WO2023015458A1 - 电池极片涂布装置 - Google Patents

电池极片涂布装置 Download PDF

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Publication number
WO2023015458A1
WO2023015458A1 PCT/CN2021/111893 CN2021111893W WO2023015458A1 WO 2023015458 A1 WO2023015458 A1 WO 2023015458A1 CN 2021111893 W CN2021111893 W CN 2021111893W WO 2023015458 A1 WO2023015458 A1 WO 2023015458A1
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WO
WIPO (PCT)
Prior art keywords
tank
main
paint
filling block
die head
Prior art date
Application number
PCT/CN2021/111893
Other languages
English (en)
French (fr)
Inventor
车凯华
刘景泉
胡登凯
Original Assignee
微宏动力系统（湖州）有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 微宏动力系统（湖州）有限公司 filed Critical 微宏动力系统（湖州）有限公司
Priority to PCT/CN2021/111893 priority Critical patent/WO2023015458A1/zh
Publication of WO2023015458A1 publication Critical patent/WO2023015458A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the technical field of battery manufacturing, in particular to a battery pole piece coating device.
  • the battery pole piece is an important component of the lithium-ion battery.
  • the battery pole piece is usually coated with an active material (coating) on the surface of the current collector through a coating device. The consistency of the coating thickness will affect the charge and discharge performance of the battery.
  • Existing coating devices generally include upper and lower dies and gaskets clamped between the upper and lower dies.
  • the width of the overflow coating of the paint can be adjusted, and the width of the coating groove formed by the combination of the upper and lower dies will not change.
  • the change of the opening width of the gasket leads to the change of the flow boundary during the process of the paint flowing outward from the paint tank, and the paint is easy to accumulate at the junction of the paint tank and the gasket, so that the flow state of the paint occurs at this position
  • the coating thickness at the edges of both sides of the battery pole piece is greater than that in the middle, that is, the coating consistency is poor, which affects the quality of the pole piece.
  • the pressure at the paint outlet cannot be linearly related to the feed pressure due to the above situation, so that the coating state cannot be accurately adjusted by adjusting the feed pressure.
  • the purpose of this application is to provide a battery pole piece coating device, by setting a filling block in the paint storage tank, using the filling block to adjust the length of the paint storage tank, so that the length of the paint storage tank is equal to the length of the paint outlet.
  • Matching makes the paint flow more uniform, improves the consistency of the coating thickness, and makes the feed pressure and the coating thickness achieve a stable linear relationship, which is convenient for controlling the coating state.
  • An embodiment of the present application provides a battery pole piece coating device, including an upper die head, a lower die head and a gasket combined with each other, and the pad is clamped between the upper die head and the lower die head
  • the sheet is formed with a slit-shaped paint outlet, and the lower die head is provided with a paint accommodating groove, and the paint accommodating groove is extended along the length direction of the lower die head, and the paint outlet is connected with the paint accommodating groove.
  • the tanks are connected, and a detachable filling block is arranged in the paint holding tank, and the filling block is arranged at the end of the paint holding tank, and the filling block is used to adjust the position of the paint holding tank.
  • the opening distance in the above-mentioned length direction.
  • one side of the spacer is provided with an opening, and the openings of the upper die head, the lower die head and the spacer surround to form the coating outlet.
  • the coating containing groove includes a main groove and a secondary groove, and the main groove and the secondary groove are both extended along the length direction; in the width direction of the lower die head , the secondary tank is located between the main tank and the paint outlet, the secondary tank communicates with the main tank and the paint outlet at the same time, and the depth of the secondary tank is not greater than the depth of the main tank .
  • the auxiliary groove is arranged in parallel with the main groove, and the filling block includes a filling block for the main groove and/or a filling block for the auxiliary groove, and the filling block for the main groove is arranged on the main groove.
  • the main groove filling block is used to adjust the length of the main groove in the length direction
  • the auxiliary groove filling block is arranged in the auxiliary groove and located at the The end of the auxiliary tank, the auxiliary tank filling block is used to adjust the length of the auxiliary tank in the length direction.
  • the number of filling blocks for the main tank is at least two, and the filling blocks for the main tank are respectively arranged at both ends of the main tank; the number of filling blocks for the auxiliary tank is at least two One, the secondary tank filling blocks are respectively arranged at both ends of the secondary tank.
  • the spacer is a U-shaped structure
  • the spacer includes a main body and two extension parts
  • the main body extends along the length direction and is located on one side of the main groove
  • the two extension parts are respectively arranged at both ends of the main body part and are correspondingly located directly above the two main slot filling blocks and the two auxiliary slot filling blocks.
  • the main slot filling block includes a plurality of detachable first stacking blocks, and the main slot filling block is formed by combining and stacking a plurality of the first stacking blocks;
  • the filling block includes a plurality of detachable second stacking blocks, and the secondary slot filling block is formed by combining and stacking a plurality of the second stacking blocks.
  • the bottom of the main groove filling block is provided with a groove along the length direction, and the groove communicates with the main groove.
  • the main groove filling block is also provided with a through hole vertically penetrating up and down, the through hole communicates with the groove, and the upper die head corresponds to the through hole.
  • the position of the hole is provided with a first through hole penetrating up and down along the vertical direction, and the first through hole communicates with the through hole.
  • the paint holding tank is an inverted trapezoidal structure, and the depth of the paint holding tank is along the width direction of the lower die from the side away from the paint outlet to the side close to the paint outlet.
  • the side of the paint outlet is gradually reduced.
