Conducting bar insulating layer manufacturing equipment

Abstract

The invention relates to the field of conducting bar manufacturing, in particular to conducting bar insulating layer manufacturing equipment which comprises a feeding roller, a discharging roller, an extrusion mold and an insulating layer heating box. The feeding roller is used for unwinding a conducting bar, and the discharging roller is used for winding the conducting bar; the conducting bar sequentially penetrates through the extrusion mold and the insulating layer heating box, the extrusion mold is used for enabling the conducting bar to penetrate through to form an insulating layer, and the insulating layer heating box is used for heating the insulating layer of the conducting bar. The conductive bar has the effect of reducing appearance defects of the insulating layer of the conductive bar.

Description

Technical Field

[0001] The present application relates to the field of conductive bar manufacturing, and in particular to a conductive bar insulating layer manufacturing device. Background Art

[0002] The conductive bar is an electronic component used to transmit large currents, which includes a battery cell and an insulating layer, and the insulating layer is applied to the outside of the battery cell. In the existing related technology, during the production process of the conductive bar, the battery cell needs to be pulled into the extrusion mold and an insulating layer needs to be formed inside the extrusion mold.

[0003] Specifically, please refer to the invention patent with publication number CN 114474655 A, which discloses a continuous production device and production method for copper and aluminum busbar extrusion, which inserts the battery core into the extrusion die, forms an insulation layer in the battery core, and then cools and solidifies the insulation layer by air cooling and cooling tank liquid cooling, so that the insulation layer is firmly laid on the outside of the battery core. In addition, the position of the conductive bar is adjusted by setting a height adjustment mechanism, thereby ensuring the stability of the conductive bar during the extrusion process.

[0004] Regarding the above-mentioned related technologies, when the insulating layer contacts the plastic jet in the extrusion mold, due to the poor fluidity of the plastic jet, the insulating layer material is prone to uneven cooling speed, which makes the insulating layer prone to appearance defects such as lines or wrinkles. Summary of the invention

[0005] In order to reduce the occurrence of appearance defects in the insulating layer of the conductive bar, the present application provides a conductive bar insulating layer manufacturing device.

[0006] The present application provides a conductive bar insulation layer manufacturing device that adopts the following technical solution: A conductive bar insulation layer manufacturing device, comprising a feeding roller, a discharging roller, an extrusion die and an insulation layer heating box; The loading roller is used to unwind the conductive bar, and the unloading roller is used to rewind the conductive bar; The conductive bar is sequentially passed through the extrusion die and the insulating layer heating box. The extrusion die is used to form an insulating layer passed through the conductive bar. The insulating layer heating box is used to heat the insulating layer of the conductive bar.

[0007] By adopting the above technical solution, after the insulating layer enters the insulating layer heating box, the heating box heats the surface layer of the insulating layer, so that the surface layer of the insulating layer containing appearance defects is melted into liquid for a second time, and the liquid surface layer reflows and redistributes under the action of tension, so that after the insulating layer leaves the insulating layer heating box, the surface layer is smoother and has no obvious appearance defects such as lines or wrinkles.

[0008] Optionally, the conductive bar insulation layer manufacturing equipment further includes a cooling trough, the conductive bar is sequentially inserted into the insulation layer heating box and the cooling trough, and the cooling trough is used to cool down the insulation layer of the conductive bar.

[0009] By adopting the above technical solution, after the surface layer of the insulating layer is heated twice and smoothed, the surface layer is cooled and solidified through the cooling groove, which is conducive to ensuring the smoothness of the surface layer after solidification.

[0010] Optionally, a plurality of cooling grooves are provided, and the plurality of cooling grooves are distributed along the conveying direction of the conductive bar, and the temperatures of the plurality of cooling grooves decrease in the conveying direction of the conductive bar.

[0011] By adopting the above technical solution, it is beneficial to control the heat dissipation rate of the insulation layer, thereby slowing down the cooling rate of the insulation layer, thereby reducing the situation where the cooling rate of some insulation layers is too fast, resulting in uneven distribution of the cooling rate of the entire insulation layer and the generation of wrinkles.

