Super capacitor balancing plate, is also known, super capacitor is a voltage charging limit, then a stupid answer is nothing more than the answer, the truth is the case? You can try, I think your home, if you fry a 3000F capacitor, the whole room is smoke,
remember! ! ! ! The super capacitor is absolutely absolute absolute absolute absolute.
Why is some electric vehicles unveiled from endless explosion? ? The BMS power management system has a problem, then most of the problems are there, what is the commonality? It is basically charging.
Some electric vehicles are now highlighted, and some use super capacitors. However, the Chinese will save materials, and will cost the cost. It is true that there are some chaos that Chinese companies currently exist.
Below is a 18 string supercapacitor regulator (some people call it balance board, protective board)
Various named methods, but the change is not from its truth, the role is to balance the voltage, over charge and discharge protection,
First of all, it is positive
Below this picture is the back
Then there are some details, from our map, we can see some components of this board, then I will tell you this protector today.
First, if you understand some of the circuits, you can see that the circuit of the figure below is divided into a balanced circuit with signal circuit.
Then, the equalization circuit portion can be independent, that is, the 18 sets of modules of this panel controls 18 capacitors. They can be cut separately, as a separate protective plate, then the signal portion, the signal portion can be substantially No, some people look at the optocoupler, and the isolation signal is also given to the charger signal. That is to say, there are two groups compared to this voltage, that is, two roads, the original equilibrium version is If you are not using a special supercapacitor charger, this signal circuit is useless, that is, a simple use of equalization circuit, but us in seeing their balanced version with light this board, then this How can I solve it? It doesn't matter, look down,
So how do this group work, the entire circuit can be divided into a benchmark - compare ---- Drive --- Discharge - notice, to the voltage to inform two 18R0 discharge, but now if you are just Simple and several capacitors, such as two and three strings, do not have problems in the car, do not require signal circuitry at all.
Need to pay attention before cropping:
Creating the power supply of the entire board, which pin is positive input, which one is the negative output, not only let us see the positive and negative wire colors above the connection terminal, we also pay attention to the circuit of the PCB. , Never wrong, some PCB circuit uses the connectors under the connection terminal to use the absorber, and take the lead solder and take the circuit check, analyze, find a small record,
How to crop? ?
Depending on your environment, for example, two and 3 strings, you will cut three boards that are continuously connected upside down, as shown below,
When the cut, the hand must be stable. I can't cut it. I can take my own hand, you can use the hand saw you slowly saw it. The premise is that you have to clear the area, a piece of section is clear, don't get the wrong area Otherwise, it is useless.
So how do you determine whether the cut module has protection? This is to test your little notes, according to the positive and negative poles of the circuit board originally do not cut to yourself, regarding the optocoupler signal circuit, it is not necessary to directly down the knife.
Next, it is modified. We add a light so that the intuitive obvious display of our board is protection or no protection. Here I want to say is that the current of this change protection board is very low, so say 18R0 Light Bulbs We have to choose ultra low pressure, can not exceed the voltage of the super electric capacitor itself, many light bulbs are 3.3 although some color points brightness bit 2.0 or other, but even if the voltage is too difficult to light this lamp The year is too low, so everyone uses 1.5V light bulbs.
Then put the bulb parallel to our two resistors, so it will be visualized. Note that the welding lamp is clear, and the light bulb is not more than 20 mA. If your own balance board current is large, please add the current resistor, and dark to the 1k 470 resistance to reduce it according to the brightness. Current limit resistance
First protect the board protection board, so that the control voltage will work, protect the voltage consistency and discharge function at both ends of the power supply, use the adjustable power supply, let us first set a voltage of 8 ~ 10 volts, then our kettle current setting 500mA, Then open the channel, energize, pay attention to the positive and negative poles, and the balance board is absolutely not allowed to perform reverse charging. If we find the total positive and negative poles first, then we can see the light bulbs above the motherboard. Distance
The light bulb is on, then use our multimeter to measure whether the back of the light bulb is consistent, pay attention to your own multimeter accuracy, do not use the garbage table to measure, this requires high precision measurement, non-high-precision table Going to this, some tables are not allowed, why is the capacitor explosion, why do you have problems, most of them detect adjustment parameters because there is no accurate equipment, like this module, he needs to pass DCDC high-precision adjustment at least 3 after the decimal point, otherwise you don't toss. Don't hurt yourself because the capacitor is not overpressive.
Then 8.24 volts is already not boot protection. At this time, our packet module voltage is about 2.7X, so we have to adjust the voltage to 2.7 volts.
So basically that the battery protection board is OK, you can include the diy module to spell the capacitor,
Since the capacitance belongs to a large current, we can't use the blue-colored DCDC to charge the capacitor. We want to use the big power DCDC of the green board to charge, the current is about 25A, 12V, Only such a big can charge the super capacitor in time.
Then the bottom of the lower right side is the current header, used to detect the current of the charging and the waveform statistics, belong to a very good head, two modules about more than about more than about 300, then I will add some of the entire capacitive assembly Line layout and some precautions.
If it is used in the car, it is not the case, this is just a thinking of the electric welder, and then the super capacitor is a little missing in this area, and it is written. Temporarily update.
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