CN105304954A - Battery grouping method and battery grouping system - Google Patents
Battery grouping method and battery grouping system Download PDFInfo
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- CN105304954A CN105304954A CN201510638237.7A CN201510638237A CN105304954A CN 105304954 A CN105304954 A CN 105304954A CN 201510638237 A CN201510638237 A CN 201510638237A CN 105304954 A CN105304954 A CN 105304954A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4285—Testing apparatus
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention relates to a battery grouping method and a battery grouping system. The battery grouping method comprises the following steps: S1, putting batteries into a secondary battery performance detection cabinet and carrying out first time of capacity grading according to effective data; S2, putting the batteries into the secondary battery performance detection cabinet again and carrying out second time of capacity grading according to the effective data; by taking a capacity which is detected at the second time as the standard, selecting batteries with abnormal capacities; by taking voltage drop as the standard, selecting batteries with abnormal voltage; S3, carrying out alternating-current internal resistance detection, direct-current internal resistance detection and voltage drop detection; grading according to a numerical value range of a discharging capacity which is detected at the second time; after grading, carrying out grading grouping on the batteries according to the voltage drop and the numerical value ranges of an alternating-current internal resistance value and a direct-current internal resistance value. The battery grouping method and the battery grouping system have the beneficial effects that by detecting the capacities, the voltage drop and the inner resistances for two times, bad battery single bodies can be selected and battery packs which meet actual working conditions to the greatest extent can be highly precisely grouped.
Description
Technical field
The present invention relates to battery detecting matching technique field, particularly a kind of method for group matching of battery and combo system thereof.
Background technology
In actual applications, in order to adapt to load requirement often needs tens of even hundreds of battery cells are fitted together by serial or parallel connection, to meet the demand of high voltage high power capacity.Require that the parameters such as the internal resistance of these batteries, capacity will be tried one's best unanimously in theory, thus the power that battery can be made to discharge is maximum.But because working condition, manufacturing environment, material behavior, the impact of the factors such as production equipment makes for the battery parameter of same batch (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) all variant, so the inconsistency between cell is absolute being, therefore in actual applications, the relatively good battery cell of consistency must be gone out by group gas-mixing screening and carry out combo, assembling, the overall performance of battery pack is just likely made to reach gratifying degree.
If the performance parameters such as the capacity between the battery cell of battery pack, internal resistance are not mated, so will affect the useful life of battery, cause use cost raise and environment can be endangered; It is overheated that unmatched battery cell occurs at charge and discharge process, even endangers personal safety as well as the property safety.Such as, in same battery pack, certain batteries internal resistance is bigger than normal, then during charging, when whole Battery pack is full of, this batteries overcharges, and same this batteries when whole Battery pack is discharged is crossed and put, and causes vicious circle, accelerate this batteries performance degradation, and then whole Battery pack can not be brought into normal play usefulness.The bad battery of consistency occurs that in discharge process electric discharge is uneven, so just makes battery can not reach maximum power electric discharge.So battery pack combo just requires each batteries balancing performance in battery pack.So-called equilibrium refers to that charging to charging by same procedure terminates, and voltage is identical, and in the electric current allowed and voltage range, with same time by same current (no matter charge and discharge), its voltage variety is identical.The battery reaching above-mentioned requirements, when connecting use, can ensure that the cell voltage forming battery pack is consistent all the time.Mostly combo battery is carried out by one or both in the performances such as measuring capacity, pressure drop and internal resistance in existing battery pack method for group matching; There is following shortcoming in existing method for group matching:
Present stage, battery producer continued to use traditional manual work mode always, adopted artificial loading and unloading work, artificial separation battery, and labour intensity is large, and human error is obvious; Artificial separation simultaneously also will add human factor in battery sorting.And only once select, the probability surveyed by mistake or mismatch is larger.
The method of existing measuring capacity generally adopts fixing charging and discharging currents measuring capacity, and non-usage operating current carries out charge-discharge test, and it is larger that measured capacity carries out combo error.
The existing measurement internal resistance of cell generally adopts AC internal Resistance method to measure internal resistance.AC internal Resistance method is applicable to battery small area analysis output environment, the environment that such as actual current such as digital battery, battery of mobile phone is less.But electrokinetic cell is that (common lithium battery electric discharge is 1/10C to high-multiplying power discharge, electrokinetic cell discharges often 1C, 2C is 4C even), and the polarization reaction that heavy-current discharge causes and polarization resistance are often greater than AC internal Resistance, more than the result of alternating current method is more half as large than actual value.In summary, existing battery grouping method efficiency is low, harmony is poor, error is larger.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of high efficiency, harmony is good, error is little battery grouping method are provided.The present invention can be widely used in the combo of various High-current output battery or small current output battery.Another object of the present invention is to provide a kind of battery combo system.
