CN202758954U - Pole ear output connector for multi-layer positive-negative pole of high ratio power poly-lithium battery - Google Patents
Pole ear output connector for multi-layer positive-negative pole of high ratio power poly-lithium battery Download PDFInfo
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- CN202758954U CN202758954U CN2012204010155U CN201220401015U CN202758954U CN 202758954 U CN202758954 U CN 202758954U CN 2012204010155 U CN2012204010155 U CN 2012204010155U CN 201220401015 U CN201220401015 U CN 201220401015U CN 202758954 U CN202758954 U CN 202758954U
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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 utility model discloses a pole ear output connector for a multi-layer positive-negative pole of a high ratio power poly-lithium battery. The pole ear output connector for the multi-layer positive-negative pole of the high ratio power poly-lithium battery comprises macromolecule material insulating pieces and a plurality of pole ear metal thin pieces. The pole ear metal thin pieces are separated from one another by the macromolecule material insulating pieces to be solidified into an output connector. The technical bottlenecks of a traditional battery positive-negative pole ear that the battery temperature is overhigh, the inner portion of the battery is seriously polarized, the heat effect is concentrated, the electric current output capacity is large, and a voltage platform is excessively low due to the fact that the sectional area of an output metal conductive piece is not enough can be solved. After the pole ear connector structure of the multi-layer positive-negative pole is used, the capability of the high output ratio power of the power battery can be effectively improved; the polarization temperature of the battery can be reduced by 26%; the output voltage platform can be improved by 0.2-0.4V; simultaneously, the safety, the reliability and the consistency of the battery can be improved; the cycle performance of the battery can be improved; and the service life of the battery can be prolonged by 42%. The technical difficulty that the sectional area of a conductive current collector of the traditional battery polymer lithium-ion battery and the high output ratio power are restricted with each other can be broken through.
Description
Technical field
The utility model relates to the height output specific power heavy-current discharge applied technical field of polymer Li-ion battery, and is special relevant with a kind of high-specific-power poly-lithium battery multilayer both positive and negative polarity lug out connector.
Background technology
The energy and environment pressure that day by day increases the weight of is so that development high-specific-power energy battery becomes the certainty of industry development; country for this petroleum resources scarcity of China is even more important, and greatly developing new forms of energy is to realize that China's energy source and power safety, environmental protection and Chinese Automobile Industry ' realize the needs of great-leap-forward, sustainable development.No matter be that electric motor car energy and special equipment industry are along with technological progress is had higher requirement to the use of polymer Li-ion battery.
At present, both at home and abroad in the use of high-energy polymer lithium ion battery, such battery and battery pack are worked under the large current technique condition of height output specific power, ubiquity is owing to being that the polymer Li-ion battery major part is solid-state (or liquid-solid middle phase) electrolyte interface, conductivity is low, and its polarization phenomena are serious.And the setting of the positive single lug metallic conduction of negative output sheet thickness has strict restriction in the conventional fabrication processes, because the connector metal conducting strip too thick just can't with cell inner pole piece group always just and total negative collector carry out ultrasonic bonding, cause the battery of working under the large current technique condition of high output specific power when discharge owing to positive and negative output lug sheet metal conductive section is limited thereby formed, it is too many that single battery pole ears metallic conduction sheet cross-sectional unit nominal current density is lower than output current density, and cause temperature sharply to rise, the polarization phenomena of battery cell inside are serious, because cell integrated temperature chain conduction to the surperficial SEI film that forms of the battery active material also progressive failure along with the increase of cycle-index, has affected the useful life of battery.More seriously because the accumulation of the thermal effect of inside battery is too fast, bring because the thermal runaway platform reduces the potential safety hazard that causes to battery.
