CN211556053U - A bootstrap lithium battery cell hot pressing device - Google Patents

Abstract

A self-lifting type lithium battery cell hot pressing device, the utility model relates to the technical field of battery production equipment; the four corners of the upper surface of the bottom fixing plate are fixedly connected with guiding and fixing columns, and the upper end of the guiding and fixing columns is connected with the top fixing plate. The lower surface is connected and fixed, a pressure plate is arranged between the top fixed plate and the bottom fixed plate, and guide sleeves are embedded and fixed around the pressure plate, and the guide sleeves are sleeved on the guide and fixed columns; After the bottom pushing end of the cylinder assembly passes through the top fixing plate, the electric cylinder connection block is fixedly connected, the pressure sensor mounting plate is fixedly connected to the pressure plate, the pressure sensor is fixedly connected to the pressure sensor mounting plate, the left load-bearing fixing block and the right load-bearing fixing plate are fixedly connected. The blocks are fixed on the pressure plate; the crescent-shaped spring plate is used to not exert force on the side of the battery cell, which avoids the force applied to the thickness direction of the battery cell during the process of manipulator pocket clipping, and improves the flatness of the battery cell, thereby improving the quality of the battery.

Description

A bootstrap lithium battery cell hot pressing device

technical field

The utility model relates to the technical field of battery production equipment, in particular to a self-lifting type lithium battery cell hot pressing device.

Background technique

The battery is composed of a battery cell, a protection circuit, and a casing. The quality of the battery cell directly determines the quality of the battery. During the battery production process, the positive and negative electrode pieces and the diaphragm are assembled and manufactured into a basic battery cell in the process of winding or lamination. In this process, whether it is winding or lamination, a certain tension must be applied to the separator to ensure the orderliness between the positive electrode, the separator and the negative electrode. However, the tension in the process will cause the separator to move in the tape direction Being elongated, the diaphragm shrinks greatly in the direction of tape travel, which will cause the diaphragm to severely squeeze the pole piece, which will lead to the deformation of the battery cell after the cell assembly process, especially the winding process, and the deformed cell not only has appearance The flatness is poor, and there are defects such as diaphragm wrinkles inside, which will lead to problems such as low battery capacity, poor cycle performance and fast self-discharge.

The hot-pressing process is required to ensure the flatness of the cell, keep the thickness of the cell consistent, eliminate the wrinkles of the diaphragm, drive away the air inside the cell, make the diaphragm and the positive and negative pole pieces close together, shorten the diffusion distance of lithium ions, and reduce the battery Internal resistance; in the prior art, the battery pocket is placed on the hot pressing plate by the manipulator before the hot pressing of the battery cell, and after the hot pressing is completed, the battery is transported away by the manipulator. The application of force in the direction can easily cause the pole piece to shift and the diaphragm to wrinkle, resulting in a serious deterioration of the battery quality.

Utility model content

The purpose of this utility model is to aim at the defects and deficiencies of the prior art, to provide a self-lifting lithium battery cell hot pressing device with a reasonable design, which uses the crescent-shaped spring plate not to exert force on the side of the cell, and avoids the pocket of the manipulator. The clamping process exerts force on the thickness direction of the cell, which improves the flatness of the cell, thereby improving the quality of the battery.

In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: it includes a cell pressing mechanism, an upper pressing plate mechanism, and a lower pressing plate mechanism, and the cell pressing mechanism is sequentially provided with an upper pressing plate mechanism and a lower pressing plate mechanism from top to bottom. ;

The cell pressing mechanism includes a bottom fixed plate, a guide fixed column, a top fixed plate, a guide sleeve, a pressure plate, a limit ring, an electric cylinder assembly, a pressure sensor mounting plate, a pressure sensor, a left bearing fixing block, and a right bearing fixing block. The four corners of the bottom fixing plate are fixedly connected with guide fixing columns, the upper ends of the guiding fixing columns are connected and fixed with the lower surface of the top fixing plate, and a pressure plate is arranged between the top fixing plate and the bottom fixing plate. , there are guide sleeves embedded and fixed around the pressure plate, the guide sleeves are sleeved on the guide fixed column, the bottom end of the guide fixed column is sleeved with a fixed limit ring, and the bottom end of the limit ring is fixed on the bottom fixed plate; the top fixed plate The electric cylinder assembly is fixedly connected to the upper part, and the bottom pushing end of the electric cylinder assembly passes through the top fixing plate and is arranged on the lower side of the top fixing plate. The electric cylinder connecting block is fixedly connected to the bottom pushing end of the electric cylinder assembly, and the pressure plate is fixed A pressure sensor mounting plate is connected, the pressure sensor mounting plate is fixedly connected with a pressure sensor, the pressure sensor is arranged on the lower side of the electric cylinder connection block, and the left and right load-bearing fixing blocks are respectively provided on the left and right sides of the pressure sensor mounting plate. , the left load-bearing fixing block and the right load-bearing fixing block are both fixed on the pressure plate, the upper ends of the left and right load-bearing fixing blocks are arranged on the outside of the electric cylinder connecting block, and the left and right load-bearing fixing blocks are connected to the electric cylinder. The cylinder connection block is connected and fixed, and the electric cylinder assembly is connected with the external power supply;

