ROCKSOLAR 24V LiFePO4 Lithium Iron Phosphate Battery User Manual

**ROCKSOLAR 24V LiFePO4 Lithium Iron Phosphate Battery User Manual

**

Features of LiFePO4 Battery

• Longer Cycle Life: Offers up to 20 times longer cycle life and five times longer float/calendar life than lead acid battery, helping to minimize replacement cost and reduce total cost of owner.
• Lighter Weight: About 40% of the weight of a comparable lead acid battery. A ‘drop in’ replacement for lead acid batteries.
• Higher Power: Delivers twice power of lead acid battery, even high discharge rate, while maintaining high energy capacity.
• Wider Temperature Range: -20°C~+60°C.
• Superior Safety: Automatic protection with internal battery management system. Lithium Iron Phosphate chemistry eliminates the risk of explosion or combustion due to high impact, overcharging or short circuit situation.
• Increased Flexibility: Modular design enables deployment of up to four batteries in series and up to ten batteries in parallel.

Application

RV, Electric vehicles, Boat; Solar/wind energy storage system; UPS, backup power: Telecommunication; Medical equipment;   Lighting.

Warranty

Limited Warranty
ROCKSOLAR LLC. provides a non-transferable warranty to the purchaser of ROCKSO- LAR product purchased from an authorized ROCKSOLAR reseller, ROCKSOLAR LLC. warrants to the original consumer purchaser that the ROCKSOLAR product will be free from defects in workmanship and material under normal consumer use during the applicable warranty period identified in the Warranty Period’ section below, subject to the exclusions set forth below. This warranty statement sets forth ROCKSOLAR’s total and exclusive warranty obligation. We will not assume, nor authorize any person to assume for us, any other liability in connection with the sale of our products.

Warranty Period
The warranty period for portable power stations is 12 months, while the warranty period for LiFePO4 batteries is 11 years. In each case, the warranty period is mea- sured starting on the date of purchase by the original consumer purchaser. The sales receipt from the first consumer purchase, or other reasonable documentary proof, is required in order to establish the start date of the warranty period.

Remedy
ROCKSOLAR’s entire liability and your exclusive remedy for any ROCKSOLAR product that is not operating in accordance with its published technical specifications are at ROCKSOLAR’s discretion: replace the product at ROCKSOLAR’S expense. This warranty obligation is conditioned upon the hardware being returned to the original place of purchase, or another place as directed by ROCKSOLAR, with the original sales receipt attached. You may be required to pay shipping and handling charges, as well as any applicable tariffs, duties, taxes, or other fees. ROCKSOLAR may, at its discretion, provide new or refurbished products.

Limited to Original Consumer Buyer
The warranty on ROCKSOLAR’S product is limited to the original consumer purchaser and to any subsequent owner.

LIMITATION OF LIABILITY
ROCKSOLAR shall not be liable for any special, incidental, indirect, or consequential damages whatsoever, including, but not limited to loss of profits, revenue, or data (whether direct or indirect) or commercial loss for breach of any express or implied warranty on your product even if ROCKSOLAR has been advised previously of the possibility of such damages. Some local laws do not allow the exclusion or limitation of special, indirect, incidental, or consequential damages, so this limitation or exclusion may not apply in your jurisdiction.

Exclusions
The warranty does not cover failures resulting from incorrect handling, product modifi- cations, installation, conversion or additions, supplements, operation, natural elements (weather), excessive or deficient energy supply, chemicals, the effect of solid bodies, or deliberate damage. If the Warrantor determines that the problem with the ROCKSO- LAR product(s) is not due to a manufacturing defect in the Warrantor’s workmanship or materials, or otherwise does not qualify for warranty repair, then the Purchaser will be responsible for all costs incurred by the Warrantor necessary to repair, replace and transport the ROCKSOLAR product(s). ROCKSOLAR’s warranty does not apply to the battery call unless the battery cell is fully charged by you within seven days after you purchase the product and at least every 3 months thereafter.

How to Receive Service
To obtain warranty service, contact our customer service team at support @rockso-lars.com

Battery Specification

MODE L| 24V 5 OA h| 24V IOO Ah| 2 4VI5 O Ah| 24V200 iAh
---|---|---|---|---
Normal Voltage| 25.6V
Nominal Capacity| 50Ah| 1OOAh| 15OAh| 200Ah
Standard Charge Voltage| 128OWh| 256Wh| 340Wh| 5120Wh
Standard Charge Voltage•| 28.8(29.2V Max.)
Allow Max Charge Current| 5D| 100A| 100A| 100A
Max Discharger Current| 5D| 100A| 100A| 100A
Peak Discharge Current 10s| 100A| 200A| 200A| 200A
Terminal| F12MB| F12MB| F12MB| F12MB
Dimension  L’W“H| 13.0*0 8•8.4 in| 20 S’ 5.4’8.6 in| 20.5•3 4•6. G in| 20 5’9.4•8.6 in
| | | |
Temperature| Charge temperature  :0°C~+45°C f Discharge temperature  <2070~ = 60°C
Cycle Life| =2000 cycles @1C 100%000 [ = B000 cycles @0,5C 504 DOD

BMS – Battery Management System

15i5S orb.
b )Discharge> 2A orc
c )< *50’t andd.
d )Charge Current <0.5C
1.0-1.5C| Delay 3-10S
1.5-3.0C| Delay 1-3S

3.0C| >0•C or Delay 50-150mS
|
Discharging| <1.0C| Temperature Protection| a) Cut Discharge 15255 or
b) Charge> 2A or
c). < •55IC and >-20•Cord
d) Discharge Current <0.5C
c 2.0C| Temperature Protection
3.0-4.0C| Delay 50- 150m S
4.0-10C| Delay 5- 15mS
10C| Delay 300 – 800uS
Voltage| Charging| Baller| 329.6V.Oelay 1-2S| a. 528.0V or
b. Discharge>2A
Single
Cell| 253.65V.Delay 1-25| a. 43.5Vor
b. Discharge>2A
Discharging| Bel1orY| 419.2V,Delay 1-2S| a. 322.8V or
b .Chargo >2A
Single
Cell| (2.3V.Delay 1-25| a. 02.7V or
b.Charge>2A
temp•
era lure| Battery| Charging| 40’C or 3+50°C| +5•C or 4+45°C
Dscilargng| 4-20°C or    4.7C1C| -10•C or 4+60°C
BA1S| 34-80•C| +80°C
Balance for single cell| Voltage| A3.551/•Delay 1-10S| a. Cut Charging or
Current| 38±10mA| b. Vollage53.5V

Explain: “C” represents the Battery Nominal Capacity. Charging

About Charging Voltage
Based on the characteristics of Lithium Iron Phosphate(LiFePO4) batteries, the voltage measured by all LiFePO4 batteries during charging is not the real voltage of the battery. Therefore, after charging and disconnecting the battery from the power source, the voltage of the battery will gradually drop to its real voltage. If you need to test the real voltage of the battery, please charge and disconnect the power supply and test its voltage after putting it aside for over 15 mins.

Charging Methods
Use 29.2V lithium battery charger to maximize the capacity. Recommend Charging Voltage: Between 28.4V to 29.2V Recommend Charging Current: 0.2C The battery will be fully charged in around 5hrs to 100% capacity. 0.5C The battery will be fully charged in around 2hrs to around 97% capacity.

Inverter/Controller

• Select 24V(29.2V)LI(LiFePO4) Made” or
• Select “User Mode” to enter values according to below parameters

CHARGING

Charging Limit Voltage : 29.2V Over
Voltage Disconnect Voltage : 30.0V
Over Voltage Reconnect Voltage : 28.4V
Equalizer Charging Voltage : 28.0V
Float Charging Voltage: 27.6V
Boost Charging Voltage: 27.6V
Boost Reconnect Charging Voltage: 26.4V

DISCHARGING

Low Voltage Disconnect Voltage: 21.6V
Low Voltage Reconnect Voltage: 24.8V
Under Voltage Warning Voltage :23.2v
Under Voltage Warning Reconnect Voltage : 24.0V
Discharging Limit Voltage: 20.8V
Over Discharge Disconnect Voltage: 20.8V
Over Discharge Reconnect Voltage:   23.2V
Over-Discharge Delay Time: 0.85

OTHERS

Equalize Duration: 120min
Boost Interva:   Not Suitable for Lithium Batteries
Boost Duration : 120min

State of Charge(SOC)
The battery capacity could be roughly estimated by its voltage. As there are subtle differences in the voltage of each battery, below parameters are for reference only. The voltage needs to be tested at rest(with zero current) after 15 mins of disconnecting from charger &loads.

Long-Term Storage
The battery can be operated in temperature of -20°C to +60°C, and a tempera- ture between +10°C to +35°C is ideal fr long-term storage. Store in a fireproof container and away from children. -For a longer-lasting product, it is best to store your battery at 100% charge level and recharge every three months if it is not going to be used for a long period of time.

