CN111366073A - Device and method for evaluating gas production rate of soft package battery cell in pre-charging process based on three-dimensional laser scanning - Google Patents
Device and method for evaluating gas production rate of soft package battery cell in pre-charging process based on three-dimensional laser scanning Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/002—Measuring arrangements characterised by the use of optical techniques for measuring two or more coordinates
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
- G01B11/167—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge by projecting a pattern on the object
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
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Abstract
The invention provides a device and a method for evaluating gas production rate in a soft package battery cell pre-charging process based on three-dimensional laser scanning, and the specific method comprises the following steps: acquiring a three-dimensional space coordinate of a soft package battery cell to be evaluated through a three-dimensional scanner, extracting object surface information by using a Delaunay triangulation network method, and reconstructing a three-dimensional curved surface effect graph M; and step two, dividing the three-dimensional curved surface effect graph M reconstructed in the step one into N small cubes, calculating the volume of each small cube to obtain a volume Vi, and finally obtaining the total volume Vm of the soft package battery cell by overlapping the divided volumes. The invention adopts the three-dimensional scanning technology to directly measure the volume of each battery cell on the pre-charging production line, and the measuring method is simple and convenient and is very suitable for large-scale automatic production line production; the change in the production process of the soft package battery cell can be monitored at any time, the change caused by processes, equipment, raw materials and the like can be searched in time, and the consistency of products is ensured.
Description
Technical Field
The invention belongs to the field of battery manufacturing, and particularly relates to a device and a method for evaluating gas production in a soft package battery cell pre-charging process based on three-dimensional laser scanning.
Background
The soft package battery has great development potential as a basic form of a new energy battery. Compared with cylindrical batteries and square batteries, the soft package battery pack has better safety performance due to the adoption of the aluminum plastic film for soft package; the internal resistance of the soft package battery is relatively small, so that the self-power consumption of the battery can be greatly reduced, the cyclicity of the battery is better, and the service life of the battery is longer; in addition, the soft package can also increase the space utilization rate and improve the energy density. As the most important basic composition unit of the pouch battery, the quality of the pouch battery directly determines the performance of the battery pack. During the manufacturing process of the soft package cell product, the cell needs to be activated through a pre-charging process, and a series of complex electrochemical reactions occur in the process, so that an SE working film is formed and gas is generated. The gas production of the battery core is an important basis for evaluating the performance of the battery core and analyzing the internal electrochemical reaction mechanism of the battery core, and is beneficial to improving the material formula, the preparation process flow and the like of manufacturers. Currently, the most common assessment method in the industry is to utilize archimedes drainage method to test the gas production before and after the pre-filling process, and the existing related patents (such as CN101673850, CN206146492U and CN 109738329A) basically assess the gas production of the battery cell based on the method. However, this approach has several significant drawbacks: 1. the operation is slow, and more manpower is needed; 2. only individual samples can be selected for measurement, and all the battery cell products cannot be accurately tracked; 3. the battery cell needs to be soaked, so that on one hand, the battery cell is adversely affected, and on the other hand, the battery cell can be pre-charged after being dried for a long time (the working procedure is complicated and the time is too long); 4. usually, manual measurement is needed, which easily causes large error and damages the battery cell. Based on this, the conventional measurement and evaluation method cannot meet the current high standard requirement of large-scale industrial production and market on the increasing of the battery cell products (especially power battery products), and a new method which can adapt to large-scale automatic production and can quickly and accurately evaluate and monitor the gas production rate of the battery cell products in batches is urgently needed to be developed.
Disclosure of Invention
In view of the above, the present invention provides a method for evaluating gas production during the pre-charging process of a flexible package cell based on three-dimensional laser scanning, so as to achieve the purposes of rapidly and accurately measuring gas production during the pre-charging process of the flexible package cell and evaluating the appearance defects of rejection cells.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a device for evaluating gas production rate in a soft-package battery cell pre-charging process based on three-dimensional laser scanning comprises a three-dimensional scanner and a soft-package battery cell clamp;
soft-packaged electrical core anchor clamps are for having the mechanical fixture of flexible function, and the flexible orbit department at soft-packaged electrical core anchor clamps is established to electric core pre-charging groove, and three-dimensional scanner arranges soft-packaged electrical core anchor clamps one side in and can scan this soft-packaged electrical core anchor clamps position department.
