CN108061860A - A kind of self-discharge of battery detection method and lithium battery method for sorting - Google Patents
A kind of self-discharge of battery detection method and lithium battery method for sorting Download PDFInfo
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- CN108061860A CN108061860A CN201711190116.6A CN201711190116A CN108061860A CN 108061860 A CN108061860 A CN 108061860A CN 201711190116 A CN201711190116 A CN 201711190116A CN 108061860 A CN108061860 A CN 108061860A
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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]
- G01R31/385—Arrangements for measuring battery or accumulator variables
- G01R31/3865—Arrangements for measuring battery or accumulator variables related to manufacture, e.g. testing after manufacture
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Abstract
The invention discloses a kind of self-discharge of battery detection method and lithium battery method for sorting, are related to battery detecting technical field.Mesuring battary is discharged to 0% state-of-charge, forms the first empty charged pond；The first preset time period under the first preset temperature is shelved into first empty charged pond, the second empty charged pond is formed, obtains first voltage；The second preset time period under the second preset temperature is shelved into second empty charged pond, the 3rd empty charged pond is formed, obtains second voltage；The self-discharge rate of mesuring battary is calculated according to first voltage, second voltage and the second preset time period.Compared with prior art, the step of self-discharge of battery detection method provided by the invention under the second preset temperature by the second empty charged pond as a result of the second preset time period is shelved, institute is so as to accurately measure first voltage and second voltage, and calculate self-discharge rate using first voltage and second voltage, measuring process is simple, measurement cost is low, and measurement result is reliable.
Description
Technical field
The present invention relates to battery detecting technical field, in particular to a kind of self-discharge of battery detection method and lithium
Battery sorting method.
Background technology
Lithium battery is widely used in digital product, new-energy automobile, honourable energy storage, telecomm base station redundant electrical power, electronic work
Fields, the performance of battery such as tool and battery-operated motor cycle directly influence the using effect of terminal.Inventor is the study found that battery system
After the completion of making, inevitably there are problems that self discharge, self discharge is the inherent characteristic of battery, but self discharge is excessive, is battery
A kind of performance of failure, existing technology cannot accurately measure the self discharge size of lithium battery, so as to cause production
Go out underproof lithium battery, there are security risks.
In view of this, a kind of self-discharge of battery detection method that can accurately measure self discharge size and lithium electricity are designed
Pond method for sorting is particularly particularly important in battery production.
The content of the invention
It is an object of the invention to provide a kind of self-discharge of battery detection method, be capable of accurately measure lithium battery from
Discharge rate, measuring process is simple, and measurement cost is low, and measurement result is reliable.
Another object of the present invention is to provide a kind of lithium battery method for sorting, it is capable of accurately measure lithium battery oneself
Discharge rate, measuring process is simple, and measurement cost is low, and measurement result is reliable, practicality and high efficiency.
The present invention is realized using following technical solution.
A kind of self-discharge of battery detection method, for detecting the self-discharge rate of mesuring battary, self-discharge of battery detection method
Including：Mesuring battary is discharged to 0% state-of-charge, forms the first empty charged pond；By the first empty charged pond in the first default temperature
The first preset time period is shelved under degree, forms the second empty charged pond, the empty charged pond of measurement second obtains first voltage；By second
The second preset time period is shelved in empty charged pond under the second preset temperature, forms the 3rd empty charged pond, measures the 3rd empty charged pond,
Obtain second voltage；The self-discharge rate of mesuring battary is calculated according to first voltage, second voltage and the second preset time period.
Further, the self discharge of mesuring battary is calculated according to first voltage, second voltage and the second preset time period
In the step of rate, the self-discharge rate of mesuring battary is calculated using calculation formula, calculation formula is：K=V2/V1/T；K is in formula
The self-discharge rate of mesuring battary, V2For second voltage, V1For first voltage, T is the second preset time period.
Further, the step of mesuring battary being discharged to 0% state-of-charge, forming the first sky charged pond includes：It is right
Mesuring battary carries out preliminary electric discharge, forms preliminary empty charged pond；Deep discharge is carried out to preliminary empty charged pond, forms the first empty lotus
Battery.
