CN102820687A - Balance control method and device for power battery system - Google Patents
Balance control method and device for power battery system Download PDFInfo
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- CN102820687A CN102820687A CN2012102925493A CN201210292549A CN102820687A CN 102820687 A CN102820687 A CN 102820687A CN 2012102925493 A CN2012102925493 A CN 2012102925493A CN 201210292549 A CN201210292549 A CN 201210292549A CN 102820687 A CN102820687 A CN 102820687A
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Abstract
The invention provides a balance control method and device for a power battery system. The method comprises the following steps of obtaining a battery parameter of a power battery system, wherein the battery parameter comprises the voltage of each monomer battery; determining a monomer battery to be balanced according to the threshold voltage and the voltage of each monomer battery; and selecting at least one high voltage monomer battery to be balanced to perform energy transfer on the other monomer batteries to be balanced not including the selected high voltage monomer battery to be balanced. The embodiment provided by the invention avoids resource waste, improves the performance of the power battery system, and prolongs the service life of the battery.
Description
Technical field
The present invention relates to the battery technology field, relate to a kind of electrokinetic cell system balance control method and device in particular.
Background technology
Along with becoming increasingly conspicuous of environmental protection and power saving, the development of new-energy automobile more and more receives people's attention.New-energy automobile mainly is meant various power vehicles or mixed type power vehicle etc., and as one of new-energy automobile development key technology, electrokinetic cell and management system thereof become the focus of artificial research.
Being applied in electrokinetic cell system on the new-energy automobile is connected in series by a plurality of cells usually and forms.The electrokinetic cell type mainly contains: lead acid accumulator, Ni-MH battery, nickel-cadmium cell and lithium battery.Lithium battery is compared with batteries such as cadmium nickel with traditional plumbic acid, has specific energy height, long service life, memory-less effect, characteristics such as pollution is little and operating voltage is high and self-discharge rate is low, in the application of new-energy automobile more and more widely.
Because battery temperature, internal resistance, consistency etc. are the principal elements that influences electrokinetic cell performance and life-span.Battery cell is because the otherness of manufacturing and environment for use; In the use of battery; The otherness of battery cell will progressively worsen, and through after the charge and discharge cycles repeatedly, can produce bigger voltage difference between the battery; Make the total available capacity of series battery diminish, influence the serviceability and the life-span of battery pack.Therefore the consistency and the fail safe of system in order to improve lithium battery prolongs useful life of battery, need carry out equilibrium to electrokinetic cell system and control.
Existing a kind of electrokinetic cell system balance control method; Be through detecting the voltage condition of cell in the dynamical system; And with preset magnitude of voltage relatively; After single battery voltage reaches preset value, then control this batteries one part of current is shunted away from the branch road parallelly connected with this battery, thereby it is consistent to guarantee that every batteries voltage all compares.But this mode is to consume portion of energy through the branch road parallelly connected with this battery, causes energy dissipation and has increased the heat radiation difficulty.
Summary of the invention
In view of this, the present invention provides a kind of electrokinetic cell system balance control method, in order to solve the balanced technical problem that causes energy dissipation of controlling in the prior art.
The present invention also provides a kind of electrokinetic cell system equalising control device, in order to guarantee the realization of said method in practical application.
For realizing above-mentioned purpose, the present invention provides following technical scheme:
A kind of electrokinetic cell system balance control method, said electrokinetic cell system is made up of a plurality of cells that are connected in series, and said method comprises:
Obtain the battery parameter of said electrokinetic cell system, said battery parameter comprises the voltage of each cell;
According to the voltage and the threshold voltage of said each cell, confirm to treat balanced cell;
According to voltage order from high to low, select at least one high-tension treat balanced cell to do not comprise selected said high-tension treat balanced cell other treat that balanced cell carries out energy and shifts.
Preferably, said according to each monomer battery voltage and threshold voltage, confirm to treat that balanced cell comprises:
According to each monomer battery voltage and threshold voltage, confirm to treat balanced first cell and second cell that said first monomer battery voltage is greater than said second monomer battery voltage;
Then said according to voltage order from high to low, select at least one high-tension treat balanced cell to do not comprise selected said high-tension treat balanced cell other treat that balanced cell carries out energy and shifts and be specially:
According to voltage order from high to low, select at least one high-tension first cell to carry out energy and shift to said second cell.
Preferably, said according to each monomer battery voltage and threshold voltage, confirm to treat that balanced first cell and second cell comprise:
The voltage of each cell and first threshold voltage and second threshold voltage are compared, and said first threshold voltage is greater than said second threshold voltage;
Confirm in the said cell that voltage is treated the first balanced cell and the voltage second balanced cell of treating less than said second threshold voltage greater than said first threshold voltage;
Perhaps, calculate the average voltage of said cell, and the pressure reduction of each monomer battery voltage and said average voltage;
Confirm in the said cell, with the pressure reduction of said average voltage greater than the 3rd threshold voltage treat the first balanced cell and less than the second balanced cell of treating of said the 3rd threshold voltage.
Preferably, said according to voltage order from high to low, select at least one high-tension first cell to carry out the energy transfer and comprise to said second cell:
According to rule one to one, confirm the one-to-one relationship of said first cell and second cell, said rule one to one is: the minimum cell of magnitude of voltage in cell correspondence second cell that magnitude of voltage is the highest in first cell; Never comprise and confirm in first cell of corresponding cell that the highest cell correspondence of magnitude of voltage does not comprise the minimum cell of magnitude of voltage in second cell of corresponding cell; All to unique second cell should be arranged, perhaps each second cell is all to there being unique first cell until each first cell;
According to said corresponding relation, carry out energy by first cell to its second corresponding cell and shift;
When having not corresponding residue first cell, remain first cell by each and carry out the energy transfer to other cells that do not comprise himself;
When having not corresponding residue second cell, remain second cell to each, by not comprising that these other cells that remain second cell remain second cell to this and carry out the energy transfer.
Preferably, said according to each monomer battery voltage and threshold voltage, confirm to treat that balanced cell comprises:
Confirm the operating state of said electrokinetic cell system, and under said operating state corresponding threshold voltage;
According to corresponding threshold voltage under the said operating state, confirm to treat balanced cell.
Preferably, obtain the voltage of said each cell after, said method also comprises:
According to said battery parameter, judge whether said electrokinetic cell system satisfies the balancing energy condition;
If, carry out saidly again according to each monomer battery voltage and threshold voltage, confirm to treat the step of balanced cell.
A kind of electrokinetic cell system equalising control device, said electrokinetic cell system is made up of a plurality of cells that are connected in series, and said device comprises:
Acquisition module is used to obtain the battery parameter of said electrokinetic cell system, and said battery parameter comprises the voltage of each cell;
Determination module is used for voltage and threshold voltage according to said each cell, confirms to treat balanced cell;
Balance module is used for according to voltage order from high to low, select at least one high-tension treat balanced cell to do not comprise selected said high-tension treat balanced cell other treat that balanced cell carries out energy and shifts.
