Shaping device for side surfaces of square battery cell

Abstract

The utility model relates to a shaping device for the side surface of a square battery cell, which comprises a bottom plate, a front baffle, a rear baffle, a shaping push block, a shaping push block fixing seat and an air cylinder, the front baffle and the rear baffle are vertically and fixedly connected with the bottom plate, guide rails are respectively arranged at the left end and the right end of the bottom plate, a sliding block is arranged at the bottom of the shaping push block, and the sliding block of the shaping push block is in sliding connection with the guide rails of the bottom plate. The shape of the cross section of the shaping push block is a rectangle matched with the side surface of a battery cell, the back surface of the shaping push block is fixedly connected with a vacuum air suction pipe, the surface of the shaping push block is provided with an air suction groove, the air suction groove is communicated with the vacuum air suction pipe, the vacuum air suction pipe is connected with an air pump, and the vacuum air suction pipe is supported on a shaping push block fixing seat; the vacuum air suction pipe at the right shaping push block end is fixedly connected with a cylinder piston through a flange. According to the utility model, a repairing process for shaping the side surface depression of the battery cell is added before the battery cell is enveloped, so that the smooth appearance effect of the side surface of the battery cell can be recovered.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium battery production technology, and in particular relates to a shaping device for the side surface of a square battery core. Background Art

[0002] During the manufacturing process of battery cells, due to the vacuum negative pressure process, the battery cell shell will be deformed by negative pressure, showing a concave state. The existing process of vacuum injection, negative pressure formation and fractional charging and discharging will make the side of the battery cell shell more concave; severely concave batteries will affect the appearance of the film and cause bubbles and other problems; severely concave batteries have the risk of extruding the pole group, affecting electrical performance.

[0003] The patent document with the authorization announcement number CN 213520064 U discloses a battery cell shaping device, including a machine platform, a sliding mechanism, a side shaping mechanism and an end face shaping mechanism. The sliding mechanism includes a slide rail and a supporting platform, and the supporting platform is used to support and heat the battery cell. The side shaping mechanism includes a horizontal driver, a first shaping block and a second shaping block. The second shaping block and the supporting platform form a placement position for placing the battery cell. The first shaping block and the second shaping block are arranged opposite to each other. The first shaping block moves horizontally toward the second shaping block under the drive of the horizontal driver to squeeze the upper end face of the battery cell located in the placement position. The end face shaping mechanism includes a lifting driver and a shaping pressing block. The shaping pressing block descends under the drive of the lifting driver to press on the battery cell located in the placement position. The patent document with authorization announcement number CN 208336394 U discloses a battery module shaping device including: a clamp slidably set on a line guide rail for carrying a battery module, a side shaping device arranged on both sides of the line guide rail for pressing and positioning the side of the battery module, and an upper and lower shaping device for pressing and positioning the pole surface and bottom surface of the battery module. The upper and lower shaping device includes a pole positioning mechanism erected above the clamp for serving as a positioning reference and a first lifting mechanism arranged below the clamp for pushing the battery module to be pressed onto the pole positioning mechanism.

[0004] Lithium battery production urgently needs a shaping device to improve the depression on the side of the battery cell. Utility Model Content

[0005] The utility model aims to overcome the deficiencies in the prior art and provide a shaping device for the side of a square battery cell, so as to reduce or restore the phenomenon of the concave side of the battery cell, make the side of the battery cell reach a relatively flat interface, and improve the negative impact caused by the concave side of the battery cell.

[0006] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical scheme: a shaping device for the side of a square battery cell, comprising a bottom plate and front and rear baffles, a shaping push block, a shaping push block fixing seat and a cylinder, the front and rear baffles are vertically fixed to the bottom plate, the left and right ends of the bottom plate are respectively provided with guide rails, a slider is provided at the bottom of the shaping push block, the slider of the shaping push block is slidably connected to the guide rail of the bottom plate, the cross-sectional shape of the shaping push block is a rectangle matching the side of the battery cell, a vacuum suction pipe is fixedly connected to the back of the shaping push block, a suction groove is provided on the surface of the shaping push block, the suction groove is connected to the vacuum suction pipe, the vacuum suction pipe is connected to an air pump, the vacuum suction pipe is supported on the shaping push block fixing seat, and the vacuum suction pipe at the right shaping push block end is fixedly connected to the cylinder piston through a flange.

[0007] Furthermore, the shaping push block fixing seat, the bottom plate, and the front and rear baffles are respectively fixedly connected to the base platform.

[0008] Furthermore, the guide rail is a dovetail guide rail, and the slider that slidably cooperates with the dovetail guide rail is a dovetail groove slider.

[0009] Furthermore, the suction grooves on the surface of the shaping push block are arranged in a "U" shape to form a concentric rectangular structure, and each suction groove is provided with an exhaust hole, and the exhaust holes are connected to the vacuum suction pipe.

[0010] Furthermore, the air suction groove has a depth of 5-10 mm and a width of 5-10 mm.

[0011] Furthermore, the vacuum suction negative pressure of the shaping push block is -06-1.0Pa.

[0012] Beneficial effect: Compared with the prior art, the utility model adds a repair process for shaping the side depression of the battery cell before the battery cell is coated, which can restore the smooth appearance of the side of the battery cell. The side depression problem of the current square battery cell is optimized and post-processed to reduce the negative impact of the side depression of the battery cell, improve the appearance of the product, reduce the poor appearance of the coating, and optimize the coating pre-treatment process. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model after removing the front baffle;

[0014] Figure 2 yes Figure 1 A top view of a cross section;

[0015] Figure 3 yes Figure 1 The right side cross-sectional view of

[0016] Figure 4 This is the appearance diagram of the battery cell to be repaired.

