CN105938161A - Battery internal resistance test method and system - Google Patents
Battery internal resistance test method and system Download PDFInfo
- Publication number
- CN105938161A CN105938161A CN201610529598.2A CN201610529598A CN105938161A CN 105938161 A CN105938161 A CN 105938161A CN 201610529598 A CN201610529598 A CN 201610529598A CN 105938161 A CN105938161 A CN 105938161A
- Authority
- CN
- China
- Prior art keywords
- internal resistance
- battery
- temperature
- straight line
- discharge current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
-
- 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]
- G01R31/389—Measuring internal impedance, internal conductance or related variables
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a battery internal resistance test method and a battery internal resistance test system. The battery internal resistance test method includes the following steps that: the discharge current, first temperature and second temperature of a battery under each of different discharge rates are acquired, wherein the first temperature is the temperature of the head of the cell of the battery at a time point when the power of the battery achieves 50% of the total power of the battery, the second temperature is the temperature of the head of the cell of the battery at a time point when the power of the battery achieves the preset minimum power of the battery; and an alternating current inner resistance line is obtained according to the discharge current and the first temperature; a direct current inner resistance line is obtained according to the discharge current and the second temperature; the alternating current inner resistance of the battery is calculated according to the alternating current inner resistance line; and the direct current inner resistance of the battery is calculated according to the direct current inner resistance line. With the battery internal resistance test method and system of the invention adopted, when the inner resistance of the battery is tested, the alternating current inner resistance and the direct current inner resistance of the battery can be obtained simultaneously according to relations among the discharge current, the first temperature and the second temperature, and therefore, a test process is simple, and test cost is low.
Description
Technical field
The present invention relates to cell art, particularly relate to method of testing and the system of a kind of internal resistance of cell.
Background technology
The internal resistance of battery refers to battery operationally, and discharge current flows through the resistance suffered by inside battery, electricity
The internal resistance in pond is one of important symbol of battery, and either battery capacity is not enough or discharge and recharge is improper etc., all
Can be showed by the change of the internal resistance of battery, thus can come battery by measuring the internal resistance of battery
Duty be estimated.The internal resistance of battery is divided into AC internal Resistance and DC internal resistance.Existing test battery
The method of internal resistance is to use the AC internal Resistance of AC internal Resistance tester test battery, uses DC internal resistance tester
Or the DC internal resistance of charge-discharge test cabinet test battery；The AC internal Resistance of battery and DC internal resistance need to separate into
Row test, it is impossible to by once testing the AC internal Resistance and DC internal resistance drawing battery simultaneously.
Summary of the invention
The invention provides method of testing and the system of a kind of internal resistance of cell, the method and system can be by one
Secondary test draws AC internal Resistance and the DC internal resistance of battery simultaneously.
For realizing above-mentioned design, the present invention by the following technical solutions:
On the one hand, it is provided that the method for testing of a kind of internal resistance of cell, including:
Under different multiplying discharge scenario, gather respectively the discharge current of battery in the case of each multiplying power discharging,
First temperature and the second temperature；When described first temperature is total electricity 50% that battery electric quantity arrives described battery
The battery battery core head temperature carved, described second temperature is the preset minimum electricity that battery electric quantity arrives described battery
The battery battery core head temperature in amount moment；
AC internal Resistance straight line is obtained according to described discharge current and described first temperature；According to described discharge current
DC internal resistance straight line is obtained with described second temperature；
The AC internal Resistance of described battery is calculated according to described AC internal Resistance straight line；According to described DC internal resistance straight line
Calculate the DC internal resistance of described battery.
Wherein, described obtain AC internal Resistance straight line according to described discharge current and described first temperature, including:
With discharge current as abscissa, temperature create the first coordinate diagram for vertical coordinate；
By the described discharge current in the case of each multiplying power discharging described and the scatterplot of described first temperature composition
It is plotted in described first coordinate diagram, the scatterplot in the first coordinate diagram described in matching, obtains AC internal Resistance straight line.
Wherein, described obtain DC internal resistance straight line according to described discharge current and described second temperature, including:
With discharge current as abscissa, temperature create the second coordinate diagram for vertical coordinate；
By the described discharge current in the case of each multiplying power discharging described and the scatterplot of described second temperature composition
It is plotted in described second coordinate diagram, the scatterplot in the second coordinate diagram described in matching, obtains DC internal resistance straight line.
Wherein, the described AC internal Resistance calculating described battery according to described AC internal Resistance straight line, including:
Calculate the slope of described AC internal Resistance straight line；The slope of described AC internal Resistance straight line is multiplied by pre-set factory
Obtain the value of the AC internal Resistance of described battery；
The described DC internal resistance calculating described battery according to described DC internal resistance straight line, including:
Calculate the slope of described DC internal resistance straight line；The slope of described DC internal resistance straight line is multiplied by pre-set factory
Obtain the value of the DC internal resistance of described battery.
Wherein, described pre-set factory is 10；
Described AC internal Resistance is: the slope of described AC internal Resistance straight line is multiplied by 10, and unit is milliohm；
Described DC internal resistance is: the slope of described DC internal resistance straight line is multiplied by 10, and unit is milliohm.
Wherein, described battery is high power type ternary cylinder 18650 series battery or high-energy type ternary cylinder
18650 series batteries；
Described different multiplying includes: 1 times, 2.5 times, 5 times, 7.5 times, 10 times, 12.5 times and 15 times.
