Thermal compounding roller device and thermal compounding equipment

Abstract

The utility model provides a thermal compounding roller device and thermal compounding equipment, the thermal compounding roller device comprises: a thermal compounding roller assembly, the thermal compounding roller assembly comprises a first thermal compounding roller and a second thermal compounding roller; the thermal composite pole piece assembly comprises a plurality of thermal composite pole piece group units, and each thermal composite pole piece group unit comprises a first side surface and a second side surface which are opposite to each other along the lamination direction of the thermal composite pole piece group unit; wherein the first thermal compounding roller and the second thermal compounding roller are arranged at an interval along the length direction of the thermal compounding pole piece assembly, and the first thermal compounding roller is arranged to roll the first side surface of the thermal compounding pole piece group unit, and the second thermal compounding roller is arranged to roll the second side surface of the thermal compounding pole piece group unit. And the second thermal compounding roller is used for rolling the second side surface of the thermal compounding pole piece group unit.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, specifically to a thermal composite roller device and thermal composite equipment. Background Technology

[0002] The battery electrode thermal bonding process uses a thermal bonding roller assembly to bond the positive electrode, separator, and negative electrode together to form a thermally bonded electrode assembly. In related technologies, the thermal bonding roller assembly includes an upper thermal bonding roller and a lower thermal bonding roller. The electrode assembly to be bonded is sandwiched between the upper and lower thermal bonding rollers. The upper and lower thermal bonding rollers respectively provide upper and lower rolling pressure forces to the electrode assembly to be bonded. When the upper and lower thermal bonding rollers simultaneously apply rolling pressure to each electrode unit of the electrode assembly, the upper and lower rolling pressure forces provided by the upper and lower thermal bonding rollers are difficult to keep consistent, which can lead to electrode warping or detachment during the thermal bonding process. Utility Model Content

[0003] The embodiments of this utility model provide a thermal lamination roller device and thermal lamination equipment, which can improve the technical problems of warping or dropping of sheets during the thermal lamination process.

[0004] In a first aspect, embodiments of the present invention provide a thermal composite roller device, comprising:

[0005] A thermal composite roller assembly, comprising a first thermal composite roller and a second thermal composite roller;

[0006] A thermally composite electrode assembly, the thermally composite electrode assembly comprising a plurality of thermally composite electrode group units, the thermally composite electrode group unit comprising a first side and a second side opposite to each other along the stacking direction of the thermally composite electrode group unit;

[0007] The first thermal bonding roller and the second thermal bonding roller are spaced apart along the length of the thermal bonding electrode assembly, and the first thermal bonding roller is configured to roll the first side of the thermal bonding electrode assembly unit, and the second thermal bonding roller is configured to roll the second side of the thermal bonding electrode assembly unit.

[0008] In one embodiment, the thermal composite roller assembly includes a first auxiliary thermal composite roller. The first thermal composite roller and the first auxiliary thermal composite roller are disposed opposite each other along the stacking direction of the thermal composite electrode assembly unit. The first thermal composite roller moves relative to the first auxiliary thermal composite roller along the stacking direction of the thermal composite electrode assembly unit to roll the first side surface of the thermal composite electrode assembly unit.

[0009] And / or, the thermal composite roller assembly includes a second auxiliary thermal composite roller, the second thermal composite roller and the second auxiliary thermal composite roller are disposed opposite each other along the stacking direction of the thermal composite electrode assembly, and the second thermal composite roller moves relative to the second auxiliary thermal composite roller along the stacking direction of the thermal composite electrode assembly to roll the second side of the thermal composite electrode unit.

[0010] In one embodiment, the distance between the first thermal composite roller and the second thermal composite roller along the length direction of the thermal composite electrode assembly is greater than or equal to the length of a single thermal composite electrode assembly unit.

[0011] In one embodiment, the plurality of thermally composite electrode assembly units include adjacent first thermally composite electrode assembly units and second thermally composite electrode assembly units. The first thermally composite roller is adapted to roll the first thermally composite electrode assembly unit and the second thermally composite electrode assembly unit, and the second thermally composite roller is adapted to roll the first thermally composite electrode assembly unit and the second thermally composite electrode assembly unit. The first thermally composite electrode assembly unit includes a first positive electrode, a first separator, a first negative electrode, and a second separator stacked sequentially. The second thermally composite electrode assembly unit includes a first separator, a second negative electrode, a second separator, and a second positive electrode stacked sequentially. The first separators of the first thermally composite electrode assembly unit and the second thermally composite electrode assembly unit are interconnected, and the second separators of the first thermally composite electrode assembly unit and the second thermally composite electrode assembly unit are interconnected.

