CN103456912B - Chain type Li-ion batteries piles - Google Patents
Chain type Li-ion batteries piles Download PDFInfo
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- CN103456912B CN103456912B CN201310418782.6A CN201310418782A CN103456912B CN 103456912 B CN103456912 B CN 103456912B CN 201310418782 A CN201310418782 A CN 201310418782A CN 103456912 B CN103456912 B CN 103456912B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Connection Of Batteries Or Terminals (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The present invention relates to field of lithium, disclose a kind of chain type Li-ion batteries piles.It comprises at least two fastening lithium ionic cells, is connected to metal bracelet between the positive and negative electrode terminal of each described fastening lithium ionic cell, and each described metal bracelet is by each described fastening lithium ionic cell series connection or be connected in parallel.Apply this technical scheme be more convenient to the installation of Li-ion batteries piles and carry.
Description
Technical field
The present invention relates to field of lithium ion battery, particularly a kind of chain type Li-ion batteries piles.
Background technology
Button battery (ButtonCell) is also known as fastening lithium ionic cell, and it refers to that overall dimension is as a little button non-rectangle lithium ion battery of a size.Current fastening lithium ionic cell is generally circle, and thinner thickness.
The making of the fastening lithium ionic cell of prior art mainly, cylindric winding battery core is obtained by winding process, then this cylindric winding battery core is pressed into square flat, be assembled in circular housing, obtain the button cell of profile circle or similar circle, winding battery core body is being assemblied in after in housing, to the negative pole lug welding of the width end of this square flat coiling body be connected to on the cathode bottom cover of housing, the shell of cathode bottom cover and housing is welded to connect, housing is as the negative pole of battery, the anode ear of the width end being connected to this square flat coiling body is welded on the positive pole by insulating trip and housing interval and covers, cathode output end sub-connection on this positive pole upper cover and housing.
In research process of the present invention, the present inventor finds that prior art at least exists following defect:
1, the capacity of fastening lithium ionic cell of the prior art is lower, and discharge performance is poor, limits the application of fastening lithium ionic cell, also more and more cannot meet the demand of people to high power capacity and high-multiplying-power battery.
Summary of the invention
The first object of the present invention is to provide a kind of chain type Li-ion batteries piles, applies this technical scheme and is more convenient to the installation of Li-ion batteries piles and carries.
A kind of chain type Li-ion batteries piles that the present embodiment provides, comprises at least two fastening lithium ionic cells,
Metal bracelet is connected between the positive and negative electrode terminal of each described fastening lithium ionic cell,
Each described metal bracelet is by each described fastening lithium ionic cell series connection or be connected in parallel, tie point between each lithium ion battery and described metal bracelet is facing each other, and each described fastening lithium ionic cell is connected to form a chain form battery pack by described metal bracelet in turn.
Alternatively, each described metal bracelet is from Fuse Type fuse, and when the temperature of described metal bracelet reaches predetermined temperature, described metal bracelet fuses automatically.
Alternatively, also comprise electric quantity display device, described electric quantity display device is connected with the circuit protection plate of each described fastening lithium ionic cell, for showing the electricity of current described chain type lithium ion battery.
Alternatively, described fastening lithium ionic cell comprises: laminated battery core body, and housing, and described laminated battery core body is encapsulated in described housing,
Described laminated battery core body comprises at least two positive plates, negative plate and barrier film, and described barrier film interval is described in any two between positive plate and negative plate;
Two longitudinal edges of each described positive plate and negative plate are respectively the curved edge of relative outer lug, two widthwise edges of each described positive plate and negative plate are respectively horizontal edge, the end of a horizontal edge has also extended longitudinally a pole piece extension wherein
On described laminated battery core body, the horizontal edge of two width end of each described positive plate, negative plate is respectively just to stacked, and the described pole piece extension of each described positive plate, negative plate is located opposite from two width end of described laminated battery core body respectively.
