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1. When refitting, we should consider the volume and space. At the same capacity, the volume of lithium-ion battery is only half of that of lead-acid battery, so we can certainly fit it. But we should pay attention to some shape and packaging problems. After all, the space on the car is not necessarily the same direction as the battery. You should consider the fixation and reliability to prevent the shock from falling down.

And if the economic conditions allow, of course, it is hoped that the capacity of the modified lithium-ion battery will be as large as possible. Therefore, it is necessary to make full use of the upper space and select the battery with reasonable shape for layout. If you replace with the same capacity, because there is too much space left, you should find something to fill up the extra space to prevent the lithium ion battery from shaking and falling off when driving.

2. When disassembling the battery, although the output of the battery is positive and negative, which is very simple, it should also be removed one by one, wrap the exposed cable ears with adhesive tape, and then note± When installing the sign, the positive and negative are connected back one by one, so as to prevent the positive and negative from being connected reversely when the work is blurred, or inadvertently short circuit the positive and negative poles of the positive and negative battery, causing safety problems.

3. When purchasing lithium-ion batteries, it is better to let the merchants match the same or similar plug terminals. If the plug shapes are different, some may need to be re-pressed or welded, or even converted to wires, and so on. It is necessary to pay attention to the current size to select the size of the specification. It is also better to put a multimeter DC, and re-measure the voltage when wiring to prevent the positive and negative from being reversed. Remember, the positive and negative poles must be placed separately. Do not conduct operations such as grounding the negative pole.

4. If the motor and controller are increased while replacing the battery, it is necessary to consider whether the main return line should also be thickened. You can check the electrician's manual to see how many amps of wire can pass through. If the wire of the original car is thinner, it will also leave safety hazards, and the efficiency and power effect will be discounted.

5. If the lead-acid battery is changed to lithium-ion battery, the charger must be changed to lithium-ion battery. The internal resistance of lead-acid battery is large, and the output voltage of general charger is higher, and many of them have pulse charging function, so the lithium-ion battery may be overcharged during charging. Because of the protection board, the charger output voltage setting will be abnormal during charging, and the backward monomer may not be fully charged and cause damage. If it happens that the protection board is broken, such high-voltage charging can easily cause explosion.

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