CN102790240A - Balancing control method for aging degree of storage batteries in vehicle power supply system - Google Patents
Balancing control method for aging degree of storage batteries in vehicle power supply system Download PDFInfo
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Abstract
The present invention relates to a vehicle electronic technology, and particularly to a method for balancing storage of electric energy between storage batteries in a vehicle power supply system adopting a plurality of storage batteries as an energy storage device. According to the energy balancing storage method of the present invention, the dual storage battery vehicle power supply system comprises a generator, a first storage battery, a second storage battery, and a control unit, wherein the first storage battery is coupled with the generator in parallel to form a power supply circuit, the second storage battery is coupled with a starter in parallel to form a start circuit, and the control unit is controllably coupled between the power supply circuit and the start circuit. The method comprises the following steps that: the control unit determines a difference between an aging degree of first storage battery and an aging degree of the second storage battery; the control unit determines whether the difference deviates from the preset range; and if the difference exceeds the preset range, the control unit enable the generator to charge the first storage battery and the second storage battery, such that the difference falls back within the preset range.
Description
Technical field
The present invention relates to automotive electronic technology, particularly a kind of in the automobile power supply system that utilizes the polylith storage battery as energy storage device the method for balanced storage battery degree of aging.
Background technology
Automobile power supply system mainly is made up of energy storage device (for example storage battery or ultracapacitor), energy conversion device (for example mechanical energy being converted into the generator of electric energy), starter and control unit.In automobile power supply system, control unit is the core of whole system, and it is responsible for confirming and implementing suitable electric energy management strategy according to operating modes such as power load, battery condition and generator states.Starter utilizes the energy of storage battery with automobile engine starting, and engine is turned round under required operating state.To drive generator for electricity generation during engine running, and the voltage request of pressing automotive electrical system is to the electricity consumption electric of automobile with to charge in batteries.For example; Under the control of control unit, if the electricity consumption electric current of automotive electrical system greater than the supply current of generator, then storage battery will discharge; With the electric current of covering the shortage; Otherwise, if the electricity consumption electric current of automotive electrical system less than the supply current of generator, then the part of difference between current is as the charging current of storage battery and flow into storage battery.
The electricity consumption of automobile loads on often has bigger difference on the electrical characteristic, for example starter work the time need provide big peace immediate current doubly, and throw light on, little electric current that equipment such as sound equipment need provide the long period.In order to satisfy the need for electricity of above-mentioned two types of loads simultaneously, industry generally adopts the storage battery of a big capacity and big pole plate area.But the shortcoming of this method is the shortening that causes the life of storage battery; This is because scenario possibly occur: after use after a while, storage battery is available as the accumulator that starts usefulness, but but can't supply power for a long time; Though perhaps can supply power for a long time; But but big electric current can't be provided, in the face of these situation, it will be inevitable changing storage battery.
Electricity consumption characteristics to different load; Automobile power supply system can adopt the double cell design; Be that storage battery comprises starting type accumulators and power supply type storage battery; The former and starter motor compose in parallel and start the loop, and the latter and electricity consumption device compose in parallel current supply circuit, and the electrical system controller can be controlled the keying that starts loop and current supply circuit respectively.In above-mentioned double cell design, along with launching of storage battery, their degree of aging will produce difference.If this difference is excessive, certainly will cause seriously do not match the useful life of two storage batterys, this will cause the increase of maintenance and repair cost.
Summary of the invention
An object of the present invention is to provide the balance control method of the storage battery degree of aging in a kind of automobile power supply system, it has the flexible and outstanding effect advantage of control mode.
Above-mentioned purpose of the present invention realizes through following technical proposal:
The balance control method of the storage battery degree of aging in a kind of automobile power supply system; The said pair of storage battery car electric power system comprise generator, and said generator parallel coupled with first storage battery that forms current supply circuit, with the starter parallel coupled with second storage battery that forms the startup loop and controllably be coupling in said current supply circuit and said startup loop between control unit; Wherein, comprise the following step:
Said control unit is confirmed the degree of aging of said first and second storage batterys;
Said control unit is confirmed the gap amount of the degree of aging of said first and second storage batterys;
If the gap amount of the degree of aging of said first and second storage batterys departs from predefined scope, then said control unit is through adopting corresponding power supply strategy so that the degree of aging of said first and second storage batterys reaches unanimity.
