CN117219725A

CN117219725A - Pole piece surface treatment device and process, pole piece production equipment and battery production line

Info

Publication number: CN117219725A
Application number: CN202311477834.7A
Authority: CN
Inventors: 刘明健; 王寒; 冯涛; 李克强; 郭超
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2023-11-08
Filing date: 2023-11-08
Publication date: 2023-12-12

Abstract

The application relates to a pole piece surface treatment device and a process, pole piece production equipment and a battery production line, wherein the pole piece surface treatment device is provided with an accommodating space for accommodating a pole piece, and comprises an instantaneous operation state, wherein the instantaneous operation state is a state capable of enabling the temperature in the accommodating space to reach a preset temperature within a preset time to heat the pole piece; wherein the preset time is less than or equal to 1s. According to the application, the pole piece is placed in the accommodating space, the pole piece surface treatment device can treat the pole piece in an instantaneous operation state, so that the pole piece surface treatment device can quickly reach a preset temperature, the accommodating space can reach an instantaneous high temperature, burrs on the surface of the pole piece can be smoothly melted under the condition of the preset temperature, and the burrs on the surface of the pole piece can be removed; in addition, through controlling preset time and preset temperature, the burrs on the surface of the pole piece can be removed rapidly, efficiency is improved, and meanwhile the probability of oxidization of the surface of the pole piece is reduced.

Description

Pole piece surface treatment device and process, pole piece production equipment and battery production line

Technical Field

The application relates to the technical field of batteries, in particular to a pole piece surface treatment device and process, pole piece production equipment and a battery production line.

Background

In the manufacturing process of the battery, the pole piece is required to be subjected to cutting, die cutting, winding or lamination and other treatments, burrs can be formed on the surface of the pole piece in the treatment process, and the probability of short circuit or thermal runaway of the battery can be improved by the burrs.

Therefore, the surface of the pole piece needs to be treated to remove burrs on the pole piece surface. However, in the current process of processing burrs on the surface of the pole piece, the processing time is long, the efficiency is low, and the long-time processing can also lead to oxidation of the surface of the pole piece, which is not beneficial to maintaining the stability of the pole piece structure.

Disclosure of Invention

Based on the above, it is necessary to provide a pole piece surface treatment device and process, pole piece production equipment and battery production line, aiming at the problems that the existing pole piece surface treatment process is low in efficiency and oxidation of the pole piece surface is easy to cause.

In a first aspect, the present application provides a pole piece surface treatment device, the pole piece surface treatment device having an accommodating space for accommodating a pole piece, the pole piece surface treatment device including an instantaneous operating state, the instantaneous operating state being a state in which a temperature in the accommodating space can reach a preset temperature within a preset time to heat the pole piece; wherein the preset time is less than or equal to 1s.

Through the structure, when the pole piece is placed in the accommodating space, the pole piece can be rapidly heated under the instantaneous operation state through the pole piece surface treatment device, so that the instantaneous high temperature can be formed in the accommodating space and acts on the pole piece. On the one hand, burrs on the surface of the pole piece can be melted under the action of instantaneous high temperature, so that the purpose of removing the burrs is realized. On the other hand, the high-temperature treatment time of the pole piece can be greatly shortened, the probability of oxidization of the non-film-coated area on the pole piece is effectively reduced, and the overall structure of the pole piece is more stable. In addition, through the treatment of instantaneous high temperature, can also carry out the modification to the polar plate surface, release the elastic deformation of pole piece in advance for the polar plate is more stable in the subsequent equipment forms the single course of working of battery.

In some embodiments, the preset temperature ranges from 300 ℃ to 800 ℃.

Therefore, the pole piece surface treatment device has short heating time in the instantaneous running state, can quickly reach instantaneous high temperature, improves the deburring effect, improves the modification effect on the pole piece, and can further reduce the oxidation probability of an uncoated area on the pole piece.

In some embodiments, the pole piece surface treatment device comprises at least two operation components arranged at intervals along the first direction, wherein each two adjacent operation components are spaced to form a containing space;

Each operation assembly is used for inputting combustible gas into the corresponding accommodating space and igniting;

when the pole piece is arranged in the accommodating space, the thickness direction of the pole piece is parallel to the first direction.

Through setting up the mode of operating unit to the combustible gas of input in to accommodation space and igniting, can make accommodation space obtain instantaneous high temperature in the short time, act on the pole piece, effectively get rid of the burr on the pole piece to can also carry out the modification through high Wen Duiji piece, release the elastic deformation of pole piece self.

In some embodiments, each operation assembly includes a main body and a gas injection member, an accommodating space is formed between every two adjacent main bodies, and the gas injection member is disposed on the corresponding main body and is used for injecting a combustible gas into the corresponding accommodating space.

Through setting up the main part, can enclose the pole piece better and locate accommodation space in, then spout combustible gas to accommodation space in through the injection member for combustible gas more even packing in the clearance between pole piece and the main part that corresponds, from this, the flame that forms after the combustible gas fires can more even act on the pole piece.

In some embodiments, the jet has a jet opening that opens toward the receiving space, and the jet opening has a caliber of 50mm-1000mm.

Through the structure, the combustible gas can be smoothly sprayed into the accommodating space, and can be quickly and uniformly filled in the gap between the pole piece and the adjacent main body, so that the combustible gas can be conveniently ignited subsequently, and flame is formed to remove burrs on the pole piece.

In some embodiments, each operating assembly further comprises a shield disposed on the main body, the shield being disposed between the main body and the corresponding pole piece along the first direction, and the jet being disposed between the shield and the corresponding main body;

the shielding piece is used for shielding a part of the area on the pole piece, so that the flammable gas after ignition only acts on the area, which is not shielded, on the pole piece.

By arranging the shielding piece, shielding can be formed on the non-film-coated area on the pole piece, so that the flammable gas after ignition only acts on the film-coated area on the pole piece, thereby reducing the influence of high temperature on the structure of the non-film-coated area on the pole piece and reducing the probability of oxidization of the non-film-coated area on the pole piece.

In some embodiments, each shutter is removably disposed on the corresponding body. Each shielding piece is detachably arranged on the corresponding main body, and the compatibility of the pole piece surface treatment device to pole pieces of different specifications can be realized by disassembling and assembling different shielding pieces, so that the shielding pieces can effectively shield the non-film-coated areas of the pole pieces.

In some embodiments, each of the shutters includes a sub-member disposed at opposite ends of the corresponding body along a second direction, respectively, and the second direction intersects the first direction;

wherein, the width direction of the pole piece accommodated in the corresponding accommodating space is set along the second direction.

