Can electric car lead acid battery be replaced with lithium battery?

Recently, a friend asked me, the new national standard has come out, can you replace the lead-acid battery of your electric car with a lithium battery? For this problem, as a mechanic to give the advice not to change, why so?

First of all, everyone knows that after the new national standard was introduced, there were strict regulations on the standards of electric vehicles, which means that the testing of electric vehicles will be stricter. On the other hand, companies must also have 3C certification and electrical qualifications. Taken together, if you replace the lead-acid battery with a lithium battery, it is very likely that you will not be able to go on the road.

Second, if the lead-acid battery is replaced with a lithium battery, it must also be considered that the voltage must remain the same as that of the original lead-acid battery. In addition, the charger must also be replaced with a dedicated lithium battery charger. Of course, there is a problem. If the lithium battery is not installed properly or there are any quality problems, the controller may be burned, which is one of the reasons why installation is not recommended.

In addition, replacing lead-acid batteries with lithium batteries also takes into account the size of battery cells. In general, lead-acid batteries are relatively large, and lithium batteries are relatively small in size. If you want to replace them, you must take this factor into account. If the gap after installation is too large, it is easy to cause the inside small battery to shake and reduce life.

Of course, the most important is the price issue. Generally, the price of lithium batteries is several times that of lead-acid batteries. This reflects the fact that its cost performance is not high and does not meet the standard for general users to choose electric vehicles. Although lithium batteries are lighter in weight, longer than the original, and have a long service life, the effect is not so obvious in actual operation.

Finally, lithium batteries are less stable than lead-acid batteries. If they are in contact with water or mishandled, they are prone to explosion. Therefore, this is an important reason why I do not recommend replacing lead-acid batteries with lithium batteries. In addition, it should be noted that the lithium battery is multi-piece structure, as long as there is a problem will affect the overall quality.

In short, whether it is from the new national standard or from the actual point of view, as a mechanic, I am not recommended to replace the lead-acid battery of electric vehicles with lithium batteries.

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