Heating winding needle and winding machine

Abstract

The utility model provides a heating winding needle and a winding machine, and relates to the field of lithium battery production equipment. The heating winding needle comprises a winding needle body, at least one group of magnets are arranged on the peripheral side of the winding needle body, the two magnets in each group are oppositely arranged, the opposite face magnetic poles are opposite, a magnetic induction line is formed between the two magnets in each group, a winding is wound on the winding needle body, and the winding is used for cutting the magnetic induction line to generate current. An electric heater is further fixedly installed on the winding needle body and electrically connected with the winding, the winding supplies power to the electric heater, and the electric heater is used for heating the winding needle body. The winding needle body can be heated, so that the winding needle body has a certain temperature, heat is conducted to a diaphragm and a pole piece, glue attached to the surface of the diaphragm is melted, the bonding effect of the diaphragm and the pole piece is better, and no opening is formed after cold pressing.

Description

Technical Field

[0001] The utility model relates to the field of lithium battery production equipment, in particular to a heating winding needle and a winding machine. Background Art

[0002] Lithium-ion battery is a secondary battery (rechargeable battery) that mainly relies on the movement of lithium ions between the positive and negative electrodes to work.

[0003] Lithium-ion battery cells require a winding machine during production. When the winding machine winds the bare cells, after the winding needle winds the pole piece, the unloading clamping needle moves the round cell to the cold pressing station of the winding machine for cold pressing and shaping, and then enters the next equipment tunnel furnace for heating, and then enters the cold pressing machine for cold pressing and shaping; conventional winding needles have no heating function, and the diaphragm and the pole piece are bonded by glue. When the winding machine produces some products, due to the viscosity problem of the glue between the diaphragm and the pole piece, the cell will open due to insufficient viscosity after cold pressing, affecting the production quality and capacity of the cell. Utility Model Content

[0004] In view of the above-mentioned problems, the utility model proposes a heating winding needle and a winding machine, which can heat the winding needle so that the winding needle has a certain temperature, and at the same time conduct heat to the diaphragm and the electrode, melt the glue attached to the surface of the diaphragm, so that the bonding effect between the diaphragm and the electrode is better, and there is no opening after cold pressing.

[0005] The technical solution of the utility model is achieved in this way:

[0006] The utility model firstly proposes a heating winding needle, comprising a winding needle body, at least one group of magnets being arranged on the circumferential side of the winding needle body, the two magnets in each group being arranged opposite to each other and having opposite surface magnetic poles, magnetic flux lines being formed between the two magnets in each group, a winding being wound on the winding needle body, the winding being used for cutting the magnetic flux lines to generate electric current, an electric heater being fixedly mounted on the winding needle body, the electric heater being electrically connected to the winding, the winding supplying power to the electric heater, and the electric heating device being used for heating the winding needle body.

[0007] Preferably, the magnet is a permanent magnet.

[0008] Preferably, the winding is a copper wire winding.

[0009] Preferably, the electric heater is an electric heating rod.

[0010] Preferably, there are two, four, six or eight electric heating rods, which are evenly arranged on the winding needle body.

[0011] Preferably, the end of the winding needle body is transmission-connected to a driving motor for driving the winding needle body to rotate.

[0012] Preferably, it also includes a pole lug smoothing mechanism, which includes a first smoothing plate and a second smoothing plate; the first smoothing plate is fixed to the first frame, and a rotating adjustment shaft coaxial with the winding needle body is fixed to the first frame, the end of the rotating adjustment shaft is sleeved in the adjusting collar, and a radial threaded through hole is provided on the outer circumferential surface of the adjusting collar, and a locking bolt for fixing is threadedly connected in the threaded through hole, and a radial telescopic adjustment rod is fixed on the outer circumferential surface of the adjusting collar; the second smoothing plate is fixed to the second frame, and at least one waist-shaped adjustment through hole is provided on the second frame, and an adjustment hole matching the waist-shaped adjustment through hole is provided on the first frame, and also includes an adjusting bolt passing through the adjustment hole and the waist-shaped adjustment through hole, and an adjusting nut is threadedly connected on the adjusting bolt.

[0013] Preferably, the telescopic adjustment rod comprises a telescopic sleeve, a threaded hole is formed on the end surface of the telescopic sleeve away from the adjustment collar, a screw rod is connected in the threaded hole, and at least one stabilizing nut is connected to the screw rod.

