lithium battery pack  in the 20th century developed a new high-energy batteries. This battery laptop battery is a lithium metal anode, cathode with MnO2, SOCL2, (CFx) n and so on. 70 years into practical use. Because of its high energy, battery voltage high operating temperature range, long storage life, etc., has been widely used in military and civilian small appliances, such as mobile phones, portable computers, camcorders, cameras and so on, in part to replace the traditional batteries. Large-capacity lithium-ion batteries in electric vehicles in the trial, will be the 21st century, the power of electric vehicles, one of the main driving force, and a satellite, aerospace and energy storage aspects applied.
Features
(1) lithium battery pack  single cell voltage up to 3.7V, is a nickel-cadmium batteries, nickel-metal hydride batteries 3 times, nearly two times the lead-acid batteries, lithium-ion battery which is higher than the energy of an important reason. Therefore, the driving force composed of the same voltage battery, the lithium-ion power batteries used in series figure would be considerably less than the lead-acid batteries and nickel-metal hydride batteries. If the battery power more in the number of single cells, the battery group, the consistency of single cells the higher the demand, the life the more well to do, in the Latitude D820 actual use of the process of problem analysis, battery pack, usually one or two a single battery problem then lead to problems with the whole group of cells, it is not difficult to understand why the 48V lead-acid batteries 36V lead-acid batteries than the feedback must be high, from this perspective is more suitable in terms of lithium power battery use. For example, 36V lithium only 10 monomers, while the 36V lead-acid batteries require 18 single cells, that is, three 12V battery packs, while the 12V lead-acid batteries each with six single-cell or 6 single cell composition.
(2), lithium battery pack  light weight, than the energy of large, up to 150Wh/Kg, is a nickel-metal hydride batteries two times, four times the lead-acid batteries, so the weight is the same one-third of the energy of lead-acid batteries to a quarter, From this perspective, the resources of lithium consumed less, and because manganese lithium batteries used in the reserves are more elements, so the relative lead-acid, nickel-metal hydride batteries may be further price increases, but the cost of lithium-ion power TD175 battery is further reduced. Lithium-ion battery electric bicycle weighs 2.2-4 kg, lead-acid batteries for the 12-20 kg weight, lithium-lead-acid batteries power weight is about one-fourth to one-third lighter than lead-acid batteries is about 10 kg (36V, 10Ah batteries), battery weight by 70%, reduced vehicle weight of at least 20%. Coupled with a general summary paragraph lithium trams are electric bicycles, due to the battery and vehicle of light, the same voltage, same capacity, longer battery mileage, the average electric vehicles weighing more than 40 kilograms, while the lithium-ion battery electric bicycle weight In between 7-26 kg. President and the elderly can be easily moved, human riding is also very lightweight, sports and leisure have both. (3), small size, high reach 400Wh / L, the volume is one-half to one third of lead-acid batteries. Provides a more rational structure and a more aesthetic appearance of the design conditions, design space and possibilities. At this stage because of lead-acid battery size, weight limits, designers have been greatly constrained the design ideas, leading to the present stage of electric bicycles in the structure and appearance to "1000 car side", identical similarity, monotonous uniformity. The use of lithium-ion battery, giving designers to showcase design ideas and design style, more room and conditions. Of course, also lead to electric bicycle lithium-ion battery sizes varied, is not conducive to the development of lithium-powered battery industry. Li-ion power battery industry is also urgent need to develop lithium-ion battery electric bicycle national PC764 standards, accelerate the field of lithium battery electric bicycle on the lead-acid battery replacement. Of course, the current lithium battery is the continuous development process of different materials, different processes the size of the battery are very different, how unified is also a difficult point.
(4) lithium battery pack  long cycle life, cycle times of up to 1000 times. In order to maintain the 60% of the total volume, battery charge and discharge cycles 100% up to 600 times more than the useful life of up to 3-5 years, the life expectancy of about two to three times the lead-acid batteries. Advent of technological innovations and equipment to improve the battery life will become longer, cost will be higher and higher. (5) self-discharge rate is low, less than 5% per month.
