Air nozzle, coating and drying device, pole piece manufacturing equipment and battery production system

Abstract

The invention discloses an air nozzle, a coating and drying device, pole piece manufacturing equipment and a battery production system. The tuyere comprises a tuyere body, a cavity is formed in the tuyere body, a first air outlet is formed in the tuyere body, the first air outlet is communicated with the cavity, and the first air outlet is used for blowing air to the pole piece; the auxiliary blowing device is arranged on the tuyere body, a second air outlet is formed in the auxiliary blowing device, the second air outlet is used for blowing air to the pole piece, and the first air outlet and the second air outlet are located on the same side of the tuyere body. When the pole piece is dried, high-temperature and low-humidity air can be introduced into the first air outlet to dry the pole piece, low-temperature and high-humidity air can be introduced into the second air outlet to dry the local position of the pole piece, and the low-temperature and high-humidity air can reduce drying of the pole piece. Air with different humidity and temperature is introduced into the first air outlet and the second air outlet, so that the drying rate consistency of different positions of the pole piece can be improved.

Description

Technical Field

[0001] The present application relates to a battery manufacturing device, and specifically to an air nozzle, a coating and drying device, a pole piece manufacturing device and a battery production system. Background Art

[0002] After the electrode is coated, a coating and drying device is required to dry the electrode. The air nozzle of the coating and drying device blows air to dry the electrode at inconsistent drying rates, which can easily cause cracking of the electrode coating layer (the layer formed by the slurry) or poor uniformity of the coating layer, thus affecting the performance of the battery. Summary of the invention

[0003] In view of the above problems, the present application provides a blast nozzle, a coating and drying device, a pole piece manufacturing equipment and a battery production system. The blast nozzle can change the local drying rate of the pole piece, thereby improving the consistency of the drying rate at different positions of the pole piece.

[0004] In a first aspect, the present application provides a tuyere, comprising:

[0005] The air nozzle body has a cavity formed inside, and a first air outlet is formed on the air nozzle body, the first air outlet is connected with the cavity, and the first air outlet is used to blow air toward the pole piece;

[0006] The auxiliary blowing device is arranged on the nozzle body, and is formed with a second air outlet, which is used for blowing air toward the pole piece, and the first air outlet and the second air outlet are located on the same side of the nozzle body.

[0007] When drying the electrode piece, high temperature and low humidity air can be introduced into the first air outlet to dry the electrode piece. The high temperature and low humidity air of the first air outlet will accelerate the drying of the electrode piece. When the first air outlet dries the electrode piece and the drying rate of a local position of the electrode piece is too fast, low temperature and high humidity air can be introduced into the second air outlet to dry the local position of the electrode piece. The low temperature and high humidity air will reduce the drying of the electrode piece. When the drying of a local position of the electrode piece is too slow, high temperature and low humidity air can also be introduced into the second air outlet to accelerate the drying of the electrode piece. Therefore, by introducing air with different humidity and temperature into the first air outlet and the second air outlet, the consistency of the drying rate of different positions of the electrode piece can be improved.

[0008] In some embodiments, the auxiliary blowing device comprises:

[0009] The adjusting component is adjustable in position relative to the nozzle body along the length direction of the first air outlet, and the adjusting component forms a second air outlet.

[0010] Thus, the second air outlet can be used to dry different positions of the electrode, thereby adjusting the drying rate of different positions of the electrode. Compared with the method in which the position of the adjustment component relative to the nozzle body is not adjustable, the position of the second air outlet can be adjusted in time according to the drying rate of different positions of the electrode, thereby further improving the consistency of the drying rate of different positions of the electrode. In particular, when drying local areas of electrode pieces of different specifications, by adjusting the relative position of the adjustment component and the nozzle body, the drying rate of local areas of electrode pieces of different specifications can be adjusted more conveniently.

[0011] In some embodiments, the adjustment component includes a wind shield and a connecting member, the connecting member is provided with a wind hole for blowing air out through part of the first air outlet, the wind shield is connected to the connecting member, the wind shield is used to open and close the wind hole, the position of the connecting member relative to the nozzle body along the length direction of the first air outlet is adjustable, and the connecting member forms a second air outlet.

[0012] When the first air outlet dries the electrode piece and there is a local area where the drying rate is too fast, the wind shield closes the air hole and shields the area where the drying rate is too fast through the wind shield to reduce the drying rate of the area; at the same time, the second air outlet blows low-temperature and high-humidity air into the area where the drying rate is too fast, which can further reduce the area where the drying rate is too fast. When the drying rate of a local area of ​​the electrode piece is too slow, the adjustment component can be moved to make the wind shield avoid the area where the drying rate is too slow, or the air hole can be opened or opened so that part of the wind from the first air outlet can be blown to the electrode piece through the air hole to increase the drying rate of the area.

