CN105304954B - The method for group matching and its combo system of a kind of battery - Google Patents

The method for group matching and its combo system of a kind of battery Download PDF

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Publication number
CN105304954B
CN105304954B CN201510638237.7A CN201510638237A CN105304954B CN 105304954 B CN105304954 B CN 105304954B CN 201510638237 A CN201510638237 A CN 201510638237A CN 105304954 B CN105304954 B CN 105304954B
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China
Prior art keywords
battery
internal resistance
combo
capacity
detection
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CN201510638237.7A
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Chinese (zh)
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CN105304954A (en
Inventor
杨和山
陈湘彪
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东莞市致格电池科技有限公司
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4207Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/04Construction or manufacture in general
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4285Testing apparatus
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The present invention relates to a kind of method for group matching of battery and its combo system.A kind of method for group matching of battery, comprises the following steps:S1, battery is put into after secondary cell performance detection cabinet and carries out first time partial volume according to valid data;S2, battery is placed again into after secondary cell performance detection cabinet and carries out second of partial volume according to valid data, be defined by the capacity measured for the second time, pick out the abnormal battery of capacity;It is defined by pressure drop, picks out the battery of electric voltage exception;S3, carry out AC internal Resistance detection, DC internal resistance detection and voltage drop detection;According to the number range of the discharge capacity of second of detection progress stepping, stepping combo is carried out to battery further according to pressure drop and the number range of AC internal Resistance detected value and DC internal resistance value after stepping.Its advantage is:By being detected twice to capacity, pressure drop and internal resistance, bad battery cell can be chosen, with high accuracy combo goes out to best suit the battery pack of actual condition.

Description

The method for group matching and its combo system of a kind of battery
Technical field
The present invention relates to battery detecting matching technique field, the method for group matching of more particularly to a kind of battery and its with system System.
Background technology
In actual applications, it is frequently necessary to a tens of or even hundreds of battery cell passing through string to adapt to the requirement of load Connection or assembled in parallel together, to meet the needs of high voltage high power capacity.Require that internal resistance, capacity of these batteries etc. are joined in theory Number is as far as possible consistent, so as to make the power that battery discharges maximum.But because working condition, manufacturing environment, material property, life The influence of the factors such as production equipment causes for a batch of battery parameter(Such as monomer rated capacity, monomer open-circuit voltage, monomer Charging voltage platform, monomer discharge voltage plateau, monomer internal resistance, the electrochemical properties etc. of monomer)It is all variant, so monomer is electric Inconsistency between pond is absolute being, therefore in actual applications, it is necessary to it is relatively preferable that uniformity is gone out by group gas-mixing screening Battery cell carry out combo, assembling, be possible to so that the overall performance of battery pack reaches gratifying degree.
If the performance parameters such as capacity, internal resistance between the battery cell of battery pack mismatch, then will influence battery Service life, cause use cost to raise and can also endanger environment;Unmatched battery cell occurs in charge and discharge process Overheat, or even endanger personal safety as well as the property safety.Such as certain batteries internal resistance is bigger than normal in same battery pack, then work as whole group battery when charging Full of when the batteries overcharge, same batteries when whole group battery is discharged, which are crossed, puts, and causes vicious circle, accelerates the section Cell performance decay, and then prevent whole group battery from efficiency of bringing into normal play.The bad battery of uniformity occurs in discharge process Discharge uneven, peak power electric discharge can not be reached by so allowing for battery.So battery pack combo requires each in battery pack Batteries balancing performance.So-called equilibrium refers to that charging to charging with same procedure terminates, and voltage is identical, in the electric current and electricity of permission In the range of pressure, same current is passed through with same time(No matter charge and discharge), its voltage variety is identical.Reach the battery of above-mentioned requirements When being used in series, it is ensured that the cell voltage for forming battery pack is consistent all the time.Lead to mostly in existing battery pack method for group matching One or both of performances such as measurement capacity, pressure drop and internal resistance are crossed to match somebody with somebody Battery pack;Following shortcomings be present in existing method for group matching:
Battery producer continues to use traditional manual work mode always at this stage, is worked using artificial loading and unloading, artificial separation Battery, labor intensity is big, and human error is obvious;Artificial separation simultaneously will also add human factor in battery sorting.And Only once selected, the probability surveyed or mismatched by mistake is larger.
