CN114700280A - Square battery welding detection method and device - Google Patents
Square battery welding detection method and device Download PDFInfo
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- CN114700280A CN114700280A CN202210627733.2A CN202210627733A CN114700280A CN 114700280 A CN114700280 A CN 114700280A CN 202210627733 A CN202210627733 A CN 202210627733A CN 114700280 A CN114700280 A CN 114700280A
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- 238000003466 welding Methods 0.000 title claims abstract description 95
- 238000001514 detection method Methods 0.000 title claims abstract description 40
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 113
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 113
- 238000004519 manufacturing process Methods 0.000 claims abstract description 29
- 238000004806 packaging method and process Methods 0.000 claims description 53
- 238000004891 communication Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 42
- 230000008569 process Effects 0.000 abstract description 21
- 238000005538 encapsulation Methods 0.000 abstract description 16
- 238000004880 explosion Methods 0.000 abstract description 11
- 230000007246 mechanism Effects 0.000 description 13
- 238000007789 sealing Methods 0.000 description 7
- 238000005259 measurement Methods 0.000 description 6
- 238000003825 pressing Methods 0.000 description 6
- 230000006872 improvement Effects 0.000 description 5
- 230000000007 visual effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000012858 packaging process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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- 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
- B07C5/04—Sorting according to size
- B07C5/10—Sorting according to size measured by light-responsive means
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- 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
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- B07C5/361—Processing or control devices therefor, e.g. escort memory
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/12—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to investigating the properties, e.g. the weldability, of materials
- B23K31/125—Weld quality monitoring
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model provides a square battery welding detection method and device, before the square battery aluminum shell encapsulation process, the difference in height between the shell on at least one side of the square battery aluminum shell encapsulation opening and the top cover and/or the gap width between the shell on at least one side of the square battery aluminum shell encapsulation opening and the top cover are detected, and compared with the preset difference in height data and/or the preset gap width data respectively, samples which are not in the preset difference in height range or the preset gap width data range are rejected. The disclosure also provides a square battery welding detection device for realizing the square battery welding detection method. Through the technical scheme that this disclosure provided, effectively solved the problem of light leak, welding unevenness and welding explosion point in the follow-up welding process, show the precision that has improved square aluminum hull casing and top cap assembly, improved yields and production efficiency, reduced manufacturing cost.
Description
Technical Field
The disclosure relates to the field of power batteries, in particular to a square battery welding detection method and device.
Background
At present, the power battery generally adopts a square hard shell structure, and generally adopts an aluminum shell, the square aluminum shell battery accounts for about 90% of the weight of the power battery, and the aluminum shell of the power battery needs to be welded and packaged to protect an internal electrode structure and prevent electrolyte leakage. At present, the welding and packaging of the aluminum shell of the square battery mainly adopts a laser welding mode, and in the welding and packaging process of the aluminum shell of the square battery, a plurality of factors influencing the welding quality exist, on one hand, the problem of aluminum material is solved, the emissivity of aluminum to laser is very high, and the thermal conductivity of aluminum is high, so that the laser welding is difficult to carry out; on the other hand, the diameter of the optical fiber core is too small, the laser energy is set too high, and the problems of protrusion, air holes, internal bubbles and the like are caused when the aluminum material is welded by laser due to splashing factors such as the cleanliness of a welding port, so that the problems of light leakage, explosion point and the like are caused; on the other hand, the assembly precision of the square battery aluminum shell and the top cover can also cause the problems of light leakage, uneven welding, welding explosion point and the like during the laser welding of aluminum materials, so that the requirement on the assembly precision of the square battery aluminum shell and the top cover in the square battery aluminum shell and top cover welding process is very high.
The traditional method generally adopts a mechanical fixture fixing mode to weld the square battery shell and the top cover, uses an air cylinder and an auxiliary positioning groove thereof to realize clamping and positioning between the square battery shell and the top cover, then uses continuous laser to seal and weld the square aluminum shell top cover, and then detects the welding seam quality after the welding process. The conventional method does not detect the height difference between the prismatic battery case and the top cap or the width of the gap between the prismatic battery case and the top cap before welding, the control of the welding assembly precision of the square battery shell and the top cover is mainly realized by depending on the positioning of a mechanical clamp on the square battery shell and the top cover, but each time of welding, the mechanical clamps are required to be adjusted according to different square battery shells and top covers, and slight difference exists among different mechanical clamps, therefore, the traditional method utilizes a mechanical clamp to clamp and position the square battery shell and the top cover so as to control the height and the gap width of the square battery shell and the top cover, so that deviation is difficult to avoid, in actual production, along with the deformation of product materials in processing, the problems of light leakage, uneven welding and welding explosion point inevitably occur, so that the produced products are scrapped, the yield is low, and the production cost is high.
