CN109622426A - A kind of battery consistency screening technique and battery consistency screening plant - Google Patents
A kind of battery consistency screening technique and battery consistency screening plant Download PDFInfo
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- CN109622426A CN109622426A CN201811613606.7A CN201811613606A CN109622426A CN 109622426 A CN109622426 A CN 109622426A CN 201811613606 A CN201811613606 A CN 201811613606A CN 109622426 A CN109622426 A CN 109622426A
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- 238000012216 screening Methods 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000001914 filtration Methods 0.000 claims abstract description 7
- 239000000178 monomer Substances 0.000 claims description 8
- 230000000007 visual effect Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052744 lithium Inorganic materials 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting 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
- B07C5/34—Sorting according to other particular properties
- B07C5/344—Sorting according to other particular properties according to electric or electromagnetic properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting 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
- B07C5/34—Sorting according to other particular properties
Abstract
The invention discloses a kind of battery consistency screening technique and battery consistency screening plants, are related to technical field of lithium batteries.Charge and discharge will be carried out after multiple battery cells series connection in battery pack first, and voltage detecting is carried out to each battery cell, the battery cell that wherein voltage's distribiuting peels off then is filtered out according to voltage detecting result.Compared with prior art, battery consistency screening technique provided by the invention is due to using the step of filtering out the battery cell that wherein voltage's distribiuting peels off according to voltage detecting result, so can rapidly realize that battery with two side terminals screens, it is applied widely, screening cost is low, practical and efficient.
Description
Technical field
The present invention relates to technical field of lithium batteries, in particular to a kind of battery consistency screening technique and battery
Conformity classification device.
Background technique
Currently, the problem of application scenarios that retired power battery echelon utilizes are boundless, and echelon utilizes and difficult point are
Cost and safety, in terms of the management and security control that especially show battery consistency.
Now to the screening technique of battery consistency, the main the following two kinds mode that uses: 1. rely on the retrospect of every battery core
Detailed complete period operation data pair before coding and the battery saved from the remote monitoring server of system operation are retired
Battery consistency is screened, and regrettably before national relevant laws and regulations standard publication, many power batteries are not in the market
Retrospect coding and long-range monitoring system are established, therefore this method is not applied for all power batteries.2. a whole set of battery is torn open
At single battery core or minimum modulus group, all then upper test cabinet test according to test data (voltage, capacity, internal resistance solution
Deng) screened, process is matched in the screening before similar new battery core PACK, disadvantage is that will lead to echelon using production and
Testing cost it is unprecedented soaring, disagreed with the original intention that echelon utilizes, and disassemble process there are biggish security risk and rings
Border pollution hidden trouble.
In view of this, designing a kind of conveniently battery consistency screening technique and battery consistency screening plant
Especially it is particularly important in battery production.
Summary of the invention
The purpose of the present invention is to provide a kind of battery consistency screening techniques, and step is simple, easy to operate, can be quick
Battery with two side terminals screening is realized on ground, and applied widely, screening cost is low, practical and efficient.
Another object of the present invention is to provide a kind of battery consistency screening plants, and structure is simple, can be rapidly real
Existing battery with two side terminals screening, applied widely, screening cost is low, practical and efficient, securely and reliably.
The present invention is that it is realized by adopting the following technical scheme.
A kind of battery consistency screening technique, for filtering out the battery cell of consistency difference in battery pack, battery is consistent
Property screening technique include: that will carry out charge and discharge after multiple battery cells series connection in battery pack, and carry out to each battery cell
Voltage detecting；The battery cell that wherein voltage's distribiuting peels off is filtered out according to voltage detecting result.
Further, charge and discharge will be carried out after multiple battery cells series connection in battery pack, and to each battery cell into
Before the step of row voltage detecting, battery consistency screening technique further includes the battery for rejecting appearance breakage in battery pack by visual observation
Monomer.
Further, charge and discharge will be carried out after multiple battery cells series connection in battery pack, and to each battery cell into
The step of row voltage detecting includes: discharge step: by multiple battery cell constant-current discharges to any battery list under preset temperature
The voltage of body reaches default discharge cut-off voltage, and shelves the first preset time period；Charge step: will be multiple under preset temperature
The voltage of battery cell constant-current charge to any battery monomer reaches preset charged blanking voltage, and shelves the second preset time
Section.
