CN110015126A - Protection control method, the system of electric car and wherein power battery pack - Google Patents
Protection control method, the system of electric car and wherein power battery pack Download PDFInfo
- Publication number
- CN110015126A CN110015126A CN201710710511.6A CN201710710511A CN110015126A CN 110015126 A CN110015126 A CN 110015126A CN 201710710511 A CN201710710511 A CN 201710710511A CN 110015126 A CN110015126 A CN 110015126A
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- Prior art keywords
- battery pack
- power battery
- voltage
- preset
- limit value
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
Abstract
The invention discloses a kind of electric car and wherein protection control method, the system of power battery pack; electric car includes battery manager BMS, two-way inversion charging/discharging type electric machine controller VTOG and entire car controller; method is the following steps are included: if entire car controller receives the message information of the status information including at least power battery pack of BMS transmission in the first preset time; then entire car controller communicates the status information for obtaining power battery pack by carrying out with BMS, and then VTOG with entire car controller by being communicated to obtain the status information of power battery pack；Entire car controller and/or VTOG judge whether to correspond to according to the status information of power battery pack respectively forbids vehicle and/or VTOG to carry out charge and discharge to power battery pack, to carry out second protection to power battery pack when BMS breaks down.Thereby, it is possible to more effectively prevent power battery pack because overcharge or due to over-discharge caused by damage, improve the safety of power battery pack charge and discharge.
Description
Technical field
The present invention relates to electric car fields, and in particular to the protection controlling party of power battery pack in a kind of electric car
The Protection control system and a kind of electric car of power battery pack in method, a kind of electric car.
Background technique
The BMS (Battery Management System, battery management system) of electric car is connection onboard power electricity
The important tie in pond and electric car mainly realizes that function includes:
(1) SOC (State of Charge, state-of-charge) for accurately estimating power battery pack, so that SOC maintains conjunction
In the range of reason, the damage caused by battery as overcharging or overdischarging is prevented, while can forecast electric car energy storage at any time
The dump energy of battery or the state-of-charge of energy-storage battery.
(2) working condition of dynamic monitoring power battery pack acquires power battery that is, in battery charge and discharge process in real time
End voltage and temperature, the charging and discharging currents and battery pack total voltage of each battery in group prevent battery from overcharge or mistake occurs
Electric discharge phenomena.Battery condition can be provided in time simultaneously, determine problematic battery, keep whole group battery operation reliability and
High efficiency, in order to realize remaining capacity estimation.
(3) equilibrium is carried out between single battery, battery pack, and each battery in battery pack is made all to reach balanced consistent shape
State.It is battery balanced to be generally divided into active equalization, passive equilibrium.The BMS to have put goods on the market at present, mostly using passive equal
Weighing apparatus.Balancing technique is the key technology for the battery management system (bms) that the current world is endeavouring research and development.
However, when seriously overcharging occurs in power battery or when over-discharge, the injury of unrepairable can be caused to battery, even
The safety accidents such as leakage, on fire are caused, so having to carry out the voltage of battery pack in electric car use process stringent
Protection.But in the case where BMS failure etc. is special, the safety protection control to battery voltage can be lost, battery is caused
The damage of unrepairable.
Summary of the invention
The present invention is directed to solve one of the technical problem in above-mentioned technology at least to a certain extent.For this purpose, of the invention
First purpose is to propose a kind of protection control method of power battery pack in electric car.This method can occur in BMS
Second protection is carried out to power battery pack when failure, and then can more effectively prevent power battery pack because overcharging or over-discharge due to causes
Damage, improve the safety of power battery pack charge and discharge.
Second object of the present invention is to propose a kind of Protection control system of power battery pack in electric car.
Third object of the present invention is to propose a kind of electric car.
In order to achieve the above objectives, first aspect present invention embodiment proposes a kind of guarantor of power battery pack in electric car
Control method is protected, the electric car includes battery manager BMS, two-way inversion charging/discharging type electric machine controller VTOG
(Vehicleto grid, vehicle to power grid) and entire car controller, the described method comprises the following steps: the entire car controller is sentenced
Break and whether receive the message information that the BMS is sent in the first preset time, wherein the message information includes at least dynamic
The status information of power battery pack；If the entire car controller receives what the BMS was sent in first preset time
Message information, then the entire car controller is with the BMS by being communicated to obtain the status information of the power battery pack,
And then the VTOG with the entire car controller by being communicated to obtain the status information of the power battery pack, wherein
The status information of the power battery pack includes single battery in the total voltage and the power battery pack of the power battery pack
Voltage；The entire car controller judges whether to forbid vehicle to the power electric according to the status information of the power battery pack
Pond group carries out charge and discharge, and/or, the VTOG judges whether to forbid the VTOG according to the status information of the power battery pack
Charge and discharge are carried out to the power battery pack, to carry out second protection to the power battery pack when the BMS breaks down.
The protection control method of power battery pack in electric car according to an embodiment of the present invention, by entire car controller and
VTOG obtains the status information of power battery pack, and then entire car controller judges whether to prohibit according to the status information of power battery pack
Only vehicle carries out charge and discharge to power battery pack, and VTOG judges whether to forbid VTOG to dynamic according to the status information of power battery pack
Power battery pack carries out charge and discharge, and to carry out second protection to power battery pack when BMS breaks down, thereby, it is possible to more effective
Prevent power battery pack because overcharge or due to over-discharge caused by damage, improve the safety of power battery pack charge and discharge.
