CN116519063B - Detection device and detection method applied to cylindrical battery - Google Patents
Detection device and detection method applied to cylindrical battery Download PDFInfo
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- CN116519063B CN116519063B CN202310797249.9A CN202310797249A CN116519063B CN 116519063 B CN116519063 B CN 116519063B CN 202310797249 A CN202310797249 A CN 202310797249A CN 116519063 B CN116519063 B CN 116519063B
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- 238000001514 detection method Methods 0.000 title claims abstract description 142
- 230000007246 mechanism Effects 0.000 claims abstract description 178
- 238000012360 testing method Methods 0.000 claims abstract description 67
- 238000000034 method Methods 0.000 claims abstract description 23
- 230000008569 process Effects 0.000 claims abstract description 18
- 239000000428 dust Substances 0.000 claims description 58
- 230000002950 deficient Effects 0.000 claims description 50
- 238000007689 inspection Methods 0.000 claims description 44
- 230000007547 defect Effects 0.000 claims description 20
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- 230000005540 biological transmission Effects 0.000 claims description 10
- 230000000007 visual effect Effects 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 3
- 238000012546 transfer Methods 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000012545 processing Methods 0.000 abstract description 7
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 2
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- 229910001415 sodium ion Inorganic materials 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
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- 229910052739 hydrogen Inorganic materials 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
- G01D11/30—Supports specially adapted for an instrument; Supports specially adapted for a set of instruments
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention relates to the technical field of energy storage device processing, in particular to a detection device and a detection method applied to a cylindrical battery. The pressure-resistant testing mechanism comprises a pressure-resistant supporting frame, a pressure-resistant lifting frame movably connected with the pressure-resistant supporting frame, a measuring head movably connected to the pressure-resistant lifting frame, a first lifting driving assembly arranged on the pressure-resistant supporting frame and used for driving the pressure-resistant lifting frame to move, and a spring arranged between the measuring head and the pressure-resistant supporting frame. The whole detection process of the invention has strong continuity, does not need to transfer the battery frequently, saves a great amount of time, improves the operation efficiency and reduces the production cost.
Description
Technical Field
The invention relates to the technical field of energy storage device processing, in particular to a detection device and a detection method applied to a cylindrical battery.
Background
A Battery (Battery) is an energy storage device capable of storing electric energy, and generally refers to a device capable of converting chemical energy into electric energy by a partial space of a cup, a tank, or other container or a composite container containing an electrolyte solution and a metal electrode to generate electric current, and has a positive electrode and a negative electrode. Common energy storage batteries include lithium ion batteries, sodium ion batteries, lead acid batteries, nickel hydrogen batteries, super capacitors, and the like. In the production and processing processes of products such as lithium ion batteries and sodium ion batteries, a metal shell for placing the battery core is required to be processed, and for cylindrical batteries, a groove is required to be processed at a position, close to the end, of the periphery of the cylindrical battery, so that a flange is inwards formed by the metal shell, and the limit of the inner battery core part is facilitated. In the production and processing process of the cylindrical battery, detection of a plurality of items is required, such as appearance detection, detection of whether the battery core is in place after being put into the shell, voltage withstanding test and the like, in the current production and processing, different detection items are generally carried out separately, products to be detected are required to be collected when one item is detected, the products are transferred to corresponding working stations, detection is carried out by using corresponding instruments, the products are collected after the detection is finished, and the products are transferred to other working stations to carry out operations of other items. Because of the large number of detection items, a large amount of transit time is consumed, and the continuity and the efficiency of the processing process are poor. At present, the detection is generally operated manually, the product is required to be placed on a detection instrument by relying on manual work, the detection is carried out by operating the instrument, the product is taken away after the detection is finished, the operation efficiency is further reduced, and the possibility of detection errors is increased due to long-time manual operation. Although an apparatus capable of performing automatic detection to a certain extent, such as an automatic detection apparatus for detecting defects of a cylindrical battery case disclosed in publication No. CN110813772a, is only capable of performing appearance detection, if other projects are performed, frequent transfer is still required, and the battery is possibly damaged in the process of frequent transfer, so that the conventional manner cannot meet the requirement of automatic processing.
Disclosure of Invention
In order to solve the problems, the invention provides a detection device applied to a cylindrical battery, which can continuously perform appearance inspection, cell height detection and withstand voltage test on the battery at one time without repeatedly collecting and transferring products, and a detection method using the detection device.
The invention is realized by the following scheme:
a detection device for a cylindrical battery, comprising:
the shell checking mechanism is used for detecting the shell of the cylindrical battery;
the battery cell height detection mechanism is used for detecting the installation height of the battery cell;
the withstand voltage test mechanism is used for performing withstand voltage test on the battery;
the battery positioning mechanism is used for positioning the battery;
the shell checking mechanism, the battery cell height detecting mechanism and the withstand voltage testing mechanism are sequentially arranged;
the pressure-resistant testing mechanism comprises a pressure-resistant supporting frame, a pressure-resistant lifting frame movably connected with the pressure-resistant supporting frame, a measuring head movably connected to the pressure-resistant lifting frame, a first lifting driving assembly arranged on the pressure-resistant supporting frame and used for driving the pressure-resistant lifting frame to move, and a spring arranged between the measuring head and the pressure-resistant supporting frame. The first lifting driving component can drive the pressure-resistant lifting frame to move downwards, so that the measuring head is in contact with the electric core of the battery. The withstand voltage lifting frame can be provided with a plurality of withstand voltage tests of a plurality of batteries simultaneously. The spring can play a buffering role when the measuring head is contacted with the battery cell, so that the damage of the measuring head to the battery cell is avoided.
