CN111430809A - Dispensing device and lithium ion battery production method adopting same - Google Patents
Dispensing device and lithium ion battery production method adopting same Download PDFInfo
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- CN111430809A CN111430809A CN202010215605.8A CN202010215605A CN111430809A CN 111430809 A CN111430809 A CN 111430809A CN 202010215605 A CN202010215605 A CN 202010215605A CN 111430809 A CN111430809 A CN 111430809A
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- dispensing
- heating chamber
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0404—Machines for assembling 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
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention belongs to the technical field of lithium ion batteries, and particularly relates to a dispensing device which comprises a dispensing tank with a dispensing outlet, wherein the dispensing tank is sequentially provided with a colloidal particle storage chamber, a heat insulation pad and a heating chamber which are communicated with each other from top to bottom, the dispensing outlet is communicated with the heating chamber, and the temperature of the heating chamber is controlled to be 50-60 ℃. In addition, the invention also provides a lithium ion battery production method adopting the dispensing device, which comprises the following steps: s1, uniformly spot-coating slightly hot-melt colloidal particles on the aluminum foil on the wide surface of the cell body; s2, packaging the battery cell body by the aluminum plastic film; s3, carrying out hot pressing on the packaged battery cell to form, and compressing and bonding the aluminum plastic film, the colloidal particles and the aluminum foil together at high temperature; and S4, taking out the battery cell and cooling. Compared with the prior art, the colloidal particles can not flow around on the surface of the bare cell, and can form a colloidal particle structure with good thickness consistency and uniform distribution on the surface of the bare cell, thereby being beneficial to reducing the safety risk caused by the falling of the battery.
Description
Technical Field
The invention belongs to the technical field of lithium ion batteries, and particularly relates to a dispensing device and a lithium ion battery production method adopting the dispensing device.
Background
The lithium ion battery has the advantages of high energy density, long cycle service life, no memory, small pollution and the like, so that the lithium ion battery is widely applied to equipment such as mobile phones, notebook computers, charge pal and the like. While the lithium ion battery is widely used, various problems are accompanied, and the battery falls to cause fire or even explosion, so that the fire or the explosion can be started first, and how to fix the position of the bare cell in the battery assembly is very important.
At present, most of the used processes are to paste double-sided hot melt adhesive between an aluminum plastic film and an aluminum foil, and although the processes are mature and simple, the existing safety risks of the processes are already exposed, and the processes specifically comprise: 1) the bare cell and the aluminum plastic film are respectively excessively concentrated with the bonding stress surface of the hot-melt double-sided adhesive, under the environment that the battery is made more and more heavy, the structure enables the battery to easily cause uneven stress when the battery falls, and the bare cell and the aluminum plastic film are easily subjected to relative displacement, so that the aluminum foil on the outer layer of the bare cell is torn, and the problems of short circuit, diaphragm turnover, tab fracture, aluminum plastic film damage and the like in the battery are further caused; 2) the hot-melt double-sided adhesive tape is usually softer, so that the adhesive tape is easily wrinkled during adhesive tape pasting, and the adhesive tape pasting quality and the adhesive tape pasting efficiency are affected; 3) the existing winding equipment cannot paste large-area hot melt adhesive and only can paste the hot melt adhesive manually, so that the labor cost is increased; 4) the hot melt adhesive can swell, degum and the like after being soaked in the electrolyte for a long time, and seriously and completely lose viscosity, thereby influencing the use stability of the battery.
In order to solve the problem of sticking double-sided hot melt adhesive, a glue spraying process is developed, glue is sprayed on the surface of a bare cell to form a bonding body through cooling, and then processes such as packaging, hot-pressing formation and the like are carried out.
