CN210956892U - Formula soft-packaged electric core is buckled to butterfly bean - Google Patents
Formula soft-packaged electric core is buckled to butterfly bean Download PDFInfo
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- CN210956892U CN210956892U CN201922170521.2U CN201922170521U CN210956892U CN 210956892 U CN210956892 U CN 210956892U CN 201922170521 U CN201922170521 U CN 201922170521U CN 210956892 U CN210956892 U CN 210956892U
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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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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- General Chemical & Material Sciences (AREA)
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- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model discloses a sphenoidea button type soft package battery cell, which comprises an upper aluminum-plastic film layer, a lower aluminum-plastic film layer and a battery cell body, the lower aluminum-plastic film layer is provided with a first cavity for accommodating the battery cell body, the upper aluminum-plastic film layer and the lower aluminum-plastic film layer are respectively and tightly attached to the upper part and the lower part of the battery cell body at the corresponding positions above and below the battery cell body, the upper aluminum-plastic film layer and the lower aluminum-plastic film layer are fixed in a sealing hot-pressing manner at the overlapped part extending outwards and radially from the vertical surface of the battery cell body to form a sealing edge, the sealing edge extends to the top of the battery cell body along the vertical surface of the battery cell body, the periphery of the sealing edge is formed by enclosing straight edges and round edges in an end-to-end connection manner, the upper aluminum-plastic film layer and the lower aluminum-plastic film layer are integrally fixed at the positions corresponding to the straight edges, and an air bag for containing redundant electrolyte and gas is further arranged on one side, away from the straight edge, of the round edge of the upper aluminum-plastic film layer. The utility model discloses a soft packet of electricity core is detained to butterfly bean simple structure, arrange in a flexible way, the practicality is strong, the security is high and improve the excellent rate of finished product greatly.
Description
Technical Field
The utility model relates to a battery technology field especially relates to a formula laminate polymer battery core is detained to butterfly bean.
Background
At present, lithium ion power batteries have the advantages of high specific energy, high cycle frequency, long storage time and the like, are not only often used in portable electronic devices such as mobile phones, digital video cameras and notebook computers, but also are increasingly used in large and medium-sized electric devices such as electric automobiles, electric bicycles and electric tools, and therefore, the performance requirements on the lithium ion power batteries are higher and higher.
For the soft package lithium ion battery, the characteristics of simple design, safety, high energy density and the like are welcomed by the market, but in the manufacturing process of the soft package lithium ion battery in the prior art, firstly, the battery cell is arranged in the aluminum plastic film, and then the electrolyte is injected after the battery cell is sealed, so that a polarization reaction is generated, when the lithium ions of the battery are activated and dissociated, the battery cell can generate carbon dioxide, methane and other gases which can not be discharged, so that the pole pieces can expand, the gap in the winding body is enlarged, the electrolyte is deposited, so that the size of the battery is deformed, the positive pole piece and the negative pole piece are not tightly attached, the SEI film forming is influenced, the lithium is easily separated, and the potential safety hazards of poor battery cell.
Disclosure of Invention
The utility model relates to a solve not enough among the prior art and accomplish, the utility model aims at providing a simple structure, arrange nimble, the practicality is strong, the safety is good and improve the soft packet of electricity core of formula is buckled to the butterfly beans of finished product goodness greatly.
The utility model relates to a sphenoidea button type soft package battery cell, which comprises an upper aluminum-plastic film layer, a lower aluminum-plastic film layer and a battery cell body, the lower aluminum-plastic film layer is provided with a first cavity for accommodating the battery cell body, the upper aluminum-plastic film layer and the lower aluminum-plastic film layer are respectively and tightly attached to the upper part and the lower part of the battery cell body at the corresponding positions above and below the battery cell body, the upper aluminum-plastic film layer and the lower aluminum-plastic film layer are fixed in a sealing hot-pressing manner at the overlapped part extending outwards and radially from the vertical surface of the battery cell body to form a sealing edge, the sealing edge extends to the top of the battery cell body along the vertical surface of the battery cell body, the periphery of the sealing edge is formed by enclosing straight edges and round edges in an end-to-end connection manner, the upper aluminum-plastic film layer and the lower aluminum-plastic film layer are integrally fixed at the positions corresponding to the straight edges, and an air bag for containing redundant electrolyte and gas is further arranged on one side, away from the straight edge, of the round edge of the upper aluminum-plastic film layer.
