CN104868184B - Battery online dynamic matching optimization method and system facing to separation-type assembly line - Google Patents

Battery online dynamic matching optimization method and system facing to separation-type assembly line Download PDF

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CN104868184B
CN104868184B CN201510229019.8A CN201510229019A CN104868184B CN 104868184 B CN104868184 B CN 104868184B CN 201510229019 A CN201510229019 A CN 201510229019A CN 104868184 B CN104868184 B CN 104868184B
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battery
combo
sorting
mechanism unit
minimum
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CN104868184A (en
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谢毅
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Zhejiang Haining Warp Knitting Industrial Park Development Co., Ltd
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Zhejiang Gongshang University
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4207Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
    • 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
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4285Testing apparatus
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Secondary Cells (AREA)

Abstract

The invention discloses a battery online dynamic matching optimization method and system facing to a separation-type assembly line. The matching optimization system comprises a machine frame, a main control computer, a first minimum mechanism unit, a second minimum mechanism unit, and a conveyor belt; the conveyor belt is erected on the upper slope surface of the machine frame so as to form a feeding region; and the first minimum mechanism unit, the second minimum mechanism unit and a connecting chute for connecting two minimum mechanism units are erected on the lower slope surface of the machine frame so as to form a matching region. The matching optimization method based on the matching optimization system comprises the steps of battery allocation, battery selection, battery convergence and the like. The battery matching method and system are capable of performing the continuous online matching optimization in the manner of assembly line automation, and improving the matching efficiency, matching success rate and matching quality of the battery.

Description

Towards the online dynamic combo optimization method of battery and system of sorting type streamline
Technical field
The present invention relates to battery detecting, sorting, combo optimisation technique field, and in particular to one kind is towards sorting type streamline The online dynamic combo optimization method of battery and system.
Background technology
Electrokinetic cell generally needs to use in groups, due to the restriction of production technology level, even with the product of batch, it is single Also can there is the difference in some performances between batteries, will often find that wherein there are a batteries during use in groups Can fall behind, and be decreased obviously whole group battery performance (such as capacity), and this phenomenon can be with the increasing of access times (time) It is more more and more obvious, it is impossible to mileages of continuation requirement to be met, so that whole group battery is scrapped or changed.This phenomenon is referred to as performance Inconsistent performance (capacity) relaxation phenomenon for causing.This phenomenon can add the use cost of large user;Cause battery manufacture producer High return of goods rate, can also make the image product of whole manufacturer be affected;Therefore its health to whole electric motor car industry Stable development has significant impact.Conversely, the concordance in a Battery pack between every batteries is preferably, then this set of cells can be made Service life is significantly improved.Therefore increasing car load manufacturer and battery manufacture producer recognize battery detecting combo Importance and necessity.Successively all using battery detecting combo as vital quality control step.Electrokinetic cell is required The characteristics of detection combo supply has become electric bicycle battery or other electrokinetic cells.Current common battery detecting combo Method is that performance parameter or the performance curve such as voltage, resistance, capacity of battery are first detected after battery manufacture is good, then basis Some or certain performance parameter or performance curve therein, are calculated, compared and are analyzed, performance is connect by packet and screening Some batteries closely (in some range of error) make set of cells have good concordance with being one group.
As the detection method for group matching of current electric bicycle battery is:First the battery to be carried out detection combo is first filled Electricity is to saturation, and (such as 18 sections or 16 sections) constant-current discharge of then being connected in battery all the way is (general when discharging close latter stage 10.8 volts are equal to for single battery average voltage) when, with equipment, simultaneously limnograph or artificial surveying record successively are every The voltage of batteries, finally magnitude of voltage deviation within the specific limits carry out combo, this mode is always by battery production Enterprise and battery are continued to use using unit, be there is process complicated and time consumption, cannot be realized streamline detection combo, combo efficiency and combo Of low quality the shortcomings of.
