CN219873642U - Laminated cylindrical lithium ion battery structure - Google Patents
Laminated cylindrical lithium ion battery structure Download PDFInfo
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- CN219873642U CN219873642U CN202223308119.4U CN202223308119U CN219873642U CN 219873642 U CN219873642 U CN 219873642U CN 202223308119 U CN202223308119 U CN 202223308119U CN 219873642 U CN219873642 U CN 219873642U
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 33
- 238000002955 isolation Methods 0.000 claims description 24
- 238000003466 welding Methods 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 11
- -1 polyethylene Polymers 0.000 description 8
- 239000002033 PVDF binder Substances 0.000 description 6
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 6
- 239000004698 Polyethylene Substances 0.000 description 5
- 239000004743 Polypropylene Substances 0.000 description 5
- 239000003792 electrolyte Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- 238000007731 hot pressing Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction 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
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- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model discloses a laminated cylindrical lithium ion battery structure. The laminated cylindrical lithium ion battery structure comprises: the battery cell and the battery shell are vertically arranged in the battery shell; the battery cell comprises a plurality of positive plates, a positive parallel lead, a plurality of negative plates, a negative parallel lead and a diaphragm; the positive plates and the negative plates are sequentially and alternately arranged; the positive electrode parallel lead and the negative electrode parallel lead extend along the height direction of the battery core, the plurality of negative electrode plates are electrically connected with the negative electrode parallel lead, and the plurality of positive electrode plates are electrically connected with the positive electrode parallel lead; along the height direction of the battery cell, the diaphragm is folded in a serpentine shape, the adjacent positive plate and the negative plate are separated by the diaphragm, the negative plate and the positive parallel lead are separated by the diaphragm, and the positive plate and the negative parallel lead are separated by the diaphragm. The laminated cylindrical lithium ion battery designed by the embodiment of the utility model has simple manufacturing process, can avoid the occurrence of short circuit of the anode and the cathode, and improves the safety of the laminated cylindrical lithium ion battery.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a laminated cylindrical lithium ion battery structure.
Background
Along with the continuous promotion of the information electrical age, various mobile electrical equipment is increasingly widely applied in daily life of people, meanwhile, the environmental awareness of people is continuously improved, and a mobile power supply which can meet the requirements of masses and has excellent performance is key. The lithium ion battery is a product of high technology in the era, and has the characteristics of high specific capacity, high voltage, safety, reliability, green and environment friendliness and the like, so that the lithium ion battery becomes a representative of modern high-performance batteries.
The main stream manufacturing process of the cylindrical battery in the market has higher efficiency, lower cost and more mature winding process, but the process is difficult to control the thermal isolation between the battery cells, so that the local overheating of the battery cells is easy to cause, and the risk of thermal runaway spreading exists; there is room in the middle of the winding process, resulting in lower energy density of the cells made by the winding process.
Disclosure of Invention
The utility model provides a laminated cylindrical lithium ion battery structure, which is simple in manufacturing process, can avoid the occurrence of short circuit of the anode and the cathode, and improves the safety of the laminated cylindrical lithium ion battery.
According to an aspect of the present utility model, there is provided a laminated cylindrical lithium ion battery structure, comprising:
the battery cell and the battery shell are vertically arranged in the battery shell;
the battery cell comprises a plurality of positive plates, a positive parallel lead, a plurality of negative plates, a negative parallel lead and a diaphragm;
the positive plates and the negative plates are sequentially and alternately arranged along the height direction of the battery core; the positive electrode parallel lead and the negative electrode parallel lead extend along the height direction of the battery cell, the plurality of negative electrode plates are electrically connected with the negative electrode parallel lead, and the plurality of positive electrode plates are electrically connected with the positive electrode parallel lead;
along the height direction of the battery cell, the diaphragm is folded in a serpentine shape, and adjacent positive plates and negative plates are separated by the diaphragm, the negative plates and the positive parallel lead are separated by the diaphragm, and the positive plates and the negative parallel lead are separated by the diaphragm.
