Continuous casting grid belt structure

Abstract

The present invention relates to the field of battery production and discloses a continuous casting grid belt structure, which is formed by horizontally connecting two rows of multiple grids (1) connected in series. The pole lugs (2) of the two rows of grids (1) connected in series are arranged on the outside of the structure in opposite directions. The grid bottom frames (3) of the two rows of grids (1) connected in series are relatively staggered and horizontally connected on the inside of the structure by staggered connecting blocks (4) that are fed in sequence along the grid coating feeding direction. Compared with the existing technology, the present invention effectively improves product quality and qualified rate by rationally designing the arrangement and connection structure of the grids on the grid belt, thereby achieving cost reduction and efficiency improvement.

Description

Technical Field

[0001] The present invention relates to the field of battery production, and in particular to a continuous casting grid belt structure. Background Art

[0002] The grid is a key component of the battery, carrying the active material and transmitting the current. With the rapid development of science and technology, the traditional semi-mechanized casting grid will gradually be replaced by continuous casting and rolling technology. In most of the current continuous casting and rolling processes, the grid mesh belt consists of two rows of grids 1 connected in series. The tabs 2 of each grid 1 in the two rows of grids 1 are staggered relative to each other on the inner side of the grid mesh belt, such as Figure 1 As shown, the bottom frames 3 of the two rows of grids 2 are arranged on the outside of the grid mesh belt facing each other. This grid mesh belt structure has the following defects:

[0003] (1) When it is necessary to apply lead paste on each grid 1 in the grid mesh belt except for the position of the pole lug 2, since the pole lugs 2 of the two rows of grids 1 are relatively arranged on the inner side of the grid mesh belt, it is inevitable that the lead paste will be squeezed onto each pole lug 2 when applying the lead paste. Once the lead paste sticks to the pole lug 2, it is difficult to brush the pole lug 2 clean, which will seriously affect the welding quality of the grid lug in the subsequent process.

[0004] (2) When the relatively staggered tabs are cut, the connection points between the tabs and the grid frame will always leave some tab residue on the grid frame when they are cut off, which will cause burrs on the grid frame. Subsequently, a very thin battery separator will be wrapped around the outside of the grid. The above-mentioned burrs can easily scratch the battery separator and cause a short circuit between the positive and negative electrodes, affecting product quality and even battery failure. Summary of the Invention

[0005] Purpose of the invention: In response to the problems existing in the prior art, the present invention provides a continuous casting grid belt structure, which effectively improves product quality and pass rate by rationally designing the arrangement and connection structure of the grids on the grid belt, thereby achieving cost reduction and efficiency improvement.

[0006] Technical solution: The present invention provides a continuous casting grid mesh belt structure, which is composed of two rows of multiple grids connected in series horizontally, and the pole ears of the two rows of grids connected in series are arranged back to back on the outside of the structure; the bottoms of the two rows of grids connected in series are relatively staggered, and are horizontally connected to the inside of the structure through staggered connecting blocks that are fed successively along the feeding direction of the grid coating.

[0007] Furthermore, a cutting avoidance groove is provided at the bottom frame of the grid connected to the offset connection block, and the two ends of the offset connection block are respectively connected to the inner walls of the cutting avoidance groove on the two relatively offset bottom frames of the grid. If there is no cutting avoidance groove, when the connection points between the two ends of the cut offset connection block and the bottom frame of the grid are cut off, some residual material of the cut offset connection block will always be left on the bottom frame of the grid, which will cause burrs to be generated on the bottom frame of the grid. Subsequently, a very thin layer of battery separator will be wrapped around the outside of the grid. The burrs of the residual material can easily scratch the battery separator, causing a short circuit of the positive and negative poles inside the battery or even battery failure. The setting of the cutting avoidance groove in the present invention can hide the generated burrs inside the cutting avoidance groove. In this way, when the battery separator is subsequently wrapped around the outside of the grid, the residual material burrs in the cutting avoidance groove will not directly contact the battery separator, which can effectively prevent the quality problem of the battery separator being scratched due to the residual material burrs.

[0008] Furthermore, a convex edge adapted to the cutting avoidance groove is provided inside the grid at a position opposite to the cutting avoidance groove at the bottom frame of the grid. In order to ensure that the width of the bottom frame of the grid remains unchanged, a convex edge is provided inside the grid corresponding to the position of the cutting avoidance groove.