The method of existing measurement capacity typically measures capacity using fixed charging and discharging currents, rather than is carried out using operating current Charge-discharge test, measured capacity carry out larger with grouping error.
The existing measurement internal resistance of cell is typically using the measurement internal resistance of AC internal Resistance method.AC internal Resistance method is applied to battery low current Output environment, such as the less environment of the actual current such as digital battery, battery of mobile phone.But electrokinetic cell is high-multiplying power discharge (Common lithium battery electric discharge is 1/10C, electrokinetic cell electric discharge often 1C, 2C even 4C), and polarization is anti-caused by heavy-current discharge Should be with polarization resistance commonly greater than AC internal Resistance, more than the result of alternating current method is more half as large than actual value.In summary, existing electricity Pond method for group matching efficiency is low, it is harmonious it is poor, error is larger.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of high efficiency, the electricity that harmony is good, error is small Pond method for group matching.It present invention may be broadly applicable to the combo of various High-current output battery or small current output batteries. It is a further object of the present invention to provide a kind of battery combo system.
A kind of method for group matching of battery provided by the invention, its technical scheme are:
A kind of method for group matching of battery, comprises the following steps:
S1, battery is put into after secondary cell performance detection cabinet and carries out first time partial volume, valid data according to valid data Discharge capacity Q1, charging capacity Q2 and open-circuit voltage OCV1 including battery;The detection of valid data is filled with operating current Discharge examination;
S2, battery is placed again into after secondary cell performance detection cabinet and carries out second of partial volume according to valid data, effectively Data include discharge capacity Q3, charging capacity Q4 and the open-circuit voltage OCV2 of battery, and the parameter obtained according to measurement calculates Go out pressure drop K1;It is defined by the capacity Q3 measured for the second time, with reference to the discharge capacity Q1 and charging capacity measured for the first time Q2, pick out the abnormal battery of capacity;It is defined by pressure drop K1, picks out the battery of electric voltage exception;
S3, battery is put into the progress AC internal Resistance detection of voltage internal resistance detection cabinet and DC internal resistance detection, and according to survey The parameter measured calculates pressure drop K2;Stepping is carried out according to discharge capacity Q3 number range, further according to pressure drop K2 after stepping And the number range of AC internal Resistance detected value and DC internal resistance detected value carries out stepping combo to battery.
A kind of method for group matching of battery provided by the invention, following technical scheme can also be included:
Wherein, the open-circuit voltage OCV2 in the open-circuit voltage OCV1 and step S2 in step S1 be shelve 3 after charging complete ~ The open-circuit voltage detected after 20 minutes;
When the battery of electric voltage exception is selected in step S2, it is defined by pressure drop K1, with reference to Δ Qd and Δ Qc, Δ Qd and Δ Qc computational methods are Δ Qd=Q3-Q1, Δ Qc=Q4-Q2;
In step S3, the method that stepping is carried out according to internal resistance is to select high internal resistance electricity according to AC internal Resistance detected value first Pond, selected stepping is then carried out according to the number range of DC internal resistance detected value.
Wherein, increase by a step S0 before step S1, step S0 is to prepare coding letter on battery using encoding device Breath, and coding information is stored in computer;Before step S1, S2 and S3 is performed, scan and record on battery using scanning device Coding information, the detection data and coding information of battery are stored in database, the computer includes data processing module, data Processing module completes the calculating and analysis of data, realizes and automates selected combo.
Wherein, the encoding device is scanner and ink jet numbering machine, ink jet numbering machine by battery identification information spray printing in battery surface, Scan in battery surface to obtain coding information by the scanner.
Wherein, it is that battery is put into aging cabinet to carry out height to increase step S12, step S12 between step S1 and step S2 Warm aging, the process of high temperature ageing are that 5-120h is kept at a temperature of 36-80 DEG C.
Wherein, it is that battery is put into aging cabinet to carry out height to increase step S23, step S23 between step S2 and step S3 Warm aging or normal temperature aging;The process of the high temperature ageing is that 5-120h is kept at a temperature of 36-80 DEG C;The normal temperature is old The process of change is that 72-360h is kept at a temperature of 10-35 DEG C.