[0013] In some embodiments, the wind shield is detachably connected to the connecting member.

[0014] When the drying rate of a local area of ​​the pole piece is too slow, the wind shield can be removed without moving the adjustment component, so that the first air outlet can normally dry the area with too slow drying rate; at the same time, high-temperature and low-humidity air can be introduced into the second air outlet to speed up the drying rate of the area. The wind shield is detachably connected to the connecting member, which can more flexibly adjust the drying rate of the local area of ​​the pole piece.

[0015] In some embodiments, the adjustment component is slidably connected to the nozzle body, and the adjustment component can move relative to the nozzle body along the length direction of the first air outlet.

[0016] Compared with the method of setting multiple installation positions on the nozzle body to realize the position adjustment of the adjustment component on the nozzle body along the length direction of the first air outlet, the adjustment component is slidably connected to the nozzle body along the length direction of the first air outlet, which makes it more convenient to realize the real-time movement of the adjustment component to adjust the drying rate of the local position of the electrode, thereby facilitating operation.

[0017] In some embodiments, there are multiple adjustment components, which are arranged along the length direction of the first air outlet.

[0018] In this way, the drying rate of multiple positions of the electrode can be adjusted.

[0019] In some embodiments, the auxiliary blowing device also includes an air supply pipeline assembly, which is connected to the second air outlet and is used to supply air to the second air outlet.

[0020] The air supply pipeline assembly can supply air of different temperatures and humidities to the second air outlet to adjust the drying rate of the local position of the electrode.

[0021] In some embodiments, the air supply duct assembly includes:

[0022] A first air supply pipe is arranged on the air nozzle body and is connected to the second air outlet;

[0023] The air volume regulating valve is arranged on the first air supply pipe and is used for regulating the air volume of the second air outlet.

[0024] The air volume regulating valve can change the air volume of the second air outlet, so as to more accurately adjust the drying rate of the local position of the electrode.

[0025] In some embodiments, a pressure balance chamber is formed inside the nozzle body, and the pressure balance chamber passes through at least one end of the nozzle body along the length direction of the first air outlet. An air vent connected to the pressure balance chamber is formed on the surface of the nozzle body on one side of the second air outlet.

[0026] The airflow blown toward the pole piece from the first air outlet and the second air outlet will flow into the pressure balance chamber from the air vents and flow out from the two ends of the pressure balance chamber. The pressure balance chamber can balance the airflow distribution around the pole piece, so that the wind can be blown onto the pole piece more evenly, so as to improve the consistency of the drying rate at various positions of the pole piece.

[0027] In the second aspect, the present application provides a coating and drying device, comprising an oven and at least one air nozzle of the first aspect, a drying channel is formed inside the oven, at least one air nozzle is arranged in the oven, and the first air outlet and the second air outlet are both arranged toward the drying channel.

[0028] Since the coating and drying device includes all the technical features of the air nozzle of the first aspect, the effects are the same as those described above and will not be described in detail here.

[0029] In the third aspect, the present application provides a pole piece manufacturing equipment, comprising a coating device and a coating and drying device of the second aspect, wherein the coating device is used to coat the slurry on the surface of the pole piece, and the drying device is used to dry the slurry on the surface of the pole piece.

[0030] Since the electrode manufacturing equipment includes all the technical features of the coating and drying device of the second aspect, the effects are the same as those described above and will not be repeated here.

[0031] In a fourth aspect, the present application provides a battery production system, comprising a pole piece manufacturing device according to the third aspect, wherein the pole piece manufacturing device is used to manufacture pole pieces.

[0032] Since the pole piece manufacturing equipment includes all the technical features of the pole piece manufacturing equipment of the third aspect, the effects are the same as those described above and will not be repeated here.

[0033] Since the coating device includes all the technical features of the coating and drying device of the second aspect, the effects are the same as those described above and will not be described in detail here.

[0034] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0036] Figure 1 This is an axonometric diagram of a tuyere according to an embodiment of the present application;

[0037] Figure 2 A side view of a tuyere according to an embodiment of the present application;

[0038] Figure 3 for Figure 2 AA section view;

[0039] Figure 4 This is a schematic diagram of an air supply pipeline assembly of an air nozzle according to an embodiment of the present application;

[0040] Figure 5 This is an axonometric view of a connecting piece of a tuyere according to an embodiment of the present application;

[0041] Figure 6 This is a schematic diagram of a wind nozzle blowing air toward a pole piece according to an embodiment of the present application;

[0042] Figure 7 It is a cross-sectional view of a coating and drying device according to an embodiment of the present application.

