Material Delivery Check

There must be a battery charge label on the packing case. The charge label must specify the latest charge time and the next charge time.

Storage Requirements

• Ensure that batteries are stored in a dry, clean, and ventilated indoor environment that is free from sources of strong infrared or other radiations, organic solvents, corrosive gases, and conductive metal dust. Do not expose batteries to direct sunlight or rain and keep them far away from sources of heat and ignition.
• If a battery is faulty (with scorch, leakage, bulge, or water intrusion), move it to a dangerous goods warehouse for separate storage. The distance between the battery and any combustible materials must be at least 3 m. The battery must be scrapped as soon as possible.
• Place batteries correctly according to the signs on the packing case during storage. Do not place batteries upside down, lay them on one side, or tilt them. Stack batteries in accordance with the stacking requirements on the packing cases.
• Store batteries in a separate place. Do not store batteries together with other devices. Do not stack batteries too high. The site must be equipped with qualified fire fighting facilities, such as fire sand and fire extinguishers.
• After batteries are powered off, static power consumption and self-discharge loss may occur in internal modules, which may cause battery damage due to overdischarge. Do not store batteries in low SOC and charge batteries in a timely manner. Permanent battery faults caused by delayed charge are not covered by the warranty. Storing the batteries in low SOC occurs in scenarios including but not limited to the following:
  • The power cables or signal cables are not connected.
  • The batteries cannot be charged due to a system fault after discharge.
  • The batteries cannot be charged due to incorrect configurations in the system.
  • The batteries cannot be charged due to long-term mains failure.
  • The batteries cannot be charged because the switch of the Smart Rack Controller, Smart PCS, or main loop component is off.

It is recommended that batteries be used soon after being deployed onsite. Batteries that have been stored for an extended period shall be charged periodically. Otherwise, they may be damaged.

• Packaging label description

  Label	Description
  	This way up: The package shall be vertically oriented during transport and storage.
  	Fragile: The package contains fragile objects and shall be handled with care.
  	Keep dry: The package shall be kept away from rain.
  	Stacking limit by number: The packages shall not be vertically stacked beyond the specified number. The actual label may vary.

• The storage environment requirements are as follows:
  • Ambient temperature: –40°C to +60°C (0°C to 30°C are recommended. If batteries are stored at a temperature higher than 40°C for extended periods, the battery performance and service life may be deteriorated.)
  • Relative humidity: 5%–95% RH (recommended: about 45% RH)
  • Dry, clean, and well-ventilated
  • Away from corrosive organic solvents and gases
  • Away from direct sunlight
  • At least 2 m away from heat sources
• The batteries in storage must be disconnected from external devices. The indicators (if any) on the batteries must be off.
• The storage duration starts from the latest charge time labeled on the battery package. If a battery is qualified after charge, update the latest charge time (recommended format: YYYY-MM-DD HH:MM) and the next charge time (Next charge time = Latest charge time + Charge interval) on the label.
• The following table lists the maximum charge intervals for batteries delivered separately. Charge the batteries promptly and calibrate the SOC to at least 50%. Otherwise, the battery performance and service life may be deteriorated.

  Storage Temperature (T)	Maximum Charge Intervala
  –40°C < T ≤ +30°C	15 months
  30°C < T ≤ 40°C	11 months
  40°C < T < 60°C	7 months
  Note a: The interval starts from the latest charge time labeled on the battery package.

• When stored in low SOC, the batteries must be charged within the maximum interval corresponding to the SOC when the batteries are powered off. If the batteries are not charged within the specified interval, they may be damaged due to overdischarge.

  Power-Off SOC Before Storage	Maximum Charge Interval
  SOC ≥ 50%	Refer to the charge intervals for batteries delivered separately.
  5% ≤ SOC < 50%	20 days
  SOC < 5%	48 hours

• Do not unpack batteries. If charging is necessary, they must be charged by professionals as required and then returned to their original packaging after charging.
• The warehouse keeper shall collect battery storage information every month and periodically report the battery inventory information. The batteries in long-term storage shall be charged in a timely manner.
  • Only trained and qualified personnel are allowed to charge batteries. Wear insulated gloves and use dedicated insulated tools during the operation.
  • Observe onsite during charge and handle any exceptions in a timely manner.
  • If a battery experiences an abnormality such as bulging or smoking during charge, stop charging immediately and dispose of it.
• AC mains input voltage requirements for charging:
  • 220 V (three-phase 260–530 V AC or single-phase 176–300 V AC)
  • 110 V (three-phase 130–265 V AC or single-phase 90–175 V AC)
  • AC input power cables used for charging in the warehouse must have a through-current capacity greater than 23 A.
• If batteries have been stored for longer than allowed, promptly report the event to the person in charge.
• Ensure that batteries are delivered based on the "first in, first out" rule.
• Handle batteries with caution to avoid damage.

Conditions for Determining Overdue Storage of Battery Packs

• Do not store batteries for extended periods.
• The following table lists the maximum charge intervals for batteries delivered separately. Charge the batteries promptly and calibrate the SOC to at least 50%. Otherwise, the battery performance and service life may be deteriorated.

  Storage Temperature (T)	Maximum Charge Intervala
  –40°C < T ≤ +30°C	15 months
  30°C < T ≤ 40°C	11 months
  40°C < T < 60°C	7 months
  Note a: The interval starts from the latest charge time labeled on the battery package.

• If batteries have been stored for longer than allowed, promptly report the event to the person in charge.
• Dispose of deformed, damaged, or leaking batteries directly irrespective of how long they have been stored.
• The storage duration starts from the latest charge time labeled on the battery package. If a battery is qualified after charge, update the latest charge time (recommended format: YYYY-MM-DD HH:MM) and the next charge time (Next charge time = Latest charge time + Charge interval) on the label.
• Batteries can be charged for a maximum of three times during storage. Dispose of batteries if the maximum charge times are exceeded.

Preparing Charging Devices

• Multimeter
• Clamp meter
• Insulated torque socket wrench
• Charger

Inspection Before Charge

1. Before charging a battery, you need to check its appearance. Charge the qualified battery or dispose of the unqualified one.
2. The battery is qualified if it is free from the following symptoms:
   • Deformation
   • Shell damage
   • Leakage
3. Check that the accessories are complete based on the packing list delivered with the charger.

Full Charge Strategy

The charging ambient temperature ranges from 15°C to 40°C.

Charging Procedure

Prepare the battery qualified for charge.

1. Connect the communications port on the charger to the COM-2 and 48V-2 ports on the battery using the CAN communications cable (48 V) delivered with the charger.
2. Connect the positive and negative cable ports on the charger to the positive and negative ports on the battery using the positive and negative DC input power cables delivered with the charger.
3. Connect the AC INPUT port on the charger to the utility power source using the power cable delivered with the charger.
4. Turn on the AC circuit breaker of the charger.
5. Turn on the DC circuit breaker of the charger.
6. Operate the charger according to its manual.
7. After the charge and discharge are complete, wait until the fan in the charger keeps running for about 5 minutes to dissipate the residual heat, turn off the AC and DC circuit breakers, and remove the cables.