CN101635369A - Lithium-ion power battery - Google Patents
Lithium-ion power battery Download PDFInfo
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- CN101635369A CN101635369A CN200910032832A CN200910032832A CN101635369A CN 101635369 A CN101635369 A CN 101635369A CN 200910032832 A CN200910032832 A CN 200910032832A CN 200910032832 A CN200910032832 A CN 200910032832A CN 101635369 A CN101635369 A CN 101635369A
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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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Abstract
The invention relates to a lithium-ion power battery, comprising a laminated battery cell (16). The laminated battery cell (16) comprises negative pole pieces (9), positive pole pieces (10) and insulating diaphragms (7), wherein, the negative pole pieces (9) and the positive pole pieces (10) are sequentially arrayed at intervals and are separated by the insulating diaphragms (7); the negative pole pieces (9) are all connected with negative pole lug connectors (21) by fixing parts (20); the positive pole pieces (10) are all connected with positive pole lug connectors (22) by the fixing parts (20); paper clip films (8) are filled between the positive pole pieces (10) and the insulating diaphragms (7) connected at both sides; the paper clip films (8) are filled between the outermost insulating diaphragm (7) and the outermost negative pole piece (9); a heat conduction film (6) is filled outside the outermost insulating diaphragm (7). The lithium-ion power battery features lower internal resistance, high discharge rate, high charge efficiency, long cycle life and high safety.
Description
Technical field
The present invention relates to a kind of rechargeable battery, particularly a kind of lithium-ion-power cell belongs to the electrokinetic cell field, and being mainly used in the lithium-ion-power cell is the various hybrid automobiles of power source and pure electric automobile etc.
Background technology
The primary structure of lithium-ion-power cell has two kinds at present, a kind of is that rolled electric core is encapsulated in the formula that rolls lithium-ion-power cell in circle or the square shell, but the heat radiation of electric core only depends on the gaseous exchange exchange of inner space and the medium heat conduction of minimum part in this battery operated process, therefore this structure can not solve heat dissipation problem effectively all the time, this just causes this structure can not accomplish big capacity (can only about 10Ah) lithium-ion-power cell.Even some producer can do capacity greatly, also can make the very fast decay of battery capacity owing to temperature rise can not get solving, shortened the life-span of battery greatly, even burst, lose more than gain.Therefore be that the folded lamination electricity core that makes is encapsulated in laminated type lithium-ion-power cell in circle or the square shell through improving second kind of present lithium-ion-power cell structure, it have heat conduction and heat radiation effective, can do high capacity cell, fail safe is good, advantage such as have extended cycle life, particularly its internal resistance is low, power density is high, high its superiority that more makes of specific energy is outstanding.The lamination electricity core of this laminated type lithium-ion-power cell includes negative plate, positive plate and insulation diaphragm, negative plate and positive plate are successively alternately, separate by insulation diaphragm between negative plate and the positive plate, the outside of outermost layer pole piece also is provided with insulation diaphragm, two ends, the left and right sides all with negative plate as the outermost layer pole piece, these negative plates, positive plate and insulation diaphragm are according to above-mentioned described ordering flat putting and stacking together layer by layer one by one, then generally they are wrapped as whole bag printing paper with adhesive tape, but expose top negative electrode lug and anode ear, therefore electric core also is lamination electricity core.Insulation diaphragm has the insulation property of insulating electron and the ability that liquid is held in imbibition, present this laminated type lithium-ion-power cell exists following defective: (1), electrolyte volatilize easily, it is low to cause insulation diaphragm electrolyte to hold rate, the electrolyte content that is adsorbed on the lamination electricity core insulation barrier film is few, and this makes lithium-ion-power cell produce activation resistance, causes internal resistance than higher, discharge-rate is low, make the lithium-ion-power cell heating or damage charge efficiency decline, cycle life decline; (2), existing laminated type lithium-ion-power cell temperature rise heating problem solve always undesirable, this has also caused the shortening of battery cycle life.Because above-mentioned defective defective makes existing laminated type lithium-ion-power cell cycle life generally about 1000 times.Therefore want further to improve the quality of lithium-ion-power cell, need to solve the problem that electrolyte on the lamination electricity core insulation barrier film is held the low and battery heat radiation of rate, but this is the difficult problem that can't fundamentally solve always.