[0043] The reference numerals in the specific implementation manner are as follows:

[0044] 100, air nozzle; 10, air nozzle body; 11, pressure balance chamber; 12, first air outlet; 13, guide structure; 14, air vent; 15, cavity; B, length direction of first air outlet; 20, auxiliary blowing device; 21a, second air outlet; 21, adjustment component; 211, wind shield; 212, connector; 212a, air hole; 22, air supply pipeline component; 221, first air supply pipe; 222, air volume regulating valve; 223, hose; 224, second air supply pipe; 30, pole piece;

[0045] 200, oven; 201, drying channel; C, conveying direction;

[0046] 300, first air chamber;

[0047] 400. Second air chamber. DETAILED DESCRIPTION

[0048] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0050] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0051] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0052] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0053] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0054] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0055] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like 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, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0056] After the electrode is coated, a coating and drying device is required to dry the electrode. The drying rate of the nozzle of the coating and drying device is inconsistent when blowing air to dry the electrode, which can easily cause the coating layer (slurry layer) of the electrode to crack or the coating layer to have poor uniformity, thus affecting the performance of the battery. For example, in the manufacturing process of some electrode pieces, the thickness of the coating area of ​​the electrode piece may be different. The coating area of ​​the electrode piece is divided into a main area and an edge area. The two sides of the main area are edge areas. The thickness of the main area is greater than that of the edge area. When the airflow of the same temperature and humidity is introduced into the main area and the edge area, the drying rate of the edge area will be greater than that of the main area, resulting in inconsistent drying rates in different areas of the electrode piece, which can easily cause the coating layer (slurry layer) of the electrode piece to crack or the coating layer to have poor uniformity, thus affecting the performance of the battery.

[0057] In view of this, the present application provides a wind nozzle, wherein a first air outlet is arranged on the wind nozzle body, and a second air outlet is arranged on the auxiliary blowing device. When drying the electrode, high-temperature and low-humidity air can be introduced into the first air outlet to dry the electrode, and the high-temperature and low-humidity air at the first air outlet will accelerate the drying of the electrode. When the first air outlet dries the electrode and there is a local drying rate of the electrode too fast, low-temperature and high-humidity air can be introduced into the second air outlet to dry the local position of the electrode, and the low-temperature and high-humidity air will reduce the drying of the electrode. For example, when the drying rate of the above-mentioned edge area is faster, introducing low-temperature and high-humidity air into the edge area can reduce the drying rate of the edge area; when the local position of the electrode is dried too slowly, high-temperature and low-humidity air can also be introduced into the second air outlet to accelerate the drying of the electrode. For example, the drying rate of the above-mentioned main area is slower than that of the edge area, introducing high-temperature and low-humidity air into the second air outlet can accelerate the drying rate of the main area. Therefore, the consistency of the drying rate at different positions of the electrode sheet can be improved by introducing air with different humidity and temperature into the first air outlet and the second air outlet.

[0058] The air nozzle provided in the present application can dry the coating layer of the pole pieces of different types of batteries.

[0059] The following examples are for ease of explanation. Figure 1-Figure 6 , an air nozzle 100 of the present application is taken as an example for description.

[0060] The air nozzle 100 includes an air nozzle body 10 and an auxiliary blowing device 20. A cavity 15 is formed inside the air nozzle body 10, and a first air outlet 12 is formed on the air nozzle body 10. The first air outlet 12 is connected to the cavity 15, and the first air outlet 12 is used to blow air to the pole piece 30. The auxiliary blowing device 20 is arranged on the air nozzle body 10, and a second air outlet 21a is formed on the auxiliary blowing device 20. The second air outlet 21a is used to blow air to the pole piece 30, and the first air outlet 12 and the second air outlet 21a are located on the same side of the air nozzle body 10.

[0061] The air nozzle body 10 is formed with an air inlet communicated with the air, and dry air can be supplied into the air inlet.

[0062] Optionally, the first air outlet 12 may be a narrow slit, and the narrow slit is communicated with the cavity 15 .

[0063] Optionally, the nozzle body 10 may be a long box structure, and the length direction B of the first air outlet 12 is the same as the length direction of the nozzle body 10 .

[0064] Optionally, the second air outlet 21a includes but is not limited to a long strip air outlet, a circular air outlet or a square air outlet, etc. Exemplarily, the second air outlet 21a is a circular air outlet, and the number of the circular air outlets is multiple, and the multiple circular air outlets can be arranged in a row at intervals.

