Cell production equipment

Abstract

The present invention is applicable to the field of wire production and provides a core production device for producing the core of a wire. The core includes a fixed conduit and granular conductive medium filled in the fixed conduit, and the fixed conduit is made of extruded material. The core production device includes: a filling unit, including an extrusion die tube and a first screw. The first screw rotates to extrude the conductive medium located in the extrusion die tube and discharge it through a first extrusion port; an extrusion unit, including a melting part, a head die and a forming part. The melting part transports the melted extruded material to the head die. The forming part includes a conveying pipe and a cooling structure. The conveying pipe is tubular and sleeved on the outer peripheral side of the extrusion die tube, and the conveying pipe has a second extrusion port. Among them, the first extrusion port and the second extrusion port are arranged in the same plane. The core production device provided by the present invention can achieve the effect of extruding the fixed conduit while filling the conductive medium.

Description

Technical Field

[0001] The present invention belongs to the technical field of wire production equipment, and more specifically, relates to a core production equipment. Background Art

[0002] To improve the problem of metal fatigue caused by the repeated movement or bending of wires, a utility model patent with the application number 201921665233.8 discloses a wire, which includes a core and a connection structure. The core includes a fixed conduit and a conductive medium. The fixed conduit is made of a flexible material, extends forward and backward, and has a receiving cavity that penetrates through the front and back; the conductive medium is composed of a plurality of granular conductive particles that fill the receiving cavity; the connection structure includes a first connector and a second connector for closing the two end faces of the fixed conduit. Both the first connector and the second connector are made of conductive materials and are in contact with the conductive medium; wherein, each conductive particle is jointly used to receive the current from the first connector and transfer it to the second connector or transfer the current from the second connector to the first connector.

[0003] For the core of the above wire, since the conductive medium is granular, the existing extruder is difficult to produce and prepare this core. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, and provides a core production equipment, which aims to produce a core composed of a fixed conduit and a conductive medium.

[0005] To achieve the above purpose, the embodiments of the present invention provide the following technical solutions:

[0006] A core production equipment for producing the core of a wire, the core includes a fixed conduit and a conductive medium filled in the fixed conduit. The fixed conduit is made of an extruded material, and the conductive medium is granular; the core production equipment includes:

[0007] A filling unit, including an extrusion die tube and a first screw disposed inside the extrusion die tube. The extrusion die tube is for placing the conductive medium and has a first extrusion port for the conductive medium to move out. The first screw rotates to extrude the conductive medium located in the extrusion die tube and push it out of the extrusion die tube through the first extrusion port;

[0008] An extrusion unit, including a melting part, a head die, and a forming part. The melting part is for placing the extruded material, melting the extruded material, and transporting the melted extruded material to the head die. The forming part includes a conveying pipe connecting the head die and a cooling structure for cooling the extruded material located in the conveying pipe. The conveying pipe is tubular and sleeved on the outer peripheral side of the extrusion die tube, and the conveying pipe has a second extrusion port facing away from the head die;

[0009] Among them, the first extrusion port and the second extrusion port are arranged coplanarly. The extrusion material is extruded from the second extrusion port to form the fixed conduit, and the conductive medium is extruded from the first extrusion port and filled into the fixed conduit.

[0010] Optionally, the die sleeve of the head is sleeved on the outer peripheral side of the extrusion die tube and has an annular first cavity, and the first cavity communicates with the conveying pipe and the melting part.

[0011] Optionally, the outer cavity wall of the first cavity and the inner pipe wall of the conveying pipe are coaxially and equidiameterly arranged.

[0012] Optionally, the melting part includes a sleeve sleeved outside the extrusion die tube and a second screw arranged between the sleeve and the extrusion die tube. The second screw rotates to drive the extrusion material to move towards the die sleeve of the head.

[0013] Optionally, the first screw and the second screw are coaxially arranged and the ratio of the rotational angular velocities is constant.

[0014] Optionally, the total volume of the conductive medium extruded from the first extrusion port per unit time is not less than the volume of the internal space enclosed by the fixed conduit extruded from the second extrusion port.

[0015] Optionally, the cross-sectional dimensions of the conveying pipe and the sleeve are the same;

[0016] The first screw and the second screw satisfy: P1*W1 > P2*W2, where P1 is the pitch of the first screw, W1 is the angular velocity of the first screw, P2 is the pitch of the second screw, and W2 is the angular velocity of the second screw.