Further, before discharge step, charge and discharge will be carried out after multiple battery cells series connection in battery pack, and to each
The step of battery cell progress voltage detecting further includes that multiple battery cells are shelved third preset time period under preset temperature.
Further, the first preset time period, the second preset time period and third preset time period are equal.
Further, after charge step, charge and discharge will be carried out after multiple battery cells series connection in battery pack, and to each
It further includes reignition step and charge step at least one times that battery cell, which carries out the step of voltage detecting,.
Further, preset temperature is 25 DEG C, and it is 180A that the electric current in discharge step and charge step is permanent.
Further, presetting discharge cut-off voltage is 2.5V, and preset charged blanking voltage is 3.65V.
Further, the step of filtering out the battery cell that wherein voltage's distribiuting peels off according to voltage detecting result include:
Dynamic electric voltage distribution map is obtained as a result, drawing according to the voltage detecting of battery cell；By the dynamic electric voltage of multiple battery cells point
Butut is compared after summarizing, and filters out the battery cell wherein to peel off.
A kind of battery consistency screening plant, for implementing above-mentioned battery consistency screening technique, battery consistency sieve
Screening device includes industrial personal computer and charge and discharge device, and industrial personal computer is connect with charge and discharge device, and charge and discharge device is used for and multiple batteries
Monomer series-connected, industrial personal computer with multiple battery cells for connecting respectively.
Battery consistency screening technique and battery consistency screening plant provided by the invention have the advantages that
Battery consistency screening technique provided by the invention will carry out after multiple battery cells series connection in battery pack first
Charge and discharge, and to each battery cell carry out voltage detecting, then according to voltage detecting result filter out wherein voltage's distribiuting from
The battery cell of group.Compared with prior art, battery consistency screening technique provided by the invention is due to using according to voltage
Testing result filters out the step of battery cell that wherein voltage's distribiuting peels off, so battery with two side terminals can be realized rapidly
Screening, applied widely, screening cost is low, practical and efficient.
Battery consistency screening plant provided by the invention, for implementing battery consistency screening technique, structure is simple,
It can rapidly realize that battery with two side terminals screens, applied widely, screening cost is low, and it is practical and efficient, securely and reliably.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the structural schematic diagram of battery consistency screening plant provided in an embodiment of the present invention；
Fig. 2 is multiple battery cells that industrial personal computer obtains in battery consistency screening plant provided in an embodiment of the present invention
Dynamic electric voltage is distributed summary view (before rejecting)；
Fig. 3 is multiple battery cells that industrial personal computer obtains in battery consistency screening technique provided in an embodiment of the present invention
Dynamic electric voltage is distributed summary view (after rejecting)；
Fig. 4 is the step block diagram of battery consistency screening technique provided in an embodiment of the present invention.
Icon: 100- battery consistency screening plant；110- industrial personal computer；120- charge and discharge device；200- battery pack；210-
Battery cell.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be noted that the instructions such as term "inner", "outside", "upper", "lower", "horizontal"
Orientation or positional relationship be based on the orientation or positional relationship shown in the drawings or the invention product using when usually put
Orientation or positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device of indication or suggestion meaning or
Element must have a particular orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.This
Outside, term " first ", " second ", " third " etc. are only used for distinguishing description, are not understood to indicate or imply relative importance.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" connected ", " installation ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be indirect by intermediary
It is connected, can be the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in the present invention.
With reference to the accompanying drawing, it elaborates to some embodiments of the present invention.In the absence of conflict, following
Feature in embodiment can be combined with each other.