On the other hand, it is provided that the test system of a kind of internal resistance of cell, including:
Collecting unit, under different multiplying discharge scenario, gathers battery in the case of each multiplying power discharging respectively
Discharge current, the first temperature and the second temperature；Described first temperature is that battery electric quantity arrives described battery
The battery battery core head temperature in total electricity 50% moment, described second temperature is that battery electric quantity arrives described battery
The battery battery core head temperature in preset minimum electricity moment；
Obtain unit, obtain AC internal Resistance straight line according to described discharge current and described first temperature；According to institute
State discharge current and described second temperature obtains DC internal resistance straight line；
Computing unit, calculates the AC internal Resistance of described battery according to described AC internal Resistance straight line；According to described directly
Stream internal resistance straight line calculates the DC internal resistance of described battery.
Wherein, described obtain AC internal Resistance straight line according to described discharge current and described first temperature, including:
With discharge current as abscissa, temperature create the first coordinate diagram for vertical coordinate；
By the described discharge current in the case of each multiplying power discharging described and the scatterplot of described first temperature composition
It is plotted in described first coordinate diagram, the scatterplot in the first coordinate diagram described in matching, obtains AC internal Resistance straight line；
Described obtain DC internal resistance straight line according to described discharge current and described second temperature, including:
With discharge current as abscissa, temperature create the second coordinate diagram for vertical coordinate；
By the described discharge current in the case of each multiplying power discharging described and the scatterplot of described second temperature composition
It is plotted in described second coordinate diagram, the scatterplot in the second coordinate diagram described in matching, obtains DC internal resistance straight line.
Wherein, the described AC internal Resistance calculating described battery according to described AC internal Resistance straight line, including:
Calculate the slope of described AC internal Resistance straight line；The slope of described AC internal Resistance straight line is multiplied by pre-set factory
Obtain the value of the AC internal Resistance of described battery；
Described according to described DC internal resistance straight line calculate described battery DC internal resistance, including: calculate described directly
The slope of stream internal resistance straight line；The slope of described DC internal resistance straight line is multiplied by pre-set factory and obtains described battery
The value of DC internal resistance；
Described pre-set factory is 10；Described AC internal Resistance is: the slope of described AC internal Resistance straight line is multiplied by 10,
Unit is milliohm；Described DC internal resistance is: the slope of described DC internal resistance straight line is multiplied by 10, and unit is milli
Ohm.
Wherein, described battery is high power type ternary cylinder 18650 series battery or high-energy type ternary cylinder
18650 series batteries；
Described different multiplying includes: 1 times, 2.5 times, 5 times, 7.5 times, 10 times, 12.5 times and 15 times.
The invention have the benefit that the embodiment of the present invention is passed through, under different multiplying discharge scenario, to adopt respectively
Collect the discharge current of battery in the case of each multiplying power discharging, the first temperature and the second temperature；Described first temperature
Degree is the battery battery core head temperature in total electricity 50% moment of the battery electric quantity described battery of arrival, described second
Temperature is the battery battery core head temperature that battery electric quantity arrives the preset minimum electricity moment of described battery；According to
Described discharge current and described first temperature obtain AC internal Resistance straight line；According to described discharge current and described
Two temperature obtain DC internal resistance straight line；The AC internal Resistance of described battery is calculated according to described AC internal Resistance straight line；
The DC internal resistance of described battery is calculated according to described DC internal resistance straight line.The discharge process of battery gather many
Group discharge current, the first temperature and the value of the second temperature, according to the relation between discharge current and the first temperature
In the AC internal Resistance that draws battery, the direct current drawing battery according to the relation between discharge current and the second temperature
Hindering, the AC internal Resistance of battery and DC internal resistance need not separately test, but just can be same through once test
Time draw AC internal Resistance and the DC internal resistance of battery, test process is simple, and testing cost is low.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, the embodiment of the present invention will be retouched below
In stating, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only
Some embodiments of the present invention, for those of ordinary skill in the art, are not paying creative work
Under premise, it is also possible to content according to embodiments of the present invention and these accompanying drawings obtain other accompanying drawing.
Fig. 1 is the first enforcement of the method for testing of a kind of internal resistance of cell provided in the specific embodiment of the invention
The method flow diagram of example.
Fig. 2 is the second enforcement of the method for testing of a kind of internal resistance of cell provided in the specific embodiment of the invention
The method flow diagram of example.
Fig. 3 is the coordinate diagram of the test case one of the internal resistance of cell.
Fig. 4 is the coordinate diagram of the test case two of the internal resistance of cell.
Fig. 5 is the structure square frame of the test system of a kind of internal resistance of cell provided in the specific embodiment of the invention
Figure.
Detailed description of the invention
Technical scheme and the technique effect reached for making to present invention solves the technical problem that, using are clearer,
Below in conjunction with accompanying drawing, the technical scheme of the embodiment of the present invention is described in further detail, it is clear that retouched
The embodiment stated is only a part of embodiment of the present invention rather than whole embodiments.Based in the present invention
Embodiment, the every other reality that those skilled in the art are obtained under not making creative work premise
Execute example, broadly fall into the scope of protection of the invention.
Refer to Fig. 1, it is the method for testing of a kind of internal resistance of cell provided in the specific embodiment of the invention
The method flow diagram of first embodiment.As it can be seen, the method includes:
Step S101: under different multiplying discharge scenario, gathers battery in the case of each multiplying power discharging respectively
Discharge current, the first temperature and the second temperature；Described first temperature is that battery electric quantity arrives described battery
The battery battery core head temperature in total electricity 50% moment, described second temperature is that battery electric quantity arrives described battery
The battery battery core head temperature in preset minimum electricity moment.
