CN220774414U - High-capacity cylindrical and square winding battery pole piece and winding battery - Google Patents
High-capacity cylindrical and square winding battery pole piece and winding battery Download PDFInfo
- Publication number
- CN220774414U CN220774414U CN202322365066.8U CN202322365066U CN220774414U CN 220774414 U CN220774414 U CN 220774414U CN 202322365066 U CN202322365066 U CN 202322365066U CN 220774414 U CN220774414 U CN 220774414U
- Authority
- CN
- China
- Prior art keywords
- pole piece
- battery
- battery pole
- wound battery
- capacity cylindrical
- 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.)
- Active
Links
- 238000004804 winding Methods 0.000 title claims abstract description 22
- 239000011149 active material Substances 0.000 claims abstract description 8
- 239000011248 coating agent Substances 0.000 claims abstract description 8
- 238000000576 coating method Methods 0.000 claims abstract description 8
- 239000013543 active substance Substances 0.000 claims abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 238000009826 distribution Methods 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 abstract 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract 1
- 125000004122 cyclic group Chemical group 0.000 abstract 1
- 229910052744 lithium Inorganic materials 0.000 abstract 1
- 229910052708 sodium Inorganic materials 0.000 abstract 1
- 239000011734 sodium Substances 0.000 abstract 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 6
- 229910001415 sodium ion Inorganic materials 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012795 verification 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Secondary Cells (AREA)
Abstract
The utility model relates to the technical field of batteries, in particular to a high-capacity cylindrical and square winding battery pole piece and a winding battery. The positive and negative plates of the wound battery comprise: lugs and current collectors; the current collector is provided with a pole piece active substance coating area; the electrode lugs are connected with the current collector; the wound battery pole piece is provided with a plurality of virtual connecting bands. The wound battery pole piece provided by the utility model is provided with the virtual connecting belt, and the virtual connecting belt penetrates through the current collector and the pole piece active material coating area, so that the problems that the positive pole piece and the negative pole piece are wrinkled, pulverized and separated from lithium or sodium due to uneven stress distribution in the production and charge-discharge cyclic use process of the winding core can be reduced, the electrical property of the battery is prevented from being influenced, and the service life of the battery is prolonged.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a high-capacity cylindrical and square winding battery pole piece and a winding battery.
Background
Along with the continuous breakthrough of material technology and manufacturing process of secondary batteries such as lithium ion batteries, the secondary batteries are widely applied to various fields, and various convenience is brought to the production and life of people. However, in the process of mass production and application of the secondary battery, people find that when the battery is developed towards a large capacity, the existing positive and negative pole pieces have the problems of wrinkling, cracking, powder falling, breakage and the like caused by uneven stress distribution due to charge-discharge expansion and shrinkage in the use process, so that the performance and the service life of the battery core are seriously influenced, and the battery core is taken as an important component part of the secondary battery, directly influences the performance and the service life of the secondary battery, and also limits the mass popularization and application of the secondary battery.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model aims to provide a positive and negative pole piece of a cylindrical and square winding battery with high capacity and a winding battery.
The object of the utility model is achieved by at least one of the following technical solutions.
The utility model provides a positive and negative electrode plate of a high-capacity cylindrical and square winding battery, which comprises the following components: lugs and current collectors; the current collector is provided with a pole piece active substance coating area; the electrode lugs are connected with the current collector; the positive and negative plates of the high-capacity cylindrical and square winding battery are provided with a plurality of virtual connecting bands.
Further, the virtual connection belt is composed of a plurality of fracture holes.
Further, the fracture hole is in the shape of more than one of a strip, a fold line, a circle and a wave.
Further, the fracture holes are distributed at intervals.
Preferably, the fracture holes are equally spaced apart.
Further preferably, the interval between the fracture holes of two adjacent fracture holes is 0.2 mm-50 mm;
further preferably, the distance between the two adjacent breaking belts is 20 to 500mm.
Further, the virtual connecting belt is perpendicular to the long axis direction of the positive and negative pole pieces of the large-capacity cylindrical and square winding battery.
Further, the dummy connection band is disposed on both the electrode active material coated region and the region of the current collector not coated with the electrode active material.
The present utility model provides a wound battery comprising:
a diaphragm and two positive and negative plates of the high-capacity cylindrical and square winding battery; the separator is disposed between two wound battery pole pieces.
