What are the risks of charging the charger for a long time? Learn these principles, safety knowledge early prevention
In our lives, people's need for smart appliances is accelerating, the demand in the charging field is increasing, and the dependence on chargers is getting stronger and stronger, such as mobile phones, battery cars, new energy vehicles, etc., especially in some special places Where electricity is needed, it has become more common.
In the charging process, safety is an inevitable premise to consider, such as in the charging process, short circuit, charging time and ambient temperature, etc., spontaneous combustion will occur, what is the reason for this? Today I will share it with you in detail.
In order to be able to let more people understand, so this article uses an easy-to-understand writing, the word is a bit long, it is recommended that you collect and read, like friends remember to pay attention to likes, thank you for support. Let's get to the point:
Why does spontaneous combustion occur, spontaneous combustion is due to changes in external conditions and internal changes caused by energy loss, and this loss will lead to a drop in voltage and an increase in current; In addition, if it is not treated in time, there will be a decrease in power and an increase in temperature.
Therefore, in order to avoid these problems, it is necessary to prevent or control the combustible part of the charger in advance and take effective measures to prevent its damage.
For the length of use of a battery, some scientists are also constantly trying to find ways, the reason is also for safety considerations, such as commonly used methods such as chemical reagent method, thermal method, electrolyte method and so on. I won't elaborate here.
First, the basic principle of charging
As a general rule, most of the charging process is a new type of hybrid system consisting of a battery and a charger. The main function of some charging stations is to provide stable voltage and current to the storage and AC power grids to meet the user's electricity demand.
When the storage reaches a certain value, the power can be supplied to the electricity customer. Inverters supplied to DC for the connection of DC power grids. For the working principle of the charger, in the process of charging, when the capacity of the energy storage device exceeds the required amount, the energy storage system will automatically control it to keep it as it is, and then convert the energy into other forms of energy through the output of the inverter to supply it to the place where it is needed.
Because the use range of charging is relatively wide, the requirements for it are relatively high, so in order to ensure safe operation, it is necessary to have sufficient power supply for its normal operation.
Specifically, charging refers to a new type of power conversion method that uses the battery as a power source to convert ac electrical energy into DC power suitable for electricity consumption at a certain voltage. In a given environment, the act of converting electrical energy from a device that can be turned into a usable current or other form of energy output is called charging.
According to the charging charge and discharge, it can generally be divided into primary, secondary and hybrid. According to the charging time, it can be divided into intermittent, continuous and intermittent types.
For example, when we commonly use the charging of electric vehicles, when powering these appliances, they will generate a certain amount of heat and release it, so that their internal temperature will rise, and when this happens, it will make the heat of the entire system run out of control, resulting in a rapid increase in local heat, or spontaneous combustion, or even rapid explosion.
Second, how to avoid this situation
In order to make the safe operation of the charging treasure, when charging, researchers will make reasonable settings for the voltage and current value and charging time of the charger to ensure that it can meet our needs; At the same time, it is also necessary to make an accurate judgment on the charging amount and the size of the charging station, if it is a reasonable use, the safety risk can be controlled.
In the process of charging the battery, it is best to observe or test the temperature change of its electrical appliances at any time, and deal with and stop the power supply in time when an abnormality is found.
For example, when the value of a fixed rated capacity in the storage box exceeds this range, a high temperature phenomenon will occur. Therefore, in the process of use, according to the actual situation of the storage box, a certain current limiting resistance value should be set so that it is greater than the specified current limiting resistance value.
In the process of charging and discharging, when the capacity of the battery reaches the maximum value, the voltage of the battery will drop, which will lead to spontaneous combustion; When the charging time is too long, the charging current is too large, it may cause the temperature of the battery to rise, so that the chemical reaction speed inside it is accelerated, and eventually the combustion rate is increased, and finally the degree of spontaneous combustion is increased.
In the process of charging, if there are two kinds of electricity at the same time, a significant mixed spark will be generated, which is also one of the reasons for spontaneous combustion of charging. Therefore, we must avoid these two factors separately, because the explosion or short circuit caused by uneven mixing, such as our commonly used mobile phone convenient charging storage appliances, it is best not to put them near the stove, not easy to dissipate heat in the leather bag and so on.
Third, the impact of the charging environment
When filling and discharging, it is necessary to consider the influence and limitation of various factors such as temperature, air pressure, current, environment, man-made and so on. While charging, it is necessary to prevent the occurrence of voltage and overcurrent. When the charging time is relatively long, there will be an overcurrent phenomenon, at this time it is necessary to widen or reduce the resistance of the battery to reduce the charging capacity of the battery, so that it can be quickly released, which will lead to damage to the battery; Conversely, if the duration is longer, it will make the charging less efficient and even unusable.
At present, the world is groping for the stability of charger batteries, it can be said that it is in the early stages of the development of electric energy, and the use of charging is also growing rapidly, but there are still many problems to be solved in the development of charging. The immaturity of charging technology and short life are the main factors, so its number of charge and discharge is relatively small, and its capacity is relatively large, which leads to many safety hazards in practical applications.
summary
The charging process of electric vehicles is a very complex process of physico-chemical change. We don't need to know much about its complex principles, but the most basic safety knowledge we need to know, I also through a lot of information to consult the specific knowledge,
For the charger, while bringing us a convenient life, there will be certain safety hazards, but as long as we understand how it works, we can avoid many risks.
The charger generally has the following factors affecting it: First, the number of charges, if the remaining capacity of the battery is relatively large, then the smaller capacity should be selected; conversely, if the remaining capacity of the battery is small, the larger capacity should be selected; Conversely, if the remaining capacity of the battery is relatively small, a larger capacity should be used; The second is the charging time: when the peak of electricity consumption, because the demand is not very large, and there are other unstable reasons for the possibility of generation is relatively large, then it is necessary to choose a longer capacity to meet this requirement.
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