Electrode-sheet drying device and battery production apparatus

Abstract

The present application relates to an electrode-sheet drying device and a battery production apparatus. The electrode-sheet drying device comprises: a heating assembly, which comprises a heat-insulating cover and a plurality of heating units arranged at intervals in the heat-insulating cover, all the heating units being used for heating an electrode sheet, and the heating assembly further comprising air extraction pipes, which are in communication with a cavity formed by the heat-insulating cover so as to extract water vapor from the cavity; and a conveying mechanism, which comprises a conveying member for movably passing through the heat-insulating cover, wherein the conveying member is used for carrying and conveying the electrode sheet, so as to drive the electrode sheet to enter or leave the heat-insulating cover, a vacuum cavity is formed inside the conveying member, and suction holes in communication with the vacuum cavity are provided in the surface of the conveying member. In the electrode-sheet drying device of the present application, by means of the coordinated configurations of the heating assembly and the conveying mechanism, the electrode sheet and the conveying member enter the heat-insulating cover while maintaining a state of relative stillness, thereby reducing the probability of the electrode sheet slipping and deviating relative to the conveying member in the heat-insulating cover, and enabling moisture on the surface of the electrode sheet to more efficiently evaporate, thus improving the effect of drying the electrode sheet.

Description

Pole piece drying device and battery production equipment

[0001] Cross-reference to related applications

[0002] This application is based on Chinese Patent Application No. 202421487385.4, filed on June 27, 2024, entitled “Pole piece drying device and battery production equipment”, which is incorporated by reference in its entirety into this application. TECHNICAL FIELD

[0003] The present application relates to the technical field of batteries, and in particular to a pole piece drying device and a battery production equipment. BACKGROUND

[0004] In the process of battery production, after the battery pole piece is subjected to processes such as coating, baking, and die cutting, it is transported to a lamination station for lamination forming. During the transportation process, the battery pole piece absorbs moisture in the air, which reduces the electrical conductivity of the pole piece and affects the performance of the battery.

[0005] In related technologies, an oven is generally provided on the conveying path of the pole piece, and the oven heats and dries the pole piece during the conveying process. However, due to structural defects of the equipment used to convey the pole piece, the position of the pole piece is prone to relative deviation and misalignment during the process of passing through the oven, resulting in poor drying effect of the pole piece by the oven.

[0006] SUMMARY

[0007] The present application aims to at least solve one of the technical problems existing in some cases. To this end, the present application provides a pole piece drying device and a battery production equipment, which can dry the pole piece before lamination forming, make the moisture on the surface of the pole piece more efficiently evaporate, improve the drying effect of the pole piece, improve the electrical conductivity of the pole piece, and thus improve the performance of the battery.

[0008] In a first aspect, an embodiment of the present application provides a pole piece drying device, comprising:

[0009] A heating assembly, comprising a heat shield and a plurality of heating units spaced apart in the heat shield, all the heating units being used to heat the pole piece, the heating assembly further comprising an air extraction pipe communicating with a cavity formed by the heat shield to extract water vapor in the cavity;

[0010] A conveying mechanism, comprising a conveying member movably passing through the heat shield, the conveying member being used to carry and convey the pole piece to drive the pole piece to enter or leave the heat shield;

[0011] The inside of the conveying member forms a vacuum cavity, and the surface of the conveying member is provided with suction holes communicating with the vacuum cavity.

[0012] According to the pole piece drying device provided in the first aspect of the present application, at least the following beneficial effects are achieved.

[0013] The pole piece drying device provided in the present application can reduce the probability of the pole piece slipping or deviating from the conveying member in the heat insulation cover by allowing the conveying member to carry and convey the pole piece and keeping the pole piece in a relatively static state with the conveying member when entering the heat insulation cover, and can make the pole piece enter the heat insulation cover of the heating assembly, so that all the heating units in the heat insulation cover can heat the pole piece more uniformly and stably, and the moisture on the surface of the pole piece can be more efficiently volatilized, thereby improving the drying effect on the pole piece, allowing the pole piece to be kept in a relatively dry state for laminating and forming, improving the electrical conductivity of the pole piece, and further improving the performance of the battery.

[0014] In some embodiments, the pole piece drying device further comprises a dust removal mechanism configured to remove dust on the surface of the conveying member.

[0015] In this way, the dust removal mechanism can remove dust on the surface of the conveying member during use or shutdown of the conveying member, so that the surface of the conveying member can be kept clean, and the risk of short circuit of the pole piece caused by dust on the surface of the conveying member falling and adhering to the surface of the pole piece during use can be reduced.

[0016] In some embodiments, the dust removal mechanism comprises a dust extraction cover and a brush assembly arranged in the dust extraction cover, the brush assembly being configured to sweep the surface of the conveying member, and the dust extraction cover being configured to receive dust falling from the surface of the conveying member and extract the dust.

[0017] In this way, dust particles on the surface of the conveying member can be removed synchronously during use of the conveying member, and the risk of short circuit of the pole piece caused by dust on the surface of the conveying member falling and adhering to the surface of the pole piece during use can be further reduced.

[0018] In some embodiments, the heating assembly further comprises an air supply mechanism arranged in the heat insulation cover, the air supply mechanism being configured to form an air flow in the heat insulation cover.

[0019] In this way, the air supply mechanism can disturb the air in the heat insulation cover by rotating the blades thereof, so that a rotating air flow is formed in the heat insulation cover, the volatilization of the moisture on the pole piece is accelerated, and the heating and drying efficiency on the pole piece is improved.

[0020] In some embodiments, the heating unit is configured as an infrared heating pipe, and the infrared heating pipe is configured to generate infrared rays to heat the pole piece.

