Analysis of the causes of lithium iron phosphate ion battery packs and battery drums

　　Author ：Iflowpower – Portable Power Station Supplier

Lithium iron phosphate ion battery pack is the most used, the most widely used battery. Lithium-ion battery is a rechargeable battery, which is important to rely on the round trip embedding and deinterlining of lithium ions between the positive electrode and the negative electrode, and achieve storage and release of energy. When the battery is charged, the external electric energy is used to reproduce the internal active substance, and the electrical energy is stored as chemical energy.

When it is discharged, the chemical energy is converted into an electric energy output. Lithium iron phosphate ion battery drums Cause: Yi. The lithium-ion battery drum bag excessive charging causes all the lithium atoms in the positive electrode material to run into the negative electrode material, causing the positive polarized grid to collapse, this is also iron phosphate An important reason for the decline in lithium-ion battery pack.

In this process, the lithium ions of the negative electrode are increasing, and over-accumulation makes the lithium atoms long out of the stump crystallization, so that the lithium ion battery pack is bulging. Second. The translating drum bag is in the first charge and discharge process of the liquid lithium ion battery, and the electrode material is reacted on the solid-liquid phase interface to form a passivation layer covering the surface of the electrode material.

The formed passivation layer film can effectively prevent the passage of the electrolyte molecule, but Li + can be freely embedded and discharged through the passivation layer, and has the characteristics of solid electrolyte, so this layer of passivation film is called SI. The SEI film is not a constant, there will be a little change during the charge and discharge process, it is important that some organic matter will reversible changes. After excessive discharge of the lithium phosphate ion battery pack, the SEI membrane causes reversible breaking rings, and protects the adhesive material to the negative electrode material, thereby forming a bulk phenomenon.

Three. The lithium-ion battery drum bag may be the problem of lithium iron ion battery pack manufacturing level, the electrode coating is uneven, and the production process is relatively rough. IV.

The phenomenon of lithium iron phosphate ion battery pack does not have to happen, since the air is electrically conductive, and therefore, the time is too long, which is equivalent to direct contact with the positive and negative electrode of the battery, and chronic Short circuit. How to solve the processing?. Try not to rely on some methods to teach online, continue to use the battery.

2, usually, don't play mobile phones, charge. Regularly adhere to the situation of the battery to avoid dangerous situations. 3, usually, when charging, pay attention to the choice of charger, for example, the rated charging voltage of the battery is 3.

7V, limit voltage 4.2V, try to exceed this voltage, can keep constant currents best. 4.

Select the lithium iron phosphate ion battery pack produced by the manufacturer, which is relatively reliable in terms of quality. Important, or usually, your usage habits, the degree of damage to the battery, you should pay more attention. 5.

If the mobile phone battery has been charged, it is to find the void of the battery with your fingers. The air runs out. 6, if you have a lot of fast lithium phosphate ion battery packs, it should be the cutoff voltage of the charger you use and the battery does not match, recommended replacement.

Reasons for battery drums: 1. Safety valve pressure over high valve controlled lead-acid battery is provided with a row of safety valves to ensure safe use, when the pressure in the battery rises, the safety valve will automatically open, perform pressure, Ensure that the internal and outer air pressure balance in the battery. When the pressure is rising in the battery, the safety valve cannot be opened normally.

For a long time, since the pressure in the battery is too high, the internal and external gas pressure is unbalanced, there will be a phenomenon of drums. Second. Over-filled storage battery engineers repeatedly stressed that the battery should prevent overcharge and over-discharge, and the overcharge will lead to poor gas composites in the battery.

There is a severe reaction of the battery in the battery, which has a large amount of heat, which leads to electrolytes. Decompose gasification, the battery is drumping. III.

The charging current is too large. According to the battery instructions, the battery BT-HSE12V battery charging current cannot exceed 0.25C, and the recommended recommendations are 0.

1c (10a), while charging current is greater than this reasonable current value, it is easy Leading the precipitation of the electrode plate too fast, which in turn leads to insufficient chemical reactions. At this time, the temperature inside the battery will rise rapidly. If the exhaust is not in time, there will be a phenomenon of battery drums.

IV. The floating charge is set too high, and the charging current is large, causing the o2 in the positive plate to accelerate, and it is not as good as the negative composite, and the temperature rise in the battery is also very fast, in the exhaust When the pressure reaches a press, the VRLA battery is deformable. The reason for electric vehicle lithium-ion battery drums: 1, the quality of charger is low, the price war is killed, the charger quality is declining, using inferior plate, refurbishment or low inferior device, fever, parameter drift is not accurate, so that the charging limit is out of control, The internal gas extrusion of lithium ion battery pack results in a deformation of the battery shell and even explosion.

2, the charging time is too long, some users don't have time concept, thinking that inserting a charging full automatic stop, I don't ask, some even fill two days and two nights, I used it for a long time, electric car lithium ion The battery pack life will be threatened. If over charge can result in a large amount of gas flush electrode plate, it causes the internal active substance to fall off, shorten battery life, so that the battery is in vainable, affecting the decomposition of the electrolyte, so that the battery temperature increases, make it Drug! The valve hole is blocked, enhances the internal gas pressure causes the battery case to deformed, and the split is swollen. 4, forget the charger with charger, just borrow one, or a family of several electric car size chargers, this is very common, each electric car battery brand has its own interface, current value, different electric The car may have different charging voltages, the charging current is different, the natural charging time and charging efficiency are different, and the charger, the battery is large, the charger is small, the charge is low, the battery is small, the charger is large, the charging, the heat is out of control, will be drumming.

The above is the cause analysis of lithium-ion batteries, batteries, electric vehicle battery drums. Safety problems of the iron phosphate battery pack have been the topic of people's continued attention, although lithium-ion battery technology is constantly improving, but safety hazards still exist. The safety performance of the battery has no better lithium-ion battery pack.

If there is a phenomenon of drum bag during use in the use of lithium-ion battery packs, small-series is recommended to replace the battery, after all, the most important. The voltage is lower than 3V, first perform precharge, the charging current is 1/10 of the set current, and the voltage rises to 3V, enter the standard charging process. The standard charging process is: When the current is constant, the battery voltage rises to 4.

20V, change to constant pressure charging, keep the charging voltage of 4.20V. At this time, the charging current gradually decreases, and when the current drops to 1/10 of the set charging current, charging ends.

This is a process of a general lithium-ion battery charge, if the lithium ion battery exists in a smart device, its charging mode will be controlled by intelligent device software.