The method for group matching of a kind of battery provided by the invention, its technical scheme is:
A method for group matching for battery, comprises the following steps:
S1, battery is put into secondary cell Performance Detection cabinet after carry out first time partial volume according to valid data, valid data comprise discharge capacity Q1, charging capacity Q2 and the open circuit voltage OCV1 of battery; The detection of valid data carries out discharge and recharge detection with operating current;
S2, battery is put into secondary cell Performance Detection cabinet again after carry out second time partial volume according to valid data, valid data comprise discharge capacity Q3, charging capacity Q4 and the open circuit voltage OCV2 of battery, and go out pressure drop K1 according to measuring the calculation of parameter that obtains; Be as the criterion with the capacity Q3 that second time records, simultaneously with reference to the discharge capacity Q1 recorded for the first time and charging capacity Q2, pick out the battery of capacity exception; Be as the criterion with pressure drop K1, pick out the battery of electric voltage exception;
S3, battery put into voltage internal resistance detection cabinet and carry out AC internal Resistance detection and DC internal resistance detects, and go out pressure drop K2 according to measuring the calculation of parameter obtained; Number range according to discharge capacity Q3 carries out stepping, carries out stepping combo again after stepping according to the number range of pressure drop K2 and AC internal Resistance detected value and DC internal resistance detected value to battery.
The method for group matching of a kind of battery provided by the invention, can also comprise following technical scheme:
Wherein, the open circuit voltage OCV1 in step S1 and the open circuit voltage OCV2 in step S2 shelves the open circuit voltage detected after 3 ~ 20 minutes after charging complete;
When selecting the battery of electric voltage exception in step S2, be as the criterion with pressure drop K1, simultaneously with reference to Δ Qd and Δ Qc, the computational methods of Δ Qd and Δ Qc are Δ Qd=Q3-Q1, Δ Qc=Q4-Q2;
In step S3, the method for carrying out stepping according to internal resistance first selects high changeable internal damp bvattery according at the beginning of AC internal Resistance detected value, then carries out selected stepping according to the number range of DC internal resistance detected value.
Wherein, increase by a step S0 before step S1, step S0 prepares coded message for adopting encoding device on battery, and coded message stored in computer; Before execution step S1, S2 and S3, adopt scanning device scan and record the coded message on battery, by the detection data of battery and coded message stored in database, described computer comprises data processing module, data processing module completes the computation and analysis of data, realizes the selected combo of automation.
Wherein, described encoding device is scanner and ink jet numbering machine, and battery identification information spray printing at battery surface, is obtained coded message by described scanner in battery surface scanning by ink jet numbering machine.
Wherein, between step S1 and step S2, increase step S12, step S12 puts into aging cabinet battery to carry out high temperature ageing, and the process of high temperature ageing keeps 5-120h at 36-80 DEG C of temperature.
Wherein, between step S2 and step S3, increase step S23, step S23 be battery put into aging cabinet carry out high temperature ageing or normal temperature aging; The process of described high temperature ageing keeps 5-120h at 36-80 DEG C of temperature; The process that described normal temperature is aging keeps 72-360h at 10-35 DEG C of temperature.
Wherein, between step S2 and step S23, increase step S21, step S21 puts into balanced cabinet equalizing voltage battery, makes voltage difference between battery within 1mV.
Wherein, the result that DC internal resistance detects also comprises the peak power of battery, by the performance of peak power assessment battery, and as the foundation of combo.
Wherein, the method for group matching of described battery is used for the digital battery combo of high request, Notebook Battery combo, medium and small electrokinetic cell combo or large electrokinetic cell combo.
Present invention also offers a kind of battery combo system, its technical scheme is:
A kind of battery combo system, comprising:
For preparing the coding scanning device of coded message to battery;
For memory encoding information and the computer detecting data;
For the secondary cell Performance Detection cabinet detected 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;
Comprise the voltage internal resistance detection cabinet of AC internal Resistance checkout equipment and DC internal resistance checkout equipment.
