Who knows the dangers of overcharging and overdischarging lithium batteries?

Introduction Does anyone know the dangers of overcharging and overdischarging lithium batteries? Whether overcharging and continuing to charge when the battery is full leads to structural changes in the cathode material, resulting in loss of capacity and its component

Who knows the dangers of overcharging and overdischarging lithium batteries?

If the lithium battery is overcharged, continuing to charge when the battery is full will cause the positive electrode material structure to change, resulting in loss of capacity and its decomposition to release oxygen. and the electrolyte will be produced. Of violent chemical reactions, the worst result is naturally an explosion.

After the lithium battery discharges the internally stored energy and the voltage reaches a certain value, continued discharge will lead to over-discharge. The discharge cut-off voltage is generally determined based on the discharge current.

Working principle of lithium batteries

Lithium metal batteries: lithium metal batteries generally use manganese dioxide as the positive electrode material, lithium metal or its metal alloy as the negative electrode material and use an electrolytic solutione non-aqueous. Discharge reaction: Li+MnO2=LiMnO2.

Lithium ion battery: Lithium ion battery generally uses lithium alloy metal oxide as the positive electrode material, graphite as the negative electrode material, and non-aqueous electrolyte.

Lithium batteries are rechargeable batteries. Typically, lithium batteries are fully charged at 4.2 V. There are also batteries with other voltages. Lithium battery charging methods include fast charging, slow charging, trickle charging, constant current charging, etc. But be careful to avoid overcharging, overdischarging, short circuit protection and other problems with lithium batteries.

How much damage will overcharging and overdischarging lithium batteries cause to the battery?

If the lithium battery is overcharged, continue charging when the batteryttery is full will cause the positive electrode material structure to change, resulting in loss of capacity, and its decomposition of oxygen and electrolyte will cause a violent chemical reaction, and finally The bad result is of course a blast.

After the lithium battery discharges the internally stored energy and the voltage reaches a certain value, continued discharge will lead to over-discharge. The discharge cut-off voltage is generally determined based on the discharge current. The general setting for 0.2 C to 2 C discharge is 1.0 V/piece, and the setting for discharge above 3 C, such as 5 C or 10 C, is 0.8 V/piece. Excessive battery discharge can have catastrophic consequences on the battery, especially large current. excessive discharge or repeated overdischarge has a greater impact on the battery.

In a general wayeral, excessive discharge will increase the internal pressure of the lithium battery and destroy the reversibility of positive and negative active materials. Even if it is charged, it can only be partially restored, along with its capacity. will also be significantly reduced. If the lithium battery is deeply charged and deeply discharged, the battery loss will be greater. The ideal working state of the lithium battery is shallow charging and discharging, in which case the battery life will be longer.

Why does gas appear when a lithium battery is overcharged or overdischarged?

Ordinary lithium-ion batteries will produce a small amount of gas inside the battery during the charging process, which is usually absorbed during discharging. Too large charging current and frequent overcharging will aggravate gas production, increase pressuren internal part of the lithium battery and will cause swelling. A slight bulge of the battery is allowed. Avoiding overloading is the key to reducing the bulge.

In addition, the chemical properties of lithium are very active and easy to burn. When the lithium battery is charged and discharged, the temperature inside the battery continues to rise. The gas generated during the activation process expands. and the internal pressure of the battery increases until the pressure reaches a certain level. It will rupture to a certain extent, causing leakage, fire or even explosion, so it is absolutely important to ensure its safety performance.

  • Popular Focus
  • Where is the cheapest battery wholesale?

    Where is the cheapest battery wholesale in Tangxia, Sanyuanli, Baiyun District? There is an enterprise specializing in the independent production of electric vehicles in Tangxia, Sanyuanli, Baiyun District, Baiyun Sanyuanli Avenue, Baiyun Sanyuanli Street
    08-02
  • Four 3.7V lithium batteries in series and parallel produce 7.4V/4.4A. How to reduce it to 4.8V/4.4A?