Different multiplying discharge scenario is the situation of the discharge current of different multiplying；In the case of a kind of multiplying power discharging
Battery discharges, corresponding discharge current in the case of recording this multiplying power discharging；During battery discharge,
Battery core head is measured when the moment that the electricity of battery is the total electricity of battery 50% (i.e. battery discharge is to half)
Temperature, obtains the first temperature, records the first temperature；When the preset minimum electricity that electricity is battery of battery
Carve (i.e. complete or battery the electricity of battery discharge is low cutoff voltage value) and measure the temperature of battery core head,
Obtain the second temperature, record the second temperature.In this manner, gather and record multiple multiplying power discharging situation
Under discharge current, the first temperature and the second temperature.
Step S102: obtain AC internal Resistance straight line according to described discharge current and described first temperature；According to institute
State discharge current and described second temperature obtains DC internal resistance straight line.
AC internal Resistance straight line is obtained according to described discharge current and described first temperature, including: with discharge current
It is that vertical coordinate creates the first coordinate diagram for abscissa, temperature；By the institute in the case of each multiplying power discharging described
The scatterplot stating discharge current and described first temperature composition is plotted in described first coordinate diagram, described in matching the
Scatterplot in one coordinate diagram, obtains AC internal Resistance straight line.Discharge current in the case of each multiplying power discharging and
First temperature all forms the scatterplot of (discharge current, the first temperature), putting of different multiplying discharge scenario
Electricity electric current and the first temperature constitute multiple (discharge current, the first temperature) scatterplot, these scatterplot are all painted
System, in the first coordinate diagram, then obtains AC internal Resistance straight line according to one-variable linear regression principle so that these dissipate
Point is minimum to the fore-and-aft distance sum of this AC internal Resistance straight line.
DC internal resistance straight line is obtained according to described discharge current and described second temperature, including: with discharge current
It is that vertical coordinate creates the second coordinate diagram for abscissa, temperature；By the institute in the case of each multiplying power discharging described
The scatterplot stating discharge current and described second temperature composition is plotted in described second coordinate diagram, described in matching the
Scatterplot in two coordinate diagram, obtains DC internal resistance straight line.Discharge current in the case of each multiplying power discharging and
Second temperature all forms the scatterplot of (discharge current, the second temperature), putting of different multiplying discharge scenario
Electricity electric current and the first temperature constitute multiple (discharge current, the second temperature) scatterplot, these scatterplot are all painted
System, in the second coordinate diagram, then obtains DC internal resistance straight line according to one-variable linear regression principle and makes these scatterplot
Minimum to the fore-and-aft distance sum of this DC internal resistance straight line.
Wherein, the first coordinate diagram and the second coordinate diagram can be coordinate diagram, (discharge current, the first temperature)
Scatterplot and (discharge current, the second temperature) scatterplot can all be plotted in this coordinate diagram, according to unitary line
Property Regression respectively matching (discharge current, the first temperature) scatterplot and (discharge current, the second temperature)
Scatterplot, obtains AC internal Resistance straight line and DC internal resistance straight line.
Step S103: calculate the AC internal Resistance of described battery according to described AC internal Resistance straight line；According to described directly
Stream internal resistance straight line calculates the DC internal resistance of described battery.
The AC internal Resistance of described battery is calculated according to described AC internal Resistance straight line, including: calculate in described exchange
The slope of resistance straight line；The slope of described AC internal Resistance straight line is multiplied by pre-set factory and obtains the exchange of described battery
The value of internal resistance.
The DC internal resistance of described battery is calculated according to described DC internal resistance straight line, including: calculate in described direct current
The slope of resistance straight line；The slope of described DC internal resistance straight line is multiplied by pre-set factory and obtains the direct current of described battery
The value of internal resistance.
Alternatively, pre-set factory is 10；AC internal Resistance is: the slope of described AC internal Resistance straight line is multiplied by 10,
Unit is milliohm；DC internal resistance is: the slope of described DC internal resistance straight line is multiplied by 10, and unit is milliohm.
In sum, the embodiment of the present invention, by under different multiplying discharge scenario, gathers each times respectively
The discharge current of battery, the first temperature and the second temperature under rate discharge scenario；Described first temperature is battery electricity
Amount arrives the battery battery core head temperature in total electricity 50% moment of described battery, and described second temperature is battery
Electricity arrives the battery battery core head temperature in the preset minimum electricity moment of described battery；According to described electric discharge electricity
Stream and described first temperature obtain AC internal Resistance straight line；Obtain according to described discharge current and described second temperature
DC internal resistance straight line；The AC internal Resistance of described battery is calculated according to described AC internal Resistance straight line；According to described directly
Stream internal resistance straight line calculates the DC internal resistance of described battery.In the discharge process of battery gather organize more discharge current,
First temperature and the value of the second temperature, draw the friendship of battery according to the relation between discharge current and the first temperature
Stream internal resistance, draw the DC internal resistance of battery according to the relation between discharge current and the second temperature, the friendship of battery
Stream internal resistance and DC internal resistance need not separately test, but just can draw battery through once test simultaneously
AC internal Resistance and DC internal resistance, test process is simple, and testing cost is low.
