CN109927590A - A kind of battery control system, control method and electric automobile air-conditioning system - Google Patents
A kind of battery control system, control method and electric automobile air-conditioning system Download PDFInfo
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- CN109927590A CN109927590A CN201811377553.3A CN201811377553A CN109927590A CN 109927590 A CN109927590 A CN 109927590A CN 201811377553 A CN201811377553 A CN 201811377553A CN 109927590 A CN109927590 A CN 109927590A
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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
Abstract
The present invention discloses a kind of battery control method, control system and electric automobile air-conditioning system, obtains the equalization index of single battery；Judge whether equalization index is greater than equalization index setting value, equilibrium if it is is carried out to the single battery, whether equilibrium is needed to judge single battery, can be improved the charge efficiency of battery.
Description
This application claims in submission on December 18th, 2017 Patent Office of the People's Republic of China, application No. is 201711365055.2, invention
A kind of priority of the Chinese patent application of entitled " battery control system, control method and electric automobile air-conditioning system ",
Entire contents are hereby incorporated by reference in the application.
Technical field
The present invention relates to battery technology field more particularly to a kind of control methods of battery, control system and electric car
Air-conditioning system.
Background technique
Power battery provides power for electric car and electric automobile air-conditioning system, and power battery includes multiple batteries
Packet, battery pack include multiple single batteries, the single battery series connection of battery pack.It is each as battery pack uses the extension of time
Difference can be generated between single battery, e.g., monomer battery voltage may be different.Monomer battery voltage is different, can result in battery
Working life reduce, it is therefore necessary to above-mentioned technology is improved, to advantageously account for above-mentioned technical problem.
Summary of the invention
The present invention provides the control method, control system and electric automobile air-conditioning system of a kind of battery, can judge monomer
Whether battery needs equilibrium, to be conducive to improve battery working time.
A kind of battery control method is applied to battery control system, and the battery control system includes battery, voltage measurement
Circuit and controller, the battery include multiple battery packs, and multiple battery packs are arranged in series, and the battery pack includes multiple
Single battery, multiple single batteries are arranged in series, and the tension measuring circuit is electrically connected with single battery, and the voltage is surveyed
Amount circuit is electrically connected with the controller, and the battery control method includes:
Voltage, the quantity of electric charge for obtaining the single battery obtain the average voltage and monomer electricity of the single battery
The mean charge amount in pond；
According to the voltage of the single battery, the average voltage of the quantity of electric charge and the single battery and monomer electricity
The mean charge amount in pond obtains the equalization index of the single battery；
The equalization index of the single battery and the relationship of equalization index setting value are judged, if the single battery is equal
The index that weighs is greater than equalization index setting value, and it is balanced to determine that the controller needs to carry out the single battery；Or according to institute
The equalization index size for stating single battery is ranked up, the n single batteries before filtering out, and determines the controller needs pair
The preceding n single batteries carry out balanced.
A kind of battery control system, the battery control system include battery, tension measuring circuit and controller, the electricity
Pond includes multiple battery packs, and multiple battery packs are arranged in series, and the battery pack includes multiple single batteries, multiple lists
Body battery is arranged in series, and the tension measuring circuit is electrically connected with single battery, the tension measuring circuit and the controller
Electrical connection；
The controller can obtain voltage, the single battery of the single battery according to the tension measuring circuit
The quantity of electric charge, single battery described in battery pack average voltage and the average quantity of electric charge；The controller is according to the monomer electricity
The average voltage of single battery in battery pack described in the voltage in pond, the quantity of electric charge of the single battery and the battery pack
The equalization index of the single battery is obtained with the average quantity of electric charge；The equalization index and equalization index for judging the single battery are set
The relationship of definite value, the controller judge that the equalization index of the single battery is greater than equalization index setting value, determine the control
Device processed needs to carry out the single battery balanced；
Or the controller is ranked up according to the equalization index size of the single battery, before filtering out described in n
It is balanced to determine that the controller needs to carry out the preceding n single batteries for single battery.
A kind of electric automobile air-conditioning system, including battery control system, compressor, condenser, restricting element and evaporation
Device, the compressor, the condenser, the restricting element and the evaporator are accordingly connected to, the battery and the pressure
Contracting mechatronics, the battery can drive compressor operation；
The battery control system includes battery, tension measuring circuit and controller, and the battery includes multiple battery packs,
Multiple battery packs are arranged in series, and the battery pack includes multiple single batteries, and multiple single batteries are arranged in series；
The controller can obtain voltage, the single battery of the single battery according to the tension measuring circuit
The quantity of electric charge, single battery described in battery pack average voltage and the average quantity of electric charge；The controller is according to the monomer electricity
The average voltage of single battery in battery pack described in the voltage in pond, the quantity of electric charge of the single battery and the battery pack
The equalization index of the single battery is obtained with the average quantity of electric charge；The equalization index and equalization index for judging the single battery are set
The relationship of definite value, the controller judge that the equalization index of the single battery is greater than equalization index setting value, determine the control
Device processed needs to carry out the single battery balanced；
Alternatively, the controller is ranked up according to the equalization index size of the single battery, before filtering out described in n
It is balanced to determine that the controller needs to carry out the preceding n single batteries for single battery.
