Pole piece thermal compounding device and thermal compounding equipment

Abstract

The utility model provides a pole piece thermal compounding device and thermal compounding equipment, and the pole piece thermal compounding device comprises at least one pole piece preheating assembly which is suitable for heating a pole piece; the thermal compounding roller assembly comprises at least one thermal compounding roller; and the temperature adjusting assembly is suitable for adjusting the temperature of the at least one thermal compounding roller.

Description

Technical Field

[0001] This utility model relates to the field of battery thermal bonding technology, specifically to an electrode thermal bonding device and thermal bonding equipment. Background Technology

[0002] In related technologies, the electrode thermal bonding process involves combining an upper positive electrode, a first separator, a negative electrode, a second separator, and a lower positive electrode into a thermally bonded electrode assembly via thermal bonding roller pressing. The upper thermal bonding roller is used to press the upper positive electrode, and the lower thermal bonding roller is used to press the lower positive electrode. A positive electrode preheating mechanism is installed before the thermal bonding roller assembly to preheat the positive electrode. If the temperature of the positive electrode is too high, it will cause the temperature of the thermal bonding roller in contact with the positive electrode to become too high, leading to roller sticking upon contact with the separator, thus affecting the subsequent thermal bonding effect. Utility Model Content

[0003] The present invention provides an electrode thermal bonding device and thermal bonding equipment, which can improve the technical problem of excessively high surface temperature of thermal bonding rollers.

[0004] In a first aspect, embodiments of this utility model provide an electrode thermal recombination device, comprising:

[0005] At least one electrode preheating assembly is provided for heating the electrode.

[0006] A thermal composite roller assembly, comprising at least one thermal composite roller; and

[0007] A temperature control component, the temperature control component being adapted to adjust the temperature of the at least one thermal composite roller.

[0008] In one embodiment, the thermal composite roller assembly further includes a temperature sensor and a controller. The temperature sensor is configured to detect the temperature of the thermal composite roller and transmit it to the controller. The temperature regulating component is electrically connected to the controller, and the controller is configured to control the temperature regulating component to adjust the temperature of the at least one thermal composite roller according to the temperature detected by the temperature sensor.

[0009] In one embodiment, the preheating assembly includes a resistance temperature detector (RTD) heating assembly, which includes a first heating plate and a second heating plate. The electrode includes a first surface and a second surface facing each other. The first surface is configured to contact the thermal composite roller, and the second surface is configured to adhere to the diaphragm. The first heating plate is configured to heat the first surface, and the second heating plate is configured to heat the second surface.

[0010] In one embodiment, the temperature control component includes a drive mechanism connected to the first heating plate to control the first heating plate to move closer to or further away from the electrode.

[0011] In one embodiment, the driving mechanism includes a driving member and a sliding member, the first heating plate is mounted on the sliding member, the driving member is configured to drive the sliding member to slide so as to drive the first heating plate to slide, the driving member is electrically connected to the controller, and the controller is configured to control the opening or closing of the driving member according to the temperature detected by the temperature sensor.

[0012] In one embodiment, the second heating plate includes a first side and a second side, with an included angle between the first side and the second side, the included angle being less than or equal to 30°.

[0013] In one embodiment, the electrode preheating assembly includes an electromagnetic heating assembly, the preheating assembly includes a first heating plate and a second heating plate, and the electrode is located between the first heating plate and the second heating plate.

[0014] In one embodiment, the temperature control assembly further includes a cooling element located near the thermal composite roller and electrically connected to the controller, which is configured to control the opening or closing of the cooling element based on the temperature detected by the temperature sensor.

[0015] In one embodiment, the electrode preheating assembly is provided with a motion sensor, which is electrically connected to the controller. The motion sensor is configured to detect the movement of the electrode and transmit the motion information to the controller. The controller is configured to be electrically connected to the preheating assembly and control the opening of the electrode preheating assembly based on the movement of the electrode detected by the motion sensor.

[0016] In one embodiment, the electrode preheating assembly includes a first preheating assembly and a second preheating assembly, the electrode includes a first positive electrode and a second positive electrode, the first preheating assembly is configured to heat the first positive electrode, the second preheating assembly is configured to heat the second positive electrode, and the first preheating assembly and the second preheating assembly are spaced apart and configured to work alternately.

[0017] Secondly, embodiments of this utility model provide a thermal bonding device, which includes the aforementioned electrode thermal bonding apparatus and a stacking apparatus. The thermal bonding apparatus is configured to process and form a thermally bonded electrode assembly, and the stacking apparatus is configured to stack the thermally bonded electrode assembly.

