CN108896951A - Undesirable detection method and detection system are crimped in a kind of test of battery charging and discharging - Google Patents
Undesirable detection method and detection system are crimped in a kind of test of battery charging and discharging Download PDFInfo
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- CN108896951A CN108896951A CN201810810509.0A CN201810810509A CN108896951A CN 108896951 A CN108896951 A CN 108896951A CN 201810810509 A CN201810810509 A CN 201810810509A CN 108896951 A CN108896951 A CN 108896951A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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Abstract
The invention discloses undesirable detection method and detection system is crimped in a kind of test of battery charging and discharging, detection method includes：Start battery charging and discharging test technology, measures the port output voltage of charging/discharging apparatus and the tab voltage of battery；It calculates instantaneously crimping impedance and averagely crimps impedance, and calculate instantaneous the first difference for crimping impedance and averagely crimping impedance, and instantaneous crimping impedance crimps the second difference of impedance with recursive average；Summation is weighted to the first difference and the second difference, obtains weighted difference, and weighted difference is compared with threshold value；When weighted difference is greater than threshold value, then judge that battery crimping is bad, starts the preset bad safeguard measure of crimping.The present invention is measured by the port output voltage of battery pole ear voltage and charging/discharging apparatus in testing battery charging and discharging; and the calculating of crimping impedance is carried out compared with; it can judge whether that generation crimping is bad, more accurately to start the bad safeguard measure of crimping in time.
Description
Technical field
The present invention relates to battery charging and discharging technical fields, and in particular to crimps undesirable inspection in a kind of test of battery charging and discharging
Survey method and detection system.
Background technique
In charging and discharging lithium battery test process, need to do the voltage of battery pole ear measurement in real time and monitoring.Battery
State-of-charge, work step are jumped condition, battery internal defect etc. and require just be done based on real-time and accurate battery voltage sampling
Judge out.Voltage sample will lead to the super-charge super-discharge of tested battery extremely, cause the security risk of thermal runaway.
It is abnormal for placing battery voltage sample, in the prior art, using twin voltage sample circuit come the voltage to battery into
Row measurement.In difference that can by comparing between primary channel sample voltage and accessory channel sampled voltage in twin voltage sample circuit
Value come judge route crimp situation.But in twin voltage sample circuit, charging/discharging apparatus output port and each battery clamp
Between connecting line length, the difference of material, the enchancement factors such as the difference of impedance are crimped between battery clamp and battery pole ear all
It has seriously affected battery and has crimped undesirable judgement, the accuracy of the bad judgement of crimping reduced.
Therefore, the existing technology needs to be improved and developed.
Summary of the invention
The technical problem to be solved in the present invention is that in view of the above drawbacks of the prior art, providing a kind of battery charging and discharging
Undesirable detection method and detection system are crimped in test, it is intended to solve judgement undesirable for battery crimping in the prior art not
Accurate problem.
The technical proposal for solving the technical problem of the invention is as follows：
Undesirable detection method is crimped in a kind of test of battery charging and discharging, wherein the detection method includes：
Step A, start battery charging and discharging test technology, control the port of preset twin voltage sample circuit measurement charging/discharging apparatus
The tab voltage of output voltage and battery；
Step B, detection terminal is according to the port output voltage and battery pole ear voltage of measurement, calculate instantaneous crimping impedance and
Averagely crimping impedance, and the first difference for calculating instantaneous crimping impedance and averagely crimping impedance, and instantaneously crimp impedance and pass
Return the second difference of average crimping impedance；
Step C, summation is weighted to first difference and the second difference, acquisition weighted difference, and by the weighted difference
It is compared with preset threshold value；
Step D, when the weighted difference is greater than the threshold value, then judge that battery crimping is bad, and start preset crimping not
Good safeguard measure.
Undesirable detection method is crimped in the battery charging and discharging test, wherein the method also includes：
Step E, when the weighted difference is less than or equal to the threshold value, then averagely crimping impedance is iterated to calculate, and update
Observation window continues to execute charge-discharge test.