Battery control system, control method and electric automobile air-conditioning system provided in an embodiment of the present invention, judge monomer
The equalization index of battery and the relationship of equalization index setting value, when the equalization index of single battery is greater than equalization index setting value,
Or the corresponding single battery of screening, controller carries out equilibrium to corresponding single battery, by whether needing balanced progress to battery
Judgement is conducive to improve battery working time.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in invention, for those of ordinary skill in the art, without creative efforts,
It can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the flow diagram for the battery control method that first embodiment of the invention provides；
Fig. 2 is the signal of relationship between voltage and the quantity of electric charge when single battery that first embodiment of the invention provides dispatches from the factory
Figure；
Fig. 3 is the flow diagram for the battery control method that second embodiment of the invention provides；
Fig. 4 is the battery control method flow diagram that third embodiment of the invention provides；
The signal of corresponding relationship of the Fig. 5 between the third embodiment of the invention single battery temperature provided and correction factor
Figure；
Fig. 6 is the structural schematic diagram for the battery control system that fourth embodiment of the invention provides；
The schematic diagram for the balanced circuit that the position Fig. 7 fourth embodiment of the invention provides.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only this
Invention a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art exist
Every other embodiment obtained under the premise of creative work is not made, shall fall within the protection scope of the present invention.
It is balanced not only related with the voltage of single battery whether single battery needs, also with the quantity of electric charge of single battery, with
And the average voltage of single battery is related with the average quantity of electric charge in battery pack.If only judging monomer by the voltage of single battery
Battery whether need it is balanced be possible to less accurate, and influence automobile course continuation mileage be battery the quantity of electric charge, rather than it is electric
The voltage in pond, therefore Multiple factors are integrated to judge whether single battery needs equilibrium then can be more accurate.
Based on this, in embodiments of the present invention, single battery equalization index is introduced, single battery is judged by equalization index
Whether equilibrium is needed, due to the average electricity of single battery in the voltage of equalization index and single battery, the quantity of electric charge and battery pack
Pressure is related with the average quantity of electric charge, therefore, multiple influence factors is combined when judging whether single battery needs equilibrium, rather than
Only determine whether the single battery needs equilibrium by the voltage of single battery, therefore, method provided in an embodiment of the present invention, energy
More accurately judge whether single battery needs equilibrium.It is corresponding balanced to need balanced single battery to carry out, to mention
The charge efficiency of high batteries of electric automobile and the service life for extending batteries of electric automobile.
First embodiment
Referring to Fig. 1, which is the flow diagram of battery control method provided in this embodiment.
Battery control method provided in this embodiment, includes the following steps:
S101: obtaining voltage, the quantity of electric charge of single battery, obtains the average voltage and the average quantity of electric charge of single battery.
It should be noted that the power battery of electric car includes multiple battery packs by taking the battery of electric car as an example, by
In electric car required voltage be several hectovolts, it is therefore desirable to multiple battery packs be cascaded for automobile power supply power is provided.
Each battery pack includes that multiple single batteries are cascaded, and single battery includes that multiple single batteries are in parallel, due to multiple lists
Batteries are connected in parallel to form a single battery, therefore the voltage for the multiple single batteries being connected in parallel is equal.Specifically
Ground can obtain the voltage of single battery by tension measuring circuit, which includes voltage measurement chip.
The quantity of electric charge referred in the present embodiment refers to the residual charge amount (State Of Charge, SOC) of single battery.
It should be noted that quantity of electric charge when single battery dispatches from the factory is related with the voltage of single battery, specifically, reference can be made to
Fig. 2, Fig. 2 are the schematic diagram of relationship between voltage and quantity of electric charge when single battery provided in this embodiment dispatches from the factory.Wherein, abscissa
For the voltage (unit: millivolt) of single battery, ordinate is the quantity of electric charge (unit: coulomb).
When single battery use a period of time after, the quantity of electric charge is just not only related with the voltage of single battery, also with
The single battery it is current related.
Therefore, in the present embodiment, for the single battery just to have dispatched from the factory, the pass between its quantity of electric charge and voltage can be passed through
System obtains the quantity of electric charge of the single battery.For having used the single battery of a period of time, the electricity of single battery can be passed through
It presses with electric current and obtains the quantity of electric charge of the single battery.
