Discussion on the cause of lithium battery pack drum

2022/04/08

  Author :Iflowpower – Portable Power Station Supplier

Discussion on the cause of lithium ion battery pack. Lithium-ion battery packs have no memory, even if mixed part of impurities is only small, but still some lithium-ion batteries have drums. So what is the cause of drum bag? Let Xiaobian take everyone to understand.

An important material for lithium-ion battery packs is configured as a positive material, an anode material, an electrolyte, a diaphragm. Positive electrode material: The positive electrode material has a large proportion (the mass ratio of the positive and negative electrode material is 3: 1 to 4: 1), because the performance of the positive electrode material directly affects the performance of the lithium ion battery, the cost is also directly determined that the battery is high. The quality of the mixed dispersion process in the entire production process of lithium ion batteries is greater than 30%, which is the most important link throughout the production process.

The electrode manufacturing of the lithium ion battery, the positive slurry is composed of a binder, a conductive agent, a positive material, and the like. The most widely used positive electrode material in the lithium-ion battery pack currently produced is still licoo2. Lifepo4 with olivine structure is currently about 95% of the theoretical capacity, and has the advantages of low price, high security, stable structure, no environmental pollution, and is considered to be very ideal in large lithium-ion batteries.

Positive material. Negative electrode material: The negative electrode material is important to affect the efficiency of the lithium-ion battery, and the performance of the negative electrode material also directly affects the performance of the lithium-ion battery. The negative electrode material accounts for about 10 to 20% of the total cost of the lithium ion battery.

Nowadays, there are only two major categories of negative electrode materials in large-scale commercialization, which is graphite carbon material and LTO. Other negative electrode materials include Si-type, SN-like alloy negative materials. Carbon negative material is a general name, which can generally be three major categories: graphite, hard carbon, soft charcoal negative electrode.

Electrolyte: Lithium Ion Battery Pack Electrolyte is a carrier of ionically transferred in a battery. Generally consisting of lithium salts and organic solvents. The electrolyte acts in conducting ions between the lithium ion battery, and the negative electrode is the guarantee of the advantages of high voltage, high ratio energy.

The electrolyte is generally raw material such as high purity organic solvent, electrolyte lithium salt, and necessary additives, and under certain conditions, it is formulated. Diaphragm: in the structure of the lithium ion battery pack, the diaphragm is one of the key innermost components. The performance of the diaphragm determines the interface structure, internal resistance, etc.

of the battery, directly affects the capacity of the battery, cycle, and safety performance, and excellent performance of the diaphragm to improve the overall performance of the battery. An important use of the diaphragm is to separate the positive and negative electrodes of the battery, preventing the two poles from being short-circuited, and there is also a function that enables electrolyte ions. What is the specific cause of lithium-ion battery pack drum bag? Safety valve: The safe valve opening is too high, or the safety valve is blocked.

When the pressure in vivo increases to a certain extent, the valve cannot be opened normally, and it is bound to deform in this case. Floating charge voltage: The floating voltage is too high, the charging current is large, resulting in acceleration of O2 on the positive plate, and it is not as good as the negative composite, and the temperature rise in the battery is also very fast, in the exhaust, the pressure reaches a press, Make the lithium ion battery pack. Overcharge: If the lithium-ion battery pack is charged, if there is a quality battery, there is a phenomenon of internal gas composites, thereby occurs.

How to deal with the lithium-ion battery bag after the lithium-ion battery bag? The lithium-ion battery pack of the drum can be directly given the use. After all, the battery capacity has been affected. The internal route of the battery has also problems, and there is a big possibility of continuing use.

Danger. The lithium-ion battery pack of the drums that do not intend to use should discard the recycling trash can associated classification, do not abandon themselves to the wild to prevent danger. .

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