Wherein, it is that battery is put into the balanced electricity of balanced cabinet to increase step S21, step S21 between step S2 and step S23 Pressure so that the voltage difference between battery is within 1mV.
Wherein, the result of DC internal resistance detection also includes the peak power of battery, and the property of battery is assessed by peak power Can, and as the foundation of combo.
Wherein, the method for group matching of the battery is used for the digital battery combo, Notebook Battery combo, middle petty action of high request Power battery combo or big electrokinetic cell combo.
Present invention also offers a kind of battery combo system, its technical scheme is:
A kind of battery combo system, including:
For preparing the coding scanning device of coding information to battery;
For storing coding information and detecting the computer of data;
For the secondary cell performance detection cabinet detected to the performance parameter of battery;
For carrying out the balanced cabinet of equalizing voltage to battery;
For carrying out the aging cabinet of burn-in test to battery;
Voltage internal resistance detection cabinet including AC internal Resistance detection device and DC internal resistance detection device.
Explanation of nouns:
Secondary cell performance detection cabinet is the detecting box that can be used for detection secondary cell, and secondary cell is also chargeable electricity Pond, using the invertibity of chemical reaction, a new battery can be set up into, i.e., after a chemical reaction is converted into electric energy, Chemical system reparation can also be made with electric energy, then recycle chemical reaction to be converted into electric energy, so being secondary cell.Secondary electricity Pond(Rechargeable battery) rechargeable battery or battery are also known as, referring to can be by the side of charging after battery discharge The battery that formula activates active material and is continuing with.
Battery discharge multiplying power C refers to that battery releases current value required during its rated capacity within the defined time, it It is equal to the multiple of battery rated capacity on data value, is generally represented with letter C.
The implementation of the present invention includes following technique effect:
A kind of method for group matching of battery provided by the invention passes through capacity check twice, twice voltage drop detection and two kinds of internal resistances Detection, bad battery cell can at utmost be chosen according to above-mentioned parameter, while using capacity, pressure drop(Self-discharge rate)With it is interior Three parameters of resistance carry out integrating combo, with high accuracy combo can go out to best suit the battery pack of actual condition.By examining twice Capacity is surveyed, is defined based on second of discharge capacity, with reference to first time discharge capacity and charging capacity, can prevent from missing Sentence, using operating current as partial volume electric current, at utmost detect actually active capacity.Selected by low-voltage twice, first Secondary primary election, pick out obvious low-voltage, be defined by pressure drop K values, with reference to Δ Qd and Δ Qc comprehensive descisions whether be low-voltage side Method, reduce False Rate.Second selected, and the same battery combo of self-discharge rate is selected while rejecting low-voltage.By twice Internal resistance is selected, and AC internal Resistance method is used to select internal resistance pairing during working condition, and DC internal resistance is used to select moment working condition When internal resistance pairing, while high internal resistance battery can farthest choose the good battery of uniformity by selecting twice.Pass through Prolonged aging twice, battery performance reliability and stability can be ensured.By using Database Systems, automation is matched somebody with somebody It is right, combo success rate and combo efficiency high, use manpower and material resources sparingly simultaneously.Using partial volume twice and aging, test is greatly reduced The defects of loose contact, causes the inaccurate combo problem of capacity.
Method provided by the present invention passes through secondary cell performance detection cabinet, balanced cabinet, scanner, ink jet numbering machine, computer, electricity The combination of the equipment such as internal resistance detection cabinet and aging cabinet is pressed, cost is low, digital battery combo, notebook suitable for high request Battery combo, medium and small electrokinetic cell combo and big electrokinetic cell combo etc..
Brief description of the drawings
Fig. 1 is a kind of FB(flow block) of the method for group matching of battery of the embodiment of the present invention.
Embodiment
The present invention is described in detail below in conjunction with embodiment and accompanying drawing, it should be pointed out that described reality Apply example and be intended merely to facilitate the understanding of the present invention, and do not play any restriction effect to it.
It is shown in Figure 1, a kind of method for group matching of battery of the invention, comprise the following steps:
S0, coding information is prepared on battery using encoding device, and coding information is stored in computer;Encoding device can To be scanner and ink jet numbering machine, by ink jet numbering machine by battery identification information spray printing in battery surface, then with scanner in battery Upper scanning obtains coding information;Before step S1, S2 and S3 is performed, scanned using scanning device and record the coding on battery Information, the detection data and coding information of battery are stored in database, the computer includes data processing module, data processing mould Block completes the calculating and analysis of data, realizes and automates selected combo.