  • the battery pole piece coating device provided by the present application is provided with a detachable filling block in the coating storage tank, and the filling block is used to adjust the length of the coating storage tank, so that the length of the coating storage tank (that is, the length in the length direction Opening distance) matches the length of the paint outlet, so that when the paint overflows from the paint storage tank to the paint outlet, there is no structure that affects the flow state of the paint, which slows down the pressure fluctuation when the paint flows, making the paint flow out more uniform ,
  • the output volume at each position of the paint outlet is consistent, which improves the consistency of coating thickness.
  • the battery pole piece coating device provided by the application has good consistency for different coating widths, and meanwhile has a simple structure and low price. Moreover, when adjusting the size of the paint outlet of the battery pole piece coating device (that is, adjusting the width and thickness of the coating), the operator does not need to frequently adjust the equipment based on experience, which is not only easy to operate, but also has no impact on the battery pole piece coating device. damage, which is beneficial to prolong the service life of the equipment.
  • Fig. 1 is a schematic diagram of an exploded structure of a battery electrode sheet coating device in the prior art.
  • FIG. 2 is a schematic perspective view of the three-dimensional structure of the battery electrode sheet coating device in the first embodiment of the present application.
  • FIG. 3 is a schematic cross-sectional view of FIG. 2 .
  • FIG. 4 is a schematic diagram of the exploded structure in FIG. 2 .
  • Fig. 5 is a schematic diagram of the exploded structure after further decomposition of Fig. 4 .
  • FIG. 6 is a top view of FIG. 5 .
  • Fig. 7 is a schematic perspective view of the three-dimensional structure of the main slot filling block in Fig. 6 .
  • FIG. 8 is a schematic perspective view of the three-dimensional structure of the sub-tank filling block in FIG. 6 .
  • FIG. 9 is a schematic cross-sectional view of a battery electrode sheet coating device in the second embodiment of the present application.
  • Fig. 10 is a schematic perspective view of the three-dimensional structure of the main slot filling block in the third embodiment of the present application.
  • FIG. 11 is a schematic perspective view of the three-dimensional structure of the auxiliary tank filling block in the third embodiment of the present application.
  • FIG. 1 shows is existing coating device.
  • Existing coating devices generally include an upper die head 61, a lower die head 62 and a gasket 65, the upper die head 61 and the lower die head 62 are interlocked, and the gasket 65 is sandwiched between the upper die head 61 and the lower die head 62 between.
  • the top surface of the lower die head 62 is provided with a coating container 621
  • the lower die head 62 is provided with a feeding hole 622
  • one side of the coating device is provided with a paint outlet 63 .
  • the paint first flows into the paint holding tank 621 from the feeding hole 622, overflows after the paint holding tank 621 is full, flows out from the paint outlet 63 and is coated on the surface of the battery pole piece (not shown).
  • gasket 65 One side of gasket 65 is provided with opening 651, and paint outlet 63 is corresponding to opening 651, and paint outlet 63 is formed between upper die head 61, lower die head 62 and gasket 65, namely the thickness of gasket 65 has formed upper die.
  • the gap between the die head 61 and the lower die head 62 is the paint outlet 63 (or the paint outlet 63 is formed by the opening 651 of the gasket 65 ).
  • the gasket 65 is used to seal the upper die head 61 and the lower die head 62 (except the position of the paint outlet 63), and the paint outlet 63 can also be adjusted by changing a different gasket 65 or adjusting the size L6 of the opening 651 of the gasket 65 length to adjust the coating width.
  • the above method of adjusting the size L6 of the opening 651 of the gasket 65 does not change the length L5 of the paint storage tank 621.
  • the size L6 of the adjustment opening 651 is reduced, the length L5 of the paint storage tank 621 is greater than the size of the opening 651 L6, and the difference between the two is large.
  • the paint flows from the longer paint holding tank 621 to the opening 651, due to the change of the flow boundary, the paint is easy to flow at the junction of the paint holding tank 621 and the gasket 65 (especially at the edge of the opening 651 of the gasket 65).
  • the pressure at the edge of the opening 651 of the gasket 65 is greater than that at the middle part) to accumulate, so that the flow state of the paint changes at this position, resulting in the coating thickness at the edges of both sides of the battery pole piece being greater than the middle position, that is, the battery pole
  • the coating thickness consistency of the sheet is poor, which affects the quality of the battery pole sheet.
  • the battery pole piece coating device provided in the first embodiment of the present application is used to coat the battery pole piece (not shown in the figure) (coating active materials on the surface of the battery pole piece) .
  • the battery pole piece coating device includes an upper die head 1, a lower die head 2 and a gasket 5 combined with each other, and the gasket 5 is clamped between the upper die head 1 and the lower die head 2 to form a slit-shaped coating outlet 3 ,
  • the paint outlet 3 is located on one side of the battery pole piece coating device.
  • the top surface of the lower die head 2 is provided with a paint holding tank 21 extending along the length direction X of the lower die head 2 , and the paint outlet 3 communicates with the paint holding tank 21 .
  • the paint holding tank 21 is provided with a detachable filling block 4, the filling block 4 is arranged on the end of the paint holding tank 21, and the filling block 4 is used to adjust the opening distance of the paint holding tank 21 in the length direction X, so that The opening distance of the paint holding tank 21 on the length direction X matches the length L4 of the paint outlet 3 (that is, the length of the paint holding tank 21 is equal or similar to the length L4 of the paint outlet 3, and the difference between the two is small or no difference), and at the same time make the position of the paint holding tank 21 correspond to the position of the paint outlet 3.