[0009] Preferably, the depth of the cutting avoidance groove is 0.8 mm to 1.2 mm.

[0010] Furthermore, the tabs of the two series-connected grids are connected and fixed by connecting bars. Without the connecting bars, the tabs of the two grids would be suspended in the air, which could easily cause the tabs to deform. In the present invention, the tabs of the two grids are connected by connecting bars, which can act as reinforcement ribs and effectively prevent deformation of the grids or tabs. The connecting bars can be removed during subsequent cutting.

[0011] Preferably, the staggered connection block is a "Z"-shaped structure. This structure allows the cutter to sequentially cut the connection points between the staggered connection block and the upper and lower rows of grids along the grid smear feeding direction. Compared with a straight connection block, this structure effectively prevents the connection block from being stuck between the two cutters after the cutter cuts off the connection points on both sides at the same time, thus affecting the smooth progress of the subsequent cutting process.

[0012] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0013] (1) Arranging the tabs of the two series-connected grids on the outside of the grid mesh belt can effectively prevent the lead paste from being squeezed onto the tabs of the grids on both sides when applying lead paste on the grids.

[0014] (2) The two columns of grids connected in series are staggered and the bottom frames of the two grids arranged opposite to each other are connected by staggered connecting blocks. In this way, when the grid mesh belt is fed along the feeding direction of the grid coating, the cutter first cuts the connection point between the end of the advanced material of the staggered connecting block and the bottom frame of one column of grids, and then cuts the connection point between the end of the rear material of the staggered connecting block and the bottom frame of the other column of grids. Since the two ends of the staggered connecting block and the connection points of the bottom frames of the two columns of grids are not cut at the same time, the defect of the cut connection block being stuck between the two cutting knives due to simultaneous cutting can be effectively avoided, so that subsequent cutting can be carried out smoothly.

[0015] (3) The grid mesh belt structure of the present invention can effectively avoid problems such as grid deformation, carding during slicing, and excess paste on the tabs that occur during the production process, greatly reducing the scrap rate of the grid and improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the continuous casting grid belt structure in the prior art;

[0017] Figure 2 Schematic diagram of the continuous casting grid belt structure in embodiment 1;

[0018] Figure 3 It is an orientation diagram of the smear feeding and rolling cutting mechanism and the continuous casting grid belt structure in embodiment 1;

[0019] Figure 4 for Figure 3 Schematic diagram of the enlarged structure in the middle circle A;

[0020] Figure 5 Schematic diagram of the continuous casting grid belt structure in embodiment 2;

[0021] Figure 6 for Figure 5 Schematic diagram of the enlarged structure in the middle circle A;

[0022] Figure 7 For Figure 6 The diagram of the position of the rolling cutter is added in the figure;

[0023] Figure 8 Schematic diagram of the continuous casting grid belt structure in embodiment 3;

[0024] Figure 9 It is an orientation diagram of the smear feeding rolling cutting mechanism and the continuous casting grid belt structure in embodiment 3. DETAILED DESCRIPTION

[0025] The present invention will be described in detail below with reference to the accompanying drawings.

[0026] Implementation method 1:

[0027] This embodiment provides a continuous casting grid belt structure, such as Figure 2 As shown, it is composed of two rows of multiple grids 1 connected in series horizontally, and the pole ears 2 of the two rows of grids 1 in series are arranged back to back on the outside of the mesh belt structure; the grid bottom frames 3 of the two rows of grids 1 in series are relatively staggered, and are horizontally connected to the inside of the mesh belt structure through the "Z"-shaped staggered connecting blocks 4 that are fed in sequence along the grid coating feeding direction.

[0028] like Figure 3 and 4 As shown, in the continuous casting grid mesh belt structure along the grid coating feeding direction ( Figure 3 In the process of slicing (in the direction indicated by the middle arrow) into the bottom of the rolling cutting mechanism 8, the rolling cutter 801 in the rolling cutting mechanism 8 is used to cut the two columns of series-connected grids 1; the rolling cutter 802 is used to cut the connection points between the staggered connecting blocks 4 and the bottom frame 3 of the grid, and the rolling cutter 802 first cuts the front connection point of the staggered connecting block 4 connected to the bottom frame 3 of the lower grid, and then cuts the rear connection point of the staggered connecting block 4 connected to the bottom frame 3 of the upper grid. The setting of the staggered connecting block 4 can effectively avoid the card problem caused by the connection block being stuck between the two rolling cutters when the grid 1 is cut.

