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2007 Volume 23 Issue 0
2007, 23(0): 1-4
doi: 10.3866/PKU.WHXB2007Supp01
Abstract:
A new functional electrolyte was developed to improve the cycling performance of LiMn2O4 spinel at elevated temperatures. The so-called high-temperature electrolyte was formed by adding additive Li2CO3 into conventional LiPF6 electrolyte solutions. The Li2CO3 could greatly surpress the production of hydro fluoric acid in electrolyte solution even at elevated temperatures. With the increase of Li2CO3 ratio in electrolyte solution, the HF contents decreased. Electrochemical measurements of 6 Ah lithium-ion batteries with spinel LiMn2O4 as cathode material showed that additive Li2CO3 could greatly improve the elevated temperature (55 ℃) cycling performance of spinel LiMn2O4 lithium-ion batteries.
A new functional electrolyte was developed to improve the cycling performance of LiMn2O4 spinel at elevated temperatures. The so-called high-temperature electrolyte was formed by adding additive Li2CO3 into conventional LiPF6 electrolyte solutions. The Li2CO3 could greatly surpress the production of hydro fluoric acid in electrolyte solution even at elevated temperatures. With the increase of Li2CO3 ratio in electrolyte solution, the HF contents decreased. Electrochemical measurements of 6 Ah lithium-ion batteries with spinel LiMn2O4 as cathode material showed that additive Li2CO3 could greatly improve the elevated temperature (55 ℃) cycling performance of spinel LiMn2O4 lithium-ion batteries.
2007, 23(0): 5-9
doi: 10.3866/PKU.WHXB2007Supp02
Abstract:
A novel Li4Ti5O12/LiPF6/EC+EMC+DMC (1:1:1 mass ratio)/LiMn2O4 lithium battery of 18650 type was developed and the electrochemical performance of the system was investigated through constant current charge-discharge test and differential chronopotential method, the abuse tolerances of overcharge and overheat were tested as well. The results showed that the cell using this system owns 60 Wh·kg-1 specific energy and 150 Wh·L-1 power density, 95%of initial capacity retained after 100%DOD (depth of discharge)1000 cycles at 1C(1C=1000 mA) rate and more than 250 cycle life at 60 益 which indicates excellent cycle performance in both room and high temperatures. The abuse tests showed that the systemalso had od safety performance.
A novel Li4Ti5O12/LiPF6/EC+EMC+DMC (1:1:1 mass ratio)/LiMn2O4 lithium battery of 18650 type was developed and the electrochemical performance of the system was investigated through constant current charge-discharge test and differential chronopotential method, the abuse tolerances of overcharge and overheat were tested as well. The results showed that the cell using this system owns 60 Wh·kg-1 specific energy and 150 Wh·L-1 power density, 95%of initial capacity retained after 100%DOD (depth of discharge)1000 cycles at 1C(1C=1000 mA) rate and more than 250 cycle life at 60 益 which indicates excellent cycle performance in both room and high temperatures. The abuse tests showed that the systemalso had od safety performance.
2007, 23(0): 10-13
doi: 10.3866/PKU.WHXB2007Supp03
Abstract:
The discharge capacity and the cycle lifetime of Li-Mn-O spinel oxide with different technology factors were analyzed by chemical pattern recognition method, and some criteria for improving material properties were obtained. The ratio of lithium to manganese was the primary influencing factor on discharge capacities and cycle lifetime for Li-Mn-O spinel oxide. Additive was the secondary influencing factor. Synthesis temperature and time
impacted the properties slightly.
The discharge capacity and the cycle lifetime of Li-Mn-O spinel oxide with different technology factors were analyzed by chemical pattern recognition method, and some criteria for improving material properties were obtained. The ratio of lithium to manganese was the primary influencing factor on discharge capacities and cycle lifetime for Li-Mn-O spinel oxide. Additive was the secondary influencing factor. Synthesis temperature and time
impacted the properties slightly.
