CN104749527A - Method and device used for determining health condition of battery fuse - Google Patents
Method and device used for determining health condition of battery fuse Download PDFInfo
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- CN104749527A CN104749527A CN201510141349.1A CN201510141349A CN104749527A CN 104749527 A CN104749527 A CN 104749527A CN 201510141349 A CN201510141349 A CN 201510141349A CN 104749527 A CN104749527 A CN 104749527A
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Abstract
The invention provides a method and a device used for determining health condition of a battery fuse. The method includes: detecting value of current flowing through the fuse; calculating actual load-resisting strength of the fuse according the current value, wherein the actual load-resisting strength is used for indicating actual electro-thermal aging degree of the fuse; determining the health state of the fuse by comparing the actual load-resisting strength with preset load-resisting strength.
Description
Technical field
The present invention relates to field of batteries, and more specifically, the present invention relates to a kind of method and apparatus for determining battery fuse health status.
Background technology
In order to provide electric energy, in the various electrical equipments of the such as vehicles, be all equipped with battery.Depend on himself characteristic, battery can suffer aging impact.Agingly refer to the deterioration of all parts in battery in the related fields such as function and performance.
In order to avoid the continuous increase along with degradation, there is catastrophic failure in some parts of battery, thus cause battery to occur overall failure, the degradation (or on the contrary, expressing the functional performance of this battery component) that index " health status (SOH) " expresses battery component can be passed through.Such as, there is many known methods for determining the health status of the battery unit (cell) as one of battery critical component.
But, although fuse is one of critical component in battery equally, still do not have a kind of method to may be used for determining the health status of battery fuse at present.
Summary of the invention
In order to solve the problems of the technologies described above, according to an aspect of the present invention, provide a kind of method for determining battery fuse health status, described method comprises: detect the current value flowing through described fuse; Calculate the reality resistance to year intensity of described fuse according to described current value, described reality resistance to year intensity is for representing the actual electrical heat ageing degree of described fuse; And preset by more described reality resistance to year intensity and one health status that resistance to year intensity determines described fuse.
In addition, according to a further aspect in the invention, provide a kind of device of health status of the fuse for determining battery, described device comprises: current value detecting unit, for detecting the current value flowing through described fuse; Resistance to year Strength co-mputation unit, for calculating the reality resistance to year intensity of described fuse according to described current value, described reality resistance to year intensity is for representing the actual electrical heat ageing degree of described fuse; And health status determining unit, for presetting by more described reality resistance to year intensity and one health status that resistance to year intensity determines described fuse.
Compared with prior art, adopt the method and apparatus for determining battery fuse health status according to the embodiment of the present invention, the reality resistance to year intensity of described fuse can be calculated according to the current value flowing through battery fuse, and preset by more described reality resistance to year intensity and one health status that resistance to year intensity determines described fuse.Therefore, the present invention proposes the health status that a kind of method and apparatus may be used for determining battery fuse, to change in time and fuse can be avoided to occur catastrophic failure due to overload work.
And then, adopting the health status method and apparatus for determining battery fuse according to the embodiment of the present invention, reasonably can also determine the actual performance parameter of described battery according to the health status based on determined described fuse.Therefore, the present invention proposes a kind of method and apparatus and reasonably can utilize battery, to ensure to make this battery carry out work with maximized performance, the situation of fuse overload work can not be caused again, thus obtain one more reasonably functional realiey mode.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from instructions, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in instructions, claims and accompanying drawing and obtain.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for instructions, together with embodiments of the present invention for explaining the present invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 illustrates the deterioration of battery performance with life time.
Fig. 2 illustrates the primary structure of the battery according to the embodiment of the present invention.
Fig. 3 illustrates the method for the health status of the fuse for determining battery according to the embodiment of the present invention.
Fig. 4 illustrates the method for the health status of the fuse for determining battery according to the concrete example of the embodiment of the present invention.
Fig. 5 illustrates the device of the health status of the fuse for determining battery according to the embodiment of the present invention.
Fig. 6 illustrates the battery management system according to the embodiment of the present invention.
Embodiment
Describe in detail with reference to the accompanying drawings according to each embodiment of the present invention.Here it is to be noted that it in the accompanying drawings, identical Reference numeral is given there is identical or similar structures and function ingredient substantially, and the repeated description of will omit about them.
First, by the basic structure of the key concept and battery that describe cell degradation briefly, so that understand embodiments of the invention better.
Because all parts of inside battery exists problem of aging, so battery is often designed to have limited serviceable life.In this length of life, battery is desirably in the aspects such as power, energy and efficiency and realizes expected design performance.If the deterioration of any parts of battery or degradation reach the degree making this battery cannot realize this expected design performance again, then can think that this battery is beyond its serviceable life, or according to definition, can say that this battery has reached it and " stopped the life-span (EOL) ".The termination life-span is a concept relative to " INITIATION LIFE (BOL) ".Under normal circumstances, battery is designed to: this battery (that is, a kind of " brand-new " situation under) when INITIATION LIFE provides the ability of power and performance and efficiency to be all better than its level when stopping the life-span.
Fig. 1 illustrates the deterioration of battery performance with life time.
As illustrated in figure 1, battery is when BOL situation, and the actual performance of its each side can reach the availability performance of 100%.Along with the continuous use of battery, all parts of inside battery is subject to the impact of problem of aging, thus causes the actual performance of its each side constantly to decline, and moves closer to the EOL situation of the degree wherein just reaching expected design performance.Next, after exceeding expected design EOL situation, battery also can not lose efficacy usually at once.But it is below horizontal that the power of this battery and the aspect such as the available grades of energy characteristics and efficiency little by little will be reduced to expected design continuously.This is a very important factor, because after more than EOL situation, the use below horizontal of the expected design handled up at power or energy of battery will make the ageing component overload work of battery, thus may cause the ultimate failure of these parts, and finally make whole battery failure.