Refer to Fig. 2, it is the method for testing of a kind of internal resistance of cell provided in the specific embodiment of the invention
The method flow diagram of the second embodiment.As it can be seen, the method includes:
Step S201: under different multiplying discharge scenario, gathers battery in the case of each multiplying power discharging respectively
Discharge current, the first temperature and the second temperature；Described first temperature is that battery electric quantity arrives described battery
The battery battery core head temperature in total electricity 50% moment, described second temperature is that battery electric quantity arrives described battery
The battery battery core head temperature in preset minimum electricity moment.
Alternatively, battery is high power type ternary cylinder 18650 series battery or high-energy type ternary cylinder
18650 series batteries.
Different multiplying discharge scenario is by tester's sets itself, and alternatively, different multiplying includes: 1 times, 2.5
Again, 5 times, 7.5 times, 10 times, 12.5 times and 15 times.
Step S202: obtain AC internal Resistance straight line according to described discharge current and described first temperature；According to institute
State discharge current and described second temperature obtains DC internal resistance straight line.
Step S203: calculate the slope of described AC internal Resistance straight line；The slope of described AC internal Resistance straight line is taken advantage of
The value of the AC internal Resistance of described battery is obtained with pre-set factory；Calculate the slope of described DC internal resistance straight line；Will
The slope of described DC internal resistance straight line is multiplied by the value that pre-set factory obtains the DC internal resistance of described battery.
Alternatively, pre-set factory is 10；AC internal Resistance is: the slope of described AC internal Resistance straight line is multiplied by 10,
Unit is milliohm；DC internal resistance is: the slope of described DC internal resistance straight line is multiplied by 10, and unit is milliohm
(mΩ)。
The test case of two internal resistances of cell is given below to further illustrate the survey of a kind of internal resistance of cell of this programme
Method for testing.
Test case one:
The test battery selected in this example is high power type ternary cylinder 18650 series battery, the appearance of battery
Amount is 2.0Ah (ampere-hour, ampere-hour), and the standard AC internal resistance of this test battery is 13.2 milliohms
Nurse, the standard DC internal resistance of this test battery is 22.8 milliohms.The test side of existing battery AC internal Resistance
Method is to be stored in the environment of reaching requirement of experiment more than 4 hours by battery, is 1 kilo hertz of magnetic (KHz) by frequency
The positive and negative electrode of voltage internal resistance test device contact the positive and negative electrode of battery respectively, read the AC internal Resistance of battery
Reading, the AC internal Resistance of this test battery recorded is 13.4 milliohms (m Ω).In existing battery DC
The method of testing of resistance is battery to be put into new prestige charge-discharge test cabinet tested by pulsed discharge, records
The DC internal resistance of this test battery is 22.5 milliohms (m Ω).
The discharge current of one group of different multiplying discharge scenario of collection, the first temperature when table 1 is this battery testing
With the second temperature；Fig. 3 is obtained by data matching (one-variable linear regression principle) according to the data in table 1
In DC internal resistance straight line (straight line A) and AC internal Resistance straight line (straight line B).
| Multiplying power discharging electric current/C | Discharge current/A | First temperature | Second temperature |
| 1 | 2 | 25.6 | 27.9 |
| 2.5 | 5 | 29.1 | 31.7 |
| 5 | 10 | 37.4 | 43.4 |
| 7.5 | 15 | 42.5 | 56.5 |
| 10 | 20 | 49.4 | 70.2 |
| 12.5 | 25 | 56.1 | 81.3 |
| 15 | 30 | 61.8 | 88.1 |
Table 1
As shown in Table 1, different multiplying includes: 1 times, 2.5 times, 5 times, 7.5 times, 10 times, 12.5 times
With 15 times.The scatterplot of (discharge current, the first temperature) is: (2,25.6), (5,29.1), (10,37.4),
(15,42.5), (20,49.4), (25,56.1) and (30,61.8)；(discharge current, the second temperature)
Scatterplot be: (2,27.9), (5,31.7), (10,43.4), (15,56.5), (20,70.2), (25,81.3)
(30,88.1).(straight according to the DC internal resistance straight line (straight line A) in table 1 and Fig. 3 and AC internal Resistance straight line
Line B), the slope calculating straight line A is 2.292, and the slope calculating straight line B is 1.302, then the direct current of battery
Internal resistance is 2.292*10m Ω=22.92m Ω, and the AC internal Resistance of battery is 1.302*10m Ω=13.02m Ω.This
The DC internal resistance of the battery that embodiment records relative to the error of the value of the standard DC internal resistance of battery less than 2%,
The value of the AC internal Resistance of the battery that the AC internal Resistance of the battery that the present embodiment records records relative to existing method
Error is less than 1%, and the low precision of the internal resistance of cell measured with existing technology is few, shows that the present embodiment is surveyed
The AC internal Resistance of battery and the correctness of D.C. resistance and high accuracy.
Test case two:
The test battery selected in this example is high-energy type ternary cylinder 18650 series battery, the appearance of battery
Amount is 2.2Ah, and the standard AC internal resistance of this test battery is 26.6 milliohms, the standard straight of this test battery
Stream internal resistance is 42.5 milliohms.The method of testing of existing battery AC internal Resistance be by battery reach experiment want
In the environment of asking store more than 4 hours, with the voltage internal resistance test device that frequency is 1 kilo hertz of magnetic (KHz) just,
Negative pole contacts the positive and negative electrode of battery respectively, reads the AC internal Resistance reading of battery, this test battery recorded
AC internal Resistance be 26.2 milliohms (m Ω).The method of testing of existing battery DC internal resistance is to be put by battery
Entering new prestige charge-discharge test cabinet to be tested by pulsed discharge, the DC internal resistance of this test battery recorded is
42.9 milliohms (m Ω).