Summary of the invention
The purpose of this invention is to provide the lithium-ion-power cell that the absorption electrolyte content is many on a kind of lamination electricity core insulation barrier film, internal resistance is lower, discharge-rate is high, charge efficiency is high, have extended cycle life.
The technical scheme that realizes above-mentioned purpose is: a kind of lithium-ion-power cell, comprise shell and lamination electricity core, shell is encapsulated in the outside of lamination electricity core, shell is provided with breach, breach includes installing port and liquid injection port, negative lug joint and positive pole ear joint are fixed on the shell, negative lug joint top is negative terminals, positive pole ear joint top is positive terminal, negative terminals and positive terminal stretch out housing exterior by the installing port on the breach, lamination electricity core includes negative plate, positive plate and insulation diaphragm, negative plate is asked arrangement successively mutually with positive plate, separate by insulation diaphragm between negative plate and the positive plate, the outside of outermost layer pole piece also is provided with insulation diaphragm, two ends, the left and right sides all with negative plate as the outermost layer pole piece, all negative plates all are connected with the negative lug joint by fixture, all positive plates all are connected with the positive pole ear joint by fixture, all dosed the folder film between the insulation diaphragm that positive plate and both sides join, dosed the folder film between outermost insulation diaphragm and the outermost layer negative plate, heat conducting film has also been dosed in the outside of outermost insulation diaphragm.
Further, film and a slice Copper Foil that described negative plate is made by two graphite materials are formed, and Copper Foil is clamped between the film that two graphite materials make, and as negative electrode lug, and have the hole that allows fixture pass on this negative electrode lug on the Copper Foil.
Further, film and a slice aluminium foil that described positive plate is made by two LiFePO 4 materials are formed, and aluminium foil is clamped between the film that two LiFePO 4 materials make, and as anode ear, and have the hole that allows fixture pass on this anode ear on the aluminium foil.
Further, described insulation diaphragm is made up of the film of two PP material and the film of a slice PE material, and the film of PE material is clamped between the film of two PP material.
Further, described heat conducting film is a high temperature Teflon film.
Further, described shell is that stainless steel material is made
Further, the two ends up and down of described shell are installed with the battery case insulating case.
Further, described shell includes casing and cover plate, breach is opened on the cover board, breach also includes venting, post the safety anti-explosive film on the venting, the electronic mounting plate is housed below the cover plate, has down breach on the electronic mounting plate with on the corresponding position of breach, following breach includes location and installation mouth, fluid injection port and explosion-proof through hole.
Further, described safety anti-explosive film is a copper film.
After adopting technique scheme, have a lot of benefits: the present invention adopts is all to have dosed the folder film between the insulation diaphragm that joins of positive plate and both sides, dosed the folder film between outermost insulation diaphragm and the outermost layer negative plate, heat conducting film has also been dosed in the outside of outermost insulation diaphragm.Because the folder film of dosing can further adsorb electrolyte, the electrolyte content of absorption increases greatly, the folder film is to the raising of electrolyte adsorption rate, the rate of holding of electrolyte on the insulation diaphragm is increased, so absorption electrolyte content abundance on the lamination electricity core insulation barrier film, the participation amount of electrolyte is big in the inside battery chemical reaction process like this, therefore internal resistance of the present invention is lower, the discharge-rate height, the charge efficiency height, cycle life is longer.And the isolation that the heat conducting film of dosing finishes as lamination electricity core two ends, can increase lamination electricity core and shell conductive coefficient and insulation property, play better insulation and heat conduction and heat radiation effect, solved the problem of temperature rise of inside battery effectively by heat radiation, make that also charge efficiency of the present invention is higher, cycle life is longer, and fail safe is higher.Cycle life of the present invention behind the employing such scheme can reach about 2000 times, is doubled than existing laminated type lithium-ion-power cell cycle life.The present invention designs ingenious, received multi-efficiencies such as improving cycle life of the present invention and fail safe greatly by the heat conducting film that increases folder film and two ends, and cost is very low, so cost performance of the present invention is very high.
