CN101807719A - Manufacturing method of high power type lithium battery system - Google Patents
Manufacturing method of high power type lithium battery system Download PDFInfo
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- CN101807719A CN101807719A CN201010130929A CN201010130929A CN101807719A CN 101807719 A CN101807719 A CN 101807719A CN 201010130929 A CN201010130929 A CN 201010130929A CN 201010130929 A CN201010130929 A CN 201010130929A CN 101807719 A CN101807719 A CN 101807719A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention relates to a manufacturing method of a high power type lithium battery system, which is characterized by selecting proper material formulas of the positive electrode and the negative electrode of a lithium ion battery, winding an electronic core for 4-5 layers in the manufacturing process and selecting a diaphragm of 9-20mu m between the positive electrode and the negative electrode, 'I'-shaped aluminum sheets or aluminum alloys and 'U'-shaped aluminum sheets or aluminum alloys are used for tightly packing more than two single batteries in the single battery assembling process. The invention achieves the purposes of further improving the conductivity of the battery and reducing the internal resistance, thereby reducing the generation of the heat of the lithium ion battery under the same conditions, basically lowering the temperature of the battery in large-current working process, and ensuring that the system of the invention works safely, reliably and efficiently under the condition of high-rate discharge.
Description
Technical field
The present invention relates to the manufacture method of a kind of high power type lithium ion cell system, this method has significantly reduced the internal resistance of battery, has designed heat abstractor simultaneously in system, thereby has reached the high-multiplying power discharge purpose that makes whole system reliable and stable.
Background technology
Low capacity lithium battery major part is used in the accumulation energy type electronic products such as mobile phone, MP3 at present, perhaps be applied in the electric vehicle system by the design capacity that adds macrocell, along with the raising of technical matters level and widening of application, lithium ion battery also progressively is applied in the electric tool (as hay mover, electric drill, electronic toy etc.).Too fast even the normal heavy-current discharge of capacity attenuation when but existing battery system is applied to this high-power equipment of electric tool, this improves the performance of lithium battery heavy-current discharge with regard to an urgent demand.
Because the electric tool product requirement has higher operating current, is generally 5～10 multiplying powers (being 5C-10C) of rated capacity, so need some particular processing aspect battery design.And the present invention is mainly by reducing the internal resistance of battery, the many problems of heat production when fundamentally removing the lithium ion battery heavy-current discharge.In configuration aspects,, come to loose fast to remove it simultaneously so will do necessary heat abstractor because heavy-current discharge can produce more heat under the same conditions.
Summary of the invention
The objective of the invention is to overcome above-mentioned weak point provides the manufacture method of a kind of high power lithium battery system.
The objective of the invention is to be achieved through the following technical solutions: select suitable raw material material to carry out best proportioning; In electric core manufacturing process, adopt multilaminate coiledly, adopt thin barrier film simultaneously as far as possible; Finally the exploitation cooling system satisfies the requirement that the discharge of electric tool product high power is dispelled the heat in the package assembly design.
Below be further specifying to the foregoing invention scheme:
(A) negative material of lithium ion battery slurry is the power-type carbon dust: 75%～95%, conductive agent SP:0.5%～15%, conductive carbon fibre VGCF:0.5%～5%, sodium carboxymethylcellulose: 0.5%～5%, aqueous adhesive LA132:3.5%～10%, above negative material gross weight is 100%, and deionized water is 50%～65% of a carbon dust total weight;
(B) the anode material for lithium-ion batteries slurry is a LiMn2O4: 86%～89%, conductive agent SP:1.5～5%, conductive agent KS-15:0.5%～9%, conductive carbon fibre VGCF:1%～5%, binding agent PVDF (900): 2%～3.5%, above positive electrode gross weight is 100%, and solvent NMP accounts for 50%～65% of cell positive material total weight;
(C) adopt 4～5 layers of winding method in electric core manufacturing process, the barrier film between the both positive and negative polarity is selected 9～20 μ m (preferred 9～16 μ m, most preferably 9～15 μ m) for use;
(D) prepare cell after, in the cell assembling process with " I " font aluminium flake or aluminium alloy with " [" font aluminium flake or aluminium alloy closely wrap up two above cells, wherein " I " font aluminium flake is clipped between two monomer electricity cores, and " [" font aluminium flake or aluminium alloy wrap two monomers of outermost layer.Outermost layer can be aided with buckle and holding screw is fixed.
