CN109188288A - A kind of power battery self discharge detection and stepping technique - Google Patents

A kind of power battery self discharge detection and stepping technique Download PDF

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Publication number
CN109188288A
CN109188288A CN201811153141.1A CN201811153141A CN109188288A CN 109188288 A CN109188288 A CN 109188288A CN 201811153141 A CN201811153141 A CN 201811153141A CN 109188288 A CN109188288 A CN 109188288A
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Prior art keywords
battery
constant
self discharge
stepping
current
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CN201811153141.1A
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Chinese (zh)
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白科
郭娜娜
瞿晓龙
朱锦龙
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Jiangxi Anchi Amperex Technology Ltd
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Jiangxi Anchi Amperex Technology Ltd
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Priority to CN201811153141.1A priority Critical patent/CN109188288A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07CPOSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/34Sorting according to other particular properties
    • B07C5/344Sorting according to other particular properties according to electric or electromagnetic properties
    • 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
    • H01M10/0404Machines for assembling batteries

Abstract

The present invention relates to a kind of power battery self discharge detection and stepping techniques, and its step are as follows: carrying out partial volume to the battery after chemical conversion, record discharge capacity is C1;High temperature ageing is carried out to the battery after partial volume, aging temperature is 40 ~ 80 DEG C, and ageing time is 3 ~ 7 days;Capacity retention ratio test is carried out to the battery of high temperature ageing, record discharge capacity is C2, calculate the ratio K of C2/C1, the biggish battery of self discharge is selected by K value and stepping is carried out to remaining battery, the battery of the K≤R is the big battery of self discharge, that is battery of the K between R ~ 100 is divided into N grades according to K value by unqualified battery;Battery after stepping is subjected to outbound by gear.The biggish battery of self discharge can be quickly and effectively picked out, different shelves is divided the cell into while detection, saves the stepping process of mould group combo section.

