Film pulling mechanism, film wrapping device and battery film wrapping process

Abstract

The application discloses a film pulling mechanism, a film coating equipment and a battery film coating process, and relates to the technical field of battery film coating. The film pulling mechanism comprises a film pulling assembly and an advanced film pressing assembly. The film pulling assembly is used for performing a film pulling action. The advanced film pressing assembly comprises a film pressing rod and a pressure receiving base. The film pressing rod is connected with a fourth driving source and is driven to move by the fourth driving source. The pressure receiving base is fixedly arranged on the opposite surface of the film pressing rod. The film pressing rod and the pressure receiving base have a film passing channel for the film to pass through. The film pressing rod is driven to move towards the pressure receiving base by the fourth driving source, so as to press the pressure receiving base when the film pulling assembly is not returned, thereby enabling the film to be immediately cut after the battery is coated with the film. The film pressing rod is driven to move away from the pressure receiving base by the fourth driving source, so that the film can move in the film passing channel when the film pulling assembly performs the film pulling action. The film can be cut at the same time when the pushing mechanism is withdrawn from the film coating mechanism, and the efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of battery packing technology, and particularly to a film stretching mechanism, a packing device, and a battery packing process. Background Technology

[0002] In the later stages of lithium-ion battery manufacturing, the outer surface of the battery needs to be coated with a blue film. The main function of the blue film is to protect the battery from external scratches or electrolyte corrosion. In developing this invention, the inventors discovered at least the following problems in the existing technology: Currently, when coating the battery with the blue film, a film-pulling mechanism pulls the film from a film-laying component, a pushing mechanism pushes the battery to the position of the blue film pulled out by the film-pulling mechanism, and then continues to push the battery towards the coating mechanism, finally coating the battery surface with the blue film.

[0003] In this process, after the battery is coated, the blue film at the bottom large end of the battery is lifted by the film-pulling rod and naturally detaches. However, the blue film at the top large end of the battery needs to be cut before the coated battery is pushed out and the next battery is coated. If the blue film at the top large end of the battery is cut after the coating process, the blue film will shift in position due to swinging or rolling. This will prevent the film-pulling rod from effectively adhering to the blue film after it is lifted to its initial point, thus preventing the next film-pulling action from being completed. Therefore, when the blue film needs to be cut, the film pulling rod must first be returned to the initial point to receive the new blue film segment before cutting can be performed. However, when the pulling rod is raised to the initial point, the pushing mechanism must first be disengaged from the wrapping mechanism; otherwise, the pulling rod will interfere with the pushing mechanism. Thus, the pushing mechanism must first be disengaged from the wrapping mechanism, and then the film pulling rod must be raised to the initial point before the blue film can be cut. These steps must be performed sequentially, which makes the wrapping efficiency inefficient. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the aforementioned technical problems in the prior art. To this end, embodiments of the present invention provide a film-pulling mechanism that can simultaneously cut the blue film during the process of the pushing mechanism retracting from the wrapping mechanism, without waiting for the film-pulling assembly to return, thereby improving efficiency.

[0005] This invention also provides a coating device.

[0006] This invention also provides a battery packing process.

[0007] According to an embodiment of a first aspect of the present invention, a film-pulling mechanism is provided, comprising a film-pulling assembly and a pre-pressing assembly. The film-pulling assembly is used to perform a film-pulling action, and the pre-pressing assembly includes a pressing rod and a pressure-bearing base. The pressing rod is connected to and driven by a fourth drive source, and the pressure-bearing base is fixedly disposed on the opposite side of the pressing rod. A transmissive channel for a blue film to pass through is provided between the pressing rod and the pressure-bearing base. The pressing rod is driven by the fourth drive source to move towards the pressure-bearing base to press the pressure-bearing base firmly when the film-pulling assembly has not returned, thereby allowing the blue film at the rear section of the pre-pressing assembly to be immediately cut after the battery is encapsulated. The pressing rod is driven away from the pressure-bearing base by the fourth drive source so that the blue film can move in the transmissive channel when the film-pulling assembly performs the film-pulling action.