2007, 23(0): 14-17
doi: 10.3866/PKU.WHXB2007Supp04
Abstract:
The spinel LiMn2O4 was synthesized by high temperature solid-state reaction and its structure and morphology were analyzed by XRD and SEM. A 2.5 Ah cylindrical lithium-ion battery was developed using electrodes made with water-soluble polymer binder, and its electrochemical performance was tested as well. The results showed that the synthesized LiMn2O4 material has simple spinel phase. The cell with water-binder LiMn2O4 electrode showed excellent electrochemical performance. The cathode’s specific capacity reached 95.8 mAh·g-1 at 0.5C (1C=2.5A) rate and the average discharge voltage of the cell was 3.85 V at 1C rate. The cells also have od safety performances during overcharging.
The spinel LiMn2O4 was synthesized by high temperature solid-state reaction and its structure and morphology were analyzed by XRD and SEM. A 2.5 Ah cylindrical lithium-ion battery was developed using electrodes made with water-soluble polymer binder, and its electrochemical performance was tested as well. The results showed that the synthesized LiMn2O4 material has simple spinel phase. The cell with water-binder LiMn2O4 electrode showed excellent electrochemical performance. The cathode’s specific capacity reached 95.8 mAh·g-1 at 0.5C (1C=2.5A) rate and the average discharge voltage of the cell was 3.85 V at 1C rate. The cells also have od safety performances during overcharging.
2007, 23(0): 18-20
doi: 10.3866/PKU.WHXB2007Supp05
Abstract:
A novel gel interpenetrating polymer network (IPN) was formed by using PVDF-HFP (poly(vinylidene fluoride)-co-hexafluoropropylene), TEGDA (tetra(ethylene glycol) diacrylate), BPO (benzoyl peroxide) and liquid electrolyte (1 mol·L-1 LiPF6, EC:DEC:EMC=1:1:1). Gel polymer lithium ion batteries were assembled based on the IPN polymer electrolyte. The batteries had od performances in high-current discharge, temperature reliable test and charge-discharge cycling.
A novel gel interpenetrating polymer network (IPN) was formed by using PVDF-HFP (poly(vinylidene fluoride)-co-hexafluoropropylene), TEGDA (tetra(ethylene glycol) diacrylate), BPO (benzoyl peroxide) and liquid electrolyte (1 mol·L-1 LiPF6, EC:DEC:EMC=1:1:1). Gel polymer lithium ion batteries were assembled based on the IPN polymer electrolyte. The batteries had od performances in high-current discharge, temperature reliable test and charge-discharge cycling.
2007, 23(0): 21-25
doi: 10.3866/PKU.WHXB2007Supp06
Abstract:
60 Ah Lithium ion battery was prepared by using of spinel LiMn2O4, and 60 Ah 288 V portable power system were developed. The electrochemical performance and power characteristic of 60Ah288V power system were further studied. The home-used electric vehicles were prepared with such power system. Both the performance of battery and electric vehicle were tested and had t satisfying results.
60 Ah Lithium ion battery was prepared by using of spinel LiMn2O4, and 60 Ah 288 V portable power system were developed. The electrochemical performance and power characteristic of 60Ah288V power system were further studied. The home-used electric vehicles were prepared with such power system. Both the performance of battery and electric vehicle were tested and had t satisfying results.
2007, 23(0): 26-30
doi: 10.3866/PKU.WHXB2007Supp07
Abstract:
The synthesis reaction mechanisms were analyzed for the cathode materials LiNixMn2-xO4, which were synthesized by the solid-state reaction method and the wet-chemical method, respectively. XRD data indicated that a mixture precursor of Ni1Mn2O4 and Mn2O3 would be preferred for a solid solution of Ni3/4Mn1/4Mn2O4 when the solid-state reaction method was used for the material synthesis. As a result, the last product would be the mixture of NiO, LixNi1-xO and spinel LiNixMn2-xO4 (0<x<0.5) and naturally the electro-chemical performance was poor. The cathode material LiNixMn2-xO4 with excellent cycle performance was synthesized by the wet-chemical method. The first discharge capacity was 116 mAh·g-1 and the capacity after 200 cycles retains 105 mAh·g-1 on the discharge rate of 1.5C. Yet the capacity of the 4.7 V potential needs for further improvement.