[0021] In this way, all the heating units can directly radiate heat to the pole piece, without the need to transmit heat to the pole piece through the air in the heat shield, so that the heating speed of the pole piece is faster, and the moisture on the surface of the pole piece can be rapidly volatilized; in addition, the heating radiation area formed by all the heating units is wide, and the heat radiation can be uniformly transmitted to each position on the surface of the pole piece, so that the temperature of the surface of the pole piece is more uniform, and the moisture on the surface of the pole piece can be more sufficiently removed, thereby effectively improving the electrical conductivity of the pole piece.

[0022] In some embodiments, the heating assembly further comprises a reflecting plate, which is arranged in the heat shield and located between the top of the heat shield and all the heating units, and the vertical projection of all the heating units on the reflecting plate is located in the plane where the reflecting plate is located.

[0023] In this way, most of the infrared light emitted by all the heating units can be reflected by the reflecting plate to the surface of the pole piece, so that the radiant heat of all the heating units is efficiently utilized to heat the surface of the pole piece, and the moisture on the surface of the pole piece is further rapidly volatilized, thereby improving the drying efficiency of the pole piece.

[0024] In some embodiments, a plurality of guide holes for air flow are formed in the reflecting plate.

[0025] In this way, the air flow can enter each area of the heat shield through the guide holes in the reflecting plate, reducing the blocking effect of the reflecting plate on the air flow in the heat shield, and enhancing the heat dissipation effect of the air flow on the reflecting plate, thereby reducing the risk of structural damage of the reflecting plate due to excessive temperature.

[0026] In some embodiments, a temperature sensing unit is arranged in the heat shield, and the temperature sensing unit is configured to detect the temperature in the heat shield, and the heating unit is in communication connection with the temperature sensing unit, so as to adjust the heating power of the heating unit according to the detection signal of the temperature sensing unit.

[0027] In this way, the heating power of the heating unit can be adjusted in real time during the heating and drying process of the pole piece, so as to improve the drying efficiency of the pole piece while reducing the risk of oxidation of the surface of the pole piece due to overheating.

[0028] In some embodiments, the conveying mechanism further comprises a base frame, all the heating units are detachably mounted on the base frame, and the heat shield is rotatable relative to the base frame to cover or expose all the heating units.

[0029] In this way, the single heating unit can be individually disassembled and replaced, and the heating assembly as a whole can also be disassembled, so as to facilitate the adjustment of the position of the heating assembly relative to the conveying mechanism and meet the on-site use requirements.

[0030] In some embodiments, the pole piece drying device comprises a locking mechanism, which is configured to lock or release the heat shield relative to the base frame.

[0031] In this way, the heat shield is locked to the base frame by the locking mechanism, so that the heat shield maintains the state of covering all the heating units, reduces the probability of heat loss from the heat shield, further accelerates the drying rate of the pole piece, and improves the safety performance of the heating assembly.

[0032] In a second aspect, the embodiments of the present application provide a battery production equipment, which comprises the pole piece drying device.

[0033] According to the battery production equipment of the second aspect of the embodiments of the present application, at least the following beneficial effects are achieved:

[0034] The battery production equipment of the embodiments of the present application is provided with the pole piece drying device, so it also has the same technical effects as the pole piece drying device. That is, through the cooperation of the heating assembly and the conveying mechanism, the conveying member carries and conveys the pole piece, so that the pole piece and the conveying member remain in a relatively static state and enter the heat shield, reducing the probability of the pole piece slipping and deviating from the conveying member in the heat shield. The pole piece enters the heat shield of the heating assembly, so that all the heating units in the heat shield heat the pole piece more uniformly and stably, the water on the surface of the pole piece can be more efficiently volatilized, the drying effect of the pole piece is improved, the pole piece remains in a relatively dry state for laminating, the electrical conductivity of the pole piece is improved, and the performance of the battery is improved.

[0035] In some embodiments, the battery production equipment further comprises:

[0036] The leading mechanism is used to pull the pole piece material belt to move in a predetermined direction, and the end of the leading mechanism is connected to the conveying mechanism.

[0037] The cutting mechanism is arranged between the leading mechanism and the conveying mechanism, and is used to cut the pole piece material belt into multiple pole pieces.

[0038] In this way, through the cooperation of the leading mechanism and the cutting mechanism, the pole piece material belt is cut into multiple pole pieces during the movement of the pole piece material belt, so that the pole piece moves to the position of the heating assembly in the shape required for laminating and drying, and then the pole piece remains in a dry state for laminating, further improving the electrical conductivity of the pole piece and the performance of the battery.

[0039] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented according to the content of the description, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly introduced as follows. Obviously, the drawings described below are only some of the embodiments of the present application, and for those of ordinary skill in the art, other drawings can be obtained based on the drawings without any creative effort. In the drawings:

[0041] Fig. 1 is a structural schematic diagram of a pole piece drying device according to an embodiment of the present application.

[0042] Fig. 2 is an axonometric structural schematic diagram of the pole piece drying device according to an embodiment of the present application.

[0043] Fig. 3 is a partial structural schematic diagram of a heating assembly according to an embodiment of the present application.

[0044] Fig. 4 is another axonometric structural schematic diagram of the pole piece drying device according to an embodiment of the present application.

[0045] Fig. 5 is an enlarged view of a portion of Fig. 4.

[0046] Fig. 6 is another partial structural schematic diagram of the heating assembly according to an embodiment of the present application.

[0047] Fig. 7 is a structural schematic diagram of a battery production device according to an embodiment of the present application.