From the electrochemical principle analysis as can be known, high capacity cell is under height output specific power heavy-current discharge condition, and discharge-rate is higher, causes not that owing to the conductive section area polarization phenomena of inside battery are just more serious.The polarization of transition causes the inside battery local current densities excessive, and too large current density is so that the character of the active material in the battery (negative electrode) changes even cause the cathode material lattice to subside, thereby so that irreversible capacity increases, capacity produces decay.And this vicious circle, the destruction of part material crystals can cause the even more serious polarization phenomena of inside battery, and so circulation is gone down, and battery performance also can accelerate to descend.Therefore system adjusts the distribution of the current density of battery connector both positive and negative polarity lug metallic conduction sheet inside, and the consistency of euqalizing current density is the effective way of improving the battery high-rate discharge ability and improving the high capacity cell cycle performance.
Make in the high-energy polymer lithium ion battery in traditional traditional handicraft, as shown in Figure 1, the single pole piece composition formation at traditional traditional polymer lithium ion battery comprises: a slice copper current collector sheet metal 10, two aluminium collector sheet metals 20, two positive electrode films 30, two 20 solid electrolyte barrier films 40, two negative material films 50.Two aluminium collector sheet metals 20 are positioned at outermost, inwardly stack successively a slice positive electrode film 30, a slice 20 solid electrolyte barrier films 40, a slice negative material film 50 in each aluminium collector sheet metal 20 inboard, between two negative material films 50, stack a slice copper current collector sheet metal 10.Above-mentioned pole piece forms monolithic battery pole piece 60 as shown in Figure 2 through after encapsulating, and forms respectively positive pole ear 71 and negative lug 72 after the extension encapsulation on copper current collector sheet metal 10 and the aluminium collector sheet metal 20.
Referring to Fig. 3, Fig. 4, the cell group is to be stacked by some monolithic battery pole pieces 60 to form again, and then the in groups pressing shaping of the lug of the same polarity of all monolithic battery pole pieces 60 is exported electric conductor 80 and be clipped on the whole lug and be welded and fixed.Again as shown in Figure 5, the positive and negative conductive metal sheet 90 of welding forms the cell complete structure on the output electric conductor 80, at last as shown in Figure 6, adopts aluminum-plastic packaged rear formation polymer Li-ion battery 100.
From the above, in the traditional polymer lithium ion battery, the lug out connector is to adopt an output electric conductor 80 clamping whole lugs, is picked out by the positive and negative conductive metal sheet 90 of monolithic, the skewness of the current density of positive and negative conductive metal sheet 90 inside, the consistency of current density is poor.
Given this, the utility model is designed a kind of high-specific-power poly-lithium battery multilayer both positive and negative polarity lug out connector, and this case produces thus.
The utility model content
The utility model purpose provides a kind of high-specific-power poly-lithium battery multilayer both positive and negative polarity lug out connector, be suitable for polymer Li-ion battery multilayer both positive and negative polarity lug connection under the high-specific-power working condition, can effectively increase limited conductive area, under height output specific power operating load technical conditions, eliminate battery polarization effect and thermal effect accumulation, reduce single battery pole ears end and whole temperature rise under the high output specific power operating load technical conditions, improved the output available capacity of battery under cell voltage workbench and the large current conditions of high magnification.
In order to achieve the above object, the utility model is achieved through the following technical solutions:
A kind of high-specific-power poly-lithium battery multilayer both positive and negative polarity lug out connector comprises macromolecular material insulating trip and a plurality of lug sheet metal; The macromolecular material insulating trip is separated by the lug sheet metal and is solidified into out connector integral body.
Described macromolecular material insulating trip is PPC insulated with material sheet.
Described macromolecular material insulating trip comprises the multilayer lamellar body, and each lamellar body and lug sheet metal are spaced apart, insert fixing tool, and hot pressing becomes an overall structure.
Described macromolecular material insulating trip is an integral body, and after the lug sheet metal was equidistantly arranged, macromolecular material formed the overall structure of out connector in the injection mo(u)lding of shaper mesohigh.
Described lug sheet metal comprises positive pole ear sheet metal and negative lug sheet metal, and the positive pole ear sheet metal is the raffinal sheet metal, and the negative lug sheet metal is high-purity copper or nickel sheet metal, and both THICKNESS CONTROL are the 0.1-0.5 millimeter.
Described macromolecular material insulating trip THICKNESS CONTROL is the 0.01-0.6 millimeter.
The whole gross thickness of described out connector is controlled to be 0.5-4mm.