In the inventive method, the negative material of lithium ion battery is starched preferred power-type carbon dust: 80%～90%, conductive agent SP:3%～8%, conductive carbon fibre VGCF:1%～2%, sodium carboxymethylcellulose: 1%～3%, aqueous adhesive LA132:4%～8%, above negative material gross weight is 100%, deionized water is 50%～65% of a carbon dust total weight.
In the inventive method, the preferred LiMn2O4 of anode material for lithium-ion batteries slurry: 86%～89%, conductive agent SP:2～4%, conductive agent KS-15:1%～5%, conductive carbon fibre VGCF:1%～3%, binding agent PVDF (900): 2%～3%, above positive electrode gross weight is 100%, solvent NMP (N-methyl pyrrolidone) accounts for 52%～62% of cell positive material total weight.
It is dry that positive electrode is wanted, and can dry it before the batch mixing, afterwards positive and negative pole material evenly stirred respectively.In addition, the present invention selects for use the power-type carbon dust of specific kind and consumption to make final battery have electric conductivity preferably.The conductive agent KS-15 that the present invention adopts is the bulky grain graphite powder, and conductive carbon fibre VGCF is a vapor-grown carbon fibers, preferred 3-20 μ m.
The heat of battery pack inside can not in time dissipate when considering heavy-current discharge, can produce a series of adverse influences to the performance of battery.So consider that in assembling process interpolation " I " font aluminium flake is with " [" font aluminium flake closely wraps up battery, wherein " I " font aluminium flake is clipped between two monomer electricity cores, " [" font aluminium flake wraps two monomers of outermost layer, with adhesive tape or fixation with steel wire electricity core and aluminium flake, guarantee good contact.So inner aluminium flake in time conducts out with heat, and by outside aluminium flake it is dissipated rapidly, and the internal-external temperature difference of battery system is better controlled, and has avoided the gathering of heat at inside battery, thereby reaches the purpose of high efficiency and heat radiation.Material of the present invention is all commercially available to be got.
Beneficial effect of the present invention compared with the prior art: prior art is by modifying particle surface to increase interparticle conductive capability usually, in the battery prescription of the present invention through a large amount of experiment screenings, adopt a certain amount of conductive carbon fibre VGCF, make electronics directly pass from the inside of the loose structure of material itself, significantly improve electric conductivity, overcome in the prior art the too fast even normal heavy-current discharge of heavy-current discharge capacity attenuation, the making exploitation of high-power battery has been produced bigger facilitation.
In electric core manufacturing process, adopt 4～5 layers of winding method, abandon the individual layer winding method of common processes, pole piece is shortened significantly, increase the water conservancy diversion effect, barrier film between the both positive and negative polarity is selected 9～20 μ m for use simultaneously, and is thin than energy type battery 30～40 μ m barrier films, the impedance that has reduced battery by a relatively large margin, make the inside battery ionic conduction path shorter, conduction velocity is bigger.
Interpolation " I " font aluminium flake is with " [" font aluminium flake closely wraps up battery, and the heat of battery pack inside can not in time dissipate when having overcome heavy-current discharge, to the performance generation adverse influence of battery in the battery system assembling process.
Therefore, the present invention reaches the conductivity of further raising battery, reduce the purpose of internal resistance, thereby reduce the generation of lithium ion battery heat under the same conditions, temperature when fundamentally having reduced the big current work of battery, guaranteed that this system under the high-multiplying power discharge situation, works safe, reliable, efficiently.
Description of drawings
Fig. 1 is the assembling aerial view of battery system of the present invention.
Among the figure, 1 be " [" font aluminium flake or aluminium alloy, 2 is " I " font aluminium flake or aluminium alloy, 3 is cell.
Embodiment
Below the present invention is described in detail:
The power-type carbon dust: sea, Changsha flourish electronics new material limited company produces; Conductive agent SP: industrial chemical Co., Ltd of Shanghai Hewlett-Packard produces; Electric conduction of carbon fiber material VGCF: industrial chemical Co., Ltd of Shanghai Hewlett-Packard produces; Thickener CMC: Yue Peng Fine Chemical Co., Ltd in Guangdong produces; Aqueous adhesive LA132: industrial chemical Co., Ltd of Shanghai Hewlett-Packard produces; Lithium manganate material: Jiangsu Front New Energy Co., Ltd produces; Conductive agent KS-15: industrial chemical Co., Ltd of Shanghai Hewlett-Packard produces; Binding agent PVDF (Kynoar) 900: Chengdu Yindile Power Source Science and Technology Co., Ltd produces; Diaphragm paper: Changxing bamboo circle lithium battery material Co., Ltd produces.
