CN102306735A - Lithium ion electrical core and lug - Google Patents
Lithium ion electrical core and lug Download PDFInfo
- Publication number
- CN102306735A CN102306735A CN201110262704A CN201110262704A CN102306735A CN 102306735 A CN102306735 A CN 102306735A CN 201110262704 A CN201110262704 A CN 201110262704A CN 201110262704 A CN201110262704 A CN 201110262704A CN 102306735 A CN102306735 A CN 102306735A
- Authority
- CN
- China
- Prior art keywords
- lug
- metal tape
- protuberance
- width
- lithium
- 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.)
- Pending
Links
Images
Classifications
-
- 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
Landscapes
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention relates to the field of lithium ion batteries, and discloses a lithium ion electrical core and a lug. The lug comprises a metal band and lug glue, wherein the lug glue is bonded in the middle positions of the front surface and the back surface of the metal band; a protrusion part is arranged at one tail end of the metal band along the longitudinal direction; the protrusion part protrudes along the horizontal direction of the metal band; and the width of the protrusion part along the horizontal direction of the metal band is greater than that of the middle part of the metal band. The impedance at the welding part of the lug and a pole piece can be reduced by applying the lug in the lithium ion battery, the heat productivity at the welding part of the lug and the pole piece is reduced, and the bulge phenomenon of the lithium ion battery is avoided.
Description
Technical field
The present invention relates to the lithium ion battery field, relate in particular to a kind of lithium-ion electric core and lug.
Background technology
The Soft Roll lithium-ion electric core is mainly by pole piece; Barrier film; And lug; Plastic-aluminum packaging film is formed; Wherein this barrier film is at interval between every positive plate and negative plate; Lug is welded on the pole piece with as the external external output current of afflux conductor of this lithium-ion electric core; The all overlapping lug glue that is pasted with insulation of tow sides in the middle part of the metal tape of lug; Plastic-aluminum packaging film is wrapped in pole piece; The outer surface of the electric core body that barrier film is formed; When encapsulation; (be heated with lug glue on the lug is welded together the aluminum-plastic packaged film inner layer CPP glue of this outer surface, thereby realizes the sealed package of electric core.In plastic-aluminum packaging film inside electrolyte is housed also, this electrolyte soaks into the space at barrier film and pole piece.
In lithium-ion electric core, anode ear, negative electrode lug are arranged side by side the same end face at the Width of electric core.Lug at present commonly used is for as shown in Figure 1, and this lug comprises metal tape 100 and sticks on the lug glue 102 in the middle part of the metal tape 100 square two sides, the rectangular vertical bar shape of this metal tape.Two ends at this rectangle vertical bar shape metal tape 100 are weld zone 101, the lug glue of pasting at metal tape 100 tow sides 102 during at the plastic-aluminum packaging film plastic packaging and the internal layer CPP glue of plastic-aluminum packaging film be heated and be welded together.
Carrying out lug when being provided with because the width of anode ear, negative electrode lug is subjected to the restriction of electric core width, if when carrying out the lug design, lug is provided with wide; Then the distance between anode ear, the negative electrode lug is narrow; Be short-circuited easily, even it is overlapping lug to take place, can't realizes.
The inventor finds that in carrying out research process of the present invention mainly there is following defective in lithium-ion electric core of the prior art:
Summary of the invention
The embodiment of the invention first purpose is: a kind of lithium ion battery lug is provided, in lithium ion battery, uses the impedance that this lug can reduce lug and pole piece weld, reduce the caloric value of this lug and pole piece weld, avoid the lithium ion battery ballooning.
The embodiment of the invention second purpose is: a kind of lithium-ion electric core is provided, and this lithium-ion electric core, the caloric value of lug and pole piece weld can effectively be avoided the lithium ion battery ballooning.
A kind of lithium ion battery lug that the embodiment of the invention provides, the lug glue that comprises metal tape and stick on the medium position of said metal tape front and reverse side,
Vertical end at said metal tape is provided with a protuberance, and said protuberance is outstanding along the horizontal direction of said metal tape,
Said protuberance along the width of said lateral greater than the width at said metal tape middle part.
Alternatively, also be provided with another protuberance at vertical another terminal part of said metal tape,
Said another protuberance is outstanding along the horizontal direction of said metal tape,
Said another protuberance along the width on the said lateral greater than the width at said metal tape middle part.
Alternatively, the longitudinal cross-section of each said protuberance is rectangular or oval.
Alternatively, each said protuberance along the length of the longitudinal direction of said metal tape less than the width of this said protuberance.
Alternatively, said metal tape is the pure nickel metal tape; Perhaps,
Said metal tape is the pure aluminum metal band; Perhaps,
Said metal tape is made up of copper material inner core and the nickel coating that is wrapped in said copper material inner core periphery.
