CN105990612A - Electrical core - Google Patents
Electrical core Download PDFInfo
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- CN105990612A CN105990612A CN201510060477.3A CN201510060477A CN105990612A CN 105990612 A CN105990612 A CN 105990612A CN 201510060477 A CN201510060477 A CN 201510060477A CN 105990612 A CN105990612 A CN 105990612A
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- Prior art keywords
- lug
- pole piece
- clear area
- collector
- 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 invention provides an electrical core. The electrical core comprises a first pole piece containing a first current collector and a first diaphragm; a first tab; a second pole piece containing a second current collector and a second diaphragm; a second tab; and an isolated film. According to the invention, at least one surface of the first current collector has a part which is unequipped with the first diaphragm, wherein the part is defined as a first surface blank area, the first surface blank area is formed by removing the first diaphragm arranged on a corresponding part on the surface of the first current collector; at least one surface of the second current collector has the part which is unequipped with the second diaphragm, wherein the part is defined as a second surface blank area, the second surface blank area is formed by removing the second diaphragm arranged on the corresponding part on the surface of the second current collector; and the first tab and the second tab are respectively arranged in the first surface blank area and the second surface blank area. The first pole piece is the anode pole piece or the cathode pole piece, the second pole piece is the cathode pole piece or the anode pole piece; and the anode pole piece is inserted into an end part of the electrical core during a reeling process.
Description
Technical field
The present invention relates to energy storage device field, particularly relate to a kind of battery core.
Background technology
Lithium ion battery has been widely used in each electronic product, along with electronic product tend to miniaturization,
Intelligent development, energy density and thickness to lithium ion battery have higher requirement, and this is accomplished by
More likely many energy are contributed in less volume.But traditional lithium ion battery is due to lug thickness
And it being covered on lug the superposition of the green glue thickness that insulate so that lug district becomes the maximum gauge of battery
District, causes the battery core dimensional space beyond lug district to be wasted, and lug also occupies bigger on pole piece
Region so that can coat active substance area reduce.Additionally, current winding process Anodic pole piece
Head all can not be inserted into battery core end, causes the effective dimensions space within battery core to can not get effective profit
With.
On October 17th, 2012, the Chinese patent Authorization Notice No. of Granted publication was 202495523 U
Patent documentation disclose a kind of lithium ion battery and pole piece thereof, it uses on the pole piece one end of Yin/Yang pole
Offer groove, make lug embed in the groove cavities that Yin/Yang pole pole piece groove is collectively forming, decrease lug
Battery core thickness is added up.But its lug still takies larger area on pole piece, reduces fluting efficiency
And cause the area that can coat active substance on pole piece to reduce；And winding time anode pole piece head distance
Battery core end 3.5～4.5mm, the internal effective dimensions space of battery core is not yet utilized effectively.Additionally, should
The cathode sheet district that structure Anodic pole piece groove described in patent is corresponding with cathode sheet groove does not pastes absolutely
The green glue of edge, there is internal short-circuit and analysis lithium risk in battery core.
On July 23rd, 2014, the Chinese patent Authorization Notice No. of Granted publication was CN 203733894 U
Patent documentation disclose a kind of lithium ion battery, it uses offers groove in the middle part of the pole piece of Yin/Yang pole, makes
Lug is respectively embedded in the groove of anode and cathode pole piece, it is achieved reduces lug and adds up the thickness of battery core, in addition
Also use and paste the green glue of insulation in the cathode sheet district that cathode tab upper and lower surface and anode lug are corresponding
Reduce the generation of internal short-circuit.Although this patent solves internal short-circuit and the problem of analysis lithium risk, but this is special
The green gluing active material layer having covered lug near zone of insulation pasted in profit, thus reduce work
The effective area of property material layer, and the area of this patent further groove is the biggest.In addition belonging to this patent
Battery core is anode pole piece head distance battery core end 3.5～4.5mm when winding, and the internal effective dimensions of battery core is empty
Between be not utilized effectively too.