Embodiment
Incorporated by reference to referring to FIG. 1, FIG. 2 and FIG. 3, the embodiment of the invention provides a kind of battery consistency screening plants 100, use
In the battery cell 210 for filtering out consistency difference in battery pack 200.Its structure is simple, can rapidly realize the consistent of battery
Property screening, applied widely, screening cost is low, practical and efficient, securely and reliably.It should be noted that battery pack 200 includes multiple
Battery cell 210, battery pack 200, due to the consume of internal cell monomer 210, lead to battery pack after using certain time limit
200 are unable to satisfy the requirement for continuing to use, and need to do retired processing.The battery consistency screening plant 100 is used to eliminate to retired
Battery pack 200 carry out conformity classification, the battery cell 210 of consistency difference in battery pack 200 is rejected, reservation battery pack
The good battery cell 210 of consistency in 200, in order to carry out echelon using processing.
Battery consistency screening plant 100 includes industrial personal computer 110 and charge and discharge device 120.Charge and discharge device 120 be used for
Multiple battery cells 210 are connected, and charge and discharge device 120 can carry out charge or discharge to multiple battery cells 210 simultaneously.Work
Control machine 110 is connect with charge and discharge device 120, to control the electric current or voltage of charge and discharge.Industrial personal computer 110 for respectively with it is multiple
Battery cell 210 connects, to detect each battery cell 210 in the voltage of charge and discharge process, thus according to voltage detecting result
The battery cell 210 that wherein voltage's distribiuting peels off is filtered out, which is the battery cell 210 of consistency difference, is needed
It is rejected from battery pack 200, to effectively improve the voltage consistency of battery pack 200.
In the present embodiment, for eliminating a set of lithium iron phosphate dynamic battery group 200 got off on certain electric bus into
Row explanation, the battery pack 200 include 180 battery cells 210, and charge and discharge device 120 and 180 battery cell 210 is connected, with
Guarantee that 180 battery cells 210 carry out charge or discharge under constant current state, by the dynamic electric voltage of 180 battery cells 210
Distribution map is gathered together, and filters out the battery cell 210 wherein obviously to peel off by observation, specifically, hence it is evident that the electricity to peel off
The quantity of pond monomer 210 is one, and the consistency of the battery pack 200 after which is rejected is preferable.
Referring to figure 4., the embodiment of the invention also provides a kind of battery consistency screening techniques, are applied to battery consistency
Screening plant 100, the battery consistency screening technique step is simple, easy to operate, can rapidly realize battery with two side terminals
Screening, applied widely, screening cost is low, practical and efficient.
The battery consistency screening technique the following steps are included:
Step S101: the battery cell 210 of appearance breakage in battery pack 200 is rejected by visual observation.
It is worth noting that, in step s101, observing multiple battery cells 210 in battery pack 200, manually
Reject wherein appearance breakage, the battery cell 210 that blow-up, leakage or connection component damage, with to multiple battery cells 210 into
Row preliminary screening retains apparently sound battery cell 210.
Step S102: charge and discharge are carried out after multiple battery cells 210 in battery pack 200 are connected, and to each battery
Monomer 210 carries out voltage detecting.
Specifically, step S102 includes three steps, is respectively as follows:
Step S1021: multiple battery cells 210 are shelved into third preset time period under preset temperature.
It is worth noting that, shelve multiple battery cells 210 under preset temperature in step S1021, so that
Multiple battery cells 210 adapt to temperature environment, prevent from causing shadow due to performance of the temperature change to battery cell 210
It rings, the situation for avoiding detection voltage inaccuracy occurs.
Step S1022: discharge step, by multiple 210 constant-current discharges of battery cell to any battery list under preset temperature
The voltage of body 210 reaches default discharge cut-off voltage, and shelves the first preset time period.
It is worth noting that, being carried out simultaneously to multiple battery cells 210 in step S1022 using charge and discharge device 120
Electric discharge operation, until the voltage of any one battery cell 210 reaches default discharge cut-off voltage.In the present embodiment, when certain
When the voltage of one battery cell 210 reaches default discharge cut-off voltage, charge and discharge device 120 stops to multiple battery cells
210 electric discharge operation, and multiple battery cells 210 are shelved into the first preset time period, so that multiple battery cells 210 are discharging
Environment is adapted to afterwards, avoids having an impact the voltage change during subsequent charge.Specifically, the default electric discharge cut-off
Voltage is 2.5V, it is not limited to this, default discharge cut-off voltage needs are determined according to actual battery model, to default
Discharge cut-off voltage is not especially limited.
