CN107749500A - For battery balanced method and device - Google Patents
For battery balanced method and device Download PDFInfo
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- CN107749500A CN107749500A CN201710952070.0A CN201710952070A CN107749500A CN 107749500 A CN107749500 A CN 107749500A CN 201710952070 A CN201710952070 A CN 201710952070A CN 107749500 A CN107749500 A CN 107749500A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
-
- 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
- B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
- B60L58/21—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules having the same nominal voltage
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using 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
- 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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- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
This application discloses for battery balanced method and apparatus, it is related to cell balancing field, described device includes voltage acquisition module, temperature collect module, balanced management module and balance module.Methods described includes：Voltage acquisition module and temperature collect module obtain the status information of battery module and balance module in real time；Balanced management module analyzes and processes to above-mentioned status information, and controls balance module battery balanced to battery module startup TunePower equilibrium or discharge type according to the analysis processing result to above-mentioned status information.Pass through the above method and device, energy transfer is carried out by multiwinding transformer between battery module and cell, and only to carry out discharge type less than the cell of average voltage level to cell or magnitude of voltage of the magnitude of voltage higher than average voltage level battery balanced or TunePower is balanced for this method, realize rapidly, low-loss it is battery balanced.
Description
Technical field
The present invention relates to cell balancing field, in particular it relates to which a kind of be used for battery balanced method and device.
Background technology
With energy crisis and the aggravation of environmental pollution, the electric automobile of energy-conserving and environment-protective turns into the focus of research.Power type
Electric automobile is increasingly becoming battery is because having the advantages that energy density is high, have extended cycle life, self-discharge rate is low and pollution is small
Preferred power source.Electric powered motor source is typically made up of more piece cell by series and parallel.The parameters of cell
It is uncontrollable to completely the same in process of production, inevitably show as electricity in the presence of some small differences, these differences
Pond internal resistance, capacity, open-circuit voltage etc. it is inconsistent.With battery, discharge and recharge number increases in actual use, and temperature,
The influence of the factors such as self discharge, these differences can be exaggerated so that the performance difference between the cell of battery pack is increasingly
Greatly, so as to causing power battery pack life time decay serious.
It is battery balanced to typically refer to carry out by external Equilibrium circuit for the otherness of cell in power battery pack
Equilibrium, reach the purpose for eliminating battery inconsistency.Existing battery management system typically uses resistive dissipation formula balance policy,
I.e. in a cell both ends power resistor in parallel, pass through the logical of the balanced branch road in MOSFET management and control systems power resistor place
It is disconnected, excess energy is consumed in the form of heat by its both ends power resistor in parallel if monomer battery voltage is higher.Should
For equalization scheme in balancing procedure, power resistor can produce substantial amounts of heat, equalizing circuit temperature may be caused too high, and restrict
The increase of euqalizing current, equalization efficiency are slower；In balancing procedure, power resistor can consume the energy of cell, bring
A large amount of losses of energy.Therefore traditional equalization methods can not realize that quick, low-loss is balanced, it is desirable to provide new method is realized
It is battery balanced.
The content of the invention
It is used for battery balanced method and device it is an object of the invention to provide a kind of, this method or device can be intelligently
Non-dissipative equalizing is carried out to battery module, effectively eliminates the inconsistency between cell.
To achieve these goals, on the one hand, embodiments of the present invention, which provide, a kind of is used for battery balanced side
Method, this method include：
Gather the magnitude of voltage of each cell of battery module；
Calculate the voltage difference between highest monomer battery voltage and minimum monomer battery voltage；
Judge whether voltage difference is more than first voltage difference threshold value；
In the case where judging that voltage difference is more than first voltage difference threshold value, permit starting battery balanced process；
Start battery balanced process；
Judge whether voltage difference is less than second voltage difference threshold value；
In the case where judging that voltage difference is less than second voltage difference threshold value, terminate balancing procedure.
Preferably, also include for battery balanced method：
Gather the temperature value of battery module and the temperature value of balance module；
Judge whether the temperature value of battery module and the temperature value of balance module are respectively smaller than respective first temperature threshold；
Judging that the temperature value of battery module and the temperature value of balance module be respectively smaller than respective first temperature threshold
In the case of, permit starting battery balanced process.