[0065] The number of the first air outlet 12 of the nozzle body 10 is at least one. Optionally, the number of the first air outlet 12 is two, which are arranged at intervals in the nozzle body 10, and the spacing direction of the two first air outlets 12 can be perpendicular to the length direction B of the first air outlet 12. Optionally, the second air outlet 21a is located between the two first air outlets 12.

[0066] The air outlet direction of the first air outlet 12 and the air outlet direction of the second air outlet 21a can be set according to actual needs.

[0067] When drying the electrode 30, high temperature and low humidity air can be introduced into the first air outlet 12 to dry the electrode 30. The high temperature and low humidity air of the first air outlet 12 will accelerate the drying of the electrode 30. When the first air outlet 12 dries the electrode 30 and the drying rate of a local position of the electrode 30 is too fast, low temperature and high humidity air can be introduced into the second air outlet 21a to dry the local position of the electrode 30. The low temperature and high humidity air will reduce the drying of the electrode 30. When the drying of a local position of the electrode 30 is too slow, high temperature and low humidity air can also be introduced into the second air outlet 21a to accelerate the drying of the electrode 30. Therefore, by introducing air with different humidity and temperature into the first air outlet 12 and the second air outlet 21a, the consistency of the drying rate of different positions of the electrode 30 can be improved.

[0068] In some embodiments, please refer to Figure 1 and Figure 3 The auxiliary blowing device 20 includes an adjusting component 21, the position of the adjusting component 21 relative to the nozzle body 10 along the length direction B of the first air outlet 12 is adjustable, and the adjusting component 21 forms a second air outlet 21a.

[0069] Optionally, a plurality of mounting positions spaced apart along the length direction B of the first air outlet 12 may be provided on the air nozzle body 10, and the adjustment component 21 may be installed at different mounting positions to adjust the blowing position of the adjustment component 21. Each mounting position may be a bolt hole, and the adjustment component 21 may be connected to the bolt hole of any mounting position by a bolt.

[0070] Optionally, the number of the second air outlets 21a of the regulating component 21 is two, the two second air outlets 21a are arranged at intervals, and the two second air outlets 21a are configured so that the air outlet directions thereof intersect.

[0071] Thus, the second air outlet 21a can be used to dry different positions of the pole piece 30, thereby adjusting the drying rate of different positions of the pole piece 30. Compared with the method in which the position of the adjustment component 21 relative to the nozzle body 10 is not adjustable, the position of the second air outlet 21a can be timely adjusted according to the drying rate of different positions of the pole piece 30, thereby further improving the consistency of the drying rate of different positions of the pole piece 30. In particular, when drying local areas of pole pieces 30 of different specifications, by adjusting the relative position of the adjustment component 21 and the nozzle body 10, the drying rate of local areas of pole pieces 30 of different specifications can be adjusted more conveniently.

[0072] In some embodiments, please refer to Figure 1 , Figure 3 and Figure 5 The adjustment component 21 includes a wind shield 211 and a connecting member 212. The connecting member 212 is provided with a wind hole 212a for blowing out air through part of the first air outlet 12. The wind shield 211 is connected to the connecting member 212. The wind shield 211 is used to open and close the wind hole 212a. The connecting member 212 is adjustable in position relative to the nozzle body 10 along the length direction B of the first air outlet 12. The connecting member 212 forms a second air outlet 21a.

[0073] The wind shield 211 is used to open and close the air hole 212a. The wind shield 211 can be disassembled to open or close the air hole 212a, or the wind shield 211 can be moved to open the air hole 212a. Exemplarily, the wind shield 211 can be sleeved on the connecting member 212, and the wind shield 211 can be moved relative to the connecting member 212 to open or close the air hole 212a. In order to maintain the adjusted position of the wind shield 211, a set screw can be provided on the wind shield 211, and the set screw can be threadedly connected to the wind shield, and the end of the set screw can abut against the outer surface of the connecting member 212.

[0074] Optionally, the connecting member 212 includes but is not limited to a connecting plate or a connecting rod.

[0075] Optionally, the wind shield 211 may be a flat structure, which can reduce the probability of the pole piece 30 being scratched during the drying process of the pole piece 30 .

[0076] The wind shield 211 is used to shield a portion of the first air outlet 12 , which means that the wind shield 211 can block a section of the first air outlet 12 or change the wind direction of a section of the first air outlet 12 .

[0077] Optionally, the connecting member 212 may be connected to any bolt hole of the above-mentioned mounting position by means of bolts.

[0078] Optionally, the connecting member 212 is slidably connected to the nozzle body 10 along the length direction B of the first air outlet 12 .

