Soshine 12.8V24AH User manual

DOC: IFR12.8V24AH(4S4P)M5 Page 1Of 9 Pages
LiFePO4 Battery
12.8V24AH
Instruction Manual
Soshine International
www.soshine.com.cn
[email protected]

DOC: IFR12.8V24AH(4S4P)M5 Page 2Of 9 Pages
1 Model: IFR12.8V24AH(4S4P)M5
2 Application Condition
Customers should use the battery according to the following correct conditions of use, customer should apply BMS to monitor,
manage and protect each battery.
2.1 Authorization
Without authorization, the customer shall not modify or change the design and framework of the battery management system, to
make sure not to affect the performance of the battery.
2.2 Management files
Customer shall build the battery management files. The customer shall keep the monitoring data of the complete battery
operation as a reference for product quality responsibility.
The Soshine does not undertake the product quality assurance responsibility without the inspection data of the complete battery
system.
2.3 Management system requirements
The battery management system needs to meet the following basic requirements:
No.
Parameter
Specification
Protection Action
2.3.1
Absolute Charge
14.2V
Stop charging when the voltage reaches 14.2V
2.3.2
Absolute Discharge
10.8V (Min.)
Stop discharging when the battery voltage reaches 10.8V,
Minimize the current
2.3.3
Charge mode
CC/CV
Constant current charging to 14.2V, constant voltage charging
to 14.2V. Cutoff current 0.01C(240mA)
2.3.4
Short-circuit Protection
Disconnect
When a short circuit occurs, the battery is disconnected from the
over current
2.3.5
Over current Protection
According to 4.11, and
4.14
the battery management system controls the discharge current
to meet the specifications
2.3.6
Overheat Protection
According to4.16 and
4.17
The charge/discharge is terminated when the temperature
exceeds the specification of this specification
2.3.7
Charging Time Protection
Within 8 hours
Stop charging when charging time is over 8 hours
NOTES: As for above No. 11.3.1, 11.3.2, 11.3.4, 11.3.6 are warning clauses, the customer please note: when the battery
reaches any of these describe indicators and parameters, it means that the battery has already beyond the conditions of use, the
customer should be in accordance with the "protection" and other relevant provisions this specification of battery protection
measures, at the same time, Soshine statement on the using state of the battery does not undertake any guarantee responsibility
for the quality.
2.4 Charge
Charging current: The maximum charging current specified in the specification cannot be exceeded.
Charging voltage: Not exceed the highest limit voltage specified in the specification.
Charging temperature: The charging temperature of the battery must be performed in accordance with the temperature range of
the specification.
Charging method: Constant current and then constant voltage charging.

DOC: IFR12.8V24AH(4S4P)M5 Page 3Of 9 Pages
2.5 Discharge current
The battery discharge current cannot exceed the maximum discharge current specified in the specification. Excessive current
discharge will cause the battery to heat up and reduce its capacity.
2.6 Over-discharge
The battery may be permanently damaged when the battery voltage is less than 6V, and the product quality assurance of
Soshine will be invalid. According to 11.1.3.2 this specification, the internal energy consumption of the system should be reduced
to minimum when the discharge cut-off voltage is below 10.8V, and the storage time is prolonged before recharging. The
customer needs to train the user to recharge the battery in the shortest time to prevent the battery from over-discharge state.
2.7 Battery storage
If the battery is expected to be stored for more than 30 days, the SOC should be adjusted to about 30%. If the battery is expected
to be stored for more than 180days, the SOC should be adjusted to about 80% and the battery to be charged and discharged at
least once in the whole SOC range ( 10.8~14.2V) for every 90 days .
2.8 Charge at low temperatures
The battery should avoid charging (including standard charging, quick charging, emergency charging) in the low-temperature
conditions which is prohibited in this specification, otherwise, unexpected capacity reduction may occur. The battery
management system should be controlled according to the minimum charge and regenerative charging temperature. It is
forbidden to charge when temperature is lower than the temperature conditions specified in this specification. Otherwise, Soshine
shall not be liable for quality assurance
2.9 Battery heat diffusion
In the design of the electric box, the heat diffusion of the battery should be fully considered. Soshine shall not be responsible for
the quality assurance due to the overheating of the battery or battery caused by the design of the electric box.
2.10 Waterproof and dustproof
The waterproof and dustproof problem should be fully considered in the electrical box design, and the electric box must meet the
waterproof and dust-proof grade stipulated by the relevant national standards. Soshine is not responsible for quality assurance
due to the damage caused by the waterproof and dustproof problem (such as corrosion, rust, etc.).
3 Charger Requirements
3.1 Special charger for LiFePO4 battery
It is recommended to use a special charger for LiFePO4, constant current and constant voltage charging (fully charged cut-off
voltage 14.2V), with short circuit protection, overcharge protection, reverse connection protection, and anti-backfill function.
Charging current 12A (max).
3.2 Solar panel intelligent charge and discharge controller
Select LiFePO4 charger mode.
Constant current and constant voltage charging (fully charged cut-off voltage 14.2V), with short circuit protection, overcharge
protection, reverse connection protection, and anti-backfill function.
Charging current 12A (max)
3.3 Lead-acid battery charger
It is recommended to use three-stage charger with overcharge protection, and short-circuit protection.
Voltage range: charge cut-off voltage 13.5~4.6V, float voltage 13.7~3.8V, over discharge voltage 10.8~11V.
Charging current 12A (max)
Lead-acid chargers that meet the above requirements can be used, but the battery may be overcharged, and the long-term use
will shorten the life of some batteries or not fully charged, and the full capacity will be reduced by about 5% compared to the
normal capacity.

