CN107415756A - A kind of cell management system of electric automobile equalization methods based on passive balanced way - Google Patents
A kind of cell management system of electric automobile equalization methods based on passive balanced way Download PDFInfo
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- CN107415756A CN107415756A CN201710742612.1A CN201710742612A CN107415756A CN 107415756 A CN107415756 A CN 107415756A CN 201710742612 A CN201710742612 A CN 201710742612A CN 107415756 A CN107415756 A CN 107415756A
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- management system
- monomer
- electric automobile
- cell
- equalization
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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
- 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
-
- 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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The invention discloses a kind of cell management system of electric automobile equalization methods based on passive balanced way, judge whether cell management system of electric automobile meets the enabled condition of equilibrium, if meet, battery management system is then allowed to be carried out according to cell-state balanced, if it is unsatisfactory for, battery management system is not allowed then to carry out equilibrium according to cell-state, specific equalization methods include monomer discharge capacity difference calculates, balanced electricity calculates and balanced electricity stores etc..The equalization methods of the present invention can realize the equilibrium to cell management system of electric automobile, and the life-span of electric automobile cell will not be impacted.
Description
Technical field
The present invention relates to electric vehicle engineering field, it particularly relates to a kind of electronic vapour based on passive balanced way
Car battery management system equalization methods.
Background technology
Existing battery pack balancing technology, according to the Expenditure Levels of energy in balancing procedure be broadly divided into energy-dissipating and
The major class of energy non-dissipative type two.Wherein, on the one hand energy-dissipating electric quantity equalizing system easily causes the waste of energy, the opposing party
Face can bring the problem of thermal management.The structure of energy non-dissipative type electric quantity equalizing system is complex, and device is more, and cost is high,
Reliability is low, in battery pack application when the low cell of the energy cell high with energy differs farther out in battery pack
Required time for balance is also longer.And existing battery balanced control method majority is carried out according to the height of monomer battery voltage
Judge to control energy transfer.It is well known that cell voltage can not reflect battery dump energy exactly, such as voltage is high
The most battery of battery not necessarily electricity, then carry out electric quantity balancing by simple voltage determination methods, it is possible to aggravation electricity
Pond group electricity it is unbalanced, so as to reduce the service life of battery pack.
The content of the invention
For the above-mentioned technical problem in correlation technique, the present invention proposes a kind of electric automobile based on passive balanced way
Battery management system equalization methods, the above-mentioned deficiency of prior art can be overcome.
To realize above-mentioned technical purpose, the technical proposal of the invention is realized in this way：
A kind of cell management system of electric automobile equalization methods based on passive balanced way, judge batteries of electric automobile management system
Whether system meets the enabled condition of equilibrium, if it is satisfied, then it is balanced to allow battery management system to be carried out according to cell-state,
If be unsatisfactory for, battery management system is not allowed to be carried out according to cell-state balanced, specific equalization methods are included such as
Lower step：
S1：To electric on cell management system of electric automobile；
S2：Judge whether cell management system of electric automobile meets that lower electricity exceedes the nominal time and battery state of charge is more than battery
State of charge calibration value, if it is not, then S3 is performed, if it is, performing S4；
S3：Memory equilibrium electricity is read, and goes to and performs S8；
S4：It is poor to calculate all battery cell discharge capacities；
S5：Judge whether the pressure difference of all monomers of system is more than or equal to demarcation pressure difference, maximum pd quantity difference is more than demarcation electric discharge
Amount is poor, and minimum discharge capacity difference is poor less than or equal to demarcation discharge capacity, if it is not, then S3 is performed, if it is, performing S6；
S6：Recalculate the equalization target electricity initial value of each monomer；
S7：It is balanced to start battery cell；
S8：Judge whether each monomer equalization target electricity is less than or equal to 0, if it is not, then S7 is performed, if it is, performing
S9；
S9：Equilibrium terminates；
S10：The whether lower electricity of cell management system of electric automobile is judged, if it is not, then S3 is performed, if it is, performing S11；
S11：By remaining balanced electricity deposit memory.
Further, balanced enabled condition includes：Battery cell voltage signal condition for validity, fault free response require to prohibit
Only equalization function condition and from controller circuitry plate temperature enabled condition.
