1. Battery panel heating: When current passes through the short circuit path, the current density inside the battery panel increases, thereby generating a large amount of heat. If this situation persists for a long time, it may cause local overheating of the panel and cause damage to the panel.
2. System Power Loss: A short circuit will cause a loss of power in the system, thereby reducing the power output of the photovoltaic cell. Additionally, since a short circuit will cause a voltage drop, it will also affect the efficiency of the system.
3. Safety Risks: A short circuit will increase the current in the photovoltaic system, which may cause fire and other safety risks.
Solar batteries are not the same as batteries
A battery will consume electricity through self-discharge after a while if you do not charge itDo not connect to a load once it is fully charged.
The power output of the solar cell is determined by the load
That is, the solar cell must produce power even if you add electricity to it. 'light energy
.
Moreover, you need to understand one thing,
That is, solar cell is not an energy storage device
p>It's just a power conversion device
Only when you connect a suitable load
can you get maximum power or maximum efficiency
One open circuit of the solar cell
One open circuit of the solar cell
p>
equivalent to your charge being infinite
< p>Then the power of the solar cell itself cannot be releasedBut it does not affect the performance
Because the solar cell at this moment is equivalent to an open loop circuit
There is noof current.
The light energy you add does not stimulate the movement of electrons
The energy you are concerned about is a form of thermal energy that is consumed at the surface of the solar cell
< p>Let me give you an exampleYou put a plant with green leaves under the sun
Since the green leaves themselves have to carry out photosynthesis
So the green leaves will absorb energy and make the plant grow
If you put a dry leaf on it
Although you always add light energy
But this light energy It is not absorbed
The same goes for solar energy in open circuit solar cells
Although you add light energy
but this light energy is not converted into electrical energy
So it will not affect the lifespan of the solar cell itself
If the solar cell is short-circuit
This is equivalent to your load being infinitesimal
All the power in your solar cell The power adds to the load
The current that it crosses instantly is infinite
The actual current cannot be infinite
You can use a multimeter to measure the current in a short circuit< /p> p>
The measured current is the short circuit current
If the current is too large, the solar cell will heat up
If the light source is sufficient and the output power is too large, the internal crystal structure will be damaged< /p>
Short circuit current multiplied by the open circuit voltage corresponds to the theoretical maximum output power of the solar cell.
In practical applications
To adjust the output efficiency of the solar cell to the optimal point< /p>
that is, the commonly mentioned MPPT maximum power tracking technology