CN109713211B - Fixing clamp for pole piece baking and baking method thereof - Google Patents

Abstract

The invention discloses a fixing fixture for pole piece baking, which includes at least one superimposed clamp mechanism. Each clamp mechanism includes an annular fixed plate and a fixed buckle. The first and last ends of the annular fixed plate are fixed by Snap-on connection; a method for baking pole pieces is also disclosed. Through the present invention, the pole pieces will not be deformed due to repeated vacuuming in the oven during the baking process; the alignment of the pole pieces can be ensured. Reduces secondary rewinding corrections, has a simple structure and is easy to use.

Description

Fixing fixture for pole piece baking and its baking method

Technical field

This application relates to the technical field of secondary battery processing, a fixing fixture for pole piece baking and its baking method.

Background technique

New energy batteries have become a very hot topic at present, and more and more companies are investing in new energy batteries. As a structure of new energy batteries, the pole piece baking process is very important. The completed state of the pole piece baking directly determines the production efficiency and quality of the winding process. However, because when the pole piece is baked in the current production line, employees manually fix the outermost layer of the pole piece with glue, which results in low production efficiency and The degree of fixation of the counter pole pieces cannot be guaranteed.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a fixing fixture for pole piece baking and a baking method thereof.

In order to achieve the above objects, the technical solution of the present invention is implemented as follows:

An embodiment of the present invention provides a fixing fixture for pole piece baking, which includes at least one superposed clamp mechanism. Each clamp mechanism includes an annular fixing plate and a fixing buckle. The first and last ends of the annular fixing plate pass through Fixed snap connection.

In the above solution, the annular fixed plate is located on the outermost layer of the unbaked pole piece.

In the above solution, the fixed plate is made of high temperature resistant and flexible material.

In the above solution, the fixing buckle is made of metal.

An embodiment of the present invention also provides a baking method using the fixing fixture for pole piece baking as described in any one of the above solutions, which is characterized in that the method is implemented through the following steps:

Step 1. Take the cut pole pieces and wind them to obtain the pole piece roll material;

Step 2: Take the kraft paper and bake it under high temperature and vacuum conditions to obtain baked kraft paper;

Step 3: Slit the baked kraft paper obtained in step 2 to obtain kraft leather;

Step 4: Wrap the cowhide belt obtained in step 3 on the outer layer of the pole piece roll obtained in step 1 to obtain the finished pole piece roll;

Step 5: Set at least one annular fixed plate on the outer layer of the pole piece coil and fix it with a fixed buckle, bake it under high temperature and vacuum conditions, and vacuum cool it to obtain the baked finished pole piece coil material. ;

Step 6: Rewind the kraft paper wrapped around the baked finished pole piece coil material obtained in step 5 and the baked finished pole piece coil material to obtain the baked pole piece.

In the above scheme, the baking temperature is 100~120°C, the baking time is 2~8h, and the vacuum degree is ≤-80KPa.

In the above solution, the length of the cowhide belt is 50~100m, and the thickness of the cowhide belt is 80~200μm.

In the above solution, the width of the cowhide belt is 0 to 5 cm larger than the width of the pole piece roll material.

In the above scheme, the baking temperature is 80~150°C, the baking time is 32~48h, and the vacuum degree is ≤-80KPa.

In the above solution, in step 5, the vacuum cooling temperature is ≤50°C.

Compared with the existing technology, the present invention can realize that the pole pieces will not be deformed due to repeated vacuuming of the oven during the baking process; it can ensure the alignment of the pole pieces, reduce secondary rewinding corrections, has a simple structure and is easy to use. convenient.

Description of the drawings

Figure 1 is a perspective view of a fixing fixture used for pole piece baking according to an embodiment of the present invention;

Figure 2 is a front view of a fixing fixture used for pole piece baking according to an embodiment of the present invention;

Figure 3 is a side view of a fixing fixture used for pole piece baking according to an embodiment of the present invention;

Figure 4 is a top view of a fixing fixture for pole piece baking according to an embodiment of the present invention.

Implementation

In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not intended to limit the present invention.

An embodiment of the present invention provides a fixing fixture for pole piece baking, as shown in Figures 1-4, which includes at least one superimposed clamp mechanism. Each clamp mechanism includes an annular fixing plate 1 and a fixing buckle 2. The first and last ends of the annular fixed plate 1 are connected through fixed buckles 2, so that the pole pieces will not be deformed due to repeated vacuuming of the oven during the baking process.

The annular fixed plate 1 is located on the outermost layer of the unbaked pole piece 3 .