Preferably, said determination module specifically is used for according to each monomer battery voltage and threshold voltage, confirms to treat balanced first cell and second cell, and said first monomer battery voltage is greater than said second monomer battery voltage;
Then said balance module specifically is used for according to voltage order from high to low, selects at least one high-tension first cell to carry out energy to said second cell and shifts.
Preferably, said determination module specifically is used for the voltage of each cell and first threshold voltage and second threshold voltage are compared, and said first threshold voltage is greater than said second threshold voltage; Confirm in the said cell that voltage is treated the first balanced cell and the voltage second balanced cell of treating less than said second threshold voltage greater than said first threshold voltage; Perhaps, be used to calculate the average voltage of said cell, and the pressure reduction of each monomer battery voltage and said average voltage; Confirm in the said cell, with the pressure reduction of said average voltage greater than the 3rd threshold voltage treat the first balanced cell and less than the second balanced cell of treating of said the 3rd threshold voltage.
Preferably, said balance module comprises:
The corresponding relation determination module; Be used for according to one to one regular; Confirm the one-to-one relationship of said first cell and second cell, said rule one to one is: the minimum cell of magnitude of voltage in corresponding second cell of the cell that magnitude of voltage is the highest in first cell; Never comprise and confirm in first cell of corresponding cell that the highest cell correspondence of magnitude of voltage does not comprise the minimum cell of magnitude of voltage in second cell of corresponding cell; All to unique second cell should be arranged, perhaps each second cell is all to there being unique first cell until each first cell;
First judge module is used to judge whether to exist not corresponding residue first cell;
Second judge module is used to judge whether to exist not corresponding residue second cell;
Balanced submodule; Be used for according to said corresponding relation; Carry out energy by first cell to its second corresponding cell and shift, and when the said first judge module result when being, remain first cell by each and carry out the energy transfer to other cells that do not comprise himself; When the said second judge module result when being, remain second cell to each, by not comprising that these other cells that remain second cell remain second cell to this and carry out energy and shift.
Preferably, said determination module comprises:
Threshold determination module is used for confirming the operating state of said electrokinetic cell system, and under said operating state corresponding threshold voltage;
The battery determination module is used for confirming to treat balanced cell according to corresponding threshold voltage under the said operating state.
Preferably, said device also comprises:
Judge module is used for judging whether said electrokinetic cell system satisfies the balancing energy condition according to said battery parameter, when the result when being, trigger said determination module
Can know via above-mentioned technical scheme; Compared with prior art, the invention provides a kind of electrokinetic cell system balance control method and device, through the battery parameter of electrokinetic cell system; And according to the voltage and the threshold voltage of each included cell of battery parameter; Determine the battery that need carry out balanced control, promptly treat balanced cell, according to voltage order from high to low; Select at least one high-tension treat balanced cell to do not comprise selected go out high-tension treat balanced cell other treat that balanced cell carries out energy and shifts; Make when having avoided the waste of resource, improved the performance of electrokinetic cell system, prolonged the useful life of battery.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is embodiments of the invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to the accompanying drawing that provides.
Fig. 1 is the flow chart of a kind of electrokinetic cell system balance control method of the present invention embodiment 1;
Fig. 2 is the flow chart of a kind of electrokinetic cell system balance control method of the present invention embodiment 2;
Fig. 3 is the flow chart of a kind of electrokinetic cell system balance control method of the present invention embodiment 3;
Fig. 4 is the structural representation of a kind of electrokinetic cell system equalising control device of the present invention embodiment 1;
Fig. 5 is the structural representation of a kind of electrokinetic cell system equalising control device of the present invention embodiment 2.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
The embodiment of the invention discloses a kind of electrokinetic cell system balance control method and device; Through the battery parameter of electrokinetic cell system, and, determine the battery that need carry out balanced control according to the voltage and the threshold voltage of each included cell of battery parameter; Promptly treat balanced cell; According to voltage order from high to low, select at least one high-tension treat balanced cell to do not comprise selected go out high-tension treat balanced cell other treat that balanced cell carries out energy and shifts, make when having avoided the waste of resource; Improve the performance of electrokinetic cell system, prolonged the useful life of battery.
Referring to Fig. 1, show the flow chart of a kind of electrokinetic cell system balance control method of the present invention embodiment 1, said electrokinetic cell system is made up of a plurality of cells that are connected in series, and said method can comprise:
Step 101: obtain the battery parameter of said electrokinetic cell system, said battery parameter comprises the voltage of each cell.
Step 102:, confirm to treat balanced cell according to each monomer battery voltage and threshold voltage.
In power vehicle or mixed type power vehicle; Electrokinetic cell system is connected in series by a plurality of cells usually and forms; Therefore individuation difference occurs between the cell, will influence the useful life of whole power battery system, therefore need carry out battery balanced control.The said battery parameter that obtains each cell can obtain in real time or every separated some cycles promptly obtains, and compares according to the voltage and the preset threshold value voltage of each cell, determines and treats balanced cell.
Wherein, Said battery parameter can also comprise the total current of battery temperature or electrokinetic cell system etc.; The voltage that obtains each cell can adopt multiple mode, and for example system can be parallelly connected with each cell, thereby can detect the voltage at each cell two ends.
Wherein, Said threshold voltage can be the minimum voltage that can allow or the ceiling voltage of each cell; A kind ofly maybe mode do, said threshold voltage comprises the first threshold voltage and second threshold voltage, and first threshold voltage is greater than second threshold voltage; The ceiling voltage of first threshold voltage for allowing cell to reach, the minimum voltage of second threshold voltage for allowing cell to reach.
Therefore according to each monomer battery voltage and threshold voltage, confirm to treat that the first balanced cell and second cell can be specifically:
The voltage of each cell and first threshold voltage and second threshold voltage are compared; Thereby determine in the said cell, voltage is to treat that the first balanced cell and voltage are to treat the second balanced cell less than the cell of said second threshold voltage greater than the cell of said first threshold voltage.First cell is high-tension cell, for reaching balanced, requires the expenditure of energy, and second cell is the cell of low-voltage, for reaching balanced, need carry out energy supplement.
In addition, said threshold voltage can also be meant the maximum differential pressure between the cell, for distinguishing with the above-mentioned first threshold and second threshold value, is made as the 3rd threshold voltage.Therefore according to each monomer battery voltage and threshold voltage, confirm to treat that balanced first cell and second cell can also specifically comprise:
Calculate the average voltage of said cell; And the pressure reduction of each monomer battery voltage and said average voltage; Thereby determine in the said cell, with the pressure reduction of said average voltage greater than the 3rd threshold voltage treat the first balanced cell and less than the second balanced cell of treating of said the 3rd threshold voltage.Said first cell also is high-tension cell, for reaching balanced, requires the expenditure of energy, and said second cell is the cell of low-voltage, for reaching balanced, need carry out energy supplement.
When calculating the average voltage of said cell; In order to guarantee the accuracy of result of calculation; Reduce error; Can be specifically: at first from said cell, get rid of the highest cell and the minimum cell of voltage of voltage, will get rid of other cell calculating voltage mean values behind the minimum cell of the highest cell of voltage and voltage then, then with its average voltage as cell.