[0018] The beneficial effects of the embodiments of this utility model are as follows:

[0019] In an embodiment of this utility model, a temperature regulating component is provided on the thermal lamination device. This component is configured to regulate the temperature of the thermal lamination roller so that the roller remains within a suitable temperature range, thereby improving the technical problem of the roller sticking to the diaphragm due to excessively high temperature. Attached Figure Description

[0020] 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.

[0021] Figure 1 This is a three-dimensional schematic diagram of a thermal composite device provided in one embodiment of the present invention;

[0022] Figure 2 This is a three-dimensional schematic diagram of a thermal composite device with a resistor preheating component provided in one embodiment of the present invention;

[0023] Figure 3 This is a magnified view of a portion of the image;

[0024] Figure 4 This is a three-dimensional schematic diagram of the first heating plate connecting sliding mechanism provided in an embodiment of the present invention;

[0025] Figure 5 This is a three-dimensional schematic diagram of a thermal composite device with an electromagnetic preheating component provided in one embodiment of the present invention;

[0026] Figure 6 This is a three-dimensional schematic diagram of the heating electrode of the electromagnetic preheating plate provided in one embodiment of the present invention;

[0027] Figure 7 This is a three-dimensional schematic diagram of a thermal composite device for an electromagnetic preheating plate heating electrode provided in one embodiment of the present invention;

[0028] 100. Thermal composite roller device;

[0029] 1. Electrode preheating assembly; 101. First preheating assembly; 102. Second preheating assembly; 11. First heating plate; 12. Second heating plate; 121. First side surface; 122. Second side surface; 13. Electromagnetic heating plate; 14. Coil; 15. Magnet; 16. Buffer angle;

[0030] 2. Thermal composite roller assembly; 21. First thermal composite roller; 22. Second thermal composite roller;

[0031] 3. Thermally composite electrode assembly; 311. First positive electrode; 312. Second positive electrode; 313. First surface; 314. Second surface; 32. Negative electrode; 33. First separator; 34. Second separator;

[0032] 4. Temperature sensor;

[0033] 5. Temperature control component; 51. Drive mechanism; 52. Sliding component; 53. Drive component; 54. Cooling component;

[0034] 6. Positive electrode driving roller;

[0035] 7. Motion sensor; Detailed Implementation

[0036] 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.

[0037] In related technologies, the electrode thermal bonding process involves combining an upper positive electrode, a first separator, a negative electrode, a second separator, and a lower positive electrode into a thermally bonded electrode assembly via thermal bonding roller pressing. The upper thermal bonding roller is used to press the upper positive electrode, and the lower thermal bonding roller is used to press the lower positive electrode. A positive electrode preheating mechanism is installed before the thermal bonding roller assembly to preheat the positive electrode. If the temperature of the positive electrode is too high, it will cause the temperature of the thermal bonding roller in contact with the positive electrode to become too high, leading to roller sticking upon contact with the separator, thus affecting the subsequent thermal bonding effect.

[0038] Embodiments of this application provide an electrode thermal recombination device, such as... Figure 1 As shown, the electrode thermal bonding device includes at least one electrode preheating component 1, a thermal bonding roller component 2, and a temperature regulating component 5.

[0039] At least one electrode preheating assembly 1 is adapted to heat the electrode. In some embodiments, the thermally composite electrode assembly 3 includes a plurality of thermally composite electrode group units connected along the length direction of the thermally composite electrode assembly. The plurality of thermally composite electrode group units include a plurality of adjacent first thermally composite electrode group units and second thermally composite electrode group units. The first thermally composite electrode group unit includes a first positive electrode 311, a first separator 33, a negative electrode 32 and a second separator 34 arranged sequentially along the stacking direction. The second thermally composite electrode group unit includes a first separator 33, a negative electrode 32, a second separator 34 and a second positive electrode 312 arranged sequentially along the stacking direction. The first positive electrode 311 is located above the first separator 33 and the second positive electrode 312 is located below the second separator 34.