The utility model discloses a formula soft-packaged electrical core can also be buckled to butterfly bean:
the upper aluminum-plastic film layer is also provided with a second cavity for accommodating the battery cell body.
The battery cell comprises a battery cell body, and is characterized in that a first insulating layer is arranged between an upper aluminum plastic film and the battery cell body, the upper surface of the first insulating layer is fixed with the inner wall of the upper aluminum plastic film, the lower surface of the first insulating layer is tightly attached to the battery cell body, and two ends of the first insulating layer extend to the inner periphery of the sealed edge along the inner side of the upper aluminum plastic film.
The battery cell body is including rolling up and locating central coiling piece, the interval that has infiltrated electrolyte set up in anodal ear and negative pole ear on the coiling piece, the stiff end of anodal ear with the stiff end of negative pole ear respectively with the coiling piece is connected, the free end of anodal ear with the free end of negative pole ear all passes the banding extends to the outside of battery cell body.
The free end of the positive lug is fixed with the overlapping position of the sealed edge in a three-layer mode through the upper aluminum-plastic film layer and the lower aluminum-plastic film layer, and the free end of the negative lug is fixed with the overlapping position of the sealed edge in a three-layer mode through the upper aluminum-plastic film layer and the lower aluminum-plastic film layer.
The included angle between the positive electrode lug and the negative electrode lug is set to be 5-180 degrees.
The winding piece is cylindric or square, the winding piece includes positive plate, negative pole piece and barrier film, positive plate with the negative pole piece is the range upon range of coiling formation cylinder in turn, the barrier film set up in positive plate with between the negative pole piece.
The positive plate, the negative plate and the isolating film are fully soaked by the electrolyte.
The positive plate comprises a positive current collector and a positive coating body coated outside the current collector, and the negative plate comprises a negative current collector and a negative coating body coated outside the current collector.
The outer periphery of the winding piece is provided with a second insulating layer, the inner side of the second insulating layer is tightly attached to the outer periphery of the winding piece, and the outer side of the second insulating layer is tightly attached to the lower aluminum-plastic film layer.
The utility model relates to a sphenoidea button type soft package battery cell, which comprises an upper aluminum-plastic film layer, a lower aluminum-plastic film layer and a battery cell body, the lower aluminum-plastic film layer is provided with a first cavity for accommodating the battery cell body, the upper aluminum-plastic film layer and the lower aluminum-plastic film layer are respectively and tightly attached to the upper part and the lower part of the battery cell body at the corresponding positions above and below the battery cell body, the upper aluminum-plastic film layer and the lower aluminum-plastic film layer are fixed in a sealing hot-pressing manner at the overlapped part extending outwards and radially from the vertical surface of the battery cell body to form a sealing edge, the sealing edge extends to the top of the battery cell body along the vertical surface of the battery cell body, the periphery of the sealing edge is formed by enclosing straight edges and round edges in an end-to-end connection manner, the upper aluminum-plastic film layer and the lower aluminum-plastic film layer are integrally fixed at the positions corresponding to the straight edges, and an air bag for containing redundant electrolyte and gas is further arranged on one side, away from the straight edge, of the round edge of the upper aluminum-plastic film layer. Thus, firstly, an aluminum-plastic film is punched to form a first folding part with an air bag and a second folding part with the first cavity, certainly not limited to the first folding part with the air bag, or the first folding part or the second folding part with the air bag with the first cavity and the first folding part and the second folding part both with symmetrical distribution, the symmetrical centers of the first folding part and the second folding part are provided with a folding line, the battery cell body is put into the first cavity, then the first folding part is folded upwards along the folding line, so that the first folding part forms the upper aluminum-plastic film layer, the second folding part forms the lower aluminum-plastic film layer, the folding line forms the straight edge, then the upper aluminum-plastic film layer and the lower aluminum-plastic film layer are sealed, one side of the air bag is communicated with the outside, and the air bag is communicated with the first cavity, through air pocket lateral the vacuum is annotated fast for electrolyte is right in the first cavity infiltration of electricity core body, excessive electrolyte does not have the dead angle and soaks electricity core body can effectively reduce the infiltration time that stews, annotates the liquid rifle and can effectively avoid electrolyte to sputter the battery surface in can inserting the water conservancy diversion completely, to the air pocket outside after electrolyte with electricity core body fills the contact last plastic-aluminum rete with the plastic-aluminum rete encapsulates down. And then the battery core body is charged by using a small current, the battery core body is formed, when lithium ions of the battery are activated and dissociated, the battery core can generate gases such as carbon dioxide and methane, after the battery generates gas, most of the gas and redundant electrolyte are drained into the gas bag through the communication part of the first cavity and the gas bag to be stored, and the size of the battery core is effectively ensured not to be deformed in the formation process, and the risk of redundant liquid sedimentation is avoided. And then pricking the air bag to form gas such as carbon dioxide and methane, and extracting excessive electrolyte, so as to perform secondary packaging on the battery cell, and finally cutting out a required shape such as a circle, so as to form the round edge, and reserving the straight edge without cutting. The utility model discloses a soft packet of electricity core is detained to butterfly bean, advantage for prior art is: simple structure, flexible arrangement, strong practicability, good safety and greatly improved excellent rate of finished products.
