2023.09.19 Customer Annual Factory Audit_Industry Trends_News & Events

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October 11,2023

test auto fuse with multimeter.The application of self recovery fuse in rechargeable battery pack

　　　　1. The application of self recovery fuse in rechargeable battery pack　　1) Problem and Analysis: NICD, NiMH, and Li-ION are commonly used in special protection circuits for mobile phones and computers. The reasons for these battery pack failures are usually: unexpected short circuit between the positive and negative terminals; The charger cannot stop charging a fully charged battery; The polarity of the wrong charger or battery is reversed. Installing the PTC patch series in series in various units of the battery pack can provide overcurrent and over temperature protection for the circuit.　　2) Protection requirements: In the event of a malfunction, the voltage of the mobile phone can reach 16V, and the voltage of the computer can reach 24V; Its current can reach 100 amperes. In overcharging conditions, the battery pack needs to be protected against overheating. NiCD batteries cannot exceed 120C, and NiMH and Li Ion batteries cannot exceed 90C.　　The ultra small package (0402 specific

July 14,2023

Current fuse LEBAO.fast blow vs slow blow fuse

　　　　Rated voltage　　The nominal working voltage of a fuse, codenamed Un, is generally rated at 32V, 60V, 125V, 250V, 300V, 500V, 600V, and 1200V. Fuses can be used at a voltage not exceeding their rated voltage, but are generally not approved for use in circuits with a circuit voltage greater than the rated voltage of the fuse.　　Voltage drop　　When the rated current is applied to the fuse, the voltage measured at both ends of the fuse when the fuse reaches Thermal equilibrium, that is, when the temperature is stabilized, is Ud. Due to the voltage drop at both ends of the fuse having a certain impact on the circuit, there are clear provisions for voltage drop in European regulations.　　Fuse resistance　　Usually divided into cold resistance and hot resistance, cold resistance is the resistance value measured by a test current less than 10% of the rated current at a fuse temperature of 25 ℃. The thermal resistance is converted from the voltage drop measured at the full rated current value as

August 15,2024

Application of PPTC Thermistor in Batteries

　　　　Compared with NiMH or NICd batteries, lithium-ion batteries have a higher current density and are widely used in various portable devices.　　Lithium ion batteries are usually very sensitive to overcharging. When the voltage at both ends of the battery is too high during charging, it will increase battery leakage　　The danger of smoking, burning, and bursting (which is often quite severe). Overcharging may be caused by uncontrolled charging, electrode errors, or　　Caused by using an incorrect charger. When the charging and discharging current of lithium-ion batteries is too high or there is an external short circuit, internal heating may damage the battery or burn other components, seriously shortening the battery's cycle life.　　The task of protecting the circuit is to monitor the parameters of the battery's charging and discharging status in response to various possible faults, in order to ensure battery life and efficiency, and to prevent damage to the battery and external devices su

July 18,2023

Automotive fuse box.15a pptc fuses

　　　　Car fuse box is a box used to install car fuses. According to the size of the installed fuse, it can be divided into: small car fuse boxes; Medium size car fuse box; Large car fuse box. General injection molding materials include: PBT engineering plastics, each with varying degrees of high temperature resistance. When selecting a car fuse box, consideration should be given to the current size of the car fuse used, the size requirements of the fuse, and the selection of different fuse boxes. The English translation of automotive fuse box is:　　Classification of automotive fuse boxes:　　According to the classification of installed fuses, they can be divided into fuse box and fuse box　　According to the size of fuses, they can be divided into large fuse boxes, medium fuse boxes, and small fuse boxes　　According to material classification, it can be divided into plastic fuse boxes and bakelite fuse boxes　　According to environmental protection, it can be divided into environmentally friendl

July 05,2023

Basic composition of fuses.how to test a refrigerator bimetal thermostat

　　　　A general fuse consists of three parts: one is the melt part, which is the core of the fuse and plays a role in cutting off the current when blown. Fuses of the same type and specification should have the same material, geometric size, resistance value as small and consistent as possible, and the most important thing is to have consistent fusing characteristics. Household fuses are commonly made of lead antimony alloy; The second is the electrode part, which usually has two important components that connect the melt to the circuit. It must have good conductivity and should not generate obvious installation contact resistance; The third part is the support part. The melt of the fuse is generally thin and soft. The function of the support is to fix the melt and make the three parts a rigid whole for easy installation and use. It must have good mechanical strength, insulation, heat resistance, and flame retardancy, and should not produce phenomena such as breakage, deformation, combus

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2023.09.19 Customer Annual Factory Audit

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2023-09