Alternatively, be positioned at the described top in laminated cell body thickness direction and the pole piece of bottom is: the described negative plate of one side coating,
The collector bare metal of the described negative plate of each described one side coating is showed in described laminated cell volume surrounding, and is welded to connect face-to-face with the negative pole cover of described housing;
The pole piece extension of each described negative plate is welded to each other connection, and is not welded to connect with described negative pole cover.
Alternatively, be welded on the positive terminal of described housing after the pole piece extension of each described positive plate is welded to each other connection, between described positive terminal and described laminated battery core body, be separated with insulating barrier.
Alternatively, described barrier film interval described in any two between positive plate and negative plate, specifically,
Each described positive plate is contained in each diaphragm bag respectively, and two longitudinal edges of each described diaphragm bag are respectively the curved edge of relative outer lug,
Two widthwise edges of each described diaphragm bag are respectively horizontal edge,
The described pole piece extension of each described positive plate stretches out from a widthwise edges of each described diaphragm bag respectively,
The described diaphragm bag that described positive plate is housed described in each is stacked with each described negative plate respectively.
Alternatively, be coated with polyvinylidene fluoride layer respectively at the end face of each described barrier film and bottom surface, be positioned at each described positive plate of each described barrier film end face and bottom surface, negative plate respectively with each described polyvinylidene fluoride layer bonding connection.
Alternatively, described housing is circular, oval.
Therefore, application technical solution of the present invention, relative to the Li-ion batteries piles of prior art, adopt the technical scheme of the present embodiment can obtain shape Li-ion batteries piles more flexibly, more adapt to the electricity consumption needs of people, for example this battery pack can be set to can the ring-type of buckle, and user can be worn on hand as bangle, is convenient to carry the charging at any time in advance to portable electric appts at any time.
As the signal of the present embodiment; can select from the metal bracelet of Fuse Type fuse as the present embodiment; when the temperature of metal bracelet reaches predetermined temperature; metal bracelet fuses automatically; thus the button cell disconnecting this Li-ion batteries piles connects; the excess temperature realizing battery pack is protected automatically, is conducive to improving electrical safety.
As the signal of the present embodiment; electric quantity display device can also be set on this chain type Li-ion batteries piles; this electric quantity display device is connected, for showing the electricity of current chain type lithium ion battery on this electric quantity display device further with the controller of the circuit protection plate of each fastening lithium ionic cell.Further facilitate people and understand current electric quantity at any time, conveniently charge in time.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms a application's part, does not form inappropriate limitation of the present invention, in the accompanying drawings:
The structural representation of the chain type Li-ion batteries piles that Fig. 1 provides for the embodiment of the present invention 1.
Fig. 2 provides the positive plate structural representation that can be applicable in chain type Li-ion batteries piles for embodiment of the present invention 2-5;
Fig. 3 provides the negative plate structure schematic diagram that can be applicable in chain type Li-ion batteries piles for embodiment of the present invention 2-5;
Fig. 4 provides the structural representation that the diaphragm bag of positive plate is housed that can be applicable in chain type Li-ion batteries piles for the embodiment of the present invention 3;
Fig. 5 provides the structural representation of the fastening lithium ionic cell that can be applicable in chain type Li-ion batteries piles for embodiment of the present invention 2-5.
reference numeral:
100: fastening lithium ionic cell; 101: positive plate; 102: negative plate;
103: diaphragm bag; 1011: curved edge; 1012: curved edge;
1013: horizontal edge; 1014: horizontal edge; 1015: pole piece extension;
1016: pole piece extension; 1031: widthwise edges; 1032: widthwise edges;
1033: horizontal edge; 1034: horizontal edge; 601: metal bracelet.
Embodiment
Describe the present invention in detail below in conjunction with accompanying drawing and specific embodiment, be used for explaining the present invention in this illustrative examples of the present invention and explanation, but not as a limitation of the invention.