A method for evaluating gas production rate of a soft package battery cell in a pre-charging process based on three-dimensional laser scanning comprises the following specific steps:
acquiring a three-dimensional space coordinate of a soft package battery cell to be evaluated through a three-dimensional scanner, extracting object surface information by using a Delaunay triangulation network method, and reconstructing a three-dimensional curved surface effect graph M;
step two, dividing the three-dimensional curved surface effect graph M reconstructed in the step one into N small cubes, calculating the volume of each small cube to obtain a volume Vi, and finally obtaining the total volume Vm of the soft package battery cell through superposition of the divided volumes;
the small three-dimensional scanner not only measures the volume of the soft package battery, but also is used for evaluating the appearance of the soft package battery core.
Thirdly, calculating the flatness tolerance of the reconstructed three-dimensional curved surface effect graph M of the soft package cell to be evaluated through the curved surface, finding out the sharp change in a small range on the surface of the soft package cell, and if the sharp change exceeds 1-3%, regarding the soft package cell as an unqualified soft package cell and not performing the subsequent evaluation step;
step four, pre-charging the soft-package battery cell to be evaluated, and then obtaining the total volume Vn of the soft-package battery cell by using the methods in the step one and the step two;
and step five, obtaining the gas yield Vn-Vm of the pre-charged soft-package battery cell.
And furthermore, giving a corresponding identification code to the surface of the soft-package battery cell to be evaluated in the step one, firstly scanning the identification code by using a three-dimensional scanner, giving a unique identity mark record to the soft-package battery cell, then scanning the form of the soft-package battery cell, and correspondingly recording the gas yield of the soft-package battery cell obtained in the step five and the unique identity mark of the soft-package battery cell.
Further, in the step one, a middle seal line of the soft-package battery core is used as a reference, the soft-package battery core is divided into two working faces by the reference, the three-dimensional scanner respectively scans the two working faces, and scanning information of the two working faces is spliced to obtain a three-dimensional space coordinate of the soft-package battery core.
When a code is printed on one working face, the other working face does not have the code, the faces with the code and the faces without the code are respectively scanned, and the scanning information is combined to form the three-dimensional structure of the whole soft package battery cell.
And furthermore, the volume of each small cube in the second step is obtained in a mode that a triangle obtained by a Delaunay triangulation network method is projected by taking a middle seal line of the soft package battery cell as a reference surface, and the volume Vi of a single cube is calculated by utilizing a Helen formula and a projection point height coordinate.
Further, adding deformation evaluation into the screening conditions of the unqualified soft-packaged battery cell in the step three, wherein the relation between the deformation evaluation and the sharp change evaluation standard is equal to or;
the deformation evaluation method comprises the steps of selecting a soft-package battery cell as a standard soft-package battery cell, obtaining a total volume Vb and a triangular network normal dimension curved surface effect graph B of the standard soft-package battery cell by utilizing the modes of the first step and the second step, fitting and comparing the triangular network normal dimension curved surface effect graph M of the soft-package battery cell to be evaluated with the triangular network normal dimension curved surface effect graph B, and judging the soft-package battery cell as an unqualified soft-package battery cell when the fitting deviation exceeds 2%.
Further, the thickness of the sol of the soft-package battery cell at the packaging position can be obtained by the method in the first step and the second step, if the average value of the thickness of the whole packaging sol of the soft-package battery cell is greater than 20% of the standard value, the soft-package battery cell is regarded as an unqualified soft-package battery cell, and the relation between the standard value and the judgment standard for the unqualified soft-package battery cell in the third step is yes.
And furthermore, placing the soft package battery cell to be evaluated in a fixture and scanning the soft package battery cell in a three-dimensional mode, scanning the volume and the external form of the fixture in advance through a three-dimensional scanner to obtain specific data, and firstly subtracting the volume value of the soft package battery cell when calculating the gas production rate of the soft package battery cell in the step five.
Furthermore, the three-dimensional scanner is a small three-dimensional laser scanner which is automatically fused with the production line.
Further, in the first step, corresponding bar codes are given to the surface of the soft package battery cell to be evaluated, the soft package battery cell is automatically scanned through a bar code scanning gun, and then the soft package battery cell is scanned through a three-dimensional scanner.
The three-dimensional scanner is combined with the battery cell bar code scanning gun, so that each battery cell is convenient to trace; the three-dimensional scanner and the battery cell bar code scanning gun type number are high in adjustability and can be selected and allocated according to actual conditions.