Drawings
Fig. 1 the utility model relates to a soft-packaged electric core embodiment explosion diagram is detained to butterfly bean.
Fig. 2 the utility model relates to a soft-packaged electrical core elevation view is detained to butterfly bean.
Fig. 3 the utility model relates to a formula soft-packaged electrical core picture 2A-A section view is detained to butterfly bean.
Fig. 4 the utility model relates to a soft-packaged electric core embodiment stereogram is detained to butterfly bean.
Fig. 5 the utility model relates to a two stereograms of formula soft-packaged electrical core embodiment are detained to butterfly bean.
Description of the figures
1 … injection layer 2 … cell body 3 … aluminum plastic film layer
4 … lower aluminum plastic film layer 5 … positive tab 6 … negative tab
7 … edge banding 8 … straight edge 9 … round edge
11 … tab glue 12 … first cavity 13 … second cavity
14 … first fold 15 … second fold 16 … first layer of insulation
17 … second insulation layer 18 … air bag 19 … roll
20 … positive plate 22 … negative plate 24 … isolating film
25 … fold line 26 … casing
Detailed Description
The following describes a sphenoidal button type soft-packaged electrical core in detail with reference to fig. 1 to 5 of the accompanying drawings.
The utility model relates to a sphenoidal buckle type soft package battery cell, please refer to the relevant figures in figures 1 to 5, which comprises an upper aluminum-plastic film layer 3, a lower aluminum-plastic film layer 4 and a battery cell body 2, wherein the lower aluminum-plastic film layer 4 is provided with a first cavity 12 for accommodating the battery cell body 2, the upper aluminum-plastic film layer 3 and the lower aluminum-plastic film layer 4 are respectively arranged at the corresponding positions above and below the battery cell body 2 and are tightly attached to the upper part and the lower part of the battery cell body 2, the upper aluminum-plastic film layer 3 and the lower aluminum-plastic film layer 4 are formed by enclosing the vertical surface of the battery cell body 2 outwards and radially extending the overlapped part in a sealing hot-pressing manner to form an edge sealing 7, the edge sealing 7 is arranged along the vertical surface of the battery cell body 2 and extends to the top of the battery cell body 2, the periphery of the edge sealing 7 is formed by enclosing straight edges 8 and round edges 9 end to end, the upper aluminum-to end aluminum-plastic film layer 3 and the lower aluminum-plastic film layer 4 are fixed at, the upper aluminum-plastic film layer 3 is further provided with an air bag 18 for accommodating redundant electrolyte and gas on one side of the round edge 9 far away from the straight edge 8. Thus, firstly, an aluminum-plastic film is punched to form a first folding portion 14 with an air bag 18 and a second folding portion 15 with the first cavity 12, certainly, the aluminum-plastic film is not limited to the first folding portion 14 with the first cavity 12 and the second folding portion 15 with the air bag 18, the first folding portion 14 or the second folding portion 15 with the first cavity 12 and the first folding portion 14 and the second folding portion 15 with the air bag 18 symmetrically distributed, the symmetrical centers of the first folding portion 14 and the second folding portion 15 are provided with a folding line 25, the cell body 2 is placed in the first cavity 12, then the first folding portion 14 is folded upwards along the folding line 25, so that the first folding portion 14 forms the upper aluminum-plastic film layer 3, the second folding portion 15 forms the lower aluminum-plastic film layer 4, the folding line 25 forms the straight edge 8, and then the upper aluminum-plastic film layer 3 and the lower aluminum-plastic film layer 4 are sealed, one side of the air bag 18 is communicated with the outside, the air bag 18 is communicated with the first cavity 12, liquid is rapidly injected into the first cavity 12 through one side of the air bag 18 in a vacuum mode, the infiltration of electrolyte into the electric core body 2 is accelerated, the electric core body 2 can be effectively shortened in standing infiltration time due to the fact that excessive electrolyte is infiltrated without dead angles, the liquid injection gun can be completely inserted into the flow guide hole, the electrolyte can be effectively prevented from being splashed to the surface of a battery, and after the electrolyte is fully contacted with the electric core body, the upper aluminum plastic film layer 3 and the lower aluminum plastic film