S1, battery is put into after secondary cell performance detection cabinet and carries out first time partial volume, valid data according to valid data Discharge capacity Q1, charging capacity Q2 and open-circuit voltage OCV1 including battery;The detection of valid data is filled with operating current Discharge examination;It is preferred that open-circuit voltage OCV1 is detected after 3 ~ 20 minutes are shelved after charging complete;Significant figure in the present embodiment According to detection with operating current(Average current i.e. under actual working state)For partial volume electric current.This step can ensure normally to make With the capacity combo uniformity of battery during the capacity accuracy under situation and guarantee use.Can be according to effective in this step Data remove the extremely bigger battery of capacity, tentatively pick out the good battery of uniformity.
S12, battery is put into aging cabinet progress high temperature ageing, the process of high temperature ageing is kept at a temperature of 36-80 DEG C 5-120h;It is preferred that 24-120h is kept at a temperature of 38-60 DEG C;48- is further preferably kept at a temperature of 40-50 DEG C 72h;The step can optimize the SEI films of battery, pick out bad battery, can lift the reliability and stability of battery.
S2, battery is placed again into after secondary cell performance detection cabinet and carries out second of partial volume according to valid data, effectively Data include discharge capacity Q3, charging capacity Q4 and the open-circuit voltage OCV2 of battery, and the parameter obtained according to measurement calculates Go out pressure drop K1;It is defined by the capacity Q3 measured for the second time, with reference to the discharge capacity Q1 and charging capacity Q2 measured for the first time, Pick out the abnormal battery of capacity;It is defined by pressure drop K1, picks out the battery of electric voltage exception;Preferably, select electric voltage exception Battery when, using Δ Qd and Δ Qc as reference, Δ Qd and Δ Qc computational methods are Δ Qd=Q3-Q1, Δ Qc=Q4-Q2; The capacity Q3 obtained by second of partial volume is defined, and with reference to first time discharge capacity Q1, charging capacity Q2, can prevent from missing Sentence.After obtaining data, Database Systems are selected automatically according to the coding information of battery, improve efficiency.
S21, battery is put into balanced cabinet equalizing voltage so that the pressure difference between battery is within 1mV.Made using balanced cabinet It industry, can both make the differential pressure balancing between battery cell, less than 1mV, high-volume equalizing voltage can be realized again, improve effect Rate.
S23, battery is placed again into aging cabinet progress high temperature ageing or normal temperature aging;The process of high temperature ageing be 5-120h is kept at a temperature of 36-80 DEG C, 24-120h is preferably kept at a temperature of 38-60 DEG C, further preferably in 40-50 48-72h is kept at a temperature of DEG C;The process of normal temperature aging is to keep 72-360h at normal temperatures, is preferably kept at normal temperatures 120-360h, 168-360h is further preferably kept at normal temperatures.Battery further picks out low electricity by long-time aging Press defective products.The temperature of normal temperature is 10-35 DEG C in the present embodiment.
S3, battery is put into the progress AC internal Resistance detection of voltage internal resistance detection cabinet and DC internal resistance detection, and according to survey The parameter measured calculates pressure drop K2;Stepping is carried out according to discharge capacity Q3 number range, further according to pressure drop K2 after stepping And the number range of AC internal Resistance detected value and DC internal resistance detected value carries out stepping combo to battery;
Preferably, it is that high internal resistance electricity is selected according to AC internal Resistance detected value first according to the method for internal resistance progress stepping Pond, selected stepping is then carried out according to the number range of DC internal resistance detected value;The result of DC internal resistance detection also includes battery Peak power, by peak power assess the power of battery performance, and be used as the foundation of combo, so guarantee battery in moment High power situation under battery pack conditions it is good.The present embodiment detects internal resistance using two methods, wherein, AC internal Resistance detected value For picking out the internal resistance combo under working condition, the internal resistance that DC internal resistance detected value is used to select under moment working condition is matched somebody with somebody Group;AC internal Resistance detection method can ensure the consistency of internal resistance of battery under low range;DC internal resistance detection method can ensure high power Consistency of internal resistance of battery under rate.Therefore use the above method to carry out combo to battery with efficient, the battery pack after combo Harmony is good and error is small.Available for digital battery combo, Notebook Battery combo, low-power battery combo or big power Battery combo.
