CN216928855U - Laminate structure of soft package battery without termination adhesive tape - Google Patents
Laminate structure of soft package battery without termination adhesive tape Download PDFInfo
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- CN216928855U CN216928855U CN202122896490.6U CN202122896490U CN216928855U CN 216928855 U CN216928855 U CN 216928855U CN 202122896490 U CN202122896490 U CN 202122896490U CN 216928855 U CN216928855 U CN 216928855U
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- diaphragm
- laminate structure
- pole pieces
- tape
- pouch cell
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model discloses a soft package battery lamination structure without a termination adhesive tape. The laminate structure of the soft package battery of the non-stop adhesive tape comprises: the battery core body comprises a plurality of pole pieces which are sequentially stacked along a specified direction; the first part of the diaphragm and the pole pieces are sequentially alternately stacked at intervals, and the bottommost layer and the topmost layer of a lamination structure formed by stacking the first part of the diaphragm and the pole pieces are the first part of the diaphragm; the second portion of the diaphragm wraps around an exterior of the lamination stack. The utility model has simple structure and convenient use, is simply transformed on the original basis, and obtains the naked electric core without the fixation of the stop adhesive tape by hot-pressing the naked electric core through the hot-pressing device, thereby further improving the production efficiency.
Description
Technical Field
The utility model relates to a battery lamination structure, in particular to a soft package battery lamination structure without a termination adhesive tape, and belongs to the technical field of batteries.
Background
In recent years, under the situation that the country greatly supports the new energy battery industry, the manufacturing industry of the lithium ion battery has unprecedented development. Under such circumstances, the requirements for energy density and production efficiency of lithium ion batteries are becoming more and more strict, and therefore, it is necessary to enhance the control of each production process of battery production, to improve the production efficiency of products in each production process, and to improve the energy density of batteries.
Lithium metal laminate polymer battery structurally adopts the plastic-aluminum membrane packing, under the condition that takes place the potential safety hazard, can not explode like steel-shelled, aluminum-shelled battery, laminate polymer battery can only blow out and split at most. In addition, the soft package battery has 10-15% of capacity higher than that of a steel shell battery with the same specification and size and 5-10% of capacity higher than that of an aluminum shell battery, and can customize soft package lithium batteries with different specifications and shapes according to the requirements of customers.
However, in the lamination process of the lithium metal battery, a terminating tape needs to be pasted to fix the battery, and manual correction is needed under the condition that the terminating tape is not well attached, so that the production time and labor cost of the battery are prolonged.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a laminate structure of a soft package battery without a termination adhesive tape, which overcomes the defects in the prior art.
In order to achieve the purpose of the utility model, the technical scheme adopted by the utility model comprises the following steps:
the embodiment of the utility model provides a laminate structure of a soft-package battery without a termination adhesive tape, which comprises the following components in part by weight:
the battery core body comprises a plurality of pole pieces which are sequentially stacked along a specified direction;
the first part of the diaphragm and the pole pieces are sequentially alternately stacked at intervals, and the bottommost layer and the topmost layer of a lamination structure formed by stacking the first part of the diaphragm and the pole pieces are the first part of the diaphragm; the second portion of the diaphragm wraps around an exterior of the lamination stack.
Preferably, the first portion of the membrane is folded in a given direction into a plurality of membrane layers, each of the pole pieces being disposed between two adjacent membrane layers.
Preferably, the first and second portions of the diaphragm are disposed in series.
Preferably, the plurality of pole pieces comprise a plurality of positive pole pieces and a plurality of negative pole pieces, and the plurality of positive pole pieces and the plurality of negative pole pieces are alternately arranged at intervals in sequence.
Preferably, the plurality of positive electrode tabs are electrically connected, and the plurality of negative electrode tabs are electrically connected.
Preferably, the plurality of positive electrode tabs are further electrically connected to one positive electrode tab, and the plurality of negative electrode tabs are further electrically connected to one negative electrode tab.
Preferably, the thickness of the positive plate is 80-200 μm; and/or the thickness of the negative plate is 20-150 μm.
Preferably, the length of the negative electrode plate is 1mm-2mm greater than that of the positive electrode plate; and/or the width of the negative plate is 1mm-2mm larger than that of the positive plate.
