What Is Involved in Lithium Production?
"Lithium battery" is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. In 1912, lithium metal batteries were first proposed and studied by Gilbert N. Lewis. In the 1970s, MS Whittingham proposed and began researching lithium-ion batteries. Due to the very active chemical properties of lithium metal, the processing, storage, and use of lithium metal have very high environmental requirements. With the development of science and technology, lithium batteries have now become mainstream.
- Compare battery capacity. The average nickel-cadmium battery is 500mAh or 600mAh, and the nickel-hydrogen battery is no more than 800-900mAh; while the capacity of lithium-ion mobile phone batteries is generally between 1300-1400mAh, so the lithium battery is used for about the same time as a nickel-hydrogen battery 1.5 times, about 3.0 times that of nickel-cadmium batteries. If you find that the operating time of the lithium-ion mobile phone battery block you purchased is not advertised or specified in the manual, it may be counterfeit.
- Look at the plastic surface and plastic material. Genuine batteries have a uniform abrasion-resistant surface and are made of PC material without brittleness. Counterfeit batteries have no abrasion-resistant surface or are too rough. They are made of recycled materials and are easily brittle.
- Measure the charging voltage of the battery block. If you use a cadmium nickel or hydrogen nickel battery block to counterfeit a lithium ion mobile phone battery block, it must be composed of 5 single cells. The charging voltage of a single battery generally does not exceed 1.55V, and the total voltage of the battery block does not exceed 7.75V. When the total charging voltage is below 8.0V, it may be nickel cadmium,
- Lithium-ion batteries are divided into liquid lithium-ion batteries and polymer lithium-ion batteries. The electrolyte of a lithium-ion battery is fluid, so it is more unstable than a lithium polymer battery, and it may explode if it is hit by an external force or if a non-compliant charger is used. Many mobile phones, laptops, etc.
- High energy density
- Lithium-ion batteries have the same capacity as nickel-cadmium or
- In order to avoid over-discharging or over-charging of the battery due to improper use, a triple protection mechanism is provided in the single-cell lithium-ion battery. The first is the use of switching elements. When the temperature in the battery rises, its resistance value rises. When the temperature is too high, it will automatically stop the power supply. The second is to choose an appropriate separator material. On the partition
- A research team at Ulsan University of Science and Technology in South Korea has developed a new type of lithium battery that charges 30 to 120 times faster than traditional lithium batteries. The team believes it can be used to make a battery pack for an electric car, so it takes less than a minute to fully charge the car.
- On March 13, 2013, the latest issue of "Sci. Report", a sub-issue of "Nature" magazine, published a major research result of Professor Wu Yuping's group at Fudan University. This latest study on aqueous lithium battery systems can improve lithium battery performance by 80%. Electricity
- Lithium batteries are durable and do not need to be equipped with expensive original chargers. Generally, ordinary chargers with brands can be used. The price is 15-20 yuan, eliminating the need to rely on mobile phones for direct charging. There is a fast charge (about 2-3 hours) and a slow charge (up and down of 10 hours). If the battery is more, fast charge is better.
- In addition, due to the characteristics of lithium batteries, discharge and overcharge operations are not required. The battery life depends entirely on the effective charging time. In other words, even if you start charging only half of the time, it has no effect on battery life.
- 1. Recognize memory effects
- Battery memory effect refers to the reversible failure of the battery, that is, the performance of the battery to recover after failure. The memory effect means that the battery automatically maintains this specific tendency after it has been subjected to a specific working cycle for a long time. This earliest definition was in nickel-cadmium batteries. Nickel-cadmium pouch batteries do not have a memory effect, and sintered batteries have a memory effect. Today's nickel metal-hydrogen (commonly known as nickel-hydrogen) batteries are not restricted by this definition of memory effect.
- Recommendation 1: It is not necessary to discharge the battery before each charge, and it is harmful because the battery life is shortened unnecessarily. Recommendation 2: It is not advisable to use a resistor to connect the positive and negative electrodes of the battery to discharge. The current cannot be controlled, and it is easy to over-discharge to 0V, and even cause the polarity of the battery of the series battery pack to be reversed.
- 2.The battery needs to be activated
- Before leaving the factory, the lithium-ion battery must go through the following process: the lithium-ion battery case is filled with electrolyte --- sealing --- formation, that is, constant-voltage charging, and then discharging, so that several cycles are performed, so that the electrode is fully wetted with the electrolyte, fully activated, and Until the capacity reaches the required level, this is the activation process-dividing capacity, that is, testing the capacity of the battery. Selecting batteries of different performance (capacity) to classify, classify the battery, and perform capacity matching. This is already activated.
- The battery delivered by the battery factory to the user sometimes takes a long time, as short as 1 month and as long as half a year. At this time, because the battery electrode material will be passivated, the manufacturer recommends that the battery used for the first time should be carried out 3- 5 full charge and discharge processes in order to eliminate the passivation of the electrode material and reach the maximum capacity.
- 3, the first three times do not need to charge 12 hours
- Earlier mobile phone nickel-metal hydride batteries required replenishment and trickle charging. To achieve the perfect state of fullness, it may take about 5 hours, but it does not take 12 hours. And the constant current and constant voltage charging characteristics of the lithium-ion battery determines that its deep charging time does not need 12 hours.
- 4. Is the rechargeable battery in optimal condition?
- Nickel-based batteries have the best state, generally reaching their maximum capacity between 100-200 cycles. For liquid lithium-ion batteries, such a hump phenomenon of cycle capacity does not exist at all. Lithium-ion batteries are not optimal.
- 5, the larger the charging current, the faster the charging?
- For the charging of lithium-ion batteries, within a certain current range (1.5C-0.5C), increasing the constant-current current value of the constant-current and constant-voltage charging method cannot shorten the time to charge the lithium-ion battery.
- Lithium-ion batteries currently have liquid lithium-ion batteries (LIB) and
- Lithium batteries usually come in two shapes: cylindrical and square. The inside of the battery is a spiral winding structure, and a very fine and highly permeable polyethylene film separator is used to separate the positive and negative electrodes. The positive electrode consists of lithium cobaltate (or
- With the development of microelectronics technology in the twentieth century, more and more miniaturized devices have been put forward, which places high requirements on power supplies. Lithium batteries have subsequently entered a large-scale practical stage.
- The earliest application was lithium sub-cells for
- In order to develop more excellent varieties, various materials have been studied. To make
- China is the world's largest lithium battery manufacturing base, the second largest lithium battery producer and exporter, and lithium batteries already account for 40% of the global market share. In 2011, China s lithium battery output reached 2.966 billion units, an increase of 10.88% year-on-year. The domestic lithium battery export value was 438,300 US dollars, and the trade deficit was 335,070,700 US dollars. For details, see Foreseeing China s lithium battery industry market demand forecast and investment strategy planning analysis report".
- With the rapid development of China's mobile phones, laptops, digital cameras, electric vehicles, electric tools, new energy vehicles and other industries, the demand for lithium batteries will continue to grow. At the same time, due to the technological innovation of lithium battery manufacturers, people The demand for lithium batteries will continue to grow. It is expected that the growth rate of lithium battery production in China will remain above 10% in 2012, and the output value of China's lithium battery industry will reach 353 billion yuan by 2015.
- Lithium metal battery:
- Lithium metal batteries generally use manganese dioxide as
- The earliest application of lithium batteries in
- MSWhittingham of Exxon in the 1970s used titanium sulfide as
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|