Pole piece pre-drying device and pole piece processing equipment

Abstract

The utility model discloses a pole piece pre-drying device and pole piece processing equipment. The pole piece pre-drying device comprises a conveying mechanism used for conveying coated pole pieces; the pre-drying assembly comprises a draught hood, a heating piece and an adjusting piece, the draught hood is arranged above the conveying mechanism, a hood opening of the draught hood is aligned to the conveying path of the pole pieces, and the heating piece is arranged in the draught hood and used for pre-drying the pole pieces; the adjusting part is connected to the draught hood and used for adjusting the size of a hood opening of the draught hood so as to be compatible with pole pieces of different sizes. By means of the mode, the cover opening of the pole piece pre-drying device can be matched and compatible with pole pieces of different sizes, the overall pre-drying effect on the pole pieces can be guaranteed, heat can be concentrated on the pole pieces, the heat can be effectively utilized, and the energy utilization efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to an electrode pre-baking device and electrode processing equipment. Background Technology

[0002] In the production process of battery electrodes, it is necessary to coat the foil with slurry and tab adhesive, and then send it into an oven for baking.

[0003] Before the electrode enters the oven, due to differences in solid content and the influence of molecular surface tension, the overlap boundary between the tab adhesive and the slurry will interpenetrate, which will lead to some adverse effects.

[0004] Therefore, pre-forming is performed before the electrode enters the drying oven to reduce the fluidity of the tab adhesive and prevent it from spreading to the slurry layer. However, the pre-drying port of existing electrode pre-drying devices is fixed, and electrodes of all sizes are pre-dryed using the same port. When the size of the electrode does not match the size of the pre-drying port, for example, if the width of the electrode is greater than the width of the pre-drying port, the pre-drying effect of some electrodes will inevitably fail to meet the requirements; or if the width of the electrode is greater than the width of the pre-drying port, a large amount of heat will be wasted during pre-drying. Utility Model Content

[0005] This application provides an electrode pre-drying device and electrode processing equipment to solve the problem that the pre-drying port of the existing electrode pre-drying device cannot match electrodes of various sizes and specifications.

[0006] To solve the above-mentioned technical problems, this application adopts a technical solution as follows: providing an electrode pre-baking device. This electrode pre-baking device includes: a conveying mechanism for conveying electrode sheets after coating; a pre-baking assembly including an exhaust hood, a heating element, and an adjusting element; the exhaust hood is disposed above the conveying mechanism, and the opening of the exhaust hood is aligned with the conveying path of the electrode sheet; the heating element is disposed inside the exhaust hood and is used to pre-bake the electrode sheet; the adjusting element is connected to the exhaust hood and is used to adjust the size of the exhaust hood opening to accommodate electrode sheets of different sizes.

[0007] In some embodiments, the adjusting member includes a shielding portion and a connecting portion connected together. The shielding portion is located below the opening of the exhaust hood. The connecting portion is provided with a first strip groove and is connected to the exhaust hood by a first fastener. Before the first fastener is tightened, the first strip groove allows the position of the connecting portion to be adjusted along the width direction of the opening of the exhaust hood, so as to drive the shielding portion to adjust the size of the opening of the exhaust hood in the width direction.

[0008] In some embodiments, the connecting portion includes a side plate and at least two hanging plates, the opposite sides of the side plate being bent and connected to the shielding portion and the at least two hanging plates respectively, and the hanging plates are provided with the first strip groove.

[0009] In some embodiments, the number of adjustment members is two, and the two adjustment members are spaced apart along the width direction of the hood opening and are both connected to the exhaust hood.

[0010] In some embodiments, the pre-baking assembly further includes a temperature controller and a temperature sensor, the temperature sensor being connected to the exhaust hood for detecting the pre-baking temperature of the electrode; the temperature controller being communicatively connected to the temperature sensor and adjusting the power of the heating element based on the pre-baking temperature fed back by the temperature sensor.

[0011] In some embodiments, the electrode pre-baking device further includes a crossbeam and a connector connecting the crossbeam. The connector has two second strip slots arranged in a figure-eight shape. The exhaust hood is connected to the two second strip slots by a second fastener. Before the second fastener is tightened, the two second strip slots allow the exhaust hood to be angled on a horizontal plane.

[0012] In some embodiments, the connector includes a first support plate and a second support plate that are vertically connected. The first support plate is provided with a third strip groove distributed in the vertical direction and is connected to the crossbeam by a third fastener. The third strip groove allows the connector to adjust the installation height in the vertical direction. The second support plate is provided with the two second strip grooves.