As a rule, in existing system, the performance of battery within the whole expected life time is often limited to its EOL specification.That is, available battery performance is restricted to level during EOL situation by the functional realiey obtained by the software algorithm in battery management system and calibration mapping in whole battery life.
In fact, the functional realiey of this standard is a kind of compromise, whole operation lifetime time durations between BOL and EOL, in fact spendable for battery electrical performance is restricted to below potential available electrical performance by it, thus causes battery to fail to play maximum utility; On the contrary, after more than EOL situation, from battery, the electrical performance more electrical performance safer than in fact possibility is extracted because it does not stop, so according to the cumulative aging performance of some battery critical component, it has carried out overload work (overstress) to battery, thus causes battery may face overall failure at any time.In other words, to the helpless half-way house of Power System Performance and high-tension battery and high voltage component security (namely way of the prior art is, by considering the factor of these two aspects, set the fixing maximum I/O power of a compromise), therefore, between BOL and EOL, above-mentioned half-way house fails to make battery realize the maximization of Power System Performance, and after more than EOL, so do and battery overload work may be made.
As described in the background art, in order to weigh the physical unit degradation (or residue functional performance of all parts) of battery, " health status (SOH) " this concept is proposed.Typically define according to one, SOH with reference to BOL or EOL situation, and can express according to the number percent of availability performance.Such as, SOH can be defined based on BOL situation, wherein BOL=100%SOH.So EOL will be the value less than BOL, such as, EOL=80%SOH.Next, at battery after 80% place of health status arrives the expected design termination life-span, if performance, power and energy are handled up be adjusted to the lower value of the SOH reflecting reduction, then this battery is by with the performance reduced continuously (such as, be reduced to the low-down value (such as, 50%SOH) of SOH) keep work.
In electrical equipment, for the vehicles of such as vehicle and so on, battery (or being referred to as battery management system) can be connected to high-tension circuit and high-voltage interlocking loop (HVIL) by connection terminal, carries out work to drive electrical equipment.Wherein, battery can be the various devices that can produce electric energy, such as, comprise chemical cell, photoelectric cell, fuel cell etc.; High-tension circuit can be the circuit of powering to the consuming parts (such as, inverter or motor etc.) of the high-pressure system of electrical equipment (such as, vehicle); And high-voltage interlocking loop is a kind of interlock circuit of low-voltage, for controlling this high-tension circuit.Such as, when high-voltage interlocking loop detects that the somewhere of high-tension circuit occurs connecting fault, high-voltage interlocking loop can be transmitted fault-signal and be disconnected to control high-tension circuit, thus ensures the personal safety of electrical equipment operating personnel.
, will the primary structure of battery be described in detail below, and particularly describe and may impel cell degradation and the critical piece reaching its EOL state.
Fig. 2 illustrates the primary structure of the battery according to the embodiment of the present invention.
As illustrated in Figure 2, battery system 10 mainly comprises following critical piece: battery unit (cell) 11, manual maintenance make and break device (MSD) 12, fuse 13 and contactor 14 etc.In addition, this battery system 10 also comprises control module (not shown).
Battery unit 11 refers to single battery.In order to for high-power or jumbo application, such as, drive the motor etc. of vehicle, multiple battery units 11 can be set as the form of " electric battery ".Usually, electric battery is formed by connecting (such as, series, parallel or both combinations) some single battery unit 11.
Manual maintenance make and break device 12 is vitals of protection electrical equipment (such as, the vehicles) high-tension circuit Electrical Safety.In order to ensure operator safety, MSD is connected in high-voltage interlocking loop, and can manually be removed.In the process removing MSD, namely high-voltage interlocking loop can detect that this removes operation and disconnects prior to high-tension circuit, and then notice control module disconnects high-tension circuit, thus avoids the high pressure Danger Electric shock risk of operating personnel.
Fuse 13 is connected to described high-tension circuit, so that when breaking down, prevents whole high-tension circuit from damaging by fuse wire 13 in advance.Typically, this fuse 13 can be included in described manual maintenance make and break device 12.But needn't elaborate any further, the particular location of fuse 13 in battery system 10 does not form the restriction for scope.
Contactor 14 is for being connected to high-tension circuit by battery system 10.Particularly, manual maintenance make and break device 12 is connected to battery unit 11 by the connection 15 on it, and battery unit 11 is finally connected to high-tension circuit by contactor 14.
In the said structure of battery system 10, there are four critical components and battery system 10 may be impelled to reach the termination life-span: the connection 15 on battery unit 11, fuse 13, contactor 14 and MSD.
At present, there is many known methods for determining the health status of the battery unit as one of battery critical component.But, equally as the critical component in battery, still do not have a kind of method to may be used for determining its health status at present.Due to when exceeding expected design EOL situation, fuse may produce catastrophic failure (such as, due to aging and fuse), thus causes the global failure of battery, and this obviously undesirably occurs.
In view of this, according in the method and apparatus of the embodiment of the present invention, present inventors have proposed a kind of method and apparatus of health status of the fuse for determining battery, it can determine the health status of this fuse according to the electric current flowing through fuse.
Hereinafter, the overall procedure example of the method for the health status of the fuse for determining battery according to the embodiment of the present invention is described with reference to Fig. 3.
Fig. 3 illustrates the method for the health status of the fuse for determining battery according to the embodiment of the present invention.
As shown in Figure 3, the health status defining method of battery fuse can comprise:
In step s 110, the current value flowing through described fuse is detected.
