How to use lithium batteries correctly (how to use lithium batteries correctly in electric vehicles)
The development of green new energy depends on the progress of science and technology. While the development of science and technology brings convenience to people, it is necessary to take into account green environmental protection and protect the environment. Youyuan Lithium-ion battery, as the leader of the new energy industry, is widely favored.
However, due to the improper use and operation of lithium batteries, explosion accidents of lithium batteries occur frequently. How to use lithium batteries correctly to reduce the accident rate of lithium batteries?
The lithium battery itself is an energy storage device that converts electrical energy into chemical energy, while the power battery pack connects more batteries in series and connected in parallel to form a larger energy storage body.
Because the battery pack is an energy source, unsafe use may cause the danger of explosion or combustion, so why would it explode or burn? It is due to the “thermal runaway” inside the battery pack, that is, the abnormal use of the lithium battery or various internal and external reasons destroy the normal balance between the electrodes, resulting in additional heat generated by the electrochemical reaction that accumulates inside the battery and cannot be released normally, resulting in explode or burn. The main causes of out-of-control heating are short circuit, overcharging, reverse charging, storage under high temperature or high humidity, water entering the battery pack, etc.
Smart lithium battery
What should be paid attention to in daily use of lithium battery?
1. Prevent the battery pack from being broken or damaged: During assembly or use, prevent the various wires of the battery pack from being pulled, scratched, squeezed, or exposed to high temperatures by abnormal external forces. If the function of the battery pack fails, the hidden danger of the damaged part will easily form a short circuit with the outside world;
Second, prevent the battery pack from being impacted by external forces: During assembly or use, it is necessary to prevent the battery pack from being severely impacted by violent external forces. Damaged or deformed, the terminals are welded off, which makes the function of the battery pack invalid, and the hidden dangers of the damage can easily lead to internal damage of the battery cell;
Third, prevent the battery pack from being pierced by hard objects: during assembly or use , it is necessary to prevent the battery pack from being pierced by external hard objects into the body, damaging the internal components or protective film, the function of the battery pack will fail, and the hidden dangers of the damaged parts will easily lead to battery cell failure or short circuit;
Fourth, prevent the battery pack Skin damage: During handling, assembly or use, it is necessary to prevent the protective film on the surface of the battery pack from being scratched, punctured by external force and exposed to high temperature. After the skin of the battery pack is damaged, the protective ability will be reduced, which will easily lead to the entry of foreign objects or water;
5. Short circuit or reverse insertion of the battery pack: When using, prevent the output port of the battery pack from being short-circuited by the outer conductor or electrical appliances. The input port of the battery is reversely inserted into the output port of the battery; otherwise, the function of the battery pack will fail, and the hidden danger of the damage will easily lead to combustion or explosion;
6. Charging precautions: (1) Check the charging head Whether the orientation is broken. If the charging head is directional, pay attention to the direction of insertion and removal, and whether the contact shrapnel on the surface or inside of the charging head is severely worn. The impedance of the damaged part is easy to increase, and it is easy to cause the battery to be insufficiently charged or burn out here; (2) prevent the battery pack from beingCharging under abnormal voltage. During the charging process, prevent the original charger from being used in an unstable power supply system or use a non-original charger; (3) In the case of abnormal voltage, charging the battery pack may easily cause combustion or explosion; (4) Prevent the battery pack from reversing To charge. When charging, it is necessary to prevent the output port of the charger from being inserted into the battery pack, and the charging input port of the battery pack from being plugged into the charging interface, so that the function of the battery pack will become invalid, and charging the battery pack may easily cause combustion or explosion; (5) Charging must use a special charger for lithium batteries. Due to the material system of lithium batteries, overcharge, overdischarge, overcurrent, short circuit, etc. The battery of Liyouyou Resource Network can easily affect the performance and life of the lithium battery, and even pose a serious safety hazard. Therefore, the charger has high requirements for lithium batteries (it is better to have an original lithium battery charger). The lithium battery special charger has a built-in high-precision control chip, which can charge the lithium battery with constant current and constant voltage. (6) Charge in time when the power is off: avoid charging after the lithium battery is undervoltage, and avoid charging for a long time. Lithium batteries should be charged as lightly as possible, which can greatly improve battery performance and life; (7) Do not charge in harsh environments such as ultra-high, low-temperature environments, and humidity (requirements for charging temperature of lithium batteries: 0-40 degrees), after each charge Cover the charging port of the lithium battery to avoid long-term exposure to humid environment, which will cause the charging port of the lithium battery to oxidize and rust, which will affect the charging efficiency and safety; Plug to prevent the charger and management system from being in standby for a long time, affecting battery life and causing other hidden dangers;
Seven, discharge precautions: check whether the charging and discharging interface of the battery pack is damaged , Check whether the metal of the discharge socket is damaged, check whether the charging port and the discharging port are damaged, oxidized or even burned during use or charging. If it is damaged, the impedance of the damaged place will easily increase, which will easily cause the battery not to discharge or heat up here;
Eighth, put aside the precautions: the battery pack needs to be charged in time, and the battery protection board and the battery itself will consume Electricity. If the battery is not suitable for use for a long time, it needs to be charged regularly, and the battery pack will have low voltage protection. In severe cases, the battery will consume power to 0V, causing the protection board to prohibit charging.
Ninth, prevent water from entering the battery pack when not in use. During use, it is necessary to prevent the battery pack from being exposed to external rainwater for a long time or the battery is soaked in water, otherwise the function of the battery pack will fail, and the contact terminals will fail after accelerated aging.
Tenth, prevent the battery pack from being used or stored at high temperatures. During use, it is necessary to prevent the battery pack from being placed in an environment with abnormal temperature or exposed to direct sunlight for a long time, otherwise the battery pack may fail, and the internal chemical structure of the battery cell is easily damaged at high temperature.
Eleventh, the lithium battery or charger will automatically stop charging after the battery is fully charged, and does not need the so-called “trickle” charging of the lead-acid battery. Although both the lithium battery and the charger have overcharge protection, the lithium battery is charged for a long time, making it on the verge of overcharging for a long time. If the overcharge protection fails, the consequences will be disastrous. Therefore, it is recommended to charge the battery in an open space outside during the day, and then unplug it when it is fully charged.
Twelve. Lithium battery storage. When the lithium battery is not used for a long time, the lithium battery should be disconnected from the vehicle, and the lithium battery should be charged once every 60 days to avoid excessive discharge of the lithium battery caused by the self-discharge of the lithium battery or the power consumption of the protection board, which will affect the service life of the lithium battery . Even if the current lithium battery can protect against rain, it is only waterproof for a short time. If left in a humid environment or in water for a long time, water may enter the battery through the outlet, etc. Once the lithium battery, battery management system and electrical components on the vehicle enter water, it may cause short circuit damage to the lithium battery and system components, causing other safety hazards.
Using safe lithium battery electric vehicles requires developing good habits to ensure the performance and life of electric vehicles. While electric vehicles are convenient for us, they also need our normal maintenance.
The above are the precautions for the safe use of lithium batteries provided by Vichy Power.