Embodiment 1
The making of positive and negative pole material
Negative material: the power-type carbon dust accounts for 90% of total weight, and conductive agent SP is 2%, and electric conduction of carbon fiber material VGCF is 1.2%, and thickener CMC is 1.8%, and aqueous adhesive LA132 is 5%.Deionized water is about 50% of carbon dust total weight.
Positive electrode: lithium manganate material accounts for 89% of total weight, and conductive agent SP is 3.5%, and conductive agent KS-15 is 3.5%, and electric conduction of carbon fiber material VGCF is 1%, and binding agent PVDF (900) is 3%, and solvent NMP accounts for 52% of positive electrode total weight.
With the positive electrode oven dry, afterwards positive and negative pole material is evenly stirred respectively.
Make flow process: batching → coating → baking → film-making → spot welding → coiling → one envelope → fluid injection → change into → two envelopes → aging → partial volume → PACK
Wherein, adopt 4～5 layers of winding method in the winding process in electric core is made, the barrier film between the both positive and negative polarity is selected 15 μ m for use;
Between adjacent two batteries, add thermal conductivity such as aluminium flake or aluminium alloy material preferably during the cell assembling, remove the effect of inside battery heat to reach to loose faster.Other steps all get final product according to the conventional manufacture craft in this area.
As shown in Figure 1, " [" font aluminium flake is separated, and outermost layer is aided with buckle and holding screw is fixed again 10 lithium ion single batteries to be added 2 with 9 " I " font aluminium flakes.
Common 36V6AH battery pack, temperature inside when using thermosensitive resistance measurement battery operated, maximum temperature is 72 ℃.
Same battery group of the present invention, temperature inside when using thermosensitive resistance measurement battery operated, maximum temperature is 48 ℃.
Common 36V6AH battery pack and same battery group of the present invention are carried out 25A discharge cycles test with the loop test instrument, after the common batteries group circulation as a result 100 times capacity attenuation to 5AH, and battery pack of the present invention to be circulated to 150 capacity be 5.4AH.
The making of positive and negative pole material
Negative material: the power-type carbon dust accounts for 86% of total weight, and conductive agent SP is 4%, and electric conduction of carbon fiber material VGCF is 1.5%, and thickener CMC is 3%, and aqueous adhesive LA132 is 5.5%.Deionized water is about 55% of carbon dust total weight.
Positive electrode: lithium manganate material accounts for 86% of total weight, and conductive agent SP is 4%, and conductive agent KS-15 is 5%, and electric conduction of carbon fiber material VGCF is about 3%, and binding agent PVDF (900) is 2%, and solvent NMP accounts for 58% of cell positive material total weight.
With the positive electrode oven dry, afterwards positive and negative pole material is evenly stirred respectively.
Make flow process: batching → coating → baking → film-making → spot welding → coiling → one envelope → fluid injection → change into → two envelopes → aging → partial volume → PACK
Wherein, adopt 4～5 layers of winding method in electric core manufacturing process, the barrier film between the both positive and negative polarity is selected 16 μ m for use;
Between adjacent two batteries, add thermal conductivity such as aluminium flake or aluminium alloy material preferably during the cell assembling, remove the effect of inside battery heat to reach to loose faster.Other steps all get final product according to the conventional manufacture craft in this area.
As shown in Figure 1, " [" font aluminium flake is separated, and outermost layer is aided with buckle and holding screw is fixed again 10 lithium ion single batteries to be added 2 with 9 " I " font aluminium flakes.
Common 36V6AH battery pack, temperature inside when using thermosensitive resistance measurement battery operated, maximum temperature is 72 ℃.
Same battery group of the present invention, temperature inside when using thermosensitive resistance measurement battery operated, maximum temperature is 48 ℃.
Common 36V6AH battery pack and same battery group of the present invention are carried out 25A discharge cycles test with the loop test instrument, after the common batteries group circulation as a result 100 times capacity attenuation to 5AH, and the battery pack of adding cooling system be circulated to 150 times after capacity be 5.5AH.
The making of positive and negative pole material
Negative material: the power-type carbon dust accounts for 81% of total weight, and conductive agent SP is 14.5%, and electric conduction of carbon fiber material VGCF is 0.5%, and thickener CMC is 0.5%, and aqueous adhesive LA132 is 3.5%.Deionized water is about 65% of carbon dust total weight
Positive electrode: lithium manganate material accounts for 88% of total weight, and conductive agent SP is 5%, and conductive agent KS-15 is 0.5%, and electric conduction of carbon fiber material VGCF is about 3%, and binding agent PVDF (900) is 3.5%.Solvent NMP accounts for 62% of positive electrode total weight.