A kind of lithium-ion electric core that the embodiment of the invention provides comprises: electric core body, anode ear, negative electrode lug, electrolyte, the plastic-aluminum packaging film be made up of positive plate negative plate and barrier film;
Said barrier film is at interval between said positive plate, negative plate;
The lug glue that comprises metal tape respectively and stick on the medium position of said metal tape front and reverse side at said anode ear and negative electrode lug,
Vertical end at each said metal tape is provided with a protuberance, and said protuberance is outstanding along the horizontal direction of this said metal tape, said protuberance along the width of said lateral greater than the width at said metal tape middle part;
The protuberance of said anode ear is welded on the lug weld part of reserving on the said positive plate, and the protuberance of said negative electrode lug is welded on the lug weld part of reserving on the said negative plate;
Sealed being wrapped in the said plastic-aluminum packaging film in one end of said electric core body, electrolyte, anode ear and negative electrode lug and the welding of said positive plate negative plate; Lug glue on said anode ear, the negative electrode lug and the welding mutually of said plastic-aluminum packaging film, the other end of said anode ear, negative electrode lug stretches out outside said plastic-aluminum packaging film.
Alternatively, also be provided with another protuberance at vertical another terminal part of the metal tape of said anode ear and negative pole,
Said another protuberance is outstanding along the horizontal direction of said lug,
Said another protuberance along the width on the said lateral greater than the width at said metal tape middle part.
Alternatively, the longitudinal cross-section of each said protuberance is rectangular or oval.
Alternatively, each said protuberance along the length on the longitudinal direction of said lug less than the width of this said protuberance.
Alternatively, each said metal tape is the pure nickel lug; Perhaps,
Said metal tape is the pure aluminum metal band; Perhaps,
Each said metal tape is made up of copper material inner core and the nickel coating that is wrapped in said copper material inner core periphery.
Therefore; Use the technical scheme of the embodiment of the invention; Because an end of the metal tape of the lug in the lithium-ion electric core of the embodiment of the invention is provided with the wideer protuberance in relative metal tape middle part; When carrying out the welding of lug and pole piece; With the lug weld part welding of reserving on protuberance on this metal tape and the pole piece; Because the width of this protuberance is wideer with respect to the width at metal tape middle part; Be positioned at the inner lug of plastic-aluminum packaging film and the welding region area of pole piece welding position thereby can increase; Reduce the impedance at this place; The heating temp that reduces; Cause the phenomenon of lithium-ion electric core inflatable thereby the electrolyte of avoiding plastic-aluminum packaging film inside is subjected to the temperatures involved vaporization, evidence present embodiment technical scheme is specially adapted to the Soft Roll lithium ion battery of big multiplying power discharging.
In addition; Adopt the technical scheme of present embodiment; Adopt vertical bar shape metal tape to make to be provided with non-vertical bar shape (T font, " 7 " font or other shapes all can) metal tape of protuberance into many decades tradition at least one end of metal tape; Increase that the metal tape end is used for the width (promptly being formed with protuberance) of welding portion and the bonding area that docks welding region that increases lug and pole piece; Adopt this scheme not only to reduce the impedance of this part; Avoid also further having avoided taking place the situation of the overlapping short circuit of lug owing to lug is wide owing to the excessive problem that causes the electrolyte inside high-temperature evaporation aluminum-plastic packaged inflatable to occur of this part caloric value.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, does not constitute to improper qualification of the present invention, in the accompanying drawings:
The lug contour structures sketch map that Fig. 1 uses for a kind of lithium-ion electric core in the prior art;
A kind of lithium ion battery that Fig. 2 provides for inventive embodiments 1 is with the contour structures sketch map of lug;
Fig. 3 is the A-A cross-sectional view of present embodiment 1 lug shown in Figure 2;
The another kind of lug longitudinal profile structural representation that Fig. 4 provides for present embodiment 1;
The another kind of lug contour structures sketch map that Fig. 5 provides for present embodiment 2;
The structural representation of a kind of lithium-ion electric core that Fig. 6 provides for this enforcement 3;
The manufacture craft flow process schematic flow sheet of a kind of lithium-ion electric core that Fig. 7 provides for this enforcement 3;
A kind of lug that Fig. 8 provides for this enforcement 3 pastes the sketch map of lug glue side by side;
The structural representation of a kind of lithium-ion electric core that Fig. 9 provides for this enforcement 4;
Figure 10 is the discharge curve sketch map of the lithium-ion electric core of lithium-ion electric core shown in this enforcement 4 and available technology adopting lug shown in Figure 1.
Embodiment
To combine accompanying drawing and specific embodiment to describe the present invention in detail below, be used for explaining the present invention in this illustrative examples of the present invention and explanation, but not as to qualification of the present invention.
