CN106093798A - The detection method of a kind of lithium battery load capacity and device - Google Patents
The detection method of a kind of lithium battery load capacity and device Download PDFInfo
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- CN106093798A CN106093798A CN201610698734.0A CN201610698734A CN106093798A CN 106093798 A CN106093798 A CN 106093798A CN 201610698734 A CN201610698734 A CN 201610698734A CN 106093798 A CN106093798 A CN 106093798A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/3644—Constructional arrangements
- G01R31/3647—Constructional arrangements for determining the ability of a battery to perform a critical function, e.g. cranking
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Abstract
The invention discloses a kind of lithium battery load capacity detection method, including: under multiple output electric current, gather the internal resistance pressure drop of the lithium battery with different loads ability respectively；Wherein, the load capacity of this lithium battery is known；Detection and control module are implanted in the internal resistance pressure drop gathered during different output current and corresponding load capacity；Detection and control module detect the internal resistance pressure drop of lithium battery to be measured；Relatively the internal resistance pressure drop of lithium battery to be measured and the internal resistance pressure drop of the lithium battery of known load ability are to obtain the load capacity of lithium battery to be measured.By technical scheme, make electronic product can control its operating power in the range of the load capacity of lithium battery.
Description
Technical field
The present invention relates to electronic technology, particularly relate to detection method and the device of a kind of lithium battery load capacity.
Background technology
A lot of portable electronic products all use the mode of replaceable battery by battery to provide electric energy, but, different lithiums
The load capacity of battery also differs, and the especially load capacity of the conventional lithium battery in market is uneven.
If loading the lithium battery that load capacity is relatively low in electronic product, when the operating power of electronic product exceedes lithium battery
Load capacity time, electronic product cisco unity malfunction can be caused or cause lithium battery persistent fever high temperature failure so that
When using this electronic product, this lithium battery can produce great potential safety hazard.
In order to solve the problems referred to above, some product design special reserve battery chamber structure and reserve battery, limit
User uses the conventional lithium battery on market.But in order to reach to limit the purpose of use conventional batteries, customize special battery
Chamber structure and battery can cause the manufacture difficulty of product to increase, and its manufacturing cost is also substantially improved, and causes product not simultaneously
Conventional lithium battery on the compatible market of energy so that product obtains the approach of electric energy and greatly reduces, and uses product to cause pole to user
Big inconvenience.
Technical scheme can be prevented effectively from electronic product use lithium battery as power supply time, because of lithium battery
When output exceedes its load capacity, the electric energy output caused is terminated or battery last heating high temperature failure by force, even
The great dangerous risk burnt.
Summary of the invention
In order to solve the problems referred to above, the invention provides a kind of method with detection of electrons to detect the load energy of lithium battery
The method and device of power, can allow electronic product originally possess inspection on the basis of not designing by special reserve battery chamber structure
Survey the function of cell load ability, so that electronic product can control operating power within the load capacity scope of battery.
In order to achieve the above object, as it is shown in figure 1, the present invention provides a kind of cell load ability detection method, the method
Including:
Under multiple output electric current, gather the internal resistance pressure drop of the lithium battery with different loads ability respectively；Wherein, this lithium
The load capacity of battery is known；
Described internal resistance pressure drop is implanted detection and control module with corresponding load capacity；
Described detection and control module detect the internal resistance pressure drop of lithium battery to be measured；
Compare the internal resistance pressure drop of the internal resistance pressure drop of lithium battery to be measured and the lithium battery of known load ability；
Obtain the load capacity of described lithium battery to be measured.
Preferably, the step of the internal resistance pressure drop that detection and control module detect lithium battery to be measured at least includes:
With the lithium battery output electric current of known load ability when gathering the internal resistance pressure drop of lithium battery of known load ability
Under identical electric current, gather the internal resistance pressure drop of described lithium battery to be measured respectively.
Preferably, load blocks is controlled to obtain to be measured for closed mode, detection and control module by detection and control module
The output voltage U of lithium battery end0；
Load blocks controls as duty by detection and control module, with the lithium battery gathering known load ability
Under the electric current that during internal resistance pressure drop, the lithium battery output electric current of known load ability is identical, detect the output voltage of mesuring battary respectively
U1；
According to U0Deduct U1, obtain the internal resistance pressure drop of lithium battery to be measured.
