Battery winding machine and battery production line

Abstract

The utility model provides a battery winding machine and a battery production line. The battery winding machine comprises a winding mechanism, a conveying line, an ultrasonic heating device and a press-fit heating device, the input end of the conveying line is adjacent to the output end of the winding mechanism, the conveying line is used for conveying a roll core, the ultrasonic heating device forms an ultrasonic heating channel, the conveying line penetrates through the ultrasonic heating channel, and the press-fit heating device is used for pressing the roll core. The press-fit heating device forms a press-fit heating channel, the conveying line further penetrates through the press-fit heating channel, and the ultrasonic heating device and the press-fit heating device are sequentially arranged in the conveying direction of the conveying line. As the roll core is heated and softened by the ultrasonic heating device before being pressed, the pressing time of the pressing heating device can be shortened, the forming efficiency of the roll core is improved, the problems that the surface of the roll core is damaged by the pressing heating device and the diaphragm and the pole piece are crumpled are solved, and the qualification rate of the roll core is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of battery manufacturing, and in particular to a battery winding machine and a battery production line. Background Art

[0002] The battery winding machine is one of the key equipment in the battery production process. It is mainly used to roll the positive electrode sheets, negative electrode sheets and separators with matching sizes after slitting into cores. It is an important process link in battery cell manufacturing.

[0003] In the related technology, the positive electrode sheet, negative electrode sheet and diaphragm are fixed vertically on the fixed plate by the material shaft. Under the action of the deviation corrector, the electrode sheet and the diaphragm are wound into a cylindrical core by the winding needle, and then the core is unloaded onto the transmission logistics line. The transmission logistics line transports the core to the pressing station. The pressing fixture presses and heats the core. The core is initially formed into a square. Finally, the transmission logistics line outputs the core to the outside.

[0004] However, in the process of pressing and heating the core, the core is heated by heat conduction, which takes a certain amount of time, resulting in a slow heating speed. Therefore, a longer pressing time is required to ensure the pressing effect, resulting in a low forming efficiency of the core. In addition, due to the high hardness of the core before pressing, the pressing fixture is more likely to damage the surface of the core and more likely to wrinkle the diaphragm and the pole piece, resulting in a poor pass rate of the core.

[0005] Therefore, there is an urgent need to improve the core forming efficiency and the core qualification rate. Utility Model Content

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a battery winding machine and a battery production line that improve the core forming efficiency and the core qualification rate.

[0007] The purpose of this disclosure is achieved through the following technical solutions:

[0008] A battery winding machine, comprising a winding mechanism, the battery winding machine further comprising:

[0009] A conveying line, wherein an input end of the conveying line is arranged adjacent to an output end of the winding mechanism, and the conveying line is used to convey the winding core;

[0010] An ultrasonic heating device forms an ultrasonic heating channel, and the conveying line is arranged through the ultrasonic heating channel; and

[0011] The pressing and heating device forms a pressing and heating channel, the conveying line is also arranged in the pressing and heating channel, and the ultrasonic heating device and the pressing and heating device are arranged in sequence along the conveying direction of the conveying line.

[0012] In some embodiments, the pressing and heating device comprises:

[0013] A downward pressing driving member is arranged on the upper side of the conveying line; and

[0014] A downward pressing heating plate connected to the power output end of the downward pressing driving member, the downward pressing heating plate being located on the upper side of the conveying line;

[0015] The carrying plate, the lower pressing heating plate and the carrying plate are symmetrically arranged on the upper and lower sides of the conveyor belt of the conveyor line, and the pressing heating channel is formed between the lower pressing heating plate and the carrying plate.

[0016] In some embodiments, the lower pressing heating plate includes a lower pressing plate body and a heating body, the lower pressing plate body is connected to the power output end of the lower pressing driving member, the lower pressing plate body and the supporting plate are symmetrically arranged on the upper and lower sides of the conveyor belt of the conveyor line, the pressing heating channel is formed between the lower pressing plate body and the supporting plate, and the heating body is embedded in the lower pressing plate body.

[0017] In some embodiments, the lower pressing plate body is provided with a pressing surface, the pressing surface is used to contact the winding core, the number of the heating bodies is multiple, and the heating bodies are arranged at intervals along the extension direction of the pressing surface.

