CN119603807A

CN119603807A - Pole heating system, method, device and pole cold pressing equipment

Info

Publication number: CN119603807A
Application number: CN202510139791.4A
Authority: CN
Inventors: 余仁鹏; 刘东升
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2025-02-08
Filing date: 2025-02-08
Publication date: 2025-03-11

Abstract

The application relates to a pole piece heating system, a pole piece heating method, a pole piece cold pressing device and an adjustable conductive probe, wherein the adjustable conductive probe is in contact with a pole piece to be heated, and when the pole piece to be heated moves along a tape feeding direction, the contact time between the same position of the pole piece to be heated and a heating surface can be changed by changing the size of the heating surface of the adjustable conductive probe in the tape feeding direction, so that the heating time of the pole piece to be heated is changed. In an actual scene, the target size of the adjustable conductive probe is determined only according to the heating requirement parameter, so that the size of the heating surface of the adjustable conductive probe in the tape running direction is adjusted to be the target size. Finally, a power supply is started to apply electric energy to the pole piece to be heated, and the pole piece to be heated generates Joule heat due to self resistance, so that heating operation is realized. According to the scheme, the electric energy is directly applied to the pole piece to be heated, the pole piece to be heated is self-heated in a joule heating mode, the energy transfer efficiency of the pole piece during heating can be effectively improved, and therefore the phenomenon of energy waste is relieved.

Description

Pole piece heating system, method and device and pole piece cold pressing equipment

Technical Field

The application relates to the technical field of batteries, in particular to a pole piece heating system, a pole piece heating method, a pole piece heating device and a pole piece cold pressing device.

Background

With the development of new energy technology, secondary batteries represented by lithium batteries are gradually applied to various fields such as energy storage systems, electric vehicles, military equipment, aerospace and the like, and great electricity utilization convenience is brought to daily production and life of people. The quality of the pole piece is directly affected on the overall performance and service life of the battery as an important component of the battery, and cold pressing and heating of the pole piece are important means for improving the quality of the pole piece in the pole piece production process.

However, in the related art, the pole piece is generally heated by electromagnetic induction or microwave, and the energy transfer efficiency is low.

Disclosure of Invention

Based on the above, it is necessary to provide a pole piece heating system, a method, a device and a pole piece cold pressing equipment, so as to improve the energy transfer efficiency during pole piece heating and further alleviate the phenomenon of energy waste.

The application provides a pole piece heating system which comprises a power supply and an adjustable conductive probe, wherein the adjustable conductive probe is connected with the power supply, the adjustable conductive probe comprises a heating surface which is contacted with a pole piece to be heated, and the dimension of the heating surface along the tape moving direction of the pole piece to be heated can be adjusted to be a target dimension determined by heating requirement parameters.

According to the scheme, the adjustable conductive probe is connected with the power supply, and the adjustable conductive probe is used for a heating surface which is in contact with the pole piece to be heated, and the size of the pole piece to be heated in the tape moving direction can be adjusted. Therefore, when the adjustable conductive probe is contacted with the pole piece to be heated and the pole piece to be heated moves along the tape running direction, the contact time between the same position of the pole piece to be heated and the heating surface can be changed by changing the dimension of the heating surface of the adjustable conductive probe along the tape running direction, and the heating time of the pole piece to be heated is further changed. In an actual scene, the target size of the adjustable conductive probe is determined only according to the heating requirement parameter, so that the size of the heating surface of the adjustable conductive probe in the tape running direction is adjusted to be the target size. Finally, a power supply is started to apply electric energy to the pole piece to be heated, and the pole piece to be heated generates Joule heat due to self resistance, so that heating operation is realized. According to the scheme, the electric energy is directly applied to the pole piece to be heated, the pole piece to be heated is self-heated in a joule heating mode, the energy transfer efficiency of the pole piece during heating can be effectively improved, and therefore the phenomenon of energy waste is relieved.

In some embodiments, the adjustable conductive probe includes a first adjustable conductive probe that connects to a positive pole of the power supply and a second adjustable conductive probe that connects to a negative pole of the power supply.

According to the scheme, the positive electrode and the negative electrode of the power supply are respectively provided with the adjustable conductive probes, and the electric energy is applied to the pole piece to be heated through the two adjustable conductive probes, so that the heating efficiency is effectively improved.

In some embodiments, the pole piece heating system further comprises a probe adjustment assembly connected to the adjustable conductive probe and a control assembly connected to the probe adjustment assembly and the power supply.

Above-mentioned scheme, pole piece heating system still includes probe adjusting part and control assembly to control assembly drive probe adjusting part's mode realizes the regulation of adjustable conductive probe, has higher regulation efficiency and adjusts the convenience.

In some embodiments, the adjustable conductive probe comprises a foldable conductive probe that is foldable along a tape direction of the pole piece to be heated.

According to the scheme, the adjustable conductive probe is configured in the foldable mode, the dimension of the pole piece to be heated in the tape feeding direction is changed in a folding mode, the possibility of damage of the adjustable conductive probe due to adjustment is reduced, and the use reliability of the adjustable conductive probe is improved.

In some embodiments, the adjustable conductive probe comprises a flexible conductive probe.

According to the scheme, the adjustable conductive probe is configured as the flexible conductive probe, so that friction of the pole piece to be heated in the heating process is reduced.

In some embodiments, the power source comprises a current-adjustable power source.

According to the scheme, the power supply is configured into the current-adjustable power supply, so that the pole piece heating system has a wider application range, and the universality of the pole piece heating system is improved.

The application provides pole piece cold pressing equipment which comprises a cold pressing roller, a passing roller, a winding roller and the pole piece heating system, wherein the cold pressing roller, the passing roller and the winding roller are used for conveying a pole piece to be heated, the passing roller is arranged between the cold pressing roller and the winding roller, and the adjustable conductive probe is arranged on the passing roller.

According to the scheme, the pole piece heating system is applied to the cold pressing process of the pole piece, and the pressure release and water removal of the pole piece can be realized by heating the pole piece, so that the quality of the pole piece is improved.

In some embodiments, the number of pass rollers is a plurality, and the adjustable conductive probe is disposed on one of the pass rollers adjacent to the cold press roller.

According to the scheme, the adjustable conductive probe is arranged at the position close to the cold pressing roller, so that the pole piece to be heated has enough time to complete the heating rebound process, and the pole piece heating effect is improved.

