Multi-tab battery core foil cutting baffle

Abstract

The utility model relates to the technical field of multi-tab battery core foil cutting baffles, in particular to a multi-tab battery core foil cutting baffle which comprises a base, the top of the base is provided with an abutting portion and an installation groove, the installation groove is provided with a fixing plate and a lower cutter, and the fixing plate is provided with an upper cutter and a lower cutter. A pair of baffles is detachably connected between the fixing plate and the lower cutter through a fixing assembly, and the baffles are used for preventing chippings from entering the battery cell; wherein the lower cutter is matched with the upper blade to cut a tab, and the baffle isolates a propagation path, so that metal chips generated during cutting after pre-welding are simply and effectively prevented from directly entering a battery cell main body and the interior of the battery cell main body, and the thin upper edge arc-shaped baffle design is provided; the problem that the battery cell is abnormal due to the fact that the baffle interferes with the diaphragm and the battery cell body is solved, and in addition, in consideration of the aging damage condition of the baffle after long-time use, the baffle can be quickly disassembled and assembled through the fixing assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production and processing, in particular to a cutting baffle for a multi-tab battery foil. Background Art

[0002] After the welding process completes the pre-welding of the multi-layer foil tabs, the tabs need to be cut to a certain size to ensure the consistency of the tab height, thereby ensuring the stability of the size of the entire bare battery cell.

[0003] The traditional cutting knife frame design will produce more or less foil debris during the cutting process. Therefore, a multi-tab battery cell foil cutting baffle is proposed to separate the debris. For example, the prior art Chinese patent announcement number "CN218555762U" discloses a tab cutting device, including an upper cutter assembly and a lower cutter assembly. The upper cutter assembly includes a lifting plate, an upper cutting blade and a lifting drive. The upper cutting blade is arranged on the lifting plate, and the lifting drive is connected to the lifting plate. The upper cutting blade is provided with a cutting bevel; the lower cutter assembly includes a fixed plate and a lower cutting blade. The fixed plate is arranged below the lifting plate, and the lower cutting blade is arranged on the fixed plate. The lower cutting blade is provided with a cutting plane, and the lifting drive is used to drive the lifting plate to perform a lifting movement on one side of the fixed plate to make the upper cutting blade fit or separate from the lower cutting blade. The tab cutting device of the present invention is provided with an upper cutting blade assembly and a lower cutting blade assembly, so that the tabs of the lithium battery pack can be cut by the upper cutting blade and the lower cutting blade, thereby replacing the manual cutting method and improving the production efficiency.

[0004] In actual operation, because the metal debris generated by cutting is mainly concentrated on the back of the cutting knife, and the lower knife is close to the battery body during cutting, there is a chance that the debris will enter the battery cell and its interior under extrusion and vibration. Since there are no measures to prevent the debris from entering the battery cell, the battery cell will be damaged by the debris. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the prior art that there is no measure to block debris from entering the battery core, which may cause damage to the battery core due to debris, and to propose a multi-tab battery core foil cutting baffle.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A multi-tab battery cell foil cutting baffle is designed, comprising a base, a top of the base having an abutment portion and a mounting slot, a fixing plate and a lower cutter provided on the mounting slot, and a pair of baffles detachably connected between the fixing plate and the lower cutter via a fixing assembly, the baffles being used to prevent debris from entering the battery cell;

[0008] Wherein, the lower cutter cooperates with the upper blade to cut the tab.

[0009] Furthermore, the end surface of the mounting groove has a pair of positioning protrusions, and the side thereof facing away from the abutting portion is recessed downward to form a step portion, and the fixing plate and the lower cutting knife are respectively fixed to the step portion and the abutting portion by fasteners.

[0010] Furthermore, the top of the baffle is bent into an arc shape toward the side of the lower cutter to avoid interference between the baffle and the diaphragm. The baffle is slidably connected between the fixed plate and the lower cutter and contacts the positioning protrusion.

[0011] Furthermore, the fixing assembly includes a receiving groove and an unlocking rod. The receiving groove is provided on the side of the fixing plate close to the baffle, and a support portion is provided on the inner wall of the receiving groove. A guide portion is provided at one end of the unlocking rod, and it is slidably connected to the support portion through a spring.

[0012] Furthermore, a stop block is slidably connected to the side of the accommodating groove, and the stop block contacts and slides with the guide portion, wherein a through slot is opened on the side of the baffle, and the stop block is inserted into the through slot.

[0013] Furthermore, both sides of the stop block are provided with guiding inclined surfaces, and the stop block contacts and slides with the guide portion and the through groove through the guiding inclined surfaces.