The fixed plate 1 is made of high temperature resistant and flexible material.

The fixing buckle 2 is made of metal.

During use, the head and tail of the fixed plate 1 are connected and fastened using the fixed buckles 2. The operation of the present invention is relatively simple, the structure is ingenious, the installation and disassembly are very convenient, the space occupied is small, and it can be reused. There is no damage to the surface of the counter pole piece, and it has a wide range of applications. It can effectively prevent the pole piece film roll from being blown away during the baking process.

Since there are differences in the heights of the pole pieces, multiple clamp mechanisms can be superimposed according to the height of the coil to fix the entire pole piece.

Embodiments of the present invention also provide a method for baking pole pieces, which method is implemented through the following steps:

Step 1. Take the cut pole pieces and wind them to obtain the pole piece roll material;

Step 2: Take the kraft paper and bake it under high temperature and vacuum conditions to obtain baked kraft paper;

Step 3: Slit the baked kraft paper obtained in step 2 to obtain kraft leather;

Step 4: Wrap the cowhide belt obtained in step 3 on the outer layer of the pole piece roll obtained in step 1 to obtain the finished pole piece roll;

Step 5: Set at least one annular fixed plate 1 on the outer layer of the pole piece roll and fix it through the fixing buckle 2, bake it under high temperature and vacuum conditions, and vacuum cool it to obtain the baked finished pole piece. roll stock;

Step 6: Rewind the kraft paper wrapped around the baked finished pole piece coil material obtained in step 5 and the baked finished pole piece coil material to obtain the baked pole piece.

The baking temperature is 100~120°C, the baking time is 2~8h, and the vacuum degree is ≤-80KPa.

The length of the cowhide belt is 50~100m, and the thickness of the cowhide belt is 80~200μm.

The width of the cowhide belt is 0 to 5 cm larger than the width of the pole piece roll material.

The baking temperature is 80~150°C, the baking time is 32~48h, and the vacuum degree is ≤-80KPa.

The vacuum cooling temperature is ≤50°C.

Example 1

Step 1. Take the cut pole pieces and wind them to obtain the pole piece roll material;

Step 2: Take the kraft paper and bake it for 4 hours at 110°C and vacuum degree ≤ -80KPa to obtain the baked kraft paper;

Step 3. Cut the baked kraft paper obtained in step 2 into kraft belts with a length of 50 m and a thickness of 120 μm;

Step 4. Wrap the cowhide belt obtained in step 3 on the outer layer of the pole piece roll obtained in step 1 to obtain the finished pole piece roll, wherein the width of the cowhide strap is 4 mm greater than the width of the pole piece roll;

Step 5. Set at least one annular fixed plate 1 on the outer layer of the pole piece roll and fix it through the fixed buckle 2. Under the conditions of 110°C, vacuum degree ≤ -80KPa and inert gas filling and discharging every 2 hours. Bake the finished pole piece coil material obtained in step 4 for 36 hours at a vacuum cooling temperature of ≤50°C to obtain the baked finished pole piece coil material;

Step 6: Rewind the kraft paper wrapped around the baked finished pole piece coil material obtained in step 5 and the baked finished pole piece coil material to obtain the baked pole piece.

Example 2

Step 1. Take the cut pole pieces and wind them to obtain the pole piece roll material;

Step 2: Take the kraft paper and bake it for 2 hours at 100°C and vacuum degree ≤ -80KPa to obtain the baked kraft paper;

Step 3. Cut the baked kraft paper obtained in step 2 into kraft belts with a length of 80m and a thickness of 100 μm;

Step 4. Wrap the cowhide belt obtained in step 3 on the outer layer of the pole piece roll obtained in step 1 to obtain the finished pole piece roll. The width of the cowhide strap is 1 cm greater than the width of the pole piece roll;

Step 5. Set at least one annular fixed plate 1 on the outer layer of the pole piece coil and fix it through the fixed buckle 2. Under the conditions of 80°C, vacuum degree ≤ -80KPa and inert gas filling and discharging every 1 hour. Bake the finished pole piece coil material obtained in step 4 for 32 hours at a vacuum cooling temperature of ≤50°C to obtain the baked finished pole piece coil material;

Step 6: Rewind the kraft paper wrapped around the baked finished pole piece coil material obtained in step 5 and the baked finished pole piece coil material to obtain the baked pole piece.