The application provides a pole piece heating method of the pole piece heating system, which comprises the steps of determining the target size of an adjustable conductive probe according to heating requirement parameters, adjusting the size of a heating surface of the adjustable conductive probe in the tape feeding direction to be the target size, and controlling the power supply to start to operate so as to apply electric energy to the pole piece to be heated through the heating surface.

According to the technical scheme, the dimension of the adjustable conductive probe along the tape moving direction of the pole piece to be heated can be adjusted to be the target dimension according to the actual heating demand parameters, so that accurate heating temperature control is realized, and the pole piece heating effect is improved.

In some embodiments, the determining the target size of the adjustable conductive probe based on the heating demand parameter includes determining the target size of the adjustable conductive probe based on a target heating temperature.

According to the scheme, the pole piece is heated by adopting the constant-current type power supply, and heating current is constant in the heating process, so that the influence of heating current is not needed to be considered when the target size is determined, and the heating control complexity can be effectively reduced.

In some embodiments, the determining the target size of the adjustable conductive probe based on the heating demand parameter includes determining the target size of the adjustable conductive probe based on a target heating temperature and a target heating current.

According to the scheme, the current-adjustable power supply is adopted for heating the pole piece, different target heating currents can be applied to the pole piece to be heated according to different heating requirement parameters, and the target size is determined by combining the target heating currents and the target heating temperature, so that the application range of the pole piece heating system is improved.

In some embodiments, the determining the target size of the adjustable conductive probe according to the target heating temperature and the target heating current comprises calculating a target heating time according to the target heating current and the target heating temperature, and calculating the target size of the adjustable conductive probe according to the target heating time and the tape speed of the pole piece to be heated.

According to the scheme, the target heating time required by heating is calculated by combining the target heating current and the target heating temperature, and then the target size matched with the target heating time and the tape feeding speed is calculated, so that the target size calculation accuracy is high.

In some embodiments, determining the target size of the adjustable conductive probe according to the target heating temperature and the target heating current includes matching the target size of the adjustable conductive probe according to the target heating current, the target heating temperature, and a preset correspondence between the heating temperature, the heating current and the size.

According to the scheme, the corresponding relation among the heating temperature, the heating current and the size can be established through experiments in advance, and in an actual scene, the target size can be determined by matching in the pre-established corresponding relation only by combining the target heating current and the target heating temperature, so that the target size determination efficiency is high.

In some embodiments, the pole piece heating method further comprises determining a target heating temperature according to the type of the pole piece to be heated and/or determining a target heating current according to the type of the pole piece to be heated.

According to the scheme, different target heating temperatures and/or target heating currents can be matched for the pole piece to be heated according to the type of the pole piece to be heated, and the pole piece heating accuracy is improved.

The application provides a pole piece heating device of the pole piece heating system, which comprises a size analysis module, a size adjustment module and a heating control module, wherein the size analysis module is used for determining the target size of an adjustable conductive probe according to heating requirement parameters, the size adjustment module is used for adjusting the size of a heating surface of the adjustable conductive probe in the tape feeding direction to be the target size, and the heating control module is used for controlling the power supply to be started and operated so as to apply electric energy to the pole piece to be heated through the heating surface.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the accompanying drawings. In the drawings:

FIG. 1 is a schematic diagram of a pole piece heating system in accordance with some embodiments of the present application;

FIG. 2 is a schematic diagram of a pole piece heating system according to other embodiments of the present application;

FIG. 3 is a schematic diagram of a pole piece heating system according to further embodiments of the present application;

FIG. 4 is a schematic diagram of a pole piece heating system in accordance with further embodiments of the present application;

FIG. 5 is a schematic view of a cold-pressing apparatus for pole pieces according to still other embodiments of the present application;

FIG. 6 is a flow chart of a method for heating a pole piece according to some embodiments of the application;

FIG. 7 is a schematic flow chart of a method for heating a pole piece according to other embodiments of the present application;

FIG. 8 is a flow chart of a method for heating a pole piece according to still other embodiments of the present application;

FIG. 9 is a flow chart of a method for heating a pole piece according to still other embodiments of the present application;

FIG. 10 is a schematic flow chart of a method for heating a pole piece according to other embodiments of the present application;

FIG. 11 is a schematic view of a pole piece heating device according to some embodiments of the present application;

FIG. 12 is a schematic diagram of the internal architecture of a computer device according to some embodiments of the application.

Reference numerals illustrate:

10-power supply, 20-adjustable conductive probe, 21-first adjustable conductive probe, 22-second adjustable conductive probe, 41-probe adjusting component, 42 control component, 51-cold press roller, 52-passing roller and 53-winding roller.

Detailed Description

Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs, the terms used herein are for the purpose of describing particular embodiments only and are not intended to be limiting of the application, and the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the above description of the drawings are intended to cover non-exclusive inclusions.

In the description of embodiments of the present application, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiment of the present application, the term "and/or" is merely an association relationship describing the association object, and indicates that three relationships may exist, for example, a and/or B, and may indicate that a exists alone, while a and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means two or more (including two).

In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical 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 based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "fixed" and the like are to be construed broadly and include, for example, fixed connection, detachable connection, or integral therewith, mechanical connection, electrical connection, direct connection, indirect connection via an intermediary, communication between two elements, or interaction between two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.

Currently, the more widely the battery is used in view of the development of market situation. The energy storage system is not only applied to energy storage 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 the like, and a plurality of fields such as military equipment, aerospace and the like. With the continuous expansion of the battery application field, the market demand thereof is also continuously expanding.

The battery pole piece is a three-layer structure composite material formed by coating electrode materials on the upper surface and the lower surface of a current collector foil, and comprises a positive pole piece and a negative pole piece, wherein different active substances are respectively adopted as electrode materials. The pole piece is used as an important component of the battery, and needs to have good conductivity, mechanical stability, flexibility and the like, and the quality of the pole piece directly influences the performance and the service life of the battery. At present, the pole piece is usually required to be subjected to processes such as coating, rolling and cutting, and after rolling is finished, the pole piece is often required to be heated before rolling, so that the process characteristics of the pole piece are improved, and the quality of the pole piece is improved.