Embodiment 1:
A kind of lithium ion battery that Fig. 2 provides for present embodiment is with the contour structures sketch map of lug 200; During referring to figure; This lug 200 comprises bonding jumper and sticks on the bonding jumper front and the lug glue 203 at reverse side middle part; Lug glue 203 positions on two sides are over against overlapping, and the structure of present embodiment lug 200 and prior art institute difference mainly comprise:
An end of the end of vertical (the X-axis line direction among Fig. 2) of the metal tape 202 in the lug 200 is provided with one along the outstanding protuberance 201 of the horizontal direction of metal tape 202 in the present embodiment, thus make whole metal tape 202 in the width W at protuberance 201 places at metal tape 202 both ends in the width W 2 at metal tape 202 middle parts.Such as: these metal tape 202 integral body " T " word shape structure as shown in Figure 2 perhaps can also be " 7 " word etc.
When using the lug 200 manufacturing lithium ion batteries of present embodiment, the metal tape in the lug 200 202 can be provided with protuberance 201 and be welded on the lug weld part place that reserves on the pole piece.Such as: the protuberance 201 of metal tape 202 is welded on the lug weld part place that reserves on the positive plate, and this lug 200 has become anode ear; Metal tape 202 protuberances 201 are welded on the lug weld part place that reserves on the negative plate, and this lug 200 has become negative electrode lug.
Therefore; Adopt the present embodiment technical scheme; Because an end of the metal tape 202 in the lug 200 is provided with the wideer protuberance 201 in relative metal tape 202 middle parts; When carrying out the welding of lug 200 and pole piece; With the lug weld part welding of reserving on this protuberance 201 and the pole piece; Because the width of these metal tape 202 terminal protuberances 201 is wideer; Thereby increase the welding region area that is positioned at plastic-aluminum packaging film inner lug 200 and pole piece; Can reduce the impedance at this place; Thereby the heating temp that reduces; Avoid the electrolyte of plastic-aluminum packaging film inside to be subjected to the temperatures involved vaporization and to cause the lithium-ion electric core ballooning, evidence present embodiment technical scheme is specially adapted to the Soft Roll lithium ion battery of big multiplying power discharging.
In addition, adopt the technical scheme of present embodiment, with non-vertical bar shape (T font, " 7 " font or other shapes all can) metal tape 202 that makes to be provided with protuberance 201 into of the vertical bar shape metal tape of many decades Traditional use at least one end of metal tape.Through increasing the width that metal tape 202 ends are used for welding portion; And increase the bonding area that docks welding region of lug 200 and pole piece; Reduce the impedance of this part; Avoid causing the electrolyte inside high-temperature evaporation aluminum-plastic packaged inflatable problem to occur, can avoid again owing to the lug 200 wide situation that the overlapping short circuit of lug takes place owing to this part caloric value is excessive.
The inventor also finds in carrying out research process of the present invention; The pure nickel strip metal band that lug is commonly used in the prior art has the advantage that flexibility is strong, non-oxidizability is strong; But the impedance of pure nickel strip metal band is higher; Cause lithium-ion electric core higher in the energy consumption of lug and pole piece weld; The inventor finds that through the experimental study to lug 200 this lug 200 can also adopt technical scheme:
Fig. 3 shows referring to Fig. 3 for a kind of lug 200 longitudinal profile structural representations that present embodiment provides, and this metal tape 300 is made up of pure nickel core portion 301 and the pure-nickel-layer 302 that is wrapped in pure nickel core portion 301.Make lug 200 both reduce the impedance of lug 200, and the outer peripheral portion that is used for bending and welding have good flexibility and non-oxidizability.
The inventor also finds in carrying out research process of the present invention; Pure nickel bar lug metal tape 200 commonly used in the prior art has the advantage that flexibility is strong, non-oxidizability is strong; But its impedance is higher, causes lithium-ion electric core higher relatively in the energy consumption at lug metal tape 200 places.
The inventor is through discovering that to the analytical test of lug metal tape of the prior art this lug 200 can also adopt technical scheme:
The longitudinal profile structural representation of a kind of lug 200 that Fig. 3 provides for present embodiment.Show that referring to Fig. 3 this lug 200 comprises metal tape and lug glue 303, metal tape 302 is made up of pure nickel core portion 301 and the pure nickel coating 302 that is wrapped in pure nickel core portion 301.Adopt the metal tape of said structure to help reducing the impedance of lug 200, and guarantee that the outer peripheral portion that is used for bending and welding has good flexibility and non-oxidizability.
The profile that is arranged on the terminal protuberance 201 of the metal tape of lug in the present embodiment both can be as shown in Figure 2 rectangle; Also can be as shown in Figure 4; This lug comprises metal tape 402 and lug glue 403, and ovalize is arranged on protuberance 401 surfaces on this metal tape.
In practical application; Can but to be not limited to that the protuberance on this metal tape 201 (401) is arranged to extend toward the both sides of the horizontal direction (Y direction) of metal tape outstanding length identical; Even it becomes symmetric relation with longitudinal axis of metal tape to (directions X), the cutting out and the actual welding operation of the metal tape of being more convenient for like this.