  • FIG. 5 and FIG. 6 there are two filling blocks 4 , and the two filling blocks 4 are respectively arranged at both ends of the paint storage tank 21 .
  • the lower die head 2 is provided with a feeding hole 22, and the feeding hole 22 is arranged in the lower die head 2 along the vertical direction Z up and down, and the feeding hole 22 is located at The middle part of the paint storage tank 21 is in communication with the paint storage tank 21 .
  • the paint storage tank 21 includes a main tank 211 and a secondary tank 212 , both of which are extended along the longitudinal direction X of the lower die head 2 .
  • the auxiliary groove 212 is located between the main groove 211 and the paint outlet 3 , and the feeding hole 22 communicates with the main groove 211 .
  • the secondary tank 212 communicates with the main tank 211 and the paint outlet 3 at the same time, and the depth of the secondary tank 212 is not greater than the depth of the main tank 211 .
  • the paint first flows into the main tank 211 from the feeding hole 22, overflows into the auxiliary tank 212 after being filled in the main tank 211, overflows to the paint outlet 3 after being filled in the auxiliary tank 212, and then flows from the paint
  • the outlet 3 flows out and is coated on the surface of the battery current collector (not shown).
  • the auxiliary groove 212 is arranged in parallel with the main groove 211 at intervals, and both the auxiliary groove 212 and the main groove 211 are arc-shaped grooves.
  • the filling block 4 comprises a main slot filling block 41 and a secondary slot filling block 42, the main slot filling block 41 is arranged in the main slot 211 and is positioned at the end of the main slot 211, and the main slot filling block 41 is used to adjust the lengthwise direction of the main slot 211. Length L1 on X.
  • the auxiliary groove filling block 42 is arranged in the auxiliary groove 212 and is positioned at the end of the auxiliary groove 212.
  • the auxiliary groove filling block 42 is used to adjust the length L2 of the auxiliary groove 212 in the length direction X, so that the length L1 of the main groove 211 and the auxiliary groove The length L2 of the groove 212 is matched with the length L4 of the paint outlet 3 .
  • both the main slot filling block 41 and the sub slot filling block 42 are solid blocks.
  • the shape of the main groove filling block 41 matches the shape of the main groove 211.
  • the outer wall of the main groove filling block 41 fits with the inner wall of the main groove 211, and the main groove filling block 41 and the original main groove 211 form a new main groove, the length L1 of the new main groove is equal to or similar to the length L4 of the paint outlet 3 .
  • the shape of the auxiliary tank filling block 42 matches the shape of the auxiliary tank 212.
  • the outer wall of the auxiliary tank filling block 42 fits with the inner wall of the auxiliary tank 212, and the auxiliary tank is filled.
  • a new auxiliary groove is formed between the block 42 and the original auxiliary groove 212, and the length L2 of the new auxiliary groove is equal to or close to the length L4 of the paint outlet 3.
  • the paint storage tank 21 is an inverted trapezoidal structure, and the depth of the paint storage tank 21 is along the width direction Y of the lower die head 2 from the side away from the paint outlet 3 toward the One side of the paint outlet 3 gradually decreases.
  • This structure can also prevent sudden changes in the pressure of the paint when it flows out, making the paint more stable and orderly when it flows out.
  • the shape of the filling block 4 needs to be adjusted according to the shape of the paint storage tank 21 .
  • the number of main tank filling blocks 41 is two (in other embodiments, it can be more), and the two main tank filling blocks 41 are respectively arranged on the main tank the two ends of the groove 211.
  • the gasket 5 is a U-shaped structure
  • the gasket 5 includes a main body 52 and two extensions 53, and the extensions 53 protrude from the end of the main body 52 formed, and the two extensions 53 are at a certain angle (eg, perpendicular) to the main body 52 .
  • the main body part 52 extends along the length direction X of the lower die head 2 and is located on one side of the main groove 211.
  • the two extension parts 53 are respectively arranged at both ends of the main body part 52 and correspondingly located in the two main groove filling blocks 41 and the two auxiliary groove filling blocks. Slot filling block 42 above.
  • the top surface of the main groove filling block 41 and the top surface of the auxiliary groove filling block 42 are planar structures, and the top surface of the main groove filling block 41 and the top surface of the auxiliary groove filling block 42 are all flat with the top surface of the lower die head 2. Aligned, the two extensions 53 press the two main slot filling blocks 41 and the two auxiliary slot filling blocks 42 respectively, so that the gasket 5 fits and seals with the main slot filling blocks 41 and the auxiliary slot filling blocks 42 .
  • the main groove filling block 41 is provided with a first pin hole 411
  • the auxiliary groove filling block 42 is provided with a second pin hole 421
  • the gasket 5 is provided with a third pin hole 411.
  • the pin hole 54 and the fourth pin hole 55 are provided with a first pin hole 411
  • the bottom of the main groove filling block 41 is provided with a groove 413 along the length direction X of the lower die head 2 , and the groove 413 communicates with the main groove 211 .
  • the main groove filling block 41 is also provided with a through hole 414 extending vertically Z, and the through hole 414 communicates with the groove 413 .
  • the upper die head 1 is provided with a first through hole 11 penetrating up and down along the vertical direction Z at a position corresponding to the through hole 414 , and the first through hole 11 communicates with the through hole 414 . That is, the main groove 211 passes through the groove 413 and the through hole 414 in turn, and finally communicates with the first through hole 11 .