Need to prove; " first " " second " mentioned above just clearly is used for an entity or handles with another entity or operation making a distinction in order to describe, and not necessarily requires or hint and have the relation of any this reality or in proper order between these entities or the operation.In the present embodiment; First cell is meant the cell that voltage is high, and second cell is meant the cell that voltage is low, and just it confirms that mode is different; Confirm in the mode that in difference the concrete number of first cell that is obtained and physical parameter maybe be different.
Step 103: according to voltage order from high to low, select at least one high-tension treat balanced cell to do not comprise selected said high-tension treat balanced cell other treat that balanced cell carries out energy and shifts.
After determining the cell of treating equilibrium; Promptly can carry out equilibrium control; Select the high cell of at least one voltage that other the balanced cell of treating is carried out the energy transfer; Can be other the balanced cell of treating to be charged, thereby make and treat that differentiation reduces between the balanced cell with the higher balanced cell of treating of voltage, balance treat the pressure reduction between the balanced cell.Because system can promptly can obtain the voltage of each cell at a distance from some cycles in real time or whenever again, and then carries out follow-up operation, so step 101 ~ step 103 is that circulation is carried out.Thereby finally can realize the equilibrium between each cell is controlled.When carrying out the energy transfer, how much what energy shifted can confirm according to the average energy of treating balanced cell, certainly because step 101 ~ step 103 is to circulate to carry out; Also can adopt the mode of trial; When carrying out the energy transfer, also can obtain the voltage of each cell in real time, and compare with threshold voltage; And then can determine and whether need carry out the energy transfer, and which cell to carry out energy to and shift.
Wherein, treat that balanced cell can be divided into first cell and second cell, wherein, the voltage of each first cell is all greater than the voltage of second cell.Therefore when carrying out equilibrium control, specifically be to select one first cell to carry out energy at least and shift to said second cell.The number of selected first cell according to different situations and difference, can be introduced among the embodiment below in detail.
The division of said first cell and second cell can be confirmed according to one of described dual mode of step 102 at least.Promptly can specifically be divided into three types battery: the 3rd cell that does not comprise first cell and second cell in first cell, second cell and the electrokinetic cell system to the cell in the electrokinetic cell system; The voltage of the 3rd cell is less than the voltage of first cell; And greater than second cell; It can need not to participate in balanced control operation, and its number possibly be 0 certainly.Shift through selecting first cell to carry out energy to second cell.Make energy be unlikely to waste, also realized equilibrium for the cell that voltage is lower, the difference of having avoided the cell of low-voltage to cause, thereby balance the difference between each cell.
Certainly the number of said first cell or second cell possibly be 0; When the first cell number is 0; Then according to select at least one high-tension treat balanced cell to do not comprise selected said high-tension treat balanced cell other treat that balanced cell carries out the principle that energy shifts, then can select at least one high-tensionly to treat that balanced cell carries out energy to second cell and shifts.Said second cell comprises when a plurality of; The process that this energy shifts then can adopt the form of all cell discharges, because all cells are for being connected in series if select charging modes; The energy of second cell is lower; Therefore therefore the electric current of the discharge of second cell promptly shows as the second cell charging of the higher a plurality of cells of voltage to low-voltage much smaller than the charging current that flows into, and realizes that energy shifts.
When the second cell number is 0; Then according to select at least one high-tension treat balanced cell to do not comprise selected said high-tension treat balanced cell other treat that balanced cell carries out the principle that energy shifts, then can select this first cell to carry out energy and shift to the residual monomer battery that does not comprise first cell.First cell comprises when a plurality of; The process that this energy shifts then can adopt the form of all cell discharges, because all cells are for being connected in series if select charging modes; The energy of first cell is higher; Therefore therefore the electric current of the discharge of first cell promptly shows as the first higher cell of voltage other cell chargings to low-voltage much larger than the charging current that flows into, and realizes that energy shifts.
Threshold voltage described in the present embodiment, with and the first threshold voltage in different implementations, specialized and second threshold voltage, or the 3rd threshold voltage, be to confirm according to the actual conditions of electrokinetic cell system.When cell greater than first threshold voltage, perhaps less than second threshold voltage, when perhaps cell and average voltage pressure reduction are not equal to said the 3rd threshold voltage, can produce bigger difference between cell or influence the serviceability of electrokinetic cell system.Its concrete numerical value can obtain according to experimental measurement.
In the present embodiment, after determining the cell of treating equilibrium, select a higher cell of voltage to treat that to other balanced cell carries out energy and shifts at least, promptly other are treated balanced cells charging.Make when having avoided the waste of resource, improved the performance of electrokinetic cell system, prolonged the useful life of battery, and also do not have further requirement for system radiating.
Referring to Fig. 2, show the flow chart of a kind of electrokinetic cell system balance control method of the present invention embodiment 2, said electrokinetic cell system is made up of a plurality of cells that are connected in series, and said method can comprise:
Step 201: the battery parameter that obtains said electrokinetic cell system.
Said battery parameter can comprise parameters such as the voltage, battery temperature of each cell.
Step 202: according to each monomer battery voltage and threshold voltage, confirm to treat balanced first cell and second cell that said first monomer battery voltage is greater than said second monomer battery voltage.
Wherein, the concrete implementation of step 202 can for:
The voltage of each cell and first threshold voltage and second threshold voltage are compared, and said first threshold voltage is greater than said second threshold voltage;
Confirm in the said cell that voltage is treated the first balanced cell and the voltage second balanced cell of treating less than said second threshold voltage greater than said first threshold voltage.
Perhaps, calculate the average voltage of said cell, and the pressure reduction of each monomer battery voltage and said average voltage;
Confirm in the said cell, with the pressure reduction of said average voltage greater than the 3rd threshold voltage treat the first balanced cell and less than the second balanced cell of treating of said the 3rd threshold voltage.
Step 203:, confirm the one-to-one relationship of said first cell and second cell according to rule one to one.
Said rule one to one is: the minimum cell of magnitude of voltage in corresponding second cell of the cell that magnitude of voltage is the highest in first cell; Never comprise and confirm in first cell of corresponding cell that the highest cell correspondence of magnitude of voltage does not comprise the minimum cell of magnitude of voltage in second cell of corresponding cell; All to unique second cell should be arranged, perhaps each second cell is all to there being unique first cell until each first cell.
Because the first balanced number of first cell possibly equate that with the second balanced number of said second cell also possibility is unequal.。Therefore when confirming said corresponding relation, have not corresponding residue first cell or not corresponding residue second cell.
According to said rule one to one, confirm that the process of corresponding relation illustrates as follows:
Suppose that first cell and second cell all have 3, do not comprise in the electrokinetic cell system that the 3rd cell of first cell and second cell has 2, according to voltage order from high to low; First cell comprises a1, a2, a3, and second cell comprises b1, b2, b3, and the 3rd cell comprises c1, c3; Regular according to one to one; Determined corresponding relation is: the corresponding b3 of a1, the corresponding b2 of a2, the corresponding b1 of a3.When first cell equated with the balanced number of second cell, the 3rd cell can not participated in equalization operation.