Preferably, also include for battery balanced method：
During battery balanced, judge battery module temperature value and balance module temperature value whether be more than it is respective
Second temperature threshold value；
It is more than the situation of respective second temperature threshold value in the temperature value for judging the temperature value of battery module or balance module
Under, stop battery balanced process.
Preferably, also include for battery balanced method：
Calculate the average voltage of the cell in battery module；
The first number and magnitude of voltage that magnitude of voltage is calculated higher than the cell of average voltage are less than average voltage
Cell the second number；
By the first number compared with the second number；
In the case where the first number is more than the second number, start TunePower balancing procedure；
In the case where the first number is less than or equal to the second number, the battery balanced process of star t-up discharge formula.
Preferably, TunePower balancing procedure includes：
The part energy of battery module is transferred to monomer electricity of the magnitude of voltage less than average voltage by balance module
Pond；
The battery balanced process of discharge type includes：
Part energy of the magnitude of voltage higher than the cell of average voltage is transferred to battery mould by balance module
Block.
On the other hand, embodiments of the present invention additionally provide it is a kind of be used for battery balanced device, the device includes：
Voltage acquisition module, for gathering the magnitude of voltage of each cell in battery module；
Balance module；
Balanced management module, equilibrium model is controlled for the magnitude of voltage of receiving voltage acquisition module collection, and according to magnitude of voltage
Block performs battery balanced process to battery module；
Wherein, controlling balance module to perform battery balanced process to battery module includes：
Calculate the voltage difference between highest monomer battery voltage and minimum monomer battery voltage；
Judge whether voltage difference is more than first voltage difference threshold value；
In the case where judging that voltage difference is more than first voltage difference threshold value, permit starting battery balanced process；
Start battery balanced process；
Judge whether voltage difference is less than second voltage difference threshold value；
In the case where judging that voltage difference is less than second voltage difference threshold value, terminate balancing procedure.
Preferably, also include for battery balanced device：
Temperature collect module, for gathering the temperature value of battery module and balance module；
Balanced management module is used for the temperature value for receiving temperature collect module collection, and controls balance module according to temperature value
Battery balanced process is performed to battery module；
Wherein, controlling balance module to perform battery balanced process to battery module includes：
Judge whether the temperature value of battery module and the temperature value of balance module are respectively smaller than respective first temperature threshold；
Judging that the temperature value of battery module and the temperature value of balance module be respectively smaller than respective first temperature threshold
In the case of, permit starting battery balanced process；
During battery balanced, judge battery module temperature value and balance module temperature value whether be more than it is respective
Second temperature threshold value；
It is more than the situation of respective second temperature threshold value in the temperature value for judging the temperature value of battery module or balance module
Under, stop battery balanced process.
Preferably, balanced management module is used for the average voltage for calculating the cell in battery module, battery module
It is less than the cell of average voltage, balanced management higher than the cell and magnitude of voltage of average voltage including magnitude of voltage
Module controls balance module to perform battery balanced process to battery module according to magnitude of voltage to be included：
The first number and magnitude of voltage that magnitude of voltage is calculated higher than the cell of average voltage are less than average voltage
Cell the second number；
By the first number compared with the second number；
In the case where the first number is more than the second number, start TunePower balancing procedure；
In the case where the first number is less than or equal to the second number, the battery balanced process of star t-up discharge formula.
Preferably, balance module includes multiwinding transformer, and multiwinding transformer includes the main line being connected with battery module
Circle and multiple secondary coils for being connected respectively with each cell, set on the balanced circuit that main coil is formed with battery module
There is an equalizer switch, be provided with the balanced branch road that the secondary coil and connected cell in multiple secondary coils are formed
Equalizer switch；
TunePower balancing procedure includes：
The part energy of battery module is transferred to magnitude of voltage by the multiwinding transformer of balance module and is less than voltage
The cell of average value；
The battery balanced process of discharge type includes：
Part energy of the magnitude of voltage higher than the cell of average voltage is transferred to electricity by multiwinding transformer
Pond module.