In one example, can in the battery of electrical equipment (such as, the vehicles of such as vehicle and so on) arrange current sensor, and use this current sensor to detect the current value flowing through described fuse.Current sensor is a kind of pick-up unit, it can sense the information of tested electric current, and the information that the information detected can be for conversion into according to certain rules electric signal or other desired forms meeting certain standard needs exports, to meet the requirements such as the transmission of information, process, storage, display, record and control.Such as, the various current sensors of such as shunt, electromagnetic current transducer, electronic current mutual inductor and so on can be used here to detect the current value flowing through described fuse.
In the step s 120, the reality resistance to year intensity of described fuse is calculated according to described current value.
Here, described reality resistance to year intensity may be used for the actual electrical heat ageing degree representing described fuse, and this thermal-electrical aging degree causes due to the high electric current build-up effect in time flowing through fuse.Within actual resistance to year, intensity can be determined based on the physical relation between the electric energy of the hear rate the subject of knowledge and the object of knowledge in time of the internal resistance by fuse dissipation and consequent fuse performance degradation.Such as, described reality resistance to year intensity can be the thermal energy consumption that described fuse produces in time under unit resistance.
Therefore, this step S120 can comprise: square calculate described reality resistance to year intensity relative to the integrated value of time by what calculate described current value.
In step s 130, which, preset by more described reality resistance to year intensity and one health status that resistance to year intensity determines described fuse.
In one example, this presets the maximum permission parts resistance to year intensity that resistance to year intensity can be described fuse.Such as, these maximum permission parts resistance to year intensity presets when dispatching from the factory for different fuse, and is associated with the termination life value of the performance capability of described fuse.
But, it should be noted that, the present invention is not limited thereto.Such as, described maximum permission parts resistance to year intensity can also be relevant to the maximum current about fuse curve, and this maximum current is the electric current of (new or not aged) fuse of fusing in the given time.More generally, described maximum permission parts resistance to year intensity can be to the build-up effect in time of the high electric current owing to flowing through fuse and the relevant any variable of the thermal-electrical aging caused.
So, can determine whether fuse arrives based on these maximum permission parts resistance to year intensity and stop life time EOL, and then weigh the health status of fuse.
At this moment, this step S130 can comprise: the maximum permission parts resistance to year intensity of more described reality resistance to year intensity and described fuse; Be greater than described reality resistance to year intensity in response to described maximum permission parts resistance to year intensity, judge that described fuse not yet arrives termination life time; Equal described reality resistance to year intensity in response to described maximum permission parts resistance to year intensity, judge that described fuse just arrives described termination life time; And be less than described reality resistance to year intensity in response to described maximum permission parts resistance to year intensity, judge that described fuse has exceeded described termination life time.
Such as, when judging that fuse not yet arrives termination life time, can determine that fuse is in health status, and when judging that fuse arrives or exceedes termination life time, can determine that fuse is in unhealthy status.
In another example, this presets the normal component resistance to year intensity that resistance to year intensity can be described fuse.Such as, this normal component resistance to year intensity presets when dispatching from the factory for different fuse, and is associated with the normal use value of the performance capability of described fuse.
So, the health status of fuse directly can be weighed based on this normal component resistance to year intensity.
At this moment, this step S130 can comprise: the normal component resistance to year intensity of more described reality resistance to year intensity and described fuse; Equal normal component resistance to year intensity in response to described reality resistance to year intensity, judge that described fuse is in normal service life; And be greater than normal component resistance to year intensity in response to described reality resistance to year intensity, judge that described fuse exceeds normal service life.
Such as, when judging that fuse is in normal service life, can determine that fuse is in health status, and when judging that fuse exceeds normal service life, can determine that fuse is in unhealthy status.
In another example, this presets resistance to year intensity can depend on that the maximum permission parts resistance to year intensity of described fuse and normal component resistance to year intensity are determined.Such as, this presets the mean value that resistance to year intensity can be maximum permission parts resistance to year intensity and normal component resistance to year intensity.
So, can determine whether fuse arrives the half of normal service life based on the mean value of these maximum permission parts resistance to year intensity and normal component resistance to year intensity, and then weigh the health status of fuse.
At this moment, this step S130 can comprise: the maximum permission parts resistance to year intensity of more described reality resistance to year intensity and described fuse and the mean value of normal component resistance to year intensity; Be greater than described reality resistance to year intensity in response to described mean value, judge that described fuse not yet arrives the half of normal service life; Equal described reality resistance to year intensity in response to described mean value, judge that described fuse just arrives the half of described normal service life; And be less than described reality resistance to year intensity in response to described mean value, judge that described fuse has exceeded the half of described normal service life.
Such as, judging that fuse not yet arrives a half of normal service life, can determine that fuse is in health status, and judging that fuse arrives or exceedes a half of normal service life, can determine that fuse is in unhealthy status, or also can whether arrive by judging further described fuse or exceed stop life time determine whether fuse enters unhealthy status.
Next, after the health status determining described fuse, above-mentioned information can be pointed out by various mode to user, to arouse the attention of user, make user's instantaneously changing be in the fuse of unhealthy status, thus ensure the normal use of electrical equipment.
Such as, visually can be pointed out the health status etc. of described fuse to user by visual cues device (pilot lamp).The light on and off of pilot lamp, different colours, different display effects (such as, long bright or flicker) can be utilized to point out fuse whether to be in health status etc.Or the mode that also can export sound (such as, alarm sound) by sound prompt device is pointed out.In addition, the portable set (such as, mobile phone) that the information whether being in health status about fuse is transferred to user by wired or wireless mode can also be pointed out to user more easily.
Alternatively or cumulatively, after the health status determining described fuse, described method can also comprise: the health status based on described fuse determines the actual performance parameter of described battery.
By carrying out according to the health status of described fuse the actual performance parameter more reasonably determining described battery, the various problems that compromise functional realiey of the prior art causes can be solved, namely between BOL and EOL, fail to make battery realize the maximization of Power System Performance, and after more than EOL, battery fuse overload work may be made again.