In order to achieve the above objectives, second aspect of the present invention embodiment proposes a kind of guarantor of power battery pack in electric car
Protect control system, comprising: battery manager BMS；Entire car controller, the entire car controller judge be in the first preset time
The no message information for receiving the status information including at least power battery pack that the BMS is sent, if it is, by with institute
It states BMS to be communicated to obtain the status information of the power battery pack, and is sentenced according to the status information of the power battery pack
It is disconnected that vehicle whether is forbidden to carry out charge and discharge to the power battery pack, with when the BMS breaks down to the power battery
Group carries out second protection, wherein the status information of the power battery pack includes the total voltage of the power battery pack and described
The voltage of single battery in power battery pack；Two-way inversion charging/discharging type electric machine controller VTOG, is obtained in the entire car controller
After the status information for taking the power battery pack, the VTOG is obtained described dynamic by being communicated with the entire car controller
The status information of power battery pack, and judged whether to forbid VTOG to the power electric according to the status information of the power battery pack
Pond group carries out charge and discharge, to carry out second protection to the power battery pack when the BMS breaks down.
The Protection control system of power battery pack in electric car according to an embodiment of the present invention, by entire car controller and
VTOG obtains the status information of power battery pack, and then is according to the judgement of the status information of power battery pack by entire car controller
It is no that vehicle is forbidden to carry out charge and discharge to power battery pack, and judged whether by VTOG according to the status information of power battery pack
VTOG is forbidden to carry out charge and discharge to power battery pack, to carry out second protection to power battery pack when BMS breaks down, by
This, can more effectively prevent power battery pack because overcharge or due to over-discharge caused by damage, improve power battery pack charge and discharge
Safety.
Further, the invention proposes a kind of electric cars comprising power battery pack in above-mentioned electric car
Protection control system
The electric car of the embodiment of the present invention passes through full-vehicle control using the Protection control system of above-mentioned power battery pack
Device and VTOG obtain the status information of power battery pack, and then are sentenced by entire car controller according to the status information of power battery pack
It is disconnected that vehicle whether is forbidden to carry out charge and discharge to power battery pack, and judged by VTOG according to the status information of power battery pack
VTOG whether is forbidden to carry out charge and discharge to power battery pack, to carry out second protection to power battery pack when BMS breaks down,
Thereby, it is possible to more effectively prevent power battery pack because overcharge or due to over-discharge caused by damage, improve power battery pack charge and discharge
Safety.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 is the flow chart of the protection control method of power battery pack in electric car according to an embodiment of the present invention；
Fig. 2 is the communication topology of the Protection control system of power battery pack in electric car according to an embodiment of the present invention
Figure；
Fig. 3 is the stream of the protection control method of power battery pack in electric car accord to a specific embodiment of that present invention
Cheng Tu；
Fig. 4 is the protection control method of power battery pack in the electric car of another specific embodiment according to the present invention
Flow chart；
Fig. 5 is the block diagram of the Protection control system of power battery pack in electric car according to an embodiment of the present invention；
Fig. 6 is the block diagram of electric car according to an embodiment of the present invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings describe the embodiment of the present invention electric car and wherein the protection control method of power battery pack,
System.
Fig. 1 is the process of the protection control method of power battery pack in electric car according to an embodiment of the invention
Figure.
In an embodiment of the present invention, referring to fig. 2, electric car includes battery manager BMS, two-way inversion charging/discharging type
Electric machine controller VTOG and entire car controller, and can pass through between entire car controller and BMS, between entire car controller and VTOG
CAN (Controller Area Network, controller local area network) carries out two-way communication.
As shown in Figure 1, in electric car power battery pack protection control method the following steps are included:
S101, entire car controller judge the message information that BMS transmission whether is received in the first preset time.
Wherein, message information includes at least the status information of power battery pack；The value of first preset time can be 4.5
~5.5s, such as 5s.
S102, if whether receiving the message information of BMS transmission in the first preset time, entire car controller if, passes through
Communicated and obtained by being communicated with VTOG the status information of power battery pack with BMS, so VTOG by with it is whole
Vehicle controller is communicated to obtain the status information of power battery pack.
Wherein, the status information of power battery pack includes single battery in the total voltage and power battery pack of power battery pack
Voltage.
Specifically, when BMS communicates normal with entire car controller, BMS can sample the total voltage and power of power battery pack
The voltage of single battery in battery pack, and entire car controller is sent it to, and then VTOG can be communicated with entire car controller
The voltage of single battery in total voltage and power battery pack to obtain power battery pack.
S103, entire car controller judge whether to forbid filling power battery pack according to the status information of power battery pack
Electric discharge, and/or, VTOG judges whether that VTOG is forbidden to carry out charge and discharge to power battery pack according to the status information of power battery pack
Electricity, to carry out second protection to power battery pack when BMS breaks down.
Wherein, vehicle carries out charging to power battery pack and includes at least vehicle to power battery pack feedback electric energy, vehicle pair
Power battery pack electric discharge includes at least load (such as car light, multimedia) power supply of the power battery pack on vehicle；VTOG is to dynamic
Power battery pack carries out charging and includes at least power grid/charging pile to power battery pack charging, and VTOG discharges at least to power battery pack
It powers including power battery pack to external equipment (such as electric car, off-board electrical equipment), and vehicle is to power battery pack
Charge and discharge are carried out by vehicle control unit controls, VTOG carries out charge and discharge to power battery pack and controlled by VTOG.
