CN207947340U - Electrode slice, battery core with high-energy density and flexible package lithium cell - Google Patents
Electrode slice, battery core with high-energy density and flexible package lithium cell Download PDFInfo
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- CN207947340U CN207947340U CN201820075324.5U CN201820075324U CN207947340U CN 207947340 U CN207947340 U CN 207947340U CN 201820075324 U CN201820075324 U CN 201820075324U CN 207947340 U CN207947340 U CN 207947340U
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- pole piece
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- energy density
- active layer
- battery core
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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 provides the electrode slice with high-energy density, including metal collector and the pole piece active layer being coated in metal collector, it is equipped with the reserved welding section for soldering polar ear at the metal collector at pole piece active layer edge, is equipped at intervals with reserved clear area with the reserved welding section homonymy on the pole piece active layer.General battery pole piece is transferred in the collector welding region of pole piece active layer region exterior inside pole piece active layer region by the electrode slice, exposed afflux body portion is reserved for soldering polar ear in the region close to pole piece edge, lug after welding need not carry out bending process, the space in the wrapping film of lithium battery can not only be made to be fully utilized, and the thickness of dogleg section after tab welding can also be saved as pole piece active layer, to greatly fill active material, the volume energy density of lithium battery is substantially increased.
Description
Technical field
The utility model belongs to technical field of energy storage, and in particular to a kind of electrode slice and flexible package with high-energy density
Lithium battery.
Background technology
Lithium ion battery is distributed in each corner of our lives, and application field includes mobile phone, tablet computer, notes
This computer, smartwatch, mobile power（Charger baby）, emergency power supply, shaver, electric bicycle, electric vehicle, Electric Transit
Vehicle, vista car, unmanned plane and other kinds electric tool.The power resources of carrier and numerous equipment as electric energy,
It can be said that the every aspect of our lives has been permeated in the use of lithium ion battery.
Flexible packing lithium ion battery is the common form of lithium ion battery, and basic component units are internal battery core, outside
The electrolyte of packaging film and responsible lithium ion transport.Wherein, internal battery core is the energy supporting body of lithium ion battery, composition
Positive plate, negative plate, three big component of diaphragm are generally comprised, and positive and negative anodes pole piece respectively contains active ingredient layer and electronics passes
Defeated layer（Collector）.
The collector of positive plate generally selects aluminium foil, essentially consist in its it is high voltage withstanding under oxidation reaction；The collection of negative plate
Fluid generally selects copper foil, essentially consists in the reduction reaction under its resistance to low-voltage；The extraction of battery current generally uses metal pole
The mode of ear and pole piece current collector welding.Since the operability of the preparation process of flexible-packed battery is stronger, so, on the market may be used
The flexible packing lithium ion battery seen is also to come in every shape, but basic structure will not change.
Although flexible packing lithium ion battery can be prepared to variously-shaped specification, examination lithium battery energy size
Standard is constant, is generally marked using the energy size that the lithium battery of unit volume or Unit Weight can be played as measurement
Standard, the i.e. energy density of battery.The Research Emphasis of the lithium ion battery of core force as present battery industry is also to be
Its energy density is improved, including promotes two aspects of mass energy density and volume energy density of battery.
The development trend of current electronic equipment for consumption is light, thin or even some electronic products also need to battery and have spy
Different attribute, such as flexible resist bending, corresponding lithium ion battery can also develop to light, thinning.With thinning, the packaging of battery
The non-active ingredients such as film, lug proportion shared in quality and volume will incrementally increase, and the energy density of battery is caused to reduce,
Even thinning with cell thickness, some original battery structures can all be affected, as shown in Figure 1, in the Soft Roll of thin money
In packed battery, tab welding position will cannot reduce the volume of inactive area by the form of bending again, can only pass through tiling
Mode carry out the extraction of lug, otherwise tab welding position will form the convex top effect in tip to plastic-aluminum packaging film, in addition to electricity
It is pond uneven thickness one, unsightly outer, it is also possible to cause the fatal problems such as packaging film rupture, thus will be reserved in metal collector
Reserved welding section for soldering polar ear is arranged in pole piece active layer outside edges, and the placement but lug once tiles will be to pole
The battery space utilization rate of ear welding direction causes greatly to waste, and the length of about 3~5mm will cannot have because lug tiles
Effect utilizes, so that the volume energy density of battery is by strong influence.
Utility model content
It is placed the purpose of the utility model is to overcome lug tiling in existing thin money soft package lithium battery and increases inactive area
Volume, cause its volume energy density reduce the problem of.