[0012] Optionally, the material of the insulating layer of the conductive bar is PVC, the temperature of the insulating layer heating box is 170-310°C, and the temperature of the cooling tank is 30-80°C.

[0013] The adoption of the above technical solution is helpful to ensure the smoothness of the insulation layer during the secondary heating process and the smoothness after cooling and solidification.

[0014] Optionally, the conductive bar insulation layer manufacturing equipment further includes a battery cell heating box, the conductive bar is sequentially inserted into the battery cell heating box and the extrusion mold, and the battery cell heating box is used to heat the battery cells of the conductive bar.

[0015] By adopting the above technical solution, the temperature of the battery cell is raised to a temperature close to that of the extrusion die, thereby reducing the situation where the inner layer of the insulation layer that first contacts the battery cell is cooled too fast compared to the outer layer due to the low temperature of the battery cell. This is beneficial to ensure uniform cooling of the insulation layer and reduce the occurrence of wrinkles caused by uneven shrinkage.

[0016] Optionally, the conductive bar insulating layer manufacturing equipment also includes an insulation box, the conductive bar is sequentially inserted into the insulation layer heating box and the insulation box, and the temperature of the insulation box is greater than the temperature of the cooling tank and lower than the temperature of the insulation layer heating box.

[0017] By adopting the above technical solution, it is beneficial to ensure that the insulating layer after secondary heating is slowly solidified in an environment closer to the temperature of the insulating layer heating box, ensure uniform cooling of all parts of the insulating layer, and reduce the adverse effects of shrinkage stress caused by uneven cooling.

[0018] Optionally, the material of the insulating layer of the conductive bar is PVC, and the temperature of the thermal insulation box is 110-160°C.

[0019] The adoption of the above technical solution is helpful to ensure the smoothness of the insulation layer during the cooling process.

[0020] Optionally, the conductive bar insulation layer manufacturing equipment further includes a hot pressing assembly, and the conductive bar is sequentially passed through the heat preservation box and the hot pressing assembly; The hot pressing assembly includes a mounting frame, a top hot pressing roller and a bottom hot pressing roller. The mounting frame is provided with a top rotating block and a bottom rotating block. The top hot pressing roller is rotatably matched with the top rotating block, and the bottom hot pressing roller is rotatably matched with the bottom rotating block. Both the top hot pressing roller and the bottom hot pressing roller have heat generation properties. The top hot pressing roller is tightly matched with the insulating layer of the conductive row from top to bottom, and the top hot pressing roller is tightly matched with the insulating layer of the conductive row from bottom to top.

[0021] By adopting the above technical solution, after the surface of the insulating layer is partially solidified, the surface of the insulating layer is hot-pressed by the top hot-pressing roller and the bottom hot-pressing roller, which is beneficial to remove the fine lines and wrinkles remaining on the surface of the insulating layer by pressure, thereby further ensuring the smoothness of the insulating layer.

[0022] Optionally, the top rotating block is slidably fitted with the mounting frame, a top elastic member is installed between the top rotating block and the mounting frame, the bottom rotating block is slidably fitted with the mounting frame, and the sliding direction of the bottom rotating block is the same as or opposite to the sliding direction of the top rotating block, and a bottom elastic member is installed between the bottom rotating block and the mounting frame.

[0023] By adopting the above technical solution, it is helpful to ensure that the top hot pressing roller and the bottom hot pressing roller are always in contact with the insulating layer of the conductive row, thereby ensuring the removal effect of fine lines and wrinkles on the surface of the insulating layer.

[0024] Optionally, the hot pressing assembly further includes a hot pressing frame, the mounting frame is rotatably matched with the hot pressing frame, and the hot pressing frame is provided with a rotating driving member, and the rotating driving member is used to drive the hot pressing frame to rotate.