Pass through above-mentioned technical proposal, in the battery module that balanced management module is gathered according to the voltage acquisition module that receives
The magnitude of voltage of each cell and the battery module of temperature collect module collection and balance module temperature value control it is balanced
Module performs battery balanced process to battery module, realizes and intelligently carries out equilibrium to battery module, effectively scabbles each monomer
Inconsistency between battery.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Accompanying drawing is for providing a further understanding of the present invention, and a part for constitution instruction, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the flow chart for battery balanced method according to an embodiment of the present invention；
Fig. 2 is the flow chart for battery balanced method according to an embodiment of the present invention；
Fig. 3 is the flow chart for battery balanced method according to an embodiment of the present invention；
Fig. 4 is the flow chart for battery balanced method according to an embodiment of the present invention；
Fig. 5 is the structural representation for battery balanced device according to an embodiment of the present invention；
Fig. 6 is the structural representation for battery balanced device according to an embodiment of the present invention；
Fig. 7 shows the view of rechargeable balancing procedure；And
Fig. 8 shows the view of discharge type balancing procedure.
Embodiment
The embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The embodiment stated is merely to illustrate and explain the present invention, and is not intended to limit the invention.
Fig. 1 is the flow chart for battery balanced method according to an embodiment of the present invention.As shown in figure 1,
In one embodiment of the present invention, there is provided a kind of to be used for battery balanced method, this method can include：
In step S101, the magnitude of voltage of each cell of battery module is gathered；
In step s 102, the voltage difference between highest monomer battery voltage and minimum monomer battery voltage is calculated；
In step s 103, judge whether voltage difference is more than first voltage difference threshold value；
In the case where judging that voltage difference is more than first voltage difference threshold value, permit starting battery balanced process；
In step S104, start battery balanced process；
In step S105, after battery balanced process is started, judge whether voltage difference is less than second voltage difference threshold
Value；
In step s 106, in the case where judging that voltage difference is less than second voltage difference threshold value, terminate described equalized
Journey.
Wherein, such as can be using the magnitude of voltage of each cell of voltage acquisition module collection battery module, voltage
Acquisition module can for example include voltage acquisition chip and voltage sensor；The calculating of voltage difference, voltage difference and the first electricity
The comparison of threshold pressure differential or second voltage difference threshold value can for example realize that balanced management module for example may be used by balanced management module
To be processor；Battery balanced process can for example be performed using balance module, and balance module can for example include Multiple coil
Transformer.
First voltage difference threshold value can for example be set according to the inconsistent degree of acceptable each battery cell, the
Two voltage difference threshold values can for example determine according to the consistent degree that desired each cell reaches, such as when it is expected battery
Each cell of module reaches completely the same, then second voltage difference threshold value could be arranged to zero.
The temperature of battery module and balance module can reduce its life-span or even be burnt when too high, and in balancing procedure
Energy transfer can make battery module and balance module produce heat, and battery module can also produce heat in the process of running, therefore
It is unsuitable for starting battery balanced process in the case where the temperature of battery module and balance module itself is higher than a certain threshold value.
Fig. 2 is the flow chart for battery balanced method according to an embodiment of the present invention.As shown in Fig. 2
In one embodiment of the present invention, there is provided it is a kind of to be used for battery balanced method, this method compared with the method shown in Fig. 1,
Method shown in Fig. 2 can also include：
In step S202, the temperature value of battery module and the temperature value of balance module are gathered；
In step S205, judge the temperature value of battery module and the temperature value of balance module whether be respectively smaller than it is respective
First temperature threshold；
Judging that the temperature value of battery module and the temperature value of balance module be respectively smaller than respective first temperature threshold
In the case of, permit starting battery balanced process.
Wherein, such as temperature collect module can be used to gather the temperature value of battery module and the temperature value of balance module,
Temperature collect module can for example include temperature acquisition chip and temperature sensor, and temperature sensor can be arranged on battery module
In balance module.
It should be appreciated by those skilled in the art that step S201 and step S202 are not limited to the order shown in Fig. 2, i.e., pair
The collection of the magnitude of voltage of the cell of battery module and the no priority of collection to battery module, the temperature value of balance module
The limitation of order, can collecting temperature value after first collection voltages value, can also collection voltages value after first collecting temperature value, in this hair
In bright preferred embodiment, the collection of magnitude of voltage and temperature value can be carried out simultaneously.
Likewise, the judgement in the judgement of magnitude of voltage and step 205 to temperature value is also not necessarily limited in Fig. 2 in step S204
The order shown.In another embodiment of the present invention, the temperature value of battery module and the temperature of balance module can first be judged
Whether angle value is respectively smaller than respective first temperature threshold judges whether voltage difference is more than first voltage difference threshold value again.