[0079] Optionally, the connecting member 212 forms an air duct, one end of the air duct forms a second air outlet 21a, and the other end of the air duct forms an air inlet. The second air outlet 21a can be a narrow slit structure, and the length direction of the second air outlet 21a can be the same as the length direction B of the first air outlet 12.

[0080] Optionally, the length of the second air outlet 21 a is smaller than the length of the first air outlet 12 .

[0081] When the first air outlet 12 dries the pole piece 30 and there is a local area where the drying rate is too fast, the wind shield 211 closes the air hole 212a, and the wind shield 211 shields the area where the drying rate is too fast to reduce the drying rate of the area; at the same time, the second air outlet 21a blows low-temperature and high-humidity air into the area where the drying rate is too fast, which can further reduce the area where the drying rate is too fast. When the drying rate of a local area of ​​the pole piece 30 is too slow, the adjustment component 21 can be moved to make the wind shield 211 avoid the area where the drying rate is too slow, or open or open the air hole 212a, so that part of the wind from the first air outlet 21a can be blown to the pole piece 30 through the air hole 212a to increase the drying rate of the area.

[0082] In some embodiments, please refer to Figure 3 The wind shield 211 and the connecting member 212 are detachably connected.

[0083] Optionally, the detachable connection between the wind shield 211 and the connecting member 212 includes but is not limited to screw connection, clamping connection or bolt connection, etc.

[0084] Exemplarily, the wind shield 211 may be a baffle, which blocks the air hole 212a and is detachably connected to the connector 212, specifically, it may be connected by screws. When it is necessary to ventilate from the air hole 212a, that is, the first air outlet 12 ventilates from the air hole 212a to the pole piece, the baffle may be removed. Exemplarily, the wind shield 211 includes two snap-fit ​​plates, which are located at both ends of the air hole 212a and block the air hole 212a, and the two plates may clamp the connector 212 by snapping.

[0085] When the drying rate of a local area of ​​the pole piece 30 is too slow, the wind shield 211 can be removed without moving the adjustment component 21, so that the first air outlet 12 can normally dry the area with a slow drying rate; at the same time, high-temperature and low-humidity air can be introduced into the second air outlet 21a to speed up the drying rate of the area. The wind shield 211 is detachably connected to the connecting member 212, so that the drying rate of the local area of ​​the pole piece 30 can be adjusted more flexibly.

[0086] In some embodiments, please refer to Figure 1The adjustment component 21 is slidably connected to the nozzle body 10 , and the adjustment component 21 can move relative to the nozzle body 10 along the length direction B of the first air outlet 12 .

[0087] Optionally, the guide structure 13 on the nozzle body 10 is slidably connected to a slider, and the connecting member 212 is connected to the slider. Specifically, the connecting member 212 can be connected to the slider by screws.

[0088] Optionally, guide rails may be provided on opposite sides of the nozzle body 10, each guide rail is provided with a slider, and both ends of the connecting member 212 are connected to the slider. Providing guide rails on opposite sides of the nozzle body 10 can achieve stable support for the adjustment component 21, and the adjustment of the adjustment component 21 is more flexible.

[0089] Optionally, the nozzle body 10 may be provided with a guide structure 13, such as a guide rail or a guide rod, and the adjustment component 21 may be slidably mounted on the guide structure 13, and the movement direction of the adjustment component 21 relative to the nozzle body 10 is the same as the length direction B of the first air outlet 12.

[0090] Optionally, the nozzle body 10 may be provided with a guide groove extending along the length direction B of the first air outlet 12, and the adjustment component 21 may be provided with a guide protrusion matched with the guide groove. Specifically, guide protrusions may be provided at both ends of the connecting member 212, and the guide protrusions may be slidably provided in the guide groove. Alternatively, the nozzle body 10 may be provided with a guide protrusion extending along the length direction B of the first air outlet 12, and the adjustment component 21 may be provided with a guide groove. Specifically, guide protrusions may be provided at both ends of the connecting member 212, and the guide protrusions may slidably cooperate with the guide groove.

[0091] Compared with the method of setting multiple installation positions on the nozzle body 10 to realize the position adjustment of the adjustment component 21 on the nozzle body 10 along the length direction B of the first air outlet 12, the sliding connection between the adjustment component 21 and the nozzle body 10 along the length direction B of the first air outlet 12 is more convenient to realize the real-time movement of the adjustment component 21 to adjust the drying rate of the local position of the pole piece 30, which is convenient for operation.

[0092] The second connecting member 213 is slidably connected to the nozzle body 10 along the length direction B of the first air outlet 12, and the end of the second connecting member 213 is detachably connected to the wind shield 211, so that both the adjustment component 21 can be adjusted relative to the nozzle body 10 along the length direction B of the first air outlet 12, and the wind shield 211 can be detached to adjust the drying rate of the local position of the pole piece 30.