However, currently, pole piece heating generally employs an additional configuration of heating devices to transfer heat to the pole piece to complete the pole piece heating operation. For example, a microwave generating device, an electromagnetic heating device, etc. are used to transfer heat to the pole pieces. The existing heating modes such as heat transfer, heat radiation and the like are low in energy transfer efficiency, so that the heating speed is affected, excessive energy waste is caused, and the heating modes easily cause uneven heat of the pole pieces.

The research shows that the electrode plates are conductive materials, both of which are electrode materials coated on the upper and lower surfaces and are foil materials, and the electrode plates have a certain resistance value and generate a certain joule heat when the electrode plates are electrified. Therefore, in order to improve the energy transfer efficiency during heating, it is conceivable to directly apply electric energy to the pole piece and heat the pole piece in a manner of joule heating of the pole piece.

Based on the above consideration, the application provides a pole piece heating system, which comprises a power supply and an adjustable conductive probe, wherein the adjustable conductive probe is connected with the power supply and comprises a heating surface in contact with a pole piece to be heated, and the dimension of the heating surface along the tape moving direction of the pole piece to be heated can be adjusted to be a target dimension determined by heating requirement parameters.

Through the scheme, the adjustable conductive probe is in contact with the pole piece to be heated, and when the pole piece to be heated moves along the tape feeding direction, the contact time between the same position of the pole piece to be heated and the heating surface can be changed, namely the heating time of the pole piece to be heated is changed by changing the dimension of the heating surface of the adjustable conductive probe in the tape feeding direction. In an actual scene, the target size of the adjustable conductive probe is determined only according to the heating requirement parameter, so that the size of the heating surface of the adjustable conductive probe in the tape running direction is adjusted to be the target size. Finally, a power supply is started to apply electric energy to the pole piece to be heated, and the pole piece to be heated generates Joule heat due to self resistance, so that heating operation is realized.

According to the scheme, the electric energy is directly applied to the pole piece to be heated, the pole piece to be heated is self-heated in a joule heating mode, the energy transfer efficiency of the pole piece during heating can be effectively improved, and therefore the phenomenon of energy waste is relieved.

The pole piece heating system provided by the application is applicable to the process of heating demand parameters of the battery pole piece, wherein the pole piece used for heating can be an undivided pole piece, can be a pole piece after slitting, can also be a pole piece after being combined with other materials of the battery, and can be used for heating as long as the pole piece has the heating demand parameters, and is not particularly limited.

In order to facilitate understanding of the technical scheme of the application, the following embodiments are all explained by using the pole piece heating system before pole piece slitting, and specifically can be a stage before the pole piece is cold-pressed out from a cold-pressing roller and enters a winding roller for winding in a pole piece cold-pressing process.

Referring to fig. 1, the present application provides a pole piece heating system, which includes a power supply 10 and an adjustable conductive probe 20, wherein the adjustable conductive probe 20 is connected with the power supply 10, the adjustable conductive probe 20 includes a heating surface contacting with a pole piece to be heated, and the dimension of the heating surface along the tape running direction of the pole piece to be heated can be adjusted to a target dimension determined by a heating requirement parameter.

Specifically, the type of the power source 10, i.e. a device or equipment capable of outputting electric energy, is not limited, and different types or models of power sources 10 can be selected according to actual requirements, which is not limited in particular. The heating demand parameters include heating operating parameters (e.g., heating current) required during heating of the pole piece and/or parameters (e.g., heating temperature) required to be reached after heating is completed.

The adjustable conductive probe 20 has conductivity, and the dimension of the heating surface along the feeding direction of the pole piece to be heated can be adjusted, and the adjustable conductive probe is used for contacting with the pole piece to be heated, and transmitting the electric energy of the power supply 10 to the electric energy transmission device of the pole piece to be heated. Wherein the surface of the adjustable conductive probe 20 that is in direct contact with the pole piece to be heated is defined as the heating surface. The heating surface may be configured in different shapes according to actual needs, and may be in a regular shape, for example, a rectangle, a trapezoid, or the like, or may be in an irregular shape, which is not particularly limited.

The tape feeding direction of the pole piece to be heated refers to the conveying direction of the pole piece to be heated on a production line. In an actual scene, the pole piece to be heated is in a running state of tape, in order to realize heating of all positions of the pole piece, the adjustable conductive probes 20 are required to be fixedly arranged, and different positions of the pole piece to be heated sequentially pass through the adjustable conductive probes 20 through tape of the pole piece to be heated, so that heating of all positions of the pole piece to be heated is realized. Therefore, the size of the heating surface along the tape running direction of the pole piece to be heated can be changed, the equivalent length of the heating surface along the tape running direction can be adjusted, and the heating time can be adjusted. Specifically, under the condition that other conditions are not changed, the longer the equivalent length is, the longer the heating time of the same position point of the pole piece to be heated is.

It should be noted that the number of power sources 10 and adjustable conductive probes 20 in the pole piece heating system is not exclusive, and in one embodiment, one power source 10 may be provided, and one or more adjustable conductive probes 20 may be connected to the power source 10 to form the pole piece heating system. In other embodiments, two or more power sources 10 may be provided, and each power source 10 is correspondingly connected to one or more adjustable conductive probes 20, so as to heat the pole piece to be heated, which is not particularly limited.

One power supply 10 and one or more adjustable conductive probes 20 correspondingly connected to the power supply 10 can be regarded as a heating group, taking one power supply 10 and one adjustable conductive probe 20 as examples, the adjustable conductive probe 20 can be connected with the positive electrode of the power supply 10, and the negative electrode of the power supply 10 can be connected with a pole piece to be heated to form a closed heating loop. If the number of the adjustable conductive probes 20 is plural, the positive and negative electrodes of the power supply 10 can be connected to the adjustable conductive probes 20 respectively to form a closed heating loop, which is specifically set in combination with the actual requirements.

It will be appreciated that in one embodiment, the dimension of the heating surface along the running direction of the pole piece to be heated is specifically the length of the heating surface along the running direction of the pole piece to be heated, and the target dimension is the target length. In other embodiments, the dimension of the heating surface along the tape running direction of the pole piece to be heated may also be parameters such as the diameter of the heating surface (taking a circular heating surface as an example), which are not specifically limited, so long as the equivalent length of the heating surface in the tape running direction can be changed by adjusting the dimension.