Preferably, if the internal resistance pressure drop of described lithium battery to be measured is equal to the internal resistance of the lithium battery of described known load ability
Pressure drop, the load capacity of the most described lithium battery to be measured is equal to the load capacity of the lithium battery of described known load ability；
If the internal resistance pressure drop of described lithium battery to be measured is less than the internal resistance pressure drop of the lithium battery of described known load ability, then
The load capacity of described lithium battery to be measured is more than the load capacity of the lithium battery of described known load ability；
If the internal resistance pressure drop of described lithium battery to be measured is more than the internal resistance pressure drop of the lithium battery of described known load ability, then
The load capacity of described lithium battery to be measured is less than the load capacity of the lithium battery of described known load ability；
Present invention also offers a kind of lithium battery load capacity detection device, as in figure 2 it is shown, this device includes loading mould
Block, detection and control module, mesuring battary module, wherein,
Described detection and control module are used for, by internal resistance pressure drop and the corresponding load of described known load ability lithium battery
Ability is stored in the processor chips of described detection and control module；
Described detection and control device are additionally operable to, and by described load blocks, detect the interior of described lithium battery module to be measured
Damping drops；Compare the internal resistance pressure drop of the internal resistance pressure drop of described lithium battery to be measured and the lithium battery of known load ability, to obtain
State the load capacity of lithium battery to be measured.
Preferably, by load blocks, the step of the internal resistance pressure drop detecting lithium battery module to be measured at least includes:
With the lithium battery output electric current of known load ability when gathering the internal resistance pressure drop of lithium battery of known load ability
Under identical electric current, gather the internal resistance pressure drop of described lithium battery to be measured respectively.
Preferably, load blocks is controlled to obtain to be measured for closed mode, detection and control module by detection and control module
The output voltage U of lithium battery end0；
Load blocks controls as duty by detection and control module, with the lithium battery gathering known load ability
Under the electric current that during internal resistance pressure drop, the lithium battery output electric current of known load ability is identical, detect the output voltage of mesuring battary respectively
U1；
According to U0Deduct U1, obtain the internal resistance pressure drop of lithium battery to be measured.
Preferably, also include:
If the internal resistance pressure drop of described lithium battery to be measured is equal to the internal resistance pressure drop of the lithium battery of described known load ability, then
The load capacity of described lithium battery to be measured is equal to the load capacity of the lithium battery of described known load ability；
If the internal resistance pressure drop of described lithium battery to be measured is less than the internal resistance pressure drop of the lithium battery of described known load ability, then
The load capacity of described lithium battery to be measured is more than the load capacity of the lithium battery of described known load ability；
If the internal resistance pressure drop of described lithium battery to be measured is more than the internal resistance pressure drop of the lithium battery of described known load ability, then
The load capacity of described lithium battery to be measured is less than the load capacity of the lithium battery of described known load ability；
Preferably, lithium battery module to be measured is single battery core lithium battery, many battery cores parallel connection lithium battery group, many battery cores series connection lithium electricity
One in Chi Zuhe many battery cores connection in series-parallel lithium battery group.
Technical scheme provides a kind of method with detection of electrons to detect the dress of the load capacity of lithium battery
Put, electronic product can be allowed originally to possess detection lithium battery load on the basis of not designing by special reserve battery chamber structure
The function of ability, so that electronic product can control operating power within the load capacity scope of lithium battery, it is possible to
On the basis of safe and reliable, compatible market major part routine lithium battery is as energy source, and battery compartment and electric power-feeding structure are significantly simultaneously
Degree reduces or simplifies, so that the manufacture difficulty of product and cost also decline to a great extent.
Accompanying drawing explanation
Illustrating the accompanying drawing in the embodiment of the present invention below, the accompanying drawing in embodiment is for the present invention is entered one
Step understands, is used for explaining the present invention, is not intended that limiting the scope of the invention together with description.
Fig. 1 is the schematic diagram of the lithium battery load capacity detection method of the present invention；
Fig. 2 is the block diagram of the lithium battery load capacity detection device of the present invention；
Fig. 3 is the schematic diagram of the load capacity detection device of the lithium battery of the present invention；
Fig. 4 is the schematic equivalent circuit of the lithium battery of the present invention；
Fig. 5 is the schematic diagram of the equivalent circuit during lithium battery bringing onto load of the present invention；
Fig. 6 is the schematic diagram of the lithium battery of the present invention；
Fig. 7 is the schematic diagram of the load circuit of the present invention, and it includes LED and LED drive circuit；
Fig. 8 is detection and the schematic diagram of control circuit of the present invention.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further referring to the drawings.