The improvement of the prior art to the traditional method is mainly the improvement of a mechanical clamp, and a patent application document with publication number CN202317563U discloses a square battery welding clamp which comprises a driving device, a clamping and positioning device, a correcting device and a follow-up device, wherein the clamping and positioning device is connected with the driving device which can drive the clamping and positioning device to rotate, and the clamping and positioning device comprises a positioning groove and a positioning groove
Install the first group cylinder on the constant head tank and constitute, the battery box body is placed to the constant head tank, is equipped with the correcting unit who aligns battery box body and battery lid in the bottom surface of constant head tank, and on correcting unit's the second group cylinder was located to the battery lid, it made the servo-device of welding seam in same position after battery box body and lid cooperation to press from both sides tight positioner one side. This technical scheme accomplishes welding whole square battery case four sides through a clamping, has improved production efficiency and yield to a certain extent.
The patent application document with the publication number of CN214684964U discloses a square battery welding fixture, including square bottom plate, the corner of bottom plate is equipped with L type baffle, the battery is arranged in on the bottom plate and the battery lateral wall contacts with the baffle respectively, be equipped with two sets of spacing subassemblies on the bottom plate, spacing subassembly contacts with the surplus lateral wall of battery respectively, spacing subassembly is including fixing the stationary platen on the bottom plate, set up the movable platen between stationary platen and the battery, still include the guide pillar, the guide pillar passes stationary platen and movable platen, the tip of guide pillar is screwed limit nut, the elastic component is established to the cover on the guide pillar between movable platen and the stationary platen, so that the movable platen compresses tightly the battery. This technical scheme can adjust the tight dynamics of clamp to the battery through the elasticity guide pillar, makes things convenient for getting of battery to put, can save the debugging time of anchor clamps, improves work efficiency.
Above-mentioned prior art scheme only to mechanical fixture's improvement, still can not solve and need adjust mechanical fixture to and the problem of the slight difference of different mechanical fixture, can not effectively solve light leak, welding unevenness and the problem of welding explosion point in the square cell aluminum hull encapsulation welding.
In the prior art, there is a technical scheme for detecting a gap between a battery top cover and a shell after pre-spot welding by adopting a visual detection technology, and a patent document with a publication number of CN215833265U discloses a visual detection device, which comprises a frame, an image acquisition mechanism, an adjusting mechanism and a driving mechanism, wherein the image acquisition mechanism is used for carrying out visual detection on a workpiece; the adjusting mechanism is arranged on the rack and used for adjusting the position of the image acquisition mechanism relative to the workpiece so as to change the visual detection area of the image acquisition mechanism, so that the workpiece can fall into the visual detection area; the driving mechanism is used for clamping the workpiece to move relative to the image acquisition mechanism, so that the image acquisition mechanism can visually detect the workpiece in a moving state, the image acquisition mechanism can be ensured to be in a static state in the process of image acquisition on the workpiece, the shaking of the image acquisition mechanism is avoided, the image acquisition effect of the image acquisition mechanism can be improved, and the accuracy of a workpiece detection result is further improved.
According to the technical scheme, the technical problems of welding light leakage, burning of the battery cell, uneven welding and explosion points cannot be effectively solved, on one hand, the height difference of the square battery shell and the top cover is not detected, and the square battery shell and the top cover are possibly not attached to each other; on the one hand, this technical scheme carries out the detection of gap width after the welding, if the assembly of casing and top cap is bad, the assembly product still can be scrapped, can not effectively improve the yields, reduction in production cost.
