CN220283048U - Winding device of pole piece - Google Patents
Winding device of pole piece Download PDFInfo
- Publication number
- CN220283048U CN220283048U CN202321705856.XU CN202321705856U CN220283048U CN 220283048 U CN220283048 U CN 220283048U CN 202321705856 U CN202321705856 U CN 202321705856U CN 220283048 U CN220283048 U CN 220283048U
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- China
- Prior art keywords
- winding
- pole piece
- heating
- heat
- heat conducting
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- 238000004804 winding Methods 0.000 title claims abstract description 105
- 238000010438 heat treatment Methods 0.000 claims abstract description 100
- 238000006243 chemical reaction Methods 0.000 claims description 14
- 238000005485 electric heating Methods 0.000 claims description 10
- 230000017525 heat dissipation Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- 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
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- General Induction Heating (AREA)
Abstract
The utility model belongs to the technical field of secondary batteries, and discloses a winding device of a pole piece, which comprises a winding heating structure and a heat conducting structure, wherein the winding heating structure is used for generating heat; the heat conducting structure is arranged at the outer side of the winding heating structure and is used for winding the pole piece and transmitting heat generated by the winding heating structure, so that the pole piece can be wound, heat can be generated, the generated heat is conducted to the pole piece wound on the heat conducting structure through the heat conducting structure, and the pole piece wound on the heat conducting structure is heated from inside to outside; the winding device for winding the pole piece is arranged in an external heat source to heat the pole piece, and the external heat source is used for winding the pole piece in the heat conduction structure to be heated from outside to inside. The pole pieces wound on the heat conducting structure are heated on two sides, the inner layer and the outer layer can reach the set temperature in a short time, the rebound of the inner field pole piece and the outer field pole piece is basically consistent, the thickness of the coiled material is uniform, and the phenomenon that the temperature of the inner side coiled material is low and the rebound is insufficient is avoided.
Description
Technical Field
The utility model relates to the technical field of secondary batteries, in particular to a winding device of a pole piece.
Background
The preparation process of the lithium ion battery pole piece generally comprises the working procedures of batching, coating, rolling, baking, slitting, punching and the like, and although the manufacturing working procedures of different batteries can be changed, the pole piece baking is an indispensable working procedure. Traditional baking mode is to pull the pole piece that will receive and toast in the oven, but in order to improve production efficiency, the coil stock of rolling can be bigger and bigger (coil stock diameter can be bigger and bigger promptly), so, the coil stock that is close to the reel inboard can receive the pressure from outside coil stock, and the larger the coil stock diameter, the pressure of inboard coil stock is bigger, at the in-process of toasting, can appear: (1) the inner side coil stock is restrained from rebounding due to the outer side pressure, the rebound of the coil stock is small, the rebound of the outer side coil stock is large, the thickness of the punched pole piece is uneven, and the consistency and stability of the thickness of the battery cell are poor; (2) meanwhile, the internal coil stock can extend in the width direction while resisting external pressure, the pole pieces in the lamination are poorly coated, and potential safety hazards are caused in the later period of circulation. (3) In a certain baking time, the uneven temperature of the inner and outer coil materials causes great rebound difference of the pole pieces, and the sealing into the aluminum plastic film shell is difficult. The preparation method of the lithium ion battery pole piece disclosed in the application number CN115360329A has the advantages that the temperature of the inner side coil stock is low, and the rebound is insufficient.
Disclosure of Invention
The utility model mainly aims to provide a winding device for pole pieces, and aims to solve the technical problems of uneven heating of coil stock, low temperature of inner coil stock and insufficient rebound in the prior art.
In order to achieve the above object, a first aspect of the present utility model provides a winding device for a pole piece.
A winding device for a pole piece, for heating the pole piece, comprising:
the winding heating structure is used for generating heat;
the heat conduction structure is arranged at the outer side of the winding heating structure and is used for winding the pole piece and transmitting heat generated by the winding heating structure;
and placing a winding device for winding the pole piece with the pole piece in an external heat source to heat the pole piece.
Further, the winding heating structure comprises a winding drum and a heating piece, wherein the heating piece is arranged on the winding drum.
Further, a track is arranged on the winding drum, the track is arranged along the length direction of the winding drum, the heating element is laid on the track, and the heating element can slide on the track.
Further, the winding heating structure further comprises an electric energy conversion device, and the electric energy conversion device is arranged on the winding heating structure; the electric energy conversion device is used for converting mechanical energy into electric energy.
