​The development history of Lithium-ion battery (Part I)

In 1970, Exxon's MS Whittingham used titanium sulfide as the starting material and metallic lithium as the negative electrode material to assemble the first lithium battery. The transition material of lithium batteries is manganese dioxide or thionyl chloride, and is no longer lithium. After the battery is assembled, the battery has voltage and does not […]

​The development history of Lithium-ion battery (Part II)

Throughout the history of battery development, we can see the three characteristics of the current world battery industry development. One is the rapid development of green and environmentally friendly batteries, including lithium-ion batteries, nickel-hydrogen batteries, etc.; the other is the conversion of primary batteries to batteries, which is consistent with sustainable development strategy; the third […]

The key advantages of Lithium-ion battery

1) High voltage The operating voltage of the single battery is as high as 3.7-3.8V (3.2V for lithium iron phosphate battery), which is 3 times that of Ni-Cd and Ni-MH batteries. 2) High energy density The actual specific energy that can be achieved is about 555Wh/kg, that is, the material can reach a specific capacity […]

​The development trend of Lithium-ion battery

1) Polymers Polymer lithium-ion batteries are developed on the basis of liquid lithium-ion batteries, using conductive materials as the positive electrode, carbon materials as the negative electrode. The electrolyte is composed of solid or gel organic conductive film, and the outer packaging is the latest version of the aluminum-plastic film. Because of its more stable […]

​Do you know the 18650 Lithium-ion battery cell?

18650 is a standard lithium-ion battery model set by SONY, the originator of lithium-ion batteries, in Japan in order to save costs, where 18 means a diameter of 18mm, 65 means a length of 65mm, and 0 means a cylindrical battery. 18650 theoretical battery life is 1000 cycles. Due to the large capacity of the […]

Brief introduction of LFP battery and NCM/NCA battery

Lithium Iron Phosphate Battery During the charging process, part of the lithium ions in the lithium iron phosphate are released, transferred to the negative electrode through the electrolyte, and embedded in the negative electrode carbon material; at the same time, electrons are released from the positive electrode and reach the negative electrode from the external […]

​Advantages of lithium iron phosphate batteries

Lithium iron phosphate batteries, like lithium manganese oxide, lithium cobalt oxide, and ternary lithium batteries, are the branches of lithium-ion batteries. Its performance is mainly suitable for power applications. The advantage of lithium iron phosphate battery mainly refers to its comparison with other batteries in power applications. In this sense, it will mainly compare its […]

Common terminology of Lithium-ion battery (1)

Capacity The capacity of the battery is under certain discharge conditions, which is represented by the symbol C. The common unit is ampere hour, abbreviated as Ah or mAh. The capacity of battery can be divided into theoretical capacity, rated capacity and actual capacity. The theoretical capacity is the highest theoretical value obtained by calculating […]

Common terminology of Lithium-ion battery (2)

C-rate C is the first letter of capacity, which is used to indicate the current value when the battery is charged and discharged. For example, when the rated capacity of a rechargeable battery is 1000mah, it means that the discharge time lasts for 1 hour at 1000mA (1C); the discharge time lasts for 5 hours […]

Common terminology of Lithium-ion battery (3)

Over discharge In the process of discharge, if the battery exceeds the cut-off discharge voltage and continues to discharge, the internal pressure of the battery will increase, the reversibility of positive and negative active substances will be damaged, and the capacity of the battery will be significantly reduced.   Over charge When the battery is […]