A diaphragm bag-making device

Abstract

The present invention discloses a diaphragm bag-making device, which includes a bag-making fixed seat, a first hot pressing bag-making mechanism and a second hot pressing bag-making mechanism; the first hot pressing bag-making mechanism and the second hot pressing bag-making mechanism are oppositely arranged on the bag-making fixed seat; when the diaphragm carrying the electrode tab passes between the first hot pressing bag-making mechanism and the second hot pressing bag-making mechanism, the first hot pressing bag-making mechanism and the second hot pressing bag-making mechanism perform four-side bag-making on the diaphragm to achieve the covering and fixing of the electrode tab. The diaphragm bag-making device of the present invention has a simple structure. When the diaphragm passes between the first hot pressing bag-making mechanism and the second hot pressing bag-making mechanism, the first hot pressing bag-making mechanism and the second hot pressing bag-making mechanism perform hot pressing bag-making on the four sides of the diaphragm. The bag-making time is short, the speed is fast, and the production efficiency is effectively improved. Moreover, the position of the tab after the diaphragm is bagged is fixed and not prone to movement, avoiding the situation that the movement of the tab without bag-making of the diaphragm affects the lamination accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of battery cell production, and more particularly, to a diaphragm bag-making device. Background Art

[0002] During the production of stacked battery cells, a diaphragm is required to separate two electrode plates with opposite polarities. Currently, one method is to directly attach the diaphragm to the side of the electrode plate. However, in this method, the position of the electrode plate is likely to move, and once the electrode plate moves, it will seriously affect the stacking accuracy. Another method is to use a cylinder to drive a hot pressing block to sequentially perform hot pressing on the four sides of the diaphragm to form a bag. However, the time-consuming for single-side bag-making results in low production efficiency. Summary of the Invention

[0003] In view of the deficiencies of the prior art, the present invention discloses a diaphragm bag-making device, which includes: a bag-making fixing seat, a first hot pressing and bag-making mechanism, and a second hot pressing and bag-making mechanism; the first hot pressing and bag-making mechanism and the second hot pressing and bag-making mechanism are oppositely arranged on the bag-making fixing seat; when the diaphragm carrying the electrode plate passes between the first hot pressing and bag-making mechanism and the second hot pressing and bag-making mechanism, the first hot pressing and bag-making mechanism and the second hot pressing and bag-making mechanism perform hot pressing on two sides or four sides of the diaphragm to form a bag, so as to achieve the covering and fixing of the electrode plate.

[0004] According to an embodiment of the present invention, both the first hot pressing and bag-making mechanism and the second hot pressing and bag-making mechanism include bag-making hot pressing assemblies; the two bag-making hot pressing assemblies are oppositely arranged on the bag-making fixing seat.

[0005] According to an embodiment of the present invention, each bag-making hot pressing assembly includes a bag-making roller, a hot pressing member, and a bag-making driving member; the hot pressing member is arranged on the bag-making roller, and the output end of the bag-making driving member is connected to the bag-making roller.

[0006] According to an embodiment of the present invention, the hot pressing member includes a heating tube, a hot pressing block, and a hot pressing ring; the heating tube is arranged inside the bag-making roller; the hot pressing block is arranged on the outer side wall of the bag-making roller; the hot pressing ring is sleeved on the bag-making roller and is located on both sides of the hot pressing block.

[0007] According to an embodiment of the present invention, the surfaces of the hot pressing block and the hot pressing ring have convex portions.

[0008] According to an embodiment of the present invention, the hot pressing block performs hot pressing on two sides in the length direction of the diaphragm.

[0009] According to an embodiment of the present invention, the hot pressing ring performs hot pressing on two sides in the width direction of the diaphragm.

[0010] According to an embodiment of the present invention, the bag-making hot pressing assembly further includes heat insulation blocks; the heat insulation blocks are arranged on the bag-making roller and are located on both sides of the hot pressing ring.

[0011] According to an embodiment of the present invention, the above-mentioned bag-making hot-pressing assembly further includes an electric slip ring; the electric slip ring is arranged at one end of the bag-making roller away from the bag-making driving member.

[0012] According to an embodiment of the present invention, the above-mentioned bag-making hot-pressing assembly further includes a limiting block; the limiting block is located between two bag-making rollers.