[0018] In some embodiments, the winding mechanism comprises:

[0019] Fixed plate;

[0020] A first pole piece unwinding assembly, rotatably connected to the fixing plate;

[0021] A first diaphragm unwinding assembly, rotatably connected to the fixed plate;

[0022] A second pole piece unwinding assembly, rotatably connected to the fixing plate;

[0023] A second diaphragm unwinding assembly, rotatably connected to the fixed plate; and

[0024] A winding assembly, rotatably connected to the fixed plate;

[0025] Among them, the first pole piece unwinding assembly, the first diaphragm unwinding assembly, the second pole piece unwinding assembly and the second diaphragm unwinding assembly are arranged in sequence along the circumference of the winding assembly, and the winding assembly is arranged adjacent to the input end of the conveyor line.

[0026] In some embodiments, the winding assembly includes a winding drive and a winding needle. The winding drive is installed on one side of the fixed plate, and the winding needle is connected to a power output end of the winding drive.

[0027] In some embodiments, the cross-section of the winding needle is circular.

[0028] In some embodiments, the winding mechanism also includes a first correcting assembly, which is installed on the fixed plate, and the first correcting assembly is located between the first pole piece unwinding assembly and the winding assembly, and the first correcting assembly is also located between the first diaphragm unwinding assembly and the winding assembly.

[0029] In some embodiments, the winding mechanism also includes a second correcting assembly, which is installed on the fixed plate, and the second correcting assembly is located between the second pole piece unwinding assembly and the winding assembly, and the second correcting assembly is also located between the second diaphragm unwinding assembly and the winding assembly.

[0030] A battery production line comprises the battery winding machine described in any one of the above embodiments.

[0031] Compared with the prior art, the present invention has at least the following advantages:

[0032] 1. The ultrasonic heating device heats the core before pressing. Ultrasonic heating uses the energy generated by high-frequency vibration ultrasound when it propagates in the material, and converts it into thermal energy by interacting with the material. This heating method directly acts on the inside of the material, reducing the loss of energy during the transmission process, making the heating and softening efficiency of the core higher.

[0033] 2. After the ultrasonic heating device heats and softens the core, the conveyor line conveys the core to the pressing and heating channel, so that the pressing and heating device presses and heats the core. Since the core has been heated and softened by the ultrasonic heating device before pressing, the pressing time of the pressing and heating device can be shortened, thereby improving the forming efficiency of the core.

[0034] 3. Since the core has been heated and softened by the ultrasonic heating device before pressing, the problem of the pressing heating device damaging the core surface and wrinkling the diaphragm and electrode is suppressed, thereby improving the qualified rate of the core.

[0035] 4. Since the core has been softened by the ultrasonic heating device before pressing, the maximum pressing force of the pressing heating device is larger while avoiding damage to the battery by the pressing heating device. The core is pressed with the maximum pressing force of the pressing heating device, so that the elastic recovery of the core after pressing is smaller. Therefore, the assembly line processes such as preheating and hot pressing after winding can be omitted, simplifying the assembly line processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 A schematic structural diagram of a battery winding machine according to an embodiment;

[0038] Figure 2 for Figure 1 An enlarged schematic diagram of a battery winding machine at position A is shown;

[0039] Figure 3 for Figure 1 The battery winding machine shown is a schematic structural diagram from another perspective.

[0040] Reference numerals: 10, battery winding machine; 100, winding mechanism; 110, fixing plate; 120, first pole piece unwinding assembly; 130, first diaphragm unwinding assembly; 140, second pole piece unwinding assembly; 150, second diaphragm unwinding assembly; 160, winding assembly; 161, winding drive member; 162, winding needle; 170, first deviation correction assembly; 180, second deviation correction assembly;

[0041] 200. Conveyor line;

[0042] 300, ultrasonic heating device; 301, ultrasonic heating channel;

[0043] 400, pressing and heating device; 401, pressing and heating channel; 410, pressing driving member; 420, pressing and heating plate; 421, pressing plate body; 430, carrying plate. DETAILED DESCRIPTION

[0044] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0045] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0047] In order to better understand the technical solutions and beneficial effects of the present invention, the present invention is further described in detail below in conjunction with specific embodiments:

[0048] like Figure 1 and Figure 2 As shown, a battery winding machine 10 of an embodiment includes a winding mechanism 100, a conveyor line 200, an ultrasonic heating device 300 and a pressing and heating device 400. Among them, the input end of the conveyor line 200 is arranged adjacent to the output end of the winding mechanism 100, and the core formed by winding by the winding mechanism 100 is fed to the input end of the conveyor line 200, and the conveyor line 200 is used to convey the core. The ultrasonic heating device 300 forms an ultrasonic heating channel 301, and the conveyor line 200 is arranged in the ultrasonic heating channel 301, so that the conveyor line 200 can convey the core to the ultrasonic heating channel 301. When the core is in the ultrasonic heating channel 301, the ultrasonic heating device 300 heats the core. The pressing and heating device 400 forms a pressing and heating channel 401, and the conveyor line 200 is also arranged in the pressing and heating channel 401, so that the conveyor line 200 can convey the core to the pressing and heating channel 401, and the ultrasonic heating device 300 and the pressing and heating device 400 are arranged in sequence along the conveying direction of the conveyor line 200.

