Lithium ion battery characteristics

It usually refers to a battery with a negative electrode made of lithium metal or lithium alloy and using a non-electrolytic solution. Lithium ion battery refers to rechargeable secondary battery, the negative electrode does not use lithium metal, rely on lithium ions to move between the positive and negative poles to work. However, in daily life, people are used to lithium ion battery referred to as lithium battery or lithium battery.

Compared with traditional batteries such as lead-acid, nickel-chromium and nickel-metal hydride, lithium batteries do not produce toxic and harmful heavy metal elements such as lead, mercury and cadmium, thus causing relatively light pollution. And its electrolyte is organic solvent and lithium salt, mostly nontoxic or low toxicity. Lithium ion battery characteristics

(1) voltage platform

Due to the different anode and cathode materials used in lithium ion batteries, the working voltage range of its single battery is 3.7-4.2v. Among them, the working voltage of lithium iron phosphate single battery with a large scale is 3.2v, which is 3 times of that of nimh battery and 2 times of that of lead-acid battery.

(2) specific energy

The current energy density of lithium ion power battery for passenger cars is close to 200Wh/kg, and it is expected to reach 300Wh/kg in 2020.

(3) long battery life

Limited by the characteristics of electrochemical materials, the cycle times of lithium ion batteries are relatively long. Take lithium iron phosphate as an example, the cycle times of single batteries can reach more than 2000 times, and the cycle times of group batteries are only more than 1000 times.

(4) little impact on the environment

Lithium ion batteries use light metal lithium, although does not contain mercury, lead and other harmful heavy metals, is considered a green battery, less environmental pollution.

(5) the cost is relatively high

The initial purchase cost of lithium ion battery is high. Take the lithium iron phosphate battery, the mainstream power battery for bus, as an example. The price is about 2500 yuan /kWh. Due to the restriction of the number of cycles after the single battery is formed into a group, buses usually need to replace the battery within 3 years or so, and the operating unit cost is under great pressure.

(6) little impact on the power grid

First, the large-scale application of pure electric vehicles, due to the large demand for charging, charging equipment harmonic interference on the grid will be prominent, affecting the power supply quality of the grid; Secondly, during quick charging, the charging power is relatively high (about 50kW for passenger cars and 150kw ~250kW for passenger cars) due to the high rate of charging, which has a great impact on the load of the power grid.

Through the above explanation, we know that compared with the traditional battery, lithium-ion batteries, lithium batteries, light dead weight, can travel far, for small quantity of environment pollution, so now the battery on the market, is also the mainstream batteries, lithium-ion batteries we can force the king specializing in the production of lithium batteries and custom battery packs of professional manufacturers, our products are mainly applicable to electric bicycles, solar street lamp, electric tools, etc.

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