Preferably, in said method, said control unit is confirmed the degree of aging A of said first and second storage batterys according to following formula:
Wherein, C
s(t) completely fill capacity for said first and second storage batterys at moment t, C
NIt is the nominal capacity of first and second storage batterys.
Preferably, in said method, said first and second storage batterys completely fill capacity C at moment t
s(t) internal resistance through measuring said first and second storage batterys and confirm according to the relation of predetermined internal resistance-completely fill between the capacity.
Preferably, in said method, the internal resistance of said first and second storage batterys adopts alternating current method to record.
Preferably, in said method, the upper and lower bound of said predefined scope is asymmetric.
Preferably, in said method, said degree of aging is divided into a plurality of scopes, the corresponding centrifugal pump of each scope, and said control unit is confirmed the gap amount of the degree of aging of said first and second storage batterys according to following manner:
It is mapped as corresponding centrifugal pump according to the big young pathbreaker of the degree of aging of said first and second storage batterys; And
The centrifugal pump of the degree of aging of said first and second storage batterys is subtracted each other to confirm said gap amount.
Preferably, in said method, the quantity of said scope is five, gives centrifugal pump 1,2,3,4 and 5 respectively according to order from big to small.
Preferably, in said method, said control unit is according to following manner, through adopting corresponding power supply strategy so that the degree of aging of said first and second storage batterys reaches unanimity:
Preferably, in said method, said control unit is according to following manner, through adopting corresponding power supply strategy so that the degree of aging of said first and second storage batterys reaches unanimity:
If said gap amount exceeds the upper limit of said preset range, then said control unit remains on the preset level state-of-charge of said second storage battery; If said gap amount exceeds the lower limit of said preset range, then when the power consumption equipment of automobile needed storage battery power supply, said control unit was supplied power said first and second storage batterys simultaneously, and said first threshold is less than said second threshold value.
Preferably, in said method, said control unit remains on the preset level state-of-charge of said second storage battery according to following manner:
When the state-of-charge of said second storage battery during less than said preset level; If automobile is in the power load of the power supply capacity of transport condition and said generator greater than automobile; Then said control unit makes said generator reach said preset level to said second charge in batteries up to the state-of-charge of said second storage battery; Otherwise said control unit makes said first storage battery reach said preset level to said second charge in batteries up to the state-of-charge of said second storage battery.
Preferably, in said method, said control unit is according to following manner, through adopting corresponding power supply strategy so that the degree of aging of said first and second storage batterys reaches unanimity:
Preferably, in said method, said control unit is according to following manner, through adopting corresponding power supply strategy so that the degree of aging of said first and second storage batterys reaches unanimity:
When said gap amount exceeds going up in limited time of said preset range, if ambient temperature is lower than a preset value, then when automobile starting, said control unit makes said first and second storage batterys simultaneously to said starter power supply.
In one embodiment of the invention, degree of aging is divided into a plurality of scopes and gives corresponding centrifugal pump, this can simplify the calculating of gap amount and can adapt to different application requirements neatly through the value that changes centrifugal pump.In addition, in one embodiment, confirm that through measuring internal resistance the degree of aging of storage battery can reduce the complexity of measurement, is suitable for the degree of aging of dynamic regulation storage battery.
From the following detailed description that combines accompanying drawing, will make above and other objects of the present invention and advantage clear more fully.
Description of drawings
Fig. 1 is a kind of sketch map of exemplary two storage battery car electric power systems.
Fig. 2 is the structural representation of the shown in Figure 1 pair of control unit in the storage battery car electric power system.
Fig. 3 is the workflow diagram according to the degree of aging balance control method of one embodiment of the invention.
Fig. 4 is the sketch map of circuit that is used to measure accumulator internal resistance according to one embodiment of the invention.
Embodiment
Through being described with reference to the drawings, embodiment of the present invention sets forth the present invention below.But it will be appreciated that these embodiments only are exemplary, do not have restriction for spirit of the present invention and protection range.