[0048] Legend of reference signs: conveying mechanism 100; conveying member 110; suction hole 111; base frame 120; heating assembly 200; heat insulation cover 210; heating unit 220; air supply mechanism 230; reflecting plate 240; flow guide hole 241; air extraction pipe 250; mounting frame 260; dust removal mechanism 300; dust extraction cover 310; locking mechanism 400; limiting plate 410; electronic lock 420; tape guiding mechanism 500; driving roller 510; driven roller 520; pole piece tape 600; pole piece 700; cutting mechanism 800; feeding mechanism 900; box 10; air inlet 11; air outlet 12; preset direction X. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without any creative effort belong to the scope of protection of the present application.

[0050] In the description of the application, it should be understood that, if there are these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0051] In addition, if there are these terms "first", "second", these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0052] In this application, unless otherwise explicitly specified and limited, if there are terms such as "mounting", "connecting", "connecting", "fixing" and the like, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0053] In this application, unless otherwise explicitly specified and limited, if there are similar descriptions such as "first feature on or under the second feature", the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0054] It is to be noted that when an element is referred to as being "fixed" or "set" on another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions, if used, are used for explanation only and are not intended to be limiting.

[0055] At present, from the development of market situation, the application of battery is more and more widely. The battery is not only applied to the energy storage power system of water power, fire power, wind power and solar power station, but also widely applied to the electric bicycle, electric motorcycle, electric vehicle and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of battery, the demand of its market is also increasing.

[0056] The battery is composed of one or more battery monomers. For each battery, the plurality of battery monomers constituting it can be connected in series or in parallel or in mixed connection. Among them, mixed connection means that there are series connection and parallel connection in the plurality of battery monomers.

[0057] The battery monomer is the smallest unit of the battery, and in the structure of the battery monomer, the shell, the electrolyte and the electrode assembly are included. The electrode assembly is the component where the electrochemical reaction occurs in the battery monomer, and the electrode assembly includes the positive plate, the negative plate and the separator. The shell can include one or more electrode assemblies. The electrode assembly is mainly formed by winding or stacking the positive plate and the negative plate, and the separator is usually arranged between the positive plate and the negative plate.

[0058] The shell is a structure with one end opening and hollow inside. The electrode assembly is arranged inside the shell, and the end cover is arranged at the opening of the shell. The end cover is closed to form the internal environment of the battery monomer at the opening. Of course, the end cover and the shell can also be integrated. In some examples, the end cover and the shell can form a common connecting surface before other components enter the shell. When it is necessary to encapsulate the inside of the shell, the end cover is closed to the shell. The shell can be various shapes and various sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. In some examples, the shape of the shell can be determined according to the specific shape and size of the electrode assembly. The material of the shell can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. The embodiments of the present application do not specially limit this.

[0059] In the production process of the laminated battery, the battery pole piece needs to pass through coating, baking, die cutting and other processes in turn, and finally is transferred to the laminating station for laminating forming. The battery pole piece will absorb moisture in the air during the pre-laminating process and the transfer process to the laminating station, resulting in a decrease in the conductivity of the pole piece and affecting the performance of the battery.

[0060] In the related art, an oven is generally arranged on the conveying path of the pole piece, and the oven heats and dries the pole piece in the conveying process. However, due to the structural defects of the equipment for conveying the pole piece, the position of the pole piece is prone to relative deviation and misalignment during the process of passing through the oven, resulting in poor drying effect of the pole piece by the oven.

[0061] Therefore, in view of the poor drying effect of the pole piece by the oven, the pole piece drying device provided in one or more embodiments of the present application is configured by cooperating the heating assembly and the conveying mechanism. The conveying member carries and conveys the pole piece, so that the pole piece and the conveying member remain in a relatively static state when entering the heat shield, reducing the probability of the pole piece slipping and deviating relative to the conveying member in the heat shield. The pole piece enters the heat shield of the heating assembly, so that all the heating units in the heat shield heat the pole piece more uniformly and stably, and the moisture on the surface of the pole piece can be more efficiently volatilized, improving the drying effect of the pole piece. The pole piece remains in a relatively dry state for laminating forming, improving the conductivity of the pole piece, and further improving the performance of the battery.

[0062] Referring to FIGS. 1, 2 and 3, the pole piece drying device provided in the embodiments of the present application includes a heating assembly 200 and a conveying mechanism 100.

[0063] The heating assembly 200 includes a heat shield 210 and a plurality of heating units 220 arranged in the heat shield 210. All the heating units 220 are used to heat the pole piece 700.

[0064] The conveying mechanism 100 includes a conveying member 110 movably passing through the heat shield 210. The conveying member 110 is used to carry and convey the pole piece 700 to drive the pole piece 700 to enter or leave the heat shield 210.

[0065] The conveying member 110 has a vacuum cavity formed in the interior thereof, and the surface of the conveying member 110 is provided with suction holes 111 in communication with the vacuum cavity.

[0066] It should be noted that in the present application, the heating assembly 200 can be arranged integrally on the conveying path of the pole piece 700. In the heating assembly 200, the heat shield 210 can be but is not limited to a cuboid, a cylindrical or other cover structure. The heat shield 210 has a heat insulation function to reduce the heat loss in the heat shield.

[0067] The heat shield 210 is open at the bottom, and the bottom of the heat shield 210 and the surface of the conveying member 110 form a gap space for the pole piece 700 to pass through. The conveying member 110 is a closed annular belt, which is driven to rotate around itself by a motor, a speed reducer, a synchronous wheel and the like cooperating structure, so as to drive the pole piece 700 carried thereon to freely pass through the gap space to enter or leave the heat shield 210. The gap space for the pole piece 700 to pass through is formed between the heat shield 210 and the conveying member 110, so that the conveying member 110 can drive the pole piece 700 carried thereon to enter or leave the heat shield 210.

