Battery winding needle and winding core processing equipment

Abstract

The utility model provides a winding needle for winding a battery, which comprises a winding needle body, a winding needle core and a winding needle core, a plurality of first air guide through holes are formed in the surface of the pole piece placing area, and a plurality of second air guide through holes are formed in the surface of the tab placing area; and the at least one air guide channel is arranged in the winding needle body, and the at least one air guide channel is communicated with the plurality of first air guide through holes and the plurality of second air guide through holes. According to the winding needle, the winding core is wound through the winding needle body, the pole piece placing area is used for fixing the winding needle and the winding core during winding, the pole lug placing area is used for assisting in winding the pole lug and preventing the pole lug from being inserted inversely, and therefore the winding needle can stably fix the winding core during winding and prevent the winding core from misplacing and slipping, an air flow layer can be formed during needle disengaging, and the winding needle is prevented from falling off. And adverse effects caused by core pulling due to adhesion between the inner-layer pole piece and the winding needle are prevented, so that the winding core can be completely taken off conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of battery processing, in particular to a battery winding needle and winding core processing equipment. Background Art

[0002] The core winding process is an indispensable part of the battery production process. The battery core is usually a multi-layer structure of diaphragm-anode sheet-diaphragm-cathode sheet. During the core processing process, the multi-layer structure needs to be attached to the surface of the winding needle, and the winding needle drives it to rotate synchronously clockwise or counterclockwise for winding. After the roll is formed, the winding needle is pulled out to form a core. After hot pressing, the core is a bare battery cell (Jellyroll). Conventional winding methods are as follows: Figure 1 shown.

[0003] At present, in the process of core processing, the ability of each layer of core structure and the winding needle to continuously wind relatively fixedly is the primary factor affecting the core quality. In particular, if slippage and misalignment occur between the innermost layer of diaphragm and the winding needle, then on the one hand, the thickness of the processed core is difficult to meet the actual application requirements. On the other hand, wrinkles and deformation are also likely to occur inside the processed core, which seriously affects the yield rate of the core.

[0004] After the core is formed on the winding needle, it is necessary to ensure that the core can be completely removed when the two are separated. However, when the core is removed, its innermost structure will fit tightly to the surface of the winding needle due to the squeezing of the outer structure. Then, when the winding needle is pulled out, the friction between it and the winding needle can easily cause the inner diaphragm and even the pole piece to be stuck and pulled out by the winding needle. Such a core needs to be post-processed or reprocessed, which greatly increases the processing burden of the core. Summary of the invention

[0005] To this end, the technical problem to be solved by the utility model is to overcome the problems in the prior art that the core layer structure and the winding needle are easy to slip during winding processing, and the core is easy to stick when the winding needle is pulled out, and to provide a battery winding needle and core processing equipment.

[0006] In order to solve the above-mentioned technical problems, the utility model provides a battery winding needle, which includes: a winding needle body, the winding needle body includes a pole piece placement area and a pole ear placement area; a plurality of first air guide holes are arranged on the surface of the pole piece placement area, and a plurality of second air guide holes are arranged on the surface of the pole ear placement area; at least one air guide channel, at least one of the air guide channels is arranged inside the winding needle body, and the at least one air guide channel is interconnected with the plurality of the first air guide holes and the plurality of the second air guide holes.

[0007] In one embodiment of the utility model, the first air-conducting holes are evenly spaced on the pole piece placement area, the second air-conducting holes are evenly spaced on the pole ear placement area, the spacing distance between any two adjacent first air-conducting holes is not less than the equivalent length of the corresponding first air-conducting holes, and the spacing distance between any two adjacent second air-conducting holes is not less than the equivalent length of the corresponding second air-conducting holes.

[0008] In one embodiment of the utility model, the first gas conducting hole is configured as follows: the direction of the gas flowing out through the first gas conducting hole is a first direction, and the first direction is perpendicular to the surface of the pole piece placement area; the second gas conducting hole is configured as follows: the direction of the gas flowing out through the second gas conducting hole is a second direction, and the second direction is inclined from the gas conducting channel to the outer surface of the pole ear placement area and towards a direction away from the pole piece placement area.

[0009] In one embodiment of the present invention, an angle α between an extension direction of the second air-conducting through hole and a direction parallel to the outer surface of the tab placement area is 30° to 60°.

