CN115863776A - Production method of soft package battery and smoothing hot-pressing device - Google Patents
Production method of soft package battery and smoothing hot-pressing device Download PDFInfo
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- CN115863776A CN115863776A CN202211590105.8A CN202211590105A CN115863776A CN 115863776 A CN115863776 A CN 115863776A CN 202211590105 A CN202211590105 A CN 202211590105A CN 115863776 A CN115863776 A CN 115863776A
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- 238000007731 hot pressing Methods 0.000 title claims abstract description 88
- 238000009499 grossing Methods 0.000 title claims abstract description 51
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 239000004831 Hot glue Substances 0.000 claims abstract description 159
- 239000010410 layer Substances 0.000 claims abstract description 159
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 75
- 239000002985 plastic film Substances 0.000 claims description 89
- 229920006255 plastic film Polymers 0.000 claims description 89
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 53
- 238000000034 method Methods 0.000 claims description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 10
- 239000012528 membrane Substances 0.000 abstract description 20
- 239000007788 liquid Substances 0.000 abstract description 18
- 229920000642 polymer Polymers 0.000 abstract description 11
- 230000000694 effects Effects 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
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- Sealing Battery Cases Or Jackets (AREA)
Abstract
The application discloses laminate polymer battery production method and smooth hot press unit, in the laminate polymer battery production method, before changing into to laminate polymer battery, first smooth hot-melt adhesive layer along the first direction in one side that keeps away from hot-melt adhesive layer at the plastic-aluminum membrane, then keep away from hot-melt adhesive layer at the plastic-aluminum membrane one side to hot-press the hot-melt adhesive layer, the action of smoothing to hot-melt adhesive layer can make the liquid between hot-melt adhesive layer and the plastic-aluminum membrane and between hot-melt adhesive layer and electric core, gaseous in order discharges, and then make the plastic-aluminum membrane, hot-melt adhesive layer and electric core three closely laminate, then carry out hot pressing to the three again, can reduce the possibility that produces the bubble between hot-melt adhesive layer and the plastic-aluminum membrane and between hot-melt adhesive layer and the electric core, thereby guarantee hot-melt adhesive layer's effective bonding area, the joint strength of plastic-aluminum film and electric core and laminate polymer battery's outward appearance yield.
Description
Technical Field
The application relates to the technical field of lithium ion batteries, in particular to a production method of a soft package battery and a smoothing hot-pressing device.
Background
Among the correlation technique, in order to reduce the drunkenness of inside electric core when laminate polymer battery uses, can set up one deck hot melt adhesive layer between electric core and plastic-aluminum membrane usually, in the formation process, extrude laminate polymer battery through hot pressing splint for hot melt adhesive layer melts, thereby bonds electric core and plastic-aluminum membrane, makes laminate polymer battery electric core and plastic-aluminum membrane relatively fixed when using, reduces electric core drunkenness, improves laminate polymer battery's security. However, in the formation process, the hot melt adhesive layer is melted and bonded to the battery cell and the aluminum plastic film through the hot pressing splint, and due to the fact that unevenness may exist on the surface of the battery cell and/or the surface of the hot pressing splint, bubbles are easily generated between the hot melt adhesive layer and the aluminum plastic film and/or between the hot melt adhesive layer and the battery cell of the soft package battery, the effective bonding area of the hot melt adhesive layer is reduced, and then the connection strength between the aluminum plastic film and the battery cell is insufficient, and the appearance of the soft package battery is poor.
Disclosure of Invention
The present application is directed to solving at least one of the problems in the prior art. Therefore, the application provides a production method of the soft package battery, which comprises the steps of flattening and hot-pressing the hot-melt adhesive layer before formation, so that the possibility of bubbles generated between the hot-melt adhesive layer and the aluminum-plastic film and between the hot-melt adhesive layer and the battery cell can be reduced, and the effective bonding area of the hot-melt adhesive layer, the connection strength of the aluminum-plastic film and the battery cell and the appearance yield of the soft package battery are ensured.