Further, the detection device applied to the cylindrical battery further comprises a battery conveying line for conveying the cylindrical battery among the shell inspection mechanism, the battery cell height detection mechanism and the voltage withstanding test mechanism, wherein the battery conveying line comprises a supporting component, a conveying belt arranged on the supporting component, a plurality of conveying jigs uniformly arranged on the conveying belt and a driving component for driving the conveying belt wheel component, and the driving component is in transmission connection with the conveying belt through a transmission belt. The driving assembly can drive the conveying belt to carry out stepping conveying, and the conveying belt stops when the battery reaches the corresponding mechanism. The battery is correspondingly tested by a shell inspection mechanism, a battery cell height detection mechanism and a voltage withstand test mechanism in sequence under the transmission of a battery transmission line.
Further, the housing inspection mechanism comprises an inspection support frame, at least one visual sensor arranged on the inspection support frame, and an illumination source arranged on the inspection support frame. The visual sensor can be connected with a central control system which is additionally arranged, after the visual sensor acquires the battery shell image, the image is transmitted to the central control system, and the central control system compares the acquired image with the standard product image to judge whether the battery shell accords with the design standard.
Further, the detection device applied to the cylindrical battery further comprises a battery feeding mechanism used for transferring the cylindrical battery to a battery conveying line, the battery feeding mechanism comprises a feeding support frame, a feeding lifting frame movably connected with the feeding support frame, a feeding movable frame movably connected with the feeding lifting frame, at least one carrying assembly used for carrying the battery is arranged on the feeding movable frame, a feeding driving arm is rotatably connected to the feeding support frame, and one end of the feeding driving arm is connected with the feeding movable frame. The feeding lifting frame can move along the vertical direction, the feeding moving frame can move along the horizontal direction, and the feeding driving arm is connected with the feeding moving frame to form a structure similar to a rocker sliding block, so that when the driving arm rotates, the feeding moving frame is pushed to realize the movement in the horizontal direction and the vertical direction, and further realize the actions of grabbing a battery from a position, moving to the position above a battery conveying line and putting down the battery.
Further, the handling assembly comprises a clamping jaw cylinder connected with the feeding moving frame, a clamping piece is arranged at the output end of the clamping jaw cylinder, and the clamping piece is provided with an inner concave part matched with the battery shell. The clamping jaw cylinder can drive the two clamping pieces to clamp the battery from the upper end of the battery, so that the battery can be carried. The handling assembly may be provided in plurality so as to enable simultaneous handling of a plurality of batteries at a time.
Further, the detection device applied to the cylindrical battery further comprises a dust removing mechanism arranged between the battery feeding mechanism and the shell checking mechanism, the dust removing mechanism comprises a dust removing support frame, the dust removing support frame is movably connected with a dust removing seat arranged on one side of the dust removing support frame, facing the battery conveying line, and a plurality of dust removing pieces are arranged on the dust removing seat. The dust removing piece can be sleeved at the upper end of the battery, and negative pressure is utilized to suck away dust on the battery, so that the subsequent detection is prevented from being influenced by the dust.
Further, the battery cell height detection mechanism comprises a detection support frame, a detection lifting frame movably connected with the detection support frame, a second lifting driving assembly arranged on the detection support frame and used for driving the detection lifting frame to move, and a contact head arranged on the detection lifting frame, wherein the contact head is movably connected with the detection lifting frame, the upper end of the contact head penetrates through the detection lifting frame, the upper end of the contact head is connected with a measuring piece, and the detection lifting frame is provided with a distance sensor corresponding to the measuring piece; a spring is connected between the contact head and the detection lifting frame; the battery positioning mechanism is arranged on the battery conveying line. The spring can play a buffering role, and the damage of the measuring piece to the battery cell is avoided. In addition, a plurality of contact heads can be arranged, and the test of a plurality of batteries can be simultaneously carried out.
Further, the first lifting driving assembly and the second lifting driving assembly comprise lifting seats, buffer components are arranged on the lifting seats, the buffer components of the first lifting driving assembly are connected with the pressure-resistant lifting frame, and the buffer components of the second lifting driving assembly are connected with the detection lifting frame. The buffer part can play a role in buffering when the pressure-resistant lifting frame or the detection lifting frame moves downwards, so that the damage to the battery caused by the corresponding part is avoided.
