A lithium battery cell soft package pre-heating softening device

Abstract

The utility model relates to lithium battery technical field discloses a kind of lithium battery cell soft package front heating softening device, and the device includes processing box, and processing box surface is equipped with rotatable material fixing mechanism and heating softening mechanism. Rotatable material fixing mechanism contains shaft, motor, fixed plate, controller, telescopic push rod, placement seat, spring post and antiskid clamping plate, controller adjusts telescopic push rod and can be adapted to different size battery, spring post and antiskid clamping plate avoid hard contact damage, motor drives structure rotation to realize uniform heating, annular distribution placement seat improves batch processing efficiency, heating softening mechanism includes heating box, inner box, porous baffle, electric heating tube, fan, temperature monitoring sensor, exhaust fan and dust screen, electric heating tube heat production is evenly radiated by fan and porous baffle, the device is strong in adaptability, high in safety, heated evenly and high in efficiency, and it is applicable to heating softening process before lithium battery soft package battery production packaging.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, specifically to a preheating and softening device for lithium battery cell pouches. Background Technology

[0002] In the production of lithium-ion battery pouch cells, after the electrodes and separators are laminated, they need to be encapsulated. Before encapsulation, air bubbles and insufficient interlayer adhesion are common problems inside the cell, directly affecting subsequent electrolyte injection and cell performance. Traditional processes often rely on natural settling or simple pressurization, which is difficult to efficiently eliminate internal gaps and can easily lead to electrode displacement and separator wrinkles. To solve this problem, a heating softening device is needed. This device uses precise temperature control to soften the separator and slightly deform the electrodes, improving interlayer adhesion while avoiding high-temperature damage to the materials. This lays the foundation for subsequent encapsulation processes and meets the production requirements of high-capacity, high-safety lithium-ion batteries.

[0003] According to a patent application published on the internet (authorization announcement number: CN219759666U), a pre-heating and softening device for a lithium battery cell pouch is described as follows: "This utility model discloses a pre-heating and softening device for a lithium battery cell pouch, including a base, a cylindrical shell on the base, a top cover on the top of the cylindrical shell, a power source mounted on the top cover, an output shaft of the power source connected to a rotating shaft, the rotating shaft passing through the top cover, and the lower end of the rotating shaft rotatably connected to the base, a ring rail on the upper surface of the base, and a plurality of sliders evenly distributed on the ring rail, the sliders being connected to..." The base plate is connected to the lower end of a rotating shaft on its lower surface. A sliding plate is connected to the rotating shaft via a threaded sleeve. Guide rods are installed around the perimeter of the sliding plate, with their lower ends connected to the base plate. A hot air grid is installed on the base. This design is simple, reasonable, and innovative. The base plate supports the placement of the battery cells, and the sliding rods, in conjunction with the threaded sleeve, move the sliding plate downwards under the rotation of the rotating shaft, securing the battery cells placed on the base plate. Simultaneously, the rotating shaft drives the base plate to rotate, allowing hot air blown from the hot air grid to heat and soften the battery cells, facilitating the soft-packing process.

[0004] Based on the above, the applicant believes the following deficiencies exist:

[0005] The lithium battery cell pouch preheating and softening device uses a rotating shaft to drive the base plate to rotate, so that the hot air blown from the hot air grid heats and softens the cells, facilitating the pouch operation. However, the existing device has problems such as poor adaptability, easy damage to cells, uneven heating, and low processing efficiency. Traditional devices do not have an adjustable material fixing mechanism, and cannot adjust the fixed spacing. They can only adapt to a single or very narrow range of lithium battery cell pouch sizes. When dealing with cells of different specifications, it is necessary to change the clamps or equipment. At the same time, the single processing volume is small, the batch efficiency is low, and the number of cells processed per unit time is limited, making it impossible to achieve continuous batch operation. Utility Model Content

[0006] The purpose of this invention is to provide a preheating and softening device for lithium battery cell pouches to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a preheating and softening device for lithium battery cell pouches, comprising a processing box, a rotatable material fixing mechanism on the surface of the processing box, and a heating and softening mechanism on the surface of the processing box;

