CN203386863U - Lithium ion battery and lithium ion battery pack - Google Patents
Lithium ion battery and lithium ion battery pack Download PDFInfo
- Publication number
- CN203386863U CN203386863U CN201320406176.8U CN201320406176U CN203386863U CN 203386863 U CN203386863 U CN 203386863U CN 201320406176 U CN201320406176 U CN 201320406176U CN 203386863 U CN203386863 U CN 203386863U
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- China
- Prior art keywords
- lithium ion
- ion battery
- negative
- plate
- pole
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- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 72
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 238000007789 sealing Methods 0.000 claims abstract description 28
- 229910052751 metal Inorganic materials 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims abstract description 7
- 230000004888 barrier function Effects 0.000 claims description 20
- 235000012771 pancakes Nutrition 0.000 claims description 14
- 239000011149 active material Substances 0.000 claims description 9
- 229910052493 LiFePO4 Inorganic materials 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 3
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 3
- 239000010941 cobalt Substances 0.000 claims description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
- OVAQODDUFGFVPR-UHFFFAOYSA-N lithium cobalt(2+) dioxido(dioxo)manganese Chemical compound [Li+].[Mn](=O)(=O)([O-])[O-].[Co+2] OVAQODDUFGFVPR-UHFFFAOYSA-N 0.000 claims description 3
- 238000004804 winding Methods 0.000 abstract 3
- 230000005855 radiation Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000005030 aluminium foil Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 206010016766 flatulence Diseases 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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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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- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
Abstract
The utility model relates to a lithium ion battery and a lithium ion battery pack. The lithium ion battery provided by the utility model comprises a battery pole group, wherein the battery pole group comprises a positive electrode plate, a negative electrode plate and an insulating layer and forms a flat structure by mutually winding or stacking the positive electrode plate and the negative electrode plate; the insulating layer is arranged between the positive electrode plate and the negative electrode plate and is used for isolating the positive electrode plate from the negative electrode plate; on one end face of the flat structure which is formed by mutually winding or stacking the positive electrode plate and the negative electrode plate, the positive electrode plate is higher than the insulating layer, and the positive electrode plate higher than the insulating layer is connected with a positive electrode on a sealing device through metal; and on the other end face of the flat structure which is formed by mutually winding or stacking the positive electrode plate and the negative electrode plate, the negative electrode plate is higher than the insulating layer, and the negative electrode plate higher than the insulating layer is connected with a negative electrode on the sealing device through metal. The lithium ion battery has excellent heat-dissipating performance, guarantees high high-magnification charge/discharge performance and also guarantees high safety of the battery.
Description
Technical field
The utility model belongs to field of batteries, especially relates to a kind of lithium ion battery and lithium ion battery group.
Background technology
Lithium ion battery is because the advantages such as its voltage is high, specific energy large, have extended cycle life, security performance is good are widely used in modern society.Existing lithium ion battery can be divided three classes by its structure, i.e. cylindrical battery, rectangular cell and button cell, and the lithium ion battery of above-mentioned three kinds of structures is respectively had its own advantage, and its weak point is also arranged.Wherein, the cylindrical battery advantage is that its columniform structure has extremely strong binding force to the battery pole group, and battery not there will be utmost point group to expand in cyclic process, the problem such as subside, and its stability is better; Simultaneously, due to the tab welding of cylindrical battery, on two end face, be difficult to arrange a plurality of lugs, thereby its power of battery is not very large always, and its axially heat radiation is slowly; Rectangular cell generally has a plurality of lugs, its battery high rate performance is outstanding, but, the rectangular cell surrounding is as the support force of structure constraint, the diagonal crossover location is stressed the weakest, thereby and because very easily causing utmost point group to expand, inner flatulence causes battery structure damage, hydraulic performance decline, bad stability in the circulating battery process; Simultaneously, at it, carry out the process of high power charging-discharging, the more heat of its inner generation, and, only by the heat radiation of battery upper and lower surface, can't meet the requirement that battery temperature is regulated, and then cause inner aerogenesis aggravation, battery performance is decayed more obvious; The inner lamination process that adopts of button cell is realized, positive/negative plate active material and battery plus-negative plate directly are connected by the both positive and negative polarity active material over against, both positive and negative polarity, poor electric conductivity, use aspect portable power supplies so button cell is multiplex, can not require high-power output.