[0040] At least one electrode preheating assembly 1 includes a first preheating assembly 101 and a second preheating assembly 102. The first preheating assembly 101 is configured to heat multiple first positive electrode sheets 311, and the second preheating assembly 102 is configured to heat multiple second positive electrode sheets 312. The first preheating assembly 101 and the second preheating assembly 102 are spaced apart on both sides of the thermally composited electrode assembly 3 and are configured to operate alternately. Specifically, after the first preheating assembly 101 provides the heated first positive electrode sheets 311 to the first separator 33 for thermally composited rolling, the second preheating assembly 102 then provides the heated second positive electrode sheets 312 to the second separator 34 for thermally composited rolling. By preheating the first positive electrode sheets 311 and the second positive electrode sheets 312, the preheated first positive electrode sheets 311 and the second positive electrode sheets 312 can be better thermally composited with the separator, and the phenomenon of sheet falling off and corner warping is less likely to occur. At the same time, the rolling force of the thermally composited roller can be reduced, thereby improving the air permeability of the separator.

[0041] The thermal bonding roller assembly 2 includes a first thermal bonding roller 21 and a second thermal bonding roller 22. The first thermal bonding roller 21 is disposed on one side of the thermal bonding electrode assembly 3, and the second thermal bonding roller 22 is disposed on the other side of the thermal bonding electrode assembly 3. Both the first positive electrode 311 and the second positive electrode 312 include opposing first surfaces 313 and second surfaces 314. The first surface 313 of the first positive electrode 311 is configured to contact the first thermal bonding roller 21, and the second surface 314 of the first positive electrode 311 is configured to adhere to the first separator 33. The first surface 313 of the second positive electrode 312 is configured to contact the second thermal bonding roller 22, and the second surface 314 of the second positive electrode 312 is configured to adhere to the second separator 34.

[0042] The temperature regulating component 5 is adapted to regulate the temperature of at least one hot-compositing roller. When the temperature of the hot-compositing roller is too high, the temperature regulating component 5 is configured to reduce the surface temperature of the hot-compositing roller, thereby ensuring that the surface of the hot-compositing roller has a suitable temperature range, which can be 25°C to 35°C. It is understood that when the surface temperature of the hot-compositing roller is high, when the hot-compositing roller contacts the diaphragm, the adhesive on the diaphragm surface will adhere to the roller, potentially causing the hot-compositing roller to contact the positive electrode sheet and cause the positive electrode sheet to detach, thus affecting the performance of the hot-compositing electrode assembly. In the embodiments of this application, the surface temperature of the hot-compositing roller is maintained within a suitable temperature range by setting the temperature regulating component 5 to regulate the surface temperature of the hot-compositing roller.

[0043] In some embodiments, continue to refer to Figure 1 and Figure 2 The thermal composite roller assembly 2 also includes a temperature sensor 4 and a controller (not shown in the figure). The temperature sensor 4 is disposed inside or on the surface of the thermal composite roller to detect the temperature of the thermal composite roller. The controller is electrically connected to the temperature sensor 4 and the temperature regulating component 5. The temperature sensor 4 transmits the detected temperature of the thermal composite roller to the controller, which is configured to control the temperature regulating component 5 to adjust the temperature of the thermal composite roller according to the temperature detected by the temperature sensor 4. By setting the temperature sensor 4 and the controller, the temperature regulating component 5 can accurately adjust the temperature of the thermal composite roller according to the real-time temperature of the thermal composite roller.

[0044] In one specific embodiment provided in this application, such as Figures 1 to 4 As shown, the electrode preheating assembly 1 is configured as a resistance temperature detector (RTD) heating assembly for heating the first positive electrode 311 and the second positive electrode 312. The electrode preheating assembly 1 includes a first heating plate 11 and a second heating plate 12. The first positive electrode 311 or the second positive electrode 312 is located between the first heating plate 11 and the second heating plate 12. The first heating plate 11 is configured to heat the first surface 313 of the first positive electrode 311 or the second positive electrode 312, and the second heating plate 12 is configured to heat the second surface 314 of the first positive electrode 311 or the second positive electrode 312. By configuring the first heating plate 11 and the second heating plate 12 as the two sides corresponding to the first positive electrode 311 or the second positive electrode 312, the preheating efficiency of the electrode preheating assembly 1 for the first positive electrode 311 or the second positive electrode 312 is improved.

[0045] like Figure 4As shown, the temperature control assembly 5 includes a drive mechanism 51 connected to the first heating plate 11 to control the first heating plate 11 to move closer to or further away from the first positive electrode 311 or the second positive electrode 312. Understandably, when the temperature sensor 4 detects a high surface temperature of the first thermal composite roller 21, the drive mechanism 51 is configured to drive the first heating plate 11 away from the first positive electrode 311, thereby reducing the temperature of the first surface 313 of the first positive electrode 311, and consequently lowering the surface temperature of the first thermal composite roller 21 in contact with the first positive electrode 311. Similarly, when the temperature sensor 4 detects a high surface temperature of the second thermal composite roller 22, the drive mechanism 51 is configured to drive the first heating plate 11 away from the second positive electrode 312, thereby reducing the temperature of the first surface 313 of the second positive electrode 312, and consequently lowering the surface temperature of the second thermal composite roller 22 in contact with the second positive electrode 312. When the temperature sensor 4 detects that the surface temperature of the first thermal composite roller 21 or the second thermal composite roller 22 is within a suitable temperature range, the drive mechanism 51 is in a non-operating state.