[0025] By adopting the above technical solution, as the upper material roller unwinds and the lower material roller rewinds, the thickness of the conductive bar of the upper material roller and the lower material roller will gradually change, thereby causing the angle of the conductive bar to tilt accordingly. By rotating the driving member to adjust the top hot pressing roller and the bottom hot pressing roller to follow the tilt angle of the conductive bar, it is beneficial to ensure that the top hot pressing roller and the bottom hot pressing roller both act vertically on the conductive bar, thereby ensuring the effect of removing fine lines and wrinkles on the surface of the insulating layer by hot pressing.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. After the insulation layer enters the insulation layer heating box, the heating box heats the surface layer of the insulation layer, so that the surface layer of the insulation layer with appearance defects is melted into liquid for the second time, and the liquid surface layer reflows and distributes under the action of tension, so that the surface layer of the insulation layer is smoother after leaving the insulation layer heating box, without obvious appearance defects such as lines or wrinkles; 2. It is helpful to control the heat dissipation rate of the insulation layer, thereby slowing down the cooling rate of the insulation layer, thereby reducing the uneven distribution of the cooling rate of the insulation layer as a whole and the occurrence of wrinkles due to excessive cooling of part of the insulation layer; 3. Raise the temperature of the battery core to a temperature close to that of the extrusion die, thereby reducing the situation where the inside of the insulation layer that first contacts the battery core cools faster than the outside due to the low temperature of the battery core, thereby ensuring uniform cooling of the insulation layer and reducing the appearance of wrinkles caused by uneven shrinkage; 4. After the surface of the insulating layer is partially cured, the surface of the insulating layer is hot-pressed by the top hot-pressing roller and the bottom hot-pressing roller, which is conducive to removing the fine lines and wrinkles remaining on the surface of the insulating layer by pressure, thereby further ensuring the smoothness of the insulating layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the composition of the conductive bar insulation layer manufacturing equipment of Example 1 of the present application.

[0028] Figure 2 It is a schematic diagram of the composition of the conductive bar insulation layer manufacturing equipment of Example 2 of the present application.

[0029] Figure 3 It is an overall schematic diagram of the hot pressing assembly of Example 2 of the present application.

[0030] Figure 4 This is a schematic diagram of the adjustment of the top hot pressing roller and the bottom hot pressing roller in Example 2 of the present application.

[0031] Explanation of the reference numerals: 1. Loading roller; 2. Unloading roller; 3. Leveling assembly; 31. Mounting panel; 32. Leveling roller; 4. Cell heating box; 5. Extrusion mold; 6. Insulation layer heating box; 7. Cooling trough; 8. Insulation box; 9. Hot pressing assembly; 91. Hot pressing frame; 911. Rotating drive member; 92. Mounting frame; 921. Top rotating block; 922. Bottom rotating block; 93. Top hot pressing roller; 931. Top elastic member; 94. Bottom hot pressing roller; 941. Bottom elastic member. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-4 This application is described in further detail.

[0033] Embodiment 1: The present application embodiment discloses a conductive bar insulation layer manufacturing device. Figure 1 The conductive bar insulation layer manufacturing equipment includes a feeding roller 1, a discharging roller 2, a leveling component 3, a battery cell heating box 4, an extrusion die 5, an insulation layer heating box 6 and a cooling tank 7.

[0034] The feeding roller 1 is used to unwind the cells of the conductive bar. The material of the cells can be copper or aluminum, and the cells are wound on the feeding roller 1 to form several layers. The unloading roller 2 is used to reel the conductive bar with a cured insulating layer. One end of the conductive bar is fixedly connected to the unloading roller 2, and the conductive bar is wound on the feeding roller 1 and the unloading roller 2 to form several layers. The feeding roller 1 is provided with a motor (not shown in the figure) for driving itself to rotate, and the unloading roller 2 is also provided with a motor (not shown in the figure) for driving itself to rotate, so that the cells without insulating layers and the cells with insulating layers can be pulled by the feeding roller 1 and the unloading roller 2 to move along the conveying direction.