With the positive electrode oven dry, afterwards positive and negative pole material is evenly stirred respectively.
Make flow process: batching → coating → baking → film-making → spot welding → coiling → one envelope → fluid injection → change into → two envelopes → aging → partial volume → PACK
Wherein, adopt 4～5 layers of winding method in electric core manufacturing process, the barrier film between the both positive and negative polarity is selected 9 μ m for use;
Between adjacent two batteries, add thermal conductivity such as aluminium flake or aluminium alloy material preferably during the cell assembling, remove the effect of inside battery heat to reach to loose faster.Other steps all get final product according to the conventional manufacture craft in this area.
As shown in Figure 1,10 lithium ion single batteries add 2 with 9 " I " font aluminium flakes " [" font aluminium flake are separated, and outermost layer is aided with buckle and holding screw is fixed.
Common 36V6AH battery pack, temperature inside when using thermosensitive resistance measurement battery operated, maximum temperature is 72 ℃.
Same battery group of the present invention, temperature inside when using thermosensitive resistance measurement battery operated, maximum temperature is 49 ℃.
Common 36V6AH battery pack and same battery group of the present invention are carried out 25A discharge cycles test with the loop test instrument, and capacity attenuation is to 5AH after the common batteries group circulation as a result 100 times, and battery pack of the present invention is circulated to capacity 5.5AH 150 times.
Embodiment 4
The making of positive and negative pole material
Negative material: the power-type carbon dust accounts for 92% of total weight, and conductive agent SP is 1%, and electric conduction of carbon fiber material VGCF is 3%, and thickener CMC is 0.5%, and aqueous adhesive LA132 is 3.5%, and deionized water is 60% of a carbon dust total weight.
Positive electrode: lithium manganate material accounts for 87% of total weight, and conductive agent SP is 1.5%, and conductive agent KS-15 is 7.5%, and electric conduction of carbon fiber material VGCF is 2%, and binding agent PVDF (900) is 2%, and solvent NMP accounts for 65% of positive electrode total weight.
With the positive electrode oven dry, afterwards positive and negative pole material is evenly stirred respectively.
Make flow process: batching → coating → baking → film-making → spot welding → coiling → one envelope → fluid injection → change into → two envelopes → aging → partial volume → PACK
Wherein, adopt 4～5 layers of winding method in electric core making (being spot welding and coiling) process, the barrier film between the both positive and negative polarity is selected 20 μ m for use;
Between adjacent two batteries, add thermal conductivity such as aluminium flake or aluminium alloy material preferably during the cell assembling, remove the effect of inside battery heat to reach to loose faster.Other steps all get final product according to the conventional manufacture craft in this area.
As shown in Figure 1, " [" font aluminium flake is separated, and outermost layer is aided with buckle and holding screw is fixed again 10 lithium ion single batteries to be added 2 with 9 " I " font aluminium flakes.
Common 36V6AH battery pack, temperature inside when using thermosensitive resistance measurement battery operated, maximum temperature is 72 ℃.
Same battery group of the present invention, temperature inside when using the thermistor resistance measurement battery operated, maximum temperature is 50 ℃.
Common 36V6AH battery pack and same battery group of the present invention are carried out 25A discharge cycles test with the loop test instrument, after the common batteries group circulation as a result 100 times capacity attenuation to 5AH, and battery pack of the present invention to be circulated to 150 capacity be 5.4AH.
Claims (4)
1. the manufacture method of a high power type lithium ion cell system is characterized in that in this method
(A) negative material of lithium ion battery slurry is the power-type carbon dust: 75%～95%, conductive agent SP:0.5%～15%, conductive carbon fibre VGCF:0.5%～5%, sodium carboxymethylcellulose: 0.5%～5%, aqueous adhesive LA132:3.5%～10%, above negative material gross weight is 100%, and deionized water is 50%～65% of a carbon dust total weight;
(B) the anode material for lithium-ion batteries slurry is a LiMn2O4: 86%～89%, conductive agent SP:1.5～5%, conductive agent KS-15:0.5%～9%, conductive carbon fibre VGCF:1%～5%, binding agent PVDF (900): 2%～3.5%, above positive electrode gross weight is 100%, and solvent NMP accounts for 50%～65% of cell positive material total weight;
(C) adopt 4～5 layers of winding method in electric core manufacturing process, the barrier film between the both positive and negative polarity is selected 9～20 μ m for use;
(D) prepare cell after, in the cell assembling process with " I " font aluminium flake or aluminium alloy with " [" font aluminium flake or aluminium alloy closely wrap up two above cells, wherein " I " font aluminium flake or aluminium alloy are clipped between two monomer electricity cores, and " [" font aluminium flake or aluminium alloy wrap two monomers of outermost layer.
