CN109461850B - Lithium ion battery cap and lithium ion battery - Google Patents
Lithium ion battery cap and lithium ion battery Download PDFInfo
- Publication number
- CN109461850B CN109461850B CN201811075269.0A CN201811075269A CN109461850B CN 109461850 B CN109461850 B CN 109461850B CN 201811075269 A CN201811075269 A CN 201811075269A CN 109461850 B CN109461850 B CN 109461850B
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- Prior art keywords
- lithium ion
- ion battery
- edge
- extension
- battery cap
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/183—Sealing members
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
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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
Abstract
The invention discloses a lithium ion battery cap and a lithium ion battery, relating to the technical field of lithium batteries, wherein the lithium ion battery cap comprises: a top cover; the edge of the top cover is accommodated in the edge covering structure of the explosion-proof sheet; the sealing ring is coated on the outer edge of the explosion-proof sheet, the lower edge of the sealing ring extends in the direction away from the top cover to form an extending part, and the lower edge of the extending part is provided with a plurality of notches; and the lower cover is welded below the explosion-proof sheet. This lithium ion battery cap extends at the lower limb of sealing washer and forms the extension, with the upper end cladding of electric core utmost point group in the extension to lower limb at the extension sets up a plurality of notches, make the lower edge of sealing washer can closely laminate together with electric core utmost point group, in order to prevent that the lithium cell from leading to the fact the play of electric core utmost point group in the steel casing because violent impact in the use, thereby lead to the fracture of battery utmost point ear and arouse the battery inefficacy.
Description
Technical Field
The invention relates to the technical field of lithium batteries, in particular to a lithium ion battery cap and a lithium ion battery.
Background
Cylindrical lithium ion batteries have been widely used in the fields of electric vehicles, electric tools, small household appliances, and the like because of their advantages of high energy density, low cost, long service life, high safety and reliability, and the like. In some use occasions, the battery can receive external large vibration impact force, and when the battery continuously encounters external vibration impact, the battery cell pole group can be caused to move in the steel shell, so that the bent parts of the positive and negative lugs are broken, and the battery is caused to lose efficacy.
Disclosure of Invention
The invention aims to provide a lithium ion battery cap and a lithium ion battery.
To achieve the above object, in one aspect, an embodiment of the present invention provides a lithium ion battery cap including: a top cover; the edge of the top cover is accommodated in the edge covering structure of the explosion-proof sheet; the sealing ring is coated on the outer edge of the explosion-proof sheet, the lower edge of the sealing ring extends in the direction away from the top cover to form an extending part, and the lower edge of the extending part is provided with a plurality of notches; and the lower cover is welded below the explosion-proof sheet.
Preferably, the cross section of the extension part is of equal thickness, or the outer surface of the extension part is a circular arc surface or an inclined surface; or both the inner and outer surfaces of the extension are beveled.
Preferably, the length of the extension is in the range of 0.5mm to 2.5 mm.
Preferably, the shape of the notch is rectangular, triangular or trapezoidal.
Preferably, the top cover and the explosion-proof sheet are welded together by a plurality of laser welding spots, and the laser welding spots comprise 3 to 10 laser points.
Preferably, the sealing ring comprises a limiting part, a first supporting part and a second supporting part, wherein the limiting part and the first supporting part are perpendicular to each other, the second supporting part is positioned between the first supporting part and the extending part, an included angle between the first supporting part and the second supporting part is larger than 90 degrees and smaller than 180 degrees, and the extending part is parallel to the limiting part; the limiting part is coated on the outer edge of the explosion-proof sheet, and the first supporting part is located below the edge covering structure.
Preferably, the internal surface of spacing portion is provided with spacing arch, and the upper surface of first supporting part is provided with the support arch, and the structure block of borduring is between spacing arch and support arch.
Preferably, the explosion-proof sheet further comprises a bottom plate with a downward-sunken middle part and a connecting part for connecting the edge covering structure and the bottom plate, and the connecting part is perpendicular to the edge covering structure; the lower cover comprises an outer edge part and a lower cover body which is concave downwards; the middle part of the bottom plate is welded with the lower cover body.
Preferably, the lithium ion battery cap further comprises an insulating ring between the outer edge of the lower cover and the edge covering structure and the connecting part of the explosion-proof sheet.
In another aspect, an embodiment of the present invention further provides a lithium ion battery, where the lithium ion battery includes a cell electrode group and any one of the above lithium ion battery caps, and an upper end of the cell electrode group is wrapped in the extension portion.