Description of drawings
Fig. 1 is a main TV structure schematic diagram of the present invention;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is the left view of Fig. 1;
Fig. 4 is the A-A profile of Fig. 1;
Fig. 5 is the B-B profile of Fig. 1;
Fig. 6 is the internal structure schematic diagram that removes part 1 shell and part 4 electronic mounting plates etc.;
Fig. 7 is part 9 negative plate structural representations;
Fig. 8 is part 10 positive plate structural representations;
Fig. 9 is part 7 insulation diaphragm structural representations;
Figure 10 is the J-J cutaway view of Fig. 7;
Figure 11 is the K-K cutaway view of Fig. 8;
Figure 12 is the L-L profile of Fig. 9;
Figure 13 is the structural representation of part 6 heat conducting films and part 8 folder films;
Figure 14 is the structural representation of part 21 negative lug joints and part 22 positive pole ear joints;
Figure 15 is the structural representation of part 26 battery case insulating cases;
Figure 16 is part 1 shell upper part spare 3 structure of cover plate schematic diagrames;
Figure 17 is the structural representation of part 4 electronic mounting plates;
Figure 18 is the structural representation of part 1 shell lower face bulk-breaking 2 casings.
Embodiment
The present invention is further detailed explanation below in conjunction with drawings and Examples.
To shown in Figure 180, a kind of lithium-ion-power cell comprises shell 1, electronic mounting plate 4 and lamination electricity core 16, also includes the negative lug joint 21 of copper material making and the positive pole ear joint 22 that aluminium is made as Fig. 1.Shell 1 adopts stainless steel material to make, heat radiation and anticorrosion effect are better like this, and shell 1 is encapsulated in the outside of electronic mounting plate 4 and lamination electricity core 16, and shell 1 includes casing 2 and cover plate 3, electronic mounting plate 4 is housed below the cover plate 3, and electronic mounting plate 4 is made by insulating material.Shell 1 is provided with breach 17, breach 17 is opened on cover plate 3, breach 17 includes two installing port 17-1 and a liquid injection port 17-2 and a venting 17-3, post the safety anti-explosive film 19 that copper film is made on the venting 17-3, have down breach 18 on the electronic mounting plate 4 with on the breach 17 corresponding positions, following breach 18 includes two location and installation mouth 18-1 and a fluid injection port 18-2 and an explosion-proof through hole 18-3.Liquid injection port 17-2 opens the side at cover plate 3, venting 17-3 opens in cover plate 3 central authorities, liquid injection port 17-2 opens in venting 17-3 both sides, liquid injection port 17-2 is just in time corresponding with fluid injection port 18-2 position, substitute the bad for the good in the shell 1 behind the electrolyte, rivet 23 rivetings are gone in the liquid injection port 17-2 above the fluid injection port 18-2 to seal.All have boss 4-1 above two location and installation mouth 18-1, two installing port 17-1 of the breach 17 on the cover plate 3 are enclosed within boss 4-1 outside.Negative lug joint 21 tops are the sub-21-1 of negative terminals, positive pole ear joint 22 tops are the sub-22-1 of positive terminal, all has external screw thread on sub-21-1 of negative terminals and the sub-22-1 of positive terminal, negative lug joint 21 bottoms have the connecting hole 21-2 that connects negative electrode lug 9-1-1, positive pole ear joint 22 bottoms have the connecting hole 22-2 that connects anode ear 10-1-1, sub-21-1 of negative terminals and the sub-22-1 of positive terminal stretch out the installing port 17-1 outside of shell 1 by the location and installation mouth 18-1 on the electronic mounting plate 4, on sub-21-1 of negative terminals and the sub-22-1 of positive terminal, put insulating washer 24 respectively, and screw on hold-down nut 25 and fix.Negative lug joint 21 and positive pole ear joint 22 are fixed on the cover plate 3 of shell 1.Lamination electricity core 16 includes negative plate 9, positive plate 10 and insulation diaphragm 7, also include folder film 8 and the heat conducting film 6 dosed, negative plate 9 and positive plate 10 are successively alternately, separate by insulation diaphragm 7 between negative plate 9 and the positive plate 10, the outside of outermost layer pole piece also is provided with insulation diaphragm 7, two ends, the left and right sides all with negative plate 9 as the outermost layer pole piece, all negative plates 9 all are connected with negative lug joint 21 by fixture 20, all positive plates 10 all are connected with positive pole ear joint 22 by fixture 20, all dosed folder film 8 between the insulation diaphragm 7 that positive plate 10 and both sides join, dosed folder film 8 between outermost insulation diaphragm 7 and the outermost layer negative plate 9, heat conducting film 6 has also been dosed in the outside of outermost insulation diaphragm 7, isolates as finishing.Just be followed successively by: heat conducting film 6, insulation diaphragm 7, folder film 8, negative plate 9 from finishing to be partitioned to putting in order of outermost layer pole piece; What join from the inside to surface with positive plate 10 both sides of centre is folder film 8, insulation diaphragm 7 successively, and with the still insulation diaphragm 7 that negative plate 9 both sides of centre join, do not dose folder film 8.Described heat conducting film 6 is a high temperature Teflon film.With heat conducting film 6, insulation diaphragm 7, folder film 8, negative plate 9 and positive plate 10 press said sequence stacked layer by layer good after, adhesive tape 5 is wrapped in the outside, will expose negative electrode lug 9-1-1 and the anode ear 10-1-1 above the positive plate 10 above the negative plate 9 during bag.