The discharge current of one group of different multiplying discharge scenario of collection, the first temperature when table 2 is this battery testing
With the second temperature；Fig. 4 is obtained by data matching (one-variable linear regression principle) according to the data in table 2
In DC internal resistance straight line (straight line C) and AC internal Resistance straight line (straight line D).
Table 2
As shown in Table 2, different multiplying includes: 1 times, 2 times, 3 times, 4.65 times and 7 times.(electric discharge electricity
Stream, the first temperature) scatterplot be: (2.15,29.6), (4.3,35.1), (6.45,40.6), (10,48.8)
(15,64.6)；The scatterplot of (discharge current, the second temperature) is: (2.15,31.8), (4.3,38.6),
(6.45,46.4), (10,63.3) and (15,85.3).According to the DC internal resistance straight line in table 2 and Fig. 4
(straight line C) and AC internal Resistance straight line (straight line D), the slope calculating straight line C is 4.240, calculates straight line D
Slope be 2.691, then the DC internal resistance of battery is 4.240*10m Ω=42.40m Ω, in the exchange of battery
Resistance is 2.691*10m Ω=26.91m Ω.The DC internal resistance of the battery that the present embodiment records is relative to the mark of battery
The error of the value of quasi-DC internal resistance is less than 2%, and the AC internal Resistance of the battery that the present embodiment records is relative to existing side
The error of the value of the AC internal Resistance of the battery that method records less than 1%, the internal resistance of cell measured with existing technology
Precision slightly higher, show the AC internal Resistance of battery that the present embodiment records and the correctness of D.C. resistance and high
Accuracy.
In sum, the embodiment of the present invention gathers in the discharge process of battery and organizes discharge current, the first temperature more
Degree and the value of the second temperature, according to the relation between discharge current and the first temperature draw battery AC internal Resistance,
The DC internal resistance of battery is drawn according to the relation between discharge current and the second temperature；The embodiment of the present invention records
The internal resistance of cell precision measured with existing technology of the internal resistance of cell suitable, the value of the internal resistance of cell of measurement
Accuracy high, and the AC internal Resistance of the battery in the embodiment of the present invention and DC internal resistance need not separately survey
Examination, just can draw AC internal Resistance and the DC internal resistance of battery through once test simultaneously, and test process is simple,
Testing cost is low.
It is below the embodiment of the test system of a kind of internal resistance of cell of this programme, the test system of a kind of internal resistance of cell
The embodiment of the embodiment method of testing based on a kind of internal resistance of cell of system realizes, in the survey of a kind of internal resistance of cell
Description the most most in the embodiment of test system, refer to the embodiment of the method for testing of a kind of internal resistance of cell.
Refer to Fig. 5, it is the test system of a kind of internal resistance of cell provided in the specific embodiment of the invention
Block diagram.As it can be seen, this system includes:
Collecting unit 510, under different multiplying discharge scenario, gathers electricity in the case of each multiplying power discharging respectively
The discharge current in pond, the first temperature and the second temperature；Described first temperature is that battery electric quantity arrives described battery
The battery battery core head temperature in total electricity 50% moment, described second temperature is that battery electric quantity arrives described electricity
The battery battery core head temperature in the preset minimum electricity moment in pond.
Alternatively, battery is high power type ternary cylinder 18650 series battery or high-energy type ternary cylinder
18650 series batteries；Different multiplying includes: 1 times, 2.5 times, 5 times, 7.5 times, 10 times, 12.5 times
With 15 times.
Obtain unit 520, obtain AC internal Resistance straight line according to described discharge current and described first temperature；According to
Described discharge current and described second temperature obtain DC internal resistance straight line.
AC internal Resistance straight line is obtained according to described discharge current and described first temperature, including: with discharge current
It is that vertical coordinate creates the first coordinate diagram for abscissa, temperature；By the institute in the case of each multiplying power discharging described
The scatterplot stating discharge current and described first temperature composition is plotted in described first coordinate diagram, described in matching the
Scatterplot in one coordinate diagram, obtains AC internal Resistance straight line.
DC internal resistance straight line is obtained according to described discharge current and described second temperature, including: with discharge current
It is that vertical coordinate creates the second coordinate diagram for abscissa, temperature；By the institute in the case of each multiplying power discharging described
The scatterplot stating discharge current and described second temperature composition is plotted in described second coordinate diagram, described in matching the
Scatterplot in two coordinate diagram, obtains DC internal resistance straight line.
Computing unit 530, calculates the AC internal Resistance of described battery according to described AC internal Resistance straight line；According to described
DC internal resistance straight line calculates the DC internal resistance of described battery.
The AC internal Resistance of described battery is calculated according to described AC internal Resistance straight line, including: calculate in described exchange
The slope of resistance straight line；The slope of described AC internal Resistance straight line is multiplied by pre-set factory and obtains the exchange of described battery
The value of internal resistance.
The DC internal resistance of described battery is calculated according to described DC internal resistance straight line, including: calculate in described direct current
The slope of resistance straight line；The slope of described DC internal resistance straight line is multiplied by pre-set factory and obtains the direct current of described battery
The value of internal resistance.
