CN213583901U - Novel flexible package lithium ion battery - Google Patents
Novel flexible package lithium ion battery Download PDFInfo
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- CN213583901U CN213583901U CN202022702315.4U CN202022702315U CN213583901U CN 213583901 U CN213583901 U CN 213583901U CN 202022702315 U CN202022702315 U CN 202022702315U CN 213583901 U CN213583901 U CN 213583901U
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- core body
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- plastic film
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model discloses a novel flexible package lithium ion battery, which comprises a roll body, wherein the roll body is formed by stacking and winding a rectangular first diaphragm, a negative plate, a second diaphragm, a positive plate and a third diaphragm, the upper side of the roll body is wrapped with a first aluminum-plastic film, the lower side is wrapped with a second aluminum-plastic film, a sealing edge is formed between the first aluminum-plastic film and the second aluminum-plastic film through hot-pressing sealing connection, a plurality of tooth-shaped grooves formed by die stamping are arranged on the sealing edge, the rectangular positive plate vertically draws a positive plate lug along the short edge and extends out from the sealing edge, the rectangular negative plate vertically draws a negative plate lug along the short edge and extends out from the sealing edge, the joints of the positive plate and the positive plate lug are wrapped with a first plate lug glue, the joints of the negative plate and the negative plate lug are wrapped with a second plate lug glue, the sealing performance of the utility model is good, the appearance is more pleasing to the eye, improves assembly efficiency and assembly yields, and unit energy density is high.
Description
Technical Field
The utility model relates to a soft-packing lithium ion battery technical field, in particular to novel soft-packing lithium ion battery.
Background
The outer packing materials of the lithium battery are divided into a soft package and a hard package, and compared with hard packing materials such as a steel shell, an aluminum shell and the like, the soft packing material made of the multilayer film has the advantages of light weight, large capacity, high safety, free selection of packing shapes and the like.
The soft package lithium ion battery is small in size and can store more electric quantity, so that the use in daily life is very wide, the soft package lithium ion battery is light in weight and large in capacity, the soft package lithium ion battery can blow air at most and crack under the condition of potential safety hazard, explosion is not easy to occur, and the soft package lithium ion battery is generally arranged inside components and parts which are small in size, high in precision and strict in space limitation, such as a mouse, a mobile phone, a Bluetooth headset and the like.
However, in the prior art, the initial sealing edge in the radial state of the pouch battery needs to be bent to form a bent sealing edge in the axial state, and the bent sealing edge is wrapped on the side face of the pouch battery, wherein in the bending and wrapping process, the circumferential length of the initial sealing edge is reduced, so that a bent fold with a large size can be formed on the bent sealing edge, the sealing of the aluminum-plastic film is greatly stretched, the sealing performance of the sealing is affected, and the risk of liquid leakage is caused.
The soft package lithium ion battery manufactured by adopting the prior art has poor appearance and inconvenient installation, the sealing edge can rebound along the radial direction, the assembly efficiency is low, the assembly yield is low, the occupied installation space is large, and the unit energy density is low.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the above-mentioned defect among the prior art, provide a novel soft-packing lithium ion battery, its soft-packing lithium ion battery is reasonable to shrink the sealed limit, and is little to the plastic-aluminum membrane influence, and the leakproofness is good, does not have the risk of weeping, and the outward appearance is more pleasing to the eye, and the sealed limit is neat, regular, and also fine control sealed limit diameter is bounce-backed, improves assembly efficiency and assembly yields, and occupation space is little, and unit energy density is high.
In order to achieve the purpose, the utility model provides a novel flexible package lithium ion battery, which comprises a roll core body, the winding core body is formed by stacking and winding a rectangular first diaphragm, a rectangular negative plate, a rectangular second diaphragm, a rectangular positive plate and a rectangular third diaphragm, the upper side of the winding core body is wrapped with a first aluminum-plastic film, the lower side is wrapped with a second aluminum-plastic film, the first aluminum-plastic film and the second aluminum-plastic film are connected by hot pressing and sealing to form a sealing edge, the sealing edge is provided with a plurality of tooth-shaped grooves which are punched and formed by a die, the rectangular positive plate is vertically led out a positive pole lug along the short edge and extends out of the sealing edge, the rectangular negative plate is vertically led out of a negative pole lug along the short edge and extends out of the sealed edge, the joint of the positive plate and the positive pole lug is coated with a first lug glue, and the joint of the negative plate and the negative pole lug is coated with a second lug glue.