[0008] The aforementioned film-pulling mechanism offers at least the following advantages: After the coating process is completed, the pushing mechanism withdraws from the coating mechanism. At this time, the film-pulling assembly has not returned. Driven by the fourth drive source, the pressure rod moves towards the pressure-bearing base, pressing the blue film firmly onto the pressure-bearing base. Simultaneously, the blue film can be immediately cut, and the pushing mechanism can withdraw from the battery output channel during the cutting process. Then, the film-pulling assembly can directly lift and re-adhere the blue film. The pressure rod moves away from the pressure-bearing base, and the film-pulling assembly pulls the blue film to the coating position for re-coating the battery. This application allows for simultaneous cutting of the blue film during the withdrawal of the pushing mechanism from the coating mechanism, eliminating the need to wait for the film-pulling assembly to return. The withdrawal of the pushing mechanism and the cutting of the blue film can be performed concurrently, thus improving coating efficiency.

[0009] According to an embodiment of the first aspect of the present invention, the pressure-bearing base has a pressure-bearing end face facing the direction of the pressure rod.

[0010] According to an embodiment of the first aspect of the present invention, the pressure rod has an arcuate surface toward the pressure-bearing base.

[0011] According to an embodiment of the first aspect of the present invention, the film stretching mechanism further includes a second frame, the second frame being provided with a sliding frame, the sliding frame being directly or indirectly connected to the second frame via a fourth slide rail, the driving end of the fourth drive source being connected to the sliding frame to drive the sliding frame to move along the fourth slide rail, thereby causing the sliding frame to move closer to or away from the pressure-bearing base, and the film pressing rod being mounted on the sliding frame.

[0012] According to an embodiment of the first aspect of the present invention, the film stretching mechanism further includes a second frame, the second frame including a first upright plate and a second upright plate, the first upright plate and the second upright plate being spaced apart along the width direction of the second frame, the film pressing rod extending from one side of the first upright plate to one side of the second upright plate, the sliding frame including a film pressing crossbar and two connecting rods extending upward from both ends of the film pressing crossbar, the film pressing rod being installed on the side of the film pressing crossbar facing the pressure-bearing base, and the tops of the two connecting rods being slidably connected to the inner side of the first upright plate and the inner side of the second upright plate respectively through the fourth slide rail.

[0013] According to an embodiment of the first aspect of the present invention, the film-pulling assembly includes a film-pulling rod and a third driving source for driving the film-pulling rod to move up and down. The third driving source is connected to the film-pulling rod through a transmission member. The film-pulling rod is driven to rise by the third driving source and reaches below the film-pressing rod to perform film adhesion.

[0014] According to a second aspect of the present invention, a coating apparatus is provided, comprising a film-pulling mechanism as described in the first aspect of the present invention, the film-pulling mechanism having a battery input channel; a pushing mechanism for pushing a battery into the battery input channel; and a coating mechanism, the coating mechanism including a third frame, the third frame having an upper pressure roller and a lower pressure roller on a side near the film-pulling mechanism, a battery output channel forming between the upper pressure roller and the lower pressure roller, the battery output channel being connected to the battery input channel to receive the battery transmitted by the battery input channel and perform coating, and an operating space for the film-pulling assembly to perform film pulling between the battery output channel and the battery input channel.

[0015] The above-mentioned coating equipment has at least the following beneficial effects: In the coating equipment with the above-mentioned film pulling mechanism, the pushing mechanism pushes the battery into the battery input channel and the battery output channel, the film pulling assembly pulls the film between the battery input channel and the battery output channel, and covers the battery with blue film. Then, the film is wrapped in the battery output channel through the upper pressure roller and the lower pressure roller. After the film wrapping action is completed, the blue film is pressed tightly onto the pressure base by the film pressing rod, and the blue film can be cut immediately. Unlike in the past, it is not necessary to return the film pulling assembly to the initial point and for the pushing mechanism to withdraw from the battery output channel during the blue film cutting process. The two steps can be performed simultaneously, which can improve efficiency.