Compared with the prior art, the utility model has the following advantages and beneficial effects:
the positive and negative pole pieces of the high-capacity cylindrical and square winding battery provided by the utility model are provided with the virtual connecting bands, and the virtual connecting bands penetrate through the current collector and the pole piece active material coating areas, so that the problem that the pole pieces are wrinkled due to uneven stress distribution in the production and use processes of the winding core can be reduced, the electric performance of the battery is prevented from being influenced, the service life of the battery is prolonged, the battery is particularly suitable for large-size pole pieces, and the prepared winding battery is particularly suitable for large-capacity battery cores with the pole pieces as long as tens of meters, the problem of internal stress concentration is well solved, and besides, the battery performance is better.
Drawings
FIG. 1 is a schematic view of a pole piece structure provided by an embodiment of the present utility model;
wherein, 1 is pole piece, 2 is current collector, 3 is tab, 4 is virtual connecting band, 5 is pole piece active material coating area.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
In the description of the present utility model, it should be understood that references to orientation descriptions such as terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present utility model.
In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
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; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The embodiment provides a positive and negative pole piece of cylinder and square coiling battery of large capacity, includes:
comprising the following steps: a tab 3 and a current collector 2; the current collector 2 is provided with a pole piece active substance coating area 5; the electrode lug 3 is connected with the current collector 2; a plurality of virtual connecting bands 4 are arranged on the positive and negative plates 1 of the high-capacity cylindrical and square winding battery.
The dummy connection strips 4 are distributed not only over the pole piece active material coated areas 5 on the current collector 2, but also over the areas of the current collector 2 not coated with active material.
Further, the dummy connection band 4 is composed of a plurality of breaking holes.
Further, the fracture hole is in the shape of more than one of a strip, a fold line, a circle and a wave.
Further, the fracture holes are distributed at intervals.
Further preferably, the fracture holes are equally spaced apart. The interval between the two adjacent fracture holes is 0.2-50 mm, and the distance between the two adjacent fracture belts is 20-500 mm.
Further, the virtual connection belt 4 is perpendicular to the long axis direction of the wound battery pole piece.
Further, the tab 3 is connected with the current collector 2.
A wound battery comprising:
the separator, the positive and negative plates of the high-capacity cylindrical and square winding battery and the electrolyte; the diaphragm is arranged between two high-capacity cylindrical and square wound battery positive and negative electrode plates (the two wound battery electrode plates are respectively used as positive electrodes and negative electrodes); the electrolyte acts as a medium between the positive and negative electrodes so that ions can move between the positive and negative electrodes.
Effect verification
By way of example, the positive and negative electrode sheets of the high capacity cylindrical and square wound battery of the example (the wound battery electrode sheet structure is shown here with reference to fig. 1) were assembled into a sodium ion wound battery. The sodium ion battery assembled in the embodiment is identical to the existing sodium ion battery except for the structure and the size of the wound battery pole piece.
The sodium ion wound battery provided in this example was tested using the test methods described in standard IEC62660 and standard GB/T31467.1. The test results are shown in table 1 below. For comparison analysis, this example also assembled a sodium ion wound battery of the prior art (labeled as a control group) in addition to the wound battery pole piece prepared using the structure shown in fig. 1 to form a sodium ion battery (labeled as an experimental group).
As can be seen from the results in table 1 below, the wound battery pole piece provided by the utility model is provided with the virtual connecting band, and the virtual connecting band penetrates through the current collector and the pole piece active material coating area, so that the problem that the positive pole piece and the negative pole piece are wrinkled due to uneven stress distribution in the production and use process of the winding core can be reduced, the electric performance of the battery is prevented from being influenced, the service life of the battery, especially in the use process of high current, is prolonged, and the effect is more obvious as the battery is larger.
TABLE 1
The above examples are only preferred embodiments of the present utility model, and are merely for illustrating the present utility model, not for limiting the present utility model, and those skilled in the art should not be able to make any changes, substitutions, modifications and the like without departing from the spirit of the present utility model.
Claims (10)
1. A high capacity cylindrical and square wound battery pole piece comprising: a tab (3) and a current collector (2); a pole piece active substance coating area (5) is arranged on the current collector (2); the electrode lug (3) is connected with the current collector (2); the high-capacity cylindrical and square winding battery pole piece is provided with a plurality of virtual connecting bands (4).