Preferably, the width of the topmost pole piece of the battery core body is recorded as B; the starting end of the second part of the diaphragm is fixedly connected with the terminating end of the first end part, the terminating end of the second part of the diaphragm is arranged on the first part of the topmost diaphragm, the width of the second part of the diaphragm on the topmost pole piece of the battery core body is A, and A is more than or equal to 0.5B and less than or equal to B.
The embodiment of the utility model provides a battery, wherein a soft package battery lamination structure of a non-stop adhesive tape is packaged in a battery shell.
Compared with the prior art, the utility model has the advantages that:
1. the soft package battery lamination structure without the termination adhesive tape provided by the embodiment of the utility model has the advantages that the structure is simple, the use is convenient, the simple transformation is carried out on the original basis, the bare cell is subjected to hot pressing through the hot pressing device, the bare cell without the termination adhesive tape for fixing is obtained, the production efficiency is further improved, and the labor cost is reduced.
2. According to the laminate structure of the soft-package battery without the termination adhesive tape, the prepared battery positive plate or negative plate is tightly attached to the diaphragm, so that the electrolyte is conveniently wetted after liquid injection, the improvement on the uniformity of batteries in the same batch is promoted, and the stable performance of the batteries is further ensured.
Drawings
In order to more clearly illustrate the embodiments of the present application 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 described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic diagram of a separator-wound battery in a laminate structure of a soft-package battery without a termination adhesive tape according to an exemplary embodiment of the present invention;
fig. 2 is a schematic diagram of a separator-wound battery in a laminate structure of a pouch battery without a termination tape according to an exemplary embodiment of the present invention;
fig. 3 is a schematic view of a hot-pressing structure of a laminate structure of a soft-package battery without a termination adhesive tape according to an exemplary embodiment of the present invention;
description of reference numerals: 1. a diaphragm; 2. a negative plate; 3. a positive plate; 4. a lower hot pressing plate; 5. a naked battery cell; 6. a conveyor belt; 7. a roller; 8. a diaphragm starting point; 9. the diaphragm ends.
Detailed Description
In view of the deficiencies in the prior art, the inventors of the present invention have made extensive studies and extensive practices to provide technical solutions of the present invention. The technical solution, its implementation and principles, etc. will be further explained as follows.
Referring to fig. 1 to fig. 3, the laminate structure of a pouch battery without a termination adhesive tape according to the present embodiment includes: the battery core body comprises a plurality of pole pieces which are sequentially stacked along a specified direction, and a diaphragm 1 is arranged between the two pole pieces to separate the two adjacent pole pieces.
Furthermore, any two adjacent pole pieces are arranged, wherein the pole piece at the bottom is a first pole piece, and the pole piece above the first pole piece is a second pole piece.
Furthermore, the bottom surface of first pole piece is first contact surface, and the side of first pole piece is the second contact surface, the contact surface of first pole piece and second pole piece is the third contact surface, and, the third contact surface with first contact surface sets up back to back, a side of second pole piece is the fourth contact surface, the fourth contact surface is not in the coplanar with the second contact surface, be the fifth contact surface with the one side that the third contact surface set up back to back in the second pole piece.
And the diaphragm 1 is folded and wound around the first pole piece and the second pole piece.
Specifically, the first portion of the separator 1 may be wound around the first and second pole pieces in an S or Z shape (referring to fig. 2, the arrow direction is the winding direction of the separator 1). The second part of the membrane 1 is wrapped around the outside of the lamination.
In this embodiment, let the width of the topmost pole piece of the battery core be B; the starting end of the second part of the diaphragm 1 is fixedly connected with the terminating end of the first end part, the terminating end of the second part of the diaphragm 1 is arranged on the first part of the topmost diaphragm 1, the width of the second part of the diaphragm 1 on the topmost pole piece of the battery core body is A (the distance from the terminal point 9 of the diaphragm to the bending point of the diaphragm 1 is A), and the A is more than or equal to 0.5B and less than or equal to B.
Specifically, A is more than or equal to 0.5B and less than or equal to B, and within the range, the diaphragm 1 at the ending part of the naked electric core 5 is relatively stable in the moving process, and the diaphragm 1 is not easy to loosen after the hot-pressing treatment.
In this embodiment, the length of the diaphragm 1 on the starting surface of the pole piece is the same as the width of the pole piece (referring to fig. 2, the position of the starting point 8 of the diaphragm is overlapped with one end of the pole piece).
