CN115555222A - Spraying method and device and profiling insulating coating - Google Patents
Spraying method and device and profiling insulating coating Download PDFInfo
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- CN115555222A CN115555222A CN202211329681.7A CN202211329681A CN115555222A CN 115555222 A CN115555222 A CN 115555222A CN 202211329681 A CN202211329681 A CN 202211329681A CN 115555222 A CN115555222 A CN 115555222A
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- glue
- glue spraying
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- spraying head
- spraying
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/26—Processes for applying liquids or other fluent materials performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/027—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/12—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a coating with specific electrical properties
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
- H01B19/04—Treating the surfaces, e.g. applying coatings
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/147—Lids or covers
- H01M50/155—Lids or covers characterised by the material
- H01M50/164—Lids or covers characterised by the material having a layered structure
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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
Abstract
The application discloses a spraying method, a spraying device and a profiling insulating coating, wherein the spraying method comprises the following steps: respectively acquiring coordinate information of the functional area and the glue spraying head; controlling the glue spraying head to move so that the glue spraying head sprays the insulating paint on the top cover; and controlling the glue spraying head to close or open according to the coordinate information. According to the spraying method, the chemical bond combination among the insulating coatings is realized in a mode of spraying the insulating coatings, the obtained coating has higher stability after being cured, the problem of poor insulating effect caused by aging of an insulating film or an insulating sheet is avoided, and the insulating property of the battery is greatly improved; meanwhile, after coordinate information of the functional area and the glue spraying head is obtained, the distance between the functional area and the glue spraying head can be controlled, and the risk that the battery cell is invalid due to the fact that insulating paint is sprayed to the functional area in the spraying process is avoided.
Description
Technical Field
The application belongs to the technical field of battery surface insulation, and particularly relates to a spraying method and device and a profiling insulation coating.
Background
At present, insulation treatment is carried out on a square battery cell in a mode of wrapping an insulating film or pasting an insulating sheet; however, for a small-sized battery cell, the insulating film coated on the surface of the battery cell has the problems of wrinkles, bubbles, warping and the like, so that the yield of the battery cell is low; in addition, because functional areas such as utmost point post, explosion-proof valve are provided with on the electric core top cap usually, also make the shape of insulating film or insulating piece can not match the electric core top cap completely to cause electric core top cap position insulating effect poor, direct influence electric core performance.
Disclosure of Invention
The purpose of the invention is as follows: the application provides a spraying method, which solves the problem of poor effect of an insulating film or an insulating sheet by directly spraying an insulating coating on a top cover of a battery cell; another object of the present application is to provide a device for carrying out the above-mentioned spraying method; another object of the present application is to provide a profiled insulating coating prepared by the above spraying method.
The technical scheme is as follows: the application provides a spraying method for to battery spraying insulating layer, the battery includes the top cap, the top cap is equipped with the functional area, through set up the top of top cap and spout gluey head in order right top cap spraying insulating layer, the spraying method includes:
respectively acquiring coordinate information of the functional area and the glue spraying head;
controlling the glue spraying head to move so that the glue spraying head sprays insulating paint on the top cover;
and controlling the glue spraying head corresponding to the coordinate information of the functional area to be closed or opened according to the coordinate information of the functional area and the glue spraying head.
In some embodiments, before obtaining the coordinate information of the functional area and the glue spraying head respectively, the method further includes:
and constructing a coordinate system, wherein the coordinate system takes the length direction of the top cover as an x axis, the width direction of the top cover as a y axis, and the direction perpendicular to the surface of the top cover as a z axis, and the coordinate information of the functional area and the glue spraying head is defined by using the coordinate values of the x axis and the y axis.
In some embodiments, controlling the glue head to move to cause the glue head to spray the insulating paint on the top cover further comprises:
controlling the glue spraying head to move to one side of the top cover;
controlling the glue spraying head to move to an initial height along the direction of the z axis;
controlling the glue spraying head to move along the direction of the x axis so that the glue spraying head moves to the other side of the top cover;
and controlling the glue spraying head to move along the direction of the y axis, and then continuously controlling the glue spraying head to move along the direction of the x axis so as to enable the glue spraying head to return to one side of the top cover to finish spraying the top cover.
In some embodiments, according to the coordinate information of the functional area and the glue spraying head, controlling the glue spraying head corresponding to the coordinate information of the functional area to close or open, further comprising:
when the glue spraying head moves along the direction of the x axis, comparing the coordinate information of the glue spraying head and the coordinate information of the functional area; controlling the glue spraying heads with the distance from the functional area within a preset range and the glue spraying heads positioned in the functional area to be closed according to the comparison result of the coordinate information; and/or
And controlling the glue spraying head with the distance from the functional area to be outside the preset range to be opened.
In some embodiments, the present application also provides an apparatus for implementing the spray coating method, comprising:
the glue spraying mechanism comprises a main body part, the main body part comprises a plurality of groups of glue spraying units arranged along a first direction, and each glue spraying unit in the plurality of groups of glue spraying units comprises a plurality of glue spraying heads arranged along a second direction; the first direction and the second direction intersect;
the glue spraying head comprises a glue outlet, wherein the glue spraying head meets the following requirements: the ratio of (c-a)/b is more than or equal to 0.1 and less than or equal to 0.6, wherein, a represents the aperture of the glue outlet, b represents the glue spraying distance of the glue spraying head, and c represents the minimum distance between the adjacent glue spraying units.