Alternatively, pre-set factory is 10；AC internal Resistance is: the slope of AC internal Resistance straight line is multiplied by 10, unit
For milliohm；DC internal resistance is: the slope of DC internal resistance straight line is multiplied by 10, and unit is milliohm.
In sum, each unit module cooperative works, collecting unit 510, under different multiplying discharge scenario,
Gather the discharge current of battery in the case of each multiplying power discharging, the first temperature and the second temperature respectively；Described
First temperature is the battery battery core head temperature that battery electric quantity arrives total electricity 50% moment of described battery, described
Second temperature is the battery battery core head temperature that battery electric quantity arrives the preset minimum electricity moment of described battery；
Obtain unit 520, obtain AC internal Resistance straight line according to described discharge current and described first temperature；According to described
Discharge current and described second temperature obtain DC internal resistance straight line；Computing unit 530, according to described AC internal Resistance
Straight line calculates the AC internal Resistance of described battery；Calculate according to described DC internal resistance straight line in the direct current of described battery
Resistance.The discharge process of battery gathers and organizes discharge current, the first temperature and the value of the second temperature more, according to
Relation between discharge current and the first temperature draws the AC internal Resistance of battery, according to discharge current and the second temperature
Relation between degree draws the DC internal resistance of battery, and the AC internal Resistance of battery and DC internal resistance need not separately survey
Examination, but just can draw AC internal Resistance and the DC internal resistance of battery through once test simultaneously；And record
The internal resistance of cell precision measured with existing technology of the internal resistance of cell is suitable, the value of the internal resistance of cell of measurement
Accuracy is high, and test process is simple, and testing cost is low.
The know-why of the present invention is described above in association with specific embodiment.These describe and are intended merely to explain this
The principle of invention, and limiting the scope of the invention can not be construed to by any way.Based on herein
Explaining, those skilled in the art need not pay performing creative labour can associate other tool of the present invention
Body embodiment, within these modes fall within protection scope of the present invention.
Claims (10)
1. the method for testing of an internal resistance of cell, it is characterised in that including:
Under different multiplying discharge scenario, gather respectively the discharge current of battery in the case of each multiplying power discharging,
First temperature and the second temperature；When described first temperature is total electricity 50% that battery electric quantity arrives described battery
The battery battery core head temperature carved, described second temperature is the preset minimum electricity that battery electric quantity arrives described battery
The battery battery core head temperature in amount moment；
AC internal Resistance straight line is obtained according to described discharge current and described first temperature；According to described discharge current
DC internal resistance straight line is obtained with described second temperature；
The AC internal Resistance of described battery is calculated according to described AC internal Resistance straight line；According to described DC internal resistance straight line
Calculate the DC internal resistance of described battery.
Method of testing the most according to claim 1, it is characterised in that described according to described discharge current
AC internal Resistance straight line is obtained with described first temperature, including:
With discharge current as abscissa, temperature create the first coordinate diagram for vertical coordinate；
By the described discharge current in the case of each multiplying power discharging described and the scatterplot of described first temperature composition
It is plotted in described first coordinate diagram, the scatterplot in the first coordinate diagram described in matching, obtains AC internal Resistance straight line.
Method of testing the most according to claim 1, it is characterised in that described according to described discharge current
DC internal resistance straight line is obtained with described second temperature, including:
With discharge current as abscissa, temperature create the second coordinate diagram for vertical coordinate；
By the described discharge current in the case of each multiplying power discharging described and the scatterplot of described second temperature composition
It is plotted in described second coordinate diagram, the scatterplot in the second coordinate diagram described in matching, obtains DC internal resistance straight line.
Method of testing the most according to claim 1, it is characterised in that described according to described AC internal Resistance
Straight line calculates the AC internal Resistance of described battery, including:
Calculate the slope of described AC internal Resistance straight line；The slope of described AC internal Resistance straight line is multiplied by pre-set factory
Obtain the value of the AC internal Resistance of described battery；
The described DC internal resistance calculating described battery according to described DC internal resistance straight line, including:
Calculate the slope of described DC internal resistance straight line；The slope of described DC internal resistance straight line is multiplied by pre-set factory
Obtain the value of the DC internal resistance of described battery.
Method of testing the most according to claim 4, it is characterised in that described pre-set factory is 10；
Described AC internal Resistance is: the slope of described AC internal Resistance straight line is multiplied by 10, and unit is milliohm；
Described DC internal resistance is: the slope of described DC internal resistance straight line is multiplied by 10, and unit is milliohm.
Method of testing the most according to claim 1, it is characterised in that described battery is high power type three
Unit's cylinder 18650 series battery or high-energy type ternary cylinder 18650 series battery；
Described different multiplying includes: 1 times, 2.5 times, 5 times, 7.5 times, 10 times, 12.5 times and 15 times.
7. the test system of an internal resistance of cell, it is characterised in that including:
Collecting unit, under different multiplying discharge scenario, gathers battery in the case of each multiplying power discharging respectively
Discharge current, the first temperature and the second temperature；Described first temperature is that battery electric quantity arrives described battery
The battery battery core head temperature in total electricity 50% moment, described second temperature is that battery electric quantity arrives described battery
The battery battery core head temperature in preset minimum electricity moment；
Obtain unit, obtain AC internal Resistance straight line according to described discharge current and described first temperature；According to institute
State discharge current and described second temperature obtains DC internal resistance straight line；
Computing unit, calculates the AC internal Resistance of described battery according to described AC internal Resistance straight line；According to described directly
Stream internal resistance straight line calculates the DC internal resistance of described battery.