Detailed description of the invention
For the ease of the understanding of those skilled in the art, the invention will be further described below in conjunction with the accompanying drawings, not
Can be used for limiting the scope of the invention.It should be noted that in the case of not conflicting, the embodiment in the application and reality
The various modes executed in example can be mutually combined.
Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The mobile terminal realizing each embodiment of the present invention is described referring now to accompanying drawing.In follow-up description, use
For representing the suffix explanation only for the beneficially present invention of such as " module ", " parts " or " unit " of element, itself
Not specific meaning.Therefore, " module " can mixedly use with " parts ".
Technical scheme provides a kind of circuit to detect the method and device of lithium battery load capacity, and it is total
Inventive concept be:
Technical scheme uses and directly or indirectly records known load ability WLLithium battery difference output electricity
The mode of internal resistance pressure drop Ur during stream, indirectly records the internal resistance r of the lithium battery of different loads ability, and internal resistance r is electric with lithium
Pond load capacity WLCorresponding relation, and set up internal resistance pressure drop Ur and lithium battery load capacity WLThe data model of corresponding relation.
And, technical scheme uses and directly or indirectly records unknown load capacity WLLithium battery, in different output current
Time internal resistance pressure drop Ur1Mode, indirectly record the internal resistance r of the battery of different loads ability, simultaneously with the interior damping recorded
Fall Ur1With above-mentioned internal resistance pressure drop Ur and lithium battery load capacity WLThe data model of corresponding relation contrast, thus obtain
Obtain lithium battery load capacity WLConcrete numerical value or scope.
Fig. 3 is the block diagram of the lithium battery load capacity detection device of the present invention.Wherein this lithium battery can be single battery core lithium
Battery, it is also possible to be many battery cores lithium battery group.Lithium battery is for providing electric energy to control circuit and load.Detection and control circuit
For voltage and other control signal of reception of responsible detection lithium battery end, it also is responsible for controlling the operating power of load simultaneously.Negative
Carry the main consumer that circuit is lithium battery electric energy.
Fig. 4 is the schematic equivalent circuit of battery, and wherein, r is battery equivalent internal resistance, and battery can be equivalent to desired voltage
Connect with a resistance r in source.
Fig. 5 is the schematic diagram of the equivalent circuit during lithium battery bringing onto load of the present invention.As it is shown in figure 5, in r is battery equivalence
Resistance；Ur represents the voltage at battery equivalent internal resistance r two ends, the battery pressure drop that i.e. battery equivalent internal resistance causes, referred to as internal resistance pressure drop；
Uoc represents voltage source voltage or battery open circuit voltage；RLFor circuit load, ULRepresent load both end voltage, i.e. battery bringing onto load work
The voltage at battery two ends when making, referred to as band carry voltage；The electric current in I indication circuit loop.Fig. 6 is showing of the lithium battery of the present invention
Being intended to, this lithium battery provides electric energy for detection and control circuit and load circuit.Fig. 7 is the signal of the load circuit of the present invention
Figure, it includes LED and LED drive circuit.Fig. 8 is detection and the schematic diagram of control circuit of the present invention, and wherein element IC2 is steady
Depressor, provides stable power supply for IC4 (MCU controller), and IC4 is miniature CPU, can detect cell voltage and control load electricity
The operating power on road.Preferably, in Fig. 6, lithium battery can be single battery core lithium battery, it is also possible to be many battery cores lithium battery group.Preferably
Ground, the load circuit in Fig. 7 can be other controllable-load circuit, i.e. can be operated the electronic load that state controls.Excellent
Selection of land, the Current Controller circuit in Fig. 8 can be that other has the circuit of voltage detecting function and data operation and control ability
System.
By Fig. 5 can obtain equation below 1:
Uoc=Ur+UL=Ir+IRL (1)
When electric current I be zero or the least time, it is believed that the voltage at battery two ends be equal to Uoc,
By formula (1) Uoc=Ur+UL=Ir+IRLDeformation can obtain formula 2:
Ur=Ir=Uoc-UL=Uoc-IRL (2)
Or by formula (1) Uoc=Ur+UL=Ir+IRLDeformation can obtain formula 3:
R=Ur/I (3)
According to the actual test to lithium battery, internal resistance r is the least for lithium battery, the maximum Safety output power W of lithium batteryL
The biggest, i.e. load capacity is the strongest；Otherwise, internal resistance of cell r is the biggest, and the load capacity of lithium battery is the least.