(6) allows a wide operating temperature range, low-temperature performance, lithium-ion battery can be between -20 ℃ ~ +55 ℃, particularly suitable for low temperature use, while the aqueous batteries (such as lead-acid batteries, nickel-metal hydride batteries) at low 312-0386 temperatures , due to deterioration of the electrolyte mobility will lead to performance significantly reduced.
(7) lithium battery pack  No memory effect, so every time the former do not like the nickel-cadmium rechargeable batteries, nickel-metal hydride batteries, need to discharge, can be recharged anytime, anywhere. The battery charge and discharge depth, little impact on battery life can be full-filled the whole place, and we filled the whole cycle of testing is to put all the.
(8) especially suitable for motive power batteries, in addition to the high-voltage lithium-ion battery, the lithium-ion power batteries because of the protection board can be a single battery for each high-precision monitoring, low-power intelligent management, with improved over - charge, over discharge, temperature, over-current, short circuit protection, lock since the resumption of balance of features and reliable charging function, greatly extending the battery life. While other types of battery (such as lead-acid batteries) in the course of coherence due to the battery, charger and so on, is easy to produce the battery overcharge, over-discharge and other problems (due to cost and other reasons, lead-acid battery pack can not be right Every single battery monitoring and protection).
(9) pollution-free, lithium-ion battery does not exist in toxic substances, so called "Green batteries", the state priority list. The lead-acid batteries and nickel-cadmium batteries because of the existence of harmful substances as lead and cadmium, the State is bound to strengthen the monitoring and governance (the export tax rebate cancellation of lead-acid Latitude D620 batteries, lead resource tax increases, limited the export of lead-acid electric bicycles), the corresponding business the cost will increase. Although lithium batteries no pollution, but from the perspective of resource conservation. Lithium-ion power battery recycling, recovery of the security, recovery costs are to be considered. (10) there is security risk; because of the high energy lithium-ion battery, materials poor stability, lithium prone to security issues, currently the world's leading mobile phone and notebook computer batteries (lithium cobalt oxide cathode materials and ternary materials), production enterprises, Japan's Sanyo, Sony and other companies require battery explosion spray rate was controlled at 40 ppb (billionth) the following, domestic firms can achieve ppm (parts per million) level was already pretty good, but the capacity of the battery power cell phone battery last for more than a hundred times, and therefore the safety of lithium is highly demanding. While the cobalt lithium batteries and battery with a ternary materials, lighter, smaller, etc., but they are not suitable for motive power batteries used in electric vehicles.
(11)lithium battery pack   the price is high; the same voltage and same capacity, lithium-ion battery 3-4 times the price of lead acid. With lithium-ion battery market expansion, cost reduction, performance improvement, as well as price increases lead-acid batteries, lithium-ion power battery is likely to cost more than lead-acid RC107 batteries.
Frame
Lithium-ion power battery usually has two kinds of shape: cylindrical and long square. Battery internal spiral winding structure, with a very elaborate and highly permeable material in polyethylene film isolate positive and negative interval formed. Cathode including lithium and cobalt dioxide, lithium-ion composition and the collector current is composed of aluminum thin film collector. Formed by a sheet of carbon anode materials of lithium-ion collector and copper thin film composed of the composition of the current collector. Rechargeable batteries with organic electrolyte solution. PTC is also equipped with safety valves and components, so that the battery in an abnormal state and output short-circuit the battery to protect against damage.
Single-cell lithium battery voltage is 3.6V, the capacity can not be infinite, therefore, often single-cell lithium batteries and parallel processing, in order to meet the requirements of different occasions.
Apply
As the twentieth century, the development of microelectronics technology, miniaturization of devices has increased, the power put forward a very high demand. Lithium-ion power battery entered a practical stage of large-scale. To be applied in the first cardiac pacemaker. As the lithium-ion battery self-discharge rate is very low, flat discharge voltage. Makes the pacemaker implanted in human long-term use is possible.
Lithium-ion power batteries are generally higher than the nominal voltage of 3.0 volts, more suitable for integrated circuit power supply. Manganese dioxide Y9943 battery, widely used in computers, calculators, cameras, wristwatches.
Now, a large number of lithium-ion battery used in mobile phones, it can be said to be the largest group of applications.

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