CN108508376A - A kind of lithium battery uses the determination method, apparatus and system of duration - Google Patents
A kind of lithium battery uses the determination method, apparatus and system of duration Download PDFInfo
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- CN108508376A CN108508376A CN201810523879.6A CN201810523879A CN108508376A CN 108508376 A CN108508376 A CN 108508376A CN 201810523879 A CN201810523879 A CN 201810523879A CN 108508376 A CN108508376 A CN 108508376A
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Abstract
The present invention provides the determination method, apparatus and system that a kind of lithium battery uses duration, is related to lithium battery technical field of measurement and test, the method includes：Obtain the internal resistance for presetting the lithium battery in environment temperature when N encloses electric discharge, wherein integers different N at least two；Internal resistance when discharging is enclosed in N according to the lithium battery, determines the relationship of the internal resistance and the electric discharge number of turns of the lithium battery；According to the relationship of the internal resistance and the electric discharge number of turns, the usable duration of the lithium battery is determined.The solution of the present invention realizes the prediction in the service life as lithium battery central characteristics, and lithium battery is avoided to cause to seriously affect to the use for responding product, is convenient for popularization and application of the lithium battery as energy source and power.
Description
Technical field
The invention belongs to lithium battery technical field of measurement and test, more particularly, to a kind of lithium battery using duration determination method,
Apparatus and system.
Background technology
Lithium ion lithium battery has been widely applied to mobile phone, laptop as a kind of serondary lithium battery
Etc. in consumer mobile device.With continually developing for lithium ion lithium battery technology, pole that energy density, safety all obtain
Big promotion；Since fuel-engined vehicle causes serious pollution to destroy ecological environment, people start lithium ion lithium gradually
Main drive of the battery as automobile.Lithium ion lithium battery has many advantages, such as that small, energy is high, pollution-free, without memory.
It is increasingly becoming the indispensable part of current energy source and power.
However, for lithium ion lithium battery, the service life is its most crucial one of characteristic, and the service life of lithium ion lithium battery is serious
The use of corresponding product is affected, therefore can accurately determine the service life of lithium lithium battery, is the development of lithium lithium battery when business
It is anxious.
Invention content
The determination method, apparatus and system that are designed to provide a kind of lithium battery and use duration of the embodiment of the present invention, from
And realize the accurate determination using duration to lithium battery, and contribute to lithium battery, especially lithium ion lithium battery, it is dynamic as the energy
Power is widely used.
To achieve the goals above, the present invention provides a kind of determination methods that lithium battery uses duration, including：
It obtains and presets the lithium battery in environment temperature and enclose internal resistance when discharging, different whole of wherein N at least two in N
Number；
Internal resistance when discharging is enclosed in N according to the lithium battery, determines the pass of the internal resistance and the electric discharge number of turns of the lithium battery
System；
According to the relationship of the internal resistance and the electric discharge number of turns, the usable duration of the lithium battery is determined.
Wherein, the lithium battery in acquisition preset temperature includes the step of N encloses internal resistance when discharging：
When the lithium battery carries out N circle electric discharges with the first discharge-rate, the voltage V of the first predetermined time is obtained0With
Electric current I0And second predetermined time voltage V1With electric current I1；Wherein, first predetermined time is the starting of N circle electric discharges
Moment, at the time of second predetermined time is that the first preset duration after the initial time of N circle electric discharges starts reaches；
According to the voltage V of first predetermined time0With electric current I0And second predetermined time voltage V1With electric current I1,
It obtains the lithium battery and encloses internal resistance R when discharging in NN。
Wherein, according to the voltage V of first predetermined time0With electric current I0And second predetermined time voltage V1And electricity
Flow I1, obtain the lithium battery and enclose internal resistance R when discharging in NNThe step of include：
According to formulaIt obtains the lithium battery and encloses internal resistance R when discharging in NN。
Wherein, internal resistance when discharging is enclosed in N according to the lithium battery, determines internal resistance and the electric discharge number of turns of the lithium battery
Relationship the step of include：
Internal resistance when discharging is enclosed in N according to the lithium battery, in the relationship R=a × n+b for determining internal resistance and the number of turns of discharging
Constant a and b；Wherein, n is the electric discharge number of turns of the lithium battery, internal resistance when R is the circle electric discharge of the lithium battery n-th.