In a first example, health status based on described fuse determines that the actual performance parameter of described battery can comprise: the health status in response to described fuse indicates described fuse and not yet arrives and stop life time or just arrive described termination life time, according to described reality resistance to year intensity, describedly presets the first power capacity factor that resistance to year intensity and the first factor of safety determine described battery; And according to described first power capacity Summing Factor the nominal maximum permission throughput power of battery calculate when described fuse not yet arrives described termination life time or just arrives described termination life time, the maximum permission throughput power of reality of described battery, wherein, the reality of described battery maximum permission throughput power is more than or equal to the maximum permission throughput power of nominal of described battery.
By aforesaid operations, the maximum throughput power that battery carries out operating between BOL and EOL can be obtained.
With the first example alternatively or cumulatively, in the second example, health status based on described fuse determines that the actual performance parameter of described battery can comprise: the health status in response to described fuse indicates described fuse and not yet arrives and stop life time or just arrive described termination life time, according to described reality resistance to year intensity, describedly presets the second power capacity factor that resistance to year intensity and the second factor of safety determine described battery; And according to described second power capacity Summing Factor the nominal maximum permission time for described nominal maximum permission throughput power of battery calculate when described fuse not yet arrives described termination life time or just arrives described termination life time, of described battery, wherein, the reality maximum permission time for described reality maximum permission throughput power of described battery is more than or equal to the nominal maximum permission time for described nominal maximum permission throughput power of described battery.
By aforesaid operations, the maximum permission time that battery carries out with maximum throughput power operating between BOL and EOL can be obtained.
In the 3rd example, health status based on described fuse determines that the actual performance parameter of described battery can comprise: the health status in response to described fuse indicates described fuse and just arrives and stop life time or exceeded described termination life time, according to described reality resistance to year intensity, describedly presets the 3rd power capacity factor that resistance to year intensity and the 3rd factor of safety determine described battery; And according to described 3rd power capacity Summing Factor the nominal maximum permission throughput power of battery calculate when described fuse just arrives described termination life time or exceeded described termination life time, the maximum permission throughput power of reality of described battery, wherein, the reality of described battery maximum permission throughput power is less than or equal to the maximum permission throughput power of nominal of described battery.
By aforesaid operations, battery can be obtained and operate after more than EOL, and the maximum throughput power of battery fuse overload work can not be made.
With the 3rd example alternatively or cumulatively, in the 4th example, health status based on described fuse determines that the actual performance parameter of described battery can comprise: the health status in response to described fuse indicates described fuse and not yet arrives and stop life time or just arrive described termination life time, according to described reality resistance to year intensity, describedly presets the 4th power capacity factor that resistance to year intensity and the 4th factor of safety determine described battery; And according to described 4th power capacity Summing Factor the nominal maximum permission time for described nominal maximum permission throughput power of battery calculate when described fuse just arrives described termination life time or exceeded described termination life time, of described battery, wherein, the reality maximum permission time for described reality maximum permission throughput power of described battery is less than or equal to the nominal maximum permission time for described nominal maximum permission throughput power of described battery.
By aforesaid operations, battery can be obtained and operate with maximum throughput power after more than EOL, and the maximum permission time of battery fuse overload work can not be made.
Finally, after the actual performance parameter determining described battery, described method can also comprise: the current performance adjusting described battery according to described actual performance parameter.Namely, more reasonably adjust the current performance of battery, with the maximization making this battery realize Power System Performance between BOL and EOL, and also can ensure that battery is while realizing certain Power System Performance, there will not be overload work after more than EOL.
As can be seen here, adopt the method according to the health status of the fuse for determining battery of the embodiment of the present invention, the reality resistance to year intensity of described fuse can be calculated according to the current value flowing through battery fuse, and preset by more described reality resistance to year intensity and one health status that resistance to year intensity determines described fuse.Therefore, the present invention proposes the health status that a kind of method may be used for determining battery fuse, to change in time and fuse can be avoided to occur catastrophic failure due to overload work.
And then, adopting the method for the health status of the fuse for determining battery according to the embodiment of the present invention, reasonably can also determine the actual performance parameter of described battery according to the health status based on determined described fuse.Therefore, the present invention proposes a kind of method and reasonably can utilize battery, to ensure to make this battery carry out work with maximized performance, the situation of fuse overload work can not be caused again, thus obtain one more reasonably functional realiey mode.
Hereinafter, the concrete example of the method for the health status of the fuse for determining battery according to the embodiment of the present invention is described with reference to Fig. 4.
In this concrete example, suppose that this battery may be used for the vehicles (such as, vehicle) power, and suppose that the health status defining method of this battery fuse can be a kind of algorithm that will realize in the controller of battery management system, the information that this algorithm can utilize battery management system to collect is to calculate the health status of battery fuse.
Fig. 4 illustrates the method for the health status of the fuse for determining battery according to the concrete example of the embodiment of the present invention.
As shown in Figure 4, the health status defining method of battery fuse can comprise:
In step S210, detect the current value flowing through described fuse.
Such as, can arrange a current sensor at the battery fuse place of vehicle, this current sensor can measure the current value flowing through fuse, and the information about this current value is sent to the controller of battery management system.
In step S220, calculate the reality resistance to year intensity of described fuse according to described current value.
The controller of battery management system can use the information collected by current sensor to create resistance to year intensity factor X (I, t), the resistance to year intensity of the reality as described fuse.
Resistance to year intensity factor X (I, t) be that the physical relation between electric energy and consequent fuse performance degradation dissipated based on the hear rate the subject of knowledge and the object of knowledge in time of the internal resistance by fuse is determined.
Such as, can by calculate flow through the current value of fuse square calculate resistance to year intensity factor X (I, t) relative to the integrated value of running time, as shown in equation (1):
X (I, t)=∫ I
2dt equation (1)
Wherein, I is the current value flowing through fuse, and t is the running time.