In one embodiment, the adjustable conductive probe 20 may include a fixed conductive portion and an adjustable conductive portion, the heating surface is at least partially located in the adjustable conductive portion, the size of the heating surface along the tape running direction may be changed by adjusting the adjustable conductive portion, the fixed conductive portion is electrically connected to the adjustable conductive portion, and the adjustable conductive portion is connected to the power supply 10 through the fixed conductive portion. In this way, when the adjustable conductive part is adjusted, the influence on the connection between the adjustable conductive probe 20 and the power supply 10 is reduced, and the connection reliability of the power supply 10 of the adjustable conductive probe 20 is improved.

In further embodiments, it is also possible that the adjustable conductive probe 20 comprises only an adjustable conductive part, i.e. the entire adjustable conductive probe 20 is configured to be adjustable according to the heating requirements. Thus, the volume of the adjustable conductive probe 20 can be reduced, and the cost of the adjustable conductive probe 20 can be saved.

It can be appreciated that the adjustment mode of the adjustable conductive probe 20 is not unique, and can be manually adjusted by a user according to actual requirements, or can be automatically adjusted by a driver such as a motor, which is not limited specifically and can be selected in combination with the actual requirements.

It should be noted that the shape of the adjustable conductive probe 20 is not limited to the only one, and in one embodiment, the adjustable conductive probe 20 may be configured in a regular hexahedral, truncated cone or prismatic table shape, or may be configured in an irregular shape, which is not limited in particular, and only needs to ensure that a heating surface is in contact with the pole piece to be heated.

Further, in one embodiment, to improve the uniformity and efficiency of heating the pole piece, the width of the heating surface of the adjustable conductive probe 20 may be set to be consistent with the width of the pole piece to be heated. Specifically, referring to fig. 2, the length of the heating surface along the tape running direction is defined as the length direction of the heating surface, the direction perpendicular to the length direction is defined as the width direction, and the distance in the width direction is the width W1 of the heating surface. And defining the direction perpendicular to the tape feeding direction as the width direction in the surface of the pole piece to be heated, which is in contact with the heating surface, wherein the distance in the width direction is the width W2 of the pole piece to be heated. In this way, in the process of feeding the pole piece to be heated, all the position points in the width direction of the pole piece to be heated are contacted with the adjustable conductive probe 20, so that the heating uniformity and the heating efficiency can be greatly improved.

According to the scheme, the adjustable conductive probe 20 is connected with the power supply 10, the adjustable conductive probe 20 is used for a heating surface which is in contact with the pole piece to be heated, and the dimension of the pole piece to be heated in the tape moving direction can be adjusted. In this way, the adjustable conductive probe 20 is in contact with the pole piece to be heated, and when the pole piece to be heated moves along the tape running direction, the contact time between the same position of the pole piece to be heated and the heating surface can be changed by changing the size of the heating surface of the adjustable conductive probe 20 along the tape running direction, so that the heating time of the pole piece to be heated is changed. In an actual scenario, only the target size of the adjustable conductive probe 20 needs to be determined according to the heating requirement parameter, so that the size of the heating surface of the adjustable conductive probe 20 in the tape running direction is adjusted to be the target size. Finally, the power supply 10 is started to apply electric energy to the pole piece to be heated, and the pole piece to be heated generates Joule heat due to self resistance, so that heating operation is realized. According to the scheme, the electric energy is directly applied to the pole piece to be heated, the pole piece to be heated is self-heated in a joule heating mode, the energy transfer efficiency of the pole piece during heating can be effectively improved, and therefore the phenomenon of energy waste is relieved.

Referring to fig. 3, in some embodiments, the adjustable conductive probe 20 includes a first adjustable conductive probe 21 and a second adjustable conductive probe 22, the first adjustable conductive probe 21 is connected to the positive pole of the power supply 10, and the second adjustable conductive probe 22 is connected to the negative pole of the power supply 10.

Specifically, this embodiment is explained taking the example that one heating group includes two adjustable conductive probes 20. The first adjustable conductive probe 21 and the second adjustable conductive probe 22 are respectively connected with the positive electrode and the negative electrode of the power supply 10, and when the first adjustable conductive probe 21 and the second adjustable conductive probe 22 are both in contact with the pole piece to be heated, a closed heating loop is formed due to the conductivity of the pole piece to be heated.

To improve the heating efficiency, the first adjustable conductive probe 21 and the second adjustable conductive probe 22 may be disposed on the upper surface and the lower surface of the pole piece to be heated, where the upper surface and the lower surface of the pole piece to be heated are two surfaces of the pole piece to be heated, respectively, used for coating the electrode material.

It can be appreciated that the types of the first adjustable conductive probe 21 and the second adjustable conductive probe 22 may be the same or different, so long as the first adjustable conductive probe 21 and the second adjustable conductive probe 22 can both adjust the adjustable conductive probes according to actual requirements to change the heating time, which is not particularly limited.

According to the scheme, the positive electrode and the negative electrode of the power supply 10 are respectively provided with the adjustable conductive probes 20, and the electric energy is applied to the pole piece to be heated through the two adjustable conductive probes 20, so that the heating efficiency is effectively improved.

Referring to fig. 4, in some embodiments, the pole piece heating system further includes a probe adjustment assembly 41 and a control assembly 42, the probe adjustment assembly 41 being connected to the adjustable conductive probe 20, the control assembly 42 being connected to the probe adjustment assembly 41 and the power supply 10.

Specifically, the probe adjustment assembly 41 is a device for adjusting the size of the heating surface of the adjustable conductive probe 20. The control assembly 42 is also a device for automatically controlling the heating of the pole pieces. It will be appreciated that the control assembly 42 may be a stand alone controller or may employ devices for other control functions in the pole piece manufacturing process, such as, but not limited to, a controller for a pole piece cold press process.

In an actual scenario, the user may input the heating requirement parameter to the control component 42 first, specifically, may input the heating requirement parameter by a remote communication manner, etc., and then the control component 42 analyzes the heating requirement parameter to determine the target size of the adjustable conductive probe 20 required to meet the heating requirement parameter in the current scenario. After that, the control component 42 analyzes or matches the corresponding relation between the size and the adjustment signal to obtain an adjustment command corresponding to the current target size, and sends the adjustment command to the probe adjustment component 41, so that the probe adjustment component 41 drives the adjustable conductive probe 20 to move, and the size of the heating surface of the adjustable conductive probe 20 is adjusted to the target size. Finally, the power supply 10 is controlled to be started to operate, so that electric energy can be transmitted to the pole piece to be heated, and joule heating of the pole piece to be heated is realized.

