The carbon emissions target has had a huge impact on the automobile industry, and vehicle emissions are considered to be a major source of pollution, even if the auto industry does not agree with this accusation.
For the general public, there is still a little distance for non-emission electric vehicles (not the main body of sales for the time being). Now the best feasible energy saving and emission reduction scheme is engine self-start and stop technology, corresponding to the new 12 volts battery.
When the engine turns off, the car's electrical system is powered by 12V lead-acid batteries alone. If you install a set of old lead-acid batteries from the 1990s, it will twitch to death because neither power nor capacity can meet the power needs of modern models. It's not that this old battery can't be installed, but it's going to be scrapped by the car's electrical system. It's aging faster than you can imagine, so the current minimum passenger car has to have an EFB battery.
How long does the 12V battery usually run out of power?
This index tests the self-discharge rate, that is, the charge retention ability of lead-acid batteries. In theory, the self-discharge rate of lead-acid batteries is between 20-30%, that is, 20-30% a month, but in practice it is much more than that. In general, a healthy 12V lead-acid battery can barely start after standing for 30 days, and it will be a little hanging for more than 30 days. If a car can't start for 15 or even 10 days, it's time to change to a 12V lead-acid battery.
Do 48V hybrid cars still need 12V lead-acid batteries?
1. Yes, at present, all 48V light hybrids need 12V lead-acid batteries.
2. 48V batteries generally use lithium-ion batteries to serve high-load components such as engine self-start and stop, air conditioning, electronic anti-tilting bar, air suspension and so on.
3. 12V lead-acid batteries are used to power door locks, burglar alarms, stereos and other low-load components.
The 12V lead-acid battery of 48V light hybrid car is still damaged and needs to be replaced after several years of use.
Do new energy vehicles still need 12V lead-acid batteries?
1. Yes, even pure electric cars also need 12V lead-acid batteries.
2. When the 12V lead-acid battery is low, the high-voltage power battery of the new energy vehicle will charge it, but according to the logic set by different manufacturers, some new energy vehicles will not be able to unlock the door because the 12V battery is dead. This has happened to us.
3. Low-load electrical assemblies such as car anti-theft systems and door locks do not need the high voltage of the 200V-400V power battery at all, so the new energy vehicles will let the high voltage "power off" to save power loss during the suspension period, and only 12V is used for vehicle monitoring.
4. Like the 48V light hybrid, the 12V lead-acid battery of the new energy vehicle is still a wear and tear.
The industrial chain of the traditional 12V lead-acid battery is very complete, and the performance and price is relatively high. even if it is gradually decommissioned on the vehicle, it can continue to be used on the non-mobile platform, and its industrial scale is in a period of decline. The advantage of the lead-acid formula is that the thermal runaway is very low, and very few vehicles ignite spontaneously because the lead-acid battery is out of control. In addition, the working temperature of lead-acid battery is as wide as-20 ℃-60 ℃, which is incomparable to most lithium batteries at present.
