Dust collection box for pole piece cutting of lithium ion battery winding machine
By introducing a dust collection chamber and a dust-adhesive pad structure into the dust collection box of a lithium-ion battery winding machine, the problem of dust entering the winding core is solved, effectively removing dust, reducing the risk of internal short circuits and self-discharge, and improving battery safety.
Patent Information
- Application Number
- CN202422784159.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-14
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-11-14
AI Technical Summary
In existing lithium-ion battery winding machines, some dust falls onto the electrode sheets and gets rolled into the winding core along with them, leading to a high risk of internal short circuits, excessive self-discharge, and even the potential for explosion.
A dust collection box for cutting electrode sheets in a lithium-ion battery winding machine has been designed, comprising a dust collection chamber, a dust-adhesive pad, a sealing door, and an exhaust vent. The dust-adhesive pad holds the dust in place to prevent it from being stirred up, and the exhaust vent removes the dust from the dust collection chamber, preventing dust from entering the winding core.
This effectively prevents dust from entering the core, reduces the risk of internal short circuits and self-discharge rate, and improves the safety and reliability of the battery.
Smart Images
Figure CN223603101U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of battery, specifically, relate to lithium ion battery winding machine cut polar piece's dust absorption box. BACKGROUND
[0002] The winding process is the key process of the lithium ion battery manufacturing process, acts as the pivot of the lithium ion battery manufacturing process, and makes the appearance of the battery initially take shape, and the winding core produced is usually called "bare battery core".
[0003] The main mechanism and key components of the winding machine include positive and negative polar pieces and diaphragm active unwinding, polar piece and diaphragm roll change, automatic deviation correction, automatic tension detection and control, clamp roller drive, polar piece cutter and dust absorption box.
[0004] The main process of winding requires that: the pole piece comes out from the active unwinding mechanism, passes through the guide wheel, and is finally introduced into the needle part by the clamp roller driving mechanism, and is wound together with the diaphragm according to the process requirements, and after winding is completed, it is automatically changed to a work position, the diaphragm is cut off and the termination adhesive tape is pasted, and the bare battery is automatically discharged, the good product is automatically transferred to the conveyor belt of the assembly line and flows into the next process, and the defective product is automatically discharged to the defective product collection box; the core control point in this process is that: the positive and negative poles do not occur physical contact short circuit, and the positive pole piece can be completely wrapped in the positive pole piece in the horizontal and vertical directions, and the diaphragm can be completely wrapped in the positive and negative pole pieces in the horizontal and vertical directions; when the winding is about to be completed, the cutting knife of the winding machine installed in the dust collection box will cut off the pole piece in advance, and dust will be generated during the cutting of the pole piece, for example: copper powder and negative pole material powder generated by cutting the pole piece using copper foil as the negative pole current collector, aluminum powder and positive pole material powder generated by cutting the pole piece using aluminum foil as the positive pole current collector; in addition, when the positive pole current collector and the negative pole current collector are respectively super-welded with nickel material negative pole lug and aluminum material positive pole lug, metal dust will also be generated, however, the welding head and the welding seat of the super-welded lug also have a small amount of wear, and metal dust will also be generated, part of the dust has a certain probability of falling on the surface of the pole piece, when the dust falling on the surface of the pole piece enters the dust collection box together with the pole piece, and when the pole piece cutting knife in the dust collection box cuts the pole piece to generate dust, part of the dust in the dust will be sucked away by the vacuum pipeline negative pressure of the dust collection box, another part of the dust will be wound into the roll core together with the pole piece, and another part of the dust will fall on the bottom of the dust collection box; in the continuous production process, with the passage of time, the amount of dust accumulated at the bottom of the dust collection box will increase, and the dust collection box will move up and down with the clamp roller driving mechanism and the cutting knife of the winding machine once every time the winding is performed, due to inertia, the dust accumulated at the bottom of the dust collection box will be raised, part of the dust will fall on the pole piece and be wound into the roll core together with the pole piece, and another part of the dust will fall back to the bottom of the dust collection box and accumulate, waiting for the next winding, vicious cycle; due to the relatively time-consuming disassembly and installation of the dust collection box, in order to minimize the impact on the on-duty production, the on-duty winding worker will only perform daily maintenance before leaving work, and the dust collection box will be disassembled and cleaned, the maintenance period is relatively long, if the amount of dust generated by the winding and cutting of the pole piece in the continuous production process abnormally increases or the dust particles abnormally increase, and if it is not treated in time, it may eventually lead to a large self-discharge rate of a large number of batteries, and even internal short-circuit explosion, which is not conducive to reducing the self-discharge rate and explosion rate of the battery during use by the customer. Practical new type content
[0005] The purpose of the present application is to provide a dust collection box for cutting pole pieces of a lithium ion battery winding machine, which aims to solve the problem that part of the dust in the dust collection box falls on the pole piece and is wound into the roll core together with the pole piece in the prior art.