In a further embodiment of the present invention, judge whether the temperature value of battery module and the temperature value of balance module are respectively smaller than each
The first temperature threshold and judge whether voltage difference can independently be carried out more than first voltage difference threshold value the two steps.
During battery balanced, it should also be taken in time when detecting that battery module or balance module temperature are too high
Thermal protection measure.Fig. 3 is the flow chart for battery balanced method according to an embodiment of the present invention.As shown in figure 3,
In one embodiment of the present invention, there is provided a kind of to be used for battery balanced method, this method and the method phase shown in Fig. 2
Than the method shown in Fig. 3 can also include：
In step S308, during battery balanced, the temperature value of battery module and the temperature value of balance module are judged
Whether respective second temperature threshold value is more than；
In step S309, it is more than the respective second temperature in the temperature value for judging the temperature value of battery module or balance module
In the case of spending threshold value, stop battery balanced process.
Battery module and respective first temperature threshold of balance module and second temperature threshold value can according to battery module and
The performance parameter (maximum temperature that can such as bear) of balance module itself determines.First temperature threshold of setting is less than the
Two temperature thresholds.
In a preferred embodiment of the invention, for stopping battery balanced mistake because of battery module or balance module overheat
The situation of journey, after battery balanced process is stopped, temperature collecting device continues to gather the temperature value of battery module and balance module,
When the temperature value of battery module and the temperature value of balance module decrease below respective first temperature threshold, restarting electricity
Pond balancing procedure, until the voltage difference between highest monomer battery voltage and minimum monomer battery voltage is poor less than second voltage
Threshold value just stops battery balanced process.
The cell of battery module includes magnitude of voltage and is less than voltage higher than the cell and magnitude of voltage of average voltage
The cell of average value, to realize the fast uniform of battery module, it is not necessary that equilibrium is carried out to each cell, as long as
Discharge type equilibrium is carried out higher than the cell of average voltage to magnitude of voltage or is less than the monomer of average voltage to magnitude of voltage
Battery carries out rechargeable balanced.
Fig. 4 is the flow chart for battery balanced method according to an embodiment of the present invention.As shown in figure 4,
In one embodiment of the present invention, there is provided it is a kind of to be used for battery balanced method, this method compared with the method shown in Fig. 3,
Method shown in Fig. 4 can also include：
In step S406, the average voltage of the cell in battery module is calculated；
In step S 407, it is low higher than the first number and magnitude of voltage of the cell of average voltage to calculate magnitude of voltage
In the second number of the cell of average voltage；
In step S408, by the first number compared with the second number；
In step S409, in the case where the first number is more than the second number, start TunePower balancing procedure；
In step S410, in the case where the first number is less than or equal to the second number, star t-up discharge formula is battery balanced
Process.
In one embodiment of the present invention, TunePower balancing procedure can include：
The part energy of battery module is transferred to the minimum monomer electricity of magnitude of voltage under current state by balance module
In the B1 of pond；
Collection cell B1 magnitude of voltage in real time；
The voltage difference between cell B1 magnitude of voltage and highest monomer battery voltage is calculated in real time；
Judge whether the voltage difference is less than second voltage difference threshold value；
In the case where judging that voltage difference is less than second voltage difference threshold value, stop the rechargeable equilibrium to cell B1
Process.
The battery balanced process of discharge type can include：
Magnitude of voltage highest cell B2 part energy is transferred to battery module by balance module；
Collection cell B2 magnitude of voltage in real time；
The voltage difference between cell B2 magnitude of voltage and minimum monomer battery voltage is calculated in real time；
Judge whether the voltage difference is less than second voltage difference threshold value；
In the case where judging that voltage difference is less than second voltage difference threshold value, the discharge type for stopping cell B2 is balanced；
After stopping to cell B1 rechargeable balancing procedure or to cell B2 discharge type balancing procedure, weight
It is new to perform step S406 to step S410, until the voltage difference between all cells in battery module is less than second
Untill voltage.