Wherein, according to the lithium battery N enclose discharge when internal resistance, determine internal resistance with discharge the number of turns relationship R=a ×
The step of constant a and b in n+b includes：
If the electric discharge number of turns and the internal resistance that get three groups or three groups of the lithium battery or more, according to arbitrary two groups of electric discharges
The number of turns and internal resistance calculate one group of constant axAnd bx；Wherein, axFor x-th constant a, b of calculatingxFor x-th of constant b of calculating；
According to multiple constant axThe first average value obtain constant a, and according to multiple constant bxThe second average value obtain it is normal
Number b.
Wherein, according to the relationship of the internal resistance and the electric discharge number of turns, the step of usable duration for determining the lithium battery, wraps
It includes：
Obtain the nominal internal resistance of the lithium battery；
According to the relationship of the internal resistance and the electric discharge number of turns, the internal resistance for calculating the lithium battery is 2 times of the nominal internal resistance
When, the electric discharge number of turns of the lithium battery；
According to the electric discharge number of turns, the usable duration of the lithium battery is determined.
The embodiment of the present invention also provides the determining device that a kind of lithium battery uses duration, including：
Acquisition module encloses internal resistance when discharging for obtaining the lithium battery in default environment temperature in N, and wherein N is at least
For two different integers；
First determining module determines the interior of the lithium battery for enclosing internal resistance when discharging in N according to the lithium battery
The relationship of resistance and the electric discharge number of turns；
Second determining module determines can be used for the lithium battery for the relationship according to the internal resistance and the electric discharge number of turns
Duration.
Wherein, the acquisition module includes：
First acquisition submodule, for when the lithium battery carries out N circle electric discharges with the first discharge-rate, obtaining first
The voltage V of predetermined time0With electric current I0And second predetermined time voltage V1With electric current I1；Wherein, described first it is default when
It is that N encloses the initial time to discharge to carve, and first after second predetermined time starts for the initial time of N circle electric discharges presets
At the time of duration reaches；
Second acquisition submodule, for the voltage V according to first predetermined time0With electric current I0And second it is default when
The voltage V at quarter1With electric current I1, obtain the lithium battery and enclose internal resistance R when discharging in NN。
Wherein, second acquisition submodule is specifically used for：
According to formulaIt obtains the lithium battery and encloses internal resistance R when discharging in NN。
Wherein, first determining module is specifically used for：
Internal resistance when discharging is enclosed in N according to the lithium battery, in the relationship R=a × n+b for determining internal resistance and the number of turns of discharging
Constant a and b；Wherein, n is the electric discharge number of turns of the lithium battery, internal resistance when R is the circle electric discharge of the lithium battery n-th.
Wherein, first determining module is specifically additionally operable to：
If the electric discharge number of turns and the internal resistance that get three groups or three groups of the lithium battery or more, according to arbitrary two groups of electric discharges
The number of turns and internal resistance calculate one group of constant axAnd bx；Wherein, axFor x-th constant a, b of calculatingxFor x-th of constant b of calculating；
According to multiple constant axThe first average value obtain constant a, and according to multiple constant bxThe second average value obtain it is normal
Number b.
Wherein, second determining module includes：
Third acquisition submodule, the nominal internal resistance for obtaining the lithium battery；
Computational submodule calculates the internal resistance of the lithium battery as institute for the relationship according to the internal resistance and the electric discharge number of turns
When stating 2 times of nominal internal resistance, the electric discharge number of turns of the lithium battery；
Determination sub-module, for according to the electric discharge number of turns, determining the usable duration of the lithium battery.
The embodiment of the present invention also provides the determination system that a kind of lithium battery uses duration, including：Lithium battery as described above
Use the determining device of duration.
The embodiment of the present invention also provides the determination system that a kind of lithium battery uses duration, including：It processor, memory and deposits
The computer program that can be run on the memory and on the processor is stored up, the computer program is by the processor
The step of lithium battery as described above uses the determination method of duration is realized when execution.
The embodiment of the present invention also provides a kind of computer readable storage medium, is stored on the computer readable storage medium
There are computer program, the computer program to realize that lithium battery as described above uses the determination side of duration when being executed by processor
The step of method.
