CN213989009U - Square lithium battery Mylar film and lithium battery - Google Patents
Square lithium battery Mylar film and lithium battery Download PDFInfo
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- CN213989009U CN213989009U CN202022930011.3U CN202022930011U CN213989009U CN 213989009 U CN213989009 U CN 213989009U CN 202022930011 U CN202022930011 U CN 202022930011U CN 213989009 U CN213989009 U CN 213989009U
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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 square lithium cell Mylar membrane and lithium cell, wherein Mylar membrane includes the upper film and lower membrane, the upper film includes top surface cladding piece, the both sides of top surface cladding piece are equipped with big face cladding piece respectively, and every both sides of going up big face cladding piece are equipped with side cladding piece respectively, the membrane includes bottom surface cladding piece down, the both sides of bottom surface cladding piece are equipped with big face cladding piece down respectively, and every both sides of big face cladding piece are equipped with downside cladding piece respectively down, go up the membrane and overlap and be glued together partially at the middle part position department of the big face of electric core and side behind the membrane cladding electricity core down. The utility model provides a Mylar membrane can realize wrapping up in the protection entirely to electric core, has improved the short circuit risk that current hot melt bonding Mylar membrane drops the utmost point ear that causes and the contact of aluminum hull, has saved down plastic and Mylar membrane hot melt bonding process simultaneously, has avoided the hot melt in-process to the damage of diaphragm, has promoted goodness and production efficiency.
Description
Technical Field
The utility model relates to a lithium cell technical field, concretely relates to square lithium cell Mylar membrane and lithium cell.
Background
Lithium batteries are used as power sources of new energy automobiles, and lithium battery technology is rapidly developed in recent years. At present, a square battery is the most common lithium ion battery structure. In the manufacturing process of the square lithium battery, after the battery core is manufactured, the battery core needs to be arranged in a hard square aluminum shell to complete assembly. There is a risk of scratching the cell due to the aluminum casing being harder. Therefore, before the battery cell is installed in the aluminum casing, the battery cell needs to be covered by a flexible Mylar film to prevent the aluminum casing from damaging the battery cell.
At present, the battery core is wrapped by the full-plane Mylar film for the square aluminum-shell battery from the bottom to the top, and the Mylar film structure is mostly as mentioned in Chinese utility model patent CN 209418561U. The Mylar film and the lower plastic are two separated structures, the lower plastic is arranged on the top cover in advance before the electrical core is in flexible connection with the top cover, then the electrical core is coated on the bottom surface, the large surface and the side surface of the electrical core by the Mylar film after the flexible connection welding of the electrical core and the top cover is completed, the upper part of the coated Mylar film is in hot-melt adhesion with the lower plastic, and then the electrical core is arranged in an aluminum shell.
The Mylar film which is in hot-melt bonding with the lower plastic may fall off, which can cause the risk of the contact between the battery core and the aluminum shell after the tab is folded, and seriously affects the safety of the battery; meanwhile, in the hot-melt bonding process, the hot-melt head may touch the diaphragm to cause damage to the diaphragm, and implementation difficulty is brought to the hot-melt bonding process.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at: aiming at the defects of a Mylar film and a plastic hot-melt bonding process under a top cover in the prior art, the Mylar film and the lithium battery of the square lithium battery are provided.
In order to realize the purpose, the utility model discloses a technical scheme be:
the utility model provides a square lithium cell Mylar membrane, is including the last membrane that is used for cladding electric core upper portion and the lower membrane that is used for cladding electric core lower part, it includes the top surface cladding piece to go up the membrane, the both sides of top surface cladding piece are equipped with big face cladding piece respectively, and the both sides of every big face cladding piece are equipped with the side of going up respectively and cover the piece, the membrane includes bottom surface cladding piece down, the both sides of bottom surface cladding piece are equipped with big face cladding piece down respectively, and the both sides of every big face cladding piece are equipped with downside cladding piece down respectively, go up the membrane and cover the middle part position department of electric core big face and side partially overlap and be glued together with lower membrane cladding electric core back.
The utility model divides the Mylar film into an upper film and a lower film, wherein the upper film comprises a top surface coating sheet, two sides of the top surface coating sheet are respectively provided with an upper large surface coating sheet, two sides of each upper large surface coating sheet are respectively provided with an upper side surface coating sheet, the lower film comprises a bottom surface coating sheet, two sides of the bottom surface coating sheet are respectively provided with a lower large surface coating sheet, two sides of each lower large surface coating sheet are respectively provided with a lower side surface coating sheet, and the upper film and the lower film coat the electric core and are partially overlapped and glued together at the middle position of the large surface and the side surface of the electric core, thereby realizing the full coating protection of the electric core, improving the short circuit risk of the contact between the lug and the aluminum shell caused by the falling off of the Mylar film by hot melt bonding in the prior art, simultaneously saving the working procedure of hot melt bonding of lower plastic and the Mylar film, avoiding the damage to the diaphragm in the hot melt process, improving the goodness and the production efficiency, because the Mylar film is of the structure, the upper film can be made of a thinner material, and the energy density of the battery can be improved.