[0012] In one embodiment, the rolling force provided by the first thermally composited roller to the first positive electrode of the first thermally composited electrode assembly unit is F1, and the rolling force provided by the first thermally composited roller to the first diaphragm of the second thermally composited electrode assembly unit is F2, wherein F1 is greater than F2; and / or, the rolling force provided by the second thermally composited roller to the second positive electrode of the second thermally composited electrode assembly unit is F3, and the rolling force provided by the second thermally composited roller to the second diaphragm of the first thermally composited electrode assembly unit is F4, wherein F3 is greater than F4.

[0013] In one embodiment, the thermal composite roller device further includes a first driving member connected to the first thermal composite roller and used to drive the first thermal composite roller to move toward or away from the thermal composite electrode assembly unit; and / or, the thermal composite roller device further includes a second driving member connected to the second thermal composite roller and used to drive the second thermal composite roller to move toward or away from the thermal composite electrode assembly unit.

[0014] In one embodiment, the thermal bonding roller device further includes a first monitoring element electrically connected to the first driving element. When the first monitoring element detects the first positive electrode, the first driving element drives the first thermal bonding roller to move toward the first positive electrode; when the first monitoring element detects the first diaphragm, the first driving element drives the first thermal bonding roller to move away from the first diaphragm; and / or,

[0015] The thermal composite roller device further includes a second monitoring element, which is electrically connected to the second driving element. When the second monitoring element detects the second positive electrode, the second driving element drives the second thermal composite roller to move toward the direction closer to the second positive electrode. When the second monitoring element detects the second diaphragm, the second driving element drives the second thermal composite roller to move away from the second diaphragm.

[0016] In one embodiment, the thermal composite roller device includes a first positive electrode conveyor near the first thermal composite roller to provide the first positive electrode to the first thermal composite roller; and / or, the thermal composite roller device further includes a second positive electrode conveyor near the second thermal composite roller to provide the second positive electrode to the second thermal composite roller.

[0017] In one embodiment, the thermal composite roller device includes a heating element configured to heat the first thermal composite roller and / or the second thermal composite roller. The first thermal composite roller is provided with a temperature sensor, which is adapted to be electrically connected to a controller so that the controller controls the heating element to heat or not heat the first thermal composite roller based on the temperature signal from the temperature sensor. And / or, the second thermal composite roller is provided with a temperature sensor, which is adapted to be electrically connected to the controller so that the controller controls the heating element to heat or not heat the second thermal composite roller based on the temperature signal from the temperature sensor.

[0018] Secondly, embodiments of this utility model provide a thermal lamination device, which includes the aforementioned thermal lamination roller device.

[0019] The beneficial effects of the embodiments of this utility model are as follows:

[0020] In the embodiments of this utility model, since the first thermal composite roller and the second thermal composite roller are spaced apart along the length direction of the thermal composite electrode assembly, the first thermal composite roller that provides rolling pressure to the first side of the thermal composite electrode assembly unit and the second thermal composite roller that provides rolling pressure to the second side of the thermal composite electrode assembly unit are staggered. The first side and the second side of the thermal composite electrode assembly unit will not be simultaneously subjected to the downward pressure of the first thermal composite roller and the upward pressure of the second thermal composite roller, thereby effectively improving the edge warping or sheet drop caused by the first side and the second side of the thermal composite electrode assembly unit being simultaneously subjected to the downward pressure of the first thermal composite roller and the upward pressure of the second thermal composite roller. Attached Figure Description

[0021] 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.

[0022] Figure 1 This is a schematic diagram of the working process of the thermal composite roller device provided in an embodiment of this utility model;

[0023] Figure 2 This is a three-dimensional schematic diagram of the thermal composite electrode assembly provided in an embodiment of the present invention;

[0024] Figure 3 This is a cross-sectional structural diagram of the thermal composite electrode assembly provided in an embodiment of this utility model;

[0025] Figure 4 This is an exploded view of the thermal composite electrode assembly provided in an embodiment of this utility model;

[0026] Figure 5 This is a perspective view of the thermal composite roller device provided in an embodiment of the present invention;

[0027] Figure 6 This is another perspective view of the thermal composite roller device provided in the embodiment of this utility model;