[0017] Optionally, the filling unit includes a material box, the material box has a storage cavity for accommodating the conductive medium, the storage cavity communicates with the extrusion die tube, and the volume of the storage cavity can be adjusted according to the volume of the conductive medium located in the material box.

[0018] Optionally, the material box is provided with an air extraction port, and an air extraction pump is provided at the air extraction port.

[0019] Optionally, a filter screen is provided at the air extraction port.

[0020] Optionally, the material box is arranged above the extrusion die tube, and the cross-section of the material box in the height direction is in a corrugated shape extending up and down.

[0021] The cell production equipment provided by the present invention can prepare a cell composed of granular conductive medium and fixed conduit. Through the coordinated setting of the filling unit and the extrusion unit, the effect of filling the conductive medium while extruding the fixed conduit is achieved. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic structural diagram of the wire in the embodiment of the present invention;

[0024] Figure 2 It is a schematic structural diagram of the cell production equipment provided by the embodiment of the present invention, which is a sectional view;

[0025] Figure 3 It is a schematic structural diagram of the extrusion unit and the filling unit in the embodiment of the present invention, which is a sectional view;

[0026] Figure 4 is Figure 2 an enlarged view of part A in

[0027] Among them, the reference numerals in the drawings are as follows:

[0028] 10. Wire; 11. Fixed conduit; 12. Conductive medium; 13. First connector; 14. Second connector; 20. Filling unit; 21. Extrusion die tube; 201. First extrusion port; 22. First screw; 23. Feed hopper; 202. Air extraction port; 30. Extrusion unit; 31. Melting part; 311. Sleeve; 312. Second screw; 32. Head die; 302. First cavity; 33. Forming part; 331. Delivery pipe; 301. Second extrusion port; 332. Cooling structure; 34. Storage bin. Detailed Embodiments

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the following further details the present invention in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0031] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0032] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0033] Please refer to Figures 2 to 4 , and an exemplary description will be given to the cell production equipment provided in the present application. The cell production equipment provided in this embodiment is used to produce the cell of wire 10.

[0034] Please refer to Figure 1 , wire 10 includes a cell and a connection structure. For the convenience of description, the extending direction of wire 10 is defined as the front-rear direction. The cell includes a fixed conduit 11 and a conductive medium 12. The fixed conduit 11 is made of a flexible material, extends in the front and rear directions and has a receiving cavity that penetrates through the front and rear; the conductive medium 12 is composed of a plurality of particulate conductive particles that fill the receiving cavity; the connection structure includes a first connector 13 and a second connector 14 for closing the two end faces of the fixed conduit 11. Both the first connector 13 and the second connector 14 are made of conductive materials and are in contact with the conductive medium 12; wherein, each conductive particle is jointly used to receive the current from the first connector 13 and transfer it to the second connector 14 or transfer the current from the second connector 14 to the first connector 13.

[0035] The fixed conduit 11 and the connection structure enclose to fix each conductive particle. The connection structure and each conductive particle together form a structure for conducting electricity to achieve the conductive function. Since the conductive medium 12 is in particulate form, when the fixed conduit 11 is deformed under pressure, each conductive particle can make an adaptive movement to adapt to the change of the fixed conduit 11. Therefore, using particulate conductive particles as the conductive medium 12 can solve the problem of damage to the conductor due to reciprocating movement.

[0036] In this embodiment, the conductive medium 12 is a mixture of conductive balls and graphite powder. The conductive balls are spherical. The conductive balls are all made of metal materials with excellent electrical conductivity, such as copper, aluminum, steel, etc., or composite materials such as conductive plastics and conductive rubbers, and can also be made of solid solution alloy materials, such as gallium indium alloy. The graphite powder is filled between the accommodating cavity and the conductive balls. On the one hand, it plays a role in conducting electricity. The graphite powder and the conductive balls together form a conductor, filling the entire accommodating cavity to ensure smooth current conduction. On the other hand, it can play a role in lubrication and support. The graphite powder and the conductive balls jointly provide support for the fixed conduit 11, thereby reducing the stress concentration when the fixed conduit 11 is pressed. The addition of the graphite powder can reduce the friction force of the conductive balls rolling, enabling each conductive ball to make corresponding shape adjustments more quickly according to the external force situation.