Preferably, specifically included from controller circuitry plate temperature enabled condition：If controller temperature is higher than on calibration value
In limited time, the equalization function for whole monomers that the No starting controller is controlled, if equalization function has been started up, closing should
Equalization function；If controller temperature is less than calibration value lower limit, it is allowed to start the equal of whole monomers that the controller is controlled
Weigh function；If the controller temperature is between the calibration value upper limit and calibration value lower limit, permitting for monomer equalization function is kept
Perhaps or illegal state.
Preferably, the calibration value upper limit and calibration value lower limit are respectively 70 DEG C and 60 DEG C.
Further, in step S5, maximum pd quantity difference subtracts minimum monomer discharge capacity equal to highest monomer discharge capacity, minimum
Discharge capacity difference is equal to time low monomer discharge capacity and subtracts minimum monomer discharge capacity, wherein, the calculation formula of monomer discharge capacity is：
Monomer discharge capacity=（100%- battery state of charge）× nominal capacity.
Further, in step S6, the equalization target electricity initial value of each monomer is monomer present discharge amount and highest monomer
The difference of discharge capacity.
Further, in step S8, each monomer equalization target electricity is that the monomer equalization target electricity initial value subtracts monomer
Integration of the euqalizing current to the time.
Preferably, the calculation formula of monomer euqalizing current is：
Monomer euqalizing current=（Monomer voltage-diode drop）× coefficient/equalizing resistance resistance,
Wherein, diode drop 0.7V, equalizing resistance resistance are 33 Ω, and coefficient is defaulted as 0.9.
Beneficial effects of the present invention：The equalization methods of the present invention can be realized to the equal of cell management system of electric automobile
Weighing apparatus, and the life-span of electric automobile cell will not be impacted.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing needed to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the present invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, can also be obtained according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is a kind of cell management system of electric automobile based on passive balanced way described according to embodiments of the present invention
Equalization methods.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained, belong to what the present invention protected
Scope.
A kind of as shown in figure 1, batteries of electric automobile pipe based on passive balanced way described according to embodiments of the present invention
System equalization method is managed, judges whether cell management system of electric automobile meets the enabled condition of equilibrium, if it is satisfied, then allowing
Battery management system carries out equilibrium according to cell-state, if be unsatisfactory for, does not allow battery management system according to battery
Free state carries out equilibrium, and specific equalization methods comprise the following steps：
S1：To electric on cell management system of electric automobile；
S2：Judge whether cell management system of electric automobile meets that lower electricity exceedes the nominal time and battery state of charge is more than battery
State of charge calibration value, if it is not, then S3 is performed, if it is, performing S4；
S3：Memory equilibrium electricity is read, and goes to and performs S8；
S4：It is poor to calculate all battery cell discharge capacities；
S5：Judge whether the pressure difference of all monomers of system is more than or equal to demarcation pressure difference, maximum pd quantity difference is more than demarcation electric discharge
Amount is poor, and minimum discharge capacity difference is poor less than or equal to demarcation discharge capacity, if it is not, then S3 is performed, if it is, performing S6；
S6：Recalculate the equalization target electricity initial value of each monomer；
S7：It is balanced to start battery cell；
S8：Judge whether each monomer equalization target electricity is less than or equal to 0, if it is not, then S7 is performed, if it is, performing
S9；
S9：Equilibrium terminates；
S10：The whether lower electricity of cell management system of electric automobile is judged, if it is not, then S3 is performed, if it is, performing S11；
S11：By remaining balanced electricity deposit memory.
In one embodiment, balanced enabled condition includes：Battery cell voltage signal condition for validity, fault-free are rung
Equalization function condition should be required to forbid and from controller circuitry plate temperature enabled condition.
In one embodiment, specifically included from controller circuitry plate temperature enabled condition：If controller temperature is high
When the calibration value upper limit, the equalization function for whole monomers that the No starting controller is controlled, if equalization function has opened
It is dynamic, then close the equalization function；If controller temperature is less than calibration value lower limit, it is allowed to start the controller controlled it is complete
The equalization function of portion's monomer；If the controller temperature is between the calibration value upper limit and calibration value lower limit, keep monomer equal
The permission for the function that weighs or illegal state.