Embodiment 2:
The another kind of lug contour structures sketch map that Fig. 5 provides for present embodiment; Referring to shown in Figure 5; Present embodiment lug 500 comprises metal tape 504 and sticks on lug glue 503 metal tape front and reverse side, overlapping that present embodiment lug 500 comprises as follows with prior art institute difference:
Both ends at the metal tape 503 of present embodiment are provided with the protuberance 501,502 shown in embodiment 1.Referring to shown in Figure 5, the both ends of this metal tape 503 have one " T " protuberance 501,502 from shape respectively, make these metal tape 503 integral body be " worker " word shape.
In present embodiment figure, be that example describes present embodiment with the lug that adopts integral body to be the metal tape 504 of " worker " word shape, but be not limited to this.Such as: as described in example 1 above in like manner; The protuberance 501,502 of 504 liang of ends of this metal tape this end one end be " T " thus word makes these metal tape 504 integral body be " worker " font; Or the protuberance 501,502 of 504 liang of ends of this metal tape is " 7 " font at this end one end; Also can be other shapes, the width that protuberance 501,502 width of 504 liang of ends of this metal tape are wider than the middle part of this metal tape 504 is got final product.
The surface configuration of this both ends protuberance 501,502 both can be rectangular also can ovalize, specifically can be according to actual design.
When using; The lug 500 of present embodiment is except having the beneficial effect shown in the embodiment 1; Also because metal tape 504 vertical two ends of this lug 500 are provided with the protuberance 501,502 that width is wider than metal tape 504 middle part width; Then not only lug 500 is less with the impedance of the weld part of pole piece welding; Caloric value is lower; And the external weld part surface area of each lug 500 other end is increased; Further help reducing impedance; Cut down the consumption of energy; Further help the welding procedure operation of this end, be convenient to welding procedure and implement.
Above-mentioned 501,502 pairs of external weldings of metal tape 504 other end protuberances with lug 500, specifically such as:
The series connection of each lithium-ion electric core then need be made protuberance 501,502 welding of anode ear and negative electrode lug, welding in turn, head and the tail two anode ears after connecting the most at last, negative pole and externally cause the protective circuit of lithium ion battery.
Need be with each lithium-ion electric core parallel connection, then with protuberance 501,502 welding of anode ear and anode ear, protuberance 501,502 welding of negative electrode lug and negative electrode lug externally lead to protective circuit.With the anode ear after the parallel connection, negative pole and externally cause the protective circuit of lithium ion battery.
In the present embodiment, as among the embodiment 1 in like manner, the metal tape 500 of this lug both can be the pure nickel metal tape, can also adopt the pure aluminum metal band, can also in like manner adopt structure shown in Figure 3 with embodiment 1:
Metal tape is made up of pure nickel core portion 301 and the pure nickel coating 302 that is wrapped in pure nickel core portion.。Adopt the lug of the metal tape 200 of this structure to help reducing the impedance of lug, and the outer peripheral portion that guarantees to be used for the metal tape of bending and welding have good flexibility and non-oxidizability.
Embodiment 3:
The structural representation of a kind of lithium-ion electric core that Fig. 6 provides for this enforcement.The lithium-ion electric core that present embodiment provides adopts the lug 200 of embodiment 1 structure.
Referring to shown in Figure 6, this lithium-ion electric core mainly comprises positive plate, negative plate, barrier film, electrolyte, anode ear 601, negative electrode lug 602, plastic-aluminum packaging film 603.Its concrete structure is:
Barrier film is at interval between every positive plate and negative plate; Anode ear 601; Negative electrode lug 602 is welded on positive plate respectively; The lug weld part of reserving on the negative plate; At anode ear 601; The front at the middle part of the bonding jumper of negative electrode lug 602 and reverse side all post lug glue 605 (insulating material of nylon); The location overlap of this lug glue 605 over against; The plastic-aluminum packaging film 603 outer positive plates that wrap in; Negative plate and barrier film form the periphery of electric core body 604 (its can but be not limited to coiling body or lamination body); Electrolyte is poured in the enclosed cavity of plastic-aluminum packaging film 603 formation; Make positive plate; Negative plate and barrier film are immersed in the electrolyte; Anode ear 601; The lug glue 605 of negative electrode lug 602 is positioned at the end of electric core body 604; Make when plastic-aluminum packaging film 603 hot pressing plastic packagings; This lug glue 605 is welded together with plastic-aluminum packaging film 603, and realizes sealing.
Present embodiment lug 601,602 and lug of the prior art institute difference mainly comprise:
Therefore; Adopt the present embodiment technical scheme; Since the metal tape in the lug of this lithium-ion electric core be provided with the wideer protuberance 6011 in middle part of relative metal tape with end; 6021; Carrying out lug 601; 602 during with the welding of pole piece; With each lug 601; 602 protuberances 6011; 6021 with pole piece on the lug weld part welding reserved; Because the protuberance 6011 that this lug metal tape is terminal; 6021 width is wideer with respect to the width at metal tape middle part; This be can increase greatly with respect to prior art and the lug 200 of plastic-aluminum packaging film 603 inside and the welding region area of pole piece are positioned at; Reduce the impedance at this place; Thereby the heating temp that reduces; Avoid the inner electrolyte of plastic-aluminum packaging film 603 to be subjected to the temperatures involved vaporization and cause the phenomenon of lithium-ion electric core bulge inflatable, evidence present embodiment technical scheme is specially adapted to the Soft Roll lithium ion battery of big multiplying power discharging.