Summary of the invention
In view of problem present in background technology, it is an object of the invention to provide a kind of battery core, it can carry
The capacity of high battery core and volume energy density
To achieve these goals, the invention provides a kind of battery core, comprising: the first pole piece, including
First collector and the first film containing the first active material being arranged on the surface of the first collector
Sheet；First lug, is electrically connected to the first collector of the first pole piece；Second pole piece, with the first pole piece pole
Property contrary, including the second collector and be arranged on the second collector surface on containing the second activity material
The secondary diaphragm of material；Second lug, is electrically connected to the second collector of the second pole piece；And isolating membrane,
It is arranged between the first pole piece and the second pole piece；Wherein, the first pole piece, isolating membrane and the second pole piece are sequentially
Winding forms battery core.At least one surface of first collector exist be not provided with primary diaphragm part and
This part is defined as first surface clear area, and first surface clear area is arranged on the first collector via removing
Surface on the primary diaphragm of corresponding part and formed；At least one surface existence of the second collector does not sets
The part and this part that are equipped with secondary diaphragm are defined as second surface clear area, second surface clear area via
Remove and be arranged on the secondary diaphragm of corresponding part on the surface of the second collector and formed；First lug is arranged
In first surface clear area and be electrically connected to first surface clear area, the thickness of the first lug is less than or equal to
The thickness of primary diaphragm；In second lug is arranged at second surface clear area and to be electrically connected to first surface empty
White area, the thickness of the second lug is less than or equal to the thickness of secondary diaphragm.First pole piece is anode pole piece or the moon
Pole pole piece, correspondingly the second pole piece is cathode sheet or anode pole piece；First lug is anode lug or the moon
Pole lug, correspondingly the second lug is cathode tab or anode lug；First active material is anode activity
Material or active material of cathode, correspondingly the second active material is active material of cathode or anode activity material
Material；Primary diaphragm is anode diaphragm or negative electrode diaphragm, and correspondingly secondary diaphragm is negative electrode diaphragm or anode film
Sheet；First collector is anode collector or cathode current collector, and correspondingly the second collector is cathode collector
Body or anode collector；First surface clear area is anode clear area or negative electrode clear area, correspondingly second
Clear area, surface is negative electrode clear area or anode clear area；Anode pole piece is at winding process Anodic pole piece
Head is inserted to the end of battery core.
Beneficial effects of the present invention is as follows:
According in the battery core of the present invention, anode pole piece is inserted to electricity at the head of winding process Anodic pole piece
The end of core, thus utilize the effective dimensions space within battery core more fully, make capacity and the body of battery core
Long-pending energy density is promoted further.
Accompanying drawing explanation
Fig. 1 is the side view of an embodiment of the battery core according to the present invention；
Fig. 2 is the structural representation of the first tab welding of an embodiment of the battery core according to the present invention；
Fig. 3 is the structural representation of the first tab welding of the battery core of the alternate embodiment of Fig. 2；
Fig. 4 is the structural representation of the first tab welding of the battery core of another alternate embodiment of Fig. 2；
Fig. 5 is the magnified partial view in the first lug region of another embodiment of the battery core according to the present invention；
Fig. 6 is the structural representation of the first lug bonding of another embodiment of the battery core according to the present invention；
Fig. 7 is the structural representation of the first tab welding of the battery core of a comparative example of the present invention；
Fig. 8 is the side view of the battery core of a comparative example of the present invention.
Wherein, description of reference numerals is as follows:
1 first pole piece S solder joint
11 first collector 4 second lugs
111 first surface clear area 5 isolating membrane
12 primary diaphragm 6 first insulating cements
2 first lug 7 second insulating cements
3 second pole piece L length directions
31 second collector W widths
311 second surface clear area T thickness directions
32 secondary diaphragms
Detailed description of the invention
Describe the battery core according to the present invention with reference to the accompanying drawings in detail.
