CN209119243U - A kind of stacked wound lithium-ion battery structure - Google Patents
A kind of stacked wound lithium-ion battery structure Download PDFInfo
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- CN209119243U CN209119243U CN201822079203.0U CN201822079203U CN209119243U CN 209119243 U CN209119243 U CN 209119243U CN 201822079203 U CN201822079203 U CN 201822079203U CN 209119243 U CN209119243 U CN 209119243U
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- negative electrode
- pole piece
- diaphragm
- electrode tab
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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 kind of stacked wound lithium-ion battery structure, and each pole piece unit is laminated and is formed by several positive plates, several negative electrode tabs, several short diaphragms；In same pole piece unit, between each adjacent positive plate, negative electrode tab between be separated with short diaphragm, between each two adjacent positive plates between be separated with negative electrode tab, between each adjacent negative electrode tab between be separated with positive plate；Several pole piece units are fitted in the surface of long diaphragm, and two neighboring pole blade unit forms gap on the length direction of long diaphragm, and the long membrane winding for being fitted with pole piece unit forms battery core；It is laminated in battery core between adjacent the two poles of the earth blade unit and is separated by through long diaphragm, and be mutually separated with negative electrode tab between each two adjacent positive plates, be mutually separated with positive plate between each two adjacent negative electrode tabs.The utility model is while meeting high performance lithium ion battery chemical property requirement, the production efficiency problem of cell deformation and raising stack type lithium ion battery after solving the problems, such as existing takeup type structure lithium ion battery winding.
Description
Technical field
The utility model relates to battery technology field more particularly to a kind of stacked wound lithium-ion battery structures.
Background technique
Lithium ion battery has that operating voltage is high, energy density is big, have extended cycle life, self discharge is small, memory-less effect
Advantage has been widely used in various Modern communication devices and field of electronic device.Meanwhile with electric bicycle, electronic vapour
The fast development of vehicle and electric tool, the demand to lithium ion battery is also increasing, to the performance requirement of lithium ion battery
It is higher and higher.
In conventional lithium ion battery winding process, most of batteries also use long pole piece gradually coiled structure, this
Class battery causes the deformation of battery core in long circulating due to the thickness change of pole piece coiling, and various performances and safety is caused to ask
Topic；Most of high performance requirements and high capacity cell also have using stacked technique, complex process, low efficiency simultaneously, and with
The lamination number of plies increase when, production difficulty is gradually increased.So how to meet battery core high performance structural requirement, and can have
High production efficiency is battery structure design focal point.
Utility model content
The purpose of the utility model is to provide a kind of stacked wound lithium-ion battery structures, are meeting high-performance lithium ion
While battery performance requires, solves the problems, such as the cell deformation after existing takeup type structure lithium ion battery is wound and mention
The production efficiency problem of high stack type lithium ion battery.
To achieve the above object, using following technical scheme:
A kind of stacked wound lithium-ion battery structure, including several pole piece units, long diaphragm；If each pole piece unit by
Dry positive plate, several negative electrode tabs, several short diaphragms are laminated to be formed；In same pole piece unit, each adjacent positive plate, negative electrode tab
Between between be separated with short diaphragm, between each two adjacent positive plates between be separated with negative electrode tab, between each adjacent negative electrode tab between be separated with just
Pole piece；Several pole piece units are fitted in the surface of long diaphragm along the length direction of long diaphragm, and two neighboring pole blade unit is in length
Gap is formed on the length direction of diaphragm, the long membrane winding for being fitted with pole piece unit forms battery core；Phase is laminated in the battery core
It is separated by between adjacent the two poles of the earth blade unit through long diaphragm, and is mutually separated with negative electrode tab between each two adjacent positive plates, each adjacent two
Positive plate is mutually separated between negative electrode tab.
Preferably, several pole piece units alternatelies are fitted in the upper and lower surfaces of long diaphragm.
Preferably, several pole piece units are fitted in the upper surface of long diaphragm, or it is fitted in the following table of long diaphragm
Face.
Preferably, the width of the negative electrode tab in same pole piece unit is greater than the width of positive plate, the width of short diaphragm is greater than
The width of negative electrode tab.
Preferably, the width of the negative electrode tab in same pole piece unit is 1~2mm bigger than the width of positive plate, the width of short diaphragm
It spends 2~4mm bigger than the width of negative electrode tab.
Preferably, the gap of two neighboring pole blade unit is sequentially increased along the length direction of long diaphragm on the long diaphragm.
Preferably, the two sides of length direction of several pole piece units along long diaphragm are respectively on a straight line.
It is fixed preferably, sticking gummed paper on the outside of the battery core.