In addition; Adopt the technical scheme of present embodiment; The vertical bar shape lug bonding jumper that many decades is traditional makes into: at least one end at bonding jumper is provided with protuberance 6011; 6021 non-vertical bar shape metal tape (T font; " 7 " font or other shapes all can); Increase the bonding area that docks welding region of lug and pole piece through increasing width that the metal tape end is used for the protuberance of welding portion; Reduce the impedance of lug; Avoid having avoided taking place the situation of the overlapping short circuit of lug again owing to lug is wide owing to the excessive problem that causes the electrolyte inside high-temperature evaporation aluminum-plastic packaged inflatable to occur of this part caloric value.
In the present embodiment, the internal structure that is arranged on the terminal protuberance 6011,6021 of the metal tape of lug 601,602 can be referring to the description among the embodiment 1:
This lug 601,602 both can be the pure nickel band structure, was fine aluminium nickel strap structure, can also adopt structure shown in Figure 3: lug is made up of pure nickel core portion and the pure nickel coating that is wrapped in pure nickel core portion.Adopt this double-deck lug metal tape both to help reducing the impedance of lug, and help guaranteeing that the outer peripheral portion that is used for bending and welding has good flexibility and non-oxidizability.
In addition, with embodiment 1 in like manner, the profile of the terminal protuberance 6011,6021 of metal tape both can be as shown in Figure 2 rectangle, also can as shown in Figure 4 ovalize etc. be arranged on its surface.
In practical application; Can but to be not limited to that outstanding length is extended on the both sides that this protuberance 6011,6021 is arranged to the horizontal direction (Y direction) along metal tape identical; Even it becomes symmetric relation along longitudinal axis of metal tape to (directions X), the cutting out and welding operation of the lug metal tape of being more convenient for like this.
The manufacture craft flow process of the lithium-ion electric core in the present embodiment can but be not limited to adopt flow process shown in Figure 7.Specifically comprise:
Step 701: electric core body 604 is made.
Specifically be to make the electric core body 604 that is made up of positive plate, negative plate, barrier film, making that wherein should electricity core body 604 can be selected winding process or lamination manufacturing process as the case may be for use.
Step 702: lug glue 605 is pasted at the middle part at the lug metal tape.
In this step, can adopt the mode of pasting in batches to carry out:
At first, n bar double faced adhesive tape is attached on the offset plate that is printed on scale, then a lug glue 605 is attached on request on the offset plate of existing double faced adhesive tape;
Then, with the metal tape of present embodiment, by with the direction of above-mentioned lug glue 605 quadratures, be uniformly arranged and fixed abreast on the offset plate that posts lug glue 605 in advance, and make the distance of each adjacent metal band reach predetermined interval.Make lug glue 605 be attached to the bottom surface at the middle part of metal tape.
Again then, another lug glue 605 is attached to the end face of metal tape, the lug glue 605 of top side location and lug glue 605 positions that are positioned at this metal tape bottom surface are over against overlapping symmetry.
At last; The carrier offset plate of lug glue 605 and metal tape will be posted; Put into the hot melt hot press and carry out hot pressing; Make two lug glue 605 of metal tape and center end face and bottom surface combine firmly; Specifically obtain the lug sequence of structure shown in Figure 8; Rectangular lug glue 605 can be cut open through cutting then, to obtain posting the lug of lug glue 605 at the positive and negative middle part of metal tape.
Step 703: the welding of lug and pole piece.
Specifically be that step 702 is pretreated, the protuberance 6011,6021 at the lug end that posts lug glue 605 on the metal tape in advance is welded to lug welding position predetermined on the pole piece respectively with passing through.
The lug that is welded on positive plate is an anode ear 601, and the lug that is welded on the negative plate is a negative electrode lug 602.
In this step can but be not limited to adopt Laser Welding technology usual in the prior art, the protuberance on the lug 6011,6021 is welded on the reservation welding position of pole piece.
At this moment, the protuberance 6011,6021 of lug is welded on the reservation lug welding position of pole piece, and the other end is given prominence to outside electric core body 604, for to external welding.
Step 704: plastic-aluminum packaging film packing, heat-sealing.
At electric core body 604 outerwrap plastic-aluminum packaging films 603, and carry out hot-pressing processing, make lug glue 605 on this plastic-aluminum packaging film 603 and the lug the CPP layer be welded together the realization hot sealing with the CPP layer of aluminum plastic film.