The application also provides a smoothing hot-pressing device applied to the production method of the soft package battery.
The production method of the soft package battery provided by the embodiment of the first aspect of the application comprises the following steps:
taking or preparing a battery cell, an aluminum plastic film and a hot melt adhesive layer;
preparing a soft package battery, and arranging the hot melt adhesive layer between the battery cell and the aluminum plastic film;
applying a first set pressure to the aluminum-plastic film on one side of the aluminum-plastic film, which is far away from the hot melt adhesive layer, and flattening the hot melt adhesive layer along a first direction;
applying a second set pressure and a set temperature to the aluminum-plastic film on one side of the aluminum-plastic film far away from the hot melt adhesive layer, and carrying out hot pressing on the hot melt adhesive layer;
and carrying out formation on the soft package battery.
The production method of the soft package battery provided by the embodiment of the first aspect of the application has at least the following beneficial effects: before forming the soft package battery, firstly, the hot melt adhesive layer is smoothed along the first direction on one side of the aluminum plastic film away from the hot melt adhesive layer, then hot pressing is carried out on the hot melt adhesive layer on one side of the aluminum plastic film away from the hot melt adhesive layer, the liquid between the hot melt adhesive layer and the aluminum plastic film and between the hot melt adhesive layer and the battery cell can be realized through the smoothing action on the hot melt adhesive layer, gas is discharged orderly, and then the aluminum plastic film is enabled to be realized, the hot melt adhesive layer is tightly attached to the battery cell three, then hot pressing is carried out on the three, the possibility of bubbles generated between the hot melt adhesive layer and the aluminum plastic film and between the hot melt adhesive layer and the battery cell can be reduced, thereby the effective bonding area of the hot melt adhesive layer is ensured, the connection strength of the aluminum plastic film and the battery cell and the appearance yield of the soft package battery are ensured.
In some embodiments of the present application, the applying a second set pressure and a set temperature to the aluminum-plastic film on the side of the aluminum-plastic film away from the hot-melt adhesive layer to perform hot pressing on the hot-melt adhesive layer includes: and applying a second set pressure and a set temperature to the aluminum-plastic film on one side of the aluminum-plastic film far away from the hot melt adhesive layer, and carrying out hot pressing on the hot melt adhesive layer along the first direction.
In some embodiments of this application, smooth along the first direction hot melt adhesive layer and follow the first direction is right hot melt adhesive layer carries out the hot pressing and goes on in step on the first direction, hot melt adhesive layer smooth the position with set for the distance has between hot melt adhesive layer's the hot pressing position, just hot melt adhesive layer smooth the position and be located the place ahead of hot melt adhesive layer's hot pressing position.
In some embodiments of the present application, the set distance is greater than 0mm and less than 10mm.
In some embodiments of the present application, the set temperature is 70 ℃ to 90 ℃.
In some embodiments of the present application, the first set pressure is 0.5MPa to 0.8MPa.
In some embodiments of the present application, the first set pressure is greater than or equal to the second set pressure.
The smoothing hot-pressing device provided by the embodiment of the second aspect of the application is applied to the production method of the soft package battery provided by some embodiments of the first aspect, and comprises a rack, a smoothing piece and a hot-pressing piece, wherein the smoothing piece comprises a first connecting part and a smoothing part, the first connecting part is connected to the rack, the smoothing part is connected to one end, away from the rack, of the first connecting part, and the smoothing part is used for smoothing the hot-melt adhesive layer; the hot pressing part comprises a second connecting part and a hot pressing part, the second connecting part is connected to the rack, the hot pressing part is connected to one end, far away from the rack, of the second connecting part, and the hot pressing part is used for hot pressing the hot melt adhesive layer; the flattening part and the hot pressing part can be simultaneously contacted with one side of the aluminum plastic film far away from the hot melt adhesive layer, and a set distance is reserved between the contact position of the flattening part and the aluminum plastic film and the contact position of the hot pressing part and the aluminum plastic film.
The hot pressing device that smooths that this application second aspect embodiment provided has following beneficial effect at least: during the use, smooth hot press unit and remove along the relatively laminate polymer battery of first direction, in the first direction, smooth the piece in the front, hot pressing piece is after, smooths hot-melt adhesive layer and follows along the first direction hot pressing to hot-melt adhesive layer goes on in step, smooths the hot-melt adhesive layer of part region and smooths, after liquid and the gas between discharge hot-melt adhesive layer and the plastic-aluminum membrane and between hot-melt adhesive layer and the electric core, hot pressing piece can carry out hot pressing to the region that smooths the piece, reduces and smooths the possibility that discharged liquid, gaseous refluence flow back have smoothed the region after flattening to effectively reduce the hot-melt adhesive layer and the plastic-aluminum membrane and between hot-melt adhesive layer and the electric core and produce the possibility of bubble, thereby guarantee the effective adhesive bonding area of hot-melt adhesive layer, the joint strength of plastic-aluminum film and electric core and laminate polymer battery's outward appearance yield.
In some embodiments of the present application, the smoothing portion has a contact surface for contacting the aluminum plastic film, and the contact surface is arc-shaped.
In some embodiments of the present application, the hot pressing portion is cylindrical, and the hot pressing portion is rotatably connected to the second connecting portion.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The present application is further described with reference to the following figures and examples, in which:
fig. 1 is a flow diagram of an improved pouch cell production process according to some embodiments of the first aspect of the present application;
FIG. 2 is a flowchart of S400 shown in FIG. 1;
fig. 3 is a schematic diagram of smoothing and hot-pressing a pouch battery by a smoothing and hot-pressing device provided in some embodiments of the second aspect of the present application.
Reference numerals:
the hot pressing device comprises a smoothing hot pressing device 100, a frame 110, a smoothing piece 120, a first connecting part 121, a smoothing part 122, a contact surface 1221, a hot pressing piece 130, a second connecting part 131, a hot pressing part 132, a soft package battery 200, a battery core 210, an aluminum plastic film 220 and a hot melt adhesive layer 230.
Detailed Description
Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, it is to be understood that the positional descriptions referred to, for example, the directions or positional relationships indicated above, below, left, right, etc., are based on the directions or positional relationships shown in the drawings, and are only for convenience of describing the present application and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present application.
In the description of the present application, unless otherwise expressly limited, terms such as set, mounted, connected and the like should be construed broadly, and those skilled in the art can reasonably determine the specific meaning of the terms in the present application by combining the detailed contents of the technical solutions.
Reference throughout this specification to the description of "one embodiment," "some embodiments," or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In the related art, in order to reduce the play of the internal battery cell 210 when the soft package battery 200 is used, a hot melt adhesive layer 230 is usually arranged between the battery cell 210 and the aluminum-plastic film 220, in the formation process, the soft package battery 200 is extruded through a hot pressing clamp plate, so that the hot melt adhesive layer 230 is melted, the battery cell 210 and the aluminum-plastic film 220 are bonded, the battery cell 210 and the aluminum-plastic film 220 are relatively fixed when the soft package battery 200 is used, the play of the battery cell 210 is reduced, and the safety of the soft package battery 200 is improved. However, in the formation process, the hot-melt adhesive layer 230 is melted and bonded to the battery cell 210 and the aluminum-plastic film 220 through the hot-pressing clamp plate, a pressure applied by the hot-pressing clamp plate to the soft package battery 200 is relatively large (about 1 MPa), since unevenness may exist on the surface of the battery cell 210 and/or the surface of the hot-pressing clamp plate, in the forming process, on one hand, overflow pressure of liquid and gas at each position of two sides of the hot-melt adhesive layer 230 is different, pressure received by a depression is relatively small, liquid and gas are easy to store, on the other hand, the liquid and gas at the depression are not easy to overflow due to surface contact between the hot-pressing clamp plate and the soft package battery 200, after the formation process is completed, the depression storing the fluid is no longer subjected to the pressure of the hot-pressing clamp plate, and expands, bubbles are generated between the hot-melt adhesive layer 230 and the aluminum-plastic film 220 of the soft package battery 200 and/or between the hot-melt adhesive layer 230 and the battery cell 210, so that an effective bonding area of the hot-melt adhesive layer 230 is reduced, and further, a connection strength between the aluminum-plastic film 220 and the battery 200 is not enough, and an appearance is poor.