Suppose that said first cell has 3, is respectively according to voltage order from high to low: a1, a2, a3, second cell have 6, are respectively according to voltage order from high to low: b1, b2, b3, b4, b5, b6.The 3rd cell has 2, is respectively c1 and c2.Then according to the rule of correspondence one by one, determined corresponding relation is: the corresponding b6 of a1, the corresponding b5 of a2, the corresponding b4 of a3.Then also there is not corresponding residue second cell in second cell: b1, b2 and b3.
Suppose that said first cell has 6, is respectively according to voltage order from high to low: a1, a2, a3, a4, a5, a6.Second cell has 3, is respectively according to voltage order from high to low: b1, b2, b3.The 3rd cell has 2, is respectively c1 and c2.Then according to the rule of correspondence one by one, determined corresponding relation is: the corresponding b3 of a1, the corresponding b2 of a2, the corresponding b1 of a3.Then also there are not corresponding the residue first cell a4, a5 and a6 in first cell.
Step 204:, carry out energy by first cell to its second corresponding cell and shift according to said corresponding relation.
According to the determined corresponding relation of step 203, can carry out energy to its second corresponding cell by first cell and shift, like charging.
Be example with example in the step 203 still, when supposing that the first cell number equates with the second cell number, promptly carry out energy by a1 to its corresponding b3 and shift that a2 carries out energy to b2 to be shifted, a3 carries out energy to b1 to be shifted.
When supposing the first cell number less than the second cell number, promptly carry out energy by a1 to b6 and shift, a2 carries out energy to b5 to be shifted, and a3 carries out energy to b4 to be shifted.
When supposing the first cell number greater than the second cell number, promptly carry out energy by a1 to b3 and shift, a2 carries out energy to b2 to be shifted, and a3 carries out energy to b1 to be shifted.
Because the first cell number and the second monomer number are not simultaneously, also have not corresponding residue first cell or remain second cell, therefore said method also comprises:
Step 205: judge whether to exist not corresponding residue first cell, if get into step 206, if do not get into step 207.
Judging whether to exist not corresponding residue first cell also can be through judging whether the first cell number is confirmed greater than the second cell number; If the first cell number, then shows residue first cell that existence is not corresponding greater than the second cell number.
Step 206: remain first cell by each and carry out the energy transfer to other cells that do not comprise himself.
Be example with the first cell number in the step 203 greater than the instance of the second monomer number still, corresponding residue first cell does not have: a4, a5 and a6.Then according to the said operation of step 206; Then a4 is promptly to a1, a2, a3, a5, a6; B1, b2, b3, c1 and c2 carry out energy to be shifted, and a5 is promptly to a1, a2, a3, a4, a6, and b1, b2, b3, c1 and c2 carry out energy to be shifted; A6 is promptly to a1, a2, a3, a4, a5, and b1, b2, b3, c1 and c2 carry out energy to be shifted.When adopting charging modes to carry out the energy transfer; In practical application, each cell all discharges, thereby the cell that other are connected in series is charged; Just work as the energy of the energy of a residual monomer battery greater than other cells; Therefore discharging current promptly shows as this remaining first cell and charges to other cells that do not comprise himself respectively greater than charging current, realizes that finally energy shifts.
The first cell number is during greater than the second cell number, and a kind of special circumstances are that the second monomer number is 0, because according to the rule of correspondence, not second cell corresponding with first cell one by one.Therefore first cell according to the described operation of step 206, promptly is to select each first cell promptly all as not corresponding residue first cell, carries out energy to other cells that do not comprise himself and shifts.
Step 207: judge whether to exist not corresponding residue second cell, if get into step 208, if not, process ends then.
Judging whether to exist not corresponding residue second cell can be to confirm through judging whether the first cell number is laughed in the second cell number; If the first cell number, then shows residue second cell that existence is not corresponding less than the second cell number.
Step 208: remain second cell to each, by not comprising that these other cells that remain second cell remain second cell to this and carry out the energy transfer.
Still be embodied as example to lift in the step 203, the first cell number is during less than the second cell number, and corresponding residue second cell does not comprise: b1, b2 and b3.Then a1, a2, a3, b1, b2, b4, b5, b6, c1 and c2 carry out the energy transfer to b3 simultaneously; A1, a2, a3, b1, b3, b4, b5, b6, c1 and c2 carry out energy to b2 simultaneously to be shifted; A1, a2, a3, b2, b3, b4, b5, b6, c1 and c2 carry out energy to b1 simultaneously to be shifted.
When adopting charging modes to carry out the energy transfer; Step 208 promptly is that each cell all discharges, thereby the cell that other are connected in series is charged in practical application; Just work as the energy of the energy of a residual monomer battery less than other cells; Therefore its discharging current is less than charging current, promptly shows as not comprise that this other cell that remains second cell remains second cell to this and charges, thereby realizes that energy shifts.
The first cell number is during less than the second cell number, and a kind of special circumstances are that the first monomer number is 0, because according to the rule of correspondence, not first cell corresponding with second cell one by one.Therefore second cell is promptly all as not corresponding residue second cell; According to the described operation of step 208; Promptly be to each second cell, carry out energy by other cells that do not comprise this second cell to this second cell and shift.
Need to prove that the operation of step 204 ~ step 208 also is defined in the embodiment order in the present embodiment.
Need to prove that also the described scheme of present embodiment promptly is meant under the situation that the first cell number and the second cell number are equating, carries out energy by each first cell to its one second corresponding cell and shifts; Under the situation of the first cell number less than the second cell number; Be at first to determine and the first cell number same number, second cell; Carrying out energy by each first cell to its second corresponding cell shifts; And for remaining second cell; To a residue second cell, remain second cell to each, by not comprising that these other cells that remain second cell remain second cell to this and carry out the energy transfer; Under the situation of the first cell number greater than the second cell number; Be at first to determine and the first individual cell of the second cell number same number; Each second cell carries out the energy transfer by its one first corresponding cell to it then; For remaining first cell, then remain first cell and carry out the energy transfer to other cells that do not comprise himself by each.
It is a kind of implementation that first cell that step described in the present embodiment realizes carries out the energy transfer to second cell, and the present invention is only for scheduling this.In the step 206, remaining first cell by each and carry out the energy transfer to other cells that do not comprise himself, also can be to remain first cell by each to carry out the energy transfer to other cells that do not comprise the first all cells.In the step 208, also can be to remain second cell, remain second cell by other cells that do not comprise all second cells to this and carry out the energy transfer to each.
In the present embodiment, be by treating the first balanced cell to treating that the second balanced cell carries out energy and shifts, and carry out correspondence, make energy distribution even, shift to realize energy more effectively and rapidly according to rule one to one.Thereby avoided the waste of energy, improved the performance of electrokinetic cell system, prolonged the useful life of battery
Referring to Fig. 3, show the flow chart of a kind of electrokinetic cell system balance control method of the present invention embodiment 3, said electrokinetic cell system is made up of a plurality of cells that are connected in series, and said method can comprise:
Step 301: the battery parameter that obtains said electrokinetic cell system.