Although the method shown in Fig. 4 includes considering step S402, S405, S412 of temperature, those skilled in the art
It is appreciated that it can also implement the method for the application embodiment in the case of without these steps.At one of the application
In alternative embodiments, step S406, S407, S408 and S409 can be increased on the basis of the embodiment shown in Fig. 1
(such as instead of step S104 in Fig. 1).In addition, some steps shown in Fig. 4, such as step S401, S402, step
S404, S405 are not necessarily to perform according to the order shown in Fig. 4, and other feasible execution sequences are also applicable.
Fig. 5 is the structural representation for battery balanced device according to an embodiment of the present invention.Such as Fig. 5 institutes
Show, in one embodiment of the present invention, there is provided a kind of to be used for battery balanced device, the device can include：
Voltage acquisition module 104, for gathering the magnitude of voltage of each cell in battery module；
Balance module 103；
Balanced management module 102, the magnitude of voltage gathered for receiving voltage acquisition module 104, and controlled according to magnitude of voltage
Balance module 103 performs battery balanced process to battery module 101；
Wherein, control balance module 103 performs battery balanced process to battery module 101 to include：
Calculate the voltage difference between highest monomer battery voltage and minimum monomer battery voltage；
Judge whether voltage difference is more than first voltage difference threshold value；
In the case where judging that voltage difference is more than first voltage difference threshold value, permit starting battery balanced process；
Start battery balanced process；
Judge whether voltage difference is less than the second voltage difference threshold value；
In the case where judging that voltage difference is less than the second voltage difference threshold value, terminate balancing procedure.
Battery module 101 can be for example connected with voltage acquisition module 104, balance module 103 by wire, voltage acquisition
Module 104 can for example pass through communication bus with balanced management module 102 and balanced management module 102 and balance module 103
Connection.
Fig. 6 is the structural representation for battery balanced device according to an embodiment of the present invention.Such as Fig. 6 institutes
Show, in one embodiment of the present invention, there is provided it is a kind of to be used for battery balanced device, should except the component shown in Fig. 5
Device can also include：
Temperature collect module 105, for gathering the temperature value of battery module 101 and balance module 103；
Balanced management module 102 is used for the temperature value for receiving the collection of temperature collect module 105, and is controlled according to temperature value
Weighing apparatus module 103 performs battery balanced process to battery module 101；
Wherein, control balance module 103 performs battery balanced process to battery module 101 to include：
Judge whether the temperature value of battery module 101 and the temperature value of balance module 103 are respectively smaller than respective first temperature
Spend threshold value；
Respective first temperature is respectively smaller than in the temperature value for judging the temperature value of battery module 101 and balance module 103
In the case of threshold value, permit starting battery balanced process；
During battery balanced, judge whether the temperature value of battery module 101 and the temperature value of balance module 103 are more than
Respective second temperature threshold value；
It is more than respective second temperature threshold value in the temperature value for judging the temperature value of battery module 101 or balance module 103
In the case of, stop battery balanced process.
Temperature collect module 105 and battery module 101, balanced management module 102 for example can by contacting collecting temperature,
Temperature collect module 105 can be for example connected with balance module 103 by communication bus.
Embodiment shown in Fig. 6 provides a kind of is used for battery balanced device with overheat protector function.This hair
Additionally provided in bright other embodiment and be used for battery balanced dress with defencive functions such as overvoltage, excessively stream, short circuit, deficient temperature
Put, those skilled in the art should understand that its operation principle and the operation principle of overheat protector are similar, here is omitted.
In another embodiment of the present invention, balanced management module 102 can be also used for calculating in battery module 101
The average voltage of cell, balanced management module 102 control balance module 103 to hold battery module 101 according to magnitude of voltage
The battery balanced process of row can also include：
The first number and magnitude of voltage that magnitude of voltage is calculated higher than the cell of average voltage are less than average voltage
Cell the second number；
By the first number compared with the second number；
In the case where the first number is more than the second number, start TunePower balancing procedure；
In the case where the first number is less than or equal to the second number, the battery balanced process of star t-up discharge formula.
In a preferred embodiment of the invention, balance module can for example include multiwinding transformer, Multiple coil transformation
Device can include the main coil being connected with battery module and the multiple secondary coils being connected respectively with each cell, main coil
Equalizer switch is provided with the balanced circuit formed with battery module, a secondary coil in multiple secondary coils and connected
Equalizer switch is provided with the balanced branch road that cell is formed.