As the utility model discloses a preferred scheme, set up on the top surface cladding piece with the top cap on the explosion-proof valve, annotate liquid mouth and utmost point post corresponding explosion-proof through-hole, annotate liquid through-hole and utmost point post through-hole. Through setting up explosion-proof through-hole, annotating liquid through-hole and utmost point post through-hole, wherein explosion-proof through-hole is used for dodging the explosion-proof valve region on the top cap, annotates the liquid through-hole and is used for dodging the top cap and annotates the liquid mouth region, and utmost point post through-hole is used for dodging top cap utmost point post.
As the preferred scheme of the utility model, a plurality of siphon hole has evenly been seted up on the bottom surface cladding piece, and the electrolyte of being convenient for gets into electric core by siphon hole.
As the utility model discloses an optimal scheme, go up behind membrane and the lower membrane cladding electricity core and bond with the insulating cement in the middle part position department of the big face of electricity core and side, need not to carry out the hot melt and bond, the installation of membrane and lower membrane is gone up to the convenience.
As the preferred scheme of the utility model, go up membrane and/or lower membrane and be one or two kinds in PI membrane, PET membrane, PP membrane, the PVC membrane.
As the preferable scheme of the utility model, the upper film and/or the lower film is one or two of a PI film and a PET film.
A lithium battery comprises the Mylar film of the square lithium battery.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
the utility model divides the Mylar film into an upper film and a lower film, wherein the upper film comprises a top surface coating sheet, two sides of the top surface coating sheet are respectively provided with an upper large surface coating sheet, two sides of each upper large surface coating sheet are respectively provided with an upper side surface coating sheet, the lower film comprises a bottom surface coating sheet, two sides of the bottom surface coating sheet are respectively provided with a lower large surface coating sheet, two sides of each lower large surface coating sheet are respectively provided with a lower side surface coating sheet, and the upper film and the lower film coat the electric core and are partially overlapped and glued together at the middle position of the large surface and the side surface of the electric core, thereby realizing the full coating protection of the electric core, improving the short circuit risk of the contact between the lug and the aluminum shell caused by the falling off of the Mylar film by hot melt bonding in the prior art, simultaneously saving the working procedure of hot melt bonding of lower plastic and the Mylar film, avoiding the damage to the diaphragm in the hot melt process, improving the goodness and the production efficiency, because the Mylar film is of the, the upper film can be made of a thinner material, and the energy density of the battery can be improved.
Drawings
Fig. 1 is a schematic diagram of a Mylar film of a square lithium battery of the present invention.
Fig. 2 is a developed view of the upper membrane of the present invention.
Fig. 3 is a developed view of the lower membrane of the present invention.
The labels in the figure are: 1-upper film, 11-top surface coating sheet, 111-explosion-proof through hole, 112-liquid injection through hole, 113-pole through hole, 12-upper large surface coating sheet, 13-upper side surface coating sheet, 2-lower film, 21-bottom surface coating sheet, 211-siphon hole, 22-lower large surface coating sheet and 23-lower side surface coating sheet.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Example 1
The embodiment provides a square lithium battery Mylar film;
as shown in fig. 1 to 3, the square lithium battery Mylar film in this embodiment includes an upper film 1 for covering an upper portion of a battery core and a lower film 2 for covering a lower portion of the battery core, where the upper film 1 includes a top surface coating sheet 11, two sides of the top surface coating sheet 11 are respectively provided with an upper large surface coating sheet 12, two sides of each upper large surface coating sheet 12 are respectively provided with an upper side surface coating sheet 13, the lower film 2 includes a bottom surface coating sheet 21, two sides of the bottom surface coating sheet 21 are respectively provided with a lower large surface coating sheet 22, two sides of each lower large surface coating sheet 22 are respectively provided with a lower side surface coating sheet 23, and the upper film 1 and the lower film 2 are partially overlapped and glued together at a middle position of a large surface and a side surface of the battery core after the battery core is covered by the upper film 1 and the lower film 2.
The utility model divides the Mylar film into an upper film and a lower film, wherein the upper film comprises a top surface coating sheet, two sides of the top surface coating sheet are respectively provided with an upper large surface coating sheet, two sides of each upper large surface coating sheet are respectively provided with an upper side surface coating sheet, the lower film comprises a bottom surface coating sheet, two sides of the bottom surface coating sheet are respectively provided with a lower large surface coating sheet, two sides of each lower large surface coating sheet are respectively provided with a lower side surface coating sheet, and the upper film and the lower film coat the electric core and are partially overlapped and glued together at the middle position of the large surface and the side surface of the electric core, thereby realizing the full coating protection of the electric core, improving the short circuit risk of the contact between the lug and the aluminum shell caused by the falling off of the Mylar film by hot melt bonding in the prior art, simultaneously saving the working procedure of hot melt bonding of lower plastic and the Mylar film, avoiding the damage to the diaphragm in the hot melt process, improving the goodness and the production efficiency, because the Mylar film is of the structure, the upper film can be made of a thinner material, and the energy density of the battery can be improved.
