Winding positioning device for battery roll core

Abstract

The utility model discloses a winding and positioning device for a battery roll core, which belongs to the technical field of lithium ion battery production and manufacturing and comprises an unwinding shaft, a supporting sheet is arranged on the surface of the unwinding shaft, a punching base is arranged on one side of the unwinding shaft, a punching cutter is arranged at the upper end of the punching base, a linear module is arranged on one side of the punching base, and the linear module is connected with the supporting sheet. A mechanical clamping jaw guide rail is arranged at the bottom end of the linear module, a mechanical clamping jaw base corresponding to the linear module is arranged on the surface of the mechanical clamping jaw guide rail, a mechanical clamping jaw body is arranged on the surface of the mechanical clamping jaw base, and a winding needle is arranged at the bottom end of the mechanical clamping jaw guide rail; the length of the supporting piece can be adjusted according to different battery models, after a 1 / 4 circle of the supporting piece is pre-rolled, the negative pole piece starts to be pre-rolled, so that the supporting piece is rolled into the inner circle of the roll core, the pole piece is prevented from shrinking inwards after the roll needle is pulled out, the problem of wrinkling of the pole piece can be remarkably solved, the consistency of the roll core and the cycle performance of the battery are improved, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium ion battery production and manufacturing, and specifically relates to a winding positioning device for a battery winding core. Background Art

[0002] Lithium-ion battery is a secondary battery (rechargeable battery) that mainly relies on the movement of lithium ions between the positive electrode and the negative electrode to work. During the charge and discharge process, Li+ is intercalated and deintercalated between the two electrodes: when charging, Li+ is deintercalated from the positive electrode and intercalated into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge.

[0003] With the vigorous development of the lithium battery industry, large-capacity, high-specific-energy lithium batteries have become a development trend. Therefore, the batteries are getting bigger and bigger, and the winding cores are getting thicker and thicker. Winding is a very important process in the production of battery cells. At present, it is basically completed automatically by winding machines. During the winding process, a certain tension must be applied to the pole pieces and diaphragms to ensure the neatness between the positive pole pieces, negative pole pieces, and diaphragms; however, after the winding is completed, when the winding needle is pulled out of the winding core, the positive and negative pole pieces and diaphragms undergo a stress release process, causing the pole pieces to shrink inward. After the hot pressing process, the pole pieces are wrinkled, which has an adverse effect on the performance of the pole pieces and the battery. Utility Model Content

[0004] In order to solve the problems raised in the above background technology, the utility model provides a winding positioning device for a battery winding core, which has the characteristics of strong applicability and high working efficiency.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a winding positioning device for a battery roll core, comprising a reel, a support sheet is provided on the surface of the reel, a punching base is provided on one side of the reel, a punching knife is provided on the upper end of the punching base, a linear module is provided on one side of the punching base, a mechanical clamping guide rail is provided on the bottom end of the linear module, a mechanical clamping base is provided on the surface of the mechanical clamping guide rail corresponding to the linear module, a mechanical clamping body is provided on the surface of the mechanical clamping base, and a winding needle is provided on the bottom end of the mechanical clamping guide rail.

[0006] Preferably, a funnel is arranged in the middle of the bottom end of the punching base, a recovery box is arranged at the bottom end of the funnel, and a drop pipe is arranged between the funnel and the recovery box.

[0007] Preferably, a through hole is provided inside the punching base corresponding to the punching knife, and the bottom end of the punching knife is serrated, and each serration is concave in the center and sharpened around.

[0008] Preferably, a driving block is provided on the surface of the linear module corresponding to the mechanical gripper base, and the driving block is connected and installed with the mechanical gripper base by fastening bolts.

[0009] Preferably, the support sheet is made of one or more of PE, PP and PTFE, and the surface of the support sheet is provided with breakpoint lines.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The utility model can adjust the length of the support sheet according to different battery models. After pre-rolling 1 / 4 circle of the support sheet, the negative electrode sheet begins to be pre-rolled, so that the support sheet is rolled into the inner circle of the winding core to prevent the electrode sheet from shrinking inward after the winding needle is withdrawn, which can significantly improve the wrinkling problem of the electrode sheet, improve the consistency of the winding core and the cycle performance of the battery. In addition, the entire operation process is continuous and does not require pauses or cutting, which ensures production capacity and production efficiency, is conducive to industrial application, and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the punching die structure of the utility model;

[0014] Figure 3 This is a schematic diagram of the punching knife structure of the utility model;

[0015] Figure 4 This is a schematic diagram of the support sheet structure of the utility model.

[0016] In the figure: 1. unwinding shaft; 2. supporting plate; 3. punching base; 4. funnel; 5. recycling box; 6. punching knife; 7. mechanical gripper guide rail; 8. mechanical gripper base; 9. mechanical gripper body; 10. linear module; 11. winding needle; 12. breakpoint line. DETAILED DESCRIPTION

[0017] 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 in 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.

