CN104362281A - Single cell of high-voltage lithium ion battery and preparation method of single cell - Google Patents
Single cell of high-voltage lithium ion battery and preparation method of single cell Download PDFInfo
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- CN104362281A CN104362281A CN201410539642.9A CN201410539642A CN104362281A CN 104362281 A CN104362281 A CN 104362281A CN 201410539642 A CN201410539642 A CN 201410539642A CN 104362281 A CN104362281 A CN 104362281A
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- pole piece
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention discloses a single cell of a high-voltage lithium ion battery and a preparation method of the single cell. The single cell comprises n first pole pieces, n second pole pieces, a first independent pole piece connected with a first tab and a second independent pole piece connected with a second tab, wherein the first pole pieces and the second pole pieces are electrically connected to form pole piece pairs; the pole piece pairs, the first independent pole piece and the second independent pole piece are connected in a non-electrical connection mode to form pole piece groups; and the cell is formed by the pole piece groups with a conventional winding technology. One pair of positive and negative pole pieces is electrically connected to obtain one pole piece pair, the pole piece pairs and the independent pole pieces provided with the tabs are connected in an insulated manner to obtain the pole piece groups, the pole piece groups are prepared into the cell with the conventional winding technology and connected in series to be integrated into the cell, the voltage of the single cell formed after one-time winding reaches the high-voltage effect required by series connection of a plurality of existing single cells, further, the internal battery resistance is smaller than the internal battery resistance obtained with a traditional series connection mode, and the rate discharge capacity of a battery pack is improved.
Description
Technical field
The invention belongs to technical field of lithium ion, particularly relate to a kind of takeup type high pressure monomer battery core and preparation method thereof.
Background technology
Operating voltage is high owing to having for lithium ion battery, specific energy density is large, have extended cycle life, self-discharge rate is low, memory-less effect and the advantage such as environmental pollution is little, is widely used in fields such as communication apparatus, mobile electronic device, electric tools.In recent years, lithium ion battery is progressively applied at large-scale energy storage facility, electric motor car, aerospace field.Thus, the voltage and current of people to lithium ion battery is had higher requirement, but limit by electrochemical system, the battery core monomer ceiling voltage of lithium ion battery is less than 4.5V, and current people meet the demand of large voltage and big current in application by multiple monomer battery cores of lithium ion battery being carried out connection in series-parallel.
The patent No. be 200720199074.8 Chinese utility model patent disclose a kind of connecting structure for lithium ion battery set, between lithium ion battery be series connection: the positive pole ear bundle of first lithium ion battery by being connected to Positive Poles terminal after short-circuit fuse, the positive pole ear Shu Xianglian of negative lug bundle and adjacent second lithium ion battery; The negative lug bundle of second lithium ion battery and the adjacent the 3rd lithium ionic cell positive pole ear Shu Xianglian, analogize therewith; The negative lug bundle of last lithium ion battery receives negative pole terminal post.The patent No. be 201220247741.6 Chinese utility model patent disclose the accurate Double-pole lug battery of a kind of multi-winding-core, the core group comprising shell and install in the enclosure, described core group comprises first core and at least one second core, described first core and the second core are connected in parallel, first core is stacked winding formed by negative plate, barrier film, positive plate, the positive plate of the first core is welded with positive pole ear, the upper end of positive pole ear is provided with blob of viscose, the negative plate of the first core is welded with negative lug, and the upper end of negative lug is provided with blob of viscose; Second core is stacked winding formed by negative plate, barrier film, positive plate, and the positive plate of the second core is welded with positive strap, and the negative plate of the second core is welded with negative strap; All positive strap are connected with positive pole ear, and all negative strap are connected with negative lug.
As previously mentioned, in order to obtain high voltage, prior art is multiple battery core monomer that first reels, and then obtains required high voltage by multiple monomer battery core is carried out being connected into battery pack.When carrying out secondary to lug and connecting, can produce new internal resistance in lug junction, this will increase total internal resistance of battery pack, and the battery pack for large multiplying power discharging purposes then can have a negative impact, and complex operation, consuming time.
Summary of the invention
The object of this invention is to provide a kind of high pressure monomer battery core and preparation method thereof, monomer battery core will be incorporated in series inner, the monomer battery core voltage formed after once reeling can be made to reach the required high pressure effect realized of existing multiple monomer battery core series connection.