[0035] The leveling assembly 3, the battery cell heating box 4, the extrusion die 5, the insulating layer heating box 6 and the cooling trough 7 are all located between the loading roller 1 and the unloading roller 2, and the conductive bar is sequentially passed through the leveling assembly 3, the battery cell heating box 4, the extrusion die 5, the insulating layer heating box 6 and the cooling trough 7 in the horizontal direction.

[0036] The leveling assembly 3 includes a mounting panel 31 and a plurality of leveling rollers 32, and the plurality of leveling rollers 32 are all rotatably matched with the mounting panel 31. The leveling rollers 32 are divided into two groups, and the two groups of leveling rollers 32 abut against the cells of the conductive row from the top and the bottom respectively, so as to ensure that the cells are arranged in a straight line after unwinding, so as to facilitate the subsequent forming of the insulating layer.

[0037] A cell heating chamber (not shown in the figure) is provided inside the cell heating box 4, and the cells of the conductive bar are provided in the cell heating chamber. An electric heating wire (not shown in the figure) is provided inside the cell heating chamber, so that the cells of the conductive bar can be heated by the cell heating box 4, so that the temperature of the cells rises to a temperature close to that of the extrusion die 5, and the situation that the inner layer of the insulating layer that first contacts the cells cools too fast compared to the outer layer due to the low temperature of the cells is reduced, which is conducive to ensuring uniform cooling of the insulating layer, thereby reducing the appearance of wrinkles caused by uneven shrinkage.

[0038] An extrusion chamber (not shown in the figure) is provided inside the extrusion die 5, and the cells of the conductive bar are provided in the extrusion chamber, so that an insulating layer is formed on the outside of the cells through the extrusion die 5. An extruder is connected to one side of the extrusion chamber, and the extruder is used to extrude and inject the molten plastic into the extrusion chamber. The plastic has insulating properties, and in the embodiment of the present application, the type of plastic extruded and injected by the extruder is PVC, that is, the material of the insulating layer formed on the outside of the cell is PVC.

[0039] Reference Figure 1 The insulating layer heating box 6 has an insulating layer heating chamber (not shown in the figure) extending through it, and the battery core coated with the insulating layer material is arranged in the battery core heating chamber. The battery core heating chamber is provided with an electric heating wire (not shown in the figure), and the temperature in the battery core heating chamber is 170-310°C, so as to heat the surface layer of the insulating layer, so that the surface layer melts, and then the extrusion lines and cooling wrinkles formed on the surface layer are melted, and the melted surface layer disperses itself under the action of tension, so that the surface of the surface layer is straight without obvious appearance defects.

[0040] Reference Figure 1 There are two cooling grooves 7, and the two cooling grooves 7 are distributed along the conveying direction of the conductive bar. The cooling groove 7 is provided with a cooling water groove (not shown in the figure), which is used to carry cooling water, and the battery cell with an insulating layer on the surface is passed through the cooling water groove, so that the insulating layer can be cooled and solidified through the cooling groove 7. The temperature of the cooling water in the two cooling grooves 7 is 30-80°C, and the temperature of the cooling water in the two cooling grooves 7 decreases along the conveying direction of the conductive bar, so as to cool the insulating layer according to the gradient. A circulation pipeline is provided at the bottom of the cooling groove 7 to ensure that the cooling water in the cooling water groove keeps flowing, so as to fully absorb the heat of the insulating layer and solidify it.

[0041] The implementation principle of the conductive bar insulation layer manufacturing equipment of Example 1 of the present application is as follows: the battery cell is unwound from the loading roller 1, and passes through the flattening component 3, the battery cell heating box 4 and the extrusion mold 5 in sequence, so that the outer surface of the battery cell is laid to form an insulation layer. The insulation layer formed on the surface of the battery cell then passes through the insulation layer heating box 6, and the surface layer of the insulation layer is heated by the insulation layer heating box 6, so that the appearance defects on the surface layer are melted and eliminated. After passing through the insulation layer heating box 6, the surface layer is cooled and solidified through two cooling tanks 7 with decreasing temperatures in sequence, so that the surface layer wound on the unloading roller 2 is not prone to appearance defects.