  • the paint can overflow from the first perforation 11, so that the pressure in the main tank 211
  • the pressure will not be too high (to stabilize the pressure in the main tank 211), so as to reduce the pressure difference between the main tank 211 and the auxiliary tank 212, and ensure the stability of the paint flow.
  • Simultaneously coating device is in start-up process, and when paint just enters in main tank 211, the air in main tank 211 can be discharged by first perforation 11, to reduce the residual amount of air (the air remaining in main tank 211 will The paint forms an extrusion effect or is mixed into the paint, thereby affecting the coating effect).
  • the gasket 5 is provided with a second through hole 56 at a position corresponding to the through hole 414 , and the first through hole 11 communicates with the through hole 414 through the second through hole 56 .
  • the filling block 4 includes a plurality of detachable stacking blocks, and the filling block 4 is formed by combining and stacking a plurality of stacking blocks along the length direction X of the lower die head 2 .
  • the main slot filling block 41 includes a plurality of detachable first stacking blocks 412, and the main slot filling block 41 is formed by combining and stacking a plurality of first stacking blocks 412 along the length direction X of the lower die head 2 (only Two first stacking blocks 412 are shown, and the number of the first stacking blocks 412 can be determined according to actual requirements).
  • the auxiliary groove filling block 42 includes a plurality of detachable second stacking blocks 422, and the auxiliary groove filling block 42 is formed by combining and stacking a plurality of second stacking blocks 422 along the length direction X of the lower die head 2 (only two are shown in the figure). second stacking blocks 422, the number of second stacking blocks 422 can be determined according to actual needs). When the length L1 of the main groove 211 and the length L2 of the auxiliary groove 212 need to be adjusted, it is only necessary to adjust the installed quantities of the first stacking blocks 412 and the second stacking blocks 422 .
  • the battery pole piece coating device provided in the embodiment of the present application, by arranging a detachable filling block 4 in the paint holding tank 21, uses the filling block 4 to adjust the length of the paint holding tank 21, so that the length of the paint holding tank 21 (that is, the opening distance in the length direction X) matches the length L4 of the paint outlet 3, so that in the process of the paint overflowing from the paint storage tank 21 to the paint outlet 3, there is no structure that affects the flow state of the paint, slowing down