Embodiment 1:
Shown in Figure 1, present embodiments provide a kind of chain type Li-ion batteries piles adopting fastening lithium ionic cell group composition.
Specifically difference connection metal chain 601 between the positive terminal, negative terminal of each fastening lithium ionic cell 100, each fastening lithium ionic cell 100 to be linked together composition arc, annular or the arbitrary shape such as circular by metal bracelet 601, thus each fastening lithium ionic cell 100 is carried out connect or parallel connection or connection in series-parallel are connected and obtain the chain type Li-ion batteries piles of the present embodiment.
Wherein, the metal bracelet 601 of the present embodiment can be rigid metal chain 601, also can be soft alloy chain 601.This metal bracelet 601 can be naked metal, also can be enclosed with insulating barrier in the periphery of this metal bracelet 601.
Therefore, relative to the Li-ion batteries piles of prior art, adopt the technical scheme of the present embodiment can obtain shape Li-ion batteries piles more flexibly, more adapt to the electricity consumption needs of people, for example this battery pack can be set to can the ring-type of buckle, user can be worn on hand as bangle, is convenient to carry the charging at any time in advance to portable electric appts at any time.
As the signal of the present embodiment; can select certainly from the metal bracelet 601 of Fuse Type fuse as the present embodiment; when the temperature of metal bracelet 601 reaches predetermined temperature; metal bracelet 601 fuses automatically; thus the button cell disconnecting this Li-ion batteries piles connects; the excess temperature realizing battery pack is protected automatically, is conducive to improving electrical safety.
As the signal of the present embodiment; electric quantity display device can also be set on this chain type Li-ion batteries piles; this electric quantity display device is connected, for showing the electricity of current chain type lithium ion battery on this electric quantity display device further with the controller of the circuit protection plate of each fastening lithium ionic cell 100.Further facilitate people and understand current electric quantity at any time, conveniently charge in time.
Embodiment 2:
Shown in Fig. 2-5.
Present embodiments provide the fastening lithium ionic cell 100 in a kind of chain type Li-ion batteries piles that can be applied in embodiment 1, this battery mainly comprises: housing and the laminated battery core body be encapsulated in housing.
The laminated battery core body of the present embodiment fastening lithium ionic cell 100 becomes primarily of at least two positive plates 101, negative plate 102 and membrane layer stacked group.Wherein between every layer of positive plate 101, negative plate 102 respectively between be separated with one deck barrier film.Positive plate 101, the negative plate 102 of the present embodiment are apple shape but not the rectangle of prior art respectively.
Specifically, two longitudinal edges of each positive plate 101, negative plate 102 are respectively the curved edge 1011,1012 of relative outer lug, the convex arc just looking like the both sides outwardly convex of apple is the same, two widthwise edges of each described positive plate 101 and negative plate 102 are respectively horizontal edge 1013,1014, and the end of a horizontal edge 1013 has also extended longitudinally a pole piece extension wherein, this pole piece extension has just looked like that the carpopodium of apple is the same.
When carrying out laminated battery core body and being stacked, make the horizontal edge 1012,1013 of two width end of stacked positive plate 101, negative plate 102 relatively up and down just to stacked, and each pole piece extension 1015 of each positive plate 101 is stretched out from a width end of laminated battery core body, each pole piece extension 1016 of negative plate 102 stretches out from another width end of laminated battery core body, make on laminated battery core body, the pole piece extension 1015,1016 of positive plate 101, negative plate 102 stretches out respectively relatively from the front end of laminated battery core body and rear end respectively.
After obtaining laminated battery core body, this laminated battery core body is encapsulated in the housing of button cell.