Said battery parameter can comprise the voltage and the battery temperature of each cell, can also comprise other parameter value certainly.
Said electrokinetic cell system is specifically to be applied in the automobile, for automobile provides energy or assists energy is provided, so electrokinetic cell system roughly can be divided into three kinds of operating states:
The power source charges state, promptly the charged state of electrokinetic cell system external power supply when it is arranged in automobile, also is the charged state of car load external power supply.Then under this state, the battery parameter that is obtained can comprise: monomer battery voltage, battery temperature and charging current.
The energy output state: when promptly electrokinetic cell system was applied in the automobile, automobile was in running status when transport condition, and output current is the operating state that automobile provides energy.Then under this state, the battery parameter that is obtained can comprise: the voltage of cell, battery temperature and total current.Because under motoring condition, can produce bigger electric current is battery charge, therefore said total current can be meant the poor of output current and charging current.
Energy suspends output state: when promptly electrokinetic cell system is applied in the automobile, need not electrokinetic cell system energy is provided, the operating state under stopping like automobile.Then under this state, the battery parameter that is obtained can comprise: the voltage of cell and battery temperature.
Step 302: according to said battery parameter, judge whether said electrokinetic cell system satisfies the balancing energy condition, if then execution in step 303, if not, process ends then.
Wherein, judge whether said electrokinetic cell system satisfies the balancing energy condition and can be specially:
Judge whether whether ceiling voltage preset fault value less than second greater than the first preset fault value or minimum voltage in the said cell; Or whether the pressure reduction maximum of the voltage of each cell and cell average voltage is greater than the 3rd preset fault value; Or whether said battery temperature is greater than the temperature fault value; If wherein at least one is for being to confirm that then electrokinetic cell system does not satisfy the balancing energy condition.When battery overtension occurs or cross between low or cell pressure reduction excessive; When battery temperature is too high; The performance that then shows battery seriously descends; Then can not carry out equalization operation, to avoid the wasting of resources, the said first preset fault value, the second preset fault value and this temperature fault value are promptly confirmed according to actual conditions.
Wherein, under power source charges state and energy output state, except above-mentioned Rule of judgment, also need judge to the different operating state because electrokinetic cell system can work in the different working state.
As: at the power source charges state, in the time of also need judging said charging current whether greater than the predetermined current value, if not, confirm that then electrokinetic cell system does not satisfy the balancing energy condition.At battery charging process, during near fully charged state, charging current can diminish, and balancing energy is just can effect under the constant current charge state remarkable.Therefore if charging current is less than or equal to the predetermined current value, can think that then this moment, charging current became low current charge, not carry out the balancing energy operation.
Therefore; Under this state; If less than the second preset fault value, and the pressure reduction maximum of the voltage of each cell and cell average voltage presets fault value greater than the 3rd to ceiling voltage greater than the first preset fault value and minimum voltage in the cell, and whether said battery temperature is greater than the temperature fault value; And said rechargeable battery can confirm then that greater than the predetermined current value electrokinetic cell system satisfies the balancing energy condition.
Under the energy output state, whether also need judge said total current greater than 0, because total current representative output current and the charging current under this state is poor; If total current, shows then that electrokinetic cell system is in the output current state greater than 0, can carry out balancing energy; If total current is less than 0; Show that then electrokinetic cell system is in automobile and is its charged state,, cause the change in voltage Shanghai Communications University between the cell because this moment, charging current was bigger; For avoiding equalization operation inaccurate, then do not carry out balancing energy.
Under this state; If ceiling voltage is preset fault value greater than the first preset fault value and minimum voltage less than second in the cell; And the pressure reduction maximum of the voltage of each cell and cell average voltage is greater than the 3rd preset fault value; And whether said battery temperature is greater than the temperature fault value, and said total current can confirm then that greater than 0 electrokinetic cell system satisfies the balancing energy condition.
Step 303:, confirm to treat balanced cell according to each monomer battery voltage and threshold voltage.
Specifically be according to each monomer battery voltage and threshold voltage, to confirm to treat balanced first cell and second cell that said first monomer battery voltage is greater than said second monomer battery voltage.
The differentiation of said first cell and second cell can adopt following manner to realize:
The voltage of each cell and first threshold voltage and second threshold voltage are compared, and said first threshold voltage is greater than said second threshold voltage;
Confirm in the said cell that voltage is treated the first balanced cell and the voltage second balanced cell of treating less than said second threshold voltage greater than said first threshold voltage;
Perhaps, calculate the average voltage of said cell, and the pressure reduction of each monomer battery voltage and said average voltage;
Confirm in the said cell, with the pressure reduction of said average voltage greater than the 3rd threshold voltage treat the first balanced cell and less than the second balanced cell of treating of said the 3rd threshold voltage.
Wherein, be in energy at electrokinetic cell system and suspend output state following time, suspend output state if electrokinetic cell system has just switched to said energy, because battery has the characteristic that voltage gos up when leaving standstill.The monomer battery voltage that can cause obtaining immediately is inaccurate.Therefore said step 303 can comprise:
Confirm that said electrokinetic cell system suspends the operating time of output state at said energy;
If the said operating time greater than Preset Time, then according to each monomer battery voltage and threshold voltage, confirms to treat balanced cell;
If the said operating time is less than or equal to said Preset Time; Then after the said operating time arrives said Preset Time; Again obtain the new voltage of each cell, and, confirm to treat balanced cell according to the new voltage and the threshold voltage of each cell.
Wherein said threshold voltage is in different working state following time, and its numerical value is different, therefore can the first-selected operating state of confirming said electrokinetic cell system, and under said operating state corresponding threshold voltage; And then, confirm: treat balanced cell according to corresponding threshold voltage under the said operating state
Step 304:, confirm the one-to-one relationship of said first cell and second cell according to rule one to one.
Said rule one to one is: the minimum cell of magnitude of voltage in corresponding second cell of the cell that magnitude of voltage is the highest in first cell; Never comprise and confirm in first cell of corresponding cell that the highest cell correspondence of magnitude of voltage does not comprise the minimum cell of magnitude of voltage in second cell of corresponding cell; All to unique second cell should be arranged, perhaps each second cell is all to there being unique first cell until each first cell.
Step 305:, carry out energy by first cell to its second corresponding cell and shift according to said corresponding relation.
Step 306: judge whether to exist not corresponding residue first cell, if get into step 307, if do not get into step 308.
Judging whether to exist not corresponding residue first cell also can be through judging whether the first cell number is confirmed greater than the second cell number; If the first cell number, then shows residue first cell that existence is not corresponding greater than the second cell number.
Step 307: remain first cell by each and carry out the energy transfer to other cells that do not comprise himself.
The first cell number is during greater than the second cell number, and a kind of special circumstances are that the second monomer number is 0, because according to the rule of correspondence, not second cell corresponding with first cell one by one.Therefore first cell according to the described operation of step 307, promptly is to select each first cell promptly all as not corresponding residue first cell, carries out energy to other cells that do not comprise himself and shifts.