Described positive pole ear sheet metal, formed by the anodal raffinal sheet metal stack of multilayer, described negative lug sheet metal, be comprised of multilayer high-purity copper or the stack of nickel sheet metal, the thickness of its anodal raffinal sheet metal or high-purity copper or nickel sheet metal is between 0.005-0.5mm.
Described lug foil surfaces all has the thickness of 0.008-0.010 millimeter to get silver coating.
After adopting such scheme, the utlity model has many beneficial effects: the utility model improves the safety and reliability of battery pack, eliminate the limited battery power output in conductive current cross section low and transmit the bad hidden danger that battery core is brought because of heat, effectively reduce internal resistance 30%, pole piece consistency matching rate improves 85% in the battery, the temperature rise of battery plus-negative plate end cell lowers 26%, battery and battery pack are worked under height output specific power large current load 15-20C multiplying power technical conditions, and output capacity improves 36%.The battery polarization phenomenon reduces greatly, and the thermal effect accumulation rate reduces by 23% than original.As after the special-shaped battery core series connection of 20AH capacity, maximum temperature (last 20 seconds) is 60.5 ℃ in 2 minutes 45 seconds (cut-ff voltage 2.9V) situations of 20C multiplying power discharging, mean temperature effectively reduces the temperature under the polymer lithium ion power cell high-specific-power heavy-current discharge operating mode less than 51 ℃.Cycle life improves more than 42%, the service behaviour platform of Effective Raise battery high-multiplying power discharge.
The assembly technology that out connector in the utility model forms is simple, adopts the sandwich construction can Effective Raise battery assembly technology standardization level, and all parts are realized standardization manufacturings, because welding assembly work power is 5 times of former technique.
Can realize the multichannel fuction output according to Multilayer pole ear sheet metal number in the utility model.
Description of drawings
Fig. 1 is that the pole piece composition of traditional polymer lithium ion battery consists of schematic diagram;
Fig. 2 is the monolithic battery pole piece schematic diagram of traditional polymer lithium ion battery;
Fig. 3 is the battery pole piece group schematic diagram of traditional polymer lithium ion battery;
Fig. 4 is in groups pressing shaping and conductive metal sheet formation schematic diagram of traditional polymer lithium ion battery;
Fig. 5 is in groups positive and negative lug conductive metal sheet complete structure schematic diagram of traditional polymer lithium ion battery;
Fig. 6 is schematic diagram after the traditional polymer lithium ion battery plastic-aluminum packing;
Fig. 7 is the utility model preferred embodiment heat seal mode schematic diagram;
Fig. 8 is the utility model preferred embodiment injection moulding mode schematic diagram;
Fig. 9 is that the utility model preferred embodiment is installed in pole piece connected mode structural representation in the battery;
Figure 10 is the completed cell schematic diagram that the utility model preferred embodiment is used.
Embodiment
In conjunction with Fig. 7 to Figure 10, preferred embodiment is described in further details to the utility model.
A kind of high-specific-power poly-lithium battery multilayer both positive and negative polarity lug out connector comprises macromolecular material insulating trip 1 and a plurality of lug sheet metal 2.Macromolecular material insulating trip 1 in the present embodiment adopts the poly (propylene carbonate) macromolecule resin material, and macromolecular material insulating trip 1 is separated by lug sheet metal 2 and is solidify to form out connector 3 integral body.
Out connector 3 can adopt two kinds of technology modes to make, one, as shown in Figure 7, macromolecular material insulating trip 1 is to comprise multilayer lamellar body 11, each lamellar body 11 is spaced apart with lug sheet metal 2, then insert fixing tool, the synthetic processing mode of hot pressing is finished and is inserted fixing tool, and hot pressing becomes an out connector 3 overall structures.
Its two, as shown in Figure 8, after lug sheet metal 2 was equidistantly arranged, macromolecular material formed the overall structure of out connector 3 in the injection mo(u)lding of shaper mesohigh.
Above-mentioned dual mode both positive and negative polarity all is suitable for, and all need not the mechanical connection reinforcing and weld to solve the interface in conjunction with problem, and wherein macromolecular material insulating trip THICKNESS CONTROL is between 0.01-0.6mm.