In some embodiments, the glue-jet head further satisfies:
a is more than or equal to 0.05mm and less than or equal to 3.0mm; and/or
B is more than or equal to 2mm and less than or equal to 6mm; and/or
0.6mm≤c≤5.0mm。
In some embodiments, the glue-spraying heads are arranged along the same straight line in the second direction; and/or
The glue spraying units are arranged in a staggered mode in the first direction; and/or
The glue spraying heads are arranged at equal intervals along the second direction; and/or
The glue spraying units are arranged at equal intervals in the first direction.
In some embodiments, the glue jet head satisfies at least one of the following characteristics:
the glue output amount of the glue spraying head in each 0.1-0.3 s is 20-100 nL; and/or
The diameter of the glue drop sprayed by the glue spraying head after dropping is 0.5-1.0 mm.
In some embodiments, further comprising:
the bus bar is communicated with the glue spraying mechanism through a first pipeline;
the busbar is communicated with the glue supply tank through a second pipeline;
the glue supply pump is connected with the glue supply tank through the second pipeline;
the first pipeline comprises a plurality of sub-pipelines, and each sub-pipeline corresponds to the glue spraying head one to one.
In some embodiments, the present application also provides a profiled insulating coating prepared by the spray coating method.
Has the advantages that: compared with the prior art, the spraying method is used for spraying the insulating layer on the battery, the battery comprises the top cover, the top cover is provided with the functional area, the glue spraying head is arranged above the top cover to spray the insulating layer on the top cover, and the spraying method comprises the following steps: respectively acquiring coordinate information of the functional area and the glue spraying head; controlling the glue spraying head to move so that the glue spraying head sprays the insulating paint on the top cover; and controlling the glue spraying head corresponding to the coordinate information of the functional area to close or open according to the coordinate information of the functional area and the glue spraying head. According to the spraying method, the chemical bond combination among the insulating coatings is realized in a mode of spraying the insulating coatings, the obtained coating has higher stability after being cured, the problem of poor insulating effect caused by aging of an insulating film or an insulating sheet is avoided, and the insulating property of the battery is greatly improved; meanwhile, after coordinate information of the functional area and the glue spraying head is obtained, the distance between the functional area and the glue spraying head can be controlled, and the risk that the battery cell is invalid due to the fact that insulating paint is sprayed to the functional area in the spraying process is avoided.
The device for implementing the spraying method comprises a glue spraying mechanism, wherein the glue spraying mechanism comprises a main body part, the main body part comprises a plurality of groups of glue spraying units arranged along a first direction, and each glue spraying unit in the plurality of groups of glue spraying units comprises a plurality of glue spraying heads arranged along a second direction; the first direction and the second direction intersect; spout gluey head and including going out gluey hole, wherein, spout gluey head and satisfy: c-a/b is more than or equal to 0.1 and less than or equal to 0.6, wherein a represents the aperture of the glue hole, b represents the glue spraying distance of the glue spraying head, and c represents the minimum distance between the adjacent glue spraying units. When the glue spraying heads meet the relation, the situation that when one group of glue spraying heads are within a range of 2-4 mm away from the functional area, feed liquid sprayed by other still-working glue spraying heads cannot be sputtered onto the functional area can be guaranteed, a complete insulating coating structure can be formed, the processing technology of the glue spraying heads is simplified, and the overall insulating property of the battery is improved.
It can be understood that compared with the prior art, the profiling insulating coating provided by the embodiment of the application can have all the technical characteristics and beneficial effects of the spraying method, and the detailed description is omitted.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
FIG. 1 is a flow chart of a spray coating method provided herein;
fig. 2 is a schematic structural diagram of a glue spraying mechanism provided in the embodiment of the present application;
fig. 3 is a schematic cross-sectional structure diagram of a glue spraying mechanism provided in the embodiment of the present application;
FIG. 4 is an enlarged schematic view at A in FIG. 3;
fig. 5 is a schematic overall structure diagram of an apparatus for implementing a glue spraying method according to an embodiment of the present application;
fig. 6 is a schematic diagram of a battery structure provided in an embodiment of the present application;
the reference number is 10, the battery is arranged, the glue spraying mechanism is 20, the bus bar is 30, the first pipeline is 40, the glue supply tank is 50, the second pipeline is 60, the glue supply tank is 70, the profiling insulating coating is 80, the top cover is 100, the functional area is 101, the glue spraying head is 201, the main body part is 202, the glue spraying unit is 203, the sub-pipeline is 401, and the glue outlet is 2011.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise. Furthermore, the terms "first", "second" and "first" 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" or "second" may explicitly or implicitly include one or more features.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application.
