CN202487688U - Lithium ion battery - Google Patents
Lithium ion battery Download PDFInfo
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- CN202487688U CN202487688U CN2012201029287U CN201220102928U CN202487688U CN 202487688 U CN202487688 U CN 202487688U CN 2012201029287 U CN2012201029287 U CN 2012201029287U CN 201220102928 U CN201220102928 U CN 201220102928U CN 202487688 U CN202487688 U CN 202487688U
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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
Abstract
The utility model relates to the field of lithium ion battery design and discloses a lithium ion battery. A battery pack body, a positive electrode lug and a negative electrode lug are arranged in a shell, the positive electrode lug and the negative electrode lug are arranged at the end part of the battery pack body; a first metal rod and a second metal rod respectively pass through the wall of the shell, soldering tin concave parts are respectively arranged at the tail ends of the first metal rod and the second metal rod, a wire incoming hole is respectively arranged on the wall of each soldering tin concave part, the positive electrode lug is connected with one end of a first lead, and a metal core part at the other end of the first lead penetrates through the wire incoming hole of the first metal rod and is fixedly connected with soldering tin in the corresponding soldering tin concave part; the negative electrode lug is connected with one end of a second lead and the metal core part of the other end of the second lead penetrates through the wire incoming hole of the second metal rod and is fixedly connected with the soldering tin in the corresponding soldering tin concave part; and the tail ends of the first metal rod and the second metal rod outside the shell are further respectively provided with output hole parts which are longitudinally sunk along the first metal rod and the second metal rod, and a thread is arranged on the inner wall of the at least one output part. The lithium ion battery disclosed by the utility model has the higher structure stability and is beneficial to improving the safety of the lithium ion battery pack.
Description
Technical field
The utility model relates to the lithium ion battery design field, relates in particular to a kind of lithium ion battery group.
Background technology
In recent years; Along with the fast development of electric tool, electronic toy, the model of an airplane, electric motor car, power sources such as traditional lead-acid battery, nickel-cadmium cell, Ni-MH battery can not adapt to the requirement of these equipment to power source owing to the problem of Heavy Weight, not environmental protection.
Lithium ion battery is the energy of the present green reusable edible of extensively promoting; For electric tool, electronic toy, the model of an airplane, electric motor car are used; Instantaneous, continuously big current work requirement that these equipment have; That have even require 30C, 35C discharge, along with development of science and technology, also can require higher discharge-rate in the future.
Constitute the high multiplying power lithium ion battery group by series connection of a plurality of cells or parallel connection because have that capacity is big, in light weight, volume is little, characteristics such as memory-less effect, self discharge are little, have extended cycle life, it just progressively replaces power source such as traditional lead-acid battery, nickel-cadmium cell, Ni-MH battery and is widely used in fields such as above-mentioned electric tool, electronic toy, the model of an airplane, electric motor car.
The structure of the lithium ion battery group of encapsulation is mainly as shown in Figure 1 at present, and visible by figure, present lithium ion battery group mainly comprises housing 001, keyset (pcb board) 002, battery pack body 003 and the output metal tube 004,005 that is used for output current.The cross section of two output metal tubes 004,005 is annular, and metal pipe-wall thickness is 0.5 millimeter.
Wherein, the end of battery pack body leads to anode ear 0061, negative electrode lug 0062, and keyset 002 is arranged on the top, end that battery pack body 003 is drawn lug 0061,0062, and this keyset 002 is provided with a plurality of independently tinsels 0021.When assembling, through soldering anode ear 0061 is welded on an end of the tinsel 0021 of keyset 002, output metal tube 004 soldering and the other end soldering of its lower end first tinsel 0021 are welded.In like manner, anode ear 0062 is welded on an end of the tinsel 0021 of keyset 002, another output metal tube 005 soldering and the other end 0021 soldering of the tinsel of its lower end are welded through soldering.
Electric current in the battery pack body 003 is logical to flow out from anode ear 0061, offers the output metal tube through the tinsel 0021 on the keyset 002 of its end welding.When using, the user can realize power supply output power supply with the through hole that the both positive and negative polarity of the power input terminal of power consumption equipment is inserted into the output of two on this lithium ion battery group housing metal tube 004,005 respectively.
The inventor finds in the research process that carries out the utility model, the defective below the lithium ion battery group structure of prior art exists:
1, the electric current of the battery pack body of prior art output exports the output metal tube to through the tinsel 0021 on lug, output metal tube 004, the 005 soldering keyset 002 in order, and power supply output.In the soldering production process, the employee operates the inconsistent phenomenon that has dry joint or rosin joint, can cause the internal resistance of lithium ion battery group sharply to increase, and discharging efficiency is lower, causes shorten the useful life of lithium ion battery group.
2, the intrinsic internal resistance of lithium ion battery group of the prior art is bigger, causes the discharging efficiency of lithium ion battery group lower,
3, in use the heating at the power output terminal place of long period heavy-current discharge lithium ion battery group of the prior art is big; The housing fusing appears; And the internal resistance of lithium ion battery group continues to raise; The guiding discharge utilance reduces, and can not export for the power supply that provides good that continues to run up of power consumption equipment well.
The utility model content
The utility model embodiment first purpose is to provide a kind of lithium ion battery, and its structural stability is higher, helps improving the fail safe of lithium ion battery group.
A kind of lithium ion battery that the utility model embodiment provides comprises:
Housing, battery pack body, first metal bar, second metal bar, first lead and second lead, wherein,
Said battery pack body, anode ear, negative electrode lug are installed in the said housing,
The end of said battery pack body is provided with anode ear, negative electrode lug;
Said first metal bar, second metal bar run through a shell wall of said housing respectively,
The end that said first metal bar, second metal bar are positioned at housing is respectively equipped with: one along the vertical recessed scolding tin recess of this metal bar, on the hole wall of each said scolding tin recess, is respectively arranged with: an entrance hole;
One end of said first lead is connected with said anode ear, and the metal core of the said first lead other end runs through the entrance hole of said first metal bar, and is fixedly connected with scolding tin in the scolding tin recess that is set in said first metal bar fullly;
One end of said second lead is connected with said negative electrode lug, and the metal core of the said second lead other end runs through the entrance hole of said second metal bar, and is fixedly connected with scolding tin in the scolding tin recess that is set in said second metal bar fullly;
Said first metal bar, second metal bar are positioned at the outer end of said housing and also are respectively arranged with: along the vertical recessed delivery outlet portion of this metal bar, be provided with screw thread at the inwall of arbitrary at least said delivery outlet portion.
Alternatively, the inwall in each said delivery outlet portion is provided with: screw thread.
Alternatively, also comprise:
Anodal output distribution, negative pole output distribution are made up of the lead that metal bar link and periphery are enclosed with insulating barrier respectively,
The metal bar link of said anodal output distribution, negative pole output distribution can screw in the delivery outlet portion of said first metal bar, second metal bar respectively.
Alternatively, on said first metal bar, second metal bar, other positions except that said delivery outlet portion, scolding tin recess are solid.
Alternatively, the metal core of said first lead, second lead is: copper cash or copper stranded conductor,
The protective sleeve that is positioned at each said metal core periphery is: polyamide fibre braiding insulating barrier.
Alternatively, the periphery cross section of said first metal bar and/or second metal bar is: gear-like or rectangle or hexagon.
Alternatively, post at the outer surface of said housing: two coloured films,
Two said coloured films are surrounded on position, the hole periphery of said first metal bar, second metal bar respectively.
Therefore, use the technical scheme of the utility model embodiment, desirable following beneficial effect:
Removed keyset of the prior art in the present embodiment; And adopted big ampere wires to connect lug and the metal bar that is applied to mutually export, and be provided with the scolding tin recess at the end that metal bar is positioned at housing, the hole wall in this scolding tin room is provided with entrance hole; Making the metal core of the big ampere wires that is connected with anode ear, negative electrode lug respectively can run through entrance hole stretches in the scolding tin recess; In the scolding tin recess, is connected with second metal bar through abundant soldering fixation ground, wherein scolding tin is and fills the shape filling and be set in the scolding tin recess of second metal bar, makes big ampere wires directly stretch into the inside of lead-out terminal (first metal bar, second metal bar) and links together; Make that connection each other is more firm; Connect more fully, with respect to both outside directly connected modes of welding, employing this programme helps further reducing the whole internal resistance of battery pack; Improve discharging efficiency, improve heat dispersion.
Substitute mode with respect to the available technology adopting keyset; Adopt the present embodiment scheme; Circuit between the output leads component (first metal bar, second metal bar) of the positive and negative lug that makes on the one hand battery pack body to the housing connects and is easier to operation; And connect more firmly, be not easy to come off, loosening, and then help improving fail safe, the stability in production, the application process.
Further; In the delivery outlet portion of the outer end of the lead-out terminal on housing (first metal bar, second metal bar) screw thread is set; Like this when using; Can adopt suitable with it metal bar link to be provided with the adaptive externally threaded output distribution of internal thread with the position of portalling, the delivery outlet portion that its metal bar link is fully screwed in corresponding lead-out terminal gets final product.With respect to connected modes such as level and smooth insertions, can export in the present embodiment and be connected closelyr between distribution and the lead-out terminal, help reducing the output internal resistance, improve discharging efficiency, improve heat dispersion; And adopt this mode that spins also to make the power supply line between lead-out terminal and the power consumption equipment more firm, be not easy to come off, make its application safer, stable.
Description of drawings
Accompanying drawing described herein is used to provide the further understanding to the utility model, constitutes the application's a part, does not constitute the improper qualification to the utility model, in the accompanying drawings:
The primary structure sketch map of a kind of lithium ion battery group that Fig. 1 provides for prior art;
Fig. 2 is interior each the member connection structure front view of a kind of lithium-ion battery shell of the utility model embodiment 1;
Fig. 3 is the perspective view of Fig. 2;
Fig. 4 is the local structure for amplifying sketch map of top section among Fig. 3;
Fig. 5 is the perspective view of first metal bar among Fig. 2-4, second metal bar;
Fig. 6 is another perspective view of first metal bar shown in Figure 5, second metal bar;
Fig. 7 is the part section structural representation of first metal bar shown in Figure 5, second metal bar;
Fig. 8 be can with Fig. 2 lithium ion battery adaptive just/structural representation of negative pole output distribution;
Fig. 9 is a present embodiment test result discharge curve contrast sketch map.
Reference numeral:
Housing: 001; Keyset: 002; Tinsel: 0021; Battery pack body: 003;
Housing: 101; Battery pack body: 102; First metal bar: 1031;
Second metal bar: 1032; Delivery outlet portion 1033:; Screw thread: 1034;
Scolding tin recess: 1035; Entrance hole: 1036; Output distribution 701;
Metal bar link: 7011; First lead: 1041; Second lead 1042;
Anode ear: 1021; Negative electrode lug 1022.
Embodiment
To combine accompanying drawing and specific embodiment to specify the utility model below, be used for explaining the utility model in the illustrative examples and the explanation of this utility model, but not as the qualification to the utility model.
Embodiment 1:
Shown in Fig. 2-7.A kind of lithium ion battery group that present embodiment provides mainly comprises following: housing 101, battery pack body 102, first metal bar 1031, second metal bar 1032, metal bar link 7011 and second lead.Wherein the annexation of each several part is following:
The end that first metal bar 1031, second metal bar 1032 is positioned at housing 101 is designated as the second end.End at each the second end is respectively equipped with along the vertical recessed scolding tin recess 1035 of this metal bar, on the hole wall of each scolding tin recess 1035, is respectively arranged with an entrance hole 1036.
One end of metal bar link 7011 combines with anode ear 1021 hot melts of battery pack body 102; The metal core of the other end runs through the entrance hole 1036 of first metal bar 1031; And be connected with first metal bar 1031 securely through soldering, scolding tin is full shape filling and is set in the scolding tin recess 1035 of first metal bar 1031;
In like manner; One end of second lead combines with the negative electrode lug hot melt of battery pack body 102; The metal core of the other end runs through the entrance hole 1036 of second metal bar 1032; And be connected with second metal bar 1032 securely through soldering, scolding tin is full shape filling and is set in the scolding tin recess 1035 of second metal bar 1032.