As Fig. 4 and shown in Figure 10, film 9-2 and a slice Copper Foil 9-1 that described negative plate 9 is made by two graphite materials form, Copper Foil 9-1 is clamped between the film 9-2 of two graphite materials making, Copper Foil 9-1 upper end is as negative electrode lug 9-1-1, and has the hole 9-3 that allows fixture 20 pass on this negative electrode lug 9-1-1.A plurality of negative electrode lug 9-1-1 stack and form the negative electrode lug group, and fixture 20 is fixed together negative electrode lug group and negative lug joint 21 by hole 9-3 and connecting hole 21-2.Heat on the negative plate 9 and electric current are directly passed to negative lug joint 21 by negative electrode lug group and fixture 20 set bolts, and heat distributes in time by negative lug joint 21.
As Fig. 5 and shown in Figure 11, film 10-2 and a slice aluminium foil 10-1 that described positive plate 10 is made by two LiFePO 4 materials form, aluminium foil 10-1 is clamped between the film 10-2 of two LiFePO 4 materials making, aluminium foil 10-1 upper end is as anode ear 10-1-1, and has the hole 10-3 that allows fixture 20 pass on this anode ear 10-1-1.A plurality of anode ear 10-1-1 stack and form the anode ear group, and fixture 20 is fixed together anode ear group and positive pole ear joint 22 by hole 10-3 and connecting hole 22-2.Heat on the positive plate 10 and electric current are directly passed to positive pole ear joint 22 by anode ear group and fixture 20 set bolts, and heat distributes in time by positive pole ear joint 22.
As shown in figure 12, described insulation diaphragm 7 is made up of the film 7-2 of two PP material and the film 7-1 of a slice PE material, and the film 7-1 of PE material is clamped between the film 7-2 of two PP material.
As Fig. 1, Fig. 2 and shown in Figure 15, the two ends up and down of shell 1 are installed with battery case insulating case 26, and battery case insulating case 26 is made by insulating material.Battery case insulating case 26 is detachable.
A plurality of the present invention can be combined into the lithium-ion-power cell group and use, to improve the power of lithium-ion-power cell.When a plurality of the present invention are combined into the lithium-ion-power cell group when using, battery case insulating case 26 can play the effect of insulation, can make again to remain gappedly between a plurality of shells of the present invention 1, helps heat radiation, improves the life-span that recycles of the present invention.When single the present invention used, battery case insulating case 26 can remove or not adorn.
The invention is not restricted to the foregoing description, the technical scheme that all employings are equal to replacement or equivalence replacement formation all belongs to the scope of protection of present invention.
Claims (9)
1, a kind of lithium-ion-power cell, comprise shell (1) and lamination electricity core (16), shell (1) is encapsulated in the outside of lamination electricity core (16), shell (1) is provided with breach (17), breach (17) includes installing port (17-1) and liquid injection port (17-2), negative lug joint (21) and positive pole ear joint (22) are fixed on the shell (1), negative lug joint (21) top is negative terminals (21-1), positive pole ear joint (22) top is positive terminal (22-1), negative terminals (21-1) and positive terminal (22-1) stretch out shell (1) outside by the installing port (17-1) on the breach (17), lamination electricity core (16) includes negative plate (9), positive plate (10) and insulation diaphragm (7), negative plate (9) and positive plate (10) are successively alternately, separate by insulation diaphragm (7) between negative plate (9) and the positive plate (10), the outside of outermost layer pole piece also is provided with insulation diaphragm (7), two ends, the left and right sides all with negative plate (9) as the outermost layer pole piece, all negative plates (9) all are connected with negative lug joint (21) by fixture (20), all positive plates (10) all are connected with positive pole ear joint (22) by fixture (20), it is characterized in that: all dosed folder film (8) between the insulation diaphragm (7) that positive plate (10) and both sides join, dosed folder film (8) between outermost insulation diaphragm (7) and the outermost layer negative plate (9), heat conducting film (6) has also been dosed in the outside of outermost insulation diaphragm (7).
