CN212461794U - Novel battery roll core and lithium battery using same - Google Patents
Novel battery roll core and lithium battery using same Download PDFInfo
- Publication number
- CN212461794U CN212461794U CN202021203530.3U CN202021203530U CN212461794U CN 212461794 U CN212461794 U CN 212461794U CN 202021203530 U CN202021203530 U CN 202021203530U CN 212461794 U CN212461794 U CN 212461794U
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- Prior art keywords
- battery
- core
- roll core
- positive
- pole pieces
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Links
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 15
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 14
- 238000004804 winding Methods 0.000 claims abstract description 30
- 229910052751 metal Inorganic materials 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 15
- 235000015110 jellies Nutrition 0.000 claims 1
- 239000008274 jelly Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 238000003466 welding Methods 0.000 description 8
- 239000011888 foil Substances 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 239000011889 copper foil Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000011255 nonaqueous electrolyte Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
Images
Classifications
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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
-
- 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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- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model discloses a novel battery roll core and a lithium battery using the same, relating to the technical field of battery structures; the battery roll core is formed by winding positive and negative pole pieces and a diaphragm between the positive and negative pole pieces and is of a transverse cylindrical structure; one of the positive and negative pole pieces is led out from the end part of the battery roll core to form an upward pole lug; the other pole piece is exposed on the bottom surface of the battery roll core; adopt the technical scheme provided by the utility model current electric core processing is loaded down with trivial details, the technical problem that the yields is low has been solved.
Description
Technical Field
The utility model relates to a battery structure technical field especially relates to a novel battery rolls up core and uses this button cell who rolls up core.
Background
Lithium batteries are batteries using a nonaqueous electrolyte solution and using lithium metal or a lithium alloy as a negative electrode material. Lithium batteries have been widely used because of their advantages of light weight, large capacity, no memory effect, etc., and some micro batteries, such as button batteries, have also appeared in order to be adapted to the existing electronic products.
The conventional manufacturing method of the button cell winding core is mainly two winding core manufacturing modes of a cylindrical winding mode or a lamination mode. The packaging mode is complex in process, high in cost, the working procedures of positive and negative electrode lugs and welding are required to be added, and the space utilization rate of the whole battery cell is not high after the positive and negative electrode lugs are welded to the bottom of the steel shell; the second method for manufacturing the roll core is to punch the positive and negative diaphragms into circles respectively and then package the diaphragms in a cross-overlapping manner respectively.
The present application, therefore, is directed to a novel cell structure to solve at least one of the problems set forth above.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a novel core is rolled up to battery and this lithium cell of rolling up the core is used, adopts the utility model provides a technical scheme has solved current electric core processing loaded down with trivial details, technical problem that the yields is low.
In order to solve the technical problem, the utility model provides a novel battery rolls up core and uses this lithium cell of rolling up core.
In a first aspect, the application provides a novel battery roll core, which is formed by winding positive and negative pole pieces and a diaphragm between the positive and negative pole pieces, and has a transverse cylindrical structure; one of the positive and negative pole pieces is led out from the end part of the battery roll core to form an upward pole lug; the other pole piece is exposed on the bottom surface of the battery roll core.
Preferably, the positions of the battery winding core exposed out of the pole pieces are all coated with battery diaphragms.
In a second aspect, the present application provides a lithium battery using the above battery roll core, which includes a metal shell, and the above battery roll core placed in the metal shell; the electrode lugs of the battery winding core and the bottom surface of the battery winding core are respectively electrically connected with the two end surfaces of the metal shell.
Preferably, the tab is bent along one surface of the diaphragm on the outer side of the battery winding core.
Preferably, the covering width of the diaphragm at the outer side of the battery winding core is larger than the width of the tab.
Preferably, two side edges of the pole piece are insulating layers.