In an embodiment of the present invention, when BMS communicates normal with entire car controller, BMS can also be sent out to entire car controller
Send voltage rating (or platform voltage upper limit value and lower limit value), pre-set upper voltage limit value and the lower limit value, pre- of power battery pack
If charging voltage upper limit value and lower limit value, preset first monomer voltage threshold value and preset second comonomer voltage threshold.
Wherein, preset first monomer voltage threshold value (such as can be 4V) is greater than preset second comonomer voltage threshold and (such as can be
2V).It is appreciated that above-mentioned parameter preset need to only be sent once.
It should be noted that the upper limit value V in platform voltage sectionIt is flatMax and lower limit value VIt is flatMin can be by VTOG according to BMS
The voltage rating V of the power battery pack of transmissionVolumeIt is calculated, for example, VIt is flatMax=VVolume* 3.7V/3.2V, VIt is flatMin=VVolume*2.2/
3.2, wherein a*3.7V is the upper voltage limit of single battery, and a*3.2V is that all single batteries are averaged in power battery pack
Voltage, a*2.2V are the voltage lower limit values of single battery, and a is positive value, and value can be depending on specific single battery.
Optionally, above-mentioned parameter preset can also be stored in entire car controller.
Specifically, if BMS is communicated normally with entire car controller, entire car controller and VTOG get BMS transmission
The status information of power battery pack, and BMS breaks down the charge and discharge control that cannot achieve to power battery pack, then it can be by whole
Vehicle controller and/or VTOG carry out charge and discharge control to power battery pack.
In some embodiments of the invention, referring to Fig. 3, firstly, entire car controller and/or VTOG judge power battery pack
Total voltage whether be greater than pre-set upper voltage limit value, and judge whether the total voltage of power battery pack is less than predeterminated voltage lower limit
Value；If the total voltage of power battery pack is greater than pre-set upper voltage limit value and continues the second preset time, correspondence forbids vehicle
And/or VTOG charges to power battery pack；If the total voltage of power battery pack is less than predeterminated voltage lower limit value and continues
Second preset time, then correspondence forbids vehicle and/or VTOG to discharge power battery pack.
Wherein, the value of the second preset time can be 2.5~3.5s, such as 3s.
If the total voltage of power battery pack be greater than pre-set upper voltage limit value or be less than predeterminated voltage lower limit value, and continue when
Between less than the second preset time, alternatively, the total voltage of power battery pack is between predeterminated voltage lower limit value and upper limit value, vehicle
Controller and/or VTOG then further judge whether the total voltage of power battery pack is greater than preset platform voltage upper limit value, with
And judge whether the total voltage of power battery pack is less than preset platform voltage lower limit value；If the total voltage of power battery pack is big
In platform voltage upper limit value and continue the second preset time, then correspondence forbids vehicle and/or VTOG to fill power battery pack
Electricity；If the total voltage of power battery pack is less than platform voltage lower limit value and continues the second preset time, correspondence forbids vehicle
And/or VTOG discharges to power battery pack.
If the total voltage of power battery pack is greater than preset platform voltage upper limit value or is less than under preset platform voltage
Limit value, and the duration less than the second preset time, alternatively, the total voltage of power battery pack is in the preset platform voltage upper limit
Between value and lower limit value, entire car controller and/or VTOG then further judge the voltage of any single battery in power battery pack
Whether between preset charging voltage upper limit value and lower limit value；If the voltage of the single battery is greater than preset charging electricity
It presses upper limit value and continues the second preset time, then correspondence forbids vehicle and/or VTOG to charge power battery pack；If should
The voltage of single battery, which is less than, preset charging voltage lower limit value and continues the second preset time, then it is corresponding forbid vehicle and/or
VTOG discharges to power battery pack.
If the voltage of any single battery is greater than the upper limit value or small in preset charging voltage section in power battery pack
Lower limit value in preset charging voltage section, and the duration less than the second preset time, alternatively, any in power battery pack
The voltage of single battery is between preset charging voltage upper limit value and lower limit value, and entire car controller and/or VTOG are then into one
Whether step judges whether the voltage of any single battery in power battery pack is greater than preset first monomer voltage threshold value, or be less than
Preset second comonomer voltage threshold；If the voltage of the single battery is greater than preset first monomer voltage threshold value and continues the
Two preset times, then correspondence forbids vehicle and/or VTOG to charge power battery pack；If the voltage of the single battery is small
In preset second comonomer voltage threshold and continue the second preset time, then correspondence forbids vehicle and/or VTOG to power battery
Group is discharged.
It should be noted that it is above-mentioned according to predeterminated voltage up/down limit value, it is preset platform voltage up/down limit value, preset
Charging voltage up/down limit value, preset the first/bis- monomer voltage threshold value are in the total voltage of power battery pack, power battery pack
The judgement order of any single battery is not limited to example shown in Fig. 3, can also be as needed to judging that order is adjusted.
In some embodiments of the invention, entire car controller and/or VTOG can also be in the total voltages of power battery pack
It is right when greater than the smaller value among pre-set upper voltage limit value and default platform voltage upper limit value and continuing second preset time
Vehicle and/or VTOG should be forbidden to charge power battery pack；And it is less than predeterminated voltage in the total voltage of power battery pack
The larger value among lower limit value and default platform voltage lower limit value and when continuing the second preset time, it is corresponding forbid vehicle and/or
VTOG discharges to power battery pack.
