CN116247307A - Hot-press shaping equipment and process for lithium battery cell - Google Patents
Hot-press shaping equipment and process for lithium battery cell Download PDFInfo
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- CN116247307A CN116247307A CN202310263139.4A CN202310263139A CN116247307A CN 116247307 A CN116247307 A CN 116247307A CN 202310263139 A CN202310263139 A CN 202310263139A CN 116247307 A CN116247307 A CN 116247307A
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/14—Cells with non-aqueous electrolyte
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention discloses hot-pressing shaping equipment and a process of a lithium battery cell, which belong to the technical field of hot-pressing equipment of the lithium battery cell.
Description
Technical Field
The invention relates to the technical field of lithium battery cell hot-pressing equipment, in particular to hot-pressing shaping equipment and process of a lithium battery cell.
Background
In the production process of the lithium battery pack, after the production of the pole pieces is completed, the positive pole piece, the negative pole piece and the diaphragm are assembled and manufactured in a winding or lamination mode to form a basic battery cell, and then the battery cell is subjected to hot-press shaping generally, so that the lithium ion battery cell can be straightened after shaping and avoid retraction and recovery, and the existing battery cell hot-press shaping process comprises the following steps: and placing the coiled or laminated battery cells on a template, setting the pressure of a pressurizing cylinder and the temperature of the template, and then shaping the battery cells by the upper template and the lower template under the action of certain pressure and temperature to achieve the consistency of the thickness of the battery cells, so that the elasticity of the battery cells is reduced, the qualification rate of the battery cells is reduced, and the consistency of the thickness of the battery cells of a finished product is ensured.
However, in the process of winding the positive electrode plate, the negative electrode plate and the diaphragm, the thicknesses of the positive electrode plate, the negative electrode plate and the diaphragm are uneven when the battery core is assembled due to certain ductility, and the thicknesses of the battery core are uneven when the battery core is subjected to hot press shaping in the follow-up process, and certain resilience exists in the battery core when the battery core is subjected to hot press shaping, so that the thickness of the whole diaphragm is uneven and the variation is large, micropores are blocked, the transmission of lithium ions is affected, the internal resistance of the lithium battery is increased, and the service life of the lithium battery is shortened.
Therefore, a hot press shaping device and a process for the lithium battery cell are provided for solving the problems.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems existing in the prior art, the invention aims to provide hot-press shaping equipment and process for a lithium battery cell, which can improve the flatness and consistency of the cell, ensure that the thickness of the cell meets the requirement and has higher consistency, facilitate the cell to enter a shell, simultaneously facilitate the expelling of air in the cell, ensure that a diaphragm and positive and negative pole pieces are tightly attached together, prevent the dislocation deformation of the pole pieces, and shorten the diffusion distance of lithium ions so as to reduce the internal resistance of the battery.
2. Technical proposal
In order to solve the problems, the invention adopts the following technical scheme.
The utility model provides a hot pressing plastic equipment of lithium cell electricity core, includes hot pressing equipment, hot pressing equipment one end fixedly connected with operation box, install a plurality of control switch on the operation box, a plurality of evenly distributed's of fixedly connected with slide bar on the hot pressing equipment, and install the operation board on the hot pressing equipment, install a pair of spacing in the operation board, slide bar top fixedly connected with roof, install the pneumatic cylinder on the roof, the pneumatic cylinder output runs through the roof inner wall and extends to the inboard one end fixedly connected with movable plate of roof, a plurality of evenly distributed's slide hole and a plurality of slide bar sliding connection of seting up on the movable plate, the movable plate downside is provided with operating component, operating component includes hot pressing component and detection component.
Further, the hot pressing assembly comprises a moving box, the whole clamp plate of moving box bottom fixedly connected with, moving plate bottom fixedly connected with L shaped plate, install electric putter on the L shaped plate, electric putter output and moving box one end fixed connection, install servo motor in the moving box, servo motor output fixedly connected with half gear, half gear both sides are provided with a pair of pinion rack of mutual symmetry, and half gear and pinion rack meshing are connected.