DC internal resistance mensuration can be DCR methods, HPPC methods, MCCF methods, or according to applying working condition with reference to above three kinds of sides The equivalent method of testing of method design.Internal resistance detection method is as follows in the present embodiment:
AC internal Resistance method:Using 1KHz sine-wave current(Generally mA ranks), to test caused pressure drop, in calculating Resistance.
DC internal resistance method:The electric current in work is directly used, just pressure drop caused by test, is calculated after delay a period of time Internal resistance value.
DCR methods:Using the electric current of different charging and discharging multiplying powers, continue 10S, recording voltage and electric current, form one Straight line, slope are internal resistance.
MCCF methods:Pulse charging and discharging currents of the duration for 5S are used, recording voltage drop, calculate internal resistance.
HPPC methods:Using continuous charge and discharge electric pulse, pressure drop caused by test, there are two methods to be exemplified below:During electric discharge Between 18 seconds, charge 2S;The discharge and recharge time is 10S.
The computational methods of pressure drop K values are, K1=(Open-circuit voltage OCV1- open-circuit voltages OCV2)/ high temperature ageing the time
K2=(Equalizing voltage or open-circuit voltage-select electrical testing voltage)/(It is m- when selecting electric when time for balance or open circuit Between)
It is emphasized that step S0, S12, S21 and S23 do not perform above-mentioned steps, only as the preferred of the present embodiment The purpose of the present invention can also be realized by performing step S1, S2 and S3.
The present embodiment additionally provides a kind of battery combo system, including:
For preparing the coding scanning device of coding information to battery;
For storing coding information and detecting the computer of data;
For the secondary cell performance detection cabinet detected to the performance parameter of battery;
For carrying out the balanced cabinet of equalizing voltage to battery;
For carrying out the aging cabinet of burn-in test to battery;
Voltage internal resistance detection cabinet including AC internal Resistance detection device and DC internal resistance detection device.
Using the battery combo system of the present embodiment, the sequence of flow during combo of battery is to be scanned first by coding Equipment prepares coding information on battery, then battery enter secondary cell performance detection cabinet carry out first time partial volume, first Battery enters aging cabinet progress first time aging after secondary partial volume, and the battery after first time aging is again introduced into secondary cell performance Detecting box carries out second of partial volume, and first time low-voltage is carried out while second of partial volume and is selected;Battery after selecting enters equal Weigh cabinet equalizing voltage, and battery is again introduced into aging cabinet and carries out second of aging, the electricity after second of aging after equalizing voltage Pond carries out internal resistance detection twice after entering voltage internal resistance detection cabinet(It is AC internal Resistance detection and DC internal resistance detection respectively), internal resistance Pressure drop is calculated while detection, the foundation selected as second of low-voltage.Finally picked out according to capacity, pressure drop and internal resistance The good battery of uniformity carries out combo.Secondary cell performance detection cabinet and voltage internal resistance detection cabinet are equipped with computer, for depositing Storage and analyzing and processing coding information and detection data.That is the trend of battery is encoding device-secondary cell performance detection cabinet-old Change cabinet-secondary cell performance detection cabinet-balanced cabinet-aging cabinet-voltage internal resistance detection cabinet.
The combo system that the present embodiment is provided by secondary cell performance detection cabinet, balanced cabinet, scanner, ink jet numbering machine, The combination of the equipment such as computer, voltage internal resistance detection cabinet and aging cabinet, cost is low, matches somebody with somebody suitable for the digital battery of high request Group, Notebook Battery combo, medium and small electrokinetic cell combo and big electrokinetic cell combo.With battery pack balancing is good, error It is small, actual condition is more met according to the capacity combo that operating current detects.Combined by internal resistance value and DC internal resistance value and matched somebody with somebody Group, the defects of overcoming single internal resistance detection, improve the uniformity of the battery cell of battery pack.Combo, combo are sorted twice Validity is high, hence it is evident that lifting battery pack reliability.And the automatic combo of Database Systems is used, automaticity is high, with composition Power and combo efficiency high.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than the present invention is protected The limitation of scope is protected, although being explained with reference to preferred embodiment to the present invention, one of ordinary skill in the art should Work as understanding, technical scheme can be modified or equivalent substitution, without departing from the reality of technical solution of the present invention Matter and scope.