In one embodiment, the calibration value upper limit and calibration value lower limit are respectively 70 DEG C and 60 DEG C.
In one embodiment, in step S5, maximum pd quantity difference subtracts minimum monomer equal to highest monomer discharge capacity and put
Electricity, minimum discharge capacity difference are equal to time low monomer discharge capacity and subtract minimum monomer discharge capacity, wherein, the calculation formula of monomer discharge capacity
For：
Monomer discharge capacity=（100%- battery state of charge）× nominal capacity.
In one embodiment, in step S6, the equalization target electricity initial value of each monomer for monomer present discharge amount with
The difference of highest monomer discharge capacity.
In one embodiment, in step S8, each monomer equalization target electricity is the monomer equalization target electricity initial value
Subtract integration of the monomer euqalizing current to the time.
In one embodiment, the calculation formula of monomer euqalizing current is：
Monomer euqalizing current=（Monomer voltage-diode drop）× coefficient/equalizing resistance resistance,
Wherein, diode drop 0.7V, equalizing resistance resistance are 33 Ω, and coefficient is defaulted as 0.9.
In order to facilitate understand the present invention above-mentioned technical proposal, below by way of in specifically used mode to the present invention it is above-mentioned
Technical scheme is described in detail.
When specifically used, according to a kind of batteries of electric automobile management system based on passive balanced way of the present invention
System equalization methods, first：Judge whether cell management system of electric automobile meets the enabled condition of equilibrium, if it is satisfied, then permitting
Perhaps battery management system is carried out balanced according to cell-state, and balanced enabled condition includes：Battery cell voltage signal has
Effect condition, fault free response requirement forbid equalization function condition and from controller circuitry plate temperature enabled condition；Have in equilibrium
The equalization methods of body are：S1：To electric on cell management system of electric automobile；S2：Whether judge cell management system of electric automobile
Meet that lower electricity exceedes the nominal time, and battery state of charge is more than battery state of charge calibration value, nominal time and battery charge
State calibration value can be demarcated as the case may be, such as will be set to the nominal time 2 hours, battery state of charge calibration value
For 90%, if it is not, then S3 is performed, if it is, performing S4；S3：Memory equilibrium electricity is read, and goes to and performs S8；S4：
It is poor to calculate all battery cell discharge capacities；S5：Judge whether the pressure difference of all monomers of system is more than or equal to demarcation pressure difference, it is maximum
Discharge capacity difference is poor more than demarcation discharge capacity, and minimum discharge capacity difference is less than or equal to demarcation discharge capacity, demarcates pressure difference and demarcation is discharged
Amount difference can be demarcated as the case may be, and present invention specific implementation markers level pressure difference is 15mV, and demarcation discharge capacity difference is
10Ah, if it is not, then S3 is performed, if it is, performing S6；S6：Recalculate the equalization target electricity initial value of each monomer；S7：
It is balanced to start battery cell；S8：Judge whether each monomer equalization target electricity is less than or equal to 0, if it is not, then S7 is performed,
If it is, perform S9；S9：Equilibrium terminates；S10：The whether lower electricity of cell management system of electric automobile is judged, if it is not, then holding
Row S3, if it is, performing S11；S11：By remaining balanced electricity deposit memory.