For the insulation of the single battery cell, most of the single battery cells are insulated in a mode of wrapping an insulating film and pasting an insulating sheet, but bubbles are easy to appear in the pasting process of the insulating film, and metal particles and debris are inevitably mixed in the insulating film; the insulating and voltage-resisting performance of the insulating film is challenged; in addition, the small-size battery cell is insulated in an insulating film wrapping mode, the primary excellent rate in the production process is low, and a large amount of manpower and material resources are consumed for reworking the bad battery cell, so that waste is caused. In the package insulating film technology of electric core, the material cost of the paster that the top was used occupies 60% of the total material cost of package insulating film, what the insulating piece adopted is that polymer glue film and top aluminum hull bonded together to paste the top simultaneously, under the high temperature and high humidity's environmental condition, the glue film can age gradually, lose viscidity, consequently if can adopt the mode of spraying to carry out insulating spraying to electric core top equally, make insulating coating's the shape of similar top paster, can greatly reduced current package insulating film combine the cost of the scheme of pasting the insulating piece like this, the feasible of the leading-in volume production of electric core aluminum hull insulating spraying has been increased.
Referring to fig. 1, there is provided a spray coating method for spraying an insulating layer on a battery 10, including:
s11, respectively acquiring coordinate information of the functional area 101 and the glue spraying head 201;
s12, controlling the glue spraying head 201 to move so that the glue spraying head 201 sprays insulating paint on the top cover 100;
and S13, controlling the glue spraying head 201 corresponding to the coordinate information of the functional area 101 to close or open according to the coordinate information of the functional area 101 and the glue spraying head 201.
In some embodiments, by the spraying method, the insulating coating can be formed on the top cover 100 by spraying the insulating paint, and the insulating paint is chemically bonded, so that the insulating coating has high stability after being cured, the problem that the insulating effect is poor due to aging of the insulating film or the insulating sheet is solved, and the insulating performance of the battery can be greatly improved; meanwhile, after coordinate information of the functional area and the glue spraying head is obtained, the distance between the functional area and the glue spraying head can be controlled, and the risk that the battery cell is invalid due to the fact that insulating paint is sprayed to the functional area in the spraying process is avoided.
In some embodiments, before the step S11, before obtaining the coordinate information of the functional area 101 and the glue spraying head 201, further includes: a coordinate system is constructed, wherein the coordinate system takes the length direction of the top cover 100 as an x-axis, the width direction of the top cover 100 as a y-axis, and the direction perpendicular to the surface of the top cover 100 as a z-axis, and the coordinate information of the functional region 101 and the glue-spraying head 201 is defined by the coordinate values of the x-axis and the y-axis.
In some embodiments, in step S12, controlling the glue-spraying head 201 to move so that the glue-spraying head 201 sprays the insulating paint on the top cover 100, further includes: firstly, controlling the glue spraying head 201 to move to one side of the top cover 100; then the glue spraying head 201 is controlled to move to the initial height along the direction of the z axis; after the height is determined, controlling the glue spraying head 201 to move along the direction of the x axis so that the glue spraying head 201 moves to the other side of the top cover 100 to finish spraying a part of the surface of the top cover 100; and then controlling the glue spraying head 201 to move along the y-axis direction to avoid the sprayed area, and then continuously controlling the glue spraying head 201 to move along the x-axis direction to return the glue spraying head 201 to one side of the top cover 100 to spray other positions of the top cover 100 which are not sprayed, so as to control the glue spraying head 201 to move on the top cover 100 in a reciprocating manner, and thus, the spraying of the top cover 100 is completed. Through the movement control, the glue spraying head 201 can completely spray the surface of the top cover 100, and the spraying quality is ensured.
In some embodiments, in step S13, controlling the glue spraying head 201 corresponding to the coordinate information of the functional area 101 to be turned off or on according to the coordinate information of the functional area 101 and the glue spraying head 201, further includes: when the glue spraying head 201 moves along the direction of the x axis, comparing the coordinate information of the glue spraying head 201 and the functional area 101; controlling the glue spraying heads 201 with the distance from the functional area 101 within a preset range and the glue spraying heads positioned in the functional area 101 to be closed according to the comparison result of the coordinate information; and/or controlling the glue spraying head 201, the distance between which and the functional area 101 is beyond the preset range, to be opened. The specific process of comparing the coordinate information comprises the following steps: referring to xyz coordinate system of fig. 6, the coordinate information of the glue-spraying head 201 and the functional area 101 are determined in the coordinate system, and the coordinate of the vertex angle of the functional area 101 is (x) 1 ，y 1 0), the coordinates of the glue-spraying head 201 are (x) 2 ，y 2 ，z 2 )； z 2 The value of (d) is the initial height of the glue-spraying head 201, which can be expressed as the glue-spraying distance of the glue-spraying head 201; in the moving process of the glue spraying head 201, the coordinate (x) of the glue spraying head 201 2 ，y 2 ) Constantly changing, when the glue spraying head 201 is close to the functional area 101, the (x) is calculated 1 ，y 1 ) And (x) 2 ，y 2 ) The distance between the glue-spraying head 201 and the functional area 101 can be determined, so as to further determine whether the distance between the glue-spraying head 201 and the functional area 101 is within a preset range or whether the glue-spraying head 201 is completely located in the functional area 101. The preset range can be specifically 2-4 mm, after the control system acquires the coordinates of the glue spraying head 201 and the functional area 101, the distance between the glue spraying head 201 and the functional area 101 in the same coordinate system can be obtained according to the above calculation logic, when the distance between the glue spraying head 201 and the functional area 101 is in the range of 2-4 mm or the glue spraying head 201 completely moves into the functional area 101, the glue spraying head 201 is controlled to stop working, and the phenomenon that the sprayed insulating material is sputtered onto the functional area 101 to cause the failure of the battery cell is avoided; when the distance between the glue spraying head 201 and the functional area 101 exceeds the range of 2-4 mm, the glue spraying head is recovered to work, and the top cover 100 is sprayed。
In some embodiments, before the above spraying method is performed, it is necessary to provide the battery 10 and the spraying device separately, referring to fig. 5 and fig. 6, the battery 10 is an aluminum-shell prismatic battery, the battery 10 includes a top cover 100, a functional region 101 is provided on a surface of the top cover 100, and the functional region 101 is a region for implementing some functions of the battery, such as a cell pole for electrical connection, such as an explosion-proof valve for protecting the battery, or such as a two-dimensional code for identifying the battery. Meanwhile, a glue spray head 201 for spraying is provided above the top cover 100.