Through setting up the sub-piece that is located the main part relative both ends respectively along the second direction, can shelter from the protection simultaneously to the uncoated region at the width direction both ends of pole piece simultaneously, reduce the pole piece and do not coat the probability that the region takes place oxidation under the high temperature effect.

In some embodiments, each operating assembly further comprises a pilot member disposed on the corresponding body, at least a portion of the pilot member extending into the receiving space and for igniting the combustible gas in the receiving space.

By controlling the ignition piece, the ignition time of the combustible gas and the formation time of the flame can be accurately controlled, so that the flame can more accurately act on the surface of the pole piece, and the efficiency of deburring and modifying the surface of the pole piece is improved.

In some embodiments, each operating assembly further includes a first drive assembly drivingly connected to the corresponding body, the first drive assembly for driving the corresponding body to move in a first direction to adjust the spacing of the body from the pole piece in the first direction.

Therefore, in the process of driving the corresponding main body to move along the first direction through the first driving assembly, the distance between the main body and the pole piece in the first direction can be adjusted, so that the volume of the combustible gas filled between the main body and the pole piece is adjusted, and burrs on the surface of the pole piece can be removed better by flame formed after the combustible gas is ignited.

In some embodiments, each operating assembly further comprises a second drive assembly drivingly connected to the corresponding body, the second drive assembly for driving the corresponding body to move in a direction parallel to the pole piece.

When the pole piece is placed in the accommodating space, the second screw rod mechanism can be driven to move in the direction parallel to the pole piece, namely, in the width direction of the pole piece through the second driving motor. Therefore, the relative position between the shielding piece and the pole piece can be adjusted, and shielding adjustment is carried out along the width direction of the pole piece, so that the shielding piece can better correspond to an uncoated area on the pole piece.

In some embodiments, the pole piece surface treatment device comprises an induction coil and an electromagnetic induction generator which are connected with each other, wherein the induction coil surrounds to form a containing space, and the electromagnetic induction generator is used for forming current in the containing space through electromagnetic induction and acts on the pole piece.

The induction coil and the electromagnetic induction generator form a high-frequency magnetic field to generate current so as to realize instantaneous heating of the surface of the pole piece, burrs on the surface of the pole piece can be effectively removed, the surface of the pole piece can be modified through instantaneous high temperature, and the elastic deformation of the pole piece is released.

In some embodiments, the number of turns of the induction coil disposed around is 1 turn or more. Therefore, the induction coil can form at least one circle of closed structure in a surrounding mode, when the pole piece penetrates into the containing space formed by the induction coil, burrs can be removed from the surface of the pole piece through instantaneous high temperature, and the surface of the pole piece is modified.

In some embodiments, the pole piece is disposed in the accommodating space in a plane intersecting the direction of the pole piece, and the cross-sectional shape of the induction coil is in a closed loop shape. When the pole piece is arranged in the closed annular containing space in a penetrating way, burrs can be removed from the surface of the pole piece through instantaneous high temperature, and the surface of the pole piece is modified.

In some embodiments, the electromagnetic induction generator has a power of 5KW or more; and/or the frequency of the electromagnetic induction generator is greater than or equal to 20KHz.

By setting the power of the electromagnetic induction generator and the frequency of the electromagnetic induction generator, the instantaneous high temperature can be controlled to be formed in the accommodating space and act on the surface of the pole piece, so that the heating time is shortened, and the probability of oxidization of an uncoated area on the pole piece in a high-temperature environment can be reduced.

In a second aspect, the application also provides pole piece production equipment, which comprises a conveying line and the pole piece surface treatment device, wherein the conveying line is used for conveying the pole piece and driving the pole piece to pass through the accommodating space of the pole piece surface treatment device.

In some embodiments, the pole piece production apparatus further comprises a deviation rectifying mechanism for rectifying the position of the pole piece in the accommodation space.

The position of the pole piece is detected by the deviation correcting sensor, and when the pole piece is detected to deviate along the width direction of the pole piece, the deviation correcting sensor can control the deviation correcting executing mechanism or the controller can control the deviation correcting executing mechanism to adjust the position of the pole piece, so that the pole piece can smoothly move in the conveying process.

In some embodiments, the pole piece production apparatus further comprises a temperature sensor disposed downstream of the pole piece surface treatment device in the conveying direction of the pole piece and configured to detect a surface temperature of the pole piece.

Therefore, the temperature sensor is arranged at the downstream of the pole piece surface treatment device along the conveying direction of the pole piece, so that the surface temperature of the pole piece after high-temperature treatment can be timely detected, the state of the pole piece after surface treatment can be conveniently mastered, and the state can be timely fed back to correspondingly adjust the surface treatment process.

In some embodiments, the pole piece production device further comprises a thickness gauge and a controller, wherein the thickness gauge is arranged at the downstream of the pole piece surface treatment device along the conveying direction of the pole piece and is used for detecting the thickness of the pole piece;

the controller is respectively in communication connection with the thickness gauge, the temperature sensor and the pole piece surface treatment device, and is configured to control the pole piece surface treatment device to adjust the preset temperature in the accommodating space according to the detection results of the thickness gauge and the temperature sensor.

Through setting up thickness gauge, controller and temperature sensor, can carry out the closed loop operation with thickness data, surface temperature data and the pole piece surface treatment device's the default temperature after the pole piece is surface treatment to realize the surface treatment of pole piece better.

In some embodiments, the pole piece production apparatus further comprises a cooling assembly disposed between the temperature sensor and the thickness gauge along the conveying direction of the pole piece and configured to cool the pole piece.

Through setting up cooling module, can make the pole piece after temperature sensor detects surface temperature, carry out quick cooling to the pole piece, make the temperature of pole piece resume to room temperature rapidly, be convenient for follow-up thickness to the pole piece detects, improves thickness detection's accuracy.

In a third aspect, the application provides a battery production line comprising a pole piece production device as described above.

In a fourth aspect, the present application provides a surface treatment process comprising the steps of:

conveying the pole piece along the conveying direction, and enabling the pole piece to penetrate into the accommodating space of the pole piece surface treatment device;

the pole piece surface treatment device is controlled to treat the pole piece in an instantaneous operation state, wherein the instantaneous operation state is a state that the temperature in the accommodating space can reach a preset temperature in a preset time to heat the pole piece.

In some embodiments, the pole piece surface treatment device is controlled to enable the temperature in the accommodating space to reach a preset temperature range of 300-800 ℃ within a preset time of less than or equal to 1 s.

In some embodiments, after the step of controlling the pole piece surface treatment device to treat the pole piece in the transient operating state, the method further comprises the steps of:

controlling a temperature sensor to detect the surface temperature of the pole piece after passing through the pole piece surface treatment device;

controlling a thickness gauge to detect the thickness of the pole piece after passing through the pole piece surface treatment device;

the controller receives the detection results of the temperature sensor and the thickness gauge, and controls the pole piece surface treatment device to adjust the preset temperature in the accommodating space according to the detection results.