Test system the most according to claim 7, it is characterised in that described according to described discharge current
AC internal Resistance straight line is obtained with described first temperature, including:
With discharge current as abscissa, temperature create the first coordinate diagram for vertical coordinate；
By the described discharge current in the case of each multiplying power discharging described and the scatterplot of described first temperature composition
It is plotted in described first coordinate diagram, the scatterplot in the first coordinate diagram described in matching, obtains AC internal Resistance straight line；
Described obtain DC internal resistance straight line according to described discharge current and described second temperature, including:
With discharge current as abscissa, temperature create the second coordinate diagram for vertical coordinate；
By the described discharge current in the case of each multiplying power discharging described and the scatterplot of described second temperature composition
It is plotted in described second coordinate diagram, the scatterplot in the second coordinate diagram described in matching, obtains DC internal resistance straight line.
Test system the most according to claim 7, it is characterised in that described according to described AC internal Resistance
Straight line calculates the AC internal Resistance of described battery, including:
Calculate the slope of described AC internal Resistance straight line；The slope of described AC internal Resistance straight line is multiplied by pre-set factory
Obtain the value of the AC internal Resistance of described battery；
Described according to described DC internal resistance straight line calculate described battery DC internal resistance, including: calculate described directly
The slope of stream internal resistance straight line；The slope of described DC internal resistance straight line is multiplied by pre-set factory and obtains described battery
The value of DC internal resistance；
Described pre-set factory is 10；Described AC internal Resistance is: the slope of described AC internal Resistance straight line is multiplied by 10,
Unit is milliohm；Described DC internal resistance is: the slope of described DC internal resistance straight line is multiplied by 10, and unit is milli
Ohm.
Test system the most according to claim 7, it is characterised in that described battery is high power type three
Unit's cylinder 18650 series battery or high-energy type ternary cylinder 18650 series battery；
Described different multiplying includes: 1 times, 2.5 times, 5 times, 7.5 times, 10 times, 12.5 times and 15 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610529598.2A CN105938161B (en) | 2016-07-06 | 2016-07-06 | A kind of test method and system of the internal resistance of cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610529598.2A CN105938161B (en) | 2016-07-06 | 2016-07-06 | A kind of test method and system of the internal resistance of cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105938161A true CN105938161A (en) | 2016-09-14 |
| CN105938161B CN105938161B (en) | 2018-09-04 |
Family
ID=56872381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610529598.2A Active CN105938161B (en) | 2016-07-06 | 2016-07-06 | A kind of test method and system of the internal resistance of cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105938161B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107843442A (en) * | 2017-12-07 | 2018-03-27 | 汽-大众汽车有限公司 | A kind of measurement apparatus and method for trafficability when verifying static state |
| CN108919125A (en) * | 2018-04-03 | 2018-11-30 | 苏州精控能源科技有限公司 | Internal resistance of cell detection method and device |
| CN109856557A (en) * | 2019-01-21 | 2019-06-07 | 合肥国轩高科动力能源有限公司 | On-line monitoring lithium ion battery electrochemical impedance test method |
| CN111999667A (en) * | 2020-08-21 | 2020-11-27 | 惠州亿纬锂能股份有限公司 | Method for evaluating internal resistance of battery |
| CN112748348A (en) * | 2020-12-04 | 2021-05-04 | 欣旺达电动汽车电池有限公司 | Battery low-temperature performance distribution level detection method and system and storage medium |
| CN115993552A (en) * | 2023-03-23 | 2023-04-21 | 杭州科工电子科技有限公司 | Method for estimating internal resistance of battery |
| CN116027159A (en) * | 2023-01-30 | 2023-04-28 | 宁波群芯微电子股份有限公司 | Optocoupler voltage-resistant quality control method and optocoupler voltage-resistant test circuit |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012013554A (en) * | 2010-06-30 | 2012-01-19 | Sanyo Electric Co Ltd | Detection method for internal resistance of battery |
| CN102393508A (en) * | 2011-09-30 | 2012-03-28 | 湖南大学 | Nondestructive diagnosis of battery performance |
| CN102955134A (en) * | 2012-10-27 | 2013-03-06 | 埃斯倍风电科技(青岛)有限公司 | Online detection method and device for health status of storage battery |
| CN103134987A (en) * | 2013-01-25 | 2013-06-05 | 文创太阳能(福建)科技有限公司 | Battery internal resistance state test method based on battery electrode heat effects |
| JP2013228216A (en) * | 2012-04-24 | 2013-11-07 | Yokogawa Electric Corp | Battery dc resistance evaluation device |
| CN103884991A (en) * | 2013-12-17 | 2014-06-25 | 惠州市亿能电子有限公司 | Test method for single body cell DC internal resistance |
| CN104330636A (en) * | 2014-11-19 | 2015-02-04 | 天津力神电池股份有限公司 | Method for inferring internal DC resistance of lithium ion battery |
-
2016
- 2016-07-06 CN CN201610529598.2A patent/CN105938161B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012013554A (en) * | 2010-06-30 | 2012-01-19 | Sanyo Electric Co Ltd | Detection method for internal resistance of battery |
