How Does the Lithium Battery Double-sided Spot Welder Work? The double-sided spot welding machine for lithium battery pack is developed on the basis of single-sided spot welding machine. It is suitable for welding various lithium battery spot welding machines, fully realizing one machine for multiple purposes. How the double-sided spot welder for lithium battery pack is realized, and its working principle is revealed for you. Working principle of double-sided spot welder for lithium battery pack Double side spot welding machine. During the development of spot welding equipment, battery spot welding equipment can be customized according to the production process and welding requirements of users. There are many types of XY axis spot welding machines, double-sided spot welding machines and single head spot welding machines for welding lithium battery packs. Double side spot welder is developed on the basis of single side medium frequency spot welder. First, you need a workstation. Such a workstation is required for welding of some parts. The second part is the requirements for purchasing lithium battery assembly and processing equipment. The premise is that the transformer of intermediate frequency spot welding machine must have a load rate greater than 50%. The dual station intermediate frequency spot welding machine uses a group of main control transformers and a group of controllers to work between the two stations, and must have self-locking features. Medium frequency spot welding machine adopts high-performance pneumatic components. The winch and guide shaft are chrome plated, and the transmission pressure is flexible and reliable. The secondary interior of the welding transformer is cooled by water. It adopts optimized design, high permeability materials, low no-load loss, strong and stable power output, and long service life. Microcomputer controller control, multi standard welding, double pedal, double pulse, double current control, thyristor temperature monitoring and multiple protection functions. The main circuit is controlled by two-way water-cooled thyristor to ensure balanced and reliable current output. The medium frequency spot welder adopts a dual station design, which is suitable for the welding of various lithium battery spot welders, fully realizing one machine for multiple purposes. Acey new energy is a professional supplier of both manual spot welding machine and automatic welding machine. Welcome to contact us for more details.

Discharge C Rate and Correct Charging and Discharging Method of Polymer Lithium Battery Polymer lithium battery is a kind of soft packed lithium battery with gel electrolyte, also known as pouch lithium battery. For the new polymer battery, since the battery will automatically enter the sleep state after being placed for a period of time, the capacity of the polymer battery is very low at this time, and it will also affect the shortening of the service time of the battery. Charging and discharging methods of polymer lithium battery 1. Discharging The discharge current of polymer lithium battery shall not exceed the following standards, and the discharge must be carried out within the scope of this standard. The discharge current of single cell must be less than 2C5A. The temperature range of polymer lithium battery discharge is - 20 ~ + 60 ℃. The discharge termination voltage of single cell shall not be less than 2.75V. 2. Charging The charging current and voltage of the polymer lithium battery shall not exceed the following standards. If the specified value is exceeded, the charging and discharging performance, mechanical performance and safety of the battery cell may be damaged, and heating and leakage may be caused. The polymer lithium battery charger must be able to charge at constant current and voltage. The charging current of the single battery during charging must be below 1C5A. The temperature range during charging is 0 ~ + 45 ℃. When the polymer lithium battery is charged, the voltage shall not exceed 4.23V. Discharge C rate of polymer lithium battery: C: It is used to represent the ratio of battery charge and discharge current, i.e. magnification. For example, for a 1200mAh battery, 0.2C indicates 240mA (0.2 magnification of 1200mAh), and 1C indicates 1200Ma (1 magnification of 1200mAh). The charge and discharge efficiency is also related to C (rate). Under the condition of 0.2C, the charge and discharge efficiency of polymer lithium battery should be 99.8%. Correct charging and discharging mode of polymer lithium battery: Charging: the charging and discharging of polymer lithium batteries and liquid lithium batteries are actually the same. There are mainly two ways of constant voltage charging and constant current charging, which can also be carried out alternately. In constant current charging, the capacity of the battery increases with time, and the internal resistance of the battery also increases constantly, so the charging becomes slow. At this time, we should not think that the charging is complete, but it will take a period of slow charging. While the manufacturers of general polymer lithium-ion batteries first use constant current to charge the batteries, and then use constant voltage current to charge the batteries. Current, voltage and cell phone power are all changing with time, which ensures that the cell phone's battery can be fully charged quickly. Discharge, we all know that as long as we turn on the mobile phone, we ar...

The Aspects of Lithium Coin Battery Safety Testing Lithium button battery is a battery with unique shape and size. The whole shape is like a small button. However, no matter what type of battery, it needs to be tested for safety. The button battery has no exception. Here let’s introduce the general aspects of the button battery safety tests. The test content includes: vibration, squeeze, acupuncture, overcharge, short circuit, drop, heating, heavy object impact, etc., then connect. In the following, will briefly talk about the specific test content of overcharge test, short circuit test, needle test, squeeze test, and heavy object impact test. Button battery overcharge test: First, fully charge the button battery, and then overcharge according to 3c to conduct an overcharge test. If the voltage of the battery rises to a certain voltage when the battery is overcharged, we will stabilize for a period of time, and then increase the voltage of the battery rapidly when the time comes. At this time, the voltage of the battery has risen to a certain limit. The top hat of the battery is broken and the voltage drops to 0V. The battery can pass the test without fire or explosion. A coin cell tester is necessary for this process. Button battery short-circuit test: After the button battery is fully charged, the positive and negative electrodes of the battery are short-circuited with resistance wires. ACEY battery short circuit test chamber can finish this test. Acupuncture test of button battery: Place a fully charged battery on a flat surface and pierce the battery with a steel needle with a diameter of 3mm in the radial direction. The test battery can pass the test without fire or explosion. Squeeze test of button battery: Place the fully charged battery on a flat surface, apply a certain squeezing force by the hydraulic cylinder, and then squeeze the battery by the plane of the steel rod. Once squeezed, the pressure reaches the maximum value. Stop squeezing, if the battery does not catch fire, just don't explode. Button battery heavy object impact test: After the battery is fully charged, place it on a flat surface and use a steel column to vertically place the center of the battery. If a certain weight of weight falls freely on the steel column above the battery, if the battery is still It can pass the test if it catches fire or does not explode. Overcharge test, short circuit test, acupuncture test, squeeze test, and heavy object impact test are all test contents of button battery safety test. If these test items can be carried out meticulously, the quality of button battery will be greatly improved. This also guarantees the normal use of button batteries Acey new energy can provide professional battery environment testing equipments. Welcome to contact us for more products.