In step S230, judge that described fuse is between BOL and EOL situation, to be also above EOL situation by the maximum permission parts resistance to year intensity of more described reality resistance to year intensity and described fuse.
As the time integral of squared current, specific maximum permission resistance to year intensity factor value X when resistance to year intensity factor X (I, t) and product design
_ maxrelevant.
Further, in order to describe the health status of fuse, the concept of correlation factor Δ X (also becoming aging factor) is introduced.Such as, this correlation factor Δ X can be the difference of the complete executive capability of residue with the residual life time, as shown in equation (2):
Δ X=X
_ max-X (I, t) equation (2)
Wherein, specific maximum permission resistance to year intensity factor value X during product design
_ maxcan be including, but not limited to: the end of life X of fuse performance capability
@EOL, as shown in equation (3):
X
_ max=X
@EOLequation (3)
Obviously, based on the physical significance of above-mentioned variable, can find out, before parts arrive EOL situation, correlation factor Δ X is just; When parts arrive EOL situation, correlation factor Δ X is 0; And after parts are more than EOL situation, correlation factor Δ X becomes negative.
Therefore, can by judging that the symbol of correlation factor Δ X determines the health status of fuse.
Be between BOL and EOL situation once the health status of fuse indicates described battery, then the method proceeds to step S240 and/or S250.On the contrary, once the health status of fuse indicates described battery more than EOL situation, then the method proceeds to step S260 and/or S270.
In step S240, adjust the maximum permission throughput power of the reality of described battery between BOL and EOL situation.
As previously mentioned, the maximum permission throughput power of nominal of described battery (during charge or discharge) is determined with reference to EOL situation, and it is designated P
_ EOL.So, between BOL and EOL situation, can power capability factor Y be passed through
_ P_BOL_EOLcorrection is carried out to generate the reality maximum permission throughput power P (I, t) of described battery (during charge or discharge), as shown in equation (4) to the nominal of described battery maximum permission throughput power:
P (I, t)=Y
_ P_BOL_EOL× P
_ EOL+ P
_ EOLequation (4)
Wherein, power capability factor Y
_ P_BOL_EOLcan be factor of safety S
1with the product of correlation factor Δ X, as shown in equation (5):
Y
_ P_BOL_EOL=S
1× Δ X equation (5)
Wherein, factor of safety S
1can determine by analysis or based on experiment, typically, this factor of safety S
1value can be less than or equal to 1.
In step s 250, the reality maximum permission time for described reality maximum permission throughput power of described battery between BOL and EOL situation is adjusted.
As previously mentioned, the nominal maximum permission time for described nominal maximum permission throughput power of described battery (during charge or discharge) is determined with reference to EOL situation, and it is designated T
_ P_EOL.So, between BOL and EOL situation, can power capability factor Y be passed through
_ T_BOL_EOLcorrection is carried out to generate the reality maximum permission time T (I for described reality maximum permission throughput power of described battery (during charge or discharge) to the nominal maximum permission time for described nominal maximum permission throughput power of described battery, t), as shown in equation (6):
T (I, t)=Y
_ T_BOL_EOL× T
_ P_EOL+ T
_ P_EOLequation (6)
Wherein, power capability factor Y
_ T_BOL_EOLcan be factor of safety S
2with the product of correlation factor Δ X, as shown in equation (7):
Y
_ T_BOL_EOL=S
2× Δ X equation (7)
Wherein, factor of safety S
2can determine by analysis or based on experiment, typically, this factor of safety S
2value can be less than or equal to 1.
As can be seen here, for being in for the battery that is better than in EOL situation, compared with prior art, the power that increases and performance number can be allowed safely by above-mentioned step S240 and/or S250, and battery fuse overload work can not be made.
In step S260, adjust described battery more than the maximum permission throughput power of the reality after EOL situation.
As previously mentioned, the maximum permission throughput power of nominal of described battery (during charge or discharge) is determined with reference to EOL situation, and it is designated P
_ EOL.So, after more than EOL situation, can power capability factor Y be passed through
_ P_ > _ EOLcorrection is carried out to generate the reality maximum permission throughput power P (I, t) of described battery (during charge or discharge), as shown in equation (8) to the nominal of described battery maximum permission throughput power:
P (I, t)=P
_ EOL-Y
_ P_ > _ EOL× P
_ EOLequation (8)
Wherein, power capability factor Y
_ P_ > _ EOLcan be factor of safety S
3with the product of correlation factor Δ X, as shown in equation (9):
Y
_ P_ > _ EOL=S
3× Δ X equation (9)
Wherein, factor of safety S
3can determine by analysis or based on experiment, typically, this factor of safety S
3value can be less than or equal to 1.
In step S270, adjust described battery more than the reality maximum permission time for described reality maximum permission throughput power after EOL situation.
As previously mentioned, the nominal maximum permission time for described nominal maximum permission throughput power of described battery (during charge or discharge) is determined with reference to EOL situation, and it is designated T
_ P_EOL.So, after more than EOL situation, can power capability factor Y be passed through
_ T_ > _ EOLcorrection is carried out to generate the reality maximum permission time T (I for described reality maximum permission throughput power of described battery (during charge or discharge) to the nominal maximum permission time for described nominal maximum permission throughput power of described battery, t), as shown in equation (10):
T (I, t)=T
_ P_EOL-Y
_ T_BOL_EOL× T
_ P_EOLequation (10)
Wherein, power capability factor Y
_ T_ > _ EOLcan be factor of safety S
4with the product of correlation factor Δ X, as shown in equation (11):
Y
_ T_ > _ EOL=S
4× Δ X equation (11)
Wherein, factor of safety S
4can determine by analysis or based on experiment, typically, this factor of safety S
4value can be less than or equal to 1.
