CN114824677A - Soft package battery - Google Patents
Soft package battery Download PDFInfo
- Publication number
- CN114824677A CN114824677A CN202210403335.2A CN202210403335A CN114824677A CN 114824677 A CN114824677 A CN 114824677A CN 202210403335 A CN202210403335 A CN 202210403335A CN 114824677 A CN114824677 A CN 114824677A
- Authority
- CN
- China
- Prior art keywords
- metal sheet
- soft package
- package battery
- electrode plate
- plastic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910052751 metal Inorganic materials 0.000 claims abstract description 50
- 239000002184 metal Substances 0.000 claims abstract description 50
- 238000007789 sealing Methods 0.000 claims abstract description 26
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 19
- 230000000903 blocking effect Effects 0.000 claims abstract description 19
- 239000012528 membrane Substances 0.000 claims abstract description 15
- 229920000642 polymer Polymers 0.000 claims abstract description 15
- 239000003292 glue Substances 0.000 claims abstract description 14
- 230000004888 barrier function Effects 0.000 claims description 24
- 239000004020 conductor Substances 0.000 claims description 15
- 238000003825 pressing Methods 0.000 claims description 3
- 239000002985 plastic film Substances 0.000 abstract description 9
- 229920006255 plastic film Polymers 0.000 abstract description 9
- 239000003792 electrolyte Substances 0.000 abstract description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 4
- 210000002421 cell wall Anatomy 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 239000005030 aluminium foil Substances 0.000 description 4
- 239000011889 copper foil Substances 0.000 description 4
- 230000005574 cross-species transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- -1 diaphragm Substances 0.000 description 1
- 206010016766 flatulence Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
-
- 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
- H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
- H01M50/105—Pouches or flexible bags
-
- 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
- H01M50/172—Arrangements of electric connectors penetrating the casing
- H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
- H01M50/178—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for pouch or flexible bag cells
-
- 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
- H01M50/184—Sealing members characterised by their shape or structure
-
- 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
- H01M50/186—Sealing members characterised by the disposition of the sealing members
Abstract
The invention discloses a soft package battery, which comprises a soft package battery body, a metal sheet, an aluminum plastic film and a plurality of baffle plates, wherein the soft package battery body is provided with an electrode plate; two side surfaces of one end of the metal sheet are provided with grooves, and the other end of the metal sheet is connected with the electrode slice; all the blocking plates are respectively arranged at the bottoms of the two grooves, and the blocking plates and the metal sheet form included angles; the aluminum-plastic film wraps the soft package battery body, and the inner wall of the opening of the aluminum-plastic film is connected with one end of the metal sheet in a sealing mode through tab glue. The setting of recess and baffler for the length and the area of the surface area of sealing part side all increase, and utmost point ear glue is filled between the cell wall of baffler and recess and between baffler and the baffler, makes utmost point ear glue and bonds regional length and area grow between the sheetmetal, improves the bonding force between sheetmetal and the plastic-aluminum membrane, and the effectual corruption that has slowed down electrolyte between to sheetmetal and the plastic-aluminum membrane, improves laminate polymer battery's leakproofness and security.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a soft package battery.
Background
Laminate polymer battery utmost point ear is a subassembly of laminate polymer battery product, mainly includes metallic conductor, and metallic conductor glues through utmost point ear and bonds with other part seal. Laminate polymer battery is in long-term use, and utmost point ear glue can receive the influence of electrolyte corrosivity with metallic conductor for laminate polymer battery's leakproofness receives the influence, and then makes laminate polymer battery have the risk of flatulence weeping, and this can further influence laminate polymer battery's security performance.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the soft package battery which has better sealing performance.
The soft package battery comprises a soft package battery body, a metal sheet, an aluminum plastic film and a plurality of barrier plates, wherein the soft package battery body is provided with an electrode plate; one end of the metal sheet is a sealing part, two side surfaces of the sealing part are both provided with grooves, the other end of the metal sheet is a connecting part, and the connecting part is connected with the electrode plate; all the blocking plates are respectively arranged at the bottoms of the two grooves, and the blocking plates and the metal sheet form included angles; the plastic-aluminum membrane parcel laminate polymer battery body, the inner wall of plastic-aluminum membrane opening part with the sealing passes through utmost point ear and glues sealing connection.