Step 308: judge whether to exist not corresponding residue second cell, if get into step 309, if not, process ends then.
Judging whether to exist not corresponding residue second cell can be to confirm through judging whether the first cell number is laughed in the second cell number; If the first cell number is laughed in the second cell number, then show residue second cell that existence is not corresponding.
Step 309: remain second cell to each, by not comprising that these other cells that remain second cell remain second cell to this and carry out the energy transfer.
The first cell number is during less than the second cell number, and a kind of special circumstances are that the first monomer number is 0, because according to the rule of correspondence, not first cell corresponding with second cell one by one.Therefore second cell is promptly all as not corresponding residue second cell; According to the described operation of step 309; Promptly be to each second cell, carry out energy by other cells that do not comprise this second cell to this second cell and shift.
In the present embodiment; Battery parameter according to the electrokinetic cell system of gathering; Determine electrokinetic cell system and whether can carry out equilibrium, can carry out under the balanced situation, by treating that the first balanced cell is to treating that the second balanced cell carries out energy and shifts; Avoid useless equalization operation, saved resource.And carry out correspondence according to rule one to one, make energy distribution even, shift to realize energy more effectively and rapidly.Thereby avoided the waste of energy, improved the performance of electrokinetic cell system, prolonged the useful life of battery.
Referring to Fig. 4, show the structural representation of a kind of electrokinetic cell system equalising control device of the present invention embodiment 1, said electrokinetic cell system is made up of a plurality of cells that are connected in series, and said device can comprise:
Wherein, said determination module specifically is used for according to each monomer battery voltage and threshold voltage, confirms to treat balanced first cell and second cell, and said first monomer battery voltage is greater than said second monomer battery voltage.
A kind ofly maybe mode do, said determination module specifically be that the voltage of each cell and first threshold voltage and second threshold voltage are compared, and said first threshold voltage is greater than said second threshold voltage; Confirm in the said cell that voltage is treated the first balanced cell and the voltage second balanced cell of treating less than said second threshold voltage greater than said first threshold voltage.
Another kind of possibility mode be: said determination module specifically is the average voltage that calculates said cell, and the pressure reduction of each monomer battery voltage and said average voltage; Confirm in the said cell, with the pressure reduction of said average voltage greater than the 3rd threshold voltage treat the first balanced cell and less than the second balanced cell of treating of said the 3rd threshold voltage.
Wherein, When said determination module is determined first cell and second cell; Said balance module specifically is used for according to voltage order from high to low, select at least one high-tension treat balanced cell to do not comprise selected said high-tension treat balanced cell other treat that balanced cell carries out energy and shifts.In this case, said balance module 403 can specifically comprise:
Corresponding relation determination module 4031; Be used for according to one to one regular; Confirm the one-to-one relationship of said first cell and second cell, said rule one to one is: the minimum cell of magnitude of voltage in corresponding second cell of the cell that magnitude of voltage is the highest in first cell; Never comprise and confirm in first cell of corresponding cell that the highest cell correspondence of magnitude of voltage does not comprise the minimum cell of magnitude of voltage in second cell of corresponding cell; All to unique second cell should be arranged, perhaps each second cell is all to there being unique first cell until each first cell.
Balanced submodule 4034; Be used for according to said corresponding relation; Carrying out energy by first cell to its second corresponding cell shifts; And when said first judge module, 4032 results when being, remain first cell by each and carry out energy to other cells that do not comprise himself and shift; When said second judge module, 4033 results when being, remain second cell to each, by not comprising that these other cells that remain second cell remain second cell to this and carry out energy and shift.
In the present embodiment, after determining the cell of treating equilibrium, select a higher cell of voltage to treat that to other balanced cell carries out energy and shifts at least, promptly other are treated balanced cells charging.Thereby avoided the waste of energy, improved the performance of electrokinetic cell system, prolonged the useful life of battery.
In practical application; The described equalising control device of present embodiment can be integrated with electrokinetic cell system; Promptly can control the controller of electrokinetic cell system or the device that microprocessor is perhaps formed by different control circuits separately; Certain said equalising control device can also be the device that connects separately with electrokinetic cell system; For example this equalising control device can be integrated in the controlled processing unit of automobile, and it realizes the control to it through setting up with being connected of electrokinetic cell system.
Referring to Fig. 5, show the structural representation of a kind of electrokinetic cell system equalising control device of the present invention embodiment 2, said electrokinetic cell system is made up of a plurality of cells that are connected in series, and said device can comprise:
Because electrokinetic cell system has the different working state, therefore the content of said acquisition module in the battery parameter that the different operating state is obtained is also incomplete same.
Wherein, said judge module judges whether said electrokinetic cell system satisfies the balancing energy condition and can be specially:
Judge whether whether ceiling voltage preset fault value less than second greater than the first preset fault value or minimum voltage in the said cell; Or whether the pressure reduction maximum of the voltage of each cell and cell average voltage is greater than the 3rd preset fault value; Or whether said battery temperature is greater than the temperature fault value; If wherein at least one is for being to confirm that then electrokinetic cell system does not satisfy the balancing energy condition.When battery overtension occurs or cross between low or cell pressure reduction excessive; When battery temperature is too high; The performance that then shows battery seriously descends; Then can not carry out equalization operation, to avoid the wasting of resources, the said first preset fault value, the second preset fault value and this temperature fault value are promptly confirmed according to actual conditions.
Wherein, under power source charges state and energy output state, except above-mentioned Rule of judgment, also need judge to the different operating state because electrokinetic cell system can work in the different working state.
As: at the power source charges state, in the time of also need judging said charging current whether greater than the predetermined current value, if not, confirm that then electrokinetic cell system does not satisfy the balancing energy condition.At battery charging process, during near fully charged state, charging current can diminish, and balancing energy is just can effect under the constant current charge state remarkable.Therefore if charging current is less than or equal to the predetermined current value, can think that then this moment, charging current became low current charge, not carry out the balancing energy operation.
Therefore; Under this state; If less than the second preset fault value, and the pressure reduction maximum of the voltage of each cell and cell average voltage presets fault value greater than the 3rd to ceiling voltage greater than the first preset fault value and minimum voltage in the cell, and whether said battery temperature is greater than the temperature fault value; And said rechargeable battery can confirm then that greater than the predetermined current value electrokinetic cell system satisfies the balancing energy condition.
Under the energy output state, whether also need judge said total current greater than 0, because total current representative output current and the charging current under this state is poor; If total current, shows then that electrokinetic cell system is in the output current state greater than 0, can carry out balancing energy; If total current is less than 0; Show that then electrokinetic cell system is in automobile and is its charged state,, cause the change in voltage Shanghai Communications University between the cell because this moment, charging current was bigger; For avoiding equalization operation inaccurate, then do not carry out balancing energy.