[0010] In one embodiment of the present invention, the gas flow rate in the first gas-conducting through hole is V1, the gas flow rate in the second gas-conducting through hole is V2, and V2=V1 / sinα.

[0011] In one embodiment of the utility model, there is one air guiding channel; the air guiding channel includes a first air guiding section and a second air guiding section arranged in sequence; the first air guiding section is connected to the first air guiding hole, and the second air guiding section is connected to the second air guiding hole; the first air guiding section and the second air guiding section are connected via an openable and closable solenoid valve.

[0012] In one embodiment of the utility model, there is one air guiding channel; the air guiding channel includes a first air guiding segment and a second air guiding segment which are interconnected; the first air guiding segment is connected to the first air guiding hole, and the second air guiding segment is connected to the second air guiding hole; the aperture of the first air guiding segment is smaller than the aperture of the second air guiding segment.

[0013] In an embodiment of the present invention, when there are two air guiding channels, the two air guiding channels are independently provided and are connected to the first air guiding through hole and the second air guiding through hole respectively.

[0014] In one embodiment of the present invention, the area of ​​the air guide hole on the outer surface of the needle body is 0.1 mm 2 ~1cm 2 .

[0015] In one embodiment of the present invention, the plurality of first air guiding holes include air inlet holes and air outlet holes and / or the plurality of second air guiding holes include air inlet holes and air outlet holes, and the air inlet holes and the air outlet holes are respectively connected to different air guiding channels.

[0016] In order to solve the above technical problems, the utility model also provides a core processing device, which includes the above-mentioned battery winding needle.

[0017] The above technical solution of the utility model has the following advantages compared with the prior art:

[0018] The battery winding needle and core processing equipment of the present invention performs winding processing on the core through the winding needle body, wherein the pole piece placement area is used for winding the pole piece to realize the fixing effect between the winding core and the winding needle, and the pole ear placement area is used for assisting in winding the thin and soft pole ears to prevent the risk of the pole ears being inserted inward during the winding or needle extraction process. During this process, the air guide channel can inhale or release air to the first air guide hole and / or the second air guide hole. Therefore, the present application can not only stably fix the core during winding to prevent the core from being misplaced and slipping, but also form an air flow layer when removing the needle to prevent the adverse effects caused by the adhesion and core extraction between the inner pole piece and the winding needle, thereby facilitating the complete removal of the core. The present invention is a new type of battery winding needle and core processing equipment that can save processing time, increase processing efficiency, and improve processing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments of the utility model in combination with the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the existing conventional winding core;

[0021] Figure 2 It is a schematic diagram of the structure of a battery winding needle in a preferred embodiment of the utility model;

[0022] Figure 3 yes Figure 2 Schematic diagram of the cross section at AA;

[0023] Figure 4 yes Figure 2 Schematic diagram of the deformation of the middle ear when it is blown;

[0024] Figure 5 It is a schematic structural diagram of a battery winding needle in another embodiment of the utility model;

[0025] Figure 6 It is a schematic structural diagram of a battery winding needle in the third embodiment of the utility model.

[0026] Explanation of the reference numerals in the drawings in the specification: 100, winding needle body; 110, winding portion; 111, pole piece placement area; 112, pole ear placement area; 1131, first air guide hole; 1132, second air guide hole; 1133, air outlet hole; 1134, air inlet hole; 120, mounting portion; 200, air guide channel; 300, winding core; 310, winding core body; 320, pole ear. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0028] Embodiment 1

[0029] See also Figure 1 As shown, the present embodiment provides a battery winding needle, which includes: a winding needle body 100, the winding needle body 100 includes a pole piece placement area 111 and a pole ear placement area 112; a plurality of first air conducting holes 1131 are arranged on the surface of the pole piece placement area 111, and a plurality of second air conducting holes 1132 are arranged on the surface of the pole ear placement area 112; at least one air conducting channel 200, at least one air conducting channel 200 is arranged inside the winding needle body 100, and at least one air conducting channel 200 is interconnected with the plurality of first air conducting holes 1131 and the plurality of second air conducting holes 1132.