In some embodiments, battery 10 further includes a housing having five surfaces, including two large faces, two side faces, and a bottom face; before the top cover 100 is sprayed, five surfaces of the battery may be subjected to insulation treatment, and the insulation treatment may be performed by coating an insulation film or by using a process of spraying an insulation material. For example, first, two sides of the battery 10 are clamped and positioned, and two large surfaces are sprayed, the clamp cannot block any part of the large surfaces, and according to the method, five surfaces are sprayed with insulating materials, and after spraying, the insulating materials are cured to obtain an insulating coating.
In some embodiments, before the battery 10 is subjected to the insulation treatment, the battery 10 needs to be cleaned, some pollutants are inevitably introduced into the battery cell during the actual production process, and the surface of the square aluminum-shell battery cell to be sprayed needs to be cleaned, where the surface cleaning is to remove some oil stains and dust particles on the oxidation level of the battery cell surface, and plasma cleaning and laser cleaning may be considered. For example, the ion cleaning is to generate plasma by using high frequency voltage, and to provide high energy to the contaminants on the surface of the cell, and the contaminants absorb the energy to become volatile small molecules, so as to achieve the purpose of cleaning, and the power of the plasma cleaning is preferably 800-2000w, and the cleaning time is preferably 20-60 s. The laser cleaning is to perform epidermis reconstruction on the surface of the shell by using point equidistant laser, the laser cleaning depth is 3-6um, the influence on the shell is small, an oxide layer and dirt on the surface of the shell can be effectively removed, and the spraying binding force is effectively improved. The power of the point laser is 10-120W, the power of the laser equipment is 2-10 kW, the cleaning effect is poor due to too low power, the shell loss is easily excessive due to too high power, the preferred laser power is 30-90W, and the equipment power is 3-5 kW; it will be appreciated that the laser cleaning process can produce a large amount of housing debris that reattaches to the housing surface resulting in spray bumps and poor insulation. Therefore, the laser cleaning process needs to keep negative pressure for dust removal all the time, the distance between a negative pressure port and a workpiece is preferably 10-100 mm, and the air speed of the negative pressure port is 20-80 m/s.
In some embodiments, the sprayed insulation material comprises a host material such as an oil-based insulation resin or an aqueous insulation resin. The insulating resin main body material comprises epoxy resin, acrylic resin, polyurethane resin, hydroxyl acrylic resin and other polyfunctional resin; various adjuvants may also be included in the insulation material, such as photoinitiators, reactive diluents, flame retardants, wetting agents, leveling agents, defoamers, and the like. The main material and the auxiliary agent are prepared into the large insulating material for spraying according to a certain proportion. It can be understood that, in order to avoid the situation that the material is fast cast when being sprayed on the surface of the shell, the spraying material is prepared into liquid with certain viscosity, the viscosity range is mainly 2000-12000 cps, and the specific viscosity ranges of different materials are adjusted correspondingly.
In some embodiments, after the liquid or semi-solid insulation material is sprayed on the surface of the battery case, the liquid or semi-solid insulation material needs to be cured to form a film, and the curing scheme is different according to different selection modes of the curing principle of the material. The common curing methods include high temperature curing, photo-curing, etc., and materials for curing, such as UV glue, etc., also need to be added into the insulating material.
In some embodiments, the thickness of the insulating coating is 0.2-0.5 mm, and the coating is too thin, which easily causes local missing coating failure, and too thick which affects module assembly and increases material cost.