For this purpose, the utility model embodiment provides the electrode slice with high-energy density, including metal collector and painting
Pole piece active layer of the cloth in metal collector is equipped at the metal collector at pole piece active layer edge and is used for soldering polar ear
Reserved welding section, be equipped at intervals with reserved clear area with the reserved welding section homonymy on the pole piece active layer.
Further, the reserved welding section and the reserved clear area are rectangular slot structure.
Further, in the metal collector of the reserved welding section three sides adjacent with the pole piece active layer on one side with
The pole piece active layer connection, another both sides have at regular intervals with the pole piece active layer.
Further, the metal collector is aluminium foil or copper foil.
The utility model embodiment is additionally provided comprising the above-mentioned battery core with high-energy density electrode slice, including positive and negative
Electrode slice, diaphragm and lug, the diaphragm edge are equipped with corresponding with the reserved welding section of positive, negative electrode plate and reserved clear area
Diaphragm notch, the electrode film are superimposed placement with negative electrode plate, and the reserved welding section of electrode film and negative electrode plate is pre-
Leaving a blank, white area is corresponding, and the reserved clear area of electrode film is corresponding with the reserved welding section of negative electrode plate, the diaphragm setting
Between electrode film and negative electrode plate, and two diaphragm notches of the diaphragm and the reserved welding section of positive, negative electrode plate and
Reserved clear area is corresponding, and the tab welding is in the reserved welding section of positive, negative electrode plate.
Further, the edge of the diaphragm exceeds pole piece active layer 1~1.5mm of edge of the positive, negative electrode plate.
Further, the diaphragm gap edge is fixed by tape-stripping.
Further, the tab welding position is wrapped up by tape-stripping.
Further, the positive, negative electrode plate is one or more pairs of.
In addition, the utility model embodiment additionally provides the flexible-packaged lithium electricity with high-energy density battery core comprising above-mentioned
Pond, including battery core, wrapping film and electrolyte, for the electrolyte note in battery core, the battery core is packaged in the wrapping film
It is interior.
Compared with prior art, the beneficial effects of the utility model：It is provided by the utility model this close with high-energy
Collector welding region of the electrode slice of degree by general battery pole piece in pole piece active layer region exterior is transferred to pole piece active layer
Inside region, exposed afflux body portion is reserved for soldering polar ear in the region close to pole piece edge, the lug after welding is not
It needs to carry out bending process, the space in the wrapping film of lithium battery can not only be made to be fully utilized, and can also be by pole
The thickness of dogleg section saves as pole piece active layer after ear welding, to greatly fill active material, significantly
Improve the volume energy density of lithium battery.
The utility model is described in further details below with reference to attached drawing.
Description of the drawings
Fig. 1 is the structural schematic diagram of pole piece in existing flexible package lithium cell；
Fig. 2 is the structural schematic diagram for the electrode slice that the utility model has high-energy density；
Fig. 3 is the core strueture explosive view that the utility model has high-energy density.
Reference sign：1, pole piece active layer；2, welding section is reserved；3, clear area is reserved；4, positive plate；5, diaphragm,
6, negative plate；7, diaphragm notch.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The all other embodiment obtained, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be understood that term "center", "upper", "lower", "front", "rear",
The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on attached drawing institute
The orientation or positional relationship shown, is merely for convenience of describing the present invention and simplifying the description, rather than indicates or imply and is signified
Device or element must have a particular orientation, with specific azimuth configuration and operation, therefore should not be understood as to this practicality
Novel limitation.In the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two or more.
Embodiment 1：
As shown in Fig. 2, present embodiments providing a kind of electrode slice with high-energy density, including metal collector and painting
Pole piece active layer 1 of the cloth in metal collector is equipped with for welding pole at the metal collector at 1 edge of pole piece active layer
The reserved welding section 2 of ear is equipped at intervals with reserved clear area 3 on the pole piece active layer 1 with 2 homonymy of reserved welding section.