It should be noted that the electric current of single battery can be obtained by current transformer, current transformer be can be set
In tension measuring circuit.Since battery pack includes that multiple single batteries are cascaded, the total electric current of battery pack is exactly every
The electric current of a single battery.
In the present embodiment, the acquisition pattern of the average voltage of single battery can there are many.
As an example, the average voltage of single battery is by the total voltage of battery pack divided by single battery in the battery pack
Quantity obtain.
For example, a battery pack includes 10 single batteries, the total voltage of battery pack is V0, then, single battery is put down
Equal voltage is V0Divided by 10, i.e. 0.1*V0。
In the present embodiment, the acquisition pattern of the mean charge amount of single battery can there are many.
As an example, the mean charge amount of single battery is by the total charge dosage of battery pack divided by monomer in the battery pack
The quantity of battery obtains.
For example, a battery pack includes 10 single batteries, the total charge dosage of battery pack is S0, then, single battery
Mean charge amount is S0Divided by 10, i.e. 0.1*S0。
S102: it is averaged by the average voltage and single battery of the voltage of the single battery, the quantity of electric charge and single battery
The quantity of electric charge obtains the equalization index of the single battery.
As an example, the equalization index of single battery can specifically be obtained by following formula (1):
Q=(V1*A-V2*B)+(S1*C-S2*D) %100 (1)
Wherein, Q is equalization index, and V1 indicates that the voltage of single battery, V2 indicate the average electricity of single battery in battery pack
Pressure, S1 indicate that the quantity of electric charge of single battery, S2 indicate the mean charge amount of single battery in battery pack；A, B, C and D are to be less than
1 but close to 1 predetermined coefficient, which can be by demarcating acquisition in advance.
The Q calculated using formula (1) can be the value less than 1, or the value greater than 1.
S103: judging whether equalization index is greater than equalization index setting value, if it is, determine need to the single battery into
Row is balanced.
Equalization index setting value is a pre-set numerical value, when the equalization index of single battery is greater than the equalization index
When setting value, it is believed that the single battery needs equilibrium.As an example, the value range of equalization index setting value can be 1-
1.2。
It should be noted that equalization index be greater than equalization index setting value single battery carry out equilibrium may include it is following
Two kinds of situations.
The first situation, the equalization index of single battery and the difference of equalization index setting value are set greater than the first difference
Value.In this case, it is believed that the equalization index of the single battery is excessively high, in general, the equalization index of single battery
It is excessively high, illustrate that the voltage of the single battery is also excessively high, needs to carry out equalization discharge to the single battery at this time.It specifically, can be with
It is discharged by resistance.For example, the first difference threshold is 0.2, when the equalization index and equalization index setting value of single battery
Difference be greater than 0.2 when, by resistance to the single battery carry out equalization discharge.
The difference of second situation, the equalization index of single battery and equalization index setting value less than the second difference threshold,
In this case, it is believed that the equalization index of single battery is relatively low, and in general, the equalization index of single battery compares
When low, illustrate that the voltage of the single battery may be relatively low, at this point, single battery is in under-voltage condition, it may not be possible to normal again
Work, should provide the prompt of battery cell failure at this time.For example, the first difference threshold is 0.1, when the equilibrium of single battery refers to
When several and equalization index setting value difference is less than 0.1, the prompt of the battery cell failure is provided.
It should be noted that the second difference threshold can also be equal to the first difference threshold less than the first difference threshold.
It is only exemplary above for example, the specific value of the first difference threshold and the second difference threshold can be according to the actual situation
Setting.
It should be noted that all single batteries of the above method suitable for all battery packs.
Battery control method provided in this embodiment, introduces single battery equalization index, judges monomer by equalization index
Whether battery needs equilibrium, due in the voltage of equalization index and single battery, the quantity of electric charge and battery pack single battery it is flat
Equal voltage is related with the average quantity of electric charge, therefore, multiple influence factors is combined when judging whether single battery needs equilibrium, and
It is not only to determine whether the single battery needs equilibrium by the voltage of single battery, therefore, method provided in this embodiment, energy
More accurately judge whether single battery needs equilibrium.It is corresponding balanced to need balanced single battery to carry out, to mention
The charge efficiency of high battery and the service life for extending battery.
It is understood that the performance of battery may be declined with the growth of service time of battery, needed in battery
The quantity for carrying out balanced single battery may be relatively more, but need balanced single battery to the desirability of equilibrium not
Equally, and in practical applications, on the one hand, for it is each need balanced single battery carries out it is balanced may time-consuming it is more long,
So, entire charging process also can be time-consuming more long.On the other hand, balanced single battery is needed to carry out equilibrium to be each
It is too high to will lead to heat, heat, which can not be distributed all, leads to hardware damage, to influence the service life of battery.Therefore,
The service life of the charge efficiency of battery and battery in order to balance, the present embodiment also provide a kind of control method of battery, to need
Balanced single battery is wanted to be ranked up according to its equalization index, the single battery for selecting a portion equalization requirement high carries out
It is balanced.