Further, one pair of toothed plates keep away from one end each other and are fixedly connected with first connecting plate and second connecting plate respectively, bottom fixedly connected with a plurality of evenly distributed's first hot pressboard, a plurality of evenly distributed's second hot pressboard of second connecting plate bottom fixedly connected with, first hot pressboard and second hot pressboard set up on same horizontal line, and first hot pressboard and the mutual butt of second hot pressboard.
Further, a limit groove is formed in the movable box, a limit rod is fixedly connected to the top end of the toothed plate, and the limit rod is in sliding connection with the limit groove.
Further, the detection assembly comprises a detection box, one end of the detection box is fixedly connected with the movable box, the detection box is externally surrounded and provided with an observation window, the top end of the inner cavity of the detection box is provided with a detection lamp, the lower side of the detection lamp is provided with a blocking plate, the blocking plate is fixedly connected with the inner wall of the detection box, and a plurality of evenly distributed through holes are formed in the blocking plate.
Further, baffle bottom fixedly connected with and a plurality of through-hole quantity assorted safety cover and measuring rod, the measuring rod top is inlayed and is had convex mirror, and installs in the measuring rod inner chamber and be shown the platform, the measuring rod surrounds outward and inlays and have the observation ring, the observation ring sets up on same horizontal line with showing the platform.
Further, the detection rod is surrounded and fixedly connected with a limiting ring, a limiting plate is arranged on the upper side of the limiting ring, a plurality of sliding holes matched with the detection rod are formed in the limiting plate, a plurality of evenly distributed electromagnets are embedded in the limiting plate, and the diameter of each sliding hole is larger than that of the detection rod.
A hot pressing process of hot pressing shaping equipment of a lithium battery cell comprises the following steps:
s1: primary pressing; heating the battery cell and achieving a stress state through primary hot pressing;
s2: prepressing; the stress of the battery core is more dispersed through staggered hot pressing;
s3: carrying out pressure adjustment; the thickness of the battery cell is more uniform through the pressure adjustment;
s4: detecting; detecting the whole voltage battery cell through a detection assembly;
s5: pressure compensation; and correcting and compensating the unqualified area of the battery cell, and then rectifying the unqualified area of the battery cell.
Further, after the power switch of the hydraulic cylinder is started to primarily heat and press the battery core in the S1 and the S2, the power switch of the servo motor is started to further pre-press the primarily heat and press the battery core, so that the thickness of the primarily heat and press battery core is more uniform.
Further, after the voltage-regulated battery cell in the step S4 and the step S5 is detected by the detection component, the voltage-regulated area of the battery cell can be complemented according to the detection result of the detection component, and then the voltage-regulated area is regulated.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) This scheme is provided with hot pressing subassembly and detection component on through hot pressing equipment for after carrying out preliminary hot pressing to the electric core, rethread hot pressing subassembly is to the further pre-compaction back of electric core and is pressed again, through the mode of hot pressing subassembly to the alternating hot pressing of electric core and pressing again, then better messenger's thick limit of diaphragm on the electric core changes comparatively evenly, can improve the planarization and the uniformity of electric core, make electric core thickness satisfy the requirement and have higher uniformity, and do benefit to the electric core and go into the shell, prevent that the thickness variation of diaphragm in the electric core is great, thereby lead to the micropore to be blockked up the transmission that influences lithium ion and increased lithium cell's internal resistance.
(2) According to the scheme, flatness detection is performed on the battery cell after voltage adjustment, and pressure compensation is performed on the convex surface of the concave surface of the battery cell according to feedback of detection, so that the diaphragm and the positive and negative pole pieces are tightly attached together, dislocation deformation of the pole pieces is prevented, and meanwhile, the diffusion distance of lithium ions can be shortened, and the internal resistance of the battery is reduced.