[0013] In some embodiments, the conveying mechanism is also used to simultaneously convey multiple electrode sheets arranged in a row;

[0014] The electrode pre-drying device includes multiple sets of pre-drying components, each set of pre-drying components being connected in a row to the crossbeam via corresponding connectors, in order to pre-dry multiple electrodes arranged in a row on the conveying mechanism.

[0015] In some embodiments, the exhaust hood is further connected to an exhaust fan to exhaust air through the exhaust and the exhaust hood.

[0016] To solve the above-mentioned technical problems, another technical solution adopted in this application is to provide an electrode processing device. This electrode processing device includes an oven and an electrode pre-drying device as described above. The oven is located downstream of the conveying mechanism. Before the electrode is conveyed into the oven by the conveying mechanism, the pre-drying component pre-dries the tab adhesive on the electrode.

[0017] The beneficial effects of this application are as follows: Unlike existing technologies, this application discloses an electrode pre-drying device and electrode processing equipment. By setting a pre-drying component above the conveying mechanism, the electrode can be pre-dried without interfering with the electrode conveying efficiency. Furthermore, the size of the exhaust hood opening can be adjusted to accommodate electrode sizes of different dimensions. This allows the electrode pre-drying device provided by this application to ensure the overall pre-drying effect on electrode sheets of various specifications while concentrating heat on the electrode, thus enabling effective heat utilization, improving energy efficiency, and relatively reducing energy consumption. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of the electrode pre-drying apparatus provided in this application;

[0020] Figure 2 Is it like this? Figure 1 A cross-sectional schematic diagram of the electrode pre-baking device shown.

[0021] Figure 3 Is it like this? Figure 1 A magnified schematic diagram of region A in the electrode pre-baking device shown;

[0022] Figure 4 Is it like this? Figure 1 A magnified schematic diagram of region B in the electrode pre-baking device shown;

[0023] Figure 5 This is a schematic diagram of another embodiment of the electrode pre-drying apparatus provided in this application;

[0024] Figure 6 This is a schematic diagram of an embodiment of the electrode processing equipment provided in this application. Detailed Implementation

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

[0026] The terms "first," "second," and "third" used in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0027] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0028] In the production process of battery electrodes, it is necessary to coat the foil with slurry and tab adhesive, and then put it into an oven for baking to cure the tab adhesive and slurry.

[0029] Before the electrode enters the oven, due to differences in solid content and the influence of molecular surface tension, the overlap boundary between the tab adhesive and the slurry will interpenetrate, resulting in the following adverse effects: 1. The slurry thickness in the fusion area will increase, causing the edges to curl up; 2. The slurry fusion will affect the performance of the lithium battery; 3. It will affect the accuracy of the tab cutting in the subsequent process (this boundary is the cutting reference).

[0030] Therefore, this application provides an electrode pre-baking device 100 to pre-bake the electrode before it enters the oven, so as to initially solidify the tab adhesive and slurry, reduce their fluidity, thereby reducing the risk of mutual penetration between the tab adhesive and slurry at the overlap boundary, and thus solving the adverse effects caused by mutual penetration between the tab adhesive and slurry at the overlap boundary.

[0031] See Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of an embodiment of the electrode pre-drying apparatus provided in this application. Figure 2 Is it like this? Figure 1 The diagram shows a cross-sectional view of the electrode pre-baking device.

[0032] The electrode pre-drying device 100 includes a conveying mechanism 10 and a pre-drying assembly 20. The conveying mechanism 10 is used to convey the electrode after coating. The pre-drying assembly 20 includes an exhaust hood 21, a heating element 22, and an adjusting element 23. The exhaust hood 21 is disposed above the conveying mechanism 10, and the opening 210 of the exhaust hood 21 is aligned with the conveying path of the electrode. The heating element 22 is disposed inside the exhaust hood 21 and is used to pre-dry the electrode. The adjusting element 23 is connected to the exhaust hood 21 and is used to adjust the size of the opening 210 of the exhaust hood 21 to accommodate electrode sheets of different sizes.

[0033] The conveying mechanism 10 is used to convey electrode sheets to the oven. The conveying mechanism 10 can be a belt conveyor or a roller conveyor. This application does not limit its specific structure.

[0034] A pre-drying assembly 20 is suspended above the conveying mechanism 10. The pre-drying assembly 20 can heat and pre-dry the electrode sheet before it enters the drying oven to reduce the risk of mutual penetration between the tab adhesive and the slurry at the overlap boundary.

[0035] Specifically, the exhaust hood 21 is a shell structure with an opening facing the conveying mechanism 10. The heat generated by the heating element 22 during operation is transferred to the electrode below through the opening to heat the pre-baked electrode.