[0014] The utility model proposes a multi-electrode battery cell foil cutting baffle, which has the beneficial effect of: the utility model adopts the baffle to isolate the transmission path, simply and effectively blocking the metal debris generated during cutting after pre-welding from directly entering the battery cell body and interior, and proposes a thin upper arc-shaped baffle design to solve the problem of abnormal charging of the battery cell caused by interference between the baffle and the diaphragm and the battery cell body. In addition, considering the aging and damage of the baffle due to long-term use, the baffle can be quickly disassembled and assembled through the fixing assembly to avoid affecting the normal production of lithium batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 It is a cross-sectional view of the utility model;

[0017] Figure 3 It is an enlarged cross-sectional view of the fixing assembly of the present invention;

[0018] Figure 4 for Figure 3 Schematic diagram of the enlarged structure of area A.

[0019] In the figure: 1. Base; 11. Abutment portion; 12. Mounting groove; 13. Positioning protrusion; 14. Step portion; 2. Fixing plate; 3. Lower cutter; 4. Fixing assembly; 41. Receiving groove; 42. Unlocking lever; 43. Guide portion; 44. Spring; 45. Abutment block; 5. Baffle; 51. Through groove. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] Reference Figure 1-4 A multi-electrode tab battery foil cutting baffle comprises a base 1, the top of the base 1 has an abutment portion 11 and a mounting groove 12, a fixing plate 2 and a lower cutter 3 are provided on the mounting groove 12, and a pair of baffles 5 are detachably connected between the fixing plate 2 and the lower cutter 3 via a fixing assembly 4, and the baffles 5 are used to block debris from entering the battery cell;

[0022] The lower cutter 3 cooperates with the upper blade to cut the tabs.

[0023] It should be added that the lower cutter 3 and the upper blade are arranged one above the other and used in conjunction with a driving device to cut the tabs. However, in actual operation, because the metal debris generated by cutting is mainly enriched on the back of the lower cutting blade, the baffle 5 is set on the lower cutter 3 to prevent the debris from entering the battery cell.

[0024] Furthermore, the end face of the mounting groove 12 has a pair of positioning protrusions 13, and the side thereof facing away from the abutting portion 11 is recessed downward to form a step portion 14, and the fixing plate 2 and the lower cutting knife 3 are respectively fixed to the step portion 14 and the abutting portion 11 by fasteners, and the fasteners are locking bolts.

[0025] Furthermore, the top of the baffle 5 is bent into an arc shape toward the side of the lower cutter 3 to avoid interference between the baffle 5 and the diaphragm. The baffle 5 is slidably connected between the fixed plate 2 and the lower cutter 3 and abuts against the positioning protrusion 13.

[0026] It is worth mentioning that in the horizontal direction (front), the gap between the baffles 5 made of acrylic on both sides is larger than the width of the foil, and the baffles 5 on both sides are submerged in the lower cutter 3 in the width direction;

[0027] In addition, in the vertical direction, the height of the baffle 5 is higher than the height of the top surface of the battery cell body when cutting, so as to ensure that the baffle 5 effectively blocks metal debris while not interfering with the tab (otherwise it will poke the tab);

[0028] Furthermore, the portion of the baffle 5 that is higher than the lower cutter 3 is designed to be bent away from the battery cell. In the horizontal direction (side), the width of the baffle 5 is smaller than the width of the lower cutter 3, and the thickness of the baffle 5 is smaller than the distance between the lower cutter 3 and the battery cell body during cutting, thereby ensuring that the baffle 5 does not interfere with the diaphragm (otherwise, the tab cutting will be skewed) and the baffle 5 does not interfere with the battery cell body (otherwise, the electrode sheet will be crushed).

[0029] Specifically, after the baffle 5 contacts the positioning protrusion 13 , the through groove 51 corresponds to the stop block 45 .

[0030] In more detail, the fixing assembly 4 includes a receiving groove 41 and an unlocking rod 42. The receiving groove 41 is provided on the side of the fixing plate 2 close to the baffle 5, and a support portion is provided on the inner wall of the receiving groove 41. A guide portion 43 is provided at one end of the unlocking rod 42, and it is slidably connected to the support portion through a spring 44.

[0031] Specifically, one end of the unlocking rod 42 has a baffle, and the spring 44 is fixedly connected between the baffle and the inner side surface of the accommodating groove 41. The other end of the unlocking rod 42 extends to the periphery of the fixing plate 2 and is provided with a pressing portion.

