CN106992320A - Battery with nonaqueous electrolyte - Google Patents
Battery with nonaqueous electrolyte Download PDFInfo
- Publication number
- CN106992320A CN106992320A CN201610038666.5A CN201610038666A CN106992320A CN 106992320 A CN106992320 A CN 106992320A CN 201610038666 A CN201610038666 A CN 201610038666A CN 106992320 A CN106992320 A CN 106992320A
- Authority
- CN
- China
- Prior art keywords
- adhesive tape
- electrode group
- upper portion
- battery
- insulating adhesive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
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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
-
- 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 present invention provides a kind of battery with nonaqueous electrolyte, it possesses electrode group, battery case and electrolyte, electrode group has the lower surface opposed with the bottom surface of battery case, upper surface positioned at the opening portion side of battery case, and the side between lower surface and upper surface, on upper surface, positive wire is connected with positive plate, negative wire is connected with negative plate, it is characterized in that, upper portion insulating adhesive tape is pasted with the upper surface, upper portion insulating adhesive tape at least covers the part around the positive wire in upper surface and the part around negative wire, and affix to the extension of upper portion insulating adhesive tape the side of electrode group, periphery insulating tape is pasted with the side of electrode group, and, periphery insulating tape covers the part on the side of electrode group of upper portion insulating adhesive tape.According to the battery with nonaqueous electrolyte of the present invention, the generation of the internal short-circuit of battery can be reduced, so as to improve the security of battery.
Description
Technical field
The present invention relates to a kind of battery, more particularly to a kind of battery with nonaqueous electrolyte.
Background technology
In recent years, battery with nonaqueous electrolyte is electric as the driving of portable electric appts and communication equipment etc.
Source and be widely used.Battery with nonaqueous electrolyte generally comprises battery case, hush panel, lead, electrode
Group and electrolyte etc., the electrode group are laminated and wound by positive plate, barrier film, negative plate and formed,
Electrode group and electrolyte are sealed in the closed chamber formed by the battery case and hush panel.
Battery with nonaqueous electrolyte is divided by shape, generally can be divided into cylindrical nonaqueous electrolytic battery and side
Shape battery with nonaqueous electrolyte.Wherein, square battery with nonaqueous electrolyte is by by positive plate, negative plate
And the barrier film between the positive plate and the negative plate is laminated and winds and form toroidal or ellipse
The electrode group of toroidal, is compressed to the electrode group and the electrode group is deformed into flat electrode
The electrode group of the flat, is then inserted into the battery case of square tube shape, then in battery case by group
Opening portion assembly sealing plate, envelope bolt and backplate etc., and electrolyte is injected, so as to can obtain square non-
Water electrolysis solution battery.
Battery with nonaqueous electrolyte has the advantages that capacity height, cycle performance are excellent.But, in recent years,
The report for triggering fire even to explode on secondary cell is of common occurrence, in particular with secondary electricity
The problem of raising of the capacity in pond, battery security, increasingly protrudes.Therefore, how battery is improved
The problem of security is increasingly becoming main at present.
The content of the invention
It is an object of the invention to provide a kind of safe battery with nonaqueous electrolyte.
The inventors discovered that, existing battery with nonaqueous electrolyte has under the abnormal conditions such as vibrated
When the problem of can occur the securities such as internal short-circuit.Think after being studied through the present inventor, it is existing non-aqueous
In electrolyte battery, the upper surface of electrode group is generally in exposed state, when battery is vibrated etc.
Under abnormal conditions, foreign matter of metallicity etc. is easily accessible the upper surface of electrode group, so as to can cause electricity
The safety issues such as internal short-circuit occur for pond.
In order to solve the above problems, the present inventor it has been investigated that, by the upper surface of electrode group
Insulating tape is suitably set, and the problem of efficiently solving such improves the security of battery.But
It is, the inventors discovered that, even such battery that insulating tape has been pasted on upper surface, according to
The unfavorable condition of internal short-circuit, particularly after long-term discharge and recharge use, such situation so occurs
Generation it is still a lot.The present inventor has found that this is due to exist in battery afterwards after further study
In the case of electrolyte, insulating tape easily loses viscosity, so that easily occur floating for insulating tape,
Or, because of turnup, deviation of insulating tape etc. caused by battery vibration or the movement of electrode group position.
The present inventor is based on the studies above result, it is proposed that following battery with nonaqueous electrolyte.
(1) battery with nonaqueous electrolyte of the invention possesses electrode group, battery case and electrolyte, described
Electrode group by by positive plate, negative plate and be sandwiched between the positive plate and the negative plate every
Film layer is folded and wound and forms, the electrode group have the lower surface opposed with the bottom surface of the battery case,
Positioned at the upper surface of the opening portion side of the battery case and positioned at the lower surface and the upper surface
Between side, on the upper surface, positive wire is connected with the positive plate, negative wire with
The negative plate connection, it is characterised in that
Upper portion insulating adhesive tape is pasted with the upper surface, the upper portion insulating adhesive tape at least will be described
The part around the positive wire in upper surface and the part covering around the negative wire, and
And the upper portion insulating adhesive tape affixes to the side of the electrode group with extending,
Periphery insulating tape is pasted with the side of the electrode group, also, the periphery is exhausted
Edge adhesive tape covers the part on the side of the electrode group of the upper portion insulating adhesive tape.
(2) battery with nonaqueous electrolyte according to (1), it is characterised in that the upper portion insulating
Adhesive tape is the square insulating adhesive tape for having two openings in central portion, and the positive wire is opened positioned at one
In mouthful, the negative wire is located in another opening.