To achieve these goals, the present invention takes following technical solution:
The monomer battery core of high-voltage lithium ion battery, comprise: individual first pole piece of n, n the second pole piece, the first independent pole piece be connected with the first lug and the second independent pole piece be connected with the second lug, wherein, n > 1 and N is even number, first pole piece and second pole piece are electrically connected to form pole piece pair; Described second independent pole piece, a n/2 pole piece are connected to insulating successively, form the first pole piece group, and all the other n/2 pole piece insulate connected to, described first independent pole piece successively, forms the second pole piece group; Described first pole piece group, barrier film, the second pole piece group winding form battery core.
One as the monomer battery core of high-voltage lithium ion battery of the present invention is improved, described n >=1 and be odd number, (n+1)/2 pole pieces are connected to insulating successively, form the first pole piece group, described second independent pole piece, all the other (n-1)/2 pole pieces insulate connected to, the first independent pole piece successively, form the second pole piece group, described first pole piece group, barrier film, the second pole piece group winding form battery core.
One as the monomer battery core of high-voltage lithium ion battery of the present invention is improved, described pole piece to, between the first independent pole piece, the second independent pole piece by insulating cement insulation be connected.
The preparation method of the monomer battery core of high-voltage lithium ion battery, comprises the following steps:
Step 1, preparation n positive plate: positive 1, positive 2 ..., positive n, prepare n negative plate: bear 1, bear 2 ..., negative n, wherein, n is even number and n > 1;
Step 2, prepare the just independent pole piece be connected with anode ear and the negative independent pole piece be connected with negative electrode lug;
Step 3, a positive plate and negative plate being electrically connected forms pole piece pair, obtains n pole piece pair;
Step 4, successively n/2 pole piece is carried out non-electric-connecting to, just independent pole piece, form the first pole piece group;
Step 5, successively that negative independent pole piece, all the other n/2 pole piece is non-electric-connecting to carrying out, form the second pole piece group;
The second pole piece group that step 6, the first pole piece group step 4 obtained, step 5 obtain reels and obtains monomer battery core together with barrier film.
One as the monomer method for making electric core of high-voltage lithium ion battery of the present invention is improved, for spot welding connects between the positive plate that in described step 3, pole piece is right and negative plate.
One as the monomer method for making electric core of high-voltage lithium ion battery of the present invention is improved, non-electric-connecting for adopting insulating cement to carry out rubberizing connection in described step 4 and step 5.
The preparation method of the monomer battery core of high-voltage lithium ion battery, comprises the following steps:
Step 1, preparation n positive plate: positive 1, positive 2 ..., positive n, prepare n negative plate: bear 1, bear 2 ..., negative n, wherein, n is odd number and n >=1;
Step 2, prepare the just independent pole piece be connected with anode ear and the negative independent pole piece be connected with negative electrode lug;
Step 3, a positive plate and negative plate being electrically connected forms pole piece pair, obtains n pole piece pair;
Step 4, successively that (n+1)/2 pole piece is non-electric-connecting to carrying out, form the first pole piece group;
Step 5, independent pole piece will be born successively, all the other (n-1)/2 pole pieces carry out non-electric-connecting to, just independent pole piece, form the second pole piece group;
The second pole piece group that step 6, the first pole piece group step 4 obtained, step 5 obtain reels and obtains monomer battery core together with barrier film.
One as the monomer method for making electric core of high-voltage lithium ion battery of the present invention is improved, for spot welding connects between the positive plate that in described step 3, pole piece is right and negative plate.
One as the monomer method for making electric core of high-voltage lithium ion battery of the present invention is improved, non-electric-connecting for adopting insulating cement to carry out rubberizing connection in described step 4 and step 5.