[0046] The aforementioned driving mechanism 51 is configured as a sliding mechanism, comprising a sliding member 52 and a driving member 53. The first heating plate 11 is mounted on the sliding member 52, and the driving member 53 is configured to drive the sliding member 52 to slide, thereby moving the first heating plate 11 closer to or away from the first positive electrode 311 and the second positive electrode 312. The driving member 53 is electrically connected to a controller. In a specific implementation, the driving member 53 is configured as a telescopic cylinder, the sliding member 52 can be a telescopic rod, and the first heating plate 11 is connected to the sliding member 52. When the temperature sensor 4 detects that the temperature of the thermal composite roller is high, the controller controls the driving member 53 to open, and the driving member 53 drives the sliding member 52, causing the first heating plate 11 to retract away from the electrode. When the temperature sensor 4 detects that the temperature of the thermal composite roller is within the normal temperature range, the driving member 53 remains closed. Understandably, the thermal bonding roller itself does not have a heating structure. The temperature of the thermal bonding roller mainly comes from contact with the first positive electrode 311 or the second positive electrode 312. When the first heating plate 11 is facing the first positive electrode 311 or the second positive electrode 312, the first surface 313 of the first positive electrode 311 or the second positive electrode 312 is heated, thus maintaining a high temperature of the first surface 313 of the first positive electrode 311 or the second positive electrode 312 and transferring it to the thermal bonding roller. When the first heating plate 11 retracts, it moves away from the first positive electrode 311 or the second positive electrode 312, causing the first surface 313 of the first positive electrode 311 or the second positive electrode 312 to gradually cool down, and thus the surface of the thermal bonding roller gradually cools down, thereby reducing the surface temperature of the thermal bonding roller.

[0047] In some embodiments, such as Figure 2 and Figure 3As shown, the second heating plate 12 includes a first side surface 121 and a second side surface 122, with an included angle 16 between the first side surface 121 and the second side surface 122. This included angle 16 is located at the end of the second heating plate 12. This included angle 16 can lengthen the second heating plate 12 to form a larger heat-conducting surface between the second heating plate 12 and the first positive electrode 311 or the second positive electrode 312, while providing a buffer angle for the first positive electrode 311 to adhere to the first diaphragm 33, and for the second positive electrode 312 to adhere to the second diaphragm 34. Depending on the different installation conditions, this included angle 16 is set to be less than or equal to 30°.

[0048] In another embodiment provided in this application, such as Figures 5 to 7 As shown, the electrode preheating assembly 1 includes an electromagnetic heating assembly, which includes a first heating plate 11 and a second heating plate 12. The first positive electrode 311 or the second positive electrode 312 is located between the first heating plate 11 and the second heating plate 12. Specifically, both the first heating plate 11 and the second heating plate 12 include a substrate 13, a coil 14, and a magnet 15. The coil 14 and the magnet 15 are both fixed on the substrate 13. The magnet 15 is used to enhance the magnetic field strength. When the coil 14 is connected to alternating current, according to Ampere's law, an alternating magnetic field is generated around the coil 14. The first positive electrode 311 or the second positive electrode 312, as a conductor, is in the alternating magnetic field and will generate an induced current and Joule heat to heat the first positive electrode 311 or the second positive electrode 312 itself. Understandably, the first positive electrode 311 or the second positive electrode 312 is located between the first heating plate 11 and the second heating plate 12, forming a stable induced magnetic field between them. When one of the heating plates 11 moves, it will affect the generation of the induced magnetic field. Therefore, for the electromagnetic heating assembly, setting the temperature control component 5 as a heating plate driving mechanism will cause the electrode preheating component 1 to malfunction.

[0049] In some embodiments of this application, the temperature control component used in conjunction with the electromagnetic preheating component includes a cooling element 54. The cooling element 54 is located near the heat-compositing roller and is electrically connected to a controller. The controller is configured to control the opening or closing of the cooling element 54 based on the temperature detected by the temperature sensor 4. In a specific implementation, the cooling element 54 may be a cooling pipe containing a cooling medium, including cold air or coolant. The cooling element 54 has multiple ventilation holes positioned directly opposite the heat-compositing roller. When the cooling element 54 is in the open state, cold air is blown onto the heat-compositing roller to cool it.

