Pressing cutter and lamination mechanism

Abstract

The utility model discloses a pressing cutter and a lamination mechanism, and relates to the technical field of battery cell production, the pressing cutter is provided with a crimping end used for crimping a diaphragm; at least part of the outer wall of the crimping end is provided with an air outlet hole, and the air outlet hole is used for blowing air outwards, so that the outer wall of the crimping end is separated from the diaphragm; according to the technical scheme provided by the utility model, the diaphragm and the pressing knife can be quickly separated, and the production quality of a battery cell is favorably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of battery cell production, especially relates to a pressing knife and lamination mechanism. BACKGROUND

[0002] In the related art, the lamination process of the battery cell usually adopts the method of alternately stacking the diaphragm and the positive and negative electrode sheets to produce the battery cell. In the production process of the battery cell, the diaphragm is usually Z-shaped and is wound, and the pressing knife needs to be extended to the diaphragm and press the diaphragm to avoid the diaphragm from being wrinkled during the winding process. Among them, the pressing knife needs to retreat after completing the diaphragm pressing to separate the diaphragm. Since there is friction between the pressing knife and the diaphragm during the pressing knife extraction process, the diaphragm is easy to be driven by the pressing knife to produce wrinkles or cause damage, which affects the production quality of the battery cell. SUMMARY

[0003] The main purpose of the utility model is to provide a pressing knife and lamination mechanism, which is aimed at realizing the rapid separation of the diaphragm and the pressing knife and is beneficial to improving the production quality of the battery cell.

[0004] To achieve the above-mentioned purpose, the pressing knife provided by the utility model has a pressing end for pressing the diaphragm.

[0005] At least part of the outer wall of the pressing end is provided with a gas outlet hole, and the gas outlet hole is used for blowing gas outward to separate the outer wall of the pressing end and the diaphragm.

[0006] In an embodiment, the pressing knife has a gas inlet hole, a gas flow channel and the gas outlet hole which are sequentially communicated.

[0007] The gas outlet hole is provided with a plurality of gas outlet holes which are arranged in an array.

[0008] In an embodiment, the pressing end includes two side surfaces which are oppositely arranged in the horizontal direction, and at least one of the two side surfaces is provided with the gas outlet hole.

[0009] In an embodiment, the pressing end includes two side surfaces which are oppositely arranged in the vertical direction, and at least one of the two side surfaces is provided with the gas outlet hole.

[0010] In an embodiment, the pressing knife includes:

[0011] A main body part is used for driving connection with a driving mechanism to move relative to the diaphragm under the driving of the driving mechanism; and

[0012] A pressing part is connected with the main body part, and one end of the pressing part away from the main body part forms the pressing end.

[0013] In an embodiment, the crimping portion is formed with a chamfer structure at one end away from the main body portion, and the chamfer structure is gradually reduced in thickness in a direction away from the main body portion.

[0014] In an embodiment, a top wall of the chamfer structure is inclined relative to the horizontal direction.

[0015] In an embodiment, a bottom wall of the chamfer structure is inclined relative to the horizontal direction.

[0016] In an embodiment, the main body portion is provided with a limiting groove.

[0017] In an embodiment, an outer wall of the crimping end is provided with a low-friction resistance coating.

[0018] The utility model also provides a lamination mechanism, including preceding any one described pressure cutter, the pressure cutter has crimping end, is used for crimping diaphragm,

[0019] At least part of the outer wall of the crimping end is provided with an air outlet hole, and the air outlet hole is used for blowing air outward to separate the outer wall of the crimping end and the diaphragm.

[0020] The technical scheme of the utility model opens the air outlet hole on the crimping end of the pressure cutter, when the pressure cutter needs to retreat to separate the diaphragm, the air outlet hole can blow air outward, so that the diaphragm attached to the outer wall of the pressure cutter can separate a certain gap under the blowing action of the gas, so as to facilitate the pressure cutter to be quickly pulled out under the condition of separating from the diaphragm, reduce the risk that the diaphragm is wrinkled or damaged by the pressure cutter, and improve the production quality of the battery cell. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained from the structure shown in the drawings without creative labor.

[0022] Figure 1 The structure schematic diagram of one embodiment of the pressure cutter provided by the utility model is shown.

[0023] Explanation of reference numerals:

[0024] 100, pressure cutter; 10, main body portion; 11, limiting groove; 20, crimping portion; 21, air outlet hole; 22, chamfer structure.