In other embodiments of the invention, entire car controller and/or VTOG can also be in the maximum monomer electricity of voltage
The voltage in pond is greater than the smaller value among preset charging voltage upper limit value and preset first monomer voltage threshold value and continues the
When two preset times, correspondence forbids vehicle and/or VTOG to charge power battery pack；And in the smallest monomer electricity of voltage
The voltage in pond is less than the larger value among preset charging voltage lower limit value and preset second comonomer voltage threshold and continues the
When two preset times, correspondence forbids vehicle and/or VTOG to discharge power battery pack.
In an embodiment of the present invention, as shown in figure 4, entire car controller does not receive BMS hair in the first preset time
When the message information sent, judge that communication failure occurs between entire car controller and BMS, and vehicle is forbidden to carry out power battery pack
Charge and discharge, at this point, VTOG can communicate event by communicate obtaining with entire car controller between entire car controller and BMS
Barrier, and then VTOG is forbidden to carry out charge and discharge to power battery pack.
Further, referring to fig. 4, the message information of BMS transmission is received in the first preset time when entire car controller,
When communication failure does not occur between entire car controller and BMS, entire car controller obtains BMS also with third prefixed time interval hair
The life frame sent judges whether adjacent life frame is identical, and when continuous second preset time of life frame is all the same, forbids whole
Vehicle carries out charge and discharge to power battery pack, at this point, VTOG can be by communicate acquisition life frame continuous the with entire car controller
Two preset times are all the same, and then VTOG is forbidden to carry out charge and discharge to power battery pack, wherein life frame is BMS to vehicle control
Device processed sends the number of message information.
Wherein, the value of third preset time can be 5~15ms, such as 10ms.
Specifically, if communicated between BMS and entire car controller normally, BMS is sent every 10ms to entire car controller
Message information (i.e. the status information of power battery pack), the corresponding value of life frame plus 1 is once.If life frame continuous second
Preset time such as 3s is all the same, i.e. the continuous 3s of BMS does not send message information to entire car controller, at this point, entire car controller is forbidden
Power battery pack carries out charge and discharge.
The protection control method of power battery pack in electric car according to an embodiment of the present invention, in BMS and full-vehicle control
Device communication is normal, and when the life frame that sends of BMS is normal, passes through entire car controller and VTOG obtains the state letter of power battery pack
Breath, and then entire car controller judges whether that vehicle is forbidden to carry out charge and discharge to power battery pack according to the status information of power battery pack
Electricity, VTOG judge whether that VTOG is forbidden to carry out charge and discharge, Yi Ji to power battery pack according to the status information of power battery pack
When life frame exception or BMS and entire car controller communication abnormality that BMS is sent, prohibit by the way that entire car controller and/or VTOG are corresponding
Only vehicle and/or VTOG forbid VTOG to power battery pack carry out charge and discharge, with when BMS breaks down to power battery pack into
Row second protection, thereby, it is possible to more effectively prevent power battery pack because overcharge or due to over-discharge caused by damage, improve power electric
The safety of pond group charge and discharge.
Fig. 5 is the Protection control system of power battery pack in the electric car of the embodiment of the present invention.As shown in figure 5, power
The Protection control system 100 of battery pack includes: battery manager BMS10, two-way inversion charging/discharging type electric machine controller VTOG20
With entire car controller 30.
Wherein, entire car controller 30 judges that including at least for BMS10 transmission whether is received in the first preset time to be moved
The message information of the status information of power battery pack, if it is, by being communicated with BMS10 to obtain the shape of power battery pack
State information, and judge whether to forbid carrying out charge and discharge to power battery pack according to the status information of power battery pack, in BMS10
Second protection is carried out to power battery pack when breaking down, wherein the value of the first preset time can be 4.5~5.5s, example
Such as 5s；The status information of power battery pack includes the voltage of single battery in the total voltage and power battery pack of power battery pack.
After the status information that entire car controller 30 obtains power battery pack, VTOG20 is by being communicated with entire car controller 30 to obtain
The status information of power battery pack is taken, and judges whether to forbid VTOG20 to power battery according to the status information of power battery pack
Group carries out charge and discharge, to carry out second protection to power battery pack when BMS10 breaks down.
Wherein, vehicle carries out charging to power battery pack and includes at least vehicle to power battery pack feedback electric energy, vehicle pair
Power battery pack electric discharge includes at least load (such as car light, multimedia) power supply of the power battery pack on vehicle；VTOG20 pairs
Power battery pack carries out charging and includes at least power grid/charging pile to power battery pack charging, and VTOG20 discharges to power battery pack
It powers including at least power battery pack to external equipment (such as electric car, off-board electrical equipment), and vehicle is to power electric
Pond group carries out charge and discharge by vehicle control unit controls, and VTOG20 carries out charge and discharge to power battery pack and controlled by VTOG20.
In an embodiment of the present invention, referring to fig. 2, between entire car controller 30 and BMS10, entire car controller 30 with
Two-way communication can be carried out by CAN (Controller Area Network, controller local area network) between VTOG20.
Specifically, when BMS10 communicates normal with entire car controller 30, BMS10 can sample the total voltage of power battery pack
With the voltage of single battery in power battery pack, and entire car controller 30 is sent it to.And then VTOG20 can by with it is whole
Vehicle controller 30 is communicated to obtain the voltage of single battery in the total voltage and power battery pack of power battery pack.