| CN102393508A (en) * | 2011-09-30 | 2012-03-28 | 湖南大学 | Nondestructive diagnosis of battery performance |
| JP2013228216A (en) * | 2012-04-24 | 2013-11-07 | Yokogawa Electric Corp | Battery dc resistance evaluation device |
| CN102955134A (en) * | 2012-10-27 | 2013-03-06 | 埃斯倍风电科技(青岛)有限公司 | Online detection method and device for health status of storage battery |
| CN103134987A (en) * | 2013-01-25 | 2013-06-05 | 文创太阳能(福建)科技有限公司 | Battery internal resistance state test method based on battery electrode heat effects |
| CN103884991A (en) * | 2013-12-17 | 2014-06-25 | 惠州市亿能电子有限公司 | Test method for single body cell DC internal resistance |
| CN104330636A (en) * | 2014-11-19 | 2015-02-04 | 天津力神电池股份有限公司 | Method for inferring internal DC resistance of lithium ion battery |
Non-Patent Citations (2)
| Title |
|---|
| 徐晓东等: ""锂离子电池内阻测试方法研究"", 《中国测试》 * |
| 朱顺良等: ""不同工况环境下动力锂电池内阻测试研究"", 《新能源汽车》 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107843442A (en) * | 2017-12-07 | 2018-03-27 | 汽-大众汽车有限公司 | A kind of measurement apparatus and method for trafficability when verifying static state |
| CN108919125A (en) * | 2018-04-03 | 2018-11-30 | 苏州精控能源科技有限公司 | Internal resistance of cell detection method and device |
| CN109856557A (en) * | 2019-01-21 | 2019-06-07 | 合肥国轩高科动力能源有限公司 | On-line monitoring lithium ion battery electrochemical impedance test method |
| CN109856557B (en) * | 2019-01-21 | 2021-07-13 | 合肥国轩高科动力能源有限公司 | On-line monitoring lithium ion battery electrochemical impedance test method |
| CN111999667A (en) * | 2020-08-21 | 2020-11-27 | 惠州亿纬锂能股份有限公司 | Method for evaluating internal resistance of battery |
| CN111999667B (en) * | 2020-08-21 | 2023-05-30 | 惠州亿纬锂能股份有限公司 | Evaluation method of internal resistance of battery |
| CN112748348A (en) * | 2020-12-04 | 2021-05-04 | 欣旺达电动汽车电池有限公司 | Battery low-temperature performance distribution level detection method and system and storage medium |
| CN112748348B (en) * | 2020-12-04 | 2023-03-10 | 欣旺达电动汽车电池有限公司 | Battery low-temperature performance distribution level detection method and system and storage medium |
| CN116027159A (en) * | 2023-01-30 | 2023-04-28 | 宁波群芯微电子股份有限公司 | Optocoupler voltage-resistant quality control method and optocoupler voltage-resistant test circuit |
| CN116027159B (en) * | 2023-01-30 | 2023-08-25 | 宁波群芯微电子股份有限公司 | Optocoupler voltage-resistant quality control method and optocoupler voltage-resistant test circuit |
| CN115993552A (en) * | 2023-03-23 | 2023-04-21 | 杭州科工电子科技有限公司 | Method for estimating internal resistance of battery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105938161B (en) | 2018-09-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105938161A (en) | Battery internal resistance test method and system | |
| CN105068009B (en) | Battery cycle life Forecasting Methodology | |
| CN107658511B (en) | Power lithium battery combination method and dynamic lithium battery method for group matching | |
| CN106716158B (en) | Battery charge state evaluation method and device | |
| CN104656023B (en) | A kind of method and system for evaluating battery cell uniformity | |
| CN108306065A (en) | Lithium ion battery grouping method and lithium ion battery combo system | |
| CN105903692A (en) | Lithium ion battery consistency screening method | |
| CN107340492A (en) | Electric power meter failure analysis methods with scene anticipation are excavated based on big data | |
| CN101515022B (en) | Method for evaluating consistency of batteries | |
| CN102183730A (en) | Battery diagnosis device and method | |
| CN103197251A (en) | Identification method of second order resistance and capacitance (RC) equivalent model of power lithium battery | |
| CN102879743B (en) | Lithium ion battery residual electric quantity real-time analysis computing method | |
| CN109444800B (en) | Station area identification method based on wireless communication acquisition | |
| CN112051512B (en) | Echelon utilization sorting method and energy storage system | |
| CN107037375B (en) | Method and device for measuring direct current internal resistance of battery | |
| WO2016106501A1 (en) | Equivalent circuit model of battery | |
| CN103616551B (en) | The terminal and cell voltage acquisition methods of cell voltage can be accurately obtained when charging | |
| Leal et al. | Distribution transformer losses evaluation: A new analytical methodology and artificial neural network approach | |
| CN107505575B (en) | Rapid assessment method for retired power battery | |
| CN107064808B (en) | The SOC estimation method and device of battery | |
| CN103633705B (en) | Accurately obtained terminal and the method for cell voltage by discharge mode when charging | |
| CN106602626A (en) | Method and system for processing battery data | |
| CN103901353A (en) | Method for judging uniformity of all batteries of lithium ion battery pack and timing voltage measuring instrument | |
| Xiao et al. | Discharge curve-based formation of retired power batteries for secondary use | |
| CN102393509A (en) | Nondestructive evaluation method for performance of lithium ion battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190530 Address after: Room 701, Doctoral Building, 419 Longjing Avenue, Longjing District, Jingmen High-tech Zone, Hubei Province Patentee after: Jingmen Yiwei Lithium Battery Co., Ltd. Address before: 516006 No. 36 Huifeng Road, Zhongkai High-tech Zone, Huizhou City, Guangdong Province Patentee before: Huizhou EVE Energy Co., Ltd. |