[0028] Icon labels:

[0029] 100. Thermal composite roller device;

[0030] 1. First thermal composite roller assembly; 11. First thermal composite roller; 12. First auxiliary thermal composite roller;

[0031] 2. Second thermal composite roller assembly; 21. Second thermal composite roller; 22. Second auxiliary thermal composite roller;

[0032] 20. Thermal composite electrode assembly;

[0033] 3. Thermally composite electrode assembly unit; 301, first side surface; 302, second side surface; 31, first thermally composite electrode assembly unit; 311, first positive electrode; 312, first separator; 313, first negative electrode; 314, second separator; 32, second thermally composite electrode assembly unit; 321, second negative electrode; 322, second positive electrode;

[0034] 41. First driving component; 42. Second driving component;

[0035] 51. First inspection piece; 52. Second inspection piece;

[0036] 61. First positive electrode plate conveyor; 62. Second positive electrode plate conveyor;

[0037] 91. First positive electrode plate feeding component; 92. Second positive electrode plate feeding component; Detailed Implementation

[0038] 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 skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0039] The battery electrode thermal bonding process uses a thermal bonding roller assembly to bond the positive electrode, separator, and negative electrode together to form a thermally bonded electrode assembly. In related technologies, the thermal bonding roller assembly includes an upper thermal bonding roller and a lower thermal bonding roller. The electrode assembly to be bonded is sandwiched between the upper and lower thermal bonding rollers. The upper and lower thermal bonding rollers respectively provide upper and lower rolling pressure forces to the electrode assembly to be bonded. When the upper and lower thermal bonding rollers simultaneously apply rolling pressure to each electrode unit of the electrode assembly, the upper and lower rolling pressure forces provided by the upper and lower thermal bonding rollers are difficult to keep consistent, which can lead to electrode warping or detachment during the thermal bonding process.

[0040] like Figures 2 to 4As shown, the thermally composite electrode assembly 20 includes multiple consecutive thermally composite electrode group units 3. Each thermally composite electrode group unit 3 includes a positive electrode, a negative electrode, and two separators for separating the positive and negative electrode. In a specific embodiment, the multiple consecutive thermally composite electrode group units 3 include adjacent first thermally composite electrode group units 31 and second thermally composite electrode group units 32. The first thermally composite electrode group unit 31 includes a first positive electrode 311, a first separator 312, a first negative electrode 313, and a second separator 314 sequentially stacked along the stacking direction of the thermally composite electrode assembly, as shown in the figure. Figure 3 In the x-direction shown, the second thermally composite electrode assembly unit 32 includes a first separator 312, a second negative electrode 321, a second separator 314, and a second positive electrode 322, which are sequentially stacked along the stacking direction of the thermally composite electrode assembly. The first separator 312 and the second separator 314 are configured as continuous strips, while the first positive electrode 311, the second positive electrode 322, the first negative electrode 313, and the second negative electrode 321 are all configured as sheets.

[0041] Two adjacent first thermally bonded electrode assembly units 31 and second thermally bonded electrode assembly units 32 are connected by a first separator 312 and a second separator 314. The thermally bonded electrode assembly 20 includes a first side surface 301 and a second side surface 302 facing each other along the stacking direction of the thermally bonded electrode assembly units 3. A plurality of first positive electrode sheets 311 are disposed on the first separator 312, thus the first side surface 301 is configured to be defined by the portion of the first separator 312 not covered by the first positive electrode sheets 311 and the plurality of first positive electrode sheets 311. A plurality of second positive electrode sheets 322 are disposed below the second separator 314, thus the second side surface 302 is configured to be defined by the portion of the second separator 314 not covered by the second positive electrode sheets 322 and the plurality of second positive electrode sheets 322.

[0042] One embodiment of this application provides a thermal composite roller device 100, such as... Figure 1 , Figures 4 to 6 As shown, the thermal composite roller device 100 includes a thermal composite roller assembly, a mounting bracket 7, and a drive component 4.

[0043] The thermal bonding roller assembly includes a first thermal bonding roller 11 and a second thermal bonding roller 21. The first thermal bonding roller 11 is located on one side of the first side surface 301 of the thermal bonding electrode assembly 20, and is configured to provide a rolling force to the first side surface 301 of the thermal bonding electrode group unit 3. The second thermal bonding roller 21 is located on one side of the second side surface 302 of the thermal bonding electrode group unit 3, and is configured to provide a rolling force to the second side surface 302 of the thermal bonding electrode assembly 20. The first thermal bonding roller 11 and the second thermal bonding roller 21 are spaced apart along the length direction of the thermal bonding electrode assembly 20, as shown in the figure below. Figure 3 Y direction shown.

