Pole piece assembling device

Abstract

The utility model provides a pole piece assembling device. The pole piece assembling device comprises pole piece assembling equipment and a heating unit, the pole piece assembling equipment comprises a pole piece supporting unit, and a heating unit is arranged on the pole piece supporting unit; wherein the pole piece assembling equipment is configured to assemble pole pieces on the pole piece supporting unit, and the heating unit is configured to heat the pole pieces on the pole piece supporting unit. The heating element is arranged on the pole piece supporting unit of the pole piece assembling equipment, and in the pole piece assembling process of the pole piece assembling equipment, the heating element can heat the pole piece at the same time so as to preheat the pole piece. On one hand, the arrangement of independent heating equipment can be reduced, and the cost in the pole piece production process is reduced. On the other hand, pole piece assembling and heating are carried out at the same time, the original series execution process is converted into parallel execution, the pole piece generation period can be shortened, and the production efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of battery manufacturing, and in particular, to a pole piece assembly device. Background Art

[0002] In the current battery manufacturing field, especially in the production process of lithium-ion batteries, the production of pole pieces is a crucial link. At present, the production of pole pieces needs to go through multiple process stages such as "stacking → preheating → hot pressing". Among them, the preheating step is to heat the pole piece material to a certain temperature, thereby improving the material's processability and hot pressing effect. The conventional tunnel preheating process takes about 15 minutes. The entire pole piece production cycle is long and the investment cost is relatively high. Utility Model Content

[0003] In view of this, an object of an embodiment of the present application is to provide a pole piece assembly device that can reduce costs and improve efficiency.

[0004] In a first aspect, an embodiment of the present application provides a pole piece assembly device, comprising: a pole piece assembly device and a heating unit; the pole piece assembly device comprises a pole piece support unit, and the heating unit is arranged on the pole piece support unit; wherein the pole piece assembly device is configured to assemble the pole piece on the pole piece support unit, and the heating unit is configured to heat the pole piece on the pole piece support unit.

[0005] In the above implementation process, by setting the heating element on the pole piece support unit of the pole piece assembly equipment, the heating element can heat the pole piece at the same time during the process of assembling the pole piece by the pole piece assembly equipment to preheat the pole piece. On the one hand, the setting of separate heating equipment can be reduced, and the cost in the pole piece production process can be reduced. On the other hand, the pole piece assembly and heating are carried out simultaneously, and the process originally executed in series is converted into parallel execution, which can shorten the cycle of pole piece generation and improve production efficiency.

[0006] In one embodiment, the heating unit includes: a first heating element and a second heating element; the first heating element is arranged on the plane where the pole piece support unit supports the pole piece; the second heating element is arranged around the pole piece support unit, and the extension plane where the second heating element is located intersects with the extension plane where the pole piece support unit is located.

[0007] In the above implementation process, by providing a first heating element and a second heating element, the first heating element is provided on the plane of the electrode supporting unit supporting the electrode, and the second heating element is provided around the electrode supporting unit. During the heating process of the heating unit heating the electrode, the first heating element and the second heating element can cooperate to heat the electrode uniformly, thereby improving the heating effect of the electrode.

[0008] In one embodiment, the first heating element is a heating module, which is configured to heat the pole piece through contact heat transfer between the heating module and the pole piece; the second heating element is a thermal radiation module, which is configured to heat the pole piece by emitting thermal radiation to the surface of the pole piece.

[0009] In the above implementation process, by setting the first heating element as a heating module, and the first heating element is arranged on the plane of the electrode supporting unit supporting the electrode, when the electrode is placed on the electrode supporting unit, the electrode can be directly heated by the first heating element, thereby improving the heating efficiency of the electrode. In addition, by setting the second heating element as a heat radiation module, and the second heating element is arranged around the electrode supporting unit, the second heating element can indirectly heat the other surfaces of the electrode that are not in contact with the electrode supporting unit, thereby achieving uniform heating of the electrode and enhancing the heating effect of the electrode.

[0010] In one embodiment, the first heating element is a heating plate, which is arranged on a side of the pole piece support unit close to the pole piece or the heating plate is arranged on a side of the pole piece support unit away from the pole piece; or, the first heating element is a heating resistor, which is integrated inside the pole piece support unit.