A kind of online dynamic combo optimization method of battery towards sorting type streamline and system are designed for this, it is right to realize Different batches, different desired batteries carry out continuous on-line detection combo optimization in the form of flowing water line automation, are effectively improved Existing method for group matching efficiency is low, human error big, the control of process complicated difficult, and the low problem of combo degree of optimization improves battery Combo efficiency, combo success rate, combo quality and whole service life, therefore its application prospect is widely.
The content of the invention
For solve existing method for group matching combo efficiency it is low, it is of low quality the problems such as, the invention provides one kind is towards sorting The online dynamic combo optimization method of the battery of formula streamline and system, the technical scheme of employing is as follows:
The online dynamic combo of battery towards sorting type streamline optimizes system, including frame, main control computer, minimum mechanism list Unit one, minimum mechanism unit two, conveyer belt;
Frame section triangle in obtuse angle, triangular base is fixed in ground, another two three arm of angle place planes point Domatic and Caused by Sloping Surfaces Wei not gone up;
The conveyer belt be erected at the frame it is upper domatic on, constitute feeding area;It is the minimum mechanism unit one, described The connection slideway of minimum mechanism unit two and the minimum mechanism unit of connection two is erected on the Caused by Sloping Surfaces of the frame, is constituted Combo area;
The minimum mechanism unit one is in herringbone, there is an access road and two exit passageways, and the two of channel interior The bottom of side and channel interior is fitted with roller, and in the junction of three passages bifurcated reject gate, the bifurcated sorting are provided with In sector, circle centre position is provided with bearing to door, and bearing is located at two exit passageway outer wall cross points, and the bifurcated reject gate is in main control computer Control under left-right rotation, the bifurcated reject gate radius is identical with channel width and in arcuation, the bifurcated reject gate center of circle Angle is less than 90 degree;
The minimum mechanism unit two has two entrances passage and one outlet passage in herringbone, channel interior The bottom of both sides and channel interior is fitted with roller, is provided with the junction of three passages and converges reject gate, described to converge point Door is selected in sector, circle centre position is provided with bearing, bearing is located at two entrances channel outer wall cross point, and the reject gate that converges is in master control Left-right rotation under the control of machine, the reject gate radius that converges is identical with channel width and in arcuation, described to converge reject gate circle Heart angle is more than 90 degree;
When described two reject gates turn to left side maximum position and the right maximum position, a fan-shaped arcuation radius with One side of the access road of connection and the exit passageway of connection is tangent, installs on two arcuation radiuses of described two reject gates There is roller;
Triple channel junction bottom in the minimum mechanism unit one and minimum mechanism unit two is provided with ball;
The connection slideway inside both sides of the connection minimum mechanism unit and interior bottom portion are designed with roller;
The minimum mechanism unit one by connection slideway can multistage-combination constitute the sorting floor in combo area, the minimum machine Structure unit two by connection slideway can multistage-combination constitute combo area converge floor;The sorting layer and to converge layer symmetrical, Sorting layer end is connected with the top for converging layer, and sorting floor top is the import of combo area, converges floor end for the outlet of combo area.
The both sides of the inside of the passage and the connection slideway, internal bottom and bifurcated reject gate and converge point The roller that two arcuation radiuses of door are provided with is selected to be changed to ball.
Further, comprised the following steps based on the battery combo optimization method of the system:
(1) battery-allocated:Reject gate in main control computer control sorting layer, makes battery be slipped to caching number of batteries minimum At sorting layer endpoint node.
(2) battery is selected:A batteries are selected from sorting layer endpoint node, with reference to Figure 11 battery selection operation algorithms It is described as follows:
Step1:Judge whether exit has the battery for waiting combo, if not going to Step2, if going to Step4;
Step2:Judge sort in layer whether have unqualified battery in endpoint node, if not going to Step3, if Go to Step5;
Step3:Judge to sort and whether have in endpoint node in layer the non-selected battery of long-time, if do not gone to Step4, if going to Step6;
Step4:Calculated and selected one of battery, algorithm to terminate according to combo optimized mathematical model;
Step5:One of those unqualified battery, algorithm is selected to terminate;
Step6:The non-selected battery of one of long-time, algorithm is selected to terminate.