[0044] Since the first thermal composite roller 11 and the second thermal composite roller 21 are spaced apart along the length of the thermal composite electrode assembly 20, the first thermal composite roller 11, which provides rolling pressure to the first side 301 of the thermal composite electrode assembly unit 3, and the second thermal composite roller 21, which provides rolling pressure to the second side 302 of the thermal composite electrode assembly unit 3, are staggered. The first side 301 and the second side 302 of the thermal composite electrode assembly unit 3 will not be simultaneously subjected to the downward pressure of the first thermal composite roller 11 and the upward pressure of the second thermal composite roller 21. This effectively improves the edge warping or sheet drop caused by the first side 301 and the second side 302 of the thermal composite electrode assembly unit 3 being simultaneously subjected to the downward pressure of the first thermal composite roller 11 and the upward pressure of the second thermal composite roller 21.

[0045] In some embodiments, the thermal composite roller assembly includes a first thermal composite roller assembly 1 and a second thermal composite roller assembly 2 arranged side by side along the length direction of the thermal composite electrode assembly 20.

[0046] The first thermal bonding roller assembly 1 includes a first thermal bonding roller 11 and a first auxiliary thermal bonding roller 12 arranged opposite to each other along the stacking direction of the thermal bonding electrode assembly. The first thermal bonding roller 11 is located on one side of the first side surface 301 of the thermal bonding electrode group unit 3, and the first auxiliary thermal bonding roller 12 is located on one side of the second side surface 302 of the same thermal bonding electrode group unit 3. The first thermal bonding roller 11 is configured to roll the first side surface 301 of the thermal bonding electrode group unit 3, and the first auxiliary thermal bonding roller 12 is configured to provide a fixing function for the second side surface 302 of the same thermal bonding electrode group unit 3. The first thermal bonding roller 11 can move relative to the first auxiliary thermal bonding roller 12 along the stacking direction of the thermal bonding electrode group unit 3 to roll the first side surface 301 of the thermal bonding electrode group unit 3.

[0047] The second thermal bonding roller assembly 2 includes a second thermal bonding roller 21 and a second auxiliary thermal bonding roller 22 disposed opposite to each other along the stacking direction of the thermal bonding electrode assembly. The second thermal bonding roller 21 is located on one side of the second side surface 302 of the thermal bonding electrode assembly unit 3, and the second auxiliary thermal bonding roller 22 is located on one side of the first side surface 301 of the same thermal bonding electrode assembly unit 3. The second thermal bonding roller 21 is configured to roll the second side surface 302 of the thermal bonding electrode assembly unit 3, and the second auxiliary thermal bonding roller 22 is configured to provide a fixing function to the first side surface 301 of the same thermal bonding electrode assembly unit 3. The second thermal bonding roller 21 can move relative to the second auxiliary thermal bonding roller 22 along the stacking direction of the thermal bonding electrode assembly unit 3 to roll the second side surface 302 of the thermal bonding electrode assembly unit 3.

[0048] Continue to refer to Figure 5The mounting bracket 7 includes two brackets, one for fixing the first thermally composited roller assembly 1 and the other for fixing the second thermally composited roller assembly 2. The two mounting brackets 7 are spaced apart along the length of the thermally composited electrode assembly 20. Each mounting bracket 7 has a receiving cavity. The first thermally composited roller 11 and the first auxiliary thermally composited roller 12 are mounted opposite each other in the receiving cavity of the mounting bracket 7 along the stacking direction of the thermally composited electrode assembly 20, with the thermally composited electrode assembly 20 sandwiched between the first thermally composited roller 11 and the first auxiliary thermally composited roller 12. The second thermally composited roller 21 and the second auxiliary thermally composited roller 22 are mounted opposite each other in the receiving cavity of the mounting bracket 7 along the stacking direction of the thermally composited electrode assembly 20, with the thermally composited electrode assembly 20 sandwiched between the second thermally composited roller 21 and the second auxiliary thermally composited roller 22.

