Tab cutting unit in li-ion battery pouch type cell modules

Abstract

The invention relates to tab cutting unit (1) in li-ion battery pouch-type cell modules which comprises, within its structure, each of which can move independently of each other in the axis perpendicular to the conveyor, to be positioned one or more in the production line, a cutter group (1.1) that performs tab cutting; guides (1.3) that allow the cutter group (1.1) to cut according to the desired size in the designed lines; unit motion module (1.7) which performs the movement of the tab cutting unit (1); linear rail-car module (1.4), which ensures the accuracy of the movement performed by the unit motion module (1.7) and reduces friction; insulated chassis connection (1.5), which ensures the connection of the tab cutting unit (1) to the chassis; the insulation member (1.2) around the cutter group (1.1) which ensures insulation and a smooth cut; referencing module (1.6) for referencing the battery fixture.

Description

[0001] TAB CUTTING UNIT IN LI-ION BATTERY POUCH TYPE CELL MODULES

[0002] Technical Field:

[0003] This invention relates to a tab cutting unit in li-ion battery pouch type cell modules.

[0004] State of the Art:

[0005] Batteries are devices that allow electrical energy to be stored and used when needed.

[0006] Lithium-ion batteries, or li-ion batteries for short, are fast-recharging batteries. Li-ion batteries provide a significant amount of power for a long time for their size and weight .

[0007] In contrast, li-ion batteries have significantly lower carbon emissions and toxic values than other battery types.

[0008] Due to said features, li-ion batteries are used in many electronic devices, especially tablets and cell phones.

[0009] Today, li-ion batteries are also used in hybrid vehicles and electric vehicles, of which use increases.

[0010] Li-ion batteries are currently classified into three types: cylinder-type li-ion batteries, prism-type li-ion batteries, and sachet-type li-ion batteries.

[0011] In order to prepare the anode-cathode tabs in Li-Ion battery pouch-type cells for the module / pack assembly process in the mass production assembly line , they must be cut smoothly within the desired tolerance si ze .

[0012] However, the cutting process described in previous methods is not integrated into the automation system . This prevents the production line from operating rapidly .

[0013] On the other hand, the existing systems are reali zed under the constant supervision and control of the staf f , depending on the operation staf f .

[0014] The fact that the existing methods are not integrated into automation and are operator-dependent both slows down the production process and causes an increase in the margin of error in practice .

[0015] The Object of the Invention :

[0016] The invention aims the following by providing fast and ef ficient mass production by creating a tab cutting unit suitable for mass production line and integrated into the automation system;

[0017] - ensuring fast and ef ficient mass production,

[0018] - allowing fast feeding to the mas s production assembly line with low cycle times ,

[0019] - providing the ability to work independently from the operator without the need for constant supervision,

[0020] - increasing product yield by minimi zing the margin of error .

[0021] Description of The Figures

[0022] Figure 1 . Front perspective view of the double tab cutting unit , Figure 2. Rear perspective view of the double tab cutting unit,

[0023] Figure 3. Front view of the double tab cutting unit,

[0024] Figure 4. Side view of the tab cutting unit,

[0025] Figure 5. View of the quadruple tab cutting unit,

[0026] Reference Numbers:

[0027] 1. Tab cutting unit

[0028] 1.1. Cutter group

[0029] 1.1.1. Fixed cutter group

[0030] 1.1.2. Movable cutter group

[0031] 1.2. Insulation member

[0032] 1.3. Guide

[0033] 1.4. Rail-car module

[0034] 1.5. Chassis connection

[0035] 1.6. Referencing module

[0036] 1.7. Unit motion module

[0037] Description of the Invention:

[0038] The tab cutting unit (1) in li-ion battery pouch-type cell modules of the invention comprises, within its structure, each of which can move independently of each other in the axis perpendicular to the conveyor, to be positioned one or more in the production line, a cutter group (1.1) that performs tab cutting; guides (1.3) that allow the cutter group (1.1) to cut according to the desired size in the designed lines; unit motion module (1.7) which performs the movement of the tab cutting unit (1) ; linear rail-car module (1.4) , which ensures the accuracy of the movement performed by the unit motion module (1.7) and reduces friction; insulated chassis connection (1.5) , which ensures the connection of the tab cutting unit (1) to the chassis; the insulation member (1.2) around the cutter group (1.1) which ensures insulation and a smooth cut; referencing module (1.6) for referencing the battery fixture.