  • the pressure fluctuation when the paint flows makes the paint flow out more evenly, and the discharge volume at each position of the paint outlet 3 remains consistent, which improves the consistency of the coating thickness.
  • the battery pole piece coating device provided in the embodiment of the present application has good consistency for different coating widths, and meanwhile has a simple structure and low price. Moreover, when adjusting the size of the paint outlet 3 of the battery pole piece coating device (that is, adjusting the width and thickness of the coating), only the gasket 5 and the filling block 4 need to be replaced, and the operator does not need to frequently adjust the equipment based on experience. , not only easy to operate, but also no damage to the battery pole piece coating device, which is beneficial to prolong the service life of the equipment.

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Abstract

本申请提供一种电池极片涂布装置，包括相互组合的上模头、下模头和垫片，所述上模头与所述下模头之间夹持所述垫片形成有狭缝状的涂料出口，所述下模头设有涂料容置槽，所述涂料容置槽沿所述下模头的长度方向延伸设置，所述涂料出口与所述涂料容置槽相连通，所述涂料容置槽内设有可拆卸的填充块，所述填充块设置于所述涂料容置槽的端部，所述填充块用于调节所述涂料容置槽在所述长度方向上的开口距离。本申请通过在涂料容置槽内设置填充块，利用填充块调节涂料容置槽的长度，使涂料容置槽的长度与涂料出口的长度相匹配，使得涂料流出更均匀，提高了涂布厚度的一致性，并使得进料压力与涂布厚度实现稳定的线性关联，便于控制。

Description

电池极片涂布装置 技术领域
本申请涉及电池制造技术领域，尤其是涉及一种电池极片涂布装置。
 背景技术
随着电子技术的发展，锂离子电池具有的比功率高、循环寿命长、安全性能好以及无污染等优点使其得到广泛地应用。电池极片是锂离子电池重要的组成部件，电池极片通常通过涂布装置在集流体表面涂覆活性材料（涂料），涂布厚度的一致性会影响电池的充放电性能。
 技术问题
现有的涂布装置一般包括上下模头和夹持在上下模头之间的垫片，通过调整垫片开口的大小调节涂料溢出涂布的宽度，而上下模头组合形成的涂料槽的宽度不会改变。此时，垫片开口宽度的改变导致了涂料从涂料槽向外流动溢出过程中的流动边界的改变，涂料容易在涂料槽和垫片的交界处发生堆积，使得涂料的流动状态在此位置发生改变，导致电池极片两侧边缘处的涂布厚度大于中间位置，即其涂布一致性差，影响极片的质量。同时，涂料作为一种弹性流体，其在涂料出口处的压力也会因上述情况而无法与进料压力线性关联，导致无法通过调节进料压力来准确调节涂布状态。
 技术解决方案
本申请的目的是提供一种电池极片涂布装置，通过在涂料容置槽内设置填充块，利用填充块调节涂料容置槽的长度，使涂料容置槽的长度与涂料出口的长度相匹配，使得涂料流出更均匀，提高了涂布厚度的一致性，并使得进料压力与涂布厚度实现稳定的线性关联，便于控制涂布状态。
本申请的一种实施例提供一种电池极片涂布装置，包括相互组合的上模头、下模头和垫片，所述上模头与所述下模头之间夹持所述垫片形成有狭缝状的涂料出口，所述下模头设有涂料容置槽，所述涂料容置槽沿所述下模头的长度方向延伸设置，所述涂料出口与所述涂料容置槽相连通，所述涂料容置槽内设有可拆卸的填充块，所述填充块设置于所述涂料容置槽的端部，所述填充块用于调节所述涂料容置槽在所述长度方向上的开口距离。
在一种可实现的方式中，所述垫片的一侧设有开口，所述上模头、所述下模头和所述垫片的开口围合形成所述涂料出口。
在一种可实现的方式中，所述涂料容置槽包括主槽和副槽，所述主槽和所述副槽均沿所述长度方向延伸设置；在所述下模头的宽度方向上，所述副槽位于所述主槽与所述涂料出口之间，所述副槽同时与所述主槽和所述涂料出口相连通，所述副槽的深度不大于所述主槽的深度。
在一种可实现的方式中，所述副槽与所述主槽平行间隔设置，所述填充块包括主槽填充块和/或副槽填充块，所述主槽填充块设置于所述主槽内并位于所述主槽的端部，所述主槽填充块用于调节所述主槽在所述长度方向上的长度，所述副槽填充块设置于所述副槽内并位于所述副槽的端部，所述副槽填充块用于调节所述副槽在所述长度方向上的长度。
在一种可实现的方式中，所述主槽填充块的数量为至少两个，所述主槽填充块分别设置于所述主槽的两端；所述副槽填充块的数量为至少两个，所述副槽填充块分别设置于所述副槽的两端。
在一种可实现的方式中，所述垫片为U形结构，所述垫片包括主体部和两个延伸部，所述主体部沿所述长度方向延伸并位于所述主槽的一侧，两个所述延伸部分别设置在所述主体部的两端并对应位于两个所述主槽填充块和两个所述副槽填充块的正上方。
在一种可实现的方式中，所述主槽填充块包括多个可拆卸的第一堆叠块，所述主槽填充块由多个所述第一堆叠块组合堆叠而成；所述副槽填充块包括多个可拆卸的第二堆叠块，所述副槽填充块由多个所述第二堆叠块组合堆叠而成。
在一种可实现的方式中，所述主槽填充块的底部沿所述长度方向设有凹槽，所述凹槽与所述主槽相连通。