Further, the winding drum is provided with a plurality of rails, and the rails are arranged along the circumferential direction of the winding drum at equal angles; at least two heating elements are paved on each track.
Further, the heat conduction structure is sleeved on the outer side of the winding heating structure.
Further, the heat conducting structure is a hollow cylinder with two ends open.
Further, the heat conducting structure is provided with a plurality of heat dissipation holes, and a plurality of heat dissipation holes are uniformly formed in the heat conducting structure.
Further, the heating element is detachably arranged on the track.
Further, a heating part is arranged in the heating part, and the heating part comprises at least one of an electric heating resistance wire, an electric heating tube and a heating furnace.
The beneficial effects are that:
the winding device for the pole piece is characterized in that the winding heating structure not only can wind the pole piece, but also can generate heat, and the generated heat is transmitted to the pole piece wound on the heat conducting structure through the heat conducting structure, so that the pole piece wound on the heat conducting structure is heated from inside to outside; the winding device for winding the pole piece is arranged in an external heat source to heat the pole piece, and the external heat source is used for winding the pole piece in the heat conduction structure to be heated from outside to inside. The pole pieces wound on the heat conducting structure are heated on two sides, the inner layer and the outer layer can reach the set temperature in a short time, the rebound of the inner field pole piece and the outer field pole piece is basically consistent, the thickness of the coiled material is uniform, and the phenomenon that the temperature of the coiled material on the inner side is low and the rebound is insufficient is avoided.
Drawings
FIG. 1 is a schematic diagram of a winding device for pole pieces according to an embodiment of the present utility model;
FIG. 2 is a front view of a winding device for pole pieces according to an embodiment of the present utility model;
FIG. 3 is a left side view of a winding device for pole pieces according to an embodiment of the present utility model;
fig. 4 is a cross-sectional view of a winding device for pole pieces according to an embodiment of the present utility model.
Wherein:
1-a heat conducting structure; 2-winding drum; 3-heat dissipation holes; 4-track; 5-heating element.
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless specifically defined otherwise.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; the connection may be mechanical connection, direct connection or indirect connection through an intermediate medium, and may be internal connection of two elements or interaction relationship of two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
Referring to fig. 1, in an embodiment, the utility model discloses a winding device of a pole piece, which is used for heating the pole piece and comprises:
the winding heating structure is used for generating heat;
the heat conduction structure 1 is arranged at the outer side of the winding heating structure and is used for conducting heat generated by the winding heating structure to the pole piece wound on the heat conduction structure 1; wherein, the winding device wound with the pole piece is placed in an external heat source to heat the pole piece.
In the above embodiment, the winding heating structure not only can wind the pole piece, but also can generate heat, and the generated heat is conducted to the pole piece wound on the heat conducting structure 1 through the heat conducting structure 1 to heat, and the pole piece wound on the heat conducting structure 1 is heated from inside to outside; the winding device for winding the pole piece is placed in an external heat source to heat the pole piece, and the external heat source is used for heating the pole piece wound on the heat conducting structure 1 from outside to inside. The pole pieces wound on the heat conducting structure 1 are heated on two sides, the inner layer and the outer layer can reach the set temperature in a short time, the rebound of the inner field pole piece and the outer field pole piece is basically consistent, the thickness of the coil stock is uniform, and the condition that the temperature of the inner side coil stock is low and the rebound is insufficient is avoided.
The pole piece on the heat conduction structure 1 is heated on two sides, so that the baking time is shortened, and the energy consumption is reduced.
The external heat source is an oven or a baking furnace, the pole piece is wound on the heat conducting structure 1, the winding device wound with the pole piece is placed in the oven or the baking furnace, the winding heating structure and the oven heat the pole piece, and the inner side and the outer side of the pole piece on the heat conducting structure 1 are heated.
In an embodiment, the winding heating structure and the heat conducting structure 1 may be connected by a buckle (or other connection modes), the winding heating structure drives the heat conducting structure to rotate (when the winding heating structure and the heat conducting structure 1 are connected by the buckle, the winding heating structure and the heat conducting structure 1 synchronously rotate, and when the winding heating structure and the heat conducting structure 1 are connected by a bearing, the winding heating structure and the heat conducting structure 1 relatively rotate), so as to roll the pole piece on the heat conducting structure 1.