In this manual; " coupling " speech is to be understood that the situation that directly transmits energy or signal between two unit for being included in; Perhaps transmit the situation of energy or signal indirectly, and alleged signal includes but not limited to the signal that the form with electricity, light and magnetic exists here through one or more Unit the 3rd.In addition; " comprise " and the term of " comprising " and so on represent except have in specification and claims, have directly with the unit of clearly statement with the step, technical scheme of the present invention is not got rid of yet and is had not by directly or other unit of clearly explaining and the situation of step.Moreover the term such as " first ", " second ", " the 3rd " and " the 4th " does not represent that unit or numerical value only are the usefulness of making to distinguish each unit or numerical value in the order of aspects such as time, space, size.
In addition, storage battery described here refers to and can and produce galvanic device with chemical energy transformationization electric energy, and it includes but not limited to lead acid accumulator and lithium battery etc.
Two storage battery car electric power systems
Fig. 1 is the sketch map of exemplary two storage battery car electric power systems.Referring to Fig. 1, this pair storage battery car electric power system 10 comprises control unit 110, generator 120, the first and second storage battery 130A and 130B and first-Di, four switching device K1-K4.In Fig. 1, heavy line is represented power or energy stream, and fine line is represented control signal and measuring-signal stream.It is worthy of note; Though here control unit 110 and first-Di, four switching device K1-K4 and generator 120 link to each other with bus mode; But this and do not mean that control unit and the Be Controlled unit between must be confined to this connected mode, in fact also can adopt point-to-point connected mode between them.
In Fig. 1; Control unit 110 is cores of whole electric power system 10; It is responsible for according to definite suitable electric energy management strategies such as electricity consumption situation (for example using the need for electricity of electric loading 30 and 40), battery condition (for example be here in operating current, operating voltage, temperature, degree of aging and the state-of-charge (SOC) of the first and second storage battery 130A and 130B one or more) and generator states (the for example current operating current that can provide of generator) on the one hand; On the other hand; Control unit 110 also has the DC-to-dc transfer capability, with through boost with reduced pressure operation to the first and second storage battery 130A and 130B suitable charging voltage is provided.Will further describe the above-mentioned functions of control unit 110 below.
As shown in Figure 1, the first storage battery 130A, generator 120 and be connected in parallel to form current supply circuit with electric loading 30.Control unit 110 inserts this current supply circuit through the first switching device K1.Meanwhile, the first storage battery 130A also links to each other with the second storage battery 130B through second switch device K4.On the other hand, the second storage battery 130B, starter 20 and be connected in parallel with electric loading 40 and start the loop to form.Control unit 110 inserts through second switch device K2 should start the loop.Thus, in the electric power system shown in the basis, comprise two continuous passages between first and second storage battery 130A, the 130B, wherein one is passed through control unit 110, and another is Bypass Control unit 110 then.It is worthy of note; Though the usefulness electric loading 30 here and 40 illustrates with two square frames, in fact they refer to two groups and use electric loading, wherein; With electric loading 30 refer to automobile with start irrelevant car electrics; Include but not limited to car light, air blast, air-conditioning and sound equipment etc., and refer to the electronic equipment relevant, include but not limited to various transducers that are used to measure state when starting and electronic control unit (ECU) etc. with automobile starting with electric loading 40.In this example, mainly supply power, and when the second storage battery 130B power supply capacity is not enough, unite to supplying power with electric loading 40 by the first and second storage battery 130A and 130B by the second storage battery 130B with electric loading 40.
In electric power system shown in Figure 1; Control unit 110 utilizes first-Di, four switching device K1-K4 to come turning on and off to realize corresponding electric energy management strategy of control circuit; Wherein, Turning on and off by the first switching device K1 of passage between current supply circuit and the control unit 110 controlled; Start the control that turns on and off of passage between loop and the control unit 110 by second switch device K2, the second storage battery 130B with control with turning on and off of the passage between the electric loading 40 by the 3rd switching device K3, direct continuous turning on and off by the 4th switching device K4 of passage controlled between first and second storage battery 130A, the 130B.All by control unit 110 controls, they for example can be realized by relay for the keying of above-mentioned first-Di, four switching device K1-K4 and disconnection.