The synthesis reaction mechanisms were analyzed for the cathode materials LiNixMn2-xO4, which were synthesized by the solid-state reaction method and the wet-chemical method, respectively. XRD data indicated that a mixture precursor of Ni1Mn2O4 and Mn2O3 would be preferred for a solid solution of Ni3/4Mn1/4Mn2O4 when the solid-state reaction method was used for the material synthesis. As a result, the last product would be the mixture of NiO, LixNi1-xO and spinel LiNixMn2-xO4 (0<x<0.5) and naturally the electro-chemical performance was poor. The cathode material LiNixMn2-xO4 with excellent cycle performance was synthesized by the wet-chemical method. The first discharge capacity was 116 mAh·g-1 and the capacity after 200 cycles retains 105 mAh·g-1 on the discharge rate of 1.5C. Yet the capacity of the 4.7 V potential needs for further improvement.
2007, 23(0): 31-35
doi: 10.3866/PKU.WHXB2007Supp08
Abstract:
The product LiMn1.5Ni0.5-xCuxO4 with cubic spinel structure was synthesized by a chemical co-precipication method. MnSO4·H2O, NiSO4·6H2O, CuCl2·2H2O, NaOH, NH3·H2O and LiOH·H2O were used as the initial materials. The LiMn1.5Ni0.5-xCuxO4 powder was characterized by X-ray diffraction, scanning electron microscopy, tap density testing and electrochemical testing. The LiMn1.5Ni0.5-xCuxO4 material synthesized by two-stage process delivers a discharge capacity of 129.4 mAh·g-1 and 127.1 mAh·g-1 in the range of 3.0-5.0 V at the discharge current density of 0.50 mA·cm-2 and 2.00 mA·cm-2 individually. The material synthesized by three-stage process has a perfect cycle performance. Its discharge capacity can retain more than 98% of the initial capacity after 50 cycles between 3.0 and 5.0 V. Tap density of the material synthesized by three-stage process reaches 2.1 g·cm-3. In addition, the cycle performance of material synthesized was discussed with graphite as the anode. The average numerical decrement of discharge capacity is 1.7‰ after 200 cycles at the discharge current density of 2.00 mA·cm-2.
The product LiMn1.5Ni0.5-xCuxO4 with cubic spinel structure was synthesized by a chemical co-precipication method. MnSO4·H2O, NiSO4·6H2O, CuCl2·2H2O, NaOH, NH3·H2O and LiOH·H2O were used as the initial materials. The LiMn1.5Ni0.5-xCuxO4 powder was characterized by X-ray diffraction, scanning electron microscopy, tap density testing and electrochemical testing. The LiMn1.5Ni0.5-xCuxO4 material synthesized by two-stage process delivers a discharge capacity of 129.4 mAh·g-1 and 127.1 mAh·g-1 in the range of 3.0-5.0 V at the discharge current density of 0.50 mA·cm-2 and 2.00 mA·cm-2 individually. The material synthesized by three-stage process has a perfect cycle performance. Its discharge capacity can retain more than 98% of the initial capacity after 50 cycles between 3.0 and 5.0 V. Tap density of the material synthesized by three-stage process reaches 2.1 g·cm-3. In addition, the cycle performance of material synthesized was discussed with graphite as the anode. The average numerical decrement of discharge capacity is 1.7‰ after 200 cycles at the discharge current density of 2.00 mA·cm-2.
