Glue injection mold of battery piece

Abstract

The utility model discloses a glue injection mould of a battery piece, which comprises a mould body, a plurality of glue injection holes are formed on the mould body, the glue injection holes penetrate through the mould body along the thickness direction of the mould body, the plurality of glue injection holes are arranged on the mould body at intervals, the cross sectional areas of the plurality of glue injection holes are the same, and the glue injection holes are communicated with the mould body. Therefore, the sizes of the glue points formed on the battery piece can be the same. Therefore, the glue can conveniently flow to the battery piece through the glue injection hole, so that the glue falls to a specified position, and the range of the length, the width and the height of each glue point on the battery piece can be controlled within a very small range, so that the consistency of the binding force of the solidified welding strip and the battery piece can be ensured, the yield of the technological process can be improved, and the cost can be saved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery slices, in particular to a glue injection mold for a battery slice. Background Art

[0002] The main-grid-free crystalline silicon cell interconnection technology mainly uses the glue brushing method to stick the soldering ribbon and the cell firmly. The glue brushing on the cell requires a scraper and a stencil, but the glue brushing method in the prior art cannot control the length, width and height of each glue point very well. There is a large range in the length, width and height of the glue points. The uneven glue points on the surface of the cell will cause the bonding force between the soldering ribbon and the cell to be large or small. The large glue points have a strong bonding force, but it is also easy to break the glue film in the subsequent lamination. The small glue points have a small bonding force and it is easy to cause the soldering ribbon to deviate during the lamination process. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a battery cell glue injection mold, which can facilitate the flow of glue to the battery cell through the glue injection hole, so that the glue falls to the specified position, and can also control the length, width and height of each glue point on the battery cell within a very small range, thereby ensuring the consistency of the bonding force between the solder strip and the battery cell after curing, and can also improve the yield of the process and save costs.

[0004] According to the embodiment of the utility model, the glue injection mold for the battery cell includes: a mold body, the mold body is formed with a plurality of glue injection holes, the glue injection holes penetrate the mold body along the thickness direction of the mold body, the plurality of glue injection holes are arranged at intervals on the mold body, and the cross-sectional areas of the plurality of glue injection holes are the same, so that the glue points formed on the battery cell have the same size.

[0005] Therefore, the glue injection mold of the battery cell can facilitate the glue to flow to the battery cell through the glue injection hole, so that the glue falls to the specified position, and can also control the extreme difference of the length, width and height of each glue point on the battery cell within a very small range, thereby ensuring the consistency of the bonding force between the solder strip and the battery cell after curing, and can also improve the yield of the process and save costs.

[0006] According to some embodiments of the present invention, a plurality of the glue injection holes are arranged in rows on the mold. According to some embodiments of the present invention, a cross section of the glue injection hole is circular and an inner wall is a smooth surface.

[0007] According to some embodiments of the utility model, the glue injection mold of the battery cell further includes: a glue injection tube, the glue injection tube is arranged on the mold body, and each of the glue injection holes is connected to the glue injection tube.

[0008] According to some embodiments of the present utility model, there are multiple glue injection tubes, and the multiple glue injection tubes are connected to the multiple glue injection holes in a one-to-one correspondence.

[0009] According to some embodiments of the utility model, the mold body is formed with a plurality of vacuum adsorption holes, the vacuum adsorption holes penetrate the mold body along the thickness direction of the mold body, and the plurality of vacuum adsorption holes are arranged at intervals on the mold body.

[0010] According to some embodiments of the present invention, the plurality of vacuum adsorption holes are respectively arranged at both ends and a middle portion of the mold body in the length direction and are spaced apart along the width direction of the mold body.

[0011] According to some embodiments of the utility model, the glue injection mold for the battery cell further includes: a vacuum adsorption tube, the vacuum adsorption tube is arranged on the mold body, and each of the vacuum adsorption holes is connected to the vacuum adsorption tube.

[0012] According to some embodiments of the utility model, there are multiple vacuum adsorption tubes, and the multiple vacuum adsorption tubes are connected to the multiple vacuum adsorption holes in a one-to-one correspondence.

[0013] According to some embodiments of the present invention, the cross-sectional area of ​​the glue injection hole is smaller than the cross-sectional area of ​​the vacuum adsorption hole.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0016] Figure 1 It is a structural schematic diagram of a glue injection mold according to an embodiment of the utility model;

[0017] Figure 2 It is a schematic diagram of the distribution of the injection holes and the vacuum adsorption holes on the mold body according to an embodiment of the utility model.

