Can You Charge A 48v Battery With A 12v Charger
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I built my own diesel car, but I couldn’t let the battery fully charge. I use four 12V batteries as 48V batteries and I use 3 solar panels. Each has 19V, 18V in the morning and evening, and 20V in the afternoon. Can be ordered quickly. I get 5.5A during the day. The battery is 48V 32Ah. This is a big job. He can run 15 km per day using free energy.
Can You Charge A 48v Battery With A 12v Charger
But it seems that the battery cannot be fully charged. Should I add solar panels? Can I use 76V or 72V to charge a 48V battery?
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Since you didn’t mention battery drain, I assume you’re talking about lead acid batteries. If not, you have some constant attack strategy.
But there are two things you need to understand: the charging current is equal to the voltage difference between the output panels and the battery voltage, the charging voltage for a single battery is about 15.5-16V, in your case 64V. Total.
Therefore, your solar array cannot reach the battery to charge, this explains why it is not good to charge your battery.
On the other hand, 4 panels is a higher voltage for your battery pack, and therefore you need to change your PV voltage to 64V DC to get the correct charging time (ie to fully charge).
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This is the most important way to do it. In home/commercial PV installations, maximum efficiency is desirable. In this case, you will implement a maximum power protection scheme (MPPT) in your power conversion system. It will ensure that the maximum power is taken from the PV regardless of the voltage / current, and the mode is changed to the required voltage in the second phase (in your case 64V). But this work is more difficult. You may want to check this out for future updates.
What I recommend is to find a good 76V to 64V regulator (or close to it), connect the solar panel to one end, the battery box to the other, and that does the trick for the PV array.
But be careful and do your homework before trying anything that could damage your car, yourself or others. Fire is sometimes overlooked when working with electricity. 48V lithium batteries have many applications in real life, such as home energy storage systems, mobile phones, data center backup power supplies, etc. So what is a 48V lithium battery? BSLBATT has collected and classified some information about 48V lithium battery, and will give you complete information 48V lithium battery!
48V lithium ion battery can be divided into ternary lithium battery, lithium iron phosphate battery, lithium titanate battery based on the good electrode material. For example, the voltage of a single lithium iron phosphate battery is 3.2V, we can add 16 similar modules in series to get a 48V lithium battery.
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Off-grid solar systems have actually been around for a long time, and conventional solar systems are the largest of all 12V batteries. We have many customers asking whether all our systems have 24V or 48V batteries because they use 12V batteries as a source for RV outboards- grid and buildings.
For small systems, we can get the efficiency of 12V lithium batteries, but for medium and large projects, customers switch to 24V or 48V batteries for a more economical configuration.
High voltage battery packs mean they can support larger solar panels. In home energy storage systems, 48V lithium batteries can accept higher charging loads than 12V and 24V lithium battery packs, saving charging time.
The only batteries available on the market are around 3.7v, but in many cases the batteries used are too large and there is clearly a shortage problem. Now, to increase the electric power, battery packs and modular electric panels come, and in many high-end electric panels, 48v lithium-ion batteries are often used.
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Compared to lead-acid batteries, 48V lithium-ion batteries have the advantages of small size, light weight, ability to change temperature, high charging and discharging efficiency, safe and stable, long life, energy saving and environmental protection.
48V lithium ion batteries can be divided into ternary lithium batteries, lithium iron phosphate batteries, lithium titanate batteries according to the cathode material.
The 48V lithium ion battery is made by connecting several lithium cells by connecting them in series and vice versa because the quality and life of the battery is not good if the operation One cell is a 48v lithium battery.
The price of a lithium battery x (3.2 ~ 3.7V * n = 48v) * m (the number of cells in the same) + the price of the protective plate + the price of the shell + the price of general auxiliary equipment. will vary due to different materials and processes used in the manufacture of lithium battery devices.
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The 48V lithium-ion battery protection board, that is, the circuit board plays a protective role. Mainly composed of electronic circuits, it can accurately monitor the battery cell voltage and charging and discharging process at any time in the environment of -40 ℃ and + 85 ℃ and regulate the current on / off. cycle through time.
The Li-ion battery protection board can play the role of storage and discharge for series and parallel battery groups, and at the same time can detect over-voltage, over-current, over-temperature, under-voltage and short. The position of each battery in the battery extends the life of the battery and prevents battery damage due to discharge. The lithium protection layer is very important in lithium batteries.
The 48V Li-ion Battery Management System (BMS) determines the status of the entire battery system by detecting the status of each cell in the Li-ion battery pack and performs appropriate power adjustments and plans for the Li-ion battery system based on its own. . position to carry out the management and discharge of the Li-ion battery system and each cell to ensure the safe and stable operation of the Li-ion battery system.
● Lithium ion battery management system consists of a control unit (CPU), voltage and temperature sensor, current module and interface module.
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● It can detect and display total voltage, total current and storage capacity of lithium ion batteries; single cell voltage and battery temperature; maximum and minimum battery voltage and battery capacity, maximum and minimum voltage, and maximum charge and discharge of the battery pack.
● lithium ion receiver also provides alarm and control output for overvoltage, undervoltage, high temperature, low voltage, overcurrent, short circuit and other limit conditions.
● RS232 CAN bus interface is available to read all the information about the Li-ion battery management system in the computer.
1. lithium-ion battery can be stored for a long time without being used, it must be maintained at 50%-60% state of charge, it must be recharged once every 3 months, and must be charged and discharged once every six. month.
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2. During transportation, care must be taken to prevent moisture and humidity, and avoid protrusion and mixing to prevent damage to the lithium-ion battery.
3. At low temperature, it should not be less than 0 ° C. Keeping it at a temperature of 5 ° C to 10 ° C is better.
4. Prohibit the use or installation of lithium-ion batteries at high temperatures (hot sun or very hot cars), otherwise the battery will be overheated, fire or damage, life will be short.
5. Forbid putting it in a place with strong static electricity and strong magnetic field, otherwise it will easily destroy the battery’s security protection, which will create hidden problems.
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6. If the lithium-ion battery produces odor, heat, discharge, deformation, or damage during use, storage, or If there is no warranty, immediately disconnect the battery from the device or charger and stop using it.
7. In the case of lithium-ion batteries, the monthly capacity can be 3% to 5%. The self-emission is temperature dependent and is higher as the temperature increases.
8. Discharge means “squeezing” the battery until it no longer produces current. Press another current. In this case, the voltage will drop to 0 volts. If this condition is maintained. Chemical changes can occur in the battery electrodes, making them partially or completely useless.
9. The lithium-ion battery can be used at a temperature of 10 ° C to + 55 ° C. However, it can be stored at a battery temperature of +5 ° C to +45 ° C.
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With modern home power storage systems, you can choose between two battery technologies: battery-acid and lithium-ion. What you choose depends on your personal preference. Both techniques have their advantages and disadvantages.
Currently, the total energy of lithium batteries is 200 ~ 260wh / g, while lead acid is 50 ~ 70wh / g. from
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