(3) battery with nonaqueous electrolyte according to (1) or (2), it is characterised in that on described
Portion's insulating tape by the upper surface except the positive wire and the negative wire setting position it
Outer part is all covered.
(4) a kind of battery with nonaqueous electrolyte, it possesses electrode group, battery case and electrolyte, described
Electrode group by by positive plate, negative plate and be sandwiched between the positive plate and the negative plate every
Film layer is folded and wound and forms, the electrode group have the lower surface opposed with the bottom surface of the battery case,
Positioned at the upper surface of the opening portion side of battery case and between the lower surface and the upper surface
Side, on the upper surface, positive wire is connected with the positive plate, negative wire with it is described
Negative plate is connected, it is characterised in that
More than two upper portion insulating adhesive tapes are pasted with the upper surface, more than described two
Upper portion insulating adhesive tape at least by the part around the positive wire in the upper surface and described negative
Part covering around the lead of pole, and at least one extension ground stickup in the upper portion insulating adhesive tape
To the side of the electrode group,
Also, when there is the end of any upper portion insulating adhesive tape on the upper surface, the end
By the covering of other upper portion insulating adhesive tapes,
Periphery insulating tape, the periphery insulating tape are pasted with the side of the electrode group
By the covering of the part on the side of the electrode group of the upper portion insulating adhesive tape.
(5) battery with nonaqueous electrolyte according to (4), it is characterised in that the upper portion insulating
Adhesive tape is made up of the 1st upper portion insulating adhesive tape and the 2nd upper portion insulating adhesive tape,
The 1st upper portion insulating adhesive tape and the 2nd upper portion insulating adhesive tape are by square main part and position
Constituted in three square protuberances on one side of the square main part, two adjacent square protrusions
There is space part, the protrusion length of the square protuberance of the 2nd upper portion insulating adhesive tape is longer than between portion
The protrusion length of the square protuberance of the 1st upper portion insulating adhesive tape,
The square main part of the 1st upper portion insulating adhesive tape and the 2nd upper portion insulating adhesive tape
The square main part to clamp the upper surface and opposed mode is pasted onto on the side, and
Make the square main part and the 2nd upper portion insulating of the 1st upper portion insulating adhesive tape by folding
The square main part of adhesive tape will be covered with the side adjacent portion upper surface,
Three square protuberances of the 1st upper portion insulating adhesive tape are pasted onto on the upper surface, described
Positive wire is located in a space part, and the negative wire is located in another space part,
Three square protuberances of the 2nd upper portion insulating adhesive tape are by the 1st upper portion insulating adhesive tape
Three square protuberance coverings, and by folding further covering to the side of the electrode group
Untill.
(6) battery with nonaqueous electrolyte according to above-mentioned (5), it is characterised in that described square
The part that main part is covered on the upper surface is rectangle, and the rectangle is in the thickness side of electrode group
Upward width is more than the 1/3 of electrode group thickness.
(7) battery with nonaqueous electrolyte according to any one of above-mentioned (1)~(6), its feature
Be, at least one of the positive wire and the negative wire and the upper portion insulating adhesive tape it
Between have gap.
(8) battery with nonaqueous electrolyte according to any one of above-mentioned (1)~(6), its feature
It is, the periphery insulating tape covers the whole face of the side of the electrode group.
(9) battery with nonaqueous electrolyte according to any one of above-mentioned (1)~(6), its feature
It is, electrode group bottom fixation adhesive tape is pasted with the lower surface of the battery case, and it is described
The two ends of electrode group bottom fixation adhesive tape extend to the side of the electrode group, the periphery insulation
Adhesive tape covers the part on the side of the electrode group of electrode group bottom fixation adhesive tape.
(10) battery with nonaqueous electrolyte according to above-mentioned (9), it is characterised in that in the electricity
It is further provided with bottom insulation adhesive tape on the lower surface of pole group, the bottom insulation adhesive tape is by institute
State electrode group bottom fixation adhesive tape and a part of periphery insulating tape close to lower surface is covered.
(11) battery with nonaqueous electrolyte according to any one of above-mentioned (1)~(6), its feature
It is, the battery with nonaqueous electrolyte is rectangular cell, the electrode group is formed as flat by compression
Flat-shaped, the side is the face vertical with the direction of the compression.
, can be effectively by suitably setting insulating tape according to the battery with nonaqueous electrolyte of the present invention
The foreign matter of metallicity is avoided to enter in electrode group, so as to the generation for the internal short-circuit for reducing battery,
Improve the security of battery, the security of the battery after can particularly improving by long-term use.
Brief description of the drawings
Fig. 1 is the schematic cross-section for representing the battery with nonaqueous electrolyte of the present invention.
Fig. 2 is the schematic perspective view for the electrode group for representing one embodiment of the present invention.
Fig. 3 is the side schematic view for the electrode group for representing one embodiment of the present invention.
Fig. 4 is the schematic diagram for representing the 1st upper portion insulating adhesive tape and the 2nd upper portion insulating adhesive tape of the present invention.
Fig. 5 is a kind of schematic diagram for the upper portion insulating adhesive tape for representing embodiment.
Fig. 6 represents to paste the 1st upper portion insulating adhesive tape and the 2nd upper portion insulating adhesive tape in electrode group
The schematic perspective view of state.
Fig. 7 is the side schematic view for the electrode group for representing one embodiment of the present invention.