[0008] The rotatable material fixing mechanism includes a rotating shaft rotatably connected to the center of the processing box. A motor frame is fixedly connected to the center of the left side of the processing box, and a motor is installed inside the motor frame. A first fixing plate is fixedly connected to the left end of the center of the rotating shaft, and a second fixing plate is fixedly connected to the right end of the rotating shaft. Controllers are installed at the front and rear ends of the right side of the second fixing plate. A telescopic push rod is installed on the left side of the controller, and a connecting plate is installed on the left side of the telescopic push rod. Placement seats are fixedly connected to the inner surfaces of both the first fixing plate and the connecting plate. A spring column is fixedly connected inside the placement seat, and an anti-slip clamp is fixedly connected to the surface of the spring column. The telescopic push rod, adjusted by the controller, moves the connecting plate left and right, which, together with the first fixing plate, can accommodate soft-pack lithium battery cells of different sizes. At the same time, the spring column inside the placement seat pushes the anti-slip clamp to clamp the battery cell, which can not only fix it firmly but also avoid damage to the battery cell by hard contact. The motor drives the first fixing plate, the second fixing plate, and the battery cell to rotate through the rotating shaft, so that all sides of the battery cell can be evenly contacted by the heat generated by the heating and softening mechanism, which solves the problem of uneven softening caused by traditional fixed heating. In addition, the placement seat is distributed in a ring on the outer end of the inner surface of the first fixing plate and the connecting plate, which can fix multiple sets of battery cells at the same time. Combined with rotational heating, it greatly improves the batch efficiency of softening process.

[0009] Preferably, the rotating shaft is fixedly connected to the output end on the right side of the motor frame, and both the rotating shaft and the motor are located at the center of the left side of the processing box.

[0010] Preferably, the placement seats are arranged in a ring around the outer ends of the inner surfaces of the first fixing plate and the connecting plate, and the anti-slip clamp is fixedly connected to the end of the spring column away from the placement seats.

[0011] Preferably, the heating and softening mechanism includes a heating chamber, which is fixedly connected to the top and bottom center of a processing chamber. An inner chamber is fixedly connected to both the top and bottom of the processing chamber. A perforated flow divider is installed at the top of the inner chamber. An electric heating element is installed inside the inner chamber. A fan frame is installed inside the heating chamber, and a fan is installed at the inner end of the fan frame. A temperature monitoring sensor is installed at the rear end of the processing chamber. A back frame is fixedly connected to the top of the left and right sides of the back of the processing chamber. A heat exhaust fan is installed inside the back frame. A dustproof net is installed at the rear of the internal frame. After the heating element generates heat, the fan blows the hot air into the inner chamber, and then the air is evenly distributed into the processing chamber through a multi-hole distribution plate, which quickly raises the temperature inside the chamber. Four sets of temperature monitoring sensors monitor the temperature inside the chamber in real time, which facilitates precise control of the softening temperature and avoids damage to the battery cells due to excessively high temperatures or insufficient softening due to excessively low temperatures. After processing, the exhaust fan in the rear frame can quickly expel the hot air from the chamber, shorten the equipment cooling time, and facilitate subsequent operations. At the same time, the dustproof net can prevent external dust from entering the chamber and avoid dust adhering to the surface of the battery cells, which would affect product quality.

[0012] Preferably, the heating element, fan bracket, and fan are all designed to be detachable, and four sets of temperature monitoring sensors are provided.

[0013] Preferably, the bottom of the left and right sides of the processing box is fixedly connected to support feet, the front of the processing box is equipped with a sealed door, and the front of the sealed door is fixedly connected to an observation window.