Undesirable detection method is crimped in the battery charging and discharging test, wherein the method also includes：
Step S1, battery is entered into charging/discharging apparatus in advance, the output channel of the tab of battery and charging/discharging apparatus is connected, and
The twin voltage sample circuit is connect with the port of battery pole ear and charging/discharging apparatus.
Undesirable detection method is crimped in the described battery charging and discharging test, wherein the twin voltage sample circuit includes
Main channel and secondary channels；
The main channel is crimped at the different location of battery pole ear by two voltage probes in parallel and measures battery pole ear electricity
Pressure；
The secondary channels are connect with the port of the charging/discharging apparatus, to measure the port output voltage of the charge and discharge point device.
Undesirable detection method is crimped in the battery charging and discharging test, wherein the method also includes：
Step S2, a threshold value is set in the detection terminal in advance, and the threshold value with weighted difference for being compared, to sentence
Whether breaking, it is bad to occur crimping.
Undesirable detection method is crimped in the described battery charging and discharging test, wherein the step A includes：
Step A1, after the output channel of the tab of battery and charging/discharging apparatus connects, start computer vision auxiliary positioning system
System positions the pallet of placing battery；
Step A2, start charge-discharge test technique, control press contacts battery pole ear under the press of charging/discharging apparatus；
Step A3, the port output voltage of charging/discharging apparatus and the tab voltage of battery are measured.
Undesirable detection method is crimped in the described battery charging and discharging test, wherein the step B includes：
Step B1, detection terminal calculates n-th crimping resistance in observation window according to the port output voltage and tab voltage of measurement
Anti- and averagely crimping impedance；
Step B2, the first difference for calculating n-th crimping impedance and averagely crimping impedance；
Step B3, the second difference that n-th crimping impedance crimps impedance with recursive average is calculated.
Undesirable detection system is crimped in a kind of test of battery charging and discharging, wherein the detection system includes：
For carrying out the charging/discharging apparatus of charge-discharge test to battery；
For measuring the twin voltage sample circuit of the port output voltage of the charging/discharging apparatus and the tab voltage of battery；
It is connect with the twin voltage sample circuit, and by the port output voltage to measurement and based on battery pole ear voltage carries out
It calculates, and judges whether to crimp undesirable detection terminal.
The detection terminal includes：
Computing module, for the port output voltage and battery pole ear voltage according to measurement, calculate instantaneous crimping impedance and
Averagely crimping impedance, and the first difference for calculating instantaneous crimping impedance and averagely crimping impedance, and instantaneously crimp impedance and pass
Return the second difference of average crimping impedance；
Comparison module obtains weighted difference, and described will add for being weighted summation to first difference and the second difference
Weighted error value is compared with preset threshold value；
Judgment module then judges that battery crimping is bad, and start preset crimping when the weighted difference is greater than the threshold value
Bad safeguard measure.
Undesirable detection system is crimped in the described battery charging and discharging test, wherein the twin voltage sample circuit includes
Main channel and secondary channels；
The main channel is crimped at the different location of battery pole ear by two voltage probes in parallel and measures battery pole ear electricity
Pressure；
The secondary channels are connect with the port of the charging/discharging apparatus, to measure the port output voltage of the charge and discharge point device.
Undesirable detection system is crimped in the battery charging and discharging test, wherein the tab of the battery and charge and discharge
The output channel of equipment connects；The twin voltage sample circuit is connect with the port of battery pole ear and charging/discharging apparatus.
Beneficial effects of the present invention：The present invention passes through battery pole ear voltage in testing battery charging and discharging and charge and discharge
The port output voltage of equipment measures, and the calculating for carrying out crimping impedance can more accurately judge whether compared with
It is bad that crimping occurs, to start the bad safeguard measure of crimping in time.
Detailed description of the invention
Fig. 1 is the flow chart that the preferred embodiment of undesirable detection method is crimped in battery charging and discharging test of the present invention.
Fig. 2 is flow chart when crimping the concrete application of undesirable detection method in battery charging and discharging test of the present invention.
Fig. 3 is the functional block diagram that undesirable detection system is crimped in battery charging and discharging test of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer and more explicit, right as follows in conjunction with drawings and embodiments
The present invention is further described.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and do not have to
It is of the invention in limiting.