[0016] According to an embodiment of the second aspect of the present invention, the pressure-bearing base is fixedly disposed on the side of the third frame near the film-stretching mechanism.

[0017] According to an embodiment of a second aspect of the present invention, the coating mechanism further includes a cutter assembly for cutting the blue film, the cutter assembly being mounted on the third frame.

[0018] According to an embodiment of a third aspect of the present invention, a battery coating process is provided, using the coating equipment described in the second aspect of the present invention, comprising the following steps: a pushing mechanism pushes the battery from the battery input channel to the battery output channel, and the coating mechanism performs coating; after the battery is coated, the pushing mechanism withdraws from the battery output channel, drives the pressing rod to press the blue film onto the pressure base, and cuts the blue film at the large end of the battery surface; the film pulling assembly returns to the initial point to adhere the blue film, drives the pressing rod away from the pressure base, releases the blue film pressed by the pressing assembly, and the film pulling assembly pulls the adhered blue film to the target position.

[0019] The above-mentioned battery coating process has at least the following beneficial effects: After the coating action is completed, the pushing mechanism exits from the battery output channel, and the pressing rod first presses the blue film onto the pressure base, so that the blue film can be cut immediately. The blue film cutting can be carried out at the same time as the pushing mechanism exits. In this way, there is no need to wait for the time of lifting the film pulling rod and the time of pressing the blue film for adhesion before cutting the blue film, as in the past. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0021] Figure 1 This is a schematic diagram of the coating device in an embodiment of the present invention;

[0022] Figure 2 This is a front view of the coating device in an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the film-stretching mechanism in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the coating mechanism in an embodiment of the present invention;

[0025] Figure 5 This is a side view of the coating mechanism in an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the coating device in an embodiment of the present invention performing the first action;

[0027] Figure 7 yes Figure 6 A magnified view of a section of circle A;

[0028] Figure 8 This is a schematic diagram of the structure of the coating device in an embodiment of the present invention when performing the second action;

[0029] Figure 9 yes Figure 8 A magnified view of a section of circle B in the middle;

[0030] Figure 10 This is a schematic diagram of the coating device performing the third action in an embodiment of the present invention;

[0031] Figure 11 yes Figure 10 A magnified view of a section of the C-ring;

[0032] Figure 12 This is a schematic diagram of the coating device performing the fourth action in an embodiment of the present invention;

[0033] Figure 13 yes Figure 12 A magnified view of a section of the D-ring;

[0034] Figure 14 This is a schematic diagram of the coating device performing the fifth action in an embodiment of the present invention;

[0035] Figure 15 yes Figure 14 A magnified view of a section of the E-ring.

[0036] Reference numerals: 100 for pushing mechanism, 111 for first frame, 121 for pushing block, 122 for pushing screw, 123 for pushing drive source, and 124 for pushing sliding track component;

[0037] The film pulling mechanism 200, the second frame 211, the connecting base 212, the tension assembly 220, the film pushing rod 231, the film pulling rod 241, the transmission component 242, the third drive source 243, the film pressing rod 251, the pressure bearing base 252, the sliding frame 253, the film passing channel 254, the front row pressure roller assembly 261, and the blue film 270;

[0038] The coating mechanism 300, the third frame 311, the upper pressure roller 321, the upper pressure roller screw 322, the upper pressure roller motor 323, the lower pressure roller 331, the lower pressure roller screw 332, the lower pressure roller motor 333, the rear pressure roller assembly 341, the rear pressure roller cylinder 342, the blocking block 343, the blocking cylinder 344, the conveying roller 345, the conveying roller motor 346, and the cutter assembly 351;

[0039] Battery 400. Detailed Implementation

[0040] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0041] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0042] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0043] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0044] The following reference Figure 1 and Figure 2 This describes a coating apparatus according to an embodiment of the present invention.

[0045] The following reference Figure 3 This describes a film-stretching mechanism 200 according to an embodiment of the present invention, which can be applied to a coating equipment.