[0049] In some embodiments, the distance between the first thermal bonding roller 11 and the second thermal bonding roller 21 along the length direction of the thermal bonding electrode assembly 20 is greater than or equal to the length L of a single thermal bonding electrode group unit 3. In a specific embodiment, the distance between the first thermal bonding roller 11 and the second thermal bonding roller 21 along the length direction of the thermal bonding electrode assembly 20 is equal to the length of a single thermal bonding electrode group unit 3, such that when the first thermal bonding roller 11 acts on the first thermal bonding electrode group unit 31, the second thermal bonding roller 21 acts on the second thermal bonding electrode group unit 32. When the first thermal bonding roller 11 rolls the first positive electrode 311 on the first side surface 301 of the first thermal bonding electrode group unit 31, the second thermal bonding roller 21 rolls the second positive electrode 322 on the second side surface 302 of the second thermal bonding electrode group unit 32, so as to maintain continuous thermal bonding of the thermal bonding electrode assembly 20 to be bonded.

[0050] In some embodiments, such as Figure 4 and Figure 5 As shown, the plurality of thermally composite electrode assembly units 3 include adjacent first thermally composite electrode assembly units 31 and second thermally composite electrode assembly units 32. The first thermally composite roller 11 is used to roll the first side surface 301 of the first thermally composite electrode assembly unit 31 and the first side surface 301 of the second thermally composite electrode assembly unit 32. The second thermally composite roller 21 is used to roll the second side surface 302 of the first thermally composite electrode assembly unit 3 and the first side surface 301 of the second thermally composite electrode assembly unit 32.

[0051] The first thermally composite electrode assembly unit 31 comprises, along its stacking direction, a first positive electrode 311, a first separator 312, a first negative electrode 313, and a second separator 314 stacked sequentially. The second thermally composite electrode assembly unit 32 comprises, along its stacking direction, a first separator 312, a second negative electrode 321, a second separator 314, and a second positive electrode 322 stacked sequentially. The first separator 312 of the first thermally composite electrode assembly unit 31 and the first separator 312 of the second thermally composite electrode assembly unit 32 are interconnected, and the second separator 314 of the first thermally composite electrode assembly unit 31 and the second separator 314 of the second thermally composite electrode assembly unit 32 are interconnected to facilitate continuous thermal composite. When the first thermally composite roller assembly 1 acts on the first thermally composite electrode assembly unit 31, the second thermally composite roller assembly 2 acts on its adjacent second thermally composite electrode assembly unit 32. Specifically, when the first thermal bonding roller 11 rolls the first side surface 301 of the first thermal bonding electrode assembly unit 31, the second thermal bonding roller 21 rolls the second side surface 302 of the adjacent second thermal bonding electrode assembly unit 32 to form continuous thermal bonding. Along the moving direction of the thermal bonding electrode assembly 20, the first thermal bonding roller assembly 1 is positioned before the first thermal bonding roller assembly 21. The first side surface 301 of the same thermal bonding electrode assembly unit 3 is first subjected to the downward rolling action of the first thermal bonding roller 11, and the second side surface 302 of the same thermal bonding electrode assembly unit 3 is then subjected to the upward rolling action of the second thermal bonding roller 21, so that the first side surface 301 and the second side surface 302 of the same thermal bonding electrode assembly unit 3 are not simultaneously subjected to the downward rolling action of the first thermal bonding roller 11 and the upward rolling action of the second thermal bonding roller 21.

[0052] In some embodiments, along the length direction of the thermally composite electrode assembly 20, the first side surface 301 of the thermally composite electrode assembly 20 is sequentially configured as a continuous combination of the first positive electrode 311 and the first separator 312, and the second side surface 302 of the thermally composite electrode assembly 20 is sequentially configured as a continuous combination of the second separator 314 and the second positive electrode 322.

[0053] The first thermal bonding roller 11 is mainly used for rolling the first positive electrode 311, and the second thermal bonding roller 21 is mainly used for rolling the second positive electrode 322. However, the first thermal bonding roller 11 applying equal force to the first separator 312 causes adhesive to adhere to the surface of the first separator 312, thus affecting its rolling effect on the subsequent first positive electrode 311. Similarly, the second thermal bonding roller 21 applying equal force to the second separator 314 causes adhesive to adhere to the surface of the second separator 314, thus affecting its rolling effect on the subsequent second positive electrode 322.

