Lithium Batteries Knowledge
1. The ratio of positive and negative materials for lithium-ion batteries should be reasonable. Since the active materials of the positive and negative electrodes are fixed on the substrate by the binder, the long-term stability of the binder and the good mechanical properties of the battery can delay the decline of the battery life, so to improved the positive electrode material's chemical stability and thermal stability is one of the feasible methods to maintain battery life.
Large-scale energy storage: Generally, comprehensive factors such as environmental protection, service life, and floor space are involved. Generally, it is recommended to use lithium iron phosphate battery cells, especially large-capacity lithium iron phosphate batteries;
Small energy storage: generally 26650, 32650 lithium iron phosphate battery cells can be selected;
Small power: Generally, you can choose the same battery as the small energy storage, or you can choose a relatively safe ternary material system battery; you can take into account the volume ratio energy and weight ratio energy issues;
What are the common positive and negative materials in the lithium-ion battery industry? The main constituent materials of lithium-ion batteries include electrolytes, separator materials, and positive and negative electrodes. Cathode materials and anode materials are one of the key materials that determine the performance of lithium-ion batteries, and are also the main source of lithium ions in current commercial lithium-ion batteries. Their performance and valence have a greater impact on lithium-ion batteries.
The voltage of a lithium ion battery is determined by the electrode potential. Voltage, also known as potential difference, is a physical quantity that measures the energy difference of electric charges in an electrostatic field due to different potentials. The electrode potential of lithium ion is about 3V, and the voltage of lithium ion batteries varies with different materials. For example, a general lithium-ion battery has a rated voltage of 3.7V and a full-charge voltage of 4.2V; while a lithium iron phosphate battery has a rated voltage of 3.2V and a full-charge voltage of 3.65V. In other words, the potential difference between the positive electrode and the negative electrode of a lithium-ion battery in practical use cannot exceed 4.2V, which is an element based on material and use safety.
The current ternary batteries basically refer to ternary lithium-ion batteries, including ternary soft pack batteries and ternary 18650 batteries. How about ternary lithium-ion batteries? The following describes its performance characteristics from the aspects of ternary battery materials, voltage, and energy density.
High-rate polymer lithium-ion battery, let's first understand the concept of rate. How to understand the discharge rate? The discharge rate refers to the current value required by the battery to discharge its rated capacity within a specified time. The data value is equal to the multiple of the battery's rated capacity, usually represented by the letter C. Generally speaking, if the C number is greater than 1, it means a high rate. High rate is a relative concept. The larger the C number of a lithium-ion battery, the higher the rate of the battery.
Due to the wide application of lithium batteries in portable electronic products, coupled with the continuous expansion of the demand for lithium batteries in the electronic product market, many large and small lithium battery manufacturers have been born, and which brand of lithium batteries is good has become an electronic product buyers often have to consider issues, because the quality of lithium battery brands will directly affect the competitiveness and survival cycle of their end products in the market and the space for profit.
Electronic devices have become an indispensable part of people's lives, but these rely on battery-powered electronic products may have some headaches. Many explosions of lithium-ion batteries have made people realize that small lithium-ion batteries may also cause significant harm. The explosion of these lithium-ion batteries is often due to the purchase of fake and shoddy products, because the quality of the battery itself is not enough. However, some inadvertent details in the process of using lithium-ion batteries will also make your battery dangerous.
Twenty years ago, the fuel gauge IC did not appear. The earliest design was that the single chip microcomputer detected the battery voltage through the AD port to determine the remaining battery capacity. This method of voltage detection discharges the battery small current, and the battery power error is still accurate because If the voltage gradually decreases, just set a few fixed voltage points to judge, such as 100%, 75%, 50%, 25%, 10% voltage corresponding to several capacities...
After years of development, the lithium battery industry has formed a complete industrial chain with a high degree of specialization. Do you know how the lithium battery is made?