TunePower balancing procedure can specifically include：
The equalizer switch on balanced circuit that closure main coil is formed with battery module, by the part energy of battery module
It is transferred in the multiwinding transformer of balance module；
The equalizer switch on the balanced circuit that main coil is formed with battery module is disconnected, is closed on corresponding balanced branch road
Equalizer switch, the part energy for transferring to multiwinding transformer are transferred to monomer electricity of the magnitude of voltage less than average voltage
Pond；
The battery balanced process of discharge type can specifically include：
Equalizer switch on the corresponding balanced branch road of closure, by a part of the magnitude of voltage higher than the cell of average voltage
Energy transfer is to multiwinding transformer；
The equalizer switch on balanced branch road is disconnected, the equilibrium on balanced circuit that closure main coil is formed with battery module is opened
Close, the part energy for transferring to multiwinding transformer is transferred to battery module.
Fig. 7 and Fig. 8 respectively illustrates the view of rechargeable balancing procedure and the state of discharge type balancing procedure is shown
It is intended to.As shown in fig. 7, in one embodiment of the present invention, battery module 101 can include cell 213, cell
214th, cell 215, cell 216, balance module 103 include multiwinding transformer, and multiwinding transformer can include
The main coil 201 that is connected with battery module 101 and respectively positioned at cell 213, cell 214, cell 215 and
Equalizer switch 221, equalizer switch 222, equalizer switch 223 and the equalizer switch on balanced branch road where cell 216
224, equalizer switch 231 is provided with the balanced circuit that battery module 101 is formed with main coil 201.
Voltage acquisition module 104 gathers the magnitude of voltage of each cell of battery module 101, temperature collect module 105
Gather the temperature value of battery module 101 and the temperature value of balance module 103；In highest monomer battery voltage and minimum cell
Voltage difference between voltage is more than first voltage difference threshold value and the temperature value of battery module 101 and the temperature of balance module 103
In the case that value is respectively smaller than respective first temperature threshold, balanced management module 102 calculates the cell in battery module
Average voltage and magnitude of voltage be less than average voltage higher than the first number of cell of average voltage, magnitude of voltage
Cell the second number.In the view of rechargeable balancing procedure shown in Fig. 7, cell 213, monomer electricity
The magnitude of voltage of pond 215 and cell 216 is higher than average voltage, and the magnitude of voltage of cell 214 is less than average voltage, i.e.,
Magnitude of voltage is more than magnitude of voltage less than the cell of average voltage higher than the first number of the cell of average voltage
Second number, battery management module 102 control balance module 103 to start rechargeable balancing procedure.
Rechargeable balancing procedure can specifically include：On the balanced circuit that closure battery module 101 is formed with main coil 201
Equalizer switch 231 is provided with, battery module 101 charges to multiwinding transformer, and energy storage is in multiwinding transformer；
After battery module 101 is to multiwinding transformer charging complete, disconnects equalizer switch 231 and close corresponding with cell 214
Equalizer switch 222, the energy transfer in multiwinding transformer is stored in into cell 214, can be from battery mould so as to realize
Transfer of the block to cell.
After the completion of charge balancing process, magnitude of voltage and cell 213, cell 215, the monomer of cell 214
The voltage difference between minimum monomer battery voltage in battery 216 is less than second voltage difference threshold value, but cell 214 and its
Voltage difference (such as cell 213 and cell 215 between the voltage difference and other monomers battery of his cell
Voltage difference) be possible to be more than or equal to second voltage difference threshold value, and the average voltage of the cell of battery module 101
Change, magnitude of voltage is less than the list of average voltage higher than the first number and magnitude of voltage of the cell of average voltage
Second number of body battery also changes therewith, therefore battery management module 102 can recalculate average voltage level, the first number
Mesh and the second number, and control balance module to start rechargeable balancing procedure or discharge type balancing procedure, until all batteries
Voltage difference between monomer terminates whole balancing procedure less than second voltage difference threshold value.
As shown in figure 8, in another embodiment of the present invention, battery module 101 can include cell 313, list
Body battery 314, cell 315, cell 316, balance module 103 include multiwinding transformer, and multiwinding transformer can
With including the main coil 301 being connected with battery module 101 and respectively positioned at cell 313, cell 314, monomer electricity
Equalizer switch 321, equalizer switch 322, equalizer switch 323 and the equilibrium on balanced branch road where pond 315 and cell 316
324 are switched, equalizer switch 331 is provided with the balanced circuit that battery module 101 is formed with main coil 301.