[0093] In some embodiments, please refer to Figure 1 There are multiple adjustment components 21, and the multiple adjustment components 21 are arranged along the length direction B of the first air outlet 12.

[0094] During the coating process of the pole piece 30, a slurry (such as a mixture of an active material, a conductive agent, an adhesive and a solvent) is coated on the surface of a substrate (such as an aluminum foil) to form a plurality of coating layers arranged at intervals, and the uncoated area between the two coating layers is a pole ear area, and the pole ear area is cut and wound to form a plurality of pole pieces 30, which can improve the production efficiency of the pole piece 30. The number of the adjustment components 21 is multiple, and the drying rate of the local area of ​​the pole piece 30 with multiple coating layers can be adjusted at the same time to improve the consistency of the drying rate of the pole piece 30 with multiple coating layers, and can meet the drying requirements of pole pieces 30 of different specifications in the production process.

[0095] In some embodiments, please refer to Figure 3 and Figure 4 The auxiliary blowing device 20 also includes an air supply pipeline component 22, which is connected to the second air outlet 21a, and the air supply pipeline component 22 is used to supply air to the second air outlet 21a.

[0096] Specifically and optionally, the air supply pipeline assembly 22 can be composed of a pipeline regulating element (such as a valve, etc.), one or more pipelines, etc., and can supply air with different humidity and temperature to the second air outlet 21a, such as high temperature and low humidity air or low temperature and high humidity air.

[0097] The air supply pipeline assembly 22 can supply air of different temperatures and humidities to the second air outlet 21 a to adjust the drying rate of a local position of the electrode piece 30 .

[0098] In some embodiments, please refer to Figure 4 The air supply pipeline assembly 22 includes a first air supply pipe 221 and an air volume regulating valve 222. The first air supply pipe 221 is disposed on the air nozzle body 10 and communicates with the second air outlet 21a. The air volume regulating valve 222 is disposed on the first air supply pipe 221 and is used to adjust the air volume of the second air outlet 21a.

[0099] Optionally, the first air supply pipe 221 is provided with an air supply outlet and an air supply inlet, and the air supply outlet can be connected to the second air outlet 21a through a hose 223. Specifically, the air supply outlet can be connected to the air inlet of the above-mentioned air duct. The hose 223 can be set with a reserved length so that the first air supply pipe 221 can be connected to the second air outlet 21a when the adjustment component 21 moves.

[0100] Optionally, the air supply pipeline assembly 22 further includes a second air supply pipe 224 , and the second air supply pipe 224 is connected to the first air supply pipe 221 .

[0101] Optionally, the first air supply pipe 221 can be arranged in the pressure balance chamber 11, and the second air supply pipe 224 penetrates into the cavity 15 from the bottom of the nozzle body 10, and penetrates into the pressure balance chamber 11 from the cavity 15 to communicate with the first air supply pipe 221. In other embodiments, the first air supply pipe 221 and the second air supply pipe 224 can also be arranged outside the nozzle body 10.

[0102] The air volume regulating valve 222 can change the air volume of the second air outlet 21 a, so as to more accurately adjust the drying rate of a local position of the electrode piece 30 .

[0103] Providing two first air outlets 12 on the nozzle body 10 can further improve the overall drying rate of the pole piece 30 , and can also reduce the migration amount of the coating layer of the pole piece 30 during the drying process, thereby improving the uniformity of the coating layer on the surface of the pole piece 30 .

[0104] In some embodiments, please refer to Figure 1 and Figure 3 A pressure balance chamber 11 is formed inside the nozzle body 10, and the pressure balance chamber 11 penetrates at least one end of the nozzle body 10 along the length direction B of the first air outlet 12. The nozzle body 10 has an air vent 14 connected to the pressure balance chamber 11 formed on the surface of one side of the second air outlet 21a.

[0105] Optionally, the number of the first air outlets 12 is two, and the pressure balance chamber 11 is located between the two first air outlets 12 .

[0106] Optionally, the air vent 14 may be in the shape of an elongated strip.

[0107] The first air supply pipe 221 can be arranged in the pressure balance chamber 11, or can be arranged outside the air nozzle body 10. Optionally, the first air supply pipe 221 is arranged in the pressure balance chamber 11, and the soft tube passes through the air vent 14 and communicates with the air inlet of the air duct.

