CN211088395U - Lithium primary battery with high discharge efficiency - Google Patents
Lithium primary battery with high discharge efficiency Download PDFInfo
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- CN211088395U CN211088395U CN201921876625.9U CN201921876625U CN211088395U CN 211088395 U CN211088395 U CN 211088395U CN 201921876625 U CN201921876625 U CN 201921876625U CN 211088395 U CN211088395 U CN 211088395U
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- adhesive tape
- polymer adhesive
- positive plate
- tail end
- primary battery
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Abstract
The utility model relates to the technical field of batteries, especially, relate to a lithium primary battery that discharge efficiency is high. The lithium battery comprises a positive plate, a diaphragm, a lithium strip negative plate and lugs arranged on the positive plate and the negative plate, wherein the positive plate, the diaphragm and the lithium strip negative plate are mutually wound together by taking the lug end of the positive plate as a starting end, and a reaction inhibition area is arranged at the winding tail end of the positive plate; the reaction inhibition area is formed by adhering a front polymer adhesive tape sheet to the front side of the winding tail end of the positive plate and adhering a back polymer adhesive tape sheet to the back side of the winding tail end of the positive plate; the polymer adhesive tape piece is partially adhered to the winding tail end of the positive plate, and partially extends out of the winding tail end of the positive plate. The side edges of the reaction inhibition area formed by stacking and combining the polymer adhesive tape sheets are in a step shape, and the structure ensures that the battery discharges fully and effectively, so that the lithium primary battery has high discharge efficiency.
Description
Technical Field
The utility model relates to the technical field of batteries, especially, relate to a lithium primary battery that discharge efficiency is high.
Background
In the lithium primary battery manufactured by the traditional process, the reaction interface width corresponding to the positive electrode and the negative electrode, including the whole width of the negative electrode, is continuously consumed along with the continuous progress of electrochemical reaction, the metal lithium of the negative electrode is continuously consumed, the thickness of the metal lithium is smaller and smaller, when the reaction is carried out to the later stage, a part which is not connected with the negative electrode lug is formed in a local area where the negative electrode is tightly contacted with the positive electrode due to excessive reaction consumption, so that the lithium belt of the negative electrode is broken, part of the metal lithium cannot continuously participate in the reaction, the utilization rate of the negative electrode is reduced, and the.
SUMMERY OF THE UTILITY MODEL
To the technical problem, the utility model provides a lithium area reaction is abundant, the effective full play's of battery capacity lithium primary battery.
In order to solve the technical problem, the utility model provides a concrete scheme as follows: a lithium primary battery with high discharge efficiency comprises a positive plate, a diaphragm, a lithium strip negative plate and lugs arranged on the positive plate and the negative plate, wherein the positive plate, the diaphragm and the lithium strip negative plate are mutually wound together by taking the lug end of the positive plate as a starting end, and a reaction inhibition area is arranged at the winding tail end of the positive plate; the reaction inhibition area is formed by adhering a front polymer adhesive tape sheet to the front side of the winding tail end of the positive plate and adhering a back polymer adhesive tape sheet to the back side of the winding tail end of the positive plate; the polymer adhesive tape piece is partially bonded to the winding tail end of the positive plate, and partially extends out of the winding tail end of the positive plate. The winding inner side surface of the positive plate is defined as the positive plate front surface, and the winding outer side surface of the positive plate is defined as the positive plate back surface.
Further: in the lithium primary battery with high discharge efficiency, the width of the front and back polymer adhesive tape sheets is larger than that of the positive plate, only one side edge of the front and back polymer adhesive tape sheets is bonded to the winding tail end of the positive plate, and the other three side edges are suspended outside the winding tail end of the positive plate. The front and back polymer adhesive tape pieces are rectangular, and the length of the positive electrode piece bonded by the front polymer adhesive tape piece is 2-8 mm longer than that of the positive electrode piece bonded by the back polymer adhesive tape piece.
Or the side edge of the front polymer adhesive tape sheet is U-shaped.
And a layer of secondary polymer adhesive tape piece is bonded at the bonding position of the side edges of the two front polymer adhesive tape pieces, the secondary polymer adhesive tape piece is partially bonded on the positive plate and partially bonded on the front polymer adhesive tape piece, and the width of the secondary polymer adhesive tape piece is smaller than that of the positive plate.
The front and back polymer adhesive tape sheets and the secondary polymer adhesive tape sheet are any one of polyimide film, polyolefin film, polyester film or polyfluorine film.
Positive and negative polymer sticky tape piece and secondary polymer sticky tape piece all with be equipped with ya keli glue film or silica gel layer between the positive plate, be equipped with ya keli glue film or silica gel layer between positive polymer sticky tape piece and the secondary polymer sticky tape piece.