[0054] In a specific embodiment provided in this application, a first thermal composite roller 11 is configured to contact and roll the first positive electrode 311 of the first side surface 301 of the first thermal composite electrode assembly unit 31 and the first diaphragm 312 of the first side surface 301 of the second thermal composite electrode assembly unit 32. The rolling force of the first thermal composite roller 11 on the first positive electrode 311 of the first thermal composite electrode assembly unit 31 is F1, and the rolling force of the first thermal composite roller 11 on the first diaphragm 312 of the second thermal composite electrode assembly unit 32 is F2, wherein F1 is greater than F2. By reducing the rolling force of the first thermal composite roller 11 on the first diaphragm 312, the problem of roller sticking caused by the first thermal composite roller 11 rolling the first diaphragm 312 is improved. The second thermal composite roller 21 is configured to contact and roll the second diaphragm 314 and the second positive electrode 322 of the second side surface 302 of the second thermal composite electrode assembly unit 32. The rolling force of the second thermal composite roller 21 on the second positive electrode 322 of the second thermal composite electrode assembly unit 32 is F3, and the rolling force of the second thermal composite roller 21 on the second diaphragm 314 of the first thermal composite electrode assembly unit 31 is F4, where F3 is greater than F4. By reducing the rolling force of the second thermal composite roller 21 on the second diaphragm 314, the problem of roller sticking caused by the second thermal composite roller 21 rolling the second diaphragm 314 is improved.

[0055] In some embodiments, the thermal bonding roller device 100 further includes a first driving member 41 and a second driving member 42. The first driving member 41 is connected to the first thermal bonding roller 11 and drives the first thermal bonding roller 11 to move toward or away from the thermal bonding electrode assembly unit 3. The second driving member 42 is connected to the second thermal bonding roller 21 and drives the second thermal bonding roller 21 to move toward or away from the thermal bonding electrode assembly unit 3. The first driving member 41 is mounted on the top end of the mounting bracket 7, and the second driving member 42 is mounted on the bottom end of the mounting bracket 7.

[0056] In one specific implementation, the thermal composite roller device 100 further includes a first monitoring element 51 and a second monitoring element 52, both of which include cameras. The first monitoring element 51 is located near the first thermal composite roller 11 and is electrically connected to the first driving element 41. When the first monitoring element 51 detects that the first positive electrode 311 of the first thermal composite electrode assembly unit 31 is located below the first thermal composite roller 11, the first driving element 41 drives the first thermal composite roller 11 to move toward the first positive electrode 311 to roll the first side surface 301 of the first thermal composite electrode assembly unit 31. When the first monitoring element 51 detects that the first diaphragm 312 of the second thermally bonded electrode assembly 32 is below the first thermally bonded roller 11, the first driving element 41 drives the first thermally bonded roller 11 to move away from the first diaphragm 312 to reduce or eliminate the rolling pressure of the first thermally bonded roller 11 on the first diaphragm 312, thereby effectively improving the adhesion of the adhesive on the first diaphragm 312 to the first thermally bonded roller 11 and its impact on the performance of the thermally bonded electrode assembly 20. The second monitoring element 52 is close to the second thermally bonded roller 21 and is electrically connected to the second driving element 42. When the second monitoring element 52 detects that the second positive electrode 322 of the second thermally bonded electrode assembly 32 is above the second thermally bonded roller 21, the second driving element 42 drives the second thermally bonded roller 21 to move towards the second positive electrode 322 to roll the second side surface 302 of the second thermally bonded electrode assembly 32. When the second monitoring element 52 detects that the second diaphragm 314 of the first thermally composite electrode assembly unit 32 is located above the second thermally composite roller 21, the second driving element 42 drives the second thermally composite roller 21 to move away from the second diaphragm 314 to reduce or eliminate the rolling pressure of the second thermally composite roller 21 on the second diaphragm 314, thereby effectively improving the adhesion of the adhesive on the second diaphragm 314 to the second thermally composite roller 21 and affecting the performance of the thermally composite electrode assembly 20.

[0057] Understandably, during the thermal bonding process of the thermally bonded electrode assembly 20, at least one of the first thermal bonding roller 11 and the second thermal bonding roller 21 rolls the thermally bonded electrode assembly 20, thereby effectively improving the problem of vibration of the overall material line of the thermally bonded electrode assembly 20 during the bonding process.