2007, 23(0): 36-39
doi: 10.3866/PKU.WHXB2007Supp09
Abstract:
The physical character of LiMn2O4 sample was investigated through XRD and SEM, then the best voltage scale of spinel LiMn2O4 power batteries was investigated, and the effect of abuse condition, such as overcharge (above 5.0 V) and overdischarge (below 1.5 V), on the electrochemical performance of lithium-ion batteries was researched. The results show that when it charge/discharge at 3.0-4.2 V, the cyclic performance of lithium-ion batteries based on spinel LiMn2O4 is better, and the life is longer. When it was overcharged to 5.0 V, the battery still can charge and discharge normally, but the cyclic performance becomes weak. When it was overcharged to 5.5 V, it can not been charged normally, the battery was useless. When it was discontinuously overdischarge to 1.5 V and continuously overdischarge to 2.0 V, the effect on cyclic performance of battery is slight, but when it was overdischarged to 1.0 V, the battery doesn’t work normally.
The physical character of LiMn2O4 sample was investigated through XRD and SEM, then the best voltage scale of spinel LiMn2O4 power batteries was investigated, and the effect of abuse condition, such as overcharge (above 5.0 V) and overdischarge (below 1.5 V), on the electrochemical performance of lithium-ion batteries was researched. The results show that when it charge/discharge at 3.0-4.2 V, the cyclic performance of lithium-ion batteries based on spinel LiMn2O4 is better, and the life is longer. When it was overcharged to 5.0 V, the battery still can charge and discharge normally, but the cyclic performance becomes weak. When it was overcharged to 5.5 V, it can not been charged normally, the battery was useless. When it was discontinuously overdischarge to 1.5 V and continuously overdischarge to 2.0 V, the effect on cyclic performance of battery is slight, but when it was overdischarged to 1.0 V, the battery doesn’t work normally.
2007, 23(0): 40-45
doi: 10.3866/PKU.WHXB2007Supp10
Abstract:
LiNi0.8Co0.2-xMgxO2 (x=0.02, 0.03, 0.04) cathode materials were synthesized by co-precipitation method. The materials were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), thermogravimetry (TG), and differential scanning calorimetry (DSC). The results showed that the spherical products, without impurities, had a typical α-NaFeO2 layered structure. In the range of 3.0-4.3 V, at 0.5 mA·cm-2 of the current density, the first specific capacity was 184.8 mAh·g-1. After 50 cycles, the capacity retention was 94.2%. The DSC result showed that after the doping with Mg2+, the phase transition of LiNi0.8Co0.2-xMgxO2 was inhibited without distinct capacity fall. At the same time, the stability and cycling character was improved obviously.
LiNi0.8Co0.2-xMgxO2 (x=0.02, 0.03, 0.04) cathode materials were synthesized by co-precipitation method. The materials were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), thermogravimetry (TG), and differential scanning calorimetry (DSC). The results showed that the spherical products, without impurities, had a typical α-NaFeO2 layered structure. In the range of 3.0-4.3 V, at 0.5 mA·cm-2 of the current density, the first specific capacity was 184.8 mAh·g-1. After 50 cycles, the capacity retention was 94.2%. The DSC result showed that after the doping with Mg2+, the phase transition of LiNi0.8Co0.2-xMgxO2 was inhibited without distinct capacity fall. At the same time, the stability and cycling character was improved obviously.
2007, 23(0): 46-50
doi: 10.3866/PKU.WHXB2007Supp11
Abstract:
18650 type Li ion secondary cells were developed using carbon as anode material and LiNi1/3Co1/3·Mn1/3O2 as cathode material. The discharge performance of the C/LiNi1/3Co1/3Mn1/3O2 cell was studied through such methods as charge and discharge cycle, hybrid pulse power characterization (HPPC) and area-specific impedance (ASI) test. Study was also performed on the impact of such factors as material particle and morphology, discharge temperature and electrolyte on the discharge performances of the C/LiNi1/3Co1/3Mn1/3O2 cell, especially on its discharge performance under big currents. The results show that the C/LiNi1/3Co1/3Mn1/3O2 cell presents more stable charge/discharge cycles as well as better discharge performance under big currents with smaller original particle of LiNi1/3Co1/3·Mn1/3O2. It is also demonstrated that elevated discharge temperature prominently improves the discharge performance of the C/LiNi1/3Co1/3Mn1/3O2 cell, with its output power density at late discharge period growing by a large margin. Electrolyte with high conductivity also improves the cell’s long-termcycle performance under big discharge currents.
