Electric bicycle batteries sometimes develop faults, such as leakage, failure to charge, and deformation. Here is a summary of five common failures of electric bicycle batteries and their causes for your reference:

1. Battery leakage

If your electric vehicle battery is leaking, it is usually caused by one of the following four places:

1) Leakage caused by poor sealing between the upper cover and the bottom trough, by impact, or by cracking of the sealing adhesive;

2) Acid leakage from the cap valve;

3) Acid leakage at the terminals;

4) Acid leakage from other parts.

Note: Battery leakage is a serious problem. The leaking fluid is highly corrosive to both the vehicle and people, so always pay close attention to safety.

2. Battery will not charge

If your electric bicycle battery cannot be charged, first check whether the charging circuit connections are secure, whether the wires and plug contacts are in good condition, and carefully inspect the socket and plug for arcing or burn marks and the wiring for damage or broken lines.

If all of these are fine, check whether the charger is damaged and whether its charging parameters meet national standard requirements. If there is still no problem, the battery itself may be damaged; if repair brings no improvement, it is time for a new battery.

3. Plate sulfation of the battery

Plate sulfation is a common fault of lead-acid batteries, and many battery failures occur because of it. Its symptoms: during charging the voltage rises very quickly, gas is given off too early, and temperature rises fast; during discharging the voltage drops quickly and capacity is small.

4. Imbalance within the battery pack

Balancing a series-connected battery pack is a worldwide problem, and lagging batteries always appear during use. The causes vary, including production issues, raw material issues, and usage issues.

5. Battery deformation

According to professionals, swelling and deformation happen mainly because the pressure inside the battery rises sharply. The causes of this phenomenon include:

1) Valve pressure too high or blocked. Normally an electric vehicle battery has a safety valve that releases excess pressure, but on some batteries the safety valve works poorly and cannot release pressure properly, causing the case to bulge and deform.

2) Float charging voltage too high, making the temperature rise too fast. The float charging voltage of an electric vehicle battery is set within a reasonable range to avoid current shocks. If it is set above the normal value, the internal temperature rises rapidly while gas exhaust is not timely, and the battery swells and deforms.

3) Overcharging leading to poor internal gas recombination. Every user charges the battery, but not every user charges it correctly. Many users do not know how to charge properly, so the battery is overcharged or undercharged, and both affect the battery. Overcharging in particular easily increases internal pressure and leads to deformation.

These three points are the main reasons why an electric vehicle battery swells and deforms, and the root cause lies in inadequate quality. Therefore, when choosing a battery, prefer a high-quality, good-reputation branded battery, such as a Xupai battery. Xupai batteries are of excellent quality with good service; its sales, customer service, technical support, and repair systems are well established, giving consumers better after-sales service.

How far an electric bicycle can travel each day depends on how well the battery is maintained. So in daily use, remember the five points above to keep your electric vehicle in great condition!