In some embodiments, before the step of controlling the thickness gauge to detect the thickness of the pole piece after passing through the pole piece surface treatment device, the method further comprises the steps of:

and controlling the cooling assembly to cool the pole piece after being detected by the temperature sensor.

According to the pole piece surface treatment device and the pole piece surface treatment process, the pole piece production equipment and the battery production line, the pole piece is placed in the accommodating space, the pole piece surface treatment device can be used for treating the pole piece in an instantaneous operation state, the temperature in the accommodating space can be quickly adjusted in a preset time to reach the preset temperature, the accommodating space can reach the instantaneous high temperature, burrs on the surface of the pole piece can be smoothly melted under the condition of the preset temperature, and therefore the burrs on the surface of the pole piece can be removed; in addition, through controlling preset time and preset temperature, the burrs on the surface of the pole piece can be removed rapidly, efficiency is improved, and meanwhile the probability of oxidization of the surface of the pole piece is reduced.

Drawings

Fig. 1 is a schematic structural view of a pole piece surface treatment device according to one or more embodiments.

Fig. 2 is a schematic structural view of a pole piece surface treatment device according to one or more embodiments.

Fig. 3 is a schematic structural view of a pole piece production apparatus according to one or more embodiments.

Fig. 4 is a flow diagram of a pole piece surface treatment method in accordance with one or more embodiments.

Reference numerals illustrate: 1000. pole piece production equipment; 100. a pole piece surface treatment device; 200. a conveying line; 300. a deviation correcting mechanism; 400. a temperature sensor; 500. a thickness gauge; 600. a cooling assembly; 301. a correction sensor; 302. a correction actuating mechanism; 601. an air knife; 602. a water-cooling roller; 10. an accommodation space; 20. an operating assembly; 30. an induction coil; 40. an electromagnetic induction generator; 50. a pole piece; 21. a main body; 22. an air jet member; 23. a shield; 24. a pilot element; 25. a first drive assembly; 26. a second drive assembly; 231. a sub-part; 251. a first driving motor; 252. a first screw mechanism; 261. a second driving motor; 262. a second screw mechanism; a. a first direction; b. a second direction.

The arrow direction in the figure is the conveying direction of the pole piece.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if any, these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., are used herein with respect to the orientation or positional relationship shown in the drawings, these terms refer to the orientation or positional relationship for convenience of description and simplicity of description only, and do not indicate or imply that the apparatus or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

Currently, the application of power batteries is more widespread from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles and other fields. With the continuous expansion of the application field of the power battery, the market demand of the power battery is also continuously expanding.

In the manufacturing process of the battery, the pole piece is required to be punched, and then the punched pole piece is laminated or wound according to the requirement, so that the pole piece can be finally assembled to form the complete battery.

In the process, burrs are easily formed on the surface of the pole piece, and when the battery monomer consisting of the pole piece is coated subsequently, the diaphragm is easily pierced by the burrs on the surface of the pole piece, so that the battery monomer is short-circuited.

Therefore, burrs on the surface of the pole piece are usually removed at present, for example, a hot roller is arranged, and the surface of the pole piece is rolled, so that the burrs on the surface of the pole piece are smoothed under the action of pressure. And if hot air is arranged, blowing the surface of the pole piece, and melting burrs on the surface of the pole piece through the hot air.

However, the highest temperature that can be reached by the hot roller and hot air is limited, and the time required for reaching the highest temperature is long, so that the efficiency of the surface treatment of the pole piece is low. Therefore, in the process of treating the surface of the pole piece in the mode, the burr removing effect is affected, and the surface of the pole piece is heated for a long time, so that the area of the surface of the pole piece, which is not coated with the film, is oxidized.

Based on the above consideration, in order to solve the problems that the efficiency is low and oxidation of the pole piece surface is easy to cause in the current pole piece surface treatment process, one or more embodiments of the present application provide a pole piece surface treatment device, which is capable of placing a pole piece in an accommodating space, treating the pole piece in an instantaneous operation state, rapidly adjusting the temperature in the accommodating space within a preset time to enable the temperature to reach the preset temperature rapidly, enabling the accommodating space to reach an instantaneous high temperature, and smoothly melting burrs on the surface of the pole piece under the condition of the preset temperature, thereby removing burrs on the surface of the pole piece. In addition, through controlling preset time and preset temperature, the burrs on the surface of the pole piece can be removed rapidly, efficiency is improved, and meanwhile the probability of oxidization of the surface of the pole piece is reduced.

Referring to fig. 1 and 2, an embodiment of the present application provides a pole piece surface treatment apparatus 100, where the pole piece surface treatment apparatus 100 has a receiving space 10 for receiving a pole piece 50, and the pole piece surface treatment apparatus 100 includes an instantaneous operation state, wherein the instantaneous operation state is a state capable of enabling a temperature in the receiving space 10 to reach a preset temperature for heating the pole piece within a preset time. Wherein the preset time is less than or equal to 1s.

The pole piece surface treatment device 100 is a device capable of treating a pole piece and removing burrs on the surface of the pole piece. The inside of pole piece surface treatment device 100 is formed with accommodation space 10, when needs carry out surface treatment to the pole piece, places the pole piece in accommodation space 10, then reaches the preset temperature in the preset time through the temperature in pole piece surface treatment device 100 control accommodation space 10 to heat the pole piece in the accommodation space 10 for the burr on pole piece surface melts in the heating process, realizes the effect of deburring.

The instantaneous operating state of the pole piece surface treatment device 100 can raise the temperature in the accommodating space 10 to a higher temperature in a short time, i.e., can enable the accommodating space 10 to be formed with an instantaneous high temperature.

Further, the pole piece after being cut has certain elasticity due to the characteristics of the material of the pole piece. When the pole piece is formed into a battery cell through lamination or winding, the elastic deformation of the pole piece can influence the manufacturing process of the battery cell, and the accuracy of a finally formed battery cell structure is influenced.

The temperature in the accommodating space 10 is increased to the preset temperature in the preset time through the pole piece surface treatment device 100, so that the pole piece in the accommodating space 10 can be rapidly heated in a short time, the surface of the pole piece can be modified under the action of high temperature on the basis of effectively removing burrs on the surface of the pole piece, the elastic deformation of the pole piece can be released in advance, and the structure of the pole piece can be more stable in the processing process of forming the battery monomer in the subsequent assembly.