[0049] like Figure 1 and Figure 2 As shown, in this embodiment, the winding mechanism 100 winds to form a core, and the core is unloaded to the input end of the conveyor line 200. The conveyor line 200 conveys the core to the ultrasonic heating channel and stops for a certain period of time, so that the ultrasonic heating device 300 heats and softens the core. After the heating and softening are completed, the conveyor line 200 conveys the heated and softened core to the pressing and heating device 400 and stops for a certain period of time. At this time, the pressing and heating device 400 presses and heats the core in the up and down directions, so that the core changes from a round shape to a square shape. After the pressing and heating are completed, the conveyor line 200 conveys the square core to the outside. It can be understood that after the winding mechanism 100 completes the winding, the core can be unloaded to the input end of the conveyor line 200 manually or by a unloading device.

[0050] In the above-mentioned battery winding machine 10, the ultrasonic heating device 300 heats the core before pressing. Ultrasonic heating uses the energy generated by high-frequency vibrating ultrasound when it propagates in a material, and converts it into thermal energy by interacting with the material. This heating method directly acts on the inside of the material, reducing the loss of energy during the transmission process, making the heating and softening efficiency of the core higher.

[0051] Furthermore, after the ultrasonic heating device 300 heats and softens the core, the conveyor line 200 conveys the core to the pressing and heating channel 401, so that the pressing and heating device 400 presses and heats the core. Since the core has been heated and softened by the ultrasonic heating device 300 before pressing, the pressing time of the pressing and heating device 400 can be shortened, thereby improving the forming efficiency of the core. At the same time, the problem of the pressing and heating device 400 damaging the surface of the core and wrinkling the diaphragm and the electrode piece is suppressed, thereby improving the qualified rate of the core. Simultaneously, under the premise of avoiding the pressing and heating device 400 from damaging the battery, the maximum pressing force of the pressing and heating device 400 is made larger, and the core is pressed by the maximum pressing force of the pressing and heating device 400, so that the elastic recovery of the core after pressing is smaller, thereby omitting the assembly line processes such as preheating and hot pressing after winding, thereby simplifying the assembly line processes.

[0052] like Figure 2 As shown, in some embodiments, the pressing and heating device 400 includes a pressing driving member 410, a pressing and heating plate 420 and a carrying plate 430. The pressing driving member 410 is arranged on the upper side of the conveyor line 200, the pressing and heating plate 420 is connected to the power output end of the pressing driving member 410, the pressing and heating plate 420 and the carrying plate 430 are symmetrically arranged on the upper and lower sides of the conveyor belt of the conveyor line 200, and a pressing and heating channel 401 is formed between the pressing and heating plate 420 and the carrying plate 430. In this embodiment, the pressing driving member 410 drives the pressing and heating plate 420 to press downward, so that the pressing and heating plate 420 and the carrying plate 430 press the core together, and at the same time, the pressing and heating plate 420 heats the core, so that the pressing and heating device 400 presses and heats the core.

[0053] like Figure 2 As shown, in some embodiments, the lower pressing heating plate 420 includes a lower pressing plate body 421 and a heating body. The lower pressing plate body 421 is connected to the power output end of the lower pressing driving member 410. The lower pressing plate body 421 and the supporting plate 430 are symmetrically arranged on the upper and lower sides of the conveyor belt of the conveyor line 200. A pressing heating channel 401 is formed between the lower pressing plate body 421 and the supporting plate 430. The heating body is embedded in the lower pressing plate body 421. The heating body generates heat after being energized, and the heat of the heating body is conducted to the lower pressing plate body 421, so that the lower pressing plate body 421 can heat the winding core.

[0054] like Figure 2As shown, in some embodiments, the lower pressure plate body 421 is provided with a pressing surface, which is used to contact the winding core. There are multiple heating bodies, and the heating bodies are arranged at intervals along the extension direction of the pressing surface, so that the heat of the lower pressure plate body 421 is distributed more evenly, and the heating of the winding core is more evenly distributed, so as to improve the pressing effect.