layer 4 on the outer side of the air bag are packaged. And then the battery core body 2 is charged by using a small current, the battery core body 2 starts to be formed, when lithium ions of the battery are activated and dissociated, the battery core can generate gases such as carbon dioxide and methane, after the battery generates the gas, most of the gas and redundant electrolyte are drained into the gas bag 18 through the communication part of the first cavity 12 and the gas bag 18 to be stored, and the size of the battery core is effectively ensured to be free of deformation and redundant liquid sedimentation risk in the forming process. Then the air bag 18 is punctured and the generated gas such as carbon dioxide, methane and the like is extracted, and simultaneously the redundant electrolyte is extracted, so that the first cavity 12 and the air bag are in a vacuum state, further the electric core is packaged for the second time, finally the required shape such as a circle and the like is cut out, further the round edge 9 is formed, and the straight edge 8 is reserved and not cut out. The utility model discloses a soft packet of electricity core is detained to butterfly bean, advantage for prior art is: simple structure, arrange nimble, the practicality is strong, the security is good and can effectively promote product value.
The utility model discloses a soft packet of electricity core is detained to butterfly bean please refer to relevant each picture in figure 1 to figure 3, specifically can be on the basis of technical scheme in the front: the upper aluminum-plastic film layer 3 is also provided with a second cavity 13 for accommodating the battery cell body 2. Like this, if banding 7 by the middle section optional position of the vertical face of electricity core body 2 is outside radial extension, promptly the top of going up plastic-aluminum rete 3 with the top of lower plastic-aluminum rete 4 all with banding 7 has vertical distance, then it is necessary to go up plastic-aluminum rete 3 and set up second cavity 13, can guarantee with when the electricity core encapsulation goes up plastic-aluminum rete 3 with between the plastic-aluminum rete 4 down, go up plastic-aluminum rete 3 with can not cause because of having mutually to interfere between the electricity core the thinning of dragging of going up plastic-aluminum rete 3 even breaks. Of course, the air pockets 18 may be provided in the second folded portion 15, and the air pockets 18 of the first folded portion 14 and the air pockets 18 of the second folded portion 15 are overlapped after being folded in two, so that the air pockets 18 may have more space to accommodate more gas and surplus electrolyte. The height of the second cavity 13 can be adjusted according to the vertical distance from the top of the upper aluminum-plastic film layer 3 to the edge seal 7, and R-shaped round corners can be arranged at all bending positions including the bending positions of the first cavity 12, the second cavity 13 and the air bag 18, so that the fracture or uneven thickness after vertical stretching can be effectively avoided.
The utility model discloses a soft packet of electricity core is detained to butterfly bean please refer to relevant each picture in figure 1 to figure 3, can also be on the basis of technical scheme in the front: a first insulating layer 16 is arranged between the upper aluminum-plastic film and the cell body 2, the upper surface of the first insulating layer 16 is fixed to the inner wall of the upper aluminum-plastic film layer 3, the lower surface of the first insulating layer 16 is tightly attached to the cell body 2, and two ends of the first insulating layer 16 extend to the inner periphery of the seal edge 7 along the inner side of the upper aluminum-plastic film layer 3. In this way, a first insulating layer 16 is disposed at a position corresponding to the inner wall of the upper aluminum-plastic film layer 3 and the first cavity 12, or a first insulating layer 16 is disposed in the second cavity 13, the first insulating layer 16 is disposed between the upper aluminum-plastic film layer 3 and the battery cell body 2, because the upper aluminum-plastic film layer 3 is thinner, the first insulating layer 16 is increased, the thickness of the upper aluminum-plastic film layer 3 can be increased, and adverse consequences such as poor side voltage, aluminum layer corrosion, even short circuit and the like caused by the puncture of the upper aluminum-plastic film layer 3 are reduced. The first insulating layer 16 may be an insulating adhesive paper or the like.