Using the above scheme, the beneficial effects of the utility model are:
1) positive and negative plate of battery core can be divided into pole piece Single Component Management, and the pole piece quantity of pole piece unit can be according to battery core type
Number and actual production control ability depending on, be conducive to production management；
2) pole piece unit is fitted in long membrane surface one by one, facilitates the automatic processing of production and proposing for production efficiency
It rises；
3) pole piece unit is still stacked laminations formula, it can be achieved that stacked high electrochemical performance；It will be fitted with pole piece simultaneously
The long membrane winding of unit forms battery core, can solve the problem on deformation of the wound battery core of long pole piece roll；
4) since the positive and negative plate of entire battery core is divided into blocking management, it can effectively reduce the difficulty of production operation, just
In production operation, production efficiency is improved.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of 1 battery core of embodiment；
Fig. 2 is the structural schematic diagram at the side view angle before 1 electric core winding of embodiment；
Fig. 3 is the structural schematic diagram of the depression angle before 1 electric core winding of embodiment；
Fig. 4 is the structural schematic diagram of 2 battery core of embodiment；
Fig. 5 is the structural schematic diagram at the side view angle before 2 electric core winding of embodiment；
Fig. 6 (a) is the pole piece cellular construction schematic diagram for including a positive plate, a negative electrode tab；
Fig. 6 (b) is the pole piece cellular construction schematic diagram for including two positive plates, a negative electrode tab；
Fig. 6 (c) is the pole piece cellular construction schematic diagram for including a positive plate, two negative electrode tabs；
Fig. 6 (d) is the pole piece cellular construction schematic diagram for including two positive plates, two negative electrode tabs；
Wherein, description of drawing identification:
1-battery core, 11-pole piece units,
12-long diaphragms, 111-positive plates,
112-negative electrode tabs, 113-short diaphragms,
I/I '-first pole piece unit, II/II '-second pole piece unit,
III/III '-third pole piece unit, IV/IV '-quadrupole blade unit,
V/V '-the 5th pole piece unit, VI/VI '-sextupole blade unit,
VII/VII '-the 7th pole piece unit.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
Shown in 6, the utility model provides a kind of stacked wound lithium-ion battery structure, including several poles
Blade unit 11, long diaphragm 12；Each pole piece unit 11 is by several positive plates 111, several negative electrode tabs 112, several 113 layers of short diaphragms
It is folded to be formed；In same pole piece unit 11, between each adjacent positive plate 111, negative electrode tab 112 between be separated with short diaphragm 113, each phase
Be separated with negative electrode tab 112 between two adjacent positive plates 111, between each adjacent negative electrode tab 112 between be separated with positive plate 111；It is described
Several pole piece units 11 are fitted in the surface of long diaphragm 12 along the length direction of long diaphragm 12, two neighboring pole blade unit 11 it is long every
Gap is formed on the length direction of film 12, the winding of long diaphragm 12 for being fitted with pole piece unit 11 forms battery core 1；In the battery core 1
It is laminated between adjacent the two poles of the earth blade unit 11 and is separated by through long diaphragm 12, and be mutually separated with cathode between each two adjacent positive plates 111
Piece 112 is mutually separated with positive plate 111 between each two adjacent negative electrode tabs 112.
Wherein, the width of the negative electrode tab 112 in same pole piece unit 11 is greater than the width of positive plate 111, short diaphragm 113
Width is greater than the width of negative electrode tab 112.The width of negative electrode tab 112 in same pole piece unit 11 is bigger than the width of positive plate 111 by 1
The width of~2mm, short diaphragm 113 are 2~4mm bigger than the width of negative electrode tab 112.Two neighboring pole blade unit 11 on the long diaphragm 12
Gap be sequentially increased along the length direction of long diaphragm 12.Several pole piece units 11 along long diaphragm 12 length direction two
Side is respectively on a straight line.Gummed paper is sticked on the outside of the battery core 1 to fix.
Embodiment 1:
Several pole piece units 11 are alternately fitted in the upper and lower surfaces of long diaphragm 12.
As shown in Fig. 2, from left to right be respectively the first pole piece unit I, the second pole piece unit II, third pole piece unit III,
Quadrupole blade unit IV, the 5th pole piece unit V, sextupole blade unit VI, the 7th pole piece unit VII, seven pole piece units alternatelies
It is fitted in the upper and lower surfaces of long diaphragm 12.
As shown in figure 3, using 6 (b) and the pole piece unit 11 of 6 (c) two kinds of stepped constructions.First pole piece unit I, quadrupole
Blade unit IV, the top layer of the 5th pole piece unit V, lowest level are positive plate 111, the second pole piece unit II, third pole piece list
Member III, sextupole blade unit VI, the top layer of the 7th pole piece unit VII, lowest level are negative electrode tab 112.