(3) battery converges:Main control computer control converges the reject gate in layer, and the battery for selecting is slipped to exit, so as to Complete the sorting combo optimization of battery.
The combo optimized mathematical model is as follows:
i:From left to right number consecutively is 1 to battery numbering on sorting layer endpoint node ..., n;
m:Number of batteries needed for one Battery pack, m<n;
q:Have been enter into the number of batteries of the wait combo in exit, q<m;
k:Battery performance parameter is numbered, 1 ..., l;
The interval of acceptance of k-th battery parameter, it is interimFor virtual value lower limit,For the virtual value upper limit;
vik:K-th parameter value of i-th battery;
K-th parameter value of r-th battery for having waited in exit, r=1 ..., q;
xi:Decision variable, the selected combo of 0 or 1,1 i-th battery of expression;
α:Holdup time penalty coefficient;
ti:Holdup time of i-th battery at sorting layer endpoint node;
The weight coefficient of k-th parameter value is
δ:The consistent sex differernce limit value of battery performance;
Wherein, (1) is object function, in minimum group battery weighted average performance difference and more than special time not yet by Select the number of batteries of combo;(2) representing must be with a full Battery pack, and the number of batteries needed for a Battery pack is m;(3) represent Unqualified battery can not selected combo;(4) average of k-th parameter value with Battery pack is represented;It is flat between (5) one Battery packs Performance difference is no more than its limit value δ.
Due to the employing of above-mentioned technical proposal, compare with prior art with method, the present invention has advantages below:
1. the online dynamic battery method for group matching of pipeline system is adopted, hand labor is greatly reduced, combo efficiency is improve; The combo scheme of optimum can be in real time found out according to newest state.
2. combo area is combined and is built by minimum mechanism unit one, minimum mechanism unit two and connection slideway, structure letter It is single, different compound modes can be used according to practical situation, the combo area for adapting to different production requirements is built, with many work( Energy, modularity, it is expansible the features such as.
3. combo area is set to slope, and battery completes combo by self gravitation slide downward, during combo, nothing Need outside resources to provide power, save combo cost.
4. when reject gate turns to left side maximum position and the right maximum position, a fan-shaped arcuation radius with connect Access road and connection exit passageway one side it is tangent, it is ensured that the smoothness of channel plot, while downward in battery Roller or ball have all been installed additional during landing on all faces contacted with battery, which reducing the frictional force to battery can So that battery smooth slide downward in combo area, while decreasing the abrasion to battery.
Description of the drawings
Fig. 1 is the side schematic diagram of integrated model of the present invention;
Fig. 2 is the positive top view in combo area of the present invention;
Fig. 3 is the minimum reject gate of mechanism unit one of the invention schematic diagram placed in the middle;
Fig. 4 is the minimum reject gate of mechanism unit one of the invention schematic diagram to the left;
Fig. 5 is the minimum reject gate of mechanism unit one of the invention schematic diagram to the right;
Fig. 6 is the minimum reject gate of mechanism unit two of the invention schematic diagram placed in the middle;
Fig. 7 is the minimum reject gate of mechanism unit two of the invention schematic diagram to the left;
Fig. 8 is the minimum reject gate of mechanism unit two of the invention schematic diagram to the right;
Fig. 9 is the minimum reject gate schematic perspective view of mechanism unit one of the invention;
Figure 10 is the minimum reject gate schematic perspective view of mechanism unit two of the invention;
Figure 11 is battery selection operation algorithm flow chart of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings the invention will be further described:
As shown in figure 1, whole matching mechanism of sheet side is triangular in shape upwards, uphill section be feeding area with downhill sections be with Group area;Conveyer belt is provided with feeding area, conveyer belt can be transported to performance detection good battery 2 peak (import) in combo area Place.The positive top view in Tu2Shi combos area, battery is downward by combo area peak by self gravitation during combo Slide, in the process main control computer constantly enters Mobile state analytical calculation, control reject gate sorting direction, when battery slides to minimum point When, to prepare battery, unqualified battery or the battery more than the unfinished combo of special time of group, so as to realize that combo optimizes.