[0017] In the figure: 1, bottom plate, 2, front baffle, 3, rear baffle, 4, shaping push block, 4-1, guide rail pair, 4-2, vacuum suction pipe, 4-3, suction groove, 5, shaping push block fixing seat, 5-1, exhaust hole, 6, cylinder, 7, base platform, 8, battery cell to be repaired. DETAILED DESCRIPTION

[0018] The following is a detailed description of the specific implementation method provided by the utility model in combination with the preferred embodiment: See the accompanying drawings for details. This embodiment provides a shaping device for the side of a square battery cell, including a base plate 1 and front and rear baffles 2, 3, a shaping push block 4, a shaping push block fixing seat 5 and a cylinder 6. The front and rear baffles are vertically fixed to the base plate, and guide rails are respectively provided at the left and right ends of the base plate. A slider is provided at the bottom of the shaping push block. The slider of the shaping push block is slidably connected to the guide rail of the base plate to form a guide rail pair 4-1. The cross-sectional shape of the shaping push block is a rectangle matching the side of the battery cell. A vacuum suction pipe 4-2 is fixedly connected to the back of the shaping push block, and an suction groove 4-3 is provided on the surface of the shaping push block. The suction groove is connected to the vacuum suction pipe, and the vacuum suction pipe is connected to an air pump. The vacuum suction pipe is supported on the shaping push block fixing seat, and the vacuum suction pipe at the right shaping push block end is fixed to the cylinder piston through a flange. In this embodiment, a small exhaust hole 5-1 is vertically arranged on the fixing seat of the right shaping push block, and the vertical exhaust hole is connected to the vacuum suction pipe at the end of the right shaping push block.

[0019] The preferred solution of this embodiment is that the shaping push block fixing seat, the bottom plate and the front and rear baffles are respectively fixed to the base platform 7.

[0020] A preferred solution of this embodiment is that the guide rail adopts a dovetail guide rail, and the slider that slides with the dovetail guide rail adopts a dovetail groove slider.

[0021] The preferred solution of this embodiment is that the suction grooves on the surface of the shaping push block are arranged in a "U" shape to form a concentric rectangular structure, and each suction groove is provided with an exhaust hole, and the exhaust holes are connected to the vacuum suction pipe.

[0022] A preferred solution of this embodiment is that the air suction groove has a depth of 5-10 mm and a width of 5-10 mm.

[0023] The preferred solution of this embodiment is that the vacuum suction negative pressure of the shaping push block is -06-1.0Pa.

[0024] Working principle and working process

[0025] This embodiment takes a conventional square battery cell as an example

[0026] Battery film thickness: 71.5±0.5mm

[0027] Battery width 173.8±0.5mm

[0028] Battery shoulder height 204.7±0.5mm

[0029] Battery pole height 207.2±0.5mm

[0030] The utility model uses the principle of negative pressure depression suction to repair the depression of the side wall of the battery core.

[0031] 1. Fix the left shaping push block, connect the vacuum suction pipe to the air pump, push the right shaping push block through the cylinder piston, and reserve a gap of 0.1-0.2mm according to the width of the battery cell;

[0032] 2. Place the battery cell 8 to be repaired between the front and rear baffles and the left and right shaping push blocks, and seal the sides of the battery cell tightly;

[0033] 3. Turn on the air pump, the vacuum suction negative pressure is -06-1.0Pa, and maintain the pressure for a certain time of 30-50s;

[0034] 4. Make the concave part on the side of the battery cell fully vacuum-leveled;

[0035] 5. Turn off the vacuum air pressure, return the right shaping push block through the cylinder, take out the battery cell, and complete the shaping process.

[0036] The detailed description of the above-mentioned embodiment with reference to the embodiment is illustrative rather than restrictive, and several embodiments can be listed according to the limited scope. Therefore, changes and modifications without departing from the overall concept of the utility model should fall within the scope of protection of the utility model.

Claims

1. A device for shaping the side of a square battery cell, characterized in that: It includes a bottom plate and front and rear baffles, a shaping push block, a shaping push block fixing seat and a cylinder, the front and rear baffles are vertically fixed to the bottom plate, the left and right ends of the bottom plate are respectively provided with guide rails, a slider is provided at the bottom of the shaping push block, the slider of the shaping push block is slidably connected to the guide rails of the bottom plate, the cross-sectional shape of the shaping push block is a rectangle matching the side of the battery cell, a vacuum suction pipe is fixedly connected to the back of the shaping push block, a suction groove is provided on the surface of the shaping push block, the suction groove is connected to the vacuum suction pipe, the vacuum suction pipe is connected to an air pump, the vacuum suction pipe is supported on the shaping push block fixing seat, and the vacuum suction pipe at the right shaping push block end is fixedly connected to the cylinder piston through a flange.

2. The device for shaping the side of a square battery cell according to claim 1, characterized in that: The shaping push block fixing seat, the bottom plate, and the front and rear baffles are respectively fixedly connected to the base platform.

3. The device for shaping the side of a square battery cell according to claim 1, characterized in that: The guide rail adopts a dovetail guide rail, and the slider that slides with the dovetail guide rail adopts a dovetail groove slider.

4. The device for shaping the side of a square battery cell according to claim 1, characterized in that: The air suction grooves on the surface of the shaping push block are arranged in a "U" shape to form a concentric rectangular structure, and each air suction groove is provided with an exhaust hole, and the exhaust holes are connected to the vacuum suction pipe.

5. The device for shaping the side of a square battery cell according to claim 1 or 4, characterized in that: The air suction groove has a depth of 5-10 mm and a width of 5-10 mm.

6. The device for shaping the side of a square battery cell according to claim 1, characterized in that: The vacuum suction negative pressure of the shaping push block is -06-1.0Pa.

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