-How long does the Honda Accord hybrid use lithium batteries?

How long does the Honda Accord hybrid use lithium batteries?
author:enerbyte source:本站 click119 Release date: 2024-05-16 08:28:18
abstract:
The tenth generation Accord hybrid adopts Honda's third-generation IMMD hybrid system, and the relative change in battery size compared to the second-generation IMMD hybrid system is a 32% reduction in volume, with no change in capacity. Honda's hybrid system uses li...

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The tenth generation Accord hybrid adopts Honda's third-generation IMMD hybrid system, and the relative change in battery size compared to the second-generation IMMD hybrid system is a 32% reduction in volume, with no change in capacity.

Honda's hybrid system uses lithium-ion batteries, with nine battery cells connected in series to form a unit. After eight units are connected in series again, they form a high-voltage battery pack with a voltage of 259.2v and a capacity of 1.3kwh. When it comes to hybrid cars, we have to mention Toyota. The sales of its hybrid electric vehicles have exceeded 10 million units, which can withstand market tests and is a mature model. When it comes to batteries, Toyota's hybrid uses nickel hydrogen batteries, which everyone can think of as having a long lifespan. In fact, the reason for the long lifespan of nickel hydrogen batteries is due to the charging and discharging strategy and the contribution of power management software. Toyota's strategy is to use shallow discharge and frequent charging. The battery only uses 40% of its capacity, such as a 1000Wh battery that only discharges 400Wh. When the battery capacity is below 600Wh, the battery stops discharging and indicates low battery level. As a result, the battery always stores 60% of its capacity, greatly increasing the number of cycles. Even the Prius battery, which has been in use for over a decade, has not decayed. This is the credit for power management, which can extend battery life.

The reason Honda uses lithium batteries is due to their high energy density. Compared to nickel hydrogen batteries, lithium batteries have a higher capacity under the same volume, and are smaller and lighter in weight under the same capacity. Another reason is that Honda's electric motors have high power, for example, the maximum power of Accord's motors can reach 135kw. The instantaneous discharge current requirement is high, and lithium batteries have the characteristic of high rate discharge, which cannot be compared to nickel hydrogen batteries. Therefore, Honda will not use nickel hydrogen batteries at all.

As for the issue of lithium battery lifespan, Honda has also adopted a similar solution to Toyota's shallow discharge, such as using only 55% of the capacity of lithium batteries. Shallow discharge, leaving a portion of the capacity inside the battery, increases the number of battery cycles, and prolongs its lifespan. Therefore, the Honda Accord hybrid version battery warranty is ten years/200000 kilometers, which also gives consumers more peace of mind. After all, the probability of a car being driven for ten years is not high at present, and even if the battery is damaged ten years later, its price will also be very cheap.

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