In the prior art, a laser range finder is adopted to detect the size of a slit between a shell and a cover plate in a pre-spot welding procedure, the technical scheme includes that the slit size is adjusted in real time, welding is carried out, and a patent document with a publication number of CN211966311U discloses a battery welding device which comprises a clamp assembly and a laser assembly, wherein the clamp assembly comprises a first pressing strip, a second pressing strip and a positioning base plate, the laser assembly comprises a plurality of laser range finders and a laser welder, at least one through hole is formed in the positioning base plate, the hole wall of the through hole comprises a plurality of protruding structures, the first pressing strip and the second pressing strip are used for being abutted to a shell of a battery and extruding the shell to be close to the edge of a cover plate of the battery, so that a slit is formed between the cover plate and the shell, the slit is covered by the protruding structures, the laser range finders are used for detecting the slit which is not covered by the protruding structures, and the laser welder is used for welding the slit which is not covered by the protruding structures. The positioning substrate enables a part of slits between the cover plate and the shell of the battery to be accurately measured by the laser range finder by arranging the through holes in specific shapes, the first pressing strip and the second pressing strip adjust the size of the slits by extruding the shell to meet welding requirements, slit measurement efficiency is improved, and light transmission risks are reduced.
Above-mentioned prior art technical scheme, the gap size detection error of battery case and apron is big, detects the precision and hangs down, can lead to the shell and apron assembly precision still lower, can not effectively improve the yields, can not effectively reduce manufacturing cost. On one hand, the characteristic of the laser range finder is determined, the laser range finder is inaccurate in short-distance detection due to too fast light speed in the detection process, the measurement blind area reaches 1 meter, the measurement precision is +/-10 cm, and the laser range finder is more suitable for long-distance detection; on one hand, the size of each shell and the cover plate is different, so that the size of a gap needs to be adjusted for each assembled product, and the precision error is still large; on the other hand, if the size of the gap between the adjusted shell and the cover plate is still problematic, the subsequent welding procedure is directly carried out, so that the produced product is scrapped; moreover, the height difference of the square battery shell and the top cover is not detected in the technical scheme, so that the technical problems of welding light leakage, burning of the battery core, uneven welding and explosion points cannot be effectively solved in the technical scheme.
In the prior art, a double-distance measurement mode is adopted, the laser displacement sensor is used for respectively detecting the heights of the square battery shell and the top cover, and then the height difference of the square battery shell and the top cover is calculated, so that the yield can be improved to a certain extent. However, based on the laser displacement sensor used in the dual-ranging prior art, the laser triangular reflection principle is adopted, the measurement light spot is a point, that is, a point laser, when the dual-ranging method is adopted, the heights of the square battery shell and the top cover cannot be measured simultaneously, the detection error is large, the width of a gap between the square battery shell and the top cover is not detected, and only one point can be detected each time, the area to be detected for packaging the square battery aluminum shell is large, and the detection efficiency is relatively low.
Therefore, before the welding process of the square battery aluminum shell and the top cover, the height difference and/or the gap width of the square battery shell and the top cover are detected, the square battery shell and the top cover which do not accord with the welding requirement are eliminated, the square battery shell and the top cover which accord with the welding requirement are enabled to enter the welding process, the assembling precision of the square aluminum shell and the top cover can be obviously improved, the yield and the production efficiency are improved, and the production cost is reduced.
Therefore, it is urgently needed to develop a welding detection method for a square battery, so as to further improve the assembly precision of the square aluminum shell and the top cover, improve the yield and the production efficiency, and reduce the production cost.
Disclosure of Invention
The present disclosure provides a method and an apparatus for detecting welding of a square battery, which are used to solve the technical problems of light leakage, uneven welding and welding explosion point in the welding process of the top cover of the aluminum shell of the square battery, improve the assembly precision of the aluminum shell and the top cover of the square battery, improve the yield and the production efficiency, and reduce the production cost.
One of the concepts of the present disclosure is that the present disclosure provides a method for detecting welding of a square battery, the method including:
acquiring height difference data of a shell and a top cover on at least one side of a square battery aluminum shell packaging opening; uploading height difference data of the shell and the top cover on at least one side of the square battery aluminum shell packaging opening to an upper computer system; comparing the height difference data with preset height difference data by using the upper computer system, and finding out a sample with the height difference data not within the preset height difference data range; and rejecting samples of which any side of the square battery aluminum shell packaging opening is not within the preset height difference data range, so that the assembly precision of the square battery aluminum shell and the top cover is improved.