In this example, the power supply in automobile starting stage (also be starter 20 and with the power supply of electric loading 40) mainly is responsible for providing by the second storage battery 130B.Since the startup stage need big immediate current, therefore can the second storage battery 130B be designed to compare with the first storage battery 130A, have bigger pole plate area and be beneficial to improve the current strength of output.In addition, mainly supply power with electric loading 30 by the first storage battery 130A and generator 120.Because the characteristics of power supply with electric loading is that long little electric current need be provided, therefore the first storage battery 130A can be designed as with the second storage battery 130B and compares, and on pole plate, forms thicker active material.
Control unit
Fig. 2 is the structural representation of the shown in Figure 1 pair of control unit in the storage battery car electric power system.As shown in Figure 2, control unit 110 comprises device for managing and controlling electrical source 1101, dc-dc conversion device 1102 and battery condition monitoring device 1103.In Fig. 2, heavy line is represented power or energy stream, and fine line is represented control signal and measuring-signal stream.Through the inner LINK bus communication in unit, and device for managing and controlling electrical source 1101 and the battery condition monitoring device 1103 CAN bus through the outside, unit and external equipment (for example first-Di, three switching device K1-K4, with electric loading 30, generator 120 etc.) are communicated by letter between device for managing and controlling electrical source 1101, dc-dc conversion device 1102 and the battery condition monitoring device 1103.
Device for managing and controlling electrical source 1101 is confirmed suitable electric energy management strategy and is generated control commands corresponding according to electricity consumption situation, battery condition and generator state etc.These control commands are provided to and are positioned at control unit 110 inner dc-dc conversion device 1102 and battery condition monitoring device 1103 and are positioned at outside first-Di, the four switching device K1-K4 of control unit 110.Definite mode of relevant electric energy management strategy will be described in detail below.
The output voltage of the in the future spontaneous motor of dc-dc conversion device 1,102 120, the first and second storage battery 130A and 130B is transformed to required direct voltage.For example; Dc-dc conversion device 1102 can be made the DC-to-dc conversion operations so that generator 120 charges to the second storage battery 130B to the output of generator 120, perhaps can make the DC-to-dc conversion operations so that the first storage battery 130A charges to the second storage battery 130B to the output of the first storage battery 130A.And for example, dc-dc conversion device 1102 can be made the DC-to-dc conversion operations so that the second storage battery 130B charges to the first storage battery 130A to the output of the second storage battery 130B.
Battery condition monitoring device 1103 links to each other with transducer with the state parameter (the for example operating voltage of storage battery, operating current and temperature etc.) of monitoring the first and second storage battery 130A and 130B through the CAN bus.The state parameter that records is sent to device for managing and controlling electrical source 1101 through control unit 110 inner LINK buses.Battery condition monitoring device 1103 is configured to have the sensor fault diagnosis function.Particularly; Can be the sensor groups that the first and second storage battery 130A and 130B are equipped with the consistent or basically identical of two groups of performances, and control similarly the utilization rate of two storage batterys or close (for example the difference of the SOC through making the first and second storage battery 130A and 130B remains in the small range).Battery condition monitoring device 1103 can be regularly or is monitored the degree of aging (for example through measuring the internal resistance of two storage batterys) of the first and second storage battery 130A and 130B aperiodically; And if their internal resistance differs big (for example absolute difference surpasses a preset threshold value), then battery condition checkout gear 1103 can judge that sensor groups breaks down.
The balanced control procedure of degree of aging
Below by Fig. 3 an embodiment according to the storage battery degree of aging balance control method in the automobile power supply system of the present invention is described.For setting forth conveniently, be that example is described with the two storage battery car electric power systems shown in Fig. 1 and 2 here.But it should be understood that above-mentioned workflow also can be applicable to two storage battery car electric power systems of other type.
Referring to Fig. 3, in step 310, the battery condition monitoring device 1103 of control unit 110 is measured the state parameter (the for example internal resistance of storage battery) of the first and second storage battery 130A and 130B and is sent to device for managing and controlling electrical source 1101 through the LINK bus.