At this moment; Electricity core body 604 and lug 200 are encapsulated in the cavity of plastic-aluminum packaging film 603 formation with an end of pole piece welding; The lug glue 605 at metal tape middle part is welded together with plastic-aluminum packaging film 603, and the other end of metal tape stretches out outside plastic-aluminum packaging film 603.
Step 705: fluid injection.
Under vacuum condition, electrolyte is poured into to the cavity of plastic-aluminum packaging film 603 formation, electric core body 604 is immersed in the electrolyte.
Concrete fluid injection operation can but do not limit according to fluid injection operation of the prior art and carry out.
Step 706: fluid injection final vacuum sealing.
After step 705, carry out the sealing of fluid injection final vacuum.
Obtain the lithium-ion electric core entity of present embodiment at last.
Embodiment 4:
The structural representation of a kind of lithium-ion electric core that Fig. 9 provides for this enforcement.The lithium-ion electric core that present embodiment provides adopts the lug 901,902 of structure shown in the embodiment 2.
3 differences of the lithium-ion electric core of present embodiment and embodiment only are:
Lug 901,902 in the present embodiment is provided with protuberance 9011,9012,9021,9022 at vertical two ends of metal tape, and promptly present embodiment adopts the lug 901,902 of structure shown in the embodiment 2.
The structure of lug 901,902 is not given unnecessary details at this specifically referring to the record among the embodiment 2.
With among the embodiment 2 in like manner; The lithium-ion electric core of present embodiment is except having embodiment 3 described beneficial effects; Also because this lug 901; 902 vertical two ends at metal tape are provided with the protuberance 9011 that width is wider than metal tape middle part width; 9012; 9021; 9022; Protuberance 9011 not only then; 9021 is less with the impedance of pole piece end welding welding position; Caloric value is lower; And make each lug 901; 902 at another terminal protuberance 9012 of metal tape; 9022 is bigger with the welding region area of outside weldings; Further help reducing impedance; Cut down the consumption of energy; Further help the welding procedure operation of this end, be convenient to welding procedure and implement.
The test data Comparative Examples:
Below adopting and making * * 3496-30C-2200mAh lithium-ion electric core is example.
Comparative Examples: lithium-ion electric core adopts routine " 1 " font lug shown in Figure 1;
Test example: lithium-ion electric core adopt shown in the embodiment of the invention 2 with " worker " font lug, the middle part width of this lug is identical with above-mentioned " 1 " font lug width.
Make lithium-ion electric core respectively; Bonding area all is the maximum area of lug end respectively; The discharging current of lithium-ion electric core is 44A; With raising sub-its internal resistance value of internal resistance test device test; Infrared temperature tester test battery discharge temp; Discharging efficiency, discharge platform/intermediate value with new prestige detecting box test battery; Obtain lug lithium ion discharge curve shown in Figure 10; Wherein curve 1001 is the discharge curve of the lithium-ion electric core of Comparative Examples, and curve 1002 is the discharge curve of the lithium-ion electric core of test example of the present invention.In discharge process, record the unit for electrical property parameters shown in the following table.
Table one: instance test result contrast table
Visible from Figure 10, in the lithium-ion electric core discharge process, adopt its discharge voltage of lithium-ion electric core of present embodiment structure lower with the decline rate of change of discharge capacity.
The result of associative list one is visible; Under identical test condition; With respect to prior art; Adopt " worker " font lug of the embodiment of the invention; The internal resistance of lithium ion battery has reduced by 10.07%; Discharge temp has reduced by 13 ℃, and discharging efficiency has improved 4.13%, and threshold voltage has improved 0.063v in the discharge.
To sum up, adopt embodiment of the invention technical scheme to change the internal resistance that can reduce lithium ion greatly, reduce the internal resistance of lithium ion battery, reduce the discharge temp of lithium ion battery, improve the discharging efficiency of lithium-ion electric core through lug design cleverly.
More than the technical scheme that the embodiment of the invention provided has been carried out detailed introduction; Used concrete example among this paper the principle and the execution mode of the embodiment of the invention are set forth, the explanation of above embodiment only is applicable to the principle that helps to understand the embodiment of the invention; Simultaneously, for one of ordinary skill in the art, according to the embodiment of the invention, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. a lithium ion battery lug is characterized in that, the lug glue that comprises metal tape and stick on the medium position of said metal tape front and reverse side,
Vertical end at said metal tape is provided with a protuberance, and said protuberance is outstanding along the horizontal direction of said metal tape,
Said protuberance along the width of said lateral greater than the width at said metal tape middle part.
2. lithium ion battery lug according to claim 1 is characterized in that,
Also be provided with another protuberance at vertical another terminal part of said metal tape,
Said another protuberance is outstanding along the horizontal direction of said metal tape,
Said another protuberance along the width on the said lateral greater than the width at said metal tape middle part.