The upper pressing plate mechanism includes an upper cell contact plate, an upper heating plate assembly, and an upper heat insulation plate. The bottom of the component is fixedly connected with the upper cell contact board;

The lower pressing plate mechanism includes a lower heat insulating plate, a lower heating plate assembly, a lower cell contact plate, a crescent spring plate, and a pressing sheet. The lower heat insulating plate is fixed on the bottom fixing plate, and the lower heat insulating plate is fixedly connected with a The lower heating plate assembly, the lower heating plate assembly is fixedly connected with the lower cell contact plate, the lower cell contact plate is provided with a groove, the crescent-shaped spring plate is arranged in the groove, and the upper ends of the left and right sides of the crescent-shaped spring plate are both. A pressing piece is provided, and the pressing piece is fixed on the contact plate of the lower cell.

Further, the upper end of the limit ring is provided with a buffer washer, and the buffer washer is sleeved on the guide and fixed column.

Further, both the upper heating plate assembly and the lower heating plate assembly are provided with heating pipes.

After the above structure is adopted, the beneficial effects of the present invention are: the self-lifting type lithium battery cell hot pressing device described in the present utility model utilizes the crescent-shaped spring plate not to exert force on the side of the cell, thereby avoiding manipulators The pocket clipping process exerts force on the thickness direction of the cell, which improves the flatness of the cell, thereby improving the quality of the battery.

Description of drawings:

Figure 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic structural diagram of a cell pressing mechanism in the present invention.

FIG. 3 is a schematic structural diagram of the upper pressing plate mechanism in the present invention.

FIG. 4 is a schematic structural diagram of a lower pressing plate mechanism in the present invention.

Description of reference numbers:

Cell pressing mechanism 1, bottom fixing plate 1-1, guide fixing column 1-2, guide sleeve 1-3, pressure plate 1-4, limit ring 1-5, electric cylinder assembly 1-6, pressure sensor mounting plate 1-7, pressure sensor 1-8, left load-bearing fixing block 1-9, right load-bearing fixing block 1-10, electric cylinder connection block 1-11, top fixing plate 1-12, upper platen mechanism 2, upper cell contact Plate 2-1, upper heating plate assembly 2-2, upper heat insulation plate 2-3, lower pressing plate mechanism 3, lower heat insulation plate 3-1, lower heating plate assembly 3-2, lower cell contact plate 3-3 , Crescent spring plate 3-4, pressing piece 3-5, groove 3-6, battery 4, buffer gasket 5.

Detailed ways:

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

As shown in Figures 1-4, this specific embodiment adopts the following technical solutions: it includes a cell pressing mechanism 1, an upper pressing plate mechanism 2, and a lower pressing plate mechanism 3, and the cell pressing mechanism 1 is arranged in sequence from top to bottom There are upper platen mechanism 2 and lower platen mechanism 3;