Wherein, in the present embodiment, lug sheet metal 2 comprises positive pole ear sheet metal and negative lug sheet metal, both adopt different metal material, wherein the positive pole ear sheet metal is the raffinal sheet metal, the negative lug sheet metal is high-purity copper or nickel sheet metal, and both THICKNESS CONTROL are 0.1-0.5mm.Positive pole ear sheet metal and negative lug sheet metal can be one deck structures, also can make sandwich construction.During multilayer, the thickness of each anodal raffinal sheet metal or negative pole high-purity copper or nickel sheet metal is between 0.005-0.5mm.
In addition, described lug sheet metal 2 surfaces all have the thickness of 0.008-0.010mm to get silver coating.Whole out connector 3 whole gross thickness are controlled to be between the 0.5-4mm.
After the utility model is assembled to inside battery, its structure as shown in Figure 9, a plurality of battery pole pieces 4 are divided into some groups, battery pole ear 5 pressing shapings in same group, drawn by lug sheet metal 2 after clamping, a plurality of groups just with the form of Multilayer pole ear sheet metal 2, then are fixed into an integral body by macromolecular material insulation board 1.Power brick is honored as a queen overall structure as shown in figure 10.
The utility model is compared with traditional handicraft, effectively reduce internal resistance 30%, pole piece consistency matching rate improves 85% in the battery, and the temperature rise of battery plus-negative plate end cell lowers 15%, battery and battery pack are worked under height output specific power large current load 15-20C multiplying power technical conditions, and output capacity improves 36%.The battery polarization phenomenon reduces greatly, and the thermal effect accumulation rate reduces by 23% than original.As after the series connection of the special-shaped battery core of 20AH capacity, maximum temperature (last 20 seconds) is 72 ℃ in 2 minutes 45 seconds (cut-ff voltage 2.9V) situations of 20C multiplying power discharging, and mean temperature effectively reduces the temperature of polymer lithium ion power cell group heavy-current discharge less than 53 ℃.Cycle life improves 43%, the service behaviour of Effective Raise battery pack high-multiplying power discharge.
The utility model assembly technology is simple, and all parts are realized the standardization manufacturing.Same out connector mechanism can realize the multichannel fuction output according to Multilayer pole ear sheet metal number, adopt both positive and negative polarity Multilayer pole ear out connector structure can the Effective Raise assembling and the thermal power of conductive current reduce.The utility model improves the safety and reliability of battery pack, elimination is transmitted the bad hidden danger that battery core is brought because of the heat that welding produces, significantly improve in the polarity effect of the condition of work battery of the high output of battery specific power heavy-current discharge and the accumulation of thermal effect, battery operated temperature on year-on-year basis traditional polymer lithium ion battery structure will descend 30%, output capacity improves 38%, the battery polarization effect reduces, and the thermal runaway platform improves temperature 80-95 degree.
Above-described embodiment only is used for explaining inventive concept of the present utility model, but not to the restriction of the utility model rights protection, allly utilizes this design that the utility model is carried out the change of unsubstantiality, all should fall into protection range of the present utility model.
Claims (9)
1. a high-specific-power poly-lithium battery multilayer both positive and negative polarity lug out connector is characterized in that: comprise macromolecular material insulating trip and a plurality of lug sheet metal; The macromolecular material insulating trip is separated by the lug sheet metal and is solidified into out connector integral body.
2. a kind of high-specific-power poly-lithium battery multilayer both positive and negative polarity lug out connector as claimed in claim 1, it is characterized in that: described macromolecular material insulating trip is PPC insulated with material sheet.
3. a kind of high-specific-power poly-lithium battery multilayer both positive and negative polarity lug out connector as claimed in claim 1, it is characterized in that: described macromolecular material insulating trip comprises the multilayer lamellar body, each lamellar body and lug sheet metal are spaced apart, insert fixing tool, and hot pressing becomes an overall structure.