The above-mentioned technical proposal of the present invention at least has the advantages that：
The present invention is arranged the lithium battery in default environment by control and carries out multi-turn charge and discharge, and multiple is put preset
In the discharge process of electric circle number, the internal resistance of the lithium battery is obtained；And according to multigroup electric discharge number of turns of acquisition and internal resistance, determine institute
The relationship of the internal resistance and the electric discharge number of turns of lithium battery is stated, and according to the relationship of the internal resistance and the electric discharge number of turns, determines the lithium battery
Usable duration, realize life test to the lithium battery, simultaneously, additionally it is possible to according to the pass of the internal resistance and the electric discharge number of turns
System determines the usable duration for same type of other lithium batteries with the lithium battery, by lithium battery central characteristics
(usable duration) is predicted, the use of lithium battery anomalous effects response product is avoided, convenient for lithium ion lithium battery in power
Popularization in the energy and application.
Description of the drawings
Fig. 1 is the basic step schematic diagram that the lithium battery of the embodiment of the present invention uses the determination method of duration；
Fig. 2 is the basic composition schematic diagram that the lithium battery of the embodiment of the present invention uses the determining device of duration.
Specific implementation mode
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
The embodiment of the present invention is directed in the prior art since service life of lithium battery is unpredictable, is caused using the lithium battery
Product reliability is severely impacted so that is asked using the lithium battery as what the widely applied imagination of power source cannot achieve
Topic provides determination method, apparatus and system that a kind of lithium battery uses duration, realize by the lithium battery install to other
The lithium battery can be obtained before product uses duration, to be conducive to the lithium battery answering extensively in power source
With.
Here, it should be noted that during charge and discharge cycles, inside battery can react lithium battery, these are anti-
Should include solid electrolyte interface (Solid electrolyte interface, abbreviation：SEI) the generation and decomposition of film, electrolysis
Liquid reacts with positive and negative anodes, these reactions can all increase the thickness of SEI films, reduces electronic conduction ability in positive and negative anodes, drop
Low diaphragm ion ducting capacity, above variation show as the linearly increasing of the internal resistance of cell for lithium battery external characteristics, therefore,
The present embodiment determines the use duration of the lithium battery by the variation of the internal resistance of the lithium battery.
As shown in Figure 1, one embodiment of the invention provides a kind of determination method that lithium battery uses duration, including：
Step 11, the internal resistance for presetting the lithium battery in environment temperature when N encloses electric discharge, wherein N at least two are obtained
Different integers.
In the present embodiment, it is preferred that the default environment temperature is 25 DEG C, i.e., the lithium battery is placed on environment temperature
For in constant 25 DEG C of temperature control boxs so that in the entire test process using duration of the lithium battery, the lithium battery begins
Eventually in constant ambient temperature, influence of the outside environmental elements to the lithium battery using the test result of duration is avoided, is carried
The high accuracy and reliability of test result.
In addition, can carry out different assignment in the present embodiment to N, preferably, N can be 1,50,100,200 etc..To N
Assignment it is more, the electric discharge number of turns of acquisition and internal resistance are also more so that more accurate using the test result of duration to lithium battery.
Step 12, internal resistance when discharging is enclosed in N according to the lithium battery, determines that the internal resistance of the lithium battery is enclosed with electric discharge
Several relationships.
It should be noted that in the present embodiment, according to many experimental results early period, determines the internal resistance of the lithium battery and put
Electric circle number is a linear relationship, this linear relationship is the Life Prediction Model of the lithium battery, specifically, the life prediction
Model is：R=a × n+b, wherein R is lithium battery internal resistance, and n is the electric discharge number of turns, and a and b are constant.
Step 13, according to the relationship of the internal resistance and the electric discharge number of turns, the usable duration of the lithium battery is determined.
The lithium battery of the present embodiment uses the determination method of duration, according to one or two battery to same model
The test result of test sample can determine the Life Prediction Model of the lithium battery of this model, to avoid to each described
Lithium battery carries out the test using duration, realizes and determines its service life before installing the lithium battery, ensure that described in use
The reliability of the product of lithium battery is also reduced due to testing the loss to the lithium battery service life.