Therefore, application the present embodiment structure, relative to prior art, particularly relative to the fastening lithium ionic cell 100 adopting the winding battery core system of flat to become, because the present embodiment adopts pole piece to be the laminated battery core body that the pole piece laminating of apple shape is made, and the left and right edges of the laminated battery core body of the present embodiment is respectively in arc outwardly, it is after being assemblied in housing, the present embodiment laminated cell physical efficiency makes full use of the useful space in housing, improve positive plate 101 as far as possible, the pole-piece area of negative plate 102, be conducive to the capacity improving lithium ion battery on the basis of the button cell of finite size,
In addition, positive plate 101 in the present embodiment laminated battery core body, two width end of negative plate 102 are respectively horizontal edge, and positive plate 101, the pole piece extension of negative plate 102 stretches out from two width end of laminated battery core body respectively, therefore the curved edge 1011 increasing the longitudinal width of pole piece two can be conducive to when pole piece designs, 1012, shorten the length of the horizontal edge of its width end to improve the area of pole piece to greatest extent, can also guarantee when lamination, by the horizontal edge of each pole piece width end up and down just to stacked and be conducive to the location of lamination, improve technique accuracy and the controllability of lamination, improve the process efficiency of lamination process, improve batch consistency of laminated battery core body, reduce fraction defective.
Embodiment 3:
The difference of the present embodiment and embodiment 3 is mainly:
As the signal of the present embodiment, only one side can also be adopted in the present embodiment to be coated with the negative plate 102 of negative material as the end face of lamination at laminated battery core body and the pole piece of bottom surface, and the collector bare metal face of the negative plate 102 that this one side is applied is positioned at the end face of laminated battery core body and the outermost layer of bottom surface.Laminated battery core body is contained in after in housing, be welded near the collector bare metal of housing as the negative plate 102 of the end face of negative pole cover Face to face on the end face of housing, at this moment only need each pole piece extension of negative plate 102 to be welded to each other and connect and without the need to the pole piece extension of each negative plate 102 to be welded the electric connection that can realize each negative plate 102 and housing with the end face of housing, shell is as the negative output terminals of fastening lithium ionic cell 100.
In the present embodiment, adopt above-mentioned schematic construction, due to the outermost layer being positioned at laminated battery core body is set to negative plate 102, and make the uncoated electrode material of exposed face of this outermost negative plate 102, be the collector bare metal face of negative plate 102, when carrying out negative pole and connecting, only need the pole piece extension of each negative plate 102 to be welded to each other (the pole piece extension of each negative plate 102 without the need to by anode connector or be not welded on housing by anode connector), then the technique that the collector bare metal face of negative plate 102 is welded with housing end face can realize the connection of negative pole and housing.
First be welded to each negative plate 102 on the anode connector be connected with housing relative to the lug of negative plate in prior art 102 and realize the technical scheme with the connection of housing by this anode connector, adopt the present embodiment technical scheme can realize negative pole on the basis not using anode connector be connected with the direct of housing thus the annex in the housing of limited space can be reduced, be conducive to this effectively to be utilized for laminated battery core body in space of saving, be conducive to the battery capacity improving the limited fastening lithium ionic cell 100 of dimensions; And reduce on the basis of negative material coated area of negative plate 102, improve the capacity of battery on the contrary further, and application the present embodiment technical scheme, negative plate 102 is larger with the connection contact area of housing, connect more firm, be conducive to the internal resistance reducing this fastening lithium ionic cell 100, improve discharging efficiency.
In the present embodiment, can select the positive plate 101 of dual coating, and the negative plate 102 of dual coating can be adopted as the negative plate 102 being layered in laminated battery core body inside, concrete needs are according to actual battery capacity and design needs.
As the signal of this enforcement, the positive plate 101 of the present embodiment laminated battery core body can adopt following technical scheme with the connection of the positive terminal of housing:
The pole piece extension of each positive plate 101 is welded to each other connection, then the pole piece extension this be welded to each other together is welded on the positive terminal of housing, be separated with insulating barrier between wherein between this positive terminal and housing, thus the positive terminal on positive pole and housing is electrically connected.