4. a kind of high-specific-power poly-lithium battery multilayer both positive and negative polarity lug out connector as claimed in claim 1, it is characterized in that: described macromolecular material insulating trip is an integral body, after the lug sheet metal was equidistantly arranged, macromolecular material formed the overall structure of out connector in the injection mo(u)lding of shaper mesohigh.
5. a kind of high-specific-power poly-lithium battery multilayer both positive and negative polarity lug out connector as claimed in claim 1, it is characterized in that: described lug sheet metal comprises positive pole ear sheet metal and negative lug sheet metal, the positive pole ear sheet metal is the raffinal sheet metal, the negative lug sheet metal is high-purity copper or nickel sheet metal, and both THICKNESS CONTROL are the 0.1-0.5 millimeter.
6. a kind of high-specific-power poly-lithium battery multilayer both positive and negative polarity lug out connector as claimed in claim 1 or 2, it is characterized in that: described macromolecular material insulating trip THICKNESS CONTROL is the 0.01-0.6 millimeter.
7. a kind of high-specific-power poly-lithium battery multilayer both positive and negative polarity lug out connector as claimed in claim 1 is characterized in that: the whole gross thickness of described out connector is controlled to be 0.5-4mm.
8. a kind of high-specific-power poly-lithium battery multilayer both positive and negative polarity lug out connector as claimed in claim 5, it is characterized in that: described positive pole ear sheet metal, formed by the anodal raffinal sheet metal stack of multilayer, described negative lug sheet metal, be comprised of multilayer high-purity copper or the stack of nickel sheet metal, the thickness of its anodal raffinal sheet metal or high-purity copper or nickel sheet metal is between 0.005-0.5mm.
9. a kind of high-specific-power poly-lithium battery multilayer both positive and negative polarity lug out connector as claimed in claim 1, it is characterized in that: described lug foil surfaces all has the thickness of 0.008-0.010 millimeter to get silver coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204010155U CN202758954U (en) | 2012-08-14 | 2012-08-14 | Pole ear output connector for multi-layer positive-negative pole of high ratio power poly-lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204010155U CN202758954U (en) | 2012-08-14 | 2012-08-14 | Pole ear output connector for multi-layer positive-negative pole of high ratio power poly-lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202758954U true CN202758954U (en) | 2013-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012204010155U Withdrawn - After Issue CN202758954U (en) | 2012-08-14 | 2012-08-14 | Pole ear output connector for multi-layer positive-negative pole of high ratio power poly-lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202758954U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102779970A (en) * | 2012-08-14 | 2012-11-14 | 厦门太和动力电源科技有限公司 | Pole ear output connector for multi-layer positive-negative pole of high ratio power poly-lithium battery |
| CN109273657A (en) * | 2018-08-21 | 2019-01-25 | 厦门纬达科技有限公司 | A kind of silver-plated tab of positive aluminium and its manufacture craft of flexible package lithium cell |
| KR20200092672A (en) * | 2019-01-25 | 2020-08-04 | 에스케이이노베이션 주식회사 | Secondary battery and a secondary battery module including the same |
-
2012
- 2012-08-14 CN CN2012204010155U patent/CN202758954U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102779970A (en) * | 2012-08-14 | 2012-11-14 | 厦门太和动力电源科技有限公司 | Pole ear output connector for multi-layer positive-negative pole of high ratio power poly-lithium battery |
| CN102779970B (en) * | 2012-08-14 | 2015-06-17 | 厦门太和动力电源科技有限公司 | Pole ear output connector for multi-layer positive-negative pole of high ratio power poly-lithium battery |
| CN109273657A (en) * | 2018-08-21 | 2019-01-25 | 厦门纬达科技有限公司 | A kind of silver-plated tab of positive aluminium and its manufacture craft of flexible package lithium cell |
| KR20200092672A (en) * | 2019-01-25 | 2020-08-04 | 에스케이이노베이션 주식회사 | Secondary battery and a secondary battery module including the same |
| KR102751361B1 (en) * | 2019-01-25 | 2025-01-06 | 에스케이온 주식회사 | Secondary battery and a secondary battery module including the same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130227 Effective date of abandoning: 20150617 |
|
| RGAV | Abandon patent right to avoid regrant |