Fig. 8 is the schematic diagram of the bonding method for the insulating tape for representing comparative example.
Reference
1 electrode group
11 lower surfaces
12 upper surfaces
13 sides
2 battery cases
21 bottom surfaces
3 positive pole negative lines
4 negative wires
51 the 1st upper portion insulating adhesive tapes
52 the 2nd upper portion insulating adhesive tapes
6 periphery insulating tapes
7 electrode group bottom fixation adhesive tapes
81 square main parts
82 square protuberances
83 space parts
9 insulating tapes
91 openings
Embodiment
Below in conjunction with the accompanying drawings, the various embodiments to the present invention are described in detail.
Fig. 1 is the schematic cross-section for representing the battery with nonaqueous electrolyte of the present invention.As shown in figure 1, this
The battery with nonaqueous electrolyte of invention possesses electrode group 1, battery case 2 and electrolyte (not shown).Its
In, the electrode group 1 is by by positive plate, negative plate and being sandwiched in the positive plate and the negative pole
Barrier film between piece is laminated and wound and forms.
Fig. 2 is the schematic perspective view for the electrode group for representing one embodiment of the present invention.Fig. 3 is table
Show the side schematic view of the electrode group of one embodiment of the present invention.As shown in Figures 1 to 3, the electricity
Pole group 1 has the lower surface 11 opposed with the bottom surface 21 of the battery case 2, opening positioned at battery case 2
The upper surface 12 of oral area side and the side between the lower surface 11 and the upper surface 12
13, on the upper surface 12, positive wire 3 is connected with the positive plate (not shown), negative pole
Lead 4 is connected with the negative plate (not shown).
In one embodiment of the invention, upper portion insulating adhesive tape is pasted with the upper surface 12,
The upper portion insulating adhesive tape at least by the part around the positive wire 3 in the upper surface 12 and
Part covering around the negative wire 4, and the upper portion insulating adhesive tape affixes to institute with extending
The side 13 of electrode group 1 is stated, it is exhausted to be pasted with periphery on the side 13 of the electrode group 1
Edge adhesive tape 6, also, the upper portion insulating adhesive tape is located at the electrode by the periphery insulating tape 6
Part covering on the side 13 of group 1.
In the present invention, in order to solve the above-mentioned technical problem, by the upper surface 12 of electrode group 1,
Top is properly set around the positive wire and negative wire that especially metallic foreign body easily drops
Insulating tape, and on the basis of upper portion insulating adhesive tape, by further in the electrode group 1
Periphery insulating tape 6 is pasted on 13 sideways, makes the periphery insulating tape 6 by upper portion insulating adhesive tape
On the side 13 of the electrode group 1 part covering, even if so that upper portion insulating adhesive tape for a long time with
Electrolyte contacts, also can effectively prevent floating for upper portion insulating adhesive tape, prevent because of battery vibration or electricity
Turnup, deviation of insulating tape etc. caused by the movement of pole group position, even if so that battery through making for a long time
With rear, security is still excellent.In addition, with periphery insulating tape 6 by the position of upper portion insulating adhesive tape
In the case of the part covering on the side 13 of the electrode group 1, upper portion insulating glue will pasted
When the electrode group of band is encased in battery case, more successfully electrode group can be encased in battery case,
It is less likely to occur because upper portion insulating adhesive tape is suspended on the opening portion of battery case, so as to damage asking for electrode group
Topic.
As described above, upper surface is located at into positive wire and negative wire by using upper portion insulating adhesive tape
The part covering of surrounding, can effectively improve security.From the further angle for improving security,
It is preferred that the part between positive wire and negative wire is all capped.It is used as such upper portion insulating glue
The specific example of band, for example can be using the square insulating adhesive tape 9 shown in Fig. 5.As shown in figure 5, on
Portion's insulating tape in central portion by having the square insulating adhesive tape 9 of two openings 91 to constitute.This is insulated
When tape-stripping is on the upper surface of electrode group, positive wire 3 is located in an opening 91, and negative pole draws
Line 4 is located in another opening 91., can be effectively by positive pole by such square insulating adhesive tape 9
Upper surface covering around lead and negative wire, especially can be by between positive wire and negative wire
Part covering, compared with being not provided with the situation of upper portion insulating adhesive tape, can effectively prevent metallicity
Foreign matter enters electrode group.
In addition, being the feelings that rectangular cell, i.e. electrode group is pancake electrode group in battery in the present invention
Under condition, it is preferred that as shown in Fig. 2 the upper portion insulating adhesive tape will remove its both sides in upper surface
Arch section outside part covering., can also be by from the further angle for improving security
The upper surface 12 all coverings.Wherein, when the upper surface 12 is all covered, in order to just
It is flowed into electrolyte in electrode group, preferably in the positive wire 3 and the negative wire 4
At least one is provided with gap between the upper portion insulating adhesive tape.
In addition, on periphery insulating tape 6, as long as the upper portion insulating adhesive tape is located at into the electrode
Group 1 the side 13 on part covering, just can effectively prevent upper portion insulating adhesive tape float or
Turnup.In order to further prevent floating or turnup for upper portion insulating adhesive tape, more preferably described periphery insulation
Side of the adhesive tape 6 along electrode group is wound at least one week, and then, as shown in figure 3, more preferably described
Periphery insulating tape 6 (oblique line portion in Fig. 3) covers the whole face of the side 13.