So, obtaining lithium battery internal resistance r as long as measuring, closing in conjunction with lithium battery internal resistance r is corresponding with lithium battery load capacity
The actual test data of system are it is known that the load capacity size of lithium battery.
From formula 3:r=Ur/I, if Ur and electric current I can be recorded just can indirectly calculate internal resistance of cell r.
By formula 2:Ur=Ir=Uoc-UL=Uoc-IRLUnderstand, only need to record Uoc and UL, Ur can be calculated.
Electric current I can be by controlling load RLOperating power control and set, so without detecting again.
Being deformed to obtain Ur=Ir, electric current I mono-timing from formula 3:r=Ur/I, Ur and r is proportional, so also may be used
Indirectly to record the load capacity of lithium battery by recording Ur.
Embodiment one
The invention provides one utilizes circuit to detect, the method for the load capacity of lithium battery in product.Use directly
Or indirectly record unknown load capacity WLLithium battery, the internal resistance pressure drop Ur when different output current1Mode, indirectly survey
Obtain the internal resistance r of the lithium battery of different loads ability, simultaneously with the internal resistance pressure drop Ur recorded1With above-mentioned internal resistance pressure drop Ur and lithium battery
Load capacity WLThe data model of corresponding relation contrast, thus indirectly obtain lithium battery load capacity WLConcrete numerical value
Or scope.
The first step, tests and gathers different loads ability WLThe internal resistance corresponding under different output current I of lithium battery
The data of pressure drop Ur.
1, test load ability is WL1Lithium battery BAT1, obtain this lithium battery BAT1 under different output current I relatively
The internal resistance pressure drop Ur answered.
1. the open-circuit voltage of test lithium battery BAT1 is Uoc1；Preferably, the floating voltage of this lithium battery can also be lithium
The voltage that battery records when less output；
2. the two ends cut-in operation power at lithium battery BAT1 is W1Load, allow lithium battery BAT1 with I1Output electric current
Electric discharge, after short period T, tests and records lithium battery both end voltage U11, by formula Ur11=Uoc1-U11Calculate internal resistance pressure drop
Ur11And record；
3. it is W by the two ends cut-in operation power of lithium battery BAT12Load, allow lithium battery BAT1 with I2Output electric current
Electric discharge, after short period T, tests and records battery both end voltage U12, by formula Ur12=Uoc1-U12Calculate internal resistance pressure drop
Ur12And record；
4. it is W by the two ends cut-in operation power of lithium battery BAT13Load, allow lithium battery BAT1 with I3Output electric current
Electric discharge, after short period T, tests and records battery both end voltage U13, by formula Ur13=Uoc1-U13Calculate internal resistance pressure drop
Ur13And record；
The most as required, can the like measure Ur14、Ur15、Ur16... and record (the data set of Ur to be tested
Number can determine according to the actual requirements, one group, two or more sets).
2, test load ability is WL2Lithium battery BAT2, obtain this lithium battery BAT2 under different output current I relatively
The internal resistance pressure drop Ur answered.
1. the open-circuit voltage of test lithium battery BAT2 is Uoc2；
2. the two ends cut-in operation power at lithium battery BAT2 is W1Load, allow lithium battery BAT2 with I1Output electric current
Electric discharge, after short period T, tests and records battery both end voltage U21, by formula Ur21=Uoc2–U21Calculate internal resistance pressure drop U21
And record；
3. it is W by the two ends cut-in operation power of lithium battery BAT22Load, allow lithium battery BAT2 with I2Output electric current
Electric discharge, after short period T, tests and records battery both end voltage U22, by formula Ur22=Uoc2-U22Calculate internal resistance pressure drop
Ur22And record；
4. it is W by the two ends cut-in operation power of lithium battery BAT23Load, allow lithium battery BAT2 with I3Output electric current
Electric discharge, after short period T, tests and records battery both end voltage U23, by formula Ur23=Uoc2–U23Calculate internal resistance pressure drop
Ur23And record；
The most as required, can the like measure Ur24、Ur25、Ur26... and record (the data set of Ur to be tested
Number can determine according to the actual requirements, one group, two or more sets)；
3, the like can be with test load ability as WL3、WL4、WL5... lithium battery BAT3, BAT4, BAT5 ...,
And record data internal resistance pressure drop Ur31、Ur32、Ur33..., Ur41、Ur42、Ur43..., Ur51、Ur52、Ur53... ...；
4, W is assumedL1>WL2>WL3>WL4> ..., then Ur11<Ur21<Ur31<Ur41<……,Ur12<Ur22<Ur32<Ur42
< ..., Ur13<Ur23<Ur33<Ur43< ... ...；
5, by above-mentioned test different loads ability W that gathersLLithium battery corresponding under different output current I in
The damping fall data compilation of Ur also implants the microprocessor chip of detection and control circuit.