And further: in the lithium primary battery with high discharge efficiency, the positive plate is formed by uniformly stirring active substances such as manganese dioxide, iron disulfide and the like, a conductive agent and a binder in a solvent such as deionized water, N-methylpyrrolidone NMP and the like, coating the mixture on a positive current collector, and drying and rolling the mixture. The conductive agent is at least one of graphite and carbon black. The binder is at least one of polytetrafluoroethylene, vinylidene, hydroxymethyl cellulose CMC, styrene butadiene rubber SBR and polyacrylate terpolymer latex.
As is well known, when a lithium primary battery is manufactured, positive and negative electrode sheets are stacked together, one end of the positive electrode sheet is used as a winding start end. The utility model arranges a reaction inhibition area at the winding tail end of the positive plate; the reaction inhibiting region is formed by bonding polymer adhesive tape pieces on two surfaces of the winding tail end of the positive plate, the reaction polymer adhesive tape pieces are different in shape, the polymer adhesive tape pieces are partially bonded on the winding tail end of the positive plate, the reaction inhibiting region is formed by stacking and combining the polymer adhesive tape pieces, the side edges of the reaction inhibiting region are in a step shape, the structure ensures that the battery is fully and effectively discharged, and the lithium primary battery is high in discharging efficiency.
Drawings
FIG. 1 is a schematic diagram of a prior art comparative example 1, in which positive and negative electrode plates are unfolded;
FIG. 2 is a schematic structural diagram of the relative positions of the positive and negative electrode plates after being unfolded according to the present embodiment;
FIG. 3 is a schematic structural diagram of the relative positions of the two positive and negative electrode plates after being unfolded according to the present embodiment;
FIG. 4 is a schematic structural diagram of the relative positions of the three positive and negative electrode plates after being unfolded according to the present embodiment;
wherein, 1 positive plate, 2 negative plates, 3 tabs, 4 front polymer adhesive tape sheets, 5 back polymer adhesive tape sheets and 6 secondary polymer adhesive tape sheets.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following provides a further explanation of the technical solution of the present invention with reference to the accompanying drawings.
The first implementation mode comprises the following steps: as shown in fig. 2, a lithium primary battery with high discharge efficiency comprises a positive plate 1, a diaphragm, a lithium strip negative plate 2 and tabs 3 arranged on the positive plate and the negative plate, wherein the positive plate 1, the diaphragm and the lithium strip negative plate 2 are wound together with one end of the positive plate as a starting end, and a reaction inhibition area is arranged at the tail end of the winding of the positive plate 1; the reaction inhibition area is formed by adhering a front polymer adhesive tape sheet 4 to the front side of the winding tail end of the positive plate 1 and adhering a back polymer adhesive tape sheet 5 to the back side of the winding tail end of the positive plate 1; the polymer adhesive tape piece is partially adhered to the winding tail end of the positive plate 1, and partially extends out of the winding tail end of the positive plate 1. The width of the front and back polymer adhesive tape sheet is larger than that of the positive plate, only one side edge of the front and back polymer adhesive tape sheet is bonded to the winding tail end of the positive plate 1, and the other three side edges are suspended outside the winding tail end of the positive plate 1. The front and back polymer adhesive tape pieces 4 and 5 are both rectangular, and the length of the front polymer adhesive tape piece 4 bonded with the positive plate is 2-8 mm longer than that of the back polymer adhesive tape piece 5 bonded with the positive plate. And an acrylic glue layer or a silica gel layer is arranged between each of the positive and negative polymer adhesive tape pieces 4 and 5 and the secondary polymer adhesive tape piece 6 and the positive plate 1.
The positive plate is formed as follows: 1843g of heat-treated electrolytic manganese dioxide, 37g of graphite, 120g of conductive carbon black and 72g of polytetrafluoroethylene solution are weighed, evenly stirred in deionized water, coated on an aluminum net with the thickness of 0.3 mm, dried, rolled, cut and welded with a tab to form the positive plate 1, and the polymer adhesive tape sheet and the secondary polymer adhesive tape sheet are any one of polyimide film, polyolefin film, polyester film or polyfluorine film. An acrylic adhesive layer or a silica gel layer is arranged between each of the polymer adhesive tape pieces 4 and 5 and the positive plate 1, and the positive plate is formed by uniformly stirring active substances such as manganese dioxide, iron disulfide and the like, a conductive agent and a binder in a solvent such as deionized water, N-methylpyrrolidone NMP and the like, coating the mixture on a positive current collector, drying and rolling the mixture. The conductive agent is at least one of graphite and carbon black. The binder is at least one of polytetrafluoroethylene, vinylidene, hydroxymethyl cellulose CMC, styrene butadiene rubber SBR and polyacrylate terpolymer latex.
The second embodiment: as shown in fig. 3, in the first embodiment, the front polymer adhesive tape sheet 4 has a U-shaped side edge.