In some embodiments, the high temperature curing is to use high temperature to accelerate the volatilization of solvent and small molecules in the coating to dry into a film. It can be understood that the curing temperature is not too high for the finished battery, the electrolyte is decomposed due to the too high temperature, the preferable temperature is 20-60 ℃, and the surface drying time of the coating is 10-40 min. The light curing is to carry out ultraviolet irradiation on the UV glue coating, and the molecules in the coating can be polymerized under the ultraviolet irradiationAnd crosslinking reaction, and fast curing to form the film. Preferably, the wavelength of the ultraviolet light is 300-450 nm, and the light intensity is 6000-12000 mw/cm 2 The irradiation distance is 10-30mm, and the curing time is 3-10 s.
Referring to fig. 5, there is provided an apparatus for implementing the above-described spray coating method, the apparatus including a glue spraying mechanism 20, a bus bar 30, a first pipe 40, a glue supply tank 50, a second pipe 60, and a glue supply pump 70; the bus bar 30 is communicated with the glue spraying mechanism 20 through a first pipeline 40; the bus bar 30 is communicated with the glue supply tank 50 through a second pipeline 60; the glue supply pump 70, the glue supply pump 70 is connected with the glue supply tank 50 through the second pipe 60. In some embodiments, further referring to fig. 2, the first pipe 40 includes a plurality of sub-pipes 401, and each sub-pipe 401 corresponds to one of the glue-spraying heads 201, so as to ensure that each glue-spraying head 201 can work independently.
In some embodiments, referring to fig. 2-4, a glue dispensing mechanism comprises: the main body part 202, the main body part 202 includes a plurality of glue spraying units 203 arranged along a first direction, each glue spraying unit 203 in the glue spraying units 203 includes a plurality of glue spraying heads 201 arranged along a second direction; the first direction and the second direction intersect; spout gluey head 201 and include out gluey hole 2011, wherein, spout gluey head 201 and satisfy: c-a/b is more than or equal to 0.1 and less than or equal to 0.6, wherein a represents the aperture of the glue hole 2011, b represents the glue spraying distance of the glue spraying head 201, and c represents the minimum distance between the adjacent glue spraying units 203.
In some embodiments, in the actual glue spraying process, even after the glue spraying heads 201 within the preset range of 2-4 mm from the functional area are closed, glue droplets sprayed by other still-operating glue spraying heads 201 are easy to splash onto the functional area, so the glue spraying heads 201 in the glue spraying mechanism 20 need to be further designed to avoid the above problems. Through the arrangement, the glue spraying heads 201 can be combined to form an array structure with a certain area range, so that the glue spraying heads 201 can spray a layer of continuous coating with a certain width on the top cover 100 of the battery, and the width of the specific area range can be determined according to the size of the array; when the glue spraying head 201 meets the above relationship, it can be ensured that when the glue spraying head 201 is 2-4 mm away from the functional area, the feed liquid sprayed by the glue spraying head 201 in other works cannot be sputtered onto the functional area 101, and a continuous insulating coating with uniform thickness can be obtained in other areas of the top cover 100, so that a complete insulating layer structure can be ensured, the processing technology of the glue spraying head 201 can be simplified, and the overall insulating property of the surface of the battery cell can be improved.
In some embodiments, taking fig. 3 as an example, the horizontal arrows indicate a first direction, the vertical arrows indicate a second direction, and the first direction and the second direction intersect; in each group of the glue spraying units 203, the glue spraying heads 201 are arranged along the second direction, and actually, the arrangement of the glue spraying heads 201 in the second direction is random, so long as the glue spraying heads 201 are arranged along a trend extending along the second direction; on this basis, the arrangement of the glue spraying units 203 composed of the glue spraying heads 201 in the first direction is also random, as long as the glue spraying units 203 are arranged along the trend of extending in the first direction, therefore, through the arrangement mode, the glue outlet 2011 can form an array structure on the cross section of the main body portion 202, and the shape of the array is determined by the arrangement mode of the glue spraying heads 201, but for the convenience of processing and preparation of the glue spraying heads 201, the intersecting mode of the first direction and the second direction is generally limited to be vertical, so that the shape of the array is ensured to be approximately rectangular, and the glue spraying mechanism is favorable for improving the matching with the shape of the cell top cover assembly 8 when spraying the top cover 100, reducing the spraying times and improving the spraying quality.
The purpose of defining the first direction and the second direction in this application is to describe and clarify the arrangement of the glue spraying heads 201, the first direction and the second direction are two opposite transverse and longitudinal directions, and the glue spraying heads 201 are arranged according to the orientations of the first direction and the second direction to form a certain area region. That is, whether the glue-spraying heads 201 are arranged in a regular manner in multiple rows and multiple columns or in an irregular manner, all of them are within the scope of the present application.
In some embodiments, further reference is made to fig. 4, which is an enlarged schematic view at a in fig. 3; the glue outlet 2011 is circular, and a is the diameter of the glue outlet 2011. Usually, the glue spraying head 201 has a certain wall thickness, and the glue outlet 2011 only has the size of the inner diameter of the hole at the glue outlet position at the end part of the glue spraying head 201. c may be specifically the minimum distance between the glue-spraying heads 201 of different glue-spraying units 203, and the distance is only the distance between the outer surfaces of the glue-spraying heads 201; in some other embodiments, c may also be the minimum distance between adjacent glue-spraying heads 201 in a group of glue-spraying units 203. Further referring to fig. 5, b shows the glue spraying distance of the glue spraying head 201, and the glue spraying mechanism is located above the top cover 100 in the actual glue spraying process, so that b is the distance between each glue outlet 2011 and the top cover 100, the glue outlet amount of the glue spraying head 201 can be ensured by limiting the size a, the sputtering degree of the sprayed glue drops can be controlled by limiting the sizes b and c, and when the sizes of the three are within a reasonable range, the condition that the sprayed glue drops are sputtered to the functional area can be avoided.