On one hand, the square battery aluminum shell and the top cover are inevitably subjected to surface unevenness at the sealing position due to production reasons, so that the assembly of the shell and the top cover is uneven; on one hand, the surface of the battery core in the square battery aluminum shell, which is close to the sealing position, is inevitably uneven, particularly convex, when the convex position of the battery core props against the top cover, the top cover is possibly higher than the welding position of the shell, and the assembly of the shell and the top cover is uneven; on the other hand, due to the spattering of dust and the like which may exist at the welding port of the case or the top cover, the assembly of the case and the top cover is not smooth, and therefore, it is necessary to detect the height difference of the assembly of the case and the top cover of the aluminum case of the square battery.
Further, one of the ideas of the present disclosure is that the present disclosure provides a method for detecting welding of a square battery, the method including: acquiring the width data of a gap between a shell and a top cover on at least one side of a square battery aluminum shell packaging opening; uploading data of the width of a gap between the shell and the top cover on at least one side of the square battery aluminum shell packaging opening to an upper computer system; comparing the gap width data with preset gap width data by using the upper computer system, and finding out a sample of which the gap width data is not in the range of the preset gap width data; and rejecting samples of which any side of the square battery aluminum shell packaging opening is not in the preset gap width data range.
Specifically, on one hand, the square battery aluminum shell and the top cover have difference in width dimension, which causes the situation that the gap width of the square battery aluminum shell and the top cover is too large during assembly, and the situation that the welding width of the subsequent welding procedure is insufficient due to the large gap width and light leakage occurs; on one hand, due to the size difference between the square battery aluminum shell and the top cover, the width of the top cover exceeds the width of the sealing position of the shell, at least one side of the top cover is overlapped on the sealing position of the shell, and welding unevenness in a subsequent welding process is caused, so that the detection of the width of a gap formed by assembling the square battery aluminum shell and the top cover is also necessary.
Furthermore, one of the concepts of the present disclosure is to provide a method for detecting welding of a square battery, which includes detecting a height difference between a top cover and a casing on at least one side of an aluminum casing sealing opening of the square battery, and detecting a gap width data between the top cover and the casing on at least one side of the aluminum casing sealing opening of the square battery before a square battery aluminum casing sealing process, and rejecting a sample that is not within a preset height difference range or a preset gap width data range.
Specifically, in square battery welding process, the difference in height and the gap width of the at least one side casing of square battery aluminum hull encapsulation mouth and top cap all can exert an influence on square battery welding quality, consequently, before the welding, it is necessary to all detect the difference in height and the gap width of the at least one side casing of square battery aluminum hull encapsulation mouth and top cap, can further improve the assembly precision of square battery aluminum hull casing and top cap to improve yields and production efficiency, reduction in production cost.
Further, one of the concepts of the present disclosure is to provide a square battery welding detection apparatus, which at least includes a line scanning laser sensor and an upper computer system, and implement the method in the above concepts.
Based on the inventive concept, the present disclosure provides a square battery welding detection method, which includes:
acquiring height difference data of a shell and a top cover on at least one side of a square battery aluminum shell packaging opening;
uploading height difference data of the shell and the top cover on at least one side of the square battery aluminum shell packaging opening to an upper computer system;
comparing the height difference data with preset height difference data by using the upper computer system, and finding out a sample with the height difference data not within the preset height difference data range;
and rejecting samples of which any side of the square battery aluminum shell packaging opening is not in the preset height difference data range.
Preferably, the height difference data of the case and the top cover on at least one side of the square battery aluminum case packaging opening is the height difference data of the case and the top cover on four sides of the square battery aluminum case packaging opening.
The present disclosure also provides a method for detecting welding of a square battery, including:
acquiring the width data of a gap between a shell and a top cover on at least one side of a square battery aluminum shell packaging opening;
uploading data of the width of a gap between the shell and the top cover on at least one side of the square battery aluminum shell packaging opening to an upper computer system;
comparing the gap width data with preset gap width data by using the upper computer system to find out a gap
Samples with width data not within the preset gap width data range;
and rejecting samples of which any side of the square battery aluminum shell packaging opening is not within the preset gap width data range.
Preferably, the data of the width of the gap between the case and the top cover on at least one side of the square battery aluminum case packaging opening is the data of the width of the gap between the case and the top cover on four sides of the square battery aluminum case packaging opening.