Further, the diaphragm comprises a first connecting part, a second connecting part and a separation part;
the first connecting part and the second connecting part extend along the height direction of the battery cell, the first connecting part is positioned between the negative electrode plate and the positive electrode parallel connection lead, the second connecting part is positioned between the positive electrode plate and the negative electrode parallel connection lead, the isolation part is positioned between the adjacent positive electrode plate and the negative electrode plate or at one side of the positive electrode plate and the negative electrode plate, and the isolation parts are arranged at two sides of each positive electrode plate and each negative electrode plate;
the two isolation parts on two sides of the negative electrode plate are connected together through a first connection part, and the two isolation parts on two sides of the positive electrode plate are connected together through a second connection part.
Further, the shapes of the negative plate, the positive plate and the isolation part are all round;
the diameter of the negative plate is larger than that of the positive plate;
the diameter of the separator is larger than the diameter of the negative electrode sheet.
Further, the difference between the diameter of the negative plate and the diameter of the positive plate is greater than 1mm, and the difference between the diameter of the isolation part and the diameter of the negative plate is greater than 1mm.
Further, the thickness of the separator ranges from 1 μm to 50 μm.
Further, the separator includes a base film and insulating films on both sides of the base film.
Further, the material used for the base film comprises polyethylene or polypropylene, and the material used for the insulating film comprises polyvinylidene fluoride.
Further, the first connecting portion is perpendicular to the isolating portion, and the second connecting portion is perpendicular to the isolating portion.
Further, the positive electrode lug, the negative electrode lug and the battery positive electrode end cover; the battery anode end cover is positioned at one side of the battery shell;
the positive electrode parallel connection lead is electrically connected with a positive electrode lug, and the positive electrode lug is electrically connected with a battery positive electrode end cover;
the negative electrode lug is electrically connected with the negative electrode parallel lead;
the surfaces of the isolating parts farthest from the battery positive end cover, far away from the negative plate and the positive plate, of all the isolating parts are provided with negative electrode welding guide pieces, and the negative electrode lugs are electrically connected with the negative electrode welding guide pieces.
Further, the laminated cylindrical lithium ion battery structure further comprises:
the protective sleeve wraps the side wall of the battery cell and separates the battery cell from the battery shell.
The battery cell designed by the embodiment of the utility model comprises a plurality of positive plates, a positive parallel lead, a plurality of negative plates, a negative parallel lead and a diaphragm, wherein the plurality of negative plates are electrically connected with the negative parallel lead, so that each layer of negative plates can be connected in parallel, the plurality of positive plates are electrically connected with the positive parallel lead, and each layer of positive plates can be connected in parallel. The diaphragm is folded in a serpentine shape, the adjacent positive electrode plate and the negative electrode plate are separated by the diaphragm, the positive electrode plate and the positive electrode parallel lead are separated by the diaphragm, and the positive electrode plate and the negative electrode parallel lead are separated by the diaphragm, so that short circuits between the positive electrode plate and the negative electrode plate, between the positive electrode plate and the negative electrode parallel lead and between the negative electrode plate and the positive electrode parallel lead can be prevented. The laminated cylindrical lithium ion battery structure provided by the embodiment of the utility model has the advantages that the manufacturing process is simple, the occurrence of short circuit of the anode and the cathode can be avoided, the safety of the laminated cylindrical lithium ion battery is improved, the energy density of a cylindrical battery core is improved by the laminated process, the advantages of a large battery core can be better exerted, the yield of the battery core can be better controlled, and the battery capacity is greatly improved.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the utility model or to delineate the scope of the utility model. Other features of the present utility model will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic front cross-sectional view of a laminated cylindrical lithium ion battery cell according to an embodiment of the present utility model;
fig. 2 is a schematic front cross-sectional view of another laminated cylindrical lithium ion battery cell provided in an embodiment of the present utility model;
fig. 3 is a schematic front cross-sectional view of yet another laminated cylindrical lithium ion battery cell provided by an embodiment of the present utility model;
fig. 4 is a schematic diagram of the shapes and relative sizes of a negative plate, a positive plate and a diaphragm of a laminated cylindrical lithium ion battery cell according to an embodiment of the present utility model.