Disclosure of Invention
One of the objects of the present invention is: to prior art's not enough, and provide a dispensing device, simple structure, its exhaust micelle can not flow everywhere and scurries on naked electric core surface, can form the good and even micelle structure that distributes of thickness uniformity on naked electric core surface, is favorable to reducing because of the battery falls the safe risk that leads to.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a dispensing device, is including being provided with out the some jar of gluing of jiao kou, some jar of gluing has set gradually micelle apotheca, heat insulating mattress and the heating chamber of mutual intercommunication by last to down, go out jiao kou with the heating chamber intercommunication, the temperature control of heating chamber is at 50 ~ 60 ℃.
As an improvement of the dispensing device, the diameter of the glue outlet is 1-3 mm.
As an improvement of the dispensing device, the heat insulation pad is provided with a channel through which the glue particles can pass, and the diameter of the channel is 1.5-2 mm.
As an improvement of the dispensing device, the channel is vertically arranged or obliquely arranged.
As an improvement of the dispensing device, the thickness of the heat insulation pad is 5-20 mm.
As an improvement of the dispensing device, the heating chamber is provided with a heating element, and the heating temperature of the heating element is 50-60 ℃.
As an improvement of the dispensing device, the outer wall of the heating chamber is provided with a heat-insulating layer.
The improved dispensing device further comprises a clamping piece, and the clamping piece is connected with the dispensing tank.
The dispensing device further comprises a P L C controller, wherein the P L C controller is connected with the clamping member and the heating member and is used for controlling the moving path of the clamping member and the heating temperature of the heating member.
The second purpose of the invention is: the production method of the lithium ion battery adopting the dispensing device comprises the following steps:
s1, dispensing, namely uniformly dispensing slightly hot-melt adhesive particles on the aluminum foil on the wide surface of the cell body;
s2, packaging, namely packaging the battery cell body in the step S1 by an aluminum plastic film;
s3, carrying out hot pressing formation, namely carrying out hot pressing formation on the battery cell packaged in the step S2, and pressing and bonding the aluminum plastic film, the colloidal particles and the aluminum foil together at high temperature;
and S4, cooling, namely taking out the battery cell in the step S3 and cooling.
Compared with the prior art, the invention at least has the following beneficial effects:
1) the glue dispensing tank of the glue dispensing device is sequentially provided with the colloidal particle storage chamber, the heat insulation pad and the heating chamber from top to bottom, namely the heat insulation pad is arranged in the traditional storage tank, the heating element is arranged at the lower half part of the traditional storage tank, and the structure is simple.
2) The dispensing device controls the temperature of the heating chamber to be 50-60 ℃, so that colloidal particles entering the heating chamber from the colloidal particle storage chamber through the heat insulation pad are changed from a non-initial-adhesion state to a weaker hot-melting state, when the dispensing device is dispensed on the surface of a bare cell, the dispensing device has certain adhesion and does not generate the problem of glue flowing around, the problem of damage to a diaphragm and a foil caused by overhigh temperature is avoided, a colloidal particle structure with good consistency and uniform distribution can be formed on the surface of the bare cell, and the safety risk caused by the falling of a battery is favorably reduced.
3) The glue dispensing device disclosed by the invention is used for dispensing glue, so that the problems of wrinkling and labor cost caused by pasting a large area of hot melt glue during the gluing of the traditional hot melt glue can be avoided.
Drawings
Fig. 1 is a schematic structural view of a dispensing device of the present invention.
Fig. 2 is a schematic structural diagram of a lithium ion battery prepared by the invention.
The glue dispensing device comprises a 100-glue dispensing tank, a 200-clamping piece, a 300-P L C controller, a 400-battery cell body, a 500-aluminum plastic film, 600-glue particles, a 1-glue particle storage chamber, a 2-heat insulation pad, a 3-heating chamber, a 4-glue outlet, a 21-channel, a 31-heating element and a 32-heat insulation layer.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and the accompanying drawings, but the embodiments of the invention are not limited thereto.