Description

A kind of power battery self discharge detection and stepping technique
Technical field
The present invention relates to the screening of lithium ion battery and combo, more particularly to a kind of detection of lithium ion battery self discharge and Combo technique.
Background technique
Lithium battery is increasingly used on the products such as mobile phone, electric tool.Due to single lithium battery voltage and appearance Measure lower, therefore muti-piece lithium battery must be together in series to reach the requirement of these tools by while applying on tool.This With regard to needing the consistency of these concatenated single batteries very high.
Battery with external circuit when not connecting, the loss of battery capacity caused by being reacted by internal polarization, commonly referred to as certainly Electric discharge.Indicate that the self discharge of such as various lithium ion batteries is all seldom, monthly about 1- with capacity percentage that is annual or monthly losing 2%, metal hydride battery is then larger up to monthly 10% or more.Due to the uncertainty and various productions of production process Process it is uncontrollable, the battery that there is manufacturing defect on a small quantity is constantly present, the numerical value of self discharge attribute often exceed with batch electricity Pond several times, when these abnormal batteries and normal battery together in series and parallel for circuit power supply when, often will cause whole group power supply electricity The performance on road declines.Therefore the battery of those self discharge attribute abnormals is filtered out.
In lithium battery production technology, at present there are two types of the modes of screening battery: 1, battery is charged to half electric state, storage one It is selected after the section time, is exactly that the flat section of voltage is selected, but battery, in this section, voltage and volume change are unknown It is aobvious, it is difficult to pick out, and required storage time is long;2, it is discharged after battery partial volume and (discharges into 2.0 or 2.5V), After storing a period of time, detection bounce voltage is selected, and this method storage time is short, can shorten flow time, but this method More demanding to product processing consistency, battery discharge procedure, which will lead to a part of battery since polarized state is inconsistent, to be led to It crosses bounce voltage and judges self discharge.
Patent 2014103502724 discloses a kind of lithium battery self discharge screening technique, which carries out lithium battery pre- Charging is melted into and records battery total capacity C1;Battery is subjected to constant temperature aging;The battery after aging is taken under normal temperature environment Constant-current discharge records the appearance after constant-current discharge after capacity C 2 and charging then by battery with same constant current charging respectively Measure C3;1=C2-C1 of capacity difference δ is calculated, then calculates K1=δ 1/T1;K1 is flowed directly into subsequent processing in acceptability limit; The battery that will normally circulate carries out constant temperature aging;The battery after aging is subjected to constant-current discharge at normal temperatures and pressures, record is completed to put Capacity C 4 after electricity;2=C4-C3 of δ is calculated, then calculates K2=δ 2/T2, battery of the K2 in technique acceptability limit is the small electricity of self discharge Pond, the invention effectively pick out the big lithium of self discharge by twice screening using the variation of battery capacity within a certain period of time Battery, processing step is complicated, and screening time is long.
Patent 201,410,801,779 7 discloses a kind of lead-acid accumulator chemical conversion combo technique, the invention will complete assembly, The battery being internalized into repeats charge and discharge several times;Modified constant-voltage charge is carried out to battery, battery is carried out taking out acid in the process; After the completion of taking out acid, rubber cap is covered at acid-filling mouth, one group of battery is connected, and constant-current discharge to average voltage reaches termination electricity Pressure, and record discharge time;The battery pack that discharge time difference is less than setting value is classified as one grade, detects cell voltage, it will be same The battery of shelves carries out combo according to voltage;It after the completion of combo, charges to battery pack, which chooses in the flat section of voltage Battery is selected, but battery, in this section, voltage and volume change are unobvious, are difficult to pick out, and required storage It is long to deposit the time.
Summary of the invention
The one kind provided the purpose of the present invention is to solve the deficiency of the prior art can be selected in a short time to be come from Discharge big battery, and the battery combo for avoiding self discharge big causes the inconsistent of whole group battery into battery pack, and then improves electricity The service life of pond group, by battery stepping, saves the stepping process of combo section while selecting self discharge.
To achieve the purpose of the present invention, the technical solution adopted by the present invention are as follows:
A kind of power battery self discharge detection and stepping technique, its step are as follows:
(1) partial volume is carried out to the battery after chemical conversion, record discharge capacity is C1;
(2) high temperature ageing is carried out to the battery after partial volume, aging temperature is 40 ~ 80 DEG C, and ageing time is 3 ~ 7 days;