[0037] In this embodiment, the fixed conduit 11 is made of rubber material and has certain elasticity.

[0038] The battery cell production equipment provided in this embodiment is used to produce the battery cell of the wire 10. After the battery cell is prepared, the two ends of the battery cell are respectively connected to the first connector 13 and the second connector 14 by plugging or other means to complete the production of the wire 10.

[0039] Please refer to Figure 2 and Figure 3 , in this embodiment, the battery cell production equipment includes an extrusion unit 30 and a filling unit 20. The extrusion unit 30 is used to prepare the fixed conduit 11, and the filling unit 20 is used to fill the conductive medium 12 into the fixed conduit 11.

[0040] The filling unit 20 includes an extrusion die tube 21 and a first screw 22 disposed inside the extrusion die tube 21. The extrusion die tube 21 has a feeding port for the conductive medium 12 to be placed and a first extrusion port 201 for the conductive medium 12 to be discharged. The first screw 22 rotates to be able to extrude the conductive medium 12 located inside the extrusion die tube 21 and push it out of the extrusion die tube 21 through the first extrusion port 201. In the illustrated structure, the extrusion die tube 21 and the first screw 22 extend in the front-rear direction. The feeding port is opened on the side surface of the extrusion die tube 21 and communicates with the material box 23 for loading the conductive medium 12. The first extrusion port 201 is disposed on the front end surface in the extending direction of the first screw 22. The first screw 22 rotates to be able to push the conductive medium 12 located inside the extrusion die tube 21 forward to the first extrusion port 201.

[0041] The extrusion unit 30 includes a melting part 31, a die head 32 and a forming part 33. The melting part 31 is for placing the extrusion material and melting the extrusion material and conveying the melted extrusion material to the die head 32. The forming part 33 includes a conveying pipe 331 connected to the die head 32 and a cooling structure 332 for cooling the extrusion material located in the conveying pipe 331. The conveying pipe 331 is tubular and sleeved on the outer peripheral side of the extrusion die pipe 21, and the conveying pipe 331 has a second extrusion outlet 301 facing away from the die head 32.

[0042] Wherein, the first extrusion outlet 201 and the second extrusion outlet 301 are arranged in the same plane. The extrusion material is extruded from the second extrusion outlet 301 to form a fixed conduit 11, and the conductive medium 12 is extruded from the first extrusion outlet 201 and filled in the fixed conduit 11.

[0043] It can be understood that the extrusion unit 30 further includes a silo 34. The extrusion material is rubber particles and is placed in the silo 34. The melting part 31 includes a sleeve 311 and a second screw 312 arranged between the sleeve 311 and the extrusion die pipe 21. The lower end opening of the silo 34 is communicated with the sleeve 311. The extrusion material enters the sleeve 311 through the lower end opening of the silo 34, and the second screw 312 rotates to drive the extrusion material to move towards the die head 32. During the movement, the extrusion material melts in the high-temperature environment of the melting part 31 and is in a molten state when it reaches the die head 32. The molten extrusion material is transferred to the conveying pipe 331 through the die head 32. The conveying pipe 331 and the extrusion die pipe 21 jointly limit the forming space of the extrusion material, and are cooled and plasticized into shape under the cooling action of the cooling structure 332, and finally removed through the second extrusion outlet 301.

[0044] In this embodiment, the conveying pipe 331 is a single-layer pipe and is sleeved on the outer peripheral side of the extrusion die pipe 21. The conveying pipe 331 and the extrusion die pipe 21 jointly form the forming space of the extrusion material. In other embodiments, the conveying pipe 331 can also be a double-layer sleeve with inner and outer nesting. The inner pipe is sleeved on the outside of the extrusion die pipe 21, and the outer pipe is sleeved on the outside of the inner pipe and jointly forms the forming space of the extrusion material with the inner pipe.

