canrd

1.  Vacuum mixer SFM-7 It is used for stirring and shaking materials; it has high vacuum degree, strong stirring force and adjustable vibration amplitude. It is a dual-purpose machine with great value for money.   2. Digital Rotational Viscometer SNB-2-H A new digital product developed based on single-chip microprocessor technology and used to measure the viscous resistance and absolute viscosity of liquids.   3. Automatic coating and drying machine MSK-AFA-III Applicable to various high-temperature coating research. Ceramic thin films, crystal thin films, battery material thin films, special nano thin films. This product is equipped with a heating and drying system, and the materials are dried synchronously.   4. 52L  vacuum drying oven DZF-6050 Suitable for heating and drying items under vacuum conditions. Accurate temperature control, high precision; temperature control range from room temperature to 250 degrees; volume 52 liters...

Due to the rapid development of lithium-ion batteries, people's daily life and production methods have undergone tremendous changes. At present, lithium-ion batteries are needed in everything from laptops, tablets, cameras, mobile phones to new energy vehicles, and lithium-ion battery products have spread to every corner of people's lives.

Among many battery technologies, lithium titanate batteries stand out for their excellent safety and are considered the safest type of battery currently. This article will explore the characteristics of lithium titanate batteries in depth and analyze why they are superior to other battery technologies in terms of safety.

Lithium-ion batteries (LiBs) provide power for electric vehicles (EVs), and the anode plays a crucial role in their performance. Graphite materials, with excellent conductivity, thermal stability, and high performance, are the primary anode materials for lithium-ion batteries. Graphite has become the earliest commercialized negative electrode material for lithium-ion batteries due to its advantages such as high electronic conductivity, large lithium ion diffusion coefficient, small volume change before and after lithium insertion in its layered structure, high lithium insertion capacity (theoretical capacity can reach 372mA·h/g), and low lithium insertion potential.

Analysis of parameters, advantages and disadvantages of lithium manganese oxide batteries Lithium manganese oxide battery parameters: Nominal voltage: 3.7v Output voltage range: 2.5~4.2v Nominal capacity: 7500mAh Standard continuous discharge current: 0.2C Maximum continuous discharge current: 1C Working temperature: Charging: 0~45℃ Discharge: -20~60℃ Product size: MAX 19.2*56.5*69.5mm Finished product internal resistance: ≤200mΩ Lead wire model: National standard wire UL3302/26#, wire length 50mm, white wire is 10K NTC Protection board parameters: (Each parameter can be set according to customer products) Overcharge protection voltage/each string 4.28±0.025V Over discharge protection voltage 2.4±0.1V Overcurrent value: 2~4A

Lithium iron phosphate battery refers to a lithium-ion battery that uses lithium iron phosphate as the positive electrode material. The positive electrode materials of lithium-ion batteries mainly include lithium cobalt oxide , lithium manganese oxide, lithium nickel oxide, ternary materials, lithium iron phosphate, etc. Among them, lithium cobalt oxide is the positive electrode material used by most lithium-ion batteries at present. From the principle of materials, lithium iron phosphate is also an embedding and de-embedding process, and this principle is exactly the same as that of lithium cobalt oxide and lithium manganese oxide.

Ternary lithium battery classification Ternary lithium batteries, that is, lithium batteries that use nickel cobalt manganese oxide ( NCM ) or nickel cobalt aluminum oxide (NCA) as the positive electrode material, have various classification methods according to different classification standards. 

  Introduction to Lithium-ion Batteries (LIB) Lithium-ion batteries are mainly composed of four parts: positive electrode materials, negative electrode materials, separators, and electrolytes . The positive electrode materials must participate in chemical reactions and also provide Li+ as a lithium ion source; the negative electrode materials are also an important component of the battery, generally carbon, lithium titanate, and silicon-based alloy materials; the main function of the separator is to prevent the positive and negative electrode materials from directly contacting each other and causing a short circuit, and it is generally a porous membrane material such as polyethylene or polypropylene; the role of the electrolyte is to provide a channel for the transmission of lithium ions and promote the reversible reaction of the electrode. It is mainly composed of electrolyte lithium salts, non-aqueous organic solvents, and necessary additives. Figure 1. Applications of lithium-io...

Lithium cobalt oxide is the first commercialized cathode material for lithium-ion batteries. Its theoretical gram capacity after complete delithiation is 274 mAh/g, its true density is as high as 5.1 g/cm  3  , and its actual compacted density can reach 4.2  g/cm  3.  It has an extremely high volume energy density (the advantage is prominent under high voltage) and is still the most widely used cathode material for consumer batteries.In fact, lithium cobalt oxide has three crystal structures, namely high-temperature phase HT-  LiCo  O  2  , low-temperature phase LT  - LiCo  O  2  , and rock salt phase LiCo  O  2.  Among them, the synthesis temperature of low-temperature phase lithium cobalt oxide is relatively low, and the crystal structure characteristics are between the layered structure and the spinel structure. The Li layer contains about 25% Co atoms, and the Co layer contains about 25% Li ato...

  3 2.What is the IEC standard cycle life test?   IEC stipulates that the standard cycle life test for NiMH batteries is:   After the battery is discharged at 0.2C to 1.0V/piece 01) Charge at 0.1C for 16 hours, then discharge at 0.2C for 2 hours and 30 minutes (one cycle)   02) Charge at 0.25C for 3 hours and 10 minutes, discharge at 0.25C for 2 hours and 20 minutes (2-48 cycles)   03) Charge at 0.25C for 3 hours and 10 minutes, discharge at 0.25C to 1.0V (49th cycle)   04) Charge at 0.1C for 16 hours, leave for 1 hour, and discharge at 0.2C to 1.0V (50th cycle). For NiMH batteries, repeat 1-4 for a total of 400 cycles, and the 0.2C discharge time should be greater than 3 hours; for NiCd batteries, repeat 1-4 for a total of 500 cycles, and the 0.2C discharge time should be greater than 3 hours.

  I. Some important concepts Lithium iron phosphate battery (LFP) and ternary lithium battery (NCM/NCA) are two mainstream lithium-ion battery technologies. The following are their main differences:

Lithium-ion battery overview Lithium-ion battery is a secondary battery. Its working principle is: during the charge and discharge process, lithium ions are in a state of movement from positive electrode → negative electrode → positive electrode. During the charge and discharge process, lithium ions are intercalated and deintercalated back and forth between the two electrodes. That is, during charging, lithium ions are deintercalated from the positive electrode and intercalated into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state. The opposite is true during discharge. Lithium-ion batteries are complex systems consisting of positive electrode materials, negative electrode materials, electrolytes , separators, conductive agents, binders and packaging materials. Due to their high operating voltage, high specific energy density, long cycle life and wide operating temperature range, lithium-ion batteries have been widely used in new ene...

1. Electrolyte It is an important component of lithium batteries. It conducts lithium ions inside the battery and has an important impact on the performance and life of the battery. Lithium battery electrolyte is usually composed of organic solvents, electrolytes and additives.   Organic solvent is the main component of electrolyte, which is usually a flammable, explosive and toxic liquid, such as dimethyl carbonate (DMC), ethyl methyl carbonate (EMC), diethyl carbonate (DEC), etc.  These organic solvents can dissolve electrolytes to form ion conductors, and can also provide a certain electrochemical stability.   Electrolyte is an ion conductor in the electrolyte, which is usually a lithium salt,  such as LiPF6, LiBF4, LiClO4, etc. These lithium salts can dissociate into lithium ions and negative ions in the electrolyte, thereby realizing the conduction of lithium ions.   Additives are some chemical substances added to improve the performance of the electrolyt...