It should be noted that the type of probe adjustment assembly 41 is not unique and that the probe adjustment assembly 41 used will vary depending on the particular type of adjustable conductive probe 20. For example, in one embodiment, the probe adjustment assembly 41 may be a motor drive that may drive the adjustable conductive probe 20 to either stretch or compress, thereby changing the size of the heating surface.

According to the scheme, the pole piece heating system further comprises the probe adjusting component 41 and the control component 42, and the mode that the probe adjusting component 41 is driven by the control component 42 is used for adjusting the adjustable conductive probe 20, so that higher adjusting efficiency and adjusting convenience are achieved.

In some embodiments, the adjustable conductive probe 20 comprises a collapsible conductive probe that is collapsible along the tape direction of the pole piece to be heated.

Specifically, the foldable conductive probe refers to a component which has conductive capability and can be folded in the tape running direction of the pole piece to be heated. The size of the heating surface in the tape feeding direction can be reduced by folding the foldable conductive probe, so that the heating time of the same position point in the pole piece to be heated is reduced.

In the above scheme, the adjustable conductive probe 20 is configured in a foldable form, so that the dimension of the pole piece to be heated in the tape feeding direction is changed in a folding manner, the possibility of damage of the adjustable conductive probe 20 due to adjustment is reduced, and the use reliability of the adjustable conductive probe 20 is improved.

It will be appreciated that in other embodiments, the adjustable conductive probe 20 may also be configured as a telescoping type conductive probe that can be motor driven to extend to increase the size of the heating surface and motor driven to retract to decrease the size of the heating surface.

Further, in other embodiments, the adjustable conductive probe 20 may be configured as a compressible conductive probe, and the size of the heating surface is adjusted by the way that the probe adjusting component 41 drives it to compress or expand, which is not limited in particular.

In some embodiments, the adjustable conductive probe 20 comprises a flexible conductive probe.

Specifically, the flexible conductive probe is a conductive probe prepared from a flexible material. In an actual scene, the adjustable conductive probe 20 needs to be directly contacted with an electrode material coated on the surface of the electrode to be heated, and the electrode to be heated is in a tape feeding state in the heating process, so that the phenomenon that the adjustable conductive probe 20 scratches the electrode to be heated is relieved, and the adjustable conductive probe 20 needs to be prepared by a flexible material.

It will be appreciated that the type of flexible material used in the flexible conductive probe is not exclusive and may be carbon fiber or the like, and is not particularly limited.

In the above scheme, the adjustable conductive probe 20 is configured as a flexible conductive probe, so that friction of the pole piece to be heated in the heating process is reduced.

In some embodiments, power supply 10 comprises a current-adjustable power supply.

Specifically, the current-adjustable power supply refers to a power supply with an output current which can be adjusted according to requirements. It is known from joule's law that joule heat generated by the pole piece to be heated is different from joule heat generated by the current applied to the pole piece to be heated, the current application time and the heating resistance of the pole piece to be heated, and the temperature to which the pole piece to be heated can be heated is also different. Therefore, according to different heating temperature requirements, the output current of the current-adjustable power supply can be adjusted according to actual scenes.

In the above scheme, the power supply 10 is configured as a current-adjustable power supply, so that the pole piece heating system has a wider application range, and the universality of the pole piece heating system is improved.

It will be appreciated that in other embodiments, the power supply 10 may also be configured as a constant current power supply, i.e. a power supply that outputs a constant current magnitude. In this way, when heating the pole pieces to be heated of different types, the influence caused by different heating currents is not required to be considered, and only the requirement is combined, so that the adjustable conductive probe 20 is configured to perform power transmission in a proper size.

Referring to fig. 5, the present application provides a pole piece cold pressing apparatus, which includes a cold pressing roller 51, a passing roller 52, a winding roller 53, and the pole piece heating system described above, wherein the cold pressing roller 51, the passing roller 52, and the winding roller 53 are used for conveying a pole piece to be heated, the passing roller 52 is disposed between the cold pressing roller 51 and the winding roller 53, and the adjustable conductive probe 20 is disposed on the passing roller 52.

Specifically, the structure and implementation of the pole piece heating system are shown in the foregoing embodiments and the drawings, and are not described herein. In the pole piece cold pressing process, the pole piece to be heated is outputted after cold pressing by a cold pressing roller 51 under the drive of a driving device, is flattened by at least one passing roller 52, and is finally wound at a winding roller 53. Thus, the adjustable conductive probe 20 can be arranged at the roller 52, so that the pole piece heating operation before the winding of the winding roller 53 after the cold pressing of the cold pressing roller 51 is realized.

According to the scheme, the pole piece heating system is applied to the cold pressing process of the pole piece, and the process characteristics of the pole piece are improved by heating the pole piece, for example, the quick rebound, pressure release and water removal of the pole piece can be realized, and the quality of the pole piece is improved.

In some embodiments, the number of pass rollers 52 is multiple, and the adjustable conductive probe 20 is disposed on a pass roller 52 adjacent to the cold press roller 51.

Specifically, in an actual scenario, the pole piece after cold pressing needs to be sequentially transported by a plurality of passing rollers 52 to reach the winding roller 53 for winding, and a passing roller 52 close to the cold pressing roller 51 refers to a passing roller 52 through which the pole piece first passes after exiting from the cold pressing roller 51.

According to the scheme, the adjustable conductive probe 20 is arranged at a position close to the cold pressing roller 51, so that the pole piece to be heated has enough time to complete the heating rebound process, and the pole piece heating effect is improved.

Referring to fig. 6, the present application provides a pole piece heating method according to the pole piece heating system, which includes steps 602, 604 and 606.

Step 602, determining a target size of the adjustable conductive probe according to the heating requirement parameter.

Step 604, adjusting the dimension of the heating surface of the adjustable conductive probe in the tape running direction to a target dimension.

In step 606, the power is controlled to be turned on to apply electric energy to the pole piece to be heated through the heating surface.