Embodiment 4:
The difference of the present embodiment and embodiment 3 is mainly: adopt positive plate 101 barrier film pack technique in the present embodiment, specific as follows:
Shown in Figure 3, before carrying out lamination, first each positive plate 101 is respectively charged in each diaphragm bag 103, wherein, the structure of the diaphragm bag 103 of the present embodiment is as follows: two longitudinal edges of each diaphragm bag 103 are respectively the curved edge 1031,1032 of the relative outer lug matched with two longitudinal edges of positive plate 101, and two widthwise edges are respectively horizontal edge 1033,1034.Make after loading positive plate 101 toward every diaphragm bag 103, the pole piece extension of each positive plate 101 width end is stretched 1015 and is gone out outside the widthwise edges 1034 of diaphragm bag 103.After each positive plate 101 is loaded diaphragm bag 103, the diaphragm bag 103 that positive plate 101 is respectively housed is made to carry out the stacked laminated battery core body that can obtain the present embodiment with each negative plate 102 respectively.
The barrier film bagger artistic skill of the present embodiment is adopted to improve the process efficiency of lamination enough further.
Embodiment 5:
The difference of the present embodiment and embodiment 4 is mainly:
End face and the bottom surface of each barrier film of the present embodiment are coated with polyvinylidene fluoride layer (PolyvinylideneFluoride respectively, be called for short PVDF), be positioned at each positive plate 101 of each barrier film end face and bottom surface, negative plate 102 respectively with each PVDF layer bonding connection of each barrier film.
Like this in the process of Battery formation, the PVDF layer on barrier film two sides is in semi-molten state and is bonded together with the positive plate 101 on its both sides and negative plate 102, is conducive to the structural stability improving laminated battery core body further.
It should be noted that, the fastening lithium ionic cell 100 of each embodiment can be circular or oval or other the similar circles of flat fastening lithium ionic cell 100.
Analysis of experimental data:
In order to further illustrate the technique effect of the present embodiment, being below prepared diameter is: 30 millimeters, and thickness is 32 millimeters: fastening lithium ionic cell 100, and experimental data compare of analysis is carried out to these fastening lithium ionic cells 100:
Comparative example 1: button cell adopts flat winding battery core body, angle and the housing of winding battery core body are inconsistent;
Comparative example 2: button cell adopts square laminated battery core body, angle and the housing of laminated battery core body are inconsistent;
Embodiment 1: button cell adopts the laminated battery core body of the embodiment of the present invention 2;
Embodiment 2: button cell adopts the laminated battery core body of the embodiment of the present invention 3;
Embodiment 3: button cell adopts the laminated battery core body of the embodiment of the present invention 5;
To sample respectively the sampling ten of above-mentioned each button cell, sampling tested, obtains with the experimental data shown in following table one:
Table one: experimental data compare of analysis table
| Project | Comparative example 1 | Comparative example 2 | Embodiment 1 | Embodiment 2 | Embodiment 4 |
| Capacity | 160 | 180 | 220 | 230 | 240 |
| Discharge-rate | 1C | 3C | 5C | 5C | 5C |
Therefore, adopt the present embodiment technical scheme, significant effect can be obtained relative to prior art on the discharge-rate improving battery capacity and raising battery.Accordingly, the fastening lithium ionic cell of the present embodiment is applied in the chain type Li-ion batteries piles of embodiment 1 and in like manner can obtains above-mentioned technique effect.
Above the technical scheme that the embodiment of the present invention provides is described in detail, apply specific case herein to set forth the principle of the embodiment of the present invention and execution mode, the explanation of above embodiment is only applicable to the principle helping to understand the embodiment of the present invention; Meanwhile, for one of ordinary skill in the art, according to the embodiment of the present invention, embodiment and range of application all will change, and in sum, this description should not be construed as limitation of the present invention.