[0030] The battery winding needle of the present invention performs winding processing on the winding core 300 through the winding needle body 100, wherein the pole piece placement area 111 is used to wind the pole piece 310 to achieve the fixing effect between the winding core 300 and the winding needle, and the pole ear placement area 112 is used to assist in winding the thin and soft pole ear 320 to prevent the pole ear 320 from being inserted inward during the winding or needle withdrawal process. During this process, the air guide channel 200 can inhale or release air to the first air guide hole 1131 and / or the second air guide hole 1132. Therefore, the present application can not only stably fix the winding core 300 during winding to prevent the winding core 300 from being misplaced and slipping, but also form an air flow layer when removing the needle to prevent the adverse effects caused by the adhesion and core pulling between the inner pole piece 310 and the winding needle, thereby facilitating the complete removal of the winding core 300. It is a new type of battery winding needle that can save processing time, increase processing efficiency, and improve processing quality.

[0031] In this embodiment, the middle section of the core 300 body is a winding portion 110 for winding the core 300, and at both ends of the winding portion 110 are mounting portions 120 for connecting to an external rotating drive device. In this embodiment, the pole piece placement area 111 and the pole ear placement area 112 together constitute the winding portion 110; the core 300 body can be connected to an external rotating device through a mounting portion 120 at one end, or it can be connected to an external rotating device at the same time through two mounting portions 120 at both ends to improve the winding stability.

[0032] See also Figure 2 As shown, the first gas conducting holes 1131 are evenly spaced on the pole piece placement area 111, the second gas conducting holes 1132 are evenly spaced on the pole ear placement area 112, the spacing distance between any two adjacent first gas conducting holes 1131 is not less than the equivalent length of the corresponding first gas conducting holes 1131, and the spacing distance between any two adjacent second gas conducting holes 1132 is not less than the equivalent length of the corresponding second gas conducting holes 1132. Furthermore, under the premise that the overall air supply flow rate and the internal diameter of the first air conducting hole 1131 are constant, the smaller the spacing between two adjacent first air conducting holes 1131, the smaller the air flow rate inside any first air conducting hole 1131. When the spacing between any two adjacent first air conducting holes 1131 is less than its equivalent length, the internal resistance of the first air conducting hole 1131 will make it difficult for the gas to flow out, and the same is true for the second air conducting hole 1132. Therefore, this structural setting in the present application can always ensure that the gas inside the first air conducting hole 1131 and the second air conducting hole 1132 can flow smoothly, thereby avoiding the problem of partial or complete failure of the first air conducting hole 1131 or the second air conducting hole 1132. In this embodiment, the area of ​​the first air conducting hole 1131 and the second air conducting hole 1132 located on the outer surface of the winding needle body 100 is 0.5 cm 2 , multiple first air conducting holes 1131 are evenly distributed in the length and width directions of the pole piece placement area 111. Similarly, multiple second air conducting holes 1132 are also evenly distributed in the length and width directions of the pole ear placement area 112. Any first air conducting hole 1131 and any second air conducting hole 1132 have both air intake and air exhaust functions. Therefore, when the first air conducting hole 1131 is in the air intake state, the core 300 can be firmly adsorbed on the surface of the winding needle to ensure the stability of the winding process and thus improve the winding quality. When the first air conducting hole 1131 and the second air conducting hole 1132 are in the air exhaust state, an air flow layer can be formed between the core 300 and the winding needle body 100 to lift the core 300, so that the core 300 can be smoothly separated from the body 100, thereby avoiding the problem of core pulling when the needle is removed. In other embodiments, the area of ​​the first air-conducting through hole 1131 and the second air-conducting through hole 1132 on the outer surface of the winding needle body 100 may be 0.1 mm 2~1cm 2 The present invention does not make any specific limitation on this.