[0006] The utility model discloses a dust absorption box of lithium ion battery winding machine cutting pole piece, including the box body, the box body has the dust collection cavity, be provided with the dust sticking pad on the inside wall of dust collection cavity, the upper and lower both ends of box body are set up pole piece entrance and pole piece exit respectively, the pole piece exit and pole piece entrance are linked through dust collection cavity, and the pole piece exit and pole piece entrance are longitudinally opposite interval arrangement between.
[0007] Further, the dust sticking pad is covered on the bottom of the dust collection cavity.
[0008] Further, the box body is provided with a cleaning port, the cleaning port is communicated with the dust collection cavity, and the box body is hingedly connected with a sealing door.
[0009] Further, the sealing door is provided with an air suction port communicated with the dust collection cavity, a pipe joint is installed on the air suction port, and the pipe joint is connected with the sealing door.
[0010] Further, the sealing door is connected with a sealing sponge rubber layer, and the sealing sponge rubber layer is circumferentially arranged along the inner side wall of the sealing door.
[0011] Further, one side of the sealing door is hingedly connected with the box body, and the other side of the sealing door is detachably connected with the box body through a buckle.
[0012] Further, the box body is provided with an upper guide sheet structure, and the upper guide sheet structure is arranged along the length direction of the pole piece inlet.
[0013] Further, the upper guide sheet structure comprises a first guide sheet strip and a second guide sheet strip, the first guide sheet strip and the second guide sheet strip are respectively arranged along the length direction of the two sides of the pole piece inlet, the inner end of the first guide sheet strip and the inner end of the second guide sheet strip are respectively abutted on the box body, and the outer end of the first guide sheet strip and the outer end of the second guide sheet strip are arranged in an inclined shape away from each other.
[0014] Further, the box body is provided with a lower guide sheet structure, and the lower guide sheet structure is arranged along the length direction of the pole piece outlet.
[0015] Further, the lower guide sheet structure comprises a third guide sheet strip and a fourth guide sheet strip, the third guide sheet strip and the fourth guide sheet strip are respectively arranged along the length direction of the two sides of the pole piece outlet, the upper part of the third guide sheet strip and the upper part of the fourth guide sheet strip are respectively located in the dust collection cavity, and the two are arranged in an inclined shape away from each other, the lower part of the third guide sheet strip and the lower part of the fourth guide sheet strip are respectively located outside the box body, and the two are arranged in an inclined shape extending towards each other, and the third guide sheet strip and the fourth guide sheet strip are respectively abutted on the inner side wall of the pole piece outlet.
[0016] Compared with the prior art, the dust suction box for cutting polar sheets of the lithium ion battery winding machine provided by the utility model can avoid the risk of internal short circuit caused by the dust falling on the polar sheet and being rolled into the winding core with the polar sheet, and solve the problem that part of the dust in the dust suction box can fall on the polar sheet and be rolled into the winding core with the polar sheet. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 is the front view structural schematic diagram of the dust suction box for cutting polar sheets of the lithium ion battery winding machine provided by the utility model;
[0018] Figure 2 is the front view sectional structural schematic diagram of the dust suction box for cutting polar sheets of the lithium ion battery winding machine provided by the utility model;
[0019] Figure 3 is the top view structural schematic diagram of the dust suction box for cutting polar sheets of the lithium ion battery winding machine provided by the utility model;
[0020] Figure 4 is the bottom view structural schematic diagram of the dust suction box for cutting polar sheets of the lithium ion battery winding machine provided by the utility model;
[0021] Figure 5 is the side view structural schematic diagram of the dust suction box for cutting polar sheets of the lithium ion battery winding machine provided by the utility model.