Claims (7)
1. a chain type Li-ion batteries piles, is characterized in that, comprises at least two fastening lithium ionic cells,
Metal bracelet is connected between the positive and negative electrode terminal of each described fastening lithium ionic cell,
Each described metal bracelet is by each described fastening lithium ionic cell series connection or be connected in parallel, tie point between each lithium ion battery and described metal bracelet is facing each other, and each described fastening lithium ionic cell is connected to form a chain form battery pack by described metal bracelet in turn;
Described fastening lithium ionic cell comprises: laminated battery core body, and housing, and described laminated battery core body is encapsulated in described housing,
Described laminated battery core body comprises at least two positive plates, negative plate and barrier film, and described barrier film interval is described in any two between positive plate and negative plate;
Two longitudinal edges of each described positive plate and negative plate are respectively the curved edge of relative outer lug, two widthwise edges of each described positive plate and negative plate are respectively horizontal edge, the end of a horizontal edge has also extended longitudinally a pole piece extension wherein
On described laminated battery core body, the horizontal edge of two width end of each described positive plate, negative plate is respectively just to stacked, and the described pole piece extension of each described positive plate, negative plate is located opposite from two width end of described laminated battery core body respectively;
Described barrier film interval described in any two between positive plate and negative plate, specifically,
Each described positive plate is contained in each diaphragm bag respectively, and two longitudinal edges of each described diaphragm bag are respectively the curved edge of relative outer lug,
Two widthwise edges of each described diaphragm bag are respectively horizontal edge,
The described pole piece extension of each described positive plate stretches out from a widthwise edges of each described diaphragm bag respectively,
The described diaphragm bag that described positive plate is housed described in each is stacked with each described negative plate respectively.
2. a kind of chain type Li-ion batteries piles according to claim 1, is characterized in that,
Each described metal bracelet is from Fuse Type fuse, and when the temperature of described metal bracelet reaches predetermined temperature, described metal bracelet fuses automatically.
3. a kind of chain type Li-ion batteries piles according to claim 1 and 2, is characterized in that,
Also comprise electric quantity display device, described electric quantity display device is connected with the circuit protection plate of each described fastening lithium ionic cell, for showing the electricity of current described chain type lithium ion battery.
4. a kind of chain type Li-ion batteries piles according to claim 1, is characterized in that,
Be positioned at the described top in laminated cell body thickness direction and the pole piece of bottom is: the described negative plate of one side coating,
The collector bare metal of the described negative plate of each described one side coating is showed in described laminated cell volume surrounding, and is welded to connect face-to-face with the negative pole cover of described housing;
The pole piece extension of each described negative plate is welded to each other connection, and is not welded to connect with described negative pole cover.
5. a kind of chain type Li-ion batteries piles according to claim 1, is characterized in that,
Be welded on the positive terminal of described housing after the pole piece extension of each described positive plate is welded to each other connection, between described positive terminal and described laminated battery core body, be separated with insulating barrier.
6. a kind of chain type Li-ion batteries piles according to claim 1, is characterized in that,
Be coated with polyvinylidene fluoride layer respectively at the end face of each described barrier film and bottom surface, be positioned at each described positive plate of each described barrier film end face and bottom surface, negative plate respectively with each described polyvinylidene fluoride layer bonding connection.
7. a kind of chain type Li-ion batteries piles according to claim 1, is characterized in that,
Described housing is circular, oval.
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| CN201310418782.6A CN103456912B (en) | 2013-09-13 | 2013-09-13 | Chain type Li-ion batteries piles |
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| CN201310418782.6A CN103456912B (en) | 2013-09-13 | 2013-09-13 | Chain type Li-ion batteries piles |
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| CN103441237B (en) * | 2013-09-13 | 2015-11-11 | 深圳市格瑞普电池有限公司 | The chain type Li-ion batteries piles of buckle type lithium ion battery |
| CN107492678A (en) * | 2016-06-13 | 2017-12-19 | 兴能高科技股份有限公司 | The class stack wrap formula structure of lithium ion battery |
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