Specifically, the step 11 obtains the lithium battery in preset temperature encloses internal resistance when discharging in N, including：
When the lithium battery carries out N circle electric discharges with the first discharge-rate, the voltage V of the first predetermined time is obtained0With
Electric current I0And second predetermined time voltage V1With electric current I1；Wherein, first predetermined time is the starting of N circle electric discharges
Moment, at the time of second predetermined time is that the first preset duration after the initial time of N circle electric discharges starts reaches；According to
The voltage V of first predetermined time0With electric current I0And second predetermined time voltage V1With electric current I1, obtain the lithium electricity
Internal resistance R when discharging is enclosed in pond in NN。
Specifically, first discharge-rate is 1C；Second predetermined time is specially the initial time of N circle electric discharges
10s after beginning, i.e.,：The internal resistance of the lithium battery is tested by the way of the discharge pulse of a 10s so that the lithium electricity
Pond can maintain the constant-current discharge of a 10s, according to the initial time of the constant-current discharge of this 10s when starting N circle electric discharges
Voltage and current and the voltage and current of end of time determine that the lithium battery encloses internal resistance when discharging in N.
Here, it should be noted that due to when obtaining the internal resistance of the lithium battery, it is only necessary to which the lithium battery is discharging
Initial stage maintains the constant-current discharge of 10s, and therefore, the embodiment of the present invention does not limit during the test, and the lithium battery is in 10s perseverances
Banish the discharge mode after electricity, wherein the electricity of the lithium battery is discharged completely as early as possible in order to improve testing efficiency, it can be with
Discharge-rate after 10s constant-current discharges is adjusted to 0.2C or other discharge-rates.
In addition, during to the lithium battery test using duration, cycle is needed to carry out the lithium battery
Charge and discharge, since the embodiment of the present invention only considers internal resistance of the lithium battery in discharge process, not to lithium electricity
The charging process in pond is specifically limited.
It more specifically, can be according to formula in the present embodimentThe lithium battery is obtained to put in N circles
Internal resistance R when electricN.Since first moment is the initial time that N circles discharge, I0It should be 0A, V0For lithium electricity
Voltage when the current full power state in pond.
Specifically, step 12 encloses internal resistance when discharging according to the lithium battery in N, the pass of internal resistance and the number of turns of discharging is determined
System is specially：Internal resistance when discharging is enclosed in N according to the lithium battery, determines relationship R=a × n+b of internal resistance and the number of turns of discharging
In constant a and b；Wherein, n is the electric discharge number of turns of the lithium battery, internal resistance when R is the circle electric discharge of the lithium battery n-th.
One specific embodiment of this step determines the relationship R of internal resistance and the number of turns of discharging when N is two different integers
Constant a and b in=a × n+b is specifically, two groups of electric discharge number of turns and internal resistance corresponding with the electric discharge number of turns are assigned to described
Internal resistance and n and R in the relational expression of the electric discharge number of turns, form a linear equation in two unknowns group, to obtain the value of constant a and b so that
The Life Prediction Model of the lithium battery uniquely determines.
The another specific embodiment of this step determines internal resistance and electric discharge when N is three or three or more different integers
Constant a and b in relationship R=a × n+b of the number of turns are specially：According to arbitrary two groups of electric discharge number of turns and internal resistance, one group of constant is calculated
axAnd bx；Wherein, axFor x-th constant a, b of calculatingxFor x-th of constant b of calculating；According to multiple constant axIt is first average
Value obtains constant a, and according to multiple constant bxThe second average value obtain constant b.
The electric discharge number of turns and the internal resistance that three groups or three groups or more are obtained in the present embodiment, can calculate multiple constant a and b,
By being averaged to multiple constant a, multiple constant b are averaged so that result of calculation is more accurate, when improving lithium battery use
The accuracy of long test result.
Specifically, step 13 determines the usable duration of the lithium battery according to the relationship of the internal resistance and the electric discharge number of turns
Including：
Obtain the nominal internal resistance of the lithium battery；According to the relationship of the internal resistance and the electric discharge number of turns, the lithium battery is calculated
Internal resistance when being 2 times of the nominal internal resistance, the electric discharge number of turns of the lithium battery；According to the electric discharge number of turns, the lithium is determined
The usable duration of battery.
Wherein, it is determined by great number tested data, when the internal resistance of the lithium battery is 2 times of nominal internal resistance, the lithium
Capacity when the current full power state of battery is the 80% of nominal capacity, and the embodiment of the present invention presets expiring when the lithium battery
When the capacity of electricity condition is the 80% of nominal capacity, the state of longest usage time is reached for lithium battery.