(3) capacity retention ratio test being carried out to the battery of high temperature ageing, record discharge capacity is C2, the ratio K of C2/C1 is calculated, The biggish battery of self discharge is selected by K value and stepping is carried out to remaining battery, and the battery of the K≤R is the big electricity of self discharge Battery of the K between R ~ 100 is divided into N grades according to K value by pond, i.e. unqualified battery;
(4) battery after stepping is subjected to outbound by gear.
Preferably, R is 85%-95%.
Preferably, N >=2.
Preferably, battery the partial volume technique of step (1): is shelved 5min when power battery is ferric phosphate lithium cell;With 0.3C constant-current constant-voltage charging to 3.65V, electric current to 0.05C ends;Shelve 5min;With 0.3C constant-current discharge to 2.0V, capacity note For C1;Shelve 5min;0.3C constant-current constant-voltage charging to 3.65V, electric current to 0.05C ends.
Preferably, battery the partial volume technique of step (1): is shelved 5min when power battery is ternary battery;With 0.3C Constant-current constant-voltage charging to 4.2V, electric current to 0.05C ends;Shelve 5min;With 0.3C constant-current discharge to 2.8V, capacity is denoted as C1; Shelve 5min;0.3C constant-current constant-voltage charging to 4.2V, electric current to 0.05C ends.
Preferably, with 0.3C constant-current discharge to 2.0V, capacity is denoted as C2 when power battery is ferric phosphate lithium cell.
Preferably, with 0.3C constant-current discharge to 2.8V, capacity is denoted as C2 when power battery is ternary battery.
Preferably, step (1) is identical with the environment temperature of step (3), it is 20 ~ 40 DEG C.
Beneficial effects of the present invention: the biggish battery of self discharge can be quickly and effectively picked out, avoids self discharge biggish When battery and normal battery are connected together for circuit power supply, the performance decline and shakiness of whole group power supply circuit often will cause It is fixed;Different shelves can be divided the cell into while detection, save the stepping process of mould group combo section, the battery of same class Performance is close, so that battery life is longer, performance is more stable;Detection cycle is short, and method is simply easily realized, production operation side Just, production efficiency is improved.
Specific embodiment
In order to be more clear goal of the invention of the invention, technical solution and its advantageous effects, below in conjunction with comparing The present invention will be described in further detail with specific embodiment for example.It should be understood that the specific implementation of this specification description Example is not intended to limit the present invention merely to the explanation present invention.
Comparative example 1(is originated from patent 2014103502724)
(1) battery standing for having infused electrolyte starts precharge chemical conversion after a certain period of time, and battery always holds after record precharge chemical conversion C1 is measured,;
(2) battery after precharge chemical conversion is placed in 48-52 DEG C of constant temperature normal pressure workshop aging, ageing time T1 is 2-3 It;
(3) after ageing time arrives, by battery taking-up, placement certain time is down to battery temperature sufficiently often at normal temperatures and pressures Under temperature state;
(4) take constant-current discharge to its voltage value to stop after V1 on the battery under normal temperature environment, then by battery with same The stopping when constant current charging of sample to blanking voltage is V2, cut-off current is I;Then while after recording constant-current discharge respectively hold Capacity C 3 after measuring C2 and charging;
(5) capacity difference δ 1=C2-C1 is calculated, then calculates capacity according to ageing time and changes with time value K1=δ 1/T1;
K1 is chosen beyond the battery of process specifications and individually circulates and makees downgrade processing, direct stream of the K1 in acceptability limit Go to subsequent processing;
(6) normal circulation battery is placed again into 48-52 DEG C of constant temperature normal pressure workshop and shelves T2 duration aging, T2 range is 2-3 days;
(7) after the T2 time arrives, battery is taken out and places certain time at normal temperatures and pressures battery temperature is made sufficiently to be down to room temperature Under state;
(8) this battery is subjected to constant-current discharge again, discharge processes are identical as discharge processes in step (4), and record is completed to put Capacity C 4 after electricity;
(9) it calculates capacity difference δ 2=C4-C3, then calculates capacity according to the time is shelved and change with time value K2=δ 2/T2;It will K2 chooses beyond the battery of process specifications individually circulates and makees downgrade processing, and battery of the K2 in technique acceptability limit is certainly Discharge small battery.
Embodiment 1
The present invention provides a kind of power battery self discharge detection and stepping technique, specifically includes the following steps:
(1) partial volume is carried out to the battery after chemical conversion, record discharge capacity is C1;
(2) high temperature ageing is carried out to the battery after partial volume, aging temperature is 40 ~ 80 DEG C, and ageing time is 3 ~ 7 days;
(3) capacity retention ratio test being carried out to the battery of high temperature ageing, record discharge capacity is C2, the ratio K of C2/C1 is calculated, The biggish battery of self discharge is selected by K value and stepping is carried out to remaining battery, and the battery of the K≤R is the big electricity of self discharge Battery of the K between R ~ 100 is divided into N grades according to K value by pond, i.e. unqualified battery;
(4) battery after stepping is subjected to outbound by gear.
Wherein R is 85%-95%.
Wherein N >=2.