[0014] Preferably, the first caressing plate is an arc-shaped plate, the second caressing plate is a flat plate, and an arc-shaped guide plate is fixed to the feed end of the second caressing plate.

[0015] The utility model further provides a winding machine, which comprises the heating winding needle mentioned above.

[0016] The beneficial effects of the utility model are as follows: magnets are arranged on the peripheral sides of the winding needle body of the utility model, and a winding is wound on the winding needle body. When the winding needle body rotates, the winding will be driven to cut the magnetic flux lines, and the winding will generate current to power the electric heater for heating. The electric heating device heats the winding needle body, and the winding needle body heats the glue between the diaphragm and the pole piece during the winding process, so that the adhesion between the diaphragm and the pole piece is better and firmer, and opening due to insufficient viscosity is prevented, thereby ensuring the production quality of the battery cell; and at the same time, no additional electricity consumption is required, thereby achieving energy saving and emission reduction effects; adding a pole ear smoothing mechanism can make the pole ear smoother, and the pole ear smoothing mechanism can be adjusted as needed, with strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a three-dimensional schematic diagram of Example 1;

[0019] Figure 2 It is a front view schematic diagram of Example 1;

[0020] Figure 3 is a three-dimensional schematic diagram of the telescopic adjustment rod in Example 1;

[0021] Figure 4 It is a three-dimensional schematic diagram of the half-rolled needle in Example 1.

[0022] Reference numerals in the figure: winding needle body 1, magnet 2, winding 3, electric heating rod 4, driving motor 5, pole ear smoothing mechanism 6, half winding needle 11, rotating shaft 51, first smoothing plate 61, second smoothing plate 62, arc guide plate 621, first frame 63, rotating adjustment shaft 631, adjusting collar 632, threaded through hole 633, adjusting hole 634, telescopic adjustment rod 64, telescopic sleeve 641, screw 642, stabilizing nut 643, second frame 65, waist-shaped adjustment through hole 651, adjusting bolt 652, diaphragm 71, pole piece 72, pole ear 73. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example 1

[0024] Reference Figure 1-4 A heating winding needle comprises a winding needle body 1, at least one group of magnets 2 is arranged on the circumferential side of the winding needle body 1, the two magnets 2 in each group are arranged opposite to each other and the relative surface poles are opposite, and magnetic flux lines are formed between the two magnets 2 in each group, a winding 3 is wound on the winding needle body 1, and the winding 3 is used to cut the magnetic flux lines to generate current, and an electric heater is also fixedly installed on the winding needle body 1, the electric heater is electrically connected to the winding 3, the winding 3 supplies power to the electric heater, and the electric heating device is used to heat the winding needle body 1.

[0025] Among them, the magnet 2 is a permanent magnet; the winding 3 is a copper wire winding; the electric heater is an electric heating rod 4, and the electric heating rods 4 are two, four, six or eight and are evenly arranged on the winding needle body 1.

[0026] The end of the winding needle body 1 is connected to a driving motor 5 for driving the winding needle body 1 to rotate. A rotating shaft 51 is fixedly connected to the output shaft of the driving motor 5. The winding needle body 1 includes two crescent-shaped half winding needles 11, which are relatively fixed on both sides of the rotating shaft 51.

[0027] As a preferred technical solution, it also includes a tab smoothing mechanism 6, which includes a first smoothing plate 61 and a second smoothing plate 62; the first smoothing plate 61 is fixed on the first frame 63, and a rotating adjustment shaft 631 coaxial with the winding needle body 1 is fixed on the first frame 63, and the end of the rotating adjustment shaft 631 is sleeved in the adjusting collar 632, and a radial threaded through hole 633 is provided on the outer circumferential surface of the adjusting collar 632, and a locking bolt (not shown) for fixing is threadedly connected in the threaded through hole 633, and a radial telescopic adjustment rod 64 is fixed on the outer circumferential surface of the adjusting collar 632; the second smoothing plate 62 is fixed on the second frame 65, and at least one waist-shaped adjustment through hole 651 is provided on the second frame 65, and an adjustment hole 634 cooperating with the waist-shaped adjustment through hole 651 is provided on the first frame 63, and also includes an adjusting bolt 652 passing through the adjusting hole 634 and the waist-shaped adjustment through hole 651, and an adjusting nut (not shown) is threadedly connected on the adjusting bolt 652.