[0018] See also Figure 1-4The utility model provides the following technical solutions: a winding positioning device for a battery roll core, comprising a reel 1, a support sheet 2 is arranged on the surface of the reel 1, a punching base 3 is arranged on one side of the reel 1, a punching knife 6 is arranged on the upper end of the punching base 3, a linear module 10 is arranged on one side of the punching base 3, a mechanical clamping guide rail 7 is arranged on the bottom end of the linear module 10, a mechanical clamping base 8 is arranged on the surface of the mechanical clamping guide rail 7 corresponding to the linear module 10, a mechanical clamping body 9 is arranged on the surface of the mechanical clamping base 8, and a winding needle 11 is arranged on the bottom end of the mechanical clamping guide rail 7.

[0019] Specifically, a funnel 4 is arranged in the middle of the bottom end of the punching base 3 , a recovery box 5 is arranged at the bottom end of the funnel 4 , and a drop pipe is arranged between the funnel 4 and the recovery box 5 .

[0020] By adopting the above technical solution, an exhaust fan is arranged inside the recovery box 5 to improve the efficiency of sucking the waste into the recovery box 5 after punching, prevent the waste from affecting subsequent punching, and ensure product quality.

[0021] Specifically, a through hole is provided inside the punching base 3 corresponding to the punching knife 6. The bottom end of the punching knife 6 is sawtooth-shaped, and each sawtooth is concave in the center and sharpened around.

[0022] By adopting the above technical solution, it is ensured that the punching knife 6 can punch the support sheet 2 quickly and accurately when in use, thereby improving work efficiency and ensuring work quality.

[0023] Specifically, a driving block is provided on the surface of the linear module 10 corresponding to the mechanical gripper base 8 , and the driving block is connected and installed with the mechanical gripper base 8 by fastening bolts.

[0024] By adopting the above technical solution, the driving stability of the mechanical gripper base 8 is ensured and the use quality of the equipment is improved.

[0025] Specifically, the material of the support sheet 2 is one or more of PE, PP, and PTFE, and the surface of the support sheet 2 is provided with breakpoint lines 12 .

[0026] By adopting the above technical solution, the working time interval of the punching knife 6 is set, and the breakpoint line 12 can be punched out on the surface of the support sheet 2 at fixed time intervals.

[0027] The mechanical clamp body 9 in the present invention is an existing disclosed technology, and the selected model is MHZ2-10D.

[0028] The working principle and use process of the utility model: when the utility model is in use, the mechanical clamp body 9 clamps the support sheet 2 above the breakpoint line 12, and moves downward along the mechanical clamp guide rail 7 under the drive of the linear module 10. As the winding needle 11 rotates, the support sheet 2 is gradually rolled into the winding core. When the support sheet 2 is rolled into the winding core and fixed, the mechanical clamp body 9 stops moving, and the winding needle 11 continues to rotate. The support sheet 2 is broken along the breakpoint line 12 under the pull of the mechanical clamp body 9 and the winding needle 11, and this section of the support sheet 2 is then rolled into the winding core. When the mechanical clamp body 9 stops moving downward, the punching knife 6 moves downward and punches a breakpoint line 12 on the support sheet 2. The exhaust fan inside the recycling box 5 sucks in the waste. At the same time, the mechanical clamp body 9 opens, and moves upward to the breakpoint line 12 under the action of the linear module 10 and stops. The mechanical clamp body 9 clamps and feeds the support sheet 2 again, and the work is repeated.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A winding and positioning device for a battery core, comprising a reeling shaft, characterized in that: A support plate is provided on the surface of the unwinding shaft, a punching base is provided on one side of the unwinding shaft, a punching knife is provided on the upper end of the punching base, a linear module is provided on one side of the punching base, a mechanical clamping guide rail is provided on the bottom end of the linear module, a mechanical clamping base is provided on the surface of the mechanical clamping guide rail corresponding to the linear module, a mechanical clamping body is provided on the surface of the mechanical clamping base, and a winding needle is provided on the bottom end of the mechanical clamping guide rail.

2. The winding and positioning device of a battery winding core according to claim 1, characterized in that: A funnel is arranged in the middle of the bottom end of the punching base, a recovery box is arranged at the bottom end of the funnel, and a material dropping pipe is arranged between the funnel and the recovery box.

3. The winding and positioning device of a battery winding core according to claim 1, characterized in that: The inside of the punching base is provided with a through hole corresponding to the punching knife, and the bottom end of the punching knife is sawtooth-shaped, and each sawtooth is concave in the center and has blades around it.

4. The winding and positioning device of a battery winding core according to claim 1, characterized in that: A driving block is provided on the surface of the linear module corresponding to the mechanical gripper base, and the driving block is connected and installed with the mechanical gripper base by fastening bolts.

5. The winding and positioning device of a battery winding core according to claim 1, characterized in that: The material of the support sheet is one or more of PE, PP and PTFE, and the surface of the support sheet is provided with breakpoint lines.

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