Claims (6)

  1. A kind of 1. method for group matching of battery, it is characterised in that:Comprise the following steps:
    S1, included after battery is put into secondary cell performance detection cabinet according to valid data progress first time partial volume, valid data Discharge capacity Q1, charging capacity Q2 and the open-circuit voltage OCV1 of battery;Valid data carry out charge and discharge electro-detection with operating current;
    S12, battery is put into aging cabinet progress high temperature ageing, the process of high temperature ageing is that 5- is kept at a temperature of 36-80 DEG C 120h;
    S2, battery is placed again into after secondary cell performance detection cabinet and carries out second of partial volume, valid data according to valid data Discharge capacity Q3, charging capacity Q4 and open-circuit voltage OCV2 including battery, and the parameter obtained according to measurement calculate pressure K1 drops;It is defined by the capacity Q3 measured for the second time, with reference to the discharge capacity Q1 and charging capacity Q2 measured for the first time, is selected Go out the abnormal battery of capacity;It is defined by pressure drop K1, picks out the battery of electric voltage exception;Wherein, (open-circuit voltage OCV1- is opened K1= Road voltage OCV2)/high temperature ageing the time;
    S21, battery is put into balanced cabinet equalizing voltage so that the voltage difference between battery is within 1mV;
    S23, battery is put into aging cabinet progress high temperature ageing or normal temperature aging;The process of the high temperature ageing is in 36-80 5-120h is kept at a temperature of DEG C;The process of the normal temperature aging is that 72-360h is kept at a temperature of 10-35 DEG C;
    S3, battery is put into voltage internal resistance detection cabinet carries out AC internal Resistance detection and DC internal resistance detection, and according to measuring To parameter calculate pressure drop K2;Stepping is carried out according to discharge capacity Q3 number range, after stepping further according to pressure drop K2 and The number range of AC internal Resistance detected value and DC internal resistance detected value carries out stepping combo to battery;Wherein, K2=(equalizing voltages Either open-circuit voltage-select electrical testing voltage)/(m- when time for balance or open circuit to select the electric time).
  2. A kind of 2. method for group matching of battery according to claim 1, it is characterised in that:Open-circuit voltage OCV1 in step S1 It is the open-circuit voltage that is detected after shelving 3~20 minutes after charging complete with the open-circuit voltage OCV2 in step S2;
    When the battery of electric voltage exception is selected in step S2, it is defined by pressure drop K1, with reference to Δ Qd and Δ Qc, Δ Qd and Δ Qc's Computational methods are Δ Qd=Q3-Q1, Δ Qc=Q4-Q2;
    In step S3, the method that stepping is carried out according to internal resistance is to select high internal resistance battery according to AC internal Resistance detected value first, Then selected stepping is carried out according to the number range of DC internal resistance detected value.
  3. A kind of 3. method for group matching of battery according to claim 1, it is characterised in that:Increase step before step S1 S0, step S0 are that coding information is prepared on battery using encoding device, and coding information is stored in computer;Performing step Before S1, S2 and S3, scanned using scanning device and record the coding information on battery, the detection data of battery and coding are believed Breath deposit database, the computer include data processing module, and the data processing module completes the calculating and analysis of data, real Now automate selected combo.
  4. A kind of 4. method for group matching of battery according to claim 3, it is characterised in that:The encoding device be scanner and Ink jet numbering machine, battery identification information is encoded in battery surface by the ink jet numbering machine, encoded with scanner scanning battery To battery identification information.
  5. A kind of 5. method for group matching of battery according to claim 1, it is characterised in that:The result of DC internal resistance detection is also wrapped The peak power of battery is included, the performance of battery is assessed by peak power, and as the foundation of combo.
  6. 6. according to a kind of method for group matching of any described battery of Claims 1 to 5, it is characterised in that:The combo of the battery Method is used for digital battery combo, Notebook Battery combo, medium and small electrokinetic cell combo and big electrokinetic cell combo.
CN201510638237.7A 2015-09-30 2015-09-30 The method for group matching and its combo system of a kind of battery CN105304954B (en)

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