[0014] Compared with the prior art, this utility model provides a preheating and softening device for lithium battery cell pouches, which has the following beneficial effects:

[0015] 1. This lithium battery cell soft pack preheating and softening device is equipped with a rotatable material fixing mechanism. By adjusting the telescopic push rod through the controller, the connecting plate can be moved left and right. Together with the first fixing plate, it can accommodate lithium battery cell soft packs of different sizes. At the same time, the spring column in the placement seat pushes the anti-slip clamp to clamp the cell, which can not only fix it firmly but also avoid hard contact damage to the cell. The motor drives the first fixing plate, the second fixing plate and the cell to rotate through the rotating shaft, so that all sides of the cell can be evenly contacted with the heat generated by the heating and softening mechanism. This solves the problem of uneven softening caused by traditional fixed heating. In addition, the placement seat is distributed in a ring on the outer end of the inner surface of the first fixing plate and the connecting plate, which can fix multiple sets of cells at the same time. Combined with rotational heating, it greatly improves the batch efficiency of softening process.

[0016] 2. The lithium battery cell soft pack preheating and softening device is equipped with a heating and softening mechanism. After the heating tube generates heat, the fan blows hot air into the inner box, and then the hot air is evenly distributed into the processing box through the multi-hole distribution plate, which quickly raises the temperature inside the box. Four sets of temperature monitoring sensors monitor the temperature inside the box in real time, which facilitates precise control of the softening temperature and avoids damage to the cell due to excessive temperature or failure to soften due to excessive temperature. After processing, the exhaust fan in the back frame can quickly exhaust the hot air inside the box, shorten the equipment cooling time, and facilitate subsequent operations. At the same time, the dustproof net can prevent external dust from entering the box and avoid dust adhering to the surface of the cell, which will affect the product quality. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the rotatable material fixing mechanism of this utility model;

[0021] Figure 4 This is a schematic diagram of the telescopic push rod structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the heating and softening mechanism of this utility model.

[0023] Figure 6 This is a schematic diagram of the temperature monitoring sensor structure of this utility model.

[0024] In the diagram: 1. Processing box; 2. Support legs; 3. Sealed door; 4. Observation window; 5. Rotatable material fixing mechanism; 51. Rotating shaft; 52. Motor frame; 53. Motor; 54. First fixing plate; 541. Second fixing plate; 55. Controller; 56. Telescopic push rod; 57. Connecting plate; 58. Placement seat; 59. Spring column; 501. Anti-slip clamp; 6. Heating and softening mechanism; 61. Heating box; 62. Inner box; 63. Perforated diversion plate; 64. Electric heating tube; 65. Fan frame; 66. Fan; 67. Temperature monitoring sensor; 68. Back frame; 69. Exhaust fan; 601. Dustproof net. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] This utility model provides the following technical solution:

[0028] Example 1

[0029] Please see Figure 1-6 A preheating and softening device for lithium battery cell pouches includes a processing box 1, a rotatable material fixing mechanism 5 on the surface of the processing box 1, and a heating and softening mechanism 6 on the surface of the processing box 1.

[0030] The rotatable material fixing mechanism 5 includes a rotating shaft 51, which is rotatably connected to the center of the processing box 1. A motor frame 52 is fixedly connected to the center of the left side of the processing box 1, and a motor 53 is installed inside the motor frame 52. A first fixing plate 54 is fixedly connected to the left end of the center of the rotating shaft 51, and a second fixing plate 541 is fixedly connected to the right end of the rotating shaft 51. A controller 55 is installed at both the front and rear ends of the right side of the second fixing plate 541. A telescopic push rod 56 is installed on the left side of the controller 55, and a connecting plate 57 is installed on the left side of the telescopic push rod 56. A placement seat 58 is fixedly connected to the inner surface of both the first fixing plate 54 and the connecting plate 57. A spring column 59 is fixedly connected inside the placement seat 58, and an anti-slip clamp 501 is fixedly connected to the surface of the spring column 59. The controller 55 adjusts the telescopic push rod 56, which can drive the connecting plate 57 to move left and right. Together with the first fixing plate 54, it can adapt to different sizes of lithium battery cell pouches. At the same time, the spring column 59 in the placement seat 58 pushes the anti-slip clamp 501 to clamp the cell, which can not only fix it firmly, but also avoid hard contact damage to the cell. The motor 53 drives the first fixing plate 54, the second fixing plate 541 and the cell to rotate through the rotating shaft 51, so that all surfaces of the cell can be evenly contacted with the heat generated by the heating and softening mechanism 6, which solves the problem of uneven softening caused by traditional fixed heating. At the same time, the placement seat 58 is distributed in a ring on the outer end of the inner surface of the first fixing plate 54 and the connecting plate 57, which can fix multiple sets of cells at the same time. Combined with rotational heating, it greatly improves the batch efficiency of softening process.