Referring to figs. 1 through Fig. 7, include according to the battery core of the present invention: the first pole piece 1, including the first afflux
Body 11 and be arranged on the primary diaphragm containing the first active material on the surface of the first collector 11
12；First lug 2, is electrically connected to the first collector 11 of the first pole piece 1；Second pole piece 3, with
One pole piece 1 opposite polarity, including the second collector 31 and be arranged on the second collector 31 surface on
The secondary diaphragm 32 containing the second active material；Second lug 4, is electrically connected to the of the second pole piece 3
Two collectors 31；And isolating membrane 5, it is arranged between the first pole piece 1 and the second pole piece 3；Wherein,
First pole piece 1, isolating membrane 5 and the second pole piece 3 sequentially wind formation battery core.First collector 11 is extremely
A few surface exist be not provided with the part of primary diaphragm 12 and this part to be defined as first surface blank
District 111, first surface clear area 111 is via removing correspondence portion on the surface being arranged on the first collector 11
Point primary diaphragm 12 and formed；At least one surface existence of the second collector 31 is not provided with second
The part of diaphragm 32 and this part are defined as second surface clear area 311, second surface clear area 311 warp
Formed by the secondary diaphragm 32 removing corresponding part on the surface being arranged on the second collector 31；First
In lug 2 is arranged at first surface clear area 111 and be electrically connected to first surface clear area 111, first
The thickness of lug 2 is less than or equal to the thickness of primary diaphragm 12；It is empty that second lug 4 is arranged at second surface
In white area 311 and be electrically connected to first surface clear area 111, the thickness of the second lug 4 is less than or equal to the
The thickness of two diaphragms 32.First pole piece 1 is anode pole piece or cathode sheet, correspondingly the second pole piece 3
For cathode sheet or anode pole piece；First lug 2 is anode lug or cathode tab, correspondingly the second pole
Ear 4 is cathode tab or anode lug；First active material is active material of positive electrode or active material of cathode,
Correspondingly the second active material is active material of cathode or active material of positive electrode；Primary diaphragm 12 is anode
Diaphragm or negative electrode diaphragm, correspondingly secondary diaphragm 32 is negative electrode diaphragm or anode diaphragm；First collector
11 is anode collector or cathode current collector, and correspondingly the second collector 31 is cathode current collector or anode
Collector；First surface clear area 111 is anode clear area or negative electrode clear area, correspondingly second surface
Clear area 311 is negative electrode clear area or anode clear area；Anode pole piece is at winding process Anodic pole piece
Head is inserted to the end of battery core.
According in the battery core of the present invention, anode pole piece is inserted to electricity at the head of winding process Anodic pole piece
The end of core, (with reference to Fig. 1, compared to the battery core shown in Fig. 8 comparative example, anode pole piece was winding
The head of journey Anodic pole piece can not be inserted to the end of battery core, can only be inserted to the middle part of battery core) thus more fill
Divide the effective dimensions space of land productivity electricity consumption core inner, make the capacity of battery core and volume energy density be entered one
Step promotes.And, the internal resistance (DCR) of the battery core of the present invention significantly reduces.
Firstly, it is necessary to explanation, the length of each parts of the present invention refers to the length direction of each parts
Distance on L, the width of each parts refers to the distance on the length direction W of each parts, each parts
Thickness refers to the distance on the thickness direction T of each parts.
In an embodiment of the battery core according to the present invention, the first lug 2 and first surface clear area 111
The first area being electrically connected can be 1～30mm2, the area of first surface clear area 111 can be
1～15 times of one area；Second lug 4 and second surface clear area 311 be electrically connected second
Area can be 1～30mm2, the area of second surface clear area 311 can be 1～15 times of second area.
In an embodiment of the battery core according to the present invention, the length of first surface clear area 111 and second
The length of clear area, surface 311 can be respectively the 0.5%～40% of the width of battery core.
In an embodiment of the battery core according to the present invention, the width of first surface clear area 111 is first
The 1/4～3/4 of the width of pole piece 1；The width of second surface clear area 311 is the width of the second pole piece 3
1/4～3/4.