The method is not only suitable for the production process of soft package battery cell pre-charging, but also suitable for gas production and appearance evaluation in other production processes.
Compared with the prior art, the method for evaluating the gas production rate of the soft package battery cell in the pre-charging process based on three-dimensional laser scanning has the following advantages:
the volume of each battery cell is directly measured on the pre-charging production line by adopting a three-dimensional scanning technology, and the measuring method is simple, convenient, quick and accurate, and is very suitable for large-scale automatic production line production; each soft-package battery cell product can be effectively tracked, the sampling is comprehensive, and the obtained statistical data is solid and reliable; the change in the production process of the soft package battery cell can be monitored at any time, the change caused by processes, equipment, raw materials and the like can be searched in time, and the consistency of products is ensured; conveniently discharge the soft packet of electric core product of unusual appearance, it is bad to reduce the product, promotes the product quality.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the invention without limitation. In the drawings:
fig. 1 is a flowchart of a method for evaluating gas production during a soft-package battery cell pre-charging process based on three-dimensional laser scanning according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an apparatus for evaluating gas production during a soft-package cell pre-charging process based on three-dimensional laser scanning according to an embodiment of the present invention;
fig. 3 is a display of a system for evaluating gas production distribution of a soft package cell based on three-dimensional laser scanning according to an embodiment of the present invention.
Description of reference numerals:
1-a three-dimensional scanner; 2-soft package battery cell clamp; and 3-cell pre-charging groove.
Detailed Description
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which are merely for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.
In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be construed broadly, e.g. as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
The invention will be described in detail with reference to the following embodiments with reference to the attached drawings.
As shown in fig. 2, the device for evaluating the gas production rate in the soft package cell pre-charging process based on three-dimensional laser scanning comprises a three-dimensional scanner 1 and a soft package cell clamp 2;
soft-packaged electrical core anchor clamps 2 are for having the mechanical fixture of flexible function, and electric core pre-charging groove 3 is established in the flexible orbit department of soft-packaged electrical core anchor clamps 2, and three-dimensional scanner 1 arranges soft-packaged electrical core anchor clamps one side in and can scan this soft-packaged electrical core anchor clamps 2 position departments, and the soft-packaged electrical core that treats the aassessment is scanned and is detected by soft-packaged electrical core anchor clamps 2 centre gripping.
Specific telescopic soft-package battery cell anchor clamps 2 can be anchor clamps itself scalable removal also can place anchor clamps and operate on telescopic manipulator, if precharge groove 3 adopts vertical range for practicing thrift the space slotted hole, soft-package battery cell anchor clamps 2 still need have the function of turning to so, need to insert soft-package battery cell in putting 3 precharge grooves in anyway.
As shown in fig. 1, a method for evaluating gas production during soft package cell pre-charging process based on three-dimensional laser scanning specifically includes:
s1, when the cell product before pre-charging is led into a pre-charging production line, the bar code scanning gun automatically scans the bar code of the soft package cell and records the bar code in a computer system;
s2, with the middle seal line of the soft-packaged battery cell as a reference surface, respectively scanning a code-spraying surface and a back surface (code-spraying-free surface) of the battery cell from the battery cell by a small three-dimensional laser scanner, wherein the scanning sequence of each surface can be from the anode ear side to the cathode ear side (taking a VDA standard battery cell as an example), and combining the two scanned surfaces to form the whole surface information condition of the battery cell, so as to obtain the three-dimensional space coordinate of the battery cell; extracting object surface information by using a Delaunay triangulation network method, and reconstructing a three-dimensional curved surface effect graph, wherein the specific method comprises the steps of connecting any two nearest points in a point set into an initial baseline, forming a triangle with another point which is not on the same line and is nearest to the midpoint of the baseline according to a Delaunay triangulation principle, and connecting three sides of the triangle with adjacent points to form the triangle until all the points are contained in the triangle; then, the network curved surface is divided into N small cubes, the volume Vi of a single cube can be calculated by projecting a triangle on a reference surface and utilizing a Helen formula and a projection point height coordinate, and the calculated cell volume Vm is superposed; recording the obtained volume Vm of each integral battery cell (comprising a main body and an air bag) into a computer system, and corresponding to the bar codes of the battery cells one to one;