[0022] In the drawing: box body 10, dust sticking pad 20, sealing door 30, pipeline joint 40, buckle 50, upper guide sheet structure 60, lower guide sheet structure 70, dust collecting cavity 11, polar sheet inlet 12, polar sheet outlet 13, first guide sheet strip 61, second guide sheet strip 62, third guide sheet strip 71, fourth guide sheet strip 72. DETAILED DESCRIPTION
[0023] In order to make the purpose, technical scheme and advantages of the utility model more clear and understandable, the utility model is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.
[0024] The implementation of the utility model is described in detail below in combination with specific embodiments.
[0025] The same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components; in the description of the utility model, it is understood that if the orientations or positional relationships indicated by terms such as 'upper', 'lower', 'left', 'right' are based on the orientations or positional relationships shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and therefore the terms describing the positional relationships in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the utility model, and for ordinary skilled persons in the art, the specific meanings of the above terms can be understood according to the specific circumstances.
[0026] Referring to Figures 1-5 The preferred embodiment provided by the utility model is shown in the drawings.
[0027] The dust suction box for cutting polar sheets of a lithium ion battery winding machine comprises a box body 10, a dust collecting cavity 11 is arranged in the box body 10, a dust sticking pad 20 is arranged on the inner side wall of the dust collecting cavity 11, a polar sheet inlet 12 and a polar sheet outlet 13 are respectively arranged on the upper and lower ends of the box body 10, the polar sheet outlet 13 and the polar sheet inlet 12 are communicated through the dust collecting cavity 11, and the polar sheet outlet 13 and the polar sheet inlet 12 are arranged in longitudinal relative spacing.
[0028] The dust suction box for cutting polar sheets of a lithium ion battery winding machine provided above, whenever dust is generated during the cutting of polar sheets, the dust falling on the bottom of the box body 10 can be stuck by the dust sticking pad 20 in the dust collecting cavity 11, and will not be raised due to the rapid up-and-down movement of the box body 10 together with the clamping roller driving mechanism and the cutter of the winding machine, thereby avoiding the risk of internal short circuit caused by the dust falling on the polar sheets and being rolled into the winding core together with the polar sheets; and the problem that part of the dust in the dust suction box falls on the polar sheets and is rolled into the winding core together with the polar sheets is solved.
[0029] The box body 10 is cut and welded from a 304 stainless steel plate with a thickness of 2.0 mm, and has an outer dimension of 147 mm in length, 125 mm in width and 50 mm in height;
[0030] A rectangular polar sheet inlet 12 is arranged on the upper wall surface of the box body 10, and has a dimension of 14 mm in width and 130 mm in length;
[0031] A rectangular polar sheet outlet 13 is arranged on the lower wall surface of the box body 10, and has a dimension of 9 mm in width and 130 mm in length.
[0032] In the embodiment, the dust sticking pad 20 is arranged on the bottom of the dust collecting cavity 11. In this way, the dust sticking pad 20 can more easily adsorb dust.
[0033] The dust sticking pad 20 is single-sided adhesive tape, with the adhesive side upward and the non-adhesive side downward. The outer dimensions of the dust sticking pad 20 are 103 mm in width and 147 mm in length, and a rectangular through hole corresponding to the position of the pole piece outlet 13 is formed in the dust sticking pad 20, with the dimensions of 11 mm in width and 130 mm in length.
[0034] The appearance of the completed embodiment is 169 mm in length, 127 mm in width and 60 mm in height.
[0035] In the embodiment, a cleaning port is formed in the box body 10, and the cleaning port is in communication with the dust collecting cavity 11. A sealing door 30 is hingedly connected to the box body 10, and the sealing door 30 blocks the cleaning port.
[0036] The sealing door 30 is provided on the front wall of the box body 10. During continuous production, the winding worker can open the sealing door 30 at regular time intervals to visually observe the amount of falling dust on the dust sticking pad 20 at the bottom of the dust collecting cavity 11.