In summary, equalization methods of the invention can realize the equilibrium to cell management system of electric automobile, and will not
The life-span of electric automobile cell is impacted.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (8)
1. a kind of cell management system of electric automobile equalization methods based on passive balanced way, it is characterised in that judge electronic
Whether automobile batteries management system meets the enabled condition of equilibrium, if it is satisfied, then allowing battery management system according to battery list
Body state carries out equilibrium, if be unsatisfactory for, does not allow battery management system to be carried out according to cell-state balanced, specifically
Equalization methods comprise the following steps：
S1：To electric on cell management system of electric automobile；
S2：Judge whether cell management system of electric automobile meets that lower electricity exceedes the nominal time and battery state of charge is more than battery
State of charge calibration value, if it is not, then S3 is performed, if it is, performing S4；
S3：Memory equilibrium electricity is read, and goes to and performs S8；
S4：It is poor to calculate all battery cell discharge capacities；
S5：Judge whether the pressure difference of all monomers of system is more than or equal to demarcation pressure difference, maximum pd quantity difference is more than demarcation electric discharge
Amount is poor, and minimum discharge capacity difference is poor less than or equal to demarcation discharge capacity, if it is not, then S3 is performed, if it is, performing S6；
S6：Recalculate the equalization target electricity initial value of each monomer；
S7：It is balanced to start battery cell；
S8：Judge whether each monomer equalization target electricity is less than or equal to 0, if it is not, then S7 is performed, if it is, performing
S9；
S9：Equilibrium terminates；
S10：The whether lower electricity of cell management system of electric automobile is judged, if it is not, then S3 is performed, if it is, performing S11；
S11：By remaining balanced electricity deposit memory.
2. a kind of cell management system of electric automobile equalization methods based on passive balanced way according to claim 1,
Characterized in that, balanced enabled condition includes：Equilibrium is forbidden in battery cell voltage signal condition for validity, fault free response requirement
Functional conditions and from controller circuitry plate temperature enabled condition.
3. a kind of cell management system of electric automobile equalization methods based on passive balanced way according to claim 2,
Characterized in that, specifically included from controller circuitry plate temperature enabled condition：If controller temperature is higher than the calibration value upper limit,
The equalization function for whole monomers that the No starting controller is controlled, if equalization function has been started up, close the equilibrium
Function；If controller temperature is less than calibration value lower limit, it is allowed to start the balanced work(for whole monomers that the controller is controlled
Energy；If the controller temperature is between the calibration value upper limit and calibration value lower limit, keep monomer equalization function permission or
Illegal state.
4. a kind of cell management system of electric automobile equalization methods based on passive balanced way according to claim 3,
Characterized in that, the calibration value upper limit and calibration value lower limit are respectively 70 DEG C and 60 DEG C.
5. a kind of cell management system of electric automobile equalization methods based on passive balanced way according to claim 1,
Characterized in that, in step S5, maximum pd quantity difference subtracts minimum monomer discharge capacity, minimum discharge capacity equal to highest monomer discharge capacity
Difference is equal to time low monomer discharge capacity and subtracts minimum monomer discharge capacity, wherein, the calculation formula of monomer discharge capacity is：
Monomer discharge capacity=（100%- battery state of charge）× nominal capacity.
6. a kind of cell management system of electric automobile equalization methods based on passive balanced way according to claim 1,
Characterized in that, in step S6, the equalization target electricity initial value of each monomer is monomer present discharge amount and highest monomer discharge capacity
Difference.
7. a kind of cell management system of electric automobile equalization methods based on passive balanced way according to claim 6,
Characterized in that, in step S8, each monomer equalization target electricity is that the monomer equalization target electricity initial value subtracts the balanced electricity of monomer
Flow the integration to the time.
8. a kind of cell management system of electric automobile equalization methods based on passive balanced way according to claim 7,
Characterized in that, the calculation formula of monomer euqalizing current is：
Monomer euqalizing current=（Monomer voltage-diode drop）× coefficient/equalizing resistance resistance,
Wherein, diode drop 0.7V, equalizing resistance resistance are 33 Ω, and coefficient is defaulted as 0.9.
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Cited By (5)
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| CN108081994A (en) * | 2017-12-22 | 2018-05-29 | 珠海广通汽车有限公司 | Power supply management method and system |
| CN110196396A (en) * | 2019-04-11 | 2019-09-03 | 汉腾汽车有限公司 | A kind of new-energy automobile power battery BMS system mode calibration algorithm |
| CN111075627A (en) * | 2019-12-23 | 2020-04-28 | 一汽解放汽车有限公司 | Control method and device for vehicle starter and vehicle |
| CN111231765A (en) * | 2020-02-28 | 2020-06-05 | 浙江南都鸿芯动力科技有限公司 | Power battery balance control method |
| CN111251943A (en) * | 2020-03-17 | 2020-06-09 | 上海度普新能源科技有限公司 | Battery pack balancing method and device |
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