meanwhile, the surface concave deformation, the whole deformation, the encapsulated sol thickness and the like of the battery cell are judged in a software system, the battery cell with overlarge standard deviation is discharged through a mechanical arm, and then the secondary judgment is carried out manually. Finding sharp changes of the small-range depth of the main body part of the battery core by measuring and calculating flatness tolerance of a curved surface (the flatness tolerance measurement belongs to the known technology of finding sharp changes on a plane or a curved surface), wherein the sharp changes exceed 2 percent and are discharged; because the shapes of the battery cells are uniform, fitting deviation of the battery cells is more than 2% through fitting with the standard shapes, and then discharging; if the average value of the measured and calculated sol thickness is more than 20 percent, the position thickness exceeds the process standard range, the position thickness is taken as an unqualified soft package battery cell, and then the position thickness is discharged out of an evaluation line without subsequent steps;
s3, after the normal pre-charging process is finished, the corresponding volume of each battery cell (the edge shape of the soft package battery cell is fixed, and the volume expansion after gas production almost only changes the height coordinate of the cube) can be very easily obtained through the three-dimensional optical scanner by the same method as the method in S2 and is recorded as Vn; because the soft-package battery cell has no hard shell, the gas generated by pre-charging can be totally reflected in the volume change of the appearance, so the pre-charging gas production rate of the soft-package battery cell is Vn-Vm.
The brand and model of the bar code scanning gun and the small three-dimensional laser scanner have no specific requirements and can be selected according to actual conditions;
a clamp is arranged in the three-dimensional laser scanning process, the shape and the volume of the clamp are recorded into a system in advance, and the clamp is removed when the volume is calculated;
because the appearance of the soft package battery cell is regular, the main body part is a combination of almost standard cubes, the standard appearance can be directly recorded, partial deviation and integral deviation are calculated by equipment software during the first three-dimensional laser scanning, and the part deviation and the integral deviation exceed any standard deviation range and are discharged;
due to the characteristic that the aluminum plastic film on the outer side of the soft-package battery cell has no binding effect on the gas generated in the battery cell, the gas generated by pre-charging can be totally reflected in the volume change of the battery cell, so that the method is only suitable for evaluating the gas generated by the soft-package battery cell; for other types of cells (such as square and cylindrical cells), the gas generated by pre-charging cannot be reflected on the cell volume due to the rigid and invariable casing, so that the method is not applicable.
The scatter plot in fig. 3 represents the gas production of each cell measured using the method, and the single point represents the gas production of one cell, allowing a view of the gas production distribution of the cells within the test range. In the figure, it can be seen that the gas production of most cells is distributed in the range of 20-30 mL, but the gas production of individual cells is too much/too little, for example, the gas production of the cell with the serial number 29 reaches about 39mL, which is obviously higher than that of other cells, so that the cell is feared to be problematic, and therefore, the cell can be found by scanning the code in the system, and the reason for discharge or analysis is given.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the invention, so that any modifications, equivalents, improvements and the like, which are within the spirit and principle of the present invention, should be included in the scope of the present invention.
Claims (9)
1. The utility model provides a device based on soft packet of electricity core precharge process gas production of three-dimensional laser scanning aassessment which characterized in that: the device comprises a three-dimensional scanner and a soft package battery cell clamp;
soft-packaged electrical core anchor clamps are for having the mechanical fixture of flexible function, and the flexible orbit department at soft-packaged electrical core anchor clamps is established to electric core pre-charging groove, and three-dimensional scanner arranges soft-packaged electrical core anchor clamps one side in and can scan this soft-packaged electrical core anchor clamps position department.
2. A method for evaluating gas production rate of a soft package battery cell in a pre-charging process based on three-dimensional laser scanning is characterized by comprising the following steps: the specific method comprises the following steps:
acquiring a three-dimensional space coordinate of a soft package battery cell to be evaluated through a three-dimensional scanner, extracting object surface information by using a Delaunay triangulation network method, and reconstructing a three-dimensional curved surface effect graph M;
step two, dividing the three-dimensional curved surface effect graph M reconstructed in the step one into N small cubes, calculating the volume of each small cube to obtain a volume Vi, and finally obtaining the total volume Vm of the soft package battery cell through superposition of the divided volumes;
thirdly, calculating the flatness tolerance of the reconstructed three-dimensional curved surface effect graph M of the soft package cell to be evaluated through the curved surface, finding out the sharp change in a small range on the surface of the soft package cell, and if the sharp change exceeds 1-3%, regarding the soft package cell as an unqualified soft package cell and not performing the subsequent evaluation step;
step four, pre-charging the soft-package battery cell to be evaluated, and then obtaining the total volume Vn of the soft-package battery cell by using the methods in the step one and the step two;
and step five, obtaining the gas yield Vn-Vm of the pre-charged soft-package battery cell.