The cell pressing mechanism 1 includes a bottom fixing plate 1-1, a guide fixing column 1-2, a top fixing plate 1-12, a guide sleeve 1-3, a pressure plate 1-4, a limit ring 1-5, an electric Cylinder assembly 1-6, pressure sensor mounting plate 1-7, pressure sensor 1-8, left bearing fixing block 1-9, right bearing fixing block 1-10, electric cylinder connecting block 1-11, bottom fixing plate 1-1 The four corners of the upper surface are welded and fixed with guide fixing columns 1-2. The upper end of the guide fixing column 1-2 is welded and fixed with the lower surface of the top fixing plate 1-12. The top fixing plate 1-12 and the bottom fixing plate 1-1 are fixed by welding. A pressure plate 1-4 is arranged between, and a guide sleeve 1-3 is embedded and fixed around the pressure plate 1-4. The guide sleeve 1-3 is sleeved on the guide fixed column 1-2, and the bottom of the guide fixed column 1-2 is A limit ring 1-5 is set at the end, the bottom end of the limit ring 1-5 is welded and fixed on the bottom fixing plate 1-1, the upper end of the limit ring 1-5 is provided with a buffer gasket 5, and the buffer gasket 5 The electric cylinder assembly 1-6 is fixed on the top fixing plate 1-12 with screws. After the bottom pushing end of the electric cylinder assembly 1-6 passes through the top fixing plate 1-12, set On the lower side of the top fixing plate 1-12, the electric cylinder connecting block 1-11 is welded and fixed on the bottom pushing end of the electric cylinder assembly 1-6, and the pressure sensor mounting plate 1-7 is fixed on the pressure plate 1-4 with screws. Pressure sensors 1-8 are fixed on the pressure sensor mounting plate 1-7 with screws, the pressure sensors 1-8 are arranged on the lower side of the electric cylinder connecting block 1-11, and the left and right sides of the pressure sensor mounting plate 1-7 are respectively provided with The left load-bearing fixed block 1-9, the right load-bearing fixed block 1-10, the left load-bearing fixed block 1-9 and the right load-bearing fixed block 1-10 are all fixed on the pressure plate 1-4 with screws, and the left load-bearing fixed block 1-9 and The upper ends of the right load-bearing fixing block 1-10 are all arranged on the outside of the electric cylinder connecting block 1-11, and the left load-bearing fixing block 1-9 and the right load-bearing fixing block 1-10 are both fixed with the electric cylinder connecting block 1-11 by screws. , the electric cylinder components 1-6 are connected to the external power supply through the power cord;

The upper platen mechanism 2 includes an upper cell contact plate 2-1, an upper heating plate assembly 2-2, and an upper heat insulation plate 2-3. The upper heat insulation plate 2-3 is fixed to the bottom of the pressure plate 1-4 by screws. , the bottom of the upper heat insulation plate 2-3 is fixed with the upper heating plate assembly 2-2 by screws, the upper heating plate assembly 2-2 is provided with a heating pipe, and the bottom of the upper heating plate assembly 2-2 is fixed with screws Core contact plate 2-1;

The lower pressing plate mechanism 3 includes a lower heat insulation plate 3-1, a lower heating plate assembly 3-2, a lower cell contact plate 3-3, a crescent spring plate 3-4, a pressing sheet 3-5, and a lower heat insulation plate. The plate 3-1 is fixed on the bottom fixing plate 1-1 with screws, and the lower heat shield assembly 3-2 is fixed with screws on the lower heat insulation plate 3-1. A lower cell contact plate 3-3 is fixed on the heating plate assembly 3-2 with screws, a groove 3-6 is formed on the lower cell contact plate 3-3, and a crescent spring plate 3-4 is arranged in the groove 3- 6, the upper ends of the left and right sides of the crescent-shaped spring plate 3-4 are provided with pressing pieces 3-5, and the pressing pieces 3-5 are fixed on the lower cell contact plate 3-3 by screws.

The working principle of this specific embodiment: when the device is used, the cell 4 is placed on the crescent spring plate 3-4, and is driven downward by the electric cylinder assembly 1-6 of the cell pressing mechanism 1 to drive the pressing plate 1- 4 is driven downward, so that the upper pressing plate mechanism 2 is driven downward, so that the upper battery contact plate 2-1 drives the battery 4 to drive downward. When the battery 4 is pressed downward, it drives the crescent moon. The contact part between the type spring plate 3-4 and the battery core 4 is called an integral plane, and the bottom of the battery core 4 is in contact with the lower battery core contact plate 3-3. Hot pressing, thereby improving the quality of the battery. When the electric cylinder assembly 1-6 drives the electric cylinder connecting block 1-11 to push, it drives the left load-bearing fixing block 1-9 and the right load-bearing fixing block 1-10 to push, thereby driving the pressure plate. 1-4 is pushed, and the pressure plate 1-4 is pushed through the sliding cooperation of the guide sleeve 1-3 and the guide fixed column 1-2 to guide the operation, so that the pressure plate 1-4 is more stable during the pushing process, and the upper pressure plate mechanism 2 is improved. The stability of the push improves the flatness of the hot pressing of the battery cell 4, thereby improving the quality of the battery.

After the above structure is adopted, the beneficial effects of this specific embodiment are as follows: the self-lifting lithium battery cell hot pressing device described in this specific embodiment uses the crescent-shaped spring plates 3-4 to prevent the side edge of the cell 4 from being generated. The force is applied to avoid the force applied to the thickness direction of the battery cell 4 during the pocket clipping process of the manipulator, thereby improving the flatness of the battery core 4 and improving the quality of the battery.

Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Within the spirit and principle of the present utility model, any modifications, equivalent replacements, improvements, etc. made shall be included within the protection scope of the present utility model.