[0033] See also Figure 3 As shown, the first gas conducting hole 1131 is configured as follows: the direction of the gas flowing out through the first gas conducting hole 1131 is a first direction, and the first direction is perpendicular to the surface of the pole piece placement area 111; the second gas conducting hole 1132 is configured as follows: the direction of the gas flowing out through the second gas conducting hole 1132 is a second direction, and the second direction is inclined from the gas conducting channel 200 to the outer surface of the pole ear placement area 112 and towards a direction away from the pole piece placement area 111. In this embodiment, the first air guide hole 1131 perpendicular to the surface of the electrode placement area 111 can output an airflow perpendicular to the surface of the winding core 300 wound on the winding needle body 100, thereby forming a uniform airflow belt between the winding core 300 and the winding needle, and the second air guide hole 1132 arranged obliquely can output an airflow in the second direction to the pole ear 320, so that the pole ear 320 can be lifted upward under the action of this airflow, thereby achieving the purpose of preventing the pole ear 320 from being reversed. In this embodiment, the specific blowing effect of the first air guide hole and the second air guide hole on the winding core 300 when the air is discharged can be seen in Figure 4 Further, in order to improve the guiding effect on the gas, in this embodiment, the cross-sectional shape of the first gas-guiding through hole 1131 is set to a rectangle, and the cross-sectional shape of the second gas-guiding through hole 1132 is set to a parallelogram, thereby further improving the guiding effect on the internal airflow, so as to achieve the purpose of lifting the tab 320.

[0034] Specifically, the acute angle α between the extension direction of the second gas conducting hole 1132 and the direction parallel to the pole ear placement area 112 is 30° to 60°, the gas flow rate in the first gas conducting hole 1131 is V1, the gas flow rate in the second gas conducting hole 1132 is V2, and V2=V1 / sinα. In this embodiment, the angle of α is 30°, V2=1 / 2V1, thereby ensuring that V2 is always greater than V1, and thus the gas flow rate flowing in the first gas conducting hole 1131 and the second gas conducting hole 1132 will not be significantly different, thereby achieving the purpose of fixing or detaching the winding core 300 without damaging the pole ear 320. In actual use, the angle α can be set to other angles according to actual use requirements, and accordingly, V2 can be equal to 1 / 2V1~√3 / 2V1.

[0035] In the present embodiment, there is one air guide channel 200; the air guide channel 200 includes a first air guide section and a second air guide section which are arranged in sequence; the first air guide section is connected to the first air guide hole 1131, and the second air guide section is connected to the second air guide hole 1132; the first air guide section and the second air guide section are connected via an openable and closable electromagnetic valve, and the air guide channel 200 is connected to an external air supply and suction device, wherein the first air guide section is used to supply and suction air to the first air guide hole 1131, and the second air guide section is used to supply and suction air to the second air guide hole 1132. The electromagnetic valve is arranged between the first air guide section and the second air guide section, so that the synchronous suction or supply of the first air guide hole 1131 and the second air guide hole 1132 can be realized, and it can also be realized that only one of the first air guide hole 1131 and the second air guide hole 1132 is supplied with air or suctioned. During the process, the pole piece 310 is mainly fixed by the fit between the pole piece placement area 111. Therefore, when the air guide channel 200 is in the air intake state, the winding core 300 can be stably fitted to the winding needle surface for a long time only through the cooperation between the first air guide section and the first air guide hole 1131. At this time, the second air guide section can be adjusted to a non-working state through the solenoid valve, which not only saves energy but also enables precise control of the air intake amount in the first air guide section. When the air guide channel 200 is in the air outlet state, both the first air guide section and the second air guide section need to be supplied with air. At this time, the first air guide section and the second air guide section can be connected to each other by adjusting the solenoid valve, and the first air guide hole 1131 and the second air guide hole 1132 can be synchronously supplied with air through the air supply channel, thereby achieving the purpose of preventing the pole ear 320 from being inserted inverted while smoothly detaching from the winding core 300. Furthermore, the solenoid valve in this embodiment can be connected to an external control device for parameter setting, and can also be adjusted in real time according to actual usage during use. At the same time, the opening of the solenoid valve can be used to control the gas supply channel to adjust the actual gas flow inside it, thereby further improving the flexibility of use of the battery winding needle.

[0036] Embodiment 2

[0037] The present embodiment provides another battery winding needle, and the structural setting of its winding needle body 100 is the same as that in the first embodiment, and no further details are given here. In the present embodiment, the air guide channel 200 is still one; but the air guide channel 200 includes a first air guide section and a second air guide section that are interconnected; the first air guide section is connected to the first air guide hole 1131, and the second air guide section is connected to the second air guide hole 1132, and the aperture of the first air guide section is smaller than the aperture of the second air guide section. In this structural setting, the first air guide section and the second air guide section need to supply or absorb air synchronously, but because the aperture of the first air guide section is smaller, under the condition of the same air supply amount, the gas flow rate in the first air guide hole 1131 connected to the first air guide section is faster, so the top blowing intensity of the pole piece placement area 111 during air supply and the suction force during air suction are both greater than those of the pole ear placement area 112. Therefore, the present embodiment can simplify the connection structure under the premise of achieving stable overall processing of the winding core 300, thereby reducing production and use costs.