In other embodiments, S103: controller can also be ranked up according to the equalization index size of single battery, screening
The preceding biggish single battery of n equalization index out determines that controller needs to carry out equilibrium to preceding n single battery, and n is default
Integer.The step is not provided with equalization index threshold value, and controller can directly screen corresponding single battery and carry out equilibrium, relatively
Simplified control process.
When controller carries out balanced to single battery, controller can carry out equilibrium to a selected single battery,
Equilibrium can be carried out simultaneously at least two.
Following second embodiment following will be introduced this method in conjunction with attached drawing.
Second embodiment
Referring to Fig. 3, which is the flow chart of the control method of battery provided in this embodiment.
The control method of battery provided in this embodiment carries out the described single battery in first embodiment S103 equal
Before weighing apparatus, it can also include the following steps:
S301: all single batteries that equalization index is greater than equalization index setting value are arranged according to equalization index size
Sequence forms the first battery sequence.
It should be noted that the rule being ranked up according to equalization index size is not limited in the present embodiment, that is to say, that
Be ranked up according to equalization index size is descending be ranked up.
It should be noted that in the present embodiment, being greater than in First ray comprising all equalization index in all battery packs
The single battery of equalization index setting value.
S302: it screens preceding m single battery in the First ray and forms the second battery sequence；M is default positive integer.
S303: when judging that the single battery belongs to the second battery sequence, determine to need to carry out the single battery equal
Weighing apparatus.
About S302 and S303, it should be noted that m single battery included in the second battery sequence can consider
Be the high single battery of equalization requirement in the single battery of equilibrium in need.
M is pre-set positive integer, it is to be understood that m is less than or equal to the number of single battery in First ray.
The present embodiment does not limit the specific value of m specifically.When the monomer electricity that equalization index is greater than to equalization index setting value
The rule that pond is ranked up according to equalization index size is the then preceding m single battery in First ray by greatly to when small sequence
Equalization index is relatively high, can carry out equalization discharge to preceding m single battery.
It should be noted that in practical applications, in some environments, single battery may can not work normally, i.e., without
The normal charge and discharge of method.For example, the too low temperature for leading to single battery of environment temperature is too low, alternatively, environment temperature is excessively high to lead to list
The temperature of body battery is excessively high.
In view of there is such case in practice, in first embodiment S103 determine need to the described single battery into
It can also include the temperature for acquiring the single battery before row is balanced, judge whether the temperature of the single battery is pre- first
If in temperature range, if so, just judging whether the single battery needs to carry out equilibrium.If otherwise not needing to carry out the application
The method that above embodiments provide.
It should be noted that the temperature of single battery can be acquired by temperature sensor.
It should be noted that the first preset temperature range is preset reference temperature, which may be considered monomer
Battery can normal charge and discharge when corresponding temperature range.As an example, the first preset temperature range can be set to (10
DEG C, 45 DEG C).
When the temperature of single battery is in the first preset temperature range, it is possible to determine that need to carry out single battery equal
Weighing apparatus.
When the temperature of single battery is not in the first preset temperature range, equilibrium is not carried out to single battery, because single
Body battery at such a temperature can not normal charge and discharge, it is carried out balanced being also unnecessary.
The control method of battery provided in this embodiment, before determining to need to carry out equilibrium to single battery, to needs
Balanced single battery is ranked up according to its equalization index, and the single battery for selecting a portion equalization requirement high carries out equal
Weighing apparatus, rather than equilibrium is carried out to the single battery of institute's equilibrium in need, shorten it is balanced to single battery used in the time,
The charge efficiency of battery and the service life of battery are taken into account.In addition, also judging before carrying out equilibrium to single battery
The single battery whether be in can normal charge and discharge state, to cannot normal charge and discharge single battery, without
Equilibrium avoids unnecessary equalization operation.
It is understood that in practical applications, single battery has corresponding operating ambient temperature, also, environment temperature
Difference, the discharge capability of single battery also can be different.In general, corresponding single battery discharge capability ratio when environment temperature is low
Corresponding discharge capability is weak when environment temperature is high.
And the discharge capability of single battery is related with the quantity of electric charge of single battery, the quantity of electric charge will affect the equilibrium of single battery
Index.Therefore, environment temperature locating for single battery will affect the equalization index of single battery.
In consideration of it, this implementation also provides a kind of control method of battery, according to the temperature of single battery to the single battery
Equalization index is modified.More accurately whether single battery can be judged using the equalization index of revised single battery
Need equilibrium.
Following 3rd embodiment will be introduced this method in conjunction with attached drawing.