In this embodiment, the pole piece includes a positive pole piece 3 and a negative pole piece 2, specifically, the positive pole piece 3 is a ternary and/or lithium iron material, and the negative pole piece 2 is metal lithium.
In this embodiment, the positive electrode tabs 3 are electrically connected, and the negative electrode tabs 2 are electrically connected.
In this embodiment, the plurality of positive electrode tabs 3 are further electrically connected to one positive electrode tab, and the plurality of negative electrode tabs are further electrically connected to one negative electrode tab.
In this embodiment, the thickness of the positive electrode sheet 3 is 80 μm to 200 μm.
In this embodiment, the thickness of the negative electrode sheet 2 is 20 μm to 150 μm.
Furthermore, the thickness of the positive plate 3 is controlled to be 80-200 μm, and the thickness of the negative plate 2 is controlled to be 20-150 μm, so that the short circuit phenomenon of the stacked bare cell can be effectively reduced.
In the embodiment, the length of the negative plate 2 is 1mm-2mm greater than that of the positive plate 3; the width of the negative plate 2 is 1mm-2mm larger than that of the positive plate 3. The short circuit phenomenon that the naked electric core that can effectively reduce to fold appears.
Further, the diaphragm 1 is positioned between the positive plate 3 and the negative plate 2, and the three are folded into a rectangular battery core body in a Z shape.
In this embodiment, the hot press unit is used for hot-pressing the bare cell 5, so that the diaphragm 1 is closely attached to the surface of the pole piece.
Further, hot press unit can adopt hot pressboard 4 down, and the terminal face of pole piece contacts with hot pressboard 4 down in naked electric core 5, and through hot pressing of hot pressboard 4 to naked electric core 5 down, it is fixed not need to paste the termination sticky tape, can improve the production efficiency of battery, reduces battery manufacturing cost, improves battery performance uniformity.
After the hot pressing is finished, the lug is welded rapidly, then the shell is sealed in the top, the adhesive tape is not required to be pasted and stopped in the process, and the production efficiency and consistency of the battery can be improved.
In this embodiment, the terminal surface of the pole piece is in contact with the hot pressing surface of the hot pressing device.
It should be noted that the terminal surface of the pole piece is ensured to contact with the hot-pressing surface of the hot-pressing device, for example: the pole piece end face is in contact with the lower hot platen 4, that is to say the pole piece end face is facing downwards. If pole piece terminating surface and 4 contactless of lower hot pressboard, then diaphragm 1 after the hot pressing can form the fold with the pole piece surface, makes naked electric core 5 surface not smooth enough, leads to production efficiency and homogeneity to reduce.
In this embodiment, the hot-pressing temperature of the hot-pressing device is 60 ℃ to 100 ℃.
In this embodiment, the hot pressing pressure of the hot pressing device is 1200-1800 KGF.
Specifically, the optimal hot pressing time of the hot pressing device is controlled to be 30-120 s.
Further, adjust hot pressing temperature of hot press unit to between 60 ℃ -100 ℃ (such as 80 ± 5 ℃), hot pressing pressure of hot press unit is adjusted to between 1200KGF-1800KGF (such as 1400 ± 100KGF), when naked electric core 5 passes through hot press unit, hot press unit hot pressing 60s, at this moment, the diaphragm 1 on naked electric core 5 surface is by hot pressing effect best.
In this embodiment, no manufacture equipment that ends sticky tape laminate polymer battery lamination still includes conveyer belt 6, 6 both ends of conveyer belt are provided with drive belt pivoted running roller 7, and hot press unit set up in on the conveyer belt 6, hot press unit is used for the naked electric core 5 on the hot pressing conveyer belt 6.
Further, running roller 7 rotates and drives conveyer belt 6 and rotate, further makes naked electric core 5 on the conveyer belt 6 remove toward hot press unit direction.
In this embodiment, the temperature resistance of the conveyor belt 6 is greater than 120 ℃.
Specifically, the material of the conveyor belt 6 may be one or more of felt, canvas, polytetrafluoroethylene, silica gel, rubber, and the like. That is, the temperature resistance of the conveyor belt 6 must be higher than the maximum hot-pressing temperature of the hot-pressing device, so as to prevent the conveyor belt 6 from being damaged due to high temperature and high pressure during the hot-pressing process.
The present embodiment also provides a battery in which a pouch cell laminate structure without a termination tape is encapsulated in a battery case.