Preferably, the length of the heat conducting structure 1 is larger than the width of the pole piece, so that the pole piece is ensured to be fully rolled on the heat conducting structure 1, and further the pole piece is ensured to be heated uniformly.
Referring to fig. 3, in one embodiment, the winding heating structure includes a winding drum 2 and a heating member 5, and the heating member 5 is disposed on the winding drum 2.
In the above embodiment, the winding drum 2 is used for winding the pole piece, and the pole piece is wound on the heat conducting structure 1, so that the pole piece is stable; the heating element 5 is used for heating the pole piece, the heating element 5 is arranged on the winding drum 2, and the pole piece on the heat conduction structure 1 is heated from inside to outside.
Referring to fig. 3 and 4, in an embodiment, a rail 4 is provided on the spool 2, the rail 4 is provided along a length direction of the spool 2, the heating member 5 is laid on the rail 4, and the heating member 5 is movable on the rail 4.
In the embodiment, a plurality of sections of heating elements 5 are paved on the track 4 to uniformly heat the pole pieces in width; the pole piece is wound on the heat conducting structure 1, the heating piece 5 heats the pole piece, the widths of different pole pieces are different, the track 4 is used for sliding the heating body along the axial and radial directions, and the pole piece winding device is suitable for pole pieces with different widths. The heating range can be controlled by controlling the number of the heating bodies on the track 4 and the mounting positions of the heating bodies, and the heating range is suitable for coil stocks with different widths.
Referring to fig. 1, in an embodiment, the winding heating structure further includes an electric energy conversion device, where the electric energy conversion device is disposed on the winding heating structure; the electric energy conversion device is used for converting electric energy into electric energy.
In the above embodiment, the winding drum 2 drives the heat conducting structure 1 to rotate to roll the pole piece on the heat conducting structure 1, mechanical energy such as friction and rotation is converted into electric energy through the electric energy conversion device in the winding process of the winding drum 2 to be stored, so that the inner-layer heating body is convenient to heat during the next winding and baking, an additional power supply is not needed, and the power consumption is reduced.
The electric energy conversion device converts mechanical energy into electric energy by utilizing the principle of electromagnetic induction, the electric energy conversion device comprises a coil, a charging circuit and a battery, when the pole piece is wound, the winding device of the pole piece is arranged in a set magnetic field, the winding heating structure rotates to enable the coil to continuously cut the magnetic induction line of the magnetic field to generate electric energy, and the generated electric energy is stored in the battery to provide electric energy for the heating piece 5.
If the winding drum 2 is a hollow cylinder, the electric energy conversion device is arranged in the winding drum 2.
Referring to fig. 1, in an embodiment, the spool 2 is provided with a plurality of the rails 4, and the plurality of the rails 4 are disposed at equal angles along the circumference of the spool 2; at least two heating elements 5 are laid on each track 4.
In the above embodiment, the pole piece is rolled on the heat conducting structure 1, and the plurality of tracks 4 are arranged along the circumferential equal angle of the winding drum 2, so that the heating of the pole piece is more uniform, the heating speed is higher, and the time is saved.
Referring to fig. 1 to 4, in an embodiment, the heat conducting structure 1 is sleeved on the outer side of the winding heating structure.
In the above embodiment, the heat conducting structure 1 is sleeved on the outer side of the winding heating structure, no fixing part is provided, the heating part 5 is conveniently increased or decreased at any time, the heating part 5 is conveniently replaced, the winding drum 2 can be inflated in a manner similar to an inflatable shaft when needed, the guide rail is inflated to expand upwards, the heating part 5 is driven to prop against the inner wall of the heat conducting structure 1, accordingly, the winding drum 2 and the heat conducting structure 1 are fixed, and the winding drum 2 and the heat conducting structure 1 rotate synchronously when rotating.
Referring to fig. 1, in an embodiment, the heat conducting structure 1 is a hollow cylinder with two ends open.
In the above embodiment, the heat conducting structure 1 is a hollow cylinder with two open ends, so that the heat conducting structure 1 is conveniently sleeved on the outer side of the winding heating structure; the end surfaces at the two ends of the heat conducting structure 1 are not sealed, heat generated by the heating body can be transferred from the end surfaces at the two ends, so that the temperature of the incubator or the baking room can be quickly balanced, the baking time is reduced, and the energy consumption is reduced.
Referring to fig. 1 and 2, in an embodiment, the heat conducting structure 1 is provided with a heat radiator.