3rd embodiment
Referring to fig. 4, which is the control method flow chart of battery provided in this embodiment.
The control method of battery provided in this embodiment, includes the following steps:
S401: the average voltage peace of single battery in the voltage, the quantity of electric charge and the battery pack of single battery is obtained
The equal quantity of electric charge.
S402: by single battery in the voltage of the single battery, the quantity of electric charge and the battery pack average voltage and
Mean charge amount obtains the equalization index of the single battery.
S401-S402 is identical as the S101-S102 in first embodiment, and specific descriptions may refer in first embodiment
The description of S401-S402, details are not described herein.
S403: the temperature of the single battery is acquired.
Environment temperature locating for the single battery is characterized by acquiring the temperature of single battery in the present embodiment.It can be with
The temperature of battery pack is acquired by temperature sensor.
It should be noted that S403 is executed before S404 in the present embodiment, it is not necessary to limit S403 after S402
It executes, that is to say, that S403 can also be executed before S401, can also be executed between S401 and S402.
S404: the temperature of the single battery is judged in the second preset temperature range, according to the temperature of the single battery
Degree is modified the equalization index of the single battery.
Second preset temperature range refers to the corresponding operating ambient temperature of single battery.For example, the second preset temperature can be with
It is set as (10 DEG C, 45 DEG C).
Specific reality is modified according to equalization index of the temperature of the single battery to the single battery in the present embodiment
Now, the voltage of single battery can be compensated according to the temperature of single battery, then utilizes compensated single battery
Voltage substitutes into formula (1) weighted value for calculating the single battery.
The concrete mode compensated according to voltage of the temperature of single battery to single battery are as follows:
After compensation before voltage=compensation of single battery single battery voltage+0.0015*K.
Wherein, the unit of the voltage of single battery is millivolt after compensation, and the voltage of single battery is to obtain in S401 before compensating
Voltage, the K of the single battery obtained are correction factor, and the corresponding relationship between single battery temperature and correction factor can be such as figure
Corresponding relationship shown in 5.
For example, corresponding adjusted coefficient K is 60, then when the temperature of single battery is 20 DEG C:
Single battery before the voltage+0.0015*60=of single battery is compensated before voltage=compensation of single battery after compensation
Voltage+0.09
That is, the voltage of single battery is 0.09 millivolt higher than the voltage of single battery before compensating after compensation.
S405: judging whether revised equalization index is greater than equalization index setting value, if it is determines to need to this
Single battery carries out balanced.
It is understood that can use the revised equilibrium after being modified to the equalization index of single battery
Index judges whether single battery needs equilibrium.
The environment temperature as locating for single battery will affect the equalization index of single battery, in the present embodiment, according to
The temperature of single battery is modified the single battery equalization index.The equalization index of revised single battery considers list
The environment temperature of body battery, therefore single battery can be more accurately judged using the equalization index of revised single battery
Whether equilibrium is needed.
Control method based on the battery that above embodiments provide, the embodiment of the present invention also provide a kind of battery control system
System.Following fourth embodiment will introduce the control system of the battery in conjunction with attached drawing.
Fourth embodiment
Referring to Fig. 6, which is the structural schematic diagram of battery control system provided in this embodiment.
Battery control system provided in this embodiment, comprising: battery, tension measuring circuit 610, controller 620 and equilibrium
Circuit 630, battery include multiple battery packs, and multiple battery packs are arranged in series, and battery pack includes multiple single batteries, multiple monomers
Battery is arranged in series；Tension measuring circuit 610 is electrically connected with single battery, and tension measuring circuit 610 is electrically connected with controller 620
It connects.
The tension measuring circuit 610, for obtaining the voltage of single battery；
Specifically, tension measuring circuit 610 can be realized by special voltage measurement chip.
The controller 620, for obtaining the quantity of electric charge and single battery of single battery according to the voltage of single battery
Average voltage and the average quantity of electric charge；By the average voltage of the voltage of the single battery, the quantity of electric charge and the single battery
The equalization index of the single battery is obtained with the average quantity of electric charge；Judge whether the equalization index is greater than equalization index setting value；
When the controller 620 judges that the equalization index is greater than equalization index setting value, the equalizing circuit 630 is controlled
The single battery is carried out balanced.
Battery control system provided in this embodiment, introduces single battery equalization index, judges monomer by equalization index
Whether battery needs equilibrium, due in the voltage of equalization index and single battery, the quantity of electric charge and battery pack single battery it is flat
Equal voltage is related with the average quantity of electric charge, therefore, multiple influence factors is combined when judging whether single battery needs equilibrium, and
It is not only to determine whether the single battery needs equilibrium by the voltage of single battery, therefore, side provided in an embodiment of the present invention
Method can more accurately judge whether single battery needs equilibrium, corresponding balanced to need balanced single battery to carry out,
To improve the service life of battery.