[0037] When the amount of falling dust or the size of dust particles is found to be abnormally increased, the equipment can be immediately stopped for maintenance, and the related suspected products in the self-inspection period can be isolated for degradation treatment, so as to avoid the battery with mixed dust in the core and the large self-discharge rate from flowing into the customer for use as good products, which is beneficial to reducing the self-discharge rate and explosion rate of the battery during use by the customer.
[0038] When it is confirmed that the amount of falling dust and the size of dust particles are still normal, an industrial cotton swab can also be used to quickly wipe and clean the blade of the pole piece cutter of the winding machine and the surface near the blade, so as to reduce the amount of dust falling into the bottom of the dust collecting cavity 11 and the surface of the pole piece due to shaking during the cutting of the pole piece, thereby reducing the probability of the dust falling on the pole piece and being rolled into the core together with the pole piece, which is beneficial to finally reducing the self-discharge rate and explosion rate of the battery.
[0039] The sealing door 30 is cut and shaped from a 304 stainless steel plate with a thickness of 2.0 mm, and the outer dimensions of the sealing door 30 are 50 mm in height and 60 mm in width. The inner space of the door frame matched with the sealing door 30 is 44 mm in height and 54 mm in width.
[0040] In the embodiment, the sealing door 30 is provided with an air suction port in communication with the dust collecting cavity 11, and a pipe joint 40 is mounted on the air suction port. The pipe joint 40 is connected with the sealing door 30. In this way, the pipe joint 40 can be connected with a vacuum negative pressure pipe, so as to realize the absorption of dust in the dust collecting cavity 11. The pipe joint 40 can also be connected with a negative pressure fan, so as to realize the absorption of dust in the dust collecting cavity 11.
[0041] The diameter of the through hole of the air suction port on the sealing door 30 is 24 mm.
[0042] The pipe joint 40 is made of 304 stainless steel pipe with a thickness of 2.0 mm, an inner diameter of 24 mm, and a length of 20 mm.
[0043] In this embodiment, the sealing door 30 is connected with a sealing sponge rubber layer, which is arranged along the inner side wall of the sealing door 30 in a circumferential manner. In this way, when the sealing door 30 is connected with the box body 10 through the sealing sponge rubber layer, a sealing effect can be achieved, thereby improving the efficiency of dust extraction in the dust collection cavity 11.
[0044] The sealing sponge rubber layer is a single-sided adhesive with a thickness of 2.0 mm, a length of 60 mm, and a width of 50 mm.
[0045] In this embodiment, one side of the sealing door 30 is connected with the box body 10 through a hinge, and the other side of the sealing door 30 is detachably connected with the box body 10 through the buckle 50. In this way, the sealing door 30 can be hingedly rotated with the box body 10, and the buckle 50 can be used to open and close the door.
[0046] In this embodiment, the box body 10 is provided with an upper guide piece structure 60, which is arranged along the length direction of the pole piece inlet 12. In this way, the box body 10 can guide the pole pieces into the dust collection cavity 11 through the upper guide piece structure 60.
[0047] In this embodiment, the upper guide piece structure 60 includes a first guide piece strip 61 and a second guide piece strip 62, which are respectively arranged along the length direction of the two sides of the pole piece inlet 12. The inner ends of the first guide piece strip 61 and the second guide piece strip 62 respectively abut against the box body 10, and the outer ends of the first guide piece strip 61 and the second guide piece strip 62 are arranged in an inclined manner away from each other.
[0048] The upper guide piece structure 60 can better guide the pole pieces into the dust collection cavity 11 through the structure of the first guide piece strip 61 and the second guide piece strip 62, thereby facilitating the extraction of dust.
[0049] In this embodiment, the box body 10 is provided with a lower guide piece structure 70, which is arranged along the length direction of the pole piece outlet 13. The lower guide piece structure 70 is arranged in a longitudinal and spaced manner with the upper guide piece structure 60. In this way, the box body 10 can guide the pole pieces out through the lower guide piece structure 70.