Second step, the exemplary circuit used by technical scheme, such as Fig. 3, detects unknown load capacity
The internal resistance pressure drop Ur of lithium battery.
1, by the unknown load capacity WLXLithium battery BATx access the exemplary means that used of technical scheme
In, such as Fig. 3；
2, wherein load circuit is controlled to be closed mode by detection and control circuit, if now accessing the load of lithium battery end
Power is W0, the output electric current of lithium battery is I0, now detection and control circuit record the output voltage of battery-end is U0, because
W0Sufficiently small, it is possible to think U0Approximate battery open circuit voltage Uoc；
3, completing above-mentioned 1 step and after short period T, load circuit is controlled as power by detection and control circuit
W1Duty, now the output electric current of lithium battery end is I1, now detection and control circuit record the output voltage of battery-end
For U1；
4, by formula Ur1=U0-U1Calculate the internal resistance pressure drop Ur of battery1。
5, repeat step 3 and 4, and adjust the power of load circuit by detection and control circuit, make the output electric current of battery
For I2、I3、I4... duty, i.e. can record this battery in different output current is I2、I3、I4Interior damping under ...
Fall Ur2、Ur3、Ur4... (preferably, the data set number of Ur to be tested can determine according to the actual requirements, one group, two groups or
Many groups).
3rd step, the Ur data obtained with above-mentioned second step and the first step are obtained and the data of implantable miniature processor are made
Relatively:
If Ur1=Ur11, then WLX=WL1, i.e. the load capacity phase of the load capacity of lithium battery BATx and lithium battery BAT1
Deng；
If Ur1<Ur11, then WLX>WL1, i.e. the load capacity of the lithium battery BATx load capacity more than lithium battery BAT1；
If Ur11<Ur1<Ur21, then WL1>WLX>WL2, i.e. the load capacity of lithium battery BATx bearing between lithium battery BAT2
Between the load capacity of loading capability and lithium battery BAT1；
In like manner:
If Ur2=Ur32, then WLX=WL3, i.e. the load capacity phase of the load capacity of lithium battery BATx and lithium battery BAT3
Deng；
If Ur2<Ur32, then WLX>WL3, i.e. the load capacity of the lithium battery BATx load capacity more than lithium battery BAT3；
If Ur32<Ur2<Ur12, then WL3>WLX>WL1, i.e. the load capacity of lithium battery BATx bearing between lithium battery BAT3
Between the load capacity of loading capability and lithium battery BAT1；
In like manner, Ur is worked as2=Ur22, Ur3<Ur13... etc. situation can be carried out comparing, thus obtain lithium battery BATx's
Concrete load capacity or load capacity scope substantially.
Technical scheme uses the directly or indirectly test lithium battery internal resistance pressure drop Ur when different output current
Mode, indirectly record internal resistance value or the internal resistance scope of different loads ability lithium battery, thus by cell load ability and electricity
Concrete relation is set up in pond internal resistance pressure drop, so being not limited to this to send out concrete detection mode described, by formula 2:Ur=Ir=Uoc-
The detection of other conversion gained of UL=Uoc-IRL or formula 3:r=Ur/I and method of testing are all in protection scope of the present invention
In.
Embodiment two:
Technical scheme provides a kind of method with detection of electrons to the method detecting the load capacity of battery,
Electronic product can be allowed originally to possess detection cell load ability by special reserve battery chamber structure on the basis of not designing
Function so that electronic product can control operating power within the load capacity scope of battery.