From above technical scheme, a pair positive and negative plate is first carried out electrical connection composition pole piece pair by the present invention, then pole piece is non-electric-connecting to carrying out, or pole piece pair is carried out non-electric-connecting with the independent pole piece of band lug, obtain pole piece group, after pole piece group being adopted conventional roll winding technologe winding, high pressure monomer battery core can be obtained.With traditional battery core is carried out connect obtain high-voltage battery group mode compared with, the present invention will incorporate in series in battery core inner, the pole piece group obtained after being connected by pole piece reels, the monomer battery core voltage formed after single is reeled reaches the required high pressure effect realized of existing multiple monomer battery core series connection, settle at one go, not only simplify technique, and secondary welding during owing to not having traditional handicraft battery core to connect, new internal resistance can not be increased, it is less that internal resistance obtains the internal resistance of cell than traditional battery core series system, contributes to improving battery pack multiplying power discharging ability.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below by need in embodiment or description of the prior art use accompanying drawing do simple introduction, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of embodiment of the present invention pole piece;
Fig. 2 is the right structural representation of embodiment of the present invention pole piece;
Fig. 3 is the right partial enlargement structural representation of embodiment of the present invention pole piece.
Embodiment
Describe the present invention below in conjunction with accompanying drawing; when describing the embodiment of the present invention in detail, for ease of illustrating, represent that the accompanying drawing of device architecture can be disobeyed general ratio and be done partial enlargement; and described schematic diagram is example, it should not limit the scope of protection of the invention at this.It should be noted that, accompanying drawing all adopts the form that simplifies very much and all uses non-ratio accurately, only in order to object that is convenient, the clearly aid illustration embodiment of the present invention.
As shown in Figure 1, Figure 2 and Figure 3, monomer battery core of the present invention comprises the just independent pole piece 3 and a negative independent pole piece 5 be connected with negative electrode lug 6 that multiple positive plate 1 and corresponding multiple negative plates 2, are connected with anode ear 4.In the explanation of following examples, using positive plate as the first pole piece, negative plate is described as the second pole piece, the polarity of the first pole piece and the second pole piece is different, accordingly, anode ear is the first lug, and negative electrode lug is the second lug, just independent pole piece is the first independent pole piece, and negative independent pole piece is the second independent pole piece.Certainly, the polarity of first, second pole piece, first, second lug, first, second independent pole piece also can correspondingly be exchanged.
A pole piece is formed to A by electrical connection (b) between a positive plate 1 and a negative plate 2, some individual pole pieces to A insulate successively connected (a) form pole piece group, also comprise the independent pole piece be connected with lug in pole piece group, after pole piece group being adopted conventional roll winding technologe to reel together with barrier film, namely form monomer battery core of the present invention.
Below in conjunction with instantiation, the present invention is described in detail.
Embodiment 1
As prepared the monomer battery core of 3.7*n V, wherein n is even number and n > 1, and preparation method is as follows:
1, the techniques such as traditional oven dry pair roller are adopted to prepare n positive plate 1: positive 1, positive 2 ..., positive n, prepare n negative plate 2: bear 1, bear 2 ..., negative n;
2, prepare the just independent pole piece 3 be connected with anode ear 4 and the negative independent pole piece 5 that is connected with negative electrode lug 6, wherein, anode ear 4 spot welding is connected on just independent pole piece 3, and negative electrode lug 6 spot welding is connected on negative independent pole piece 5;
3, a positive plate 1 and the spot welding of a negative plate 2 are joined together to form pole piece to A, the positive plate of pole piece centering with between negative plate for electricity () is connected, i.e. positive 1-negative 1 electrical connection formation pole piece pair, positive 2-negative 2 electrical connection formation pole piece pair,, positive n-negative n is electrically connected formation pole piece pair, obtains n pole piece pair altogether;
4, successively n/2 pole piece is carried out non-electrical () connect A, just independent pole piece 3, form the first pole piece group, as adopt insulating cement by rubberizing mode will positive 1-negative 1 (pole piece to), positive 2-to bear 2 (pole piece to) ...,
(pole piece to), just independent pole piece insulate connected successively; During as n=6, positive 1-negative 1, positive 2-negative 2, positive 3-negative 3, just independent pole piece are connected to form the first pole piece group successively;
5, successively negative independent pole piece 5, a n/2 pole piece are carried out non-electrical () to A and connect, form the second pole piece group, namely negative independent pole piece,
, positive n-negative n insulate connected successively; During as n=6, negative independent pole piece, positive 4-negative 4, positive 5-negative 5, positive 6-negative 6 is connected to form the second pole piece group successively;
6, the second pole piece group that the first pole piece group step 4 obtained, step 5 obtain, together with barrier film, adopts conventional winding process, comprises both positive and negative polarity contraposition and pole piece bag tail etc., and winding obtains 3.7*n V monomer battery core.