2. the preparation method of high power type lithium ion cell according to claim 1 system, it is characterized in that in this method, the negative material slurry of lithium ion battery is the power-type carbon dust: 80%～90%, conductive agent SP:3%～8%, conductive carbon fibre VGCF:1%～2%, sodium carboxymethylcellulose: 1%～3%, aqueous adhesive LA132:4%～8%, above negative material gross weight is 100%, and deionized water is 50%～65% of a carbon dust total weight.
3. the preparation method of high power type lithium ion cell according to claim 1 system, it is characterized in that in this method, the anode material for lithium-ion batteries slurry is a LiMn2O4: 86%～89%, conductive agent SP:2～4%, conductive agent KS-15:1%～5%, conductive carbon fibre VGCF:1%～3%, binding agent PVDF (900): 2%～3%, above positive electrode gross weight is 100%, and solvent NMP accounts for 52%～62% of cell positive material total weight.
4. the preparation method of high power type lithium ion cell according to claim 1 system is characterized in that in this method that the barrier film between the both positive and negative polarity is selected 9～16 μ m for use.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102339995A (en) * | 2011-09-28 | 2012-02-01 | 江苏富朗特新能源有限公司 | Manufacturing method of large-current and long-life lithium battery |
| CN102751473A (en) * | 2012-07-10 | 2012-10-24 | 上海索锂科技有限公司 | Method for preparing high-capacity cathode slurry for automobile |
| CN104157834A (en) * | 2014-08-26 | 2014-11-19 | 四川理工学院 | Application of spiral nanometer carbon fiber as lithium ion battery cathode material and preparation method of battery cathode |
| CN106684333A (en) * | 2017-01-13 | 2017-05-17 | 天津中聚新能源科技有限公司 | Lithium ion battery anode pulp and preparation method thereof |
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| CN1411081A (en) * | 2002-11-15 | 2003-04-16 | 中信国安盟固利电源技术有限公司 | Flexible package liquid state lithium ion battery |
| JP2008243639A (en) * | 2007-03-28 | 2008-10-09 | Sanyo Electric Co Ltd | Battery pack with pressing holder |
| CN201289891Y (en) * | 2008-10-31 | 2009-08-12 | 天津力神电池股份有限公司 | Internal uniform radiating structure of square power lithium ion battery pole group |
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- 2010-03-23 CN CN201010130929A patent/CN101807719A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1411081A (en) * | 2002-11-15 | 2003-04-16 | 中信国安盟固利电源技术有限公司 | Flexible package liquid state lithium ion battery |
| JP2008243639A (en) * | 2007-03-28 | 2008-10-09 | Sanyo Electric Co Ltd | Battery pack with pressing holder |
| CN201289891Y (en) * | 2008-10-31 | 2009-08-12 | 天津力神电池股份有限公司 | Internal uniform radiating structure of square power lithium ion battery pole group |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102339995A (en) * | 2011-09-28 | 2012-02-01 | 江苏富朗特新能源有限公司 | Manufacturing method of large-current and long-life lithium battery |
| CN102751473A (en) * | 2012-07-10 | 2012-10-24 | 上海索锂科技有限公司 | Method for preparing high-capacity cathode slurry for automobile |
| CN102751473B (en) * | 2012-07-10 | 2015-07-01 | 上海索锂科技有限公司 | Method for preparing high-capacity cathode slurry for automobile |
| CN104157834A (en) * | 2014-08-26 | 2014-11-19 | 四川理工学院 | Application of spiral nanometer carbon fiber as lithium ion battery cathode material and preparation method of battery cathode |
| CN104157834B (en) * | 2014-08-26 | 2017-03-08 | 四川理工学院 | Spiral sodium rice carbon fiber is used as application and the GND preparation method of lithium ion battery negative material |
| CN106684333A (en) * | 2017-01-13 | 2017-05-17 | 天津中聚新能源科技有限公司 | Lithium ion battery anode pulp and preparation method thereof |
| CN106684333B (en) * | 2017-01-13 | 2019-12-13 | 天津中聚新能源科技有限公司 | Lithium ion battery cathode slurry and preparation method thereof |
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Open date: 20100818 |