Should The Original Controller Be Replaced,if The Lead-acid Battery Of An Electric Vehicle Is Replaced By A Lithium Battery?

I can tell you with certainty: in the case of lead-acid battery DC voltage U1=U2 lithium battery DC voltage, the controller does not need to be replaced and can be used with confidence.

One, the reasons are as follows:

1. The electric vehicle controller accepts a DC power supply. It was originally provided by a lead-acid battery, but now it is provided by a lithium battery of the same voltage, which is the rated voltage of the controller, so there is no need to replace the controller.

2. If the power supply voltage U1 of the lithium battery is different from the voltage U2 of the original lead-acid battery, the controller voltage needs to be replaced at this time, and it is also necessary to consider whether the motor, lighting and other equipment are matched with the voltage.

Second, the comparison between lead-acid batteries and lithium batteries.

1. The advantages of lithium batteries compared to lead-acid batteries:

(1) The average voltage of lithium batteries is high.

(2) The energy density of lithium batteries is high.

(3) The lithium battery is light and easy to carry.

(4) The service life of lithium batteries is relatively much longer.

(5) Lithium batteries are highly adaptable to high and low temperatures, and are less affected by temperature.

(6) Relatively speaking, lithium batteries are more environmentally friendly.

2. The disadvantages of lithium batteries are analogous to lead-acid batteries.

(1) The security and stability are relatively poor. The news said that there had been an explosion.

(2) Lithium batteries cannot be discharged at high currents, which poses safety hazards.

(3) High cost and high production requirements.

3. The advantages of lead-acid batteries compared to lithium batteries:

(1) The price is relatively cheap and accepted by the public.

(2) Good high-rate discharge performance.

(3) It is suitable for floating charge reaction, and the service life is also acceptable.

(4) Lead-acid battery recycling is expensive and relatively easy.

4. Lead-acid batteries are analogous to the disadvantages of lithium batteries.

(1) Heavy metals are easy to cause environmental pollution.

(2) Lead-acid batteries have low energy density.

Question 2: Why are electric bicycle brakes divided into high level and low level? Which is better, high level or low level?

This is actually the problem of whether the controller brake line has a common anode or a common cathode. Generally, electric vehicles use the negative electrode of the battery to control the brakes, that is, the common cathode, and the common anode is relatively small, and the circuit is nothing better. The difference is the difference. Many people are used to it. For example, the motorcycle gear display switch is also a common cathode, because the motorcycle frame is connected to the negative electrode, which is more convenient, and the electric vehicle frame is not necessarily connected to the negative electrode, but this Let's form a convention. From the perspective of controller programming and circuit design, there is not much difference.