CN211957698U - High-infiltration high-capacity lithium ion battery - Google Patents
High-infiltration high-capacity lithium ion battery Download PDFInfo
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- CN211957698U CN211957698U CN202020551028.5U CN202020551028U CN211957698U CN 211957698 U CN211957698 U CN 211957698U CN 202020551028 U CN202020551028 U CN 202020551028U CN 211957698 U CN211957698 U CN 211957698U
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- infiltration
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- pole piece
- lithium ion
- ion battery
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- 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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- 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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Abstract
The utility model provides a high-infiltration high-capacity lithium ion battery, which comprises a shell, wherein an electric core is arranged in the shell, the electric core comprises a first pole piece, a first diaphragm, a second pole piece and a third diaphragm which are sequentially stacked and wound, and a sealing adhesive tape is wound outside the electric core; the first pole piece is connected with a first electrode, the second pole piece is connected with a second electrode, one ends, far away from the battery core, of the first electrode and the second electrode protrude out of the shell, a plurality of first liquid storage through holes are formed in the second diaphragm, a plurality of infiltration notches are formed in the periphery of the second diaphragm, and the infiltration notches surround the first liquid storage through holes. The utility model discloses can provide reliable infiltration structure of stepping down for electrolyte gets into electric core when infiltrating, can effectively improve the infiltration efficiency of infiltrating man-hour, save infiltration time, in addition, the first stock solution through-hole that sets up in the second diaphragm can effectively improve the storage capacity of electrolyte to can ensure that lithium ion battery's electric capacity is enough big, long cycle life.
Description
Technical Field
The utility model relates to a lithium ion battery specifically discloses a high capacity lithium ion battery who soaks.
Background
The lithium ion battery mainly works by moving lithium electrons between the anode and the cathode, and has the advantages of high energy density, high average output voltage, small self-discharge, no memory effect and high charging and discharging efficiency.
In the prior art, after a lithium ion battery is packaged, electrolyte needs to be injected, in the electrolyte injection process, the electrolyte needs to fully infiltrate into a battery cell and gradually infiltrate into the space between each pole piece and each diaphragm, and because the battery cell is of a high-density structure formed by winding and winding the pole pieces and the diaphragms in a laminated manner, the electrolyte infiltration needs a longer time, the sufficient infiltration can be obtained in a longer time, and the infiltration efficiency is low.
SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide a high-infiltration high-capacity lithium ion battery with a good infiltration abdication structure for solving the problems in the prior art, which can effectively improve the infiltration efficiency during infiltration processing, and has a large capacitance of the whole structure.
In order to solve the prior art problem, the utility model discloses a high-infiltration large-capacity lithium ion battery, which comprises a shell, wherein an electric core is arranged in the shell, the electric core comprises a first pole piece, a first diaphragm, a second pole piece and a third diaphragm which are sequentially stacked and wound, and a sealing adhesive tape is wound outside the electric core;
the first pole piece is connected with a first electrode, the second pole piece is connected with a second electrode, one ends, far away from the battery core, of the first electrode and the second electrode protrude out of the shell, a plurality of first liquid storage through holes are formed in the second diaphragm, a plurality of infiltration notches are formed in the periphery of the second diaphragm, and the infiltration notches surround the first liquid storage through holes.
Furthermore, the thickness of the first diaphragm and the thickness of the second diaphragm are both 15-20 microns.
Furthermore, a plurality of permeation through holes are arranged in the sealing adhesive tape.
Furthermore, a gasket paper sheet is arranged between the bottom of the battery cell and the shell.
Further, the gasket paper sheet is electrolytic paper.
Furthermore, a plurality of second liquid storage through holes are formed in the gasket paper sheet.
The utility model has the advantages that: the utility model discloses a high capacity lithium ion battery who soaks, be provided with special infiltration breach structure, can get into electric core for electrolyte when soaking and provide reliable infiltration abdication structure, can effectively improve the infiltration efficiency of infiltrating man-hour, save infiltration time, and lithium ion battery can not therefore increase the probability of taking place the short circuit, lithium ion battery's charge-discharge performance and life are guaranteed, in addition, the storage capacity of electrolyte can effectively be improved to the first stock solution through-hole that sets up in the second diaphragm, thereby can ensure that lithium ion battery's electric capacity is enough big, long cycle life.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is the structure schematic that well electric core expandes of the utility model discloses.
Fig. 3 is the structure diagram of the middle cell and the sealing tape of the present invention.
The reference signs are: the battery comprises a shell 10, a battery cell 20, a first pole piece 21, a first electrode 211, a first diaphragm 22, a second diaphragm 23, a first liquid storage through hole 231, a wetting notch 232, a second pole piece 24, a second electrode 241, a third diaphragm 25, a sealing tape 30, a permeation through hole 31, a gasket paper 40 and a second liquid storage through hole 41.
Detailed Description
For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.
Refer to fig. 1 to 3.