When the relationship according to the internal resistance and the electric discharge number of turns, when determining that the internal resistance of the lithium battery is 2 times of nominal internal resistance,
After the electric discharge number of turns of the lithium battery, a length of electric discharge number of turns and the duration of each circle electric discharge when can be can be used according to lithium battery
Product calculates the usable duration of the lithium battery.Wherein, it should be noted that the duration of each circle electric discharge of lithium battery
It is related to the discharge-rate of the lithium battery, when can determine the electric discharge of its each circle according to the discharge-rate of the lithium battery
It is long.Alternatively, can directly use the electric discharge number of turns of the lithium battery as the parameter in the service life for characterizing the lithium battery.
In the following, further illustrating that the determination process of duration can be used in the lithium battery of the present embodiment with specific test data.
First, a lithium battery of certain model of certain manufacturer is chosen as test sample, and the test sample is placed
In 25 DEG C of temperature control box.
Secondly, charge and discharge are carried out for the test sample, wherein control the test sample in discharge process, discharge
The preceding 10s at initial stage is with 1C multiplying power constant-current discharges.
Then, when obtaining the 1st, 50,100 circle electric discharge respectively, the voltage and electric current of the initial time that discharges, and electric discharge starting
After moment starts, the voltage and electric current when 10s are reached, and record the voltage and electric current of acquisition, physical record result such as table 1.
Table 1
Then, according to the voltage of record and electric current, the relationship R=a of the internal resistance and the electric discharge number of turns of the test sample is determined
Constant a and b in × n+b, wherein a 0.0031, b 3.3019.
If the nominal internal resistance of the test sample is 3.310345m Ω, according to the internal resistance uniquely determined and the electric discharge number of turns
Relationship determines that total electric discharge number of turns of the test sample is 1070 times.
Finally, the accuracy of total electric discharge number of turns of the test sample determined in order to further determine this method, continues to institute
It states test sample and carries out charge and discharge, until the internal resistance of the test sample is 2 times of nominal internal resistance, specific test result
Such as table 2.
Table 2
By above-mentioned test result it was determined that true total electric discharge number of turns of the test sample is 1050 circle left and right, symbol
The total electric discharge number of turns for closing the test sample determined according to the relationship of internal resistance and the electric discharge number of turns with the method for the present embodiment, confirms
The internal resistance of the present embodiment and the relationship of the electric discharge number of turns are effective.
Therefore, it is possible to the relationship according to the above-mentioned internal resistance uniquely determined and the electric discharge number of turns, prediction is same with the test sample
Total electric discharge number of turns of other lithium batteries of model is realized before lithium battery is mounted on other products, confirms the lithium battery
Service life, improve the reliability of other products of the lithium battery and the installation lithium battery.
The determination method of the lithium battery available duration of the embodiment of the present invention, according to lithium battery internal resistance in use
Variation tendency, obtain internal resistance with discharge the number of turns relationship, to realize that accurate judgement characterizes making for the lithium battery of same model
With total electric discharge number of turns in service life so that just can determine that the longevity of the lithium battery before the lithium battery is mounted on other products
Life, improves the reliability for other products for installing the lithium battery, is conducive to the lithium battery answering extensively in power source
With.
The embodiment of the present invention also provides a kind of computer readable storage medium, is stored thereon with computer program (instruction),
The program (instruction) realizes following steps when being executed by processor：
It obtains and presets the lithium battery in environment temperature and enclose internal resistance when discharging, different whole of wherein N at least two in N
Number；Internal resistance when discharging is enclosed in N according to the lithium battery, determines the relationship of the internal resistance and the electric discharge number of turns of the lithium battery；Root
According to the relationship of the internal resistance and the electric discharge number of turns, the usable duration of the lithium battery is determined.
Optionally, following steps be can also be achieved when which is executed by processor：
When the lithium battery carries out N circle electric discharges with the first discharge-rate, the voltage V of the first predetermined time is obtained0With
Electric current I0And second predetermined time voltage V1With electric current I1；Wherein, first predetermined time is the starting of N circle electric discharges
Moment, at the time of second predetermined time is that the first preset duration after the initial time of N circle electric discharges starts reaches；According to
The voltage V of first predetermined time0With electric current I0And second predetermined time voltage V1With electric current I1, obtain the lithium electricity
Internal resistance R when discharging is enclosed in pond in NN。
Optionally, following steps be can also be achieved when which is executed by processor：
According to formulaIt obtains the lithium battery and encloses internal resistance R when discharging in NN。
Optionally, following steps be can also be achieved when which is executed by processor：
Internal resistance when discharging is enclosed in N according to the lithium battery, in the relationship R=a × n+b for determining internal resistance and the number of turns of discharging
Constant a and b；Wherein, n is the electric discharge number of turns of the lithium battery, internal resistance when R is the circle electric discharge of the lithium battery n-th.