[0046] like Figure 2 According to an embodiment of the present invention, the film-stretching mechanism 200 includes a film-stretching assembly and a pre-pressing assembly, wherein the film-stretching assembly is used to perform a film-stretching action. Further, the film-stretching mechanism 200 also includes a second frame 211, which includes a first upright plate and a second upright plate, the first upright plate and the second upright plate being spaced apart along the width direction of the second frame 211.

[0047] like Figure 2 As shown, the film-stretching assembly includes a film-stretching rod 241 and a third drive source 243 that drives the film-stretching rod 241 to move up and down. The third drive source 243 is connected to the film-stretching rod 241 via a transmission component 242. After being driven upward by the third drive source 243, the film-stretching rod 241 reaches below the pressure rod 251 to adhere the film. The film-stretching rod 241 extends from one side of the first upright plate to the other side of the second upright plate. The aforementioned third drive source 243 is a motor or other conventional shaft drive assembly, and the transmission component 242 can be a belt conveyor mechanism. For example, in... Figure 2In the illustrated embodiment, the third drive source 243 is a motor, and the transmission component 242 includes a driving wheel and a driven wheel rotatably mounted on the outside of the first upright plate. The driving wheel and the driven wheel are connected by a transmission belt, and the driving wheel is driven by the motor. Additionally, a third slide rail is provided on the second frame to allow the film-pulling rod 241 to slide up and down. Specifically, connecting plates can be provided at both ends of the film-pulling rod 241, and then the third slide rail is provided between the connecting plates and the second frame. The third slide rail uses a guide rail slider structure.

[0048] like Figure 6 and Figure 7 As shown, the pre-pressing assembly includes a pressing rod 251 and a pressure-bearing base 252. Specifically, the pressing rod 251 is connected to and driven by a fourth drive source, and the pressure-bearing base 252 is fixedly disposed on the opposite side of the pressing rod 251. A film-passing channel 254 for the blue film to pass through is provided between the pressing rod 251 and the pressure-bearing base 252. The pressing rod 251 extends from one side of the first upright plate to the other side of the second upright plate. The fourth drive source can be a cylinder, for example, a cylinder can be mounted on the second frame 211, and the piston rod of the cylinder can be directly or indirectly connected to the pressing rod 251.

[0049] The pressure rod 251 is driven by a fourth drive source to move towards the pressure-bearing base 252, so as to press the pressure-bearing base 252 before the film-pulling assembly returns, thereby allowing the blue film 270 of the pre-pressing assembly to be cut immediately after the battery is encapsulated. The pressure rod 251 presses the pressure-bearing base 252, which can be combined with… Figure 10 and Figure 11 To understand this, in this embodiment, the pressure-bearing base 252 has a pressure-bearing end face facing the pressure-bearing rod 251; the pressure-bearing rod 251 has an arc-shaped surface facing the pressure-bearing base 252. After the pressure-bearing rod 251 moves, it presses the blue film 270 against the pressure-bearing base 252. The pressure-bearing end face of the pressure-bearing base 252 is a plane, which serves to adhere the blue film. When the arc-shaped surface of the pressure-bearing rod 251 presses against the pressure-bearing base 252, the force-bearing area is small, which can effectively stick the blue film together and maintain a certain pressure. The pressure-bearing rod 251 is driven away from the pressure-bearing base 252 by a fourth driving source, so that when the film-pulling assembly performs the film-pulling action, the blue film 270 can move in the film-penetrating channel 254. The state of the pressure-bearing rod 251 moving away from the pressure-bearing base 252 can be combined with... Figure 6 and Figure 7 Establish a connection.