In charging and discharging lithium battery test process, need to do the voltage of battery pole ear measurement in real time and monitoring.Battery
State-of-charge, work step are jumped condition, battery internal defect etc. and require just be done based on real-time and accurate battery voltage sampling
Judge out.Voltage sample will lead to the super-charge super-discharge of tested battery extremely, cause the security risk of thermal runaway.For placing battery electricity
Pressure sampling is abnormal, is measured in the prior art using twin voltage sample circuit to voltage, but twin voltage in the prior art
It is difficult to accurately bad judge battery crimping in sample circuit.To solve the above-mentioned problems, the present invention provides one
Undesirable detection method is crimped in kind battery charging and discharging test, as shown in Figure 1, the detection method specifically includes step：
Step S100, start battery charging and discharging test technology, control preset twin voltage sample circuit measurement charging/discharging apparatus
The tab voltage of port output voltage and battery；
Step S200, detection terminal calculates instantaneous crimping impedance according to the port output voltage and battery pole ear voltage of measurement
And averagely crimp impedance, and calculate instantaneous crimping impedance with averagely crimp the first difference of impedance, and instantaneously crimp impedance
The second difference of impedance is crimped with recursive average；
Step S300, summation is weighted to first difference and the second difference, acquisition weighted difference, and by the weighted difference
Value is compared with preset threshold value；
Step S400, when the weighted difference is greater than the threshold value, then judge that battery crimping is bad, and start preset crimping
Bad safeguard measure.
Electricity is exported to the tab voltage of battery and the port of charging/discharging apparatus using twin voltage sample circuit in the present invention
Pressure measures, and is calculated and analyzed according to the tab voltage and port output voltage measured, thus more accurate
Ground judges whether battery occurs crimping bad, raising judging nicety rate, to start the bad safeguard measure of crimping in time.
When it is implemented, either manually or automatically battery is entered charging/discharging apparatus to the present invention by fixture in advance, by battery
Tab and the output channel of charging/discharging apparatus connect, and by the tab and charging/discharging apparatus of twin voltage sample circuit and battery
Port connection, so as to when battery execute charge-discharge test when measurement battery tab voltage and charging/discharging apparatus port it is defeated
Voltage out.Specifically, the twin voltage sample circuit in the present embodiment includes main channel and secondary channels；The main channel passes through two
Only voltage probe in parallel is crimped on measurement battery pole ear voltage at the different location of battery pole ear；The secondary channels are filled with described
The port of discharge equipment connects, to measure the port output voltage of the charging/discharging apparatus.Since voltage probe is using more
Probe parallel institution can effectively increase the contact area of the tab of probe and battery.When any probe and battery pole ear
Normal crimping, can guarantee that voltage can be measured normally, and voltage probe is effectively reduced and crimps undesirable probability.
Preferably, 16 are provided on the main channel in the twin voltage sample circuit in the present embodiment and secondary channels
ADC analog-to-digital conversion module, by the analog-to-digital conversion of the ADC analog-to-digital conversion module, by main channel in twin voltage sample circuit with it is auxiliary
Modulus sampled signal in channel is converted to digital signal, obtains corresponding voltage.
Further, after battery pole ear is connect with charging/discharging apparatus, the charging/discharging apparatus starts computer vision
Aided positioning system carries out fine positioning to the pallet of placing battery, then starts charge-discharge test technique, controls charging/discharging apparatus
Press under press contacts battery pole ear, and then by twin voltage sample circuit to the port output voltage and electricity of charging/discharging apparatus
The tab voltage in pond measures.
After the tab voltage of the port output voltage and battery that measure charging/discharging apparatus, electricity is sampled with twin voltage
The test terminal of road connection will get the port output voltage and tab voltage.Terminal is detected according to the port of measurement
Output voltage and tab voltage calculate n-th in observation window and crimp impedance（Instantaneous crimping impedance）And impedance is averagely crimped,
The n-th crimps impedance：Rn= |Vo-Vm|/I, wherein VoFor the port output voltage of charging/discharging apparatus, VmFor battery
Tab voltage, I are charging and discharging currents.The averagely crimping impedance is Ra=∑Rw/ N, wherein Rw=[Rn-w, Rn-w+1, Rn-w+2...,
Rn], N is the number crimped in total.