In an embodiment of the present invention, when BMS10 communicates normal with entire car controller 30, BMS10 can also be to vehicle control
Device 30 processed send the voltage rating (or platform voltage upper limit value and lower limit value) of power battery pack, pre-set upper voltage limit value and under
Limit value, preset charging voltage upper limit value and lower limit value, preset first monomer voltage threshold value and preset second comonomer electricity
Press threshold value.Wherein, preset first monomer voltage threshold value (such as can be 4V) is greater than preset second comonomer voltage threshold and (such as may be used
To be 2V).It is appreciated that above-mentioned parameter preset need to only be sent once.
It should be noted that the upper limit value V in platform voltage sectionIt is flatMax and lower limit value VIt is flatMin can be by VTOG according to BMS
The voltage rating V of the power battery pack of transmissionVolumeIt is calculated, for example, VIt is flatMax=VVolume* 3.7/3.2, VIt is flatMin=VVolume*2.2/
3.2, wherein a*3.7V is the upper voltage limit of single battery, and a*3.2V is that all single batteries are averaged in power battery pack
Voltage, a*2.2V are the voltage lower limit values of single battery, and a is positive value, and value can be depending on specific single battery.
Optionally, above-mentioned parameter preset can also be stored in entire car controller 30.
Specifically, if BMS10 is communicated normally with entire car controller 30, entire car controller 30 and VTOG20 are got
The status information for the power battery pack that BMS10 is sent, and the BMS10 charge and discharge that cannot achieve to power battery pack of breaking down is automatically controlled
System then can carry out charge and discharge control to power battery pack by entire car controller 30 and/or VTOG20.
In some embodiments of the invention, referring to Fig. 3, firstly, entire car controller 30 and/or VTOG20 judge power electric
Whether the total voltage of pond group is in predeterminated voltage section, and is greater than pre-set upper voltage limit value in the total voltage of power battery pack and holds
When continuous second preset time, correspondence forbids vehicle and/or VTOG20 to charge power battery pack；In the total of power battery pack
When voltage is less than predeterminated voltage lower limit value and continues the second preset time, correspondence forbids vehicle and/or VTOG20 to power battery
Group is discharged.
Wherein, the value of the second preset time can be 2.5~3.5s, such as 3s.
If the total voltage of power battery pack be greater than pre-set upper voltage limit value or be less than predeterminated voltage lower limit value, and continue when
Between less than the second preset time, alternatively, the total voltage of power battery pack is between predeterminated voltage lower limit value and upper limit value, vehicle
Controller 30 and/or VTOG20 then further judge whether the total voltage of power battery pack is greater than the preset platform voltage upper limit
Value, and judge whether the total voltage of power battery pack is less than preset platform voltage lower limit value；In total electricity of power battery pack
When pressure is greater than platform voltage upper limit value and continues the second preset time, correspondence forbids vehicle and/or VTOG20 to power battery pack
It charges；It is less than platform voltage lower limit value in the total voltage of power battery pack and continues the second preset time, then correspondence is forbidden
Vehicle and/or VTOG20 discharge to power battery pack.
If the total voltage of power battery pack is greater than preset platform voltage upper limit value or is less than under preset platform voltage
Limit value, and the duration less than the second preset time, alternatively, the total voltage of power battery pack is in preset platform voltage lower limit
Between value and upper limit value, entire car controller 30 and/or VTOG20 then further judge any single battery in V power battery pack
Whether voltage is between preset charging voltage upper limit value and lower limit value；If the voltage of the single battery is greater than preset fill
Piezoelectric voltage upper limit value and continue the second preset time, then correspondence forbids vehicle and/or VTOG20 power battery pack to charge；Such as
The voltage of the fruit single battery is less than preset charging voltage lower limit value and continues the second preset time, then correspondence forbids vehicle
And/or VTOG20 power battery pack is discharged.
If the voltage of any single battery is greater than preset charging voltage upper limit value or is less than default in power battery pack
Charging voltage lower limit value, and the duration less than the second preset time, alternatively, in power battery pack any single battery electricity
Pressure is between preset charging voltage upper limit value and lower limit value, and then further judgement is dynamic by entire car controller 30 and/or VTOG20
Whether the voltage of any single battery is greater than preset first monomer voltage threshold value in power battery pack, or whether is less than preset the
Two monomer voltage threshold values；If the voltage of the single battery be greater than preset first monomer voltage threshold value and continue second it is default when
Between, then correspondence forbids vehicle and/or VTOG20 power battery pack to charge；If the voltage of the single battery is less than preset
Second comonomer voltage threshold and continue the second preset time, then correspondence forbids vehicle and/or VTOG20 power battery pack to be put
Electricity.
It should be noted that it is above-mentioned according to predeterminated voltage up/down limit value, it is preset platform voltage up/down limit value, preset
Charging voltage up/down limit value, preset the first/bis- monomer voltage threshold value are in the total voltage of power battery pack, power battery pack
The judgement order of any single battery is not limited to example shown in Fig. 3, can also be as needed to judging that order is adjusted.
In some embodiments of the invention, entire car controller 30 and/or VTOG20 can also be in the total of power battery pack
Voltage is greater than the smaller value among pre-set upper voltage limit value and default platform voltage upper limit value and continues second preset time
When, correspondence forbids vehicle and/or VTOG20 to charge power battery pack；And it is less than in advance in the total voltage of power battery pack
If the larger value among voltage lower limit value and default platform voltage lower limit value and when continuing the second preset time, correspondence forbids vehicle
And/or VTOG20 discharges to power battery pack.