Specifically, the pole piece heating system is shown in the above embodiments and the drawings, and will not be described herein. The target size refers to the size that the heating surface of the adjustable conduction probe 20 needs to reach when heating is performed. In the pole piece heating process, the target size of the adjustable conductive probe 20 can be determined according to the heating requirement parameter, then the size of the adjustable conductive probe is adjusted according to the target size, the size of the heating surface in the tape feeding direction is adjusted to be the target size, and finally the power supply 10 is controlled to be started, so that the heating operation can be realized.

It should be noted that the above-mentioned pole piece heating method may be performed manually by a user or may be automatically implemented by a computer program, and is not particularly limited. Taking automatic implementation by a computer program as an example, the pole piece heating system comprises a power supply 10, an adjustable conductive probe 20, a probe adjusting component 41 and a control component 42, wherein the control component 42 stores a program related to a pole piece heating method, the control component 42 can identify and obtain a target size of the adjustable conductive probe 20 according to heating requirement parameters, and a proper adjusting instruction is matched with the target size and sent to the probe adjusting component 41, so that the probe adjusting component 41 adjusts the size of a heating surface to the target size, and finally the pole piece heating operation can be realized by starting the power supply 10.

According to the scheme, the dimension of the adjustable conductive probe 20 along the tape moving direction of the pole piece to be heated can be adjusted to be the target dimension according to the actual heating demand parameters, so that accurate heating temperature control is realized, and the pole piece heating effect is improved.

Referring to fig. 7, in some embodiments, step 602 includes step 702.

Step 702, determining a target size of the adjustable conductive probe based on a target heating temperature.

Specifically, in the solution of this embodiment, the power supply 10 is a constant current power supply, and the current output from the power supply 10 to the pole piece to be heated is fixed, so the factor affecting the temperature of the pole piece to be heated is the target size of the adjustable conductive probe 20. By changing the target size, the heating time of the pole piece to be heated can be changed, and the heating resistance can be changed to a certain extent due to the change of the contact area between the heating surface and the pole piece to be heated.

Therefore, in an actual scene, the target size of the heating surface of the adjustable conductive probe can be determined by only carrying out calculation or matching analysis in combination with the target heating temperature when the pole piece to be heated is heated to the target heating temperature.

Referring to fig. 8, in some embodiments, step 602 includes step 802.

Step 802, determining a target size of the adjustable conductive probe based on the target heating temperature and the target heating current.

Specifically, unlike the constant current power supply described above, the current adjustable type power supply is adopted in the present embodiment, and therefore, when performing target size analysis, it is necessary to consider not only the target heating temperature but also the target heating current. Specifically, calculation or matching analysis is performed in combination with the target heating temperature and the target heating current, and the target size of the heating surface of the adjustable conductive probe 20 when the pole piece to be heated is heated to the target heating temperature is determined.

Referring to fig. 9, in some embodiments, step 802 includes steps 902 and 904.

Step 902, calculating to obtain a target heating time according to the target heating current and the target heating temperature.

Step 904, calculating to obtain the target size of the adjustable conductive probe according to the target heating time and the tape speed of the pole piece to be heated.

Specifically, the amount of joule heat required to reach the target heating temperature is calculated according to the specific heat capacity formula q=cmt, where Q represents the amount of joule heat in joule (J), C represents the specific heat capacity of the pole piece to be heated in joule per kilogram of celsius (J/(kg·c)), M represents the mass of the heating area of the pole piece to be heated in kilograms (Kg), and T represents the amount of temperature change of the pole piece to be heated in celsius (°c).

In an actual scene, the current temperature of the pole piece to be heated and the target heating temperature are combined, and the temperature variation can be calculated. The specific heat capacity can be determined and stored according to experiments, and is a fixed amount for the same type of pole piece to be heated. The heated area represents the area of the pole piece to be heated that is in contact with the heated face of the adjustable conductive probe 20, the effect of the size adjustment of the adjustable conductive probe on the heated area being negligible, or by way of estimation, the mass of the heated area being determined and present in the control assembly 42.

After that, the joule law q=i ² Rt is calculated to obtain a target heating time, where Q represents the joule heat amount, I represents the target heating current, R represents the resistance of the heating region, and t represents the target heating time. In an actual scene, the influence of the size of the heating surface on the resistance can be ignored, and under the condition that the type of the pole piece to be heated is determined, the heating resistance can be calculated according to the resistance (namely the resistivity) of the heating area corresponding to the unit area and the area of the heating area, or the heating resistance is determined in an estimation mode and stored in the controller component. After that, the joule heat, the target heating current, and the heating resistance are substituted, and the target heating time can be calculated.

Finally, the target size of the adjustable conductive probe 20 can be obtained by calculating according to t=l/v, where t represents the target heating time, v represents the running speed of the pole piece to be heated, and L represents the target size (in this embodiment, it can be understood that the equivalent length of the heating surface along the running direction is specifically).

Referring to fig. 10, in some embodiments, step 802 includes step 1002.

Step 1002, matching to obtain a target size of the adjustable conductive probe according to the target heating current, the target heating temperature, and a preset corresponding relationship between the heating temperature, the heating current and the size.

Specifically, for the same type of pole piece to be heated, the corresponding relationship between the heating temperature, the heating current and the size can be established by analysis and calculation according to experiments, and the corresponding relationship is stored in the control component 42 in the form of a graph, a table or a database. After that, the control module 42 simply substitutes the obtained target heating current and target heating temperature into the correspondence relationship to perform matching, so as to obtain the target size required at this time.

It can be appreciated that in one embodiment, when the adopted current is a constant current source, the influence of the current on the target size is not required to be considered, and the corresponding relationship between the heating temperature and the size can be established according to the experiment, so that the target size matching can be directly performed, and the method is not particularly limited.

It should be noted that the manner in which the target heating temperature and the target heating current are determined is not exclusive, and in one embodiment, the target heating current and the target heating temperature may be input by a user. In other embodiments, the target heating current and target heating temperature may also be automatically matched by the control assembly 42 according to the type of pole piece to be heated.

Accordingly, in some embodiments, the pole piece heating method further comprises determining a target heating temperature based on the type of pole piece to be heated.

And/or, in some embodiments, the pole piece heating method further comprises determining a target heating current based on the type of pole piece to be heated.

Specifically, the corresponding relation between the type of the pole piece and the target heating temperature and/or the corresponding relation between the type of the pole piece and the target heating current are stored in the control component 42, and in the actual heating process, the control component 42 can determine the target heating temperature and/or the target heating current only by matching in the corresponding relation according to the type of the pole piece to be heated which is input by a user or identified by other devices.