Wherein when power battery is ferric phosphate lithium cell, battery the partial volume technique of step (1): is shelved into 5min;With 0.3C constant-current constant-voltage charging to 3.65V, electric current to 0.05C ends;Shelve 5min;With 0.3C constant-current discharge to 2.0V, capacity note For C1;Shelve 5min;0.3C constant-current constant-voltage charging to 3.65V, electric current to 0.05C ends.
Wherein when power battery is ternary battery, battery the partial volume technique of step (1): is shelved into 5min;With 0.3C perseverance Constant-voltage charge is flowed to 4.2V, and electric current to 0.05C ends;Shelve 5min;With 0.3C constant-current discharge to 2.8V, capacity is denoted as C1;It puts Set 5min;0.3C constant-current constant-voltage charging to 4.2V, electric current to 0.05C ends.
Wherein when power battery is ferric phosphate lithium cell, with 0.3C constant-current discharge to 2.0V, capacity is denoted as C2.
Wherein when power battery is ternary battery, with 0.3C constant-current discharge to 2.8V, capacity is denoted as C2.
Wherein step (1) is identical with the environment temperature of step (3), is 20 ~ 40 DEG C.
Comparative examples 1 and embodiment 1, which can be seen that, uses present invention process step few, easy to operate, does not need to pass through Twice screening can effectively pick out the big lithium battery of self discharge, can shorten detection time, and measurement result more may be used It leans on, it is practical and efficient, accurate and effective is tested, product quality is substantially increased, self discharge big battery is avoided to influence the one of whole group battery Cause property, to extend the service life of battery pack.
Comparative example 2(is originated from patent 2014108017797)
(1) battery completing assembly, being internalized into is repeated into charge and discharge several times;
(2) modified constant-voltage charge is carried out to battery, battery is carried out taking out acid in the process;
(3) after the completion of taking out acid, rubber cap is covered at acid-filling mouth, one group of battery is connected, and constant-current discharge to average voltage reaches Final voltage, and record discharge time;
(4) battery pack that discharge time difference is less than setting value is classified as one grade, detects cell voltage, by the battery of same shelves according to Voltage carries out combo;
(5) it after the completion of combo, charges to battery pack,
Described be internalized into include:
(1) 0 .05C amperes of .02C~0 charging 1h~2h, after stand 0 .5h;
(2) 0 .30C amperes of .20C~0 charging 2h~3h, after stand 2h;
(3) 0 .20C amperes of charging 9h~10 .30C amperes of .25C~0 charging 2h~3h, 0 .15C~0, after stand 2h;
(4) 0 .15C amperes of .10C~0 charging 3h~4h,
The setting value is 40s.
Embodiment 2
(1) partial volume is carried out to the battery after chemical conversion, record discharge capacity is C1;
(2) high temperature ageing is carried out to the battery after partial volume, aging temperature is 40 ~ 80 DEG C, and ageing time is 3 ~ 7 days;
(3) capacity retention ratio test being carried out to the battery of high temperature ageing, record discharge capacity is C2, the ratio K of C2/C1 is calculated, The biggish battery of self discharge is selected by K value and stepping is carried out to remaining battery, and the battery of the K≤R is the big electricity of self discharge Battery of the K between R ~ 100 is divided into N grades according to K value by pond, i.e. unqualified battery;
(4) battery after stepping is subjected to outbound by gear.
Wherein R is 85%-95%.
Wherein N >=2.
Wherein when power battery is ferric phosphate lithium cell, battery the partial volume technique of step (1): is shelved into 5min;With 0.3C constant-current constant-voltage charging to 3.65V, electric current to 0.05C ends;Shelve 5min;With 0.3C constant-current discharge to 2.0V, capacity note For C1;Shelve 5min;0.3C constant-current constant-voltage charging to 3.65V, electric current to 0.05C ends.
Wherein when power battery is ternary battery, battery the partial volume technique of step (1): is shelved into 5min;With 0.3C perseverance Constant-voltage charge is flowed to 4.2V, and electric current to 0.05C ends;Shelve 5min;With 0.3C constant-current discharge to 2.8V, capacity is denoted as C1;It puts Set 5min;0.3C constant-current constant-voltage charging to 4.2V, electric current to 0.05C ends.
Wherein when power battery is ferric phosphate lithium cell, with 0.3C constant-current discharge to 2.0V, capacity is denoted as C2.
Wherein when power battery is ternary battery, with 0.3C constant-current discharge to 2.8V, capacity is denoted as C2.
Wherein step (1) is identical with the environment temperature of step (3), is 20 ~ 40 DEG C.
Comparative examples 2 and embodiment 2 can be seen that the comparative example and select battery in the flat section of voltage, but electric In this section, voltage and volume change are unobvious in pond, are difficult to pick out, and required storage time is long.This hair Bright is the ratio according to battery through discharge capacity before and after aging to screen battery, and technique is few, easy to operate, when can shorten detection Between, and measurement result is relatively reliable, and it is practical and efficient, accurate and effective is tested, product quality is substantially increased, avoids self discharge big Battery influences whole group battery with two side terminals, to extend the service life of battery pack.
According to the disclosure and teachings of the above specification, fields of the present invention obtain technical staff can also be to above-mentioned implementation Mode is changed and is modified, and therefore, the present invention is not limited to above-mentioned specific embodiment, all those skilled in the art Any conspicuous improvement, the replacement or modification that member is made on the basis of the present invention belong to protection model of the invention It encloses.