Under this state; If ceiling voltage is preset fault value greater than the first preset fault value and minimum voltage less than second in the cell; And the pressure reduction maximum of the voltage of each cell and cell average voltage is greater than the 3rd preset fault value; And whether said battery temperature is greater than the temperature fault value, and said total current can confirm then that greater than 0 electrokinetic cell system satisfies the balancing energy condition.
Since under the different operating state, different to the battery request in the electrokinetic cell system, so threshold voltage value also can be different, therefore said determination module specifically can comprise:
Threshold determination module is used for confirming the operating state of said electrokinetic cell system, and under said operating state corresponding threshold voltage;
The battery determination module is used for confirming to treat balanced cell according to corresponding threshold voltage under the said operating state.
Treat that balanced cell can protect two different balanced cells of treating of treating balanced classification of first cell and second cell, confirm that the threshold voltage of first cell and second cell is also different.Said threshold voltage can comprise first threshold voltage, second threshold voltage or the 3rd threshold voltage according to different actual conditions.
Therefore said battery determination module can be specifically compares the voltage of each cell and first threshold voltage and second threshold voltage, and said first threshold voltage is greater than said second threshold voltage; Confirm in the said cell that voltage is treated the first balanced cell and the voltage second balanced cell of treating less than said second threshold voltage greater than said first threshold voltage; Perhaps, be used to calculate the average voltage of said cell, and the pressure reduction of each monomer battery voltage and said average voltage; Confirm in the said cell, with the pressure reduction of said average voltage greater than the 3rd threshold voltage treat the first balanced cell and less than the second balanced cell of treating of said the 3rd threshold voltage.
Balance module 504: be used for according to voltage order from high to low, select at least one high-tension treat balanced cell to do not comprise selected said high-tension treat balanced cell other treat that balanced cell carries out energy and shifts.
When treating that balanced cell comprises first cell and second cell, said balance module can specifically comprise when said:
Corresponding relation determination module 5041; Be used for according to one to one regular; Confirm the one-to-one relationship of said first cell and second cell, said rule one to one is: the minimum cell of magnitude of voltage in corresponding second cell of the cell that magnitude of voltage is the highest in first cell; Never comprise and confirm in first cell of corresponding cell that the highest cell correspondence of magnitude of voltage does not comprise the minimum cell of magnitude of voltage in second cell of corresponding cell; All to unique second cell should be arranged, perhaps each second cell is all to there being unique first cell until each first cell;
Second judge module 50403 is used to judge whether to exist not corresponding residue second cell;
Balanced submodule 5044; Be used for according to said corresponding relation; Carrying out energy by first cell to its second corresponding cell shifts; And when said first judge module, 5042 results when being, remain first cell by each and carry out energy to other cells that do not comprise himself and shift; When said second judge module, 5043 results when being, remain second cell to each, by not comprising that these other cells that remain second cell remain second cell to this and carry out energy and shift.
In the present embodiment; Battery parameter according to the electrokinetic cell system of gathering; Determine electrokinetic cell system and whether can carry out equilibrium, can carry out under the balanced situation, by treating that the first balanced cell is to treating that the second balanced cell carries out energy and shifts; Avoid useless equalization operation, saved resource.And carry out correspondence according to rule one to one, make energy distribution even, shift to realize energy more effectively and rapidly.Thereby avoided the waste of energy, improved the performance of electrokinetic cell system, prolonged the useful life of battery.
Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed all is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.For the disclosed device of embodiment, because it is corresponding with the embodiment disclosed method, so description is fairly simple, relevant part is partly explained referring to method and is got final product.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments among this paper.Therefore, the present invention will can not be restricted to these embodiment shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (12)
1. an electrokinetic cell system balance control method is characterized in that, said electrokinetic cell system is made up of a plurality of cells that are connected in series, and said method comprises:
Obtain the battery parameter of said electrokinetic cell system, said battery parameter comprises the voltage of each cell;
According to the voltage and the threshold voltage of said each cell, confirm to treat balanced cell;
According to voltage order from high to low, select at least one high-tension treat balanced cell to do not comprise selected said high-tension treat balanced cell other treat that balanced cell carries out energy and shifts.
2. method according to claim 1 is characterized in that, and is said according to each monomer battery voltage and threshold voltage, confirms to treat that balanced cell comprises:
According to each monomer battery voltage and threshold voltage, confirm to treat balanced first cell and second cell that said first monomer battery voltage is greater than said second monomer battery voltage;
Then said according to voltage order from high to low, select at least one high-tension treat balanced cell to do not comprise selected said high-tension treat balanced cell other treat that balanced cell carries out energy and shifts and be specially:
According to voltage order from high to low, select at least one high-tension first cell to carry out energy and shift to said second cell.
3. method according to claim 2 is characterized in that, and is said according to each monomer battery voltage and threshold voltage, confirms to treat that balanced first cell and second cell comprise:
The voltage of each cell and first threshold voltage and second threshold voltage are compared, and said first threshold voltage is greater than said second threshold voltage;
Confirm in the said cell that voltage is treated the first balanced cell and the voltage second balanced cell of treating less than said second threshold voltage greater than said first threshold voltage;
Perhaps, calculate the average voltage of said cell, and the pressure reduction of each monomer battery voltage and said average voltage;
Confirm in the said cell, with the pressure reduction of said average voltage greater than the 3rd threshold voltage treat the first balanced cell and less than the second balanced cell of treating of said the 3rd threshold voltage.
4. according to claim 2 or 3 described methods, it is characterized in that, said according to voltage order from high to low, select at least one high-tension first cell to carry out the energy transfer and comprise to said second cell:
According to rule one to one, confirm the one-to-one relationship of said first cell and second cell, said rule one to one is: the minimum cell of magnitude of voltage in cell correspondence second cell that magnitude of voltage is the highest in first cell; Never comprise and confirm in first cell of corresponding cell that the highest cell correspondence of magnitude of voltage does not comprise the minimum cell of magnitude of voltage in second cell of corresponding cell; All to unique second cell should be arranged, perhaps each second cell is all to there being unique first cell until each first cell;
According to said corresponding relation, carry out energy by first cell to its second corresponding cell and shift;
When having not corresponding residue first cell, remain first cell by each and carry out the energy transfer to other cells that do not comprise himself;
When having not corresponding residue second cell, remain second cell to each, by not comprising that these other cells that remain second cell remain second cell to this and carry out the energy transfer.
5. method according to claim 1 is characterized in that, and is said according to each monomer battery voltage and threshold voltage, confirms to treat that balanced cell comprises:
Confirm the operating state of said electrokinetic cell system, and under said operating state corresponding threshold voltage;
According to corresponding threshold voltage under the said operating state, confirm to treat balanced cell.
6. according to claim 1 ~ 3,5 each described methods, it is characterized in that, obtain the voltage of said each cell after, said method also comprises:
According to said battery parameter, judge whether said electrokinetic cell system satisfies the balancing energy condition;
If, carry out saidly again according to each monomer battery voltage and threshold voltage, confirm to treat the step of balanced cell.