[0042] Embodiment 2: The present application embodiment discloses a conductive bar insulating layer manufacturing device, which includes all the technical features of embodiment 1 and also includes the following technical features: Reference Figure 2, a conductive bar insulation layer manufacturing device also includes an insulation box 8 and a hot pressing assembly 9. After the conductive bar is inserted into the insulation layer heating box 6, it is sequentially inserted into the insulation box 8 and the hot pressing assembly 9. An insulation chamber (not shown in the figure) is provided inside the insulation box 8, and the battery core coated with the insulation layer material is inserted into the insulation chamber. An electric heating wire (not shown in the figure) is provided inside the insulation chamber, and the temperature inside the insulation chamber is greater than the temperature of the cooling tank 7 and less than the temperature of the insulation layer heating box 6, and in the embodiment of the present application, the temperature inside the temperature chamber is 110-160°C, so that the surface layer of the insulation layer can be heat-insulated and maintained by the insulation box 8, so that the surface layer is cooled and solidified at a more suitable temperature, reducing the occurrence of wrinkles on the surface layer due to excessive cooling of the surface layer.

[0043] Reference Figure 3 The hot pressing assembly 9 includes a hot pressing frame 91, a mounting frame 92, a top hot pressing roller 93 and a bottom hot pressing roller 94. The mounting frame 92 is rotatably matched with the hot pressing frame 91. The mounting frame 92 is fixedly mounted with a rotating driving member 911. The type of the rotating driving member 911 is a motor, and the output shaft of the rotating driving member 911 is fixedly mounted on the mounting frame 92, so as to drive the mounting frame 92 to rotate through the rotating driving member 911. The mounting frame 92 is slidably matched with two top rotating blocks 921 and two bottom rotating blocks 922 through four unpowered telescopic rods, and the two top rotating blocks 921 and the two bottom rotating blocks 922 are distributed in a rectangular shape. A top elastic member 931 is fixedly installed between the top rotating block 921 and the mounting frame 92, and a bottom elastic member 941 is fixedly installed between the bottom rotating block 922 and the mounting frame 92. Both ends of the top hot-pressing roller 93 are respectively rotatably matched with each top rotating block 921, and both ends of the bottom hot-pressing roller 94 are respectively rotatably matched with each bottom rotating block 922, so that the top hot-pressing roller 93 and the bottom hot-pressing roller 94 can be tightly matched with the insulating layer through the top elastic member 931 and the bottom elastic member 941.

[0044] Both the top hot-pressing roller 93 and the bottom hot-pressing roller 94 have heat-generating properties. The top hot-pressing roller 93 is pressed tightly against the insulating layer of the conductive row from top to bottom, and the top hot-pressing roller 93 is pressed tightly against the insulating layer of the conductive row from bottom to top, thereby heat-pressing the surface layer of the insulating layer by the top hot-pressing roller 93 and the bottom hot-pressing roller 94, thereby eliminating fine lines and wrinkles remaining on the surface layer.

[0045] Reference Figure 4 When the angle of the conductive row is tilted as the feeding roller 1 is unwound, the driving member 911 is rotated to adjust the top hot pressing roller 93 and the bottom hot pressing roller 94 to follow the tilt angle of the conductive row, which is beneficial to ensure that the top hot pressing roller 93 and the bottom hot pressing roller 94 both act vertically on the conductive row, thereby ensuring the effect of hot pressing to remove fine lines and wrinkles on the surface of the insulating layer.

[0046] The implementation principle of the conductive bar insulation layer manufacturing device of Example 2 of the present application is as follows: the insulation layer is uniformly solidified in the insulation box 8 through the insulation box 8 to reduce the appearance of wrinkles in the insulation layer. After the insulation layer leaves the insulation box 8, the top hot pressing roller 93 and the bottom hot pressing roller 94 act vertically on the insulation layer to further eliminate the lines and wrinkles remaining on the surface of the insulation layer.

