Lithium iron phosphate battery anode material from Pacific Automotive Network, artificial graphite is a commonly used anode material for lithium ion batteries. Its crystals are stacked in a planar hexagonal mesh format composed of carbon atoms and have a. layered structure. Graphite has good conductivity and high crystallinity. The lithium ions are deeply embedded in the graphite layer, forming a lithium-integrated LixC6 compound.
Anode - artificial graphite Artificial graphite is a commonly used anode material for lithium-ion batteries. Its crystals are stacked in a hexagonal mesh plane composed of carbon atoms and have a layered structure.
Graphite has good conductivity and high crystallinity. The lithium ions are deeply embedded in the graphite layer, forming a lithium-integrated LixC6 compound. During charging and discharging, the desire reactionntercalation of lithium in graphite is: C6+xLi++xe-=LixC6
Electrolyte Electrolyte is an important component of the battery and plays a conducting role between the positive and negative electrodes. drums. The role of the ions is to connect the materials of the positive and negative electrodes.
Separator The separator is one of the key internal structures of the battery cell. Its main function is to separate the positive and negative electrodes of the battery and prevent the two poles from contacting and short circuiting; ion passage function; When the battery overheats, it is blocked by the shutter function. Current conduction in the battery.
The main raw materials of the separator are polyethylene PE and polypropylene PP. The current production process includes dry method and wet method. The specific product comparison is as follows:
Conduct conductive agenteur. The agent is to ensure that the electrode has good charging and discharging performance. A certain amount of conductive material is usually added during the production of the pole piece to improve the charging and discharging efficiency of the electrode.
Binder The raw material ratio of a complete lithium-ion battery should include active material, conductive agent, binder, solvent and additives, among which the binder plays the role of binding the active material. Although the amount of bonding between materials and sheets, active materials and active materials, and active materials and conductive agents is small, their functions are irreplaceable.
Physical and chemical parameters and standards of PVDF: Physical and chemical parameters and standards of CMC/SBR: Source of this article: Lithium Battery Frontier, please indicate the source when reprinting. Xincheng Information was established in 2010 and servesmainly the three major industries of lithium battery, carbon and electric furnace steel. It is a professional industrial research and consulting company in China. Xinchen Information is research-focused and provides media information, research consulting, databases and marketing solutions.
(Images/Text/Photos: Pacific Automotive Network Q&A)
Nadao Power Supply, the leading solid-state battery stock
Lithium battery protection board is charge and discharge protection for lithium batteries in series; Its function: Effectively improve the charging effect in series charging mode, and simultaneously detect overvoltage, undervoltage, overcurrent, short circuit, etc. Battery overheating condition, protects and extends battery life.
The battery protection carde lithium battery, as the name suggests, is used to protect lithium batteries. The function of the lithium battery protection board is to protect the battery from discharge, overcharge and overcurrent, as well as output short circuit. -circuit protection.
The finished lithium battery mainly consists of two parts, the lithium battery core and the protection plate. The battery core is mainly composed of a positive plate, a separator , a negative plate and an electrolyte; the positive plate, separator and negative plate are rolled or rolled, wrapped, filled with electrolyte and packaged to form a battery core.
Detailed information:
1. Judging from the overcharge and overdischarge functions of Li-ion batteriesthium
When separating the charging and discharging performance of lithium batteries, the protection board can be roughly divided into two types: one is a single function, that is say one-way protection of battery against overcharge or over-discharge, the other is two-way protection, with overcharge and over-discharge functions. . Function. Two-way protection panels are currently more widely used than single protection panels.
2. Judging from the combination of lithium batteries
The different series and parallel connection methods of lithium batteries also directly lead to different protection boards of lithium batteries. It is divided into two categories: series connection and parallel connection. The battery in series should increase the overall voltage, and the battery in parallel should increase the overall capacityTHE. Therefore, the lithium battery protection board is also divided into two types according to the two battery connection methods.
3. From the perspective of customer requirements
Lithium battery protection boards are used in various fields, but each field has different voltage and current requirements for lithium batteries, it is why Due According to the different parameter requirements, it is determined that the internal components of the lithium battery protection board need to be modified to change the specific parameters of the protection board.
4. From the perspective of board quality
The boards of lithium battery protection boards are divided into hard boards, commonly known as hard boards. This type of card is currently the most used. most commonly used; they are soft boards; there are multi-layer boards corresponding and double boards; if these boards are combined in different ways, they will be split. in more types.
Baidu Encyclopedia - Lithium Battery Protection Board
1. Solid-state battery
Solid-state battery is a type of battery. technology. Unlike currently widely used lithium-ion batteries and lithium-ion polymer batteries, solid-state batteries are batteries that use solid electrodes and solid electrolytes. Because the scientific community believes that lithium-ion batteries have reached their limits, solid-state batteries have been considered in recent years as the battery that can inherit the status of lithium-ion batteries. Solid-state lithium battery technology uses a glass compound composed of lithium and sodium as a conductive material to replace the electrolyte of lithium batteries prand significantly improve the energy density of lithium batteries.
2. Advantages of solid-state batteries
(1) Light – high energy density. After using all-solid electrolytes, the material system suitable for lithium-ion batteries will also change. One of the key points is that it is not necessary to use lithium inlaid graphite negative electrode, but directly use lithium metal as the negative electrode, which can greatly reduce the amount of welding material. negative electrode and significantly improve the overall efficiency.Energy density of the battery.
(2) Thin - small size. In traditional lithium-ion batteries, separators and electrolytes are required, which together account for almost 40% of the battery's volume and 25% of its mass. But if solid electrolytes (mainly organic ceramic materials et inorganic) are used instead, the distance between the positive and negative electrodes (traditionally filled with separator electrolytes, now filled with solid electrolytes) can even be reduced to a few to ten microns, so that the battery thickness can be significantly reduced - therefore, all-solid-state battery technology is the only way to miniaturize and refine batteries.
(3) The flexibility perspective. Even fragile ceramic materials can often bend and become malleable when their thickness is less than a millimeter. As a result, the flexibility of all-solid-state batteries will be significantly improved once they are made lighter and thinner. By using proper encapsulation materials (not hard shells), the resulting battery can withstand hundreds or even thousands of bends with minimal perforation degradation.mances.
(4) Safer. Traditional lithium batteries may have the following dangers: lithium dendrites may appear during high current operation, piercing the diaphragm and causing short circuit damage; temperature trend. Using all-solid-state battery technology can directly solve the above two problems.