In actual use, above-mentioned three kinds of structure batteries have the deficiency of following aspect;
At first, in the battery of above-mentioned three kinds of structures, cylindrical battery is also by its upper and lower surface radiations heat energy by axial two end face heat transfers, rectangular cell and button cells, and all to pass through the both positive and negative polarity active material of battery in its heat radiation process, and battery plus-negative plate active material thermal transmission coefficient≤1W/m.k, thereby cause the radiating efficiency of above-mentioned three kinds of battery structures lower;
Secondly, the charge/discharge capacity impact of the LiFePO4 above-mentioned three kinds of battery structures adopted due to temperature, ternary material etc. is larger, when the battery of above-mentioned three kinds of structures forms battery pack, temperature contrast between battery individuality on diverse location can affect the charge/discharge capacity of battery, be embodied in, discharge and recharge pressure reduction large, affect capacity and the cycle life of whole battery pack.
In addition, the electric current of the inside lithium ion cell of above-mentioned three kinds of structures first collects near lug, then by lug, set up current channel and outwards export, cause thus the high rate performance of battery to be limited to the lug number and conductive capability can not be fully played, make the battery charging interval longer.
The utility model content
The utility model is for solving the deficiency that radiating efficiency is low, high rate performance can not be not fully exerted existed in above-mentioned prior art, the utility model provides a kind of lithium ion battery and lithium ion battery group, it not only has higher radiating efficiency, can also give full play to the high rate performance of battery, the charging interval of effectively reducing battery simultaneously.
The utility model is for the lithium ion battery provided is provided, comprise the sealing device with anodal and two polarity of negative pole, and the battery pole group of being located at sealing device inside, wherein, described battery pole group comprises positive plate, negative plate and insulating barrier, and mutually reel or stack by described positive plate and negative plate, form the pancake structure; Described insulating barrier is located between described positive plate and negative plate, for making positive plate and negative plate, mutually isolates; Described positive plate and negative plate are mutually reeled or are stacked and on an end face of the pancake structure that forms, and positive plate is higher than insulating barrier, and are connected with the positive pole on sealing device higher than the positive plate of insulating barrier; Described positive plate and negative plate are mutually reeled or are stacked and on another end face of the pancake structure that forms, and negative plate is higher than insulating barrier, and are connected with the negative pole on sealing device higher than the negative plate of insulating barrier.
Preferably, described positive plate comprises a plurality of anodal elementary cells, and is formed by connecting by described a plurality of anodal elementary cells; Be provided with temperature switch and excess flow switch between described two anodal elementary cells that are connected, and only be connected with excess flow switch by described temperature switch between described anodal elementary cell; Described negative plate comprises a plurality of negative pole elementary cells, and is formed by connecting by described a plurality of negative pole elementary cells; Be provided with temperature switch and excess flow switch between described two negative pole elementary cells that are connected, and only be connected with excess flow switch by described temperature switch between described negative pole elementary cell.
Preferably, described positive plate and negative plate are mutually reeled or are stacked and the diameter radially or the width that form the pancake structure is greater than its axial height.
Preferably, the positive pole on described sealing device adopts LiFePO4, LiMn2O4, nickle cobalt lithium manganate or cobalt acid lithium as anodal active material.
Preferably, the positive pole of described positive plate and sealing device, and by being weldingly connected, connect between the negative pole of negative plate and sealing device.
The lithium ion battery group that the utility model provides, be formed by connecting by a plurality of lithium ion batteries, and wherein, described lithium ion battery adopts lithium ion battery as described as above-mentioned scheme.
Preferably, the connector that connects lithium ion battery in described lithium ion battery group is provided with heater and heat abstractor, in order to the consistency of the temperature of each lithium ion battery in the temperature to the lithium ion battery group and lithium ion battery group, is regulated.
The lithium ion battery that the utility model provides has following beneficial effect;
At first, between the positive plate of the lithium ion battery that the utility model provides and the positive pole of sealing device, between the negative pole of negative plate and sealing device, all by metal, be connected, take copper and aluminium as example, its thermal transmission coefficient is respectively several 401W/m.K and 237W/m.K, and hence one can see that, by active material, dispels the heat in compared to existing technology, its thermal transmission coefficient is less than 1W/m.k, and the 200-400 that the radiating efficiency of the lithium ion battery that the utility model provides is prior art doubly.
Secondly, the utility model provides the utmost point group upper and lower end face of lithium ion battery directly to be connected with the both positive and negative polarity end face of battery, the pole piece internal current is along pole piece Width cross conduction, but not of the prior artly first collect near lug, thereby optimized the inside battery current density, improve the conduction of velocity of inside battery electric current, thereby improved the high rate charge-discharge performance of lithium ion battery.
The lithium ion battery group that the utility model provides, the lithium ion battery that it adopts the utility model to provide, axial heat radiation by the cake structure, its radiating efficiency significantly improves, thereby reduced the temperature contrast that lithium ion battery can not scatter and disappear and cause in time because of heat production, make the lithium ion battery group to discharge and recharge pressure reduction smaller, there is longer cycle life.