[0045] It should be noted that the cooling structure 332 can cool the extruded material in the conveying pipe 331 by means of air cooling and / or water cooling, and the specific structure of the cooling structure 332 is not limited. The high-temperature environment of the melting part 31 is provided by an electromagnetic heater, which is an existing design and will not be elaborated here. Generally, the second screw 312 is divided into a conveying section, a compression section, and a metering section along the length direction from back to front. The conveying section is mainly used for conveying the extruded material, and also takes into account the effects of preheating and compression compaction. The volume of the screw groove in the compression section gradually decreases from large to small, and the temperature should reach the plasticization degree of the material. The extruded material is compressed and plasticized in the compression section and then enters the metering section. The metering section maintains or is slightly higher than the plasticization temperature and can accurately measure and quantitatively convey it to the die head 32.

[0046] In this embodiment, the inside of the extrusion die tube 21 is a conveying channel for the conductive medium 12, and the first extrusion port 201 limits the cross-sectional area of the output of the conductive medium 12. The conveying pipe 331 is sleeved on the outer peripheral side of the extrusion die tube 21, and the pipe wall of the conveying pipe 331 and the outer surface of the extrusion die tube 21 jointly define the forming space of the extruded material. Under the push of the second screw 312, the extruded material is plasticized and extruded at the second extrusion port 301 to form a fixed conduit 11. The fixed conduit 11 is tubular, the inner surface of the fixed conduit 11 has the same diameter as the outer surface of the extrusion die tube 21, and the outer surface of the fixed conduit 11 has the same diameter as the inner pipe wall of the conveying pipe 331. The first extrusion port 201 and the second extrusion port 301 are coplanar. The extruded material is plasticized and formed and extruded at the second extrusion port 301 to form a fixed conduit 11. The conductive medium 12 is filled into the fixed conduit 11 in time when the fixed conduit 11 is formed, achieving the effect of filling the conductive medium 12 while extruding the fixed conduit 11, which improves the filling efficiency and is conducive to the uniform filling effect of the conductive medium 12 in the fixed conduit 11.

[0047] As described above, the battery cell production equipment provided by this embodiment can prepare a battery cell composed of the particulate conductive medium 12 and the fixed conduit 11. Through the cooperative setting of the filling unit 20 and the extrusion unit 30, the effect of filling the conductive medium 12 while extruding the fixed conduit 11 is achieved.

[0048] In another embodiment of the present application, please refer to Figure 3 , the die head 32 is sleeved on the outer peripheral side of the extrusion die tube 21 and has an annular first cavity 302. The first cavity 302 communicates with the conveying pipe 331 and the sleeve 311. The die head 32 is an independent part and is sleeved on the outer peripheral side of the extrusion die tube 21, and can be fixedly connected or in clearance fit. The die head 32 is internally provided with a first cavity 302, and the first cavity 302 undertakes the channel function of transferring the extruded material of the melting part 31 to the conveying pipe 331. In other embodiments, the die head 32 can also adopt other structural forms as long as it can transfer the extruded material of the melting part 31 to the conveying pipe 331.

[0049] Preferably, the outer cavity wall of the first cavity 302 is coaxially and equidiameterly arranged with the inner pipe wall of the conveying pipe 331. This arrangement can simplify the structure and is beneficial to reducing the movement resistance of the extruded material from the die head 32 to the conveying pipe 331.

[0050] In another embodiment of the present application, please refer to Figure 3 , the sleeve 311 is sleeved on the outer peripheral side of the extrusion die pipe 21. A second storage cavity is formed between the sleeve 311 and the extrusion die pipe 21, and the second screw 312 is placed in the second storage cavity. The first screw 22 and the second screw 312 are coaxially arranged and have the same rotation axis. The second storage cavity communicates with the material bin 34 to receive the extruded material falling from the material bin 34. The extruded material moves in the second storage cavity and moves towards the die head 32 through the rotation of the second screw 312.

[0051] Undoubtedly, the second screw 312 is of a hollow structure and is sleeved outside the extrusion die pipe 21. There is a gap between the second screw 312 and the extrusion die pipe 21 to avoid the frictional resistance brought by the rotation of the extrusion die pipe 21 to the second screw 312.

[0052] The extrusion die pipe 21 extends to the sleeve 311. Preferably, the extrusion die pipe 21 has a constant cross-section and linearly extends in the front-rear direction. The extrusion die pipe 21 penetrates through both ends of the sleeve 311 and extends to the second extrusion port 301 of the conveying pipe 331. Each structure (die head 32 and forming part 33) of the extrusion unit 30 is integrated outside the sleeve 311, which is beneficial to simplifying the structure and design. The diameter of the sleeve 311 can be equal to or different from the diameter of the conveying pipe 331, which is not limited herein.