Step S1023: charge step, by multiple 210 constant-current charges of battery cell to any battery list under preset temperature
The voltage of body 210 reaches preset charged blanking voltage, and shelves the second preset time period.
It is worth noting that, being carried out simultaneously to multiple battery cells 210 in step S1023 using charge and discharge device 120
Charging operation, until the voltage of any one battery cell 210 reaches preset charged blanking voltage.In the present embodiment, when certain
When the voltage of one battery cell 210 reaches preset charged blanking voltage, charge and discharge device 120 stops to multiple battery cells
210 charging operation, and multiple battery cells 210 are shelved into the second preset time period, so that multiple battery cells 210 are charging
Environment is adapted to afterwards, avoids having an impact the voltage change during after discharge.Specifically, which ends
Voltage is 3.65V, it is not limited to this, preset charged blanking voltage needs are determined according to actual battery model, to pre-
If charge cutoff voltage is not especially limited.
It in the present embodiment, after step S1023, repeats and carries out a step S1022 and step S1023, to guarantee
Voltage detecting is accurate, convenient for accurately filtering out the battery cell 210 of consistency difference.It is not limited to this, in other implementations
In example, after step S1023, it can be not repeated to carry out step S1022 and step S1023, can also repeat twice
Step S1022 and step S1023 is not especially limited the number that repeats of step S1022 and step S1023.
It should be noted that in the present embodiment, the first preset time period, the second preset time period and third preset time period
Be equal, and be 5 minutes, to avoid as shelve the time it is not equal and caused by influence to the performance of battery cell 210.But
It is not limited to that, the first preset time period, the second preset time period and third preset time period can also be 6 minutes, right
The length of first preset time period, the second preset time period and third preset time period is not especially limited.
In the present embodiment, preset temperature is 25 DEG C, it is not limited to this, preset temperature may be 20 DEG C, to default
The size of temperature is not especially limited.Charge and discharge device 120 and multiple 210 shapes of battery cell in step S1022 and step S1023
At series circuit in electric current it is permanent be 180A, it is not limited to this, electric current in the series circuit can also perseverance be
160A is not especially limited the size of electric current in the series circuit.
It is worth noting that, in entire step S102, using industrial personal computer 110 to the voltage of multiple battery cells 210 into
Row real-time detection obtains the voltage detecting of multiple battery cells 210 as a result, and being stored in industrial personal computer 110.
Step S103: the battery cell 210 that wherein voltage's distribiuting peels off is filtered out according to voltage detecting result.
Specifically, step S103 includes two steps, is respectively as follows:
Step S1031: dynamic electric voltage distribution map is obtained as a result, drawing according to the voltage detecting of battery cell 210.
It is worth noting that, the voltage detecting result of battery cell 210 is drawn using industrial personal computer 110 in step S1031
Curve graph, as dynamic electric voltage distribution map is made, is drawn to form multiple move according to the voltage detecting result of multiple battery cells 210
State voltage distribution graph.
Step S1032: it is compared, is filtered out wherein after the dynamic electric voltage distribution map of multiple battery cells 210 is summarized
The battery cell 210 to peel off.
It is worth noting that, the track of most of dynamic electric voltage distribution map is consistent in step S1032, hence it is evident that de-
Dynamic electric voltage distribution map from the track is the dynamic electric voltage distribution map of the battery cell 210 to peel off, according to by the dynamic electric
Pressure distribution map finds out corresponding battery cell 210, that is, completes the screening operation to the battery cell 210 of consistency difference.