Embodiment 2
For the monomer battery core of preparation 3.7*n V, wherein n is odd number and n >=1, and preparation method is as follows:
1, n positive plate is prepared: positive 1, positive 2 ..., positive n, prepare n negative plate: bear 1, bear 2 ..., negative n;
2, prepare the just independent pole piece be connected with anode ear and the negative independent pole piece be connected with negative electrode lug, anode ear spot welding is connected on just independent pole piece, and negative electrode lug spot welding is connected on negative independent pole piece;
3, a positive plate and a negative plate spot welding are joined together to form pole piece pair, the positive plate of pole piece centering with between negative plate for electricity () is connected, i.e. positive 1-negative 1 electrical connection formation pole piece pair, positive 2-negative 2 electrical connection formation pole piece pair,, positive n-negative n is electrically connected formation pole piece pair, forms n pole piece pair altogether;
4, successively (n+1)/2 pole piece is connected to form the first pole piece group to carrying out non-electrical (), namely positive 1-negative 1, positive 2-negative 2 ...,
insulation is connected successively; During as n=5, be connected to form the first pole piece group successively by positive 1-negative 1, positive 2-negative 2, positive 3-negative 3;
5, independent pole piece will be born successively, (n-1)/2 pole piece will carry out non-electrical () connect to form the second pole piece group to, just independent pole piece, namely negative independent pole piece,
, positive n-negative n insulate connected successively; During as n=5, independent pole piece will be born, positive 4-negative 4, positive 5-negative 5, just independent pole piece will be connected to form the second pole piece group successively;
6, the second pole piece group that the first pole piece group step 4 obtained, step 5 obtain, together with barrier film, adopts conventional winding process, comprises both positive and negative polarity contraposition and pole piece bag tail etc., and winding obtains 3.7*n V monomer battery core.
In specific implementation, the Capacity design of each positive plate also can be the same or different, same, and the Capacity design of each negative plate also can be the same or different, and the Capacity design of the explanation positive and negative plate of above embodiment is 3.7v.In addition, can design lug position adjustment centre-to-centre spacing and internal resistance in independent pole piece according to demand, between pole piece, connected mode also can be different.
Above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although with reference to above-described embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that, still can modify to the specific embodiment of the present invention or equivalent replacement, and not departing from any amendment of spirit and scope of the invention or equivalent replacement, it all should be encompassed among right of the present invention.
Claims (9)
1. the monomer battery core of high-voltage lithium ion battery, is characterized in that, comprising:
Individual first pole piece of n, n the second pole piece, the first independent pole piece be connected with the first lug and the second independent pole piece be connected with the second lug, wherein, n > 1 and N is even number, first pole piece and second pole piece are electrically connected to form pole piece pair;
Described second independent pole piece, a n/2 pole piece are connected to insulating successively, form the first pole piece group, and all the other n/2 pole piece insulate connected to, described first independent pole piece successively, forms the second pole piece group;
Described first pole piece group, barrier film, the second pole piece group winding form battery core.
2. the monomer battery core of high-voltage lithium ion battery as claimed in claim 1, it is characterized in that: described n >=1 and for odd number, (n+1)/2 pole pieces are connected to insulating successively, form the first pole piece group, described second independent pole piece, all the other (n-1)/2 pole pieces insulate connected to, the first independent pole piece successively, form the second pole piece group, described first pole piece group, barrier film, the second pole piece group winding form battery core.
3. the monomer battery core of high-voltage lithium ion battery as claimed in claim 1 or 2, is characterized in that: described pole piece to, be connected by insulating cement insulation between the first independent pole piece, the second independent pole piece.
4. the preparation method of the monomer battery core of high-voltage lithium ion battery, is characterized in that, comprise the following steps:
Step 1, preparation n positive plate: positive 1, positive 2 ..., positive n, prepare n negative plate: bear 1, bear 2 ..., negative n, wherein, n is even number and n > 1;
Step 2, prepare the just independent pole piece be connected with anode ear and the negative independent pole piece be connected with negative electrode lug;
Step 3, a positive plate and negative plate being electrically connected forms pole piece pair, obtains n pole piece pair;
Step 4, successively n/2 pole piece is carried out non-electric-connecting to, just independent pole piece, form the first pole piece group;
Step 5, successively that negative independent pole piece, all the other n/2 pole piece is non-electric-connecting to carrying out, form the second pole piece group;
The second pole piece group that step 6, the first pole piece group step 4 obtained, step 5 obtain reels and obtains monomer battery core together with barrier film.