The invention also provides a detection method of the cylindrical battery, which is applied to the detection device of the cylindrical battery and comprises the following steps: transferring a cylindrical battery to be detected onto a battery conveying line, covering the upper end of the battery by a dust removing mechanism to remove dust from the cylindrical battery, checking one end of the cylindrical battery with a rolling groove by a shell checking mechanism, detecting the height of a battery cell of the cylindrical battery by a cell height detecting mechanism, and performing a voltage withstanding test on the battery cell by a voltage withstanding testing mechanism; in the process of conveying the cylindrical batteries, the conveying line needs to be suspended when the batteries to be detected reach a testing station; the shell inspection mechanism, the battery cell height detection mechanism and the voltage withstand test mechanism are all connected with a central control system, the detection result is uploaded to the central control system, the central control system stores the detection result, defective products are marked, and defective information is recorded. The dust removal, appearance inspection, battery cell height detection and voltage withstand test of the battery can be continuously carried out without frequent transfer.
Further, the method comprises the following steps:
step one, providing a cylindrical battery to be detected, wherein a battery feeding mechanism transfers the battery to a battery conveying line, and the provision of the cylindrical battery can be realized through a feeding line which is additionally arranged;
step two, the battery conveying line stops after conveying the battery to the corresponding position of the dust removing mechanism, the dust removing head moves downwards, dust at the upper end of the cylindrical battery is sucked away, and after the dust is removed, the influence of the dust on the subsequent detection process can be avoided;
thirdly, the battery is conveyed to a shell inspection mechanism by a battery conveying line and then stopped, a visual sensor of the shell inspection mechanism acquires images of the cylindrical battery, the images are compared with standard product images, if defective products are detected, marking is carried out, and the standard product images can be stored in a central control system in advance;
step four, the battery is conveyed to a battery cell height detection mechanism by a battery conveying line and then stopped, the battery is positioned by a battery positioning mechanism corresponding to the battery cell height detection mechanism, a contact head of the battery cell height detection mechanism moves downwards to contact with the battery cell, the height of the battery cell is detected, detected data is uploaded to a central control system, and if defective products are detected, marking is carried out;
step five, the battery conveying line stops after conveying the battery to the voltage withstand test mechanism, a measuring head of the voltage withstand test mechanism moves downwards to contact with the battery core, voltage withstand test is carried out on the battery core, detected data are uploaded to the central control system, and if defective products are detected, marking is carried out;
step six, the battery conveying line conveys the tested cylindrical batteries, screens out marked defective products, and screens out the compared defective products can be realized through a defective product blanking mechanism which is additionally arranged;
step seven, collecting the screened defective products, checking the defective products, analyzing the defective reasons and improving the defective products, if the defect of the defective products can be overcome after improvement, the scrapping amount can be reduced, and the production cost is saved;
in the third, fourth and fifth steps, the detection result of the battery is uploaded to a central control system, the central control system stores the detection result, marks defective products and records defective information, and the central control system can be connected with a user terminal so as to conveniently retrieve product information for tracing;
in the fifth step, the sampling rate of the withstand voltage test is 30 ms-500 ms/time, the voltage is 1500V, and the resistance is 200mΩ.
Further, in the third step, a visual sensor of the shell inspection mechanism acquires a plurality of images of the cylindrical battery, fuses the images to obtain a fused image, compares the fused image with a standard product image, and judges whether a rolling groove of the cylindrical battery has a defect or not; the acquiring of the plurality of images of the cylindrical battery means: multiple images with different illumination intensities or multiple images with different exposure degrees or multiple images with different angles or multiple images with different illumination angles are acquired. Different defects behave differently under different conditions, and a plurality of images are acquired, so that the accuracy of the defects of the battery case can be checked.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the shell inspection mechanism, the battery cell height detection mechanism, the voltage withstand test mechanism and the battery positioning mechanism are arranged, under the cooperation of the battery feeding mechanism and the battery conveying mechanism, the battery stops to detect corresponding items when being conveyed to the corresponding position of each mechanism, the whole detection process is strong in continuity, the battery is not required to be transferred frequently, a large amount of time is saved, the operation efficiency is improved, and the production cost is reduced.
2. The invention realizes automation from battery charging to detection without manual operation, and can detect multiple batteries at the same time, thereby further improving the operation efficiency.
3. The invention omits the transfer process of the battery, saves manpower and material resources, reduces the possibility of damage to the battery and improves the yield.
4. The detection process is automatically carried out without manual operation, so that deviation of a detection result caused by human factors can be eliminated, and the accuracy of the detection result is improved.
Drawings
Fig. 1 is a schematic diagram of a detection device applied to a cylindrical battery.
Fig. 2 is a schematic view of a part of the battery feeding mechanism according to the present invention.
Fig. 3 is a schematic view of the dust removing mechanism and the housing inspection mechanism of the present invention.
Fig. 4 is a schematic diagram of a cell height detection mechanism according to the present invention.
FIG. 5 is a schematic diagram of a pressure test mechanism according to the present invention.
FIG. 6 is a schematic view of another embodiment of the pressure test mechanism of the present invention.