[0036] The heating element 22 can be a resistance heater, an infrared heater, or an electromagnetic induction heater, etc.

[0037] Furthermore, the exhaust hood 21 is also connected to an exhaust fan (not shown) so that the gas evaporated from the tab adhesive and slurry during heating can be drawn away by the exhaust hood 21 to avoid environmental pollution.

[0038] In other words, during the pre-baking of the component 20, the heating and ventilation work together, and the evaporated gas can be extracted at the same time as heating, which not only pre-baked the electrode, but also avoided the pollution of the environment by the gas generated in the process.

[0039] Generally speaking, the size of the exhaust hood 21 is fixed and corresponds to a specific size of electrode. However, due to different process requirements in production, the electrode has a variety of sizes and specifications. Each specification of electrode is equipped with a separate electrode pre-drying device 100, which obviously leads to a great waste of resources.

[0040] Therefore, in this application, by connecting an adjusting member 23 to the exhaust hood 21, the size of the hood opening 210 of the exhaust hood 21 can be adjusted by the adjusting member 23, thereby making it compatible with electrode sheets of different sizes and achieving compatibility with electrode sheets of multiple specifications.

[0041] Specifically, the adjusting member 23 can adjust the degree to which it covers the cover opening 210 by changing its position, and can even completely cover the cover opening 210 or not cover the cover opening 210 at all, thereby changing the size of the exposed cover opening 210. The heating member 22 heats downward through the uncovered part of the cover opening 210. Therefore, the cover opening 210 can be adjusted to match various specifications and sizes of electrode sheets, so as to ensure the overall pre-baking effect of the electrode sheets and concentrate the heat in the overlapping area, so that the heat can be effectively utilized, improving energy utilization efficiency and relatively reducing energy consumption.

[0042] Optionally, the adjusting member 23 can be a plate structure and is slidably disposed at the opening 210 of the exhaust hood 21. For example, a groove is provided at the opening 210, and the adjusting member 23 is slidably disposed in the groove so that the size of the opening 210 can be adjusted by adjusting the position of the adjusting member 23.

[0043] Please refer to the following: Figure 2 and Figure 3 ,in Figure 3 Is it like this? Figure 1 A magnified schematic diagram of region A in the electrode pre-baking device shown.

[0044] In this embodiment, the adjusting member 23 includes a shielding part 230 and a connecting part 232 connected to each other. The shielding part 230 is located below the opening 210 of the exhaust hood 21. The connecting part 232 is provided with a first strip groove 233 and is connected to the exhaust hood 21 by a first fastener. Before the first fastener is tightened, the first strip groove 233 allows the position of the connecting part 232 to be adjusted along the width direction of the opening 210 of the exhaust hood 21, so as to drive the shielding part 230 to adjust the size of the opening 210 of the exhaust hood 21 in the width direction.

[0045] The shielding part 230 is a shielding plate. The connection position between the connecting part 232 and the exhaust hood 21 is adjusted by the first strip groove 233, thereby changing the position of the shielding part 230 and adjusting the degree to which it shields the hood opening 210, thus changing the size of the exposed hood opening 210 in the width direction.

[0046] Optionally, there are two connecting parts 232, which are respectively disposed at both ends of the shielding part 230 along the length direction of the cover opening 210. The exhaust hood 21 has connecting holes on both side walls along the length direction. The first strip groove 233 is distributed along the width direction. The first fastener connects the first strip groove 233 and the connecting hole. Before the first fastener is tightened, the first strip groove 233 allows the position of the connecting part 232 to be adjusted along the width direction of the cover opening 210 of the exhaust hood 21, so as to drive the shielding part 230 to adjust the size of the cover opening 210 of the exhaust hood 21 in the width direction.

[0047] In this embodiment, the connecting part 232 includes a side plate 234 and at least two hanging plates 236. The opposite sides of the side plate 234 are bent and connected to the shielding part 230 and the at least two hanging plates 236 respectively. The hanging plate 236 is provided with a first strip groove 233.

[0048] The hanging plate 236, side plate 234 and shielding part 230 are connected to form a U-shaped structure. The hanging plate 236 is located above the shielding part 230 and can be hung on the exhaust hood 21. For example, the exhaust hood 21 is provided with a bracket or extended support plate. So, during assembly, the hanging plate 236 can be hung on the bracket or support plate first, and then the first strip groove 233 and the bracket or support plate can be pre-connected by the first fastener. After that, the position of the first strip groove 233 relative to the first fastener can be adjusted to adjust the degree to which the shielding part 230 blocks the hood opening 210.