Further, detection terminal calculates the first difference that n-th crimps impedance with averagely crimps impedance；And calculate the
N times crimping impedance crimps the second difference of impedance with recursive average.First difference is Δ1=| Rn - Ra|, described second
Difference is Δ2=| Rn - Rv|, wherein RvImpedance is crimped for recursive average.
Still further, the detection terminal calculates the weighted difference of the first difference and the second difference, the weighted difference
For Δ=β * Δ1+ (1-β)*Δ2 , wherein β is weight.After weighted difference has been calculated, by the weighted difference with set in advance
The threshold value set compares, and the threshold value is in advance in the detection terminal, for being compared with weighted difference, to judge
Whether appearance crimping is bad.Specifically, when the weighted difference is greater than the threshold value, then judge that battery crimping is bad, and open
The preset bad safeguard measure of crimping is moved, and adjusts battery in time.And when the weighted difference is less than or equal to the threshold value
When, then averagely crimping impedance is iterated to calculate, and update observation window, continues to execute charge-discharge test.
From this, the present invention by using twin voltage sample circuit simultaneously to the port output voltage of charging/discharging apparatus and
The tab voltage of battery measures, and can crimp bad be measured in real time to fixture exception, wiring exception and probe simultaneously
Monitoring.And the present invention, can be by connecting line material and length, fixture by calculating port output voltage and tab voltage
Quantify with enchancement factors such as tab contact impedances, the meeting at the relatively main channel of twin voltage sample circuit and accessory channel voltage difference
Line loss bring pressure difference is subtracted, to improve the accuracy for crimping bad judgement.
The present invention also provides the embodiments of the concrete application of the detection method, as shown in Fig. 2, specifically including following step
Suddenly：
Step 201, battery enter charging/discharging apparatus.
Step 202, starting computer vision aided positioning system position pallet.
The tab of press contacts battery under step 203, control press.
Step 204 calculates instantaneous crimping impedance and averagely crimps impedance.
Step 205 calculates instantaneous the first difference for crimping impedance and averagely crimping impedance；It calculates instantaneous crimping impedance and passs
Return the second difference of average crimping impedance, and calculates weighted difference.
Whether step 206, weighted difference are greater than threshold value.If so, thening follow the steps 207；If it is not, thening follow the steps 208.
Step 207 reports bad, the starting protection measure of crimping.
Step 208, the average crimping impedance for calculating the crimping of iteration n times, continue to execute charge-discharge test.
Based on the above embodiment, the present invention also provides undesirable detection system is crimped in a kind of test of battery charging and discharging, such as
Shown in Fig. 3, the detection system includes：For carrying out the charging/discharging apparatus 301 of charge-discharge test to battery；It is described for measuring
The twin voltage sample circuit 302 of the tab voltage of the port output voltage and battery of charging/discharging apparatus 301；With the twin voltage
Sample circuit 302 connects, and for calculating the port output voltage and battery pole ear voltage of measurement, and judges whether
Crimp undesirable detection terminal 303.The tab of the battery is connect with the output channel of charging/discharging apparatus 301；The twin voltage
Sample circuit 302 is connect with the port of battery pole ear and charging/discharging apparatus 301.
Preferably, the detection terminal 303 includes：
Computing module, for the port output voltage and battery pole ear voltage according to measurement, calculate instantaneous crimping impedance and
Averagely crimping impedance, and the first difference for calculating instantaneous crimping impedance and averagely crimping impedance, and instantaneously crimp impedance and pass
Return the second difference of average crimping impedance；
Comparison module obtains weighted difference, and described will add for being weighted summation to first difference and the second difference
Weighted error value is compared with preset threshold value；
Judgment module then judges that battery crimping is bad, and start preset crimping when the weighted difference is greater than the threshold value
Bad safeguard measure.
The twin voltage sample circuit 302 in the present embodiment includes main channel and secondary channels；The main channel passes through two
Only voltage probe in parallel is crimped on measurement battery pole ear voltage at the different location of battery pole ear；The secondary channels are filled with described
The port of discharge equipment connects, to measure the port output voltage of the charge and discharge point device.