Drawings
FIG. 1 is a schematic perspective view of a hot press apparatus according to the present invention;
FIG. 2 is a schematic view of the operation assembly structure of the present invention;
FIG. 3 is a schematic view of a cross-sectional front view of a hot press assembly according to the present invention;
FIG. 4 is a schematic perspective view of a hot press assembly according to the present invention;
FIG. 5 is a schematic diagram of a front cross-sectional structure of a detection assembly of the present invention;
fig. 6 is a schematic diagram of the structure of fig. 5 a according to the present invention.
The reference numerals in the figures illustrate:
1. hot pressing equipment; 2. a hot pressing assembly; 3. a detection assembly; 4. an operating assembly; 5. a pressure plate; 11. an operation box; 12. a slide bar; 13. a moving plate; 14. a top plate; 15. a hydraulic cylinder; 16. an abutment block; 17. an operation panel; 18. an L-shaped plate; 19. an electric push rod; 21. a moving case; 22. a servo motor; 23. a half gear; 24. a toothed plate; 25. a first connection plate; 26. a second connecting plate; 27. a limit rod; 28. a limit groove; 29. a first hot platen; 30. a second hot platen; 31. a detection box; 32. an observation window; 33. a detection lamp; 34. a blocking plate; 35. a protective cover; 36. a detection rod; 37. a convex mirror; 38. a imaging table; 39. a limiting plate; 40. and a limiting ring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present invention are within the protection scope of the present invention.
In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus 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 relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Examples:
referring to fig. 1-2, a hot-press shaping device for lithium battery cells comprises a hot-press device 1, wherein one end of the hot-press device 1 is fixedly connected with an operation box 11, a plurality of control switches are installed on the operation box 11, a plurality of uniformly distributed slide bars 12 are fixedly connected to the hot-press device 1, an operation plate 17 is installed on the hot-press device 1, a pair of limiting bars are installed in the operation plate 17, a top plate 14 is fixedly connected to the top end of the slide bars 12, a hydraulic cylinder 15 is installed on the top plate 14, the output end of the hydraulic cylinder 15 penetrates through the inner wall of the top plate 14 and extends to one end of the inner side of the top plate 14 to be fixedly connected with a movable plate 13, a plurality of uniformly distributed slide holes formed in the movable plate 13 are slidably connected with the plurality of slide bars 12, an operation assembly 4 is arranged on the bottom side of the movable plate 13, the operation assembly 4 comprises a hot-press assembly 2 and a detection assembly 3, the scheme is provided with the operation assembly 4 through the hot-press device 1, after preliminary hot-press is performed on the cells, the battery core is further pre-pressed by the hot pressing component 2 and then is subjected to pressure adjustment, when the battery core is wound due to the ductility of the positive pole piece, the negative pole piece and the diaphragm, the thickness of the battery core is not uniformly dispersed, the thickness of the battery core can be uniformly dispersed and leveled by alternating hot pressing and pressure adjustment, the battery core is subjected to flatness detection by the detecting component 3 after the pressure adjustment is finished, the uneven area of the battery core can be subjected to pressure compensation and pressure adjustment by the feedback of the detecting component 3, the transmission of lithium ions is influenced and the internal resistance of the lithium battery is increased due to the blockage of micropores caused by the uneven thickness of the battery core, the change of the thick edge of the diaphragm can be relatively uniform by alternating hot pressing and pressure adjustment and the detection of the battery core, the flatness and consistency of the battery cells are improved, so that the thickness of the battery cells meets the requirements, the battery cells have higher consistency, and the battery cells are facilitated to be put into the shell.
