CN103529050B - Power lithium ion battery pole piece defect automatic inspection line and detection method - Google Patents

Power lithium ion battery pole piece defect automatic inspection line and detection method Download PDF

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Publication number
CN103529050B
CN103529050B CN201310483926.6A CN201310483926A CN103529050B CN 103529050 B CN103529050 B CN 103529050B CN 201310483926 A CN201310483926 A CN 201310483926A CN 103529050 B CN103529050 B CN 103529050B
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sucker
pole piece
magazine
double
crossbeam
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CN201310483926.6A
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CN103529050A (en
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韩良
刘永明
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Southeast University
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Southeast University
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Abstract

The invention discloses a kind of power lithium ion battery pole piece defect automatic inspection line and detection method, this automatic inspection line comprises along the feed mechanism of traffic direction layout, vision-based detection mechanism, certified products cutting agency and unacceptable product cutting agency on double-speed chain, and control gear.This detection method comprises material loading step, detecting step, certified products blanking step and unacceptable product blanking step.The present invention has the advantage that detection efficiency is high, use cost is low and target level of product quality is unified.

Description

Power lithium ion battery pole piece defect automatic inspection line and detection method
Technical field
The present invention relates to a kind of automatic checkout equipment and method, be specifically related to a kind of power lithium ion battery pole piece defect automatic inspection line and detection method.
Background technology
Along with the high speed development of human economy, environmental pollution and energy shortage problem are become increasingly conspicuous.Reduce discharging and dual-pressure that petroleum resources are day by day deficient to tackle, development new-energy automobile is all considered as the important channel of development automobile industry and energy-saving and emission-reduction by majority state in the world.Military affairs simultaneously, aviation, medicine and other fields also propose new requirement to high capacity cell.Due to lithium ion battery have specific energy high, there is wider charge power scope, have extended cycle life, multiplying power discharging property is good, do not have memory effect and the plurality of advantages such as pollution-free, current lithium ion battery is in fields such as mobile phone, portable computer, video camera, cameras, almost instead of conventional batteries completely, become the trend of the development of domestic and international electrokinetic cell and application, also impel lithium ion battery to become one of new substitute energy.
The manufacturing process of power lithium-ion battery has been tending towards ripe, and technical process is: batching → coating → drying → roll-in → cut-parts → coating → lamination → battery core encapsulation → oven dry → fluid injection → change into → detect → sorting combo → packaging is dispatched from the factory.According to the principle of work of lithium ion battery, must coat the slurry containing lithium alloy metals oxide and graphite respectively on the surface of matrix and Copper Foil and aluminium foil, form pole piece, this step is called coating.Be coated with the important procedure produced as lithium ion battery, performance for battery has very large impact, and the general technology flow process of pole coating is as follows: unreel → contact pin → pulling-on piece → tension force control → automatic deviation correction → coating → drying → automatic deviation correction → tension force control → automatic deviation correction → rolling.Wherein in coating process, any one link all likely causes pole piece to produce defect, can produce a lot of defect, as cut, fold etc., this will have a strong impact on the performance and used life of battery, it is necessary to detect accurately pole piece, to improve quality and the consistance of battery.And for the defects detection of pole piece, most domestic manufacturer all uses traditional manual detection, its detection efficiency is low, and often by the impact of subjective factor, full-automatic detection production line and Machine Vision Detection will replace the main development direction that manual detection becomes later.
The section of lithium battery pole slice is molded on respective independently equipment and completes, and the pole piece number of every platform equipment cross cutting is 1, beat about 2 slices/second.Day 21 hours working times, day productive capacity be each 400,000 of positive/negative plate, add up to 800,000.Per diem 21 hours working times calculated, the detection that must complete positive plate or each 6 of negative plate per second.The product qualified rate of current pole piece is 95%.
The detection mode of current employing is the mode of total man's work visual inspection.Positive plate group personnel depaly is 6 people/class, 2 classes/day, cost of labor about 4000 yuan/people.Complete current production capacity, annual total cost of labor about 4000 × 6 × 2 × 12=576000 unit dropped into, the cost of labor that positive and negative plate combination meter drops into is 1152000 yuan.And the standard fluctuation of artificial visually examine is comparatively large, there is certain uncertainty in quality control, in order to ensure that the quality level of product also needs the finished product after to visual inspection to do pick test sometimes, can increase again the cost of detection further.
Summary of the invention