When soldering, at first make the metal core of lead pass entrance hole 1036 and go deep in the scolding tin recess 1035, fully soldering in scolding tin recess 1035 then fills in scolding tin recess 1035 up to scolding tin with fully dissolving no rosin joint.
But the lead that metal bar link 7011 in the present embodiment, second lead are super-high-current.
Wherein big ampere wires is made up of lead and terminals two parts, and brazing connects, and wire stylet is used the stranded copper wire coiling, and per share diameter is 0.1mm; Epidermis is the insulation protective jacket of polyamide fibre braiding, and wherein general 10-50A is set to the individual layer epidermis, and 100-3000A is set to double-layer surface.
Big ampere wires has good looking appearance, safe and reliable, the following tabulation one of the suitable current range of characteristics such as quality is soft, Wear-resistant, high-temperature resistant:
Table one: the electric current and the adaptive table of specification of big ampere wires
In reality, can select the big ampere wires of respective model for use according to the rated current of current lithium ion battery.
Therefore present embodiment has following beneficial effect:
Removed keyset of the prior art in the present embodiment; And adopted big ampere wires to connect lug and the metal bar that is applied to mutually export, and be provided with scolding tin recess 1035 at the end that metal bar is positioned at housing 101, the hole wall in this scolding tin room is provided with entrance hole 1036; Making the metal core of the big ampere wires that is connected with anode ear 1021, negative electrode lug respectively can run through entrance hole 1036 stretches in the scolding tin recess 1035; In scolding tin recess 1035, is connected with second metal bar 1032 through abundant soldering fixation ground, wherein scolding tin is and fills the shape filling and be set in the scolding tin recess 1035 of second metal bar 1032, makes big ampere wires directly stretch into the inside of lead-out terminal (first metal bar 1031, second metal bar 1032) and links together; Make that connection each other is more firm; Connect more fully, with respect to both outside directly connected modes of welding, employing this programme helps further reducing the whole internal resistance of battery pack; Improve discharging efficiency, improve heat dispersion.
Substitute mode with respect to the available technology adopting keyset; Adopt the present embodiment scheme; Circuit between the output leads component of the positive and negative lug that makes on the one hand battery pack body 102 to the housing 101 (first metal bar 1031, second metal bar 1032) connects and is easier to operation; And connect more firmly, be not easy to come off, loosening, and then help improving fail safe, the stability in production, the application process.
Further; In the delivery outlet portion of the lead-out terminal on housing 101 (first metal bar 1031, second metal bar 1032) screw thread 1034 is set; Like this when using; Can adopt suitable with it metal bar link 7011 to be provided with the adaptive externally threaded output distribution 701 of internal thread 1034 with the position of portalling, delivery outlet portions that its metal bar link 7011 is fully screwed in corresponding lead-out terminal get final product.With respect to connected modes such as level and smooth insertions, can export in the present embodiment and be connected closelyr between distribution 701 and the lead-out terminal, help reducing the output internal resistance, improve discharging efficiency, improve heat dispersion; And adopt this mode that spins also to make the power supply line between lead-out terminal and the power consumption equipment more firm, be not easy to come off, make its application safer, stable.
Need to prove that metal bar link 7011, second lead and can adopt hot melt to connect of positive and negative lug also can adopt soldering to connect.When hot melt, can but be not limited to adopt ultrasonic equipments such as fuse machine, energy storage machine that the parts that the need hot melt combines are processed, make the metal heated fusing of two parts of processed parts and fuse together and link together in the fusion of cooling after coagulation.
In the present embodiment; Attended operation for the convenience of the users and the fail safe that improves structure; Can also increase the film that posts look in an enterprising step of shell, (inside is added with the plastic sheet of toner; Can select common on the market various color films for use), make two films be attached to first metal bar 1031, the aperture periphery of second metal bar 1032 on shell respectively.This coloured film the fail safe that on the one hand can improve interface end is set, can be convenient to the user through the sign of color on the other hand and differentiate both positive and negative polarity, also help the outward appearance of improving the lithium ion battery group in addition, make it more attractive in appearance.