It is wound according to winding method shown in FIG. 1, then the positive plate 111 of the top layer of the first pole piece unit I and third pole
The undermost negative electrode tab 112 of blade unit III is separated through long diaphragm 12, the undermost positive plate 111 of the first pole piece unit I with
The undermost negative electrode tab 112 of second pole piece unit II is separated through long diaphragm 12；The anode of the top layer of quadrupole blade unit IV
Piece 111 and the undermost negative electrode tab 112 of the second pole piece unit II are separated through long diaphragm 12, the lowest level of quadrupole blade unit IV
Positive plate 111 and the negative electrode tab 112 of the top layer of sextupole blade unit VI separated through long diaphragm 12；5th pole piece unit V
The positive plate 111 of top layer is separated with the undermost negative electrode tab 112 of the 7th pole piece unit VII through long diaphragm 12, the 5th pole piece list
The undermost positive plate 111 of member V and the negative electrode tab 112 of the top layer of third pole piece unit III are separated through long diaphragm 12.Pole piece
Unit 11 is so distributed, and can satisfy between the two neighboring pole blade unit 11 after stacking winding forms battery core 1 through long 12 phase of diaphragm
Every, and negative electrode tab 112 is mutually separated between every two positive plate 111, positive plate 111 is mutually separated between every two negative electrode tab 112.
Embodiment 2:
Several pole piece units 11 are fitted in the upper surface of long diaphragm 12, or are fitted in the lower surface of long diaphragm 12；I.e.
All pole piece units 11 are fitted in the same surface of long diaphragm 12.
As shown in figure 5, from left to right be respectively the first pole piece unit I ', the second pole piece unit II ', third pole piece unit
III ', quadrupole blade unit IV ', the 5th pole piece unit V ', sextupole blade unit VI ', the 7th pole piece unit VII ', then after winding
Form battery core 1 as shown in Figure 4.
Utility model works principle:
In the utility model, the diaphragm in each pole piece unit between positive plate and negative electrode tab is known as short diaphragm, for pasting
It closes several pole piece units and winds and form the diaphragm of battery core and be known as long diaphragm.It, can be by pole piece unit as schemed in the utility model
2, it is fitted in shown in 5 on long diaphragm, but is not limited only to both bonding structures.To be fitted with the long diaphragm of pole piece unit according to
Fig. 1,4 mode be wound, there was only long diaphragm in the corner of winding, without pole piece unit, effectively solve battery core 1 and deform
Problem.
Pole piece unit 11 can be there are many stepped construction:
As shown in Fig. 6 (a): short 113/ negative electrode tab 112 of diaphragm of positive plate 111/
As shown in Fig. 6 (b): 111/ short 113/ positive plate 111 of diaphragm of short 113/ negative electrode tab of diaphragm 112/ of positive plate
As shown in Fig. 6 (c): 112/ short 113/ negative electrode tab 112 of diaphragm of short 113/ positive plate of diaphragm 111/ of negative electrode tab
As shown in Fig. 6 (d): short 113/ negative electrode tab of diaphragm, the 112/ short diaphragm of short 113/ positive plate of diaphragm 111/ of positive plate 111/
113/ negative electrode tab 112
And so on, if meet in same pole piece unit 11, between each adjacent positive plate 111, negative electrode tab 112 between
Be separated with short diaphragm 113, between each two adjacent positive plates 111 between be separated with negative electrode tab 112, between each adjacent negative electrode tab 112 between
It is separated with positive plate 111；Pole piece unit 11 can be laminated according to this rule: ... short 113/ positive plate of diaphragm of negative electrode tab 112/
The mode of 111/ short 113/ positive plate 111 ... of diaphragm of short 113/ negative electrode tab of diaphragm 112/ is laminated, and forms pole piece list one by one
Member 11.
The quantity of the positive plate 111, negative electrode tab 112 that are laminated in each pole piece unit 11 can be according to the concrete model of battery core 1
And depending on capacity, or the case where according to production equipment；When spooling length need to be lengthened, the quantity of stacking pole piece can be reduced；When need
When shortening spooling length, the quantity of stacking pole piece can be increased, flexibly and easily.
The stepped construction of pole piece unit 11 in same battery core 1 can be identical or different, the stacking pole piece of pole piece unit 11
Number can also be identical or different.However, it is desirable to guarantee in same pole piece unit 11, each adjacent positive plate 111, negative electrode tab
Be separated with short diaphragm 113 between 112, between each two adjacent positive plates 111 between be separated with negative electrode tab 112, each adjacent negative electrode tab
Positive plate 111 is separated between 112.
Several pole piece units 11 are respectively on a straight line along the two sides of the length direction of long diaphragm 12, i.e. guarantee pole piece list
The position that member 11 is fitted on long diaphragm 12 is smooth, and edge is in same horizontal line.