In an embodiment of the battery core according to the present invention, first surface clear area 111 can be moved via laser
Except or machinery remove the primary diaphragm 12 of corresponding part on the surface being arranged on the first collector 11 and shape
Become；Second surface clear area 311 can remove via laser or machinery removes and is arranged on the second collector 31
Surface on the secondary diaphragm 32 of corresponding part and formed.The present invention can make first surface clear area 111
It is greatly reduced with the area of second surface clear area 311, the most just increases primary diaphragm 12 and second
The area of diaphragm 32, thus improve capacity and the volume energy density of battery core, improve first simultaneously
Clear area, surface 111 and second surface clear area 311 remove efficiency, thus improve the production effect of battery core
Rate.
In an embodiment of the battery core according to the present invention, with reference to Fig. 1, the first lug 2 and first surface
Clear area 111 can be electrically connected by welding；Second lug 4 and second surface clear area 311
Can be electrically connected by welding.In one embodiment, welding can be ultra-sonic welded.
In an embodiment of the battery core according to the present invention, with reference to Fig. 1, two tables of the first collector 11
There is the part being not provided with primary diaphragm 12 in face, thus form two first surfaces in relative position
Clear area 111, be disposed therein one of the first lug 2；Two surfaces of the second collector 31 are in phase
To position exist and be not provided with the part of secondary diaphragm 32, thus form two second surface clear areas
311, be disposed therein one of the second lug 4.Specifically, with two first surface clear areas 111
As a example by, during ultra-sonic welded the first lug 2, the first lug is welded in a first surface clear area 111
2, another first surface clear area 111 supports weld nest, in other words, two first surface skies
White area 111 is to be confined to current Ultrasonic welding processes, and the present invention is not restricted to necessarily be formed two
First surface clear area 111.Similarly, second surface clear area 311 is also such, no longer describes.
In an embodiment of the battery core according to the present invention, counting of solder joint S can be 1～6 (Fig. 1,
In example shown in Fig. 2, Fig. 3, solder joint S counts respectively 1,2,3).Work as solder joint
When counting more than 1 of S, with reference to Fig. 3 and Fig. 4, the solder joint S W in the width direction of ultra-sonic welded can
It is arranged in parallel.In one embodiment, the spacing between each solder joint S is on width W can be
0.05mm～4mm.
In an embodiment of the battery core according to the present invention, the length of each solder joint S is respectively than the first lug 2
With little 0.05mm～10mm of length of the second lug 4, the width of each solder joint S is 1mm～8mm.
Relative to prior art, The present invention reduces the counting and shorten solder joint of solder joint S of ultra-sonic welded
Spacing between S.
In an embodiment of the battery core according to the present invention, with reference to Fig. 5 and Fig. 6, the first lug 2 and the
One clear area, surface 111 can be electrically connected by bonding；Second lug 4 is blank with second surface
District 311 can be electrically connected by bonding.With above when being electrically connected by welding not
With, when being electrically connected by bonding, first surface clear area 111 and second surface clear area 311
It is one, therefore, further increases primary diaphragm 12 and the area of secondary diaphragm 32, thus carry
The capacity of high battery core and volume energy density, improve first surface clear area 111 and the second table simultaneously
Clear area, face 311 remove efficiency, thus improve the production efficiency of battery core.
In one embodiment, bonding can use conducting resinl.In one embodiment, the length of conducting resinl is respectively
Than the first lug 2 and little 2mm～10mm of length of the second lug 4, the width ratio of conducting resinl ratio the respectively
One lug 2 and little 1mm～5mm of width of the second lug 4.
In an embodiment of the battery core according to the present invention, conducting resinl can mainly by organic siliconresin matrix,
Silicone matrix, epoxy resin-base or polymerization species matrix and metallic fiber or metallic particles composition.
In one embodiment, metallic particles can be at least one in Ag, Cu, Au, Ni.
In an embodiment of the battery core according to the present invention, bonding low-melting-point metal or low melting point is used to close
Gold.In one embodiment, low-melting-point metal can be at least one in stannum, lead, zinc, antimony, bismuth；Low
Melting alloy can be the alloy that at least two in stannum, lead, zinc, antimony, bismuth is formed.Preferably, eutectic
Point alloy can be sn-bi alloy.