Through the above structure, when the pole piece is placed in the accommodating space 10, the temperature in the accommodating space 10 can be increased to the preset temperature in the preset time through the pole piece surface treatment device 100, so that the pole piece is rapidly heated, burrs on the surface of the pole piece are rapidly removed, and the efficiency is improved. In addition, due to the fact that the heating time is shortened, the purpose of removing burrs of the pole piece can be achieved in a short time, and the probability of oxidization of the non-film-coated area on the surface of the pole piece can be effectively reduced.

In some embodiments, the preset temperature ranges from 300 ℃ to 800 ℃.

Specifically, when the preset time exceeds 1s, the surface temperature of the pole piece is easily caused to exceed 800 ℃, so that the problems of carbonization of the adhesive or disintegration of the pole piece are caused. Thus, the pole piece surface treatment device 100 can raise the temperature in the accommodation space 10 to 300 ℃ to 800 ℃ in a time of less than or equal to 1 s. In this way, a momentary high temperature can be established in the receiving space 10 and act on the pole piece.

On the one hand, burrs on the surface of the pole piece can be melted under the action of instantaneous high temperature, so that the purpose of removing the burrs is realized. On the other hand, the high-temperature treatment time of the pole piece can be greatly shortened, the probability of oxidization of the non-film-coated area on the pole piece is effectively reduced, and the overall structure of the pole piece is more stable.

In addition, through the treatment of instantaneous high temperature, can also carry out the modification to the polar plate surface, release the elastic deformation of pole piece in advance for the polar plate is more stable in the subsequent equipment forms the single course of working of battery.

As shown in fig. 1, in some embodiments, the pole piece surface treatment device 100 includes at least two operating assemblies 20 spaced apart along the first direction a, each adjacent two operating assemblies 20 being spaced apart to form a receiving space 10. Each operating unit 20 is used for inputting a combustible gas into the corresponding accommodating space 10 and igniting. Wherein, when the pole piece is arranged in the accommodating space 10, the thickness direction of the pole piece is parallel to the first direction a.

Specifically, the pole piece surface treatment device 100 may include a plurality of operating assemblies 20, and the plurality of operating assemblies 20 are arranged at intervals along the first direction a, and one receiving space 10 is formed between every two adjacent operating assemblies 20 at intervals, and each receiving space 10 may be used for receiving one pole piece to be treated.

As a specific example, the pole piece surface treatment device 100 may include two operation members 20 disposed at intervals along the first direction a, the first direction a may be disposed in a horizontal direction, and the two operation members 20 may form the accommodation space 10 at intervals along the first direction a.

When the pole piece is accommodated in the accommodation space 10, the thickness direction of the pole piece is set along the first direction a, and at least one of the two operating assemblies 20 is capable of inputting a combustible gas into the corresponding accommodation space 10 and igniting the combustible gas, thereby forming a flame in the accommodation space 10. The flame has instant high temperature and acts on the surface of the pole piece, so that burrs on the surface of the pole piece can be effectively removed.

In addition, the flame does not need to be in contact with the pole piece, and when the flame is utilized to remove burrs on the pole piece, the burrs on the surface of the pole piece and the edge of the pole piece can be removed at the same time, so that the burrs are removed more thoroughly.

By arranging the operation assembly 20 to input combustible gas into the accommodating space 10 and igniting the combustible gas, the accommodating space 10 can obtain instant high temperature in a short time, acts on the pole piece, effectively removes burrs on the pole piece, and can be modified by a high Wen Duiji piece to release the elastic deformation of the pole piece.

Further, the combustible gas input into the corresponding accommodating space 10 by the operation assembly 20 may be alkane combustible gas, including but not limited to methane, ethane, acetylene, natural gas, etc.

In some embodiments, each operation assembly 20 includes a main body 21 and a gas spraying member 22, where each two adjacent main bodies 21 are separated to form a containing space 10, and the gas spraying member 22 is disposed on the corresponding main body 21 and is used for spraying a combustible gas into the corresponding containing space 10.

Specifically, the body 21 may be provided in a plate-like structure and parallel to the pole pieces. In this way, the two bodies 21 are arranged at intervals along the first direction a and form the accommodation space 10, the pole pieces are placed in the accommodation space 10, the pole pieces are respectively parallel to the two bodies 21 on both sides, and can be better accommodated in the accommodation space 10 formed by the two bodies 21.

The gas injection member 22 is a member capable of injecting a combustible gas into the accommodation space 10, and the gas injection member 22 is provided on the main body 21 and toward the corresponding accommodation space 10. When the pole piece is placed in the accommodating space 10, the combustible gas is injected into the accommodating space 10 through the gas injection member 22, so that the combustible gas can sufficiently flow in the accommodating space 10 and sufficiently fill between the pole piece and the main body 21.

Therefore, when the combustible gas is ignited, the flame formed can act on the pole piece more uniformly, and burrs on the surface of the pole piece are removed smoothly.

Through setting up main part 21, can enclose the pole piece better and locate accommodation space 10 in, then spout combustible gas into accommodation space 10 through the injection member for combustible gas more even fills in the clearance between pole piece and corresponding main part 21, and from this, the flame that forms after the combustible gas fires can more evenly act on the pole piece.

In some embodiments, the jet 22 has jet ports that open toward the receiving space 10 and have a diameter of 50mm-1000mm.

Specifically, the gas ejection port communicates with the accommodation space 10, and the gas ejection member 22 may eject a combustible gas into the accommodation space 10 through the gas ejection port. In addition, the speed and the input quantity of the combustible gas can be adjusted by adjusting the caliber of the air nozzle.

Through the structure, the combustible gas can be smoothly input into the accommodating space 10, and can be rapidly and uniformly filled in the gap between the pole piece and the adjacent main body 21, so that the subsequent ignition of the combustible gas is facilitated, and the flame is formed to remove burrs on the pole piece.

In some embodiments, each operating assembly 20 further comprises a shutter 23 disposed on the body 21, the shutter 23 being disposed between the body 21 and the corresponding pole piece along the first direction a, and the air jet 22 being disposed between the shutter 23 and the corresponding body 21. Wherein the shielding member 23 is used for shielding a part of the area on the pole piece so that the flammable gas after ignition only acts on the area on the pole piece which is not shielded.

In the manufacturing process, the pole piece forms a film coating area and an uncoated area respectively, wherein the film coating area refers to an area coated with the active material layer, the area is formed as a main body 21 part, and the uncoated area refers to an area not coated with the active material layer, the area is a bare pole piece body and is formed as a pole ear part.

When the surface of the pole piece is treated, only the coating area of the surface of the pole piece needs to be treated. And for the uncoated film area on the surface of the pole piece, oxidation is easy to occur in a long-time high-temperature environment, so that the property of the pole piece is affected.

