CN220233233U - Battery pole piece rolling device - Google Patents
Battery pole piece rolling device Download PDFInfo
- Publication number
- CN220233233U CN220233233U CN202321810191.9U CN202321810191U CN220233233U CN 220233233 U CN220233233 U CN 220233233U CN 202321810191 U CN202321810191 U CN 202321810191U CN 220233233 U CN220233233 U CN 220233233U
- Authority
- CN
- China
- Prior art keywords
- roller
- pole piece
- battery pole
- power supply
- heating power
- Prior art date
- Legal status (The legal status 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 status listed.)
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Links
- 238000005096 rolling process Methods 0.000 title claims abstract description 35
- 238000010438 heat treatment Methods 0.000 claims abstract description 44
- 239000000463 material Substances 0.000 claims abstract description 29
- 239000000758 substrate Substances 0.000 claims description 22
- 239000011248 coating agent Substances 0.000 claims description 16
- 238000000576 coating method Methods 0.000 claims description 16
- 238000004804 winding Methods 0.000 claims description 9
- 239000011888 foil Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 239000011889 copper foil Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims 1
- 239000013543 active substance Substances 0.000 abstract description 4
- 238000012546 transfer Methods 0.000 abstract description 4
- 238000005336 cracking Methods 0.000 abstract description 2
- 239000011149 active material Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000007731 hot pressing Methods 0.000 description 4
- 239000007769 metal material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 239000006255 coating slurry Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000011160 research 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
Landscapes
- Battery Electrode And Active Subsutance (AREA)
Abstract
The utility model relates to a battery pole piece rolling device which comprises a frame, a first roller, a second roller and a heating power supply, wherein the first roller is connected with the frame; the first roller is rotationally connected with the frame, the second roller is rotationally connected with the frame, the wheel shafts of the second roller and the first roller are mutually parallel, a material passing gap is formed between the second roller and the first roller, and the first roller and the second roller are configured to roll the battery pole piece when the battery pole piece passes through the material passing gap; the positive connection terminal and the negative connection terminal of the heating power supply are respectively and electrically connected with two ends of the extending direction of the battery pole piece, and the heating power supply is configured to enable the battery pole piece to be electrified and heated after being started; the utility model directly electrifies the pole piece to heat, heats the coated active substance through heat transfer, enhances the ductility of the conductive base material and the active substance, improves the processability, and avoids cracking or belt breakage when the pole piece is rolled.
Description
Technical Field
The utility model relates to the technical field of battery production and processing, in particular to a battery pole piece rolling device.
Background
As the market share of new energy automobiles increases year by year, higher challenges are also presented to the performance of the power batteries of the automobiles; the method for improving the energy density in the design of the power battery cell comprises the steps of improving the gram capacity of nickel and cobalt in the ternary material, and correspondingly improving the safety risk of the battery due to the high-proportion material; another way to increase the energy density is to increase the coating weight of the pole pieces, thereby increasing the space utilization within the battery.
When the coating weight is higher, the edge of the substrate coating area and the uncoated empty foil area have the difference of height gradient and extensibility, the stress distribution is uneven in the rolling process, and the empty foil area cannot bear force, so that the substrate of the pole piece is broken, and the consistency of the thickness of the pole piece and the battery performance are affected; therefore, the existing production lacks a rolling device capable of solving the problem of substrate belt breakage in the high-coating heavy process.
Disclosure of Invention
Therefore, the technical problem to be solved by the utility model is to overcome the technical difficulty that the stress distribution of the pole piece is uneven and the pole piece is easy to break in the high-coating heavy process in the prior art, and provide the battery pole piece rolling device which improves the ductility of the base material and the processability of the coating material.
In order to solve the technical problems, the utility model provides a battery pole piece rolling device, which comprises,
a frame;
the first roller is rotationally connected with the frame;
the second roller is rotationally connected with the frame; the wheel shafts of the second roller and the first roller are arranged in parallel, a material passing gap is formed between the second roller and the first roller, and the first roller and the second roller are configured to roll the battery pole piece when the battery pole piece passes through the material passing gap;
and the heating power supply is configured to enable the battery pole piece to be electrified and heated after being started.
In one embodiment of the utility model, the operating voltage of the heating power supply is less than 36V.
In one embodiment of the utility model, the battery pole piece comprises a conductive substrate and a coating area arranged on the surface of the conductive substrate, and the positive and negative connection terminals of the heating power supply are contacted with the non-coating area of the conductive substrate.
In one embodiment of the present utility model, the surface temperature of the conductive substrate is 50 ℃ to 70 ℃ when the heating power supply and the battery pole piece are electrically connected.