Based on this, referring to fig. 1, a pouch battery production method provided in an embodiment of the first aspect of the present application includes the steps of:
s100, taking or preparing a battery cell 210, an aluminum plastic film 220 and a hot melt adhesive layer 230;
s200, preparing a soft package battery 200, and arranging a hot melt adhesive layer 230 between the battery cell 210 and the aluminum plastic film 220;
s300, applying a first set pressure to the aluminum plastic film 220 on the side, far away from the hot melt adhesive layer 230, of the aluminum plastic film 220, and smoothing the hot melt adhesive layer 230 along a first direction;
s400, applying a second set pressure and a set temperature to the aluminum plastic film 220 on the side, far away from the hot melt adhesive layer 230, of the aluminum plastic film 220, and carrying out hot pressing on the hot melt adhesive layer 230;
and S500, forming the soft package battery 200.
Before the formation of the soft package battery 200, the hot melt adhesive layer 230 is smoothed on one side of the aluminum-plastic film 220 away from the hot melt adhesive layer 230 along the first direction, then the hot melt adhesive layer 230 is hot-pressed on one side of the aluminum-plastic film 220 away from the hot melt adhesive layer 230, the hot melt adhesive layer 230 is smoothed along the first direction, the contact area when the hot melt adhesive layer is smoothed is smaller than the contact area when the hot pressing splint is used for hot pressing the soft package battery 200, liquid and gas between the hot melt adhesive layer 230 and the aluminum-plastic film 220 and between the hot melt adhesive layer 230 and the battery cell 210 can be discharged in order, and then the aluminum-plastic film 220, the hot melt adhesive layer 230 and the battery cell 210 are tightly attached, and then the three are hot-pressed, so that the possibility of bubbles generated between the hot melt adhesive layer 230 and the aluminum-plastic film 220 and between the hot melt adhesive layer 230 and the battery cell 210 can be reduced, and therefore the effective bonding area of the hot melt adhesive layer 230, the connection strength between the aluminum-plastic film 220 and the battery cell 210 and the appearance yield of the soft package battery 200 can be ensured.
Specifically, the set temperature in the step S400 is 70 ℃ to 90 ℃, so that the hot melt adhesive layer 230 is melted and exerts sufficient viscosity, the aluminum plastic film 220 is firmly bonded to the battery cell 210, and the play of the internal battery cell 210 when the soft package battery 200 is used is reduced; the first set pressure in the step S300 is 0.5MPa to 0.8MPa, and the first set pressure applied to the aluminum-plastic film 220 in the leveling process is set to be smaller than the pressure applied to the soft package battery 200 in the formation process, so that liquid and gas between the hot-melt adhesive layer 230 and the aluminum-plastic film 220 and between the hot-melt adhesive layer 230 and the battery cell 210 can be discharged in order, the possibility that the liquid and the gas cannot overflow due to the overlarge pressure applied to the aluminum-plastic film 220 can be reduced, and the leveling effect can be ensured.
Further, referring to fig. 2, S400 includes the steps of:
s410, applying a second set pressure and a set temperature to the aluminum plastic film 220 on the side of the aluminum plastic film 220 away from the hot melt adhesive layer 230, and performing hot pressing on the hot melt adhesive layer 230 along the first direction.
