10-29 | 2020-01-17 | 昆山宝创新能源科技有限公司 | Vehicle, battery system and detection method thereof |
| CN111953030A (en) * | 2019-05-16 | 2020-11-17 | 珠海格力电器股份有限公司 | Double-battery control system and method and mobile terminal |
| CN112034361A (en) * | 2019-06-04 | 2020-12-04 | 罗伯特·博世有限公司 | Method for detecting errors in an electrical energy storage system |
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| CN109782193A (en) * | 2018-12-13 | 2019-05-21 | 惠州市亿能电子有限公司 | A kind of method of discrimination of multiple branch circuit battery circuit open circuit |
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| CN111953030A (en) * | 2019-05-16 | 2020-11-17 | 珠海格力电器股份有限公司 | Double-battery control system and method and mobile terminal |
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| CN110474395A (en) * | 2019-08-27 | 2019-11-19 | 常州格力博有限公司 | Electric system |
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| CN112078805A (en) * | 2020-08-25 | 2020-12-15 | 飞的科技有限公司 | Electric drive system and electric energy drive equipment |
| CN112644285A (en) * | 2020-11-09 | 2021-04-13 | 湖南中车智行科技有限公司 | Intelligent rail high-voltage power supply control system and method thereof |
| CN112659969A (en) * | 2020-12-01 | 2021-04-16 | 湖北亿纬动力有限公司 | Double-branch power battery control system and method |
| CN112531750A (en) * | 2020-12-04 | 2021-03-19 | 薛飞 | Energy storage device management system, method and device |
| CN112531752B (en) * | 2020-12-04 | 2023-12-12 | 薛飞 | Energy storage device management system, method and device |
| CN112531750B (en) * | 2020-12-04 | 2023-12-12 | 薛飞 | Energy storage device management system, method and device |
| CN112531752A (en) * | 2020-12-04 | 2021-03-19 | 薛飞 | Energy storage device management system, method and device |
| WO2023016322A1 (en) * | 2021-08-09 | 2023-02-16 | 中车资阳机车有限公司 | Parallel suspension control method for multi-branch power battery system |
| CN113533892A (en) * | 2021-08-13 | 2021-10-22 | 广东电网有限责任公司 | Power supply control circuit of relay protection tester and relay protection tester |
| CN113968169A (en) * | 2021-10-25 | 2022-01-25 | 上海洛轲智能科技有限公司 | Battery control circuit, battery control method, vehicle and readable storage medium |
| CN114336866A (en) * | 2021-12-31 | 2022-04-12 | 联想(北京)有限公司 | Battery control method and electronic equipment |
| CN115891660A (en) * | 2023-03-10 | 2023-04-04 | 宁德时代新能源科技股份有限公司 | Battery replacement connector detection method, device, circuit, electronic equipment and storage medium |
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