[0053] In another embodiment of the present application, the ratio of the rotational angular velocity of the first screw 22 and the second screw 312 is constant. The extrusion speed ratio of the conductive medium 12 to the extruded material is the same, which is beneficial to improving the uniformity of the filling of the conductive medium 12 in the fixed conduit 11.

[0054] In another embodiment of the present application, the fixed conduit 11 has elasticity, and the conductive medium 12 is in interference fit with the fixed conduit 11, so that the fixed conduit 11 exerts an inward pressure on the conductive particles, thereby improving the compactness of each conductive particle and further improving the conductivity of the conductive medium 12.

[0055] Specifically for the battery cell production equipment provided in this embodiment, it is manifested as: the total volume V1 of the conductive medium 12 extruded from the first extrusion port 201 per unit time is not less than the internal space volume V2 enclosed by the fixed conduit 11 extruded from the second extrusion port 301. This setting enables the conductive medium 12 to be fully filled into the fixed conduit 11 and the fixed conduit 11 to be properly expanded. In other words, the fixed conduit 11 exerts an inward contracting pressure on the conductive medium 12.

[0056] The total volume V1 of the conductive medium 12 extruded from the first extrusion outlet 201 per unit time is V1 = D1 * S1, where D1 is the minimum cross-sectional area of the first extrusion outlet 201, and S1 is the moving-out distance of the conductive medium 12 per unit time at the first extrusion outlet 201.

[0057] S1 = P1 * W1 / 360, where P1 is the pitch of the first screw 22, and W1 is the angular velocity of the first screw 22.

[0058] Therefore, V1 = D1 * P1 * W1 / 360.

[0059] The internal space volume V2 enclosed by the fixed conduit 11 extruded from the second extrusion outlet 301 per unit time is V2 = (D1 + d) * S2, where D1 is the cross-sectional area of the first extrusion outlet 201, d is the cross-sectional area of the wall of the die tube 21, and S2 is the moving-out distance of the fixed conduit 11 per unit time at the second extrusion outlet 301.

[0060] Since the conveying pipe 331 and the sleeve 311 are both directly sleeved on the outer peripheral side of the extrusion die tube 21 to form a conveying channel for the extruded material, when the cross-sectional dimensions of the conveying pipe 331 and the sleeve 311 are the same (the distances between the inner walls of the conveying pipe 331 and the sleeve 311 and the outer surface of the extrusion die tube 21 are equal), the moving-out distance S2 of the fixed conduit 11 per unit time at the second extrusion outlet 301 is equal to the conveying distance S3 of the extruded material from the sleeve 311 to the head die per unit time.

[0061] S3 = P2 * W2 / 360, where P2 is the pitch of the second screw 312, and W2 is the angular velocity of the second screw 312.

[0062] Therefore, V2 = (D1 + d) * P2 * W2 / 360.

[0063] The total volume of the conductive medium 12 extruded from the first extrusion outlet 201 per unit time is not less than the internal space volume enclosed by the fixed conduit 11 extruded from the second extrusion outlet 301, that is, V1 ≥ V2.

[0064] When the wall thickness of the die tube 21 is relatively small, it can be considered that: D1 * P1 * W1 / 360 > D1 * P2 * W2 / 360, and further simplified to: P1 * W1 > P2 * W2.

[0065] In another embodiment of the present application, the filling unit 20 includes a material bin 23. The material bin 23 has a storage cavity for accommodating the conductive medium 12. The storage cavity communicates with the extrusion die tube 21, and the volume of the storage cavity can be adjusted according to the volume of the conductive medium 12 in the storage cavity. Since the graphite powder particles in the conductive medium 12 are very small, they are prone to floating in the air under normal pressure. The storage cavity of the material bin 23 can expand and contract according to the volume of the conductive medium 12, so that the graphite powder and metal balls are concentrated at the bottom of the material bin 23, and the graphite powder is forced to fill the gaps between the conductive balls, thereby reducing the porosity of the conductive medium 12 filled in the fixed conduit 11 and improving the quality of the battery cell.