In some embodiments, the glue jet 201 further satisfies: a is more than or equal to 0.05mm and less than or equal to 3.0mm; b is more than or equal to 2mm and less than or equal to 6mm; c is more than or equal to 0.6mm and less than or equal to 5.0mm. In some embodiments, a can be any one of 0.05mm, 0.1mm, 0.5mm, 1.0mm, 1.5mm, 2.0mm, 2.5mm, and 3.0mm or a range between any two values; it is to be noted that the specific value of a is given by way of example only, as long as any value or range of values between any two values within the range of 0.05 to 3.0mm is within the scope of the present application. In some embodiments, the value of b may be any one of 2mm, 3mm, 4mm, 5mm, and 6mm or a range between any two values; it is to be noted that the specific value of b is given by way of example only, as long as any value or range of values between any two values within the range of 2 to 4mm is within the scope of the present application. In some embodiments, the value of c may be any one of 0.6mm, 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm, 4.5mm, and 5.0mm or a range between any two values; it is to be noted that the specific value of c is given by way of example only, as long as any value or range of values between any two values within the range of 0.6 to 1.5mm is within the scope of the present application.
In some embodiments, the glue-spraying heads 201 are arranged along the same straight line in the second direction; when the glue spraying heads 201 are positioned on the same straight line, it can be ensured that glue drops sprayed by one group of glue spraying units 203 are also linear on the top cover 100, so that the uniformity of the thickness of the insulating layer is ensured in the multiple spraying processes.
In some embodiments, any two adjacent sets of the glue spraying units 203 may be arranged in a staggered manner in the first direction, specifically referring to fig. 2, after the glue spraying units 203 are arranged in a staggered manner, the glue spraying heads 201 in the first and second rows of the glue spraying units 203 located at the leftmost side are also arranged in a staggered manner in the first direction, further referring to fig. 3, since the glue outlet 2011 is circular, the circles of the glue drops sprayed from the glue outlet in the same row after the top cover 100 is spread are intersected or tangent, and after the glue spraying heads 201 in the second row are arranged in a staggered manner, the area that cannot be covered by the first row of the glue spraying units 203 due to the intersection or tangent of the glue drops can be filled, so as to ensure the spraying integrity of the top cover 100.
In some embodiments, each group of the glue spraying units 203 has the same number of glue spraying heads 201, so as to ensure that the glue spraying heads 201 are sequentially and correspondingly arranged in the first direction; in some embodiments, the glue jets 201 are equally spaced along the second direction. Or the glue spraying units 203 are arranged at equal intervals in the first direction to ensure that the correspondingly arranged glue spraying heads 201 are also arranged at equal intervals in the first direction, so that the spraying uniformity can be further improved through the arrangement at equal intervals, and the size of the insulating layer for spraying can be conveniently controlled. The method can also be as follows: the glue spraying units 203 are equally spaced in the first direction, and the glue spraying heads 201 are also equally spaced in the second direction, that is, the distance between any two adjacent glue spraying heads 201 is equal.
In some embodiments, the glue spraying distances of the plurality of glue spraying heads 201 are kept consistent, that is, the glue spraying distances b of any glue spraying head 201 are equal in size, so that it can be ensured that glue drops can be dropped on the top cover 100 at the same time, and the subsequent coating curing process can be further simplified.
In some embodiments, the glue jet 201 satisfies at least one of the following characteristics: the glue output of the glue spraying head 201 is 20-100 nL within each 0.1-0.3 s; and/or the diameter of the glue drop sprayed by the glue spraying head 201 after dropping is 0.5-1.0 mm.
In some embodiments, the amount of gum run-out may be any one of 20nL, 30nL, 40nL, 50nL, 60nL, 70nL, 80nL, 90nL, and 100nL, or a range of values between any two values; the diameter of the glue drop after dropping can be any one of 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm and 1.0mmL or a range value between any two values; through the size restriction after to the volume of going out to glue or glue dripping, can further improve the spraying quality, avoid gluing the dripping and spattering to functional area 101.
In some embodiments, the specific working process of the glue spraying device is as follows: firstly, a glue spraying device is arranged according to the structure of fig. 5, and the glue supply tank 50 is provided with insulating glue. Alternatively, the insulating glue includes a mixture of an aqueous or oily insulating resin and UV glue, and the glue supply pump 70 is turned on to deliver the mixture to the bus bar 30 through the second pipe 60, and then the bus bar 30 delivers the mixture to the glue-spraying heads 201 through the sub-pipes 401, respectively, so that the glue-spraying heads 201 can spray glue.