The method has the following beneficial effects: the setting of recess and baffler, make length and the area of the surface area of sealing side all increase, when the sealing glued through utmost point ear and the plastic-aluminum membrane bonds, utmost point ear is glued and is filled between the cell wall of barrier plate and recess and between barrier plate and the barrier plate, make utmost point ear glue and the regional length and the area grow of bonding between sheetmetal, improve the bonding force between sheetmetal and the plastic-aluminum membrane, and the effectual corruption of electrolyte between to sheetmetal and the plastic-aluminum membrane that has slowed down, avoid electrolyte to spill over from between sealing and the plastic-aluminum membrane, improve laminate polymer battery's leakproofness and security.
According to some embodiments of the invention, the barrier plate is wedge-shaped.
According to some embodiments of the invention, the included angle between the baffle plate and the metal sheet is less than or equal to < A, and less than or equal to 30 degrees and less than or equal to 60 degrees.
According to some embodiments of the invention, the width of the junction of the barrier plate and the groove bottom is a, 5 μm < a < 50 μm, the length of the barrier plate is d, and the length d is equal to the width of the metal sheet.
According to some embodiments of the invention, the metal sheet has a thickness s, 5mm < s < 50 mm.
According to some embodiments of the invention, an end of the barrier plate remote from the trough bottom is a distance b from the trough bottom, 2mm < b < 30 mm.
According to some embodiments of the invention, the electrode sheet includes a multilayer metal conductor, and the connection portion is sandwiched between the metal conductor and the metal conductor.
According to some embodiments of the invention, the connecting portion and the electrode plate are connected together by pressing, and a plurality of concave points recessed towards the connecting portion are formed on the outer surface of the electrode plate.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The invention is further described with reference to the following figures and examples, in which:
fig. 1 is a schematic structural diagram of a pouch battery according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a metal sheet of a pouch battery according to an embodiment of the invention;
fig. 3 is a schematic side view of a metal sheet of a pouch battery according to an embodiment of the present invention;
fig. 4 is a partially enlarged schematic view of a portion a of fig. 3.
Reference numerals: metal sheet 100, groove 110, concave point 120, barrier plate 200, laminate polymer battery body 300, electrode slice 310.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, if there are first and second described only for the purpose of distinguishing technical features, it is not understood that relative importance is indicated or implied or that the number of indicated technical features or the precedence of the indicated technical features is implicitly indicated or implied.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1 to 3, the invention discloses a pouch battery, which comprises a pouch battery body 300, a metal sheet 100, an aluminum-plastic film and a plurality of barrier plates 200, wherein the pouch battery body 300 is provided with an electrode plate 310; one end of the metal sheet 100 is a sealing part, two side surfaces of the sealing part are both provided with grooves 110, the other end of the metal sheet 100 is a connecting part, and the connecting part is connected with the electrode plate 310; all the blocking plates 200 are respectively arranged at the bottoms of the two grooves 110, and the blocking plates 200 form included angles with the metal sheet 100; the aluminum-plastic film wraps the soft package battery body 300, and the inner wall of the opening of the aluminum-plastic film is connected with the sealing part in a sealing mode through tab glue.
Recess 110 and barrier plate 200's setting, make the length and the area of the surface area of sealing side all increase, when the sealing glued through utmost point ear and the plastic-aluminum membrane bonds, utmost point ear glue is filled between barrier plate 200 and recess 110's the cell wall and between barrier plate 200 and the barrier plate 200, make utmost point ear glue and the sheetmetal 100 between bonding region's length and area grow, improve the bonding force between sheetmetal 100 and the plastic-aluminum membrane, and the effectual corruption of electrolyte between to sheetmetal 100 and the plastic-aluminum membrane that has slowed down, avoid electrolyte to spill over from between sealing and the plastic-aluminum membrane, improve laminate polymer battery's leakproofness and security.
It should be understood that the soft package battery body 300 is provided with two electrode plates 310 in total, one electrode plate 310 is a positive electrode, and the other electrode plate 310 is a negative electrode; the number of the metal sheets 100 is also two, and the two metal sheets 100 have the same structure. The connecting portions of the two metal sheets 100 are welded with the two electrode plates 310, the aluminum plastic film wraps the soft package battery body 300, the two electrode plates 310 and the two connecting portions, and the inner wall of the opening of the aluminum plastic film is bonded with the two sealing portions.
It can be understood that separation plate 200 is the wedge, and the one end that separation plate 200 is close to the recess 110 tank bottom is connected with sheetmetal 100, and wedge-shaped separation plate 200 is convenient for process, improves laminate polymer battery's machining efficiency, and forms the clearance between separation plate 200 and the separation plate 200, and recess 110 is kept away from to separation plate 200's most advanced, and the inside width size in clearance is big more to the opening in clearance, and the utmost point ear of being convenient for glues and fills into the clearance. Specifically, the metal sheet 100 and the plurality of barrier plates 200 may be integrally formed.