Detailed Description
In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
An embodiment of the present utility model provides a laminated cylindrical lithium ion battery structure, and fig. 1 is a schematic front cross-sectional view of a laminated cylindrical lithium ion battery cell provided by the embodiment of the present utility model, and referring to fig. 1, the laminated cylindrical lithium ion battery structure includes:
a battery cell 002 and a battery case 001, wherein the battery cell 002 is vertically housed in the battery case 001;
the battery cell 002 comprises a plurality of positive plates 1, a positive parallel lead 2, a plurality of negative plates 3, a negative parallel lead 4 and a diaphragm 5;
the positive electrode plates 1 and the negative electrode plates 3 are alternately arranged in sequence along the height direction of the battery cell 002; the positive electrode parallel connection lead 2 and the negative electrode parallel connection lead 4 extend along the height direction of the battery cell 002, the plurality of negative electrode pieces 3 are electrically connected with the negative electrode parallel connection lead 4, and the plurality of positive electrode pieces 1 are electrically connected with the positive electrode parallel connection lead 2;
along the height direction of the battery cell 002, the separator 5 is folded in a serpentine bend, and adjacent positive electrode tab 1 and negative electrode tab 3 are separated by the separator 5, negative electrode tab 3 and positive electrode parallel lead 2 are separated by the separator 5, and positive electrode tab 1 and negative electrode parallel lead 4 are separated by the separator 5.
Specifically, the positive plate 1 and the positive parallel lead 2 are welded together, so that all layers of positive plates 1 can be connected in parallel; the negative electrode sheet 3 and the negative electrode parallel lead 4 are welded together, so that the negative electrode sheets 3 of each layer can be connected in parallel. The separator 5 mainly prevents short circuits between the positive electrode sheet 1 and the negative electrode sheet 3, between the positive electrode sheet 1 and the negative electrode parallel lead 4, and between the negative electrode sheet 3 and the positive electrode parallel lead 2, and has high safety and can selectively permeate ions in the electrolyte. To prevent short circuit between the positive electrode sheet 1 and the negative electrode sheet 3, the diameter of the negative electrode sheet 3 may be, for example, 1mm larger than the diameter of the positive electrode sheet 1, and the diameter of the separator 5 1mm larger than the diameter of the negative electrode sheet 3; the diameter of the positive electrode sheet 1 may be 1mm larger than the diameter of the negative electrode sheet 3, the diameter of the separator 5 may be 1mm larger than the diameter of the positive electrode sheet 1, or the diameter of the separator 5 may be 1mm larger than the diameters of the positive electrode sheet 1 and the negative electrode sheet 3 at the same time, which is not limited in the embodiment of the present utility model. Specifically, the separator 5 is folded in a serpentine shape, and the adjacent positive electrode sheet 1 and negative electrode sheet 3 are separated by the separator 5, so that short circuit between the positive electrode sheet 1 and the negative electrode sheet 3 can be prevented; the negative plate 3 and the positive electrode parallel lead 2 are separated by the diaphragm 5, so that short circuit between the negative plate 3 and the positive electrode parallel lead 2 can be prevented; the positive plate 1 and the negative electrode parallel lead 4 are separated by the diaphragm 5, so that short circuit between the positive plate 1 and the negative electrode parallel lead 4 can be prevented.
Specifically, the separator 5 is folded in a serpentine shape, and an exemplary method may be to sequentially fold the separator 5 first 180 ° in the forward direction around the negative electrode sheet 3, then 180 ° in the reverse direction around the positive electrode sheet 1, then 180 ° in the forward direction around the negative electrode sheet 3, and so on to form a continuous lamination structure.
The battery cell designed by the embodiment of the utility model comprises a plurality of positive plates 1, a positive parallel lead 2, a plurality of negative plates 3, a negative parallel lead 4 and a diaphragm 5, wherein the plurality of negative plates 3 are electrically connected with the negative parallel lead 4, so that each layer of negative plates 3 can be connected in parallel, and the plurality of positive plates 1 are electrically connected with the positive parallel lead 2, so that each layer of positive plates 1 can be connected in parallel. The diaphragm 5 is folded in a serpentine shape, the adjacent positive electrode plate 1 and the negative electrode plate 3 are separated by the diaphragm, the negative electrode plate 3 and the positive electrode parallel lead 2 are separated by the diaphragm 5, the positive electrode plate 1 and the negative electrode parallel lead 4 are separated by the diaphragm 5, and short circuits between the positive electrode plate 1 and the negative electrode plate 2, between the positive electrode plate 1 and the negative electrode parallel lead 4 and between the negative electrode plate 3 and the positive electrode parallel lead 2 can be prevented. The laminated cylindrical lithium ion battery structure provided by the embodiment of the utility model has the advantages that the manufacturing process is simple, the occurrence of short circuit of the anode and the cathode can be avoided, the safety of the laminated cylindrical lithium ion battery is improved, the energy density of a cylindrical battery core is improved by the laminated process, the advantages of a large battery core can be better exerted, the yield of the battery core can be better controlled, and the battery capacity is greatly improved.