[0018] Reference numerals:

[0019] 100. Glue injection mold;

[0020] 10. Mold body; 11. Glue injection hole;

[0021] 20. Glue injection hose;

[0022] 30. Vacuum adsorption hole; 40. Vacuum adsorption tube. DETAILED DESCRIPTION

[0023] Embodiments of the present invention are described in detail below, and the embodiments described with reference to the accompanying drawings are exemplary.

[0024] Reference below Figure 1 and Figure 2 As shown, a glue injection mold 100 for a battery cell according to an embodiment of the present utility model is described.

[0025] like Figure 1 As shown, the glue injection mold 100 of the battery cell according to the embodiment of the utility model includes: a mold body 10, the mold body 10 is formed with a plurality of glue injection holes 11, the glue injection holes 11 penetrate the mold body 10 along the thickness direction of the mold body 10, and the plurality of glue injection holes 11 are arranged at intervals on the mold body 10, and the cross-sectional areas of the plurality of glue injection holes 11 are the same, so that the sizes of the glue points formed on the battery cell can be the same.

[0026] Specifically, traditional battery cells mainly use the glue brushing method to stick the solder ribbon and the battery cell firmly. Brushing glue on the battery cell requires a scraper and a stencil, but this glue brushing method cannot control the length, width, and height of each glue point very well. There is a large range in the length, width, and height of the glue points. The uneven glue points on the surface of the battery cell will cause the bonding force between the solder ribbon and the battery cell to be large or small. When the glue point has a large bonding force, it is easy to break the glue film in the subsequent lamination. When the glue point has a small bonding force, it is easy to cause the solder ribbon to be deviated during the lamination process.

[0027] Therefore, the mold body 10 in the glue injection mold 100 of the battery cell is provided with a plurality of glue injection holes 11, and the glue injection holes 11 penetrate the mold body 10 along the thickness direction of the mold body 10, so that the glue can flow to the battery cell through the glue injection holes 11. In this way, the glue injection holes 11 have a guiding function, so that the glue can fall to a designated position, and can also prevent the glue from falling to other positions, and can also prevent uneven distribution of the glue on the battery cell.

[0028] Moreover, multiple glue injection holes 11 are evenly spaced on the mold body 10, so that multiple glue points can be evenly distributed on the battery cell, and the bonding force on the battery cell can be even, so that the welding strip and the battery cell can be bonded more evenly.

[0029] Furthermore, the cross-sectional areas of the multiple glue injection holes 11 are the same, that is, the apertures of the multiple glue injection holes 11 are the same. When an equal amount of colloid is injected into each glue injection hole 11, the colloid flows into the battery cell through the glue injection holes 11 with the same aperture. In this way, the size of the glue dots falling on the battery cell from each glue injection hole 11 can be controlled to be consistent, that is, the extreme differences in length, width and height between the glue dots on the surface of the battery cell are controlled within a very small range, thereby making the bonding force between the battery cell and the soldering ribbon more uniform, reducing the risk of soldering ribbon deviation after lamination and the risk of the glue film being broken by the glue dots due to uneven glue dot size, thereby protecting the battery cell.

[0030] Therefore, the glue injection mold 100 of the battery cell can facilitate the glue to flow to the battery cell through the glue injection hole 11, so that the glue falls to the specified position, and can also control the extreme difference of the length, width and height of each glue point on the battery cell within a very small range, thereby ensuring the consistency of the bonding force between the solder strip and the battery cell after curing, and can also improve the yield of the process and save costs.

[0031] According to some embodiments of the present invention, Figure 2 As shown, a plurality of injection holes 11 are arranged in rows on the mold body 10 .

[0032] Among them, the multiple glue injection holes 11 can be arranged in four rows and six columns on the mold body 10, so that the multiple glue injection holes 11 can cover the entire mold body 10. In this way, the colloid can be injected into the battery cell through the four rows and six columns of glue injection holes 11, so that the glue points on the battery cell are distributed in four rows and six columns, and the length, width and height of the glue points on each battery cell are consistent, so that uniform glue injection of the entire battery cell can be achieved.

[0033] According to some embodiments of the present invention, Figure 2 As shown, the cross section of the glue injection hole 11 is circular, and the inner wall of the glue injection hole 11 is a smooth surface.

[0034] Among them, the cross-section of the glue injection hole 11 can be set to be circular. Since the circular hole has a relatively uniform edge, the colloid is more easily evenly distributed around the hole during the injection process, which can avoid uneven flow of the colloid around the circular hole, thereby ensuring that the colloid is more uniform on the surface of the battery cell.