5. the preparation method of the monomer battery core of high-voltage lithium ion battery as claimed in claim 4, is characterized in that: for spot welding connects between the positive plate that in described step 3, pole piece is right and negative plate.
6. the preparation method of the monomer battery core of high-voltage lithium ion battery as claimed in claim 4, is characterized in that: non-electric-connecting for adopting insulating cement to carry out rubberizing connection in described step 4 and step 5.
7. the preparation method of the monomer battery core of high-voltage lithium ion battery, is characterized in that, comprise the following steps:
Step 1, preparation n positive plate: positive 1, positive 2 ..., positive n, prepare n negative plate: bear 1, bear 2 ..., negative n, wherein, n is odd number and n >=1;
Step 2, prepare the just independent pole piece be connected with anode ear and the negative independent pole piece be connected with negative electrode lug;
Step 3, a positive plate and negative plate being electrically connected forms pole piece pair, obtains n pole piece pair;
Step 4, successively that (n+1)/2 pole piece is non-electric-connecting to carrying out, form the first pole piece group;
Step 5, independent pole piece will be born successively, all the other (n-1)/2 pole pieces carry out non-electric-connecting to, just independent pole piece, form the second pole piece group;
The second pole piece group that step 6, the first pole piece group step 4 obtained, step 5 obtain reels and obtains monomer battery core together with barrier film.
8. the preparation method of the monomer battery core of high-voltage lithium ion battery as claimed in claim 7, is characterized in that: for spot welding connects between the positive plate that in described step 3, pole piece is right and negative plate.
9. the preparation method of the monomer battery core of high-voltage lithium ion battery as claimed in claim 7, is characterized in that: non-electric-connecting for adopting insulating cement to carry out rubberizing connection in described step 4 and step 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410539642.9A CN104362281A (en) | 2014-10-13 | 2014-10-13 | Single cell of high-voltage lithium ion battery and preparation method of single cell |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410539642.9A CN104362281A (en) | 2014-10-13 | 2014-10-13 | Single cell of high-voltage lithium ion battery and preparation method of single cell |
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| CN104362281A true CN104362281A (en) | 2015-02-18 |
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| CN201410539642.9A Pending CN104362281A (en) | 2014-10-13 | 2014-10-13 | Single cell of high-voltage lithium ion battery and preparation method of single cell |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2002216854A (en) * | 2001-01-23 | 2002-08-02 | Toyota Motor Corp | Manufacturing method of bipolar secondary cell, and bipolar secondary cell |
| CN201936950U (en) * | 2011-01-25 | 2011-08-17 | 深圳市力赛科技有限公司 | Battery with coiling power of a plurality of pole pieces |
| CN102299294A (en) * | 2011-07-14 | 2011-12-28 | 杭州万好万家动力电池有限公司 | Fragment type cell and preparation method thereof |
| CN204204947U (en) * | 2014-10-13 | 2015-03-11 | 珠海市鹏辉电池有限公司 | The monomer battery core of high-voltage lithium ion battery |
-
2014
- 2014-10-13 CN CN201410539642.9A patent/CN104362281A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002216854A (en) * | 2001-01-23 | 2002-08-02 | Toyota Motor Corp | Manufacturing method of bipolar secondary cell, and bipolar secondary cell |
| CN201936950U (en) * | 2011-01-25 | 2011-08-17 | 深圳市力赛科技有限公司 | Battery with coiling power of a plurality of pole pieces |
| CN102299294A (en) * | 2011-07-14 | 2011-12-28 | 杭州万好万家动力电池有限公司 | Fragment type cell and preparation method thereof |
| CN204204947U (en) * | 2014-10-13 | 2015-03-11 | 珠海市鹏辉电池有限公司 | The monomer battery core of high-voltage lithium ion battery |
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Application publication date: 20150218 |
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