Referring to fig. 4, the included angle between the blocking plate 200 and the metal sheet 100 is equal to or less than angle a, which is equal to or less than 30 degrees and equal to or less than 60 degrees. The blocking plate 200 is not vertically connected to the metal sheet 100, the blocking plate 200 is disposed in an inclined manner, according to the trigonometric theorem, the distance between the end of the blocking plate 200 away from the bottom of the groove 110 and the bottom of the groove is not changed, the blocking plate 200 is disposed in an inclined manner, the width of the blocking plate 200 can be made larger, that is, the length and the area of the surface area of the side surface of the sealing portion are increased more. With a range of 30 ° to 60 °, the barrier plate 200 can also be better machined.
It can be understood that the width of the connecting portion between the barrier plate 200 and the groove bottom is a, 5 μm < a < 50 μm, the width a is too small to facilitate the processing of the barrier plate 200, the structural strength of the barrier plate 200 is weak, the width a is too large, the number of barrier plates 200 that can be arranged in the groove 110 is reduced, and the effect of increasing the side length and the surface area of the sealing portion is not ideal; the length d of the barrier plate 200 is equal to the width of the metal sheet 100, the length direction of the barrier plate 200 is the same as the width direction of the metal sheet 100, and the width of the metal sheet 100 is generally 5mm to 15 mm. The thickness of the metal sheet 100 is s, s is less than 50mm when the thickness s is less than 5mm, the depth of the groove 110 is too small, the width of the barrier plate 200 is too small, the length and the surface area of the side surface of the sealing part cannot be effectively increased, and the conductivity of the metal sheet 100 is too small when the thickness s is too small. The distance between one end of the baffle plate 200 far away from the groove bottom and the groove bottom is b, and b is more than 2mm and less than 30 mm. The above dimension values can be selected according to actual needs, but the width and thickness of the metal sheet 100 cannot be too small, so that the current carrying capacity of the metal sheet 100 is ensured. Meanwhile, one end of the blocking plate 200, which is far away from the groove bottom, cannot protrude out of the side face of the metal sheet 100, so that the minimum thickness of the tab glue after condensation is prevented from being too small, and the bonding capability of the tab glue is further prevented from being reduced.
In the embodiment, width a is 20 μm, distance b is 10 μm, length d of groove 110 is equal to the width of metal sheet 100, the width of metal sheet 100 is 10mm, the width of groove 110 is 100 μm, included angle & ltA & gt is 30 DEG, and thickness s is 30 μm.
It can be understood that the electrode plate (310) comprises a plurality of layers of metal conductors, and the connecting portion is clamped between the metal conductors, so that two side surfaces of the connecting portion are respectively abutted to the two metal conductors, and the connecting effect and the conduction capability of the connecting portion and the electrode plate (310) are improved.
Specifically, laminate polymer battery body (300) is also called battery roll core, including diaphragm, copper foil and aluminium foil, through the diaphragm between copper foil and the aluminium foil, diaphragm, copper foil and aluminium foil three roll up the cubic form, and the one end of copper foil and aluminium foil is equipped with the first metallic conductor of polylith and second metallic conductor respectively, and the first metallic conductor coincide of polylith forms negative electrode slice, and the coincide of polylith second metallic conductor forms positive electrode slice.
It can be understood that the connecting portion and the electrode plate (310) are connected together in a pressing manner, and a plurality of concave points (120) recessed towards the direction of the connecting portion are formed on the outer surface of the electrode plate (310), that is, a part of metal material of the electrode plate (310) extends into the connecting portion, so that the connecting firmness and the conducting capacity of the connecting portion are ensured. Specifically, when connecting portion with electrode slice (310) are connected, usable two splint, the relative two faces of splint have the arch or the thorn suddenly, and two splint cramp electrode slice (310) and connecting portion, two sides of two splint butt electrode slice (310), and then make two sides of electrode slice (310) all be formed with concave point (120), and the side of connecting portion presents unsmooth form. The pits (120) are arranged in a plurality of rows, and the pits (120) in two adjacent rows are arranged in a staggered or aligned manner. Of course, the connection portion and the electrode plate 310 may be connected by welding.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The present invention is not limited to the above-described embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are included in the scope defined by the claims of the present application.