18650 type Li ion secondary cells were developed using carbon as anode material and LiNi1/3Co1/3·Mn1/3O2 as cathode material. The discharge performance of the C/LiNi1/3Co1/3Mn1/3O2 cell was studied through such methods as charge and discharge cycle, hybrid pulse power characterization (HPPC) and area-specific impedance (ASI) test. Study was also performed on the impact of such factors as material particle and morphology, discharge temperature and electrolyte on the discharge performances of the C/LiNi1/3Co1/3Mn1/3O2 cell, especially on its discharge performance under big currents. The results show that the C/LiNi1/3Co1/3Mn1/3O2 cell presents more stable charge/discharge cycles as well as better discharge performance under big currents with smaller original particle of LiNi1/3Co1/3·Mn1/3O2. It is also demonstrated that elevated discharge temperature prominently improves the discharge performance of the C/LiNi1/3Co1/3Mn1/3O2 cell, with its output power density at late discharge period growing by a large margin. Electrolyte with high conductivity also improves the cell’s long-termcycle performance under big discharge currents.
2007, 23(0): 51-55
doi: 10.3866/PKU.WHXB2007Supp12
Abstract:
High electrocatalytic activity of an electropolymerized film of poly (3,4-ethylenedioxythiophene) (PEDOT) was reported toward the redox reaction of 2,5-dimercapto-1,3,4-thiadiazole (DMcT) as a promising cathode material for the lithium ion battery. Electrochemical performance of DMcT was improved by adding an appropriate quantity of PEDOT. Cyclic voltammetry showed improved electrochemical performance of DMcT on PEDOT-coated Pt electrode, indicating accelerated redox kinetics. Moreover, charge-discharge tests exhibited higher discharge capacity and slower capacity fading of the PEDOT-doped DMcT composite cathode compared with pure DMcT.
High electrocatalytic activity of an electropolymerized film of poly (3,4-ethylenedioxythiophene) (PEDOT) was reported toward the redox reaction of 2,5-dimercapto-1,3,4-thiadiazole (DMcT) as a promising cathode material for the lithium ion battery. Electrochemical performance of DMcT was improved by adding an appropriate quantity of PEDOT. Cyclic voltammetry showed improved electrochemical performance of DMcT on PEDOT-coated Pt electrode, indicating accelerated redox kinetics. Moreover, charge-discharge tests exhibited higher discharge capacity and slower capacity fading of the PEDOT-doped DMcT composite cathode compared with pure DMcT.
2007, 23(0): 56-59
doi: 10.3866/PKU.WHXB2007Supp13
Abstract:
LiCoO2 and nonstoichiometric Li1+xCoO2(x=0.02, 0.05) cathode materials were synthesized under various nLi/nCo ratio. X-rayDiffraction (XRD), scanning electronic microscope (SEM), inductively coupled plasma-atomic emission spectrometry (ICP-AES), laser particle size distribution, BET and electrochemical analysis were used to characterize the materials. The results showed that excess Li2CO3 added could smooth particles’surface, enlarge particles’size, reduce particles’ specific surface area and increase materials’density. The results of electrochemical analysis also indicated that excess Li in LiCoO2 could suppress the disadvantageous crystal phase change, stabilize materials’ structure and decrease the average loss ratio to 1.3‰ from 1.9‰ during 50 cycles.