Fig. 2 is a schematic front cross-sectional view of another laminated cylindrical lithium ion battery cell according to an embodiment of the present utility model, optionally, referring to fig. 2, the separator includes a first connection portion 6, a second connection portion 7, and a separation portion 8;
the first connecting part 6 and the second connecting part 7 extend along the height direction of the battery cell, the first connecting part 6 is positioned between the negative electrode plate 3 and the positive electrode parallel lead 2, the second connecting part 7 is positioned between the positive electrode plate 1 and the negative electrode parallel lead 4, the isolation part 8 is positioned between the adjacent positive electrode plate 1 and the negative electrode plate 3 or is positioned at one side of the positive electrode plate 1 and the negative electrode plate 3, and the isolation parts 8 are arranged at two sides of each positive electrode plate 1 and each negative electrode plate 3;
the two isolation parts 8 on both sides of the negative electrode sheet 3 are connected together by a first connection part 6, and the two isolation parts 8 on both sides of the positive electrode sheet 1 are connected together by a second connection part 7.
Specifically, the first connecting portion 6 is located between the negative electrode sheet 3 and the positive electrode parallel lead 2, and can prevent short circuit between the negative electrode sheet 3 and the positive electrode parallel lead 2, the second connecting portion 7 is located between the positive electrode sheet 1 and the negative electrode parallel lead 4, and can prevent short circuit between the positive electrode sheet 1 and the negative electrode parallel lead 4, and the isolating portion 8 is located between the adjacent positive electrode sheet 1 and the negative electrode sheet 3, or is located on one side of the positive electrode sheet 1 and the negative electrode sheet 3, and each positive electrode sheet 1 and each negative electrode sheet 3 are both provided with isolating portions 8, and can prevent short circuit between the positive electrode sheet 1 and the negative electrode sheet 3.
Fig. 4 is a schematic diagram of the shapes and relative sizes of a negative electrode plate, a positive electrode plate and a separator of a laminated cylindrical lithium ion battery cell, and optionally, referring to fig. 2 and fig. 4, the shapes of the negative electrode plate 3, the positive electrode plate 1 and the separator 8 are all round;
the diameter of the negative plate 3 is larger than that of the positive plate 1;
the separator 8 has a diameter larger than that of the negative electrode sheet 3.
Specifically, the battery case of the lithium ion battery is cylindrical, and the shapes of the negative plate 3, the positive plate 1 and the isolation part 8 are designed to be round, so that the energy density of the cylindrical battery cell can be improved to the greatest extent. The diameter of the negative electrode plate 3 is larger than that of the positive electrode plate 1, the diameter of the isolation part 8 is larger than that of the negative electrode plate 3, the safety of the battery cell can be improved, and short circuit between the positive electrode plate 1 and the negative electrode plate 3 is better prevented.
Alternatively, with continued reference to fig. 2 and 4, the difference between the diameter of the negative electrode sheet 3 and the diameter of the positive electrode sheet 1 is greater than 1mm, and the difference between the diameter of the separator 8 and the diameter of the negative electrode sheet 3 is greater than 1mm.