Through above-mentioned technical scheme, extend at the lower limb of sealing washer and form the extension, with the upper end cladding of electric core utmost point group in the extension to lower limb at the extension sets up a plurality of notches, make the lower edge of sealing washer can closely laminate together with electric core utmost point group, in order to prevent that the lithium cell from leading to the fact the play of electric core utmost point group in the steel casing because violent impact in the use, thereby lead to the fracture of battery utmost point ear and arouse the battery inefficacy.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a top view of a lithium ion battery cap according to an embodiment of the present invention;
fig. 2 is a bottom view of a lithium ion battery cap according to an embodiment of the present invention;
fig. 3 is a cross-sectional view of a lithium ion battery cap according to an embodiment of the present invention, taken along a section in fig. 1;
FIG. 4(a) shows a cross-sectional view of a seal ring according to an embodiment of the present invention taken along a section in FIG. 1;
FIG. 4(b) shows a cross-sectional view of a seal ring according to an embodiment of the present invention taken along a section in FIG. 1;
FIG. 4(c) shows a cross-sectional view of a seal ring according to an embodiment of the present invention, taken along a section in FIG. 1;
FIG. 4(d) shows a cross-sectional view of a seal ring according to an embodiment of the present invention taken along a section in FIG. 1;
fig. 5(a) shows a cross-sectional view of a lithium ion battery cap according to an embodiment of the present invention along a section in fig. 1;
fig. 5(b) shows a cross-sectional view of a lithium ion battery cap according to an embodiment of the present invention, taken along a section in fig. 1; and
fig. 5(c) shows a cross-sectional view of a lithium ion battery cap according to an embodiment of the present invention, taken along a section in fig. 1.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
Fig. 1 is a top view of a lithium ion battery cap according to an embodiment of the present invention, and fig. 2 is a bottom view of the lithium ion battery cap according to an embodiment of the present invention; fig. 3 is a cross-sectional view of a lithium ion battery cap according to an embodiment of the present invention, taken along a section in fig. 1. As shown in fig. 1 to 3, in an embodiment of the present invention, there is provided a lithium ion battery cap, which may include:
a top cover 1;
the edge of the top cover 1 is accommodated in the edge covering structure 21 of the explosion-proof sheet 2;
the sealing ring 3 is coated on the outer edge of the explosion-proof sheet 2, the lower edge of the sealing ring 3 extends in the direction away from the top cover 1 to form an extension part 31, and a plurality of notches 32 are formed in the lower edge of the extension part 31; and
and the lower cover 4 is welded below the explosion-proof sheet 2.
The top cover 1, the explosion-proof sheet 2, the sealing ring 3 and the lower cover 4 can be of a central symmetrical structure and are coaxially arranged.
The top cover 1 and the explosion-proof sheet 2 can be welded together by a plurality of laser welding spots 6, and the laser welding spots 6 can comprise 3 to 10 laser points, for example. The laser welds 6 may be evenly distributed along the edge of the lid 1. The sealing ring 3 can be bonded to the outer edge of the rupture disc 2, for example, by means of a sealant.
In an embodiment of the present invention, the top cover 1 may include:
an outer convex part formed by protruding from the middle part of the top cover 1 to one side far away from the explosion-proof sheet;
and the edge part of the explosion-proof sheet 2 in the edge covering structure 21 is covered.
The edge of the outer convex part of the top cover 1 can be provided with a plurality of air holes 11, and the plurality of air holes 11 can be uniformly distributed at intervals along the edge of the outer convex part. Although the number of the airing holes 11 is shown as 5 in fig. 2, it should be understood by those skilled in the art that the number of the airing holes 11 of the upper cover 1 is not limited to the number shown in fig. 3.
An extension portion 31 is formed at the lower edge of the sealing ring 3, so that the battery cell pole group can be covered in the extension portion 31, and the length of the extension portion 31 can be set to be 0.5mm to 2.5mm, for example.
Fig. 4(a), 4(b), 4(c) and 4(d) respectively show a cross-sectional view of a sealing ring according to an embodiment of the present invention along a certain section in fig. 1, and as shown in fig. 4(a), 4(b), 4(c) and 4(d), in order to improve the fitting degree of the cell pole group and the sealing ring 3, in an embodiment of the present invention, an outer surface of the extension portion 31 may be provided as an arc surface or an inclined surface, or both an inner surface and an outer surface of the extension portion 31 may be provided as an inclined surface. When the cross section of the extension portion 31 has a non-uniform thickness (or the extension portion is subjected to a thinning process), the hardness of the extension portion 31 can be reduced, so that the sealing ring 3 and the cell pole group can be more tightly attached together.
The lower edge of the extension portion 31 is provided with a plurality of notches 32, which can also reduce the hardness of the extension portion 31 and improve the elasticity of the extension portion 31, so that the sealing ring 3 and the battery cell pole group can be more tightly attached together. Fig. 5(a), 5(b), and 5(c) are sectional views of a lithium ion battery cap according to an embodiment of the present invention, taken along a certain section in fig. 1. As shown in fig. 5(a), 5(b) and 5(c), in one embodiment of the present invention, the shape of the notch 32 may be, for example, rectangular, triangular or trapezoidal.
The notches 32 may be evenly distributed along the lower edge of the extension 31, and the number of notches 32 may be, for example, 2, 4, or 6, but is not limited to the above number.
As shown in fig. 3, in an embodiment of the present invention, the sealing ring 3 may include a limiting portion 33 and a first supporting portion 34 perpendicular to each other, and a second supporting portion 35 located between the first supporting portion 34 and the extending portion 31, an included angle between the first supporting portion 34 and the second supporting portion 35 is greater than 90 ° and less than 180 °, and the extending portion 31 is parallel to the limiting portion 33; the limiting part 33 is coated on the outer edge of the explosion-proof sheet 2, and the first supporting part 34 is positioned below the edge covering structure 21.
The inner surface of the position-limiting part 33 may be provided with a position-limiting protrusion 331, the upper surface of the first supporting part 34 may be provided with a supporting protrusion 341, and the binding structure 21 is engaged between the position-limiting protrusion 331 and the supporting protrusion 341. The lower surface of the binding structure 21 abuts on the supporting protrusions 341.
The explosion-proof sheet 2 can also comprise a bottom plate 22 with a downward concave middle part and a connecting part 23 for connecting the edge covering structure 21 and the bottom plate 22, wherein the connecting part 23 is vertical to the edge covering structure 21; the lower cover 4 includes an outer edge portion 41 and a lower cover body 42 recessed downward; the central downward depressed portion of the bottom plate 22 is welded to the lower cover body 42.
In an embodiment of the present invention, the lithium ion battery cap may further include an insulating ring 5 positioned between the outer edge portion 41 of the lower cover 4 and the edge-covering structure 21 and the connection portion 23 of the rupture disk 2.
The sealing ring 3 and the insulating ring 5 may be, for example, hollow annular bodies. The insulating ring 5 may be a centrosymmetric structure and is disposed coaxially with the sealing ring 3.
In an embodiment of the present invention, a lithium ion battery is further provided, where the lithium ion battery may include a battery cell pole group, any one of the above lithium ion battery caps, and a steel casing for covering the battery cell pole group, and an upper end of the battery cell pole group is covered in the extension portion 31.
In order to verify the anti-vibration performance of the lithium ion battery of the above embodiment, the present invention provides the following examples:
example 1
As shown in fig. 4(c) and 5(b), the lithium ion battery cap comprises a top cover, an explosion-proof sheet, a sealing ring, a lower cover and an insulating ring, wherein the top cover and the explosion-proof sheet are welded together through 2 laser welding marks, each laser welding mark comprises 6 laser points, and the laser welding marks are uniformly distributed along the edge of the top cover. The length of extension is 1.5mm, and the surface of extension is through the inclined plane processing of thinning, and the lower limb of extension is provided with 2V notch mouths.
The lithium ion battery cap is used on a 18650 cylindrical lithium ion battery, the lithium ion battery is fully charged after being sealed, the lithium ion battery is kept stand for more than 1 hour, then the lithium ion battery is arranged on a vibration table, and vibration with the amplitude of +/-0.1 mm and the vibration frequency of 250Hz is exerted on a plurality of lithium ion batteries for 8 hours. And measuring the parameters of the lithium ion batteries after the vibration is finished, wherein the voltages of the plurality of lithium ion batteries are all larger than or equal to 4.12V, and the alternating current internal resistance of the lithium ion batteries is increased by 0.8 percent compared with that before the vibration.
As shown in fig. 4(b) and 5(c), the lithium ion battery cap comprises a top cover, an explosion-proof sheet, a sealing ring, a lower cover and an insulating ring, wherein the top cover and the explosion-proof sheet are welded together through 4 laser welding marks, each laser welding mark comprises 5 laser points, and the laser welding marks are uniformly distributed along the edge of the top cover. The length of extension is 1.8mm, and the surface of extension is through the arc surface skiving processing, and the lower limb of extension is provided with 2 trapezoidal notches.
The lithium ion battery cap is used on a 18650 cylindrical lithium ion battery, the lithium ion battery is fully charged after being sealed, the lithium ion battery is kept stand for more than 1 hour, then the lithium ion battery is arranged on a vibration table, and vibration with the amplitude of +/-0.1 mm and the vibration frequency of 250Hz is exerted on a plurality of lithium ion batteries for 8 hours. And measuring the parameters of the lithium ion batteries after the vibration is finished, wherein the voltages of the plurality of lithium ion batteries are all larger than or equal to 4.12V, and the alternating current internal resistance of the lithium ion batteries is increased by 0.5 percent compared with that before the vibration.
As shown in fig. 4(b) and 5(c), the lithium ion battery cap comprises a top cover, an explosion-proof sheet, a sealing ring, a lower cover and an insulating ring, wherein the top cover and the explosion-proof sheet are welded together through 4 laser welding marks, each laser welding mark comprises 5 laser points, and the laser welding marks are uniformly distributed along the edge of the top cover. The length of extension is 1.6mm, and the surface of extension is through the arc surface skiving processing, and the lower limb of extension is provided with 4 trapezoidal notches.
The lithium ion battery cap is used on a 18650 cylindrical lithium ion battery, the lithium ion battery is fully charged after being sealed, the lithium ion battery is kept stand for more than 1 hour, then the lithium ion battery is arranged on a vibration table, and vibration with the amplitude of +/-0.1 mm and the vibration frequency of 250Hz is exerted on a plurality of lithium ion batteries for 8 hours. And measuring the parameters of the lithium ion batteries after the vibration is finished, wherein the voltages of the plurality of lithium ion batteries are all larger than or equal to 4.12V, and the alternating current internal resistance of the lithium ion batteries is increased by 0.6 percent compared with that before the vibration.
Through the above-mentioned embodiment, make electric core utmost point group can be better low cladding in the extension through the length that increases the extension, through doing the skiving to the extension and set up the notch and reduce the hardness of extension at the lower limb of extension, increase the elasticity of extension, make seal ring can closely be laminated with electric core utmost point group together after lithium ion battery seals, in order to prevent that the lithium cell from causing the play of electric core utmost point group in the steel casing because violent impact in the use, thereby lead to the fracture of battery tab and arouse the battery inefficacy, lithium ion battery's anti-vibration performance has been improved.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention. It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (10)
1. A lithium ion battery cap, comprising:
a top cover;
the edge of the top cover is accommodated in the edge covering structure of the explosion-proof sheet;
the sealing ring is coated on the outer edge of the explosion-proof sheet, the lower edge of the sealing ring extends in the direction away from the top cover to form an extending part, a plurality of notches are formed in the lower edge of the extending part, the upper end of the battery cell pole group can be coated in the extending part by the extending part, and the lower edge of the sealing ring can be tightly attached to the battery cell pole group; and
and the lower cover is welded below the explosion-proof sheet.
2. The lithium ion battery cap of claim 1, wherein the cross-section of the extension is of equal thickness, or the outer surface of the extension is a circular arc surface or an inclined surface; or both the inner and outer surfaces of the extension are beveled.
3. The lithium ion battery cap of claim 2, wherein the extension has a length in a range of 0.5mm to 2.5 mm.
4. The lithium ion battery cap of claim 1, wherein the slot is rectangular, triangular, or trapezoidal in shape.
5. The lithium ion battery cap of claim 1, wherein the top cap and the rupture disk are welded together by a plurality of laser welds, the laser welds including 3 to 10 laser spots.
6. The lithium ion battery cap of claim 1, wherein the sealing ring comprises a limiting portion and a first supporting portion that are perpendicular to each other, and a second supporting portion that is located between the first supporting portion and the extending portion, an included angle between the first supporting portion and the second supporting portion is greater than 90 ° and less than 180 °, and the extending portion is parallel to the limiting portion; the limiting part is coated on the outer edge of the explosion-proof sheet, and the first supporting part is located below the edge covering structure.
7. The lithium ion battery cap of claim 6, wherein the inner surface of the limiting portion is provided with a limiting protrusion, the upper surface of the first supporting portion is provided with a supporting protrusion, and the edge covering structure is clamped between the limiting protrusion and the supporting protrusion.
8. The lithium ion battery cap of claim 1, wherein the explosion-proof sheet further comprises a bottom plate with a downward concave middle part and a connecting part connecting the edge-covering structure and the bottom plate, and the connecting part is perpendicular to the edge-covering structure; the lower cover comprises an outer edge part and a lower cover body which is concave downwards; the middle part of the bottom plate is welded with the lower cover body.
9. The lithium ion battery cap of claim 8, further comprising an insulating ring between the outer edge portion of the lower cover and the edge-covering structure and the connection portion of the rupture disk.
10. A lithium ion battery, characterized in that, the lithium ion battery includes a cell pole group and the lithium ion battery cap according to any one of claims 1 to 9, the upper end of the cell pole group is wrapped in the extension portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811075269.0A CN109461850B (en) | 2018-09-14 | 2018-09-14 | Lithium ion battery cap and lithium ion battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811075269.0A CN109461850B (en) | 2018-09-14 | 2018-09-14 | Lithium ion battery cap and lithium ion battery |
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| Publication Number | Publication Date |
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| CN109461850A CN109461850A (en) | 2019-03-12 |
| CN109461850B true CN109461850B (en) | 2021-08-20 |
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| CN201811075269.0A Active CN109461850B (en) | 2018-09-14 | 2018-09-14 | Lithium ion battery cap and lithium ion battery |
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| CN113328213B (en) * | 2021-04-27 | 2023-07-11 | 宁波超霸能源有限公司 | Manufacturing method of cylindrical lithium battery |
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| CN1599091A (en) * | 2003-09-17 | 2005-03-23 | 索尼株式会社 | Battery |
| KR100882916B1 (en) * | 2007-08-27 | 2009-02-10 | 삼성에스디아이 주식회사 | Secondary battery |
| CN201435414Y (en) * | 2009-07-10 | 2010-03-31 | 杨学新 | Anti-explosion combined cover cap of cylindrical battery |
| JP2013140672A (en) * | 2010-03-26 | 2013-07-18 | Hitachi Maxell Energy Ltd | Sealed battery |
| CN104952635A (en) * | 2014-03-28 | 2015-09-30 | 库珀技术公司 | Electrochemical energy storage device with flexible metal contact current collector and methods of manufacture |
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| CN107851772A (en) * | 2015-07-24 | 2018-03-27 | 松下知识产权经营株式会社 | Winding type battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101097255B1 (en) * | 2009-11-30 | 2011-12-21 | 삼성에스디아이 주식회사 | Rechargeable Battery |
| CA2997725C (en) * | 2017-03-10 | 2021-08-03 | Evolution Engineering Inc. | Battery coil engaging members for downhole tools |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1599091A (en) * | 2003-09-17 | 2005-03-23 | 索尼株式会社 | Battery |
| KR100882916B1 (en) * | 2007-08-27 | 2009-02-10 | 삼성에스디아이 주식회사 | Secondary battery |
| CN201435414Y (en) * | 2009-07-10 | 2010-03-31 | 杨学新 | Anti-explosion combined cover cap of cylindrical battery |
| JP2013140672A (en) * | 2010-03-26 | 2013-07-18 | Hitachi Maxell Energy Ltd | Sealed battery |
| CN104952635A (en) * | 2014-03-28 | 2015-09-30 | 库珀技术公司 | Electrochemical energy storage device with flexible metal contact current collector and methods of manufacture |
| CN107851772A (en) * | 2015-07-24 | 2018-03-27 | 松下知识产权经营株式会社 | Winding type battery |
| CN105226209A (en) * | 2015-10-20 | 2016-01-06 | 常州市武进中瑞电子有限公司 | The ultra-thin power combination block of lithium battery |
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| CN109461850A (en) | 2019-03-12 |
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Address after: 226200 No.306 Heping South Road, Huilong Town, Qidong City, Nantong City, Jiangsu Province Patentee after: Jiangsu haisida power supply Co.,Ltd. Address before: 226200 No.306 Heping South Road, Huilong Town, Qidong City, Nantong City, Jiangsu Province Patentee before: JIANGSU HIGHSTAR BATTERY MANUFACTURING Co.,Ltd. |
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