[0032] In general, a stop block 45 is slidably connected to the side of the accommodating groove 41 , and the stop block 45 contacts and slides with the guide portion 43 . A through slot 51 is formed on the side of the baffle 5 , and the stop block 45 is inserted into the through slot 51 .

[0033] Finally, both sides of the stopper 45 are provided with guiding inclined surfaces, and the stopper 45 contacts and slides with the guide portion 43 and the through slot 51 through the guiding inclined surfaces.

[0034] In a specific operation, the unlocking lever 42, under the elastic support of the spring 44, uses the guide portion 43 to abut against the block 45, so that the block 45 is inserted into the through slot 51 to fix the baffle 5, wherein the guide portion 43 is a spherical structure or a rectangular structure adapted to the guide slope;

[0035] More specifically, the guide slope is as follows Figure 4 As shown, the stop block 45 is a rectangular structure, and is located on both sides of one side of the baffle 5, and on the other side close to the guide portion 43. The guide portion 43 contacts and pushes the stop block 45 to engage the through slot 51 under the support of the spring 44, thereby fixing the baffle 5. Of course, the number of the stop blocks 45 corresponds to the number of the guide portions 43, and a number of the stop blocks 45 can be provided according to actual conditions.

[0036] Similarly, after pressing the unlocking rod 42 inward to disengage the guide portion 43 from the stop block 45, the baffle 5 is manually pulled to move. The guide slopes on both sides can prevent the baffle 5 from getting stuck with the stop block 45 when being pulled out or pushed in. In addition, the guide slopes can be inclined surfaces or arc surfaces to reduce friction.

[0037] Working mode; When working, the fixing plate 2 and the lower cutter 3 are fixed by the locking bolt, and the baffle 5 is provided between the fixing plate 2 and the lower cutter 3 by sliding, and the baffle 5 will contact the positioning protrusion 13 after reaching the appropriate position, and at this time the through groove 51 corresponds to the block 45;

[0038] Afterwards, the unlocking lever 42 is released. Under the elastic support of the spring 44 , the unlocking lever 42 contacts the stop block 45 using the guide portion 43 , so that the stop block 45 is inserted into the through slot 51 to fix the baffle 5 .

[0039] Finally, the unlocking lever 42 is pressed again to make the stop block 45 lose its resistance, and then the baffle 5 is pulled. The baffle 5 uses the guiding inclined surface to contact and push the stop block 45, and the baffle can be taken out.

[0040] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A multi-tab battery foil cutting baffle, comprising a base (1), characterized in that: The top of the base (1) has a supporting portion (11) and a mounting groove (12); a fixing plate (2) and a lower cutter (3) are provided on the mounting groove (12); a pair of baffles (5) are detachably connected between the fixing plate (2) and the lower cutter (3) via a fixing assembly (4); the baffles (5) are used to prevent debris from entering the battery cell; The lower cutter (3) cooperates with the upper blade to cut the tabs.

2. The multi-tab battery core foil cutting baffle according to claim 1, characterized in that: The end surface of the mounting groove (12) has a pair of positioning protrusions (13), and the side thereof facing away from the abutting portion (11) is recessed downward to form a step portion (14), and the fixing plate (2) and the lower cutting knife (3) are respectively fixed to the step portion (14) and the abutting portion (11) by fasteners.

3. The multi-tab battery core foil cutting baffle according to claim 2, characterized in that: The top of the baffle (5) is bent into an arc shape toward the side of the lower cutter (3) to avoid interference between the baffle (5) and the diaphragm. The baffle (5) is slidably connected between the fixed plate (2) and the lower cutter (3) and contacts the positioning protrusion (13).

4. The multi-tab battery core foil cutting baffle according to claim 1, characterized in that: The fixing assembly (4) comprises a receiving groove (41) and an unlocking rod (42); the receiving groove (41) is provided on a side of the fixing plate (2) close to the baffle (5), and a supporting portion is provided on the inner wall of the receiving groove (41); a guide portion (43) is provided at one end of the unlocking rod (42), and the guide portion is slidably connected to the supporting portion via a spring (44).

5. The multi-tab battery core foil cutting baffle according to claim 4, characterized in that: The side of the receiving groove (41) is slidably connected with a stop block (45), and the stop block (45) contacts and slides with the guide portion (43), wherein a through groove (51) is opened on the side of the baffle (5), and the stop block (45) is inserted into the through groove (51).

6. The multi-tab battery core foil cutting baffle according to claim 5, characterized in that: Both sides of the stop block (45) are provided with guiding inclined surfaces, and the stop block (45) contacts and slides with the guide portion (43) and the through slot (51) via the guiding inclined surfaces.

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