[0035] Moreover, the edges of circular holes are usually stronger than holes of other shapes. This is because the edges of circular holes are less susceptible to stress concentration and can better maintain structural integrity near the edges of the circular holes, thereby improving the strength and durability of the injection mold 100.

[0036] Furthermore, the inner wall of the injection hole 11 is a smooth surface. The smooth inner wall can reduce the flow resistance of the colloid during the injection process. The friction encountered by the colloid during flow is smaller, which can make the colloid flow out of the injection hole 11 more easily and can be more evenly coated on the surface of the battery cell, thereby ensuring the uniform distribution of the colloid and the coating quality.

[0037] In addition, the smooth inner wall can reduce the residue of the colloid during the injection process. Compared with the injection hole 11 whose inner wall has an uneven or rough surface, the smooth inner wall can better prevent the colloid from remaining in the depressions or irregular surfaces of the inner wall of the injection hole 11, thereby improving the utilization rate of the colloid and reducing material waste.

[0038] Moreover, a smooth inner wall can avoid the generation of bubbles and other defects. During the colloid injection process, if the inner wall surface of the injection hole 11 is not smooth, it is easy to cause bubbles to adhere or the colloid to flow unevenly, resulting in defects on the battery cell surface. The smooth inner wall surface of the injection hole 11 can better promote the flow of the colloid and reduce the generation of bubbles, thereby achieving high-quality dispensing on the battery cell.

[0039] According to some embodiments of the present invention, Figure 1 As shown, the glue injection mold 100 of the battery cell further includes: a glue injection tube 20 , which is disposed on the mold body 10 , and each glue injection hole 11 is connected to the glue injection tube 20 .

[0040] The glue adding device can transport the glue to the glue injection hole 11 through the glue injection tube 20, and then the glue flows to the battery cell through the glue injection hole 11. Each glue injection hole 11 is connected to a corresponding glue injection tube 20. In this way, the speed of the glue flowing to each glue injection hole 11 can be accelerated, thereby increasing the glue dispensing rate on the battery cell.

[0041] According to some embodiments of the present invention, there are multiple glue injection tubes 20 , and the multiple glue injection tubes 20 are connected to the multiple glue injection holes 11 in a one-to-one correspondence.

[0042] Among them, one glue injection hole 11 is correspondingly connected to a glue injection tube 20, so that the amount of colloid flowing to each glue injection hole 11 can be controlled. Each glue injection tube 20 can correspondingly inject an equal amount of colloid into each glue injection hole 11. The equal amount of colloid flows to the surface of the battery cell through the glue injection holes 11 with the same aperture, thereby ensuring that the size of the glue spots on the battery cell is consistent.

[0043] According to some embodiments of the present invention, Figure 1 As shown, the mold body 10 is formed with a plurality of vacuum adsorption holes 30 , which penetrate the mold body 10 along the thickness direction of the mold body 10 , and the plurality of vacuum adsorption holes 30 are arranged at intervals on the mold body 10 .

[0044] The vacuum adsorption hole 30 penetrates the mold body 10 along the thickness direction of the mold body 10 . When the air in the vacuum adsorption hole 30 forms a vacuum, the outlet of the vacuum adsorption hole 30 contacts the battery cell, so that the battery cell and the vacuum adsorption hole 30 can be adsorbed to each other.

[0045] Moreover, multiple vacuum adsorption holes 30 are evenly spaced on the mold body 10. Since an adsorption force is generated between the battery cell and the vacuum adsorption holes 30, the battery cell can be tightly adsorbed on the injection mold 100. Multiple vacuum adsorption holes 30 are evenly spaced on the mold body 10, which can further make the adsorption force between the battery cell and the injection mold 100 more uniform, and can also make the battery cell and the injection mold 100 tightly adsorbed together, and can also prevent the overall battery cell from being deformed.

[0046] In addition, during the glue injection process, since the battery cell and the glue injection mold 100 are tightly adsorbed together, when the glue flows out of the glue injection hole 11 to the battery cell, due to the extrusion between the battery cell and the glue injection mold 100, the glue point can be quickly formed and the glue can be prevented from flowing to other locations.

[0047] According to some embodiments of the present invention, Figure 2 As shown, the plurality of vacuum adsorption holes 30 are respectively disposed at both ends and the middle of the mold body 10 in the length direction, and the plurality of vacuum adsorption holes 30 are spaced apart along the width direction of the mold body 10 .