Voltage acquisition module 104 gathers the magnitude of voltage of each cell of battery module 101, temperature collect module 105
Gather the temperature value of battery module 101 and the temperature value of balance module 103；In highest monomer battery voltage and minimum cell
Voltage difference between voltage is more than first voltage difference threshold value and the temperature value of battery module 101 and the temperature of balance module 103
In the case that value is respectively smaller than respective first temperature threshold, balanced management module 102 calculates the cell in battery module
Average voltage and magnitude of voltage be less than average voltage higher than the first number of cell of average voltage, magnitude of voltage
Cell the second number.In the view of discharge type balancing procedure shown in Fig. 8, cell 313, monomer electricity
The magnitude of voltage of pond 314 and cell 316 is less than average voltage, and the magnitude of voltage of cell 315 is higher than average voltage, i.e.,
Magnitude of voltage is less than magnitude of voltage less than the cell of average voltage higher than the first number of the cell of average voltage
Second number, battery management module 102 control the star t-up discharge formula balancing procedure of balance module 103.
Discharge type balancing procedure can specifically include：Closure equalizer switch 323 corresponding with cell 315, monomer electricity
Pond 315 is charged to multiwinding transformer, and energy storage is in multiwinding transformer；Cell 315 is to Multiple coil transformation
After device charging complete, disconnect equalizer switch 323 and closing and set on the balanced circuit that battery module 101 is formed with main coil 301
There is equalizer switch 331, the energy for being stored in multiwinding transformer weight is transferred in battery module 101 by main coil 301, so as to
Realize transfer of the energy from cell to battery module 101.
After the completion of equalization discharge process, magnitude of voltage and cell 313, cell 314, the monomer of cell 315
The voltage difference between highest monomer battery voltage in battery 316 is less than second voltage difference threshold value, but cell 315 and its
Voltage difference (such as cell 313 and cell 314 between the voltage difference and other monomers battery of his cell
Voltage difference) be possible to be more than or equal to second voltage difference threshold value, and the average voltage of the cell of battery module 101
Change, magnitude of voltage is less than the list of average voltage higher than the first number and magnitude of voltage of the cell of average voltage
Second number of body battery also changes therewith, therefore battery management module 102 can recalculate average voltage level, the first number
Mesh and the second number, and control balance module to start rechargeable balancing procedure or discharge type balancing procedure, until all batteries
Voltage difference between monomer terminates whole balancing procedure less than second voltage difference threshold value.
By the method and device in above-mentioned embodiment, pass through multiwinding transformer between battery module and cell
Energy transfer is carried out, and this method is only less than average voltage level to cell or magnitude of voltage of the magnitude of voltage higher than average voltage level
Cell to carry out discharge type battery balanced or TunePower is balanced, realize rapidly, low-loss it is battery balanced.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, still, the present invention is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the present invention, a variety of letters can be carried out to technical scheme
Monotropic type, these simple variants belong to protection scope of the present invention.It is further to note that in above-mentioned embodiment
Described in each particular technique feature, in the case of reconcilable, can by any suitable means be combined, be
Unnecessary repetition is avoided, the present invention no longer separately illustrates to various combinations of possible ways.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (9)
1. a kind of be used for battery balanced method, it is characterised in that methods described includes：
Gather the magnitude of voltage of each cell of battery module；
Calculate the voltage difference between highest monomer battery voltage and minimum monomer battery voltage；
Judge whether the voltage difference is more than first voltage difference threshold value；
In the case where judging that the voltage difference is more than the first voltage difference threshold value, permit starting battery balanced process；
Start battery balanced process；
Judge whether the voltage difference is less than the second voltage difference threshold value；
In the case where judging that the voltage difference is less than the second voltage difference threshold value, terminate the balancing procedure.
2. according to the method for claim 1, it is characterised in that methods described also includes：
Gather the temperature value of the battery module and the temperature value of balance module；
Judge whether the temperature value of the battery module and the temperature value of balance module are respectively smaller than respective first temperature threshold；
Judging that the temperature value of the battery module and the temperature value of balance module be respectively smaller than respective first temperature threshold
In the case of, permit starting battery balanced process.