[0025] The realization of the utility model, functional characteristics and advantages will be further explained by combining with the embodiments and referring to the drawings. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0027] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0028] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel solutions are included, for example, "A and / or B" includes A solution, or B solution, or A and B solutions. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

[0029] In the related art, the lamination process of the battery cell usually adopts the method of alternately stacking the separator and the positive and negative electrode sheets to produce the battery cell. In the production process of the battery cell, the separator is usually Z-shaped and is wound, and the pressing knife needs to be controlled to extend to the position of the separator and press the separator to avoid the occurrence of wrinkles in the separator during the winding process. After the pressing of the separator is completed, the pressing knife needs to retreat to separate the separator. Since there is a friction force between the pressing knife and the separator during the withdrawal of the pressing knife, the separator is easily driven by the pressing knife to generate wrinkles or cause damage, which affects the production quality of the battery cell.

[0030] The utility model provides a kind of pressing knife 100.

[0031] Please refer to Figure 1 In an embodiment of the present application, the pressing knife 100 has a pressing end for pressing the separator.

[0032] At least part of the outer wall of the crimping end is provided with an air outlet hole 21, which is used for blowing air outward to separate the outer wall of the crimping end and the diaphragm.

[0033] The technical scheme of the utility model discloses that the air outlet hole 21 is arranged at the crimping end of the pressure cutter 100, when the pressure cutter 100 needs to retreat to separate the diaphragm, the air outlet hole 21 can blow air outward, so that the diaphragm adhered to the outer wall of the pressure cutter 100 can be separated from the diaphragm by a certain gap under the blowing action of the gas, so that the pressure cutter 100 can be quickly pulled out under the condition of being separated from the diaphragm, the risk that the diaphragm is wrinkled or damaged by being driven by the pressure cutter 100 is reduced, and the production quality of the battery cell is improved.

[0034] Please refer to Figure 1 In the embodiment of the utility model, the pressure cutter 100 has a gas inlet hole, a gas flow channel and the air outlet hole 21 which are sequentially communicated.

[0035] The air outlet hole 21 is provided with a plurality of air outlet holes 21 which are arranged in an array.

[0036] The gas inlet hole can be used for communicating with the air inlet mechanism. The gas inlet hole or the air inlet mechanism can be provided with a gas valve for controlling the air outlet of the air outlet hole 21. In some embodiments, the air outlet hole 21 can be arranged in at least one column at equal intervals, or can be arranged in other array schemes. The specific implementation can be set according to actual needs, which is not limited here.

[0037] Please refer to Figure 1 In the embodiment of the utility model, the crimping end includes two side surfaces which are oppositely arranged in the horizontal direction, and at least one of the two side surfaces is provided with the air outlet hole 21.

[0038] The air outlet hole 21 can be located at the front end of the side surface, or a plurality of air outlet holes 21 can be provided, and the plurality of air outlet holes 21 are uniformly distributed on the side surface. The specific implementation can be set according to actual needs, which is not limited here.

[0039] Please refer to Figure 1 In the embodiment of the utility model, the crimping end includes two side surfaces which are oppositely arranged in the horizontal direction, and at least one of the two side surfaces is provided with the air outlet hole 21.

[0040] The air outlet hole 21 can be located at the front end of the side surface, or a plurality of air outlet holes 21 can be provided, and the plurality of air outlet holes 21 are uniformly distributed on the side surface. The specific implementation can be set according to actual needs, which is not limited here.

[0041] Please refer to Figure 1 In the embodiment of the utility model, the pressure cutter 100 includes:

[0042] The body part 10 is used to drive-connect a driving mechanism, so as to move relative to the diaphragm under the driving of the driving mechanism.

[0043] The crimping part 20 is connected with the body part 10, and an end of the crimping part 20 away from the body part 10 forms the crimping end.

[0044] The body part 10 can be directly connected to the driving end of the external driving mechanism to be driving-connected with the driving mechanism, or the body part 10 can be mounted on a mounting bracket or a mounting module which is driving-connected with the driving mechanism, and can be mounted and fixed by a fastening structure such as a screw, but is not limited to this. The specific embodiment can be set according to actual needs, and is not limited herein.

[0045] Please refer to Figure 1 In the embodiment of the utility model, the end of the crimping part 20 away from the body part 10 is formed with a chamfer structure 22, and the thickness of the chamfer structure 22 gradually decreases in the direction away from the body part 10.

[0046] The chamfer structure 22 with gradually decreasing thickness is formed at the end of the crimping part 20, which is beneficial to reduce the contact area between the outer wall of the crimping part 20 and the diaphragm, and facilitate the extension of the crimping part 20 to crimp the diaphragm.

[0047] In the embodiment of the utility model, the top wall of the chamfer structure 22 is inclined relative to the horizontal direction, and the bottom wall is parallel to the horizontal direction. In this way, the thickness of the chamfer structure 22 gradually decreases in the direction away from the body part 10.