[0050] Understandably, after the coating equipment completes the coating action, the pushing mechanism retracts from the coating mechanism, the film pulling assembly does not return, and the pressure rod 251, driven by the fourth drive source, moves towards the pressure base 252. The pressure rod 251 presses the blue film 270 firmly onto the pressure base 252. Figure 10 and Figure 11During the connection process, the blue film at the large end of the battery (i.e., the blue film at the rear of the pre-pressing assembly) can be immediately cut. The blue film cutting occurs simultaneously with the material pushing mechanism's exit from the wrapping mechanism, eliminating the need to wait for the film pulling assembly to return. This saves time and increases production cycle time. The film pulling assembly then lifts and re-adheres the blue film 270, the pressing rod 251 moves away from the pressure base 252, and the film pulling assembly pulls the blue film 270 to the wrapping position for re-wrapping the battery.

[0051] Reference Figure 2 The second frame 211 is equipped with a sliding frame 253, which is directly or indirectly connected to the second frame 211 via a fourth slide rail. The driving end of a fourth drive source is connected to the sliding frame 253 to drive it to move along the fourth slide rail, thereby moving the sliding frame 253 closer to or away from the pressure base 252. A pressure rod 251 is mounted on the sliding frame 253. Specifically, the sliding frame 253 includes a pressure crossbar and two connecting rods extending upward from both ends of the pressure crossbar. The pressure rods 251 are mounted on the side of the pressure crossbar facing the pressure base 252. The tops of the two connecting rods are slidably connected to the inner surfaces of the first and second vertical plates via the fourth slide rail. The second frame 211 is equipped with a connecting base 212, and the fourth slide rails on both sides of the top of the sliding frame 253 are respectively mounted on the connecting base 212. In this embodiment, the fourth driving source is a cylinder. The piston rod of the cylinder is connected to the sliding frame 253, and the sliding frame 253 is controlled by extension and retraction, thereby controlling the pressure rod 251 to press against the pressure base 252 or move away from the pressure base 252.

[0052] In some embodiments, the displacement of the sliding frame 253 toward the pressing pressure base 252 is controlled by the piston extension and retraction of the cylinder. A pressure sensor can be installed on the pressure base, and the cylinder controls the extension and retraction based on the pressure information value fed back by the pressure sensor.

[0053] In addition, the second frame 211 is also provided with a film pusher rod 231. The film pusher rod 231 is connected to the second frame 211 via a second sliding member. The specific installation position and structure of the second sliding member can be adapted by those skilled in the art. For example, a crossbeam can be fixedly installed on the second frame, and the second sliding member can be installed on the crossbeam. The film pusher rod 231 slides along the crossbeam via the second sliding member. The film pusher rod is connected to a second drive source, and the drive end of the second drive source is connected to the film pusher rod 231 to drive the film pusher rod 231 to move along the second slide rail.

[0054] like Figure 3As shown, the pusher rod 231 is located above the pressure rod 251. The positions of the pressure rod and the pusher rod can be adjusted by those skilled in the art according to the specific battery wrapping situation. Both the fourth and second slide rail components use two sets of guide rail slider structures. The second drive source can refer to the fourth drive source, also using a cylinder. The specific function of the pusher rod is to provide tension to the blue film during wrapping; and to tilt the blue film. When the battery reaches the blue film, the bottom corners are adhered first. Tilting the blue film prevents the bottom blue film from being already adhered after the battery reaches the position, which would generate a large number of wrinkles and bubbles. The specific function of the pusher rod will also be described in the following description of the specific operation of the wrapping equipment.

[0055] In addition, the second frame 211 is also equipped with a tension assembly 220, which is located at the top of the second frame 211. This tension assembly increases the tension of the battery film. The tension assembly 220 continuously presses down, increasing the tension of the battery film. The tension assembly includes a tension detection sensor. Specifically, the tension assembly 220 includes a tension roller and a first drive source for driving the tension roller downwards. The first drive source is also a cylinder. Both sides of the tension roller are connected to the second frame via first slide rails. Extending the cylinder allows the tension roller to press down.

[0056] like Figure 1 and Figure 2 The present invention describes a coating apparatus according to an embodiment of the present invention, including a feeding mechanism 100, the film pulling mechanism 200, and a coating mechanism 300.

[0057] The membrane stretching mechanism 200 has a battery input channel.