In other embodiments of the invention, entire car controller 30 and/or VTOG20 can also be in the maximum lists of voltage
The voltage of body battery is greater than preset charging voltage upper limit value and the smaller value among preset first monomer voltage threshold value and holds
When continuous second preset time, correspondence forbids vehicle and/or VTOG20 to charge power battery pack；And it is the smallest in voltage
The voltage of single battery be less than the larger value among preset charging voltage lower limit value and preset second comonomer voltage threshold and
When continuing the second preset time, correspondence forbids vehicle and/or VTOG20 to discharge power battery pack.
In an embodiment of the present invention, as shown in figure 4, entire car controller 30 does not receive BMS in the first preset time
When the message information of transmission, judge that communication failure occurs between entire car controller 30 and BMS10, and forbid vehicle to power battery
Group carries out charge and discharge, at this point, VTOG20 can by communicate with entire car controller 30 obtain entire car controller 30 and BMS10 it
Between communication failure occurs, and then forbid VTOG20 to power battery pack carry out charge and discharge.
Further, referring to fig. 4, the message letter of BMS transmission is received in the first preset time when entire car controller 30
Breath, i.e., when communication failure does not occur between entire car controller 30 and BMS10, it is pre- with third that entire car controller 30 also obtains BMS10
If the life frame that time interval is sent, judges whether adjacent life frame is identical, and equal in continuous second preset time of life frame
When identical, vehicle is forbidden to carry out charge and discharge to power battery pack, at this point, VTOG20 can be by being communicated with entire car controller 30
It is all the same to obtain continuous second preset time of life frame, and then VTOG20 is forbidden to carry out charge and discharge to power battery pack, wherein is raw
Ordering frame is the number that BMS10 sends message information to entire car controller 30.
The Protection control system of power battery pack in electric car according to an embodiment of the present invention, by entire car controller and
VTOG obtains the status information of power battery pack, and then entire car controller judges whether to prohibit according to the status information of power battery pack
Only vehicle carries out charge and discharge to power battery pack, and VTOG judges whether to forbid VTOG to dynamic according to the status information of power battery pack
Power battery pack carries out charge and discharge, and to carry out second protection to power battery pack when BMS breaks down, thereby, it is possible to more effective
Prevent power battery pack because overcharge or due to over-discharge caused by damage, improve the safety of power battery pack charge and discharge.
Further, the invention proposes a kind of electric cars.
Fig. 6 is the block diagram of electric car according to an embodiment of the present invention.As shown in fig. 6, the electric car 1000 includes
The Protection control system 100 of power battery pack in electric car.
The electric car of the embodiment of the present invention passes through full-vehicle control using the protection control method of above-mentioned power battery pack
Device and VTOG obtain the status information of power battery pack, and then entire car controller is according to the judgement of the status information of power battery pack
No that vehicle is forbidden to carry out charge and discharge to power battery pack, VTOG judges whether to forbid VTOG according to the status information of power battery pack
Charge and discharge are carried out to power battery pack, to carry out second protection to power battery pack when BMS breaks down, thereby, it is possible to more
Effectively prevent power battery pack because overcharge or due to over-discharge caused by damage, improve the safety of power battery pack charge and discharge.
In addition, electric car according to an embodiment of the present invention other compositions and effect for this field ordinary skill
All be for personnel it is known, in order to reduce redundancy, be not repeated herein.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (19)
1. the protection control method of power battery pack in a kind of electric car, which is characterized in that the electric car includes battery
Manager BMS, two-way inversion charging/discharging type electric machine controller VTOG and entire car controller, the described method comprises the following steps:
The entire car controller judges the message information that the BMS is sent whether is received in the first preset time, wherein institute
State the status information that message information includes at least power battery pack；
If receiving the message information that the BMS is sent in first preset time, entire car controller if, passes through
Communicated with the BMS to obtain the status information of the power battery pack, so the VTOG by with the vehicle control
Device processed is communicated to obtain the status information of the power battery pack, wherein the status information of the power battery pack includes
The voltage of single battery in the total voltage of the power battery pack and the power battery pack；
The entire car controller judges whether to forbid vehicle to the power battery according to the status information of the power battery pack
Group carries out charge and discharge, and/or, the VTOG judges whether to forbid described VTOG pairs according to the status information of the power battery pack
The power battery pack carries out charge and discharge, to carry out second protection to the power battery pack when the BMS breaks down.
2. the protection control method of power battery pack in electric car as described in claim 1, which is characterized in that according to described
The status information of power battery pack judges whether to forbid carrying out charge and discharge to the power battery pack, comprising:
Judge whether the total voltage of the power battery pack is greater than pre-set upper voltage limit value, and judges the power battery pack
Whether total voltage is less than predeterminated voltage lower limit value；
If the total voltage of the power battery pack is greater than the pre-set upper voltage limit value and continues the second preset time, forbid
It charges to the power battery pack；
If the total voltage of the power battery pack is less than the predeterminated voltage lower limit value and continues second preset time,
Forbid discharging to the power battery pack.
3. the protection control method of power battery pack in electric car as described in claim 1, which is characterized in that according to described
The status information of power battery pack judges whether that G is forbidden to carry out charge and discharge to the power battery pack, further includes:
Judge whether the total voltage of the power battery pack is greater than preset platform voltage upper limit value, and judges the power electric
Whether the total voltage of pond group is less than preset platform voltage lower limit value, wherein the preset platform voltage upper limit value and described
Preset platform voltage lower limit value is calculated by the VTOG according to the voltage rating of the BMS power battery pack sent
It arrives；
If the total voltage of the power battery pack is greater than the platform voltage upper limit value and continues the second preset time, forbid
It charges to the power battery pack；
If the total voltage of the power battery pack is less than the platform voltage lower limit value and continues second preset time,
Forbid discharging to the power battery pack.