Referring to fig. 3-4, the hot pressing assembly 2 includes a moving box 21, a pressing plate 5 is fixedly connected to the bottom end of the moving box 21, an L-shaped plate 18 is fixedly connected to the bottom end of the pressing plate 13, an electric push rod 19 is mounted on the L-shaped plate 18, an output end of the electric push rod 19 is fixedly connected to one end of the moving box 21, a servo motor 22 is mounted in the moving box 21, an output end of the servo motor 22 is fixedly connected to a half gear 23, a pair of mutually symmetrical toothed plates 24 are arranged on two sides of the half gear 23, and the half gear 23 is meshed with the toothed plates 24.
One end that keeps away from each other of a pair of pinion rack 24 is fixedly connected with first connecting plate 25 and second connecting plate 26 respectively, and bottom fixedly connected with a plurality of evenly distributed's first hot pressboard 29, and second connecting plate 26 bottom fixedly connected with a plurality of evenly distributed's second hot pressboard 30, first hot pressboard 29 and second hot pressboard 30 set up on same horizontal line, and first hot pressboard 29 and the mutual butt of second hot pressboard 30.
In the scheme, the toothed plates 24 arranged on two sides of the half gear 23 are meshed with the half gear 23, when the electric core is needed to be initially pressed, the electric core is placed on the operation plate 17, the whole pressing plate 5, the first hot pressing plate 29 and the second hot pressing plate 30 are started, heating rods arranged in the whole pressing plate 5, the first hot pressing plate 29 and the second hot pressing plate 30 are preheated, when the temperature is reached, the power switch of the hydraulic cylinder 15 is started, the movable plate 13 is driven to move up and down on the slide bar 12 through the output end of the hydraulic cylinder 15, the movable box 21 is synchronously driven to move down, in the downward moving process, the electric core is firstly contacted with the electric core on the operation plate 17 due to the large thickness of the whole pressing plate 5, so that the electric core is initially pressed to be heated and stressed, and the plurality of first hot pressing plates 29 and second hot pressing plates 30 are in suspended positions close to the electric core, the power switch of the electric push rod 19 is started, the movable box 21 is driven to move to the upper side of the electric core, the power switch of the servo motor 22 in the movable box 21 is started, the half gear 23 is driven to rotate through the output end of the servo motor 22, a pair of toothed plates 24 are made to reciprocate alternately, a plurality of first hot pressing plates 29 and a plurality of second hot pressing plates 30 are driven to complete the alternate hot pressing of the electric core, the power switch of the electric push rod 19 is started after the alternate hot pressing is finished, the whole pressing plate 5 is moved to the position right above the electric core, the electric core is subjected to whole pressing through the whole pressing plate 5, the stress of the electric core is dispersed better through the mode of the alternate hot pressing and the whole pressing, the thick edge change of the diaphragm of the electric core is more uniform, the thickness of the electric core meets the requirement and has higher consistency, after completion, the flatness of the battery cell can be detected through the detection assembly 3.
Referring to fig. 5-6, a limit groove 28 is formed in the moving case 21, a limit rod 27 is fixedly connected to the top end of the toothed plate 24, and the limit rod 27 is slidably connected with the limit groove 28. According to the scheme, the limiting groove 28 formed in the moving box 21 is in sliding connection with the limiting rod 27 fixedly connected with the top end of the toothed plate 24, so that the moving track of the pair of half gears 23 is limited through the sliding of the limiting rod 27 in the limiting groove 28, and the accuracy of the first hot pressing plate 29 and the second hot pressing plate 30 in hot pressing of the battery cells is improved.