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4 Battery Specification
No.
Items
Specifications
Remark
4.1
Type
LiFePO4
Lithium iron phosphate
Nominal Capacity
24Ah
4.2
Capacity
Minimum Capacity
23.5Ah
0.2C Standard discharge & new battery status
4.3
Nominal Voltage
12.8V
Means operation voltage
4.4
Operation Voltage
10.8~14.2V
4.5
Absolute Charging
Voltage
14.2
±0.03V
By standard charge method, 3.55V max for unit
cell
4.6
Discharge Cut-off
Voltage
10.8V
2.7V for unit cell
4.7
Voltage
Delivery Voltage
12.8~13.2V
Within 10 days from factory
4.8
Standard Charging
Method
0.2C constant current, 14.2V constant voltage charge to 14.2V, continue charging till
current decline to ≤0.01C
4.9
0.2C(Standard)
4.8A
Standard charge, charge time about 7.5h(Ref)
4.10
0.5C
12A
Rapid charge, charge time about: 3h(Ref)
4.11
Charge Current
0.5C(Maximum)
12A
For continuous charging mode. Ambient
temperature 25°C
4.12
0.2C(Standard)
4.8A
constant current discharge to 10.8V
4.13
0.5C
12A
For continuous discharge mode. Ambient
temperature 25°C
4.14
Discharge Current
2C(Maximum)
24A
The surface temperature of the cells ≤60°C
4.15
Impedance
Battery Internal
<60mΩ
Internal resistance measured at AC 1KHZ new
battery after 50% charge new battery
4.16
Absolute Charge
0~45°C
60±25%R.H.
4.17
Absolute Discharge
-20~60°C
60±25%R.H.
4.18
Standard Charging
Temperature
25±2°C
4.19
Operation Temperature
and Relative Humidity
Range
Standard Discharging
Temperature
25±2°C
Battery Surface Temperature
Charge at a very low temperature such as below
0°C, will be get a lower capacity and reduce
cycle life of the battery.
Beyond the temperature range of charge and
discharge, the battery must stop working.
4.20
Storage Temperature
for a Long Time
-20~25°C
60±25% R.H.
Do not store for more than a year. It must be
charged once in storage for half a year.
4.21
Self-discharge Rate
Per Month
≤3.5%
New battery after stored more than 3 months.
4.22
Shipment Capacity
30% SOC (≥7.2Ah)
4.23
Weight
About 2.9±0.3kg
4.24
Cycle
>1000-2000 times
80% D.O.D.
4.25
Output Terminals
M5
4.26
Maximum Number of
Concatenations
Four in series
The dropout voltage between batteries ≤0.1V

DOC: IFR12.8V24AH(4S4P)M5 Page 5Of 9 Pages
5 BMS Specification
No.
Items
Specifications
5.1
Current
Operating current
≤24A
5.2
Temperature
Operating temperature
-40°C~ +85°C
5.3
Self-consumption
Operating state
≤100μA
5.4
Internal resistance
MOSFET
≤30mΩ
5.5
Protective voltage
3.90±0.05V
5.6
Restore voltage
3.60±0.1V
5.7
Overcharge protection
Overcharge protection delay
0.5S~2S
5.8
Protective voltage
2.0±0.1V
5.9
Restore voltage
2.70±0.1V
5.10
Over discharge protection delay
10~200mS
5.11
Over-discharge protection
Over current protection
150±30A
5.12
Protection delay
200~800us
5.13
Short circuit protection
Recovery conditions
Cut off the load
5.14
Charging temperature protection (battery)
75±5°C
5.15
Temperature protection
Discharge temperature protection (battery)
75±5°C
5.16
Start-up voltage
3.55±0.05V
5.17
Charge equalizer
Equalize the current
65±5mA