Claims (8)

1. a kind of power battery self discharge detection and stepping technique, which comprises the following steps:
(1) partial volume is carried out to the battery after chemical conversion, record discharge capacity is C1;
(2) high temperature ageing is carried out to the battery after partial volume, aging temperature is 40 ~ 80 DEG C, and ageing time is 3 ~ 7 days;
(3) capacity retention ratio test being carried out to the battery of high temperature ageing, record discharge capacity is C2, the ratio K of C2/C1 is calculated, The biggish battery of self discharge is selected by K value and stepping is carried out to remaining battery, and the battery of the K≤R is the big electricity of self discharge Battery of the K between R ~ 100 is divided into N grades according to K value by pond, i.e. unqualified battery;
(4) battery after stepping is subjected to outbound by gear.
2. power battery self discharge detection as described in claim 1 and stepping technique, which is characterized in that the R is 85%- 95%。
3. power battery self discharge detection as described in claim 1 and stepping technique, which is characterized in that N >=2.
4. power battery self discharge detection as described in claim 1 and stepping technique, which is characterized in that when power battery is phosphorus When sour lithium iron battery, battery the partial volume technique of the step (1): is shelved into 5min;With 0.3C constant-current constant-voltage charging to 3.65V, Electric current to 0.05C end;Shelve 5min;With 0.3C constant-current discharge to 2.0V, capacity is denoted as C1;Shelve 5min;0.3C constant current is permanent Pressure charges to 3.65V, and electric current to 0.05C ends.
5. power battery self discharge detection as described in claim 1 and stepping technique, which is characterized in that when power battery is three When first battery, battery the partial volume technique of the step (1): is shelved into 5min;With 0.3C constant-current constant-voltage charging to 4.2V, electric current is extremely 0.05C cut-off;Shelve 5min;With 0.3C constant-current discharge to 2.8V, capacity is denoted as C1;Shelve 5min;0.3C constant-current constant-voltage charging To 4.2V, electric current to 0.05C ends.
6. power battery self discharge detection as described in claim 1 and stepping technique, which is characterized in that when power battery is phosphorus When sour lithium iron battery, with 0.3C constant-current discharge to 2.0V, capacity is denoted as C2.
7. power battery self discharge detection as described in claim 1 and stepping technique, which is characterized in that when power battery is three When first battery, with 0.3C constant-current discharge to 2.8V, capacity is denoted as C2.
8. power battery self discharge detection as described in claim 1 and stepping technique, which is characterized in that the step (1) and The environment temperature of step (3) is identical, is 20 ~ 40 DEG C.
CN201811153141.1A 2018-09-30 2018-09-30 A kind of power battery self discharge detection and stepping technique Pending CN109188288A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110444826A (en) * 2019-07-05 2019-11-12 联动天翼新能源有限公司 The forming and capacity dividing method of lithium battery
CN110632529A (en) * 2019-10-08 2019-12-31 湖南华兴新能源科技有限公司 Lithium battery self-discharge testing process

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5961785A (en) * 1982-09-02 1984-04-09 Polaroid Corp Method and device for inspecting and sorting battery of pro-duction lot
CN101907688A (en) * 2010-08-02 2010-12-08 天津力神电池股份有限公司 Method for detecting electrical property consistency of lithium ion battery
CN102109580A (en) * 2011-01-30 2011-06-29 白科 Process for detecting self discharge of lithium iron phosphate battery
CN103769374A (en) * 2012-10-22 2014-05-07 北汽福田汽车股份有限公司 Sorting method of lithium ion batteries
CN105609889A (en) * 2015-12-17 2016-05-25 中天储能科技有限公司 Rapid formation and grading method for cylindrical lithium battery
CN105633472A (en) * 2015-12-30 2016-06-01 山东精工电子科技有限公司 Self-discharge rate consistency matching and screening method for lithium-ion battery
CN108051751A (en) * 2017-11-25 2018-05-18 合肥国轩高科动力能源有限公司 A kind of lithium-ion-power cell method for separating and system
CN108246658A (en) * 2017-12-12 2018-07-06 合肥国轩高科动力能源有限公司 A kind of method of ferric phosphate lithium cell conformity classification
CN108393279A (en) * 2018-02-02 2018-08-14 合肥国轩高科动力能源有限公司 A kind of method of lithium ion battery self discharge screening

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5961785A (en) * 1982-09-02 1984-04-09 Polaroid Corp Method and device for inspecting and sorting battery of pro-duction lot
CN101907688A (en) * 2010-08-02 2010-12-08 天津力神电池股份有限公司 Method for detecting electrical property consistency of lithium ion battery
CN102109580A (en) * 2011-01-30 2011-06-29 白科 Process for detecting self discharge of lithium iron phosphate battery
CN103769374A (en) * 2012-10-22 2014-05-07 北汽福田汽车股份有限公司 Sorting method of lithium ion batteries
CN105609889A (en) * 2015-12-17 2016-05-25 中天储能科技有限公司 Rapid formation and grading method for cylindrical lithium battery
CN105633472A (en) * 2015-12-30 2016-06-01 山东精工电子科技有限公司 Self-discharge rate consistency matching and screening method for lithium-ion battery
CN108051751A (en) * 2017-11-25 2018-05-18 合肥国轩高科动力能源有限公司 A kind of lithium-ion-power cell method for separating and system
CN108246658A (en) * 2017-12-12 2018-07-06 合肥国轩高科动力能源有限公司 A kind of method of ferric phosphate lithium cell conformity classification
CN108393279A (en) * 2018-02-02 2018-08-14 合肥国轩高科动力能源有限公司 A kind of method of lithium ion battery self discharge screening

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110444826A (en) * 2019-07-05 2019-11-12 联动天翼新能源有限公司 The forming and capacity dividing method of lithium battery
CN110632529A (en) * 2019-10-08 2019-12-31 湖南华兴新能源科技有限公司 Lithium battery self-discharge testing process

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