Subsequently in step 320, the state parameter that device for managing and controlling electrical source 1101 obtains according to battery condition monitoring device 1103 confirms that the first and second storage battery 130A, current the expiring of 130B fill capacity.Generally speaking, accurate measurement is completely filled capacity and need be carried out deep discharge to storage battery, and this is the process of a long heavy-current discharge, and the fail safe that circuit is connected has higher requirement, is not suitable for on-line testing fast.Inventor of the present invention finds through further investigation; There is the relation of confirming in expiring of storage battery between the accumulator internal resistance that fills capacity and record; And for the storage battery of same or similar type (for example physical dimension, electrolyte content and concentration, plate material etc. are same or similar), this relation is substantially the same or similar.Based on these characteristics; Can fill the relation curve between capacity and the internal resistance and be stored in the database through expiring of type under experiment measuring first and second storage batterys; Like this in step 320; Device for managing and controlling electrical source 1101 can pass through Query Database, confirms completely to fill accordingly capability value according to the accumulator internal resistance that obtains in the step 310.
Get into step 330 subsequently, device for managing and controlling electrical source 1101 calculates the degree of aging of the first and second storage battery 130A and 130B.In the present embodiment, for example can adopt the degree of aging A of following formula (1) calculating accumulator:
C wherein
sFor said first and second storage batterys fill capacity, C in expiring of moment t
NIt is the nominal capacity of first and second storage batterys.Obviously, higher A value shows that the degree of aging of storage battery is more serious, and vice versa.
Then get into step 340; Device for managing and controlling electrical source 1101 calculates the gap amount of the degree of aging of the first and second storage battery 130A, 130B, and the degree of aging that for example deducts the second storage battery 130B through the degree of aging with the first storage battery 130A obtains this gap amount.But alternatively, can the degree of aging value of storage battery be divided into a plurality of degree of aging scopes, the corresponding centrifugal pump of each scope.For example can degree of aging be divided into 5 scopes; Be called " life termination ", " heavily aging ", " in aging ", " light aging " and " well " respectively; Each scope is endowed centrifugal pump 1,2,3,4 and 5 respectively according to number range order from big to small; Make degree of aging light more, then corresponding centrifugal pump is big more, and vice versa.It is worthy of note that the size of being divided scope can equate, also can not wait, this depends on the occasion of application.Therefore the degree of aging of situation represent to(for) discrete form; Can; Can give corresponding centrifugal pump according to the degree of aging scope under the degree of aging of the definite storage battery of step 330 earlier, and then the centrifugal pump of being given is subtracted each other to obtain above-mentioned gap amount.
Subsequently, in step 350, device for managing and controlling electrical source 1101 judges whether the gap amount that obtains in the above-mentioned steps 340 drops in the predefined scope [A, B], and wherein the endpoint value of A and this scope of B also is the lower limit and the upper limit.If judged result is true, then finishes this process, otherwise get into step 360.
In step 360, device for managing and controlling electrical source 1101 is provided with corresponding power supply strategy according to the size of gap amount.In the present embodiment; Consider as the second storage battery 130B that starts usefulness and need higher degree of protection; Should make its degree of aging be lighter than the degree of aging of the first storage battery A as far as possible; Therefore but can not make the gap of the two excessive again, the upper and lower bound of above-mentioned predefined scope is set to asymmetricly, and wherein the absolute value of the upper limit is less than the absolute value of lower limit.For example under the situation that degree of aging is represented with discrete form; Can the upper limit be set at 1 and lower limit set is-3; Like this; If gap amount E is greater than 1 (also i.e. the degree of aging of the first storage battery 130A than light 1 gear of degree of aging of the second storage battery 130B or more than the unit value), then device for managing and controlling electrical source 1101 strategy of supplying power is set to: make the state-of-charge of the second storage battery 130B remain on the preset level (for example 90%) and/or during the automobile cold-starting (when for example ambient temperature is lower than 15 degrees centigrade) unite to starter 20 and load 40 by the first and second storage battery 130A, 130B and supply power.On the other hand; If gap amount E is less than-3 (degree of aging that also is the second storage battery 130B is than light 3 gears of degree of aging of the first storage battery 130A or more than the unit value); Then device for managing and controlling electrical source 1101 strategy of supplying power is set to: when generator 120 can't satisfy the supply load of load 30, united to load 30 power supplies by the first and second storage battery 130A, 130B.