It should be noted that the top cover sheet 11 is used for covering the top surface of the battery cell, the upper large-surface cover sheet 12 is used for covering the upper parts of the two large surfaces of the battery cell, the upper side cover sheet 13 is used for covering the upper parts of the two side surfaces of the battery cell, and the two upper side cover sheets 13 on the same side of the battery cell are partially overlapped and glued together. The bottom surface coating sheet 21 is used for coating the bottom surface of the battery cell, the lower large surface coating sheet 22 is used for coating the lower parts of the two large surfaces of the battery cell, the lower side surface coating sheet 23 is used for coating the lower parts of the two side surfaces of the battery cell, and the two lower side surface coating sheets 23 positioned on the same side of the battery cell are partially overlapped and glued together.
In this embodiment, the top cover sheet 11 is provided with an explosion-proof valve, an explosion-proof through hole 111 corresponding to the liquid injection port and the pole, a liquid injection through hole 112, and a pole through hole 113. Through setting up explosion-proof through-hole, annotating liquid through-hole and utmost point post through-hole, wherein explosion-proof through-hole is used for dodging the explosion-proof valve region on the top cap, annotates the liquid through-hole and is used for dodging the top cap and annotates the liquid mouth region, and utmost point post through-hole is used for dodging top cap utmost point post.
In this embodiment, a plurality of siphon holes 211 are uniformly formed in the bottom surface coating sheet 21, so that the electrolyte can conveniently enter the battery cell through the siphon holes.
In this embodiment, after the upper film 1 and the lower film 2 coat the battery cell, the middle positions of the large surface and the side surface of the battery cell are bonded by using insulating glue, so that hot-melt bonding is not required, and the upper film and the lower film are convenient to install.
In this embodiment, the upper film 1 and/or the lower film 2 is one or two of a PI film, a PET film, a PP film, and a PVC film. Preferably, the upper film 1 and/or the lower film 2 is one or two of a PI film and a PET film.
Example 2
This example provides a lithium battery including the lithium prismatic battery Mylar film described in example 1.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the principles of the present invention should be included within the scope of the present invention.
Claims (7)
1. The utility model provides a square lithium cell Mylar membrane, its characterized in that, is including being used for the upper membrane on cladding electric core upper portion and being used for the lower membrane of cladding electric core lower part, the upper membrane includes top surface cladding piece, the both sides of top surface cladding piece are equipped with big face cladding piece respectively, and every both sides of going up big face cladding piece are equipped with side face cladding piece respectively, the membrane includes bottom surface cladding piece down, the both sides of bottom surface cladding piece are equipped with big face cladding piece down respectively, and every both sides of big face cladding piece are equipped with the downside cladding piece respectively down, go up membrane and lower membrane cladding electric core back at the middle part position department of electric core big face and side and overlap partially and be glued together.
2. The Mylar film for a square lithium battery as claimed in claim 1, wherein the top cover sheet is provided with an explosion-proof valve, an explosion-proof through hole, a liquid injection through hole and a pole through hole corresponding to the liquid injection port and the pole on the top cover.
3. The Mylar (r) film of a square lithium battery of claim 1, wherein the bottom clad sheet has a plurality of siphon holes formed therein.
4. The Mylar (r) film of a square lithium battery of claim 1, wherein the upper and lower films are bonded to the cell by insulating glue at the middle of the large and side faces of the cell after the cell is covered by the upper and lower films.
5. The Mylar (r) film of a lithium prismatic battery of claim 1, wherein the upper and/or lower film is one or both of a PI film, a PET film, a PP film, and a PVC film.
6. The Mylar film for a lithium prismatic battery of claim 5, wherein the upper film and/or the lower film is one or both of a PI film and a PET film.
7. A lithium battery comprising a lithium prismatic battery Mylar film as claimed in any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022930011.3U CN213989009U (en) | 2020-12-07 | 2020-12-07 | Square lithium battery Mylar film and lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022930011.3U CN213989009U (en) | 2020-12-07 | 2020-12-07 | Square lithium battery Mylar film and lithium battery |
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| Publication Number | Publication Date |
|---|---|
| CN213989009U true CN213989009U (en) | 2021-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022930011.3U Active CN213989009U (en) | 2020-12-07 | 2020-12-07 | Square lithium battery Mylar film and lithium battery |
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| CN (1) | CN213989009U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116365147A (en) * | 2023-05-31 | 2023-06-30 | 深圳海辰储能控制技术有限公司 | Energy storage battery, energy storage device and electric equipment |
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2020
- 2020-12-07 CN CN202022930011.3U patent/CN213989009U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116365147A (en) * | 2023-05-31 | 2023-06-30 | 深圳海辰储能控制技术有限公司 | Energy storage battery, energy storage device and electric equipment |
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Address after: 361000 201-1, complex building 5, No. 11, Butang Middle Road, torch high tech Zone (Tongxiang) industrial base, Xiamen, Fujian 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. |