The utility model discloses a soft packet of electricity core is detained to butterfly bean please refer to relevant each picture in fig. 1 to 5, can also be on the basis of technical scheme in the front: electric core body 2 including roll up locate the center and soak coiling piece 19, interval that have electrolyte set up in coiling piece 19 last anodal ear 5 and the negative pole ear 6, anodal ear 5's stiff end with negative pole ear 6's stiff end respectively with coiling piece 19 is connected, anodal ear 5's free end with negative pole ear 6's free end all passes banding 7 extends to electric core body 2's the outside. Thus, the free end of the positive tab 5 and the free end of the negative tab 6 may be symmetrically disposed to protrude from both sides of the winding member 19, respectively, or may be asymmetrically disposed. Will the electricity core body 2 is arranged in first cavity 12, works as positive tab 5 with negative pole ear 6 follows when the vertical face arbitrary position of electricity core body 2 radially extends, there is second cavity 13 on the upper portion of coiling piece 19 corresponds the position department, if positive tab 5 with negative pole ear 6 follows when the top or the bottom of electricity core body 2 radially extend, the upper portion of coiling piece 19 corresponds the position department and can not set up second cavity 13, then will have positive tab 5 with negative pole ear 6 extends the top or the bottom of electricity core body 2 with go up the corresponding putting into of plastic-aluminum membranous layer 3 in first cavity 12, like this, positive tab 5 with negative pole ear 6 just in time extends along the periphery of first cavity 12, then along the fifty percent discount line 25 fifty percent discount plastic-aluminum membrane again. A further preferable technical scheme is that the free end of the positive tab 5 is fixed with the upper aluminum-plastic film layer 3 and the lower aluminum-plastic film layer 4 in a three-layer manner at the overlapping position of the free end and the seal edge 7, and the free end of the negative tab 6 is fixed with the upper aluminum-plastic film layer 3 and the lower aluminum-plastic film layer 4 in a three-layer manner at the overlapping position of the free end and the seal edge 7. Like this, anodal ear 5 with go up plastic-aluminum rete 3 with the overlapping position department of plastic-aluminum rete 4 with go up plastic-aluminum rete 3 with the three laminar fixed of plastic-aluminum rete 4 down, negative pole ear 6 with go up plastic-aluminum rete 3 with the overlapping position department of plastic-aluminum rete 4 with go up plastic-aluminum rete 3 with the three laminar fixed of plastic-aluminum rete 4 down, anodal ear 5 with negative pole ear 6 respectively with go up plastic-aluminum rete 3 with plastic-aluminum rete 4 is fixed down, prevents anodal ear 5 with negative pole ear 6 removes at will and pierces through other spare parts and arouse bad consequence. A further preferable technical scheme is that the free end of the positive tab 5 is fixed with the upper aluminum-plastic film layer 3 and the lower aluminum-plastic film layer 4 in a three-layer manner through tab glue 11 at the overlapping position of the free end and the edge sealing 7, and the free end of the negative tab 6 is fixed with the upper aluminum-plastic film layer 3 and the lower aluminum-plastic film layer 4 in a three-layer manner through tab glue 11 at the overlapping position of the free end and the edge sealing 7. Thus, the insulating effect of the tab glue 11 prevents the positive tab 5 from contacting the upper aluminum-plastic film layer 3 and the lower aluminum-plastic film layer 4, and prevents the negative tab 6 from contacting the upper aluminum-plastic film layer 3 and the lower aluminum-plastic film layer 4.
The utility model discloses a soft packet of electricity core is detained to butterfly bean please refer to relevant each picture in fig. 1 to 5, can also be on the basis of technical scheme in the front: the included angle between the positive electrode tab 5 and the negative electrode tab 6 is set to be 5-180 degrees. Therefore, the positive electrode tab 5 and the negative electrode tab 6 can be randomly arranged, so that the distance between the direction led out by the positive electrode tab 5 and the negative electrode tab 6 and external equipment is shortest, and the positive electrode tab 5 and the negative electrode tab 6 are conveniently connected with the positive electrode and the negative electrode of the external equipment, so that the bending probability of the positive electrode tab 5 and the negative electrode tab 6 is reduced, and the service life of the battery cell is further prolonged.