Get in the step 370 the power supply strategy that is provided with in device for managing and controlling electrical source 1101 execution in step 360 subsequently.Particularly; For the state-of-charge that makes the second storage battery 130B remains on the preset level (for example 90%); Under the control of device for managing and controlling electrical source 1101; First, second breaks off with the 3rd switching device K1-K3 and the 4th switching device K4 closure; Generator 120 is charged to the second storage battery 130B, and perhaps closed and the 3rd, the 4th switching device K3-K4 disconnection of first, second switching device K1-K2 is made the DC-to-dc conversion operations with the output of the first storage battery 130A so that the first storage battery 130A charges to the second storage battery 130B thus; In order to unite power supply by the first and second storage battery 130A, 130B when the automobile cold-starting; Under the control of device for managing and controlling electrical source 1101; First, second switching device K1-K2 breaks off; Three, the 4th switching device K3-K4 is closed, realizes that thus the first and second storage battery 130A, 130B are to starter 20 and load 40 power supplies; In order when generator 120 can't satisfy the supply load of load 30, to unite to load 30 power supplies by the first and second storage battery 130A, 130B; Under the control of device for managing and controlling electrical source 1101; The second and the 3rd switching device K2-K3 breaks off and the first and the 4th switching device K1, K4 closure, sets up the first and second storage battery 130A, the 130B power supply passage to load 30 thus.
The measurement of accumulator internal resistance
The method of measurement of accumulator internal resistance is below described.Generally speaking, the impedance Z of storage battery can be represented as follows:
Z＝Z
++Z
-+R
ohm (2)
Wherein, Z
+And Z
-Represent the both positive and negative polarity impedance respectively, R
OhmThe expression ohmage.
Battery impedance is a complex impedance, and is relevant with test frequency, therefore can adopt alternating current method to measure the internal resistance of storage battery.
Because the internal resistance of cell is the milliohm level, in order to prevent bigger error, often adopts the four-wire system metering system, that is, when measuring, two terminals apply the constant alternating current driver current signal of certain frequency, and two terminals are used for measuring in addition.In practical application, because FD feed is fainter, be interfered easily, for this reason, the special proposition of inventor of the present invention circuit shown in Figure 4 overcomes interference signal.
As shown in Figure 4, this circuit comprises controlled current source 410, exchanges amplifying unit 420, synchronous detection unit 430, low-pass filter unit 440 and control unit 450.Controlled current source 410 applies constant alternating current driver signal through two terminals at the two ends of storage battery 500; Exchange amplifying unit 420 and be used for the voltage signal that storage battery 500 produces is amplified, amplifying signal and rectified signal that synchronous detection unit 430 will exchange amplifying unit 420 multiply each other.In circuit shown in Figure 4, control unit 450 and controlled current source 410 and 430 couplings of synchronous detection unit provide clock signal with synchronization motivationtheory signal and rectified signal to them.440 of low-pass filter units are made low-pass filtering treatment to the signal after the detection.
The principle of utilizing foregoing circuit to measure accumulator internal resistance is below described.
Suppose that the operating current I of controlled current source 410 and the response voltage U of storage battery 500 are respectively:
I＝I
max?Sin(ωt) (3)
Wherein, I and U are respectively the amplitude of operating current and response voltage; ω is the frequency of alternating current driver signal, and
is the phase difference between pumping signal and the response signal.
Thus, the impedance Z of storage battery can be expressed as:
Therefore the ohmage of storage battery is:
In addition, the signal amplification factor of supposing interchange amplifying unit 420 is K times, and rectified signal and pumping signal are with frequency and be expressed as Esin (ω t), and wherein E is the amplitude of rectified signal, and then the battery voltage measuring signal after the synchronous detection is:
Through after the low-pass filtering treatment, the size of battery voltage measuring signal is:
The ohmic internal resistance R that comprehensive following formula (6) and (8) then can obtain storage battery is:
Because multiplication factor K, synchronous detection signal amplitude E and excitation signal amplitude I
MaxBe known quantity and can therefore can confirm the internal resistance R of storage battery through measuring the battery voltage measuring signal after the low-pass filtering treatment through computing.Accumulator internal resistance measurement method based on above-mentioned principle has plurality of advantages such as realization is simple, precision is high, real time response speed is fast.
