Battery Safety

Statement

The Company shall not be liable for any damage or other consequences to the batteries it provides due to the following reasons:

• Batteries are damaged due to force majeure such as earthquakes, floods, volcanic eruptions, debris flows, lightning strikes, fires, wars, armed conflicts, typhoons, hurricanes, tornadoes, and extreme weather conditions.
• Batteries are damaged because the onsite equipment operating environment or external power parameters do not meet the environment requirements for normal operation, for example, the actual operating temperature of batteries is too high or too low, or the power grid is unstable and experiences outages frequently.
• Batteries are damaged, fall, leak, or crack due to improper operations or incorrect connection.
• After being installed and connected to the system, the batteries are not powered on in time due to your reasons, which causes damage to the batteries due to overdischarge.
• Batteries are damaged because they are not accepted in time due to your reasons.
• You set battery operating parameters incorrectly.
• You use batteries of different types together, causing acceleration of capacity attenuation. For example, you use our batteries together with batteries of other vendors or with batteries of different rated capacity.
• Batteries are frequently overdischarged due to your improper maintenance, you expand the load capacity without notifying us, or have not fully charge batteries for a long time.
• You do not perform battery maintenance based on the operation guide, such as failure to check battery terminals regularly.
• Batteries are damaged because you do not store them in accordance with storage requirements (for example, in an environment that is damp or prone to rain).
• Batteries are not charged as required during storage due to your reasons, resulting in capacity loss or other irreversible damages to the batteries.
• Batteries are damaged due to your or a third party's reasons, for example, relocating or reinstalling the batteries without complying with the Company's requirements.
• You change the battery use scenarios without notifying the Company.
• You connect extra loads to the batteries.
• The battery storage period has exceeded the upper limit.
• The battery warranty period has expired.

General Requirements

The category 3 (C3) battery is intended for commercial and industrial application in the second class environment. Installation restrictions or additional measures may be needed to prevent interference.

• Use batteries within the specified temperature range. When the ambient temperature of the batteries is lower than the allowed range, do not charge the batteries to prevent internal short circuits caused during low-temperature charging.
• Do not reversely connect the positive and negative battery terminals. Otherwise, a battery alarm will be generated and batteries may be damaged.
• Before unpacking batteries, check whether the packaging is intact. Do not use batteries with damaged packaging. If any damage is found, notify the carrier and manufacturer immediately.
• In an indoor scenario, you are advised to power on a battery within seven days after unpacking. If the battery cannot be powered on in time, place it in a dry indoor environment without corrosive gas.
• Do not use batteries that are faulty or damaged (such as damage caused when a battery is dropped, bumped, bulged, or dented on the enclosure). Damaged batteries may release flammable gases. Do not store damaged batteries near other equipment or flammable materials. Only professionals are allowed to access the batteries.
• Before working on a battery, ensure that there is no irritant or scorched smell around the battery.
• When installing batteries, do not place installation tools, metal parts, or sundries on the batteries. After the installation is complete, clean up the objects on the batteries and the surrounding area.
• If a battery is accidentally exposed to water, do not install it. Move it to a safe place for isolation and contact technical engineers in a timely manner.
• Check whether the positive and negative battery terminals are grounded unexpectedly. If so, disconnect the battery terminals from the ground.
• Do not perform welding or grinding work around batteries to prevent fire caused by electric sparks or arcs.
• If batteries are left unused for a long period of time, store and recharge them according to the battery requirements.
• Do not charge or discharge batteries by using a device that does not comply with local laws and regulations.
• Keep the battery loop disconnected during installation and maintenance.
• Monitor damaged batteries during storage for signs of smoke, flame, electrolyte leakage, or heat.
• If a battery is faulty, its surface temperature may be high. Do not touch the battery to avoid scalds.

Short-Circuit Protection

• When installing and maintaining batteries, wrap the exposed cable terminals on the batteries with insulation tape.
• Avoid foreign objects (such as conductive objects, screws, and liquids) from entering a battery, as this may cause short circuits.

Leakage Handling

Electrolyte overflow may damage the equipment. It will corrode metal parts and boards, and ultimately damage the boards.

