Motorcycle batteries are lead acid batteries. If the lead-acid battery is replaced with a lithium battery, once the lithium battery is injured in a collision, the positive and negative separators will be short-circuited, and the possibility of the battery burning or exploding is very high. Lead-acid batteries have mature technology and low cost. The price difference between lead-acid batteries and lithium batteries is about 2-4 times. However, the lifespan of lithium batteries is longer, so a comprehensive analysis shows that the price difference will not be. be so big when used later. Lead-acid batteries have good fatigue resistance and high temperature tolerance. The lithium battery should be under the BMS protection board so that the status of each battery cell can be accurately monitored to ensure that the lithium battery is not overcharged. The bLead batteries have better instantaneous burst performance. The instantaneous current of the starting system is generally more than 200A. The performance of lithium batteries will decline rapidly under high-rate discharge, but the maximum discharge rate of lead-acid batteries can reach 10 times, and the general operation rate is 3 to 5. times.
I can responsibly tell the poster that this is not allowed. First of all, electric bike batteries are usually 36V or 48V. The nominal voltage of lithium-ion batteries is 3.7V, so you need at least 10 batteries in series. If your electric car is 48V (determined by the motor), you need 12 batteries in series. Second, the safety of lithium-ion batteries must be guaranteed. Lithium-ion batteries are subject to overcharge, overdischarge, overcurrent and short circuit. For example, in the event ofovercurrent, when starting an electric vehicle, the current can instantly reach 20 to 30 amps. If the battery you assemble yourself does not have a protection circuit, the battery will easily swell, catch fire or even explode. I'm certainly not trying to scare you when I was experimenting in the company with batteries. the protection circuits would also catch fire. Third, the capacity of the battery connected in series is determined by the capacity of the smallest battery. Your single battery is 4 Ah, but if 10 batteries are connected in series it will still be 4 Ah. Your car almost won't be able to do it. run. Therefore, you either choose a single battery with larger capacity or adopt a series-parallel combination. Of course, in this case the protection circuit will be more complicated, involving technical problems such as protectionand multi-chain balancing. Anyway, in a word, your idea is not very practical, so don't worry about it.