CN208637463U - A kind of rectangular winding multi-pole lug lithium ion battery - Google Patents
A kind of rectangular winding multi-pole lug lithium ion battery Download PDFInfo
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- CN208637463U CN208637463U CN201821305377.8U CN201821305377U CN208637463U CN 208637463 U CN208637463 U CN 208637463U CN 201821305377 U CN201821305377 U CN 201821305377U CN 208637463 U CN208637463 U CN 208637463U
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- core
- right sides
- electrode ear
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- welding electrode
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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
Abstract
The utility model relates to a kind of rectangular winding multi-pole lug lithium ion batteries, including the cover board set gradually, mylar film, be flexible coupling piece, core and screening glass, the core lies in the left and right sides of mylar film, the core is equipped with pre- welding electrode ear, the pre- welding electrode ear of the left and right sides core is opposite, the on piece that is flexible coupling is equipped with laser welding position and two ultrasonic welding positions, the pre- welding electrode ear of described two ultrasonic welding positions and left and right sides core corresponds, the laser welding position is connect with cover board, the pre- welding electrode ear upper surface of the left and right sides core is connect with screening glass.The utility model is coated from top to bottom using mylar film, reduces battery weight, saves Material Cost, improves energy density；Enclosure interior height is made full use of, the width of positive/negative plate is increased, improves battery capacity.
Description
Technical field
The utility model relates to technical field of lithium ion, and in particular to a kind of rectangular winding multi-pole ear-lithium ion electricity
Pond.
Background technique
With the guide of national policy, the energy density of power lithium-ion battery is required higher and higher.It is most of at present
Enterprise carries out shell loss of weight processing is thinned, and makes full use of enclosure interior space to improve the energy density of battery.Rectangular cell
Primarily now there are two types of schemes one is full tab design scheme, and another kind is multi pole ears design scheme.Full tab assembling scheme
Be: winding-sizing-core positive and negative anodes enter shell with collector welding (collector is integrated with cover board)-packet insulating film-；Multipole
Ear assembling scheme: positive/negative plate tab cross cutting-winding-sizing-core positive and negative anodes and cover board welding-packet insulating film-enter shell.It passes
The full tab scheme of system is due to simple process, and the dislocation of layer and interlayer since bonding area is big, and when welding causes positive and negative anodes
Coating is left white accounting height, and the effective volume accounting of core is few, the energy of the full tab scheme of same size than multi pole ears scheme
Density is low；Multi pole ears scheme carries out positioning insulation to core using ceiling hold, for the height for protecting the injury-free top-support of tab
It spends higher, headspace is caused to be unable to fully utilize, energy density is promoted difficult.And conventional multipole ear battery top uses soft company
Fold handling after contact pin welding, there is elastic slice support in inside, so the occupied space for the piece that is flexible coupling is larger.
Utility model content
Purpose of the utility model is to overcome the above-mentioned shortcomings and provide a kind of rectangular winding multi-pole lug lithium ion battery,
It is coated from top to bottom using mylar film, reduces battery weight, save Material Cost, improve energy density；It makes full use of in shell
Portion's height increases the width of positive/negative plate, improves battery capacity.
Purpose of the utility model is realized as follows:
A kind of rectangular winding multi-pole lug lithium ion battery, including the cover board, mylar film, the piece that is flexible coupling, core set gradually
And screening glass, the core lie in the left and right sides of mylar film, the core is equipped with pre- welding electrode ear, the left and right sides volume
The pre- welding electrode ear of core is opposite, and the on piece that is flexible coupling is equipped with laser welding position and two ultrasonic welding positions, described two ultrasonic bonds
The pre- welding electrode ear for connecing position and left and right sides core corresponds, and the laser welding position is connect with cover board, the left and right sides volume
The pre- welding electrode ear upper surface of core is connect with screening glass.
Preferably, the mylar film center is equipped with through-hole, places explosion-proof valve, the two sides up and down of the through-hole in the through-hole
Corresponding laser welding position is respectively equipped with notch.
Preferably, the screening glass is limited by locating piece, and the locating piece corresponds to screening glass equipped with groove, the positioning
Location hole is additionally provided on block.
Preferably, there are gap, gap 3-4mm between the pre- welding electrode ear of the left and right sides core.
Preferably, the bottom surface of the pre- welding electrode ear is flushed with the bottom surface of core.
The beneficial effects of the utility model are:
1. top-support is cancelled, coated from top to bottom using mylar film, reduce battery weight, save Material Cost, improved
Energy density；
2. making full use of enclosure interior height, increase the width of positive plate, improves battery capacity and energy density.