Optionally, when N is three or three or more different integers, which may be used also when being executed by processor
Realize following steps：
If the electric discharge number of turns and the internal resistance that get three groups or three groups of the lithium battery or more, according to arbitrary two groups of electric discharges
The number of turns and internal resistance calculate one group of constant axAnd bx；Wherein, axFor x-th constant a, b of calculatingxFor x-th of constant b of calculating；
According to multiple constant axThe first average value obtain constant a, and according to multiple constant bxThe second average value obtain constant b.
Optionally, following steps be can also be achieved when which is executed by processor：
Obtain the nominal internal resistance of the lithium battery；According to the relationship of the internal resistance and the electric discharge number of turns, the lithium battery is calculated
Internal resistance when being 2 times of the nominal internal resistance, the electric discharge number of turns of the lithium battery；According to the electric discharge number of turns, the lithium is determined
The usable duration of battery.
Computer-readable medium includes permanent and non-permanent, removable and non-removable media can be by any method
Or technology realizes information storage.Information can be computer-readable instruction, data structure, the module of program or other data.
The example of the storage medium of computer includes, but are not limited to phase transition internal memory (PRAM), static RAM (SRAM), moves
State random access memory (DRAM), other kinds of random access memory (RAM), read-only memory (ROM), electric erasable
Programmable read only memory (EEPROM), fast flash memory bank or other memory techniques, read-only disc read only memory (CD-ROM) (CD-ROM),
Digital versatile disc (DVD) or other optical storages, magnetic tape cassette, tape magnetic disk storage or other magnetic storage apparatus
Or any other non-transmission medium, it can be used for storage and can be accessed by a computing device information.As defined in this article, it calculates
Machine readable medium does not include temporary computer readable media (transitory media), such as data-signal and carrier wave of modulation.
As shown in Fig. 2, the embodiment of the present invention additionally provides a kind of determining device of lithium battery available duration, including：
Acquisition module 21 encloses internal resistance when discharging for obtaining the lithium battery in default environment temperature in N, and wherein N is extremely
It is two different integers less.
First determining module 22 determines the lithium battery for enclosing internal resistance when discharging in N according to the lithium battery
The relationship of internal resistance and the electric discharge number of turns.
Second determining module 23 determines making for the lithium battery for the relationship according to the internal resistance and the electric discharge number of turns
Use duration.
The determining device of the lithium battery available duration of the embodiment of the present invention, the acquisition module 21 include：
First acquisition submodule, for when the lithium battery carries out N circle electric discharges with the first discharge-rate, obtaining first
The voltage V of predetermined time0With electric current I0And second predetermined time voltage V1With electric current I1；Wherein, described first it is default when
It is that N encloses the initial time to discharge to carve, and first after second predetermined time starts for the initial time of N circle electric discharges presets
At the time of duration reaches.
Second acquisition submodule, for the voltage V according to first predetermined time0With electric current I0And second it is default when
The voltage V at quarter1With electric current I1, obtain the lithium battery and enclose internal resistance R when discharging in NN。
Wherein, second acquisition submodule is specifically used for：According to formulaThe lithium battery is obtained to exist
Internal resistance R when N circle electric dischargesN。
The determining device of the lithium battery available duration of the embodiment of the present invention, first determining module 22 are specifically used for：Root
According to the lithium battery N enclose discharge when internal resistance, determine internal resistance with discharge the number of turns relationship R=a × n+b in constant a and
b；Wherein, n is the electric discharge number of turns of the lithium battery, internal resistance when R is the circle electric discharge of the lithium battery n-th.
Further, first determining module 22 is specifically additionally operable to：If getting three groups or three groups of the lithium battery
Above electric discharge number of turns and internal resistance calculate one group of constant a then according to arbitrary two groups of electric discharge number of turns and internal resistancexAnd bx；Wherein, axFor
X-th the constant a, b calculatedxFor x-th of constant b of calculating；According to multiple constant axThe first average value obtain constant a, and root
According to multiple constant bxThe second average value obtain constant b.