The utility model discloses a soft packet of electricity core is detained to butterfly bean please refer to relevant each picture in fig. 1 to 5, can also be on the basis of technical scheme in the front: the winding piece 19 is cylindrical or square, the winding piece 19 comprises a positive plate 20, a negative plate 22 and an isolation film 24, the positive plate 20 and the negative plate 22 are alternately stacked and wound to form a cylinder, and the isolation film 24 is arranged between the positive plate 20 and the negative plate 22. Thus, the winding member 19 is cylindrical, so that the space occupied by the winding member 19 is small, and the space is saved. The winding member 19 is wound in a circle inside the cell body 2, and is formed by winding the positive electrode tab 20, the separator 24 and the negative electrode tab 22, and the separator 24 is used for preventing the positive electrode tab 20 and the negative electrode tab 22 from contacting each other to cause a short circuit. The positive tab 5 is connected to the positive plate 20, the negative tab 6 is connected to the negative plate 22, and the specific position can be set according to actual conditions, so that the connection between the battery cell body 2 and other parts is facilitated. In a further preferred embodiment, the positive electrode sheet 20, the negative electrode sheet 22, and the separation film 24 are fully soaked by the electrolyte. Thus, after the electric core is sealed once, the electrolyte is quickly injected into the first cavity 12 through the communication part of the air bag 18 and the second cavity 13 by a liquid injection gun in a vacuum environment, the infiltration of the electrolyte to the winding body is accelerated, the battery pole piece is infiltrated by the excessive electrolyte without dead angles, the standing infiltration time is effectively reduced, the tail part of the air bag 18 is sealed twice, then the winding piece 19 is charged with a small current through the positive electrode tab 5 and the negative electrode tab 6 to perform a polarization reaction, and gases such as carbon dioxide and methane are generated, enters the air bag 18 through the communication part of the first cavity 12 and the air bag 18 for storage, finally, the redundant electrolyte in the first cavity 12 and the redundant electrolyte and gas in the air bag are completely pumped out to ensure that the air bag is in a vacuum state, at this time, the upper aluminum-plastic film layer 3 and the lower aluminum-plastic film layer 4 are respectively tightly attached to the electric core body 2 at corresponding positions.
The utility model discloses a soft packet of electricity core is detained to butterfly bean please refer to relevant each picture in fig. 1 to 5, can also be on the basis of technical scheme in the front: the positive plate 20 comprises a positive current collector and a positive coating body coated outside the current collector, and the negative plate 22 comprises a negative current collector and a negative coating body coated outside the current collector. Thus, the positive current collector is generally made of aluminum foil, because the alumina layer on the surface of the aluminum foil is very compact, so that the oxidation potential of aluminum is higher than 4.7V when charging, and the negative current collector is generally made of copper foil, because it does not exist with lithium alloy phase under a certain temperature, intermetallic compounds cannot be theoretically formed, and then respectively on the outer surface of the positive current collector, the positive coating body and the outer surface of the negative current collector are provided with the negative coating body, the positive coating body is generally made of materials such as lithium nickel cobalt aluminate, conductive carbon black, carbon nanotube and binder and used for providing lithium ions for charging and discharging of the battery, and the negative coating body is generally made of materials such as dispersant, graphite, aqueous binder, conductive carbon black and conductive agent and used for bearing the embedding of lithium ions.
The utility model discloses a soft packet of electricity core is detained to butterfly bean please refer to relevant each picture in fig. 1 to 5, can also be on the basis of technical scheme in the front: the periphery of the winding piece 19 is provided with a second insulating layer 17, the inner side of the second insulating layer 17 is tightly attached to the periphery of the winding piece 19, and the outer side of the second insulating layer 17 is tightly attached to the lower aluminum-plastic film layer 4. In this way, the second insulating layer 17 is disposed between the lower aluminum-plastic film layer 4 and the winding member 19, because the lower aluminum-plastic film layer 4 is thinner, the second insulating layer 17 is increased, the thickness of the lower aluminum-plastic film layer 4 can be increased, and adverse consequences such as poor edge voltage, aluminum layer corrosion, even short circuit and the like caused by the puncture of the lower aluminum-plastic film layer 4 are reduced. The first insulating layer 16 may be an insulating adhesive paper or the like. A further preferable technical solution is that the free end of the positive tab 5 and the free end of the negative tab 6 are respectively bent upward from the inner side of the second insulating layer 17 to bypass the second insulating layer 17 and extend from the position corresponding to the edge seal 7 to the outer side of the edge seal 7. Therefore, the positive electrode tab 5 and the negative electrode tab 6 are attached to the second insulating layer 17 more regularly, and further the situation that the positive electrode tab 5 and the negative electrode tab 6 easily pierce parts at other positions due to irregular edges is avoided. In a further preferable technical scheme, the outer side of the second insulating layer 17 is tightly attached to the upper aluminum-plastic film layer 3. In this way, if the sealing edge 7 extends radially from the middle section of the vertical surface of the cell body 2, the winding element 19 and the upper plastic-aluminum film layer 3 also have an overlapping portion, and in order to prevent the upper plastic-aluminum film layer 3 from being punctured, the second insulating layer 17 may be added between the upper plastic-aluminum film layer 3 and the winding element 19, that is, the height of the second insulating layer 17 is slightly greater than the height of the winding element 19.