Fig. 3 and Fig. 6 are two minimum mechanism units for constituting combo sound zone system, wherein, minimum mechanism unit one is in herringbone Shape, there is an access road 1 and two exit passageways, and minimum mechanism unit two has two entrances passage 1 and in herringbone Individual exit passageway.Reject gate 3 is arranged on three-channel junction, and its shape is in sector.Such as Fig. 4, Fig. 5, Fig. 7, Fig. 8, Fig. 9, figure Shown in 10, to enable battery 2 successfully to glide, while reducing the abrasion to battery 2, two radial designs of reject gate 3 are into arc Shape, and when reject gate turns to the left side or the right maximum position, arcuation radius just with the access road for connecting and One side of the exit passageway of connection is tangent, at the same on two arcuation radiuses of reject gate and channel interior both sides and bottom all Install roller additional, in triple channel junction ball is additionally arranged at the bottom.
According to actual needs, can be assembled and constructed phase by minimum mechanism unit one, minimum mechanism unit two and connection slideway The combo area answered.When assembling builds combo area, first to determine that the rational number of plies (due to structural symmetry, sorts layer and converges The number of plies of layer is identical), if sorting layer and the number of plies for converging layer are h, allow that the largest battery number for participating in combo is every time N, then the relation between them is:N=2h.If the battery number needed with a Battery pack is m, then n should be greater than m, match somebody with somebody Group quality is directly proportional to number of plies h, and the more combo quality of the number of plies are higher.
Assume that the battery number needed with a Battery pack is m=4, according to combo quality requirement, it is determined that the sorting number of plies is h= 4, allow that the largest battery number for participating in combo is n=16 every time, build combo area as shown in Figure 2.The present invention's is worked Journey and principle are as follows:
Jing performances are (such as:Battery capacity, open-circuit voltage, internal resistance etc.) order of battery 2 of detection enters conveyer belt, when there is battery When combo area peak (import) place of mechanism is moved upward to conveyer belt, the reject gate in main control computer control sorting layer, Battery-allocated at the minimum sorting layer endpoint node of current cache number of batteries, when it is all sorting layer endpoint node reach caching Quantity(s is the time that battery is slipped to sorting layer endpoint node from peak, and t is that two neighboring battery reaches combo area The time interval of peak, sorts layer endpoint node caching quantity and has reached the node and distributed to the node but do not have It is slipped to the number of batteries sum of the node) after, operate below execution whenever having battery to reach at the peak in combo area again:
(1) battery-allocated:Reject gate in main control computer control sorting layer, makes battery be slipped to caching number of batteries minimum At sorting layer endpoint node.
(2) battery is selected:A batteries are selected from sorting layer endpoint node, with reference to Figure 11 battery selection operation algorithms It is described as follows:
Step1:Judge whether exit has the battery for waiting combo, if not going to Step2, if going to Step4;
Step2:Judge sort in layer whether have unqualified battery in endpoint node, if not going to Step3, if Go to Step5;
Step3:Judge to sort and whether have in endpoint node in layer the non-selected battery of long-time, if do not gone to Step4, if going to Step6;
Step4:Calculated and selected one of battery, algorithm to terminate according to combo optimized mathematical model;
Step5:One of those unqualified battery, algorithm is selected to terminate;
Step6:The non-selected battery of one of long-time, algorithm is selected to terminate.