[0038] Embodiment 3

[0039] This embodiment provides another battery winding needle, and the structure of the winding needle body 100 is the same as that in the first embodiment, and no further details are given here. There are two air guide channels 200 in this embodiment, and the two air guide channels 200 are independently arranged and respectively connected to the first air guide hole 1131 and the second air guide hole 1132. Furthermore, the two air guide channels 200 are independently connected to the air supply and suction equipment, thereby, the operator can control the two air guide channels 200 respectively, and further improve the accuracy of the gas flow direction and gas flow in the first air guide hole 1131 and the second air guide hole 1132, thereby improving the flexibility and effect of the battery winding needle.

[0040] Embodiment 4

[0041] See also Figure 5 As shown, the present embodiment provides another battery winding needle, wherein the diameter and arrangement density of the first air conducting holes 1131 on the pole piece placement area 111 are greater than the diameter and arrangement density of the second air conducting holes 1131 on the pole ear placement area 112, thereby enabling the plurality of second air conducting holes 1132 to disperse the gas to a greater extent under the premise of a certain overall gas supply flow rate, and thereby enabling the second air conducting holes 1132 to blow and suck the pole ear 320 with less intensity than the first air conducting holes 1131 to blow and suck the pole piece 310 when the winding needle body 100 is subjected to gas flow, thereby avoiding damage to the pole ear 320 due to excessive airflow or failure to fix the winding core 300 or detach from the winding core 300 due to too small airflow.

[0042] Embodiment 5

[0043] See also Figure 6As shown, this embodiment provides another battery winding needle, multiple first air conducting holes 1131 include air inlet holes 1134 and air outlet holes 1133 and / or multiple second air conducting holes 1132 include air inlet holes 1134 and air outlet holes 1133, and the air inlet holes 1134 and the air outlet holes 1133 are respectively connected to different air conducting channels 200. In this embodiment, the plurality of first air-conducting through holes 1131 include air inlet holes 1134 and air outlet holes 1133, and the plurality of second air-conducting through holes 1132 include air inlet holes 1134 and air outlet holes 1133. The air inlet holes 1134 and air outlet holes 1133 on the pole piece placement area 111 and the pole ear placement area 112 are configured to be evenly and alternately arranged. Further, in this embodiment, the arrangement density and manner of the air inlet holes 1134 and air outlet holes 1133 on the pole ear placement area 112 and the pole piece placement area 111 are the same, wherein the air inlet holes 1134 are smaller in cross-sectional area. The circular through hole is connected to an air suction device through an air guide channel 200, and the air outlet hole 1133 is a rectangular through hole with a larger cross-street area, which is connected to an air supply device through another air guide channel 200. The two air guide channels 200 are independently controlled. When winding and fixing, the pole piece 310 is tightly attached to the surface of the winding needle through the suction effect of the air inlet. When separating from the winding core 300, the pole ear 320 and the pole piece 310 are completely separated from the winding needle through the airflow layer formed by the air outlet, so as to achieve the purpose of improving the processing efficiency and processing quality of the winding core 300 in the present application.

[0044] Embodiment 6

[0045] The present embodiment provides a core processing device, which includes the battery winding needle and the rotary drive mechanism in the first embodiment, wherein the rotary drive mechanism is connected to an installation portion 120 of the winding needle body 100, and can drive the winding needle body 100 and the core 300 thereon to rotate synchronously. Furthermore, the rotary drive mechanism in the present embodiment can be a rotary motor, a rotary cylinder or other equipment with a rotary drive function, which can form a detachable connection relationship with the core body 100 through any structure, and the present invention does not impose specific restrictions on this.