The utility model discloses a soft packet of electricity core is detained to butterfly bean please refer to relevant each picture in fig. 1 to 5, can also be on the basis of technical scheme in the front: the seal edge 7 extends out of the vertical surface of the cell body 2 and extends longitudinally along the vertical surface of the cell body 2. In this way, the edge sealing 7 is tightly attached to the vertical surface of the upper aluminum-plastic film layer 3 and the vertical surface of the lower aluminum-plastic film layer 4, so that the volume of the battery cell is reduced as much as possible. The method is mainly used for low-end and medium-end products with low requirements. A further preferable technical scheme is that a shell 26 is arranged on the periphery of the lower aluminum-plastic film layer 4, an injection molding layer 1 is arranged on the periphery of the upper aluminum-plastic film layer 3, a shielding part is further arranged between the upper aluminum-plastic film layer 3 and the injection molding layer 1, and the free end of the positive tab 5 and the free end of the negative tab 6 respectively extend out of the injection molding layer 1. Therefore, certain external force impact can be borne, the safety of the battery is high, and the shell 26 can be made of metal and other materials, so that the shell 26 and the shielding component can simultaneously shield an electromagnetic field generated when the battery works, and the battery is mainly used for high-end products.
The above description is only for the description of several embodiments of the present invention, but the scope of the present invention should not be considered as falling within the scope of the present invention, in which all the equivalent changes or modifications or the equal-scale enlargement or reduction etc. according to the design spirit of the present invention are made.
Claims (10)
1. The utility model provides a formula soft-packaged electric core is buckled to butterfly bean which characterized in that: comprises an upper aluminum-plastic film layer, a lower aluminum-plastic film layer and a battery cell body, wherein the lower aluminum-plastic film layer is provided with a first cavity for accommodating the battery cell body, the upper aluminum-plastic film layer and the lower aluminum-plastic film layer are respectively tightly attached to the upper part and the lower part of the battery cell body at the corresponding positions above and below the battery cell body, the upper aluminum-plastic film layer and the lower aluminum-plastic film layer are fixed in a sealing hot-pressing manner at the overlapped part extending outwards and radially from the vertical surface of the battery cell body to form a sealing edge, the sealing edge extends to the top of the battery cell body along the vertical surface of the battery cell body, the periphery of the sealing edge is formed by enclosing straight edges and round edges in an end-to-end connection manner, the upper aluminum-plastic film layer and the lower aluminum-plastic film layer are integrally fixed at the positions corresponding to the straight edges, and an air bag for containing redundant electrolyte and gas is further arranged on one side, away from the straight edge, of the round edge of the upper aluminum-plastic film layer.
2. The sphenoidal button type soft package battery cell of claim 1, which is characterized in that: the upper aluminum-plastic film layer is also provided with a second cavity for accommodating the battery cell body.
3. The sphenoidal button type soft package battery cell of claim 1, which is characterized in that: the battery cell comprises a battery cell body, and is characterized in that a first insulating layer is arranged between an upper aluminum plastic film and the battery cell body, the upper surface of the first insulating layer is fixed with the inner wall of the upper aluminum plastic film, the lower surface of the first insulating layer is tightly attached to the battery cell body, and two ends of the first insulating layer extend to the inner periphery of the sealed edge along the inner side of the upper aluminum plastic film.
4. The button-type soft package battery cell of any one of claims 1 to 3, wherein: the battery cell body is including rolling up and locating central coiling piece, the interval that has infiltrated electrolyte set up in anodal ear and negative pole ear on the coiling piece, the stiff end of anodal ear with the stiff end of negative pole ear respectively with the coiling piece is connected, the free end of anodal ear with the free end of negative pole ear all passes the banding extends to the outside of battery cell body.