The detection component 3 comprises a detection box 31, one end of the detection box 31 is fixedly connected with a movable box 21, an observation window 32 is arranged on the outer periphery of the detection box 31, a detection lamp 33 is arranged at the top end of an inner cavity of the detection box 31, a blocking plate 34 is arranged on the lower side of the detection lamp 33, the blocking plate 34 is fixedly connected with the inner wall of the detection box 31, a plurality of evenly distributed through holes are formed in the blocking plate 34, the observation window 32 is arranged on the outer periphery of the detection box 31, when flatness detection is required to be carried out on a battery cell after alternating hot-pressing and re-pressing, the detection component 3 is firstly moved to the upper side of the battery cell by starting an electric push rod 19, then a power switch of the detection lamp arranged in the inner top cavity of the detection box 31 is started, the light emitted by the detection lamp 33 irradiates the through hole formed in the blocking plate 34, and the blocking plate 34 is made of an opaque material, so that the emitted light is emitted into the protective cover 35 through the through hole, and then passes through the power switch of the starting 15, so that the detection box 31 is driven to move downwards to carry out flatness detection on the battery cell, when the detection box 31 is driven to move downwards by the starting 15, the thickness of the whole pressing plate 5 is larger, the whole pressing plate 5 is firstly contacted with the surface of the operation plate 17 in the downward moving process, so that the detection rods 36 are not contacted with the battery cell and are positioned in a region close to the battery cell, and the excessive impact deformation on the surface of the battery cell caused by overlong distance between the detection rods 36 and the battery cell in the downward sliding process is prevented.
The bottom end of the blocking plate 34 is fixedly connected with a protective cover 35 and a detection rod 36 which are matched with the number of the through holes, a convex mirror 37 is inlaid at the top end of the detection rod 36, an imaging table 38 is mounted in the inner cavity of the detection rod 36, an observation ring is inlaid outside the detection rod 36, and the observation ring and the imaging table 38 are arranged on the same horizontal line.
The outer periphery of the detection rod 36 is fixedly connected with a limiting ring 40, a limiting plate 39 is arranged on the upper side of the limiting ring 40, a plurality of sliding holes matched with the detection rod 36 are formed in the limiting plate 39, a plurality of evenly distributed electromagnets are embedded in the limiting plate 39, and the diameter of each sliding hole is larger than that of the detection rod 36.
The proposal is characterized in that the limit ring 40 is fixedly connected with the periphery of the detection rod 36, a plurality of evenly distributed electromagnets embedded on the limit plate 39 are in a starting state before detection, so that the electromagnets generate attractive force to the limit ring 40, the limit ring is used for fixing the plurality of detection rods 36, when a power switch of 15 is started, the detection box 31 is driven to move to one side of the battery core, the whole pressing plate 5 is abutted against the operation plate 17 while moving, the plurality of detection rods 36 are positioned at the upper side close to the battery core, the power switch of the electromagnets is disconnected, the plurality of detection rods 36 start to slide downwards to be abutted against the surface of the battery core under the action of gravity, the detection rods 36 are made of light materials, the impact degree is small when the detection rods are abutted against the surface of the battery core, the surface of the battery core has convex and concave surfaces when the battery core is uneven, when the plurality of detection rods 36 are abutted against the surface of the battery cell, the top ends of the plurality of detection rods 36 are uneven, and the thickness of the battery cell is usually in millimeter units, so that the focal length of the convex mirror 37 can be set to be between 0.1mm and 0.2mm, when more accurate data are needed, the focal length of the convex mirror 37 can be set to be smaller, when the detection rods 36 are abutted against the flat section of the battery cell, the distance from the convex mirror 37 to the detection lamp 33 is set to be twice the focal length of the convex mirror 37 by utilizing the principle of small-hole imaging, so that the light presents a light spot with normal size and soft brightness when the lamp light irradiates the imaging table 38, when the convex mirror 37 contacts with the concave surface of the battery cell, the distance from the convex mirror 37 to the detection lamp 33 is larger than twice the focal length of the convex mirror 37, so that the light spot presented by the imaging table 38 is darker, when the convex mirror 37 contacts with the convex surface of the battery cell, the distance from the convex mirror 37 to the detection lamp 33 is between the values that are larger than the first focal length of the convex mirror 37 and smaller than the second focal length of the convex mirror 37, so that larger and brighter light spots are displayed, the light spots can be observed by operators through the observation ring, the operators can observe the brightness of the light spots and the brightness of the light spots on the observation ring on the plurality of detection rods 36 inside through the observation window 32, the scale is carved on the outer surface of the protection cover 35, specific values of the concave surface and the convex surface of the battery core can be known, if the observation of the operators is inconvenient, a vision sensor and a high-definition camera are arranged in the detection box 31, the observation is performed, the concave surface and the convex surface of the battery core can be complemented according to detection data, and finally the voltage is regulated.