[0068] All the heating units 220 arranged in the heat shield 210 can be, but are not limited to, infrared heating bodies, PTC heating bodies, electromagnetic induction heating bodies, laser heating bodies and the like heating structures. Exemplarily, in the present application, the heating unit 220 is an infrared heating pipe, which heats the pole piece 700 by radiating infrared rays generated by the infrared heating pipe to the pole piece 700, so as to rapidly evaporate the moisture on the pole piece 700, thereby removing the moisture on the pole piece 700 and improving the electrical conductivity of the pole piece 700.

[0069] The conveying member 110 includes, but is not limited to, a conveying belt, a linear module and the like power conveying mechanism. The front end and the tail end of the conveying member 110 can be respectively connected to a pole piece unloading station and a pole piece stacking station. A drying station is arranged on the conveying path of the pole piece 700, and the drying station is located between the pole piece unloading station and the pole piece stacking station. The heating assembly 200 is arranged at the drying station.

[0070] The pole piece unloading mechanism at the pole piece unloading station unloads single or multiple pole pieces 700 to the conveying member 110. The conveying member 110 stably receives the pole piece 700 and drives the pole piece 700 to move in a predetermined direction by the power of the conveying member 110, so as to drive the pole piece 700 to move to the drying station, so that the pole piece 700 enters the heat shield 210 of the heating assembly 200. After the pole piece 700 is heated and dried by all the heating units 220 in the heat shield 210, the conveying member 110 drives the pole piece 700 to leave the heat shield 210, and then drives the pole piece 700 to move to the pole piece stacking station, so that the pole piece 700 is subjected to subsequent pole piece stacking and forming.

[0071] Exemplarily, the conveying member 110 is configured as a vacuum belt, which is an annular closed body structure and has a vacuum cavity formed inside. At least part of the surface of the conveying member 110 is provided with an array of adsorption holes 111, which are in communication with the vacuum cavity, so that the adsorption holes 111 have negative pressure adsorption capability.

[0072] All the heating units 220 are configured as infrared heating pipes, all the infrared heating pipes are arranged in the heat shield 210 in the same direction at intervals, the heating end of all the infrared heating pipes is the light-emitting end of the infrared heating pipe, the infrared heating pipe emits infrared rays towards the pole piece 700 on the conveying member 110, the pole piece 700 absorbs the infrared rays and converts them into heat energy, improves the temperature of the pole piece 700 itself, and makes the water on the surface of the pole piece 700 evaporate quickly.

[0073] It can be understood that when the pole piece 700 is carried on the surface of the conveying member 110 distributed with the adsorption holes 111, the adsorption holes 111 adsorb and fix the pole piece 700 on the surface of the conveying member 110, so that the pole piece 700 and the conveying member 110 keep a relatively static state to enter the heat shield 210, reduce the probability of the pole piece 700 slipping and deviating in the heat shield 210 relative to the conveying member 110, improve the uniformity and stability of the heating unit 220 heating the pole piece 700, and make the water on the surface of the pole piece 700 evaporate more efficiently.

[0074] When the pole piece drying device of the embodiment of the application dries the pole piece 700, the conveying member 110 of the conveying mechanism 100 carries the pole piece 700 and drives the pole piece 700 to enter the heat shield 210, all the heating units 220 arranged in the heat shield 210 heat the pole piece 700, so that the pole piece 700 is heated to make the water on the surface of the pole piece 700 evaporate quickly, reduce the water on the pole piece 700, and improve the conductivity of the pole piece 700.

[0075] Moreover, in the process of the conveying member 110 driving the pole piece 700 to enter the heat shield 210, the adsorption holes 111 on the surface of the conveying member 110 adsorb and fix the pole piece 700, so that the pole piece 700 and the conveying member 110 keep a relatively static state to enter the heat shield 210, reduce the probability of the pole piece 700 slipping and deviating in the heat shield 210 relative to the conveying member 110, improve the uniformity and stability of the heating unit 220 heating the pole piece 700, and make the water on the surface of the pole piece 700 evaporate more efficiently.

[0076] Then, the conveying member 110 drives the dried pole piece 700 to leave the heat shield 210 and enter the next lamination station, so that the pole piece 700 is laminated in a dry state to improve the conductivity of the pole piece 700, and further improve the performance of the battery.

[0077] Therefore, by the cooperation of the heating assembly 200 and the conveying mechanism 100, the conveying member 110 carries and conveys the pole piece 700, so that the pole piece 700 and the conveying member 110 remain in a relatively static state and enter the heat shield 210, thereby reducing the probability of slippage and deviation of the pole piece 700 in the heat shield 210 relative to the conveying member 110, and enabling the pole piece 700 to enter the heat shield 210 of the heating assembly 200, so that all the heating units 220 in the heat shield 210 can uniformly and stably heat the pole piece 700, and the moisture on the surface of the pole piece 700 can be more efficiently volatilized, thereby improving the drying effect on the pole piece 700, so that the pole piece can be kept in a relatively dry state for lamination forming, improving the electrical conductivity of the pole piece, and further improving the performance of the battery.

[0078] In some examples, referring to FIGS. 2, 4 and 5, the pole piece drying device further comprises a dust removal mechanism 300 for removing dust on the surface of the conveying member 110.