Preferably, the positive electrode tab is an aluminum-to-nickel electrode tab, the negative electrode tab is a nickel electrode tab, the positive electrode tab is connected with the positive electrode plate through welding, riveting or punching, and the negative electrode tab is connected with the negative electrode plate through welding, riveting or punching.
Preferably, the width of the winding core body is set to be 3 to 8mm, and the length is set to be 50 to 500 mm.
Preferably, the positive electrode tab and the negative electrode tab respectively extend towards two sides of the winding core body and are bent to the same height to be tightly attached to the winding core body.
Preferably, the angle between the positive electrode tab and the negative electrode tab is between 0 and 180 degrees.
Preferably, the first aluminum-plastic film is provided with an arc chamfer, the included angle between the side edge of the first aluminum-plastic film and the axis of the winding core body is 0-60 degrees, the second aluminum-plastic film is provided with an arc chamfer, and the included angle between the side edge of the second aluminum-plastic film and the axis of the winding core body is 0-60 degrees.
Preferably, the sealing edge provided with the plurality of tooth-shaped grooves is bent towards the axial direction of the winding core body, and the included angle between the sealing edge and the axis of the winding core body is 0-45 degrees.
Compared with the prior art, the beneficial effects of the utility model reside in that:
be equipped with the profile of tooth recess that a plurality of passes through mould stamping forming on the sealed limit, the sealed limit that is equipped with a plurality of profile of tooth recesses carries out the axial to rolling up the core body and buckling, make sealed limit and roll up the core body and closely laminate, it can make the sealed limit contract in order to be equipped with the profile of tooth recess, make roll up core body outward appearance more pleasing to the eye, the sealed limit is neat and regular, also fine control the sealed limit along radial bounce-back, improve assembly efficiency and assembly yields, it is tensile less to first plastic-aluminum membrane and second plastic-aluminum membrane simultaneously, it is little to the leakproofness influence of sealed limit, can prevent the weeping, even profile of tooth recess can not occupy the more space of electric core diameter direction, occupation space is little, unit energy density is high, do benefit to the capacity that promotes.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a stack of winding core bodies of a novel flexible package lithium ion battery provided by the present invention;
fig. 2 is a schematic diagram of a novel flexible package lithium ion battery provided by the present invention after bending an upper tab of a winding core body;
fig. 3 is a schematic view of the overall structure of the novel flexible package lithium ion battery provided by the present invention after the roll body is sealed;
fig. 4 is a sealed rear front view of a winding core body of a novel flexible package lithium ion battery provided by the present invention;
fig. 5 is a schematic top view of a sealing edge of a novel flexible package lithium ion battery provided by the present invention after being stamped by a die;
fig. 6 is a schematic structural diagram of a novel flexible package lithium ion battery after the shaping and folding edge of the winding core body.
The figure includes:
1-winding core body, 13-first diaphragm, 12-negative pole piece, 14-second diaphragm, 11-positive pole piece, 15-third diaphragm, 41-first aluminum plastic film, 42-second aluminum plastic film, 5-sealing edge, 51-tooth-shaped groove, 21-positive pole lug, 22-negative pole lug, 31-first pole lug glue and 32-second pole lug glue.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present embodiment, and it is obvious that the described embodiment is an embodiment of the present invention, not all embodiments. Based on this embodiment in the present invention, all other embodiments obtained by the ordinary skilled person in the art without creative work all belong to the protection scope of the present invention.
Example one
Referring to fig. 1 to 6, the present invention provides a novel flexible package lithium ion battery, which comprises a winding core body 1, as shown in fig. 1 and 2, wherein the winding core body 1 is formed by stacking and winding a rectangular first diaphragm 13, a rectangular negative plate 12, a rectangular second diaphragm 14, a rectangular positive plate 11 and a rectangular third diaphragm 15, as shown in fig. 3 and 4, the upper side of the winding core body 1 is wrapped with a first aluminum-plastic film 41, the lower side is wrapped with a second aluminum-plastic film 42, the first aluminum-plastic film 41 and the second aluminum-plastic film 42 are connected by hot-pressing sealing to form a sealing edge 5, as shown in fig. 5, the sealing edge 5 is provided with a plurality of tooth-shaped grooves 51 formed by die stamping, the sealing edge 5 provided with the plurality of tooth-shaped grooves 51 is bent axially towards the winding core body 1, so that the sealing edge 5 is tightly attached to the winding core body 1, and the sealing edge 5 is provided with the tooth-shaped grooves 51 for orderly, make roll up 1 outward appearance of core body more pleasing to the eye, the sealed limit 3 is neat and regular, also fine control sealed limit 3 along radial bounce-back, improve assembly efficiency and assembly yields, it is less simultaneously to stretch first plastic-aluminum membrane 41 and second plastic-aluminum membrane 42, it is little to the leakproofness influence of sealed limit 3, can prevent the weeping, even profile of tooth recess 51 can not occupy the more space of electric core diameter direction, occupation space is little, unit energy density is high, do benefit to the capacity that promotes the battery.