A hot pressing process of hot pressing shaping equipment of a lithium battery cell comprises the following steps:
s1: primary pressing; heating the battery cell and achieving a stress state through primary hot pressing;
s2: prepressing; the stress of the battery core is more dispersed through staggered hot pressing;
s3: carrying out pressure adjustment; the thickness of the battery cell is more uniform through the pressure adjustment;
s4: detecting; detecting the whole voltage battery cell through a detection assembly;
s5: pressure compensation; and correcting and compensating the unqualified area of the battery cell, and then rectifying the unqualified area of the battery cell.
After the power switch of the hydraulic cylinder 15 is started to primarily heat and press the battery core in the S1 and the S2, the power switch of the servo motor 22 is started to further pre-press the primarily heat and press the battery core, so that the thickness of the primarily heat and press battery core is more uniform.
And S4 and S5, after the voltage-regulated battery cell is detected by the detection component 3, the voltage-regulated battery cell can be regulated after the voltage-regulated battery cell is complemented to the uneven region of the battery cell according to the detection result of the detection component 3.
Working principle: when the electric core needs to be initially pressed, the electric core is placed on the operation plate 17, the whole pressing plate 5, the first hot pressing plate 29 and the second hot pressing plate 30 are started firstly, the heating rods arranged in the whole pressing plate 5, the first hot pressing plate 29 and the second hot pressing plate 30 are preheated, when the temperature is reached, the power switch of the hydraulic cylinder 15 is started, the output end of the hydraulic cylinder 15 drives the movable plate 13 to move up and down on the slide rod 12, the movable box 21 is synchronously driven to move down, in the downward moving process, the electric core is firstly contacted with the electric core on the operation plate 17 due to the large thickness of the whole pressing plate 5, so that the electric core is initially pressed, the electric core is heated and stressed, the plurality of first hot pressing plates 29 and the second hot pressing plates 30 are positioned in a suspending state and are close to the electric core, the electric core is conveniently and subsequently alternately pressed, the movable box 21 is driven to move to the upper side of the electric core through starting the power switch of the push rod 19, the power switch of the servo motor 22 in the movable box 21 is started, the half gear 23 is driven to rotate through the output end of the servo motor 22, so that a pair of toothed plates 24 alternately reciprocate, a plurality of first hot pressing plates 29 and a plurality of second hot pressing plates 30 are driven to finish alternate hot pressing of the electric core, the power switch of the electric push rod 19 is started after the alternate hot pressing is finished, the electric core is subjected to integral pressing through the integral pressing plate 5 by moving the integral pressing plate 5 right above the electric core, the stress of the electric core is more dispersed through the integral pressing plate 5 in a mode of alternate hot pressing and integral pressing, the thickness change of a diaphragm of the electric core is more uniform, the thickness of the electric core meets the requirement and has higher consistency, and when the electric core is detected, a plurality of evenly distributed electromagnets embedded on the limit plate 39 are in a starting state, so that the electromagnets generate attractive force to the limit ring 40, the device is used for fixing a plurality of detection rods 36, when a power switch of a hydraulic cylinder 15 is started, a detection box 31 is driven to move to one side of a battery core, the whole pressing plate 5 is abutted against an operation plate 17 while moving, so that the plurality of detection rods 36 are positioned at the upper side close to the battery core, the plurality of detection rods 36 start to slide downwards to be abutted against the surface of the battery core under the action of gravity by switching off the power switch of an electromagnet, the detection rods 36 are made of light materials, the impact degree is small when the detection rods 36 are