[0058] The pusher mechanism 100 is used to push the battery into the battery input channel. For example... Figure 6As shown, the pushing mechanism 100 includes a first frame 111 and a pushing component mounted on the first frame 111. The pushing component includes a pushing drive source 123 mounted on the first frame 111 and a pushing block 121 driven by the pushing drive source 123. The pushing block 121 is used to push the battery to move into the battery input channel. The pushing drive source 123 is a motor, and the motor drive shaft is connected to a pushing lead screw 122. The pushing lead screw 122 is connected to the pushing block 121 to realize linear drive of the pushing block 121. Correspondingly, a pushing sliding track 124 is provided between the pushing block 121 and the first frame 111. The pushing lead screw 122 adopts a lead screw and nut mechanism, which is prior art and will not be described in detail. In some embodiments, the pushing drive source can also be a cylinder push rod, an electric push rod, or other conventional linear drive components. For example, the pushing block can also be driven to move by a cylinder push rod. The first frame 111 is provided with a support roller assembly for the battery to slide. The front pressure roller assembly 261 in the film pulling mechanism 200 is located above the support roller assembly, and the battery is pressed tightly against the support roller assembly. A battery input channel is formed between the front pressure roller assembly 261 and the support roller assembly.

[0059] like Figure 4 and Figure 5 As shown, the coating mechanism 300 includes a third frame 311. The third frame 311 has an upper pressure roller 321 and a lower pressure roller 331 on the side near the film stretching mechanism 200. A battery output channel is formed between the upper pressure roller 321 and the lower pressure roller 331. The battery output channel is connected to the battery input channel to receive the battery transmitted by the battery input channel and perform coating. There is an operating space between the battery output channel and the battery input channel for the film stretching assembly to perform film stretching.

[0060] Specifically, in this embodiment, the pressure-bearing base 252 is fixedly disposed on the side of the third frame 311 near the film-pulling mechanism 200. In other embodiments, a connecting frame can be provided on the second frame to install the pressure-bearing base 252. In this embodiment, the pressure-bearing base 252 is installed on the third frame 311 when the third frame is close to the second frame. In this embodiment, the film-pressing rod 251 and the pressure-bearing base 252 of the pre-pressing assembly are disposed on opposite sides. The pressure-bearing base 252 is fixedly disposed on the third frame 311. The film-pressing rod 251 moves toward or away from the pressure-bearing base 252. The height position of the film-pressing rod 251 and the pressure-bearing base 252 in the coating equipment can be adjusted before coating according to the battery height and the initial position of the film-pulling rod. During the coating process, the pressure-bearing base 252 remains stationary relative to the second frame.

[0061] The coating mechanism also includes a cutter assembly 351 for cutting the blue film 270, and the cutter assembly 351 is mounted on the third frame 311. The cutter assembly 351 is prior art and will not be described in detail.

[0062] like Figure 5 As shown, the upper pressure roller motor 323 is connected to the upper pressure roller screw 322, which drives the upper pressure roller 321 to move up and down; the lower pressure roller motor 333 is connected to the lower pressure roller screw 332, which drives the lower pressure roller 331 to move up and down. The screw-nut mechanism of the upper pressure roller screw 322 and the lower pressure roller screw 332 is prior art and will not be described in detail.

[0063] This embodiment also presents a battery coating process using the aforementioned coating equipment, comprising the following steps: a pushing mechanism pushes the battery from the battery input channel to the battery output channel, and the coating mechanism performs coating; after the battery is coated, the pushing mechanism withdraws from the battery output channel, drives the pressing rod to press the blue film onto the pressure base, and cuts the blue film at the large end of the battery surface; the film pulling assembly returns to the initial point to adhere the blue film, drives the pressing rod away from the pressure base, releases the blue film pressed by the pressing assembly, and the film pulling assembly pulls the adhered blue film to the target position.