[0079] It should be noted that, in the long-term use process, the surface of the conveying member 110 will be attached with dust particles scraped from the pole piece 700 due to long-term contact and friction with the pole piece 700, and the dust particles scattered on the surface of the pole piece 700 will easily cause short circuit between the pole piece and an adjacent pole piece in the use process.

[0080] Therefore, the dust removal mechanism 300 can be used to remove dust on the surface of the conveying member 110 during use or shutdown of the conveying member 110, so that the surface of the conveying member 110 can be kept clean, and the risk of short circuit of the pole piece 700 in the use process caused by scattering and attachment of dust on the surface of the pole piece 700 can be reduced.

[0081] In some examples, referring to FIG. 5, the dust removal mechanism 300 comprises a dust extraction cover 310 and a brush assembly (not shown in the figure) arranged in the dust extraction cover 310, the brush assembly being used to sweep the surface of the conveying member 110, and the dust extraction cover 310 being used to receive dust falling from the surface of the conveying member 110 and extract the dust.

[0082] In some examples, the brush assembly comprises a brush roller and a driving member for driving the brush roller to rotate around itself, and the driving member can be but is not limited to a rotating driving mechanism such as a motor or a motor.

[0083] The first opening of the dust extraction cover 310 is towards the conveying member 110, and the length of the first opening is adapted to the width of the conveying member 110. The brush roller is arranged at the first opening and is adapted to the length of the first opening. In this way, the brushing area of the brush roller can cover any position in the width direction of the conveying member 110, and the efficiency of brushing the dust on the surface of the conveying member 110 is improved.

[0084] In addition, the second opening of the dust extraction cover 310 is used to connect a negative pressure mechanism. The negative pressure mechanism extracts the dust falling from the surface of the conveying member 110 into the dust extraction cover 310 through the dust extraction cover 310, so that the dust particles on the surface of the conveying member 110 are removed.

[0085] It is not difficult to understand that by arranging the dust removal mechanism 300 as a combination of the dust extraction cover 310 and the brush assembly, the brush assembly brushes off the dust particles on the surface of the conveying member 110, and the dust extraction cover 310 receives the dust particles falling from the surface of the conveying member 110 and extracts the dust particles. In this way, the dust particles on the surface of the conveying member 110 are removed synchronously during the use of the conveying member 110, and the risk of short circuit of the pole piece 700 caused by the dust on the surface of the pole piece 700 falling and adhering to the surface of the pole piece 700 during use is further reduced.

[0086] In the embodiments of the present application, the conveying member 110 can be configured as a non-metal insulating belt, such as a rubber belt. On the one hand, the metal dust generated by the contact friction between the conveying member 110 and the pole piece 700 is reduced. On the other hand, the static friction between the conveying member 110 and the pole piece 700 is increased, and the probability of the pole piece 700 slipping and deviating relative to the conveying member 110 in the heat shield 210 is further reduced. In addition, the heat conduction between the pole piece 700 and the conveying member 110 is also reduced, so that the pole piece 700 can be efficiently heated and dried by the heating unit 220 in the heat shield 210.

[0087] Referring to FIGS. 2, 3 and 4, in some embodiments of the present application, the heating assembly 200 further comprises an air supply mechanism 230 arranged in the heat shield 210. The air supply mechanism 230 is used to form an air flow in the heat shield 210.

[0088] In some examples, the air supply mechanism 230 can be, but is not limited to, a fan, a blower or the like. The air supply mechanism 230 is arranged at the top of the heat shield 210, and the air outlet end of the air supply mechanism 230 is towards the conveying member 110 on the conveying mechanism 100. The air supply mechanism 230 has two air supply mechanisms 230 which are spaced apart and arranged at the top of the heat shield 210. The two air supply mechanisms 230 work synchronously to quickly form a rotating air flow in the heat shield 210. The rotating air flow flows along the surface of the pole piece 700 and cooperates with the heating of the pole piece 700 by the heating unit 220, so that the evaporation of the moisture on the pole piece 700 is accelerated.

[0089] It can be understood that the air supply mechanism 230 disturbs the air in the heat shield 210 by rotating the blades thereof, so that the heat shield 210 forms a rotating air flow, accelerates the evaporation of the moisture on the pole piece 700, and improves the heating and drying efficiency of the pole piece 700.

[0090] Referring to FIG. 3, in some embodiments of the present application, the heating unit 220 is configured as an infrared heating tube for generating infrared rays to heat the pole piece 700.

[0091] It can be easily understood that when the heating unit 220 is an infrared heating tube, the heating unit 220 emits infrared rays toward the surface corresponding to the conveying member 110. When the conveying member 110 drives the pole piece 700 carried thereon into the heat shield 210, the heat radiation formed by the infrared rays emitted by the heating unit 220 heats the pole piece 700, so that the moisture on the pole piece 700 is rapidly evaporated, thereby removing the moisture on the pole piece 700 and improving the electrical conductivity of the pole piece 700.

[0092] Compared with a common PTC heating tube, when all the heating units 220 are configured as infrared heating tubes, all the heating units 220 can directly radiate heat to the pole piece 700, without the need to transmit heat to the pole piece 700 through the air in the heat shield 210, so that the heating speed of the pole piece 700 is faster, and the moisture on the surface of the pole piece 700 can be rapidly evaporated. Moreover, the heat radiation region formed by all the heating units 220 has a wide range, and the heat radiation can be uniformly transmitted to each position on the surface of the pole piece 700, so that the surface temperature of the pole piece 700 is relatively uniform, the moisture on the surface of the pole piece 700 is sufficiently removed, and the electrical conductivity of the pole piece 700 is effectively improved.