In the present invention, in order to solve the above-mentioned technical problem, it can also be pasted with the upper surface 12
More than two upper portion insulating adhesive tapes, at least will be described by the upper portion insulating adhesive tape more than described two
The part around the positive wire 3 in upper surface 12 and the part around the negative wire 4 are covered
Cover, and at least one in the upper portion insulating adhesive tape affixes to the institute of the electrode group 1 with extending
Side 13 is stated, periphery insulating tape 6 is pasted with the side 13 of the electrode group 1, it is described
Periphery insulating tape 6 is by the upper portion insulating adhesive tape on the side 13 of the electrode group 1
Part covering.
According to above-mentioned embodiment, battery security is improved using more than two upper portion insulating adhesive tapes,
The design of upper portion insulating adhesive tape can be improved, effective covering to upper surface is easily realized, especially exists
The paste operation of upper portion insulating adhesive tape convenient to carry out, can greatly improve production efficiency in industrial production, because
This is preferred.
But, the inventors discovered that, when the end of any upper portion insulating adhesive tape is located at the upper surface 12
On, and it is exposed in most external, i.e. directly with electrolyte contacts in the case of, because the end is long-term
With electrolyte contacts, viscosity is easily lost, so that easily occur floating for upper portion insulating adhesive tape, or
Because of turnup, deviation of insulating tape etc. caused by battery vibration or the movement of electrode group position, so that nothing
Method effectively realizes the purpose of the present invention.
Therefore, in above-mentioned embodiment, when there is any upper portion insulating adhesive tape on the upper surface 12
End when, the end by other upper portion insulating adhesive tapes cover.That is, any upper portion insulating
The end of adhesive tape is not directly exposed to arrive most external, so as to be effectively prevented from above mentioned problem.In addition, this
In " end " refer to easily lose viscosity after electrolyte Long Term Contact and the position that floats or
Easily occur turnup, the position deviateed because of battery vibration or the movement of electrode group position.
In addition, in the present invention, as long as the upper portion insulating adhesive tape more than described two is by upper surface 12
Part covering around part and the negative wire 4 around the positive wire 3, just can be effective
Improve security in ground.From the further angle for improving security, preferably positive wire draws with negative pole
Part between line is all capped.
It is in the case that rectangular cell, i.e. electrode group is pancake electrode group in battery, as shown in Fig. 2
It is preferred that it is described two more than upper portion insulating adhesive tape by upper surface in addition to the arch section of its both sides
Part covering.In addition, from the further angle for improving security, can also be by the upper end
The all coverings of face 12.Wherein, when the upper surface 12 is all covered, for the ease of electrolyte
It is flowed into electrode group, preferably at least one of the positive wire 3 and the negative wire 4
With being provided with gap between described two upper portion insulating adhesive tapes above.
And then, on using more than two upper portion insulating adhesive tapes mode, the present invention in, such as Fig. 4
In (A) and (B) shown in, preferably use the 1st upper portion insulating adhesive tape 51 and the 2nd upper portion insulating
The two the upper portion insulating adhesive tapes of adhesive tape 52.Specifically, the 1st upper portion insulating adhesive tape 51 and institute
The 2nd upper portion insulating adhesive tape 52 is stated by square main part 81 and positioned at the one of the square main part 81
Three square protuberances 82 on side are constituted, and have space between two adjacent square protuberances 82
Portion 83, the protrusion length b of the square protuberance 82 of the 2nd upper portion insulating adhesive tape 52 is longer than described
The protrusion length a of the square protuberance 82 of 1st upper portion insulating adhesive tape 51.
And then, on the 1st upper portion insulating adhesive tape 51 and the method for attaching of the 2nd upper portion insulating adhesive tape 52,
As shown in fig. 6, by the way that the top of square main part 81 and the 2nd of the 1st upper portion insulating adhesive tape 51 is exhausted
The square main part 81 of edge adhesive tape 52 is to clamp upper surface 12 and opposed mode is pasted onto side 13
On.Then, the top of square main part 81 and the 2nd of the 1st upper portion insulating adhesive tape 51 is made by folding
The square main part 81 of insulating tape 52 will be covered with 13 adjacent portion upper surfaces of side.1st
Three square protuberances 82 of upper portion insulating adhesive tape 51 are pasted onto on upper surface 12, positive wire 3
In a space part 83, negative wire 4 is located in another space part 83.2nd upper portion insulating
Three square protuberances 82 of adhesive tape 52 are by three of the 1st upper portion insulating adhesive tape 51 square protuberances 82
Covering, and by folding further covering to the square main part 81 of the 1st upper portion insulating adhesive tape 51
Untill.
Here, although three ends position of three square protuberances 82 of the 1st upper portion insulating adhesive tape 51
In on the upper surface 12, still, three ends are covered by the 2nd upper portion insulating adhesive tape 52, thus
Will not occur the floating of the 1st upper portion insulating adhesive tape 51, turnup.
As described above, by pasting the 1st upper portion insulating adhesive tape 51 and the 2nd upper portion insulating adhesive tape 52, with
The situation for being not provided with upper portion insulating adhesive tape is compared, and can effectively improve battery security, and operate
Property and productivity ratio it is good, therefore preferably.
In addition, using above-mentioned 1st upper portion insulating adhesive tape 51 and above-mentioned 2nd upper portion insulating adhesive tape 52
In the case of, the part that the square main part 81 is covered on the upper surface 12 is rectangle,
Width of the rectangle on the thickness direction of electrode group is more than the 1/3 of electrode group thickness.By inciting somebody to action
It is wide that square main part 81 is covered in minimum of the part on upper surface 12 on the thickness direction of electrode group
Degree is defined to the 1/3 of electrode group thickness, battery security can be made better.