[0046] In summary, the battery winding needle and winding core processing equipment of the utility model uses the winding needle body 100 to wind the winding core 300, wherein the pole piece placement area 111 is used to wind the pole piece 310 to achieve the fixing effect between the winding core 300 and the winding needle, and the pole ear placement area 112 is used to assist in winding the thin and soft pole ear 320 to prevent the pole ear 320 from being inserted inward during the winding or needle extraction process. In this process, the air guide channel 200 can be directed to the first air guide hole 1 131 and / or the second air guide hole 1132 are used to inhale or release air. Therefore, the present application can not only stably fix the core 300 during winding to prevent the core 300 from slipping and misalignment during winding, but also form an air flow layer during needle removal to prevent the adverse effects caused by the adhesion between the inner pole piece 310 and the winding needle, thereby facilitating the complete removal of the core 300. The present application is a new type of battery winding needle and core processing equipment that can save processing time, increase processing efficiency, and improve processing quality.

[0047] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. A battery winding needle, characterized in that: include: A winding needle body (100), the winding needle body (100) comprising a pole piece placement area (111) and a pole ear placement area (112); a plurality of first air conduction holes (1131) are arranged on the surface of the pole piece placement area (111), and a plurality of second air conduction holes (1132) are arranged on the surface of the pole ear placement area (112); At least one air guide channel (200), at least one of the air guide channels (200) is arranged inside the needle winding body (100), and the at least one air guide channel (200) is interconnected with the plurality of the first air guide holes (1131) and the plurality of the second air guide holes (1132).

2. The battery winding needle according to claim 1, characterized in that: The first air-conducting through holes (1131) are evenly spaced on the pole piece placement area (111), and the second air-conducting through holes (1132) are evenly spaced on the pole ear placement area (112). The spacing distance between any two adjacent first air-conducting through holes (1131) is not less than the equivalent length of the corresponding first air-conducting through holes (1131), and the spacing distance between any two adjacent second air-conducting through holes (1132) is not less than the equivalent length of the corresponding second air-conducting through holes (1132).

3. The battery winding needle according to claim 1 or 2, characterized in that: The first gas conducting hole (1131) is configured as follows: the direction of the gas flowing out through the first gas conducting hole (1131) is a first direction, and the first direction is perpendicular to the surface of the pole piece placement area (111); the second gas conducting hole (1132) is configured as follows: the direction of the gas flowing out through the second gas conducting hole (1132) is a second direction, and the second direction is inclined from the gas conducting channel (200) to the outer surface of the pole lug placement area (112) and towards a direction away from the pole piece placement area (111).

4. The battery winding needle according to claim 3, characterized in that: The angle α between the extension direction of the second air-conducting through hole (1132) and the direction parallel to the outer surface of the tab placement area (112) is 30° to 60°.

5. The battery winding needle according to claim 4, characterized in that: The gas flow rate in the first gas-conducting through hole (1131) is V1, the gas flow rate in the second gas-conducting through hole (1132) is V2, and V2=V1 / sinα.

6. The battery winding needle according to claim 1 or 2, characterized in that: The air guide channel (200) is one; the air guide channel comprises a first air guide section and a second air guide section which are arranged in sequence; the first air guide section is connected to the first air guide hole (1131), and the second air guide section is connected to the second air guide hole (1132); the first air guide section and the second air guide section are connected via an openable and closable electromagnetic valve.

7. The battery winding needle according to claim 1 or 2, characterized in that: The air guiding channel (200) is one; the air guiding channel comprises a first air guiding section and a second air guiding section which are connected to each other; the first air guiding section is connected to the first air guiding hole (1131), and the second air guiding section is connected to the second air guiding hole (1132); the aperture of the first air guiding section is smaller than the aperture of the second air guiding section.

8. The battery winding needle according to claim 1 or 2, characterized in that: When there are two air guiding channels (200), the two air guiding channels (200) are independently arranged and are respectively connected to the first air guiding through hole (1131) and the second air guiding through hole (1132).

9. The battery winding needle according to claim 1 or 2, characterized in that: The area of ​​the air-conducting through hole (113) located on the outer surface of the needle winding body (100) is 0.1 mm 2 ~1cm 2 .

10. The battery winding needle according to claim 1, characterized in that: The plurality of first air-conducting through holes (1131) include an air inlet hole (1134) and an air outlet hole (1133) and / or the plurality of second air-conducting through holes (1132) include an air inlet hole (1134) and an air outlet hole (1133), and the air inlet hole (1134) and the air outlet hole (1133) are respectively connected to different air-conducting channels (200).

11. A core processing device, characterized in that: A battery winding needle comprising the battery winding needle according to any one of claims 1 to 10.

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