在一种可实现的方式中，所述主槽填充块还设有沿竖直方向上下贯穿的通孔，所述通孔与所述凹槽相连通，所述上模头于对应所述通孔的位置设有沿所述竖直方向上下贯穿的第一穿孔，所述第一穿孔与所述通孔相连通。
在一种可实现的方式中，所述涂料容置槽为倒梯形结构，所述涂料容置槽的深度沿所述下模头的宽度方向上由远离所述涂料出口的一侧朝向靠近所述涂料出口的一侧逐渐减小。
 有益效果
本申请提供的电池极片涂布装置，通过在涂料容置槽内设置可拆卸的填充块，利用填充块调节涂料容置槽的长度，使涂料容置槽的长度（即在长度方向上的开口距离）与涂料出口的长度相匹配，从而使得涂料从涂料容置槽溢出到涂料出口的过程中，不存在影响涂料流动状态的结构，减缓了涂料流动时的压力波动，使得涂料流出更均匀，涂料出口各位置处的出料量保持一致，提高了涂布厚度的一致性。
本申请提供的电池极片涂布装置对于不同的涂布宽度均具有良好的一致性，同时结构简单、价格低廉。而且在调整该电池极片涂布装置的涂料出口的大小（即调整涂布的宽度和厚度）时，操作者无需根据经验频繁地调整设备，不仅操作方便，而且对电池极片涂布装置无破坏，有利于延长设备的使用寿命。
 附图说明
图1为现有技术中电池极片涂布装置的爆炸结构示意图。
图2为本申请第一实施例中电池极片涂布装置的立体结构示意图。
图3为图2的截面示意图。
图4为图2的爆炸结构示意图。
图5为图4进一步分解后的爆炸结构示意图。
图6为图5的俯视图。
图7为图6中主槽填充块的立体结构示意图。
图8为图6中副槽填充块的立体结构示意图。
图9为本申请第二实施例中电池极片涂布装置的截面示意图。
图10为本申请第三实施例中主槽填充块的立体结构示意图。
图11为本申请第三实施例中副槽填充块的立体结构示意图。
 本发明的实施方式
下面结合附图和实施例，对本申请的具体实施方式作进一步详细描述。以下实施例用于说明本申请，但不用来限制本申请的范围。
本申请的说明书和权利要求书中的术语“第一”、“第二”、“第三”、“第四”等（如果存在）是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。
本申请的说明书和权利要求书中所涉及的上、下、左、右、前、后、顶、底等（如果存在）方位词是以附图中的结构位于图中的位置以及结构相互之间的位置来定义的，只是为了表达技术方案的清楚及方便。应当理解，方位词的使用不应限制本申请请求保护的范围。
图1所示的是现有的涂布装置。现有的涂布装置一般包括上模头61、下模头62和垫片65，上模头61和下模头62相互扣合，垫片65夹设于上模头61和下模头62之间。下模头62的顶面设有涂料容置槽621，下模头62内设有入料孔622，涂布装置的一侧设有涂料出口63。涂料先由入料孔622流入涂料容置槽621内，在涂料容置槽621内蓄满后溢出，再从涂料出口63处流出并涂布在电池极片（图未示）的表面。
垫片65的一侧设有开口651，涂料出口63与开口651相对应，涂料出口63形成于上模头61、下模头62和垫片65之间，即垫片65的厚度形成了上模头61和下模头62之间的间隙，该间隙即为涂料出口63（或者是说涂料出口63由垫片65的开口651形成）。垫片65除了用于密封上模头61和下模头62外（除涂料出口63位置外），还能够通过更换不同的垫片65或者调整垫片65的开口651大小L6以调整涂料出口63的长度，从而调整涂布的宽度。
上述这种通过调整垫片65的开口651大小L6的方式并未改变涂料容置槽621的长度L5，当调整开口651的大小L6减小时，涂料容置槽621的长度L5大于开口651的大小L6，且两者的差值较大。涂料在从长度更长的涂料容置槽621流向开口651处时，由于流动边界的改变，涂料容易在涂料容置槽621与垫片65的交界处（尤其是在垫片65的开口651边缘处，垫片65的开口651边缘处的压力大于中间部分）发生堆积，使得涂料的流动状态在此位置发生改变，导致电池极片的两侧边缘处的涂布厚度大于中间位置，即电池极片的涂布厚度一致性较差，影响电池极片的质量。
如图2至图6所示，本申请第一实施例提供的电池极片涂布装置，用于对电池极片（图未示）进行涂布（在电池极片的表面涂覆活性材料）。该电池极片涂布装置包括相互组合的上模头1、下模头2和垫片5，上模头1与下模头2之间夹持垫片5形成有狭缝状的涂料出口3，涂料出口3位于电池极片涂布装置的一侧。下模头2的顶面设有涂料容置槽21，涂料容置槽21沿下模头2的长度方向X延伸设置，涂料出口3与涂料容置槽21相连通。涂料容置槽21内设有可拆卸的填充块4，填充块4设置于涂料容置槽21的端部，填充块4用于调节涂料容置槽21在长度方向X上的开口距离，使涂料容置槽21在长度方向X上的开口距离与涂料出口3的长度L4相匹配（即涂料容置槽21的长度与涂料出口3的长度L4大小相等或相近，两者的差值较小或无差值），同时使涂料容置槽21的位置与涂料出口3的位置相对应。
如图5及图6所示，作为一种实施方式，填充块4的数量为两个，两个填充块4分别设置于涂料容置槽21的两端。
如图4至图6所示，作为一种实施方式，下模头2设有入料孔22，入料孔22沿竖直方向Z上下贯穿设置于下模头2内，入料孔22位于涂料容置槽21的中部位置且与涂料容置槽21相连通。
如图3至图6所示，作为一种实施方式，涂料容置槽21包括主槽211和副槽212，主槽211和副槽212均沿下模头2的长度方向X延伸设置。在下模头2的宽度方向Y上，副槽212位于主槽211与涂料出口3之间，入料孔22与主槽211相连通。副槽212同时与主槽211和涂料出口3相连通，副槽212的深度不大于主槽211的深度。
具体地，涂料先由入料孔22流入主槽211内，在主槽211内蓄满后溢出至副槽212内，然后在副槽212内蓄满后溢出至涂料出口3处，再从涂料出口3流出并涂布在电池集流体（图未示）的表面。通过将副槽212的深度设置成小于或等于主槽211的深度，使得涂料在流出时的压力能够逐渐增大（防止涂料在流出时的压力发生突变），从而使得涂料在流出时更加稳定有序。
如图3至图6所示，作为一种实施方式，副槽212与主槽211平行间隔设置，副槽212与主槽211均为圆弧形结构的凹槽。填充块4包括主槽填充块41和副槽填充块42，主槽填充块41设置于主槽211内并位于主槽211的端部，主槽填充块41用于调节主槽211在长度方向X上的长度L1。副槽填充块42设置于副槽212内并位于副槽212的端部，副槽填充块42用于调节副槽212在长度方向X上的长度L2，从而使主槽211的长度L1和副槽212的长度L2均与涂料出口3的长度L4相匹配。