In one embodiment of the utility model, the conductive substrate is provided as copper foil or aluminum foil.
In one embodiment of the utility model, the battery pole piece is transported between the unwind roller and the wind-up roller.
In one embodiment of the utility model, the unreeling roller is rotatably connected with the rack, the unreeling roller is provided with a first conductive roller shaft, one end of the battery pole piece is wound around the first conductive roller shaft, and one connecting terminal of the heating power supply is electrically connected with the first conductive roller shaft.
In one embodiment of the utility model, the winding roller is rotatably connected with the frame, the winding roller is provided with a second conductive roller shaft, the other end of the battery pole piece is wound around the second conductive roller shaft, and the other connecting terminal of the heating power supply is electrically connected with the second conductive roller shaft.
In one embodiment of the utility model, the battery pole piece winding device further comprises a plurality of guide rollers, wherein the guide rollers are arranged between the unreeling roller and the winding roller and are positioned on the conveying path of the battery pole piece.
In one embodiment of the utility model, two ends of the first roller in the axial direction are connected with the rotation output end of the frame through a first bearing; and two ends of the second roller in the axial direction are connected with the rotating output end of the frame through a second bearing.
Compared with the prior art, the technical scheme of the utility model has the following advantages:
according to the battery pole piece rolling device, the electric and physical characteristics of the conductive base material of the battery pole piece are utilized, the conductive base material is directly electrified to generate heat, the active substances coated on the surface of the conductive base material are heated through heat transfer, the ductility of the conductive base material and the active substances is enhanced after heating, the processability is improved, and further cracking or breakage of the pole piece during rolling is avoided; compared with the heating effect of hot pressing of a heating roller, the utility model has more direct heating effect and better heating effect, and can be suitable for the production of battery pole pieces with various packaging structures; compared with the secondary rolling processing efficiency, the device is simpler and the cost is lower.
Drawings
In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings, in which:
FIG. 1 is a schematic view of a battery pole piece rolling device in accordance with a preferred embodiment of the present utility model;
fig. 2 is a schematic view showing the structures of the first roller, the second roller and the frame in the preferred embodiment of the present utility model.
Description of the specification reference numerals: 1. a frame; 2. a first roller; 21. a first bearing; 3. a second roller; 31. a second bearing; 4. a conductive substrate; 5. a heating power supply; 6. an unreeling roller; 61. a first conductive roller shaft; 7. a wind-up roll; 71. a second conductive roller shaft; 8. and a guide roller.
Detailed Description
The present utility model will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the utility model and practice it.
Examples
In order to solve the rolling problem in the background technology, one scheme for avoiding belt breakage in the existing production is secondary rolling, namely rolling a pole piece to a certain thickness, then rolling again to reach a preset thickness and density, and solving the belt breakage problem by reducing the stress on the pole piece when rolling each time, wherein the secondary rolling has higher complex cost and increased labor and time cost compared with a primary rolling device, and has poorer popularization; in the prior art, the hot-pressing heat transfer is carried out by a heating roller, the processability of coating slurry and a substrate is improved under the high-temperature condition, the inventor researches that the rolled battery pole piece comprises the substrate made of metal as a current collector and also comprises an active material layer coated on the surface of the current collector, and the battery pole piece is generally coated on two sides, namely, the two surfaces of the current collector in the thickness direction are coated with the active material, so that the heating roller is directly contacted with the active material in the rolling process, and the current collector in the middle layer is indirectly heated by heat transfer, and the heating roller has larger heat loss in the hot-pressing mode, the heating effect on the current collector is limited, and the active material is easily cracked due to uneven internal and external temperatures when being directly contacted with the heating roller; accordingly, the present utility model provides a battery pole piece rolling device, overcoming the above drawbacks, as shown in fig. 1 to 2, comprising a frame 1, a first roller 2, a second roller 3 and a heating power supply 5; the first roller 2 and the second roller 3 are used for rolling the battery pole piece, the positive connection terminal and the negative connection terminal of the heating power supply 5 are respectively electrically connected with two ends of the extending direction of the battery pole piece, the heating power supply 5 is configured to enable the battery pole piece to be electrified and heated after being started, ductility and workability of the battery pole piece are improved at high temperature by directly acting on a current collector, and the heating effect is better, the applicable range is larger, the processing efficiency of the battery pole piece is not affected, and the control of production cost is facilitated compared with a hot-pressing mode of the heating roller.