[0066] In this embodiment, the material bin 23 is provided with an air extraction port 202, and an air extraction pump is provided at the air extraction port 202. After a part of the conductive medium 12 is transferred from the material bin 23 to the extrusion die tube 21, the air extraction pump discharges the air in the storage cavity, and a negative pressure is formed in the storage cavity, forcing the material bin 23 to compress and reducing the volume of the storage cavity to match the volume of the conductive medium 12 therein.

[0067] It can be understood that when a feed port is provided on the upper surface of the material bin 23, the material bin 23 is equipped with a sealing cover (not shown) corresponding to the feed port. After the operation of placing the conductive medium 12 into the material bin 23 from the feed port is completed, the sealing cover is closed with the material bin 23 to seal the feed port. At this time, the air extraction pump extracts the air in the material bin 23, causing the material bin 23 to compress.

[0068] Figure 4 In the structure shown, the material bin 23 is made of a flexible material. The material bin 23 is arranged above the extrusion die tube 21, and a discharge port communicating with the blanking port is provided at the bottom of the material bin 23. The cross-section of the material bin 23 in the height direction is in a corrugated shape extending up and down, and can expand and contract up and down.

[0069] Preferably, the air extraction port 202 is provided with a filter screen. The filter screen prevents the graphite powder from leaving the storage cavity.

[0070] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A core production device for producing cores of electric wires. The core includes a fixed conduit and a conductive medium filled in the fixed conduit. The fixed conduit is made of extruded material, and the conductive medium is granular. Characterized in that, The core production device includes: A filling unit, including an extrusion die tube and a first screw disposed inside the extrusion die tube. The extrusion die tube is for the conductive medium to be placed therein and has a first extrusion outlet for the conductive medium to move out. The first screw rotates to extrude the conductive medium located in the extrusion die tube and move it out of the extrusion die tube through the first extrusion outlet. An extrusion unit, including a melting part, a head die and a forming part. The melting part is for the extruded material to be placed therein, melts the extruded material and transports the melted extruded material to the head die. The forming part includes a conveying pipe connecting the head die and a cooling structure for cooling the extruded material located in the conveying pipe. The conveying pipe is tubular and sleeved on the outer peripheral side of the extrusion die tube, and the conveying pipe has a second extrusion outlet facing away from the head die. Wherein, the first extrusion outlet and the second extrusion outlet are arranged in the same plane. The extruded material is extruded from the second extrusion outlet to form the fixed conduit, and the conductive medium is extruded from the first extrusion outlet and filled in the fixed conduit. The melting part includes a sleeve sleeved on the outside of the extrusion die tube and a second screw disposed between the sleeve and the extrusion die tube. The second screw rotates to drive the extruded material to move towards the head die.

2. The core production device according to claim 1, Characterized in that, The head die is sleeved on the outer peripheral side of the extrusion die tube and has an annular first cavity. The first cavity communicates with the conveying pipe and the melting part.

3. The core production device according to claim 2, Characterized in that, The outer cavity wall of the first cavity and the inner pipe wall of the conveying pipe are coaxially and equidiametrically arranged.

4. The core production device according to claim 1, Characterized in that, The first screw and the second screw are coaxially arranged, and the ratio of the rotational angular velocities is constant.

5. The core production device according to claim 1, Characterized in that, The total volume of the conductive medium extruded from the first extrusion outlet per unit time is not less than the internal space volume enclosed by the fixed conduit extruded from the second extrusion outlet.

6. The core production device according to claim 1, Characterized in that, The cross-sectional dimensions of the conveying pipe and the sleeve are the same; The first screw and the second screw satisfy: P1*W1 > P2*W2, where P1 is the pitch of the first screw, W1 is the angular velocity of the first screw, P2 is the pitch of the second screw, and W2 is the angular velocity of the second screw.

7. The core production device according to any one of claims 1 to 3, Characterized in that, The filling unit includes a material box, the material box has a storage cavity for accommodating the conductive medium, the storage cavity communicates with the extrusion die tube, and the volume of the storage cavity can be adjusted according to the volume of the conductive medium located in the material box.

8. The battery cell production equipment according to claim 7, characterized in that, the material box is provided with an air extraction port, and an air extraction pump is arranged at the air extraction port.

9. The battery cell production equipment according to claim 8, characterized in that, a filter screen is arranged at the air extraction port.

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