In an embodiment of the battery core according to the present invention, the length of low-melting-point metal or low-melting alloy can
Respectively than the first lug 2 and little 1mm～5mm of length of the second lug 4；Low-melting-point metal or low melting point
The width of alloy can be respectively than the first lug 2 and little 1mm～5mm of width of the second lug 4.
In an embodiment of the battery core according to the present invention, with reference to Fig. 1 and Fig. 5, battery core may also include that
First insulating cement 6, be covered in the first lug 2 in the face of the surface of the second pole piece 3；Second insulating cement 7,
Be covered in the second lug 4 in the face of the surface of the first pole piece 1.At this it should be noted that work as the first pole
Ear 2 can be electrically connected by welding with first surface clear area 111, the second lug 4 and second
Clear area, surface 311 can be electrically connected by welding, and there are two first surface clear areas 111
During with two second surface clear areas 311, as a example by two first surface clear areas 111, the first insulation
Glue 6 be not only covered in the first lug 2 in the face of the surface of the second pole piece 3, (the i.e. first insulating cement 6 covers
A first surface clear area 111 being provided with the first lug 2), meanwhile, another first surface
Also be covered with the first insulating cement 6 on clear area 111, thereby guarantee that the first pole piece 1 and the second pole piece 3 it
Between insulate, it is to avoid battery core exist internal short-circuit and analysis lithium risk.Similarly, second surface clear area 311
Also such, it is not discussed herein.When in one embodiment, the first insulating cement 6 and the second insulating cement 7 can
For the green glue that insulate.
In an embodiment of the battery core according to the present invention, with reference to Fig. 1 and Fig. 5, the first insulating cement 6
Length and width is identical with the length and width of the first insulating cement 6, and first surface clear area is completely covered
111；The length and width of the second insulating cement 7 is identical and complete with the length and width of the second insulating cement 7
All standing second surface clear area 311.First insulating cement 6 and the second insulating cement 7 are only completely covered first
Clear area, surface 111 and second surface clear area 311, viscous screening first surface clear area 111 and second
The primary diaphragm 12 of both sides, clear area, surface 311 and secondary diaphragm 32, so that the thickness of battery core is able to
Reduce.
The embodiment of the battery core according to the present invention, comparative example, test process and test result are described below.
Embodiment 1
With 423482 model flexible packing lithium ion batteries (finished product battery core thickness as 4.2mm, width be
34mm, a length of 82mm) as a example by, the anode lug of battery and cathode tab consistent size, i.e. two
The a length of 30mm of lug, width are 4mm, thickness is 0.06mm, and length direction has 13mm to weld
It is connected on pole piece.
(on anode pole piece, the thickness of single layer anode diaphragm is 67 μm, negative electrode to pole piece after cold pressing process
On pole piece, the thickness of monolayer cathodes diaphragm is 53 μm), use laser mode at the 1/2 of the width of each pole piece
It is 224mm that diaphragm is cleaned and wash out the gross area by place2Clear area, two-sided surface, wherein monoplanar surface
The width of clear area is 8mm, a length of 14mm, by tab welding clear area, surface on a face,
Lug total solder joint area is 24mm2, pad is 2, single a length of 4mm of solder joint, single solder joint width
It is 1.5mm for 3mm, solder joint spacing in the direction of the width.The green glue cathode tab that insulate and another
The clear area, surface of the clear area, surface in face, anode lug and another side.Cathode sheet, anode pole piece and
Isolating membrane winding and the end that anode pole piece head is battery core side.
Embodiment 2
With embodiment 1, divided by lower and embodiment 1 difference:
Anode lug and cathode tab length direction have 7mm to be welded on pole piece.Use mechanical cleaning side
It is 128mm that diaphragm is cleaned and wash out the gross area at the 1/2 of the width of pole piece by formula2Two-sided surface
Clear area, wherein the width of monoplanar surface clear area be 8mm, a length of 8mm, by tab welding in
In clear area, surface, lug total solder joint area is 12mm2, pad is 1, single a length of 4mm of solder joint,
Single solder joint width is 3mm.