Because can be under the spirit that does not deviate from essential characteristic of the present invention; With the various forms embodiment of the present invention; Therefore this execution mode is illustrative rather than restrictive, owing to scope of the present invention is defined by accompanying claims, rather than is defined by specification; Therefore fall into the border and the interior all changes of boundary of claim, or the equivalent of this claim border and boundary thereby forgiven by claim.
Claims (10)
1. the balance control method of the storage battery degree of aging in the automobile power supply system; The said pair of storage battery car electric power system comprise generator, and said generator parallel coupled with first storage battery that forms current supply circuit, with the starter parallel coupled with second storage battery that forms the startup loop and controllably be coupling in said current supply circuit and said startup loop between control unit; Wherein, comprise the following step:
Said control unit is confirmed the degree of aging of said first and second storage batterys;
Said control unit is confirmed the gap amount of the degree of aging of said first and second storage batterys;
If the gap amount of the degree of aging of said first and second storage batterys departs from predefined scope, then said control unit is through adopting corresponding power supply strategy so that the degree of aging of said first and second storage batterys reaches unanimity.
2. the method for claim 1, wherein said control unit is confirmed the degree of aging A of said first and second storage batterys according to following formula:
Wherein, C
s(t) completely fill capacity for said first and second storage batterys at moment t, C
NIt is the nominal capacity of first and second storage batterys.
3. method as claimed in claim 2, wherein, said first and second storage batterys completely fill capacity C at moment t
s(t) internal resistance through measuring said first and second storage batterys and confirm according to the relation of predetermined internal resistance-completely fill between the capacity.
4. method as claimed in claim 3, wherein, the internal resistance of said first and second storage batterys adopts alternating current method to record.
5. the method for claim 1, wherein the upper and lower bound of said predefined scope is asymmetric.
6. the method for claim 1, wherein said degree of aging is divided into a plurality of scopes, the corresponding centrifugal pump of each scope, and said control unit is confirmed the gap amount of the degree of aging of said first and second storage batterys according to following manner:
It is mapped as corresponding centrifugal pump according to the big young pathbreaker of the degree of aging of said first and second storage batterys; And
The centrifugal pump of the degree of aging of said first and second storage batterys is subtracted each other to confirm said gap amount.
7. method as claimed in claim 6, wherein, the quantity of said scope is five, gives centrifugal pump 1,2,3,4 and 5 respectively according to order from big to small.
8. method as claimed in claim 5, wherein, said control unit is according to following manner, through adopting corresponding power supply strategy so that the degree of aging of said first and second storage batterys reaches unanimity:
If said gap amount exceeds the upper limit of said preset range, then said control unit remains on the preset level state-of-charge of said second storage battery; If said gap amount exceeds the lower limit of said preset range, then when the power consumption equipment of automobile needed storage battery power supply, said control unit was supplied power said first and second storage batterys simultaneously, and said first threshold is less than said second threshold value.
9. method as claimed in claim 8, wherein, said control unit remains on the preset level state-of-charge of said second storage battery according to following manner:
When the state-of-charge of said second storage battery during less than said preset level; If automobile is in the power load of the power supply capacity of transport condition and said generator greater than automobile; Then said control unit makes said generator reach said preset level to said second charge in batteries up to the state-of-charge of said second storage battery; Otherwise said control unit makes said first storage battery reach said preset level to said second charge in batteries up to the state-of-charge of said second storage battery.
10. method as claimed in claim 5, wherein, said control unit is according to following manner, through adopting corresponding power supply strategy so that the degree of aging of said first and second storage batterys reaches unanimity:
When said gap amount exceeds going up in limited time of said preset range, if ambient temperature is lower than a preset value, then when automobile starting, said control unit makes said first and second storage batterys simultaneously to said starter power supply.
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| CN104823065A (en) * | 2012-11-28 | 2015-08-05 | 索尼公司 | Control apparatus, control method, power supply system, and electric vehicle |
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| CN104823065A (en) * | 2012-11-28 | 2015-08-05 | 索尼公司 | Control apparatus, control method, power supply system, and electric vehicle |
| CN104823065B (en) * | 2012-11-28 | 2017-12-29 | 索尼公司 | Control device, control method, power-supply system and electric vehicle |
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