abutted against the surface of the battery core, the surface of the battery core has convex surfaces and concave surfaces when the battery core is uneven, the top ends of the plurality of detection rods 36 are uneven when the plurality of detection rods 36 are abutted against the surface of the battery core, the distance from a convex mirror 37 to the detection lamp 33 is twice the focal length of the convex mirror 37 by using the principle of aperture imaging when the detection rods 36 are abutted against the flat section of the battery core, so that the light presents a light spot with normal size and soft brightness when the imaging table 38 is irradiated, when the convex mirror 37 is contacted with the concave surface of the battery cell, the distance from the convex mirror 37 to the detection lamp 33 is larger than twice the focal length of the convex mirror 37, so that the light spot presented by the imaging table 38 is smaller and darker, when the convex mirror 37 is contacted with the convex surface of the battery cell, the distance from the convex mirror 37 to the detection lamp 33 is between values larger than the focal length of the convex mirror 37 which is twice smaller than the focal length of the convex mirror 37, so that larger and brighter light spots are presented and can be observed by an operator through an observation ring, so that the operator can observe the size of the light spot brightness and the size of the light spot on the observation ring on the plurality of detection rods 36 inside through the observation window 32 as the basis for judging the flatness of the battery cell, and a scale is arranged on the outer surface of the protective cover 35, therefore, specific numerical values of the concave surface and the convex surface of the battery cell can be known, if the battery cell is inconvenient for staff to observe, a visual sensor and a high-definition camera can be arranged in the detection box 31, so that the battery cell is observed, the concave surface and the convex surface of the battery cell can be complemented according to detection data after detection is finished, and finally, the battery cell is subjected to pressure regulation.
The above description is only of the preferred embodiments of the present invention; the scope of the invention is not limited in this respect. Any person skilled in the art, within the technical scope of the present disclosure, may apply to the present invention, and the technical solution and the improvement thereof are all covered by the protection scope of the present invention.
Claims (10)
1. The hot-press shaping equipment for the lithium battery cell comprises hot-press equipment (1), and is characterized in that: the hot pressing equipment (1) one end fixedly connected with control box (11), install a plurality of control switch on control box (11), fixedly connected with a plurality of evenly distributed slide bars (12) on hot pressing equipment (1), and install operation board (17) on hot pressing equipment (1), install a pair of spacing in operation board (17), slide bar (12) top fixedly connected with roof (14), install pneumatic cylinder (15) on roof (14), pneumatic cylinder (15) output runs through roof (14) inner wall and extends to the inboard one end fixedly connected with movable plate (13) of roof (14), a plurality of evenly distributed slide holes and a plurality of slide bars (12) sliding connection of seting up on movable plate (13), movable plate (13) bottom side is provided with operation subassembly (4), operation subassembly (4) are including hot pressing subassembly (2) and detection subassembly (3).
2. The hot press shaping device of a lithium battery cell according to claim 1, wherein: the hot pressing assembly (2) comprises a moving box (21), a whole pressing plate (5) is fixedly connected to the bottom end of the moving box (21), an L-shaped plate (18) is fixedly connected to the bottom end of the moving plate (13), an electric push rod (19) is installed on the L-shaped plate (18), the output end of the electric push rod (19) is fixedly connected with one end of the moving box (21), a servo motor (22) is installed in the moving box (21), a half gear (23) is fixedly connected to the output end of the servo motor (22), a pair of mutually symmetrical toothed plates (24) are arranged on two sides of the half gear (23), and the half gear (23) is meshed with the toothed plates (24).