In some embodiments, referring to fig. 3, each glue spraying mechanism includes 8 groups of glue spraying units 203, and 8 groups of glue spraying units 203 are staggered in the first direction at equal intervals; each group of glue spraying units 203 comprises 15 glue spraying heads, wherein the 15 glue spraying heads are positioned on the same straight line in the second direction and are arranged at equal intervals, a is controlled to be 0.10mm, b is controlled to be 3mm, c is controlled to be 0.8mm, and namely (c-a)/b is approximately equal to 0.23; meanwhile, the glue discharging amount of a single glue spraying head 201 is controlled to be 50nL, and one glue drop is discharged every 0.2s, so that the diameter of the glue drop after dropping is within 0.7-0.8 mm. Referring to fig. 4, moving the cleaned battery cell upper clamp to a position below the glue spraying mechanism, and controlling the glue spraying distance b to be 3mm; referring to fig. 5, the top cover 100 includes a plurality of functional areas 101, such as poles, explosion-proof valves, and two-dimensional cell identifiers.
In some embodiments, the specific spraying process is:
the insulating paint is prepared, for example, the aqueous insulating resin spraying material is provided, and the formulation comprises 25 parts of aqueous hydroxyl acrylic emulsion, 15 parts of polyurethane dispersoid, 0.5 part of defoaming agent, 0.2 part of leveling agent, 0.4 part of catalyst, 50 parts of curing agent and 20 parts of solvent. The components are added into a dispersion tank in sequence according to the weight and the sequence for even stirring, the stirring speed is 400-700 r/min, 500-550 r/min is the best, no gas exists in a barrel which is generally required to be filled with glue solution, the tank is in a vacuum state, the process is simple, all the components are added, the stirring is even, and the obtained resin solution can be sprayed by adding into a glue supply tank 50.
Then clamping and fixing the battery 10, so that the glue spraying mechanism 20 is positioned above the top cover 100, the plane where the glue outlet 2011 of the glue spraying head 201 is positioned is parallel to the upper surface of the top cover 100, when the battery 10 is placed in a clamp, the clamp clamps to fix the position of the battery 10, and at the moment, the position coordinate information of the battery and the coordinate information of the shape and the size of the functional area 101 on the top cover 100 are also input into the PLC control system;
when the glue spraying head 201 is restored to the initial position, the position of the glue spraying head 201 is also fixed, and the coordinate position information of the glue spraying head is input into the PLC control system; meanwhile, setting a range which is 3mm away from the functional area as a preset range;
the PLC control system further moves the glue spraying head 201, whether the glue spraying head 201 corresponds to a preset range or a function area is judged according to comparison of coordinate information of the glue spraying head 201 and the function area 101, when the projection of the first row of glue spraying heads 201 on the top cover 100 is located in the preset range, the PLC system controls the glue spraying head 201 to close glue discharging, and along with continuous movement of the glue spraying heads, when the glue spraying heads move to a position over against the function area 101, the PLC system also controls the glue spraying head 201 to close glue discharging; in this control mode, when the projection of the second row on the top cover 100 is in the preset range, the PLC system receives information to control the glue-spraying heads to close until all the glue-spraying heads 201 pass through the functional area 101;
when the glue spraying heads 201 in the first row are far away from the functional area 101 and move out of the preset range, the PLC system controls the glue spraying heads 201 to be opened and glue is discharged again, and all the glue spraying heads 201 in the following are controlled in the same mode; when the glue-spraying head 201 passes through the top cover 100, a layer of profiling insulating coating 80 with uniform thickness is sprayed on the top cover 100.
In some embodiments, the insulation material is further cured after spraying, and optionally cured by ultraviolet light having a wavelength of 400nm and a light intensity of 10000mw/cm 2 The irradiation distance is 20mm, the curing time is about 8s, and the coating is generally sprayedThe total thickness of the profiling insulating coating 80 is 0.2 mm-0.5 mm, and the requirement of insulation and voltage resistance of a common battery core can be met.
The spraying method, the spraying device and the profiling insulating coating provided by the embodiment of the application are described in detail, the principle and the implementation mode of the application are explained by applying specific examples, and the description of the embodiment is only used for helping to understand the technical scheme and the core idea of the application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (10)
1. A spray coating method for spray coating an insulating layer on a battery (10), wherein the battery (10) comprises a top cover (100), the top cover (100) is provided with a functional area (101), and the top cover (100) is coated with the insulating layer by arranging a glue spray head (201) above the top cover (100), the spray coating method comprising:
coordinate information of the functional area (101) and the glue spraying head (201) is obtained respectively;
controlling the glue spraying head (201) to move so that the glue spraying head (201) sprays insulating paint on the top cover (100);
and controlling the glue spraying head (201) corresponding to the coordinate information of the functional area (101) to be closed or opened according to the coordinate information of the functional area (101) and the glue spraying head (201).
2. A method as claimed in claim 1, wherein before obtaining the coordinate information of the functional area (101) and the glue-spraying head (201), respectively, further comprising:
and constructing a coordinate system, wherein the coordinate system takes the length direction of the top cover (100) as an x axis, the width direction of the top cover (100) as a y axis and the direction vertical to the surface of the top cover (100) as a z axis, and the coordinate information of the functional area (101) and the glue spraying head (201) is defined by using the coordinate values of the x axis and the y axis.