[0108] The airflow blown toward the pole piece 30 from the first air outlet 12 and the second air outlet 21a will flow into the pressure balance chamber 11 from the air vents and flow out from the two ends of the pressure balance chamber 11. The pressure balance chamber 11 can balance the airflow distribution around the pole piece 30, so that the wind can be blown onto the pole piece 30 more evenly, so as to improve the consistency of the drying rate at various positions of the pole piece 30.

[0109] Thus, the drying rate of the to-be-dried area of ​​the electrode piece 30 corresponding to the two second air outlets 21 a can be changed.

[0110] The following examples are for convenience of description. Figure 6 and Figure 7 , taking the coating and drying device of the present application as an example for explanation.

[0111] A coating and drying device includes an oven 200 and at least one of the above-mentioned air nozzles 100. A drying channel 201 is formed inside the oven 200. At least one air nozzle 100 is arranged in the oven 200, and the first air outlet 12 and the second air outlet 21a are both arranged toward the drying channel 201.

[0112] Optionally, a first air chamber 300 and a second air chamber 400 are provided in the oven 200, wherein the first air chamber 300 and the second air chamber 400 are respectively connected to at least one air nozzle 100. The first air chamber 300 and the second air chamber 400 can centrally supply air to the air nozzle 100 to keep the air pressure stable.

[0113] Optionally, a conveying roller for conveying the electrode 30 is further provided in the oven 200. The electrode 30 is sent to the coating and drying device after coating, and is sent out from the coating and drying device through the conveying roller. The coating and drying of the electrode 30 can be achieved simultaneously to improve production efficiency.

[0114] Optionally, the conveying direction C of the pole piece 30 may be perpendicular to the length direction B of the first air outlet 12, and the two may also be arranged at an angle less than 90°, which may be specifically arranged according to actual needs.

[0115] Since the coating and drying device includes all the technical features of the air nozzle 100 of the above embodiment, the effects are the same as those described above and will not be described in detail here.

[0116] For the convenience of explanation, the following embodiments are described by taking the pole piece 30 manufacturing equipment of the present application as an example.

[0117] The manufacturing equipment of the pole piece 30 includes a coating device and the coating and drying device of the above embodiment. The coating device is used to coat the slurry on the surface of the pole piece 30 , and the drying device is used to dry the slurry on the surface of the pole piece 30 .

[0118] The coating device is a device that can evenly apply the slurry (active material) to the substrate, that is, the electrode 30. The coating and drying device 10 is a device that can quickly dry the slurry on the electrode 30.

[0119] Since the pole piece 30 manufacturing equipment includes all the technical features of the coating and drying device of the above embodiment, the effects are the same as those described above and will not be repeated here.

[0120] For the convenience of description, the following embodiments are described by taking the battery production system of the present application as an example.

[0121] The battery production system includes a pole piece 30 manufacturing device according to the above embodiment, and the pole piece 30 manufacturing device is used to manufacture the pole piece 30 .

[0122] Since the pole piece 30 manufacturing equipment includes all the technical features of the pole piece 30 manufacturing equipment of the above embodiment, the effects are the same as those described above and will not be repeated here.

[0123] The following examples are for convenience of description. Figure 1-Figure 6 , the pole piece 30 manufacturing equipment of the present application is taken as an example for explanation.

[0124] The air nozzle 100 includes an air nozzle body 10 and an auxiliary blowing device 20. A cavity 15 is formed inside the air nozzle body 10, and a first air outlet 12 is formed on the air nozzle body 10. The first air outlet 12 is connected to the cavity 15, and the first air outlet 12 is used to blow air to the pole piece 30. The auxiliary blowing device 20 is arranged on the air nozzle body 10, and the auxiliary blowing device 20 includes an air supply pipeline component 22 and a plurality of adjustment components 21. The plurality of adjustment components 21 are arranged along the length direction B of the first air outlet 12. The adjusting component 21 includes a wind shield 211 and a connecting member 212. The connecting member 212 is provided with an air hole 212a for blowing out air through part of the first air outlet 12. The wind shield 211 is connected to the connecting member 212. The wind shield 211 is used to open and close the air hole 212a. The connecting member 212 is slidably connected to the air nozzle body 10, and the connecting member 212 can move relative to the position of the air nozzle body 10 along the length direction B of the first air outlet 12. The connecting member 212 forms a second air outlet 21a, and the second air outlet 21a is used to blow air toward the pole piece 30. The first air outlet 12 and the second air outlet 21a are located on the same side of the air nozzle body 10.

[0125] A pressure balance chamber 11 is formed inside the nozzle body 10, and the pressure balance chamber 11 penetrates at least one end of the nozzle body 10 along the length direction B of the first air outlet 12. The nozzle body 10 has an air vent 14 connected to the pressure balance chamber 11 formed on the surface of one side of the second air outlet 21a.