Specifically, the first roller 2 is rotationally connected with the frame 1, and two ends of the first roller 2 in the axial direction are connected with a rotation output end of the frame 1 through a first bearing 21; the second roller 3 is rotationally connected with the frame 1, two ends of the axis direction of the second roller 3 are connected with a rotation output end of the frame 1 through a second bearing 31, the frame 1 drives the first roller 2 and the second roller 3 to reversely rotate through the rotation output end, the axles of the second roller 3 and the first roller 2 are mutually parallel, a material passing gap is formed between the second roller 3 and the first roller 2, and the first roller 2 and the second roller 3 are configured to roll the battery pole piece when the battery pole piece passes through the material passing gap.
Specifically, the battery pole piece comprises a conductive base material 4 and an active material layer coated on the surface of the conductive base material 4, wherein the area of the surface of the conductive base material 4 coated with the active material is set as a coating area, and the area of the surface of the conductive base material 4 outside the active material is set as a non-coating area; in some embodiments, the two surfaces of the conductive substrate 4 in the thickness direction are provided with the coating regions, the coating regions are spaced on the surface of the conductive substrate 4, and in some embodiments, the conductive substrate 4 is a current collector of the battery when the battery pole piece is assembled into the battery.
Further, in some embodiments, the positive and negative terminals of the heating power supply 5 contact the non-coating area of the conductive substrate 4, so as to directly heat the conductive substrate 4 by energizing. In some embodiments, the battery pole piece rolling device further comprises an unreeling roller 6 and a reeling roller 7, the battery pole piece being transferred between the unreeling roller 6 and the reeling roller 7; the unreeling roller 6 is rotatably connected with the rack 1, the unreeling roller 6 is provided with a first conductive roller shaft 61, and one end of the extending direction of the battery pole piece is wound on the first conductive roller shaft 61; the wind-up roller 7 is rotatably connected with the frame 1, the wind-up roller 7 is provided with a second conductive roller shaft 71, and the other end of the battery pole piece in the extending direction is wound on the second conductive roller shaft 71. One of the connection terminals of the heating power supply 5 is connected or contacted with the first conductive roller shaft 61 to form an electrical connection; the other connecting terminal of the heating power supply 5 is connected or contacted with the second conductive roller shaft 71 to form electric connection, and after the heating power supply 5 is started, current is transmitted to the battery pole piece by the heating power supply 5 through the first conductive roller shaft 61 and/or the second conductive roller shaft 71. In some embodiments, the heating power supply 5 may be configured as an external power supply for easy adjustment and maintenance, or may be disposed inside the rack 1 to improve the integration of the device.
Further, referring to fig. 1, in some embodiments, the battery pole piece rolling device further includes a plurality of guide rollers 8, where the guide rollers 8 are disposed between the unreeling roller 6 and the reeling roller 7 and are located on the conveying path of the battery pole piece, and the guide rollers 8 are used to control the conveying direction of the battery pole piece; in some embodiments, the guiding rollers 8 at two sides of the passing gap control the conveying direction of the battery pole piece to be perpendicular to the axle connecting line of the first roller 2 and the second roller 3, so that two side surfaces of the battery pole piece are uniformly rolled when passing through the passing gap.
Further, the conductive base material 4 is provided as a metal material having a certain electric resistivity and thermal conductivity, so that the conductive base material 4 can be energized to generate electric current and can generate sufficient heat when energized; it should be noted that the resistivity of the metal material is continuously reduced along with the temperature rise, the current which can be borne is gradually increased, equipment damage is easy to be caused, and potential safety hazards exist, so in the preferred embodiment of the utility model, the working voltage of the heating power supply 5 is less than 36V and is preferably set to 24V, the current can be controlled within the safe current value of a human body, the production safety is ensured, the heating power of the battery pole piece after the battery pole piece is electrified is less than 3000W, and the surface temperature of the conductive substrate 4 after the battery pole piece is electrified is 20-100 ℃; when the working voltage of the heating power supply 5 is set to be 24V, the heating power of the battery pole piece after being electrified is 1000W, and the temperature of the conductive substrate 4 is 50-70 ℃; in combination with the battery assembly requirements and the electrical, thermal and physical properties of the metallic material, in some embodiments, the conductive substrate 4 is provided as copper foil or aluminum foil.