[0013] According to an embodiment of the present invention, the above-mentioned first hot-pressing bag-making mechanism further includes a bag-making driving assembly; the bag-making driving assembly is connected to the bag-making hot-pressing assembly.

[0014] According to an embodiment of the present invention, the above-mentioned bag-making driving assembly includes a bag-making moving driving member and a bag-making moving plate; the bag-making moving driving member is arranged on the bag-making fixed seat; the bag-making moving plate is arranged at the output end of the bag-making moving driving member; the bag-making hot-pressing assembly of the first hot-pressing bag-making mechanism is arranged on the bag-making moving plate.

[0015] The beneficial effects of the present invention are as follows: The diaphragm bag-making device of the present invention has a simple structure. When the diaphragm passes between the first hot-pressing bag-making mechanism and the second hot-pressing bag-making mechanism, the first hot-pressing bag-making mechanism and the second hot-pressing bag-making mechanism realize hot-pressing bag-making on the four sides of the diaphragm. The bag-making time is short and the speed is fast, effectively improving the production efficiency. Moreover, the position of the pole piece is fixed after the diaphragm is bagged and is not prone to movement, avoiding the situation that the movement of the pole piece without bagging the diaphragm affects the lamination accuracy. Description of the Drawings

[0016] The drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The illustrative embodiments and descriptions thereof of the present application are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0017] Figure 1 It is a schematic structural diagram of the diaphragm bag-making device in the embodiment of the present invention;

[0018] Figure 2 It is another schematic structural diagram of the diaphragm bag-making device in the embodiment of the present invention;

[0019] Figure 3 It is a schematic structural diagram of the bag-making hot-pressing assembly in the embodiment of the present invention;

[0020] Figure 4 It is a sectional view of the bag-making hot-pressing assembly in the embodiment of the present invention.

[0021] Explanation of the Reference Numerals in the Drawings:

[0022] 1. Diaphragm bag-making device; 11. Bag-making fixed seat; 12. First hot-pressing bag-making mechanism; 121. Bag-making hot-pressing assembly; 1211. Bag-making roller; 1212. Hot-pressing part; 12121. Heating tube; 12122. Hot-pressing block; 12123. Hot-pressing ring; 1213. Bag-making driving part; 1214. Heat insulation block; 1215. Electric slip ring; 1216. Limit block; 122. Bag-making driving assembly; 1221. Bag-making moving driving part; 1222. Bag-making moving plate. Detailed implementation manners

[0023] The following will disclose multiple implementation manners of the present invention with diagrams. For the sake of clear description, many practical details will be described together in the following narrative. However, it should be understood that these practical details are not used to limit the present invention. That is to say, in some implementation manners of the present invention, these practical details are not necessary. In addition, for the purpose of simplifying the diagrams, some conventional structures and components will be shown in a simple schematic manner in the diagrams.

[0024] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0025] In addition, in the present invention, descriptions such as "first" and "second" are only for descriptive purposes, and do not particularly refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0026] To further understand the content, features and effects of the present invention, the following embodiments are exemplified and described in detail with the accompanying drawings as follows:

[0027] Please refer to Figure 1 and Figure 2 , Figure 1 which is a schematic structural diagram of the diaphragm bag-making device 1 in the embodiment of the present invention; Figure 2Another structural schematic diagram of the diaphragm bag-making device 1 in the embodiment of the present invention. As shown in the figure, the diaphragm bag-making device 1 of the present application includes a bag-making fixing seat 11, a first hot-pressing bag-making mechanism 12, and a second hot-pressing bag-making mechanism 13. The first hot-pressing bag-making mechanism 12 and the second hot-pressing bag-making mechanism 13 are oppositely arranged on the bag-making fixing seat 11. The gap between the first hot-pressing bag-making mechanism 12 and the second hot-pressing bag-making mechanism 13 is a diaphragm conveying channel. When the diaphragm carrying the electrode pole piece passes between the first hot-pressing bag-making mechanism 12 and the second hot-pressing bag-making mechanism 13, the first hot-pressing bag-making mechanism 12 and the second hot-pressing bag-making mechanism 13 perform bag-making on two sides or four sides of the diaphragm to realize the wrapping and fixing of the electrode pole piece.