Accordingly, the shutter 23 is provided on the main body 21, and the air jetting member 22 is provided between the shutter 23 and the corresponding main body 21 in the first direction a. After the gas jet member 22 feeds the combustible gas into the gap between the shutter member 23 and the corresponding main body 21, the combustible gas is ignited. At this time, the shielding piece 23 shields the uncoated region on the pole piece, and flame cannot be transferred to the uncoated region on the pole piece under the action of the shielding piece 23, so that the uncoated region on the pole piece is protected.

It will be appreciated that in practical applications, the shape and specific position of the shielding member 23 may be adjusted accordingly according to the area of the pole piece where surface treatment is actually required, so that the shielding member 23 can accurately and effectively shield flame, and thus the surface treatment of the pole piece is more accurate.

By arranging the shielding piece 23, shielding can be formed on the non-film-coated area on the pole piece, so that the flammable gas after ignition only acts on the film-coated area on the pole piece, thereby reducing the influence of high temperature on the structure of the non-film-coated area on the pole piece and reducing the probability of oxidization of the non-film-coated area on the pole piece.

In some embodiments, each shutter 23 is removably disposed on the corresponding body 21.

In practical application, the pole pieces have various shapes and sizes, and correspondingly, the sizes and shapes of the film coating areas and the film non-coating areas on the pole pieces are correspondingly changed.

Each shielding piece 23 is detachably arranged on the corresponding main body 21, and the compatibility of the pole piece surface treatment device 100 to pole pieces of different specifications can be realized by disassembling and assembling different shielding pieces 23, so that the shielding pieces 23 can effectively shield the non-film coating area of the pole pieces.

Further, each shielding piece 23 can be detachably connected with the corresponding main body 21 in a bolt connection manner, and also can be detachably connected with the corresponding main body 21 in a buckle and clamping groove manner, which is not described herein.

In some embodiments, each shutter 23 includes sub-members 231 disposed at opposite ends of the corresponding body 21 along a second direction b, respectively, and the second direction b intersects the first direction a. Wherein the width direction of the pole piece accommodated in the corresponding accommodation space 10 is set along the second direction b.

In the pole piece, generally, the coating film region is formed at the intermediate position in the width direction of the pole piece, and then the opposite ends in the width direction of the pole piece are naturally formed as uncoated regions.

Accordingly, when the pole piece is accommodated in the accommodating space 10, the two sub-members 231 are respectively located at both ends of the main body 21 in the width direction of the pole piece, thereby shielding the uncoated areas at both ends of the pole piece in the width direction, respectively.

Specifically, the sub-members 231 may be formed to extend from both ends of the main body 21 in the second direction b toward the center of the receiving space 10. The extension length of the sub-members 231 is related to the width of the uncoated area of the pole piece and also to the flow rate of the gas ejected from the gas ejection port.

Wherein the greater the width of the uncoated area of the pole piece, the greater the extension length of the sub-member 231 needs to be. And if the flow rate of the gas injected by the gas injection ports is larger, the injection volume of the flame formed after ignition is larger. In order to reduce the probability of flame spraying onto uncoated areas of the pole piece at this time, the extension length of the sub-piece 231 needs to be increased.

It is to be understood that the specific extension length of the sub-component 231 may be adjusted according to the actual situation in the application process, which is not described herein.

By providing the sub-members 231 respectively located at opposite ends of the main body 21 along the second direction b, the uncoated regions at both ends of the pole piece in the width direction can be simultaneously shielded and protected, and the probability of oxidation of the uncoated regions of the pole piece under the action of high temperature is reduced.

In some embodiments, each operating assembly 20 further includes a pilot member 24 disposed on the corresponding body 21, at least a portion of the pilot member 24 extending into the receiving space 10 and for igniting the combustible gas in the receiving space 10.

Specifically, the ignition member 24 may include an ignition electrode provided in the accommodation space 10, and after the gas injection member 22 inputs the combustible gas into the accommodation space 10, the combustible gas is ignited by controlling the ignition electrode to smoothly form a flame.

By controlling the ignition member 24, the time for igniting the combustible gas and forming the flame can be accurately controlled, so that the flame can more accurately act on the surface of the pole piece, and the efficiency of deburring and modifying the surface of the pole piece is improved.

In some embodiments, each operating assembly 20 further includes a first driving assembly 25 drivingly connected to the corresponding main body 21, and the first driving assembly 25 is configured to drive the corresponding main body 21 to move along the first direction a, so as to adjust the distance between the main body 21 and the pole piece in the first direction a.

Specifically, the first driving assembly 25 may include a first driving motor 251 and a first screw mechanism 252, the first screw mechanism 252 is connected between the corresponding main body 21 and the first driving motor 251, and the first driving motor 251 drives the first screw mechanism 252 to move along the first direction a, so as to drive the corresponding main body 21 to move along the first direction a.

Thereby, the width of the accommodation space 10 in the first direction a and the pitch of the pole pieces and the corresponding body 21 in the first direction a can be adjusted by the movement of the body 21 in the first direction a.

Wherein the width of the accommodation space 10 in the first direction a will influence the volume of combustible gas that can be accumulated in the accommodation space 10. The spacing between the pole piece and the corresponding body 21 in the first direction a will affect the volume of combustible gas on both sides of the pole piece in the thickness direction of the pole piece.

Further, the volume of the combustible gas affects the temperature and size of the flame produced.

Therefore, in the process of driving the corresponding main body 21 to move along the first direction a through the first driving assembly 25, the distance between the main body 21 and the pole piece in the first direction a can be adjusted, so that the volume of the combustible gas filled between the main body 21 and the pole piece is adjusted, and the burrs on the surface of the pole piece can be removed better by flame formed after the combustible gas is ignited.

Further, the first driving assembly 25 drives the corresponding body 21 to move in the first direction a by a distance ranging from 5mm to 100mm. Of course, the distance that the first driving component 25 drives the corresponding main body 21 to move in the first direction a may also be adjusted according to specific parameters in practical application, which is not described herein.

In some embodiments, each operating assembly 20 further comprises a second drive assembly 26 drivingly connected to the corresponding body 21, the second drive assembly 26 being configured to drive the corresponding body 21 in a direction parallel to the pole pieces.

Specifically, the second driving assembly 26 may include a second driving motor 261 and a second screw mechanism 262, and the second screw mechanism 262 is connected between the second driving motor 261 and the corresponding main body 21.

When the pole piece is placed in the accommodating space 10, the second screw mechanism 262 can be driven to move in a direction parallel to the pole piece, i.e., in the width direction of the pole piece, by the second driving motor 261. Therefore, the relative position between the shielding piece 23 and the pole piece can be adjusted, and shielding adjustment is carried out along the width direction of the pole piece, so that the shielding piece 23 can better correspond to an uncoated area on the pole piece.

