Battery Safety

Basic Requirements

Before operating batteries, carefully read the safety precautions for battery handling and master the correct battery connection methods.

• Do not expose batteries at high temperatures or around heat-generating devices, such as sunlight, fire sources, transformers, and heaters. Excessive heat exposure may cause the batteries to explode.
• Do not burn batteries. Otherwise, the batteries may explode.
• To avoid leakage, overheating, fire, or explosions, do not disassemble, alter, or damage batteries, for example, insert sundries into batteries or immerse batteries in water or other liquids.

• Wear goggles, rubber gloves, and protective clothing to prevent skin contact with electrolyte in the case of electrolyte overflow. If a battery leaks, protect the skin or eyes from the leaking liquid. If the skin or eyes come in contact with the leaking liquid, wash it immediately with clean water and go to the hospital for medical treatment.
• Use dedicated insulated tools.
• Move batteries in the required direction. Do not place a battery upside down or tilt it.
• Keep the battery loop disconnected during installation and maintenance.
• Use batteries of specified models. Using batteries of other models may damage the batteries.
• Dispose of waste batteries in accordance with local laws and regulations. Do not dispose of batteries as household waste. If a battery is disposed of improperly, it may explode.
• The site must be equipped with qualified fire extinguishing facilities, such as firefighting sands and powder fire extinguishers.

To ensure battery safety and battery management accuracy, use batteries provided with the UPS by Huawei. Huawei is not responsible for any battery faults caused by batteries not provided by Huawei.

Battery Installation

Before installing batteries, observe the following safety precautions:

• Install batteries in a well-ventilated, dry, and cool environment that is far away from heat sources, flammable materials, moistures, extensive infrared radiation, organic solvents, and corrosive gases. Take fire prevention measures.
• Place and secure batteries horizontally.
• Note the polarities when installing batteries. Do not short-circuit the positive and negative poles of the same battery or battery string. Otherwise, the battery may be short-circuited.
• Check battery connections periodically, ensuring that all bolts are securely tightened.
• When installing batteries, do not place installation tools on the batteries.

Battery Short Circuit

Battery short circuits can generate high instantaneous current and release a great amount of energy, which may cause equipment damage or personal injury.

To avoid battery short-circuit, do not maintain batteries with power on.

Flammable Gas

• Do not use unsealed lead-acid batteries.
• To prevent fire or corrosion, ensure that flammable gas (such as hydrogen) is properly exhausted for lead-acid batteries.

Lead-acid batteries emit flammable gas when used. Ensure that batteries are kept in a well-ventilated area and take preventive measures against fire.

Battery Leakage

Battery overheating causes deformation, damage, and electrolyte spillage.

When the electrolyte overflows, absorb and neutralize the electrolyte immediately. When moving or handling a battery whose electrolyte leaks, note that the leaking electrolyte may hurt human bodies.

• If the battery temperature exceeds 60°C, check for and promptly handle any leakage.
• Electrolyte overflow may damage the equipment. It will corrode metal parts and boards, and ultimately damage the boards.
• If the electrolyte overflows, follow the instructions of the battery manufacturer or neutralize the electrolyte by using sodium bicarbonate (NaHCO₃) or sodium carbonate (Na₂CO₃).

Lithium Battery

The safety precautions for lithium batteries are similar to those for lead-acid batteries except that you also need to note the precautions described in this section.

There is a risk of explosion if a battery is replaced with an incorrect model.

• A battery can be replaced only with a battery of the same or similar model recommended by the manufacturer.
• When handling a lithium battery, do not place it upside down, tilt it, or bump it with other objects.
• Keep the lithium battery loop disconnected during installation and maintenance.
• Do not charge a battery when the ambient temperature is below the lower limit of the operating temperature (charging is forbidden at 0°C). Low-temperature charging may cause crystallization, which will result in a short circuit inside the battery.
• Use batteries within the allowed temperature range; otherwise, the battery performance and safety will be compromised.
• Do not throw a lithium battery in fire.
• When maintenance is complete, return the waste lithium battery to the maintenance office.