[0028] In specific applications, the first hot-pressing bag-making mechanism 12 includes a bag-making hot-pressing assembly 121 and a bag-making driving assembly 122. The bag-making driving assembly 122 is arranged on the bag-making fixing seat 11, and the bag-making hot-pressing assembly 121 of the first hot-pressing bag-making mechanism 12 is connected to the bag-making driving assembly 122.

[0029] Furthermore, the bag-making driving assembly 122 includes a bag-making moving driving member 1221 and a bag-making moving plate 1222. The bag-making moving driving member 1221 is arranged on the bag-making fixing seat 11. Specifically, the bag-making moving driving member 1221 is a cylinder. In order to ensure sufficient driving force, in this embodiment, the number of bag-making moving driving members 1221 is two. The bag-making moving plate 1222 is connected to the output ends of the two bag-making moving driving members 1221. The bag-making moving plate 1222 is slidably arranged on the bag-making fixing seat 11 through a guide rail and slider.

[0030] Refer to Figure 3 and Figure 4 , Figure 3 which is the structural schematic diagram of the bag-making hot-pressing assembly 121 in the embodiment of the present invention; Figure 4 which is the cross-sectional view of the bag-making hot-pressing assembly 121 in the embodiment of the present invention. As shown in the figure, the bag-making hot-pressing assembly 121 includes a bag-making roller 1211, a hot-pressing member 1212, and a bag-making driving member 1213. Both ends of the bag-making roller 1211 are rotatably arranged on the bag-making moving plate 1222 through a rotating shaft. The hot-pressing member 1212 includes a heating tube 12121, a hot-pressing block 12122, and a hot-pressing ring 12123. The heating tube 12121 is arranged inside the bag-making roller 1211. The hot-pressing block 12122 is embedded in the outer side wall of the bag-making roller 1211. The hot-pressing ring 12123 is sleeved on the bag-making roller 1211, and the hot-pressing ring 12123 is located on both sides of the hot-pressing block 12122. The bag-making driving member 1213 is arranged on the bag-making moving plate 1222, and the output end of the bag-making driving member 1213 is connected to the rotating shaft of the bag-making roller 1211 through a coupling. Specifically, the bag-making driving member 1213 is a motor.

[0031] The second hot pressing and bag - making mechanism 13 can have the same structure as the first hot pressing and bag - making mechanism 12, that is, the second hot pressing and bag - making mechanism 13 includes a bag - making hot - pressing assembly 121 and a bag - making driving assembly 122. In this way, after the two bag - making driving assemblies 122 drive the two bag - making hot - pressing assemblies 121 to move towards each other and abut against the diaphragm, the two bag - making hot - pressing assemblies 121 then rotate to make bags; the second hot pressing and bag - making mechanism 13 can also have a different structure from the first hot pressing and bag - making mechanism 12, that is, the second hot pressing and bag - making mechanism 13 only includes the bag - making hot - pressing assembly 121. In this way, after the bag - making driving assembly 122 of the first hot pressing and bag - making mechanism 12 drives the bag - making hot - pressing assembly 121 to move towards the bag - making hot - pressing assembly 121 of the second hot pressing and bag - making mechanism 13 and abut against the diaphragm, the two bag - making hot - pressing assemblies 121 then rotate to make bags; in order to ensure processing accuracy, in this embodiment, the second hot pressing and bag - making mechanism 13 only includes the bag - making hot - pressing assembly 121. The two ends of the bag - making roller 1211 of the second hot pressing and bag - making mechanism 13 are rotatably arranged on the bag - making fixing seat 11 through rotating shafts. The bag - making driving member 1213 of the second hot pressing and bag - making mechanism 13 is arranged on the bag - making fixing seat 11, and the output end of the bag - making driving member 1213 of the second hot pressing and bag - making mechanism 13 is connected to the rotating shaft of the bag - making roller 1211 of the second hot pressing and bag - making mechanism 13 through a coupling.

