Power Lithium Batteries-CSIP

The cylindrical battery (cyclinder cell), by the way, the other battery name, the industry called the square battery for prismatic cell, soft pack battery for pouch cell, compared to many people to contact the concept of cylindrical battery, the assemble in the mind is the childhood torch used at home, or remote control in the use of cylindrical battery, and we are today to say Today we are going to talk about the power lithium-ion battery.

2,ternary lithium is more resistant to low temperature; lithium battery will become weak chicken in low temperature, lithium iron phosphate low temperature limit value is generally -20 ℃, ternary lithium can withstand -30 ℃ low temperature, and 0 to -20 ℃, lithium battery attenuation of about 10% -30%, and ternary lithium attenuation degree is generally 10% lower than lithium iron phosphate. Currently, many car companies and battery manufacturers are developing more advanced thermal management technologies as a way to improve the low temperature resistance of power batteries.

Power lithium battery ---CSIP New Energy

(2) According to the different electrolyte materials, lithium batteries are divided into liquid lithium batteries (LIB) and lithium polymer batteries (PLB). Liquid lithium batteries are used in liquid electrolyte solutions (mainly for electric rechargeable batteries). This polymer can be dry or colloidal, which is currently the choice for most polymer electrolyte solutions. For solid-state batteries, the exact meaning is that both the liquid level and the electrolyte are solid. Classification by type of commodity: cylindrical, flexible pouches and square. Cylindrical and square overpacks are usually made of aluminium or aluminium. Flexible pouches have an aluminium-plastic film outer packaging.

Lithium-ion batteries use elemental carbon materials as the negative electrode and compounds containing lithium as the positive electrode. There is no lithium metal, only lithium ions are present and the process of charging and discharging is the embedding and de-embedding of lithium ions. In the process of embedding and de-embedding of lithium ions, it is accompanied by the embedding and de-embedding of electron equivalents of lithium ions (customarily, the positive electrode is represented by embedding or de-embedding, while the negative electrode is represented by insertion or de-insertion). During the charging and discharging process, lithium ions are embedded/de-embedded and inserted/de-inserted back and forth between the positive and negative electrodes, which is imaginatively referred to as a "rocking chair battery".

A power cell is a small piece of battery inside the power cell of a new energy vehicle. A power pack is generally made up of 12 cells assembled into a module, and then 16 modules. Among the cells are mainly composed of positive electrode material, negative electrode material, electrolyte and diaphragm and other parts, and according to the different positive electrode materials, it can be divided into lithium iron phosphate and ternary lithium batteries, etc.

Cylindrical 18560 battery monoblock is mainly composed of positive electrode, negative electrode, diaphragm, positive and negative electrode collector, ATS valve, overcurrent protection device, insulation parts and shell together. Shell, early steel shell more, the current aluminum shell is the main. Single overcurrent protection device, each manufacturer's design is not the same, according to the price varies according to the different requirements for ATS. PTC, when there is too much current, resistance heating, temperature accumulation prompted by the rise of PTC resistance, when the temperature exceeds a threshold value, steep bind large

This is equivalent to isolating the faulty core from the overall circuit to avoid further thermal runaway. The fusing device, in principle, is a fuse which, when encountering excessive current, fuses and breaks the circuit. The difference between the two types of protection is that the former is recoverable, while the latter is a one-off protection.

Once a fault has occurred, the core needs to be replaced.

Of all the lithium ion cells manufactured, the cylindrical cell is the most standardised and the earliest commercially available cell, and is significantly more efficient to assemble than the square cell and soft pack cells. The winding process of cylindrical cores has gradually increased with automation and is now at the level of 200PPM (200pcs/min), even though the efficiency of large cylinders (e.g. 33140, 34190, 4680, etc.) is slightly lower than that of traditional 18650/21700 cylindrical cores, it is still much higher than the efficiency of the laminating process or winding process of square cores and soft pack cores (usually around 10PPM). 10PPM or so).

The 18650 cylindrical cells, due to their structural characteristics and the standardisation of their type, allow for a higher level of automation in the production of the three main cell types. This makes it possible to achieve a high degree of consistency and a corresponding increase in yield, with Japanese and Korean companies generally above 98% and domestic companies also reaching 90%.
This has resulted in a high degree of consistency and a corresponding increase in the yield, which is generally above 98% in Japan and Korea and 90% in China.