The figure comprises the following components:
the shell inspection mechanism 1, the inspection support frame 11, the vision sensor 12, the illumination light source 13, the battery cell height detection mechanism 2, the detection support frame 21, the detection lifting frame 22, the second lifting drive assembly 23, the contact head 24, the measuring piece 25, the distance sensor 26, the pressure-resistant test mechanism 3, the pressure-resistant support frame 31, the pressure-resistant lifting frame 32, the measuring head 33, the first lifting drive assembly 34, the lifting seat 341, the buffer part 342, the spring 35, the battery conveying line 4, the support assembly 41, the conveying belt 42, the conveying jig 43, the drive assembly 44, the battery feeding mechanism 5, the feeding support frame 51, the feeding lifting frame 52, the feeding moving frame 53, the conveying assembly 54, the clamping jaw cylinder 541, the clamping piece 542, the concave portion 543, the feeding drive arm 55, the battery positioning mechanism 6, the dust removing mechanism 7, the dust removing support frame 71, the dust removing seat 72 and the dust removing piece 73.
Detailed Description
In order to facilitate an understanding of the present invention by those skilled in the art, the present invention will be described in further detail with reference to specific examples and drawings.
Example 1
Referring to fig. 1 to 6, the present invention provides a detection device for a cylindrical battery, comprising: the battery cell height detection device comprises a shell inspection mechanism 1, a battery cell height detection mechanism 2, a battery conveying line 4, a battery feeding mechanism 5 and a battery positioning mechanism 6. In this embodiment, a central control system is additionally provided, each mechanism is connected to the central control system, and is controlled by the central control system to perform actions, and the detection data is uploaded to the central control system, where the central control system may use a computer.
Wherein: a housing inspection mechanism 1 for inspecting the housing of the cylindrical battery; the cell height detection mechanism 2 is used for detecting the installation height of the cell; the withstand voltage test mechanism 3 is used for performing withstand voltage test on the battery; the battery conveying line 4 is used for conveying cylindrical batteries among the shell checking mechanism 1, the battery cell height detecting mechanism 2 and the voltage withstand testing mechanism 3; the battery feeding mechanism 5 is used for transferring the cylindrical batteries to the battery conveying line 4; a battery positioning mechanism 6 is arranged on the battery conveying line and is used for positioning the battery.
The battery feeding mechanism 5, the shell checking mechanism 1, the battery cell height detecting mechanism 2 and the withstand voltage testing mechanism 3 are sequentially arranged on one side of a battery transmission line; the batteries pass through the shell inspection mechanism 1, the battery cell height detection mechanism 2 and the voltage withstand test mechanism 3 in sequence under the transmission of the battery conveying line 4 to carry out corresponding tests.
The pressure-resistant testing mechanism 3 comprises a pressure-resistant supporting frame 31, a pressure-resistant lifting frame 32 movably connected with the pressure-resistant supporting frame 31, a measuring head 33 movably connected to the pressure-resistant lifting frame 32, a first lifting driving assembly 34 arranged on the pressure-resistant supporting frame 31 and used for driving the pressure-resistant lifting frame 32 to move, and a spring 35 arranged between the measuring head 33 and the pressure-resistant supporting frame 31. The first elevation driving assembly 34 may drive the pressure-resistant elevation frame 32 to move downward so that the measuring head 33 is in contact with the battery cell of the battery. The withstand voltage lifting frame 32 may be provided in plural numbers so as to facilitate the withstand voltage test of plural batteries at the same time. The spring 35 can play a role in buffering when the measuring head 33 is contacted with the battery cell, so that the damage of the measuring head 33 to the battery cell is avoided. In the present embodiment, the pressure-resistant lifting frame 32 is provided with four, and the measuring heads 33 are correspondingly provided with four. In addition, the measuring head 33 is specifically connected to the pressure-resistant lifting frame 32 through a connecting rod, the upper end of the connecting rod passes through the pressure-resistant connecting frame, a guide plate is arranged at the upper end of the connecting rod, a guide rod is arranged at the bottom of the guide plate, and the guide rod is movably connected with the pressure-resistant lifting frame 32. In the case where the pressure-resistant lifter 32 moves downward, the measuring head 33 is in contact with the cell, and the pressure-resistant lifter 32 is still moved downward by a certain distance in order to ensure close contact between the measuring head 33 and the cell, the measuring head 33 is moved upward with respect to the pressure-resistant lifter 32. The withstand voltage test is a nondestructive test for detecting whether the insulating ability of a product is acceptable under a transient high voltage which often occurs, and for applying a high voltage to the tested product for a certain period of time to ensure that the insulating ability of the tested product is sufficiently strong. Another reason for performing this test is that it can also detect some defects in the product. In the pressure-resistant test process, leakage current generated by the tested product under test voltage output by the high-voltage machine is compared with set judgment current, if the detected leakage current value is smaller than a preset value, the tested product passes the test, and when the detected leakage current is larger than the judgment current, the test voltage is cut off instantaneously and an audible and visual alarm is sent out. In general, the type of defects that can be detected by the withstand voltage test are such as too weak insulation strength of the insulating material, pinholes on the insulator, insufficient distance between components, and breakage of the insulator due to extrusion. The withstand voltage test is a test of a range value, a preset value is adjusted according to different products, and whether the failure exists is judged according to comparison of the detection value and the preset value.