[0011] In the above implementation process, according to the different existence forms of the first heating element, the corresponding connection method is adopted to connect with the pole piece support unit, so as to realize multiple setting methods of the first heating element and the pole piece support unit, improve the diversity of the pole piece assembly device, and increase the applicable scenarios of the pole piece assembly device.

[0012] In one embodiment, it further includes: a temperature detection unit; the temperature detection unit is arranged on the pole piece supporting unit, and the temperature detection unit is configured to detect the pole piece temperature.

[0013] In the above implementation process, a temperature detection unit is set on the pole piece support unit. The temperature detection unit is used to detect the pole piece temperature, so as to timely control the heating condition of the pole piece by the heating unit according to the pole piece temperature, so that the pole piece is maintained within the hot pressing temperature range, thereby improving the heating effect of the pole piece.

[0014] In one embodiment, it also includes: a controller; the controller is connected to the temperature detection unit and the heating unit; the temperature detection unit is configured to send the pole piece temperature to the controller; the controller is configured to adjust the heating mode of the heating unit when the pole piece temperature exceeds the temperature threshold and / or the pole piece temperature heating rate exceeds the heating threshold.

[0015] In the above implementation process, by setting up a controller, and the controller is connected to the temperature detection unit and the heating unit, the heating mode of the heating unit can be adjusted in real time according to the electrode temperature detected by the temperature detection unit, so that the electrode temperature is always maintained within the temperature threshold range, thereby improving the heating effect of the electrode.

[0016] In one embodiment, the electrode assembly equipment is a cutting and stacking machine, and the electrode support unit is a storage table; the heating unit is arranged on the storage table; wherein the cutting and stacking machine is configured to cut and stack battery cell electrodes on the storage table, and the heating unit is configured to heat the electrode placed on the storage table.

[0017] In the above implementation process, when the electrode assembly equipment is a cutting and stacking machine, the heating unit is set on the storage table. During the electrode assembly process, the heating unit heats the electrode on the storage table at the same time to complete the electrode preheating process at the same time. On the one hand, there is no need to specially set up corresponding heating equipment, saving the cost of electrode assembly. On the other hand, while assembling the electrode, the heating unit heats the electrode, and the two original series processes are carried out in parallel, which can reduce the electrode generation time and improve the electrode production efficiency.

[0018] In one embodiment, the heating unit includes: a first heating element and a second heating element; wherein, there are multiple second heating elements; the first heating element is arranged on the placement table; multiple second heating elements are respectively arranged on both sides of the placement table along the pole piece transmission direction; wherein, the second heating element is oblique to the plane where the first heating element is located.

[0019] In the above implementation process, by arranging the second heating element on both sides of the storage table, the influence of the second heating element on the stacking device, cutting device, etc. on the electrode operation can be reduced, the smoothness of the electrode assembly device in executing various actions can be improved, and the working efficiency of the electrode assembly device can be improved.

[0020] In one embodiment, the electrode sheet assembly equipment is an integrated winding machine, and the electrode sheet support unit is a collection reel; the heating unit is arranged on the collection reel; wherein, the electrode sheet assembly equipment is configured to alternately wind the positive and negative electrode sheets through the collection reel, and the heating unit is configured to heat the electrode sheets wound on the collection reel.

[0021] In the above implementation process, when the pole piece assembly equipment is a winding machine, the heating unit is set on the collection reel. During the pole piece assembly process, the heating unit heats the pole piece on the collection reel at the same time to complete the pole piece preheating process at the same time. On the one hand, there is no need to specially set up corresponding heating equipment, saving the pole piece assembly cost. On the other hand, while assembling the pole piece, the heating unit heats the pole piece, and the two original series processes are carried out in parallel, which can reduce the pole piece generation time and improve the pole piece production efficiency.

[0022] In one embodiment, the heating unit includes: a first heating element and a second heating element; wherein, there are multiple second heating elements; the first heating element is arranged on the collection roll; multiple second heating elements are respectively arranged at both ends of the collection roll, and the second heating element is arranged non-contact with the collection roll.

[0023] In the above implementation process, by arranging the second heating element at both ends of the collection reel, the influence of the second heating element on the operation of the collection reel can be reduced, the smoothness of winding the pole piece by the collection reel is improved, and the working efficiency of the pole piece assembly device is improved.