(3) battery converges:Main control computer control converges the reject gate in layer, and the battery for selecting is slipped to exit, so as to Complete the sorting combo optimization of battery.
Wherein combo optimized mathematical model is described as follows:
i:Battery numbering (from left to right number consecutively) on sorting layer endpoint node, i=1,2 ..., 16;
q:Have been enter into the number of batteries of the wait combo in exit, q=0,1,2,3;
k:Battery performance parameter is numbered, 1 ..., l;
The interval of acceptance of k-th battery parameter is represented, it is interimFor virtual value lower limit,For in virtual value Limit;
vik:K-th parameter value of i-th battery;
K-th parameter value of r-th battery for having waited in exit, r=1 ..., q;
xi:Decision variable, the selected combo of 0 or 1,1 i-th battery of expression;
α:Holdup time penalty coefficient;
ti:Holdup time of i-th battery at sorting layer endpoint node;
The weight coefficient of k-th parameter value
δ:The consistent sex differernce limit value of battery performance;
Wherein, (1) is object function, in minimum group battery weighted average performance difference and more than special time not yet by Select the number of batteries of combo;(2) representing must be with a full Battery pack, and the number of batteries needed for a Battery pack is 4;(3) represent Unqualified battery can not selected combo;(4) average of k-th parameter value with Battery pack is represented;It is flat between (5) one Battery packs Performance difference is no more than its limit value δ.
Above-described embodiment is presently preferred embodiments of the present invention, is not the restriction to technical solution of the present invention, as long as Without the technical scheme that creative work can be realized on the basis of above-described embodiment, it is regarded as falling into patent of the present invention Rights protection scope in.

Claims (3)

1. towards the online dynamic combo optimization system of battery of sorting type streamline, including frame, main control computer, minimum mechanism unit First, minimum mechanism unit two, conveyer belt;
Frame section triangle in obtuse angle, triangular base is fixed in ground, and another two three arm of angle place planes are respectively Upper domatic and Caused by Sloping Surfaces;
The conveyer belt be erected at the frame it is upper domatic on, constitute feeding area;The minimum mechanism unit one, the minimum The connection slideway of mechanism unit two and the minimum mechanism unit of connection two is erected on the Caused by Sloping Surfaces of the frame, constitutes combo Area;
The minimum mechanism unit one is in herringbone, there is an access road and two exit passageways, the both sides of channel interior and The bottom of channel interior is fitted with roller, and in the junction of three passages bifurcated reject gate is provided with, and the bifurcated reject gate is in Sector, circle centre position is provided with bearing, and bearing is located at two exit passageway outer wall cross points, control of the bifurcated reject gate in main control computer The lower left-right rotation of system, the bifurcated reject gate radius is identical with channel width and in arcuation, and the bifurcated reject gate central angle is little In 90 degree;
The minimum mechanism unit two has two entrances passage and one outlet passage, the both sides of channel interior in herringbone And the bottom of channel interior is fitted with roller, it is provided with the junction of three passages and converges reject gate, it is described to converge reject gate In sector, circle centre position is provided with bearing, and bearing is located at two entrances channel outer wall cross point, and the reject gate that converges is in main control computer The lower left-right rotation of control, the reject gate radius that converges is identical with channel width and in arcuation, described to converge reject gate central angle More than 90 degree;
When described two reject gates turn to left side maximum position and the right maximum position, a fan-shaped arcuation radius with connect Access road and connection exit passageway one side it is tangent, rolling is installed on two arcuation radiuses of described two reject gates Son;
Triple channel junction bottom in the minimum mechanism unit one and minimum mechanism unit two is provided with ball;
The connection slideway inside both sides of the connection minimum mechanism unit and interior bottom portion are designed with roller;
The minimum mechanism unit one by connection slideway can multistage-combination constitute the sorting floor in combo area, minimum mechanism's list Unit two by connection slideway can multistage-combination constitute combo area converge floor;The sorting layer and symmetrical, the sorting that converges layer Layer end is connected with the top for converging layer, and sorting floor top is the import of combo area, converges floor end for the outlet of combo area.