[0032] During specific application, the diaphragm coated with the electrode pole piece passes between two bag - making rollers 1211 arranged up and down. The bag - making moving driving member 1221 generates a driving force to drive the bag - making moving plate 1222 to move towards the diaphragm. The bag - making moving plate 1222 drives the bag - making roller 1211 to move towards the diaphragm, thereby driving the hot - pressing block 12122 and the hot - pressing ring 12123 to move to abut against the diaphragm. Then, the two upper and lower bag - making driving members 1213 respectively drive the two bag - making rollers 1211 to rotate in opposite directions. The bag - making roller 1211 drives the hot - pressing block 12122 and the hot - pressing ring 12123 to rotate. During the rotation of the bag - making roller 1211, the heating tube 12121 is energized to generate heat, and the heat is transferred to the hot - pressing block 12122 and the hot - pressing ring 12123 through heat transfer. The hot - pressing blocks 12122 on the upper bag - making roller 1211 and the hot - pressing blocks 12122 on the lower bag - making roller 1211 are arranged correspondingly, and the hot - pressing rings 12123 on the upper bag - making roller 1211 and the hot - pressing rings 12123 on the lower bag - making roller 1211 are arranged correspondingly. As the bag - making roller 1211 rotates, the upper hot - pressing block 12122 and the lower hot - pressing block 12122 are engaged. The glue on the diaphragm contacts the hot - pressing block 12122 and is melted by heat, realizing heat - sealing of the two sides in the length direction of the diaphragm. At the same time, the four pairwise - opposite hot - pressing rings 12123 are also engaged, melting the glue on the diaphragm in contact with the hot - pressing rings 12123, realizing heat - sealing of the two sides in the width direction of the diaphragm.

[0033] Preferably, the surfaces of the hot pressing block 12122 and the hot pressing ring 12123 have convex portions. In this embodiment, the shape of the convex portions is rectangular serrated, and the convex portions are arranged at equal intervals. Designing the surfaces of the hot pressing block 12122 and the hot pressing ring 12123 as rectangular serrations for spot ironing the diaphragm can improve the yield rate of bag making compared with ironing with a whole side. Moreover, processing into rectangular serrations has lower processing requirements than processing into a whole side. In addition, using the spot ironing method for bag making is conducive to the gas in the diaphragm being discharged from the gaps between the ironing points during the subsequent stacking process, preventing the presence of air bubbles in the bag from affecting the battery cell.

[0034] Preferably, the bag making hot pressing assembly 121 further includes heat insulation blocks 1214. The heat insulation blocks 1214 are screwed to both ends of the bag making roller 1211 through bolts, and the heat insulation blocks 1214 are located on both sides of the hot pressing ring 12123. The heat insulation blocks 1214 prevent the heat generated by the heating tube 12121 from being transferred to other components of the hot pressing block 12122 or the hot pressing ring 12123, preventing high temperature from damaging other components.

[0035] Preferably, the bag making hot pressing assembly 121 further includes an electric slip ring 1215. The electric slip ring 1215 is arranged at one end of the bag making roller 1211 away from the bag making driving member 1213. The electric slip ring 1215 can effectively prevent the wires from being wound during the rotation of the bag making roller 1211, thus affecting the normal operation.

[0036] Preferably, the bag making hot pressing assembly 121 further includes a limiting block 1216. The limiting block 1216 is located between the two bag making rollers 1211. Specifically, the limiting block 1216 is located on the bag making fixing seat 11. When the first bag making hot pressing mechanism 12 moves towards the second bag making hot pressing mechanism 13, the limiting block 1216 limits the bag making moving plate 1222 of the first bag making hot pressing mechanism 12, thereby preventing the hot pressing blocks 12122 or the hot pressing rings 12123 of the two bag making hot pressing assemblies 121 from coming into hard contact and damaging the diaphragm.

[0037] In specific applications, the above-mentioned first bag making hot pressing mechanism 12 and the second bag making hot pressing mechanism 13 are both electrically connected to the control system of the diaphragm bag making device 1. The control system of the diaphragm bag making device 1 controls the first bag making hot pressing mechanism 12 and the second bag making hot pressing mechanism 13 to act, so as to achieve the effect of automatic control of the diaphragm bag making device 1. Of course, the control system of the diaphragm bag making device 1 can be any one of an industrial control computer, a PLC or a single-chip microcomputer, which will not be elaborated here.