[0055] like Figure 1 As shown, in some embodiments, the winding mechanism 100 includes a fixed plate 110, a first pole sheet unwinding assembly 120, a first diaphragm unwinding assembly 130, a second pole sheet unwinding assembly 140, a second diaphragm unwinding assembly 150 and a winding assembly 160, the first pole sheet unwinding assembly 120 is rotatably connected to the fixed plate 110, the first pole sheet unwinding assembly 120 is used to unwind the negative pole sheet, the first diaphragm unwinding assembly 130 is rotatably connected to the fixed plate 110, the first diaphragm unwinding assembly 130 is used to unwind the first diaphragm, the second pole sheet unwinding assembly 140 is rotatably connected to the fixed plate 110, the second pole sheet unwinding assembly 140 is used to unwind the positive pole sheet, the second diaphragm unwinding assembly 150 is rotatably connected to the fixed plate 110, the second diaphragm unwinding assembly 150 is used to unwind the second diaphragm, the winding assembly 160 is rotatably connected to the fixed plate 110, and the winding assembly 160 is used to wind the first diaphragm, the negative pole sheet, the second diaphragm and the positive pole sheet that are stacked. Among them, the first electrode sheet unwinding assembly 120, the first diaphragm unwinding assembly 130, the second electrode sheet unwinding assembly 140 and the second diaphragm unwinding assembly 150 are arranged in sequence along the circumference of the winding assembly 160, and the winding assembly 160 is arranged adjacent to the input end of the conveyor line 200, so that the winding assembly 160 is used to wind the stacked first diaphragm, negative electrode sheet, second diaphragm and positive electrode sheet to form a winding core.

[0056] like Figure 2 and Figure 3 As shown, in some embodiments, the winding assembly 160 includes a winding drive 161 and a winding needle 162. The winding drive 161 is installed on one side of the fixed plate 110, and the winding needle 162 is connected to the power output end of the winding drive 161. The winding drive 161 is used to drive the winding needle 162 to rotate, so that the winding needle 162 is used to wind the stacked first diaphragm, the negative electrode sheet, the second diaphragm and the positive electrode sheet to form a winding core.

[0057] like Figure 2 As shown, in some embodiments, the cross-section of the winding needle 162 is circular, so that the winding needle 162 is wound to form a circular winding core.

[0058] like Figure 1As shown, in some embodiments, the winding mechanism 100 further includes a first deviation correction component 170, which is mounted on the fixing plate 110, and is located between the first electrode sheet unwinding component 120 and the winding component 160, and the first deviation correction component 170 is also located between the first diaphragm unwinding component 130 and the winding component 160. In this embodiment, during the winding process, the first deviation correction component 170 corrects the negative electrode sheet and the first diaphragm to the correct position, ensuring that the negative electrode sheet and the first diaphragm remain stable during the winding process.

[0059] like Figure 1 As shown, in some embodiments, the winding mechanism 100 further includes a second deviation correction component 180, which is mounted on the fixing plate 110, and is located between the second electrode sheet unwinding component 140 and the winding component 160, and the second deviation correction component 180 is also located between the second diaphragm unwinding component 150 and the winding component 160. In this embodiment, during the winding process, the second deviation correction component 180 corrects the positive electrode sheet and the second diaphragm to the correct position, ensuring that the positive electrode sheet and the second diaphragm remain stable during the winding process.

[0060] The present disclosure also provides a battery production line, comprising the battery winding machine 10 described in any one of the above embodiments.

[0061] Compared with the prior art, the present invention has at least the following advantages:

[0062] 1. The ultrasonic heating device 300 heats the core before pressing. Ultrasonic heating uses the energy generated by high-frequency vibrating ultrasound when it propagates in a material, and converts it into thermal energy by interacting with the material. This heating method directly acts on the inside of the material, reducing energy loss during the transmission process, making the heating and softening efficiency of the core higher.

[0063] 2. After the ultrasonic heating device 300 heats and softens the core, the conveyor line 200 conveys the core to the pressing and heating channel 401, so that the pressing and heating device 400 presses and heats the core. Since the core has been heated and softened by the ultrasonic heating device 300 before pressing, the pressing time of the pressing and heating device 400 can be shortened, thereby improving the forming efficiency of the core.

[0064] 3. Since the core has been heated and softened by the ultrasonic heating device 300 before lamination, the problem of the lamination heating device 400 damaging the surface of the core and wrinkling the diaphragm and the electrode is suppressed, thereby improving the qualified rate of the core.