Explanation of nouns:
Secondary cell Performance Detection cabinet is the detecting box that can be used for detecting secondary cell, secondary cell is also rechargeable battery, utilize the invertibity of chemical reaction, a new battery can be set up into, namely after a chemical reaction is converted into electric energy, chemical system reparation can also be made with electric energy, and then utilize chemical reaction to be converted into electric energy, so be secondary cell.Secondary cell (Rechargeablebattery) is also called rechargeable battery or storage battery, refers to and after battery discharge, by the mode of charging, active material is activated and continue the battery of use.
Current value required when battery discharge multiplying power C refers to that its rated capacity released by battery in official hour, it equals the multiple of battery rated capacity on data value, usually represents with letter C.
Enforcement of the present invention comprises following technique effect:
The method for group matching of a kind of battery provided by the invention is by twice capacity check, twice voltage drop detection and two kinds of internal resistance detections, bad battery cell can be at utmost chosen according to above-mentioned parameter, adopt capacity, pressure drop (self-discharge rate) and internal resistance three parameters to carry out comprehensive combo simultaneously, with high accuracy combo can go out the battery pack of the most realistic operating mode.By twice measurement capacity, be as the criterion for main with second time discharge capacity, the first time discharge capacity of reference simultaneously and charging capacity, can prevent erroneous judgement, with operating current for a point capacitance current, at utmost detects the effective capacity of reality.Selected by twice low-voltage, first time primary election, picks out obvious low-voltage, is as the criterion with pressure drop K value, and whether reference Δ Qd and Δ Qc comprehensive descision are the methods of low-voltage, reduce False Rate.Second time is selected, selects the same battery combo of self-discharge rate while rejecting low-voltage.Selected by twice internal resistance, AC internal Resistance method is for selecting internal resistance pairing during operating state, and DC internal resistance is for selecting internal resistance pairing during moment operating state, and high changeable internal damp bvattery is selected through twice simultaneously, farthest can choose the good battery of consistency.Aging for a long time by twice, battery performance reliability and stability can be ensured.By adopt Database Systems, automation match, combo success rate and combo efficiency high, use manpower and material resources sparingly simultaneously.Adopt twice partial volume and aging, the combo problem that the defect greatly reducing test loose contact causes capacity inaccurate.
Method provided by the present invention is by the combination of the equipment such as secondary cell Performance Detection cabinet, balanced cabinet, scanner, ink jet numbering machine, computer, voltage internal resistance detection cabinet and aging cabinet, cost is low, is applicable to the digital battery combo of high request, Notebook Battery combo, medium and small electrokinetic cell combo and large electrokinetic cell combo etc.
Accompanying drawing explanation
Fig. 1 is the FB(flow block) of the method for group matching of a kind of battery of the embodiment of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in detail, it is pointed out that described embodiment is only intended to be convenient to the understanding of the present invention, and any restriction effect is not play to it.
Shown in Figure 1, the method for group matching of a kind of battery of the present invention, comprises the following steps:
S0, employing encoding device prepare coded message on battery, and coded message stored in computer; Encoding device can be scanner and ink jet numbering machine, by ink jet numbering machine by battery identification information spray printing at battery surface, then scan on battery with scanner and obtain coded message; Before execution step S1, S2 and S3, adopt scanning device scan and record the coded message on battery, by the detection data of battery and coded message stored in database, described computer comprises data processing module, data processing module completes the computation and analysis of data, realizes the selected combo of automation.
S1, battery is put into secondary cell Performance Detection cabinet after carry out first time partial volume according to valid data, valid data comprise discharge capacity Q1, charging capacity Q2 and the open circuit voltage OCV1 of battery; The detection of valid data carries out discharge and recharge detection with operating current; Detect after preferred open circuit voltage OCV1 shelves 3 ~ 20 minutes after charging complete; In the present embodiment, the detection of valid data is a point capacitance current with operating current (average current namely under actual working state).This step can ensure capacity accuracy under normal behaviour in service and ensure the capacity combo consistency of battery in use procedure.The larger battery of capacity anomaly ratio can be removed according to valid data in this step, tentatively pick out the battery that consistency is good.
S12, battery is put into aging cabinet carry out high temperature ageing, the process of high temperature ageing keeps 5-120h at 36-80 DEG C of temperature; Preferably at 38-60 DEG C of temperature, keep 24-120h; Preferably further at 40-50 DEG C of temperature, keep 48-72h; This step can optimize the SEI film of battery, picks out bad battery, can promote the reliability and stability of battery.