The working principle of the utility model is as follows:
firstly, a plurality of pole pieces are wound through a diaphragm 1, the diaphragm 1 sequentially passes through a first contact surface, a second contact surface and a third contact surface of the first pole piece to wind the first pole piece, then the diaphragm 1 sequentially passes through a fourth contact surface and a fifth contact surface of the second pole piece to wind the second pole piece, and by analogy, the pole pieces are wound into a naked electric core 5. Then the pole piece termination surface of naked electric core 5 is downward through the manipulator, places on conveyer belt 6, and naked electric core 5 conveys hot pressboard 4 department down through conveyer belt 6, and the hot pressing temperature of lower hot pressboard 4 is 80 + -5 ℃, and hot pressing pressure is 1400 + -100 KGF, and lower hot pressboard 4 is to naked electric core 5 hot pressing 60s, then with the naked electric core 5 utmost point ear welding after the hot pressing, goes into shell encapsulation afterwards and obtains electric core semi-manufactured goods. The adhesive tape for stopping adhesion can be omitted, the production efficiency of the battery is accelerated, the prepared battery positive plate 3 or negative plate 2 is tightly attached to the diaphragm 1, the electrolyte can be more conveniently wetted after liquid injection, and the uniformity of the batteries in the same batch is improved to a certain extent.
It should be understood that the above-mentioned embodiments are merely illustrative of the technical concepts and features of the present invention, which are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and therefore, the protection scope of the present invention is not limited thereby. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (11)
1. The utility model provides a laminate structure of laminate for soft package battery of no termination adhesive tape which characterized in that includes:
the battery core body comprises a plurality of pole pieces which are sequentially stacked along a specified direction;
the first part of the diaphragm and the pole pieces are sequentially alternately stacked at intervals, and the bottommost layer and the topmost layer of a lamination structure formed by stacking the first part of the diaphragm and the pole pieces are the first part of the diaphragm; the second portion of the diaphragm wraps around an exterior of the lamination stack.
2. The tape-less pouch cell laminate structure of claim 1, wherein: the first portion of the membrane is folded in a given direction into a plurality of membrane layers, with each of the pole pieces being disposed between two adjacent membrane layers.
3. The tape-less pouch cell laminate structure of claim 1, wherein: the first and second portions of the diaphragm are disposed in series.
4. The tape-less pouch cell laminate structure of claim 1, wherein: the plurality of pole pieces comprise a plurality of positive pole pieces and a plurality of negative pole pieces, and the positive pole pieces and the negative pole pieces are sequentially arranged alternately at intervals.
5. The laminate structure of pouch cell of non-terminating tape according to claim 4, wherein: the positive electrode plates are electrically connected, and the negative electrode plates are electrically connected.
6. The tape-less pouch cell laminate structure of claim 5, wherein: the plurality of positive plates are also electrically connected with one positive lug, and the plurality of negative plates are also electrically connected with one negative lug.
7. The tape-less pouch cell laminate structure according to claim 6, wherein: the thickness of the positive plate is 80-200 μm.
8. The tape-less pouch cell laminate structure of claim 6, wherein: the thickness of the negative plate is 20-150 μm.
9. The tape-less pouch cell laminate structure of claim 6, wherein: the length of the negative plate is 1mm-2mm greater than that of the positive plate.
10. The tape-less pouch cell laminate structure of claim 6, wherein: the width of the negative plate is 1mm-2mm larger than that of the positive plate.
11. The tape-less pouch cell laminate structure of claim 6, wherein: recording the width of the topmost pole piece of the battery core body as B; the starting end of the second part of the diaphragm is fixedly connected with the terminating end of the first end part, the terminating end of the second part of the diaphragm is arranged on the first part of the topmost diaphragm, the width of the second part of the diaphragm on the topmost pole piece of the battery core body is A, and A is more than or equal to 0.5B and less than or equal to B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122896490.6U CN216928855U (en) | 2021-11-24 | 2021-11-24 | Laminate structure of soft package battery without termination adhesive tape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122896490.6U CN216928855U (en) | 2021-11-24 | 2021-11-24 | Laminate structure of soft package battery without termination adhesive tape |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216928855U true CN216928855U (en) | 2022-07-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122896490.6U Active CN216928855U (en) | 2021-11-24 | 2021-11-24 | Laminate structure of soft package battery without termination adhesive tape |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216928855U (en) |
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2021
- 2021-11-24 CN CN202122896490.6U patent/CN216928855U/en active Active
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