In addition, using above-mentioned 1st upper portion insulating adhesive tape 51 and above-mentioned 2nd upper portion insulating adhesive tape 52
In the case of, it is exhausted positioned at the 1st upper portion insulating adhesive tape 51 and the 2nd top in the upper surface 12
The part in the outside of edge adhesive tape 52 is not covered with insulating tape, however, if necessary, the part can also
Further covered by insulating tape.
It is preferred that in the case of, as shown in fig. 6, the above-mentioned 1st upper portion insulating adhesive tape 51 and upper of the present invention
Stating the 2nd upper portion insulating adhesive tape 52 is used for flat electrode group, the above-mentioned He of 1st upper portion insulating adhesive tape 51
The square main part 81 of above-mentioned 2nd upper portion insulating adhesive tape 52 is secured to be compressed with the electrode group
The vertical face in direction on.
In addition, on periphery insulating tape 6, as long as the upper portion insulating adhesive tape is located at into the electrode
Group 1 the side 13 on part covering, just can effectively prevent upper portion insulating adhesive tape float or
Turnup.In order to further prevent floating or turnup for upper portion insulating adhesive tape, more preferably described periphery insulation
Side of the adhesive tape 6 along electrode group is wound at least one week, and then, as shown in figure 3, more preferably described
Periphery insulating tape 6 (oblique line portion in Fig. 3) covers the whole face of the side 13.By
The whole face of the side 13 sets periphery insulating tape 6, and can ensure that prevents coming off for upper portion insulating adhesive tape
Deng, and can make it that electrode group is easier to insert into battery case, will not occur periphery insulating tape quilt
Situation about being tangled at the opening of battery case.
In addition, as shown in figure 3, being preferably pasted with electrode on the lower surface 11 of the electrode group 1 of the present invention
Group bottom fixation adhesive tape 7, and the two ends of electrode group bottom fixation adhesive tape 7 extend to the side of electrode group 1
Face 13, and electrode group bottom fixation adhesive tape 7 is located at electrode group 1 by periphery insulating tape 6
Side 13 on part covering., can be effectively by electrode using the electrode group bottom fixation adhesive tape 7
Group is reinforced so that the structure of electrode group is more stablized, consequently facilitating attaching periphery insulating tape 6.And then,
By the way that the part on the side 13 of electrode group bottom fixation adhesive tape 7 is covered with periphery insulating tape 6
Lid, can further improve the stability of the structure of electrode group, and can prevent electrode group bottom fixing glue
A problem that long period of soaking of band 7 falls off, floated in the electrolytic solution.
In addition, in the present invention, as shown in fig. 7, it is preferred that on the lower surface 11 of electrode group 1 further
It is provided with bottom insulation adhesive tape 71, the bottom insulation adhesive tape 71 is by electrode group bottom fixation adhesive tape 7
And a part of periphery insulating tape 6 close to lower surface 11 is covered.Thus, it is possible to ensure electrode group with
The insulation of battery case bottom, and the structure of electrode group is more stablized.
In addition, the battery with nonaqueous electrolyte of the present invention can be as one-shot battery, can also be as secondary
Battery, during as secondary cell, for example, can be lithium rechargeable battery.
The shape of the battery with nonaqueous electrolyte of the present invention is not particularly limited, and can be cylindrical shape or square
Deng preferably rectangular cell.In the case of for rectangular cell, the electrode group by positive plate,
After negative plate and the barrier film being sandwiched between the positive plate and the negative plate are laminated and wound, enter
One step is formed as flat by compression, and the electrode group of the flat then is inserted into square tube shape
In battery case, rectangular cell can obtain.In addition, for the electrode group of rectangular cell, " side "
It is primarily referred to as the face vertical with the direction that the electrode group is compressed.
In the present invention, battery case can be the various battery cases commonly used in battery with nonaqueous electrolyte, generally
There is the bottomed tube battery case of opening portion using one end, battery case can be selected according to the shape of battery
Shape, such as can use square tube shape or cylindrical shape.
In the present invention, the structure on the positive plate in electrode group, negative plate and barrier film is not special
Limit, the part commonly used in battery with nonaqueous electrolyte can be used.
In the present invention, the insulating tape such as upper portion insulating adhesive tape, periphery insulating tape, bottom insulation adhesive tape,
And the material of electrode group bottom fixation adhesive tape is not particularly limited.It is, for example, possible to use by polypropylene
(PP), the insulating tape of the resin formation of the excellent heat resistance such as polyphenylene sulfide (PPS), polyimides.
The present invention relates to insulating tape is further set in a particular manner in electrode group, so as to improve
Battery security.For the other structures of the battery of the present invention, it can use in battery with nonaqueous electrolyte
Conventional various structures, here is omitted.
Embodiment
The present invention is further illustrated below by embodiment.
Embodiment 1
By the LiCoO of 90 parts by weight2, the acetylene black of 7 parts by weight, the PVDF N- of 3 parts by weight
N-methyl-2-2-pyrrolidone N (NMP) is equably mixed, and slurry is made.The slurry is coated on aluminium foil
Two sides.Slurry drying is removed after solvent, positive electrode material mixture layer is made.By carrying out roller process,
Adjust the density of positive electrode material mixture layer.