Further; Be positioned near the identification pattern that depression can also be set respectively the aperture of first metal bar 1031, second metal bar 1032 at the outer surface of this housing 101: "+", "-"; Further to be convenient to the output both positive and negative polarity of this lithium ion battery of user discrimination group, to further facilitate the user and use.
In the present embodiment, first metal bar 1031 and second metal bar 1032 can be the metal bar of whole piece through hole.But the inventor finds in carrying out the utility model research process, below adopting the internal resistance that can further reduce lithium ion battery is set preferably:
The utility model adopts the metal bar of solid shape as first metal bar 1031 and second metal bar 1032; When using; Draw out along the vertical recessed scolding tin recess 1035 of metal bar at an end of the metal bar of this solid shape; The other end is drawn out a wire hole portion with internal thread 1034 and is got final product, on promptly final first metal bar 1031, second metal bar 1032 except that be positioned at two terminal scolding tin recess 1035, other positions the wire hole portion are solid.Adopt this optimal way further to reduce the internal resistance of lithium ion battery, and improve the area of dissipation of this current output terminal, avoid temperature to cross high unfavorable condition.
Steadiness and aesthetic property for further strong product; First metal bar 1031 among the utility model embodiment, second metal bar 1032 can but be not limited to utilize the solid metal rod of cross section for rectangle, square, gear type, hexagon etc., dig out a scolding tin recess 1035 respectively at two ends of solid metal rod then, delivery outlet portion gets final product.
The test data contrast:
In order to further specify the effect of the utility model example structure, under identical test condition, the inventor tests following project respectively:
Contrast project 1: the lithium ion battery through keyset transfer output shown in Figure 1 in the prior art, its battery size is: 5400mAh-7.4V;
Contrast project 2: another kind of lithium ion battery, the distinctive points of itself and present embodiment 1 only is:
1036 inner wall smooths of entrance hole of first metal bar 1031, second metal bar 1032, no screw thread, the output distribution inserts 1036 external power devices of this entrance hole during application, and its battery size is: 5400mAh-7.4V;
Lithium ion battery among present embodiment project: the embodiment 1; First metal bar 1031,1032 liang of ends of second metal bar 1036 ones of entrance holes being respectively equipped with scolding tin recess 1035 and containing internal thread 1034 wherein; During application; The metal bar link 7011 of output distribution 701 fully screws in 1036 ones of entrance holes, and its battery size is: 5400mAh-7.4V.
Lithium ion battery to above-mentioned projects carries out the heavy-current discharge test respectively, test environment: room temperature, and the continuous discharge electric current is: 50C, discharge is tested its discharge temp as the discharge temp in the table two by the back;
Through test, obtain discharging efficiency curve shown in Figure 9, the data compare of analysis form shown in the table two.In Fig. 9,
901 curves are: the discharge curve of contrast project 1 lithium ion battery;
902 curves are: the discharge curve of contrast project 2 lithium ion batteries;
903 curves are: the discharge curve of present embodiment project lithium ion battery.
Table two: the main electrical parameter data deck watch in the discharge process
Can find out from above-mentioned experimental result comparison:
With 1 comparison of contrast project, the lithium ion battery of present embodiment project, its internal resistance has reduced by 46.46%, and discharging efficiency has improved 5.19%, and threshold voltage has improved 0.287V in the discharge, and discharge temp has reduced by 27 ℃.
With 2 comparisons of contrast project, the lithium ion battery of present embodiment project, its internal resistance has reduced by 17.19%, and discharging efficiency has improved 0.26%, and threshold voltage has improved 0.091V in the discharge, and discharge temp has reduced by 3 ℃.
To sum up, with respect to prior art, utilize the present embodiment technical scheme can improve the electrical property of lithium ion battery greatly.