3. The method for evaluating the gas production rate of the soft package cell pre-charging process based on the three-dimensional laser scanning according to claim 2, wherein the method comprises the following steps: and in the first step, giving a corresponding identification code to the surface of the soft-package battery cell to be evaluated, firstly scanning the identification code by using a three-dimensional scanner and giving a unique identity mark record to the soft-package battery cell, and then scanning the form of the soft-package battery cell, wherein the gas yield of the soft-package battery cell obtained in the fifth step is correspondingly recorded with the unique identity mark of the soft-package battery cell.
4. The method for evaluating the gas production rate of the soft package cell pre-charging process based on the three-dimensional laser scanning according to claim 2, wherein the method comprises the following steps: in the first step, a middle sealing line of the soft-package battery cell is used as a reference, the soft-package battery cell is divided into two working faces by the reference, the two working faces are scanned by a three-dimensional scanner respectively, and scanning information of the two working faces is spliced to obtain a three-dimensional space coordinate of the soft-package battery cell.
5. The method for evaluating the gas production rate of the soft package cell pre-charging process based on the three-dimensional laser scanning according to claim 2, wherein the method comprises the following steps: and step two, the volume of each small cube is obtained in a mode that a triangle obtained by a Delaunay triangulation network method is projected by taking a middle seal line of the soft package battery cell as a reference surface, and the volume Vi of a single cube is calculated by utilizing a Helen formula and a projection point height coordinate.
6. The method for evaluating the gas production rate of the soft package cell pre-charging process based on the three-dimensional laser scanning according to claim 2 or 3, wherein the method comprises the following steps: adding deformation evaluation to the screening conditions of the unqualified soft-packaged battery cell in the step three, wherein the evaluation standard of the deformation evaluation and the sharp change evaluation is in an OR relationship;
the deformation evaluation method comprises the steps of selecting a soft-package battery cell as a standard soft-package battery cell, obtaining a total volume Vb and a triangular network normal dimension curved surface effect graph B of the standard soft-package battery cell by utilizing the modes of the first step and the second step, fitting and comparing the triangular network normal dimension curved surface effect graph M of the soft-package battery cell to be evaluated with the triangular network normal dimension curved surface effect graph B, and judging the soft-package battery cell as an unqualified soft-package battery cell when the fitting deviation exceeds 2%.
7. The method for evaluating the gas production rate of the soft package cell pre-charging process based on the three-dimensional laser scanning according to claim 2, wherein the method comprises the following steps: the sol thickness of the soft-package battery cell at the packaging position can be obtained through the methods in the first step and the second step, if the average value of the thickness of the packaging sol of the whole soft-package battery cell is greater than 20% of the standard value, the soft-package battery cell is regarded as an unqualified soft-package battery cell, and the relation between the standard value and the judgment standard of the unqualified soft-package battery cell in the third step is equal to or.
8. The method for evaluating the gas production rate of the soft package cell pre-charging process based on the three-dimensional laser scanning according to claim 2, wherein the method comprises the following steps: and step five, when the gas production amount of the soft package battery cell is calculated, firstly, the volume value of the soft package battery cell is subtracted.
9. The method for evaluating the gas production rate of the soft package cell pre-charging process based on the three-dimensional laser scanning according to claim 2, wherein the method comprises the following steps: and in the first step, corresponding bar codes are given to the surface of the soft-package battery cell to be evaluated, the soft-package battery cell is automatically scanned through a bar code scanning gun, and then the soft-package battery cell is scanned through a three-dimensional scanner.
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| CN112629406A (en) * | 2020-10-28 | 2021-04-09 | 中国核工业华兴建设有限公司 | Oval bottom grouting amount measuring method based on three-dimensional scanner |
| CN115117981A (en) * | 2022-08-26 | 2022-09-27 | 深圳市高健实业股份有限公司 | Chip for programmable control of charging of new energy automobile battery |
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