By the graphite of 98 parts by weight, the weight of carboxymethyl cellulose aqueous solution 1.0 that concentration is 1 weight %
Part, the parts by weight of butadiene-styrene rubber 1.0 and the electrical conductivity as solvent are 2.0 × 105Ω/more than cm ion
Exchanged water is mixed, and has made slurry, the slurry is coated on to the two sides of copper foil.By the slurry drying
Remove after solvent, anode mixture layer is made.By roller process, the density of anode mixture layer is adjusted.
Positive plate, negative plate and the barrier film being sandwiched between the positive plate and the negative plate are laminated,
Winding, and it is compressed and is made the electrode group of flat.Barrier film is micro- porous using polyethylene (PE)
Film.
According to the present invention as shown in Figure 2, Fig. 5 upper portion insulating adhesive tape 9 is pasted into electrode group 1
Upper surface 12 on, make positive wire 3 and negative wire 4 respectively be located at upper portion insulating adhesive tape 9 one
In individual opening 91.The two ends of upper portion insulating adhesive tape 9 extend to the side of electrode group 1.
The adhesive electrode group bottom fixation adhesive tape 7 on the lower surface 11 of electrode group 1, and electrode group bottom
The two ends of portion's fixation adhesive tape 7 extend to the side 13 of electrode group 1.
Periphery insulating tape 6 is pasted on the side 13 of electrode group 1, the periphery insulating tape 6 will be upper
The covering of the part on the side 13 of electrode group 1 of portion's insulating tape 9, also, by electrode group bottom
The covering of the part on the side 13 of electrode group 1 of portion's fixation adhesive tape 7.
And then, bottom insulation adhesive tape 71 is further set on the lower surface 11 of electrode group 1, and bottom is exhausted
Edge adhesive tape 71 insulate by electrode group bottom fixation adhesive tape 7 and close to a part of periphery of lower surface 11
Adhesive tape 6 is covered.
The electrode group for having pasted insulating tape as described above is inserted into the cubic battery of aluminium alloy
In.Electrolyte is injected in battery case, so as to make nonaqueous electrolytic solution secondary battery.Electrolyte is
By EC and MEC according to volume ratio 1：According to the dense of 1.2mol/L in 2 solvents being obtained by mixing
Degree dissolving LiPF6Obtained from electrolyte.
Embodiment 2
Nonaqueous electrolytic solution secondary battery is made according to embodiment 1, unlike, glue in the following manner
Paste insulating tape.
The bonding method of insulating tape：
According to shown in Fig. 6, by the square main part 81 of the 1st upper portion insulating adhesive tape 51 as shown in Figure 4
It is viscous to clamp upper surface 12 and opposed mode with the square main part 81 of the 2nd upper portion insulating adhesive tape 52
It is attached on 13 (faces vertical with the direction that electrode group is compressed) of side, and make the 1st by folding
The square main part 81 of the upper portion insulating adhesive tape 52 of square main part 81 and the 2nd of upper portion insulating adhesive tape 51
It will be covered with 13 adjacent portion upper surfaces of side.
Three square protuberances 82 of the 1st upper portion insulating adhesive tape 51 are pasted onto on upper surface 12, positive pole
Lead 3 is located in a space part 83, and negative wire 4 is located in another space part 83,
Three square protuberances 82 of the 2nd upper portion insulating adhesive tape 52 are by the 1st upper portion insulating adhesive tape 51
Three square protuberances 82 are covered, and by folding further covering to the side 13 of electrode group 1
Untill.
The adhesive electrode group bottom fixation adhesive tape 7 on the lower surface 11 of electrode group 1, and electrode group bottom
The two ends of portion's fixation adhesive tape 7 extend to the side 13 of electrode group 1.
Paste periphery insulating tape 6 on the side 13 of electrode group 1, the periphery insulating tape 6 is by the
1 upper portion insulating adhesive tape 51 and the 2nd upper portion insulating adhesive tape 52 on the side 13 of electrode group 1
Part is covered, also, by electrode group bottom fixation adhesive tape 7 on the side 13 of electrode group 1
Part is covered.
And then, bottom insulation adhesive tape 71 is further set on the lower surface 11 of electrode group 1, and bottom is exhausted
Edge adhesive tape 71 insulate by electrode group bottom fixation adhesive tape 7 and close to a part of periphery of lower surface 11
Adhesive tape 6 is covered.
Comparative example 1
Nonaqueous electrolytic solution secondary battery is made according to embodiment 1, unlike, upper portion insulating adhesive tape 9
The part positioned at battery side do not covered by periphery insulating tape 6.
Comparative example 2
Nonaqueous electrolytic solution secondary battery is made according to embodiment 1, unlike, upper portion insulating adhesive tape 9
One end do not extend to the side of electrode group 1, but on upper surface 12.
Comparative example 3
Nonaqueous electrolytic solution secondary battery is made according to embodiment 2, unlike, with two shown in Fig. 8
Individual insulating tape 53 replaces the 1st upper portion insulating adhesive tape 51 and the 2nd upper portion insulating adhesive tape 52.Two
One end of insulating tape 53 is respectively positioned on upper surface 12.
Comparative example 4
Nonaqueous electrolytic solution secondary battery is made according to comparative example 3, unlike, on upper surface 12
The end of insulating tape 53 further extend, until two insulating tapes 53 are bonded opposite each otherly.
Test method
The battery of embodiment and comparative example is subjected to discharge and recharge as steps described below：
(1) under 60 DEG C of environment, battery is subjected to constant current charge with 0.7C current value, until
Untill cell voltage is 4.2V.