Carry out the hot pressing to hot melt adhesive layer 230 along the first direction, area of contact during the hot pressing is less than the hot-pressing splint and carries out the area of contact of hot pressing to laminate battery 200, can further make between hot melt adhesive layer 230 and the plastic-aluminum membrane 220 and the liquid between hot melt adhesive layer 230 and electric core 210, gaseous discharge in order, make plastic-aluminum membrane 220, the effect that hot melt adhesive layer 230 and electric core 210 three closely laminated is better, thereby further reduce between hot melt adhesive layer 230 and the plastic-aluminum membrane 220 and the possibility that produces the bubble between hot melt adhesive layer 230 and the electric core 210, guarantee hot melt adhesive layer 230's effective adhesive area, the joint strength of plastic-aluminum membrane 220 and electric core 210 and laminate battery 200's outward appearance yield.
Further, referring to fig. 1 and 3, smoothing the hot melt adhesive layer 230 along the first direction and hot-pressing the hot melt adhesive layer 230 along the first direction are performed simultaneously, in the first direction, a set distance D is provided between the smoothing position of the hot melt adhesive layer 230 and the hot-pressing position of the hot melt adhesive layer 230, and the smoothing position of the hot melt adhesive layer 230 is located in front of the hot-pressing position of the hot melt adhesive layer 230.
According to the first direction, the hot melt adhesive layer 230 in a partial region is flattened, after liquid and gas between the hot melt adhesive layer 230 and the aluminum plastic film 220 and between the hot melt adhesive layer 230 and the battery cell 210 in the partial region are discharged, hot pressing is immediately performed on the flattened region, the possibility that the discharged liquid and gas reversely flow back to the flattened region after flattening before hot pressing is reduced, and therefore the possibility that bubbles are generated between the hot melt adhesive layer 230 and the aluminum plastic film 220 and between the hot melt adhesive layer 230 and the battery cell 210 is effectively reduced, and the effective bonding area of the hot melt adhesive layer 230, the connection strength of the aluminum plastic film 220 and the battery cell 210 and the appearance yield of the soft package battery 200 are further ensured.
Specifically, referring to fig. 3, the set distance D between the leveling position of the hot melt adhesive layer 230 and the hot pressing position of the hot melt adhesive layer 230 is set to be greater than 0mm and smaller than 10mm, so that the possibility that the liquid and the gas discharged after leveling before hot pressing flows back to the leveled area can be effectively reduced, the leveled area can be hot pressed before the discharged liquid and gas flow back, the bonding effect between the aluminum plastic film 220 and the battery cell 210 is better, the possibility that bubbles are generated between the hot melt adhesive layer 230 and the aluminum plastic film 220 and between the hot melt adhesive layer 230 and the battery cell 210 is further effectively reduced, and the effective bonding area of the hot melt adhesive layer 230, the connection strength between the aluminum plastic film 220 and the battery cell 210, and the appearance yield of the soft package battery 200 are further ensured.
Further, the first set pressure applied to the aluminum plastic film 220 in the step S300 is set to be greater than or equal to the second set pressure applied to the aluminum plastic film 220 in the step S400, when the first set pressure is applied to the aluminum plastic film 220, the hot melt adhesive layer 230 and the battery cell 210, the liquid and the gas between the hot melt adhesive layer 230 and the aluminum plastic film 220 and between the hot melt adhesive layer 230 and the battery cell 210 are discharged, when the aluminum plastic film 220, the hot melt adhesive layer 230 and the battery cell 210 are subjected to the second set pressure which is not greater than the first set pressure during hot pressing, the hot melt adhesive layer 230 can be melted to bond the aluminum plastic film 220 and the battery cell 210, and the second set pressure is equal to or smaller than the first set pressure, so that the possibility that the melted hot melt adhesive layer 230 is extruded from between the aluminum plastic film 220 and the battery cell 210 due to an excessive pressure can be reduced, and the hot melt adhesive layer 230 with a sufficient thickness can be present between the aluminum plastic film 220 and the battery cell 210, so as to ensure the bonding strength.