Compared with the prior art, the beneficial effects of the utility model reside in that: the battery cell is horizontally arranged instead of the existing vertically arranged battery cell, and a brand new concept is adopted; the battery roll core adopts a diaphragm and a metal foil for ending, and the circuit conduction can be realized only by welding a lug at one end; the working procedures of tab welding are reduced, the working efficiency is improved, and the production cost is reduced; meanwhile, the internal space of the battery shell can be further compressed by adopting the transversely placed winding core, and the energy density in unit space is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic end view of one embodiment of a battery jellyroll of the present application;
FIG. 2 is a schematic structural view of one embodiment of a button cell of the present application;
fig. 3 is a schematic diagram of a pole piece structure of the present application.
Wherein: 10. a positive plate or a negative plate; 20. a diaphragm; 30. a positive plate or a negative plate; 40. a tab; 50. a metal housing; 51. a positive terminal; 52. a negative terminal; 60. an insulating layer.
Detailed Description
In the following description, numerous implementation details are set forth in order to provide a more thorough understanding of the present invention. It should be understood, however, that these implementation details should not be used to limit the invention. That is, in some embodiments of the invention, details of these implementations are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.
It should be noted that all the directional indicators in the embodiments of the present invention, such as upper, lower, left, right, front and rear … …, are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture as shown in the drawings, and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for description purposes, not specifically referring to the order or sequence, and are not intended to limit the present invention, but only to distinguish the components or operations described in the same technical terms, and are not to be construed as indicating or implying any relative importance or implicit indication of the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
For further understanding of the contents, features and functions of the present invention, the following embodiments will be exemplified in conjunction with the accompanying drawings as follows:
examples
The conventional manufacturing method of the button cell winding core is mainly two winding core manufacturing modes of a cylindrical winding mode or a lamination mode. The packaging mode is complex in process, high in cost, the working procedures of positive and negative electrode lugs and welding are required to be added, and the space utilization rate of the whole battery cell is not high after the positive and negative electrode lugs are welded to the bottom of the steel shell; the second method for manufacturing the roll core is to punch the positive and negative diaphragms into circles respectively and then package the diaphragms in a cross-overlapping manner respectively.
In order to solve the above technical problem, the present embodiment provides the following technical solutions:
referring to fig. 1-2, the present embodiment provides a novel battery roll core, which is formed by winding positive and negative electrode plates and a diaphragm 20 between the positive and negative electrode plates;
specifically, the battery roll core is wound to form a cylindrical structure;
furthermore, the battery winding core is transversely arranged;
specifically, one of the positive and negative electrode plates is led out from the end of the battery roll core to form an upward tab 40, and the other electrode plate is exposed on the bottom surface of the battery roll core.
Specifically, the positions of the battery roll cores exposed out of the pole pieces are all coated with battery diaphragms 20.
In the scheme, different from the conventional battery roll core that the tabs 40 are welded on the positive plate and the negative plate, the scheme only needs to weld the tabs 40 on one of the positive plate and the negative plate, thereby reducing the welding procedures of the tabs 40, reducing the rejection rate and improving the processing efficiency; only adopt the mode of unipolar ear 40, saved a utmost point ear 40, can reduce the internal polarization internal resistance of battery, promote the battery multiplying power, further promote battery performance, the utmost point ear 40 of saving also further reduces the manufacturing cost of battery simultaneously.
Referring to fig. 2, the present application further provides a lithium battery, which includes a metal can 50, and a battery roll core as described above disposed in the metal can 50;
further, the metal case 50 includes a positive terminal 51 and a negative terminal 52.
Specifically, the tab 40 of the battery roll core and the bottom surface of the battery roll core are electrically connected to two end surfaces of the metal shell 50, respectively.
Furthermore, the tab 40 is bent along one surface of the battery winding core, which is the diaphragm 20;
in order to avoid the phenomenon that the tab 40 is bent and then contacts with the surface covered by the pole piece to cause the internal short circuit of the battery, the embodiment provides the following technical scheme:
specifically, the covering width of the diaphragm 20 outside the battery roll core is larger than the width of the tab 40; by adopting the mode, the pole lugs 40 have enough range, the short circuit phenomenon is prevented, and the yield of products is improved.