(2) then, charged under 4.2V constant voltage, until current value decays to 0.05C
Untill.
(3) then, battery is made to stop 10 minutes.
(4) then, by battery using 1.0C constant current discharge to voltage untill 0.05C.
(5) above-mentioned charge and discharge process is repeated into 200 circulations.
The decomposition of the battery after above-mentioned discharge and recharge will have been carried out, the situation that electrode group observes insulating tape is taken out.
Result of the test
Upper portion insulating adhesive tape on the upper surface of the electrode group of embodiment 1 and embodiment 2 is intact, with electricity
Situation when pond is installed is identical, can maintain excellent security well for a long time.
In comparative example 1, because upper portion insulating adhesive tape 9 is not covered by periphery insulating tape 6, therefore,
After long-time discharge and recharge use, upper portion insulating adhesive tape loses viscosity, floats from electrode group.
In the electrode group of comparative example 2, upper portion insulating adhesive tape is sent out since the end that it is located at upper surface
Give birth to and floated and depart from, upper portion insulating adhesive tape can not cover upper surface well.
In addition, in the electrode group of comparative example 3 and 4, the insulating tape on upper surface lose viscosity and
Float and depart from.
It can be seen from above-described embodiment and comparative example, according to the battery with nonaqueous electrolyte of the present invention, can have
Avoid to effect causing battery generation internal short because of the upper surface that foreign matter of metallicity etc. enters electrode group
The safety issue on road, and used even across long-term discharge and recharge, security still keeps excellent.
Claims (11)
1. a kind of battery with nonaqueous electrolyte, it possesses electrode group (1), battery case (2) and electrolysis
Liquid, the electrode group (1) by by positive plate, negative plate and be sandwiched in the positive plate with it is described negative
Barrier film between pole piece is laminated and wound and forms, and the electrode group (1) has and the battery case (2)
The opposed lower surface (11) in bottom surface (21), the upper surface positioned at the opening portion side of battery case (2)
(12) side (13) and between the lower surface (11) and the upper surface (12),
On the upper surface (12), positive wire (3) is connected with the positive plate, negative wire (4)
It is connected with the negative plate, it is characterised in that
Upper portion insulating adhesive tape is pasted with the upper surface (12), the upper portion insulating adhesive tape is at least
By the part around the positive wire (3) in the upper surface (12) and the negative wire (4)
The part covering of surrounding, and the upper portion insulating adhesive tape affixes to the electrode group (1) with extending
The side (13),
Periphery insulating tape (6) is pasted with the side (13) of the electrode group (1), and
And, the periphery insulating tape (6) is located at the electrode group (1) by the upper portion insulating adhesive tape
The side (13) on part covering.
2. battery with nonaqueous electrolyte according to claim 1, it is characterised in that the top is exhausted
Edge adhesive tape is the square insulating adhesive tape (9) for having two openings (91) in central portion, and the positive pole draws
Line (3) is located in an opening (91), and the negative wire (4) is located at another opening (91)
In.
3. battery with nonaqueous electrolyte according to claim 1, it is characterised in that the top is exhausted
Edge adhesive tape removes the positive wire (3) and the negative wire (4) by the upper surface (12)
Set position outside part all cover.
4. a kind of battery with nonaqueous electrolyte, it possesses electrode group (1), battery case (2) and electrolysis
Liquid, the electrode group (1) by by positive plate, negative plate and be sandwiched in the positive plate with it is described negative
Barrier film between pole piece is laminated and wound and forms, and the electrode group (1) has and the battery case (2)
The opposed lower surface (11) in bottom surface (21), the upper surface positioned at the opening portion side of battery case (2)
(12) side (13) and between the lower surface (11) and the upper surface (12),
On the upper surface (12), positive wire (3) is connected with the positive plate, negative wire (4)
It is connected with the negative plate, it is characterised in that
More than two upper portion insulating adhesive tapes are pasted with the upper surface (12), pass through described two
Upper portion insulating adhesive tape more than individual is at least by the positive wire (3) week in the upper surface (12)
Part covering around the part enclosed and the negative wire (4), and in the upper portion insulating adhesive tape
At least one extension affix to the side (13) of the electrode group (1),
Also, when there is the end of any upper portion insulating adhesive tape on the upper surface (12), institute
End is stated to be covered by other upper portion insulating adhesive tapes,
Periphery insulating tape (6), institute are pasted with the side (13) of the electrode group (1)
State periphery insulating tape (6) and the upper portion insulating adhesive tape is located at the described of the electrode group (1)
Part covering on (13) sideways.
5. battery with nonaqueous electrolyte according to claim 4, it is characterised in that the top is exhausted
Edge adhesive tape is made up of the 1st upper portion insulating adhesive tape (51) and the 2nd upper portion insulating adhesive tape (52),
The 1st upper portion insulating adhesive tape (51) and the 2nd upper portion insulating adhesive tape (52) are by side
Shape main part (81) and three square protuberances on one side of the square main part (81)
(82) constitute, there is between two adjacent square protuberances (82) space part (83), described the
It is exhausted that the protrusion length of the square protuberance (82) of 2 upper portion insulating adhesive tapes (52) is longer than the 1st top
The protrusion length of the square protuberance (82) of edge adhesive tape (51),
On the square main part (81) of the 1st upper portion insulating adhesive tape (51) and the described 2nd
The square main part (81) of portion's insulating tape (52) is to clamp the upper surface (12) and right
The mode put is pasted onto on the side (13), and makes the 1st upper portion insulating glue by folding
Band (51) the square main part (81) and the 2nd upper portion insulating adhesive tape (52) it is described
Square main part (81) will cover with the side (13) adjacent portion upper surface,
Three square protuberances (82) of the 1st upper portion insulating adhesive tape (51) are pasted onto on described
On end face (12), the positive wire (3) is located in a space part (83), and the negative pole draws
Line (4) is located in another space part (83),
Three square protuberances (82) of the 2nd upper portion insulating adhesive tape (52) are by the described 1st
Three square protuberance (82) coverings of portion's insulating tape (51), and further covered by folding
Lid is untill the side (13) of the electrode group (1).