Further, the step of carrying out preliminary electric discharge to mesuring battary, forming preliminary empty charged pond includes：By mesuring battary
Preliminary electric discharge is carried out with the first predetermined current under the first preset temperature, forms preliminary empty charged pond.
Further, the first predetermined current is the electric current of the rated current of 0.5 to 1 times of mesuring battary.
Further, the step of carrying out deep discharge to preliminary empty charged pond, form the first empty charged pond includes：It will be preliminary
Empty charged pond carries out deep discharge to 0% state-of-charge under the first preset temperature with the second predetermined current, forms the first empty lotus
Battery.
Further, the second predetermined current is the electric current of the rated current of 0.1 to 0.5 times of mesuring battary.
Further, the first preset temperature is less than the second preset temperature.
Further, the second preset time period is more than the first preset time period.
A kind of lithium battery method for sorting for detecting the self-discharge rate of mesuring battary, and filters out not according to self-discharge rate
Spec battery, lithium battery method for sorting include：Mesuring battary is discharged to 0% state-of-charge, forms the first empty charged pond；By
The first preset time period is shelved in one empty charged pond under the first preset temperature, forms the second empty charged pond, and measurement second is empty charged
Pond obtains first voltage；The second preset time period under the second preset temperature is shelved into second empty charged pond, forms the 3rd empty lotus
Battery, the empty charged pond of measurement the 3rd, obtains second voltage；It is calculated according to first voltage, second voltage and the second preset time period
Go out the self-discharge rate of mesuring battary；Statistical analysis is carried out to self-discharge rate according to normal distribution, it is more than default to select self-discharge rate
The mesuring battary of value is unqualified battery.
Self-discharge of battery detection method provided by the invention and lithium battery method for sorting have the advantages that：
Mesuring battary is discharged to 0% state-of-charge, it is empty to form first by self-discharge of battery detection method provided by the invention
Charged pond；The first preset time period under the first preset temperature is shelved into first empty charged pond, the second empty charged pond is formed, measures
First voltage；The second preset time period under the second preset temperature is shelved into second empty charged pond, measures second voltage, according to the
One voltage, second voltage and the second preset time period calculate the self-discharge rate of mesuring battary.Compared with prior art, it is of the invention
The self-discharge of battery detection method of offer is preset as a result of the second empty charged pond is shelved second under the second preset temperature
The step of period, institute is so as to accurately measure first voltage and second voltage, and utilize first voltage and second voltage
Self-discharge rate is calculated, measuring process is simple, and measurement cost is low, and measurement result is reliable.
Lithium battery method for sorting provided by the invention including self-discharge of battery detection method, can accurately measure first
Voltage and second voltage, and self-discharge rate is calculated using first voltage and second voltage, measuring process is simple, measurement cost
Low, measurement result is reliable, practicality and high efficiency.
Description of the drawings
It in order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of scope, for those of ordinary skill in the art, without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the FB(flow block) for the self-discharge of battery detection method that first embodiment of the invention provides；
Fig. 2 is the FB(flow block) for the lithium battery method for sorting that second embodiment of the invention provides.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical solution in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, instead of all the embodiments.The present invention implementation being usually described and illustrated herein in the accompanying drawings
The component of example can configure to arrange and design with a variety of.
Therefore, below the detailed description of the embodiment of the present invention to providing in the accompanying drawings be not intended to limit it is claimed
The scope of the present invention, but be merely representative of the present invention selected embodiment.Based on the embodiments of the present invention, this field is common
Technical staff's all other embodiments obtained without creative efforts belong to the model that the present invention protects
It encloses.
It should be noted that：Similar label and letter represents similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.
In the description of the present invention, it is necessary to explanation, the instructions such as term " interior ", " outer ", " on ", " under ", " level "
Orientation or position relationship be based on orientation shown in the drawings or position relationship or the invention product using when usually put
Orientation or position relationship, be for only for ease of the description present invention and simplify description rather than instruction or imply signified device or
Element must have specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.This
Outside, term " first ", " second ", " the 3rd " etc. are only used for distinguishing description, and it is not intended that instruction or hint relative importance.