[0024] In order to make the above-mentioned objects, features and advantages of the present application more obvious and understandable, embodiments are given below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of a pole piece assembly device provided in an embodiment of the present application as a cutting and stacking machine;

[0027] Figure 2 The pole piece assembly equipment provided for the embodiment of the present application is a schematic diagram of a winding machine.

[0028] Description of the drawings: 100 - heating unit, 110 - first heating element, 120 - second heating element, 200 - reel, 20 - pole piece. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present application, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are orientations or positional relationships that are commonly visited when the application product is used. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be interpreted as a limitation of the present application.

[0033] In the description of this application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] The existing lithium battery pole core production process mainly includes the following processes: lamination → preheating → hot pressing. Lamination is to alternately stack multiple positive and negative electrode material layers to form a preliminary pole structure; the preheating step is to heat the pole material to a certain temperature to improve the material's processability and hot pressing effect; hot pressing is a key step in pole production. Through the action of high temperature and high pressure, the various layers of material inside the pole are tightly combined to form a solid overall structure. These processes play a vital role in the battery production process.

[0035] However, after long-term research, the inventors of the present application discovered that the above-mentioned pole core production process has defects such as long process cycle, high investment cost and damage to the pole core.

[0036] In view of this, the present application proposes a pole piece assembly device, which sets a heating element on a pole piece support unit of a pole piece assembly device. During the process of assembling the pole piece by the pole piece assembly device, the heating element can heat the pole piece at the same time to preheat the pole piece. On the one hand, the setting of separate heating equipment can be reduced, and the cost in the pole piece production process can be reduced. On the other hand, the pole piece assembly and heating are carried out simultaneously, and the process originally executed in series is converted into parallel execution, which can shorten the cycle of pole piece generation and improve production efficiency.

[0037] like Figure 1 , Figure 2 , is a schematic diagram of a pole piece assembly device provided in an embodiment of the present application, comprising: a pole piece assembly device and a heating unit 100 .

[0038] The pole piece assembly device includes a pole piece support unit, and the heating unit 100 is disposed on the pole piece support unit. The pole piece assembly device is configured to assemble the pole piece 20 on the pole piece support unit, and the heating unit 100 is configured to heat the pole piece 20 on the pole piece support unit.

[0039] The pole piece support unit here is used to support the pole piece assembly device to assemble the pole piece 20. The pole piece support unit can be a storage table, a collection reel 200 and other components, and the pole piece support unit can be selected according to actual conditions.

[0040] The above-mentioned heating unit 100 is one or more heating elements. The heating unit 100 can be a resistance wire, a heating plate, a heat radiation module, etc. The heating element can be selected according to actual conditions.

[0041] It should be understood that when the pole piece assembly device assembles the pole piece 20, the pole piece support unit supports the pole piece 20 so as to perform operations such as stacking, winding, and cutting the pole piece 20 on the pole piece support unit. Since the heating element is disposed on the pole piece support unit, during the process of assembling the pole piece 20 by the pole piece assembly device, the heating element can heat the pole piece 20 at the same time so as to preheat the pole piece 20.

[0042] Optionally, the heating unit 100 can be fixedly disposed on the pole piece supporting unit, or can be detachably disposed on the pole piece supporting unit. The connection method between the heating unit 100 and the pole piece supporting unit can be selected according to actual conditions.

[0043] In the above implementation process, by setting the heating element on the pole piece support unit of the pole piece assembly equipment, the heating element can heat the pole piece 20 at the same time during the process of assembling the pole piece 20 by the pole piece assembly equipment, so as to preheat the pole piece 20. On the one hand, the setting of separate heating equipment can be reduced, and the cost in the production process of the pole piece 20 can be reduced. On the other hand, the pole piece assembly and heating are carried out simultaneously, and the process originally executed in series is converted into parallel execution, which can shorten the cycle of the pole piece 20 generation and improve the production efficiency.

[0044] In a possible implementation, the heating unit 100 includes: a first heating element 110 and a second heating element 120 .

[0045] The first heating element 110 is arranged on the plane where the pole piece support unit supports the pole piece 20; the second heating element 120 is arranged around the pole piece support unit, and the extension plane where the second heating element 120 is located intersects with the extension plane where the pole piece support unit is located.

[0046] Optionally, the first heating element 110 and the second heating element 120 may be the same heating element or different heating elements. The first heating element 110 and the second heating element 120 may be selected according to actual conditions.