In order to achieve the above object, the invention provides a kind of lithium battery load capacity detection method, the method includes:
Under multiple output electric current, gather the internal resistance pressure drop of the lithium battery with different loads ability respectively；Wherein, this lithium
The load capacity of battery is known；
Described internal resistance pressure drop is implanted detection and control module with corresponding load capacity；
Detection and control module detect the internal resistance pressure drop of lithium battery to be measured；Preferably, detection and control module detection are to be measured
The step of the pressure drop of battery at least includes: with known load ability when gathering the internal resistance pressure drop of lithium battery of known load ability
The lithium battery output identical electric current of electric current under, gather the internal resistance pressure drop of described lithium battery to be measured respectively.
Compare the internal resistance pressure drop of the internal resistance pressure drop of lithium battery to be measured and the lithium battery of known load ability；
By the internal resistance pressure drop of the internal resistance pressure drop of relatively lithium battery to be measured with the lithium battery of known load ability, to obtain
State the load capacity of lithium battery to be measured.
Preferably, load blocks is controlled to obtain for closed mode, described detection and control module by detection and control module
The output voltage U of lithium battery end to be measured0；Load blocks is controlled to be duty by detection and control module, known with collection
Under the electric current that during the internal resistance pressure drop of the lithium battery of load capacity, the lithium battery output electric current of known load ability is identical, detect to be measured
The output voltage U of lithium battery1；According to U0Deduct U1, obtain the internal resistance pressure drop of described lithium battery to be measured.If described lithium to be measured is electric
The internal resistance pressure drop in pond is equal to the internal resistance pressure drop of the lithium battery of described known load ability, the load capacity of the most described lithium battery to be measured
Load capacity equal to the lithium battery of described known load ability；If the internal resistance pressure drop of described lithium battery to be measured less than described
Knowing the internal resistance pressure drop of the lithium battery of load capacity, the load capacity of the most described lithium battery to be measured is more than described known load ability
The load capacity of lithium battery；If the internal resistance pressure drop of described lithium battery to be measured is interior more than the lithium battery of described known load ability
Damping drops, and the load capacity of the most described lithium battery to be measured is less than the load capacity of the lithium battery of described known load ability；
Such as, under multiple output electric current I, gather the data of the internal resistance pressure drop Ur of the lithium battery of known load ability.1)
It is W in known load abilityL5Lithium battery in, gather this lithium battery BAT5 interior damping corresponding under different output current I
Fall Ur5.2) it is W in known load abilityL6Lithium battery in, gather this lithium battery BAT6 corresponding under different output current I
Internal resistance pressure drop Ur6.3) the like can test the lithium battery of other load capacity, and record its internal resistance pressure drop.4) by upper
State test and the internal resistance pressure drop corresponding under different output current I of the lithium battery of different loads ability that gathers is born with corresponding
The data compilation of loading capability also implants the microprocessor chip of detection and control circuit.
As shown in Figure 3 and Figure 5, detection and control module, in detection product, e.g., pocket lamp, head lamp, dynamo lighting set are utilized
In the internal resistance pressure drop of battery.
In the product that will be detected, the internal resistance pressure drop Ur of battery and the first step are obtained and the data of implantable miniature processor
Make comparisons: if the internal resistance pressure drop of described lithium battery to be measured is equal to the internal resistance pressure drop of the lithium battery of described known load ability, then
The load capacity of described lithium battery to be measured is equal to the load capacity of the lithium battery of described known load ability；If described lithium to be measured
The internal resistance pressure drop of battery is less than the internal resistance pressure drop of the lithium battery of described known load ability, the load energy of the most described lithium battery to be measured
Power is more than the load capacity of the lithium battery of described known load ability；If the internal resistance pressure drop of described lithium battery to be measured is more than described
The internal resistance pressure drop of the lithium battery of known load ability, the load capacity of the most described lithium battery to be measured is less than described known load ability
The load capacity of lithium battery.By comparing, thus obtain load capacity occurrence or the scope of lithium battery in product.
Embodiment three:
Technical scheme additionally provides a kind of method with detection of electrons to detect the load capacity of lithium battery
Device, can allow electronic product originally possess detection cell load on the basis of not designing by special reserve battery chamber structure
The function of ability, so that electronic product can control operating power within the load capacity scope of battery, it is possible in peace
On the basis of the most reliably, compatible market major part routine lithium battery is as energy source, and battery compartment and electric power-feeding structure are significantly simultaneously
Reduce or simplify, so that the manufacture difficulty of product and cost also decline to a great extent.