The determining device of the lithium battery available duration of the embodiment of the present invention, second determining module 23 include：
Third acquisition submodule, the nominal internal resistance for obtaining the lithium battery.
Computational submodule calculates the internal resistance of the lithium battery as institute for the relationship according to the internal resistance and the electric discharge number of turns
When stating 2 times of nominal internal resistance, the electric discharge number of turns of the lithium battery.
Determination sub-module, for according to the electric discharge number of turns, determining the usable duration of the lithium battery.
The determining device of the lithium battery available duration of the embodiment of the present invention, multigroup internal resistance by acquisition and the electric discharge number of turns,
It determines the relationship of the internal resistance and the electric discharge number of turns of the lithium battery, and according to the relationship of internal resistance and the electric discharge number of turns, determines when internal resistance reaches
To when 2 times of nominal internal resistances for characterizing the service life of lithium battery, the charge and discharge number of turns of the lithium battery, so that it is determined that the lithium battery
Service life, and according to the relationship of the internal resistance and the electric discharge number of turns, predict total electric discharge number of turns of other lithium batteries of same model, in turn
The use duration that the lithium battery is determined according to total electric discharge number of turns, realizes before using the lithium battery, determines institute
The service life for stating lithium battery improves the reliability of product.
The embodiment of the present invention also provides the determination system that a kind of lithium battery uses duration, including lithium battery as described above makes
With the determination device of duration.
The embodiment of the present invention also provides the determination system that a kind of lithium battery uses duration, including：It processor, memory and deposits
The computer program that can be run on the memory and on the processor is stored up, the computer program is by the processor
Each process of the lithium battery as described above using the determination embodiment of the method for duration is realized when execution, and can reach identical skill
Art effect, to avoid repeating, which is not described herein again.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, several improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (15)
1. a kind of lithium battery uses the determination method of duration, which is characterized in that including：
Obtain the internal resistance for presetting the lithium battery in environment temperature when N encloses electric discharge, wherein integers different N at least two；
Internal resistance when discharging is enclosed in N according to the lithium battery, determines the relationship of the internal resistance and the electric discharge number of turns of the lithium battery；
According to the relationship of the internal resistance and the electric discharge number of turns, the usable duration of the lithium battery is determined.
2. lithium battery according to claim 1 uses the determination method of duration, which is characterized in that obtain in preset temperature
Lithium battery N enclose discharge when internal resistance the step of include：
When the lithium battery carries out N circle electric discharges with the first discharge-rate, the voltage V of the first predetermined time is obtained0And electric current
I0And second predetermined time voltage V1With electric current I1；Wherein, when first predetermined time is the starting of N circle electric discharges
It carves, at the time of second predetermined time is that the first preset duration after the initial time of N circle electric discharges starts reaches；
According to the voltage V of first predetermined time0With electric current I0And second predetermined time voltage V1With electric current I1, obtain
The lithium battery encloses internal resistance R when discharging in NN。
3. lithium battery according to claim 2 uses the determination method of duration, which is characterized in that default according to described first
The voltage V at moment0With electric current I0And second predetermined time voltage V1With electric current I1, obtain the lithium battery and put in N circles
Internal resistance R when electricNThe step of include：
According to formulaIt obtains the lithium battery and encloses internal resistance R when discharging in NN。
4. lithium battery according to claim 1 uses the determination method of duration, which is characterized in that existed according to the lithium battery
Internal resistance when N circle electric discharges, the step of determining the internal resistance of the lithium battery and the relationship for the number of turns of discharging include：
According to the lithium battery N enclose discharge when internal resistance, determine internal resistance with electric discharge the number of turns relationship R=a × n+b in it is normal
Number a and b；Wherein, n is the electric discharge number of turns of the lithium battery, internal resistance when R is the circle electric discharge of the lithium battery n-th.
5. lithium battery according to claim 4 uses the determination method of duration, which is characterized in that existed according to the lithium battery
N circle electric discharge when internal resistance, determine internal resistance with electric discharge the number of turns relationship R=a × n+b in constant a and b the step of include：
If the electric discharge number of turns and the internal resistance that get three groups or three groups of the lithium battery or more, according to arbitrary two groups of electric discharge number of turns
And internal resistance, calculate one group of constant axAnd bx；Wherein, axFor x-th constant a, b of calculatingxFor x-th of constant b of calculating；
According to multiple constant axThe first average value obtain constant a, and according to multiple constant bxThe second average value obtain constant b.