Optionally, the controller 620 is also used to: equalization index is greater than to all single batteries of equalization index setting value
It is ranked up to form the first battery sequence according to equalization index size；Screen preceding m single battery in the first battery sequence
Form the second battery sequence；M is default positive integer；When judging that the single battery belongs to the second battery sequence, just determine
Controller need to be balanced to carrying out to the single battery.
For example, the first battery sequence includes 50 single batteries, but the hardware condition based on power battery pack, while not
50 single batteries may be carried out with equilibrium, such as equilibrium is carried out to each battery in First ray and will lead to heat too
Height, heat, which can not be distributed all, leads to hardware damage.Therefore, only determining in the present embodiment need to be in the first battery sequence
Preceding m single battery carries out balanced.
Optionally, the system also includes:
First group of temperature sensor 640, the corresponding first group of temperature sensor 640 of a battery pack, institute
The corresponding single battery of each temperature sensor in first group of temperature sensor 640 is stated, for acquiring corresponding monomer
The temperature of battery；
Whether the controller 620 is also used to judge the temperature of single battery in the first preset temperature range；Work as judgement
When the temperature of the single battery is in first preset temperature range, determine to need to carry out the single battery balanced.
As an example, each of described first group of temperature sensor 640 temperature sensor has an ID, can
With understanding, since a temperature sensor is corresponding with a single battery, the ID of temperature sensor can also be regarded as
It is the ID of single battery.
After each temperature sensor detects the temperature of corresponding single battery, the temperature value that will test is sent
To the controller 620, the controller 620 can be according to the temperature value of the ID and sensor of the temperature sensor detection
To determine the temperature of each single battery whether in the first preset temperature range.
When controller 620 judges that the temperature of the single battery is in first preset temperature range, to balanced electricity
Road 630 sends equalization instruction, may include the ID for needing the balanced corresponding temperature sensor of single battery in the equalization instruction,
After equalizing circuit 630 receives equalization instruction, according to the temperature sensor ID carried in the equalization instruction to corresponding monomer
Battery carries out balanced.
As another example, each single battery has a mark.
After each temperature sensor detects the temperature of corresponding single battery, temperature value and this that will test
The mark of single battery is sent to the controller 620, the controller 620 can according to the mark of the single battery and
Whether the temperature value of temperature sensor detection determines the temperature of each single battery in the first preset temperature range.
When controller 620 judges that the temperature of the single battery is in first preset temperature range, to balanced electricity
Road 630 sends equalization instruction, may include the mark for needing balanced single battery in the equalization instruction, and equalizing circuit 630 connects
After equalization instruction, corresponding single battery is carried out according to the mark of the single battery carried in the equalization instruction equal
Weighing apparatus.
Description can be with reference to the description of related content in second embodiment, herein no longer as described in the first preset temperature range
It repeats.
Optionally, the controller 620 is also used to judge the temperature of the single battery in the second preset temperature range
When, it is modified according to equalization index of the temperature of the single battery to the single battery；Judge revised equalization index
Whether equalization index setting value is greater than.
Description can be with reference to the description of related content in 3rd embodiment, herein no longer as described in the second preset temperature range
It repeats.
The environment temperature as locating for single battery will affect the equalization index of single battery, in the present embodiment, according to
The temperature of single battery is modified the single battery equalization index.The equalization index of revised single battery considers list
The environment temperature of body battery, therefore single battery can be more accurately judged using the equalization index of revised single battery
Whether equilibrium is needed.
Optionally, the corresponding equalizing circuit 630 of each single battery；
The equalizing circuit 630 includes resistance and switch, which includes electronic switch, such as triode.
The resistance is by the switch in parallel at the both ends of the single battery；
The controller 620 carries out equalization discharge to the preceding m single battery for controlling the equalizing circuit 630
Specifically:
For controlling the switch conduction, so that the single battery carries out equilibrium by the conductive discharge.
Specifically, it can refer to Fig. 7, which is the schematic diagram of equalizing circuit provided in this embodiment.
Fig. 7 shows the equalizing circuit connection type of each single battery in a battery pack, with a battery pack in Fig. 7
Including being introduced for 6 single batteries, it is not particularly limited as 6 certainly.
Wherein, 701-706 indicates 6 single batteries in the battery pack.
By taking single battery 701 as an example, resistance R1 is connected in parallel on the both ends of single battery 701 by switch SW0 and SW1, works as list
When body battery 701 needs to carry out equalization discharge, controller control switch SW0 and SW1 are both turned on, so that the single battery 701 is logical
It crosses resistance R1 and carries out equalization discharge.Other monomers battery needs principle when equalization discharge similar, and this is no longer going to repeat them.