Goal of the invention: to fluctuate large deficiency to overcome the high and standard of the cost that exists in prior art Manual Visual Inspection, the invention provides a kind of power lithium ion battery pole piece defect automatic inspection line and detection method.
Technical scheme: for solving the problems of the technologies described above, power lithium ion battery pole piece defect automatic inspection line provided by the invention, comprises double-speed chain, double-speed chain is placed with working plate, working plate has the pole piece storage tank arranged along double-speed chain center line, along the operation of working plate to being furnished with:
Feed mechanism, comprise first crossbeam, the first sucker, the first elevating mechanism, the first translation mechanism and raw material magazine, described first crossbeam is installed on above double-speed chain, described first sucker be installed on first crossbeam two ends and towards double-speed chain, described raw material magazine is installed on the both sides of double-speed chain, and both sides raw material magazine is equal with the length of described first crossbeam with the distance of described center line; Described first sucker is connected with the elevating mechanism of vertical movement, and described first crossbeam is connected with the first translation mechanism; When working plate rests in feed mechanism, described raw material magazine, the first sucker and pole piece storage tank are on same straight line;
Vision-based detection mechanism, comprises industrial camera and annular light source, and described annular light source is positioned at above double-speed chain, and described industrial camera is positioned at the top at annular light source center;
Certified products cutting agency, comprise second cross beam, the second sucker, the second elevating mechanism, the second translation mechanism and certified products magazine, described second cross beam is installed on above double-speed chain, described second sucker be installed on second cross beam two ends and towards double-speed chain, described certified products magazine is installed on the both sides of double-speed chain, and both sides certified products magazine is equal with the length of described second cross beam with the distance of described center line; Described second sucker is connected with the second elevating mechanism of vertical movement, and described second cross beam is connected with the second translation mechanism along the movement of second cross beam length direction; When working plate rests in certified products cutting agency, described certified products magazine, the second sucker and pole piece storage tank are on same straight line;
Unacceptable product cutting agency, comprise the 3rd crossbeam, the 3rd sucker, the 3rd elevating mechanism, the 3rd translation mechanism and unacceptable product magazine, described 3rd crossbeam is installed on above double-speed chain, described 3rd sucker be installed on the 3rd crossbeam two ends and towards double-speed chain, described unacceptable product magazine is installed on the both sides of double-speed chain, and both sides unacceptable product magazine is equal with the length of described 3rd crossbeam with the distance of described center line; Described 3rd sucker is connected with the 3rd elevating mechanism of vertical movement, and described 3rd crossbeam is connected with the 3rd translation mechanism along the 3rd crossbeam length direction movement; When working plate rests in unacceptable product cutting agency, described unacceptable product magazine, the 3rd sucker and pole piece storage tank are on same straight line.
As preferably, in order to improve the efficiency of detection, once complete detection and the loading and unloading of more multi-pole-piece, described working plate is disposed with four pole piece storage tanks along described center line, and described raw material magazine, certified products magazine, unacceptable product magazine are four couple corresponding with described pole piece storage tank with the first sucker, the second sucker, the 3rd sucker.。
As preferably, in order to simplify structure and the control of elevating mechanism, the discharging opening of described pole piece storage tank and described raw material magazine, certified products magazine and unacceptable product magazine is in the same plane, described first elevating mechanism is integrally installed on first crossbeam, described second elevating mechanism is integrally installed on second cross beam, and described 3rd elevating mechanism is integrally installed on the 3rd crossbeam.In order to adapt to the height error of different magazine and working plate, elevating mechanism also can independently be installed between each sucker and crossbeam.
Above-mentioned feed mechanism, certified products cutting agency and unacceptable product cutting agency are all connected to control gear, and control gear receives the signal of vision-based detection mechanism, and controls the force of suction cup of feed mechanism, certified products cutting agency and unacceptable product cutting agency.
As preferably, in order to recycle working plate, the two ends of described double-speed chain are provided with working plate lifting table, the lower floor of described double-speed chain have dock with described lifting table return printed line.
The present invention proposes the detection method of above-mentioned power lithium ion battery pole piece defect automatic inspection line simultaneously, comprises carrying out with double-speed chain transmission direction:
1) material loading step, working plate rests in feed mechanism, first sucker of first crossbeam side to move to above the raw material magazine of double-speed chain side and the pole piece drawn in raw material magazine, when first crossbeam integral translation makes this first sucker arrive above working plate, first sucker of first crossbeam opposite side just arrives above double-speed chain opposite side raw material magazine, placement and the absorption of pole piece is carried out respectively after both sides first sucker declines simultaneously, the working plate being placed pole piece enters detecting step along double-speed chain, when next working plate enters in feed mechanism, the pole piece be adsorbed on the first sucker of side is also put into working plate by first crossbeam translation, the pole piece in magazine drawn by first sucker of opposite side simultaneously,