Present invention also offers a kind of cell load energy force checking device, this device includes load blocks, detects and controls
Module, mesuring battary module, wherein,
Detection and control module are used for, and under multiple output electric current, gather the lithium battery with different loads ability respectively
Internal resistance pressure drop, and internal resistance pressure drop and corresponding load capacity are implanted in the processor chips of detection and control module；Wherein,
The load capacity of this battery is known；
Detection and control device are additionally operable to, and by load blocks, detect the internal resistance pressure drop of lithium battery module to be measured；Relatively treat
Survey the internal resistance pressure drop of the internal resistance pressure drop of lithium battery and the lithium battery of known load ability, to obtain the load energy of lithium battery to be measured
Power.
Preferably, by load blocks, the step of the internal resistance pressure drop detecting lithium battery module to be measured at least includes: with adopt
Under the electric current that during the internal resistance pressure drop of lithium battery of collection known load ability, the lithium battery output electric current of known load ability is identical, point
Do not gather the internal resistance pressure drop of described lithium battery to be measured.
Preferably, load blocks is controlled to obtain to be measured for closed mode, detection and control module by detection and control module
The output voltage U of lithium battery end0；Load blocks is controlled as duty by detection and control module, with gather known load
Under the electric current that during the internal resistance pressure drop of the lithium battery of ability, the lithium battery output electric current of known load ability is identical, detect to be measured respectively
The output voltage U of battery1；According to U0Deduct U1, obtain the internal resistance pressure drop of lithium battery to be measured.
If the internal resistance pressure drop of described lithium battery to be measured is equal to the internal resistance pressure drop of the lithium battery of described known load ability, then
The load capacity of described lithium battery to be measured is equal to the load capacity of the lithium battery of described known load ability；If described lithium to be measured
The internal resistance pressure drop of battery is less than the internal resistance pressure drop of the lithium battery of described known load ability, the load energy of the most described lithium battery to be measured
Power is more than the load capacity of the lithium battery of described known load ability；If the internal resistance pressure drop of described lithium battery to be measured is more than described
The internal resistance pressure drop of the lithium battery of known load ability, the load capacity of the most described lithium battery to be measured is less than described known load ability
The load capacity of lithium battery.
Preferably, lithium battery module to be measured is single battery core lithium battery, many battery cores parallel connection lithium battery group, many battery cores series connection lithium electricity
One in Chi Zuhe many battery cores connection in series-parallel lithium battery group.
The lithium battery detection method of the present invention and device can apply to, but are not limited to, electric torch circuit, head lamp circuit,
Dynamo lighting set circuit, camp lamp circuit, Diaoyu Island circuit, searchlight circuit, mancarried electronic aid etc..
It should be noted that in this article, term " includes ", " comprising " or its any other variant are intended to non-row
Comprising of his property, so that include that the process of a series of key element, method, article or device not only include those key elements, and
And also include other key elements being not expressly set out, or also include intrinsic for this process, method, article or device
Key element.In the case of there is no more restriction, statement " including ... " key element limited, it is not excluded that including this
The process of key element, method, article or device there is also other identical element.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
Through the above description of the embodiments, those skilled in the art is it can be understood that arrive above-described embodiment side
Method can add the mode of required general hardware platform by software and realize, naturally it is also possible to by hardware, but a lot of in the case of
The former is more preferably embodiment.Based on such understanding, prior art is done by technical scheme the most in other words
The part going out contribution can embody with the form of software product, and this computer software product is stored in a storage medium
In (such as ROM/RAM, magnetic disc, CD), including some instructions with so that a station terminal equipment (can be mobile phone, computer, take
Business device, air-conditioner, or the network equipment, miniature CPU etc.) perform the method described in each embodiment of the present invention.
These are only the preferred embodiments of the present invention, not thereby limit the scope of the claims of the present invention, every utilize this
Equivalent structure or equivalence flow process that bright description and accompanying drawing content are made convert, or are directly or indirectly used in other relevant skills
Art field, is the most in like manner included in the scope of patent protection of the present invention.
Claims (9)
1. a cell load ability detection method, it is characterised in that
Under multiple output electric current, gather the internal resistance pressure drop of the lithium battery with different loads ability respectively；Wherein, this lithium battery
Load capacity be known；
Described internal resistance pressure drop is implanted detection and control module with corresponding load capacity；
Described detection and control module detect the internal resistance pressure drop of lithium battery to be measured；
Compare the internal resistance pressure drop of the internal resistance pressure drop of lithium battery to be measured and the lithium battery of known load ability；
Obtain the load capacity of described lithium battery to be measured.