As can be seen here, for being in for the battery later more than EOL situation, compared with prior art, the ratio determined with instantaneous and the available function of reality and energy (time of power availability) safety can be allowed safely to use battery by above-mentioned step S260 and/or S270, and battery fuse overload work can not be made.
Hereinafter, the functional configuration block diagram of the device of the health status of the fuse for determining battery according to the embodiment of the present invention is described with reference to Fig. 5.
Fig. 5 illustrates the device of the health status of the fuse for determining battery according to the embodiment of the present invention.
The method of the health status of the fuse for determining battery illustrated in Fig. 3 can be realized by the device 100 of the health status of the fuse for determining battery illustrated in Fig. 5.
As illustrated in fig. 5, the health status determining device 100 of described battery fuse can comprise: current value detecting unit 110, resistance to year Strength co-mputation unit 120 and health status determining unit 130.In addition, the health status determining device 100 of described battery fuse is also to comprise: performance parameter determining unit 140 and performance parameter adjustment unit 150.
This flow valuve detecting unit 110 may be used for detecting the current value flowing through described fuse.
This resistance to year Strength co-mputation unit 120 may be used for the reality resistance to year intensity calculating described fuse according to described current value, and described reality resistance to year intensity is for representing the actual electrical heat ageing degree of described fuse.
This health status determining unit 130 may be used for presetting by more described reality resistance to year intensity and one health status that resistance to year intensity determines described fuse.
In one example, this flow valuve detecting unit 110 can use the current sensor be arranged near battery fuse to detect the current value flowing through described fuse.
In one example, described resistance to year Strength co-mputation unit 120 square can calculate described reality resistance to year intensity relative to the integrated value of time by what calculate described current value.
In one example, described health status determining unit can the maximum permission parts resistance to year intensity of more described reality resistance to year intensity and described fuse; Be greater than described reality resistance to year intensity in response to described maximum permission parts resistance to year intensity, judge that described fuse not yet arrives termination life time; Equal described reality resistance to year intensity in response to described maximum permission parts resistance to year intensity, judge that described fuse just arrives described termination life time; And be less than described reality resistance to year intensity in response to described maximum permission parts resistance to year intensity, judge that described fuse has exceeded described termination life time.
Particularly, described maximum permission parts resistance to year intensity can be associated with the termination life value of the performance capability of described fuse.
Further, this performance parameter determining unit 140 may be used for the actual performance parameter determining described battery based on the health status of described fuse.
In one example, described performance parameter determining unit 140 can indicate described fuse in response to the health status of described fuse and not yet arrive and stop life time or just arrive described termination life time, according to described reality resistance to year intensity, describedly presets the first power capacity factor that resistance to year intensity and the first factor of safety determine described battery; And according to described first power capacity Summing Factor the nominal maximum permission throughput power of battery calculate when described fuse not yet arrives described termination life time or just arrives described termination life time, the maximum permission throughput power of reality of described battery, wherein, the reality of described battery maximum permission throughput power can be more than or equal to the maximum permission throughput power of nominal of described battery.
In one example, described performance parameter determining unit 140 can indicate described fuse in response to the health status of described fuse and not yet arrive and stop life time or just arrive described termination life time, according to described reality resistance to year intensity, describedly presets the second power capacity factor that resistance to year intensity and the second factor of safety determine described battery, and the nominal maximum permission time for described nominal maximum permission throughput power of battery calculates when described fuse not yet arrives described termination life time or just arrives described termination life time according to described second power capacity Summing Factor, of described battery, wherein, the reality maximum permission time for described reality maximum permission throughput power of described battery can be more than or equal to the nominal maximum permission time for described nominal maximum permission throughput power of described battery.
In one example, described performance parameter determining unit 140 can indicate described fuse in response to the health status of described fuse and just arrive and stop life time or exceeded described termination life time, according to described reality resistance to year intensity, describedly presets the 3rd power capacity factor that resistance to year intensity and the 3rd factor of safety determine described battery; And the nominal maximum permission throughput power of battery calculates when described fuse just arrives described termination life time or exceeded described termination life time according to described 3rd power capacity Summing Factor, the maximum permission throughput power of reality of described battery, wherein, the reality of described battery maximum permission throughput power can be less than or equal to the maximum permission throughput power of nominal of described battery.
In one example, described performance parameter determining unit 140 can indicate described fuse in response to the health status of described fuse and just arrive and stop life time or exceeded described termination life time, according to described reality resistance to year intensity, describedly presets the 4th power capacity factor that resistance to year intensity and the 4th factor of safety determine described battery, and the nominal maximum permission time for described nominal maximum permission throughput power of battery calculates when described fuse just arrives described termination life time or exceeded described termination life time according to described 4th power capacity Summing Factor, of described battery, wherein, the reality maximum permission time for described reality maximum permission throughput power of described battery can be less than or equal to the nominal maximum permission time for described nominal maximum permission throughput power of described battery.
Further, this performance parameter adjustment unit 150 may be used for the current performance adjusting described battery according to described actual performance parameter.
Concrete configuration according to the unit in the health status determining device 100 of the described battery fuse of the embodiment of the present application is introduced in detail with operation in the health status defining method of the battery fuse described above with reference to Fig. 3 and Fig. 4, and therefore, its repeated description will be omitted.
As can be seen here, adopt the device according to the health status of the fuse for determining battery of the embodiment of the present invention, the reality resistance to year intensity of described fuse can be calculated according to the current value flowing through battery fuse, and preset by more described reality resistance to year intensity and one health status that resistance to year intensity determines described fuse.Therefore, the present invention proposes the health status that a kind of device may be used for determining battery fuse, to change in time and fuse can be avoided to occur catastrophic failure due to overload work.