[0047] The first heating element 110 here can be arranged on a side of the pole piece support unit in contact with the pole piece 20, or on a side of the pole piece support unit away from the pole piece 20. The specific setting position of the first heating element 110 can be selected according to actual conditions.

[0048] In one embodiment, the first heating element 110 can be laid flat on the plane on which the pole piece supporting unit supports the pole piece 20 .

[0049] Optionally, the first heating element 110 is connected to the pole piece support unit by bonding, screw connection, clamping, integrated setting, etc. The connection method between the first heating element 110 and the pole piece support unit can be selected according to actual conditions.

[0050] The second heating element 120 can be connected to the electrode support unit or can be independent of the electrode support unit. The second heating element 120 can be arranged in a manner selected according to actual conditions.

[0051] For example, if the electrode support unit is a storage table, the second heating element 120 can be arranged on the side of the storage table along the transmission direction of the electrode 20. The extension direction of the second heating element 120 can be perpendicular to the extension direction of the storage table, and the extension direction of the second heating element 120 can also be obliquely intersected with the extension direction of the storage table.

[0052] If the electrode support unit is a collection shaft 200 , the second heating element 120 can be arranged in the direction of rotation of the collection shaft 200 , and the second heating element 120 and the collection shaft 200 are arranged non-contactingly to avoid the second heating element 120 affecting the collection shaft 200 winding the electrode 20 .

[0053] It can be understood that the first heating element 110 is used to heat the plane where the pole piece 20 contacts the pole piece support unit, and the second heating element 120 is used to heat the other planes of the pole piece 20. The first heating element 110 and the second heating element 120 are used to achieve uniform heating of the pole piece 20.

[0054] In the above implementation process, the first heating element 110 and the second heating element 120 are arranged, and the first heating element 110 is arranged on the plane of the electrode support unit supporting the electrode 20, and the second heating element 120 is arranged around the electrode support unit. During the heating unit 100 heating the electrode 20, the first heating element 110 and the second heating element 120 can cooperate to uniformly heat the electrode 20, thereby improving the heating effect of the electrode 20.

[0055] In a possible implementation, the first heating element 110 is a heat generating module, and the second heating element 120 is a heat radiation module.

[0056] The heating module is configured to heat the pole piece 20 through contact heat transfer with the pole piece 20 ; the heat radiation module is configured to heat the pole piece 20 by emitting heat radiation to the surface of the pole piece 20 .

[0057] The heating module here is a heating element that works by heat conduction. Heat conduction means that heat is transferred from the high-temperature part to the low-temperature part along the object. The heat radiation module transfers heat directly to the object in the form of electromagnetic waves. The heat radiation module can transfer heat energy to the object in a non-contact manner to achieve indirect heating.

[0058] In the above implementation process, by setting the first heating element 110 as a heating module, and the first heating element 110 is set on the plane of the pole piece support unit supporting the pole piece 20, when the pole piece 20 is placed on the pole piece support unit, the pole piece 20 can be directly heated by the first heating element 110, thereby improving the heating efficiency of the pole piece 20. In addition, by setting the second heating element 120 as a heat radiation module, and the second heating element 120 is set around the pole piece support unit, the second heating element 120 can indirectly heat the other surfaces of the pole piece 20 that are not in contact with the pole piece support unit, thereby achieving uniform heating of the pole piece 20 and enhancing the heating effect of the pole piece 20.

[0059] In one possible implementation, the first heating element 110 is a heating plate, which is arranged on a side of the pole piece support unit close to the pole piece 20 or on a side of the pole piece support unit away from the pole piece 20; or, the first heating element 110 is a heating resistor, which is integrated inside the pole piece support unit.

[0060] Optionally, when the heating plate is arranged on a side of the pole piece support unit close to the pole piece 20 or the heating plate is arranged on a side of the pole piece support unit away from the pole piece 20, the heating plate can be detachably connected to the pole piece support unit (such as by bolt connection, screw connection, bonding, etc.), and the heating plate can also be fixedly connected to the pole piece support unit (such as an integrated setting, welding, etc.), and the connection method between the heating plate and the pole piece support unit can be selected according to actual conditions.

[0061] The shape of the heating plate here can be completely consistent with the pole piece support unit, or can be other shapes with an area smaller than the pole piece support unit. The existence form of the heating plate can be set according to actual conditions.