LiCoO2 and nonstoichiometric Li1+xCoO2(x=0.02, 0.05) cathode materials were synthesized under various nLi/nCo ratio. X-rayDiffraction (XRD), scanning electronic microscope (SEM), inductively coupled plasma-atomic emission spectrometry (ICP-AES), laser particle size distribution, BET and electrochemical analysis were used to characterize the materials. The results showed that excess Li2CO3 added could smooth particles’surface, enlarge particles’size, reduce particles’ specific surface area and increase materials’density. The results of electrochemical analysis also indicated that excess Li in LiCoO2 could suppress the disadvantageous crystal phase change, stabilize materials’ structure and decrease the average loss ratio to 1.3‰ from 1.9‰ during 50 cycles.
2007, 23(0): 60-66
doi: 10.3866/PKU.WHXB2007Supp14
Abstract:
With the application of spinel LiMn2O4 cathode material and new seperator, a 60 Ah LiMn2O4-based lithium ion battery for plug-in hybrid electric vehicles (PHEV) was developed on the basis of studying the influence of electrode fabrication technology and electrolyte on the rate charge-discharge and cycling performance. Battery electrochemical performances were studied, including rate charge-discharge, cycling and storage. Lithium ion battery module (88 cells in series) for PHEV was also prepared. The rate discharge, 10 s. pulse power, 30 s. pulse power and fast charge performances for the module have been evaluated. The results indicated that the 60 Ah LiMn2O4 lithium ion battery has excellent performance on rate discharge, fast charge, cycle life and storage, it is a promising battery of PHEV applications.
With the application of spinel LiMn2O4 cathode material and new seperator, a 60 Ah LiMn2O4-based lithium ion battery for plug-in hybrid electric vehicles (PHEV) was developed on the basis of studying the influence of electrode fabrication technology and electrolyte on the rate charge-discharge and cycling performance. Battery electrochemical performances were studied, including rate charge-discharge, cycling and storage. Lithium ion battery module (88 cells in series) for PHEV was also prepared. The rate discharge, 10 s. pulse power, 30 s. pulse power and fast charge performances for the module have been evaluated. The results indicated that the 60 Ah LiMn2O4 lithium ion battery has excellent performance on rate discharge, fast charge, cycle life and storage, it is a promising battery of PHEV applications.
2007, 23(0): 67-74
doi: 10.3866/PKU.WHXB2007Supp15
Abstract:
Electrospinning is a powerful and versatile method to fabricate nanofibers and electrospun membranes. The principle, devices, mechanism and developments of electrospinning were systematically introduced in this paper. The techniques of electrospinning, the factors which affect the properties of electrospun nano-materials, the preparation and applications of electrospun membranes were discussed in details. As a highlighted part, the application of electrospun membrane used as lithium-ion battery separator and the remarkable achievement of multi-spinneret Electrospinning were also presented.
Electrospinning is a powerful and versatile method to fabricate nanofibers and electrospun membranes. The principle, devices, mechanism and developments of electrospinning were systematically introduced in this paper. The techniques of electrospinning, the factors which affect the properties of electrospun nano-materials, the preparation and applications of electrospun membranes were discussed in details. As a highlighted part, the application of electrospun membrane used as lithium-ion battery separator and the remarkable achievement of multi-spinneret Electrospinning were also presented.
2007, 23(0): 75-79
doi: 10.3866/PKU.WHXB2007Supp16
Abstract:
Along with the improvement and development of lithium-ion battery materials and technology, there has seen great improvement in the high power performance of lithium-ion battery, which makes it possible to be widely used for such applications as power tools and hybrid electric vehicles (HEVs). However, it remains to be enhanced as for the safety performance, cost and calendar life of high power lithium-ion battery. The article provides a comprehensive overview of recent development of key materials, research status and application prospect of high power lithium-ion battery in China and the world. Perspective on the future research direction is also provided.
