1、过度充电：当理士蓄电池遭遇过度充电时，电池板会因内部活性物质膨胀而变形，这将直接引发鼓包现象。过度充电会导致内部产生过多的气体，使电池壳体膨胀。

overcharging: when the battery is overcharged, the panel will be deformed due to the expansion of the internal active material, which will directly cause the bulge phenomenon. Overcharging can cause too much gas to be generated inside, causing the battery case to expand.

2、 电池失水：在高温环境下，电池内部压力上升，限压阀开启，若失水过多，电池活性会显著下降。这将使电池在充电时面临壳体发热、膨胀和变形的风险。

battery water loss: in a high temperature environment, the internal pressure of the battery rises, the pressure limiting valve is opened, if the water loss is too much, the battery activity will decrease significantly. This will expose the battery to the risk of heat, expansion and deformation of the housing while charging.

3、质量低劣的充电器：使用劣质材料和元件的充电器可能导致充电器过热，参数不稳定，进而导致充电电压失控，最终引发电池鼓包或爆炸。

poor quality charger: The use of inferior materials and components of the charger may lead to overheating of the charger, the parameters are unstable, and then lead to charging voltage out of control, and eventually cause the battery bulge or explosion.

4、高温环境：高温会加速蓄电池内部的化学反应，产生更多气体，导致电池膨胀。

high temperature environment: High temperature will accelerate the chemical reaction inside the battery, produce more gas, resulting in battery expansion.

5、 使用寿命：理士蓄电池使用寿命较长后，内部化学反应会逐渐积累气体，导致电池壳体逐渐膨胀。

service life: After the battery has a long service life, the internal chemical reaction will gradually accumulate gas, resulting in the gradual expansion of the battery housing.

6、机械损伤：外力撞击或挤压可能会导致电池壳体或内部部件损坏，进而导致鼓包现象。

mechanical damage: external force impact or extrusion may cause damage to the battery housing or internal components, resulting in bulges.

7、内部短路：蓄电池内部发生短路现象也可能导致局部过热和气体释放，导致鼓包。

internal short circuit: Short circuit inside the battery may also lead to local overheating and gas release, resulting in bulges.

8、安全阀压力过高：电动车电池为了保证安全都会有一个安全阀，当电池内的压力上升，安全阀却打不开的时候，就会出现鼓包的情况。

广大用户了解这些原因后，要及时采取相应的预防措施，比如避免长时间过度充电，选择质量可靠的充电器，避免在高温环境中使用电池等，以减少蓄电池鼓包的风险。

the safety valve pressure is too high: electric vehicle battery in order to ensure safety will have a safety valve, when the pressure in the battery rises, the safety valve can not be opened, there will be a bulge situation.

After the majority of users understand these reasons, they should take appropriate preventive measures in a timely manner, such as avoiding overcharging for a long time, choosing a reliable charger, avoiding the use of batteries in high temperature environments, etc., to reduce the risk of battery bulges.