[0050] In the embodiment, the lower guide vane structure 70 comprises a third guide vane strip 71 and a fourth guide vane strip 72, the third guide vane strip 71 and the fourth guide vane strip 72 are respectively arranged along the length direction of the two sides of the pole piece outlet 13, the upper part of the third guide vane strip 71 and the upper part of the fourth guide vane strip 72 are respectively located in the dust collecting cavity 11, and the two are arranged in an inclined shape away from each other; the lower part of the third guide vane strip 71 and the lower part of the fourth guide vane strip 72 are respectively located outside the box body 10, and the two are arranged in an inclined shape extending towards each other; the third guide vane strip 71 and the fourth guide vane strip 72 are respectively abutted on the inner side walls of the pole piece outlet 13.
[0051] The lower guide vane structure 70 can better guide the pole piece to be guided out of the dust collecting cavity 11 through the structural arrangement of the third guide vane strip 71 and the fourth guide vane strip 72, and avoid the pole piece from being retained in the dust collecting cavity 11.
[0052] The above only describes the preferred embodiments of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A dust suction box for cutting electrode sheets of a lithium ion battery winding machine, characterized by, The dust box comprises a box body, a dust collecting cavity in the box body, a dust sticking pad on the inner side wall of the dust collecting cavity, a polar plate inlet and a polar plate outlet respectively on the upper and lower ends of the box body, the polar plate inlet and the polar plate outlet being in communication through the dust collecting cavity, and the polar plate inlet and the polar plate outlet being longitudinally spaced apart.
2. The dust collection box for cutting the jelly-roll of the lithium ion battery winding machine according to claim 1, wherein, The dust sticking pad covers the bottom of the dust collecting cavity.
3. The dust collection box for cutting the jelly-roll of the lithium ion battery winding machine according to claim 2, wherein, A cleaning port is formed on the box body and is in communication with the dust collecting cavity.
4. The dust collection box for cutting the jelly-roll of the lithium ion battery winding machine according to claim 3, wherein, A sealing door is hingedly connected to the box body and seals the cleaning port.
5. The dusting box for cutting the electrode sheet of the lithium ion battery winding machine according to claim 4, wherein An air suction port in communication with the dust collecting cavity is formed on the sealing door, and a pipe joint is mounted on the air suction port and connected to the sealing door.
6. The dusting box for cutting the electrode sheet of the lithium ion battery winding machine according to claim 5, wherein, A sealing sponge layer is connected to the sealing door and circumferentially arranged along the inner side wall of the sealing door.
7. The dust box for cutting the electrode sheet of the lithium ion battery winding machine according to any one of claims 1 to 6, characterized by, One side of the sealing door is hingedly connected to the box body, and the other side of the sealing door is detachably connected to the box body through a buckle.
8. The dust collection box for cutting the tab sheet of the lithium ion battery winding machine according to claim 7, wherein, An upper guide piece structure is arranged on the box body and extends along the length direction of the polar plate inlet.
9. The dusting box for cutting the tab sheet of the lithium ion battery winding machine according to claim 8, wherein, The upper guide piece structure comprises a first guide piece strip and a second guide piece strip, the first guide piece strip and the second guide piece strip respectively extend along the length direction of the two sides of the polar plate inlet, the inner end of the first guide piece strip and the inner end of the second guide piece strip respectively abut on the box body, and the outer end of the first guide piece strip and the outer end of the second guide piece strip are arranged in an inclined manner away from each other.
10. The dusting box for cutting the tab sheet of the lithium ion battery winding machine according to claim 9, wherein, A lower guide piece structure is arranged on the box body and extends along the length direction of the polar plate outlet, and the lower guide piece structure is longitudinally spaced apart from the upper guide piece structure. The lower guide piece structure comprises a third guide piece strip and a fourth guide piece strip, the third guide piece strip and the fourth guide piece strip respectively extend along the length direction of the two sides of the polar plate outlet, the upper part of the third guide piece strip and the upper part of the fourth guide piece strip are respectively located in the dust collecting cavity and are arranged in an inclined manner away from each other, the lower part of the third guide piece strip and the lower part of the fourth guide piece strip are respectively located outside the box body and are arranged in an inclined manner extending towards each other, and the third guide piece strip and the fourth guide piece strip respectively abut on the inner side wall of the polar plate outlet.