Example 1
As shown in fig. 1, a dispensing device for lithium ion battery production comprises a dispensing tank 100 provided with a dispensing outlet 4, the dispensing tank 100 is sequentially provided with a colloidal particle storage chamber 1, a heat insulation pad 2 and a heating chamber 3 which are communicated with each other from top to bottom, the dispensing outlet 4 is communicated with the heating chamber 3, and the temperature of the heating chamber 3 is controlled at 50-60 ℃.
Preferably, the diameter of the glue outlet 4 is 1-3 mm. More preferably, the diameter of the glue outlet 4 is 1.5-2 mm. The diameter of the glue outlet 4 is determined according to the size of the colloidal particles and is generally slightly larger than the diameter of the colloidal particles.
Preferably, the heat insulation pad 2 is provided with a channel 21 for allowing colloidal particles to pass through, and the diameter of the channel 21 is 1.5-2 mm. Through which passage 21 the colloidal particles pass from the storage chamber to the heating chamber 3. The diameter of the channel 21 is slightly larger than the diameter of the colloidal particle. The provision of channels 21 does not affect the insulation of insulation mat 2 because of the small size of the beads.
Preferably, the channel 21 is arranged vertically or obliquely.
Preferably, the thickness of the heat insulation pad 2 is 5-20 mm. The heat insulating pad 2 is mainly used for insulating heat of the heating chamber 3 from being transferred to the crumb rubber storage chamber 1, and preventing the crumb rubber in the crumb rubber storage chamber 1 from being melted. Too small a thickness of the heat insulating mat 2 has a poor heat insulating effect, while too large a thickness of the heat insulating mat 2 wastes material.
Preferably, the heating chamber 3 is provided with a heating member 31, and the heating temperature of the heating member 31 is 50-60 ℃. The colloidal particles are heated to the temperature so that the colloidal particles are only slightly hot melted, and therefore the problem that the colloidal particles are attached to the surface of a naked electric core and flow around is solved.
Preferably, the outer wall of the heating chamber 3 is provided with an insulating layer 32. The insulating layer 32 ensures that the temperature of the heating chamber 3 is maintained in a stable range, but is rapidly cooled, thereby reducing energy consumption.
Preferably, the dispensing device for lithium ion battery production further comprises a clamping member 200 and a P L C controller 300, wherein the clamping member 200 is connected with the dispensing tank 100, and the P L C controller 300 is connected with the clamping member 200 and the heating member 31 and is used for controlling the moving path of the clamping member 200 and the heating temperature of the heating member 31.
During the use, P L C controller 300 control holder 200 moves to the assigned position, and the micelle in the micelle apotheca 1 passes through the pipeline and gets into heating chamber 3, heats to 50 ~ 60 ℃ under the effect of heating member 31, then scribbles on the broad face of electricity core body through 4 points of glue outlet, and the point is scribbled once at every certain distance, forms the micelle that thickness is even and the distribution is even on the broad face of electricity core body at last.
Example 2
A method for producing a lithium ion battery using the dispensing device of embodiment 1, comprising the steps of:
s1, dispensing, namely uniformly dispensing the slightly hot-melt adhesive particles 600 on the aluminum foil on the wide surface of the battery cell body 400;
s2, packaging, namely packaging the battery cell body in the step S1 by the aluminum plastic film 500;
s3, carrying out hot pressing formation, namely carrying out hot pressing formation on the battery cell packaged in the step S2, and pressing and bonding the aluminum plastic film 500, the colloidal particles and the aluminum foil together at high temperature;
and S4, cooling, namely taking out the battery cell in the step S3 and cooling.
The lithium ion battery thus obtained is shown in fig. 2.
Performance testing
In order to embody the advancement of the present invention, comparative examples 1 and 2 were set up to compare with the battery prepared in example 2, respectively, in a drop test, and it was observed whether the foil and the separator of each cell were damaged. The comparative example 1 is a battery manufactured by adopting a traditional hot melt adhesive sticking mode, and the comparative example 2 is a battery manufactured by adopting a traditional glue spraying mode. The lengths and the widths of the battery cores of the batteries are 87mm and 63mm respectively, and the lengths and the widths of the hot melt adhesive are 50mm and 20mm respectively; the distance between every two bonding bodies prepared by glue spraying is 2mm, and the diameter of each bonding body is 1.5 mm; the distance between the colloidal particles is 2mm, and the diameter of the colloidal particles is 1.5 mm. The drop test conditions were: the drop height is 1.2m, and during actual measurement, the battery cores with different weights are manufactured by controlling different thicknesses of the battery cores. The test results are shown in table 1.