[0028] The telescopic adjustment rod 64 includes a telescopic sleeve 641, and a threaded hole is formed on the end surface of the telescopic sleeve 641 away from the adjustment collar 632, and a screw rod 642 is connected in the threaded hole, and at least one stabilizing nut 643 is also connected to the screw rod 642. The first caressing plate 61 is an arc-shaped plate, and the second caressing plate 62 is a flat plate. An arc-shaped guide plate 621 is fixed to the feeding end of the second caressing plate 62.

[0029] The utility model has a winding needle body 1 with a magnet 2 arranged around it, and a winding 3 is wound on the winding needle body 1. When the winding needle body 1 rotates, the winding 3 is driven to cut the magnetic flux lines. The winding 3 generates current to power the electric heater for heating. The electric heater heats the winding needle body 1. The winding needle body 1 heats the glue between the diaphragm 71 and the pole piece 72 during the winding process, so that the diaphragm 71 and the pole piece 72 are better and more firmly bonded to prevent opening due to insufficient viscosity, thereby ensuring the production quality of the battery cell; and at the same time, no additional electricity consumption is required, thereby achieving energy saving and emission reduction effects; adding a pole ear smoothing mechanism 6 can make the pole ear 73 smoother, and the pole ear smoothing mechanism 6 can be adjusted as needed, with strong adaptability. Example 2

[0030] A winding machine comprising the heating winding needle described in Example 1.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A heating needle curling machine, characterized in that: It includes a winding needle body, and at least one group of magnets is arranged on the circumferential side of the winding needle body. The two magnets in each group are arranged opposite to each other and have opposite surface poles. Magnetic flux lines are formed between the two magnets in each group. A winding is wound on the winding needle body, and the winding is used to cut the magnetic flux lines to generate current. An electric heater is also fixedly installed on the winding needle body, and the electric heater is electrically connected to the winding. The winding supplies power to the electric heater, and the electric heating device is used to heat the winding needle body.

2. The heating needle coil according to claim 1, characterized in that: The magnet is a permanent magnet.

3. The heating needle coil according to claim 1, characterized in that: The winding is a copper wire winding.

4. The heating needle coil according to claim 1, characterized in that: The electric heater is an electric heating rod.

5. The heating needle coil according to claim 4, characterized in that: The number of the electric heating rods is two, four, six or eight, and they are evenly arranged on the winding needle body.

6. The heating needle coil according to claim 1, characterized in that: The end of the winding needle body is transmission-connected with a driving motor for driving the winding needle body to rotate.

7. The heating needle coil according to claim 1, characterized in that: It also includes a tab smoothing mechanism, which includes a first smoothing plate and a second smoothing plate; The first caressing plate is fixed on the first frame, and a rotating adjustment shaft coaxial with the winding needle body is fixed on the first frame, and the end of the rotating adjustment shaft is sleeved in the adjusting collar, and a radial threaded through hole is opened on the outer circumferential surface of the adjusting collar, and a locking bolt for fixing is connected with the thread in the threaded through hole, and a radial telescopic adjustment rod is fixed on the outer circumferential surface of the adjusting collar; The second smoothing plate is fixed on the second frame, and at least one waist-shaped adjustment through hole is opened on the second frame. The first frame is provided with an adjustment hole matching with the waist-shaped adjustment through hole, and also includes an adjustment bolt passing through the adjustment hole and the waist-shaped adjustment through hole, and an adjustment nut is threadedly connected on the adjustment bolt.

8. The heating needle coil according to claim 7, characterized in that: The telescopic adjustment rod comprises a telescopic sleeve, the end surface of the telescopic sleeve away from the adjustment collar is provided with a threaded hole, a screw rod is connected in the threaded hole, and at least one stabilizing nut is also connected to the screw rod.

9. The heating needle coil according to claim 7, characterized in that: The first caressing plate is an arc-shaped plate, the second caressing plate is a flat plate, and an arc-shaped guide plate is fixed to the feed end of the second caressing plate.

10. Winding machine, characterized in that: It comprises a heating curling needle as described in any one of claims 1-9.

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