The accompanying drawing explanation
The structural representation of the lithium ion battery that Fig. 1 provides for the utility model;
The structural representation of the battery pole group of the lithium ion battery that Fig. 2 provides for the utility model.
Embodiment
For making those skilled in the art understand better the technical solution of the utility model, lithium ion battery the utility model provided below in conjunction with accompanying drawing is described in detail.
The structural representation of the lithium ion battery that Fig. 1 provides for the utility model; The structural representation of the battery pole group of the lithium ion battery that Fig. 2 provides for the utility model.As shown in Figures 1 and 2, the lithium ion battery that the utility model provides comprises the sealing device 1 with anodal and two polarity of negative pole, and the battery pole group 2 of being located at sealing device inside; Wherein, sealing device 1 comprises upper cover 11 and lower cover 12; Battery pole group 2 comprises positive plate 21, negative plate 22 and insulating barrier 23, and positive plate 21 is reeled mutually with negative plate 22, form the pancake structure, and the diameter radially of this pancake structure is greater than its axial height; Insulating barrier 23 is located between positive plate 21 and negative plate 22, for making positive plate 21 and negative plate 22, mutually isolates; Positive plate 21 is reeled mutually with negative plate 22 and on an end face of the pancake structure that forms, and positive plate 21 is higher than insulating barrier 23, and is connected with the positive pole on sealing device 1 higher than the positive plate 21 of insulating barrier 23; Positive plate 21 is reeled mutually with negative plate 22 and on another end face of the pancake structure that forms, and negative plate 22 is higher than insulating barrier 23, and is connected with the negative pole on sealing device higher than the negative plate 22 of insulating barrier 23.
Above-mentioned pancake structure, can be patty, square or regular polygon structure, and the application does not do restriction to the contour shape of pancake structure.
In preferred version, sheet metal can adopt the copper aluminium foil as the both positive and negative polarity base material.Described insulating barrier 23 can adopt barrier film.
In the present embodiment, positive plate 21 comprises a plurality of anodal elementary cells, and is formed by connecting by a plurality of anodal elementary cells; Be provided with temperature switch and excess flow switch between two anodal elementary cells that are connected, and only be connected with excess flow switch by temperature switch between the anodal elementary cell be connected; Negative plate 22 comprises a plurality of negative pole elementary cells, and is formed by connecting by a plurality of negative pole elementary cells; Be provided with temperature switch and excess flow switch between two negative pole elementary cells that are connected, and only be connected with excess flow switch by temperature switch between the negative pole elementary cell be connected.
Particularly, in the present embodiment, the positive pole on sealing device adopts LiFePO4, LiMn2O4, nickle cobalt lithium manganate or cobalt acid lithium as anodal active material.
Particularly, in the present embodiment, the positive pole of positive plate 21 and sealing device 1, and by being weldingly connected, connect between the negative pole of negative plate 22 and sealing device 1.
In sum, between the positive plate 21 of the lithium ion battery that the utility model above-described embodiment provides and the positive pole of sealing device 1, between the negative pole of negative plate 22 and sealing device 1, all by metal, be connected, take copper and aluminium as example, its thermal transmission coefficient is respectively several 401W/m.K and 237W/m.K, and hence one can see that, by active material, dispels the heat in compared to existing technology, its thermal transmission coefficient is less than 1W/m.k, and the 200-400 that the radiating efficiency of the lithium ion battery that the utility model provides is prior art doubly.
Secondly, battery pole group 2 upper and lower end faces of the lithium ion battery that the utility model above-described embodiment provides directly are connected with the both positive and negative polarity end face of battery, the pole piece internal current is along pole piece Width cross conduction, but not of the prior artly first collect near lug, thereby optimized the inside battery current density, improve the conduction of velocity of inside battery electric current, thereby improved the high rate charge-discharge performance of battery.
As another scheme, the utility model also provides a kind of lithium ion battery group, and it is formed by connecting by a plurality of lithium ion batteries, and wherein, the lithium ion battery provided in the utility model above-described embodiment is provided above-mentioned lithium ion battery.
Particularly, a plurality of lithium ion batteries that form the lithium ion battery group interconnect by connector, this connector is provided with heater and heat abstractor, in order to the consistency of the temperature of each lithium ion battery in the temperature to the lithium ion battery group and lithium ion battery group, is regulated.
The lithium ion battery group that the utility model above-described embodiment provides, the lithium ion battery that it adopts the utility model to provide, axial heat radiation by flat structure, its radiating efficiency significantly improves, thereby reduced the temperature contrast that lithium ion battery can not scatter and disappear and cause in time because of heat production, make the lithium ion battery group to discharge and recharge pressure reduction smaller, there is longer cycle life.