3. lithium ion battery lug according to claim 1 and 2 is characterized in that,
The longitudinal cross-section of each said protuberance is rectangular or oval.
4. lithium ion battery lug according to claim 1 and 2 is characterized in that,
Each said protuberance along the length of the longitudinal direction of said metal tape less than the width of this said protuberance.
5. lithium ion battery lug according to claim 1 and 2 is characterized in that,
Said metal tape is the pure nickel metal tape; Perhaps,
Said metal tape is the pure aluminum metal band; Perhaps,
Said metal tape is made up of copper material inner core and the nickel coating that is wrapped in said copper material inner core periphery.
6. a lithium-ion electric core is characterized in that, comprising: electric core body, anode ear, negative electrode lug, electrolyte, the plastic-aluminum packaging film be made up of positive plate negative plate and barrier film;
Said barrier film is at interval between said positive plate, negative plate;
The lug glue that comprises metal tape respectively and stick on the medium position of said metal tape front and reverse side at said anode ear and negative electrode lug,
Vertical end at each said metal tape is provided with a protuberance, and said protuberance is outstanding along the horizontal direction of this said metal tape, said protuberance along the width of said lateral greater than the width at said metal tape middle part;
The protuberance of said anode ear is welded on the lug weld part of reserving on the said positive plate, and the protuberance of said negative electrode lug is welded on the lug weld part of reserving on the said negative plate;
Sealed being wrapped in the said plastic-aluminum packaging film in one end of said electric core body, electrolyte, anode ear and negative electrode lug and the welding of said positive plate negative plate; Lug glue on said anode ear, the negative electrode lug and the welding mutually of said plastic-aluminum packaging film, the other end of said anode ear, negative electrode lug stretches out outside said plastic-aluminum packaging film.
7. lithium-ion electric core according to claim 1 is characterized in that,
Vertical another terminal part at the metal tape of said anode ear and negative pole also is provided with another protuberance,
Said another protuberance is outstanding along the horizontal direction of said lug,
Said another protuberance along the width on the said lateral greater than the width at said metal tape middle part.
8. according to claim 6 or 7 described lithium-ion electric cores, it is characterized in that,
The longitudinal cross-section of each said protuberance is rectangular or oval.
9. according to claim 6 or 7 described lithium-ion electric cores, it is characterized in that,
Each said protuberance along the length on the longitudinal direction of said lug less than the width of this said protuberance.
10. according to claim 6 or 7 described lithium-ion electric cores, it is characterized in that,
Each said metal tape is the pure nickel lug; Perhaps,
Said metal tape is the pure aluminum metal band; Perhaps,
Each said metal tape is made up of copper material inner core and the nickel coating that is wrapped in said copper material inner core periphery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110262704A CN102306735A (en) | 2011-09-06 | 2011-09-06 | Lithium ion electrical core and lug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110262704A CN102306735A (en) | 2011-09-06 | 2011-09-06 | Lithium ion electrical core and lug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102306735A true CN102306735A (en) | 2012-01-04 |
Family
ID=45380567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110262704A Pending CN102306735A (en) | 2011-09-06 | 2011-09-06 | Lithium ion electrical core and lug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102306735A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105283997A (en) * | 2013-11-25 | 2016-01-27 | 积水化学工业株式会社 | Method and device for manufacturing layered cell and layered cell |
| JP2016531405A (en) * | 2013-09-02 | 2016-10-06 | エルジー・ケム・リミテッド | Electrode tap welding method for secondary battery and electrode assembly manufactured using the same |
| CN106784582A (en) * | 2017-02-17 | 2017-05-31 | 湖南格瑞普新能源有限公司 | Suitable for the lithium ion battery and pole piece of big multiplying power discharging |
| CN108496269A (en) * | 2016-11-02 | 2018-09-04 | 株式会社Lg化学 | electrode assembly and method for manufacturing the electrode assembly |
| CN108565388A (en) * | 2018-04-17 | 2018-09-21 | 江苏九蓝新能源科技有限公司 | A kind of nickel-clad copper turns aluminium pole ears and its welding method |
| CN111916833A (en) * | 2020-06-24 | 2020-11-10 | 惠州锂威新能源科技有限公司 | Preparation method of soft package lithium ion battery cell, battery cell and battery module |