And then, adopting the device of the health status of the fuse for determining battery according to the embodiment of the present invention, reasonably can also determine the actual performance parameter of described battery according to the health status based on determined described fuse.Therefore, the present invention proposes a kind of device and reasonably can utilize battery, to ensure to make this battery carry out work with maximized performance, the situation of fuse overload work can not be caused again, thus obtain one more reasonably functional realiey mode.
Finally, the functional configuration block diagram of the battery management system according to the embodiment of the present invention is described with reference to Fig. 6.
Fig. 6 illustrates the battery management system according to the embodiment of the present invention.
The device of the health status of the method for the health status of the fuse for determining battery illustrated in Fig. 3 and the fuse for determining battery illustrated in Fig. 5 can be applied to the battery management system 10 illustrated in Fig. 6.
As illustrated in FIG. 6, described battery management system 10 can comprise: the health status determining device 100 of battery fuse and current sensor 200.
This current sensor 200 may be used for detecting the current value flowing through battery fuse.
The health status determining device 100 of this battery fuse may be used for detecting that current value calculates the reality resistance to year intensity of described fuse according to this current sensor 200, and presets by more described reality resistance to year intensity and one health status that resistance to year intensity determines described fuse.
Such as, this health status determining device 100 can be communicated with battery management system 10 by any mode.
In one example, this health status determining device 100 can be integrated in this battery management system 10 as a software module and/or hardware module, and in other words, this battery management system 10 can comprise this health status determining device 100.Such as, this health status determining device 100 can be the software module run in the control module of this battery management system 10, or can be aimed at its application program developed; Certainly, this health status determining device 100 can be one of numerous hardware modules of this battery management system 10 equally.
It should be noted that, be exemplarily illustrated although here the health status determining device 100 of this battery fuse is included in battery management system 10, the present invention is not limited thereto.In another example, this health status determining device 100 and this battery management system 10 also can be the equipment be separated, and this health status determining device 100 can be connected to this battery management system 10 by wired and/or wireless network, and transmit interactive information according to the data layout of agreement.
In addition, although above-mentioned unit is illustrated each embodiment of the present invention as the executive agent of each step herein, those skilled in the art are it is understood that the present invention is not limited thereto.The executive agent of each step can by other one or more units, unit even module serve as.
Such as, above-mentioned current value detecting unit 110, each step performed by resistance to year Strength co-mputation unit 120, health status determining unit 130, performance parameter determining unit 140 and performance parameter adjustment unit 150 can be realized by the controller in battery management system or CPU (central processing unit) (CPU) uniformly.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add required hardware platform by means of software and realize, and can certainly all be implemented by software or hardware.Based on such understanding, what technical scheme of the present invention contributed to background technology can embody with the form of software product in whole or in part, this computer software product can be stored in storage medium, as ROM/RAM, disk, CD etc., comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform the method described in some part of each embodiment of the present invention or embodiment.
Each embodiment of the present invention is described in detail above.But, it should be appreciated by those skilled in the art that when or not depart from principle of the present invention and spirit, various amendment can be carried out to these embodiments, combination or sub-portfolio, and such amendment should fall within the scope of the present invention.
Claims (20)
1. for determining a method for battery fuse health status, it is characterized in that, described method comprises:
Detect the current value flowing through described fuse;
Calculate the reality resistance to year intensity of described fuse according to described current value, described reality resistance to year intensity is for representing the actual electrical heat ageing degree of described fuse; And
The health status that resistance to year intensity determines described fuse is preset by more described reality resistance to year intensity and one.
2. method according to claim 1, is characterized in that, calculates the reality resistance to year intensity of described fuse, comprising according to described current value:
Square described reality resistance to year intensity is calculated relative to the integrated value of time by what calculate described current value.
3. method according to claim 1, is characterized in that, presets the health status that resistance to year intensity determines described fuse, comprising by more described reality resistance to year intensity and one:
The maximum permission parts resistance to year intensity of more described reality resistance to year intensity and described fuse;
Be greater than described reality resistance to year intensity in response to described maximum permission parts resistance to year intensity, judge that described fuse not yet arrives termination life time;
Equal described reality resistance to year intensity in response to described maximum permission parts resistance to year intensity, judge that described fuse just arrives described termination life time; And
Be less than described reality resistance to year intensity in response to described maximum permission parts resistance to year intensity, judge that described fuse has exceeded described termination life time.
4. method according to claim 3, is characterized in that, described maximum permission parts resistance to year intensity is associated with the termination life value of the performance capability of described fuse.
5. method according to claim 1, is characterized in that, described method also comprises:
Health status based on described fuse determines the actual performance parameter of described battery.
6. method according to claim 5, is characterized in that, the health status based on described fuse determines the actual performance parameter of described battery, comprising:
Health status in response to described fuse indicates described fuse and not yet arrives and stop life time or just arrive described termination life time, according to described reality resistance to year intensity, describedly presets the first power capacity factor that resistance to year intensity and the first factor of safety determine described battery; And
According to described first power capacity Summing Factor the nominal maximum permission throughput power of battery calculate when described fuse not yet arrives described termination life time or just arrives described termination life time, the maximum permission throughput power of reality of described battery,
Wherein, the reality of described battery maximum permission throughput power is more than or equal to the maximum permission throughput power of nominal of described battery.
7. method according to claim 6, is characterized in that, the health status based on described fuse determines the actual performance parameter of described battery, also comprises:
According to described reality resistance to year intensity, describedly preset the second power capacity factor that resistance to year intensity and the second factor of safety determine described battery; And
According to described second power capacity Summing Factor the nominal maximum permission time for described nominal maximum permission throughput power of battery calculate when described fuse not yet arrives described termination life time or just arrives described termination life time, reality maximum permission time for described reality maximum permission throughput power of described battery
Wherein, the reality maximum permission time for described reality maximum permission throughput power of described battery is more than or equal to the nominal maximum permission time for described nominal maximum permission throughput power of described battery.