[0062] In one embodiment, there may be multiple heating resistors integrated inside the pole piece supporting unit.

[0063] Optionally, the plurality of heating resistors may be arranged without gaps or at intervals. The arrangement of the heating resistors may be selected according to actual conditions.

[0064] In the above implementation process, according to the different existence forms of the first heating element 110, the corresponding connection method is adopted to connect with the pole piece support unit, so as to realize a variety of setting methods of the first heating element 110 and the pole piece support unit, improve the diversity of the pole piece assembly device, and increase the applicable scenarios of the pole piece assembly device.

[0065] In a possible implementation, the system further includes: a temperature detection unit.

[0066] The temperature detection unit is disposed on the pole piece supporting unit, and the temperature detection unit is configured to detect the temperature of the pole piece 20 .

[0067] The temperature detection unit here can be a thermistor, a thermocouple, infrared technology, a semiconductor temperature sensor, an optical fiber temperature sensor and other components, and the temperature detection unit can be selected according to actual conditions.

[0068] It should be understood that the pole piece 20 needs to go through die cutting, assembly, preheating, hot pressing and other steps during the production process. Among them, the pole piece 20 is preheated before hot pressing. Hot pressing has certain restrictions on the temperature of the pole piece 20. Too high or too low may affect the hot pressing effect. By setting a temperature detection unit, the temperature detection unit can detect the temperature of the pole piece 20 to ensure that the temperature of the pole piece 20 undergoing hot pressing is maintained within the hot pressing temperature range.

[0069] In one embodiment, the heating temperature of the pole piece 20 is 40° to 90°.

[0070] In the above implementation process, a temperature detection unit is set on the pole piece support unit. The temperature detection unit is used to detect the temperature of the pole piece 20, so as to timely control the heating condition of the pole piece 20 by the heating unit 100 according to the temperature of the pole piece 20, so that the pole piece 20 is maintained within the hot pressing temperature range, thereby improving the heating effect of the pole piece 20.

[0071] In a possible implementation, the system further includes: a controller.

[0072] The controller is connected to the temperature detection unit and the heating unit 100 .

[0073] The temperature detection unit here is configured to send the temperature of the pole piece 20 to the controller; the controller is configured to adjust the heating mode of the heating unit 100 when the temperature of the pole piece 20 exceeds the temperature threshold and / or the temperature rise rate of the pole piece 20 exceeds the temperature rise threshold.

[0074] Optionally, the controller can be a separate device independent of the pole piece assembly device (such as a server, a personal computer, a smart phone, etc.), or it can be an integrated device integrated inside the pole piece assembly device as a component of the pole piece assembly device (such as a single chip microcomputer, a programmable controller, etc.). The type and existence form of the controller can be selected according to actual conditions.

[0075] The above temperature threshold can be set according to the temperature requirement in the hot pressing process, such as the temperature threshold can be 40° to 90°, 50° to 80°, etc. The temperature threshold can be selected according to actual conditions.

[0076] The temperature rise threshold here refers to the rate range of temperature rise per unit time. For example, the temperature rise threshold can be 20 degrees per second to 30 degrees per second, 30 degrees per second to 50 degrees per second, etc. The temperature rise threshold can be selected according to actual conditions.

[0077] Optionally, adjusting the heating mode of the heating unit 100 may include: adjusting parameters such as the heating temperature, air outlet rate, and heating time of the heating unit 100 .

[0078] In the above implementation process, by setting up a controller, and the controller is connected to the temperature detection unit and the heating unit 100, the heating mode of the heating unit 100 can be adjusted in real time according to the temperature of the pole piece 20 detected by the temperature detection unit, so that the temperature of the pole piece 20 is always maintained within the temperature threshold range, thereby improving the heating effect of the pole piece 20.

[0079] In one possible implementation, Figure 1As shown, the pole piece assembly equipment is a cutting and stacking machine, and the pole piece supporting unit is a storage table.

[0080] The heating unit 100 is disposed on the storage table.

[0081] The integrated cutting and stacking machine is configured to cut and stack the cell pole pieces 20 on the storage table, and the heating unit 100 is configured to heat the pole pieces 20 placed on the storage table.