In order to facilitate an understanding of the technical solution of the present application, the present application will be explained below with reference to more detailed examples.

The adjustable conductive probe 20 comprises a first adjustable conductive probe 21 and a second adjustable conductive probe 22 which are identical, wherein an adjustable conductive part of the first adjustable conductive probe 21 is connected with the positive electrode of the power supply 10 through a fixed conductive part, an adjustable conductive part of the second adjustable conductive probe 22 is connected with the negative electrode of the power supply 10 through a fixed conductive part, and the power supply 10 and the probe adjusting component 41 are respectively connected with the control component 42. The adjustable conductive probe is specifically a foldable conductive probe made of carbon fiber materials, the folding amplitude of the adjustable conductive probe can be changed under the drive of the probe adjusting component 41, so that the size of the heating surface in the tape conveying direction is changed, and the output current of the power supply 10 can be adjusted according to actual requirements.

The adjustable conductive probe 20 is only arranged at the passing roller 52 between the cold pressing roller 51 and the winding roller 53, and is specifically arranged at the passing roller 52 closest to the cold pressing roller 51, the control component 42 firstly obtains the type of the pole piece to be heated, and matches the type of the pole piece to be heated in the stored corresponding relation to obtain the target heating temperature and the target heating current required at the moment. After that, according to the target heating temperature and the target heating current, the target size required by the heating surface at the moment is obtained by matching in the preset corresponding relation of the heating temperature, the heating current and the size.

Finally, the control component 42 outputs an adjustment command to the probe adjustment component 41 according to the target size, so as to adjust the sizes of the heating surfaces of the adjustable conductive probes of the first adjustable conductive probe 21 and the second adjustable conductive probe 22 to be the target size, and controls the power supply 10 to output an electric signal of the target heating current, thereby realizing the pole piece heating operation under the cold pressing process.

It should be understood that, although the steps in the flowcharts related to the embodiments described above are sequentially shown as indicated by arrows, these steps are not necessarily sequentially performed in the order indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in the flowcharts described in the above embodiments may include a plurality of steps or a plurality of stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of the steps or stages is not necessarily performed sequentially, but may be performed alternately or alternately with at least some of the other steps or stages.

Based on the same inventive concept, the embodiment of the application also provides a pole piece heating device for realizing the pole piece heating method. The implementation of the solution provided by the device is similar to that described in the above method, so the specific limitation of one or more embodiments of the pole piece heating device provided below may be referred to above for limitation of the pole piece heating method, and will not be repeated here.

Referring to fig. 11, the present application provides a pole piece heating device according to the pole piece heating system, which includes a size analysis module 112, a size adjustment module 114, and a heating control module 116.

The size analysis module 112 is used for determining a target size of the adjustable conductive probe according to the heating requirement parameter, the size adjustment module 114 is used for adjusting the size of the heating surface of the adjustable conductive probe in the tape feeding direction to the target size, and the heating control module 116 is used for controlling the power on operation so as to apply electric energy to the pole piece to be heated through the heating surface.

In some embodiments, the size analysis module 112 is further configured to determine a target size of the adjustable conductive probe based on the target heating temperature.

In some embodiments, the size analysis module 112 is further configured to determine a target size of the adjustable conductive probe based on the target heating temperature and the target heating current.

In some embodiments, the size analysis module 112 is further configured to calculate a target heating time according to the target heating current and the target heating temperature, and calculate a target size of the adjustable conductive probe according to the target heating time and a tape speed of the pole piece to be heated.

In some embodiments, the size analysis module 112 is further configured to match the target size of the adjustable conductive probe according to the target heating current, the target heating temperature, and the preset correspondence between the heating temperature, the heating current, and the size.

In some embodiments, the dimensional analysis module 112 is also configured to determine a target heating temperature based on the type of pole piece to be heated.

In some embodiments, the dimensional analysis module 112 is also configured to determine a target heating current based on the type of pole piece to be heated.

The above-mentioned each module in the pole piece heating device can be realized by all or part of software, hardware and the combination thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.

According to the pole piece heating device, the dimension of the heating surface along the tape moving direction of the pole piece to be heated can be adjusted to be the target dimension according to the actual heating demand parameters, so that accurate heating temperature control is realized, and the pole piece heating effect is improved.

In some embodiments, the present application provides a computer device, which may be a terminal, and an internal structure diagram thereof may be as shown in fig. 12. The computer device includes a processor, a memory, an input/output interface, a communication interface, a display unit, and an input means. The processor, the memory and the input/output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input/output interface. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The input/output interface of the computer device is used to exchange information between the processor and the external device. The communication interface of the computer device is used for carrying out wired or wireless communication with an external terminal, and the wireless mode can be realized through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. The computer program when executed by a processor implements a pole piece heating method. The display unit of the computer device is used for forming a visual picture, and can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, can also be a key, a track ball or a touch pad arranged on the shell of the computer equipment, and can also be an external keyboard, a touch pad or a mouse and the like.

It will be appreciated by those skilled in the art that the structure shown in FIG. 12 is merely a block diagram of some of the structures associated with the present inventive arrangements and is not limiting of the computer device to which the present inventive arrangements may be applied, and that a particular computer device may include more or fewer components than shown, or may combine some of the components, or have a different arrangement of components.

In some embodiments, the present application provides a computer device comprising a memory and a processor, the memory having stored therein a computer program, the processor when executing the computer program performing the steps of:

the method comprises the steps of determining a target size of an adjustable conductive probe according to heating requirement parameters, adjusting the size of a heating surface of the adjustable conductive probe in a tape feeding direction to be the target size, and controlling a power supply to start to operate so as to apply electric energy to a pole piece to be heated through a heating surface.

In one embodiment, the processor, when executing the computer program, further performs the step of determining a target size of the adjustable conductive probe based on the target heating temperature.

In one embodiment, the processor when executing the computer program further performs the step of determining a target size of the adjustable conductive probe based on the target heating temperature and the target heating current.

In one embodiment, the processor when executing the computer program further performs the steps of calculating a target heating time based on the target heating current and the target heating temperature, and calculating a target size of the adjustable conductive probe based on the target heating time and a tape speed of the pole piece to be heated.

In one embodiment, the processor when executing the computer program further performs the step of matching the target size of the adjustable conductive probe according to the target heating current, the target heating temperature, and the preset correspondence between the heating temperature, the heating current and the size.