    Four 3.7V lithium batteries in series and parallel produce 7.4V/4.4A. I personally think it is impossible to reduce it to 4.8V/4.4A. Because the discharge platform of lithium batteries is generally set
    08-10
  • What are the materials of the negative electrodes of lithium batteries?

    What are the materials of the negative electrodes of lithium batteries? The main commercial applications of lithium batteries include graphite, which is a sheet of copper used to guide current and which does not react. another safe
    08-02
  • The difference between 18500 and 26500 batteries

    What is the difference between 18500 and 26500 batteries? The answer above is 18650. The person asking the question should ask what is the difference between 18505 and 26500 batteries. In the case of Fuant ER1
    08-02
  • What does 3.7V 80mAh written on a lithium battery mean?

    What does 3.7V 80mAh written on a lithium battery mean? 3.7 V, 80 mA = 0.08 A, H means 1 hour, or 3600 seconds. Taken together, it is
    08-02
  • How long does a lithium battery (cell phone battery) last?

    How long does a lithium battery (cell phone battery) last? The lifespan of mobile phone batteries, under normal conditions of use and without serious impact, the lifespan set by the manufacturer must be 5 years.
    08-02
  • Will lithium batteries explode when charging?

    Will lithium batteries explode when charged? Will lithium batteries explode when charged? Lithium battery explosions usually occur during the charging process, because the negative electrode material of lithium batteries is graphite or other carbon materi
    08-02
  • Parameters of lgdas31865 lithium battery

    Parameters of lgdas31865 lithium battery The parameters of lgdas31865 lithium battery are as follows: LGDAS31865 is a model 18650 lithium battery with a capacity of
    08-02
  • What are the main components of lithium battery electrolyte?

    What are the main components of lithium battery electrolyte? The composition of lithium battery electrolyte is shown below. 1. Ethylene carbonate: molecular formula C3H4O3. Colorless transparent liquid (>35℃), room temperature
    08-02
  • Who are the lithium battery manufacturers in Shandong?

    What are the lithium battery manufacturers in Shandong? Shandong Shengyang Power Supply Co., Ltd. and Shandong Weineng Environmental Protection Power Technology Co., Ltd. 1. Shandong Shengyang Power Supply Co., Ltd. is located in Shengyang, Qufu City.
    08-02
  • Types of drone batteries available in 2024

    Part 1. Types of drone batteries available in 2024In 2024, drone batteries have advanced significantly, offering a range of options to cater to various needs in
    07-30
  • How long does it take to charge 26650 battery?

    How long does it take to charge a 26650 battery? The charging time for a 26650 battery is generally between 3 and 6 hours, but the precise time depends on the power of the charger and the capacity of the battery. in general
    08-02
  • For what?Sure, here's an article based on the phrase "For what?

    The simple yet profound question, "For what?" often serves as a gateway to deeper reflections on purpose and intention. It is a query that invites us to delve into the reasons behind actions, decisions, and circumstances that shape our lives and the wor
    08-02
  • Choosing the Right Cart Battery

    This comprehensive guide will walk you through everything you need about cart batteries, from understanding different types to making an informed purchase decision.
    08-02
  • 30mAh~500mAh 3.7 V Li-ion Battery

    Welcome to Ufine's collection of 3.7V lithium-ion batteries ranging from 30mAh to 500mAh. Explore a diverse range of compact and lightweight batteries suitable for various electronic devices,
    08-02
  • Here are 10 essential facts about drone batteries for 2024.

    10 Key Facts About Drone Battery for 2024 In 2024, drone batteries have advanced significantly, offering a range of options to cater to various needs in the consumer, commercial, and industrial sectors. Below are the primary types of drone batteries avai
    08-02
  • Could you please explain the difference among IMR, ICR, INR, and IFR 18650 batteries?

    What is the Difference Between IMR, ICR, INR, and IFR 18650 Battery?In 18650 batteries, discerning the differences among IMR, ICR, INR, and IFR types is fundamental for tailored and efficient battery usage. These distinct
    08-02
  • Safety considerations for cart batteries

    Selecting the ideal cart battery is crucial for ensuring optimal performance and longevity of your electric vehicle or vaping device. This comprehensive guide w
    08-01