S2, battery is put into secondary cell Performance Detection cabinet again after carry out second time partial volume according to valid data, valid data comprise discharge capacity Q3, charging capacity Q4 and the open circuit voltage OCV2 of battery, and go out pressure drop K1 according to measuring the calculation of parameter that obtains; Be as the criterion with the capacity Q3 that second time records, simultaneously with reference to the discharge capacity Q1 recorded for the first time and charging capacity Q2, pick out the battery of capacity exception; Be as the criterion with pressure drop K1, pick out the battery of electric voltage exception; As preferably, when selecting the battery of electric voltage exception, with Δ Qd and Δ Qc as a reference, the computational methods of Δ Qd and Δ Qc are Δ Qd=Q3-Q1, Δ Qc=Q4-Q2; The capacity Q3 obtained with second time partial volume is as the criterion, and simultaneously with reference to first time discharge capacity Q1, charging capacity Q2, can prevent erroneous judgement.After obtaining data, Database Systems are selected automatically according to the coded message of battery, improve efficiency.
S21, battery is put into balanced cabinet equalizing voltage, make pressure reduction between battery within 1mV.Use balanced cabinet operation, both can make the differential pressure balancing between battery cell, be less than 1mV, equalizing voltage in enormous quantities can have been realized again, improve efficiency.
S23, battery put into again aging cabinet carry out high temperature ageing or normal temperature aging; The process of high temperature ageing keeps 5-120h at 36-80 DEG C of temperature, preferably at 38-60 DEG C of temperature, keeps 24-120h, preferably further at 40-50 DEG C of temperature, keeps 48-72h; The process that normal temperature is aging keeps 72-360h at normal temperatures, preferably keeps 120-360h at normal temperatures, preferably keeps 168-360h at normal temperatures further.Battery, by aging for a long time, picks out low-voltage defective products further.In the present embodiment, the temperature of normal temperature is 10-35 DEG C.
S3, battery put into voltage internal resistance detection cabinet and carry out AC internal Resistance detection and DC internal resistance detects, and go out pressure drop K2 according to measuring the calculation of parameter obtained; Number range according to discharge capacity Q3 carries out stepping, carries out stepping combo again after stepping according to the number range of pressure drop K2 and AC internal Resistance detected value and DC internal resistance detected value to battery;
As preferably, the method for carrying out stepping according to internal resistance first selects high changeable internal damp bvattery according at the beginning of AC internal Resistance detected value, then carries out selected stepping according to the number range of DC internal resistance detected value; The result that DC internal resistance detects also comprises the peak power of battery, by the performance of the peak power assessment power of battery, and as the foundation of combo, so ensures that battery battery pack conditions under the high power situation of moment is good.The present embodiment adopts two kinds of methods to detect internal resistance, and wherein, AC internal Resistance detected value is for picking out the internal resistance combo under operating state, and DC internal resistance detected value is for selecting the internal resistance combo under moment operating state; AC internal Resistance detection method can ensure the consistency of internal resistance of battery under low range; DC internal resistance detection method can ensure the consistency of internal resistance of battery under high magnification.Therefore using said method high efficiencyly can carry out combo to battery, the battery pack balancing after combo is good and error is little.Can be used for digital battery combo, Notebook Battery combo, low-power battery combo or large electrokinetic cell combo.
DC internal resistance mensuration can be DCR method, HPPC method, MCCF method, or according to the equivalent method of testing of applying working condition with reference to three kinds of method design above.In the present embodiment, internal resistance detection method is as follows:
AC internal Resistance method: the sine-wave current (being generally mA rank) adopting 1KHz, tests the pressure drop caused, and calculates internal resistance value.
DC internal resistance method: the electric current directly in employing work, just tests the pressure drop caused, calculates internal resistance value after postponing a period of time.
DCR method: the electric current using different charging and discharging multiplying powers, continues 10S, recording voltage and electric current, and form straight line, slope is internal resistance.
MCCF method: adopt the duration to be the pulse charging and discharging currents of 5S, recording voltage falls, and calculates internal resistance.
HPPC method: adopt continuous print discharge and recharge pulse, test the pressure drop caused, have two kinds of methods to be exemplified below: 18 seconds discharge times, charging 2S; The discharge and recharge time is 10S.