Specifically, when the difference between the diameter of the negative electrode plate 3 and the diameter of the positive electrode plate 1 is smaller than 1mm and the difference between the diameter of the isolation part 8 and the diameter of the negative electrode plate 3 is smaller than 1mm, after the positive electrode plate 1, the negative electrode plate 3 and the isolation part 8 are assembled together and the hot pressing process is performed, the risk of contact short circuit between the negative electrode plate 3 and the positive electrode plate 1 exists; when the difference between the diameter of the negative electrode plate 3 and the diameter of the positive electrode plate 1 is larger than 1mm, and the difference between the diameter of the isolation part 8 and the diameter of the negative electrode plate 3 is larger than 1mm, after the positive electrode plate 1, the negative electrode plate 3 and the isolation part 8 are assembled together, the risk of contact short circuit between the negative electrode plate 3 and the positive electrode plate 1 can be greatly reduced after the hot pressing process is carried out.
Alternatively, the thickness of the separator ranges from 1 μm to 50 μm.
Specifically, if the thickness of the separator is too small, the mechanical strength of the separator is insufficient, weak current is easily generated between the positive plate and the negative plate after the hot pressing process is performed, and the separator is not beneficial to the separation between the positive plate and the negative plate; if the separator thickness is too large, the battery volume is occupied and the energy density of the cells is affected.
Alternatively, the separator includes a base film and insulating films located on both sides of the base film.
For example, polyethylene (PP) film or Polypropylene may be used
The (PE) film is a base film, and the insulating films located on both sides of the base film may be polyvinylidene fluoride (PVDF) glue. Specifically, PVDF glue is coated on two sides of the base film, so that the base film can be prevented from being corroded by electrolyte.
Alternatively, the material used for the base film includes polyethylene or polypropylene, and the material used for the insulating film includes polyvinylidene fluoride.
Specifically, the polyethylene base film and the polypropylene base film have good electrical property and excellent electrical insulation, and ions in the electrolyte can pass freely under the condition that the positive plate and the negative plate are not in short circuit. Polyvinylidene fluoride has excellent chemical resistance, excellent high-temperature resistance and oxidation resistance, and can prevent the base film from being corroded by electrolyte.
Alternatively, referring to fig. 2, the first connection portion 6 is perpendicular to the isolation portion 8, and the second connection portion 7 is perpendicular to the isolation portion 8.
Fig. 3 is a schematic front cross-sectional view of another laminated cylindrical lithium ion battery cell according to an embodiment of the present utility model, and optionally, referring to fig. 3, the laminated cylindrical lithium ion battery structure further includes:
a positive electrode lug 9, a negative electrode lug 10 and a battery positive electrode end cover 11; the battery positive electrode end cover 11 is positioned at one side of the battery case 001;
the positive electrode parallel connection lead belt 2 is electrically connected with the positive electrode lug 9, and the positive electrode lug 9 is electrically connected with the positive electrode end cover 11 of the battery;
the negative electrode lug 10 is electrically connected with the negative electrode parallel lead 4;
the surface of the farthest isolating part from the battery anode end cover 11 in all isolating parts, which is far away from the negative electrode plate 3 and the positive electrode plate 1, is provided with a negative electrode welding lead piece 12, and the negative electrode lug 10 is electrically connected with the negative electrode welding lead piece 12.
Specifically, the positive tab 9 and the negative tab 10 serve to draw out the electric quantity of the battery cell 002 when the lithium ion battery is discharged. The positive electrode parallel connection lead belt 2 is electrically connected with the positive electrode lug 9, and the positive electrode lug 9 is electrically connected with the positive electrode end cover 11 of the battery; simultaneously, the negative electrode lug 10 is electrically connected with the negative electrode parallel lead 4, the negative electrode lug 10 is electrically connected with the negative electrode welding lead 12, under the condition that an external component forms a loop, the lithium ion battery transmits charges in the battery cell 002 to the external component through the negative electrode parallel lead 4, passes through the negative electrode lug 10, passes through the electric negative electrode welding lead 12, then passes through the battery positive electrode end cover 11, passes through the positive electrode lug 9, and flows back through the positive electrode parallel lead 2 to form a circuit loop.
Optionally, with continued reference to fig. 3, the laminated cylindrical lithium ion battery structure further includes:
and a protective sleeve 13, wherein the protective sleeve 13 wraps the side wall of the battery cell 002 to separate the battery cell 002 from the battery shell 001.
The battery cell 002 is separated from the battery case 001 by the protective sleeve 13, and an insulating effect between the battery cell 002 and the protective case 001 is achieved.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present utility model may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present utility model are achieved, and the present utility model is not limited herein.