The detection device applied to the cylindrical battery further comprises a dust removing mechanism 7 arranged between the battery feeding mechanism 5 and the housing checking mechanism 1, the dust removing mechanism 7 comprises a dust removing support frame 71, a dust removing seat 72 movably connected to one side of the dust removing support frame, facing the battery conveying line 4 mechanism, and a plurality of dust removing pieces 73 arranged on the dust removing seat 72. The dust removing member 73 can be sleeved at the upper end of the battery, and negative pressure is used for sucking away dust on the battery, so that the dust is prevented from affecting subsequent detection. Specifically, the dust removing member 73 needs to cover the position of the battery case rolling groove. In this embodiment, the number of the dust removing members 73 is two, and the dust removing operation of two batteries can be performed at a time. The dust mount 72 may be coupled to an additional drive mechanism, such as a cam drive mechanism.
The battery conveying line 4 comprises a supporting component 41, a conveying belt 42 arranged on the supporting component 41, a plurality of conveying jigs 43 uniformly arranged on the conveying belt 42, and a driving component 44 for driving the wheel component of the conveying belt 42, wherein the driving component 44 is in transmission connection with the conveying belt 42 through a transmission belt. The drive assembly 44 may drive the conveyor belt 42 to move in steps and stop when the battery reaches the corresponding mechanism.
The housing inspection mechanism 1 includes an inspection support 11, at least one vision sensor 12 disposed on the inspection support, and an illumination source 13 disposed on the inspection support 11. The vision sensor 12 can be connected with a central control system which is additionally arranged, after the vision sensor 12 acquires the battery shell image, the image is transmitted to the central control system, and the central control system compares the acquired image with the standard product image to judge whether the battery shell meets the design standard. The housing inspection mechanism 1 can inspect whether the battery housing meets design criteria, such as detecting the inner diameter of the rolling groove, the groove width of the rolling groove, the height of the upper edge of the rolling groove, and the outer diameter of the housing, wherein the tolerance of the above items is + -0.1, for example, 60 series batteries, the inner diameter of the rolling groove is 56 + -0.1 mm, the groove width of the rolling groove is 1.8 + -0.1 mm, the height of the upper edge of the rolling groove is 9.3 + -0.1 mm, and the outer diameter of the housing is 60 + -0.1 mm. In addition, the housing inspection mechanism 1 can also be used to inspect the surface of the housing for defects.
The battery feeding mechanism 5 comprises a feeding support frame 51, a feeding lifting frame 52 movably connected with the feeding support frame 51, a feeding movable frame 53 movably connected with the feeding lifting frame 52, at least one carrying assembly 54 for carrying batteries is arranged on the feeding movable frame 53, a feeding driving arm 55 is rotatably connected to the feeding support frame 51, and one end of the feeding driving arm 55 is connected with the feeding movable frame 53. The feeding lifting frame 52 can move along the vertical direction, the feeding moving frame 53 can move along the horizontal direction, and the feeding driving arm 55 is connected with the feeding moving frame 53 to form a structure similar to a rocker sliding block, so that when the driving arm rotates, the feeding moving frame 53 is pushed to realize the movement in the horizontal direction and the vertical direction, and further realize the actions of grabbing a battery from a position, moving to the position above a battery conveying line and putting down the battery. The drive arm may be coupled to a further drive mechanism, such as a cam drive mechanism.
The carrying unit 54 includes a holding member 542 provided at an output end of the holding member 541, the holding member 542 having an inner recess 543 to be matched with the battery case, and a holding member cylinder 541 connected to the loading moving frame 53. The clamping jaw cylinder 541 can drive the two clamping members 542 to clamp the battery from the upper end of the battery, so as to realize the transportation. The handling assembly 54 may be provided in plural numbers to enable simultaneous handling of plural batteries at a time. In this embodiment, four handling units 54 are provided to handle four batteries at a time.
The battery cell height detection mechanism 2 comprises a detection support frame 21, a detection lifting frame 22 movably connected with the detection support frame 21, a second lifting driving assembly 23 arranged on the detection support frame 21 and used for driving the detection lifting frame 22 to move, a contact head 24 arranged on the detection lifting frame 22, the contact head 24 and the detection lifting frame 22 are movably connected, the upper end of the contact head 24 penetrates through the detection lifting frame 22, the upper end of the contact head 24 is connected with a measuring piece 25, and the detection lifting frame 22 is provided with a distance sensor 26 corresponding to the measuring piece 25. When the detecting crane 22 moves down and the contact head 24 contacts with the battery cell, the contact head 24 moves up relative to the detecting crane 22 and the measuring member 25 also moves up, and the distance sensor 26 detects the distance of the measuring member 25, so as to calculate the height of the battery cell. A spring 35 is connected between the contact head 24 and the detection lifting frame 22. The spring 35 can play a role in buffering, so that the damage to the battery cell caused by the measuring piece 25 is avoided. In addition, a plurality of contacts 24 may be provided, and a plurality of batteries may be tested at the same time. In this embodiment, two detecting lifters 22 are provided, and two corresponding contact heads 24 are provided.