2. the online dynamic combo of the battery towards sorting type streamline according to claim 1 optimizes system, and its feature exists In:Comprised the following steps based on the battery combo optimization method of the system:
(1) battery-allocated:Reject gate in main control computer control sorting layer, makes battery be slipped to the minimum sorting of caching number of batteries At layer endpoint node;
(2) battery is selected:A batteries are selected from sorting layer endpoint node, selection operation algorithm is as follows:
Step1:Judge whether exit has the battery for waiting combo, if not going to Step2, if going to Step4;
Step2:Judge sort in layer whether have unqualified battery in endpoint node, if not going to Step3, if going to Step5;
Step3:Judge to sort and whether have in endpoint node in layer the non-selected battery of long-time, if not going to Step4, If going to Step6;
Step4:Combo optimized mathematical model is set up, and is calculated according to combo optimized mathematical model and is selected to sort layer endpoint node In a battery, algorithm terminates;
Step5:A unqualified battery in sorting layer endpoint node, algorithm is selected to terminate;
Step6:The non-selected battery of a long-time in sorting layer endpoint node, algorithm is selected to terminate;
(3) battery converges:Main control computer control converges the reject gate in layer, the battery for selecting is slipped to exit, so as to complete The sorting combo optimization of battery;
Combo optimized mathematical model is as follows described in step (2) Step4:
i:From left to right number consecutively is 1 to battery numbering on sorting layer endpoint node ..., n;
m:Number of batteries needed for one Battery pack, m<n;
q:Have been enter into the number of batteries of the wait combo in exit, q<m;
k:Battery performance parameter is numbered, 1 ..., l;
The interval of acceptance of k-th battery parameter, it is interimFor virtual value lower limit,For the virtual value upper limit;
vik:K-th parameter value of i-th battery;
K-th parameter value of r-th battery for having waited in exit, r=1 ..., q;
xi:Decision variable, the selected combo of 0 or 1,1 i-th battery of expression;
α:Holdup time penalty coefficient;
ti:Holdup time of i-th battery at sorting layer endpoint node;
The weight coefficient of k-th parameter value is
δ:The consistent sex differernce limit value of battery performance;
&Sigma; i = 1 n x i = m - q - - - ( 2 )
V &OverBar; k = &Sigma; i = 1 n x i v i k + &Sigma; r = 1 q v ~ r k m - - - ( 4 )
Wherein, (1) is object function, battery weighted average performance difference and still not selected more than special time in minimum group The number of batteries of combo;(2) representing must be with a full Battery pack, and the number of batteries needed for a Battery pack is m;(3) represent and do not conform to Lattice battery can not selected combo;(4) average of k-th parameter value with Battery pack is represented;Evenness between (5) one Battery packs Can difference no more than its limit value δ.
3. a kind of online dynamic combo of battery towards sorting type streamline according to claim 1 optimizes system, and it is special Levy both sides, internal bottom and the bifurcated reject gate of the inside for being the passage and the connection slideway and converge sorting The roller that two arcuation radiuses of door are provided with can be changed to ball.
CN201510229019.8A 2015-05-07 2015-05-07 Battery online dynamic matching optimization method and system facing to separation-type assembly line Active CN104868184B (en)

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CN108927341A (en) * 2018-08-28 2018-12-04 山东英才学院 Modularization express delivery letter sorting system for electronic commerce
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CN203917194U (en) * 2014-06-13 2014-11-05 中山天贸电池有限公司 A kind of survey short circuit sorting unit of lithium ion cylinder battery
CN204614898U (en) * 2015-05-07 2015-09-02 浙江工商大学 A kind of can the multi-functional full-automatic battery combo system of combination in any

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