The third embodiment is as follows: as shown in fig. 4, in the second embodiment, a layer of secondary polymer adhesive tape sheet 6 is further bonded to the bonding position of the side edge of the front polymer adhesive tape sheet 4, the secondary polymer adhesive tape sheet is partially bonded to the positive electrode sheet and partially bonded to the front polymer adhesive tape sheet 4, and the width of the secondary polymer adhesive tape sheet 6 is smaller than that of the positive electrode sheet. The positive polymer adhesive tape piece 4 and the secondary polymer adhesive tape piece 6 are provided with an acrylic adhesive layer or a silica gel layer with the positive plate 1, and the secondary polymer adhesive tape piece 4 and the secondary polymer adhesive tape piece 6 are provided with an acrylic adhesive layer or a silica gel layer with the secondary polymer adhesive tape piece 6 therebetween.
Comparative example 1: as shown in figure 1, the lithium manganese battery comprises a positive plate 1, a lithium strip negative plate 2 and a tab 3 arranged on the positive plate, wherein the positive plate and the lithium strip negative plate are mutually wound together, and after the lithium strip positive plate and the lithium strip negative plate are unfolded, as shown in figure 1, the positive plate has no reaction inhibition area.
The experimental results of the embodiments and the comparative examples are shown in the following table 1:
table 1: capacity comparison of CR17345 cylindrical lithium manganese cell
The utility model arranges the reaction inhibiting area on the winding tail end of the positive plate, and the reaction inhibiting area is provided with the positive and negative polymer adhesive tape pieces 4 and 5; the reaction restraining area of the structure can ensure that the battery is fully and effectively discharged, so the utility model discloses a lithium primary battery has high discharge capacity. The positive electrode materials of the first, second and third embodiments are replaced by iron disulfide, and the effect is the same.
The above is the utility model discloses the implementation of preferred is not deviating from the utility model discloses under the design condition, carry out any obvious deformation and replacement, all belong to the utility model discloses a protection scope.
Claims (7)
1. The utility model provides a lithium primary battery that discharge efficiency is high, includes positive plate (1), diaphragm, lithium area negative pole piece (2) and sets up utmost point ear (3) on positive and negative pole piece, positive plate (1), diaphragm and lithium area negative pole piece (2) be in the same place its characterized in that with the utmost point ear end of positive plate coiling each other as the initiating terminal:
arranging a reaction inhibition area at the winding tail end of the positive plate (1); the reaction inhibition area is formed by adhering a front polymer adhesive tape sheet (4) to the front surface of the winding tail end of the positive plate (1) and adhering a back polymer adhesive tape sheet (5) to the back surface of the winding tail end of the positive plate (1);
the polymer adhesive tape piece is partially adhered to the winding tail end of the positive plate (1), and partially extends out of the winding tail end of the positive plate (1).
2. The lithium primary battery with high discharge efficiency according to claim 1, wherein: the width of the front and back polymer adhesive tape sheet is larger than that of the positive plate, only one side edge of the front and back polymer adhesive tape sheet is bonded to the winding tail end of the positive plate (1), and the other three side edges are suspended outside the winding tail end of the positive plate (1).
3. The lithium primary battery with high discharge efficiency according to claim 2, wherein: the front polymer adhesive tape piece (4) and the back polymer adhesive tape piece (5) are both rectangular, and the length of the front polymer adhesive tape piece (4) bonded with the positive plate is 2-8 mm longer than that of the back polymer adhesive tape piece (5) bonded with the positive plate.
4. The lithium primary battery with high discharge efficiency according to claim 2, wherein: the side edge of the front polymer adhesive tape sheet (4) is U-shaped.
5. The lithium primary battery with high discharge efficiency according to claim 3 or 4, wherein: a layer of secondary polymer adhesive tape piece (6) is bonded at the bonding position of the side edge of the front polymer adhesive tape piece (4), the secondary polymer adhesive tape piece is partially bonded on the positive plate, the secondary polymer adhesive tape piece is partially bonded on the front polymer adhesive tape piece (4), and the width of the secondary polymer adhesive tape piece (6) is smaller than that of the positive plate.
6. The lithium primary battery with high discharge efficiency according to claim 5, wherein: the front and back polymer adhesive tape sheets and the secondary polymer adhesive tape sheet are any one of polyimide film, polyolefin film, polyester film or polyfluorine film.
7. The lithium primary battery with high discharge efficiency according to claim 6, wherein: the positive and negative polymer adhesive tape pieces (4 and 5) and the secondary polymer adhesive tape piece (6) are respectively provided with an acrylic adhesive layer or a silica gel layer with the positive plate (1), and the acrylic adhesive layer or the silica gel layer is arranged between the positive polymer adhesive tape piece (4) and the secondary polymer adhesive tape piece (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921876625.9U CN211088395U (en) | 2019-11-04 | 2019-11-04 | Lithium primary battery with high discharge efficiency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921876625.9U CN211088395U (en) | 2019-11-04 | 2019-11-04 | Lithium primary battery with high discharge efficiency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211088395U true CN211088395U (en) | 2020-07-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921876625.9U Active CN211088395U (en) | 2019-11-04 | 2019-11-04 | Lithium primary battery with high discharge efficiency |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211088395U (en) |
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2019
- 2019-11-04 CN CN201921876625.9U patent/CN211088395U/en active Active
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