Parallel And Series Batteries
Connection Tips
Check as below before connecting batteries in series or parallel:
a. connect batteries with same capacity(Ah) ONLY.
b. connect batteries with the same brand ONLY.

Two Necessary Steps Before Connecting
These two steps are necessary in order to reduce the voltage difference between batteries, and through these, the battery system can perform the best of it in series or/and in parallel.
Step 1: Fully charge your batteries separately.
Step 2: Connect your batteries one by one inparallel, and leave them together for 12-24hrs. And then, you can connect your batteries

Parallel connection of batteries

Capacity of
parallel battery| Battery
Numbers| Limited
Charge Voltage| Discharge
Cut-off voltage
---|---|---|---
12.8ViCapacIty1| 1 PCS| 29.2V| 21.6V
12.8WCapaclty2| 2PCS| 29.2V| 21.6V
12.8V/Capacity3| 3PCS| 29.2V| 21.6V
12.8V/Capacityrn| n410PCS| 29.2V| 21.6V

Battery in series

Inverter/ Charger Type| battery           Numbers| Limited Charge Voltage| Discharge Cut-off voltage
---|---|---|---
24V| 1PCS| 29.2V| 21.6V
48V| 2PCS| 58.4V| 43.2V

Notes for series and parallel connection:

• Fully charge all the battery firstly, then connect them in series or parallel. The number of batteries in series is 2PCS, and the number of batteries in parallel is 10PCS.
• Do not mix in series or parallel with lead-acid batteries or different types of lithium batteries; Only use batteries with the same type and same capacities.
• Battery series and parallel connections need to be charged according to the standard charging voltage in the above table, and a special charger for lithium batteries is recommended; (Follow note as above when selecting proper chargers)

Curve Of Lithium Iron Phosphate Battery

**Charging curve

**

Discharge Curve

Discharge Time

Discharge Cycle Life Curve/Self Discharge Curve

Number Of Cycles

Storage Time( Months)

How To Activate The Battery
If the BMS has cut-off the battery for protection, you need to cut off the load of the battery and put the battery aside for 30mins. Then the battery will automatically recover itself to normal voltage and can be used after fully charged.

If the battery is unable to recover itself and its voltage is too low to hold a charge, you can activate it in below two ways:

1. Use the charger with OV charging function (it can charge the battery starting from DV)to charge the battery. After fully charged the battery can be used normally.
2. Use another 24V lithium battery to connect in parallel with the battery for a minute to activate the battery (lead-acid battery at voltage between 24V and 29.2V will also work). After that, fully charge the battery and it can be used normally.

Warning & Tips.

1. DO NOT disassemble or alter the battery.
2. DO NOT reversely connect or short-circuit the positive and negative poles of the battery.
3. DO NOT soak the battery in water, especially sea water.
4. DO NOT throw the battery into fire. \
5. DO NOT Heat above 70°C/158°F.
6. DO NOT use the wrong charger with output below 27.0V or over 30.0V. 12

Troubleshooting

Can not discharge.

1. Check whether the battery is securely connected.
2. Check whether the positive and negative battery terminals are correctly connected.
3. Check whether the battery voltage is greater than 24V. If it is less than 24V, charge the battery first.
4. Check whether the load voltage matches the battery.
5. Check whether the load current is greater than the battery discharge current, Make sure it is less than the battery discharge current.
6. Ensure that the ambient discharge temperature ranges from -15°C to +55°C.

Can not charge

1. Check whether the battery is securely connected.
2. Check whether the positive and negative battery terminals are correctly connected.
3. Check the charging voltage matches the battery, the charging parameters are set correctly.
4. Check whether the charging current is greater than the maximum charging current of the battery, Make sure it is less than the maximum charging current of the battery.
5. Check whether the battery voltage is less than 18V. If it is less than 18V, use the charger with OV charging function to charge.
6. Ensure the charging environment temperature ranges from 0°C to +45°C.
7. After the battery is protected by over-discharge, disconnect the load and wait for the battery to recover the voltage before charging, or use the charger with OV charging function to charge.

Battery heats up

1. Check whether the battery is securely connected. The connecting wire should be in contact with the battery terminal. Do not clamp screws to discharge.
2. Check whether the battery cable matches the working current. 6AWG-100A, 4AWG-150A, 2AWG-200A cable is recommended.
3. Check whether the load power exceeds the battery discharge power, ensure the load power is lower than the required battery power.
4. Ensure the working temperature is lower than 55 °C.=

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