As shown in fig. 2, in some embodiments, the pole piece surface treatment device 100 includes an induction coil 30 and an electromagnetic induction generator 40 connected to each other, the induction coil 30 surrounds the accommodating space 10, and the electromagnetic induction generator 40 is used to form an electric current in the accommodating space 10 by electromagnetic induction and acts on the pole piece.

Specifically, the electromagnetic induction generator 40 is capable of generating an electric current by electromagnetic induction. The induction coil 30 is electrically connected to the electromagnetic induction generator 40, so that a current is formed in the induction coil 30 by a high-frequency magnetic field generated by the electromagnetic induction generator 40.

Further, the induction coil 30 surrounds the accommodating space 10, and the pole piece is arranged in the accommodating space 10 in a penetrating manner, so that the pole piece arranged in the accommodating space 10 can be heated by the current generated on the induction coil 30, and burrs on the surface of the pole piece are melted.

The induction coil 30 and the electromagnetic induction generator 40 form a high-frequency magnetic field to generate current so as to realize instantaneous heating of the surface of the pole piece, effectively remove burrs on the surface of the pole piece, modify the surface of the pole piece at instantaneous high temperature and release elastic deformation of the pole piece.

In some embodiments, the number of turns of the induction coil 30 disposed around is 1 turn or more. Thereby, the induction coil 30 can be surrounded to form at least one circle of closed structure, and when the pole piece is penetrated in the accommodating space 10 formed by the induction coil 30, burrs can be removed from the surface of the pole piece through instantaneous high temperature, and the surface of the pole piece is modified.

In some embodiments, the pole piece is disposed through the accommodating space 10, and the induction coil 30 has a closed ring shape in a cross-section in a plane intersecting the direction of the pole piece.

Specifically, the cross-sectional shape of the induction coil 30 may include, but is not limited to, a closed ring shape such as a rectangle, an ellipse, a perfect circle, etc., so that the pole piece can be better inserted into the accommodating space 10, the surface of the pole piece is smoothly modified, and the elastic deformation of the pole piece is released.

In some embodiments, the electromagnetic induction generator 40 has a power of 5KW or more. And/or the frequency of the electromagnetic induction generator 40 is 20KHz or more.

Specifically, the power of the electromagnetic induction generator 40 is set to be 5KW or more, and the frequency of the electromagnetic induction generator 40 is set to be 20KHz or more, so that the temperature in the accommodating space 10 can be raised to 300 degrees or more in a time of 1s or less, and the removal of burrs on the pole piece surface and the modification of the pole piece surface can be smoothly realized.

By setting the power of the electromagnetic induction generator 40 and the frequency of the electromagnetic induction generator 40, the instantaneous high temperature formed in the accommodating space 10 can be controlled, and the heating time is shortened by acting on the surface of the pole piece, so that the probability of oxidization of the uncoated area on the pole piece in a high-temperature environment can be reduced.

Referring to fig. 3, based on the same concept as the pole piece surface treatment device 100, the present application further provides a pole piece production apparatus 1000, which includes a conveying line 200 and the pole piece surface treatment device 100, wherein the conveying line 200 is used for conveying the pole piece and driving the pole piece to pass through the accommodating space 10 of the pole piece surface treatment device 100.

Specifically, the conveying line 200 may be, but not limited to, set as rollers, sequentially wind the pole pieces between the rollers, and drive the pole pieces to move along the conveying direction by rotating the rollers, thereby realizing the transportation process of the pole pieces.

The conveying line 200 drives the pole piece to penetrate through the accommodating space 10 of the pole piece surface treatment device 100 in the process of conveying the pole piece, so that the pole piece can be subjected to instantaneous high-temperature deburring in the accommodating space 10, the surface of the pole piece is modified, and the elastic deformation of the pole piece is released.

In some embodiments, pole piece production apparatus 1000 further includes a deviation rectifying mechanism 300, and deviation rectifying mechanism 300 is configured to rectify the position of the pole piece within receiving space 10.

Specifically, the deviation rectifying mechanism 300 includes a deviation rectifying sensor 301 and a deviation rectifying executing mechanism 302, wherein the deviation rectifying sensor 301 is disposed upstream of the deviation rectifying executing mechanism 302 along the conveying direction of the pole piece.

The position of the pole piece is detected by the deviation correcting sensor 301, and when the pole piece is detected to deviate along the width direction of the pole piece, the deviation correcting sensor 301 can control the deviation correcting executing mechanism 302 or control the deviation correcting executing mechanism 302 to adjust the position of the pole piece by a controller, so that the pole piece can smoothly move in the conveying process.

The deviation correcting sensor 301 may be, but not limited to, an infrared sensor, the deviation correcting executing mechanism 302 may be, but not limited to, a deviation correcting roller, the position of the pole piece along the width direction of the pole piece is detected by the infrared sensor, and then the deviation correcting roller is controlled by the detection result to drive the pole piece on the pole piece to move along the width direction, so that the position of the pole piece along the width direction is adjusted. Of course, other alternatives of the correction sensor 301 and the correction actuator 302 may be adopted, and will not be described herein.

In some embodiments, the pole piece production apparatus 1000 further includes a temperature sensor 400, the temperature sensor 400 being disposed downstream of the pole piece surface treatment device 100 in the direction of conveyance of the pole piece and configured to detect the surface temperature of the pole piece.

In the process of performing high-temperature treatment on the pole piece, the treatment temperature needs to be controlled, so that the surface temperature of the pole piece can be maintained within a certain range after the pole piece is subjected to surface treatment.

Therefore, after the pole piece is subjected to high-temperature treatment by the pole piece surface treatment device 100, the surface temperature of the pole piece can be detected by the temperature sensor 400, so that the situation of the pole piece after being subjected to high-temperature treatment can be fed back in time. If the surface temperature of the pole piece after high temperature treatment is too low, burrs on the surface of the pole piece may not be removed completely, or the elastic deformation of the pole piece itself may not be released sufficiently. And if the surface temperature of the pole piece after high temperature treatment is too high, oxidation may occur in the uncoated area of the pole piece.

Based on this, the temperature sensor 400 is disposed at the downstream of the pole piece surface treatment device 100 along the conveying direction of the pole piece, so that the surface temperature of the pole piece after high-temperature treatment can be timely detected, the state of the pole piece after surface treatment can be conveniently mastered, and the state can also be timely fed back to correspondingly adjust the surface treatment process.

In some embodiments, the pole piece production apparatus 1000 further includes a thickness gauge 500 and a controller (not shown in the drawings), where the thickness gauge 500 is disposed downstream of the pole piece surface treatment device 100 along the conveying direction of the pole piece, and is used to detect the thickness of the pole piece. The controller is respectively in communication connection with the thickness gauge 500, the temperature sensor 400 and the pole piece surface treatment device 100, and is configured to control the pole piece surface treatment device 100 to adjust the preset temperature in the accommodating space 10 according to the detection results of the thickness gauge 500 and the temperature sensor 400.