[0082] In one embodiment, the cutting and stacking machine includes a heating unit 100, a storage table, a cutting device, and a stacking device. During the electrode assembly process of the cutting and stacking machine, the stacking device stacks the electrode 20 on the storage table, and the cutting device cuts the electrode 20 on the storage table to a suitable size. The assembly of the electrode 20 is completed through the cooperation of the stacking device and the cutting device. During the electrode assembly process, the heating unit 100 heats the electrode 20 on the storage table at the same time to complete the electrode preheating process at the same time.

[0083] In the above implementation process, when the electrode assembly equipment is a cutting and stacking machine, the heating unit 100 is set on the storage table. During the electrode assembly process, the heating unit 100 heats the electrode 20 on the storage table at the same time to complete the electrode preheating process at the same time. On the one hand, there is no need to specially set up corresponding heating equipment, saving the cost of electrode assembly. On the other hand, while assembling the electrode, the heating unit 100 heats the electrode 20, and the two original series processes are carried out in parallel, which can reduce the generation time of the electrode 20 and improve the production efficiency of the electrode 20.

[0084] In a possible implementation, the heating unit 100 includes: a first heating element 110 and a second heating element 120 ; wherein the number of the second heating element 120 is plural.

[0085] Here, the first heating element 110 is arranged on the storage table; and the plurality of second heating elements 120 are respectively arranged on both sides of the storage table along the transmission direction of the pole piece 20 .

[0086] The second heating element 120 is oblique to the plane where the first heating element 110 is located.

[0087] Exemplarily, as shown in the figure, one side of the second heating element 120 can be connected to both sides of the storage table along the transmission direction of the pole piece 20, and the extension plane of the second heating element 120 is perpendicular to the extension plane of the first heating element 110.

[0088] One side of the second heating element 120 can be connected to two sides of the storage platform along the transmission direction of the pole piece 20, and the extension plane of the second heating element 120 and the extension plane of the first heating element 110 form an angle of 60°.

[0089] One side of the second heating element 120 can be connected to two sides of the storage platform along the transmission direction of the pole piece 20, and the extension plane of the second heating element 120 and the extension plane of the first heating element 110 form an angle of 120°.

[0090] It is understandable that since the electrode sheets 20 need to be stacked and cut on the storage table, the stacking device needs to place and cut the electrode sheets 20 on the storage table. Therefore, the second heating element 120 should be arranged to avoid affecting the operation of the stacking device and the cutting device on the electrode sheets 20.

[0091] In the above implementation process, by arranging the second heating element 120 on both sides of the storage table, the influence of the second heating element 120 on the operation of the stacking device, cutting device, etc. on the electrode 20 can be reduced, thereby improving the smoothness of the electrode assembly device in performing various actions and improving the working efficiency of the electrode assembly device.

[0092] In one possible implementation, Figure 2 As shown, the pole piece assembly equipment is a winding machine, and the pole piece supporting unit is a reel 200 .

[0093] The heating unit 100 is disposed on the reel 200 .

[0094] The electrode sheet assembly device here is configured to alternately wind the positive and negative electrode sheets 20 through the winding reel 200 , and the heating unit 100 is configured to heat the electrode sheets 20 wound on the winding reel 200 .

[0095] In one embodiment, the winding machine includes a heating unit 100, a driving device, and a collection reel 200. When the winding machine performs the electrode assembly operation, the driving device drives the collection reel 200 to rotate, and the electrode 20 is wound on the collection reel 200 to complete the assembly of the electrode 20. During the electrode assembly process, the heating unit 100 heats the electrode 20 on the collection reel 200 at the same time, so as to complete the electrode preheating process at the same time.

[0096] In the above implementation process, when the pole piece assembly equipment is a winding machine, the heating unit 100 is set on the collection reel 200. During the pole piece assembly process, the heating unit 100 heats the pole piece 20 on the collection reel 200 at the same time to complete the pole piece preheating process at the same time. On the one hand, there is no need to specially set up corresponding heating equipment, saving the pole piece assembly cost. On the other hand, while assembling the pole piece, the heating unit 100 heats the pole piece 20, and the two original series processes are carried out in parallel, which can reduce the generation time of the pole piece 20 and improve the production efficiency of the pole piece 20.

[0097] In a possible implementation, the heating unit 100 includes: a first heating element 110 and a second heating element 120 ; wherein there are a plurality of second heating elements 120 .