[0038] In summary, in one or more embodiments of the present invention, the diaphragm bag-making device of the present invention has a simple structure. When the diaphragm passes between the first hot pressing bag-making mechanism and the second hot pressing bag-making mechanism, the first hot pressing bag-making mechanism and the second hot pressing bag-making mechanism perform hot pressing on the four sides of the diaphragm to make bags. The bag-making time is short and the speed is fast, effectively improving the production efficiency. Moreover, after the diaphragm is made into a bag, the position of the electrode sheet is fixed and not prone to movement, avoiding the situation that the movement of the electrode sheet without bag-making of the diaphragm affects the lamination accuracy.

[0039] The above description is only for the embodiments of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A diaphragm bag-making device, characterized in that, Including: A bag-making fixing seat (11), a first hot-pressing bag-making mechanism (12) and a second hot-pressing bag-making mechanism (13); the first hot-pressing bag-making mechanism (12) and the second hot-pressing bag-making mechanism (13) are oppositely arranged on the bag-making fixing seat (11); when the diaphragm carrying the electrode plate passes between the first hot-pressing bag-making mechanism (12) and the second hot-pressing bag-making mechanism (13), the first hot-pressing bag-making mechanism (12) and the second hot-pressing bag-making mechanism (13) perform hot-pressing bag-making on two sides or four sides of the diaphragm to realize the covering and fixing of the electrode plate. Both the first hot-pressing bag-making mechanism (12) and the second hot-pressing bag-making mechanism (13) include a bag-making hot-pressing assembly (121); the two bag-making hot-pressing assemblies (121) are oppositely arranged on the bag-making fixing seat (11). Each bag-making hot-pressing assembly (121) includes a bag-making roller (1211), a hot-pressing part (1212) and a bag-making driving part (1213); the hot-pressing part (1212) is arranged on the bag-making roller (1211), and the output end of the bag-making driving part (1213) is connected to the bag-making roller (1211). The hot-pressing part (1212) includes a heating tube (12121), a hot-pressing block (12122) and a hot-pressing ring (12123); the heating tube (12121) is arranged inside the bag-making roller (1211); the hot-pressing block (12122) is arranged on the outer side wall of the bag-making roller (1211); the hot-pressing ring (12123) is sleeved on the bag-making roller (1211) and is located on both sides of the hot-pressing block (12122). The surfaces of the hot-pressing block (12122) and the hot-pressing ring (12123) have convex parts, and the convex parts are in the shape of rectangular saw teeth. The first hot-pressing bag-making mechanism (12) further includes a bag-making driving assembly (122); the bag-making driving assembly (122) is connected to the bag-making hot-pressing assembly (121). The bag-making driving assembly (122) includes a bag-making moving driving part (1221) and a bag-making moving plate (1222); the bag-making moving driving part (1221) is arranged on the bag-making fixing seat (11); the bag-making moving plate (1222) is arranged at the output end of the bag-making moving driving part (1221); the bag-making moving plate (1222) is slidably arranged on the bag-making fixing seat (11), the bag-making hot-pressing assembly (121) of the first hot-pressing bag-making mechanism (12) is arranged on the bag-making moving plate (1222), and both ends of the bag-making roller (1211) are rotatably arranged on the bag-making moving plate (1222).

2. The diaphragm bag-making device according to claim 1, wherein, The hot-pressing block (12122) performs hot-pressing on two sides in the length direction of the diaphragm.

3. The diaphragm bag-making device according to claim 1, characterized in that, The hot-pressing ring (12123) performs hot-pressing on two sides in the width direction of the diaphragm.

4. The diaphragm bag-making device according to claim 1, characterized in that The bag-making hot-pressing assembly (121) further includes a heat insulation block (1214); the heat insulation block (1214) is arranged on the bag-making roller (1211) and is located on both sides of the hot-pressing ring (12123).

5. The diaphragm bag-making device according to claim 1, wherein, The bag-making hot-pressing assembly (121) further includes an electric slip ring (1215); the electric slip ring (1215) is arranged at one end of the bag-making roller (1211) away from the bag-making driving member (1213).

6. The diaphragm bag-making device according to claim 1, characterized in that, The bag-making hot-pressing assembly (121) further includes a limiting block (1216); the limiting block (1216) is located between the two bag-making rollers (1211).

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