In the above embodiment, the heat sink is used for gas exchange, so that the heat transfer efficiency and the gas exchange efficiency can be improved. The heat that the heating member produced can follow the terminal surface outgoing at heat conduction structure 1 both ends, also can follow the air current hole on the heat conduction structure 1 and heat inlayer coil stock, can also make the temperature of thermostated container or bakery reach the equilibrium fast, reduces the baking time, reduces the energy consumption.
Referring to fig. 4, in an embodiment, the heat dissipating body includes a plurality of heat dissipating holes 3, and the plurality of heat dissipating holes 3 are uniformly disposed on the heat conducting structure 1.
In the above embodiment, the plurality of heat dissipation holes 3 are uniformly arranged on the heat conduction structure 1, so that the temperature of the incubator or the baking room can be quickly balanced, the baking time is reduced, the energy consumption is reduced, and the air outlet is uniform.
Referring to fig. 1, in an embodiment, the heat conducting structure 1 is made of an alloy material.
In the above embodiment, the heat conducting structure 1 is made of an alloy material with high heat conductivity and high temperature deformation resistance, and is used for transferring heat from the inner side to the outer side, so as to reduce baking time and reduce energy consumption.
Referring to fig. 1, in one embodiment, the heating member 5 is detachably provided on the rail 4.
In the above embodiment, the heating member 5 is detachably provided on the rail 4, so that the heating member 5 can be easily detached from the rail 4, and the heating member 5 can be replaced or maintained.
In an embodiment, a heating component is disposed in the heating element 5, and the heating component includes at least one of an electric heating wire, an electric heating tube, and a heating furnace.
In the above embodiment, the heating component includes at least one of an electric heating wire, an electric heating tube, and a heating furnace, or may be a combination of these, and the electric energy conversion device converts mechanical energy into electric energy to provide electric energy for the heating component, where the electric heating wire, the electric heating tube, and the heating furnace can perform heating in various manners.
The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes using the descriptions and drawings of the present utility model or directly or indirectly applied to other related technical fields are included in the scope of the utility model.
Claims (10)
1. A winding device of pole piece for heating pole piece, characterized by comprising:
the winding heating structure is used for generating heat;
the heat conduction structure is arranged at the outer side of the winding heating structure and is used for winding the pole piece and transmitting heat generated by the winding heating structure.
2. The winding device of a pole piece according to claim 1, wherein the winding heating structure comprises a winding drum and a heating member, the heating member being disposed on the winding drum.
3. The winding device of a pole piece according to claim 2, wherein a track is provided on the winding drum, the track is provided along a length direction of the winding drum, the heating member is laid on the track, and the heating member is slidable on the track.
4. The winding device of the pole piece according to claim 2, wherein the winding heating structure further comprises an electric energy conversion device, and the electric energy conversion device is arranged on the winding heating structure; the electric energy conversion device is used for converting mechanical energy into electric energy.
5. A winding device of a pole piece according to claim 3, wherein a plurality of the tracks are provided on the winding drum, the plurality of the tracks being provided at equal angles along the circumference of the winding drum; at least two heating elements are paved on each track.
6. The winding device of the pole piece according to claim 1, wherein the heat conducting structure is sleeved outside the winding heating structure.
7. The winding device of a pole piece according to claim 1, wherein the heat conducting structure is a hollow cylinder with two open ends.
8. The winding device of the pole piece according to claim 1, wherein a plurality of heat dissipation holes are formed in the heat conduction structure, and the plurality of heat dissipation holes are uniformly formed in the heat conduction structure.
9. The pole piece winding device of claim 5, wherein the heating element is removably disposed on the track.
10. The winding device of the pole piece according to claim 2, wherein a heating component is arranged in the heating component, and the heating component comprises at least one of an electric heating wire, an electric heating tube and a heating furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321705856.XU CN220283048U (en) | 2023-06-30 | 2023-06-30 | Winding device of pole piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321705856.XU CN220283048U (en) | 2023-06-30 | 2023-06-30 | Winding device of pole piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220283048U true CN220283048U (en) | 2024-01-02 |
Family
ID=89337449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321705856.XU Active CN220283048U (en) | 2023-06-30 | 2023-06-30 | Winding device of pole piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220283048U (en) |
-
2023
- 2023-06-30 CN CN202321705856.XU patent/CN220283048U/en active Active
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