[0049] Furthermore, the first groove 233 has an open end near the edge, so the first fastener can be pre-connected to the exhaust hood 21, and then the first groove 233 can be locked onto the first fastener, and the position of the first groove 233 relative to the first fastener can be adjusted.

[0050] As can be seen, the adjusting member 23 in this embodiment has a simple structure, is easy to install on the exhaust hood 21, and can easily adjust the degree to which it covers the hood opening 210, thereby adjusting the size of the exposed hood opening 210.

[0051] Optionally, there is one adjusting element 23, which is connected to one side of the exhaust hood 21 in the width direction, and the size of the hood opening 210 can be adjusted from one side.

[0052] In this embodiment, there are two adjusting members 23, and the two adjusting members 23 are spaced apart along the width direction of the cover opening 210 and are both connected to the exhaust cover 21, so that the size of the cover opening 210 can be adjusted from both sides to better adapt to the conveying path of the aligned electrode.

[0053] See Figure 1 and Figure 3 Furthermore, the pre-baking assembly 20 also includes a temperature controller (not shown) and a temperature sensor 24. The temperature sensor 24 is connected to the exhaust hood 21 and is used to detect the pre-baking temperature of the electrode. The temperature controller is communicatively connected to the temperature sensor 21 and adjusts the power of the heating element 22 based on the pre-baking temperature feedback from the temperature sensor.

[0054] Temperature sensor 22 is used to detect the pre-baking temperature on the electrode in real time. It can detect the temperature at the tab adhesive and feed it back to the temperature controller, so that the temperature controller can adjust the heating element 22 according to the set temperature parameters to keep the heating temperature of the electrode constant.

[0055] For example, if the pre-baking temperature is set to 60 degrees, when the detected real-time temperature reaches 65 degrees, the temperature controller can reduce the power of the heating element 22 to adjust the temperature to 60 degrees. If the temperature drops below 60 degrees, the temperature controller can increase the power of the heating element 22 in real time based on the set parameters.

[0056] Of course, in actual use, the controlled temperature may vary within ±1 degree of the preset pre-baking temperature, thus providing a constant pre-baking temperature for the electrode.

[0057] See also Figure 1 and Figure 4 , Figure 4 Is it like this? Figure 1 A magnified schematic diagram of region B in the electrode pre-baking device shown.

[0058] In this embodiment, the electrode pre-baking device 100 also includes a crossbeam 30 and a connector 32 connecting the crossbeam 30. The connector 32 is provided with two second strip grooves 320 arranged in a figure-eight shape. The exhaust hood 21 is connected to the two second strip grooves 320 by a second fastener. Before the second fastener is tightened, the two second strip grooves allow the exhaust hood 21 to be angled on the horizontal plane, and of course, also allow the exhaust hood 120 to be positionally adjusted in the width direction.

[0059] Among them, the two second strip slots 320 arranged in a figure-eight shape can first adapt to a variety of exhaust hoods 21 with different hole spacing. The exhaust hood 21 is provided with connecting holes corresponding to the second strip slots 320. Due to manufacturing process errors, even if there are errors in the hole spacing of the two connecting holes, the two second strip slots 320 can still be connected because the hole spacing of the two second strip slots 320 arranged in a figure-eight shape is within a certain range.

[0060] Furthermore, on a horizontal plane parallel to the conveying plane of the conveying mechanism 10, the two second strip grooves 320 also allow the exhaust hood 21 to be angled on this horizontal plane so that the opening 210 of the exhaust hood 21 is aligned with the electrode.

[0061] like Figure 4 As shown, the connector 32 includes a first support plate 321 and a second support plate 322 that are vertically connected. The first support plate 321 is provided with a third strip groove 323 distributed in the vertical direction and is connected to the crossbeam 30 by a third fastener. The third strip groove 323 allows the connector 32 to adjust its installation height in the vertical direction. The second support plate 322 is provided with two second strip grooves 320.

[0062] By setting the third strip groove 323, the installation height of the pre-drying component 20 can be adjusted to adjust its distance from the electrode plate on the conveying mechanism 10, thereby adjusting the pre-drying effect.

[0063] See Figure 5 , Figure 5 This is a schematic diagram of another embodiment of the electrode pre-drying device provided in this application. In this embodiment, the conveying mechanism 10 is also used to simultaneously convey multiple electrodes arranged in a row; wherein, the electrode pre-drying device 100 includes multiple sets of pre-drying components 20, and the multiple sets of pre-drying components 20 are respectively connected in a row to the crossbeam 30 through corresponding connectors 32, so as to pre-dry the multiple electrodes arranged in a row on the conveying mechanism 10.