[0093] In some examples, referring to FIGS. 2, 3 and 6, the heating assembly 200 further comprises a reflecting plate 240, which is arranged in the heat shield 210 and located between the top of the heat shield 210 and all the heating units 220, and the vertical projection of all the heating units 220 relative to the reflecting plate 240 is located in the plane where the reflecting plate 240 is located.

[0094] In some examples, the surface of the reflecting plate 240 close to all the heating units 220 is polished with high reflectivity, so that the infrared light emitted by the heating unit 220 toward the top of the heat shield 210 can be reflected by the reflecting plate 240 and irradiate to the surface of the pole piece 700 at the bottom of the heat shield 210.

[0095] The vertical projection of all the heating units 220 relative to the reflecting plate 240 being located in the plane where the reflecting plate 240 is located can be understood as that the reflecting surface formed by the reflecting plate 240 can cover all the heating units 220 below.

[0096] In this way, most of the infrared light emitted by all the heating units 220 can be reflected by the reflection plate 240 to the surface of the pole piece 700, efficiently utilizing the radiant heat of all the heating units 220 to heat the surface of the pole piece 700, further rapidly evaporating the moisture on the surface of the pole piece 700, and improving the drying efficiency of the pole piece 700.

[0097] In some examples, referring to FIG. 6, a plurality of guide holes 241 for air flow are formed on the reflection plate 240.

[0098] In some examples, the guide holes 241 can be, but are not limited to, round holes, square holes, triangular holes, etc. All the guide holes 241 are arrayed on the reflection plate 240, and each heating unit 220 corresponds to a region of the reflection plate 240 with guide holes.

[0099] By forming the guide holes 241 on the reflection plate 240, when the air blowing mechanism 230 disturbs the air in the heat shield 210 by rotating itself, the air flow formed can enter each region of the heat shield 210 through the guide holes 241 on the reflection plate 240, reducing the blocking effect of the reflection plate 240 on the air flow in the heat shield 210, and further enhancing the heat dissipation effect of the air flow on the reflection plate 240, reducing the risk of structural damage of the reflection plate 240 due to excessively high temperature.

[0100] In addition, it should be noted that when the heating unit 220 is an infrared heating tube, the infrared heating tube includes a tube body and an infrared light source arranged in the tube body. The inner wall of the tube body near the top of the heat shield 210 is attached with a reflection layer. The reflection layer reflects the infrared light emitted by the infrared light source towards the top of the heat shield 210 to the surface of the pole piece 700 located at the bottom, improving the energy utilization rate and rapidly evaporating the moisture on the surface of the pole piece 700. When the infrared heating tube works for a long time, the temperature of the reflection layer on the inner wall of the tube body increases more obviously than the temperature of the rest of the tube body.

[0101] Therefore, by forming the guide holes 241 on the reflection plate 240, the air flow can flow to the infrared heating tube through the guide holes 241, thereby achieving the heat dissipation effect of the reflection layer on the infrared heating tube, reducing the probability of structural damage of the infrared heating tube due to excessively high temperature.

[0102] It is easy to understand that when the heating unit 220 heats and dries the pole piece 700, the moisture on the surface of the pole piece 700 will be heated and evaporated into water vapor, which will enter the cavity formed by the heat shield 210.

[0103] Therefore, referring to FIGS. 1 and 4, in some embodiments of the present application, the heating assembly 200 further includes an air extraction pipe 250, which communicates with the cavity formed by the heat shield 210 to extract the water vapor in the cavity.

[0104] In some examples, the two air exhaust pipes 250 are arranged on both sides of the top of the heat shield 210, and one end of each of the air exhaust pipes 250 is connected to the cavity formed by the heat shield 210, and the other end is connected to the negative pressure mechanism. In this way, the water vapor in the cavity formed by the heat shield 210 can be effectively exhausted.

[0105] It can be understood that, by arranging the air exhaust pipes 250 connected to the cavity formed by the heat shield 210, the air exhaust pipes 250 can exhaust the water vapor evaporated from the surface of the pole piece 700 in time when the heating unit 220 heats and dries the pole piece 700, thereby further accelerating the drying rate of the pole piece 700.

[0106] In some embodiments of the present application, a temperature sensing unit (not shown in the figure) is arranged in the heat shield 210, and the temperature sensing unit is used to detect the temperature in the heat shield 210. The heating unit 220 is in communication connection with the temperature sensing unit, so as to be able to adjust the heating power of the heating unit 220 according to the detection signal of the temperature sensing unit.

[0107] In some examples, the temperature sensing unit is configured as a temperature sensing bag or a temperature sensor capable of detecting the temperature in the heat shield 210. The temperature sensing unit and the heating unit 220 are both in communication connection with the controller in the background.

[0108] It should be understood that, when the temperature sensing unit detects that the temperature in the heat shield 210 is less than a first preset temperature, the heating unit 220 obtains the detection signal of the temperature sensing unit and increases the heating power of the heating unit 220 according to the detection signal, so as to rapidly heat the surface of the pole piece 700 and improve the drying efficiency of the pole piece 700. When the temperature sensing unit detects that the temperature in the heat shield 210 is greater than a second preset temperature, the heating unit 220 obtains the detection signal of the temperature sensing unit and reduces the heating power of the heating unit 220 according to the detection signal, thereby reducing the probability of damage of the heating unit 220 due to overheating and reducing the risk of oxidation of the surface of the pole piece 700 due to overheating.

[0109] It can be understood that, by arranging the temperature sensing unit in the heat shield 210 in cooperation with the heating unit 220, the heating power of the heating unit 220 can be adjusted in real time during the heating and drying process of the pole piece 700 by the heating unit 220, thereby improving the drying efficiency of the pole piece 700 and reducing the risk of oxidation of the surface of the pole piece 700 due to overheating.