The resistance value of resistance R1-R6 can be equal, can also be unequal.
In addition, the resistance value of resistance R1-R6 can be pre-set fixed resistance value.
Based on the battery control system that fourth embodiment provides, it includes above-mentioned battery control system that the present embodiment, which also provides a kind of,
The electric automobile air-conditioning system of system.
Electric automobile air-conditioning system provided in this embodiment, including compressor, condenser, restricting element and evaporator,
Compressor, condenser, restricting element and evaporator are accordingly connected to, and electric automobile air-conditioning system further includes above-mentioned battery control system
System, above-mentioned battery control system is for managing battery, battery and compression mechatronics, and battery is for driving compressor operation.On
Stating battery control system can be set in air-conditioner controller, be also possible to an autonomous system, and electric automobile air-conditioning system passes through
Battery control system can the single battery in accurate judgement battery whether need equilibrium, and for need balanced single battery into
Row is balanced, to improve battery working time, to be conducive to improve the service life of electric automobile air-conditioning system.
The above described is only a preferred embodiment of the present invention, being not intended to limit the present invention in any form.Though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the 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 solution makes many possible changes and modifications or equivalent example modified to equivalent change.Therefore, it is all without departing from
The content of technical solution of the present invention, according to the technical essence of the invention any simple modification made to the above embodiment, equivalent
Variation and modification, all of which are still within the scope of protection of the technical scheme of the invention.
Claims (11)
1. a kind of battery control method, is applied to battery control system, the battery control system includes battery, voltage measurement electricity
Road and controller, the battery include multiple battery packs, and multiple battery packs are arranged in series, and the battery pack includes multiple lists
Body battery, multiple single batteries are arranged in series, and the tension measuring circuit is electrically connected with single battery, the voltage measurement
Circuit is electrically connected with the controller, and the battery control method includes:
The voltage, the quantity of electric charge that obtain the single battery obtains the average voltage and the single battery of the single battery
Mean charge amount；
According to the voltage of the single battery, the average voltage of the quantity of electric charge and the single battery and the single battery
Mean charge amount obtains the equalization index of the single battery；
The equalization index of the single battery and the relationship of equalization index setting value are judged, if the equilibrium of the single battery refers to
Number is greater than equalization index setting value, and it is balanced to determine that the controller needs to carry out the single battery；Or according to the list
The equalization index size of body battery is ranked up, and the n single batteries before filtering out determine that the controller is needed to preceding n
A single battery carries out balanced.
2. battery control method according to claim 1, which is characterized in that step " according to the voltage of the single battery,
The mean charge amount of the average voltage and the single battery of the quantity of electric charge and the single battery obtains the single battery
Equalization index " includes: the equalization index that the single battery is obtained by following formula:
Q=(V1*A-V2*B)+(S1*C-S2*D) %100；
Wherein, Q is equalization index, and V1 indicates that the voltage of single battery, V2 indicate that the average voltage of single battery, S1 indicate monomer
The quantity of electric charge of battery, S2 indicate the mean charge amount of single battery；A, B, C and D are predetermined coefficient.
3. battery control method according to claim 1 or 2, which is characterized in that " judge the single battery in step
The relationship of equalization index and equalization index setting value " and step " it is equal to determine that the controller needs to carry out the single battery
Before weighing apparatus " between further include: the single battery that equalization index is greater than equalization index setting value is pressed greatly according to equalization index
It is small to be ranked up, to form the first battery sequence；
Preceding m single battery in the first battery sequence is screened, sets the second battery sequence for the preceding m single battery
Column, m are default positive integer；
When judging that the single battery belongs to the second battery sequence, determine that the controller is needed to the preceding m monomers
Battery carries out balanced.
4. battery control method according to claim 1 to 3, which is characterized in that " determine the controller in step
Need to carry out the single battery balanced " before further include:
Acquire the temperature of the single battery；
Judge that the temperature of the single battery and the relationship of the first preset temperature range, first preset temperature range are setting
Value.
5. battery control method according to claim 4, which is characterized in that " judge the equal of the single battery in step
Before the relationship of weighing apparatus index and equalization index setting value " further include: acquire the temperature of the single battery；Judge the monomer electricity
When the temperature in pond is in the second preset temperature range, according to the temperature of the single battery to the equalization index of the single battery
It is modified, second preset temperature range is setting value；
Step " judging the equalization index of the single battery and the relationship of equalization index setting value, " further include: after judgement amendment
Equalization index whether be greater than the equalization index setting value.