The specific preparation process of the electrode slice with high-energy density is as follows：First, the pole piece specification for pressing design, in gold
Belong to coating pole piece active layer 1 on collector and form pole piece, wherein metal collector selects aluminium foil when preparing positive plate, prepares negative
Metal collector selects copper foil when pole piece, while in the coating process, and it is equidistantly pre- that metal collector upper edge is coated with center line
There are several clear areas for being used to prepare reserved welding section 2, and a kind of specific reality that this clear area is formed in coating process
The mode of applying can equidistantly paste several separation layers in certain interval region before the metal collector enters applying area,
Then normal coating pole piece active layer 1 is carried out to metal collector again, specifically, rectangle adhesive tape can be used in the separation layer, it should
The length direction of adhesive tape is consistent with the width direction that metal collector is coated with, and the thickness of adhesive tape can according to the thickness difference of coating
It is adjusted within the scope of 50~200um；After pole piece active layer 1 to be coated is dried, the isolation of stickup is removed before winding
Layer；Then, which is cut by design specification, there are one clear areas for pole piece edge tool after cutting, and in the clear area
It is punched into reserved welding section 2, is advanced optimized, is connect on one side with pole piece active layer 1 in three sides of the reserved welding section 2,
In addition both sides have at regular intervals with pole piece active layer 1, and the bottom edge for specially reserving welding section 2 is connect with pole piece active layer 1, and two
Side respectively has 2.5mm spacing with pole piece active layer 1, will not go out between positive and negative anodes when which can guarantee multipair pole piece superposition
Existing contact short circuit；Finally, according to the lug centre-to-centre spacing distance of design after cutting on pole piece with reserved welding section 2 adjacent one with side
Reserved clear area 3 is punched at set a distance；Further, the reserved welding section 2 and the reserved clear area 3 are square groove
Structure.
Existing connect in the tab welding area of 1 outside edges of pole piece active layer has been guided to pole by electrode slice provided in this embodiment
Inside 1 edge of piece active layer, reserves exposed metal collector part in the region close to pole piece edge and be used for soldering polar ear, this
Sample only needs to occupy 1 ontology small part region of pole piece active layer in tab welding, and subsequent lug may make to weld
It connects and is not necessarily to bending process, in the longitudinal direction, moreover it is possible to the thickness of dogleg section after tab welding be saved and lived as pole piece
Property layer 1 improve its energy density to greatly filling active material.
Embodiment 2：
On the basis of above-described embodiment 1, as shown in figure 3, present embodiments providing the battery core for including above-mentioned electrode slice, wrap
Positive, negative electrode plate, diaphragm 5 and lug are included, 5 edge of the diaphragm is equipped with the reserved welding section 2 with positive, negative electrode plate and leaves a blank in advance
3 corresponding diaphragm notch 7 of white area, the electrode film 4 are superimposed placement, and the reserved welding section of electrode film 4 with negative electrode plate 6
2 is corresponding with the reserved clear area 3 of negative electrode plate 6, the reserved clear area 3 of electrode film 4 and the reserved welding section of negative electrode plate 6
2 is corresponding, and the diaphragm 5 is set between electrode film 4 and negative electrode plate 6, and two diaphragm notches 7 of the diaphragm 5 with
The reserved welding section 2 and reserved clear area 3 of positive, negative electrode plate are corresponding, reserved weldering of the tab welding in positive, negative electrode plate
Meet area 2.
Further, in order to ensure that positive and negative plate can be completely covered in diaphragm 5, the edge of the diaphragm 5 is lived beyond pole piece
Property 1 1~1.5mm of edge of layer, further avoid the contact short circuit of reserved welding section 2 and pole piece active layer 1.
According to the actual demand of required soft package lithium battery to be prepared, multipair positive and negative plate also can be used and carry out according to upper
It states lamination process and carries out lamination.It advanced optimizes, for 5 fringe region of positive and negative plate and 5 lamination metacneme of diaphragm, especially
It is that fringe region corresponding with reserved welding section 2 can be fixed by tape-stripping, further avoids reserved welding section 2 and pole piece
The contact short circuit of active layer 1.Meanwhile after tab welding, the welding position of lug is wrapped up by tape-stripping, is prevented to outsourcing
Dress film punctures and plays the role of further short-circuit protection.
In addition, the present embodiment is additionally provided comprising the above-mentioned flexible package lithium cell with high-energy density battery core, including electricity
Core, wrapping film and electrolyte, in battery core, the battery core is packaged in the wrapping film electrolyte note.
In conclusion this electrode slice with high-energy density provided by the utility model by general battery pole piece in pole
The collector welding region of piece active layer region exterior is transferred to inside pole piece active layer region, in the region close to pole piece edge
Reserved exposed afflux body portion is used for soldering polar ear, and the lug after welding need not carry out bending process, and lithium can not only be made electric
Space in the wrapping film in pond is fully utilized, and can also save the thickness of dogleg section after tab welding
As pole piece active layer the volume energy density of lithium battery is substantially increased to greatly fill active material.