[0048] The vacuum adsorption holes 30 are respectively arranged at the two ends and the middle of the length direction, which can prevent the battery cell from being deformed due to gravity. Specifically, a plurality of vacuum adsorption holes 30 are respectively arranged at the two ends of the mold body 10, and adsorption force is generated between the vacuum adsorption holes 30 at the two ends of the mold body 10 and the two ends of the battery cell, thereby preventing the two ends of the battery cell from being deformed.

[0049] Furthermore, a plurality of vacuum adsorption holes 30 are arranged in the middle of the length direction of the mold body 10. During the injection process, an adsorption force is generated between the vacuum adsorption holes 30 in the middle of the mold body 10 and the middle of the battery cell, thereby preventing the middle of the battery cell from being deformed.

[0050] According to some embodiments of the present invention, Figure 1 As shown, the glue injection mold 100 of the battery cell further includes: a vacuum adsorption tube 40 , which is disposed on the mold body 10 , and each vacuum adsorption hole 30 is connected to the vacuum adsorption tube 40 .

[0051] Among them, each vacuum adsorption hole 30 is connected to a vacuum adsorption tube 40, and the vacuum adsorption tube 40 can be connected to a vacuum pump. In this way, the vacuum pump can generate negative pressure in each vacuum adsorption hole 30, so that the battery cell can be tightly adsorbed on the mold body 10, thereby facilitating the dispensing of the battery cell.

[0052] According to a specific embodiment of the present invention, there are a plurality of vacuum adsorption tubes 40 , and the plurality of vacuum adsorption tubes 40 are connected to the plurality of vacuum adsorption holes 30 in a one-to-one correspondence.

[0053] Specifically, one vacuum adsorption hole 30 is connected to a corresponding vacuum adsorption tube 40, so that the speed of forming negative pressure in each vacuum adsorption hole 30 can be accelerated, maintenance and replacement can be facilitated, and the connection between the battery cell and the mold body 10 can be made more stable and firm.

[0054] According to some embodiments of the present invention, Figure 1 As shown, the cross-sectional area of ​​the glue injection hole 11 is smaller than the cross-sectional area of ​​the vacuum adsorption hole 30 .

[0055] The diameter of the glue injection hole 11 is smaller than the diameter of the vacuum adsorption hole 30 , so that during the glue injection process, the adsorption force between the battery cell and the mold body 10 is relatively large, thereby preventing the battery cell from falling off.

[0056] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0057] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0058] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A glue injection mold for a battery cell, characterized in that: include: The mold body is formed with a plurality of glue injection holes, the glue injection holes penetrate the mold body along the thickness direction of the mold body, the plurality of glue injection holes are arranged at intervals on the mold body, and the cross-sectional areas of the plurality of glue injection holes are the same, so that the glue points formed on the battery cell have the same size.

2. The battery cell injection mold according to claim 1, characterized in that: The plurality of injection holes are arranged in rows and columns on the mold body.

3. The battery cell injection mold according to claim 1, characterized in that: The cross section of the glue injection hole is circular and the inner wall is a smooth surface.

4. The battery cell injection mold according to claim 1, characterized in that: Also includes: A glue injection tube is arranged on the mold body, and each of the glue injection holes is connected to the glue injection tube.

5. The battery cell injection mold according to claim 4, characterized in that: There are multiple glue injection tubes, and the multiple glue injection tubes are connected to the multiple glue injection holes in a one-to-one correspondence.

6. The battery cell injection mold according to claim 1, characterized in that: The mold body is formed with a plurality of vacuum adsorption holes, the vacuum adsorption holes penetrate the mold body along the thickness direction of the mold body, and the plurality of vacuum adsorption holes are arranged at intervals on the mold body.

7. The battery cell injection mold according to claim 6, characterized in that: The plurality of vacuum adsorption holes are respectively arranged at both ends and the middle of the mold body in the length direction and are spaced apart along the width direction of the mold body.

8. The battery cell injection mold according to claim 6, characterized in that: Also includes: A vacuum adsorption tube is arranged on the mold body, and each of the vacuum adsorption holes is connected to the vacuum adsorption tube.

9. The battery cell injection mold according to claim 8, characterized in that: There are a plurality of vacuum adsorption tubes, and the plurality of vacuum adsorption tubes are connected to the plurality of vacuum adsorption holes in a one-to-one correspondence.

10. The battery cell injection mold according to claim 6, characterized in that: The cross-sectional area of ​​the glue injection hole is smaller than the cross-sectional area of ​​the vacuum adsorption hole.

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