2) detecting step, working plate from process below the annular light source and industrial camera of vision-based detection mechanism, industrial camera by the image transmitting of working plate superior pole piece to control gear;
3) certified products blanking step, working plate through detecting step rests in certified products cutting agency, second sucker of second cross beam side moves to above working plate, control center is according to step 2) whether the judgement of image control the applying of force of suction cup, unacceptable product blanking step is entered along double-speed chain by the working plate after drawing certified products pole piece, when next working plate enters in certified products cutting agency, second cross beam translation makes the second sucker of side arrive above certified products magazine, second sucker of opposite side just arrives the top of next working plate, certified products magazine is put into by drawing qualified pole piece respectively after second sucker of both sides declines simultaneously, selectivity draws the qualified pole piece on working plate,
4) unacceptable product blanking step, working plate through certified products blanking step rests in unacceptable product cutting agency, 3rd sucker of the 3rd crossbeam side moves to above working plate, control center is according to step 2) whether the judgement of image control the applying of force of suction cup, sent along double-speed chain by the working plate after drawing unacceptable product pole piece, when next working plate enters in unacceptable product cutting agency, 3rd cross beam translation makes the 3rd sucker of side arrive above unacceptable product magazine, 3rd sucker of opposite side just arrives the top of next working plate, unacceptable product magazine is put into by drawing defective pole piece respectively after 3rd sucker of both sides declines simultaneously, selectivity draws the defective pole piece on working plate.
Beneficial effect: the present invention uses machine vision technique to replace manual detection, utilizes double-speed chain as assembly line conveying device, has following advantage:
1. detection efficiency is high.Automatic production line of the present invention uses machine vision technique to replace manual detection, and utilize double-speed chain as the visual inspection work of alternative six checkers of assembly line conveying device, efficiency improves greatly.And adopt double-speed chain to achieve the combination adopting static loading and unloading and detection of dynamic in conjunction with working plate, can be so just static when ensureing that pole piece is put into the transmission magazine on production line or takes off from transmission magazine, and this can not affect the detection of dynamic of pole piece, and working plate avoids the damage to pole piece in transport process;
2. the execution efficiency of loading and unloading is high, handling equipment adopts the arrangement arranging sucker and double-speed chain both sides magazine at crossbeam two ends, after a crossbeam translation, both sides sucker carries out absorption and the placement of pole piece separately, shortens the mechanism operation time in each beat, simplifies location and controls;
3. reduce costs.Production line projected cost of the present invention is that 200,000,3 production lines amount to 600,000; Every bar production line 1 operative, the cost of labor of 3 production lines is 28.8 ten thousand yuan/year altogether; The annual upkeep cost of every bar production line is 100,000 yuan, and 3 production lines amount to 300,000; Above-mentioned production line cost, labour cost and maintenance cost add up to 113.8 ten thousand yuan, compare existing Manual Visual Inspection mode and can save 16.4 ten thousand yuan;
4. the realization that target level of product quality is unified.The present invention's whole process adopts the Photoelectric Detection mode of robotization, and under avoiding traditional mode of production mode, the phenomenon that the product standard that Manual Visual Inspection brings differs, achieves the quality requirements of product with standard.
Accompanying drawing explanation
Fig. 1 is the integrated model schematic diagram of the power lithium ion battery pole piece defect automatic inspection line of embodiments of the invention;
Fig. 2 is the structural representation of feed mechanism in Fig. 1;
Fig. 3 is the vertical view of Fig. 2.
Embodiment
Embodiment: as shown in Figure 1, the present embodiment power lithium ion battery pole piece defect automatic inspection line comprise double-speed chain 1 is arranged along the traffic direction of working plate 1-1 feed mechanism 2, vision-based detection mechanism, certified products cutting agency 5, unacceptable product cutting agency 6, and control gear.
For feed mechanism, certified products cutting agency and unacceptable product cutting agency, owing to having identical structure, crossbeam is referred to as below to below first crossbeam wherein, second cross beam, the 3rd crossbeam, first elevating mechanism, the second elevating mechanism, the 3rd elevating mechanism are referred to as elevating mechanism, be referred to as translation mechanism below first translation mechanism, the second translation mechanism, the 3rd translation mechanism, raw material magazine wherein, certified products magazine, unacceptable product magazine are referred to as magazine.