The computational methods of pressure drop K value are, K1=(open circuit voltage OCV1-open circuit voltage OCV2)/high temperature ageing the time
K2=(equalizing voltage or open circuit voltage-select electrical testing voltage)/(when time for balance or open circuit m-choosing electric time)
It is emphasized that step S0, preferred as the present embodiment of S12, S21 and S23, do not perform above-mentioned steps, only perform step S1, S2 and S3 and also can realize object of the present invention.
The present embodiment additionally provides a kind of battery combo system, comprising:
For preparing the coding scanning device of coded message to battery;
For memory encoding information and the computer detecting data;
For the secondary cell Performance Detection cabinet detected 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;
Comprise the voltage internal resistance detection cabinet of AC internal Resistance checkout equipment and DC internal resistance checkout equipment.
Use the battery combo system of the present embodiment, the sequence of flow during combo of battery is, first coding scanning device is used to prepare coded message on battery, then battery enters secondary cell Performance Detection cabinet and carries out first time partial volume, after first time partial volume, battery enters aging cabinet to carry out first time aging, battery after first time is aging again enters secondary cell Performance Detection cabinet and carries out second time partial volume, carries out first time low-voltage for the second time and select while partial volume; Battery after selecting enters balanced cabinet equalizing voltage, after equalizing voltage, battery again enters aging cabinet to carry out second time aging, twice internal resistance detection (being that AC internal Resistance detects and DC internal resistance detects respectively) is carried out after battery after second time is aging enters voltage internal resistance detection cabinet, pressure drop is calculated, as the foundation that second time low-voltage is selected while internal resistance detection.Finally picking out the good battery of consistency according to capacity, pressure drop and internal resistance carries out combo.Secondary cell Performance Detection cabinet and voltage internal resistance detection cabinet are all equipped with computer, for store and analyzing and processing coded message and detection data.Namely the trend of battery is encoding device-secondary cell Performance Detection cabinet-aging cabinet-secondary cell Performance Detection cabinet-balanced cabinet-aging cabinet-voltage internal resistance detection cabinet.
The combo system that the present embodiment provides is by the combination of the equipment such as secondary cell Performance Detection cabinet, balanced cabinet, scanner, ink jet numbering machine, computer, voltage internal resistance detection cabinet and aging cabinet, cost is low, is applicable to the digital battery combo of high request, Notebook Battery combo, medium and small electrokinetic cell combo and large electrokinetic cell combo.The battery pack balancing of joining is good, error is little, according to the more realistic operating mode of capacity combo that operating current detects.By AC internal Resistance value and DC internal resistance value associating combo, overcome the defect of single internal resistance detection, improve the consistency of the battery cell of battery pack.Twice sorting combo, combo validity is high, obviously promotes battery pack reliability.And the automatic combo of usage data storehouse system, automaticity is high, combo success rate and combo efficiency high.
Finally should be noted that; above embodiment is only in order to illustrate technical scheme of the present invention; but not limiting the scope of the invention; although done to explain to the present invention with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to technical scheme of the present invention or equivalent replacement, and not depart from essence and the scope of technical solution of the present invention.
Claims (10)
1. a method for group matching for battery, is characterized in that: comprise the following steps:
S1, battery is put into secondary cell Performance Detection cabinet after carry out first time partial volume according to valid data, valid data comprise discharge capacity Q1, charging capacity Q2 and the open circuit voltage OCV1 of battery; Valid data carry out discharge and recharge detection with operating current;
S2, battery is put into secondary cell Performance Detection cabinet again after carry out second time partial volume according to valid data, valid data comprise discharge capacity Q3, charging capacity Q4 and the open circuit voltage OCV2 of battery, and go out pressure drop K1 according to measuring the calculation of parameter that obtains; Be as the criterion with the capacity Q3 that second time records, simultaneously with reference to the discharge capacity Q1 recorded for the first time and charging capacity Q2, pick out the battery of capacity exception; Be as the criterion with pressure drop K1, pick out the battery of electric voltage exception;
S3, battery put into voltage internal resistance detection cabinet and carry out AC internal Resistance detection and DC internal resistance detects, and go out pressure drop K2 according to measuring the calculation of parameter obtained; Number range according to discharge capacity Q3 carries out stepping, carries out stepping combo again after stepping according to the number range of pressure drop K2 and AC internal Resistance detected value and DC internal resistance detected value to battery.
