New energy vehicles is to use nimh batteries?
over time, the gradual development of new energy vehicles, new energy car battery production safety technology phenomenon also becomes more and more special attention and attach great importance to everyone. In fact, the measure of automobile power battery is the most important two indicators safety coefficient and the cost. Lead-acid battery weight is heavy, can fast charge deep discharge, short service life cycle; Lithium ion battery with large current characteristics, and the price is high, but the long-term existence safe hidden trouble. Instead, the nimh batteries, that today we began to Chou Chou new energy vehicles is use nimh batteries?
new energy cars are popular with three types of batteries
so far for the hybrid bus passenger car battery generally has three kinds: lead-acid battery, nickel metal hydride battery and lithium battery. Lead-acid battery weight is heavy, can fast charge deep discharge, short service life cycle; Lithium ion battery with large current characteristics, and the price is high, but the long-term existence safe hidden trouble. What about why people are like to use nimh batteries, let's take a look at the advantages of nickel metal hydride batteries used in new energy vehicles.
the advantages of nickel metal hydride batteries used in new energy vehicles
1. Nimh batteries than lithium battery safety explosion not easily
nimh batteries for nonflammable electrolyte aqueous solution, compared to the heat capacity nimh batteries, electrolyte evaporation heat is higher, and compare the energy density is low, even if again short-circuit fault, broken, such as extreme anomalies, battery temperature small and wouldn't kindle easily. Product quality problems of nimh batteries adjustment difficulty coefficient is relatively low, the possibility of defects resulted from their production and manufacturing is relatively low. Nimh batteries than lithium battery safety explosion not easily, you can see the samsung mobile phone explosion news is that all of them are using lithium battery pack cause safety accidents.
2。 Very good quick charge nimh batteries have excellent properties
nimh batteries alkaline electrolyte aqueous solution, the minimum can be - 40 ℃, - 20 ℃ under the discharge can be 2 ~ 3 c lithium ion battery choose organic electrolyte solution, low temperature resistance rapidly expand, 0 c characteristics have been largely attenuation coefficient, can not satisfy the - 10 ℃ under normal use requirement. Lithium ion battery - Under 5 ℃ can not charge, otherwise easy to cause safety hidden trouble.
3。 Nimh batteries can be environmental protection of green environmental protection and recyclable
nimh batteries do not contain high toxic substances, main ingredients for nickel and rare earth elements, recovery of high value, There are residual value) , recycling the difficulty coefficient is small, basic can be recycled, all green development concept.
4。 Hydrogen fuel cells have not obvious & other Memory effect & throughout;
often said batteries & other; Memory effect & throughout; , often referred to as if the battery every time no after electricity, such as release only four hundred percent, so after using for a long time, will not be able to release the remaining six hundred percent of capacity, it is largely reduced storage battery capacity, can directly affect the use of the battery. The battery capacity will appear in the cycles of charge and discharge link attenuation coefficient, and the excessive charging or discharging, could fuel battery capacity loss ( in the almost negligible) 。 So for the manufacturer, the nimh battery control system will take the initiative to avoid excessive charge and discharge in the set, such as the battery charge and discharge interval artificially adjust within a certain percentage of the total capacity, in order to reduce capacity attenuation coefficient of velocity.
new energy vehicles whether a hybrid car, or is the biggest characteristic of pure electric vehicles is USES the high voltage battery technology. So far have seen a large part of the new energy vehicles chemical battery technology was used for the drive, considering the new energy car battery sort is more, a large part has been updated by now market
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