[0098] Here, the first heating element 110 is disposed on the collection reel 200 ; the plurality of second heating elements 120 are respectively disposed at both ends of the collection reel 200 , and the second heating elements 120 are disposed in a non-contact manner with the collection reel 200 .

[0099] For example, as shown in the figure, the second heating element 120 can be respectively disposed at both ends of the reel collecting shaft 200 .

[0100] It should be understood that the distance between the second heating element 120 and the winding shaft 200 can be determined according to the position offset during the operation of the winding shaft 200. The second heating element 120 should be arranged so as not to affect the winding of the pole piece 20 by the winding shaft 200.

[0101] In one embodiment, the first heating element 110 is a heating rod, which is disposed at the rotation center of the winding shaft.

[0102] In the above implementation process, by arranging the second heating element 120 at both ends of the collection reel 200, the influence of the second heating element 120 on the operation of the collection reel 200 can be reduced, the smoothness of the collection reel 200 winding the pole piece 20 can be improved, and the working efficiency of the pole piece assembly device can be improved.

[0103] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0104] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A pole piece assembly device, characterized in that: include: Pole assembly equipment and heating unit; The pole piece assembly equipment comprises a pole piece supporting unit, and the heating unit is arranged on the pole piece supporting unit; Wherein, the pole piece assembly equipment is configured to assemble the pole piece on the pole piece supporting unit, and the heating unit is configured to heat the pole piece on the pole piece supporting unit.

2. The device according to claim 1, characterized in that The heating unit comprises: a first heating element and a second heating element; The first heating element is arranged on a plane where the pole piece supporting unit supports the pole piece; The second heating element is arranged around the pole piece supporting unit, and an extension plane where the second heating element is located intersects with an extension plane where the pole piece supporting unit is located.

3. The device according to claim 2, characterized in that The first heating element is a heating module, and the heating module is configured to heat the pole piece through contact heat transfer between the pole piece and the heating module; The second heating element is a heat radiation module, and the heat radiation module is configured to heat the pole piece by emitting heat radiation to the surface of the pole piece.

4. The device according to claim 3, characterized in that The first heating element is a heating plate, and the heating plate is arranged on a side of the electrode support unit close to the electrode or the heating plate is arranged on a side of the electrode support unit away from the electrode; or, The first heating element is a heating resistor, and the heating resistor is integrated inside the pole piece supporting unit.

5. The device according to any one of claims 1 to 4, characterized in that: Also includes: Temperature detection unit; The temperature detection unit is disposed on the pole piece supporting unit, and the temperature detection unit is configured to detect the pole piece temperature.

6. The device according to claim 5, characterized in that Also includes: Controller; The controller is connected to the temperature detection unit and the heating unit; The temperature detection unit is configured to send the pole piece temperature to the controller; the controller is configured to adjust the heating mode of the heating unit when the pole piece temperature exceeds a temperature threshold and / or the pole piece temperature heating rate exceeds a heating threshold.

7. The device according to claim 1, characterized in that The pole piece assembly equipment is a cutting and stacking machine, and the pole piece support unit is a storage table; The heating unit is arranged on the storage table; Wherein, the cutting and stacking machine is configured to cut and stack the battery cell pole pieces on the storage table, and the heating unit is configured to heat the pole pieces placed on the storage table.

8. The device according to claim 7, characterized in that The heating unit comprises: a first heating element and a second heating element; wherein the second heating element is a plurality of elements; The first heating element is arranged on the storage table; A plurality of the second heating elements are respectively arranged on both sides of the storage platform along the transmission direction of the pole piece; Wherein, the second heating element is oblique to the plane where the first heating element is located.

9. The device according to claim 1, characterized in that The pole piece assembly equipment is a winding machine, and the pole piece support unit is a winding shaft; The heating unit is arranged on the reel collecting shaft; Wherein, the electrode sheet assembly equipment is configured to alternately wind the positive and negative electrode sheets through the collection reel, and the heating unit is configured to heat the electrode sheets wound on the collection reel.

10. The device according to claim 9, characterized in that The heating unit comprises: a first heating element and a second heating element; wherein the second heating element is a plurality of elements; The first heating element is arranged on the winding shaft; A plurality of the second heating elements are respectively arranged at two ends of the collection reel, and the second heating elements are arranged in a non-contact manner with the collection reel.

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