Along with the improvement and development of lithium-ion battery materials and technology, there has seen great improvement in the high power performance of lithium-ion battery, which makes it possible to be widely used for such applications as power tools and hybrid electric vehicles (HEVs). However, it remains to be enhanced as for the safety performance, cost and calendar life of high power lithium-ion battery. The article provides a comprehensive overview of recent development of key materials, research status and application prospect of high power lithium-ion battery in China and the world. Perspective on the future research direction is also provided.
2007, 23(0): 80-89
doi: 10.3866/PKU.WHXB2007Supp17
Abstract:
Electrolyte solution plays a great importance on the performances of lithium-ion batteries, such as cyclability, safety, etc. The article reviews the recent research progress related to electrolyte solutions in thermal stability of solution, reactions on SEI film, high-temperature solutions and overcharge protection solutions, and some research methods. The paper also involves the factors that determine the quality of electrolyte solutions in solution preparation.
Electrolyte solution plays a great importance on the performances of lithium-ion batteries, such as cyclability, safety, etc. The article reviews the recent research progress related to electrolyte solutions in thermal stability of solution, reactions on SEI film, high-temperature solutions and overcharge protection solutions, and some research methods. The paper also involves the factors that determine the quality of electrolyte solutions in solution preparation.
2007, 23(0): 90-93
doi: 10.3866/PKU.WHXB2007Supp18
Abstract:
The research progress in the preparation methods of the separators for lithium-ion secondary batteries was summarized. The preparation methods, structure and performance of the micro pores polymer separators for Li-ion batteries were introduced. Its effect on the performance of the battery was also presented.
The research progress in the preparation methods of the separators for lithium-ion secondary batteries was summarized. The preparation methods, structure and performance of the micro pores polymer separators for Li-ion batteries were introduced. Its effect on the performance of the battery was also presented.
2007, 23(0): 94-99
doi: 10.3866/PKU.WHXB2007Supp19
Abstract:
At present, the applications of motive batteries in EV are extensively used, because of complicate circumstance the consistency of Li-ion batteries are severely descented. If it is not used for quality evaluation and maintenance measure, cycle life is badly decreased. It is basis of Li-ion batteriy’s property and scientific service and maintenance analysis of motive Li-ion batteries system, using data acquisition of motive Li-ion battery. It is important effect to improve quality of motive Li-ion batteries in service and property analysis, at the same time it is influence for performance of EV. In this paper, the development and applied fields of quality evaluation of motive Li-ion battery is introduced.
At present, the applications of motive batteries in EV are extensively used, because of complicate circumstance the consistency of Li-ion batteries are severely descented. If it is not used for quality evaluation and maintenance measure, cycle life is badly decreased. It is basis of Li-ion batteriy’s property and scientific service and maintenance analysis of motive Li-ion batteries system, using data acquisition of motive Li-ion battery. It is important effect to improve quality of motive Li-ion batteries in service and property analysis, at the same time it is influence for performance of EV. In this paper, the development and applied fields of quality evaluation of motive Li-ion battery is introduced.
2007, 23(0): 100-106
doi: 10.3866/PKU.WHXB2007Supp20
Abstract:
There are lots of researches, developments, and applications about high power lithiumion battery recently because of its market, especially the requirements of thickness, weight and safety. Regarding this, Aluminum bag lithium ion battery is highly adverted. Here, we are ing to introduce the developing and application of Al-bag Li-ion battery in high power field.
There are lots of researches, developments, and applications about high power lithiumion battery recently because of its market, especially the requirements of thickness, weight and safety. Regarding this, Aluminum bag lithium ion battery is highly adverted. Here, we are ing to introduce the developing and application of Al-bag Li-ion battery in high power field.
2007, 23(0): 107-112
doi: 10.3866/PKU.WHXB2007Supp21
Abstract:
This paper describe the phylogeny and actuality of electric vehicles (EV) as well as the battery and motor system of EV. The perspective of EV is forcasted in the end.
This paper describe the phylogeny and actuality of electric vehicles (EV) as well as the battery and motor system of EV. The perspective of EV is forcasted in the end.
2007, 23(0): 113-120
Abstract:
