Condition:New
Type:Logic ICs
Model Number:S350-27
This power supply is a personal modified product, a second-hand disassembled switching power supply, and the voltage and current can be adjusted. The multi-turn potentiometer has high precision, and the translucent panel is high-grade and exquisite. Constant voltage and constant current, short circuit protection, overheat protection, temperature control fan, stable performance. Small size, light weight, easy to carry. Mainly applicable: all kinds of car, electric car battery, lithium battery charging, car DVD player, radio, audio power supply, notebook, router, optical cat, hard disk box, TV box, LCD power supply, power bank, mobile phone charging, also suitable for For DC equipment, DC motor stepless speed regulation, LED stepless dimming, chemical electrolytic plating, various maintenance, scientific research and testing, learning experiments, electronic instruments, etc.
Disclaimer
This power supply is a second-hand disassembly and modification, there may be slight appearance defects, scratches, etc., please be aware!
Common charging parameters：
common problem:
1. What is the size of the power supply? How much? Answer: volume 26*1.5*5cm, weight 1200g
2. Is it constant voltage and constant current? Answer: Yes
3. Can you charge the bottle? Can you charge lithium batteries? Answer: can be charged
4. Why can't the current be adjusted after receiving it? Answer: The current needs to be displayed after the load is connected.
5. Why is the current not adjusted much? Answer: The current adjustable size is related to the power of the load device.
6. How to judge whether the current is normal? Answer: Adjust the voltage to 3V, short-circuit the positive and negative poles of the output, and adjust the current.
7. Can it be used without grounding? Answer: It is recommended to use grounding for metal shell equipment.
8. Why does the fan not turn after receiving it? A: The fan is temperature controlled at about 50° to start.
9. How to calculate the current? Answer: The rated power of the power supply is 450w, which can be based on 450w ÷ voltage V = current A. For example, to use 72V. 450÷72=6.25A. If the capacity of the tram is 20AH, the limited current is 20AH*0.2C=4A.
10. Does the charging stop automatically?
Answer: There are two kinds,
Case 1. Lithium battery, stop after charging to the voltage of the protection board. Deliberately lowering the voltage "trickle maintenance" refers to the use of trickle charging, that is, charging with a small current after the battery is fully charged, so that the electrons can keep flowing and prolong the battery life. (For example, 54.6V can be set to 54 to keep the protection board non-stop, 3a, 2a, 1a, 0.5a such trickle maintenance)
Case 2. Batteries, the charger is overcharged due to high voltage. Adjustable chargers can be avoided. For example: the charging voltage of 48v battery is 57.6v according to 14.4v*4, as for this problem of full stop. It is equivalent to you setting 56v. When the battery is charged to the set voltage, the current is 4A when it is less than 56v. After charging to 56v, the current will gradually decrease to 4A, 3A, 2A, 1A, 0.5A, 0A for trickle maintenance.
Technology and Specifications
Power supply model: MWS-350-27/0-95-8
Rated power: 450W
Input voltage: 220/110Vac
Input interface: national standard three-hole plug
Output adjustable: DC0-95V/0-8A
Output interface: red and black 4mm binding posts
Current usage instructions: 0-50V8A, 50-60V7A, 60-75V6A, 75-80V5A follow 450w÷voltage=current
Note: When using more than 50V, adjust the voltage, adjust the current and gradually increase the power after connecting to the load, so as not to exceed the power
? Please use grounded
Digital meter: red shows voltage, blue shows current.
The charging rate of iron-lithium and lithium batteries is to check the parameters of the battery cells. The number of strings increases, and the charging voltage is multiplied by the number of strings. For example, the charging voltage of 3.7V*12V lithium battery is 4.2*3=12.6V, and the current remains unchanged: when 3 batteries are connected in parallel The formed string charging current is also multiplied by 3 accordingly. It can also be charged at a speed of 0.2C.
For batteries, for example, the theoretical charging voltage of a 12V20AH battery is 12V*1.2=14.4V, and the current is 20AH*0.2c=4A. The actual battery life is considered: the voltage of 13.8-14.2 is slightly lower than the maximum voltage, and the current is 3-3.5A.
Therefore, the adjustable power supply is independent and controllable. It is not a finished charger sold on the market. The 12V charger is made into 168V. The high voltage can indeed improve the charging speed, but the battery is damaged faster.