Need to prove; Principle by present embodiment is set out; When actual design; During like not of uniform size the causing of internal resistance of the positive and negative electrode of current lithium ion battery body, 1036 ones of the entrance holes of the metal bar of polarity terminals side that can internal resistance is less (first metal bar 1031 or second metal bar 1032) are set to internal thread 1034 structures, and 1036 inwalls of entrance hole of another metal bar of the polarity terminals side that internal resistance is less are arranged to level and smooth shape.Correspondingly the metal bar connecting portion of an output distribution is set to the external screw thread shape, and the metal bar connecting portion of another output distribution is set to level and smooth shape.Through above-mentioned be provided with can balanced lithium ion battery internal resistance, guarantee that the internal resistance of two gate terminal of overall lithium ion battery is consistent, help making things convenient for the design of lithium ion battery group body 102.
The metal bar connecting portion of above-mentioned first metal bar 1031, second metal bar 1032 and/or output distribution 701 can but be not limited to albronze or the copper etc. on high temperature resistant, resistive ground, preferably copper.
More than technical scheme that the utility model embodiment is provided carried out detailed introduction; Used concrete example among this paper principle and the execution mode of the utility model embodiment are set forth, the explanation of above embodiment only is applicable to the principle that helps to understand the utility model embodiment; Simultaneously, for one of ordinary skill in the art, according to the utility model embodiment, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as the restriction to the utility model.
Claims (7)
1. a lithium ion battery is characterized in that, comprising: housing, battery pack body, first metal bar, second metal bar, first lead and second lead, wherein,
Said battery pack body, anode ear, negative electrode lug are installed in the said housing,
The end of said battery pack body is provided with anode ear, negative electrode lug;
Said first metal bar, second metal bar run through a shell wall of said housing respectively,
The end that said first metal bar, second metal bar are positioned at housing is respectively equipped with: one along the vertical recessed scolding tin recess of this metal bar, on the hole wall of each said scolding tin recess, is respectively arranged with: an entrance hole;
One end of said first lead is connected with said anode ear, and the metal core of the said first lead other end runs through the entrance hole of said first metal bar, and is fixedly connected with scolding tin in the scolding tin recess that is set in said first metal bar fullly;
One end of said second lead is connected with said negative electrode lug, and the metal core of the said second lead other end runs through the entrance hole of said second metal bar, and is fixedly connected with scolding tin in the scolding tin recess that is set in said second metal bar fullly;
Said first metal bar, second metal bar are positioned at the outer end of said housing and also are respectively arranged with: along the vertical recessed delivery outlet portion of this metal bar, be provided with screw thread at the inwall of arbitrary at least said delivery outlet portion.
2. lithium ion battery according to claim 1 is characterized in that,
Inwall in each said delivery outlet portion is provided with: screw thread.
3. lithium ion battery according to claim 2 is characterized in that, also comprises:
Anodal output distribution, negative pole output distribution are made up of the lead that metal bar link and periphery are enclosed with insulating barrier respectively,
The metal bar link of said anodal output distribution, negative pole output distribution can screw in the delivery outlet portion of said first metal bar, second metal bar respectively.
4. according to claim 1 or 2 or 3 described lithium ion batteries, it is characterized in that,
On said first metal bar, second metal bar, other positions except that said delivery outlet portion, scolding tin recess are solid.
5. according to claim 1 or 2 or 3 described lithium ion batteries, it is characterized in that,
The metal core of said first lead, second lead is: copper cash or copper stranded conductor,
The protective sleeve that is positioned at each said metal core periphery is: polyamide fibre braiding insulating barrier.
6. according to claim 1 or 2 or 3 described lithium ion battery groups, it is characterized in that,
The periphery cross section of said first metal bar and/or second metal bar is: gear-like or rectangle or hexagon.
7. according to claim 1 or 2 or 3 described lithium ion battery groups, it is characterized in that,
Outer surface at said housing posts: two coloured films,
Two said coloured films are surrounded on position, the hole periphery of said first metal bar, second metal bar respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012201029287U CN202487688U (en) | 2012-03-19 | 2012-03-19 | Lithium ion battery |
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| CN2012201029287U CN202487688U (en) | 2012-03-19 | 2012-03-19 | Lithium ion battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102593408A (en) * | 2012-03-19 | 2012-07-18 | 深圳市格瑞普电池有限公司 | Lithium ion battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102593408A (en) * | 2012-03-19 | 2012-07-18 | 深圳市格瑞普电池有限公司 | Lithium ion battery |
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