Claims (8)
1. Laminate polymer battery, its characterized in that includes:
the soft package battery comprises a soft package battery body, wherein an electrode plate is arranged on the soft package battery body;
the electrode plate comprises a metal sheet, a sealing part and a connecting part, wherein one end of the metal sheet is a sealing part, two side surfaces of the sealing part are respectively provided with a groove, the other end of the metal sheet is a connecting part, and the connecting part is connected with the electrode plate;
all the blocking plates are arranged at the bottoms of the two grooves respectively, and included angles are formed between the blocking plates and the metal sheets;
the plastic-aluminum membrane, the plastic-aluminum membrane parcel laminate polymer battery body, the inner wall of plastic-aluminum membrane opening part with the sealing passes through utmost point ear and glues sealing connection.
2. The pouch cell according to claim 1, wherein: the barrier plate is wedge-shaped.
3. The pouch cell according to claim 1 or 2, characterized in that: the included angle between the blocking plate and the metal sheet is less than or equal to angle A, and the included angle is less than or equal to 60 degrees and more than or equal to 30 degrees.
4. The pouch cell according to claim 1, wherein: the width of the connecting part of the blocking plate and the groove bottom is a, a is more than 5 mu m and less than 50 mu m, the length of the blocking plate is d, and the length d is equal to the width of the metal sheet.
5. The pouch cell according to claim 1, wherein: the thickness of the metal sheet is s, and s is more than 5mm and less than 50 mm.
6. The pouch cell according to claim 1 or 5, characterized in that: the distance between one end of the blocking plate far away from the groove bottom and the groove bottom is b, and b is more than 2mm and less than 30 mm.
7. The pouch cell according to claim 1, wherein: the electrode plate comprises a plurality of layers of metal conductors, and the connecting part is clamped between the metal conductors.
8. The pouch cell according to claim 1 or 7, characterized in that: the connecting portion is connected with the electrode plate in a pressing mode, and a plurality of concave points which are recessed towards the direction of the connecting portion are formed on the outer surface of the electrode plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210403335.2A CN114824677A (en) | 2022-04-18 | 2022-04-18 | Soft package battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210403335.2A CN114824677A (en) | 2022-04-18 | 2022-04-18 | Soft package battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114824677A true CN114824677A (en) | 2022-07-29 |
Family
ID=82536940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210403335.2A Pending CN114824677A (en) | 2022-04-18 | 2022-04-18 | Soft package battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114824677A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000285904A (en) * | 1999-03-31 | 2000-10-13 | Matsushita Electric Ind Co Ltd | Nonaqueous electrolytic battery and manufacture thereof |
| CN202495508U (en) * | 2012-02-13 | 2012-10-17 | 东莞新能源科技有限公司 | Soft package lithium ion battery and lug thereof |
| CN202839820U (en) * | 2012-08-16 | 2013-03-27 | 深圳市浩明电讯科技有限公司 | Disposal lithium-manganese battery cathode pole lug |
| CN207818656U (en) * | 2018-01-30 | 2018-09-04 | 宁德时代新能源科技股份有限公司 | Secondary cell |
| CN213401444U (en) * | 2020-10-19 | 2021-06-08 | 桑顿新能源科技有限公司 | Soft package lithium battery tab and soft package lithium battery |
| CN114361735A (en) * | 2022-01-04 | 2022-04-15 | 万向一二三股份公司 | Pole lug metal conductor structure for improving sealing performance of soft package lithium ion battery |
-
2022
- 2022-04-18 CN CN202210403335.2A patent/CN114824677A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000285904A (en) * | 1999-03-31 | 2000-10-13 | Matsushita Electric Ind Co Ltd | Nonaqueous electrolytic battery and manufacture thereof |
| CN202495508U (en) * | 2012-02-13 | 2012-10-17 | 东莞新能源科技有限公司 | Soft package lithium ion battery and lug thereof |
| CN202839820U (en) * | 2012-08-16 | 2013-03-27 | 深圳市浩明电讯科技有限公司 | Disposal lithium-manganese battery cathode pole lug |
| CN207818656U (en) * | 2018-01-30 | 2018-09-04 | 宁德时代新能源科技股份有限公司 | Secondary cell |
| CN213401444U (en) * | 2020-10-19 | 2021-06-08 | 桑顿新能源科技有限公司 | Soft package lithium battery tab and soft package lithium battery |
| CN114361735A (en) * | 2022-01-04 | 2022-04-15 | 万向一二三股份公司 | Pole lug metal conductor structure for improving sealing performance of soft package lithium ion battery |
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