In the scheme, the pole piece covered on the outer surface of the winding core can adopt a copper foil or an aluminum foil end, and when the pole piece covered on the outer surface of the winding core is a positive pole piece, the aluminum foil end is adopted; when the pole piece covered on the outer surface of the winding core is a negative pole piece, a copper foil is adopted for ending; the copper foil or the aluminum foil has conductivity, and the current conduction can be realized by the contact of the copper foil or the aluminum foil with the metal shell without additionally welding the tab 40.
Further, when the tab 40 is led out from the middle, it may contact with the end face of the rolled core battery, and may contact with multiple pole pieces to cause short circuit, in order to solve the technical problem, the present embodiment provides the following technical solutions:
specifically, two side edges of the pole piece are insulating layers 60; when the pole piece is adopted for winding, two ends of a wound battery cell are in an insulated state, so that the pole lug 40 is not easy to contact with the pole piece on the end face, and the yield of products is improved.
In summary, the present application adopts the winding core structure of the single-pole tab 40, and the whole winding core battery is horizontally disposed in the metal casing 50 by winding and ending the metal foil such as copper foil or aluminum foil, so as to design the lithium battery structure of the single-pole tab 40, and the circuit conduction can be realized only by welding one end tab 40; the working procedures of welding the lugs 40 are reduced, the working efficiency is improved, and the production cost is reduced; meanwhile, the internal space of the battery shell can be further compressed by adopting the transversely placed winding core, and the energy density in unit space is improved.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any form, and all the modifications and equivalents of the technical spirit of the present invention to any simple modifications of the above embodiments belong to the scope of the technical solution of the present invention.
Claims (6)
1. A battery roll core is characterized in that: the battery roll core is formed by winding positive and negative pole pieces and a diaphragm between the positive and negative pole pieces and is of a transverse cylindrical structure; one of the positive and negative pole pieces is led out of the end of the battery roll core to form an upward lug, and the other pole piece is exposed on the bottom surface of the battery roll core.
2. The battery jellyroll of claim 1, wherein: the positions of the battery roll cores exposed out of the pole pieces are all coated with battery diaphragms.
3. A lithium battery, characterized in that: a battery jelly roll according to any one of claims 1-2 comprising a metal can, and disposed transversely within the metal can; the electrode lugs of the battery winding core and the bottom surface of the battery winding core are respectively electrically connected with the two end surfaces of the metal shell.
4. A lithium battery as claimed in claim 3, characterized in that: the pole ear is bent along one surface of the diaphragm at the outer side of the battery winding core.
5. A lithium battery as claimed in claim 4, characterized in that: the covering width of the diaphragm on the outer side of the battery winding core is larger than the width of the tab.
6. A lithium battery as claimed in claim 5, characterized in that: and two side edges of the pole piece are insulating layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021203530.3U CN212461794U (en) | 2020-06-24 | 2020-06-24 | Novel battery roll core and lithium battery using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021203530.3U CN212461794U (en) | 2020-06-24 | 2020-06-24 | Novel battery roll core and lithium battery using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212461794U true CN212461794U (en) | 2021-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021203530.3U Active CN212461794U (en) | 2020-06-24 | 2020-06-24 | Novel battery roll core and lithium battery using same |
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| Country | Link |
|---|---|
| CN (1) | CN212461794U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111640994A (en) * | 2020-06-24 | 2020-09-08 | 惠州市纬世新能源有限公司 | Battery roll core and manufacturing method of lithium battery using same |
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2020
- 2020-06-24 CN CN202021203530.3U patent/CN212461794U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111640994A (en) * | 2020-06-24 | 2020-09-08 | 惠州市纬世新能源有限公司 | Battery roll core and manufacturing method of lithium battery using same |
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