It is exemplified as above be only to the utility model for example, not constituting to the scope of protection of the utility model
Limitation, within every design same or analogous with the utility model all belongs to the scope of protection of the present invention.
Claims (10)
1. the electrode slice with high-energy density, including metal collector and the pole piece active layer that is coated in metal collector,
It is characterized in that：The reserved welding section for soldering polar ear is equipped at the metal collector at pole piece active layer edge, it is described
On pole piece active layer reserved clear area is equipped at intervals with the reserved welding section homonymy.
2. the electrode slice with high-energy density as described in claim 1, it is characterised in that：The reserved welding section and described
Reserved clear area is rectangular slot structure.
3. the electrode slice with high-energy density as claimed in claim 2, it is characterised in that：The metal of the reserved welding section
It is connect on one side with the pole piece active layer in collector three sides adjacent with the pole piece active layer, another both sides are lived with the pole piece
Property layer tool it is at regular intervals.
4. the electrode slice with high-energy density as described in claim 1, it is characterised in that：The metal collector is aluminium foil
Or copper foil.
5. the battery core with high-energy density, it is characterised in that：Including positive, negative electrode plate, diaphragm and lug, the electrode slice are adopted
There is the electrode slice of high-energy density with Claims 1 to 4 any one of them, the diaphragm edge is equipped with and positive and negative electrode
The corresponding diaphragm notch in reserved welding section and reserved clear area of piece, the electrode film are superimposed placement with negative electrode plate, and just
The reserved welding section of electrode slice is corresponding with the reserved clear area of negative electrode plate, the reserved clear area of electrode film and negative electrode plate
Reserved welding section it is corresponding, the diaphragm is set between electrode film and negative electrode plate, and two diaphragms of the diaphragm
Notch is corresponding with the reserved welding section of positive, negative electrode plate and reserved clear area, and the tab welding is in the pre- of positive, negative electrode plate
Stay welding section.
6. the battery core with high-energy density as claimed in claim 5, it is characterised in that：The edge of the diaphragm is beyond described
Pole piece active layer 1~1.5mm of edge of positive, negative electrode plate.
7. the battery core with high-energy density as claimed in claim 5, it is characterised in that：The diaphragm gap edge passes through glue
Band, which is pasted, to be fixed.
8. the battery core with high-energy density as claimed in claim 5, it is characterised in that：The tab welding position passes through glue
Band pastes package.
9. the battery core with high-energy density as claimed in claim 5, it is characterised in that：The positive, negative electrode plate is a pair
Or it is multipair.
10. the flexible package lithium cell with high-energy density, it is characterised in that：It is described including battery core, wrapping film and electrolyte
Battery core has the battery core of high-energy density using claim 5~9 any one of them, and electrolyte note is in battery core, institute
Battery core is stated to be packaged in the wrapping film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820075324.5U CN207947340U (en) | 2018-01-17 | 2018-01-17 | Electrode slice, battery core with high-energy density and flexible package lithium cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820075324.5U CN207947340U (en) | 2018-01-17 | 2018-01-17 | Electrode slice, battery core with high-energy density and flexible package lithium cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207947340U true CN207947340U (en) | 2018-10-09 |
Family
ID=63702040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820075324.5U Active CN207947340U (en) | 2018-01-17 | 2018-01-17 | Electrode slice, battery core with high-energy density and flexible package lithium cell |
Country Status (1)
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| CN (1) | CN207947340U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109786643A (en) * | 2019-02-01 | 2019-05-21 | 江苏烨晨智能科技有限公司 | A kind of battery pole piece positive and negative anodes structure |
| CN115380397A (en) * | 2020-03-30 | 2022-11-22 | 宁德新能源科技有限公司 | Battery assembly, battery using same and electronic device |
| CN117691168A (en) * | 2024-02-04 | 2024-03-12 | 宁德新能源科技有限公司 | Battery cell, secondary battery and electric equipment |
-
2018
- 2018-01-17 CN CN201820075324.5U patent/CN207947340U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109786643A (en) * | 2019-02-01 | 2019-05-21 | 江苏烨晨智能科技有限公司 | A kind of battery pole piece positive and negative anodes structure |
| CN115380397A (en) * | 2020-03-30 | 2022-11-22 | 宁德新能源科技有限公司 | Battery assembly, battery using same and electronic device |
| CN117691168A (en) * | 2024-02-04 | 2024-03-12 | 宁德新能源科技有限公司 | Battery cell, secondary battery and electric equipment |
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