The working principle of the battery pole piece rolling device is as follows:
referring to fig. 1 and 2, the two ends of the battery pole piece are wound on the first conductive roller shaft 61 and the second conductive roller shaft 71, the unwinding roller 6 performs the unwinding of the battery pole piece, and the battery pole piece is guided by the guide roller 8, is conveyed to pass through the material passing gap between the first roller 2 and the second roller 3, and is wound on the winding roller 7. Starting a heating power supply 5, and transmitting current through the conductive base material 4 to form a closed loop, wherein the conductive base material 4 heats after being electrified and transmits heat to the active material layer coated on the surface; the high temperature changes the processability of the conductive substrate 4 and the coating area, so that the battery pole piece is not easy to crack or break when rolled.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present utility model will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.
Claims (10)
1. A battery pole piece rolling device is characterized by comprising,
a frame (1);
the first roller (2) is rotationally connected with the frame (1);
the second roller (3) is rotationally connected with the frame (1); the wheel shafts of the second roller (3) and the first roller (2) are arranged in parallel, a material passing gap is formed between the second roller (3) and the first roller (2), and the first roller (2) and the second roller (3) are configured to roll the battery pole piece when the battery pole piece passes through the material passing gap;
and the heating power supply (5), positive and negative connecting terminals of the heating power supply (5) are respectively and electrically connected with two ends of the extending direction of the battery pole piece, and the heating power supply (5) is configured to enable the battery pole piece to be electrified and heated after being started.
2. The battery pole piece rolling device according to claim 1, wherein: the operating voltage of the heating power supply (5) is less than 36V.
3. The battery pole piece rolling device according to claim 1, wherein: the battery pole piece comprises a conductive base material (4) and a coating area arranged on the surface of the conductive base material (4), and both positive and negative connecting terminals of the heating power supply (5) are contacted with a non-coating area of the conductive base material (4).
4. A battery pole piece rolling device according to claim 3, characterized in that: when the heating power supply (5) is electrically connected with the battery pole piece, the surface temperature of the conductive substrate (4) is 50-70 ℃.
5. A battery pole piece rolling device according to claim 3, characterized in that: the conductive substrate (4) is provided as copper foil or aluminum foil.
6. The battery pole piece rolling device according to claim 1, wherein: the battery pole piece is characterized by further comprising an unreeling roller (6) and a reeling roller (7), wherein the battery pole piece is conveyed between the unreeling roller (6) and the reeling roller (7).
7. The battery pole piece rolling device of claim 6, wherein: unreeling roller (6) rotate and connect frame (1), unreel roller (6) have first electrically conductive roller (61), the one end of battery pole piece is around first electrically conductive roller (61) coiling sets up, one of them binding post of heating power supply (5) with first electrically conductive roller (61) electricity is connected.
8. The battery pole piece rolling device of claim 7, wherein: the winding roller (7) is rotationally connected with the frame (1), the winding roller (7) is provided with a second conductive roller shaft (71), the other end of the battery pole piece is wound around the second conductive roller shaft (71), and the other connecting terminal of the heating power supply (5) is electrically connected with the second conductive roller shaft (71).
9. The battery pole piece rolling device of claim 6, wherein: the battery pole piece winding device further comprises a plurality of guide rollers (8), wherein the guide rollers (8) are arranged between the unwinding roller (6) and the winding roller (7) and are positioned on the conveying path of the battery pole piece.
10. The battery pole piece rolling device according to claim 1, wherein: the two ends of the first roller (2) in the axial direction are connected with the rotation output end of the frame (1) through a first bearing (21); the two ends of the second roller (3) in the axial direction are connected with the rotating output end of the frame (1) through a second bearing (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321810191.9U CN220233233U (en) | 2023-07-11 | 2023-07-11 | Battery pole piece rolling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321810191.9U CN220233233U (en) | 2023-07-11 | 2023-07-11 | Battery pole piece rolling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220233233U true CN220233233U (en) | 2023-12-22 |
Family
ID=89173253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321810191.9U Active CN220233233U (en) | 2023-07-11 | 2023-07-11 | Battery pole piece rolling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220233233U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117558921A (en) * | 2024-01-12 | 2024-02-13 | 宁德时代新能源科技股份有限公司 | Electrode manufacturing method, battery, and electricity using device |
| CN117558921B (en) * | 2024-01-12 | 2024-05-28 | 宁德时代新能源科技股份有限公司 | Electrode manufacturing method, battery, and electricity using device |
-
2023
- 2023-07-11 CN CN202321810191.9U patent/CN220233233U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117558921A (en) * | 2024-01-12 | 2024-02-13 | 宁德时代新能源科技股份有限公司 | Electrode manufacturing method, battery, and electricity using device |
| CN117558921B (en) * | 2024-01-12 | 2024-05-28 | 宁德时代新能源科技股份有限公司 | Electrode manufacturing method, battery, and electricity using device |
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