5. The button-type soft package battery cell of sphenoidal beans according to claim 4, characterized in that: the free end of the positive lug is fixed with the overlapping position of the sealed edge in a three-layer mode through the upper aluminum-plastic film layer and the lower aluminum-plastic film layer, and the free end of the negative lug is fixed with the overlapping position of the sealed edge in a three-layer mode through the upper aluminum-plastic film layer and the lower aluminum-plastic film layer.
6. The button-type soft package battery cell of sphenoidal beans according to claim 4, characterized in that: the included angle between the positive electrode lug and the negative electrode lug is set to be 5-180 degrees.
7. The button-type soft package battery cell of sphenoidal beans according to claim 4, characterized in that: the winding piece is cylindric or square, the winding piece includes positive plate, negative pole piece and barrier film, positive plate with the negative pole piece is the range upon range of coiling formation cylinder in turn, the barrier film set up in positive plate with between the negative pole piece.
8. The button-type soft package battery cell of sphenoidal beans according to claim 7, characterized in that: the positive plate, the negative plate and the isolating film are fully soaked by the electrolyte.
9. The button-type soft package battery cell of sphenoidal beans according to claim 7, characterized in that: the positive plate comprises a positive current collector and a positive coating body coated outside the current collector, and the negative plate comprises a negative current collector and a negative coating body coated outside the current collector.
10. The button-type soft package battery cell of sphenoidal beans according to claim 7, characterized in that: the outer periphery of the winding piece is provided with a second insulating layer, the inner side of the second insulating layer is tightly attached to the outer periphery of the winding piece, and the outer side of the second insulating layer is tightly attached to the lower aluminum-plastic film layer.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922170521.2U CN210956892U (en) | 2019-12-06 | 2019-12-06 | Formula soft-packaged electric core is buckled to butterfly bean |
| PCT/CN2020/070767 WO2021109315A1 (en) | 2019-12-06 | 2020-01-07 | Butterfly bean button-type soft package battery cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922170521.2U CN210956892U (en) | 2019-12-06 | 2019-12-06 | Formula soft-packaged electric core is buckled to butterfly bean |
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| Publication Number | Publication Date |
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| CN210956892U true CN210956892U (en) | 2020-07-07 |
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| CN201922170521.2U Active CN210956892U (en) | 2019-12-06 | 2019-12-06 | Formula soft-packaged electric core is buckled to butterfly bean |
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| Country | Link |
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| CN (1) | CN210956892U (en) |
| WO (1) | WO2021109315A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112713340A (en) * | 2020-12-30 | 2021-04-27 | 深圳市齐得隆电子有限公司 | Novel high-capacity solid polymer lithium ion battery structure and manufacturing method |
| CN114156518A (en) * | 2020-09-07 | 2022-03-08 | 曙鹏科技（深圳）有限公司 | Packaging method of soft package button battery |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103730608B (en) * | 2012-10-11 | 2016-03-30 | 微宏动力***（湖州）有限公司 | Soft-package battery, soft-package battery sealing machine and soft-package battery mouth-sealing method |
| CN203660009U (en) * | 2013-12-23 | 2014-06-18 | 深圳市量能科技有限公司 | Flexibly-packaged polymer lithium ion battery for electronic cigarette and battery core thereof |
| CN104900918A (en) * | 2015-04-27 | 2015-09-09 | 东莞市安德丰电池有限公司 | Lithium ion battery preparation method |
| CN105702885B (en) * | 2016-04-06 | 2018-04-17 | 东莞市安德丰电池有限公司 | Encapsulating structure and its method for packing, the chemical synthesizing method of a kind of lithium ion battery |
| CN109273776B (en) * | 2018-09-19 | 2020-11-24 | 惠州亿纬锂能股份有限公司 | Battery cell film bag packaging method, battery preparation method and battery |
-
2019
- 2019-12-06 CN CN201922170521.2U patent/CN210956892U/en active Active
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2020
- 2020-01-07 WO PCT/CN2020/070767 patent/WO2021109315A1/en active Application Filing
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114156518A (en) * | 2020-09-07 | 2022-03-08 | 曙鹏科技（深圳）有限公司 | Packaging method of soft package button battery |
| CN112713340A (en) * | 2020-12-30 | 2021-04-27 | 深圳市齐得隆电子有限公司 | Novel high-capacity solid polymer lithium ion battery structure and manufacturing method |
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| Publication number | Publication date |
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| WO2021109315A1 (en) | 2021-06-10 |
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