[0064] In other words, the feeding mechanism 10 can simultaneously convey multiple electrode sheets arranged in a row, and each pre-drying component 20 heats and pre-dries the corresponding electrode sheet to improve the pre-drying efficiency of multiple electrode sheets.

[0065] See Figure 6 , Figure 6 This is a schematic diagram of an embodiment of the electrode processing equipment provided in this application.

[0066] Based on this, this application also provides an electrode processing equipment 200, which includes an oven 201 and an electrode pre-drying device 100 as described above. The oven is located downstream of the conveying mechanism 10. Before the electrode is conveyed into the oven by the conveying mechanism 10, the pre-drying component 20 pre-dries the tab adhesive on the electrode.

[0067] Unlike existing technologies, this application discloses an electrode pre-drying device and electrode processing equipment. By setting a pre-drying component above the conveying mechanism, the electrode can be pre-dried without interfering with the conveying efficiency of the electrode. Furthermore, the size of the exhaust hood opening can be adjusted to accommodate electrode sizes of different dimensions. This allows the electrode pre-drying device provided by this application to ensure both the overall pre-drying effect on the electrode and to concentrate heat on the electrode, enabling effective heat utilization, improving energy efficiency, and relatively reducing energy consumption.

[0068] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. An electrode pre-drying device, characterized in that, include: A conveying mechanism used to transport the coated electrode sheets; The pre-baking assembly includes an exhaust hood, a heating element, and an adjusting element. The exhaust hood is positioned above the conveying mechanism, and its opening is aligned with the conveying path of the electrode sheet. The heating element is located inside the exhaust hood and is used to pre-bake the electrode sheet. The adjusting element is connected to the exhaust hood and is used to adjust the size of the exhaust hood opening to accommodate electrode sheets of different sizes.

2. The electrode pre-baking apparatus according to claim 1, characterized in that, The adjusting component includes a shielding part and a connecting part connected together. The shielding part is located below the opening of the exhaust hood. The connecting part is provided with a first strip groove and is connected to the exhaust hood by a first fastener. Before the first fastener is tightened, the first strip groove allows the position of the connecting part to be adjusted along the width direction of the opening of the exhaust hood, so as to drive the shielding part to adjust the size of the opening of the exhaust hood in the width direction.

3. The electrode pre-baking apparatus according to claim 2, characterized in that, The connecting part includes a side plate and at least two hanging plates. The opposite sides of the side plate are bent and connected to the shielding part and the at least two hanging plates, respectively. The hanging plates are provided with the first strip groove.

4. The electrode pre-baking apparatus according to any one of claims 1-3, characterized in that, The number of the adjusting components is two, and the two adjusting components are spaced apart along the width direction of the hood opening and are both connected to the exhaust hood.

5. The electrode pre-baking apparatus according to claim 1, characterized in that, The pre-baking assembly also includes a temperature controller and a temperature sensor. The temperature sensor is connected to the exhaust hood and is used to detect the pre-baking temperature of the electrode. The temperature controller is communicatively connected to the temperature sensor and adjusts the power of the heating element based on the pre-baking temperature fed back by the temperature sensor.

6. The electrode pre-baking apparatus according to claim 1, characterized in that, The electrode pre-baking device also includes a crossbeam and a connector connecting the crossbeam. The connector has two second strip slots arranged in a figure-eight shape. The exhaust hood is connected to the two second strip slots by a second fastener. Before the second fastener is tightened, the two second strip slots allow the exhaust hood to be angled on the horizontal plane.

7. The electrode pre-baking apparatus according to claim 6, characterized in that, The connector includes a first support plate and a second support plate that are vertically connected. The first support plate is provided with a third strip groove distributed in the vertical direction and is connected to the crossbeam by a third fastener. The third strip groove allows the connector to adjust the installation height in the vertical direction. The second support plate is provided with the two second strip grooves.

8. The electrode pre-baking apparatus according to claim 7, characterized in that, The conveying mechanism is also used to simultaneously convey multiple electrode sheets arranged in rows; The electrode pre-drying device includes multiple sets of pre-drying components, each set of pre-drying components being connected in a row to the crossbeam via corresponding connectors, in order to pre-dry multiple electrodes arranged in a row on the conveying mechanism.

9. The electrode pre-baking apparatus according to claim 1, characterized in that, The exhaust hood is also connected to an exhaust fan to exhaust air through the exhaust and the exhaust hood.

10. An electrode processing device, characterized in that, The device includes an oven and an electrode pre-drying apparatus as described in any one of claims 1 to 9, wherein the oven is located downstream of the conveying mechanism, and the pre-drying assembly pre-dries the tab adhesive on the electrode before the electrode is conveyed into the oven by the conveying mechanism.

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