The first lifting driving assembly 34 and the second lifting driving assembly 23 both comprise a lifting seat 341, a buffer part 342 is arranged on the lifting seat 341, the buffer part 342 of the first lifting driving assembly 34 is connected with the pressure-resistant lifting frame 32, and the buffer part 342 of the second lifting driving assembly 23 is connected with the detection lifting frame 22. The buffer member 342 may play a role of buffering when the pressure-resistant crane 32 or the inspection crane 22 moves down, preventing damage to the battery caused by the corresponding member. The number of buffer members 342 corresponds to the number of the pressure-resistant lifters 32 or the inspection lifters 22. The elevating socket 341 may be connected to a driving mechanism, such as a cam driving mechanism, which is additionally provided.
The battery positioning mechanism 6 comprises two symmetrical positioning enclasping components arranged on two sides of the conveying belt 42, wherein the positioning enclasping components specifically comprise a battery positioning bracket, a battery positioning rotating shaft arranged on the battery positioning bracket, and a plurality of enclasping pieces connected with the battery positioning rotating shaft and used for enclasping batteries, and the number of enclasping pieces is determined according to the number of the simultaneous positioning batteries. In this embodiment, the battery positioning mechanisms 6 are disposed at positions corresponding to the battery cell height measuring mechanism and the voltage withstanding detecting mechanism, wherein, since the battery cell height detecting mechanism 2 measures two batteries simultaneously, the battery positioning mechanism 6 only needs to position two batteries correspondingly, and the voltage withstanding detecting mechanism needs to position four batteries correspondingly. The battery positioning shaft may be coupled to an additional drive mechanism, such as a cam drive mechanism.
When the detection of the items is finished, the defective products are marked, and the battery conveying line conveys the defective products to the positions corresponding to the defective product discharging mechanisms, the defective product discharging mechanisms can take out the defective products from the conveying line and store the defective products to corresponding defective product discharging positions, and the defective products are analyzed and repaired later. In addition, the electric core height detecting mechanism 2 and the withstand voltage testing mechanism 3 may also be provided with a jacking component for jacking up the batteries on the conveying belt 42.
Example 2
The invention also provides a detection method of the cylindrical battery, which is applied to the detection device of the cylindrical battery and comprises the following steps: transferring a cylindrical battery to be detected onto a battery conveying line, covering the upper end of the battery by a dust removing mechanism 7 to remove dust from the cylindrical battery, checking one end of the cylindrical battery with a rolling groove by a shell checking mechanism 1, detecting the height of a battery cell of the cylindrical battery by a cell height detecting mechanism 2, and performing a voltage withstand test on the battery cell by a voltage withstand test mechanism 3; in the process of conveying the cylindrical batteries, the conveying line needs to be suspended when the batteries to be detected reach a testing station; the shell inspection mechanism 1, the battery cell height detection mechanism 2 and the withstand voltage test mechanism 3 are all connected with a central control system, the detection results are uploaded to the central control system, the central control system stores the test results, defective products are marked, and defective information is recorded. The dust removal, appearance inspection, battery cell height detection and voltage withstand test of the battery can be continuously carried out without frequent transfer.
The detection method comprises the following steps:
step one, providing a cylindrical battery to be detected, wherein a battery feeding mechanism 5 transfers the battery to a battery conveying line, and the provision of the cylindrical battery can be realized through a feeding line which is additionally arranged;
step two, the battery conveying line stops after conveying the battery to the corresponding position of the dust removing mechanism 7, the dust removing head moves downwards to suck away the dust at the upper end of the cylindrical battery, and the influence of the dust on the subsequent detection process can be avoided after the dust is removed;
step three, the battery is conveyed to the shell inspection mechanism 1 by the battery conveying line and then stopped, the visual sensor 12 of the shell inspection mechanism 1 acquires images of the cylindrical battery, the images are compared with standard product images, if defective products are detected, the images are marked, the standard product images can be stored in a central control system in advance, the appearance inspection can be used for inspecting the inner diameter of a rolling groove, the groove width of the rolling groove, the upper edge height of the rolling groove, the outer diameter of a shell and other dimensional parameters, and also can be used for inspecting the surface defects of the shell, and the central control system can be used for adopting a computer;
step four, the battery is stopped after being conveyed to the battery cell height detection mechanism 2 by the battery conveying line, the battery is positioned by the battery positioning mechanism 6 corresponding to the battery cell height detection mechanism 2, the contact head 24 of the battery cell height detection mechanism 2 moves downwards to contact the battery cell, the height of the battery cell is detected, detected data are uploaded to the central control system, and if defective products are detected, marking is carried out;
step five, the battery conveying line stops after conveying the battery to the voltage withstand test mechanism 3, the measuring head 33 of the voltage withstand test mechanism 3 moves downwards to contact the battery core, voltage withstand test is carried out on the battery core, detected data are uploaded to the central control system, and if defective products are detected, marking is carried out;
step six, the battery conveying line conveys the tested cylindrical batteries, screens out marked defective products, and screens out the compared defective products can be realized through a defective product blanking mechanism which is additionally arranged;
step seven, collecting the screened defective products, checking the defective products, analyzing the defective reasons and improving the defective products, if the defect of the defective products can be overcome after improvement, the scrapping amount can be reduced, and the production cost is saved;
in the third, fourth and fifth steps, the detection result of the battery is uploaded to a central control system, the central control system stores the detection result, marks defective products and records defective information, and the central control system can be connected with a user terminal so as to conveniently retrieve product information for tracing;
in the fifth step, the sampling rate of the withstand voltage test is 30 ms-500 ms/time, the voltage is 1500V, and the resistance is 200mΩ.