3. according to the method for claim 2, it is characterised in that methods described also includes：
It is described it is battery balanced during, judge the battery module temperature value and the balance module temperature value it is whether big
In respective second temperature threshold value；
It is more than respective second temperature threshold value in the temperature value for judging the temperature value of the battery module or the balance module
In the case of, stop the battery balanced process.
4. according to the method for claim 1, it is characterised in that methods described also includes：
Calculate the average voltage of the cell in the battery module；
The first number and magnitude of voltage that magnitude of voltage is calculated higher than the cell of the average voltage are put down less than the voltage
Second number of the cell of average；
By first number compared with second number；
In the case where first number is more than second number, start TunePower balancing procedure；
In the case where first number is less than or equal to second number, the battery balanced process of star t-up discharge formula.
5. according to the method for claim 4, it is characterised in that
The TunePower balancing procedure includes：
The part energy of the battery module is transferred to list of the magnitude of voltage less than the average voltage by balance module
Body battery；
The battery balanced process of discharge type includes：
Part energy of the magnitude of voltage higher than the cell of the average voltage is transferred to the electricity by balance module
Pond module.
6. a kind of be used for battery balanced device, it is characterised in that described device includes：
Voltage acquisition module, for gathering the magnitude of voltage of each cell in battery module；
Balance module；
Balanced management module, for receiving the magnitude of voltage of the voltage acquisition module collection, and institute is controlled according to the magnitude of voltage
State balance module and battery balanced process is performed to the battery module；
Wherein, controlling the balance module to perform battery balanced process to the battery module includes：
Calculate the voltage difference between highest monomer battery voltage and minimum monomer battery voltage；
Judge whether the voltage difference is more than first voltage difference threshold value；
In the case where judging that the voltage difference is more than the first voltage difference threshold value, permit starting battery balanced process；
Start battery balanced process；
Judge whether the voltage difference is less than the second voltage difference threshold value；
In the case where judging that the voltage difference is less than the second voltage difference threshold value, terminate the balancing procedure.
7. device according to claim 6, it is characterised in that described device also includes：
Temperature collect module, for gathering the temperature value of the battery module and the balance module；
The balanced management module is used for the temperature value for receiving the temperature collect module collection, and is controlled according to the temperature value
The balance module performs battery balanced process to the battery module；
Wherein, controlling the balance module to perform battery balanced process to the battery module includes：
Judge whether the temperature value of the battery module and the temperature value of balance module are respectively smaller than respective first temperature threshold；
Judging that the temperature value of the battery module and the temperature value of balance module be respectively smaller than respective first temperature threshold
In the case of, permit starting battery balanced process；
It is described it is battery balanced during, judge the battery module temperature value and the balance module temperature value it is whether big
In respective second temperature threshold value；
It is more than respective second temperature threshold value in the temperature value for judging the temperature value of the battery module or the balance module
In the case of, stop the battery balanced process.
8. device according to claim 6, it is characterised in that the balanced management module is used to calculate the battery module
In the cell average voltage, the battery module include magnitude of voltage higher than the average voltage monomer electricity
Pond and magnitude of voltage are less than the cell of the average voltage, and the balanced management module controls institute according to the magnitude of voltage
State balance module includes to the battery balanced process of battery module execution：
The first number and magnitude of voltage that magnitude of voltage is calculated higher than the cell of the average voltage are put down less than the voltage
Second number of the cell of average；
By first number compared with second number；
In the case where first number is more than second number, start TunePower balancing procedure；
In the case where first number is less than or equal to second number, the battery balanced process of star t-up discharge formula.
9. device according to claim 8, it is characterised in that the balance module includes multiwinding transformer, described more
Winding transformer includes the main coil that be connected with the battery module and is connected respectively with each cell multiple
Secondary coil, equalizer switch, the multiple secondary coil are provided with the balanced circuit that the main coil is formed with the battery module
In the balanced branch road that forms of a secondary coil and the connected cell on be provided with equalizer switch；
The TunePower balancing procedure includes：
The part energy of the battery module is transferred into magnitude of voltage by the multiwinding transformer of the balance module to be less than
The cell of the average voltage；
The battery balanced process of discharge type includes：
Part energy of the magnitude of voltage higher than the cell of the average voltage is shifted by the multiwinding transformer
To the battery module.
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