Detailed description of the invention
FIG. 1 is a schematic structural view of the utility model.
Fig. 2 is the schematic diagram of piece of being flexible coupling.
Fig. 3 is locating piece schematic diagram.
Fig. 4 is the schematic diagram of mylar film.
Wherein: cover board 1；Mylar film 2；Be flexible coupling piece 3；Core 4；Screening glass 5；Pre- welding electrode ear 6；Laser welding position 7；Ultrasound
Welding position 8；Notch 9；Locating piece 10；Groove 11；Location hole 12；Through-hole 13.
Specific embodiment
Referring to figures 1-4, the utility model relates to a kind of rectangular winding multi-pole lug lithium ion batteries, including what is set gradually
Cover board 1, mylar film 2, the piece 3 that is flexible coupling, core 4 and screening glass 5, the core 4 lies in the left and right sides of mylar film 2, described
Core 4 is equipped with pre- welding electrode ear 6, and the pre- welding electrode ear 6 of the left and right sides core 4 is opposite, and the piece 3 that is flexible coupling is equipped with laser
Welding position 7 and two ultrasonic welding positions 8, described two ultrasonic welding positions 8 and the pre- welding electrode ear 6 one of left and right sides core 4 are a pair of
It answers, the laser welding position 7 is connect with cover board 1, and 6 upper surface of pre- welding electrode ear of the left and right sides core 4 and screening glass 5 connect
It connects.
The pre- welding electrode ear 6 includes prewelding anode ear and prewelding negative electrode lug, and the piece 3 that is flexible coupling is equipped with the first 14 Hes of recess
Second recess 15, there are two second recess 15, is symmetrically distributed between laser welding position 7 and ultrasonic welding position 8, described soft
Connection sheet includes just be flexible coupling piece and the negative piece that is flexible coupling, and two opposite prewelding anode ears and the piece that is just flexible coupling weld, institute
Opposite two prewelding negative electrode lugs and the negative piece welding that is flexible coupling, first recess 14 are stated to protect liquid injection hole in order to prevent, prevent
Liquid injection hole exposes.Second recess 15 of the piece that is just being flexible coupling plays the role of fuse protection, and described bear is flexible coupling the second of piece
Recess 15 is the position in order to expose rotating sheet.
2 center of mylar film is equipped with through-hole 13, places explosion-proof valve, the two sides up and down of the through-hole 13 in the through-hole 13
Corresponding laser welding position 7 is respectively equipped with notch 9.The laser welding position 7 and the welding of cover board 1 are located at notch 9.
The screening glass 5 is limited by locating piece 10, and the corresponding screening glass 5 of the locating piece 10 is equipped with groove 11, described recessed
Slot 11 and 5 clearance fit of screening glass are additionally provided with location hole 12 on the locating piece 10.The location hole 12 plays fixed function.
There are gap, gap 3-4mm between the pre- welding electrode ear 6 of the left and right sides core 4.
The bottom surface of the pre- welding electrode ear 6 is flushed with the bottom surface of core 4.
A kind of assembly method of rectangular winding multi-pole lug lithium ion battery, using the above structure, comprising the following steps:
1), core is formed: passing through heat, cold pressing core sizing；
2), tab prewelding: ultrasonic prewelding is carried out in the end of positive and negative tab；
3), core is matched: being matched two-by-two by automation equipment to core；
4), battery assembles: being sequentially placed cover board, mylar film, the piece that is flexible coupling, pairing core, screening glass, locating piece；
5), cover board welds: laser welding is flexible coupling piece and cover board, and welding position pastes insulating tape；
6), core is welded: ultrasonic welding core and the piece that is flexible coupling, welding position paste insulating tape；
7) it is encapsulated, to close core: two core are combined together packet insulating tape；
8), enter shell.
In the core pairing step that the tab position of two core in left and right is opposite, anode is to anode, and cathode is to cathode.
The lower surface of core tab and the ultrasonic welding position for the piece that is flexible coupling are welded in the core welding step, the core
The upper surface of tab and screening glass weld.
Locating piece in the battery installation step limits screening glass, and the encapsulated step of core is closed after core welding step
Locating piece is removed before rapid.
Embodiment 1: by taking 2614891 size batteries as an example
A kind of rectangular winding multi-pole lug lithium ion battery assembly method, this method specifically includes the following steps:
1. core is formed: by the core of winding by hot press hot pressing, temperature controls 90 DEG C, and the time controls 60s, core
Pressure is 1000kgf；Then cold press is cold-pressed, and temperature controls≤30 DEG C, and the time controls 60s, and core pressure is 1000kgf.