In the third step, the vision sensor 12 of the shell inspection mechanism 1 acquires a plurality of images of the cylindrical battery, fuses the images to obtain a fused image, compares the fused image with a standard product image, and judges whether the rolling groove of the cylindrical battery has defects; the acquiring of the plurality of images of the cylindrical battery means: multiple images with different illumination intensities or multiple images with different exposure degrees or multiple images with different angles or multiple images with different illumination angles are acquired. Different defects behave differently under different conditions, and a plurality of images are acquired, so that the accuracy of the defects of the battery case can be checked. When a plurality of images with different illumination intensities are acquired, a plurality of different illumination intensities can be set, and the images with different illumination intensities are acquired respectively. Multiple images with different exposure degrees are acquired, and multiple different exposure degrees (such as multiple exposure times) can be set, so that images with different exposure degrees are acquired respectively. Or multiple images at different angles are acquired, the respective vision sensors 12 may be arranged in multiple different directions, each sensor acquiring a corresponding image. Multiple images under different illumination angles are acquired, multiple light sources in different directions can be set, and the images under the illumination of the light sources in different directions are respectively acquired. Of course, the above different situations may be combined in implementation, for example, a plurality of images under different angles are obtained under different illumination intensities, or a plurality of images under different illumination angles are obtained, and specifically, the setting is performed according to the defect of the actual inspection. The defects of the battery are obvious under the condition of high illumination intensity, are obvious under the irradiation of light rays with specific angles, are obvious under specific directions and the like, so that more defect imaging information of the detected battery can be obtained by images acquired under different conditions. By setting different conditions to acquire images of the product, different types of defects can be imaged as much as possible, so that the defects are easier to automatically judge, the accuracy of automatic detection is improved, the imaging under different conditions can cover various types of defects as much as possible, and the omission frequency can be reduced. After a plurality of images are acquired and fused, image information under different conditions can be fused, and an appearance detection model is continuously perfected in the detection process.
According to the invention, the shell inspection mechanism 1, the battery cell height detection mechanism 2, the voltage withstand test mechanism 3 and the battery positioning mechanism 6 are arranged, under the cooperation of the battery feeding mechanism 5 and the battery conveying mechanism, the battery stops to detect corresponding items when being conveyed to the corresponding position of each mechanism, the whole detection process is strong in continuity, the battery is not required to be frequently transferred, a large amount of time is saved, the operation efficiency is improved, and the production cost is reduced. The invention realizes automation from battery charging to detection, and further improves the operation efficiency without manual operation. The invention omits the transfer process of the battery, saves manpower and material resources, reduces the possibility of damage to the battery and improves the yield. The detection process is automatically carried out without manual operation, so that deviation of a detection result caused by human factors can be eliminated, and the accuracy of the detection result is improved.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated is merely for convenience of describing the present invention and simplifying the description, and is not indicative or implying that the apparatus or elements in question must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "connected," "fixed" and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
While the invention has been described in conjunction with the specific embodiments above, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, all such alternatives, modifications, and variations are included within the scope of the appended claims.
Claims (9)
1. A detection device for a cylindrical battery, comprising:
the shell checking mechanism is used for detecting the shell of the cylindrical battery;
the battery cell height detection mechanism is used for detecting the installation height of the battery cell;
the withstand voltage test mechanism is used for performing withstand voltage test on the battery;
the battery positioning mechanism is used for positioning the battery;
the shell checking mechanism, the battery cell height detecting mechanism and the withstand voltage testing mechanism are sequentially arranged;
the pressure-resistant testing mechanism comprises a pressure-resistant supporting frame, a pressure-resistant lifting frame movably connected with the pressure-resistant supporting frame, a measuring head movably connected to the pressure-resistant lifting frame, a first lifting driving assembly arranged on the pressure-resistant supporting frame and used for driving the pressure-resistant lifting frame to move, and a spring arranged between the measuring head and the pressure-resistant supporting frame;
the detection device applied to the cylindrical battery further comprises a battery conveying line for conveying the cylindrical battery among the shell inspection mechanism, the battery cell height detection mechanism and the voltage withstand test mechanism, wherein the battery conveying line comprises a support assembly, a conveying belt arranged on the support assembly, a plurality of conveying jigs uniformly arranged on the conveying belt, and a driving assembly for driving the conveying belt wheel assembly, and the driving assembly is in transmission connection with the conveying belt through a transmission belt;
the battery cell height detection mechanism comprises a detection support frame, a detection lifting frame movably connected with the detection support frame, a second lifting driving assembly arranged on the detection support frame and used for driving the detection lifting frame to move, and a contact head arranged on the detection lifting frame, wherein the contact head is movably connected with the detection lifting frame, the upper end of the contact head penetrates through the detection lifting frame, the upper end of the contact head is connected with a measuring piece, and the detection lifting frame is provided with a distance sensor corresponding to the measuring piece; a spring is connected between the contact head and the detection lifting frame; the battery positioning mechanism is arranged on the battery conveying line.