[0031] The rotating shaft 51 is fixedly connected to the right output end of the motor frame 52, and both the rotating shaft 51 and the motor 53 are located at the center of the left side of the processing box 1.

[0032] The placement base 58 is arranged in a ring on the outer end of the inner surface of the first fixing plate 54 and the connecting plate 57, and the anti-slip clamp 501 is fixedly connected to the end of the spring column 59 away from the placement base 58.

[0033] Example 2

[0034] Please see Figure 1-6Furthermore, based on Embodiment 1, the heating and softening mechanism 6 further includes a heating chamber 61, which is fixedly connected to the top and bottom center of the processing chamber 1. An inner chamber 62 is fixedly connected to both the top and bottom of the processing chamber 1. A perforated flow divider 63 is installed at the top of the inner chamber 62, and an electric heating tube 64 is installed inside the inner chamber 62. A fan frame 65 is installed inside the heating chamber 61, and a fan 66 is installed at the inner end of the fan frame 65. A temperature monitoring sensor 67 is installed at the rear end of the processing chamber 1. A back frame 68 is fixedly connected to the top of the left and right sides of the back of the processing chamber 1, and a heat exhaust fan 69 is installed inside the back frame 68. A dustproof net 601 is installed at the rear end of the back frame 68. After the heating tube 64 generates heat, the fan 66 blows the hot air into the inner box 62, and then the hot air is evenly distributed into the processing box 1 through the multi-hole distribution plate 63, which quickly raises the temperature inside the box. Four sets of temperature monitoring sensors 67 monitor the temperature inside the box in real time, which facilitates precise control of the softening temperature and avoids damage to the battery cells due to excessively high temperature or failure to soften due to excessively low temperature. After processing, the exhaust fan 69 in the back frame 68 can quickly exhaust the hot air inside the box, shorten the equipment cooling time, and facilitate subsequent operations. At the same time, the dustproof net 601 can prevent external dust from entering the box and avoid dust adhering to the surface of the battery cells, which would affect product quality.

[0035] The heating element 64, fan bracket 65 and fan 66 are all designed to be detachable, and four sets of temperature monitoring sensors 67 are provided.

[0036] The bottom of the left and right sides of the processing box 1 is fixedly connected with support feet 2, and the front of the processing box 1 is equipped with a sealed door 3, and the front of the sealed door 3 is fixedly connected with an observation window 4.

[0037] In actual operation, when this device is used, the sealed door 3 is opened, and the rotatable material fixing mechanism 5 is adjusted according to the size of the battery cell. The battery cell is placed in the inner end of the placement seat 58 and fixed by the spring column 59 and the anti-slip clamp 501. The telescopic push rod 56 is adjusted by the controller 55, which can drive the connecting plate 57 to move left and right. With the first fixing plate 54, it can adapt to different sizes of lithium battery cell pouches. At the same time, the spring column 59 in the placement seat 58 pushes the anti-slip clamp 501 to clamp the battery cell, which can not only fix it firmly, but also avoid hard contact damage to the battery cell. The motor 53 drives the first fixing plate 54, the second fixing plate 541 and the battery cell to rotate through the rotating shaft 51, so that all surfaces of the battery cell can be evenly contacted by the heat generated by the heating and softening mechanism 6, which solves the problem of uneven softening caused by traditional fixed heating. At the same time, the placement seat 58 is distributed in a ring on the outer end of the inner surface of the first fixing plate 54 and the connecting plate 57, which can fix multiple sets of battery cells at the same time. With the rotation heating, the batch efficiency of softening process is greatly improved.