Rectangular positive plate 11 draws forth anodal utmost point ear 21 perpendicularly along the minor face and stretches out from sealed limit 5, rectangular negative pole piece 12 draws forth negative pole utmost point ear 22 perpendicularly along the minor face and stretches out from sealed limit 5, anodal plate 11 and anodal utmost point ear 21 junction cladding have first utmost point ear to glue 31, negative pole piece 12 and negative pole utmost point ear 22 junction cladding have second utmost point ear to glue 32, anodal utmost point ear 21 and negative pole utmost point ear 22 can syntropy also can be backward, as shown in fig. 3, anodal utmost point ear 21 and negative pole utmost point ear 22 are reverse, can select according to actual conditions, and this embodiment is not limited.
The positive electrode tab 21 is an aluminum-to-nickel electrode tab, the negative electrode tab 22 is a nickel electrode tab, the positive electrode tab 21 is connected with the positive electrode plate 11 through welding or riveting or punching, and the negative electrode tab 22 is connected with the negative electrode plate 12 through welding or riveting or punching.
The width of the roll core body 1 is set to 3-8 mm, and the length is set to 50-500 mm, which can be selected according to practical situation, but not limited by the embodiment.
The positive pole tab 21 and the negative pole tab 22 respectively extend towards the two sides of the roll core body 1 and are bent to the same height to be tightly attached to the roll core body 1, so that the volume of the lithium battery can be reduced, and the unit density of the lithium battery can be increased.
The angle between the positive electrode tab 21 and the negative electrode tab 22 is between 0 ° and 180 °, as shown in fig. 3 to 5, the angle between the positive electrode tab 21 and the negative electrode tab 22 is 180 °, which can be selected according to actual conditions, and is not limited in this embodiment.
The utility model discloses an extranal packing effectively reduces the holistic weight of lithium cell for the plastic-aluminum membrane extranal packing, be equipped with the circular arc chamfer on the first plastic-aluminum membrane 41, the side of first plastic-aluminum membrane 41 and the contained angle of rolling up core body 1 axis are between 0-60, be equipped with the circular arc chamfer on the second plastic-aluminum membrane 42, the side of second plastic-aluminum membrane 42 and the contained angle of rolling up core body 1 axis are between 0-60.
The sealing edge 5 provided with the plurality of tooth-shaped grooves 51 is bent towards the axial direction of the winding core body 1, the volume of the lithium battery can be reduced, the unit density of the lithium battery can be increased, the included angle between the sealing edge 5 and the axis of the winding core body 1 is 0-45 degrees, as shown in figure 6, the included angle between the sealing edge 5 and the axis of the winding core body 1 is 0 degree, so that the positive pole lug 21 and the negative pole lug 22 can have larger freedom degree to adapt to smaller precise components and parts, and the application is wider.
Example two
The embodiment of the utility model provides a manufacturing method for making novel flexible package lithium ion battery, including following step:
step S1: manufacturing a pole piece and welding a pole lug, cutting a rectangular positive pole piece 11 and a rectangular negative pole piece 12, vertically welding a positive pole lug 21 at one end of the positive pole piece 11, and vertically welding a negative pole lug 22 at one end of the negative pole piece 12;
step S2: manufacturing a winding core body 1, wherein the winding core body 1 is formed by stacking and winding a rectangular first diaphragm 13, a rectangular negative plate 12, a rectangular second diaphragm 14, a rectangular positive plate 11 and a rectangular third diaphragm 15;
step S3: the tabs are bent, and the positive tab 21 and the negative tab 22 respectively extend towards two sides of the winding core body 1 and are bent to the same height to be tightly attached to the winding core body 1;
step S4: sealing the aluminum-plastic film, namely placing the winding core body 1 between the first aluminum-plastic film 41 and the second aluminum-plastic film 42, and sealing and connecting the first aluminum-plastic film 41 and the second aluminum-plastic film 42 through hot-pressing sealing to form a sealing edge 5;
step S5: injecting, activating and resealing, injecting electrolyte into the interior of the roll core body 1, activating the roll core body 1, and resealing and packaging;
step S6: and stamping and bending the sealing edge, namely stamping the tooth-shaped grooves 51 on the sealing edge 5 through a die, and axially bending the sealing edge 5 provided with a plurality of tooth-shaped grooves 51 towards the winding core body 1.