Referring to fig. 3, the smoothing hot-pressing device 100 provided in an embodiment of a second aspect of the present application is applied to the method for producing the pouch battery provided in some embodiments of the first aspect, where the smoothing hot-pressing device 100 includes a frame 110, a smoothing member 120 and a hot-pressing member 130, the smoothing member 120 includes a first connecting portion 121 and a smoothing portion 122, the first connecting portion 121 is connected to the frame 110, the smoothing portion 122 is connected to one end of the first connecting portion 121 away from the frame 110, and the smoothing portion 122 is used for smoothing the hot-melt adhesive layer 230; the thermal pressing member 130 includes a second connecting portion 131 and a thermal pressing portion 132, the second connecting portion 131 is connected to the frame 110, the thermal pressing portion 132 is connected to one end of the second connecting portion 131 far away from the frame 110, and the thermal pressing portion 132 is used for performing thermal pressing on the hot melt adhesive layer 230; the smoothing portion 122 and the hot-pressing portion 132 can be simultaneously contacted with one side of the aluminum plastic film 220 away from the hot melt adhesive layer 230, and a set distance is formed between a contact position of the smoothing portion 122 and the aluminum plastic film 220 and a contact position of the hot-pressing portion 132 and the aluminum plastic film 220.
During use, the smoothing hot-press device 100 moves relative to the soft package battery 200 along the first direction, in the first direction, the smoothing part 120 is in front, the hot-press part 130 is behind, the hot-melt adhesive layer 230 is smoothed along the first direction and hot pressing is performed on the hot-melt adhesive layer 230 along the first direction synchronously, the smoothing part 120 smoothes part of the hot-melt adhesive layer 230, after liquid and gas between the hot-melt adhesive layer 230 and the aluminum plastic film 220 and between the hot-melt adhesive layer 230 and the battery cell 210 are discharged, the hot-press part 130 can hot-press the region smoothed by the smoothing part 120, the possibility that the discharged liquid and gas reversely flow back to the smoothed region is reduced, the possibility that bubbles are generated between the hot-melt adhesive layer 230 and the aluminum plastic film 220 and between the hot-melt adhesive layer 230 and the battery cell 210 is effectively reduced, and therefore the effective bonding area of the hot-melt adhesive layer 230, the connection strength between the aluminum plastic film 220 and the battery cell 210 and the appearance of the soft package battery 200 are guaranteed.
Referring to fig. 3, the smoothing portion 122 has a contact surface 1221 for contacting the aluminum plastic film 220, and the contact surface 1221 has an arc shape. The in-process that smooth hot melt adhesive layer 230 was smoothed to one side that smooth portion 122 kept away from hot melt adhesive layer 230 at plastic-aluminum membrane 220 rubs with plastic-aluminum membrane 220 directness, sets up contact surface 1221 into the arc and can effectively avoid smooth portion 122 scratch plastic-aluminum membrane 220, is favorable to guaranteeing laminate polymer battery 200's appearance quality and security performance.
Referring to fig. 3, the hot pressing part 132 has a cylindrical shape, and the hot pressing part 132 is rotatably connected to the second connecting part 131. During the use, hot pressing portion 132 rolls on the surface of plastic-aluminum membrane 220, because the contact position of hot pressing portion 132 and plastic-aluminum membrane 220 is changing all the time, the temperature that plastic-aluminum membrane 220 contacted is difficult for descending because of the heat transfer of long-time continuous contact, everywhere of hot melt adhesive layer 230 all can receive comparatively unanimous heating to can guarantee the viscidity uniformity of hot melt adhesive layer 230 performance after the hot pressing, guarantee the uniformity of the adhesive strength of different positions.
Further, the smoothing hot-press apparatus 100 further includes a pressure control system, the pressure control system is configured to control a first set pressure applied to one side of the aluminum-plastic film 220 away from the hot-melt adhesive layer 230 by the smoothing portion 122 and a second set pressure applied to one side of the aluminum-plastic film 220 away from the hot-melt adhesive layer 230 by the hot-press portion 132, so that in the process of moving the smoothing hot-press apparatus 100 along the first direction, the first set pressure applied to one side of the aluminum-plastic film 220 away from the hot-melt adhesive layer 230 by the smoothing portion 122 and the second set pressure applied to one side of the aluminum-plastic film 220 away from the hot-melt adhesive layer 230 by the hot-press portion 132 are both kept unchanged, and consistency of smoothing effect and hot-press effect at each position of the hot-melt adhesive layer 230 is ensured.