Claims (3)

1. A self-lifting lithium battery cell hot pressing device is characterized in that: it comprises a cell pressing mechanism (1), an upper pressing plate mechanism (2), a lower pressing plate mechanism (3), and a cell pressing mechanism (1) An upper pressing plate mechanism (2) and a lower pressing plate mechanism (3) are arranged in sequence from top to bottom; The cell pressing mechanism (1) comprises a bottom fixing plate (1-1), a guiding fixing column (1-2), a top fixing plate (1-12), a guiding sleeve (1-3), and a pressing plate (1) -4), limit ring (1-5), electric cylinder assembly (1-6), pressure sensor mounting plate (1-7), pressure sensor (1-8), left load-bearing fixing block (1-9), The right load-bearing fixing block (1-10), the electric cylinder connecting block (1-11), and the four corners of the upper surface of the bottom fixing plate (1-1) are fixedly connected with guide fixing posts (1-2). The upper end of 1-2) is connected and fixed with the lower surface of the top fixing plate (1-12), and a pressure plate (1-4) is arranged between the top fixing plate (1-12) and the bottom fixing plate (1-1). Guide sleeves (1-3) are embedded and fixed around (1-4), the guide sleeves (1-3) are sleeved on the guide and fixed columns (1-2), and the bottom of the guide and fixed columns (1-2) The end is sleeved with a fixed limit ring (1-5), and the bottom end of the limit ring (1-5) is fixed on the bottom fixed plate (1-1); the top fixed plate (1-12) is fixedly connected with an electric cylinder The assembly (1-6), after the bottom push end of the electric cylinder assembly (1-6) passes through the top fixing plate (1-12), is arranged on the lower side of the top fixing plate (1-12), and the electric cylinder assembly (1-12) -6) An electric cylinder connecting block (1-11) is fixedly connected to the bottom push end, and a pressure sensor mounting plate (1-7) and a pressure sensor mounting plate (1-7) are fixedly connected to the pressure plate (1-4). A pressure sensor (1-8) is fixedly connected to the upper part, the pressure sensor (1-8) is arranged on the lower side of the electric cylinder connecting block (1-11), and the left and right sides of the pressure sensor mounting plate (1-7) are respectively arranged with The left load-bearing fixing block (1-9), the right load-bearing fixing block (1-10), the left load-bearing fixing block (1-9) and the right load-bearing fixing block (1-10) are all fixed on the pressure plate (1-4), The upper ends of the left load-bearing fixing block (1-9) and the right load-bearing fixing block (1-10) are arranged on the outside of the electric cylinder connecting block (1-11), and the left load-bearing fixing block (1-9) and the right load-bearing fixing block The blocks (1-10) are connected and fixed with the electric cylinder connecting block (1-11), and the electric cylinder assembly (1-6) is connected with the external power supply; The upper pressing plate mechanism (2) comprises an upper cell contact plate (2-1), an upper heating plate assembly (2-2), an upper heat insulating plate (2-3), and an upper heat insulating plate (2-3) It is fixed on the bottom of the pressing plate (1-4), the bottom of the upper heat insulating plate (2-3) is fixedly connected with the upper heating plate assembly (2-2), and the bottom of the upper heating plate assembly (2-2) is fixedly connected with the upper heating plate assembly (2-2). Cell contact board (2-1); The lower pressing plate mechanism (3) comprises a lower heat insulation plate (3-1), a lower heating plate assembly (3-2), a lower cell contact plate (3-3), and a crescent-shaped spring plate (3-4) , pressing sheet (3-5), the lower heat insulation plate (3-1) is fixed on the bottom fixing plate (1-1), and the lower heat insulation plate (3-1) is fixedly connected with the lower heating plate assembly (3- 2), the lower heating plate assembly (3-2) is fixedly connected with the lower cell contact plate (3-3), and the lower cell contact plate (3-3) is provided with a groove (3-6), a crescent-shaped The spring plate (3-4) is arranged in the groove (3-6), the upper ends of the left and right sides of the crescent spring plate (3-4) are provided with pressing pieces (3-5), and the pressing pieces (3-5) Fixed on the lower cell contact board (3-3). 2. A self-lifting lithium battery cell hot pressing device according to claim 1, characterized in that: the upper end of the limit ring (1-5) is provided with a buffer gasket (5), the buffer The gasket (5) is sleeved on the guide and fixed column (1-2). 3. A self-lifting lithium battery cell hot pressing device according to claim 1, characterized in that: the upper heating plate assembly (2-2) and the lower heating plate assembly (3-2) are inside All are equipped with heating pipes.

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