6. lithium battery according to claim 1 use duration determination method, which is characterized in that according to the internal resistance with put
The step of relationship of electric circle number, the usable duration for determining the lithium battery includes：
Obtain the nominal internal resistance of the lithium battery；
According to the relationship of the internal resistance and the electric discharge number of turns, when the internal resistance for calculating the lithium battery is 2 times of the nominal internal resistance, institute
State the electric discharge number of turns of lithium battery；
According to the electric discharge number of turns, the usable duration of the lithium battery is determined.
7. a kind of lithium battery uses the determining device of duration, which is characterized in that including：
Acquisition module encloses internal resistance when discharging for obtaining the lithium battery in default environment temperature in N, and wherein N is at least two
A different integer；
First determining module, for enclosing internal resistance when discharging in N according to the lithium battery, determine the internal resistance of the lithium battery with
The relationship for the number of turns of discharging；
Second determining module determines the usable duration of the lithium battery for the relationship according to the internal resistance and the electric discharge number of turns.
8. lithium battery according to claim 7 uses the determining device of duration, which is characterized in that the acquisition module packet
It includes：
First acquisition submodule, for when the lithium battery carries out N circle electric discharges with the first discharge-rate, it is default to obtain first
The voltage V at moment0With electric current I0And second predetermined time voltage V1With electric current I1；Wherein, first predetermined time is
The initial time of N circle electric discharges, second predetermined time are the first preset duration after the initial time of N circle electric discharges starts
At the time of arrival；
Second acquisition submodule, for the voltage V according to first predetermined time0With electric current I0And second predetermined time
Voltage V1With electric current I1, obtain the lithium battery and enclose internal resistance R when discharging in NN。
9. lithium battery according to claim 8 uses the determining device of duration, which is characterized in that described second obtains submodule
Block is specifically used for：
According to formulaIt obtains the lithium battery and encloses internal resistance R when discharging in NN。
10. lithium battery according to claim 7 uses the determining device of duration, which is characterized in that described first determines mould
Block is specifically used for：
According to the lithium battery N enclose discharge when internal resistance, determine internal resistance with electric discharge the number of turns relationship R=a × n+b in it is normal
Number a and b；Wherein, n is the electric discharge number of turns of the lithium battery, internal resistance when R is the circle electric discharge of the lithium battery n-th.
11. lithium battery according to claim 10 uses the determining device of duration, which is characterized in that described first determines mould
Block is specifically additionally operable to：
If the electric discharge number of turns and the internal resistance that get three groups or three groups of the lithium battery or more, according to arbitrary two groups of electric discharge number of turns
And internal resistance, calculate one group of constant axAnd bx；Wherein, axFor x-th constant a, b of calculatingxFor x-th of constant b of calculating；
According to multiple constant axThe first average value obtain constant a, and according to multiple constant bxThe second average value obtain constant b.
12. lithium battery according to claim 7 uses the determining device of duration, which is characterized in that described second determines mould
Block includes：
Third acquisition submodule, the nominal internal resistance for obtaining the lithium battery；
Computational submodule, for the relationship according to the internal resistance and the electric discharge number of turns, the internal resistance for calculating the lithium battery is the mark
When claiming 2 times of internal resistance, the electric discharge number of turns of the lithium battery；
Determination sub-module, for according to the electric discharge number of turns, determining the usable duration of the lithium battery.
13. a kind of lithium battery uses the determination system of duration, which is characterized in that including：As described in any one of claim 7 to 12
Lithium battery use duration determining device.
14. a kind of lithium battery uses the determination system of duration, which is characterized in that including：It processor, memory and is stored in described
It is real when the computer program is executed by the processor on memory and the computer program that can run on the processor
The step of now using the determination method of duration such as lithium battery according to any one of claims 1 to 6.
15. a kind of computer readable storage medium, which is characterized in that be stored with computer on the computer readable storage medium
Program, when realized when the computer program is executed by processor such as lithium battery according to any one of claims 1 to 6 use
The step of long determination method.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111682807A (en) * | 2019-02-22 | 2020-09-18 | 佛山市顺德区美的电热电器制造有限公司 | Motor operation control apparatus, motor operation control method, transmission device, and storage medium |
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