In conclusion crimping undesirable detection method and detection system in a kind of battery charging and discharging test provided by the invention
System, detection method include：Start battery charging and discharging test technology, measures the port output voltage and battery of charging/discharging apparatus
Tab voltage；Calculate instantaneous crimping impedance and averagely crimp impedance, and calculate instantaneous crimping impedance with averagely crimp impedance
First difference, and instantaneous crimping impedance crimp the second difference of impedance with recursive average；To the first difference and the second difference into
Row weighted sum obtains weighted difference, and weighted difference is compared with threshold value；When weighted difference is greater than threshold value, then sentence
It is bad to power off pond crimping, the bad safeguard measure of starting crimping.The present invention passes through the battery pole ear electricity in testing battery charging and discharging
Pressure and the port output voltage of charging/discharging apparatus measure, and carry out the calculating of crimping impedance compared with, can be more quasi-
Judge whether that generation crimping is bad, really to start the bad safeguard measure of crimping in time.
It should be understood that the application of the present invention is not limited to the above for those of ordinary skills can
With improvement or transformation based on the above description, all these modifications and variations all should belong to the guarantor of appended claims of the present invention
Protect range.
Claims (10)
1. crimping undesirable detection method in a kind of test of battery charging and discharging, which is characterized in that the detection method includes：
Step A, start battery charging and discharging test technology, control the port of preset twin voltage sample circuit measurement charging/discharging apparatus
The tab voltage of output voltage and battery；
Step B, detection terminal is according to the port output voltage and battery pole ear voltage of measurement, calculate instantaneous crimping impedance and
Averagely crimping impedance, and the first difference for calculating instantaneous crimping impedance and averagely crimping impedance, and instantaneously crimp impedance and pass
Return the second difference of average crimping impedance；
Step C, summation is weighted to first difference and the second difference, acquisition weighted difference, and by the weighted difference
It is compared with preset threshold value；
Step D, when the weighted difference is greater than the threshold value, then judge that battery crimping is bad, and start preset crimping not
Good safeguard measure.
2. crimping undesirable detection method in battery charging and discharging test according to claim 1, which is characterized in that the side
Method further includes：
Step E, when the weighted difference is less than or equal to the threshold value, then averagely crimping impedance is iterated to calculate, and update
Observation window continues to execute charge-discharge test.
3. crimping undesirable detection method in battery charging and discharging test according to claim 1, which is characterized in that the side
Method further includes：
Step S1, battery is entered into charging/discharging apparatus in advance, the output channel of the tab of battery and charging/discharging apparatus is connected, and
The twin voltage sample circuit is connect with the port of battery pole ear and charging/discharging apparatus.
4. crimping undesirable detection method in battery charging and discharging test according to claim 3, which is characterized in that described double
Voltage sampling circuit includes main channel and secondary channels；
The main channel is crimped at the different location of battery pole ear by two voltage probes in parallel and measures battery pole ear electricity
Pressure；
The secondary channels are connect with the port of the charging/discharging apparatus, to measure the port output voltage of the charge and discharge point device.
5. crimping undesirable detection method in battery charging and discharging test according to claim 1, which is characterized in that the side
Method further includes：
Step S2, a threshold value is set in the detection terminal in advance, and the threshold value with weighted difference for being compared, to sentence
Whether breaking, it is bad to crimp.
6. crimping undesirable detection method in battery charging and discharging test according to claim 1, which is characterized in that the step
Suddenly A includes：
Step A1, after the output channel of the tab of battery and charging/discharging apparatus connects, start computer vision auxiliary positioning system
System positions the pallet of placing battery；
Step A2, start charge-discharge test technique, control press contacts battery pole ear under the press of charging/discharging apparatus；
Step A3, the port output voltage of charging/discharging apparatus and the tab voltage of battery are measured.
7. crimping undesirable detection method in battery charging and discharging test according to claim 1, which is characterized in that the step
Suddenly B includes：
Step B1, detection terminal calculates n-th crimping resistance in observation window according to the port output voltage and tab voltage of measurement
Anti- and averagely crimping impedance；
Step B2, the first difference for calculating n-th crimping impedance and averagely crimping impedance；
Step B3, the second difference that n-th crimping impedance crimps impedance with recursive average is calculated.