[0048] In some embodiments, the bottom wall of the chamfer structure 22 is inclined relative to the horizontal direction, and the top wall is parallel to the horizontal direction. In this way, the thickness of the chamfer structure 22 gradually decreases in the direction away from the body part 10.

[0049] Of course, the technical scheme of the utility model is not limited to this, and in some embodiments, the top wall and the bottom wall of the chamfer structure 22 can be inclined relative to the horizontal direction. The specific embodiment can be set according to actual needs, and is not limited herein.

[0050] Please refer to Figure 1 In the embodiment of the utility model, the body part 10 is provided with a limiting groove 11.

[0051] In this way, the limiting groove 11 on the main body 10 and the limiting block of the external mounting structure can be used to achieve positional coordination, thereby improving the installation stability of the pressing blade 100. The pressing blade 100 can be directly mounted to the driving end of the drive mechanism so as to be directly driven by the drive mechanism. Alternatively, the pressing blade 100 can be mounted on a mounting bracket or mounting module that is transmission-connected to the drive mechanism. The specific implementation method can be customized according to actual needs and is not limited here.

[0052] See also Figure 1 In an embodiment of the present invention, the outer wall of the crimping end is provided with a low friction resistance coating.

[0053] Thus, by providing a low-friction coating on the outer wall of the crimping end of the press blade 100, the pressure between the press blade 100 and the diaphragm can be reduced, thereby further reducing the risk of the diaphragm being wrinkled or damaged by the press blade 100. The low-friction coating can be, but is not limited to, a Teflon coating. The specific implementation method can be customized according to actual needs and is not limited here.

[0054] The present invention also proposes a lamination mechanism, which includes a pressing knife 100. The specific structure of the pressing knife 100 refers to the above embodiment. Since this lamination mechanism adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0055] In some embodiments, the stacking mechanism of the present invention has a stacking table and a pressing knife 100, wherein the stacking mechanism can be pulled out through the diaphragm assembly and introduced into the stacking table, and the positive and negative electrode sheets are alternately placed on the diaphragm using a manipulator or other transfer device. The diaphragm is stacked in a Z-shape through the reciprocating motion of the stacking table or the diaphragm assembly, thereby separating the positive and negative electrode sheets. There are four pressing knives 100, and the pressing knives 100 are set in groups of two. The two groups of pressing knives 100 are arranged opposite to each other and are respectively arranged on opposite sides of the stacking table. The two pressing knives 100 in each group are spaced apart on the same side of the stacking table. The four pressing knives 100 are all movably arranged relative to the stacking table, and are used to extend toward the stacking table to press the electrode sheets or diaphragms to assist in the stacking process of the diaphragms and electrode sheets, thereby realizing the preparation and production of battery cells of stacked batteries.

[0056] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A presser foot, characterized in that, The pressing tool has a pressing end for pressing the diaphragm; At least part of the outer wall of the pressing end is provided with gas outlet holes for blowing gas outward to separate the outer wall of the pressing end and the diaphragm.

2. The presser foot of claim 1, wherein, The pressing tool has a gas inlet hole, a gas flow channel and the gas outlet holes which are sequentially communicated; The gas outlet holes are arranged in an array.

3. The presser foot of claim 2, wherein, The pressing end includes two side surfaces arranged opposite in the horizontal direction, and at least one of the two side surfaces is provided with the gas outlet holes.

4. The presser blade of claim 2, wherein The pressing end includes two side surfaces arranged opposite in the vertical direction, and at least one of the two side surfaces is provided with the gas outlet holes.

5. The presser blade according to any one of claims 1 to 4, wherein The pressing tool includes: a main body part for driving connection with a driving mechanism to move relative to the diaphragm under the driving of the driving mechanism; and a pressing part connected with the main body part, and an end of the pressing part away from the main body part forms the pressing end.

6. The presser blade according to claim 5, wherein The end of the pressing part away from the main body part is formed with a chamfer structure, and the thickness of the chamfer structure gradually decreases in the direction away from the main body part.

7. The presser blade of claim 6, wherein The top wall of the chamfer structure is arranged inclined relative to the horizontal direction. The bottom wall of the chamfer structure is arranged inclined relative to the horizontal direction.

8. The presser blade of claim 5, wherein The main body part is provided with a limiting groove.

9. The presser blade according to any one of claims 1 to 4, wherein The outer wall of the pressing end is provided with a low friction resistance coating.

10. A lamination mechanism characterized by, The pressing tool according to any one of claims 1 to 9.

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