[0058] The thermal bonding roller device 100 also includes a first positive electrode sheet feeding component 91, a first positive electrode sheet conveying component 61, a second positive electrode sheet feeding component 92, and a second positive electrode sheet conveying component 62. Both the first positive electrode sheet feeding component 61 and the second positive electrode sheet conveying component 62 include a drive belt. The first positive electrode sheet feeding component 91 provides multiple cut first positive electrode sheets 311 to the first positive electrode sheet conveying component 61. The first positive electrode sheet conveying component 61 is located close to the first thermal bonding roller 11. The first positive electrode sheet conveying component 61 provides multiple cut first positive electrode sheets 311 to the first thermal bonding roller 11 for thermal bonding and prevents multiple first positive electrode sheets 311 from falling off before thermal bonding. The second positive electrode feeding component 92 provides the cut second positive electrode sheets 322 to the first positive electrode conveying component 61. The second positive electrode conveying component 62 is located close to the second thermal bonding roller 21. The second positive electrode conveying component 62 provides the cut second positive electrode sheets 322 to the second thermal bonding roller 21 for thermal bonding and prevents the multiple second positive electrode sheets 322 from falling off before thermal bonding.

[0059] The thermal bonding roller device 100 further includes a heating element, a temperature sensor, and a controller. The heating element is configured to heat the first thermal bonding roller and / or the second thermal bonding roller to provide the temperature required for thermal bonding. In a specific implementation, the heating element includes a thermocouple disposed on the thermal bonding roller. Temperature sensors are also provided on the surfaces of the first thermal bonding roller 11 and the second thermal bonding roller 21. The temperature sensors are used to detect the surface temperature of the first thermal bonding roller 11 and / or the second thermal bonding roller 21. The temperature sensors are electrically connected to the controller, which controls the heating element to heat or not heat the corresponding first or second thermal bonding roller based on the temperature signal from the temperature sensors.

[0060] The embodiments of this application also provide a thermal bonding device, which includes the thermal bonding roller device and the thermal bonding stacking device provided in the above embodiments. The thermal bonding roller device is configured to roll and bond the positive electrode sheet, the separator and the negative electrode sheet together by the first thermal bonding roller and the second bonding roller to form a plurality of thermally bonded electrodes. The thermal bonding stacking device is configured to stack a plurality of thermally bonded electrodes to form a core package.

[0061] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A thermal compounding roller device, characterized by, The application relates to a hot-pressing roller assembly and a hot-pressing pole piece assembly. The hot-pressing roller assembly comprises a first hot-pressing roller and a second hot-pressing roller. The hot-pressing pole piece assembly comprises a plurality of hot-pressing pole piece assembly units, each of which comprises a first side and a second side opposite to each other along a stacking direction of the hot-pressing pole piece assembly unit. The first hot-pressing roller and the second hot-pressing roller are arranged opposite to each other along a length direction of the hot-pressing pole piece assembly, and the first hot-pressing roller is arranged to roll-press the first side of the hot-pressing pole piece assembly unit, and the second hot-pressing roller is arranged to roll-press the second side of the hot-pressing pole piece assembly unit.

2. The thermal compounding roller apparatus according to claim 1, wherein The hot-pressing roller assembly comprises a first auxiliary hot-pressing roller, the first hot-pressing roller and the first auxiliary hot-pressing roller are arranged opposite to each other along the stacking direction of the hot-pressing pole piece assembly unit, and the first hot-pressing roller moves relative to the first auxiliary hot-pressing roller along the stacking direction of the hot-pressing pole piece assembly unit to roll-press the first side of the hot-pressing pole piece assembly unit. The hot-pressing roller assembly comprises a second auxiliary hot-pressing roller, the second hot-pressing roller and the second auxiliary hot-pressing roller are arranged opposite to each other along the stacking direction of the hot-pressing pole piece assembly, and the second hot-pressing roller moves relative to the second auxiliary hot-pressing roller along the stacking direction of the hot-pressing pole piece assembly to roll-press the second side of the hot-pressing pole piece assembly unit.

3. The thermal compounding roller apparatus of claim 1, wherein, The interval distance of the first hot-pressing roller and the second hot-pressing roller along the length direction of the hot-pressing pole piece assembly is greater than or equal to the length of the single hot-pressing pole piece assembly unit.