[0110] Referring to FIGS. 2, 3, or 4, and 6, in some embodiments of the present application, the conveying mechanism 100 further comprises a base frame 120, and all the heating units 220 are detachably mounted on the base frame 120. The heat shield 210 can rotate relative to the base frame 120 to cover or expose all the heating units 220.

[0111] In some examples, the heating assembly 100 further comprises a mounting rack 260, all the heating units 220 are detachably mounted on the mounting rack 260, and the mounting rack 260 is integrally detachably mounted on the base frame 120, and the heat shield 210 is rotationally connected with the mounting rack 260 through a hinge.

[0112] In this way, the single heating unit 220 can be individually disassembled and replaced, and the heating assembly 100 can be disassembled and assembled as a whole by disassembling and assembling the mounting rack 260, so that the position of the heating assembly 100 relative to the conveying mechanism 100 can be conveniently adjusted to meet the on-site use requirements.

[0113] Referring to FIG. 6, in some embodiments of the present application, the pole piece drying device comprises a locking mechanism 400 for locking or releasing the heat shield 210 from the base frame 120.

[0114] In some examples, the locking mechanism 400 comprises a limiting plate 410 provided on the outer wall of the heat shield 210 and an electronic lock 420 provided on the base frame 120, the limiting plate 410 is provided with a limiting hole, and the electronic lock 420 has a piston rod capable of being extended and retracted, and the piston rod can be limitedly matched with the limiting hole.

[0115] When the locking mechanism 400 is in the locked state, the piston rod of the electronic lock 420 extends into the limiting hole on the limiting plate 410 and is limitedly matched with the limiting hole, so as to lock the heat shield 210 on the base frame 120. At this time, the heat shield 210 cannot be opened relative to the base frame 120 due to the locking effect of the locking mechanism 400, so that the heat shield 210 maintains the state of covering all the heating units 220, reduces the probability of heat loss outside the heat shield 210, and further accelerates the drying rate of the pole piece 700.

[0116] When the locking mechanism 400 is in the unlocked state, the piston rod of the electronic lock 420 is retracted to be separated from the limiting hole on the limiting plate 410, so as to release the locking of the heat shield 210. At this time, the heat shield 210 can be opened relative to the base frame 120, so as to facilitate the user to maintain the heating unit 220 in the heat shield 210.

[0117] In addition, in the above-mentioned locking mechanism 400, the electronic lock 420 can be in communication connection with the temperature sensing unit in the heat shield 210, so as to limit or separate the piston rod from the limiting hole according to the detection signal of the temperature sensing unit, so as to realize the function of locking or releasing the heat shield 210 from the base frame 120, so as to improve the safety performance of the heating assembly 200.

[0118] It should be understood that the application embodiment sets the locking mechanism 400, and locks the heat shield 210 to the base frame 120 through the locking mechanism 400, so that the heat shield 210 maintains the state of covering all the heating units 220, reduces the probability of heat loss outside the heat shield 210, further accelerates the drying rate of the pole piece 700, and can improve the safety performance of the heating assembly 200.

[0119] In some examples, referring to FIGS. 1 and 7, the application embodiment also provides a battery production equipment, which comprises the pole piece drying device of any of the above embodiments.

[0120] The battery production equipment of the application embodiment is configured with the above-mentioned pole piece drying device, and therefore has the same technical effects brought by the pole piece drying device, i.e., through the cooperation of the heating assembly 200 and the conveying mechanism 100, the conveying member 110 carries and conveys the pole piece 700, so that the pole piece 700 and the conveying member 110 remain in a relatively static state and enter the heat shield 210, reducing the probability of the pole piece 700 slipping and deviating from the conveying member 110 in the heat shield 210, so that the pole piece 700 enters the heat shield 210 of the heating assembly 200, so that all the heating units 220 in the heat shield 210 heat the pole piece 700 more uniformly and stably, so that the moisture on the surface of the pole piece 700 can be more efficiently volatilized, improving the drying effect of the pole piece 700, so that the pole piece remains in a relatively dry state for lamination forming, improving the electrical conductivity of the pole piece, and further improving the performance of the battery.

[0121] In some embodiments of the application, referring to FIGS. 1 and 7, the battery production equipment further comprises a leading mechanism 500 and a cutting mechanism 800.

[0122] The leading mechanism 500 is used to pull the pole piece material belt 600 to move along the preset direction X, and the end of the leading mechanism 500 is connected to the conveying mechanism 100. The cutting mechanism 800 is arranged between the leading mechanism 500 and the conveying mechanism 100, and is used to cut the pole piece material belt 600 into a plurality of pole pieces 700.

[0123] In some examples, the battery production equipment further comprises a feeding mechanism 900, which is used to unwind the wound pole piece material belt 600 to the leading mechanism 500. The feeding mechanism 900 can comprise an unwinding roller and a plurality of tensioning rollers on which the pole piece material belt 600 is wound.

[0124] The leading mechanism 500 is connected to the end of the feeding mechanism 900, and the leading mechanism 500 comprises a driving roller 510 and a driven roller 520 arranged oppositely, and a conveying gap for the pole piece material belt 600 to pass through is formed between the driving roller 510 and the driven roller 520. It can be understood that the driving roller 510 can continuously lead out the pole piece material belt 600 unwound by the feeding mechanism 900.

[0125] The cutting mechanism 800 is connected to the end of the leading mechanism 500 to cut the pole piece material belt 600 in time. The cutting mechanism 800 is a conventional device capable of cutting and slitting the battery pole piece.