In one embodiment, the processor when executing the computer program further performs the step of determining a target heating temperature based on the type of pole piece to be heated.

In one embodiment, the processor when executing the computer program further performs the step of determining a target heating current based on the type of pole piece to be heated.

In some embodiments, the present application provides a computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of:

In one embodiment, the computer program when executed by the processor further performs the step of determining a target size of the adjustable conductive probe based on the target heating temperature.

In one embodiment, the computer program when executed by the processor further performs the step of determining a target size of the adjustable conductive probe based on the target heating temperature and the target heating current.

In one embodiment, the computer program when executed by the processor further performs the steps of calculating a target heating time based on the target heating current and the target heating temperature, and calculating a target size of the adjustable conductive probe based on the target heating time and a tape speed of the pole piece to be heated.

In one embodiment, the computer program when executed by the processor further performs the step of matching the target size of the adjustable conductive probe based on the target heating current, the target heating temperature, and a preset correspondence between the heating temperature, the heating current, and the size.

In one embodiment, the computer program when executed by the processor further performs the step of determining a target heating temperature based on the type of pole piece to be heated.

In one embodiment, the computer program when executed by the processor further performs the step of determining a target heating current based on the type of pole piece to be heated.

In some embodiments, the application provides a computer program product comprising a computer program which, when executed by a processor, performs the steps of:

Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, database, or other medium used in embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high density embedded nonvolatile Memory, resistive random access Memory (ReRAM), magneto-resistive random access Memory (Magnetoresistive Random Access Memory, MRAM), ferroelectric Memory (Ferroelectric Random Access Memory, FRAM), phase change Memory (PHASE CHANGE Memory, PCM), graphene Memory, and the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, and the like. By way of illustration, and not limitation, RAM can be in various forms such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), etc. The databases referred to in the embodiments provided herein may include at least one of a relational database and a non-relational database. The non-relational database may include, but is not limited to, a blockchain-based distributed database, and the like. The processor referred to in the embodiments provided in the present application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, or the like, but is not limited thereto.

According to the computer equipment, the storage medium and the computer program product, the dimension of the heating surface along the tape moving direction of the pole piece to be heated can be adjusted to be the target dimension according to the actual heating demand parameters, so that the accurate heating temperature control is realized, and the pole piece heating effect is improved.

It should be noted that the above embodiments are only used to illustrate the technical solution of the present application, but not to limit the technical solution of the present application, and although the detailed description of the present application is given with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application, and all the modifications or substitutions are included in the scope of the claims and the specification of the present application. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A pole piece heating system, comprising:

A power supply;

the adjustable conductive probe is connected with the power supply and comprises a heating surface which is in contact with the pole piece to be heated, and the dimension of the heating surface along the tape moving direction of the pole piece to be heated can be adjusted to be the target dimension determined by the heating requirement parameter.

2. The pole piece heating system of claim 1, wherein the adjustable conductive probe comprises a first adjustable conductive probe and a second adjustable conductive probe, the first adjustable conductive probe being connected to a positive pole of the power source and the second adjustable conductive probe being connected to a negative pole of the power source.

3. The pole piece heating system of claim 1 or 2, further comprising a probe adjustment assembly and a control assembly, the probe adjustment assembly being connected to the adjustable conductive probe, the control assembly being connected to the probe adjustment assembly and the power supply.

4. A pole piece heating system according to claim 1 or 2, wherein the adjustable conductive probe comprises a foldable conductive probe that is foldable in the direction of travel of the pole piece to be heated.

5. A pole piece heating system according to claim 1 or 2, wherein the adjustable conductive probe comprises a flexible conductive probe.

6. A pole piece heating system according to claim 1 or 2, wherein the power source comprises a current adjustable power source.

7. The pole piece cold pressing equipment is characterized by comprising a cold pressing roller, a passing roller, a winding roller and the pole piece heating system according to any one of claims 1-6, wherein the cold pressing roller, the passing roller and the winding roller are used for conveying the pole piece to be heated, the passing roller is arranged between the cold pressing roller and the winding roller, and the adjustable conductive probe is arranged on the passing roller.

8. The apparatus of claim 7, wherein the number of said passing rollers is plural, and said adjustable conductive probe is disposed on one of said passing rollers adjacent to said cold-pressing roller.

9. A pole piece heating method of a pole piece heating system according to any one of claims 1-6, comprising:

Determining a target size of the adjustable conductive probe according to the heating demand parameter;

adjusting the dimension of the heating surface of the adjustable conductive probe in the tape running direction to the target dimension;

And controlling the power supply to be started to operate so as to apply electric energy to the pole piece to be heated through the heating surface.

10. The pole piece heating method of claim 9, wherein the determining the target size of the adjustable conductive probe based on the heating demand parameter comprises:

And determining the target size of the adjustable conductive probe according to the target heating temperature.

11. The pole piece heating method of claim 9, wherein the determining the target size of the adjustable conductive probe based on the heating demand parameter comprises:

and determining the target size of the adjustable conductive probe according to the target heating temperature and the target heating current.

12. The pole piece heating method of claim 11, wherein determining the target size of the adjustable conductive probe based on the target heating temperature and the target heating current comprises:

Calculating to obtain target heating time according to the target heating current and the target heating temperature;

And calculating the target size of the adjustable conductive probe according to the target heating time and the tape moving speed of the pole piece to be heated.

13. The pole piece heating method of claim 11, wherein determining the target size of the adjustable conductive probe based on the target heating temperature and the target heating current comprises:

And matching to obtain the target size of the adjustable conductive probe according to the target heating current, the target heating temperature and the corresponding relation of the preset heating temperature, the heating current and the size.

14. The pole piece heating method of claim 11, further comprising determining a target heating temperature based on the type of pole piece to be heated and/or determining a target heating current based on the type of pole piece to be heated.

15. A pole piece heating device of a pole piece heating system according to any of claims 1-6, comprising:

The size analysis module is used for determining the target size of the adjustable conductive probe according to the heating requirement parameters;

The size adjusting module is used for adjusting the size of the heating surface of the adjustable conductive probe in the tape moving direction to be the target size;

and the heating control module is used for controlling the power supply to be started and operated so as to apply electric energy to the pole piece to be heated through the heating surface.