Wherein vision-based detection mechanism comprises the annular light source 4 be positioned at above double-speed chain 1, and is positioned at the industrial camera 3 of annular light source 4 overcentre; , the wherein diameter 180mm of annular light source 4, angle is 60 °, and it is higher with the picture quality making industrial camera 3 and obtain to carry out low range blanking.Because pole piece defect kind is various, while guaranteed efficiency, also will improve Detection job, industrial camera 3 detects at twice to each pole piece, namely each pole piece is split into two halves each bat one two field picture.
Double-speed chain 1 is placed with working plate 1-1, on working plate, 1-1 has the pole piece storage tank 1-2 arranged along double-speed chain center line, the two ends of double-speed chain are separately installed with working plate lifting table 1-3 and 1-4, lifting table 1-3 and 1-4 is by the screw lifting device of driven by motor, is docked by the conveyer line on double-speed chain 1 upper strata with the printed line that returns of lower floor.
As shown in Figures 2 and 3, feed mechanism comprises crossbeam 21, sucker 22, elevating mechanism 23, translation mechanism (not shown) and magazine 24, crossbeam 21 to be installed on above double-speed chain and orthogonal with its center line, sucker 22 be installed on crossbeam 21 two ends and towards double-speed chain, magazine 24 is installed on the both sides of double-speed chain, and magazine 24 and the distance of double-speed chain center line of both sides equal the length of crossbeam.
Crossbeam 21 is connected with translation mechanism, make sucker 22 can between pole piece storage tank 1-2 and 24 of magazine translation material.In order to adapt to the height error of different magazine 24 and working plate 1-1, elevating mechanism 23 is installed between each sucker 22 and crossbeam 21 independently.Certainly in order to simplify structure and the control of elevating mechanism, also can be installed on same plane by the discharging opening of 24 of pole piece storage tank 1-2 and magazine, elevating mechanism 23 just can be installed on crossbeam 21 integratedly.
When working plate 1-1 rests in feed mechanism, magazine 24, sucker 22 are on same straight line with pole piece storage tank 1-2.On working plate 1-1, centrally line is disposed with four pole piece storage tank 1-2, and magazine 24 and sucker 22 are four couples corresponding with pole piece storage tank 1-2.
Because charging and discharging mechanism is all carry out putting into and the action of taking off pole piece between working plate and magazine two positions, so physical construction is identical, the process of elevating mechanism cylinder and backhaul two actions complete the action of twice material loading or blanking.In order to reduce equipment cost, the control section of simplified apparatus, is divided into two stations cutting agency, and a station takes out defective pole piece, and another station takes out qualified pole piece.
In order to simplify structure and the control of elevating mechanism, the discharging opening of pole piece storage tank and magazine is in the same plane, and elevating mechanism is integrally installed on crossbeam.In order to adapt to the height error of different magazine and working plate, elevating mechanism also can independently be installed between each sucker and crossbeam.
During use, above-mentioned power lithium ion battery pole piece defect automatic inspection line detects according to following steps:
1) material loading step, working plate rests in feed mechanism, the sucker of crossbeam side to move to above the magazine of double-speed chain side and the pole piece drawn in magazine, when this sucker moves to above working plate, the sucker of crossbeam opposite side just arrives above double-speed chain opposite side magazine, placement and the absorption of pole piece is carried out respectively after both sides sucker declines simultaneously, the working plate being placed pole piece enters detecting step along double-speed chain, when next working plate enters in feed mechanism, pole piece on the sucker of side is also put into working plate by cross beam translation, the pole piece in magazine drawn by opposite side sucker simultaneously,
2) detecting step, working plate from process below the annular light source and industrial camera of vision-based detection mechanism, industrial camera by the image transmitting of working plate superior pole piece to control gear;
3) certified products blanking step, working plate through detecting step rests in certified products cutting agency, when the sucker of crossbeam side moves to above working plate, control center is according to step 2) whether the judgement of image control the applying of force of suction cup, the working plate being drawn pole piece by selectivity enters unacceptable product blanking step along double-speed chain, when next working plate enters in certified products cutting agency, this sucker moves to above magazine, the sucker of opposite side just arrives the top of next working plate, the selectivity of the placement and certified products of having drawn pole piece after both sides sucker declines simultaneously is respectively drawn,
4) unacceptable product blanking step, working plate through certified products blanking step rests in unacceptable product cutting agency, when the sucker of crossbeam side moves to above working plate, control center is according to step 2) whether the judgement of image control the applying of force of suction cup, the working plate being drawn pole piece by selectivity exports along double-speed chain, when next working plate enters in unacceptable product cutting agency, this sucker moves to above magazine, the sucker of opposite side just arrives the top of next working plate, the selectivity of the placement and unacceptable product of having drawn pole piece after both sides sucker declines simultaneously is respectively drawn.
With above-mentioned according to desirable embodiment of the present invention for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this invention technological thought, can carry out various change and amendment completely.The technical scope of this invention is not limited to the content on instructions, must determine its technical scope according to right.