[0064] The following will combine Figures 6 to 15 To describe the specific actions of the film-coating equipment using the above-mentioned film-pulling mechanism:

[0065] Reference Figure 6 and Figure 7 At this time, the coating equipment performs the first action: the film pulling rod 241 pulls the blue film 270 to the coating position. In this embodiment, the blue film is the battery blue film. The film pushing rod 231 pushes out to tighten the blue film 270, and the tension roller of the tension component 220 continuously presses down to increase the tension of the blue film 270.

[0066] Reference Figure 8 and Figure 9 At this point, the coating equipment performs the second action: the pushing mechanism 100 pushes the battery close to the blue film 270, specifically by driving the pushing block to move the battery. Using the lower pressure roller 331 to press the blue film at the bottom of the battery, the pushing mechanism 100 continues to push the battery into the blue film position of the battery pack and wraps the large surface of the battery. The upper and lower pressure rollers 321 press the large surface of the battery during wrapping to prevent air bubbles from forming. The upper pressure roller motor 323 can drive the upper pressure roller 321 to move up and down, and the lower pressure roller motor 333 can drive the lower pressure roller 321 to move up and down.

[0067] Reference Figure 10 and Figure 11 At this point, the coating equipment performs the third action: the pressure rod 251 extends and presses the blue film 270 onto the pressure base 252. Simultaneously, the pusher block of the pusher mechanism 100 is located in the battery output channel of the coating mechanism.

[0068] Reference Figure 12 and Figure 13At this point, the coating equipment performs its fourth action: the pusher block of the pusher mechanism 100 exits from the battery output channel of the coating mechanism. Simultaneously, the cutter assembly 351 moves laterally, cutting the blue film 270 to complete the battery coating. Then, the battery is moved to the discharge position by the transport assembly in the coating mechanism 300 to await transport to the next station. (Refer to...) Figure 4 The transport assembly includes transport rollers 345 and a rear pressure roller assembly 341 located above the transport rollers 345. A crossbeam is provided on the third frame 311, and the transport assembly is mounted on the crossbeam. The transport assembly can be driven by a transport roller motor 346 to move back and forth within the third frame 311. The specific drive transmission method can be referenced in the context of a film pulling rod. Those skilled in the art can further understand its application in conjunction with... Figure 4 To understand this, the rear pressure roller assembly 341 is driven to move up and down by the rear pressure roller cylinder 342. Additionally, the conveying assembly includes a blocking block 343, which is driven by a blocking cylinder 344 and prevents the rear pressure roller assembly 341 from overshooting during extension.

[0069] Reference Figure 14 and Figure 15 The pusher block 121 of the pusher mechanism 100 has returned to its original position, and the battery can be reinserted. At this time, the coating equipment performs the fifth action: the film pulling rod 241 is raised and the blue film 270 is re-adhered, and then the film pressing rod 251 is retracted and the blue film 270 is released. The film pulling rod 241 pulls the blue film 270 to the coating position to re-coat the next battery.

[0070] Understandably, in previous coating equipment, after the coating mechanism completed the coating action, when the blue film needed to be cut, the film pulling rod had to be returned to the initial point to receive a new blue film segment before cutting could be performed. However, to raise the pulling rod to the initial point, the pushing mechanism had to be withdrawn from the coating mechanism first; otherwise, the pulling rod would interfere with the pushing mechanism. Thus, the pushing mechanism had to be withdrawn from the coating mechanism first, and then the film pulling rod had to be raised to the initial point before the blue film could be cut. These steps had to be performed sequentially, making the coating efficiency inefficient.

[0071] In this application, after the battery is coated, the pushing mechanism retracts from the coating mechanism. Simultaneously, the pressing rod in the pre-pressing assembly moves towards the pressure-bearing base, pressing the blue film at the end of the large surface of the battery, thus fixing the unwinding end of the blue film roll. At this point, the blue film can be cut immediately. Because the unwinding end of the blue film roll is clamped and fixed by the pressing rod and the pressure-bearing base, the unwinding end of the blue film at the end of the large surface of the battery will not experience any positional shift such as swaying or rolling after cutting.