3. The hot press shaping device of a lithium battery cell according to claim 2, wherein: a pair of pinion rack (24) keep away from one end each other fixedly connected with first connecting plate (25) and second connecting plate (26) respectively, bottom fixedly connected with a plurality of evenly distributed's first hot pressboard (29), a plurality of evenly distributed's second hot pressboard (30) of second connecting plate (26) bottom fixedly connected with, first hot pressboard (29) and second hot pressboard (30) set up on same horizontal line, and first hot pressboard (29) and mutual butt of second hot pressboard (30).
4. The hot press shaping device of a lithium battery cell according to claim 2, wherein: the movable box (21) is provided with a limiting groove (28), the top end of the toothed plate (24) is fixedly connected with a limiting rod (27), and the limiting rod (27) is in sliding connection with the limiting groove (28).
5. The hot press shaping device of a lithium battery cell according to claim 1, wherein: the detection assembly (3) comprises a detection box (31), one end of the detection box (31) is fixedly connected with the movable box (21), an observation window (32) is arranged on the outer periphery of the detection box (31), a detection lamp (33) is arranged at the top end of an inner cavity of the detection box (31), a blocking plate (34) is arranged on the lower side of the detection lamp (33), the blocking plate (34) is fixedly connected with the inner wall of the detection box (31), and a plurality of evenly distributed through holes are formed in the blocking plate (34).
6. The hot press shaping device of a lithium battery cell according to claim 5, wherein: the anti-blocking device is characterized in that a protective cover (35) and a detection rod (36) which are matched with the number of the through holes are fixedly connected to the bottom end of the blocking plate (34), a convex mirror (37) is inlaid at the top end of the detection rod (36), an imaging table (38) is arranged in the inner cavity of the detection rod (36), an observation ring is inlaid outside the detection rod (36), and the observation ring and the imaging table (38) are arranged on the same horizontal line.
7. The hot press shaping device of a lithium battery cell as set forth in claim 6, wherein: the utility model discloses a measuring device, including measuring rod (36), fixed connection and limiting ring (40), limiting ring (40) upside is provided with limiting plate (39), a plurality of slide holes with measuring rod (36) assorted have been seted up on limiting plate (39), and inlay on limiting plate (39) and have a plurality of evenly distributed's electro-magnet, the diameter of slide hole is greater than measuring rod (36) diameter.
8. The hot pressing process of the hot pressing shaping equipment of the lithium battery cell according to claims 1-7, wherein the hot pressing process is characterized in that: the method comprises the following steps:
s1: primary pressing; heating the battery cell and achieving a stress state through primary hot pressing;
s2: prepressing; the stress of the battery core is more dispersed through staggered hot pressing;
s3: carrying out pressure adjustment; the thickness of the battery cell is more uniform through the pressure adjustment;
s4: detecting; detecting the whole voltage battery cell through a detection assembly;
s5: pressure compensation; and correcting and compensating the unqualified area of the battery cell, and then rectifying the unqualified area of the battery cell.
9. The hot pressing process of the hot pressing shaping equipment for the lithium battery cell according to claim 8, wherein the hot pressing process is characterized in that: after the power switch of the hydraulic cylinder (15) is started to carry out primary hot pressing on the battery core in the S1 and the S2, the power switch of the servo motor (22) is started to further pre-press the battery core after primary hot pressing, so that the thickness of the battery core is more uniform.
10. The hot pressing process of the hot pressing shaping equipment for the lithium battery cell according to claim 8, wherein the hot pressing process is characterized in that: after the voltage-regulated battery cell is detected by the detection component (3) in the S4 and the S5, the voltage-regulated area of the battery cell can be complemented according to the detection result of the detection component (3), and then the voltage-regulated area is regulated.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310263139.4A CN116247307B (en) | 2023-03-17 | 2023-03-17 | Hot-press shaping equipment and process for lithium battery cell |
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| CN202310263139.4A CN116247307B (en) | 2023-03-17 | 2023-03-17 | Hot-press shaping equipment and process for lithium battery cell |
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| CN116247307B CN116247307B (en) | 2023-09-19 |
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| CN116247307B (en) | 2023-09-19 |
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