The above embodiments do not limit the scope of the present utility model. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included in the scope of the present utility model.
Claims (9)
1. A laminated cylindrical lithium ion battery structure comprising:
the battery comprises a battery cell and a battery shell, wherein the battery cell is vertically arranged in the battery shell;
the battery cell comprises a plurality of positive plates, a positive parallel lead, a plurality of negative plates, a negative parallel lead and a diaphragm;
the positive plates and the negative plates are sequentially and alternately arranged along the height direction of the battery cell; the positive electrode parallel lead and the negative electrode parallel lead extend along the height direction of the battery cell, a plurality of negative electrode plates are electrically connected with the negative electrode parallel lead, and a plurality of positive electrode plates are electrically connected with the positive electrode parallel lead;
along the direction of height of battery electric core, the diaphragm is folded with snakelike bending, and adjacent positive pole piece and negative pole piece are separated by the diaphragm, the negative pole piece with the parallelly connected guide strip of positive pole is separated by the diaphragm, the positive pole piece with the parallelly connected guide strip of negative pole is separated by the diaphragm.
2. The battery structure according to claim 1, wherein:
the diaphragm comprises a first connecting part, a second connecting part and a separation part;
the first connecting part and the second connecting part extend along the height direction of the battery cell, the first connecting part is positioned between the negative electrode plate and the positive electrode parallel connection lead, the second connecting part is positioned between the positive electrode plate and the negative electrode parallel connection lead, the isolating part is positioned between the adjacent positive electrode plate and the negative electrode plate or positioned at one side of the positive electrode plate and the negative electrode plate, and the isolating parts are arranged at two sides of each positive electrode plate and each negative electrode plate;
the two isolation parts on two sides of the negative electrode plate are connected together through a first connection part, and the two isolation parts on two sides of the positive electrode plate are connected together through a second connection part.
3. The battery structure according to claim 2, wherein:
the shapes of the negative plate, the positive plate and the isolation part are all round;
the diameter of the negative electrode plate is larger than that of the positive electrode plate;
the diameter of the isolation part is larger than that of the negative plate.
4. A battery structure according to claim 3, wherein:
the difference between the diameter of the negative plate and the diameter of the positive plate is larger than 1mm, and the difference between the diameter of the isolation part and the diameter of the negative plate is larger than 1mm.
5. The battery structure according to claim 1, wherein:
the thickness of the separator ranges from 1 μm to 50 μm.
6. The battery structure according to claim 1, wherein:
the diaphragm comprises a base film and insulating films positioned on two sides of the base film.
7. The battery structure according to claim 2, wherein:
the first connecting portion is perpendicular to the isolating portion, and the second connecting portion is perpendicular to the isolating portion.
8. The battery structure of claim 2, further comprising:
the battery comprises a positive electrode lug, a negative electrode lug and a battery positive electrode end cover; the battery anode end cover is positioned at one side of the battery shell;
the positive electrode parallel connection lead is electrically connected with a positive electrode lug, and the positive electrode lug is electrically connected with the positive electrode end cover of the battery;
the negative electrode lug is electrically connected with the negative electrode parallel lead;
and the surfaces, away from the negative plate and the positive plate, of the isolating parts, which are farthest from the end cover of the positive electrode of the battery are provided with negative electrode welding guide plates, and negative electrode lugs are electrically connected with the negative electrode welding guide plates.
9. The battery structure of claim 1, further comprising:
and the protective sleeve wraps the side wall of the battery cell to separate the battery cell from the battery shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223308119.4U CN219873642U (en) | 2022-12-09 | 2022-12-09 | Laminated cylindrical lithium ion battery structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223308119.4U CN219873642U (en) | 2022-12-09 | 2022-12-09 | Laminated cylindrical lithium ion battery structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219873642U true CN219873642U (en) | 2023-10-20 |
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ID=88322242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223308119.4U Active CN219873642U (en) | 2022-12-09 | 2022-12-09 | Laminated cylindrical lithium ion battery structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219873642U (en) |
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2022
- 2022-12-09 CN CN202223308119.4U patent/CN219873642U/en active Active
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