Embodiment 3
With embodiment 1, divided by lower and embodiment 1 difference:
Anode lug consists of polymeric matrix and silver fiber 7mm with cathode tab length direction
Conducting resinl is bonded on pole piece.Laser cleaning mode is used to clean also at 1/2 pair of diaphragm of the width of pole piece
Washing out the gross area is 64mm2Monoplanar surface clear area, wherein the width of monoplanar surface clear area is
8mm, a length of 8mm, be bonded in clear area, surface by lug by conducting resinl, and lug bond area is
28mm2, a length of 7mm of conducting resinl, the width of conducting resinl is 4mm.
Embodiment 4
With embodiment 1, divided by lower and embodiment 1 difference:
Anode lug and cathode tab length direction have 7mm to be bonded in by low-melting alloy-sn-bi alloy
On pole piece.Laser cleaning mode is used to clean at 1/2 pair of diaphragm of the width of pole piece and wash out the gross area
For 64mm2Monoplanar surface clear area, wherein the width of monoplanar surface clear area is 8mm, a length of
8mm, is bonded in clear area, surface by lug by low-melting alloy-sn-bi alloy, and lug bond area is
28mm2, a length of 7mm of sn-bi alloy, the width of sn-bi alloy is 4mm.
Comparative example
With 423482 model flexible packing lithium ion batteries (finished product battery core thickness as 4.2mm, width be
34mm, a length of 82mm) as a example by, galvanic anode lug is long with cathode tab consistent size, i.e. lug
Degree is 45mm, width is 4mm, thickness is 0.06mm, and length direction has 25mm to be welded on pole
On sheet.
(on anode pole piece, the thickness of single layer anode diaphragm is monolayer cathodes on 64 μm, cathode sheet to pole piece
The thickness of diaphragm is 51 μm) after cold pressing process diaphragm without cleaning on pole piece to form surface blank
District, but the surface of the part being not provided with diaphragm directly tab welding reserved at the collector of pole piece
On, pad is 3, single a length of 4mm of solder joint, single solder joint width are 3mm, spot pitch is
4mm.The core strueture of cathode sheet, anode pole piece and isolating membrane winding is traditional core strueture,
With reference to Fig. 7 and Fig. 8.
The battery of embodiment 1-4 and comparative example gained is carried out capacity and volume energy density test, thickness
And D.C. resistance (DCR) measurement.
Volume test: use nominal current battery core to be charged to nominal upper limit voltage, the most again with nominal electricity
Stream discharges into the electricity discharged by voltage.
Volume energy density is tested: (capacity * nominal voltage)/volume.
Thickness measuring: measure with PPG calibrator.
D.C. resistance DCR measures: first uses 0.1C electric discharge 10s, then uses 1C electric discharge 1s, by this
The voltage difference of two sections/difference between current calculates and obtains.
Wherein, each embodiment, comparative example respectively use 500 batteries to test, the test result of gained
It is shown in table 1.
The test result of the battery of table 1 embodiment 1-4 and comparative example
As can be seen from Table 1, average size and the average volume energy density of embodiment 1-4 compares comparative example
All have a distinct increment；DCR is the most relatively small.