TABLE 1 test results
As can be seen from table 1, the battery manufactured by using the dispensing device of the present invention has good drop resistance, and the foil and the separator are not damaged, and the phenomenon of glue flowing around is also not generated.
Variations and modifications to the above-described embodiments may also occur to those skilled in the art, which fall within the scope of the invention as disclosed and taught herein. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious improvement, replacement or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (10)
1. A kind of glue dropping apparatus, its characterized in that: the glue dispensing tank comprises a glue dispensing tank provided with a glue outlet, wherein the glue dispensing tank is sequentially provided with a colloidal particle storage chamber, a heat insulation pad and a heating chamber which are communicated with each other from top to bottom, the glue outlet is communicated with the heating chamber, and the temperature of the heating chamber is controlled to be 50-60 ℃.
2. The dispensing apparatus of claim 1, wherein: the diameter of the glue outlet is 1-3 mm.
3. The dispensing apparatus of claim 1, wherein: the heat insulating pad is provided with a channel through which colloidal particles can pass, and the diameter of the channel is 1.5-2 mm.
4. The dispensing apparatus of claim 3, wherein: the channel is arranged vertically or obliquely.
5. The dispensing apparatus of claim 1, wherein: the thickness of heat insulating mattress is 5 ~ 20 mm.
6. The dispensing apparatus of claim 1, wherein: the heating chamber is provided with the heating member, the heating temperature of heating member is 50 ~ 60 ℃.
7. The dispensing apparatus of claim 1, wherein: and the outer wall of the heating chamber is provided with a heat insulation layer.
8. The dispensing apparatus of claim 6, wherein: still include the holder, the holder with the jar is connected is glued to the point.
9. The dispensing device according to claim 8, further comprising a P L C controller, wherein the P L C controller is connected with the clamping member and the heating member and is used for controlling the moving path of the clamping member and the heating temperature of the heating member.
10. A method for producing a lithium ion battery by using the dispensing device of any one of claims 1 to 9, comprising the steps of:
s1, dispensing, namely uniformly dispensing slightly hot-melt adhesive particles on the aluminum foil on the wide surface of the cell body;
s2, packaging, namely packaging the battery cell body in the step S1 by an aluminum plastic film;
s3, carrying out hot pressing formation, namely carrying out hot pressing formation on the battery cell packaged in the step S2, and pressing and bonding the aluminum plastic film, the colloidal particles and the aluminum foil together at high temperature;
and S4, cooling, namely taking out the battery cell in the step S3 and cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010215605.8A CN111430809A (en) | 2020-03-25 | 2020-03-25 | Dispensing device and lithium ion battery production method adopting same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010215605.8A CN111430809A (en) | 2020-03-25 | 2020-03-25 | Dispensing device and lithium ion battery production method adopting same |
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| Publication Number | Publication Date |
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| CN111430809A true CN111430809A (en) | 2020-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010215605.8A Pending CN111430809A (en) | 2020-03-25 | 2020-03-25 | Dispensing device and lithium ion battery production method adopting same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117594858A (en) * | 2024-01-17 | 2024-02-23 | 深圳市铭镭激光设备有限公司 | Automatic assembly production line and assembly method for energy storage battery |
-
2020
- 2020-03-25 CN CN202010215605.8A patent/CN111430809A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117594858A (en) * | 2024-01-17 | 2024-02-23 | 深圳市铭镭激光设备有限公司 | Automatic assembly production line and assembly method for energy storage battery |
| 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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