具体地，主槽填充块41和副槽填充块42均为实心块。主槽填充块41的形状与主槽211的形状相契合，当主槽填充块41安装到主槽211内后，主槽填充块41的外壁与主槽211的内壁相贴合，主槽填充块41与原来的主槽211之间围合成新的主槽，该新的主槽的长度L1与涂料出口3的长度L4大小相等或相近。副槽填充块42的形状与副槽212的形状相契合，当副槽填充块42安装到副槽212内后，副槽填充块42的外壁与副槽212的内壁相贴合，副槽填充块42与原来的副槽212之间围合成新的副槽，该新的副槽的长度L2与涂料出口3的长度L4大小相等或相近。涂料在依次注满主槽211和副槽212并向外流出的过程中，不存在影响涂料流动状态的结构，减缓了涂料流动时的压力波动，使得涂料流出更均匀，涂料出口3各位置处的出料量保持一致，提高了涂布厚度的一致性。
如图9所示，作为另一种实施方式，涂料容置槽21为倒梯形结构，涂料容置槽21的深度沿下模头2的宽度方向Y上由远离涂料出口3的一侧朝向靠近涂料出口3的一侧逐渐减小。该结构同样能够防止涂料在流出时的压力发生突变，使得涂料在流出时更加稳定有序。当然，在该实施例中，填充块4的形状需要根据涂料容置槽21的形状进行调整。
如图5及图6所示，作为一种实施方式，主槽填充块41的数量为两个（在其他实施方式中，可以为更多个），两个主槽填充块41分别设置于主槽211的两端。副槽填充块42的数量为两个（在其他实施方式中，可以为更多个），两个副槽填充块42分别设置于副槽212的两端。
如图2至图6所示，作为一种实施方式，上模头1的底面和下模头2的顶面均为平面形结构，垫片5的顶面与上模头1的底面相贴合，垫片5的底面与下模头2的顶面相贴合。垫片5的一侧设有开口51，涂料出口3与开口51相对应，上模头1、下模头2和垫片5的开口51围合形成涂料出口3，涂料出口3的的长度L4与开口51的长度L3相等，主槽211的长度L1和副槽212的长度L2均与开口51的长度L3相匹配。
如图4至图6所示，作为一种实施方式，垫片5为U形结构，垫片5包括主体部52和两个延伸部53，延伸部53由主体部52的端部延伸凸出形成，且两个延伸部53均与主体部52成一定角度（如垂直）。主体部52沿下模头2的长度方向X延伸并位于主槽211的一侧，两个延伸部53分别设置在主体部52的两端并对应位于两个主槽填充块41和两个副槽填充块42的上方。主槽填充块41的顶面和副槽填充块42的顶面均为平面形结构，主槽填充块41的顶面和副槽填充块42的顶面均与下模头2的顶面平齐，两个延伸部53分别将两个主槽填充块41和两个副槽填充块42压紧，使垫片5与主槽填充块41和副槽填充块42之间贴合密封。
如图6及图8所示，作为一种实施方式，主槽填充块41设有第一销轴孔411，副槽填充块42设有第二销轴孔421，垫片5设有第三销轴孔54和第四销轴孔55。第三销轴孔54与第一销轴孔411相对应，第四销轴孔55与第二销轴孔421相对应，第三销轴孔54和第一销轴孔411内以及第四销轴孔55和第二销轴孔421内均设有销轴（图未示），从而使主槽填充块41和副槽填充块42均与垫片5相固定，以防止主槽填充块41和副槽填充块42分别在主槽211和副槽212内滑动。
具体地，垫片5除了起到密封上模头1和下模头2的作用外，还用于形成涂料出口3，同时还起到定位主槽填充块41和副槽填充块42的作用。
如图6及图7所示，作为一种实施方式，主槽填充块41的底部沿下模头2的长度方向X设有凹槽413，凹槽413与主槽211相连通。主槽填充块41还设有沿竖直方向Z上下贯穿的通孔414，通孔414与凹槽413相连通。上模头1于对应通孔414的位置设有沿竖直方向Z上下贯穿的第一穿孔11，第一穿孔11与通孔414相连通。即主槽211依次通过凹槽413和通孔414，最终与第一穿孔11连通。
具体地，当主槽211内的压力升高时（入料孔22处的进料流量远大于涂料出口3处的涂布流量），涂料能够从第一穿孔11溢出，从而使得主槽211内的压力不会过高（稳定主槽211内的压力），以减小主槽211和副槽212之间的压差，保证涂料流动的稳定性。同时涂布装置在启动过程中，涂料在刚进入主槽211内时，主槽211内的空气能够通过第一穿孔11排出，以减少空气的残留量（残留在主槽211内的空气会对涂料形成挤压作用或混入涂料内，从而影响涂布效果）。
如图5及图6所示，作为一种实施方式，垫片5于对应通孔414的位置设有第二穿孔56，第一穿孔11通过第二穿孔56与通孔414相连通。
作为一种实施方式，当需要调整涂布的宽度和厚度时，可以通过更换不同开口51大小或不同厚度的垫片5来实现。当需要调节主槽211的长度L1和副槽212的长度L2时，可以通过更换不同宽度的主槽填充块41和副槽填充块42来实现。
如图10及图11所示，作为另一种实施方式，填充块4包括多个可拆卸的堆叠块，填充块4由多个堆叠块沿下模头2的长度方向X组合堆叠而成。具体地，主槽填充块41包括多个可拆卸的第一堆叠块412，主槽填充块41由多个第一堆叠块412沿下模头2的长度方向X组合堆叠而成（图中仅示出两个第一堆叠块412，第一堆叠块412的数量可视实际需求而定）。副槽填充块42包括多个可拆卸的第二堆叠块422，副槽填充块42由多个第二堆叠块422沿下模头2的长度方向X组合堆叠而成（图中仅示出两个第二堆叠块422，第二堆叠块422的数量可视实际需求而定）。当需要调节主槽211的长度L1和副槽212的长度L2时，只需要调整第一堆叠块412和第二堆叠块422的安装数量即可。
本申请实施例提供的电池极片涂布装置，通过在涂料容置槽21内设置可拆卸的填充块4，利用填充块4调节涂料容置槽21的长度，使涂料容置槽21的长度（即在长度方向X上的开口距离）与涂料出口3的长度L4相匹配，从而使得涂料从涂料容置槽21溢出到涂料出口3的过程中，不存在影响涂料流动状态的结构，减缓了涂料流动时的压力波动，使得涂料流出更均匀，涂料出口3各位置处的出料量保持一致，提高了涂布厚度的一致性。
本申请实施例提供的电池极片涂布装置对于不同的涂布宽度均具有良好的一致性，同时结构简单、价格低廉。而且在调整该电池极片涂布装置的涂料出口3的大小（即调整涂布的宽度和厚度）时，只需要更换垫片5和填充块4即可，操作者无需根据经验频繁地调整设备，不仅操作方便，而且对电池极片涂布装置无破坏，有利于延长设备的使用寿命。