2. The device of claim 1, wherein the housing inspection mechanism comprises an inspection support, at least one vision sensor disposed on the inspection support, and an illumination source disposed on the inspection support.
3. The detection device for cylindrical batteries according to claim 1, wherein the detection device for cylindrical batteries further comprises a battery feeding mechanism, the battery feeding mechanism comprises a feeding support frame, a feeding lifting frame movably connected with the feeding support frame, a feeding movable frame movably connected with the feeding lifting frame, at least one carrying assembly for carrying the batteries is arranged on the feeding movable frame, a feeding driving arm is rotatably connected to the feeding support frame, and one end of the feeding driving arm is connected with the feeding movable frame.
4. The device for detecting cylindrical batteries according to claim 3, wherein the handling assembly comprises a clamping jaw cylinder connected with the feeding moving frame, and a clamping piece arranged at the output end of the clamping jaw cylinder, wherein the clamping piece is provided with an inner concave part matched with the battery shell.
5. The detection device for cylindrical batteries according to claim 3, further comprising a dust removing mechanism arranged between the battery feeding mechanism and the housing checking mechanism, wherein the dust removing mechanism comprises a dust removing support frame, a dust removing seat movably connected to one side of the dust removing support frame, and a plurality of dust removing pieces arranged on the dust removing seat.
6. The device for detecting a cylindrical battery according to claim 1, wherein the first lifting driving assembly and the second lifting driving assembly each comprise a lifting seat, a buffer member provided on the lifting seat, the buffer member of the first lifting driving assembly is connected with the pressure-resistant lifting frame, and the buffer member of the second lifting driving assembly is connected with the detection lifting frame.
7. A method for detecting a cylindrical battery, wherein the detection device for a cylindrical battery according to any one of claims 1 to 6 is applied, the method comprising: transferring a cylindrical battery to be detected onto a battery conveying line, covering the upper end of the battery by a dust removing mechanism to remove dust from the cylindrical battery, checking one end of the cylindrical battery with a rolling groove by a shell checking mechanism, detecting the height of a battery cell of the cylindrical battery by a cell height detecting mechanism, and performing a voltage withstanding test on the battery cell by a voltage withstanding testing mechanism; in the process of conveying the cylindrical batteries, the conveying line needs to be suspended when the batteries to be detected reach a testing station; the shell inspection mechanism, the battery cell height detection mechanism and the voltage withstand test mechanism are all connected with a central control system, the detection result is uploaded to the central control system, the central control system stores the detection result, defective products are marked, and defective information is recorded.
8. The method for detecting a cylindrical battery according to claim 7, comprising the steps of:
step one, providing a cylindrical battery to be detected, and transferring the battery to a battery conveying line by a battery feeding mechanism;
step two, the battery conveying line conveys the battery to a position corresponding to the dust removing mechanism, then the battery is stopped, the dust removing head moves downwards, and dust at the upper end of the cylindrical battery is sucked away;
thirdly, the battery is conveyed to a shell inspection mechanism by a battery conveying line and then stopped, a visual sensor of the shell inspection mechanism acquires an image of the cylindrical battery, the image is compared with a standard product image, and if defective products are detected, marking is carried out;
step four, the battery is conveyed to a battery cell height detection mechanism by a battery conveying line and then stopped, the battery is positioned by a battery positioning mechanism corresponding to the battery cell height detection mechanism, a contact head of the battery cell height detection mechanism moves downwards to contact with the battery cell, the height of the battery cell is detected, and if defective products are detected, marking is carried out;
step five, the battery is conveyed to a voltage withstand test mechanism by a battery conveying line and then stopped, a measuring head of the voltage withstand test mechanism moves downwards to contact with the battery core, voltage withstand test is carried out on the battery core, and if defective products are detected, marking is carried out;
step six, the battery conveying line conveys the tested cylindrical batteries away, and the marked defective products are screened out;
step seven, collecting the screened defective products, checking the defective products, analyzing the reasons of the defective products and improving the defective products;
and step three, step four and step five, uploading the detection result of the battery to a central control system, and storing the test result by the central control system, marking defective products and recording defective information.
9. The method for detecting a cylindrical battery according to claim 8, wherein in the third step, a visual sensor of the housing inspection mechanism acquires a plurality of images of the cylindrical battery, and fuses the plurality of images to obtain a fused image, and compares the fused image with a standard product image to determine whether a rolling groove of the cylindrical battery has a defect; the acquiring of the plurality of images of the cylindrical battery means: multiple images with different illumination intensities or multiple images with different exposure degrees or multiple images with different angles or multiple images with different illumination angles are acquired.
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