4. The thermal compounding roller apparatus of claim 1, wherein, The plurality of hot-pressing pole piece assembly units comprises a first hot-pressing pole piece assembly unit and a second hot-pressing pole piece assembly unit adjacent to each other, the first hot-pressing roller is suitable for roll-pressing the first hot-pressing pole piece assembly unit and the second hot-pressing pole piece assembly unit, and the second hot-pressing roller is suitable for roll-pressing the first hot-pressing pole piece assembly unit and the second hot-pressing pole piece assembly unit; wherein the first hot-pressing pole piece assembly unit comprises a first positive pole piece, a first separator, a first negative pole piece and a second separator which are sequentially stacked, the second hot-pressing pole piece assembly unit comprises a first separator, a second negative pole piece, a second separator and a second positive pole piece which are sequentially stacked, the first separators of the first hot-pressing pole piece assembly unit and the second hot-pressing pole piece assembly unit are connected to each other, and the second separators of the first hot-pressing pole piece assembly unit and the second hot-pressing pole piece assembly unit are connected to each other.

5. The thermal lamination roll apparatus of claim 4, wherein, The first hot-pressing roller provides a roll-pressing force F1 to the first positive pole piece of the first hot-pressing pole piece assembly unit, and provides a roll-pressing force F2 to the first separator of the second hot-pressing pole piece assembly unit, wherein F1 is greater than F2; and / or the second hot-pressing roller provides a roll-pressing force F3 to the second positive pole piece of the second hot-pressing pole piece assembly unit, and provides a roll-pressing force F4 to the second separator of the first hot-pressing pole piece assembly unit, wherein F3 is greater than F4.

6. The thermal compounding roller apparatus of claim 4, wherein, The hot-combining roller device further comprises a first driving member connected to the first hot-combining roller and used to drive the first hot-combining roller to move towards or away from the hot-combining pole piece group unit; and / or, the hot-combining roller device further comprises a second driving member connected to the second hot-combining roller and used to drive the second hot-combining roller to move towards or away from the hot-combining pole piece group unit.

7. The thermal compounding roller apparatus of claim 6, wherein The hot-combining roller device further comprises a first monitoring member electrically connected to the first driving member, when the first monitoring member monitors the first positive pole piece, the first driving member drives the first hot-combining roller to move towards the first positive pole piece, when the first monitoring member monitors the first diaphragm, the first driving member drives the first hot-combining roller to move away from the first diaphragm; and / or, The hot-combining roller device further comprises a second monitoring member electrically connected to the second driving member, when the second monitoring member monitors the second positive pole piece, the second driving member drives the second hot-combining roller to move towards the second positive pole piece, when the second monitoring member monitors the second diaphragm, the second driving member drives the second hot-combining roller to move away from the second diaphragm. The hot-combining roller device comprises a first positive pole piece conveying member close to the first hot-combining roller to provide the first positive pole piece to the first hot-combining roller; and / or, the hot-combining roller device further comprises a second positive pole piece conveying member close to the second hot-combining roller to provide the second positive pole piece to the second hot-combining roller.

8. The thermal compounding roller apparatus of claim 4, wherein, The hot-combining roller device comprises a heating member arranged to heat the first hot-combining roller and / or the second hot-combining roller, the first hot-combining roller is provided with a temperature sensor adapted to be electrically connected to a controller to make the controller control the heating member to heat or not to heat the first hot-combining roller according to a temperature signal of the temperature sensor; and / or, the second hot-combining roller is provided with a temperature sensor adapted to be electrically connected to a controller to make the controller control the heating member to heat or not to heat the second hot-combining roller according to a temperature signal of the temperature sensor.

9. The thermal compounding roller apparatus of claim 1, wherein, The hot-combining roller device comprises a heating member arranged to heat the first hot-combining roller and / or the second hot-combining roller, the first hot-combining roller is provided with a temperature sensor adapted to be electrically connected to a controller to make the controller control the heating member to heat or not to heat the first hot-combining roller according to a temperature signal of the temperature sensor; and / or, the second hot-combining roller is provided with a temperature sensor adapted to be electrically connected to a controller to make the controller control the heating member to heat or not to heat the second hot-combining roller according to a temperature signal of the temperature sensor.

10. A thermal compounding apparatus characterized by comprising: The hot-combining roller device comprises a heating member arranged to heat the first hot-combining roller and / or the second hot-combining roller, the first hot-combining roller is provided with a temperature sensor adapted to be electrically connected to a controller to make the controller control the heating member to heat or not to heat the first hot-combining roller according to a temperature signal of the temperature sensor; and / or, the second hot-combining roller is provided with a temperature sensor adapted to be electrically connected to a controller to make the controller control the heating member to heat or not to heat the second hot-combining roller according to a temperature signal of the temperature sensor.

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