以上，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以权利要求的保护范围为准。

Claims (10)

  1. 一种电池极片涂布装置，包括相互组合的上模头（1）、下模头（2）和垫片（5），所述上模头（1）与所述下模头（2）之间夹持所述垫片（5）形成有狭缝状的涂料出口（3），其特征在于，所述下模头（2）设有涂料容置槽（21），所述涂料容置槽（21）沿所述下模头（2）的长度方向（X）延伸设置，所述涂料出口（3）与所述涂料容置槽（21）相连通，所述涂料容置槽（21）内设有可拆卸的填充块（4），所述填充块（4）设置于所述涂料容置槽（21）的端部，所述填充块（4）用于调节所述涂料容置槽（21）在所述长度方向（X）上的开口距离。
  2. 如权利要求1所述的电池极片涂布装置，其特征在于，所述垫片（5）的一侧设有开口（51），所述上模头（1）、所述下模头（2）和所述垫片（5）的开口（51）围合形成所述涂料出口（3）。
  3. 如权利要求1所述的电池极片涂布装置，其特征在于，所述涂料容置槽（21）包括主槽（211）和副槽（212），所述主槽（211）和所述副槽（212）均沿所述长度方向（X）延伸设置；在所述下模头（2）的宽度方向（Y）上，所述副槽（212）位于所述主槽（211）与所述涂料出口（3）之间，所述副槽（212）同时与所述主槽（211）和所述涂料出口（3）相连通，所述副槽（212）的深度不大于所述主槽（211）的深度。
  4. 如权利要求3所述的电池极片涂布装置，其特征在于，所述副槽（212）与所述主槽（211）平行间隔设置，所述填充块（4）包括主槽填充块（41）和/或副槽填充块（42），所述主槽填充块（41）设置于所述主槽（211）内并位于所述主槽（211）的端部，所述主槽填充块（41）用于调节所述主槽（211）在所述长度方向（X）上的长度（L1），所述副槽填充块（42）设置于所述副槽（212）内并位于所述副槽（212）的端部，所述副槽填充块（42）用于调节所述副槽（212）在所述长度方向（X）上的长度（L2）。
  5. 如权利要求4所述的电池极片涂布装置，其特征在于，所述主槽填充块（41）的数量为至少两个，所述主槽填充块（41）分别设置于所述主槽（211）的两端；所述副槽填充块（42）的数量为至少两个，所述副槽填充块（42）分别设置于所述副槽（212）的两端。
  6. 如权利要求5所述的电池极片涂布装置，其特征在于，所述垫片（5）为U形结构，所述垫片（5）包括主体部（52）和两个延伸部（53），所述主体部（52）沿所述长度方向（X）延伸并位于所述主槽（211）的一侧，两个所述延伸部（53）分别设置在所述主体部（52）的两端并对应位于两个所述主槽填充块（41）和两个所述副槽填充块（42）的正上方。
  7. 如权利要求4所述的电池极片涂布装置，其特征在于，所述主槽填充块（41）包括多个可拆卸的第一堆叠块（412），所述主槽填充块（41）由多个所述第一堆叠块（412）组合堆叠而成；所述副槽填充块（42）包括多个可拆卸的第二堆叠块（422），所述副槽填充块（42）由多个所述第二堆叠块（422）组合堆叠而成。
  8. 如权利要求4所述的电池极片涂布装置，其特征在于，所述主槽填充块（41）的底部沿所述长度方向（X）设有凹槽（413），所述凹槽（413）与所述主槽（211）相连通。
  9. 如权利要求8所述的电池极片涂布装置，其特征在于，所述主槽填充块（41）还设有沿竖直方向（Z）上下贯穿的通孔（414），所述通孔（414）与所述凹槽（413）相连通，所述上模头（1）于对应所述通孔（414）的位置设有沿所述竖直方向（Z）上下贯穿的第一穿孔（11），所述第一穿孔（11）与所述通孔（414）相连通。
  10. 如权利要求1所述的电池极片涂布装置，其特征在于，所述涂料容置槽（21）为倒梯形结构，所述涂料容置槽（21）的深度沿所述下模头（2）的宽度方向（Y）上由远离所述涂料出口（3）的一侧朝向靠近所述涂料出口（3）的一侧逐渐减小。
PCT/CN2021/111893 2021-08-10 2021-08-10 电池极片涂布装置 WO2023015458A1 (zh)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06198240A (ja) * 1992-10-27 1994-07-19 Mitsubishi Kasei Corp ダイコータ
US5674556A (en) * 1993-06-15 1997-10-07 Fuji Photo Film Co., Ltd. Method for producing a sheet-like plate
JP2002136910A (ja) * 2000-11-07 2002-05-14 Nitto Denko Corp ダイコータおよびそれを用いた塗工方法
CN110302942A (zh) * 2019-07-17 2019-10-08 宁波维科电池有限公司 用于单组或多组锂电池极片的涂布模头
JP2020138148A (ja) * 2019-02-28 2020-09-03 株式会社豊田自動織機 塗工装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06198240A (ja) * 1992-10-27 1994-07-19 Mitsubishi Kasei Corp ダイコータ
US5674556A (en) * 1993-06-15 1997-10-07 Fuji Photo Film Co., Ltd. Method for producing a sheet-like plate
JP2002136910A (ja) * 2000-11-07 2002-05-14 Nitto Denko Corp ダイコータおよびそれを用いた塗工方法
JP2020138148A (ja) * 2019-02-28 2020-09-03 株式会社豊田自動織機 塗工装置
CN110302942A (zh) * 2019-07-17 2019-10-08 宁波维科电池有限公司 用于单组或多组锂电池极片的涂布模头

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