8. crimping undesirable detection system in a kind of test of battery charging and discharging, which is characterized in that the detection system includes：
For carrying out the charging/discharging apparatus of charge-discharge test to battery；
For measuring the twin voltage sample circuit of the port output voltage of the charging/discharging apparatus and the tab voltage of battery；
It is connect with the twin voltage sample circuit, and by the port output voltage to measurement and based on battery pole ear voltage carries out
It calculates, and judges whether to crimp undesirable detection terminal；
The detection terminal includes：
Computing module, for the port output voltage and battery pole ear voltage according to measurement, calculate instantaneous crimping impedance and
Averagely crimping impedance, and the first difference for calculating instantaneous crimping impedance and averagely crimping impedance, and instantaneously crimp impedance and pass
Return the second difference of average crimping impedance；
Comparison module obtains weighted difference, and described will add for being weighted summation to first difference and the second difference
Weighted error value is compared with preset threshold value；
Judgment module then judges that battery crimping is bad, and start preset crimping when the weighted difference is greater than the threshold value
Bad safeguard measure.
9. crimping undesirable detection system in battery charging and discharging test according to claim 8, which is characterized in that described double
Voltage sampling circuit includes main channel and secondary channels；
The main channel is crimped at the different location of battery pole ear by two voltage probes in parallel and measures battery pole ear electricity
Pressure；
The secondary channels are connect with the port of the charging/discharging apparatus, to measure the port output voltage of the charge and discharge point device.
10. crimping undesirable detection system in battery charging and discharging test according to claim 8, which is characterized in that described
The tab of battery and the output channel of charging/discharging apparatus connect；The twin voltage sample circuit is set with battery pole ear and charge and discharge
Standby port connection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810810509.0A CN108896951A (en) | 2018-07-23 | 2018-07-23 | Undesirable detection method and detection system are crimped in a kind of test of battery charging and discharging |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810810509.0A CN108896951A (en) | 2018-07-23 | 2018-07-23 | Undesirable detection method and detection system are crimped in a kind of test of battery charging and discharging |
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| CN108896951A true CN108896951A (en) | 2018-11-27 |
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| CN111983496A (en) * | 2020-08-10 | 2020-11-24 | 中国科学技术大学 | Virtual connection and internal resistance increase fault identification method for parallel lithium ion battery pack |
| CN113203917A (en) * | 2021-04-25 | 2021-08-03 | 国网河南省电力公司平顶山供电公司 | Method for pre-judging heating defect of diversion loop of reactive power compensation device |
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| CN104749478A (en) * | 2013-12-30 | 2015-07-01 | 昆山国显光电有限公司 | Crimping test circuit and test method as well as application of circuit and method |
| CN106936181A (en) * | 2017-02-28 | 2017-07-07 | 深圳市瑞能实业股份有限公司 | The detection circuit of charging and discharging circuit contact impedance, detection method and its self checking method |
| CN107271923A (en) * | 2017-08-14 | 2017-10-20 | 中国重汽集团济南动力有限公司 | A kind of electrokinetic cell high voltage connector fault detection system and detection method |
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| CN101713794A (en) * | 2009-10-23 | 2010-05-26 | 广州蓝奇电子实业有限公司 | Method for detecting poor contact of battery voltage testing terminals |
| CN104749478A (en) * | 2013-12-30 | 2015-07-01 | 昆山国显光电有限公司 | Crimping test circuit and test method as well as application of circuit and method |
| CN106936181A (en) * | 2017-02-28 | 2017-07-07 | 深圳市瑞能实业股份有限公司 | The detection circuit of charging and discharging circuit contact impedance, detection method and its self checking method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111983496A (en) * | 2020-08-10 | 2020-11-24 | 中国科学技术大学 | Virtual connection and internal resistance increase fault identification method for parallel lithium ion battery pack |
| CN113203917A (en) * | 2021-04-25 | 2021-08-03 | 国网河南省电力公司平顶山供电公司 | Method for pre-judging heating defect of diversion loop of reactive power compensation device |
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Application publication date: 20181127 |