[0029] Implementation 2:

[0030] This embodiment is a further improvement of embodiment 1. The main improvement is that in embodiment 1, when the rolling cutter 802 cuts the connection point between the offset connection block 4 and the bottom frame 3 of the upper and lower grids, some residual material of the cut offset connection block 4 will always be left on the bottom frame 3 of the grid. This will cause burrs on the bottom frame 3 of the grid. Subsequently, a very thin battery separator will be wrapped around the outside of the grid 1. The above-mentioned residual burrs can easily scratch the battery separator, causing a short circuit of the positive and negative poles inside the battery or even battery failure. This embodiment can effectively avoid the above-mentioned defects.

[0031] Specifically, in this embodiment, Figures 5 to 7A cutting avoidance groove 5 with a depth d of 0.8mm to 1.2mm is provided at the position of the bottom frame 3 of the grid connected to the offset connection block 4. A convex edge 6 adapted to the cutting avoidance groove 5 is provided in the interior of the grid at a position opposite to the cutting avoidance groove 5. The two ends of the offset connection block 4 are respectively connected to the inner walls of the cutting avoidance groove 5 on the upper and lower bottom frames 4 of the grid. With this design, when the rolling cutter 802 cuts the connection point between the offset connection block 4 and the upper and lower bottom frames 4 of the grid, the existence of the cutting avoidance groove 5 makes the burrs generated after cutting located in the cutting avoidance groove 5. In this way, when the battery separator is subsequently wrapped around the outside of the grid 1, the excess burrs in the cutting avoidance groove 5 will not directly contact the battery separator, which can effectively prevent the quality problem of the battery separator being scratched due to the excess burrs.

[0032] Apart from this, this embodiment is identical to Embodiment 1 and will not be described in detail here.

[0033] Implementation 3:

[0034] This embodiment is a further improvement of embodiment 2. The main improvement is that in embodiment 1, the tabs 2 of the two series-connected grids 1 are suspended, and the grids 1 or tabs 2 are easily deformed during the process. Figure 8 and 9 The tabs 2 of the two rows of grids 1 connected in series are connected and fixed by connecting strips 7. The setting of the connecting strips 7 is equivalent to adding a reinforcing rib between the tabs 2, which effectively prevents the grids 1 or tabs 2 from deforming. The connecting strips 7 can be cut off using a rolling cutter 803 during subsequent cutting.

[0035] Apart from this, this embodiment is exactly the same as embodiment 2 and will not be described in detail here.

[0036] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit of the present invention are intended to be covered by the scope of protection of the present invention.

Claims

1. A continuous casting grid belt structure, characterized in that: The invention is composed of two rows of multiple grids (1) connected in series horizontally, wherein the pole ears (2) of the two rows of grids (1) are arranged back to back on the outside of the continuous casting grid mesh belt structure; the grid bottom frames (3) of the two rows of grids (1) are relatively staggered and horizontally connected to the inside of the structure through staggered connecting blocks (4) that are fed in sequence along the grid coating feeding direction.

2. The continuous casting grid belt structure according to claim 1, characterized in that: A cutting avoidance groove (5) is provided at the position of the grid bottom frame (3) connected to the staggered connection block (4), and both ends of the staggered connection block (4) are respectively connected to the inner walls of the cutting avoidance groove (5) on the two grid bottom frames (3) that are relatively staggered.

3. The continuous casting grid belt structure according to claim 2, characterized in that: At a position where the bottom frame (3) of the grid is opposite to the cutting avoidance groove (5), a convex edge (6) adapted to the cutting avoidance groove (5) is provided toward the inside of the grid (1).

4. The continuous casting grid belt structure according to claim 2, characterized in that: The depth d of the cutting avoidance groove (5) is 0.8 mm to 1.2 mm.

5. The continuous casting grid belt structure according to any one of claims 1 to 4, characterized in that: The pole tabs (2) of the two rows of grids (1) connected in series are respectively connected and fixed via connecting bars (7).

6. The continuous casting grid belt structure according to any one of claims 1 to 4, characterized in that: The dislocated connection block (4) is a "Z"-shaped structure.

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