Example 3

Step 1. Take the cut pole pieces and wind them to obtain the pole piece roll material;

Step 2: Take the kraft paper and bake it for 8 hours at 120°C and vacuum degree ≤ -80KPa to obtain the baked kraft paper;

Step 3. Cut the baked kraft paper obtained in step 2 into kraft belts with a length of 100 m and a thickness of 80 μm;

Step 4. Wrap the cowhide belt obtained in step 3 on the outer layer of the pole piece roll obtained in step 1 to obtain the finished pole piece roll. The width of the cowhide strap is 2 cm greater than the width of the pole piece roll;

Step 5. Set at least one annular fixed plate 1 on the outer layer of the pole piece roll and fix it through the fixed buckle 2. Under the conditions of 150°C, vacuum degree ≤ -80KPa and inert gas filling and discharging every 4 hours. Bake the finished pole piece coil material obtained in step 4 for 48 hours at a vacuum cooling temperature of ≤50°C to obtain the baked finished pole piece coil material;

Step 6: Set at least one annular fixing plate 1 on the outer layer of the pole piece roll and fix it through the fixing buckle 2, and cover the baked finished pole piece roll obtained in step 5. The kraft paper and the finished pole piece roll material after baking are rerolled to obtain the baked pole piece.

Example 4

Step 1. Take the cut pole pieces and wind them to obtain the pole piece roll material;

Step 2: Take the kraft paper and bake it for 2 to 8 hours at 110°C and vacuum degree ≤ -90KPa to obtain the baked kraft paper;

Step 3. Cut the baked kraft paper obtained in step 2 into kraft belts with a length of 70m and a thickness of 200 μm;

Step 4. Wrap the cowhide belt obtained in step 3 on the outer layer of the pole piece roll obtained in step 1 to obtain the finished pole piece roll. The width of the cowhide strap is 0~5 cm larger than the width of the pole piece roll;

Step 5. Set at least one annular fixed plate 1 on the outer layer of the pole piece coil and fix it through the fixed buckle 2. Under the conditions of 100°C, vacuum degree ≤ -80KPa and inert gas filling and discharging every 3 hours. Bake the finished pole piece coil material obtained in step 4 for 40 hours at a vacuum cooling temperature of ≤50°C to obtain the baked finished pole piece coil material;

Step 6: Rewind the kraft paper wrapped around the baked finished pole piece coil material obtained in step 5 and the baked finished pole piece coil material to obtain the baked pole piece.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the scope of the present invention.

Claims (6)

1. A pole piece baking method using a fixed fixture, characterized by: The fixed clamp includes at least one superimposed clamp mechanism. Each clamp mechanism includes an annular fixed plate and a fixed buckle. The first and last ends of the annular fixed plate are connected by fixed buckles. The annular fixed plate is located in the unbaked position. The outermost layer of the pole piece, the fixed plate is made of high temperature resistant and flexible material, and the fixed buckle is made of metal; This method is implemented through the following steps: Step 1. Take the cut pole pieces and wind them to obtain the pole piece roll material; Step 2: Take the kraft paper and bake it under vacuum conditions at 100~120°C to obtain baked kraft paper; Step 3: Slit the baked kraft paper obtained in step 2 to obtain kraft leather; Step 4: Wrap the cowhide belt obtained in step 3 on the outer layer of the pole piece roll obtained in step 1 to obtain the finished pole piece roll; Step 5: Set at least one annular fixed plate on the outer layer of the pole piece roll and fix it with a fixed buckle, bake it under vacuum conditions at 80~150°C, and vacuum cool it to obtain the finished pole after baking. sheet roll material; Step 6: Rewind the kraft paper wrapped around the baked finished pole piece coil material obtained in step 5 and the baked finished pole piece coil material to obtain the baked pole piece. 2. A pole piece baking method using a fixed fixture according to claim 1, characterized in that in step 2, the baking time is 2 to 8 hours, and the vacuum degree is ≤-80KPa. 3. A pole piece baking method using a fixed fixture according to claim 1 or 2, characterized in that in step 3, the length of the cowhide belt is 50~100m, and the thickness of the cowhide belt is 80~200μm. 4. A pole piece baking method using a fixed clamp according to claim 3, characterized in that in step 4, the width of the cowhide belt is 0 to 5 cm larger than the width of the pole piece roll. 5. A pole piece baking method using a fixed fixture according to claim 4, characterized in that in step 5, the baking time is 32 to 48 hours, and the vacuum degree is ≤-80KPa. 6. A pole piece baking method using a fixed fixture according to claim 5, characterized in that in step 5, the vacuum cooling temperature is ≤50°C.