Battery consistency screening technique provided in an embodiment of the present invention, first by multiple battery cells in battery pack 200
Charge and discharge are carried out after 210 series connection, and voltage detecting is carried out to each battery cell 210, are then screened according to voltage detecting result
The battery cell 210 that wherein voltage's distribiuting peels off out.Compared with prior art, battery consistency screening technique provided by the invention
Due to using the step of filtering out battery cell 210 that wherein voltage's distribiuting peels off according to voltage detecting result, so can
Rapidly realize battery with two side terminals screening, applied widely, screening cost is low, and it is practical and efficient, so that battery consistency screens
Device 100 stablize it is practical, securely and reliably.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of battery consistency screening technique, for filtering out the battery cell of consistency difference in battery pack, which is characterized in that
The battery consistency screening technique includes:
Charge and discharge will be carried out after multiple battery cells series connection in the battery pack, and voltage inspection is carried out to each battery cell
It surveys；
The battery cell that wherein voltage's distribiuting peels off is filtered out according to voltage detecting result.
2. battery consistency screening technique according to claim 1, which is characterized in that it is described will be more in the battery pack
Charge and discharge are carried out after a battery cell series connection, and before the step of carrying out voltage detecting to each battery cell, the battery is consistent
Property screening technique further includes the battery cell for rejecting appearance breakage in the battery pack by visual observation.
3. battery consistency screening technique according to claim 1, which is characterized in that it is described will be more in the battery pack
Charge and discharge are carried out after a battery cell series connection, and the step of carrying out voltage detecting to each battery cell includes:
Discharge step: the voltage of multiple battery cell constant-current discharge to any battery monomers is reached default under preset temperature and is put
Electric blanking voltage, and shelve the first preset time period；
Charge step: the voltage of multiple battery cell constant-current charge to any battery monomers is reached pre- under the preset temperature
If charge cutoff voltage, and shelve the second preset time period.
4. battery consistency screening technique according to claim 3, which is characterized in that described to incite somebody to action before the discharge step
Charge and discharge, and the step of voltage detecting is carried out to each battery cell are carried out after multiple battery cells series connection in the battery pack
It further include that multiple battery cells are shelved into third preset time period under preset temperature.
5. battery consistency screening technique according to claim 4, which is characterized in that first preset time period, institute
It states the second preset time period and the third preset time period is equal.
6. battery consistency screening technique according to claim 3, which is characterized in that described to incite somebody to action after the charge step
Charge and discharge, and the step of voltage detecting is carried out to each battery cell are carried out after multiple battery cells series connection in the battery pack
It further include repeating the discharge step and the charge step at least one times.
7. battery consistency screening technique according to claim 3, which is characterized in that the preset temperature is 25 DEG C, institute
It is 180A that it is permanent, which to state the electric current in discharge step and the charge step,.
8. battery consistency screening technique according to claim 3, which is characterized in that the default discharge cut-off voltage is
2.5V, the preset charged blanking voltage are 3.65V.
9. battery consistency screening technique according to claim 1, which is characterized in that described to be sieved according to voltage detecting result
The step of selecting the battery cell that wherein voltage's distribiuting peels off include:
Dynamic electric voltage distribution map is obtained as a result, drawing according to the voltage detecting of battery cell；
It is compared after the dynamic electric voltage distribution map of multiple battery cells is summarized, filters out the battery cell wherein to peel off.
10. a kind of battery consistency screening plant, which is characterized in that for implementing electricity as described in any one of claim 1 to 9
Pond conformity classification method, the battery consistency screening plant include industrial personal computer and charge and discharge device, the industrial personal computer and institute
State charge and discharge device connection, the charge and discharge device for connect with multiple battery cells, the industrial personal computer be used for respectively with it is more
A battery cell connection.
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| CN201811613606.7A CN109622426A (en) | 2018-12-27 | 2018-12-27 | A kind of battery consistency screening technique and battery consistency screening plant |
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Cited By (4)
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| CN110824366A (en) * | 2019-10-28 | 2020-02-21 | 南京四象新能源科技有限公司 | Battery health state monitoring method and device and terminal equipment |
| CN111957610A (en) * | 2020-07-29 | 2020-11-20 | 河南平煤国能锂电有限公司 | Screening method for improving consistency of lithium iron phosphate battery |
| CN112068007A (en) * | 2020-07-31 | 2020-12-11 | 天津力神电池股份有限公司 | Method for detecting consistency of battery pole group |
| CN113369177A (en) * | 2021-06-21 | 2021-09-10 | 合肥国轩高科动力能源有限公司 | Screening method for lithium battery consistency |
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