[0065] 4. Since the winding core has been heated and softened by the ultrasonic heating device 300 before pressing, the maximum pressing force of the pressing heating device 400 is larger while avoiding damage to the battery by the pressing heating device 400. The winding core is pressed with the maximum pressing force of the pressing heating device 400, so that the elastic recovery of the winding core after pressing is smaller, and thus the assembly line processes such as preheating and hot pressing after winding can be omitted, simplifying the assembly line processes.

[0066] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the disclosed patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the disclosed patent shall be subject to the attached claims.

Claims

1. A battery winding machine, comprising a winding mechanism (100), characterized in that: The battery winding machine also includes: A conveying line (200), wherein an input end of the conveying line (200) is arranged adjacent to an output end of the winding mechanism (100), and the conveying line (200) is used to convey a winding core; An ultrasonic heating device (300) forms an ultrasonic heating channel (301), and the conveying line (200) is arranged through the ultrasonic heating channel (301); and The pressing and heating device (400) forms a pressing and heating channel (401), the conveying line (200) is also arranged in the pressing and heating channel (401), and the ultrasonic heating device (300) and the pressing and heating device (400) are arranged in sequence along the conveying direction of the conveying line (200).

2. The battery winding machine according to claim 1, characterized in that: The pressing and heating device (400) comprises: A downward driving member (410) is disposed on the upper side of the conveying line (200); and A downward pressing heating plate (420) connected to the power output end of the downward pressing driving member (410), the downward pressing heating plate (420) being located on the upper side of the conveying line (200); The support plate (430), the lower pressing heating plate (420) and the support plate (430) are symmetrically arranged on the upper and lower sides of the conveyor belt of the conveyor line (200), and the pressing heating channel (401) is formed between the lower pressing heating plate (420) and the support plate (430).

3. The battery winding machine according to claim 2, characterized in that: The lower pressing heating plate (420) includes a lower pressing plate body (421) and a heating body. The lower pressing plate body (421) is connected to the power output end of the lower pressing driving member (410). The lower pressing plate body (421) and the supporting plate (430) are symmetrically arranged on the upper and lower sides of the conveyor belt of the conveyor line (200). The pressing heating channel (401) is formed between the lower pressing plate body (421) and the supporting plate (430), and the heating body is embedded in the lower pressing plate body (421).

4. The battery winding machine according to claim 3, characterized in that: The lower pressing plate body (421) is provided with a pressing surface, and the pressing surface is used to contact the winding core. The number of the heating bodies is multiple, and the heating bodies are arranged at intervals along the extension direction of the pressing surface.

5. The battery winding machine according to claim 1, characterized in that: The winding mechanism (100) comprises: A fixing plate (110); A first pole piece unwinding assembly (120) rotatably connected to the fixing plate (110); A first diaphragm unwinding assembly (130) rotatably connected to the fixing plate (110); A second pole piece unwinding assembly (140) rotatably connected to the fixing plate (110); A second diaphragm unwinding assembly (150) is rotatably connected to the fixed plate (110); and A winding assembly (160) rotatably connected to the fixing plate (110); The first pole piece unwinding assembly (120), the first diaphragm unwinding assembly (130), the second pole piece unwinding assembly (140) and the second diaphragm unwinding assembly (150) are sequentially arranged along the circumference of the winding assembly (160), and the winding assembly (160) is arranged adjacent to the input end of the conveying line (200).

6. The battery winding machine according to claim 5, characterized in that: The winding assembly (160) comprises a winding drive member (161) and a winding needle (162); the winding drive member (161) is mounted on one side of the fixed plate (110); and the winding needle (162) is connected to a power output end of the winding drive member (161).

7. The battery winding machine according to claim 6, characterized in that: The cross section of the winding needle (162) is circular.

8. The battery winding machine according to claim 5, characterized in that: The winding mechanism (100) further comprises a first deviation-correcting assembly (170), wherein the first deviation-correcting assembly (170) is mounted on the fixed plate (110), the first deviation-correcting assembly (170) is located between the first pole piece unwinding assembly (120) and the winding assembly (160), and the first deviation-correcting assembly (170) is also located between the first diaphragm unwinding assembly (130) and the winding assembly (160).

9. The battery winding machine according to claim 5, characterized in that: The winding mechanism (100) further comprises a second deviation-correcting assembly (180), wherein the second deviation-correcting assembly (180) is mounted on the fixed plate (110), the second deviation-correcting assembly (180) is located between the second pole piece unwinding assembly (140) and the winding assembly (160), and the second deviation-correcting assembly (180) is also located between the second diaphragm unwinding assembly (150) and the winding assembly (160).

10. A battery production line, characterized in that: A battery winding machine comprising the battery winding machine according to any one of claims 1 to 9.

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