In the description of the present invention, it is also necessary to explanation, unless otherwise clearly defined and limited, term " setting ",
" connected ", " installation ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or one
It connects body；Can be mechanical connection or electrical connection；It can be directly connected, it can also be indirect by intermediary
It is connected, can is the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in the present invention.
Below in conjunction with the accompanying drawings, elaborate to some embodiments of the present invention.In the case where there is no conflict, it is following
Feature in embodiment can be mutually combined.
First embodiment
Fig. 1 is refer to, an embodiment of the present invention provides a kind of self-discharge of battery detection method, for detecting mesuring battary
Self-discharge rate.It is capable of the self-discharge rate of accurately measure lithium battery, and measuring process is simple, and measurement cost is low, measurement result
Reliably.The self-discharge of battery detection method comprises the following steps：
Step S101：Mesuring battary is discharged to 0% state-of-charge, forms the first empty charged pond.
Specifically, in step S101, preliminary electric discharge is carried out to mesuring battary first, forms preliminary empty charged pond；Then
Deep discharge is carried out to preliminary empty charged pond, forms the first empty charged pond.
It is worth noting that, in preliminary empty charged pond and the first empty charged pond in objective fact remaining part electricity
The electricity in the empty charged pond of electricity ratio first in amount, the tentatively charged pond of sky is more.
It is in the step of carrying out preliminary electric discharge to mesuring battary, form preliminary empty charged pond, mesuring battary is pre- first
If preliminary electric discharge is carried out with the first predetermined current at a temperature of, forms preliminary empty charged pond.
It is worth noting that, electric current of first predetermined current for the rated current of 0.5 to 1 times of mesuring battary, the present embodiment
In, the first predetermined current is the electric current of the rated current of 1 times of mesuring battary.Under the current strength, the electricity in mesuring battary
It can be lost in speed quickly, improve detection efficiency, but under this current strength, can only accomplish that the preliminary of mesuring battary is put
Electricity, the electricity in mesuring battary have more retain.
It, will preliminary empty charged pond in the step of carrying out deep discharge to preliminary empty charged pond, form the first empty charged pond
Deep discharge is carried out to 0% state-of-charge with the second predetermined current under the first preset temperature, forms the first empty charged pond.
It is worth noting that, electric current of second predetermined current for the rated current of 0.1 to 0.5 times of mesuring battary, this implementation
In example, the first predetermined current is the electric current of the rated current of 0.1 times of mesuring battary.Under the current strength, preliminary empty charged pond
Interior electricity can be lost in slower speed, but under this current strength, can accomplish the deep discharge in preliminary empty charged pond,
Until 0% state-of-charge, forms the first empty charged pond.
It is worth noting that, at this time 0% state-of-charge in the first empty charged pond be not in complete meaning without electricity,
But these electricity are very little, it is small to can be ignored.
Step S102：The first preset time period under the first preset temperature is shelved into first empty charged pond, it is empty to form second
Charged pond, the empty charged pond of measurement second, obtains first voltage.
It is worth noting that, when the first preset time period is 12 to 24 small, in the present embodiment, the first preset time period is 24
Hour, so that the first empty charged pond is discharged naturally in the state of shelving, release remaining part electricity.
It is worth noting that, the first preset temperature is room temperature, it is 20 to 30 degrees Celsius, in the present embodiment, first is default
Temperature is 20 degrees Celsius, and the empty charged pond of simulation first is shelved naturally at normal temperatures.
Step S103：The second preset time period under the second preset temperature is shelved into second empty charged pond, it is empty to form the 3rd
Charged pond, the empty charged pond of measurement the 3rd, obtains second voltage.
It is worth noting that, when the second preset time period is 96 to 120 small, in the present embodiment, the second preset time period is
120 it is small when so that nature electric discharge is continued in the second empty charged pond in the state of shelving, release the part electricity of remnants.
It is worth noting that, the second preset temperature is 40 to 50 degrees Celsius, in the present embodiment, the second preset temperature is taken the photograph for 50
The loss of electricity is accelerated in family name's degree, the empty charged pond of simulation second at high temperature.