[0038] After placement, the device can be started to heat and soften the material. After the heating element 64 generates heat, the fan 66 blows hot air into the inner chamber 62, and then evenly distributes it into the processing chamber 1 through the porous distribution plate 63, quickly raising the temperature inside the chamber. Four sets of temperature monitoring sensors 67 monitor the temperature inside the chamber in real time, which facilitates precise control of the softening temperature and avoids damage to the battery cells due to excessively high temperature or insufficient softening due to excessively low temperature. After processing, the exhaust fan 69 in the back frame 68 can quickly exhaust the hot air inside the chamber, shorten the equipment cooling time, and facilitate subsequent operations. At the same time, the dustproof net 601 can prevent external dust from entering the chamber and avoid dust adhering to the surface of the battery cells, which would affect product quality.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A preheating and softening device for lithium battery cell pouches, comprising a processing housing (1), characterized in that: The surface of the processing box (1) is provided with a rotatable material fixing mechanism (5) and a heating and softening mechanism (6). The rotatable material fixing mechanism (5) includes a rotating shaft (51), which is rotatably connected to the center of the processing box (1). A motor frame (52) is fixedly connected to the center of the left side of the processing box (1). A motor (53) is installed inside the motor frame (52). A first fixing plate (54) is fixedly connected to the left end of the center of the rotating shaft (51). A second fixing plate (541) is fixedly connected to the right end of the rotating shaft (51). A controller (55) is installed at the front and rear ends of the right side of the second fixing plate (541). A telescopic push rod (56) is installed on the left side of the controller (55). A connecting plate (57) is installed on the left side of the telescopic push rod (56). A placement seat (58) is fixedly connected to the inner surface of the first fixing plate (54) and the connecting plate (57). A spring column (59) is fixedly connected inside the placement seat (58). An anti-slip clamp (501) is fixedly connected to the surface of the spring column (59).

2. The lithium battery cell soft-pack preheating and softening device according to claim 1, characterized in that: The rotating shaft (51) is fixedly connected to the output end on the right side of the motor frame (52), and both the rotating shaft (51) and the motor (53) are located at the center of the left side of the processing box (1).

3. The lithium battery cell preheating and softening device according to claim 1, characterized in that: The placement seat (58) is distributed in a ring on the outer end of the inner surface of the first fixing plate (54) and the connecting plate (57), and the anti-slip clamp (501) is fixedly connected to the end of the spring column (59) away from the placement seat (58).

4. The lithium battery cell preheating and softening device according to claim 1, characterized in that: The heating and softening mechanism (6) includes a heating box (61), which is fixedly connected to the top and bottom center of the processing box (1). The top and bottom of the processing box (1) are both fixedly connected to an inner box (62). A perforated diverter plate (63) is installed on the top of the inner box (62). An electric heating tube (64) is installed inside the inner box (62). A fan frame (65) is installed inside the heating box (61). A fan (66) is installed at the inner end of the fan frame (65). A temperature monitoring sensor (67) is installed at the rear end of the processing box (1). A back frame (68) is fixedly connected to the top of the left and right sides of the back of the processing box (1). A heat exhaust fan (69) is installed inside the back frame (68). A dustproof net (601) is installed at the rear end of the back frame (68).

5. The lithium battery cell preheating and softening device according to claim 4, characterized in that: The heating element (64), fan bracket (65) and fan (66) are all designed to be detachable, and four sets of temperature monitoring sensors (67) are provided.

6. The lithium battery cell preheating and softening device according to claim 1, characterized in that: The processing box (1) has support feet (2) fixedly connected to the bottom of the left and right sides. The processing box (1) has a sealed door (3) installed on the front. The sealed door (3) has an observation window (4) fixedly connected to the front.

Images