The manufacturing method is simple to operate, greatly improves the manufacturing efficiency of the lithium battery, and improves the production quality of the lithium battery.
To sum up, the beneficial effects of the utility model reside in that:
be equipped with the profile of tooth recess 51 that a plurality of passes through mould stamping forming on the seal edge 5, seal edge 5 that is equipped with a plurality of profile of tooth recess 51 carries out the axial to rolling up core body 1 and buckles, make seal edge 5 and roll up core body 1 and closely laminate, it can make seal edge 5 contract in order to be equipped with profile of tooth recess 51, it is more pleasing to the eye to make to roll up core body 1 outward appearance, seal edge 5 is neat and regular, also fine control seal edge 5 along radial bounce-back, improve assembly efficiency and assembly yields, it is tensile less to first plastic-aluminum membrane 41 and second plastic-aluminum membrane 42 simultaneously, it is little to seal edge 5's leakproofness influence, can prevent the weeping, even profile of tooth recess 51 can not occupy the more space of electric core diameter direction, occupation space is little, unit energy density is high, do benefit to the capacity that promotes the battery.
Claims (7)
1. The novel flexible package lithium ion battery is characterized by comprising a winding core body (1), wherein the winding core body (1) is formed by stacking and winding a rectangular first diaphragm (13), a rectangular negative plate (12), a second diaphragm (14), a positive plate (11) and a third diaphragm (15), a first aluminum plastic film (41) is wrapped on the upper side of the winding core body (1), a second aluminum plastic film (42) is wrapped on the lower side of the winding core body, a sealing edge (5) is formed between the first aluminum plastic film (41) and the second aluminum plastic film (42) through hot-pressing sealing connection, a plurality of tooth-shaped grooves (51) formed through die stamping are formed in the sealing edge (5), a positive electrode tab (21) is vertically led out along a short edge of the rectangular positive plate (11) and is led out from the sealing edge (5), a negative electrode tab (22) is led out along a vertical short edge of the rectangular negative plate (12) and is led out from the sealing edge (5), the positive plate (11) and the positive pole lug (21) are coated with a first lug glue (31), and the negative plate (12) and the negative pole lug (22) are coated with a second lug glue (32).
2. The novel flexible package lithium ion battery according to claim 1, wherein the positive electrode tab (21) is an aluminum-to-nickel tab, the negative electrode tab (22) is a nickel tab, the positive electrode tab (21) is connected with the positive electrode tab (11) by welding, riveting or punching, and the negative electrode tab (22) is connected with the negative electrode tab (12) by welding, riveting or punching.
3. The novel flexible package lithium ion battery according to claim 1, wherein the width of the winding core body (1) is set to be 3 to 8mm, and the length is set to be 50 to 500 mm.
4. The novel flexible package lithium ion battery according to claim 1, wherein the positive electrode tab (21) and the negative electrode tab (22) respectively extend towards two sides of the winding core body (1) and are bent to the same height to be tightly attached to the winding core body (1).
5. The novel flexible package lithium ion battery according to claim 1, wherein the angle between the positive electrode tab (21) and the negative electrode tab (22) is between 0 ° and 180 °.
6. The novel flexible package lithium ion battery according to claim 1, wherein the first aluminum-plastic film (41) is provided with a circular chamfer, the included angle between the side edge of the first aluminum-plastic film (41) and the axis of the winding core body (1) is 0-60 degrees, the second aluminum-plastic film (42) is provided with a circular chamfer, and the included angle between the side edge of the second aluminum-plastic film (42) and the axis of the winding core body (1) is 0-60 degrees.
7. The novel flexible package lithium ion battery according to claim 1, wherein the sealing edge (5) provided with the plurality of tooth-shaped grooves (51) is bent axially towards the winding core body (1), and an included angle between the sealing edge (5) and the axis of the winding core body (1) is 0-45 degrees.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022702315.4U CN213583901U (en) | 2020-11-20 | 2020-11-20 | Novel flexible package lithium ion battery |
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| CN202022702315.4U CN213583901U (en) | 2020-11-20 | 2020-11-20 | Novel flexible package lithium ion battery |
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| CN213583901U true CN213583901U (en) | 2021-06-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022155855A1 (en) * | 2021-01-21 | 2022-07-28 | 宁德新能源科技有限公司 | Battery cell, battery, and electric device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022155855A1 (en) * | 2021-01-21 | 2022-07-28 | 宁德新能源科技有限公司 | Battery cell, battery, and electric device |
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