Claims (5)

1. a power lithium ion battery pole piece defect automatic inspection line, comprise double-speed chain, described double-speed chain being placed with working plate, described working plate having the pole piece storage tank arranged along double-speed chain center line, it is characterized in that operation along described working plate is to being furnished with:
Feed mechanism, comprise first crossbeam, the first sucker, the first elevating mechanism, the first translation mechanism and raw material magazine, described first crossbeam is installed on above double-speed chain, described first sucker be installed on first crossbeam two ends and towards double-speed chain, described raw material magazine is installed on the both sides of double-speed chain, and both sides raw material magazine is equal with the length of described first crossbeam with the distance of described center line; Described first sucker is connected with the elevating mechanism of vertical movement, and described first crossbeam is connected with the first translation mechanism; When working plate rests in feed mechanism, described raw material magazine, the first sucker and pole piece storage tank are on same straight line;
Vision-based detection mechanism, comprises industrial camera and annular light source, and described annular light source is positioned at above double-speed chain, and described industrial camera is positioned at the top at annular light source center;
Certified products cutting agency, comprise second cross beam, the second sucker, the second elevating mechanism, the second translation mechanism and certified products magazine, described second cross beam is installed on above double-speed chain, described second sucker be installed on second cross beam two ends and towards double-speed chain, described certified products magazine is installed on the both sides of double-speed chain, and both sides certified products magazine is equal with the length of described second cross beam with the distance of described center line; Described second sucker is connected with the second elevating mechanism of vertical movement, and described second cross beam is connected with the second translation mechanism along the movement of second cross beam length direction; When working plate rests in certified products cutting agency, described certified products magazine, the second sucker and pole piece storage tank are on same straight line;
Unacceptable product cutting agency, comprise the 3rd crossbeam, the 3rd sucker, the 3rd elevating mechanism, the 3rd translation mechanism and unacceptable product magazine, described 3rd crossbeam is installed on above double-speed chain, described 3rd sucker be installed on the 3rd crossbeam two ends and towards double-speed chain, described unacceptable product magazine is installed on the both sides of double-speed chain, and both sides unacceptable product magazine is equal with the length of described 3rd crossbeam with the distance of described center line; Described 3rd sucker is connected with the 3rd elevating mechanism of vertical movement, and described 3rd crossbeam is connected with the 3rd translation mechanism along the 3rd crossbeam length direction movement; When working plate rests in unacceptable product cutting agency, described unacceptable product magazine, the 3rd sucker and pole piece storage tank are on same straight line.
2. power lithium ion battery pole piece defect automatic inspection line according to claim 1, it is characterized in that: described working plate is disposed with four pole piece storage tanks along described center line, described raw material magazine, certified products magazine, unacceptable product magazine are four couple corresponding with described pole piece storage tank with the first sucker, the second sucker, the 3rd sucker.
3. power lithium ion battery pole piece defect automatic inspection line according to claim 1, it is characterized in that: the discharging opening of described pole piece storage tank and described raw material magazine, certified products magazine and unacceptable product magazine is in the same plane, described first elevating mechanism is integrally installed on first crossbeam, described second elevating mechanism is integrally installed on second cross beam, and described 3rd elevating mechanism is integrally installed on the 3rd crossbeam.
4. power lithium ion battery pole piece defect automatic inspection line according to claim 1, it is characterized in that: also comprise control gear, for receiving the signal of vision-based detection mechanism and controlling described feed mechanism, certified products cutting agency and unacceptable product cutting agency.
5. power lithium ion battery pole piece defect automatic inspection line according to claim 1, is characterized in that: the two ends of described double-speed chain are provided with working plate lifting table, the lower floor of described double-speed chain have dock with described lifting table return printed line.
CN201310483926.6A 2013-10-16 2013-10-16 Power lithium ion battery pole piece defect automatic inspection line and detection method Expired - Fee Related CN103529050B (en)

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CN109975628B (en) * 2017-12-28 2021-10-15 国网山东省电力公司电力科学研究院 Automatic matching power distribution automatic terminal continuous detection platform and method
CN110824371A (en) * 2019-11-08 2020-02-21 广东利元亨智能装备股份有限公司 Battery detection method and device, electronic equipment and readable storage medium

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