[0126] It should be noted that the battery production equipment of the embodiments of the present application is provided by cooperating the leading mechanism 500 and the cutting mechanism 800. During the movement of the pole piece material belt 600, the pole piece material belt 600 is cut into multiple pole pieces 700. The pole piece 700 is carried by the conveying member 110 and moved to the position where the heating assembly 200 is located to be heated and dried. Then, the pole piece 700 is kept in a dry state to be laminated and formed. Further, the electrical conductivity of the pole piece 700 is improved, and the use performance of the battery is improved.

[0127] In addition, referring to FIG. 7, in some embodiments of the present application, the battery production equipment further includes a box body 10. The pole piece drying device, the cutting mechanism 800, the leading mechanism 500, and the feeding mechanism 900 are all arranged inside the box body 10. The box body 10 is used to isolate the external environment and reduce the probability of the pole piece 700 or the pole piece material belt 600 adsorbing moisture, dust particles, and other impurities in the environment.

[0128] The upper and lower ends of the box body 10 are respectively provided with an air inlet 11 and an air outlet 12, so that the airflow in the box body 10 and the heat shield 210 can flow smoothly.

[0129] Referring to FIGS. 1 to 7, the embodiments of the present application provide a pole piece drying device and a battery production equipment. The pole piece drying device includes a heating assembly 200 and a conveying mechanism 100. The heating assembly 200 includes a heat shield 210 and a plurality of heating units 220 arranged in the heat shield 210. All the heating units 220 are used to heat the pole piece 700. The conveying mechanism 100 is used to carry and convey the pole piece 700 to drive the pole piece 700 to enter or leave the heat shield 210.

[0130] The battery production equipment includes the pole piece drying device of any of the above embodiments.

[0131] The pole piece drying device and the battery production equipment have the following advantages. The pole piece 700 is carried and transported by the conveying member 110, and the pole piece 700 and the conveying member 110 are kept in a relatively static state when entering the heat shield 210, so that the probability of the pole piece 700 slipping and deviating from the conveying member 110 in the heat shield 210 is reduced. The pole piece 700 enters the heat shield 210 of the heating assembly 200, so that the heating units 220 in the heat shield 210 can uniformly and stably heat the pole piece 700, the moisture on the surface of the pole piece 700 can be more efficiently volatilized, the drying effect of the pole piece 700 is improved, the pole piece can be kept in a relatively dry state for laminating and forming, the electrical conductivity of the pole piece is improved, and the use performance of the battery is improved.

[0132] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the present disclosure.

[0133] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. An electrode drying apparatus, comprising: The heating assembly includes a heat insulation cover and a plurality of heating units spaced apart within the heat insulation cover. All of the heating units are used to heat the electrode plates. The heating assembly also includes an exhaust pipe that connects to a cavity formed by the heat insulation cover to extract water vapor from the cavity. The conveying mechanism includes a conveyor that moves through the heat shield, the conveyor being used to carry and convey the electrode to drive the electrode into or out of the heat shield; The conveying component has a vacuum cavity inside, and an adsorption hole communicating with the vacuum cavity is opened on the surface of the conveying component.

2. The electrode drying apparatus according to claim 1, wherein, The electrode drying device also includes a dust removal mechanism for removing dust from the surface of the conveyor.

3. The electrode drying apparatus according to claim 2, wherein, The dust removal mechanism includes a dust extraction hood and a brush assembly disposed inside the dust extraction hood. The brush assembly is used to brush the surface of the conveyor, and the dust extraction hood is used to receive dust falling from the surface of the conveyor and extract the dust.

4. The electrode drying apparatus according to any one of claims 1 to 3, wherein, The heating assembly also includes an air supply mechanism disposed in the heat insulation cover, the air supply mechanism being used to generate airflow within the heat insulation cover.

5. The electrode drying apparatus according to any one of claims 1 to 4, wherein, The heating unit is configured as an infrared heating tube, which generates infrared rays to heat the electrode.

6. The electrode drying apparatus according to any one of claims 1 to 5, wherein, The heating assembly also includes a reflector plate, which is disposed inside the heat insulation cover and located between the top of the heat insulation cover and all the heating units. The vertical projection of all the heating units relative to the reflector plate is located in the plane where the reflector plate is located.

7. The electrode drying apparatus according to claim 6, wherein, The reflector plate has multiple airflow guide holes for airflow.

8. The electrode drying apparatus according to any one of claims 1 to 7, wherein, The heat insulation cover is equipped with a temperature sensing unit, which is used to detect the temperature inside the heat insulation cover. The heating unit is communicatively connected to the temperature sensing unit so that it can adjust its own heating power according to the detection signal of the temperature sensing unit.

9. The electrode drying apparatus according to any one of claims 1 to 8, wherein, The conveying mechanism also includes a base frame, on which all the heating units are detachably mounted.

10. The electrode drying apparatus according to claim 9, wherein, The heat shield is rotatable relative to the base frame to cover or expose all of the heating units.

11. The electrode drying apparatus according to claim 10, wherein, The electrode drying device includes a locking mechanism for locking or releasing the heat insulation cover to the base frame.

12. A battery manufacturing apparatus, the battery manufacturing apparatus comprising an electrode drying device as described in any one of claims 1 to 11.

13. The battery production equipment according to claim 12, further comprising: A guide belt mechanism is used to pull the electrode strip along a preset direction, and the end of the guide belt mechanism is connected to the conveying mechanism; A cutting mechanism is located between the belt guiding mechanism and the conveying mechanism, and is used to cut the electrode strip into multiple electrode pieces.

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