The present disclosure also provides a method for detecting welding of a square battery, including:
acquiring height difference data of a shell and a top cover on at least one side of a square battery aluminum shell packaging opening;
acquiring the width data of a gap between a shell and a top cover on at least one side of a square battery aluminum shell packaging opening;
uploading the height difference data and/or the gap width data to an upper computer system;
comparing the height difference data with preset height difference data by using the upper computer system to find out the height difference number
According to the samples which are not in the preset height difference data range; comparing the gap width data with preset gap width data by using the upper computer system, and finding out a sample of which the gap width data is not in the range of the preset gap width data;
rejecting samples of which the height difference data of the shell and the top cover on any side of the square battery aluminum shell packaging opening is not in the preset height difference data; or rejecting samples on any side of the square battery aluminum shell packaging opening, which are not in the preset gap width data range.
The height difference data and the gap width data are acquired by a line scanning laser sensor and uploaded to an upper computer system.
The utility model provides a square battery welding detection device, include:
the line scanning laser sensor is used for acquiring height difference data of the shell and the top cover on at least one side of the square battery aluminum shell packaging opening and/or acquiring gap width data between the shell and the top cover on at least one side of the square battery aluminum shell packaging opening, and uploading the height difference data and/or the gap width data to an upper computer system;
and the upper computer system is used for comparing the height difference data uploaded by the line scanning laser sensor with preset height difference data and comparing the gap width data uploaded by the line scanning laser sensor with preset gap width data.
Preferably, the line scanning laser sensor is an analog quantity line scanning laser sensor or a bus communication type line scanning laser sensor.
Preferably, the upper computer system is a programmable logic controller or a manufacturing execution system.
This is disclosed through above-mentioned technical scheme, before square cell aluminum hull encapsulation process, the difference in height of at least one side casing of square cell aluminum hull encapsulation mouth and top cap and/or the gap width between at least one side casing of square cell aluminum hull encapsulation mouth and the top cap detect, respectively with predetermineeing difference in height data and/or predetermineeing gap width data contrast, reject not at predetermineeing the sample of difference in height scope or predetermineeing gap width data within range, effectively solved the light leak in the follow-up welding process, the problem of welding unevenness and welding explosion point, show the precision that has improved square cell aluminum hull casing and top cap assembly, the yields has been improved and production efficiency, manufacturing cost is reduced.
Drawings
The present disclosure will be described in further detail below with reference to the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of illustrating the preferred embodiments and therefore should not be taken as limiting the scope of the present disclosure. Furthermore, unless specifically stated otherwise, the drawings are merely schematic representations based on conceptual representations of elements or structures depicted and may contain exaggerated displays and are not necessarily drawn to scale.
FIG. 1 is a process flow diagram of example 1 of the present disclosure;
FIG. 2 is a flow chart of a method of embodiment 2 of the present disclosure;
FIG. 3 is a flow chart of a method of embodiment 3 of the present disclosure;
fig. 4 is a schematic structural diagram of an apparatus according to embodiment 4 of the present disclosure.
Reference symbol names:
1. a detection component; 2. a mechanical clamp; 3. a line scanning laser sensor.
Detailed Description
The present disclosure is described in detail below with reference to fig. 1 to 4.
In order to make the objects, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the disclosure,
and are not intended to limit the present disclosure.
This openly through above-mentioned technical scheme, solved light leak, welding unevenness and welding explosion point's among the square battery welding process problem, showing the precision that has improved square aluminum hull casing and top cap assembly, improved yields and production efficiency, reduced manufacturing cost.
Example 1
The embodiment 1 of the present disclosure provides a method for detecting welding of a square battery, as shown in fig. 1, including:
step 1: acquiring height difference data of a shell and a top cover on at least one side of a square battery aluminum shell packaging opening;
step 2: uploading height difference data of the shell and the top cover on at least one side of the square battery aluminum shell packaging opening to an upper computer system;
and step 3: comparing the height difference data with preset height difference data by using the upper computer system, and finding out a sample with the height difference data not within the preset height difference data range;
and 4, step 4: and rejecting samples of which any side of the square battery aluminum shell packaging opening is not in the preset height difference data range.
The preset height difference data is a height difference parameter preset according to the process requirement of welding the square battery.
Preferably, the height difference data of the case and the top cover on at least one side of the square battery aluminum case packaging opening is the height difference data of the case and the top cover on four sides of the square battery aluminum case packaging opening.