2. The high capacity cylindrical and square wound battery pole piece according to claim 1, characterized in that the virtual connection strip (4) consists of several break holes.
3. The high capacity cylindrical and square wound battery pole piece of claim 2, wherein the fracture hole is one or more of elongated, folded, circular, and wavy.
4. The high capacity cylindrical and square wound battery pole piece of claim 2, wherein the break holes are spaced apart.
5. The high capacity cylindrical and square wound battery pole piece of claim 4, wherein the break holes are equally spaced apart.
6. The high capacity cylindrical and square wound battery pole piece of claim 4, wherein two adjacent break holes are spaced apart by 0.2mm to 50mm.
7. The high capacity cylindrical and square wound battery pole piece of claim 1, wherein the distance between two adjacent virtual connection strips is 20-500 mm.
8. The high capacity cylindrical and square wound battery pole piece according to claim 1, wherein the virtual connection strip (4) is perpendicular to the long axis direction of the high capacity cylindrical and square wound battery pole piece.
9. The high capacity cylindrical and square wound battery pole piece according to claim 1, characterized in that the virtual connection strip (4) is arranged on both the pole piece active material coated area (5) and the area of the current collector (2) not coated with pole piece active material.
10. A wound battery, comprising:
a separator and two high capacity cylindrical and square wound battery pole pieces according to any one of claims 1-9; the separator is disposed between two wound battery pole pieces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322365066.8U CN220774414U (en) | 2023-08-31 | 2023-08-31 | High-capacity cylindrical and square winding battery pole piece and winding battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322365066.8U CN220774414U (en) | 2023-08-31 | 2023-08-31 | High-capacity cylindrical and square winding battery pole piece and winding battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220774414U true CN220774414U (en) | 2024-04-12 |
Family
ID=90612285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322365066.8U Active CN220774414U (en) | 2023-08-31 | 2023-08-31 | High-capacity cylindrical and square winding battery pole piece and winding battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220774414U (en) |
-
2023
- 2023-08-31 CN CN202322365066.8U patent/CN220774414U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107834014B (en) | High-power cylindrical lithium ion battery cell | |
| CN111668451B (en) | Preparation method of pole piece for winding type multi-pole lug battery cell, pole piece and battery cell | |
| EP1810362B1 (en) | Winding assembly type lithium ion secondary power batteries | |
| CN207611809U (en) | A kind of anode slice of lithium ion battery and lithium ion battery | |
| CN101656330A (en) | Method for making lithium-ion battery cells | |
| CN218333895U (en) | Cylinder electricity core full-lug roll core structure | |
| WO2023071667A1 (en) | Lithium ion battery and separator thereof | |
| CN208603718U (en) | A kind of battery core and the lithium ion battery comprising it | |
| CN110400959A (en) | A kind of winding double-core packet, winding double-core pack the method for making and lithium ion battery | |
| CN111640994A (en) | Battery roll core and manufacturing method of lithium battery using same | |
| CN214957245U (en) | Symmetrical battery | |
| CN114497443A (en) | Electrode sheet, electrochemical device, and electronic apparatus | |
| CN220774414U (en) | High-capacity cylindrical and square winding battery pole piece and winding battery | |
| CN219873592U (en) | Battery cell | |
| CN211045637U (en) | Polymer battery cell | |
| CN218351674U (en) | Cylinder battery tab, cylinder battery pole piece and cylinder battery | |
| CN216015521U (en) | Battery with a battery cell | |
| CN215771249U (en) | Lithium ion battery and vehicle comprising same | |
| CN108258327A (en) | Laminated lithium ion battery core and its assemble method and the laminated lithium ion battery for including laminated lithium ion battery core | |
| CN211605265U (en) | Low internal resistance lithium battery pole piece and cylindrical lithium battery | |
| CN209282293U (en) | Winding type battery | |
| CN220439679U (en) | Lithium ion battery with six-mango star structure | |
| CN220963676U (en) | Negative electrode current collecting disc and cylindrical battery | |
| CN217009346U (en) | Lithium battery structure with high utilization rate | |
| CN220065739U (en) | Pole piece unit, battery cell, battery and battery device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |