CN215869568U - Mylar insulating sheet of lithium ion battery - Google Patents
Mylar insulating sheet of lithium ion battery Download PDFInfo
- Publication number
- CN215869568U CN215869568U CN202120353719.9U CN202120353719U CN215869568U CN 215869568 U CN215869568 U CN 215869568U CN 202120353719 U CN202120353719 U CN 202120353719U CN 215869568 U CN215869568 U CN 215869568U
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- Prior art keywords
- insulating sheet
- lithium ion
- ion battery
- hot melting
- substrate
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- 229920002799 BoPET Polymers 0.000 title claims abstract description 31
- 239000005041 Mylar™ Substances 0.000 title claims abstract description 31
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 20
- 238000002844 melting Methods 0.000 claims abstract description 34
- 239000000758 substrate Substances 0.000 claims abstract description 32
- 230000008018 melting Effects 0.000 claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000003792 electrolyte Substances 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005253 cladding Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004033 plastic Substances 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
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Abstract
The utility model discloses a Mylar insulating sheet of a lithium ion battery, which comprises a first substrate and a second substrate, wherein the first substrate comprises a first large surface, a first left side surface, a first right side surface and a first bottom surface, the first left side surface and the first right side surface are respectively arranged at the left side and the right side of the first large surface, the first bottom surface is arranged at the bottom edge of the first large surface, a first top edge hot melting part is arranged at the top edge of the first large surface, and a first side edge hot melting part is arranged at the vertex angle of the first left side surface and the first right side surface; the second substrate comprises a second large surface, a second left side surface, a second right side surface and a second bottom surface, the second left side surface and the second right side surface are respectively arranged on the left side and the right side of the second large surface, the second bottom surface is arranged on the bottom side of the second large surface, a second top side hot melting part is arranged at the top side of the second large surface, and a second side edge hot melting part is arranged at the top corner of the second left side surface and the top corner of the second right side surface. The utility model can improve the production efficiency and the production yield.
Description
Technical Field
The utility model belongs to the technical field of lithium ion batteries, and particularly relates to a Mylar insulating sheet of a lithium ion battery.
Background
The Mylar insulating sheet plays a role in preventing a naked electric core entering a shell diaphragm from being scratched by an aluminum shell and insulating the naked electric core from the aluminum shell in the lithium ion battery. However, the existing Mylar insulating sheet is influenced by factors such as the thickness of a core, the matching deviation of the manufacturing process and the like, and the problem that the Mylar flanging is not pulled in place is easily caused, so that the Mylar film and the plastic under the top cover are not melted and fall off; the traditional hot-melt Mylar film is formed by firstly hot-melting one side and then folding the other side of the Mylar film through a flanging mechanism, so that the Mylar film on the last folded side is easily not melted and falls off, and the productivity and the product yield are affected.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to provide the Mylar insulating sheet of the lithium ion battery, which can improve the production efficiency and the production yield.
In order to realize the purpose, the utility model adopts the technical scheme that: a Mylar insulating sheet of a lithium ion battery comprises a first substrate and a second substrate, wherein the first substrate comprises a first large surface, a first left side surface, a first right side surface and a first bottom surface, the first left side surface and the first right side surface are respectively arranged at the left side and the right side of the first large surface, the first bottom surface is arranged at the bottom edge of the first large surface, a first top edge hot melting part is arranged at the top edge of the first large surface, and a first side edge hot melting part is arranged at the vertex angle of the first left side surface and the vertex angle of the first right side surface; the second substrate comprises a second large surface, a second left side surface, a second right side surface and a second bottom surface, the second left side surface and the second right side surface are respectively arranged on the left side and the right side of the second large surface, the second bottom surface is arranged on the bottom side of the second large surface, a second top side hot melting part is arranged at the top side of the second large surface, and a second side edge hot melting part is arranged at the top corner of the second left side surface and the top corner of the second right side surface.
Further, through holes are formed in the first bottom surface and the second bottom surface. The electrolyte circulation is convenient.
Furthermore, a plurality of through holes are arranged on the first bottom surface and the second bottom surface, and each through hole is uniformly arranged. The electrolyte can be conveniently and uniformly circulated.
Furthermore, the first bottom surface and the second bottom surface are consistent in size and consistent in size with the bottom of the battery cell to be wrapped. And the bottom flatness is ensured.
Furthermore, the through holes on the first bottom surface and the through holes on the second bottom surface are consistent in distribution position and correspond to each other after being overlapped. The electrolyte circulation effect is improved.
Furthermore, a plurality of first top edge hot melting parts are arranged at the top edge of the first large surface and correspond to the connecting positions of the top cover; and a plurality of second top edge hot melting parts are arranged at the top edge of the second large surface and correspond to the connecting positions of the top cover.
Further, the sum of the first left side surface and the second right side surface is greater than or equal to the size of the cell side wall, and the sum of the second left side surface and the first right side surface is greater than or equal to the size of the cell side wall. The battery cell side wall is completely wrapped and simultaneously hot melting fixation is facilitated.
Further, the width of the first left side surface and the first right side surface is greater than the width of the second left side surface and the second right side surface. Improve the cladding effect, and can not influence the electricity core and go into the shell.
The beneficial effects of the technical scheme are as follows:
according to the utility model, the insulating sheet is decomposed to be designed into the first substrate and the second substrate, and the first substrate and the second substrate are correspondingly structurally designed, so that the steps of traditional Mylar film wrapping can be effectively reduced, and the production efficiency is improved; the problems that the Mylar is affected by the thickness of the naked battery cell to cause hot melting and dropping, the Mylar flanging is not drawn in place and the like can be effectively avoided, and the production yield is improved; the Mylar insulating sheet can be guaranteed not to drop on naked electric core, prevent that naked electric core from going into shell diaphragm by the aluminum hull scratch and insulating with the aluminum hull, guarantee the guard action of Mylar to electric core.
Drawings
FIG. 1 is a schematic structural diagram of a Mylar insulating sheet of a lithium ion battery of the present invention;
FIG. 2 is a schematic view of the structure of a first substrate in an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a second substrate in an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a lithium ion battery according to an embodiment of the present invention before a Mylar insulating sheet wraps a battery core;
fig. 5 is a schematic structural diagram of a lithium ion battery in an embodiment of the present invention after a Mylar insulating sheet wraps a battery core;
wherein 1 is a first substrate, 11 is a first major surface, 12 is a first left side surface, 13 is a first right side surface, 14 is a first bottom surface, 15 is a first top edge heat-fused portion, and 16 is a first side edge heat-fused portion; 2 is a second substrate, 21 is a second major face, 22 is a second left face, 23 is a second right face, 24 is a second bottom face, 25 is a second top edge fuse, 26 is a second side edge fuse; 3 is a through hole, 4 is a battery core, 5 is a top cover, and 6 is an insulating tape.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention is further described below with reference to the accompanying drawings.
In this embodiment, referring to fig. 1 to 5, a Mylar insulating sheet for a lithium ion battery includes a first substrate 1 and a second substrate 2, where the first substrate 1 includes a first large surface 11, a first left side surface 12, a first right side surface 13, and a first bottom surface 14, the first left side surface 12 and the first right side surface 13 are respectively disposed on the left and right sides of the first large surface 11, the first bottom surface 14 is disposed on the bottom side of the first large surface 11, a first top side heat-melting portion 15 is disposed at the top side of the first large surface 11, and a first side heat-melting portion 16 is disposed at the top corner of the first left side surface 12 and the first right side surface 13; the second substrate 2 comprises a second large surface 21, a second left side surface 22, a second right side surface 23 and a second bottom surface 24, the second left side surface 22 and the second right side surface 23 are respectively arranged at the left side and the right side of the second large surface 21, the second bottom surface 24 is arranged at the bottom side of the second large surface 21, a second top side hot melting part 25 is arranged at the top side of the second large surface 21, and a second side hot melting part 26 is arranged at the top corner of the second left side surface 22 and the second right side surface 23.
As a preferable mode 1 of the above embodiment, the through-holes 3 are provided on the first bottom surface 14 and the second bottom surface 24. The electrolyte circulation is convenient.
Preferably, a plurality of through holes 3 are formed on the first bottom surface 14 and the second bottom surface 24, and each through hole 3 is uniformly arranged. The electrolyte can be conveniently and uniformly circulated.
As an optimization scheme 2 of the above embodiment, the first bottom surface 14 and the second bottom surface 24 have the same size, and are the same size as the bottom of the battery cell 4 to be wrapped. And the bottom flatness is ensured.
Preferably, the through holes 3 on the first bottom surface 14 and the through holes 3 on the second bottom surface 24 are distributed at the same position, and after being overlapped, the through holes 3 and the through holes 3 correspond to each other. The electrolyte circulation effect is improved.
As an optimization 3 of the above embodiment, a plurality of first top edge heat-melting parts 15 are arranged at the top edge of the first large surface 11, and the plurality of first top edge heat-melting parts 15 correspond to the connecting positions of the top cover 5; a plurality of second top edge hot melting parts 25 are arranged at the top edge of the second large surface 21, and the plurality of second top edge hot melting parts 25 correspond to the connecting positions of the top cover 5.
As an optimized solution 4 of the above embodiment, the sum of the first left side surface 12 and the second right side surface 23 is greater than or equal to the size of the side wall of the battery cell 4, and the sum of the second left side surface 22 and the first right side surface 13 is greater than or equal to the size of the side wall of the battery cell 4. The side wall of the battery cell 4 is completely wrapped and simultaneously the hot melting fixation is convenient.
Preferably, the width of the first left side surface 12 and the first right side surface 13 is greater than the width of the second left side surface 22 and the second right side surface 23. Improve the cladding effect, and can not influence the electricity core 4 and go into the shell.
For a better understanding of the present invention, the following is a complete description of the working principle of the present invention:
respectively attaching a first substrate 1 and a second substrate 2 on the front surface and the back surface of a naked battery cell 4, and connecting the first substrate 1 and the second substrate 2 with a top cover 5 in a hot melting way by arranging a first top edge hot melting part 15 at the top edge of a first large surface 11 and arranging a second top edge hot melting part 25 at the top edge of a second large surface 21;
folding the first left side surface 12 and the first right side surface 13 of the first substrate 1, folding the second left side surface 22 and the second right side surface 23 of the second substrate 2, and respectively performing hot melting connection on the corresponding first side hot melting part 16 and the corresponding second side hot melting part 26 after the folding edges are butted;
the first bottom surface 14 of the first substrate 1 is folded, the second bottom surface 24 of the second substrate 2 is folded, so that the first bottom surface 14 and the second bottom surface 24 can be connected through the insulating adhesive tape 6 after being correspondingly overlapped, and the Mylar insulating sheet is prevented from being spread.
The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (8)
1. The Mylar insulating sheet of the lithium ion battery is characterized by comprising a first substrate (1) and a second substrate (2), wherein the first substrate (1) comprises a first large surface (11), a first left side surface (12), a first right side surface (13) and a first bottom surface (14), the first left side surface (12) and the first right side surface (13) are respectively arranged on the left side and the right side of the first large surface (11), the first bottom surface (14) is arranged on the bottom edge of the first large surface (11), a first hot melting part (15) is arranged on the top edge of the first large surface (11), and a first side hot melting part (16) is arranged on the vertex angle of the first left side surface (12) and the vertex angle of the first right side surface (13); the second substrate (2) comprises a second large surface (21), a second left side surface (22), a second right side surface (23) and a second bottom surface (24), the second left side surface (22) and the second right side surface (23) are respectively arranged on the left side and the right side of the second large surface (21), the second bottom surface (24) is arranged on the bottom side of the second large surface (21), a second top side hot melting part (25) is arranged on the top side of the second large surface (21), and a second side hot melting part (26) is arranged on the top angle of the second left side surface (22) and the top angle of the second right side surface (23).
2. Mylar insulating sheet for a lithium ion battery according to claim 1, wherein through holes (3) are provided in the first (14) and second (24) bottom surfaces.
3. The Mylar insulating sheet of a lithium ion battery of claim 2, wherein a plurality of through holes (3) are formed in the first bottom surface (14) and the second bottom surface (24), each through hole (3) being uniformly arranged.
4. The Mylar insulating sheet of a lithium ion battery of claim 3, wherein the first bottom surface (14) and the second bottom surface (24) are of the same size and are of the same size as the bottom of the cell (4) to be wrapped.
5. The Mylar insulating sheet of a lithium ion battery according to claim 4, wherein the through holes (3) on the first bottom surface (14) and the through holes (3) on the second bottom surface (24) are distributed in the same position and correspond to each other after being overlapped.
6. The Mylar insulating sheet of a lithium ion battery according to claim 1, wherein a plurality of first top side heat-fusible portions (15) are provided at the top side of the first large face (11), and the plurality of first top side heat-fusible portions (15) correspond to the connection positions of the top cover (5); a plurality of second top edge hot melting parts (25) are arranged at the top edge of the second large surface (21), and the connecting positions of the second top edge hot melting parts (25) and the top cover (5) correspond.
7. The Mylar insulating sheet of a lithium ion battery of claim 1, wherein the sum of the first left side (12) and the second right side (23) is greater than or equal to the size of the cell (4) side wall, and the sum of the second left side (22) and the first right side (13) is greater than or equal to the size of the cell (4) side wall.
8. Mylar insulating sheet for a lithium ion battery according to claim 1 or 7, wherein the width of the first left side (12) and the first right side (13) is larger than the width of the second left side (22) and the second right side (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120353719.9U CN215869568U (en) | 2021-02-08 | 2021-02-08 | Mylar insulating sheet of lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120353719.9U CN215869568U (en) | 2021-02-08 | 2021-02-08 | Mylar insulating sheet of lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215869568U true CN215869568U (en) | 2022-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120353719.9U Active CN215869568U (en) | 2021-02-08 | 2021-02-08 | Mylar insulating sheet of lithium ion battery |
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| Country | Link |
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| CN (1) | CN215869568U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115513564A (en) * | 2022-11-07 | 2022-12-23 | 江苏哲华精密制造有限公司 | A special Mylar sheet for easy energy storage battery with high thermal conductivity |
-
2021
- 2021-02-08 CN CN202120353719.9U patent/CN215869568U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115513564A (en) * | 2022-11-07 | 2022-12-23 | 江苏哲华精密制造有限公司 | A special Mylar sheet for easy energy storage battery with high thermal conductivity |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 361100 201-1, complex building 5, No. 11, Butang Middle Road, torch high tech Zone (Tongxiang) industrial base, Xiamen, Fujian Province Patentee after: Xiamen Haichen Energy Storage Technology Co.,Ltd. Address before: 361000 201-1, complex building 5, No. 11, Butang Middle Road, torch high tech Zone (Tongxiang) industrial base, Xiamen, Fujian Patentee before: Xiamen Haichen New Energy Technology Co.,Ltd. |