Be understandable that, above execution mode is only the illustrative embodiments adopted for principle of the present utility model is described, yet the utility model is not limited to this.For those skilled in the art, in the situation that do not break away from spirit of the present utility model and essence, can make various modification and improvement, these modification and improvement also are considered as protection range of the present utility model.
Claims (7)
1. a lithium ion battery, comprise the sealing device with anodal and two polarity of negative pole, and the battery pole group of being located at sealing device inside, it is characterized in that, described battery pole group comprises positive plate, negative plate and insulating barrier, and mutually reel or stack by described positive plate and negative plate, form the pancake structure;
Described insulating barrier is located between described positive plate and negative plate, for making positive plate and negative plate, mutually isolates;
Described positive plate and negative plate are mutually reeled or are stacked and on an end face of the pancake structure that forms, and positive plate is higher than insulating barrier, and by metal, are connected with the positive pole on sealing device higher than the positive plate of insulating barrier;
Described positive plate and negative plate are mutually reeled or are stacked and on another end face of the pancake structure that forms, and negative plate is higher than insulating barrier, and by sheet metal, are connected with the negative pole on sealing device higher than the negative plate of insulating barrier.
2. lithium ion battery according to claim 1, is characterized in that, described positive plate comprises a plurality of anodal elementary cells, and be formed by connecting by described a plurality of anodal elementary cells; Be provided with temperature switch and excess flow switch between described two anodal elementary cells that are connected, and only be connected with excess flow switch by described temperature switch between described anodal elementary cell;
Described negative plate comprises a plurality of negative pole elementary cells, and is formed by connecting by described a plurality of negative pole elementary cells; Be provided with temperature switch and excess flow switch between described two negative pole elementary cells that are connected, and only be connected with excess flow switch by described temperature switch between described negative pole elementary cell.
3. lithium ion battery according to claim 1, is characterized in that, described positive plate and negative plate are mutually reeled or stacked and the diameter radially or the width that form the pancake structure is greater than its axial height.
4. lithium ion battery according to claim 1, is characterized in that, the positive pole on described sealing device adopts LiFePO4, LiMn2O4, nickle cobalt lithium manganate or cobalt acid lithium as anodal active material.
5. lithium ion battery according to claim 1, is characterized in that, the positive pole of described positive plate and sealing device, and by being weldingly connected, connect between the negative pole of negative plate and sealing device.
6. a lithium ion battery group, be formed by connecting by a plurality of lithium ion batteries, it is characterized in that, described lithium ion battery adopts as the described lithium ion battery of claim 1-5 any one.
7. lithium ion battery group according to claim 6, it is characterized in that, the connector that connects lithium ion battery in described lithium ion battery group is provided with heater and heat abstractor, in order to the consistency of the temperature of each lithium ion battery in the temperature to the lithium ion battery group and lithium ion battery group, is regulated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320406176.8U CN203386863U (en) | 2013-07-09 | 2013-07-09 | Lithium ion battery and lithium ion battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320406176.8U CN203386863U (en) | 2013-07-09 | 2013-07-09 | Lithium ion battery and lithium ion battery pack |
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| Publication Number | Publication Date |
|---|---|
| CN203386863U true CN203386863U (en) | 2014-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320406176.8U Expired - Fee Related CN203386863U (en) | 2013-07-09 | 2013-07-09 | Lithium ion battery and lithium ion battery pack |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103346356A (en) * | 2013-07-09 | 2013-10-09 | 田秀君 | Lithium ion battery as well as preparation method thereof and lithium-ion battery pack |
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2013
- 2013-07-09 CN CN201320406176.8U patent/CN203386863U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103346356A (en) * | 2013-07-09 | 2013-10-09 | 田秀君 | Lithium ion battery as well as preparation method thereof and lithium-ion battery pack |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: DONGGUAN NUOWEI NEW ENERGY CO., LTD. Free format text: FORMER OWNER: TIAN XIUJUN Effective date: 20150811 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150811 Address after: Fenggang Wulian Village town 523695 Guangdong city of Dongguan Province Hing Road Building A4 Fengfa Industrial Zone Patentee after: Dongguan Norwich new energy Co. Ltd. Address before: 301700 Tianjin city Wuqing District No. 23 West Lake Garden Patentee before: Tian Xiujun |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20180201 Address after: Jiangxi city of Ganzhou Province, Longnan County Longnan economic and Technological Development Zone of electronic information industry of Ganzhou science and Technology City Patentee after: Norwich Ganzhou new energy Co. Ltd. Address before: Fenggang Wulian Village town 523695 Guangdong city of Dongguan Province Hing Road Building A4 Fengfa Industrial Zone Patentee before: Dongguan Norwich new energy Co. Ltd. |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140108 Termination date: 20200709 |
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| CF01 | Termination of patent right due to non-payment of annual fee |