4. the protection control method of power battery pack in electric car as claimed in claim 2 or claim 3, which is characterized in that according to
The status information of the power battery pack judges whether to forbid carrying out charge and discharge to the power battery pack, further includes:
If the total voltage of the power battery pack be greater than among pre-set upper voltage limit value and default platform voltage upper limit value compared with
Small value and lasting second preset time, then forbid charging to the power battery pack；
If the total voltage of the power battery pack be less than among predeterminated voltage lower limit value and default platform voltage lower limit value compared with
Big value and lasting second preset time, then forbid discharging to the power battery pack.
5. the protection control method of power battery pack in electric car as described in claim 1, which is characterized in that according to described
The status information of power battery pack judges whether to forbid carrying out charge and discharge to the power battery pack, further includes:
Judge whether the voltage of any single battery in the power battery pack is greater than preset charging voltage upper limit value, and sentences
Whether the voltage of any single battery is less than preset charging voltage lower limit value in the power battery pack of breaking；
If the voltage of the single battery is greater than the preset charging voltage upper limit value and continues second preset time,
Forbid charging to the power battery pack；
If the voltage of the single battery is less than preset charging voltage lower limit value and continues second preset time, forbid
It discharges the power battery pack.
6. the protection control method of power battery pack in electric car as described in claim 1, which is characterized in that according to described
The status information of power battery pack judges whether to forbid carrying out charge and discharge to the power battery pack, further includes:
Judge whether the voltage of any single battery in the power battery pack is greater than preset first monomer voltage threshold value, and
Judge whether the voltage of any single battery in the power battery pack is less than preset second comonomer voltage threshold, wherein institute
Preset second comonomer voltage threshold is stated less than the preset first monomer voltage threshold value；
If the voltage of the single battery is greater than the preset first monomer voltage threshold value and continues second preset time,
Then forbid charging to the power battery pack；
If the voltage of the single battery is less than preset second comonomer voltage threshold and continues second preset time, prohibit
Only discharge the power battery pack.
7. such as the protection control method of power battery pack in electric car described in claim 5 or 6, which is characterized in that according to
The status information of the power battery pack judges whether to forbid carrying out charge and discharge to the power battery pack, further includes:
If the voltage of the single battery is greater than among preset charging voltage upper limit value and preset first monomer voltage threshold value
Smaller value and continue second preset time, then forbid charging to the power battery pack；
If the voltage of the single battery is less than among preset charging voltage lower limit value and preset second comonomer voltage threshold
The larger value and continue second preset time, then forbid discharging to the power battery pack.
8. the protection control method of power battery pack in electric car as described in claim 1, which is characterized in that further include:
If not receiving the message information that the BMS is sent in first preset time, entire car controller if, prohibits
Only vehicle carries out charge and discharge to the power battery pack, and by being communicated with the VTOG so that the VTOG forbids institute
It states VTOG and charge and discharge is carried out to the power battery pack.
9. the protection control method of power battery pack in electric car as claimed in claim 5, which is characterized in that the vehicle
Controller receives the message information that the BMS is sent in first preset time, the method also includes:
The entire car controller obtains the life frame that the BMS is sent with third prefixed time interval, judges adjacent life frame
It is whether identical, and when continuous second preset time of life frame is all the same, forbid vehicle to carry out charge and discharge to the power battery pack
Electricity, and by being communicated with the VTOG so that the VTOG forbids the VTOG to carry out charge and discharge to the power battery pack
Electricity, wherein the life frame is the number that the BMS sends the message information to the entire car controller.
10. the Protection control system of power battery pack in a kind of electric car characterized by comprising
Battery manager BMS；
Entire car controller, the entire car controller judge that the BMS whether is received in the first preset time to be sent at least
The message information of status information including power battery pack, if it is, described dynamic to obtain by being communicated with the BMS
The status information of power battery pack, and judged whether to forbid vehicle to the power electric according to the status information of the power battery pack
Pond group carries out charge and discharge, to carry out second protection to the power battery pack when the BMS breaks down, wherein described dynamic
The status information of power battery pack includes the voltage of single battery in the total voltage and the power battery pack of the power battery pack；
Two-way inversion charging/discharging type electric machine controller VTOG obtains the state letter of the power battery pack in the entire car controller
After breath, the VTOG obtains the status information of the power battery pack, and root by being communicated with the entire car controller
Judge whether that VTOG is forbidden to carry out charge and discharge to the power battery pack according to the status information of the power battery pack, described
Second protection is carried out to the power battery pack when BMS breaks down.
11. the Protection control system of power battery pack in electric car as claimed in claim 10, which is characterized in that according to institute
The status information for stating power battery pack judges whether to forbid carrying out charge and discharge to the power battery pack
Judge whether the total voltage of the power battery pack is greater than pre-set upper voltage limit value, and judges the power battery pack
Whether total voltage is less than predeterminated voltage lower limit value；
When the total voltage of the power battery pack is greater than pre-set upper voltage limit value and continues the second preset time, forbid to described
Power battery pack charges；
When the total voltage of the power battery pack is less than predeterminated voltage lower limit value and continues second preset time, forbid pair
The power battery pack is discharged.