2. tab prewelding: top prewelding of the ultrasonic bonding machine in tab, weld interval 0.2s, bonding power 200W, welding
Depth 20um.
3. core is matched: two core are generally aligned in the same plane first, and two core tabs are opposite, and anode is to anode, cathode
To cathode, two core tabs distance about 4mm, core plane locating for tab is located at core bottom, and the tab that leaks outside always is about 12mm.
4. battery assembles: being sequentially placed cover board, mylar film, be flexible coupling piece, matches core, screening glass, locating piece is (just extremely
Aluminium flake about 0.1mm, cathode are copper sheet about 0.1mm).Wherein screening glass is put into the groove in locating piece Nei and positions to screening glass.
5. cover board welds: laser welding is flexible coupling piece and cover board, bonding power 1200W.
6. core is welded: ultrasonic bonding machine carries out ultrasonic welding, and tab and the piece that is flexible coupling, screening glass are welded simultaneously, welds
It connects and moves back except locating piece, while welding position pastes insulating tape.Bonding power 800W, weld interval 0.3s.
7. it is encapsulated to close core: two core are combined together packet insulating tape.
8. entering shell
After to sum up being assembled by the above method, core height improves 6mm, i.e. positive plate width increases 5mm, and integral battery is held
Amount improves 2.5Ah.
In addition to the implementation, the utility model further includes having other embodiments, all to use equivalents or equivalent
The technical solution that alternative is formed, should all fall within the protection scope of the utility model claims.
Claims (5)
1. a kind of rectangular winding multi-pole lug lithium ion battery, it is characterised in that: including cover board (1), the mylar film set gradually
(2), be flexible coupling piece (3), core (4) and screening glass (5), and the core (4) lies in the left and right sides of mylar film (2), described
Core (4) be equipped with pre- welding electrode ear (6), the pre- welding electrode ear (6) of the left and right sides core (4) relatively, the piece that is flexible coupling (3)
Equipped with laser welding position (7) and two ultrasonic welding positions (8), described two ultrasonic welding positions (8) and left and right sides core (4)
Pre- welding electrode ear (6) correspond, the laser welding position (7) connect with cover board (1), the left and right sides core (4) it is pre-
Welding electrode ear (6) upper surface is connect with screening glass (5).
2. a kind of rectangular winding multi-pole lug lithium ion battery according to claim 1, it is characterised in that: the mylar film
(2) center is equipped with through-hole (13), explosion-proof valve is placed in the through-hole (13), the two sides up and down of the through-hole (13) correspond to Laser Welding
It connects position (7) and is respectively equipped with notch (9).
3. a kind of rectangular winding multi-pole lug lithium ion battery according to claim 1, it is characterised in that: the screening glass
(5) it is limited by locating piece (10), the locating piece (10) corresponding screening glass (5) is equipped with groove (11), the locating piece (10)
On be additionally provided with location hole (12).
4. a kind of rectangular winding multi-pole lug lithium ion battery according to claim 1, it is characterised in that: the left and right sides
There are gap, gap 3-4mm between the pre- welding electrode ear (6) of core (4).
5. a kind of rectangular winding multi-pole lug lithium ion battery according to claim 1, it is characterised in that: the pre- welding electrode ear
(6) bottom surface is flushed with the bottom surface of core (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821305377.8U CN208637463U (en) | 2018-08-14 | 2018-08-14 | A kind of rectangular winding multi-pole lug lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821305377.8U CN208637463U (en) | 2018-08-14 | 2018-08-14 | A kind of rectangular winding multi-pole lug lithium ion battery |
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| Publication Number | Publication Date |
|---|---|
| CN208637463U true CN208637463U (en) | 2019-03-22 |
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ID=65743158
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821305377.8U Active CN208637463U (en) | 2018-08-14 | 2018-08-14 | A kind of rectangular winding multi-pole lug lithium ion battery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108922993A (en) * | 2018-08-14 | 2018-11-30 | 江苏海基新能源股份有限公司 | The rectangular winding multi-pole lug lithium ion battery of one kind and its assembly method |
| CN115441131A (en) * | 2022-11-04 | 2022-12-06 | 江苏正力新能电池技术有限公司 | Membrane, battery core and battery |
-
2018
- 2018-08-14 CN CN201821305377.8U patent/CN208637463U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108922993A (en) * | 2018-08-14 | 2018-11-30 | 江苏海基新能源股份有限公司 | The rectangular winding multi-pole lug lithium ion battery of one kind and its assembly method |
| CN115441131A (en) * | 2022-11-04 | 2022-12-06 | 江苏正力新能电池技术有限公司 | Membrane, battery core and battery |
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