Are there lithium battery management chips that replace lead-acid batteries?

[daisizhou]

I have a Yamaha motorcycle,It uses 12v lead acid battery,Usually this kind of lead-acid battery has a service life of only 2-3 years.
I've seen a lot of people use lithium batteries instead, but it looks like they're amateur-made and not legitimate products.
The most common solution I see is the lithium iron phosphate battery solution,But they hardly use battery management chips, some even simply connect positive and negative。
I was wondering if there are any specialized chips suitable for lithium battery management used on motorcycles?

Because the starting current is usually 90A-120A，Conventional lithium batteries will disconnect the battery cells after they are fully charged, but they cannot be disconnected on motorcycles because lead-acid batteries have trickle charging. In other words, a lead-acid battery is similar to a "load resistor" after it is fully charged.

[thm_w]

The most common solution I see is the lithium iron phosphate battery solution,But they hardly use battery management chips, some even simply connect positive and negative。

Most 12V Lifepo packs have a BMS inside. It would be very odd not to.
Here is one example: https://www.amazon.ca/MOSEWORTH-LiFePO4-MOS7B-4-Motorcycle-Kawasaki/dp/B093BZYWNK
You can also get lithium which also has BMS, as seen in the photos, not cheap but it is quality: https://no.co/products/lithium/powersport

Conventional lithium batteries will disconnect the battery cells after they are fully charged, but they cannot be disconnected on motorcycles because lead-acid batteries have trickle charging

No, the BMS will only disconnect the cells if it has been overcharged. Max recommended charge voltage is around 14.6V. The absolute max cell voltage is ~4.2V or 16.8V for the pack. So BMS might cut out somewhere around there. A good battery charger would not exceed that voltage, or you can get specific lithium 12V chargers.

Same for the motorcycles alternator, it should not exceed 15V unless something is wrong.