This embodiment 1 is before square battery welding process, the difference in height data of at least one side casing of square battery aluminum hull encapsulation mouth and top cap detects, the difference in height data that will detect are compared with preset difference in height data, reject the sample that is not in preset difference in height data range, thereby the assembly precision of square battery aluminum hull casing and top cap has been improved, solve the welding unevenness and the technical problem of explosion point in square battery aluminum hull casing and the top cap welding process, the yields and production efficiency have been improved, and the production cost is reduced.
Example 2
The embodiment 2 of the present disclosure provides a method for detecting welding of a square battery, as shown in fig. 2, including:
step 1: acquiring the width data of a gap between a shell and a top cover on at least one side of a square battery aluminum shell packaging opening;
step 2: uploading data of the width of a gap between the shell and the top cover on at least one side of the square battery aluminum shell packaging opening to an upper computer system;
and step 3: comparing the gap width data with preset gap width data by using the upper computer system, and finding out a sample of which the gap width data is not in the range of the preset gap width data;
and 4, step 4: and rejecting samples of which any side of the square battery aluminum shell packaging opening is not within the preset gap width data range.
The preset gap width data is a gap width parameter preset according to the process requirement of welding the square battery.
Preferably, the data of the width of the gap between the case and the top cover on at least one side of the square battery aluminum case packaging opening is the data of the width of the gap between the case and the top cover on four sides of the square battery aluminum case packaging opening.
This embodiment 2 detects the gap width between at least one side casing of square battery aluminum hull encapsulation mouth and the top cap, compares the gap width data that detect with predetermine gap width data, rejects the sample that is not in predetermineeing gap width data range to further improve the assembly precision of square battery aluminum hull casing and top cap, improve yields and production efficiency, reduction in production cost.
Example 3
The embodiment 3 of the present disclosure provides a method for detecting welding of a square battery, as shown in fig. 3, including:
step 1: acquiring height difference data of a shell and a top cover on at least one side of a square battery aluminum shell packaging opening; acquiring the width data of a gap between a shell and a top cover on at least one side of a square battery aluminum shell packaging opening;
step 2: uploading the height difference data and/or the gap width data to an upper computer system;
and step 3: comparing the height difference data with preset height difference data by using the upper computer system, and finding out a sample with the height difference data not within the preset height difference data range; comparing the gap width data with preset gap width data by using the upper computer system, and finding out a sample of which the gap width data is not in the range of the preset gap width data;
and 4, step 4: rejecting samples of which the height difference data of the shell and the top cover on any side of the square battery aluminum shell packaging opening is not in the preset height difference data; or rejecting samples on any side of the square battery aluminum shell packaging opening, which are not in the preset gap width data range.
The height difference data and the gap width data are acquired by a line scanning laser sensor and uploaded to an upper computer system.
This embodiment 3, before square battery aluminum hull encapsulation process, the difference in height of at least one side casing of square battery aluminum hull encapsulation mouth and top cap is detected promptly, detect the gap width between at least one side casing of square battery aluminum hull encapsulation mouth and the top cap again, reject not in predetermineeing the difference in height within range or predetermineeing the sample of gap width data within range, thereby further improve the assembly precision of square battery aluminum hull casing and top cap, improve and detect the precision, improve yields and production efficiency, and reduction in production cost.
Example 4
Based on any one of the square battery aluminum case welding detection methods in embodiments 1 to 3, embodiment 4 of the present disclosure provides a square battery welding detection apparatus, as shown in fig. 4, including:
the device comprises a component 1 to be detected, wherein the component 1 to be detected comprises a mechanical clamp 2, a square battery aluminum shell and a top cover, and the square battery aluminum shell and the top cover are positioned in the mechanical clamp; the mechanical clamp 2 is used for clamping and positioning the square battery aluminum shell and/or the top cover;
the line scanning laser sensor 3 is used for acquiring height difference data of the shell and the top cover on at least one side of the square battery aluminum shell packaging opening and/or acquiring gap width data between the shell and the top cover on at least one side of the square battery aluminum shell packaging opening, and uploading the height difference data and/or the gap width data to an upper computer system;
and the upper computer system is used for comparing the height difference data uploaded by the line scanning laser sensor with preset height difference data and comparing the gap width data uploaded by the line scanning laser sensor with preset gap width data.
Preferably, for the convenience of line scanning laser sensor detection, line scanning laser sensor sets up in the detection area vertically, the detection area is square cell aluminum hull encapsulation mouth casing and top cap place position.