Method the most according to claim 1, it is characterised in that described detection and control module detect the interior of lithium battery to be measured
The step of damping fall at least includes:
When with the internal resistance pressure drop of the lithium battery gathering known load ability, the lithium battery output electric current of known load ability is identical
Electric current under, gather the internal resistance pressure drop of described lithium battery to be measured respectively.
Method the most according to claim 2, it is characterised in that:
Load blocks is controlled to obtain lithium to be measured electricity for closed mode, described detection and control module by described detection and control module
The output voltage U of Chi Duan0；
Load blocks is controlled to be duty by detection and control module, in the internal resistance with the lithium battery gathering known load ability
Under the electric current that during pressure drop, the lithium battery output electric current of known load ability is identical, detect the output voltage U of lithium battery to be measured1；
According to U0Deduct U1, obtain the internal resistance pressure drop of described lithium battery to be measured.
Method the most according to claim 3, also includes:
If the internal resistance pressure drop of described lithium battery to be measured is equal to the internal resistance pressure drop of the lithium battery of described known load ability, then described
The load capacity of lithium battery to be measured is equal to the load capacity of the lithium battery of described known load ability；
If the internal resistance pressure drop of described lithium battery to be measured is less than the internal resistance pressure drop of the lithium battery of described known load ability, then described
The load capacity of lithium battery to be measured is more than the load capacity of the lithium battery of described known load ability；
If the internal resistance pressure drop of described lithium battery to be measured is more than the internal resistance pressure drop of the lithium battery of described known load ability, then described
The load capacity of lithium battery to be measured is less than the load capacity of the lithium battery of described known load ability.
5. a lithium battery load capacity detection device, it is characterised in that include load blocks, detect and control module, to be measured
Lithium battery module, wherein,
Described detection and control module are used for, by internal resistance pressure drop and the corresponding load capacity of described known load ability lithium battery
It is stored in the processor chips of described detection and control module；
Described detection and control device are additionally operable to, and by described load blocks, detect the interior damping of described lithium battery module to be measured
Fall；Relatively the internal resistance pressure drop of described lithium battery to be measured and the internal resistance pressure drop of the lithium battery of known load ability, treat described in obtaining
Survey the load capacity of lithium battery.
Device the most according to claim 5, it is characterised in that by described load blocks, detects described lithium battery to be measured
The step of the pressure drop of module at least includes:
When with the internal resistance pressure drop of the lithium battery gathering known load ability, the lithium battery output electric current of known load ability is identical
Electric current under, gather the internal resistance pressure drop of described lithium battery to be measured respectively.
Device the most according to claim 6, it is characterised in that:
Described load blocks is controlled to obtain to be measured for closed mode, described detection and control module by described detection and control module
The output voltage U of lithium battery end0；
Described load blocks is controlled to be duty by described detection and control module, electric with the lithium gathering known load ability
Under the electric current that during the internal resistance pressure drop in pond, the lithium battery output electric current of known load ability is identical, detect the output of mesuring battary respectively
Voltage U1；
According to U0Deduct U1, obtain the described internal resistance pressure drop of described lithium battery to be measured.
Device the most according to claim 5, also includes:
If the internal resistance pressure drop of described lithium battery to be measured is equal to the internal resistance pressure drop of the lithium battery of described known load ability, then described
The load capacity of lithium battery to be measured is equal to the load capacity of the lithium battery of described known load ability；
If the internal resistance pressure drop of described lithium battery to be measured is less than the internal resistance pressure drop of the lithium battery of described known load ability, then described
The load capacity of lithium battery to be measured is more than the load capacity of the lithium battery of described known load ability；
If the internal resistance pressure drop of described lithium battery to be measured is more than the internal resistance pressure drop of the lithium battery of described known load ability, then described
The load capacity of lithium battery to be measured is less than the load capacity of the lithium battery of described known load ability.
9. according to the device according to any one of claim 5-8, it is characterised in that:
Described lithium battery module to be measured be single battery core lithium battery, many battery cores parallel connection lithium battery group, many battery cores serial lithium battery group and
One in many battery cores connection in series-parallel lithium battery group.
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| CN106093798B (en) | 2019-09-10 |
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