7. an electrokinetic cell system equalising control device is characterized in that, said electrokinetic cell system is made up of a plurality of cells that are connected in series, and said device comprises:
Acquisition module is used to obtain the battery parameter of said electrokinetic cell system, and said battery parameter comprises the voltage of each cell;
Determination module is used for voltage and threshold voltage according to said each cell, confirms to treat balanced cell;
Balance module is used for according to voltage order from high to low, select at least one high-tension treat balanced cell to do not comprise selected said high-tension treat balanced cell other treat that balanced cell carries out energy and shifts.
8. device according to claim 7; It is characterized in that; Said determination module specifically is used for according to each monomer battery voltage and threshold voltage, confirms to treat balanced first cell and second cell, and said first monomer battery voltage is greater than said second monomer battery voltage;
Then said balance module specifically is used for according to voltage order from high to low, selects at least one high-tension first cell to carry out energy to said second cell and shifts.
9. device according to claim 8 is characterized in that, said determination module specifically is used for the voltage of each cell and first threshold voltage and second threshold voltage are compared, and said first threshold voltage is greater than said second threshold voltage; Confirm in the said cell that voltage is treated the first balanced cell and the voltage second balanced cell of treating less than said second threshold voltage greater than said first threshold voltage; Perhaps, be used to calculate the average voltage of said cell, and the pressure reduction of each monomer battery voltage and said average voltage; Confirm in the said cell, with the pressure reduction of said average voltage greater than the 3rd threshold voltage treat the first balanced cell and less than the second balanced cell of treating of said the 3rd threshold voltage.
10. according to Claim 8 or 9 described devices, it is characterized in that said balance module comprises:
The corresponding relation determination module; Be used for according to one to one regular; Confirm the one-to-one relationship of said first cell and second cell, said rule one to one is: the minimum cell of magnitude of voltage in corresponding second cell of the cell that magnitude of voltage is the highest in first cell; Never comprise and confirm in first cell of corresponding cell that the highest cell correspondence of magnitude of voltage does not comprise the minimum cell of magnitude of voltage in second cell of corresponding cell; All to unique second cell should be arranged, perhaps each second cell is all to there being unique first cell until each first cell;
First judge module is used to judge whether to exist not corresponding residue first cell;
Second judge module is used to judge whether to exist not corresponding residue second cell;
Balanced submodule; Be used for according to said corresponding relation; Carry out energy by first cell to its second corresponding cell and shift, and when the said first judge module result when being, remain first cell by each and carry out the energy transfer to other cells that do not comprise himself; When the said second judge module result when being, remain second cell to each, by not comprising that these other cells that remain second cell remain second cell to this and carry out energy and shift.
11. device according to claim 7 is characterized in that, said determination module comprises:
Threshold determination module is used for confirming the operating state of said electrokinetic cell system, and under said operating state corresponding threshold voltage;
The battery determination module is used for confirming to treat balanced cell according to corresponding threshold voltage under the said operating state.
12. according to claim 7 ~ 9,11 each described devices, it is characterized in that, also comprise:
Judge module is used for judging whether said electrokinetic cell system satisfies the balancing energy condition according to said battery parameter, when the result when being, trigger said determination module.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105676136A (en) * | 2016-01-14 | 2016-06-15 | 北京新能源汽车股份有限公司 | Fault detection method and device for power battery connecting piece and management system |
| CN108710085A (en) * | 2018-06-06 | 2018-10-26 | 安徽江淮汽车集团股份有限公司 | A kind of monomer Selection method and system to be equalized of power battery |
| CN115799680A (en) * | 2023-02-13 | 2023-03-14 | 广东采日能源科技有限公司 | Passive equalization method, device and system for internal module of battery cluster |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040222768A1 (en) * | 2003-05-09 | 2004-11-11 | Moore Stephen W. | System and method for battery charge control based on charge capacity headroom |
| CN102111005A (en) * | 2011-03-08 | 2011-06-29 | 上海大学 | Equalization management system and method for nondestructive lithium battery |
| CN102545309A (en) * | 2011-11-10 | 2012-07-04 | 许春香 | Whole-course equalization method of chargeable battery system |
| CN102590755A (en) * | 2012-02-13 | 2012-07-18 | 北京海博思创科技有限公司 | Method and device for acquiring lithium ion battery capacity |
-
2012
- 2012-08-16 CN CN201210292549.3A patent/CN102820687B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040222768A1 (en) * | 2003-05-09 | 2004-11-11 | Moore Stephen W. | System and method for battery charge control based on charge capacity headroom |
| CN102111005A (en) * | 2011-03-08 | 2011-06-29 | 上海大学 | Equalization management system and method for nondestructive lithium battery |
| CN102545309A (en) * | 2011-11-10 | 2012-07-04 | 许春香 | Whole-course equalization method of chargeable battery system |
| CN102590755A (en) * | 2012-02-13 | 2012-07-18 | 北京海博思创科技有限公司 | Method and device for acquiring lithium ion battery capacity |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105676136A (en) * | 2016-01-14 | 2016-06-15 | 北京新能源汽车股份有限公司 | Fault detection method and device for power battery connecting piece and management system |
| CN108710085A (en) * | 2018-06-06 | 2018-10-26 | 安徽江淮汽车集团股份有限公司 | A kind of monomer Selection method and system to be equalized of power battery |
| CN115799680A (en) * | 2023-02-13 | 2023-03-14 | 广东采日能源科技有限公司 | Passive equalization method, device and system for internal module of battery cluster |
| CN115799680B (en) * | 2023-02-13 | 2023-05-23 | 广东采日能源科技有限公司 | Method, device and system for passive equalization of modules in battery cluster |
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Application publication date: 20121212 Assignee: CHONGQING CHANGAN NEW ENERGY AUTOMOBILE TECHNOLOGY Co.,Ltd. Assignor: Chongqing Changan Automobile Co.,Ltd.|CHONGQING CHANG'AN NEW ENERGY AUTOMOBILE Co.,Ltd. Contract record no.: 2018500000022 Denomination of invention: Balance control method and device for power battery system Granted publication date: 20160831 License type: Exclusive License Record date: 20181130 |
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Effective date of registration: 20190104 Address after: 401133 room 208, 2 house, 39 Yonghe Road, Yu Zui Town, Jiangbei District, Chongqing Patentee after: CHONGQING CHANGAN NEW ENERGY AUTOMOBILE TECHNOLOGY Co.,Ltd. Address before: 400023, No. 260, Jianxin East Road, Jiangbei District, Chongqing Co-patentee before: CHONGQING CHANG'AN NEW ENERGY AUTOMOBILE Co.,Ltd. Patentee before: Chongqing Changan Automobile Co.,Ltd. |
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Address after: No. 588 Shuguang Road, Longxing Town, Yubei District, Chongqing, 401135 Patentee after: Deep Blue Automotive Technology Co.,Ltd. Address before: 401133 room 208, 2 house, 39 Yonghe Road, Yu Zui Town, Jiangbei District, Chongqing Patentee before: CHONGQING CHANGAN NEW ENERGY AUTOMOBILE TECHNOLOGY Co.,Ltd. |