12. the Protection control system of power battery pack in electric car as claimed in claim 10, it is characterised in that according to institute
The status information for stating power battery pack judges whether to forbid carrying out charge and discharge to the power battery pack further include:
Judge whether the total voltage of the power battery pack is greater than preset platform voltage upper limit value, and judges the power electric
Whether the total voltage of pond group is less than preset platform voltage lower limit value, wherein the preset platform voltage upper limit value and described
Preset platform voltage lower limit is calculated by the VTOG according to the voltage rating of the BMS power battery pack sent；
When the total voltage of the power battery pack is greater than platform voltage upper limit value and continues the second preset time, forbid to described
Power battery pack charges；
If the total voltage of the power battery pack is less than platform voltage lower limit value and continues second preset time, forbid
It discharges the power battery pack.
13. the Protection control system of power battery pack in the electric car as described in claim 11 or 12, which is characterized in that root
Judge whether to forbid carrying out charge and discharge to the power battery pack according to the status information of the power battery pack, further includes:
If the total voltage of the power battery pack be greater than among pre-set upper voltage limit value and default platform voltage upper limit value compared with
Small value and lasting second preset time, then forbid charging to the power battery pack；
If the total voltage of the power battery pack be less than among predeterminated voltage lower limit value and default platform voltage lower limit value compared with
Big value and lasting second preset time, then forbid discharging to the power battery pack.
14. the Protection control system of power battery pack in electric car as claimed in claim 10, which is characterized in that according to institute
The status information for stating power battery pack judges whether to forbid carrying out charge and discharge to the power battery pack further include:
Judge whether the voltage of any single battery in the power battery pack is greater than preset charging voltage upper limit value, and sentences
Whether the voltage of any single battery is less than preset charging voltage lower limit value in the power battery pack of breaking；
When the voltage of the single battery is greater than the preset charging voltage upper limit value and continues second preset time, prohibit
Only the power battery pack charges；
When the voltage of the single battery is less than preset charging voltage lower limit value and continues second preset time, forbid institute
Power battery pack is stated to discharge.
15. the Protection control system of power battery pack in electric car as claimed in claim 10, which is characterized in that according to institute
The status information for stating power battery pack judges whether to forbid carrying out charge and discharge to the power battery pack, further includes:
Judge whether the voltage of any single battery in the power battery pack is greater than preset first monomer voltage threshold value, and
Judge whether the voltage of any single battery in the power battery pack is less than preset second comonomer voltage threshold, wherein institute
Preset second comonomer voltage threshold is stated less than the preset first monomer voltage threshold value；
When the voltage of the single battery is greater than the preset first monomer voltage threshold value and continues second preset time,
Forbid charging to the power battery pack；
It is less than preset second comonomer voltage threshold in the voltage of the single battery and continues second preset time, forbids pair
The power battery pack is discharged.
16. the Protection control system of power battery pack in the electric car as described in claims 14 or 15, which is characterized in that root
Judge whether to forbid carrying out charge and discharge to the power battery pack according to the status information of the power battery pack, further includes:
It is greater than among preset charging voltage upper limit value and preset first monomer voltage threshold value in the voltage of the single battery
When smaller value and lasting second preset time, forbid charging to the power battery pack；
It is less than among preset charging voltage lower limit value and preset second comonomer voltage threshold in the voltage of the single battery
When the larger value and lasting second preset time, forbid discharging to the power battery pack.
17. the Protection control system of power battery pack in electric car as claimed in claim 10, which is characterized in that described whole
When vehicle controller does not receive the message information that the BMS is sent also in the first preset time, forbid the vehicle to described
Power battery pack carries out charge and discharge, and by being communicated with the VTOG so that the VTOG forbids the VTOG to described
Power battery pack carries out charge and discharge.
18. the Protection control system of power battery pack in electric car as claimed in claim 17, which is characterized in that described whole
After vehicle controller receives the message information that the BMS is sent in the first preset time, it is default with third also to obtain the BMS
The life frame that time interval is sent, judges whether adjacent life frame is identical, and homogeneous in continuous second preset time of life frame
Meanwhile the vehicle is forbidden to carry out charge and discharge to the power battery pack, and by being communicated with the VTOG so that institute
Stating VTOG forbids the VTOG to carry out charge and discharge to the power battery pack, wherein the life frame is the BMS to described whole
Vehicle controller sends the number of the message information.
19. a kind of electric car, which is characterized in that including being moved in the electric car as described in any one of claim 10-18
The Protection control system of power battery pack.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710710511.6A CN110015126B (en) | 2017-08-18 | 2017-08-18 | Electric automobile and protection control method and system of power battery pack in electric automobile |
| PCT/CN2018/101005 WO2019034140A1 (en) | 2017-08-18 | 2018-08-17 | Electric vehicle, and protection control method and system thereof for power battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710710511.6A CN110015126B (en) | 2017-08-18 | 2017-08-18 | Electric automobile and protection control method and system of power battery pack in electric automobile |
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| CN110015126A true CN110015126A (en) | 2019-07-16 |
| CN110015126B CN110015126B (en) | 2021-06-18 |
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| CN113442786B (en) * | 2020-03-27 | 2023-11-14 | 北京新能源汽车股份有限公司 | Power battery discharging control method and device and automobile |
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| WO2019034140A1 (en) | 2019-02-21 |
| CN110015126B (en) | 2021-06-18 |
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