3. A method according to claim 2, wherein the glue head (201) is controlled to move so that the glue head (201) sprays the insulating paint on the top cover (100), further comprising:
controlling the glue spraying head (201) to move to one side of the top cover (100);
controlling the glue spraying head (201) to move to an initial height along the direction of the z axis;
controlling the glue spraying head (201) to move along the direction of the x axis so that the glue spraying head (201) moves to the other side of the top cover (100);
and controlling the glue spraying head (201) to move along the direction of the y axis, and then continuously controlling the glue spraying head (201) to move along the direction of the x axis so as to enable the glue spraying head (201) to return to one side of the top cover (100) to finish spraying the top cover (100).
4. A spraying method according to claim 3, wherein the step of controlling the glue-spraying head (201) corresponding to the coordinate information of the functional area (101) to be closed or opened according to the coordinate information of the functional area (101) and the glue-spraying head (201) further comprises the steps of:
when the glue spraying head (201) moves along the direction of the x axis, comparing the coordinate information of the glue spraying head (201) and the functional area (101); controlling the glue spraying heads (201) with the distance to the functional area (101) within a preset range and the glue spraying heads positioned in the functional area (101) to be closed according to the comparison result of the coordinate information; and/or
And controlling the glue spraying head (201) which is away from the functional area (101) within a preset range to be opened.
5. An apparatus for carrying out the spraying method according to any one of claims 1 to 4, comprising:
the glue spraying mechanism (20), the glue spraying mechanism (20) comprises a main body part (202), the main body part (202) comprises a plurality of groups of glue spraying units (203) which are arranged along a first direction, and each glue spraying unit (203) in the plurality of groups of glue spraying units (203) comprises a plurality of glue spraying heads (201) which are arranged along a second direction; the first direction and the second direction intersect;
spout gluey head (201) including going out gluey hole (2011), wherein, spout gluey head (201) and satisfy: 0.1 ≦ (c-a)/b ≦ 0.6, wherein a represents the aperture of the glue outlet (2011), b represents the glue spraying distance of the glue spraying head (201), and c represents the minimum distance between the adjacent glue spraying units (203).
6. The device according to claim 5, characterized in that the glue-spraying head (201) further satisfies:
a is more than or equal to 0.05mm and less than or equal to 3.0mm; and/or
B is more than or equal to 2mm and less than or equal to 6mm; and/or
0.6mm≤c≤5.0mm。
7. The device according to claim 5, characterized in that the glue-spraying heads (201) are arranged along a same straight line in the second direction; and/or
The glue spraying units (203) are arranged in a staggered mode in the first direction; and/or
The glue spraying heads (201) are arranged at equal intervals along the second direction; and/or
The glue spraying units (203) are arranged at equal intervals in the first direction.
8. The device according to claim 5, characterized in that the glue-jet head (201) satisfies at least one of the following characteristics:
the glue output amount of the glue spraying head (201) within each 0.1-0.3 s is 20-100 nL; and/or
The diameter of the glue drop sprayed by the glue spraying head (201) after dropping is 0.5-1.0 mm.
9. The apparatus of claim 5, further comprising:
the bus bar (30), the bus bar (30) and the glue spraying mechanism (20) are communicated through a first pipeline (40);
the glue supply tank (50), the bus bar (30) and the glue supply tank (50) are communicated through a second pipeline (60);
the glue supply pump (70), the glue supply pump (70) is connected with the glue supply tank (50) through the second pipeline (60);
the first pipeline (40) comprises a plurality of sub-pipelines (401), and each sub-pipeline (401) corresponds to the glue spraying head (201) one by one.
10. Profiled insulating coating, characterized in that it (80) is obtained by a spraying process according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211329681.7A CN115555222A (en) | 2022-10-27 | 2022-10-27 | Spraying method and device and profiling insulating coating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211329681.7A CN115555222A (en) | 2022-10-27 | 2022-10-27 | Spraying method and device and profiling insulating coating |
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| CN115555222A true CN115555222A (en) | 2023-01-03 |
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| CN202211329681.7A Pending CN115555222A (en) | 2022-10-27 | 2022-10-27 | Spraying method and device and profiling insulating coating |
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| CN117594858B (en) * | 2024-01-17 | 2024-04-19 | 深圳市铭镭激光设备有限公司 | Automatic assembly production line and assembly method for energy storage battery |
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Address after: 518107 1-2 Floor, Building A, Xinwangda Industrial Park, No. 18 Tangjianan Road, Gongming Street, Guangming New District, Shenzhen City, Guangdong Province Applicant after: Xinwangda Power Technology Co.,Ltd. Address before: 518107 1-2 Floor, Building A, Xinwangda Industrial Park, No. 18 Tangjianan Road, Gongming Street, Guangming New District, Shenzhen City, Guangdong Province Applicant before: SUNWODA ELECTRIC VEHICLE BATTERY Co.,Ltd. |