6. a kind of battery control system, the battery control system includes battery, tension measuring circuit and controller, the battery
Including multiple battery packs, multiple battery packs are arranged in series, and the battery pack includes multiple single batteries, multiple monomers
Battery is arranged in series, and the tension measuring circuit is electrically connected with single battery, the tension measuring circuit and controller electricity
Connection；
The controller can obtain the electricity of the voltage of the single battery, the single battery according to the tension measuring circuit
The average voltage of single battery described in lotus amount, battery pack and the average quantity of electric charge；The controller is according to the single battery
The average voltage peace of single battery in battery pack described in voltage, the quantity of electric charge of the single battery and the battery pack
The equal quantity of electric charge obtains the equalization index of the single battery；Judge the equalization index and equalization index setting value of the single battery
Relationship, the controller judge the single battery equalization index be greater than equalization index setting value, determine the controller
It needs to carry out the single battery balanced；
Or the controller is ranked up according to the equalization index size of the single battery, the n monomers before filtering out
It is balanced to determine that the controller needs to carry out the preceding n single batteries for battery.
7. battery control system according to claim 6, which is characterized in that " controller is according to the single battery
Voltage, the single battery the quantity of electric charge and the battery pack described in battery pack the average voltage of single battery and
Mean charge amount obtains the equalization index of the single battery " it include: that the controller by following formula obtains the monomer
The equalization index of battery:
Q=(V1*A-V2*B)+(S1*C-S2*D) %100；
Wherein, Q is equalization index, and V1 indicates that the voltage of single battery, V2 indicate the average voltage of single battery in battery pack, S1
Indicate that the quantity of electric charge of single battery, S2 indicate the mean charge amount of single battery in battery pack；A, B, C and D are predetermined coefficient.
8. battery control system according to claim 6 or 7, which is characterized in that " judging the equilibrium of the single battery
The relationship of index and equalization index setting value " and " determine that the controller need balanced to single battery progress before " it
Between further include: the controller presses the single battery that equalization index is greater than equalization index setting value greatly according to equalization index
It is small to be ranked up, to form the first battery sequence；
The controller screens preceding m single battery in the first battery sequence, sets for the preceding m single battery
Two battery sequences, m are default positive integer；
When judging that the single battery belongs to the second battery sequence, determine that the controller is needed to the preceding m monomers
Battery carries out balanced.
9. battery control system according to claim 8, which is characterized in that the battery control system further includes first group
Temperature sensor, the corresponding first group of temperature sensor of the battery pack, in first group of temperature sensor
The corresponding single battery of each temperature sensor, for acquiring the temperature of the corresponding single battery；
Before the controller is balanced to the single battery, the controller judges that the temperature of the single battery is pre- first
If in temperature range or in the second preset temperature range；If the temperature of the single battery is in first preset temperature range
Interior, the controller can carry out the single battery balanced；If the temperature of the single battery is in the described second default temperature
It spends in range, the controller is modified the equalization index of the single battery according to the temperature of the single battery, institute
It states controller and judges whether revised equalization index is greater than equalization index setting value.
10. battery control system according to claim 8 or claim 9, which is characterized in that the battery control system further includes equal
Weigh circuit group, and the equalizing circuit group includes multiple equalizing circuits, and the equalizing circuit group is electrically connected with the battery pack, described
Equalizing circuit group is electrically connected with the controller, each corresponding equalizing circuit of the single battery；The balanced electricity
Road includes resistance and switch, and the resistance is in parallel with the both ends of the single battery by the switch；
The battery control method further includes that the controller controls the equalizing circuit to single battery progress equilibrium, institute
Stating controller and controlling the equalizing circuit to carry out equilibrium to the single battery includes: that the controller controls the corresponding switch
Conducting, the single battery pass through the corresponding conductive discharge.
11. a kind of electric automobile air-conditioning system, including battery control system, compressor, condenser, restricting element and evaporation
Device, the compressor, the condenser, the restricting element and the evaporator are accordingly connected to, the battery and the pressure
Contracting mechatronics, the battery can drive compressor operation；
The battery control system includes battery, tension measuring circuit and controller, and the battery includes multiple battery packs, multiple
The battery pack is arranged in series, and the battery pack includes multiple single batteries, and multiple single batteries are arranged in series；
The controller can obtain the electricity of the voltage of the single battery, the single battery according to the tension measuring circuit
The average voltage of single battery described in lotus amount, battery pack and the average quantity of electric charge；The controller is according to the single battery
The average voltage peace of single battery in battery pack described in voltage, the quantity of electric charge of the single battery and the battery pack
The equal quantity of electric charge obtains the equalization index of the single battery；Judge the equalization index and equalization index setting value of the single battery
Relationship, the controller judge the single battery equalization index be greater than equalization index setting value, determine the controller
It needs to carry out the single battery balanced；
Alternatively, the controller is ranked up according to the equalization index size of the single battery, the n monomers before filtering out
It is balanced to determine that the controller needs to carry out the preceding n single batteries for battery.
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| CN201711365055 | 2017-12-18 | ||
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