6. battery with nonaqueous electrolyte according to claim 5, it is characterised in that the square master
The part that body portion (81) is covered on the upper surface (12) is rectangle, and the rectangle is in electrode
Width on the thickness direction of group is more than the 1/3 of electrode group thickness.
7. the battery with nonaqueous electrolyte according to claim 1 or 4, it is characterised in that it is described just
Between at least one of pole lead (3) and the negative wire (4) and the upper portion insulating adhesive tape
With gap.
8. the battery with nonaqueous electrolyte according to claim 1 or 4, it is characterised in that described outer
All insulating tapes (6) cover the whole face of the side (13) of the electrode group (1).
9. the battery with nonaqueous electrolyte according to claim 1 or 4, it is characterised in that the electricity
Electrode group bottom fixation adhesive tape (7), and institute are pasted with the lower surface (11) of pole group (1)
The two ends for stating electrode group bottom fixation adhesive tape (7) extend to the side (13) of the electrode group (1),
The periphery insulating tape (6) is located at the electrode by electrode group bottom fixation adhesive tape (7)
Part covering on the side (13) of group (1).
10. battery with nonaqueous electrolyte according to claim 9, it is characterised in that in the electricity
Bottom insulation adhesive tape (71) is further provided with the lower surface (11) of pole group (1), it is described
Bottom insulation adhesive tape (71) is by electrode group bottom fixation adhesive tape (7) and close to lower surface (11)
A part of periphery insulating tape (6) covering.
11. the battery with nonaqueous electrolyte according to claim 1 or 4, it is characterised in that described
Battery with nonaqueous electrolyte is rectangular cell, and the electrode group is formed as flat by compression, described
Side is the face vertical with the direction that the electrode group is compressed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610038666.5A CN106992320A (en) | 2016-01-20 | 2016-01-20 | Battery with nonaqueous electrolyte |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610038666.5A CN106992320A (en) | 2016-01-20 | 2016-01-20 | Battery with nonaqueous electrolyte |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106992320A true CN106992320A (en) | 2017-07-28 |
Family
ID=59413920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610038666.5A Pending CN106992320A (en) | 2016-01-20 | 2016-01-20 | Battery with nonaqueous electrolyte |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106992320A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200161694A1 (en) * | 2018-11-19 | 2020-05-21 | Ningde Amperex Technology Limited | Electrode assembly and battery having the same |
| CN111384314A (en) * | 2018-12-29 | 2020-07-07 | 宁德时代新能源科技股份有限公司 | Battery box |
| WO2020156178A1 (en) * | 2019-01-31 | 2020-08-06 | 宁德时代新能源科技股份有限公司 | Secondary cell |
| EP3863096A4 (en) * | 2018-10-01 | 2022-06-29 | Samsung SDI Co., Ltd. | Secondary battery |
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| JP2004014374A (en) * | 2002-06-10 | 2004-01-15 | Nec Tokin Tochigi Ltd | Sealed battery |
| CN1805204A (en) * | 2005-01-12 | 2006-07-19 | 三洋电机株式会社 | Non-aqueous electrolyte battery |
| CN201946704U (en) * | 2010-11-30 | 2011-08-24 | 上海比亚迪有限公司 | Pole core of lithium ion battery and lithium ion battery |
| CN103904368A (en) * | 2012-12-25 | 2014-07-02 | 日立麦克赛尔株式会社 | Lithium secondary battery |
| CN205564897U (en) * | 2016-01-20 | 2016-09-07 | 松下能源(无锡)有限公司 | Nonaqueous electrolyte battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004014374A (en) * | 2002-06-10 | 2004-01-15 | Nec Tokin Tochigi Ltd | Sealed battery |
| CN1805204A (en) * | 2005-01-12 | 2006-07-19 | 三洋电机株式会社 | Non-aqueous electrolyte battery |
| CN201946704U (en) * | 2010-11-30 | 2011-08-24 | 上海比亚迪有限公司 | Pole core of lithium ion battery and lithium ion battery |
| CN103904368A (en) * | 2012-12-25 | 2014-07-02 | 日立麦克赛尔株式会社 | Lithium secondary battery |
| CN205564897U (en) * | 2016-01-20 | 2016-09-07 | 松下能源(无锡)有限公司 | Nonaqueous electrolyte battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3863096A4 (en) * | 2018-10-01 | 2022-06-29 | Samsung SDI Co., Ltd. | Secondary battery |
| US20200161694A1 (en) * | 2018-11-19 | 2020-05-21 | Ningde Amperex Technology Limited | Electrode assembly and battery having the same |
| CN111384314A (en) * | 2018-12-29 | 2020-07-07 | 宁德时代新能源科技股份有限公司 | Battery box |
| WO2020156178A1 (en) * | 2019-01-31 | 2020-08-06 | 宁德时代新能源科技股份有限公司 | Secondary cell |
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