[0050] In some embodiments, such as Figure 2 and Figure 5As shown, the electrode preheating assembly 1 is also equipped with a motion sensor 7, which is electrically connected to the controller. The motion sensor 7 is located between the positive electrode drive roller 6 and the electrode preheating assembly 1. When the motion sensor 7 detects the movement of the positive electrode, it transmits the sensed motion information to the controller. The controller is electrically connected to the electrode preheating assembly 1, and controls the opening of the electrode preheating assembly 1 based on the motion signal of the electrode sensed by the motion sensor 7. By setting the motion sensor 7, the opening of the electrode preheating assembly 1 can be controlled according to the movement state of the positive electrode.

[0051] The embodiments of this application also provide an electrode thermal bonding device, which includes the electrode thermal bonding apparatus and the stacking apparatus provided in the above embodiments. The electrode thermal bonding apparatus is configured to process and form thermally bonded electrode assemblies, and the stacking apparatus is configured to stack the thermally bonded electrode assemblies to form multiple core packages.

[0052] 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. An electrode thermal composite device, characterized in that, include: At least one electrode preheating assembly is provided for heating the electrode. A thermal composite roller assembly, comprising at least one thermal composite roller; as well as A temperature control component, the temperature control component being adapted to adjust the temperature of the at least one thermal composite roller; The electrode preheating assembly includes a first heating plate and a second heating plate, with the electrode located between the first heating plate and the second heating plate; the electrode includes a first surface and a second surface opposite to each other, the first surface being configured to contact the thermal composite roller, the second surface being configured to adhere to the diaphragm, the first heating plate being configured to heat the first surface, and the second heating plate being configured to heat the second surface.

2. The electrode thermal recombination device according to claim 1, characterized in that, The thermal composite roller assembly further includes a temperature sensor and a controller. The temperature sensor is configured to detect the temperature of the thermal composite roller and transmit it to the controller. The temperature regulating component is electrically connected to the controller. The controller is configured to control the temperature regulating component to adjust the temperature of at least one thermal composite roller according to the temperature detected by the temperature sensor.

3. The electrode thermal recombination device according to claim 2, characterized in that, The electrode preheating assembly includes a resistance temperature detector (RTD) heating assembly or an electromagnetic heating assembly.

4. The electrode thermal recombination device according to claim 3, characterized in that, The temperature control component includes a drive mechanism connected to the first heating plate to control the first heating plate to move closer to or further away from the electrode.

5. The electrode thermal recombination device according to claim 4, characterized in that, The driving mechanism includes a driving component and a sliding component. The first heating plate is mounted on the sliding component. The driving component is configured to drive the sliding component to slide so as to drive the first heating plate to slide. The driving component is electrically connected to the controller. The controller is configured to control the opening or closing of the driving component based on the temperature detected by the temperature sensor.

6. The electrode thermal recombination device according to claim 3, characterized in that, The second heating plate includes a first side and a second side, with an angle between the first side and the second side, the angle being less than or equal to 30°.

7. The electrode thermal recombination device according to claim 2, characterized in that, The temperature control assembly also includes a cooling element located near the thermal composite roller. The cooling element is electrically connected to the controller, which is configured to control the opening or closing of the cooling element based on the temperature detected by the temperature sensor.

8. The electrode thermal recombination device according to claim 2, characterized in that, The electrode preheating assembly is equipped with a motion sensor, which is electrically connected to the controller. The motion sensor is configured to detect the movement of the electrode and transmit the motion information to the controller. The controller is configured to be electrically connected to the electrode preheating assembly and control the opening of the electrode preheating assembly based on the movement of the electrode detected by the motion sensor.

9. The electrode thermal recombination device according to claim 1, characterized in that, The electrode preheating assembly includes a first preheating assembly and a second preheating assembly. The electrode includes a first positive electrode and a second positive electrode. The first preheating assembly is configured to heat the first positive electrode, and the second preheating assembly is configured to heat the second positive electrode. The first preheating assembly and the second preheating assembly are spaced apart and configured to work alternately.

10. A thermal composite device, characterized in that, The thermal bonding equipment includes the electrode thermal bonding device according to any one of claims 1 to 9 and the stacking device, wherein the thermal bonding device is configured to process and form a thermally bonded electrode assembly, and the stacking device is configured to stack the thermally bonded electrode assembly.

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