After the pole piece is subjected to high-temperature treatment, the elastic deformation of the pole piece is released in advance, so that the thickness of the pole piece can be influenced. Therefore, the effect of the high temperature treatment of the pole piece can be judged by detecting the thickness of the pole piece after the high temperature treatment.

If the thickness gauge 500 detects that the thickness of the pole piece is too large, it may be because the preset temperature and preset time of the pole piece surface treatment apparatus 100 do not reach the expected range, resulting in insufficient release of the elastic deformation of the pole piece. If the thickness gauge 500 detects that the thickness of the pole piece is too small, the structure of the pole piece may be damaged because the preset temperature and the preset time of the pole piece surface treatment apparatus 100 are out of the expected range.

Therefore, the thickness gauge 500 feeds back the detected thickness result to the controller, and at the same time, the temperature sensor 400 feeds back the detected temperature result to the controller, and the controller can control and adjust the flow rate of the combustible gas injected into the accommodating space 10 by the gas injection member 22 or control and adjust the power and frequency of the electromagnetic induction generator 40 to realize the adjustment of the preset temperature through the detection result. The controller can also control and adjust the ignition time of the ignition piece 24 or adjust the generation time of electromagnetic induction to adjust the preset time, and finally realize the closed-loop operation of the pole piece surface treatment.

By arranging the thickness gauge 500, the controller and the temperature sensor 400, the thickness data and the surface temperature data of the pole piece after surface treatment and the preset temperature of the pole piece surface treatment device 100 can be subjected to closed-loop operation, so that the surface treatment of the pole piece is better realized.

In some embodiments, the pole piece production apparatus 1000 further includes a cooling assembly 600, where the cooling assembly 600 is disposed between the temperature sensor 400 and the thickness gauge 500 along the conveying direction of the pole piece, and is used to cool the pole piece.

Specifically, the cooling assembly 600 includes an air knife 601 and a water cooling roller 602, the air knife 601 is disposed towards the surface of the pole piece, and is used for blowing cold air to the surface of the pole piece, the pole piece is wound on the water cooling roller 602, and the surface of the pole piece is cooled by the water cooling roller 602.

Through setting up cooling module 600, can make the pole piece after detecting surface temperature through temperature sensor 400, cool off the pole piece fast, make the temperature of pole piece resume to room temperature rapidly, be convenient for follow-up thickness to the pole piece detects, improves thickness detection's accuracy.

Based on the same concept as the pole piece production device 1000 described above, the present application also provides a battery production line including the pole piece production device 1000 described above.

It should be noted that, the battery production line may include, but is not limited to, a coater, a cold press, a gravure press, a die-cutting machine, a slitting machine, a winding machine, etc., and the pole piece manufactured by the pole piece manufacturing apparatus 1000 may be applied to the assembly process of the battery cell and the battery.

Referring to fig. 4, based on the same concept as the pole piece surface treatment device 100, the present application further provides a pole piece surface treatment method, which includes the following steps:

s10: the pole piece is conveyed in the conveying direction and is passed through the accommodation space 10 of the pole piece surface treatment device 100.

Specifically, the transportation of the pole piece is realized through the conveying line 200, and in the conveying process of the pole piece, the conveying line 200 drives the pole piece to penetrate through the accommodating space 10 of the pole piece surface treatment device 100, so that the pole piece can be subjected to instantaneous high-temperature treatment in the accommodating space 10, burrs on the surface of the pole piece are removed, and the surface of the pole piece is modified through a high Wen Duiji piece, so that the elastic deformation of the pole piece is released in advance.

S20: the pole piece surface treatment device 100 is controlled to treat the pole piece in an instantaneous operation state, wherein the instantaneous operation state is a state in which the temperature in the accommodating space 10 can reach a preset temperature within a preset time to heat the pole piece.

Through the temperature increase in the accommodation space 10 to preset temperature in the preset time of pole piece surface treatment device 100 for the pole piece in the accommodation space 10 can be under the effect of instantaneous high temperature makes the burr on surface melt, on effectively getting rid of pole piece surface burr's basis, can also be under the high temperature effect, modifies the pole piece surface, makes the elastic deformation of pole piece self can release in advance, thereby makes the structure of pole piece can be more stable in the later assembly and forms the free course of working of battery.

In some embodiments, the pole piece surface treatment device 100 is controlled to reach a preset temperature of 300 degrees or more in the accommodating space 10 within a preset time of 1s or less.

Thereby, a momentary high temperature can be formed in the accommodation space 10 and act on the pole piece. On the one hand, burrs on the surface of the pole piece can be melted under the action of instantaneous high temperature, so that the purpose of removing the burrs is realized. On the other hand, the high-temperature treatment time of the pole piece can be greatly shortened, the probability of oxidization of the non-film-coated area on the pole piece is effectively reduced, and the overall structure of the pole piece is more stable.

In some embodiments, after step S20, the method further comprises the steps of:

s30: the control temperature sensor 400 detects the surface temperature of the pole piece after passing through the pole piece surface treatment apparatus 100.

After the pole piece is subjected to high-temperature treatment by the pole piece surface treatment device 100, the surface temperature of the pole piece can be detected by the temperature sensor 400, so that the surface temperature of the pole piece after the pole piece is subjected to high-temperature treatment can be timely detected, the state of the pole piece after the pole piece is subjected to surface treatment can be conveniently mastered, and the state of the pole piece after the pole piece is subjected to surface treatment can be timely fed back to correspondingly adjust the surface treatment process.

S40: the thickness gauge 500 is controlled to detect the thickness of the pole piece after passing through the pole piece surface treatment apparatus 100.

S50: the controller receives the detection results of the temperature sensor 400 and the thickness gauge 500, and controls the pole piece surface treatment device 100 to adjust the preset temperature in the accommodating space 10 according to the detection results.

The thickness gauge 500 feeds back the detected thickness result to the controller, and at the same time, the temperature sensor 400 feeds back the detected temperature result to the controller, and the controller can control and adjust the flow rate of the fuel gas injected into the accommodating space 10 by the gas injection member 22 or control and adjust the power and frequency of the electromagnetic induction generator 40 through the detected result to realize the adjustment of the preset temperature. The controller can also control and adjust the ignition time of the ignition piece 24 or adjust the generation time of electromagnetic induction to adjust the preset time, and finally realize the closed-loop operation of the pole piece surface treatment.