2, lithium-ion-power cell according to claim 1, it is characterized in that: film (9-2) and a slice Copper Foil (9-1) that described negative plate (9) is made by two graphite materials are formed, Copper Foil (9-1) is clamped between the film (9-2) of two graphite materials making, Copper Foil (9-1) upper end is as negative electrode lug (9-1-1), and has the hole (9-3) that allows fixture (20) pass on this negative electrode lug (9-1-1).
3, lithium-ion-power cell according to claim 1, it is characterized in that: film (10-2) and a slice aluminium foil (10-1) that described positive plate (10) is made by two LiFePO 4 materials are formed, aluminium foil (10-1) is clamped between the film (10-2) of two LiFePO 4 materials making, aluminium foil (10-1) upper end is as anode ear (10-1-1), and has the hole (10-3) that allows fixture (20) pass on this anode ear (10-1-1).
4, lithium-ion-power cell according to claim 1, it is characterized in that: described insulation diaphragm (7) is made up of the film (7-2) of two PP material and the film (7-1) of a slice PE material, and the film of PE material (7-1) is clamped between the film (7-2) of two PP material.
5, lithium-ion-power cell according to claim 1 is characterized in that: described heat conducting film (6) is a high temperature Teflon film.
6, lithium-ion-power cell according to claim 1 is characterized in that: described shell (1) is made for stainless steel material.
7, lithium-ion-power cell according to claim 1 is characterized in that: the two ends up and down of described shell (1) are installed with battery case insulating case (26).
8, lithium-ion-power cell according to claim 1, it is characterized in that: described shell (1) includes casing (2) and cover plate (3), breach (17) is opened on cover plate (3), breach (17) also includes venting (17-3), post safety anti-explosive film (19) on the venting (17-3), electronic mounting plate (4) is housed below the cover plate (3), electronic mounting plate (4) upward and on the corresponding position of breach (17) has down breach (18), and following breach (18) includes location and installation mouth (18-1), fluid injection port (18-2) and explosion-proof through hole (18-3).
9, lithium-ion-power cell according to claim 8 is characterized in that: described safety anti-explosive film (19) is a copper film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910032832A CN101635369A (en) | 2009-06-04 | 2009-06-04 | Lithium-ion power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910032832A CN101635369A (en) | 2009-06-04 | 2009-06-04 | Lithium-ion power battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101635369A true CN101635369A (en) | 2010-01-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910032832A Pending CN101635369A (en) | 2009-06-04 | 2009-06-04 | Lithium-ion power battery |
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| Country | Link |
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| CN (1) | CN101635369A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103151564A (en) * | 2013-02-20 | 2013-06-12 | 东风汽车公司 | Novel battery module structure |
| CN103296313A (en) * | 2012-02-22 | 2013-09-11 | 江苏罗丰电源科技有限公司 | Lithium ion power battery |
| CN103311568A (en) * | 2012-03-14 | 2013-09-18 | 昆山正国能源科技有限公司 | Large-capacity lithium iron phosphate power battery |
-
2009
- 2009-06-04 CN CN200910032832A patent/CN101635369A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103296313A (en) * | 2012-02-22 | 2013-09-11 | 江苏罗丰电源科技有限公司 | Lithium ion power battery |
| CN103311568A (en) * | 2012-03-14 | 2013-09-18 | 昆山正国能源科技有限公司 | Large-capacity lithium iron phosphate power battery |
| CN103151564A (en) * | 2013-02-20 | 2013-06-12 | 东风汽车公司 | Novel battery module structure |
| CN103151564B (en) * | 2013-02-20 | 2015-05-27 | 东风汽车公司 | Novel battery module structure |
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Application publication date: 20100127 |