Preferably, the line scanning laser sensor is an analog quantity line scanning laser sensor or a bus communication type line scanning laser sensor.
Preferably, the upper computer system is a programmable logic controller or a manufacturing execution system.
Line scanning laser sensor for two laser displacement sensor that use among the range finding prior art, can carry out the scanning of all points on a line simultaneously and detect, can carry out the scanning of welding mouthful whole face, has high accuracy measurement characteristic, can satisfy the difference in height of square cell aluminum hull encapsulation mouth at least one side casing and top cap and detect when gap width, detection efficiency is high.
The present disclosure has been described in detail above, and the principles and embodiments of the present disclosure have been explained herein using specific examples, which are provided only to assist understanding of the present disclosure and the core concepts. It should be noted that, for those skilled in the art, without departing from the principle of the present disclosure, several improvements and modifications can be made to the present disclosure, and these improvements and modifications also fall into the protection scope of the claims of the present disclosure.
Claims (9)
1. A welding detection method for a square battery is characterized by comprising the following steps:
acquiring height difference data of a shell and a top cover on at least one side of a square battery aluminum shell packaging opening;
uploading height difference data of the shell and the top cover on at least one side of the square battery aluminum shell packaging opening to an upper computer system;
comparing the height difference data with preset height difference data by using the upper computer system, and finding out a sample with the height difference data not within the preset height difference data range;
and rejecting samples of which any side of the square battery aluminum shell packaging opening is not in the preset height difference data range.
2. The prismatic battery weld detection method of claim 1, wherein the prismatic battery aluminum can is packaged
And the height difference data of the shell and the top cover on at least one side of the opening is the height difference data of the shell and the top cover on four sides of the square battery aluminum shell packaging opening.
3. A welding detection method for a square battery is characterized by comprising the following steps:
acquiring the width data of a gap between a shell and a top cover on at least one side of a square battery aluminum shell packaging opening;
uploading data of the width of a gap between the shell and the top cover on at least one side of the square battery aluminum shell packaging opening to an upper computer system;
comparing the gap width data with preset gap width data by using the upper computer system to find out a gap
Samples with width data not within the preset gap width data range;
and rejecting samples of which any side of the square battery aluminum shell packaging opening is not within the preset gap width data range.
4. The welding detection method for the square battery as claimed in claim 3, wherein the data of the width of the gap between the top cover and the case at least one side of the aluminum package opening of the square battery is the data of the width of the gap between the top cover and the case at the four sides of the aluminum package opening of the square battery.
5. A welding detection method for a square battery is characterized by comprising the following steps:
acquiring height difference data of a shell and a top cover on at least one side of a square battery aluminum shell packaging opening;
acquiring the width data of a gap between a shell and a top cover on at least one side of a square battery aluminum shell packaging opening;
uploading the height difference data and/or the gap width data to an upper computer system;
comparing the height difference data with preset height difference data by using the upper computer system to find out the height difference number
According to the samples which are not in the preset height difference data range; comparing the gap width data with preset gap width data by using the upper computer system, and finding out a sample of which the gap width data is not in the range of the preset gap width data;
rejecting samples of which the height difference data of the shell and the top cover on any side of the square battery aluminum shell packaging opening is not within the preset height difference data range; or rejecting samples on any side of the square battery aluminum shell packaging opening, which are not in the preset gap width data range.
6. The prismatic battery welding detection method according to claim 5, wherein the height difference data and the gap width data are acquired by a line scanning laser sensor and uploaded to an upper computer system.
7. The utility model provides a square battery welding detection device which characterized in that includes:
the line scanning laser sensor is used for acquiring height difference data of the shell and the top cover on at least one side of the square battery aluminum shell packaging opening and/or acquiring gap width data between the shell and the top cover on at least one side of the square battery aluminum shell packaging opening, and uploading the height difference data and/or the gap width data to an upper computer system;
and the upper computer system is used for comparing the height difference data uploaded by the line scanning laser sensor with preset height difference data and comparing the gap width data uploaded by the line scanning laser sensor with preset gap width data.
8. The prismatic battery welding detection device of claim 7, wherein the line scanning laser sensor is an analog line scanning laser sensor or a bus communication line scanning laser sensor.
9. The prismatic battery weld detection device of claim 7, wherein the host computer system is a programmable logic controller or a manufacturing execution system.
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Application publication date: 20220705 |