[0072] Understandably, the blue film can be cut simultaneously as the pushing mechanism retracts from the coating mechanism, without waiting for the film pulling assembly to return. This means the pushing mechanism's retraction and blue film cutting can occur concurrently, improving production cycle time and coating efficiency. Afterward, the film pulling assembly lifts and re-adheres the blue film, the pressure rod moves away from the pressure base, and the film pulling assembly pulls the blue film to the coating position for re-coating the battery.

[0073] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A coating device, characterized in that: include A film-pulling mechanism, having a battery input channel, includes a film-pulling assembly and a pre-pressing assembly. The film-pulling assembly performs the film-pulling action, and the pre-pressing assembly includes a pressing rod and a pressure-bearing base. The pressure rod is connected to a fourth drive source and is driven to move by the fourth drive source. The pressure-bearing base is fixedly disposed on the opposite side of the pressure rod. There is a membrane passage between the pressure rod and the pressure-bearing base for the blue film to pass through. The pressure rod is driven by the fourth drive source to move toward the pressure-bearing base so as to press the pressure-bearing base when the film-pulling assembly has not returned, so that the blue film of the rear section of the pre-pressing assembly can be cut immediately after the battery is wrapped. The pressure rod is driven away from the pressure-bearing base by the fourth drive source, so that when the film pulling assembly performs the film pulling action, the blue film can move in the film penetration channel. A feeding mechanism is used to push the battery into the battery input channel; The coating mechanism includes a third frame, on the side near the film stretching mechanism, an upper pressure roller and a lower pressure roller are provided, a battery output channel is formed between the upper pressure roller and the lower pressure roller, the battery output channel is connected to the battery input channel to receive the battery transmitted by the battery input channel and perform coating, and there is an operating space between the battery output channel and the battery input channel for the film stretching assembly to perform film stretching; The pressure-bearing base has a pressure-bearing end face facing the pressure rod; The pressure rod has an arcuate surface facing the pressure-bearing base; The film stretching mechanism further includes a second frame, which is provided with a sliding frame. The sliding frame is directly or indirectly connected to the second frame via a fourth slide rail. The driving end of the fourth drive source is connected to the sliding frame to drive the sliding frame to move along the fourth slide rail, thereby moving the sliding frame closer to or away from the pressure-bearing base. The film pressing rod is mounted on the sliding frame. The film stretching mechanism further includes a second frame, which includes a first upright plate and a second upright plate. The first upright plate and the second upright plate are spaced apart along the width direction of the second frame. The film pressing rod extends from one side of the first upright plate to one side of the second upright plate. The sliding frame includes a film pressing crossbar and two connecting rods extending upward from both ends of the film pressing crossbar. The film pressing rod is installed on the side of the film pressing crossbar facing the pressure-bearing base. The tops of the two connecting rods are slidably connected to the inner side of the first upright plate and the inner side of the second upright plate respectively through the fourth slide rail. The film-pulling assembly includes a film-pulling rod and a third driving source for driving the film-pulling rod to move up and down. The third driving source is connected to the film-pulling rod through a transmission component. After being driven upward by the third driving source, the film-pulling rod reaches the area below the pressure rod to adhere the film.

2. The coating device according to claim 1, characterized in that: The pressure-bearing base is fixedly installed on the side of the third frame near the film-pulling mechanism.

3. The coating device according to claim 2, characterized in that: The coating mechanism also includes a cutter assembly for cutting the blue film, the cutter assembly being mounted on the third frame.

4. A battery packing process, characterized in that, Using the coating apparatus according to any one of claims 1 to 3 includes the following steps: The feeding mechanism pushes the battery from the battery input channel to the battery output channel, and the coating mechanism then coats it. After the battery is coated, the pushing mechanism exits from the battery output channel and drives the pressing rod to press the blue film onto the pressure base, and cuts the blue film at the end of the large surface of the battery. The film-pulling assembly returns to the initial point to adhere the blue film, drives the pressure rod away from the pressure base, releases the blue film that was previously pressed by the pressure assembly, and pulls the adhered blue film to the target position.

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