[0039] Depending on the capacity and process load, the desired number of tab cutting units (1) can be positioned on the production line. Tab cutting units (1) are positioned on both sides of the mass production automation assembly conveyor in the production line. Thus, the cell tabs are cut with double tab cutting units (1) .

[0040] In an example of our invention, as shown in Figure 5, a total of four-tab cutting units (1) can be formed, two of which are positioned on the right side of the production line and two of which are positioned on the left side of the production line.

[0041] Each of the aforementioned tab cutting units (1) can move independently of one another in the direction perpendicular to the conveyor.

[0042] The unit motion module (1.7) controls the movement of the tab cutting units (1) . In our invention, pneumatic cylinders serve as the unit motion module (1.7) .

[0043] The accuracy of the movement provided by the unit motion module (1.7) is provided by the rail-car module (1.4) . On the other hand, the rail-car module (1.4) reduces movement-induced friction. The rail-car module (1.4) of the inventive tab cutting unit (1) is made up of a linear rail and carriage.

[0044] In the conveyor, the moving battery cells are stopped in the fixture at the desired position using a stopper for the cutting process. The cutter group (1.1) performs the cutting movement according to the desired size in the designed guides (1.3) .

[0045] The cutter group (1.1) comprises a fixed cutter group (1.1.1) with a fixed position and a movable cutter group (1.1.2) with the ability to move.

[0046] The movement of the movable cutter group (1.1.2) is performed by pneumatic cylinders. The movable cutter group (1.1.2) is produced to be resistant to abrasion by using high-resistance material .

[0047] The movable cutter group (1.1.2) performs the cutting process by leaving enough space to work in the air gap with the fixed cutter group (1.1.1) located at the bottom of the tab cutting unit (1) , that is, through calculating the gap in percentages of a millimeter.

[0048] The unit motion module (1.7) ensures that the entire tab cutting unit (1) can be inserted into the product and cut in the proper positions.

[0049] Since they contain aluminum and copper, tabs are creeping materials. The cutter group (1.1) was specifically designed with these tab properties in mind.

[0050] An insulating material coating protects the chassis connection (1.5) of the tab cutting unit (1) , preventing short circuits during the cutting process.

[0051] In addition, there is an insulation member (1.2) next to and above the cutting edges. In this way, the insulation is improved, and it is ensured that the cutting takes place properly. Cestamite material was used as insulation member (1.2) .

[0052] The referencing module (1.6) , which is located in front of the tab cutting unit (1) facilitates the referencing of the battery fixture and enables mass production. The referencing module (1.6) is made of a wheeled structure with mobility.

[0053] Thanks to the aforementioned features, the tab cutting unit (1) offers high precision and durability for tabs, in addition to a reliable cutting process for aluminum and copper tabs.

Claims

CLAIMS1. The invention is a tab cutting unit (1) in the li-ion battery pouch-type cell modules, characterized in that it comprises, within its structure, each of which can move independently of each other in the axis perpendicular to the conveyor, to be positioned one or more in the production line, a cutter group (1.1) that performs tab cutting; guides (1.3) that allow the cutter group (1.1) to cut according to the desired size in the designed lines; unit motion module (1.7) which performs the movement of the tab cutting unit (1) ; linear rail-car module (1.4) , which ensures the accuracy of the movement performed by the unit motion module (1.7) and reduces friction; insulated chassis connection (1.5) , which ensures the connection of the tab cutting unit (1) to the chassis; insulation member (1.2) around the cutter group (1.1) which ensures insulation and a smooth cut; referencing module (1.6) for referencing the battery fixture .

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