Claims (10)
1. a battery core, including:
First pole piece (1), including the first collector (11) and be arranged on the first collector (11)
Surface on the primary diaphragm (12) containing the first active material；
First lug (2), is electrically connected to first collector (11) of the first pole piece (1)；
Second pole piece (3), and the first pole piece (1) opposite polarity, including the second collector (31) with
And the secondary diaphragm (32) containing the second active material being arranged on the surface of the second collector (31)；
Second lug (4), is electrically connected to second collector (31) of the second pole piece (3)；And
Isolating membrane (5), is arranged between the first pole piece (1) and the second pole piece (3)；
Wherein, the first pole piece (1), isolating membrane (5) and the second pole piece (3) sequentially wind formation electricity
Core；
There is the part being not provided with primary diaphragm (12) at least one surface of the first collector (11)
And this part is defined as first surface clear area (111), first surface clear area (111) are via removing
It is arranged on the primary diaphragm (12) of corresponding part on the surface of the first collector (11) and is formed；
There is the part being not provided with secondary diaphragm (32) at least one surface of the second collector (31)
And this part is defined as second surface clear area (311), second surface clear area (311) are via removing
It is arranged on the secondary diaphragm (32) of corresponding part on the surface of the second collector (31) and is formed；
First lug (2) is arranged in first surface clear area (111) and to be electrically connected to first surface empty
White area (111), the thickness of the first lug (2) is less than or equal to the thickness of primary diaphragm (12)；
Second lug (4) is arranged in second surface clear area (311) and to be electrically connected to first surface empty
White area (111), the thickness of the second lug (4) is less than or equal to the thickness of secondary diaphragm (32)；
First pole piece (1) is anode pole piece or cathode sheet, and correspondingly the second pole piece (3) is negative electrode pole
Sheet or anode pole piece；First lug (2) is anode lug or cathode tab, correspondingly the second lug (4)
For cathode tab or anode lug；First active material is active material of positive electrode or active material of cathode, phase
Should ground the second active material be active material of cathode or active material of positive electrode；Primary diaphragm (12) is anode
Diaphragm or negative electrode diaphragm, correspondingly secondary diaphragm (32) is negative electrode diaphragm or anode diaphragm；First afflux
Body (11) is anode collector or cathode current collector, and correspondingly the second collector (31) is cathode collector
Body or anode collector；First surface clear area (111) is anode clear area or negative electrode clear area, phase
Should second surface clear area, ground (311) be negative electrode clear area or anode clear area；
It is characterized in that,
Anode pole piece is inserted to the end of battery core at the head of winding process Anodic pole piece.
Battery core the most according to claim 1, it is characterised in that
The first area that first lug (2) is electrically connected with first surface clear area (111) is
1～30mm2, area is the first area 1～15 times of first surface clear area (111)；
The second area that second lug (4) is electrically connected with second surface clear area (311) is
1～30mm2, area is second area 1～15 times of second surface clear area (311).
Battery core the most according to claim 1, it is characterised in that
The length of first surface clear area (111) and the length of second surface clear area (311) are respectively
The 0.5%～40% of the width of battery core；
The width of first surface clear area (111) is the 1/4～3/4 of the width of the first pole piece (1)；
The width of second surface clear area (311) is the 1/4～3/4 of the width of the second pole piece (3).
Battery core the most according to claim 1, it is characterised in that
First lug (2) is electrically connected by ultra-sonic welded with first surface clear area (111)；
Second lug (4) is electrically connected by ultra-sonic welded with second surface clear area (311)；
Two surfaces of the first collector (11) are not provided with primary diaphragm (12) in relative position existence
Part, thus form two first surface clear areas (111), the first lug (2) is disposed therein
One；
Two surfaces of the second collector (31) are not provided with secondary diaphragm (32) in relative position existence
Part, thus form two second surface clear areas (311), the second lug (4) is disposed therein
One.
Battery core the most according to claim 4, it is characterised in that
Counting of solder joint (S) is 1～6；
The length of each solder joint (S) is less than the length of the first lug (2) and the second lug (4) respectively
0.05mm～10mm, the width of each solder joint (S) is 1mm～8mm；
The each solder joint (S) spacing between width (W) is upper is 0.05mm～4mm.
Battery core the most according to claim 1, it is characterised in that
First lug (2) is electrically connected by bonding with first surface clear area (111)；
Second lug (4) is electrically connected by bonding with second surface clear area (311).
Battery core the most according to claim 6, it is characterised in that
Bonding uses conducting resinl；
The length of conducting resinl is less than the length of the first lug (2) and the second lug (4) respectively
0.2mm～10mm,
The width of conducting resinl is less than the width of the first lug (2) and the second lug (4) respectively
0.1mm～5mm.