Step S104：The self discharge of mesuring battary is calculated according to first voltage, second voltage and the second preset time period
Rate.
The step of self-discharge rate of mesuring battary is calculated according to first voltage, second voltage and the second preset time period
In, the self-discharge rate of mesuring battary is calculated using calculation formula, calculation formula is：K=V2/V1/T；K is mesuring battary in formula
Self-discharge rate, V2For second voltage, V1For first voltage, T is the second preset time period.
Mesuring battary is discharged to 0% state-of-charge by self-discharge of battery detection method provided in an embodiment of the present invention, is formed
First empty charged pond；The first preset time period under the first preset temperature is shelved into first empty charged pond, it is empty charged to form second
Pond measures first voltage；The second preset time period under the second preset temperature is shelved into second empty charged pond, measures the second electricity
Pressure calculates the self-discharge rate of mesuring battary according to first voltage, second voltage and the second preset time period.With prior art phase
Than self-discharge of battery detection method provided by the invention is shelved as a result of by the second empty charged pond under the second preset temperature
The step of second preset time period, institute so as to accurately measure first voltage and second voltage, and using first voltage and
Second voltage calculates self-discharge rate, and measuring process is simple, and measurement cost is low, and measurement result is reliable.
Second embodiment
Fig. 2 is refer to, an embodiment of the present invention provides a kind of lithium battery method for sorting, for detecting putting certainly for mesuring battary
Electric rate, and unqualified battery is filtered out according to self-discharge rate.It is capable of the self-discharge rate of accurately measure lithium battery, measurement step
Rapid simple, measurement cost is low, and measurement result is reliable, practicality and high efficiency.Compared with first embodiment, embodiment adds a steps
Suddenly, which comprises the following steps：
Step S201：Mesuring battary is discharged to 0% state-of-charge, forms the first empty charged pond.
Step S202：The first preset time period under the first preset temperature is shelved into first empty charged pond, it is empty to form second
Charged pond, the empty charged pond of measurement second, obtains first voltage.
Step S203：The second preset time period under the second preset temperature is shelved into second empty charged pond, it is empty to form the 3rd
Charged pond, the empty charged pond of measurement the 3rd, obtains second voltage.
Step S204：The self discharge of mesuring battary is calculated according to first voltage, second voltage and the second preset time period
Rate.
Specifically, the self-discharge rate of mesuring battary is calculated using calculation formula, calculation formula is：K=V2/V1/T；In formula
K be mesuring battary self-discharge rate, V2For second voltage, V1For first voltage, T is the second preset time period.
Step S205：Statistical analysis is carried out to self-discharge rate according to normal distribution, it is more than preset value to select self-discharge rate
Mesuring battary is unqualified battery.
Specifically, in step S205, self-discharge rate K is counted according to conventional standardized normal distribution N (μ, σ ^2)
Analysis, preset value are 3 σ.If self-discharge rate K is more than 3 σ of preset value, the mesuring battary can be judged for unqualified battery；If from
Discharge rate K is less than or equal to 3 σ of preset value, and the mesuring battary can be judged for spec battery.
Self-discharge of battery detection method provided in an embodiment of the present invention, increases on the basis of self-discharge of battery detection method
Statistical analysis is carried out to self-discharge rate according to normal distribution, the mesuring battary that self-discharge rate is more than preset value is unqualified battery
The step of so that user can sort prediction battery according to the result of judgement, by qualified battery and underproof electricity
Pond distinguishes, and convenient for doing different processing, measuring process is simple, and measurement cost is low, and measurement result is reliable, practicality and high efficiency.
It these are only the preferred embodiment of the present invention, be not intended to limit the invention, for those skilled in the art
For member, the invention may be variously modified and varied.Any modification within the spirit and principles of the invention, being made,
Equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of self-discharge of battery detection method, for detecting the self-discharge rate of mesuring battary, which is characterized in that the battery is certainly
Discharge detection method includes：
The mesuring battary is discharged to 0% state-of-charge, forms the first empty charged pond；
The first preset time period under the first preset temperature is shelved into described first empty charged pond, the second empty charged pond is formed, surveys
The described second empty charged pond is measured, obtains first voltage；
The second preset time period under the second preset temperature is shelved into described second empty charged pond, the 3rd empty charged pond is formed, surveys
The described 3rd empty charged pond is measured, obtains second voltage；
Putting certainly for the mesuring battary is calculated according to the first voltage, the second voltage and second preset time period
Electric rate.