In some embodiments, before the step S40 of controlling the thickness gauge 500 to detect the thickness of the pole piece after passing through the pole piece surface treatment apparatus 100, the method further includes the steps of:

s35: the cooling assembly 600 is controlled to cool the pole piece after being detected by the temperature sensor 400.

According to one or more embodiments, during the transport of the pole piece, the pole piece is passed through the receiving space 10 of the pole piece surface treatment apparatus 100, and by controlling the pole piece surface treatment apparatus 100, a flame can be formed by igniting a combustible gas or a current can be formed by electromagnetic induction, and the temperature in the receiving space 10 is raised to 300 degrees or more in a time of less than or equal to 1s, thereby instantaneously heating the pole piece.

At this time, under the action of instantaneous high temperature, burrs on the surface of the pole piece are melted, so that the purpose of removing the burrs is achieved. Meanwhile, the instantaneous high temperature modifies the surface of the pole piece, and releases the elastic deformation of the pole piece in advance, so that the pole piece is more stable in the processing process of forming the battery monomer in the subsequent assembly.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims

1. A pole piece surface treatment device characterized by having an accommodation space for accommodating a pole piece, the pole piece surface treatment device being configured to include an instantaneous operation state that is a state capable of bringing a temperature in the accommodation space to a preset temperature for heating the pole piece within a preset time;

wherein the preset time is less than or equal to 1s.

2. The pole piece surface treatment device of claim 1, wherein the predetermined temperature is in the range of 300 ℃ to 800 ℃.

3. The pole piece surface treatment device according to claim 1, wherein the pole piece surface treatment device comprises at least two operation components arranged at intervals along a first direction, wherein each two adjacent operation components are spaced to form the accommodating space;

4. A pole piece surface treatment device according to claim 3, wherein each operating assembly comprises a main body and an air injection member, the space between each two adjacent main bodies forms the accommodating space, and the air injection member is arranged on the corresponding main body and is used for injecting combustible gas into the corresponding accommodating space.

5. The pole piece surface treatment device according to claim 4, wherein the air injection member has an air injection port, the air injection port is opened toward the accommodation space, and the aperture of the air injection port is 50mm-1000mm.

6. The pole piece surface treatment device of claim 4, wherein each of the operating assemblies further comprises a shield disposed on the main body, the shield being disposed between the main body and the corresponding pole piece in the first direction, and the air jet being disposed between the shield and the corresponding main body;

the shielding piece is used for shielding a part of the area on the pole piece, so that the ignited combustible gas only acts on the area, which is not shielded, on the pole piece.

7. A pole piece surface treatment device according to claim 6, wherein each of the blinders is detachably disposed on the corresponding body.

8. The pole piece surface treatment device of claim 6, wherein each of the blinders includes sub-members disposed at opposite ends of the main body along a second direction, respectively, and the second direction intersects the first direction;

The width direction of the pole piece accommodated in the accommodating space is along the second direction.

9. The pole piece surface treatment device of claim 4, wherein each of the operating assemblies further comprises a pilot member disposed on the corresponding body, at least a portion of the pilot member extending into the receiving space and being configured to pilot a combustible gas in the receiving space.

10. The pole piece surface treatment device of claim 4, wherein each of the operating assemblies further comprises a first drive assembly drivingly connected to the corresponding body, the first drive assembly for driving the corresponding body to move in the first direction to adjust the spacing of the body from the pole piece in the first direction.

11. The pole piece surface treatment device of claim 10, wherein each of the operating assemblies further comprises a second drive assembly drivingly connected to the corresponding body for driving the corresponding body to move in a direction parallel to the pole piece.

12. The pole piece surface treatment device according to claim 1, comprising an induction coil and an electromagnetic induction generator connected to each other, the induction coil surrounding the accommodation space, the electromagnetic induction generator being configured to form a current in the accommodation space by electromagnetic induction and act on the pole piece.

13. The pole piece surface treatment device of claim 12, wherein the number of turns of the induction coil circumferentially disposed is 1 turn or more.

14. The pole piece surface treatment device according to claim 12, wherein the pole piece is disposed in the housing space in a plane intersecting the direction of passing the pole piece, and the induction coil has a closed ring shape in cross-section.

15. The pole piece surface treatment device of claim 12, wherein the electromagnetic induction generator has a power of 5KW or more; and/or, the frequency of the electromagnetic induction generator is greater than or equal to 20KHz.

16. A pole piece production device, characterized by comprising a conveying line and a pole piece surface treatment device according to any one of claims 1-15, wherein the conveying line is used for conveying pole pieces and driving the pole pieces to pass through the accommodating space of the pole piece surface treatment device.

17. The pole piece production device of claim 16, further comprising a deviation rectifying mechanism for rectifying the position of the pole piece within the receiving space.

18. The pole piece production apparatus of claim 16, further comprising a temperature sensor disposed downstream of the pole piece surface treatment device in a conveying direction of the pole piece and configured to detect a surface temperature of the pole piece.

19. The pole piece production device of claim 18, further comprising a thickness gauge and a controller, the thickness gauge being disposed downstream of the pole piece surface treatment device in a conveying direction of the pole piece and configured to detect a thickness of the pole piece;

the controller is respectively in communication connection with the thickness gauge, the temperature sensor and the pole piece surface treatment device, and the controller is configured to control the pole piece surface treatment device to adjust the preset temperature in the accommodating space according to the detection results of the thickness gauge and the temperature sensor.

20. The pole piece production device of claim 19, further comprising a cooling assembly disposed between the temperature sensor and the thickness gauge along a transport direction of the pole piece and configured to cool the pole piece.

21. A battery production line comprising a pole piece production apparatus as claimed in any one of claims 16 to 20.

22. The pole piece surface treatment method is characterized by comprising the following steps of:

And controlling the pole piece surface treatment device to treat the pole piece in an instantaneous operation state, wherein the instantaneous operation state is a state in which the temperature in the accommodating space can reach a preset temperature within a preset time to heat the pole piece.

23. The pole piece surface treatment method according to claim 22, wherein the pole piece surface treatment device is controlled to reach a preset temperature range of 300 ℃ to 800 ℃ within a preset time of 1s or less.

24. The pole piece surface treatment method according to claim 22, further comprising, after the step of controlling the pole piece surface treatment device to treat the pole piece in the transient operation state, the step of:

and the controller receives detection results of the temperature sensor and the thickness gauge and controls the pole piece surface treatment device to adjust the preset temperature in the accommodating space according to the detection results.

25. The pole piece surface treatment method according to claim 24, characterized by, before the step of controlling a thickness gauge to detect the thickness of the pole piece after passing through the pole piece surface treatment device, further comprising the step of:

and controlling a cooling assembly to cool the pole piece after being detected by the temperature sensor.