Battery core the most according to claim 6, it is characterised in that
Bonding employing low-melting-point metal or low-melting alloy；
The length of low-melting-point metal or low-melting alloy is respectively than the first lug (2) and the second lug (4)
Little 0.1mm～5mm of length；
The width of low-melting-point metal or low-melting alloy is respectively than the first lug (2) and the second lug (4)
Little 0.1mm～5mm of width.
Battery core the most according to claim 1, it is characterised in that battery core also includes:
First insulating cement (6), be covered in the first lug (2) in the face of the surface of the second pole piece (3)；
Second insulating cement (7), be covered in the second lug (4) in the face of the surface of the first pole piece (1).
Battery core the most according to claim 9, it is characterised in that
The length and width of the first insulating cement (6) is identical with the length and width of the first insulating cement (6),
And first surface clear area (111) is completely covered；
The length and width of the second insulating cement (7) is identical with the length and width of the second insulating cement (7),
And second surface clear area (311) is completely covered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510060477.3A CN105990612A (en) | 2015-02-05 | 2015-02-05 | Electrical core |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510060477.3A CN105990612A (en) | 2015-02-05 | 2015-02-05 | Electrical core |
Publications (1)
| Publication Number | Publication Date |
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| CN105990612A true CN105990612A (en) | 2016-10-05 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510060477.3A Pending CN105990612A (en) | 2015-02-05 | 2015-02-05 | Electrical core |
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| CN108807829A (en) * | 2014-11-10 | 2018-11-13 | 东莞新能源科技有限公司 | Battery core and electrochemical appliance |
| CN109994250A (en) * | 2019-04-17 | 2019-07-09 | 西安工程大学 | Low melting point SnBi alloy-copper composite electron slurry and preparation, printing process |
| CN110335984A (en) * | 2019-06-28 | 2019-10-15 | 宁德新能源科技有限公司 | A kind of dichotomous tab, electrode assembly and battery |
| CN112272877A (en) * | 2018-04-11 | 2021-01-26 | 宁德新能源科技有限公司 | Battery cell and battery |
| CN112582583A (en) * | 2020-12-15 | 2021-03-30 | 东莞维科电池有限公司 | Preparation method of quick-charging type lithium ion battery pole piece, pole piece and lithium ion battery |
| US20210399270A1 (en) * | 2020-06-19 | 2021-12-23 | Zhuhai Cosmx Battery Co., Ltd. | Battery and portable electrical device |
| US11329352B2 (en) | 2015-08-31 | 2022-05-10 | Ningde Amperex Technology Limited | Secondary battery cell and winding formation system thereof |
| CN114552136A (en) * | 2020-11-20 | 2022-05-27 | 北京小米移动软件有限公司 | Power supply module and manufacturing method thereof |
| WO2023103994A1 (en) * | 2021-12-06 | 2023-06-15 | 珠海冠宇电池股份有限公司 | Electrode plate and battery |
| WO2023102780A1 (en) * | 2021-12-08 | 2023-06-15 | 东莞新能源科技有限公司 | Electrochemical device and electronic device |
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| CN108807829A (en) * | 2014-11-10 | 2018-11-13 | 东莞新能源科技有限公司 | Battery core and electrochemical appliance |
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| CN114552136A (en) * | 2020-11-20 | 2022-05-27 | 北京小米移动软件有限公司 | Power supply module and manufacturing method thereof |
| CN112582583A (en) * | 2020-12-15 | 2021-03-30 | 东莞维科电池有限公司 | Preparation method of quick-charging type lithium ion battery pole piece, pole piece and lithium ion battery |
| WO2023103994A1 (en) * | 2021-12-06 | 2023-06-15 | 珠海冠宇电池股份有限公司 | Electrode plate and battery |
| WO2023102780A1 (en) * | 2021-12-08 | 2023-06-15 | 东莞新能源科技有限公司 | Electrochemical device and electronic device |
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Application publication date: 20161005 |