2. the method for group matching of a kind of battery according to claim 1, is characterized in that: the open circuit voltage OCV1 in step S1 and the open circuit voltage OCV2 in step S2 shelves the open circuit voltage detected after 3 ~ 20 minutes after charging complete;
When selecting the battery of electric voltage exception in step S2, be as the criterion with pressure drop K1, simultaneously with reference to Δ Qd and Δ Qc, the computational methods of Δ Qd and Δ Qc are Δ Qd=Q3-Q1, Δ Qc=Q4-Q2;
In step S3, the method for carrying out stepping according to internal resistance first selects high changeable internal damp bvattery according at the beginning of AC internal Resistance detected value, then carries out selected stepping according to the number range of DC internal resistance detected value.
3. the method for group matching of a kind of battery according to claim 1, is characterized in that: before step S1, increase step S0, and step S0 prepares coded message for adopting encoding device on battery, and coded message stored in computer; Before execution step S1, S2 and S3, scanning device is adopted to scan and record the coded message on battery, by the detection data of battery and coded message stored in database, described computer comprises data processing module, described data processing module completes the computation and analysis of data, realizes the selected combo of automation.
4. the method for group matching of a kind of battery according to claim 3, it is characterized in that: described encoding device is scanner and ink jet numbering machine, at battery surface, battery identification information is encoded by described ink jet numbering machine, obtain battery identification information with scanner scanning battery coding.
5. the method for group matching of a kind of battery according to claim 1, it is characterized in that: between step S1 and step S2, increase step S12, step S12 puts into aging cabinet battery to carry out high temperature ageing, and the process of high temperature ageing keeps 5-120h at 36-80 DEG C of temperature.
6. the method for group matching of a kind of battery according to claim 1, is characterized in that: between step S2 and step S3, increase step S23, step S23 be battery put into aging cabinet carry out high temperature ageing or normal temperature aging; The process of described high temperature ageing keeps 5-120h at 36-80 DEG C of temperature; The process that described normal temperature is aging keeps 72-360h at 10-35 DEG C of temperature.
7. the method for group matching of a kind of battery according to claim 6, is characterized in that: between step S2 and step S23, increase step S21, and step S21 puts into balanced cabinet equalizing voltage battery, makes voltage difference between battery within 1mV.
8. the method for group matching of a kind of battery according to claim 1, is characterized in that: the result that DC internal resistance detects also comprises the peak power of battery, by the performance of peak power assessment battery, and as the foundation of combo.
9. according to the method for group matching of the arbitrary described a kind of battery of claim 1 ~ 8, it is characterized in that: the method for group matching of described battery is used for the digital battery combo of high request, Notebook Battery combo, medium and small electrokinetic cell combo and large electrokinetic cell combo.
10. a battery combo system, is characterized in that, comprising:
For preparing the coding scanning device of coded message to battery;
For memory encoding information and the computer detecting data;
For the secondary cell Performance Detection cabinet detected 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;
Comprise the voltage internal resistance detection cabinet of AC internal Resistance checkout equipment and DC internal resistance checkout equipment.
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| CN107302112A (en) * | 2017-06-30 | 2017-10-27 | 奇瑞汽车股份有限公司 | Battery stepping method |
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| CN108226806A (en) * | 2018-01-31 | 2018-06-29 | 河南国能电池有限公司 | Self discharge detection method and battery check device after charged |
| CN108539299A (en) * | 2018-04-11 | 2018-09-14 | 广东力科新能源有限公司 | Dynamic low-voltage matching method and system for multi-serial-parallel lithium ion battery pack |
| CN109047040A (en) * | 2018-06-12 | 2018-12-21 | 东莞市德尔能新能源股份有限公司 | Lithium battery screening system based on big data |
| CN109143106A (en) * | 2018-08-09 | 2019-01-04 | 南京卡耐新能源技术发展有限公司 | A method of battery consistency is quickly detected by ac impedance measurement |
| CN110813799A (en) * | 2018-08-13 | 2020-02-21 | 中信国安盟固利动力科技有限公司 | Consistency screening method of lithium titanate single battery for high rate |
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| CN113820607A (en) * | 2021-08-12 | 2021-12-21 | 双登集团股份有限公司 | Battery high-voltage matching detection process for high-voltage scene |
| CN115792685A (en) * | 2022-12-01 | 2023-03-14 | 南通泰平同人电子科技有限公司 | Battery cell matching method based on dynamic and static characteristic combination |
| US11699816B1 (en) | 2022-12-14 | 2023-07-11 | Shenzhen Hotchip Technology Co., Ltd. | Rechargeable battery |
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