| CN113966567A (en) * | 2021-03-24 | 2022-01-21 | 宁德新能源科技有限公司 | Battery cell and power utilization device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1782011A (en) * | 2004-12-03 | 2006-06-07 | 中国电子科技集团公司第十八研究所 | Thermosol and soft package lithium ion cell polar ear containing said thermosol |
| CN101154744A (en) * | 2006-09-30 | 2008-04-02 | 江苏双登集团有限公司 | Lithium ion battery and manufacturing method thereof |
| CN201717302U (en) * | 2010-07-29 | 2011-01-19 | 深圳市东方华联科技有限公司 | Lithium ion battery tag and lithium ion battery |
| CN202231088U (en) * | 2011-09-06 | 2012-05-23 | 深圳市格瑞普电池有限公司 | Lithium ion battery core and polar lug |
-
2011
- 2011-09-06 CN CN201110262704A patent/CN102306735A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1782011A (en) * | 2004-12-03 | 2006-06-07 | 中国电子科技集团公司第十八研究所 | Thermosol and soft package lithium ion cell polar ear containing said thermosol |
| CN101154744A (en) * | 2006-09-30 | 2008-04-02 | 江苏双登集团有限公司 | Lithium ion battery and manufacturing method thereof |
| CN201717302U (en) * | 2010-07-29 | 2011-01-19 | 深圳市东方华联科技有限公司 | Lithium ion battery tag and lithium ion battery |
| CN202231088U (en) * | 2011-09-06 | 2012-05-23 | 深圳市格瑞普电池有限公司 | Lithium ion battery core and polar lug |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10434595B2 (en) | 2013-09-02 | 2019-10-08 | Lg Chem, Ltd. | Method for welding electrode tab of secondary battery and electrode assembly manufactured using same |
| JP2016531405A (en) * | 2013-09-02 | 2016-10-06 | エルジー・ケム・リミテッド | Electrode tap welding method for secondary battery and electrode assembly manufactured using the same |
| TWI635641B (en) * | 2013-11-25 | 2018-09-11 | 日商積水化學工業股份有限公司 | Method for producing laminate battery, and laminate battery |
| CN105283997B (en) * | 2013-11-25 | 2017-10-27 | 积水化学工业株式会社 | The manufacture method and manufacture device of stacked battery, stacked battery |
| US9985319B2 (en) | 2013-11-25 | 2018-05-29 | Sekisui Chemical Co., Ltd. | Method for producing laminate battery, apparatus for producing laminate battery, and laminate battery |
| CN105283997A (en) * | 2013-11-25 | 2016-01-27 | 积水化学工业株式会社 | Method and device for manufacturing layered cell and layered cell |
| CN108496269A (en) * | 2016-11-02 | 2018-09-04 | 株式会社Lg化学 | electrode assembly and method for manufacturing the electrode assembly |
| CN108496269B (en) * | 2016-11-02 | 2021-06-11 | 株式会社Lg化学 | Electrode assembly and method for manufacturing the same |
| CN106784582A (en) * | 2017-02-17 | 2017-05-31 | 湖南格瑞普新能源有限公司 | Suitable for the lithium ion battery and pole piece of big multiplying power discharging |
| CN108565388A (en) * | 2018-04-17 | 2018-09-21 | 江苏九蓝新能源科技有限公司 | A kind of nickel-clad copper turns aluminium pole ears and its welding method |
| CN111916833A (en) * | 2020-06-24 | 2020-11-10 | 惠州锂威新能源科技有限公司 | Preparation method of soft package lithium ion battery cell, battery cell and battery module |
| CN113966567A (en) * | 2021-03-24 | 2022-01-21 | 宁德新能源科技有限公司 | Battery cell and power utilization device |
| CN113966567B (en) * | 2021-03-24 | 2023-06-20 | 宁德新能源科技有限公司 | Battery core and electricity utilization device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102306735A (en) | Lithium ion electrical core and lug | |
| CN202231088U (en) | Lithium ion battery core and polar lug | |
| JP5079782B2 (en) | Soft package large capacity lithium ion battery and method of manufacturing the same | |
| JP4565810B2 (en) | Laminated battery | |
| CN103579666B (en) | A kind of low internal resistance compound lithium ion battery core and manufacture craft thereof | |
| JP5422842B2 (en) | Electrochemical devices | |
| KR102488346B1 (en) | Battery pack | |
| CN205376656U (en) | Secondary battery | |
| CN101593849A (en) | A kind of lithium battery and manufacture method thereof | |
| CN104681878B (en) | The preparation method and coiled lithium ion battery of a kind of coiled lithium ion battery | |
| JP2014026980A (en) | Electrochemical device | |
| CN106450497A (en) | Multi-roll-core double-lug soft-package battery and production method thereof | |
| CN109273776B (en) | Battery cell film bag packaging method, battery preparation method and battery | |
| CN102437377A (en) | Winding power core, soft-package lithium ion battery and pole piece | |
| CN203085704U (en) | Lithium ion battery | |
| CN210052786U (en) | Lithium ion battery tab and lithium ion battery | |
| CN107546421A (en) | Takeup type battery core | |
| CN110391356A (en) | Battery | |
| JP4655554B2 (en) | Power storage module and manufacturing method thereof | |
| CN201536135U (en) | Lithium battery | |
| CN106992313B (en) | Secondary battery | |
| CN206558602U (en) | Battery core pole piece and battery core | |
| CN202159711U (en) | Cylinder-shaped battery with flexible package | |
| JP2016536770A (en) | Secondary battery with low resistance electrode tab | |
| CN107302110A (en) | Takeup type battery core |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120104 |