Therefore, when idling, the speed of the generator is above 1500 rpm.
There is a national standard, QC729-2005 "Technical Conditions of Alternator for Automobile", which stipulates that when the generator turns from 1000 to 10000, the voltage provided should be stable at around 14V.
This voltage is higher than the ordinary 12V battery voltage, so that a potential difference can be formed to charge the battery.
It's like, water flows from high places to low places for similar reasons.
No-load current is higher than 40A. Since the voltage is enough, it depends on the current, because the current affects the charging speed.
At present, the rated current of domestic generators is generally above 100A. For example, the rated currents of Corolla and LaVida generators are all above 100A.
However, the output current of the generator changes with the rotational speed, not 100 when starting, so it is difficult to reach the rated current when it is empty.
The same is the previous paper: when the rated current of a generator is 105A, the output current should be at least about 40 to 45A at1500rpm.
When the family car is idling, the current provided by the generator is about 14V, 40A.
The charging speed of a battery is related to its own characteristics. The battery will adjust the input current according to the current situation. Charging the battery does not mean that the output current of the generator is the same. It should consider different charging methods according to its own power and voltage.
It's like eating. We feel a little fat, eat less greasy and fatty food and two sweets.
Sometimes I feel "oops". I've lost weight. I can add some nutrition, eat more rice and even eat a snack. Almost, it will adjust itself.
Battery charging is carried out in stages. There is a paper in Journal of Shanghai University of Engineering Science, which mentioned the VRLA battery for vehicles and its charging control strategy.
At present, automotive lead-acid batteries are all small batteries with six batteries connected in series, and the combined voltage can reach more than 12V.
The most widely used charging method is "constant current and constant voltage charging", which is a two-stage charging method.
1 stage, the battery is charged with large current and constant current. When each battery almost reaches 2.35 to 2.45V, enter the second stage, and charge the battery at constant voltage until it is full.
You see, one is constant flow and the other is constant pressure. The same thing is different.
At the charging 1 stage, the battery input current is 0.4C, and the battery input current is 0.4C (coulomb).
Many people don't know what Coulomb means, it doesn't matter, anyway: charging rate.
For example, the battery capacity is 60Ah (ampere hour). If the battery continuously inputs 0.4C current, 1 hour can charge 24Ah, while the input instantaneous current is 24A.
As mentioned earlier, the generator can provide about 40A current at idle speed, and it is certainly no problem to meet the current input of 24 A. ..
So it is not right to say that the accelerator can be charged quickly in situ.
As long as it is idling, don't turn on air conditioners and high-power appliances. You've used it all. In fact, there is no need to blow the throttle in place.
10 minute can charge about 4Ah at most.
10 minute idle charging time is a little short, and it may not enter the second stage I just mentioned.
10 minute According to the charging stage 1, it can almost charge 4Ah.
I'm still eating, there are desserts and all kinds of things, but I have to catch the bus for two minutes and I'm going to be late. Wow, wow, isn't it?
I didn't eat dessert, maybe I didn't eat enough. This is probably such a state.
The reaction of lead-acid battery can't convert 100% into electrical energy, and battery charging is a process of converting electrical energy into chemical energy. Lead sulfate in lead-acid batteries is converted into sponge lead and dilute sulfuric acid to store electric energy.
There is energy consumption in the conversion process. You can't turn everything you eat into fat and energy, can you?
Something has to come out, right? It will be wasted, right?
Even if the car doesn't drive at ordinary times, the battery will lose about 1% every day. Assuming that it stops for 20 days, the full power will drop by almost 75%.
According to the Test and Analysis of Battery Energy Storage Efficiency, if the current battery capacity is about 75%, the electric energy conversion efficiency is above 90%.
This calculation, 4Ah times 0.9, the real charge is 3.6Ah.
It takes a certain amount of electricity to start the car ignition. That's not all. When the car starts, "cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck cluck.
I have calculated it for everyone before. Suppose a 60Ah battery starts for 3 seconds at a time and consumes 750As (ampere-second), which is 0.2 1Ah.
You subtract 0.2 1 from 3.6Ah, and the final calculated 3.39Ah is more real, which is almost 6% of the total battery capacity.
What's the difference between automatic start-stop bottle and ordinary battery? Don't some cars have automatic start-stop function?
The battery it uses is generally AGM battery, which is called "lean liquid valve-controlled battery" or EFB battery-"rich liquid battery". The service life of these batteries is more than three times that of ordinary batteries.
But valta is a famous battery factory, isn't it? It goes like this: AGM and EFB batteries are actually the same lead-acid batteries as ordinary batteries.
Only the internal diaphragm and electrolyte are optimized, and the cycle charging times are improved, and the charging efficiency will not be much faster than that of ordinary batteries.
Just like running, some shoes are wearable, but wearable means that you can use them for a long time, not that you can run faster in those shoes.
How much charge the battery can charge in a fixed time is still determined by its own capacity and the current charging method.
Idle charging 10 minute can ensure sufficient power. Generally speaking, if the car is parked for one week, charging at idle speed 10 minutes will ensure sufficient power.
But if the car has been parked for more than 20 days, it will be safe in another 20 minutes.
How to judge whether the battery is short of power? Of course, what I just said is that the idling speed 10 minute is about 6%, which is an ideal situation.
For example, some cars are older, and the battery has been used for a long time, and the total capacity begins to decline, so the battery may be charged less.
Therefore, when the battery capacity drops to a certain extent, it is necessary to change the battery, otherwise it will not only charge slowly, but also be easy to lose power and fail to catch fire.
How to calculate the battery power loss? How to judge for yourself?
Question 1: One should have the confidence to act. (or men need confidence. )
Question 1: There is no (1) article that first says "being a man needs self-confidenc