[0126] When drying the electrode 30, high temperature and low humidity air can be introduced into the first air outlet 12 to dry the electrode 30. The high temperature and low humidity air of the first air outlet 12 will accelerate the drying of the electrode 30. When the first air outlet 12 dries the electrode 30, if the drying rate of a local position of the electrode 30 is too fast, low temperature and high humidity air can be introduced into the second air outlet 21a to dry the local position of the electrode 30. The low temperature and high humidity air will reduce the drying of the electrode 30. When the local position of the electrode 30 is dried too slowly, high temperature and low humidity air can also be introduced into the second air outlet 21a to accelerate the drying of the electrode 30. Therefore, the consistency of the drying rate of different positions of the electrode 30 can be improved by introducing air with different humidity and temperature into the first air outlet 12 and the second air outlet 21a. There are multiple adjustment components 21, and the connecting member 212 of the adjustment component 21 is slidably connected to the nozzle body 10, which can adjust the drying rate of the local area of ​​the pole piece 30 of different specifications to provide consistency of the drying rate of different positions of the pole piece 30. The wind shield 211 is used to open and close the air hole 212a to change the wind direction of part of the first air outlet 12, which can reduce the drying rate of the local position of the pole piece 30. By changing the opening of the air volume regulating valve 222, the drying rate of the second air outlet 21a can be increased or reduced. The wind shield 211 and the air volume regulating valve 222 can more conveniently adjust the drying rate of the local position of the pole piece 30.

[0127] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A tuyere, characterized in that: include: A nozzle body, wherein a cavity is formed inside the nozzle body, and a first air outlet is formed on the nozzle body, wherein the first air outlet is connected to the cavity, and the first air outlet is used to blow air toward the pole piece; An auxiliary blowing device is arranged on the nozzle body, and the auxiliary blowing device forms a second air outlet, and the second air outlet is used to blow air toward the pole piece, and the first air outlet and the second air outlet are located on the same side of the nozzle body.

2. The air nozzle according to claim 1, characterized in that: The auxiliary blowing device comprises: The adjusting component is adjustable in position relative to the nozzle body along the length direction of the first air outlet, and the adjusting component forms the second air outlet.

3. The air nozzle according to claim 2, characterized in that: The adjustment component includes a wind shield and a connecting member, the connecting member is provided with a wind hole for blowing out air through part of the first air outlet, the wind shield is connected to the connecting member, the wind shield is used to open and close the wind hole, the position of the connecting member relative to the nozzle body along the length direction of the first air outlet is adjustable, and the connecting member forms the second air outlet.

4. The air nozzle according to claim 3, characterized in that: The wind shielding member is detachably connected to the connecting member.

5. The air nozzle according to any one of claims 1 to 4, characterized in that: The adjusting component is slidably connected to the nozzle body, and the adjusting component can move relative to the nozzle body along the length direction of the first air outlet.

6. The air nozzle according to any one of claims 1 to 5, characterized in that: There are multiple adjustment components, and the multiple adjustment components are arranged along the length direction of the first air outlet.

7. The air nozzle according to any one of claims 1 to 6, characterized in that: The auxiliary blowing device also includes an air supply pipeline assembly, which is connected to the second air outlet and is used to supply air to the second air outlet.

8. The air nozzle according to claim 7, characterized in that: The air supply pipeline assembly comprises: A first air supply pipe, disposed on the air nozzle body and connected to the second air outlet; An air volume regulating valve is arranged on the first air supply pipe and is used to adjust the air volume of the second air outlet.

9. The air nozzle according to any one of claims 1 to 8, characterized in that: A pressure balance chamber is formed inside the nozzle body, and the pressure balance chamber passes through at least one end of the nozzle body along the length direction of the first air outlet. An air vent connected to the pressure balance chamber is formed on the surface of the nozzle body on one side of the second air outlet.

10. A coating and drying device, characterized in that: The coating and drying device comprises at least one air nozzle according to any one of claims 1 to 9, and the coating and drying device further comprises at least one air nozzle of an oven, a drying channel is formed inside the oven, the at least one air nozzle is arranged in the oven, and the first air outlet and the second air outlet are both arranged toward the drying channel.

11. A pole piece manufacturing device, characterized in that: It comprises a coating device and a coating and drying device as claimed in claim 10, wherein the coating device is used to coat the slurry on the surface of the pole piece, and the drying device is used to dry the slurry on the surface of the pole piece.

12. A battery production system, characterized in that: It includes the pole piece manufacturing equipment as described in claim 11, and the pole piece manufacturing equipment is used to manufacture the pole piece.

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