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6 Features
6.1 Superior “Useable” Capacity
Unlike with lead acid batteries, it is considered practical to regularly use 90% or more of the rated capacity of a
lithium battery bank, and occasionally more
6.2 Extended Cycle Life
in real use, standard quality LiFePo4 batteries can deliver at least 2000 charge/discharge cycles at 80% DoD
and 1C discharge rate, and the remaining capacity remains above 80%. These values are dependent on the
charge rate, the depth of discharge but more importantly on the quality of the cells used.
6.3 Voltage Sag Virtually Non Existant
The discharge curve of lithium batteries (especially relative to lead acid) is essentially flat – meaning that a 20%
charged battery will be providing nearly the same output voltage as an 80% charged battery.
This prevents any issues caused by the “voltage sag” common to lead acid as they discharge, but does mean
that any battery monitor or generator auto-start dependent upon voltage levels will likely not work well at all when
monitoring a lithium bank.
6.4 Size & Weight Advantages
The same capacity battery, lead-acid battery is twice the volume and three times heavier than the iron-lithium
battery
7 Charging Time & Discharging Time
7.1 Charging Time
Item
Specifications
Charge current
0.2C(4.8A)
5A
6A
0.5C(12A)
Charge mode
CC/CV
CC/CV
CC/CV
CC/CV
Charging time
7 hours
6.7 hours
5.6 hours
2.8 hours
7.2 Discharging Time
Item
Specifications
Discharge current
1A
0.1C(2.4A)
0.2C(4.8A)
0.5C(12A)
0.5C(24A)
Discharging time
24 hours
10 hours
5 hours
2 hours
1 hour

DOC: IFR12.8V24AH(4S4P)M5 Page 7Of 9 Pages
8 Battery Initial Dimensions and Label
8.1 Dimensions
8.2 Battery label
No.
Item
Unit: mm
1
Battery length
L 181±0.2
2
Battery width
W 167±0. 2
3
Battery height
H 77±0.2

DOC: IFR12.8V24AH(4S4P)M5 Page 8Of 9 Pages
9 Considerations for Different Charging Methods
Battery Surface Temperature
Standard Charge
Fast Charge
Fierce charge
＜0°C
Prohibited
Prohibited
Prohibited
＞45°C
Prohibited
Prohibited
Prohibited
0~10°C
0.2C
0.5C
Prohibited
10~20°C
0.5C
0.5C
Prohibited
20~45°C
0.5C
Prohibited
Prohibited
10 Battery Replacement
Battery life is limited. Customers should set up an effective tracking system to detect and record the internal resistance of the
battery. The measurement methods and calculation methods of internal resistance require customers and Soshine to discuss
and agree with both parties. When the battery internal resistance is more than 250% of the initial resistance, they should stop
using the battery. Any violation of the requirements shall be exempted from Soshine’s quality guarantee responsibility which
based on product sales contract and this specification.
11 Storage and Cycling Performance
No.
Parameter
Specification
Conditions
11.1
Recoverable Capacity
(Short time)
≥23.28Ah
New battery is charged to 50% SOC, then stored at 25°C for 28
days.
Test capacity according to the standard charge and discharge
conditions listed in Sections 4.9, 4.5 and 4.12, 4.6 of this
specification.
11.2
Recoverable Capacity
(Long time)
≥22.8Ah
New battery is charged to 50% SOC, then stored at 25°C for 180
days.
Test capacity according to the standard charge and discharge
conditions listed in Sections 4.9, 4.5 and 4.12, 4.6 of this
specification.
11.3
Absolute Storage Temperature
-20°C ~60°C
11.4
Capacity After Cycle
≥19.2Ah (1000
times cycle)
New Battery, cycled according to the standard charge/discharge 80%
D.O.D.

DOC: IFR12.8V24AH(4S4P)M5 Page 9Of 9 Pages
12 Period of Warranty
The period of warranty is one year from the date of shipment. Guarantees to give a replacement in case of batteries with
defects proven due to manufacturing process instead of the customer abuse and misuse.
13 Storage of the Batteries
The batteries should be stored at room temperature, charged to about 30% to 80% of capacity.
We recommend that batteries be charged about once per half a year to prevent over discharge.
14 Battery Performance Attenuation
Because batteries utilize a chemical reaction, battery performance will deteriorate over time even if stored for a long period of
time without being used. In addition, if the various usage conditions such as charge, discharge, ambient temperature, etc. are not
maintained within the specified ranges the life expectancy of the battery may be shortened or the device in which the battery is used
may be damaged by electrolyte leakage. If the batteries cannot maintain a charge for long periods of time, even when they are
charged correctly, this may indicate it is time to change the battery.
15 Note
Any other items which are not covered in this specification shall be agreed by both parties.
16 CAUTIONS IN USE
To ensure proper use of the battery please read the manual carefully before using it.
Handling
When charging and discharging, do not reverse the battery connection. The positive pole must correspond
to the positive pole, and the negative pole must correspond to the negative pole
Do not expose to, dispose of the battery in fire.
Do not put the battery in a charger or equipment with wrong terminals connected.
Avoid shorting the battery.
Avoid excessive physical shock or vibration.
Do not disassemble or deform the battery.
Do not immerse in water.
Do not use the battery mixed with other different make, type, or model batteries.
Keep out of the reach of children.
Don’t transport and store the battery together with metal objects such as necklaces, hairpins.
Don’t pierce the battery with a nail or other sharp object.
Charge and discharge
Battery must be charged in appropriate charger only.
Never use a modified or damaged charger.
Do not leave battery in charger over 24 hours.
Storage
Store the battery in a cool, dry and well-ventilated area.
Disposal
If the battery beyond the useful-life, please fully discharged, sticks the battery with insulating
tape, then put the battery to the specialized recycle bin.
Regulations vary for different countries. Dispose of in accordance with local regulations.