The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present application. Furthermore, the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
Claims (10)
1. The production method of the soft package battery is characterized by comprising the following steps:
taking or preparing a battery cell, an aluminum plastic film and a hot melt adhesive layer;
preparing a soft package battery, and arranging the hot melt adhesive layer between the battery cell and the aluminum plastic film;
applying a first set pressure to the aluminum-plastic film on one side of the aluminum-plastic film, which is far away from the hot melt adhesive layer, and flattening the hot melt adhesive layer along a first direction;
applying a second set pressure and a set temperature to the aluminum-plastic film on one side of the aluminum-plastic film far away from the hot melt adhesive layer, and carrying out hot pressing on the hot melt adhesive layer;
and carrying out formation on the soft package battery.
2. The production method of the laminate battery according to claim 1, wherein a second set pressure and a set temperature are applied to the aluminum plastic film on the side of the aluminum plastic film away from the hot melt adhesive layer, and the hot melt adhesive layer is subjected to hot pressing, and the method comprises the following steps:
and applying a second set pressure and a set temperature to the aluminum-plastic film on one side of the aluminum-plastic film far away from the hot melt adhesive layer, and carrying out hot pressing on the hot melt adhesive layer along the first direction.
3. The production method of the soft package battery according to claim 2, wherein the flattening along the first direction and the hot pressing of the hot melt adhesive layer along the first direction are performed simultaneously, and in the first direction, a set distance is provided between the flattening position of the hot melt adhesive layer and the hot pressing position of the hot melt adhesive layer, and the flattening position of the hot melt adhesive layer is located in front of the hot pressing position of the hot melt adhesive layer.
4. The production method of the pouch battery according to claim 3, characterized in that the set distance is greater than 0mm and less than 10mm.
5. The production method of the pouch battery according to claim 1, characterized in that the set temperature is 70 ℃ to 90 ℃.
6. The production method of the pouch battery according to claim 1, characterized in that the first set pressure is 0.5 to 0.8MPa.
7. The production method for the pouch battery according to claim 1, characterized in that the first set pressure is greater than or equal to the second set pressure.
8. A smoothing hot-pressing device is applied to the production method of the soft package battery of claim 3 or 4, and comprises the following steps:
a frame;
the smoothing part comprises a first connecting part and a smoothing part, the first connecting part is connected to the rack, the smoothing part is connected to one end, far away from the rack, of the first connecting part, and the smoothing part is used for smoothing the hot melt adhesive layer;
the hot pressing part comprises a second connecting part and a hot pressing part, the second connecting part is connected to the rack, the hot pressing part is connected to one end, far away from the rack, of the second connecting part, and the hot pressing part is used for hot pressing the hot melt adhesive layer;
the flattening part and the hot pressing part can be simultaneously contacted with one side of the aluminum plastic film far away from the hot melt adhesive layer, and a set distance is reserved between the contact position of the flattening part and the aluminum plastic film and the contact position of the hot pressing part and the aluminum plastic film.
9. The smoothing hot-pressing device according to claim 8, wherein the smoothing portion has a contact surface for contacting the aluminum-plastic film, and the contact surface is arc-shaped.
10. The apparatus of claim 8, wherein the hot pressing portion is cylindrical and is rotatably connected to the second connecting portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211590105.8A CN115863776A (en) | 2022-12-12 | 2022-12-12 | Production method of soft package battery and smoothing hot-pressing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211590105.8A CN115863776A (en) | 2022-12-12 | 2022-12-12 | Production method of soft package battery and smoothing hot-pressing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115863776A true CN115863776A (en) | 2023-03-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211590105.8A Pending CN115863776A (en) | 2022-12-12 | 2022-12-12 | Production method of soft package battery and smoothing hot-pressing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115863776A (en) |
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2022
- 2022-12-12 CN CN202211590105.8A patent/CN115863776A/en active Pending
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