8. method according to claim 5, is characterized in that, the health status based on described fuse determines the actual performance parameter of described battery, comprising:
Health status in response to described fuse indicates described fuse and just arrives and stop life time or exceeded described termination life time, according to described reality resistance to year intensity, describedly presets the 3rd power capacity factor that resistance to year intensity and the 3rd factor of safety determine described battery; And
According to described 3rd power capacity Summing Factor the nominal maximum permission throughput power of battery calculate when described fuse just arrives described termination life time or exceeded described termination life time, the maximum permission throughput power of reality of described battery,
Wherein, the reality of described battery maximum permission throughput power is less than or equal to the maximum permission throughput power of nominal of described battery.
9. method according to claim 8, is characterized in that, the health status based on described fuse determines the actual performance parameter of described battery, also comprises:
According to described reality resistance to year intensity, describedly preset the 4th power capacity factor that resistance to year intensity and the 4th factor of safety determine described battery; And
According to described 4th power capacity Summing Factor, the nominal maximum permission time for described nominal maximum permission throughput power of battery calculates when described fuse just arrives described termination life time or exceeded described termination life time, of described battery
Wherein, the reality maximum permission time for described reality maximum permission throughput power of described battery is less than or equal to the nominal maximum permission time for described nominal maximum permission throughput power of described battery.
10. method according to claim 5, is characterized in that, described method also comprises:
The current performance of described battery is adjusted according to described actual performance parameter.
11. 1 kinds, for determining the device of battery fuse health status, is characterized in that, described device comprises:
Current value detecting unit, for detecting the current value flowing through described fuse;
Resistance to year Strength co-mputation unit, for calculating the reality resistance to year intensity of described fuse according to described current value, described reality resistance to year intensity is for representing the actual electrical heat ageing degree of described fuse; And
Health status determining unit, for presetting by more described reality resistance to year intensity and one health status that resistance to year intensity determines described fuse.
12. devices according to claim 11, is characterized in that, described resistance to year Strength co-mputation unit square calculates described reality resistance to year intensity relative to the integrated value of time by what calculate described current value.
13. devices according to claim 11, is characterized in that, the maximum permission parts resistance to year intensity of the more described reality of described health status determining unit resistance to year intensity and described fuse; Be greater than described reality resistance to year intensity in response to described maximum permission parts resistance to year intensity, judge that described fuse not yet arrives termination life time; Equal described reality resistance to year intensity in response to described maximum permission parts resistance to year intensity, judge that described fuse just arrives described termination life time; And be less than described reality resistance to year intensity in response to described maximum permission parts resistance to year intensity, judge that described fuse has exceeded described termination life time.
14. devices according to claim 13, is characterized in that, described maximum permission parts resistance to year intensity is associated with the termination life value of the performance capability of described fuse.
15. devices according to claim 11, is characterized in that, described device also comprises:
Performance parameter determining unit, for determining the actual performance parameter of described battery based on the health status of described fuse.
16. devices according to claim 15, it is characterized in that, described performance parameter determining unit indicates described fuse in response to the health status of described fuse and not yet arrives and stop life time or just arrive described termination life time, according to described reality resistance to year intensity, describedly presets the first power capacity factor that resistance to year intensity and the first factor of safety determine described battery; And according to described first power capacity Summing Factor the nominal maximum permission throughput power of battery calculate when described fuse not yet arrives described termination life time or just arrives described termination life time, the maximum permission throughput power of reality of described battery
Wherein, the reality of described battery maximum permission throughput power is more than or equal to the maximum permission throughput power of nominal of described battery.
17. devices according to claim 16, is characterized in that, described performance parameter determining unit also according to described reality resistance to year intensity, describedly preset the second power capacity factor that resistance to year intensity and the second factor of safety determine described battery; And according to described second power capacity Summing Factor the nominal maximum permission time for described nominal maximum permission throughput power of battery calculate when described fuse not yet arrives described termination life time or just arrives described termination life time, reality maximum permission time for described reality maximum permission throughput power of described battery
Wherein, the reality maximum permission time for described reality maximum permission throughput power of described battery is more than or equal to the nominal maximum permission time for described nominal maximum permission throughput power of described battery.
18. devices according to claim 15, it is characterized in that, described performance parameter determining unit indicates described fuse in response to the health status of described fuse and just arrives and stop life time or exceeded described termination life time, according to described reality resistance to year intensity, describedly presets the 3rd power capacity factor that resistance to year intensity and the 3rd factor of safety determine described battery; And according to described 3rd power capacity Summing Factor the nominal maximum permission throughput power of battery calculate when described fuse just arrives described termination life time or exceeded described termination life time, the maximum permission throughput power of reality of described battery
Wherein, the reality of described battery maximum permission throughput power is less than or equal to the maximum permission throughput power of nominal of described battery.
19. devices according to claim 18, is characterized in that, described performance parameter determining unit also according to described reality resistance to year intensity, describedly preset the 4th power capacity factor that resistance to year intensity and the 4th factor of safety determine described battery; And the nominal maximum permission time for described nominal maximum permission throughput power of battery calculates when described fuse just arrives described termination life time or exceeded described termination life time according to described 4th power capacity Summing Factor, of described battery
Wherein, the reality maximum permission time for described reality maximum permission throughput power of described battery is less than or equal to the nominal maximum permission time for described nominal maximum permission throughput power of described battery.
20. devices according to claim 15, is characterized in that, described method also comprises:
Performance parameter adjustment unit, for adjusting the current performance of described battery according to described actual performance parameter.
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| CN201510141349.1A CN104749527A (en) | 2015-03-27 | 2015-03-27 | Method and device used for determining health condition of battery fuse |
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| CN201510141349.1A CN104749527A (en) | 2015-03-27 | 2015-03-27 | Method and device used for determining health condition of battery fuse |
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