The embodiment of the utility model discloses high-capacity lithium ion battery of infiltrating, including shell 10, preferably, shell 10 is the plastic-aluminum membrane casing, be equipped with electric core 20 in the shell 10, electric core 20 is including the first pole piece 21, first diaphragm 22, second diaphragm 23, second pole piece 24 and the third diaphragm 25 that stack up in proper order and roll up, preferably, the length and width of first diaphragm 22, second diaphragm 23 and third diaphragm 25 are equallyd divide and are A and B respectively, the length and width of first pole piece 21 and second pole piece 24 are equallyd divide and are a and B respectively, A > a, B > B, effectively avoid taking place the short circuit between first pole piece 21 and the second pole piece 24, electric core 20 is outer to be rolled up sealing tape 30, sealing tape 30 can stabilize the structure of electric core 20, avoid electric core 20 not have the location and scatter, first pole piece 21 is positive plate or negative pole piece, second pole piece 24 is the pole piece of another polarity then;
the first pole piece 21 is connected with a first electrode 211 in a welding manner, the second pole piece 24 is connected with a second electrode 241 in a welding manner, one ends of the first electrode 211 and the second electrode 241, which are far away from the battery cell 20, all protrude out of the shell 10, a plurality of first liquid storage through holes 231 are arranged in the second diaphragm 23, a plurality of infiltration notches 232 are arranged at the edges of the periphery of the second diaphragm 23, and the infiltration notches 232 surround the first liquid storage through holes 231.
The lithium ion battery of the utility model is provided with the infiltration notch 232 for accelerating the infiltration of the electrolyte into the battery cell 20 on the second diaphragm 23, namely, the battery cell 20 is provided with an inlet for injecting the electrolyte, so that the time required for infiltration can be effectively shortened, and the first liquid storage through hole 231 can store a certain amount of electrolyte, thereby effectively improving the charge and discharge performance, capacity and service life of the battery cell 20; in addition, the double-layer diaphragm structure is provided, and in the case that the second diaphragm 23 is provided with a through hole, a notch, and the like, the first diaphragm 22 is still used for ensuring that no short circuit occurs between the first pole piece 21 and the second pole piece 24, and the overall performance of the battery cell 20 is not affected.
In this embodiment, the thicknesses of the first diaphragm 22 and the second diaphragm 23 are both 15 to 20 μm, and the size of the battery cell 20 is effectively controlled by reducing the thickness of the single-layer diaphragm, so that the battery cell 20 is prevented from being excessively influenced by design and use, and the stability of the electronic insulation property and the puncture resistance of the single-layer diaphragm can be ensured.
In this embodiment, the sealing tape 30 is provided with a plurality of permeation through holes 31, so that the structure of the battery cell 20 can be stabilized by the sealing tape 30, the infiltration efficiency of the electrolyte on the battery cell 20 is further improved, and the blocking effect of the sealing tape 30 on the electrolyte is reduced.
In this embodiment, a gasket paper 40 is disposed between the bottom of the battery cell 20 and the housing 10, and the gasket paper 40 can effectively prevent the battery cell 20 from directly contacting the bottom of the housing 10, thereby preventing the housing 10 from causing short circuit and other influences on the battery cell 20.
Based on the above embodiment, the paper gasket sheet 40 is an electrolytic paper, which is an insulating paper, is as thin as a cicada wing, has good air permeability, electrolyte absorption performance and chemical purity, and can effectively adsorb electrolyte, thereby improving the stability of the electrolyte in the lithium ion battery.
In this embodiment, the plurality of second liquid storage through holes 41 are formed in the paper backing sheet 40, and the storage capacity of the paper backing sheet 40 for the electrolyte can be further improved through the second liquid storage through holes 41, so that the capacity of the lithium ion battery is further improved.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (6)
1. The high-infiltration high-capacity lithium ion battery is characterized by comprising a shell (10), wherein a battery cell (20) is arranged in the shell (10), the battery cell (20) comprises a first pole piece (21), a first diaphragm (22), a second diaphragm (23), a second pole piece (24) and a third diaphragm (25) which are sequentially stacked and wound, and a sealing adhesive tape (30) is wound outside the battery cell (20);
first pole piece (21) are connected with first electrode (211), second pole piece (24) are connected with second electrode (241), first electrode (211) with second electrode (241) are kept away from the one end of electric core (20) all bulge in outside shell (10), be equipped with a plurality of first stock solution through-holes (231) in second diaphragm (23), the edge all around of second diaphragm (23) is equipped with a plurality of infiltration breach (232), it centers on around first stock solution through-hole (231) to infiltrate breach (232).
2. The high-infiltration high-capacity lithium ion battery according to claim 1, wherein the thickness of the first separator (22) and the thickness of the second separator (23) are both 15-20 μm.
3. The high-infiltration high-capacity lithium ion battery according to claim 1, wherein the sealing tape (30) is provided with a plurality of permeation through holes (31).
4. The high-infiltration high-capacity lithium ion battery according to claim 1, characterized in that a gasket paper sheet (40) is arranged between the bottom of the battery core (20) and the shell (10).
5. The high-capacity impregnated lithium ion battery according to claim 4, wherein the gasket paper sheet (40) is electrolytic paper.
6. The high-infiltration high-capacity lithium ion battery as claimed in claim 4 or 5, wherein a plurality of second liquid storage through holes (41) are arranged in the gasket paper (40).
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CN202020551028.5U CN211957698U (en) | 2020-04-14 | 2020-04-14 | High-infiltration high-capacity lithium ion battery |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112803081A (en) * | 2021-04-14 | 2021-05-14 | 江苏时代新能源科技有限公司 | Battery monomer, preparation method thereof, battery and power utilization device |
WO2022213305A1 (en) * | 2021-04-07 | 2022-10-13 | 江苏时代新能源科技有限公司 | Electrode assembly, battery cell, battery, and method and device for manufacturing electrode assembly |
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2020
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022213305A1 (en) * | 2021-04-07 | 2022-10-13 | 江苏时代新能源科技有限公司 | Electrode assembly, battery cell, battery, and method and device for manufacturing electrode assembly |
CN112803081A (en) * | 2021-04-14 | 2021-05-14 | 江苏时代新能源科技有限公司 | Battery monomer, preparation method thereof, battery and power utilization device |
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