The battery structure of the utility model makes with the following method:
1) by positive plate 111, negative electrode tab 112 and short diaphragm 113 according to gauge size punching, wherein negative electrode tab 112 should compare
The wide about 1~2mm of positive plate 111, short diaphragm 113 should be 2~4mm wider than negative electrode tab 112, with it is instant rolled around；
2) by all made pole pieces respectively according to " ... the 112/ short diaphragm 113/ of short 113/ positive plate of diaphragm 111/ of negative electrode tab
The mode of short 113/ positive plate 111 ... of diaphragm of negative electrode tab 112/ " is folded to form pole piece unit 11 one by one, the thickness and number of stacking
Amount is calculated according to the thickness and capacity of practical battery core 1；
3) the good pole piece unit 11 of above-mentioned stacking is successively fitted in long 12 surface of diaphragm and (is fitted in long 12 surface of diaphragm
When, should ensure that positive plate 111 when being wound into battery core 1, negative electrode tab 112 are spaced apart)；
4) the above-mentioned long diaphragm 12 for being fitted with pole piece unit 11 is wound up, flattens battery core 1, sticks fixed gummed paper, it is complete
It is made at battery core 1.
The above is only the preferred embodiments of the present utility model only, is not intended to limit the utility model, all practical at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the guarantor of the utility model within novel spirit and principle
Within the scope of shield.
Claims (8)
1. a kind of stacked wound lithium-ion battery structure, which is characterized in that including several pole piece units, long diaphragm；Each pole
Blade unit is laminated and is formed by several positive plates, several negative electrode tabs, several short diaphragms；In same pole piece unit, it is each it is adjacent just
Be separated with short diaphragm between pole piece, negative electrode tab, between each two adjacent positive plates between be separated with negative electrode tab, each adjacent negative electrode tab it
Between between be separated with positive plate；Several pole piece units are fitted in the surface of long diaphragm, two neighboring pole along the length direction of long diaphragm
Blade unit forms gap on the length direction of long diaphragm, and the long membrane winding for being fitted with pole piece unit forms battery core；The electricity
It is laminated on core between adjacent the two poles of the earth blade unit and is separated by through long diaphragm, and be mutually separated with negative electrode tab between each two adjacent positive plates,
Positive plate is mutually separated between each two adjacent negative electrode tabs.
2. stacked wound lithium-ion battery structure according to claim 1, which is characterized in that several pole piece units
Alternating is fitted in the upper and lower surfaces of long diaphragm.
3. stacked wound lithium-ion battery structure according to claim 1, which is characterized in that several pole piece units
It is fitted in the upper surface of long diaphragm, or is fitted in the lower surface of long diaphragm.
4. stacked wound lithium-ion battery structure according to claim 2 or 3, which is characterized in that same pole piece unit
In the width of negative electrode tab be greater than the width of positive plate, the width of short diaphragm is greater than the width of negative electrode tab.
5. stacked wound lithium-ion battery structure according to claim 4, which is characterized in that in same pole piece unit
The width of negative electrode tab is 1~2mm bigger than the width of positive plate, and the width of short diaphragm is 2~4mm bigger than the width of negative electrode tab.
6. stacked wound lithium-ion battery structure according to claim 2 or 3, which is characterized in that on the long diaphragm
The gap of two neighboring pole blade unit is sequentially increased along the length direction of long diaphragm.
7. stacked wound lithium-ion battery structure according to claim 2 or 3, which is characterized in that several pole pieces
Unit is respectively on a straight line along the two sides of the length direction of long diaphragm.
8. stacked wound lithium-ion battery structure according to claim 1, which is characterized in that sticked on the outside of the battery core
Gummed paper is fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822079203.0U CN209119243U (en) | 2018-12-10 | 2018-12-10 | A kind of stacked wound lithium-ion battery structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822079203.0U CN209119243U (en) | 2018-12-10 | 2018-12-10 | A kind of stacked wound lithium-ion battery structure |
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| Publication Number | Publication Date |
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| CN209119243U true CN209119243U (en) | 2019-07-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113140780A (en) * | 2020-01-22 | 2021-07-20 | 钟浪均 | Fold formula of book electricity core and lithium ion battery |
| CN114243119A (en) * | 2021-11-24 | 2022-03-25 | 无锡先导智能装备股份有限公司 | Lamination method of battery cell |
-
2018
- 2018-12-10 CN CN201822079203.0U patent/CN209119243U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113140780A (en) * | 2020-01-22 | 2021-07-20 | 钟浪均 | Fold formula of book electricity core and lithium ion battery |
| CN114243119A (en) * | 2021-11-24 | 2022-03-25 | 无锡先导智能装备股份有限公司 | Lamination method of battery cell |
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