Electrolyte is corrosive and can cause irritation and chemical burns. Should you come into direct contact with the battery electrolyte, do as follows:

• Inhalation: Evacuate from contaminated areas, get fresh air immediately, and seek immediate medical attention.
• Eye contact: Immediately wash your eyes with water for at least 15 minutes, do not rub your eyes, and seek immediate medical attention.
• Skin contact: Wash the affected areas immediately with soap and water and seek immediate medical attention.
• Intake: Seek immediate medical attention.

Battery Room Fire Safety

The fire safety of the battery room must comply with local laws and regulations as well as applicable standards such as NFPA 855-2020, NEN-1010, or GB 50016, and meet the following requirements:

• The battery room must not be located in environments where explosive gases may exist or be released.
• The battery room must not be located near or under areas with water leakage risks, such as water reservoirs, water landscapes, and water towers.

• It is recommended that an independent battery room be used. If the total battery capacity exceeds 600 kWh (for example, more than seven cabinets each with a battery capacity of 80 kWh are deployed), an independent battery room must be used.
• The indoor layout of batteries should comply with local fire protection laws and regulations in aspects such as production scenarios and the safe distance and layout of buildings and materials.
• Do not store combustible materials in the battery room. Keep such materials at least 3 m away from the battery room.
• A battery room deployed outdoors should be at least 3.0 m away from the following places: restricted areas, combustible warehouses, dangerous goods, high-stacking warehouses, power infrastructure, public roads, and buildings.
• The battery room should be isolated from the adjacent area by fire compartmentation. Holes should be sealed by firestop material. The fire resistance and thermal insulation capabilities should be the same as that of the partition wall.
• The battery room should be equipped with fire extinguishers filled with halogenatedane, heptafluoropropane, perfluorohexanone, carbon dioxide, or dry powder. Each fire protection unit should be equipped with at least two fire extinguishers, which should be checked and replaced periodically.
• The battery room should be equipped with cabinet-level or room-level CO sensors, smoke sensors, and temperature sensors. It is recommended that H₂ sensors and open flame sensors be deployed. At least two sensors of each type should be deployed, and the automatic fire alarm system should be enabled.
• The battery room should be equipped with independent air conditioners and ventilation ducts, which must be isolated from those for other equipment areas or office areas. If ventilation ducts are shared, fire dampers must be installed for the battery room. The ventilation and exhaust system must interact with the fire alarm system and be able to handle flammable gases with a concentration lower than 25% lower flammability limit (LFL).
• The battery room should be equipped with a halogenatedane or perfluorohexanone gas fire extinguishing system, which should interwork with the fire alarm system. After the extinguishing agent is released, the battery room should meet the requirement on flame extinguishing concentration within 10 min.
• The battery room should be equipped with fire extinguishing facilities such as a dry-type water spray or water mist pipe network to cope with the risk of reignition or fire spreading after the battery fire is extinguished.
• The battery room should be equipped with pressure relief explosion-proof devices or pressure relief channels (such as glass windows and magnetic lock doors) with equivalent areas. According to the NFPA 68 or GB 50016 standard, if side pressure relief is adopted, a protective fence or wall should be installed outside the pressure relief channels, and the fence or wall should be at least 12 m away from the pressure relief wall.
• The fire alarm system should interact with the ventilation and exhaust system and automatic fire extinguishing system, able to trigger the energy storage system to disconnect the charging and discharging circuits.
• Fire alarms in the battery room should be automatically reported to the fire supervision center. If the battery room is unattended, an automatic fire alarm system must be deployed to report fire alarm signals to the remote management center.

Recycling

• Dispose of waste batteries in accordance with local laws and regulations. Do not dispose of batteries as household waste. Improper disposal of batteries may result in environmental pollution or an explosion.
• If a battery leaks or is damaged, contact technical support or a battery recycling company for disposal.
• If batteries are out of service life, contact a battery recycling company for disposal.
• Do not expose waste batteries to high temperatures or direct sunlight.
• Do not place waste batteries in environments with high humidity or corrosive substances.