[0047] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A conductive bar insulation layer manufacturing device, characterized in that: It comprises a feeding roller (1), a feeding roller (2), an extrusion die (5) and an insulating layer heating box (6); The loading roller (1) is used to unwind the conductive bar, and the unloading roller (2) is used to rewind the conductive bar; The conductive bar is sequentially passed through the extrusion die (5) and the insulating layer heating box (6); the extrusion die (5) is used to form an insulating layer passed through the conductive bar; and the insulating layer heating box (6) is used to heat the insulating layer of the conductive bar.

2. The conductive bar insulation layer manufacturing equipment according to claim 1, characterized in that: The conductive bar insulation layer manufacturing equipment further comprises a cooling trough (7), the conductive bar is sequentially arranged through the insulation layer heating box (6) and the cooling trough (7), and the cooling trough (7) is used to cool the insulation layer of the conductive bar.

3. The conductive bar insulation layer manufacturing equipment according to claim 2, characterized in that: A plurality of cooling grooves (7) are provided, and the plurality of cooling grooves (7) are distributed along the conveying direction of the conductive row, and the temperatures of the plurality of cooling grooves (7) decrease in the conveying direction of the conductive row.

4. A conductive bar insulating layer manufacturing device according to claim 2 or 3, characterized in that: The material of the insulating layer of the conductive bar is PVC, the temperature of the insulating layer heating box (6) is 170-310°C, and the temperature of the cooling tank (7) is 30-80°C.

5. The conductive bar insulating layer manufacturing equipment according to claim 1 or 2, characterized in that: The conductive bar insulation layer manufacturing equipment further comprises a battery cell heating box (4), the conductive bar is sequentially inserted into the battery cell heating box (4) and the extrusion die (5), and the battery cell heating box (4) is used to heat the battery cells of the conductive bar.

6. The conductive bar insulation layer manufacturing equipment according to claim 2, characterized in that: The conductive bar insulating layer manufacturing equipment also includes an insulation box (8), the conductive bar is sequentially inserted into the insulation layer heating box (6) and the insulation box (8), and the temperature of the insulation box (8) is greater than the temperature of the cooling tank (7) and less than the temperature of the insulation layer heating box (6).

7. The conductive bar insulating layer manufacturing equipment according to claim 6, characterized in that: The material of the insulating layer of the conductive bar is PVC, and the temperature of the heat preservation box (8) is 110-160°C.

8. The conductive bar insulating layer manufacturing equipment according to claim 6, characterized in that: The conductive bar insulation layer manufacturing equipment further comprises a hot pressing assembly (9), and the conductive bar is sequentially inserted into the heat preservation box (8) and the hot pressing assembly (9); The hot pressing assembly (9) comprises a mounting frame (92), a top hot pressing roller (93) and a bottom hot pressing roller (94); the mounting frame (92) is provided with a top rotating block (921) and a bottom rotating block (922); the top hot pressing roller (93) is rotationally matched with the top rotating block (921); the bottom hot pressing roller (94) is rotationally matched with the bottom rotating block (922); both the top hot pressing roller (93) and the bottom hot pressing roller (94) have heat generation properties; the top hot pressing roller (93) is tightly matched with the insulating layer of the conductive row from top to bottom; and the top hot pressing roller (93) is tightly matched with the insulating layer of the conductive row from bottom to top.

9. The conductive bar insulating layer manufacturing equipment according to claim 8, characterized in that: The top rotating block (921) is slidably matched with the mounting frame (92), a top elastic member (931) is installed between the top rotating block (921) and the mounting frame (92), the bottom rotating block (922) is slidably matched with the mounting frame (92), and the sliding direction of the bottom rotating block (922) is the same as or opposite to the sliding direction of the top rotating block (921), and a bottom elastic member (941) is installed between the bottom rotating block (922) and the mounting frame (92).

10. The conductive bar insulation layer manufacturing equipment according to claim 8, characterized in that: The hot pressing assembly (9) further comprises a hot pressing frame (91), the mounting frame (92) rotatably cooperates with the hot pressing frame (91), and the hot pressing frame (91) is provided with a rotating driving member (911), and the rotating driving member (911) is used to drive the hot pressing frame (91) to rotate.

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