2. self-discharge of battery detection method according to claim 1, which is characterized in that it is described according to the first voltage,
In the step of second voltage and second preset time period calculate the self-discharge rate of the mesuring battary, calculating is utilized
Formula calculates the self-discharge rate of the mesuring battary, and the calculation formula is：
K=V2/V1/T；
In formula K be the mesuring battary self-discharge rate, V2For the second voltage, V1For the first voltage, T is described the
Two preset time periods.
3. self-discharge of battery detection method according to claim 1, which is characterized in that described to put the mesuring battary
To 0% state-of-charge, the step of forming the first empty charged pond, includes electricity：
Preliminary electric discharge is carried out to the mesuring battary, forms preliminary empty charged pond；
Deep discharge is carried out to the preliminary charged pond of sky, forms the described first empty charged pond.
4. self-discharge of battery detection method according to claim 3, which is characterized in that described to be carried out to the mesuring battary
The step of preliminary electric discharge, formation preliminary sky charged pond, includes：
The mesuring battary is subjected to preliminary electric discharge with the first predetermined current under first preset temperature, is formed described preliminary
Empty charged pond.
5. self-discharge of battery detection method according to claim 4, which is characterized in that first predetermined current is 0.5
To the electric current of the rated current of 1 times of mesuring battary.
6. self-discharge of battery detection method according to claim 4, which is characterized in that described to the preliminary charged pond of sky
The step of carrying out deep discharge, forming the described first empty charged pond includes：
The preliminary charged pond of sky is subjected to deep discharge to 0% charged under first preset temperature with the second predetermined current
State forms the described first empty charged pond.
7. self-discharge of battery detection method according to claim 6, which is characterized in that second predetermined current is 0.1
To the electric current of the rated current of 0.5 times of mesuring battary.
8. self-discharge of battery detection method according to claim 1, which is characterized in that first preset temperature is less than institute
State the second preset temperature.
9. self-discharge of battery detection method according to claim 1, which is characterized in that second preset time period is more than
First preset time period.
10. a kind of lithium battery method for sorting, for detecting the self-discharge rate of mesuring battary, and filters out according to self-discharge rate and does not conform to
Lattice battery, which is characterized in that the lithium battery method for sorting includes：
The mesuring battary is discharged to 0% state-of-charge, forms the first empty charged pond；
The first preset time period under the first preset temperature is shelved into described first empty charged pond, the second empty charged pond is formed, surveys
The described second empty charged pond is measured, obtains first voltage；
The second preset time period under the second preset temperature is shelved into described second empty charged pond, the 3rd empty charged pond is formed, surveys
The described 3rd empty charged pond is measured, obtains second voltage；
Putting certainly for the mesuring battary is calculated according to the first voltage, the second voltage and second preset time period
Electric rate；
Statistical analysis is carried out to the self-discharge rate according to normal distribution, selectes the electricity to be measured that self-discharge rate is more than preset value
Pond is the unqualified battery.
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| CN113311346B (en) * | 2021-05-19 | 2024-02-06 | 北京车和家信息技术有限公司 | Battery cell early warning method and device, cloud platform and storage medium |
| CN113466727A (en) * | 2021-07-07 | 2021-10-01 | 广州鹏辉能源科技股份有限公司 | Battery self-discharge screening method and device, terminal equipment and readable storage medium |
| CN113687256A (en) * | 2021-07-29 | 2021-11-23 | 合肥国轩高科动力能源有限公司 | Method for evaluating influence of monomer self-discharge rate on consistency of battery system |
| CN113687256B (en) * | 2021-07-29 | 2024-03-08 | 合肥国轩高科动力能源有限公司 | Method for evaluating influence of monomer self-discharge rate on consistency of battery system |
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Application publication date: 20180522 |