Installation and service

 

Inspection upon unpacking

Handling：   
Avoiding pull or push on terminals, to prevent damage of terminals and sealing of terminas.
Avoiding upside-down, impact, throw of batteries.
Avoiding metal rope, wire for handing, to prevent short-circuit of batteries.
Inspection：Package and appearance of batteries should be no sign of damage.
Counting out：batteries number, connectors and hardware are correct. 
Refer to installation drawing and manual for guide.
 

Cautions before installing

Batteries voltage should be in normal range. 
Insulation pad should be set under the batteries.
Begin installing only after no abnormality be found.
The position should be away from heat sources, such as a transformer.
The position should be away from spark sources, such as a fuse.
Clean or polish the terminals before connection of batteries.
Be careful to prevent the short circuit of battery positive and negative terminals by metal items.
Make sure the connection of batteries is correct before connecting the batteries to equipment. Connect the positive end of batteries to positive output terminal of the charger (the equipment), connect the negative end of the batteries to negative output terminal of the charger, otherwise damage of charger (equipment) or injure of body may occur.
 Use a torque wrench for adequate tightness of the connection. Recommended torque value is as table one.  
 
 
Table one Torque setting

Item

Terminal size

Value

1

M5

6.2N*m

1

M6

8.5N*m

2

M8

12.4N*m
 
The safe current value of our standard cable connectors for long duration is as follow
Cable 70mm2，220A/cable.
Cable 50mm2，170A/cable.
Cable 35mm2，130A/cable.
State clearly if working current is higher than above value and we will specify correct connectors for the application.
 

Connecting of batteries

Use isolated tools for the connecting. 
Connect batteries first, then connect batteries to charger and load.
Connect batteries in a string first, then connect strings in parallel.
Clearance between batteries no less than 20mm for better heat dissipation.
After connecting the cables with battery terminals, antirust such as vaseline may be applied onto the junction points.
Measure the total voltage of battery group before connect to power. 
 

How to use the batteries

Recharging  
Recharge the batteries before put into service to makeup the self-discharge during shipment and storage.
If no service for a long period of time, recharge the batteries on schedule.
Refer to table two for recharge schedule
Table two Storage temp. and recharge schedule

Temp. range

Recharge interval

Recharge parameters

Less than 20℃

Every 9 months

a) Constant voltage 3.5V/cell，initial current 0.1C(A), for12hours.

20℃～30℃

Every 6 months

b) Constant voltage 3.5V/cell，initial current 0.25C(A) for 6 hours.

30℃～40℃

Every 3 months

c) Constant current 0.1C（A） for 12hours.
Note：C means nominal capacity of the battery.
For example：The nominal capacity of LF12100 is 100AH，0.1C（A）=0.1X100=10A.
Charge voltage： 12V battery3.6X4=14.4V
 
Capacity test and end of discharge
Performance
Standard Test Condition
The battery shall be evaluated within 1 month from the arrival date. Unless otherwise stated in these
specifications, the following test shall be carried out in an ambient temperature of 20±5℃, relative
humidity of 65±20%. Discharge capacity when the battery is discharged at 20A to 10V after being standard
charged. Five cycles are permitted for this test. The test shall be terminated at the end of the first
cycle which meets the requirement.
Testing Instrument or Apparatus
Dimension Measuring Instrument
The dimension measurement shall be implemented by instruments with equal or more precision scale of 0.01mm specified.
Voltmeter and Ammeter
Voltmeters and ammeters shall be equal or more precision instruments of 10KΩ/V and 0.01Ω.
Impedance Meter
Impedance shall be measured by a sinusoidal alternating current method (1kHz LCR meter)
Standard Charge
Standard charge means charging for 6hours using 14.4V/0.2CA charger
Standard Discharge
Standard discharge means discharging at 0.2CA down to 10V
Electrical Performance

Item

Condition

Specification

Open-Circuit

Voltage

The open-circuit voltage shall be measured within 24hours after standard charge

≥13.3V

Battery Capacity

The discharge time at 20A shall be measured after

standard charge at 20±5℃ and rest 30mins

≥100%

Cycle Life

At the temperature of 20 ± 5 ℃, charge with 20A to the charge voltage, and then keep the charge voltage until the charging current

is ≤ 0.02C; Rest for 1 hour, discharge with 20A to the cut- off voltage; Rest for another 1 hour. Cycle 2000 times according to the above steps and record the discharge time.

≥80%

Charge(capacity)

retention

The discharge time at 20A shall be measured after

standard charge and then storage at 20±5℃ for 28 days.

≥94%

Temperature

Characteristic1

After standard charging at 20±5℃, laying the battery at 55℃ for 2 hour, then discharge at 20A to 10V, record the discharge time.

≥96%

Temperature Characteristic2

After standard charging at 20±5℃, laying the battery at-10℃ for 4hour, then discharge at 20A to 10V, record the discharge time.

≥80%
 
Mechanical Performance

Item

Condition

Specification

Crush Test

A battery is to be crushed between two flat surfaces. The force for the crushing is to be applied by a hydraulic ram with a 32mm diameter piston. The crushing is to be continued until a pressure reading of 17.2mmPa is reached on the hydraulic ram, applied force of 13kN. Once the maximum pressure has been obtained it is to be released.

No fire,

No explosion

Drop Test

The battery has only two axes of symmetry in which case only two directions shall be tested. The battery is to be dropped from a height of 1 meter twice onto concrete ground.

No explosion, No

fire,No smoke

Vibration

A full-charged battery is to be subjected to simple

harmonic motion with an amplitude of 1.6mm total maximum excursion. The frequency is to be varied at the rate of 1 hertz per minute between 10 and 55 hertz. The cell shall be vibrated for 30 minutes per axis o XYZ axes.

No explosion, No

fire,No smoke
 
 Cell Safety Performance

Item

Condition

Specification

Over charge

At 20±5℃, charging battery with constant current

1C to voltage 4V, then with constant voltage 4V till

current decline to 0. Monitor the temperature

No explosion, No fire

Over discharge

At 20±5 ℃ , according to the requirement

of the standard of discharge after discharge to

termination voltage, 30 mΩ external load

discharge within 24 hours.

No explosion, No fire

Short-circuit

At 20±5℃, Standard charge, across the electrodes

of the battery with a less than 50 m Ω wire

connection, 6 hours

No explosion, No fire The temperature of the

surface of the cell

are lower than 150℃

Heating

Battery is heated in a circulating air oven at a

rate of 5±2℃ per mins to 130℃, an then placed

30 mins at 130℃

No explosion, no fire
 

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