SVB-31502 Marine Lithium Batterie Instructions

SVB-31502 Marine Lithium Batterie

Product Specifications

• Model: SVB-# 31502
• Brand: ECO WORTHY
• Type: Marine Lithium-Batteries LiFePO4
• Voltage: 12.8 V
• Capacity: 150 Ah

Product Usage Instructions

Safety Precautions
Before using the Marine Lithium-Batterie, please read and understand all safety instructions provided in the user manual.

Installation
Ensure the battery is compatible with your marine system’s requirements. Follow the manufacturer’s instructions for proper installation.

Charging

Frequently Asked Questions (FAQ)
Q: Can I use this battery for my RV?
A: The Marine Lithium-Batterie is designed for marine use, but you can check with the manufacturer for compatibility with RV systems.

SVB-# 31502 ECO WORTHY Marine Lithium-Batterie LiFePO4 / 12.8 V / 150 Ah

WARNING

• Cannot be used as starter battery!
• Do not charge below 0 °C
• Do not discharge below -20 °C
• Do not exceed nominal voltage and current when charging /discharging.
• Charge battery separately or in series with equaliser.
• Stop charging immediately if battery swells.
• Charge battery at least every 6 months.

PLEASE NOTE

• Keep warm in cold weather for higher discharge rate.
• High temperature may reduce battery cycle times. It is recommended to keep operating temp below 60 °C / 140 °F
• Supports up to 4 batteries in series & 4 in parallel connection.

BATTERY VOLTAGE AND ACTUAL CAPACITY

PLEASE READ THE MANUAL BEFORE USE!

• Do not use as a starter battery!
• Ensure proper installation and correct polarity (plus (+) and minus (-) markings).
• Only use compatible chargers and do nit exceed the maximum charging and discharging currents! Protect from heat. Temperatures above +60 °C can damage the battery.
• Avoid damage of any kind, for example from dropping,drilling or similar (risk of short circuit).
• We recommend checking the charge level regularly, especially during the winter break. Recharging may be necessary.

Lithium Battery Safety Warning

1. It is forbidden to use and leave the battery near sources of heat and heat; e.g. fire, heaters, etc.
2. Do not use direct AC power for charging.
3. Short circuiting of the positive and negative battery terminals is strictly prohibited.
4. Do not throw the battery into a fire or heater.
5. No tapping or throwing, stepping on batteries etc.
6. lt is forbidden to solder the batteries directly and to pierce them with sharp objects.

Notes on the Use of Lithium Batteries

1. When the lithium battery is connected to the inverter, a spark may be generated at the moment of contact (caused by the capacitors inside the inverter needing to be charged first and thus generating a momentary high current). The size of the spark is related to the power rating of the inverter. This is a normal phenomenon and not a short circuit of the battery.
2. Do not connect a small capacity battery to a high power inverter as this will cause the battery to discharge at a high current. Exceeding the rated value can lead to battery damage or even safety accidents. The battery requires a voltage 1C current» inverter power, e.g. if the inverter is 1000W then the battery needs to be at least 12.8V 78AH.
3. Avoid instantaneous discharge current of lithium battery exceeding 3C, which may damage the lithium battery.
4. Lithium battery charging must use a special charger for lithium battery. Check that the charging voltage corresponds to the battery requirements. Charging current should preferably be 0.5C and below.
5. The lithium battery connection cable should be chosen correctly according to the current size. Do not use thin wires to connect high power loads, this can lead to serious safety accidents.
6. When connecting the wires to the lithium battery, crimp the appropriate terminals and choose according to the current size. Do not wrap the wires directly around the positive and negative bolts of the lithium battery.
7. When connecting the lithium battery to the wires, make sure that the positive and negative bolts of the lithium battery are torqued tightly. Otherwise, the bolts will generate a great deal of heat and cause the case as well as the wires to meit, leading to a safety accident.
8. A When connecting multiple lithium batteries in parallel, ensure that the number of parallel connections is less than or equal to 4 and that each battery has the same voltage and capacity. When connecting multiple lithium batteries in series, ensure that the number of series is less than or equal to the specified maximum number that can be connected in series, and that the voltage and capacity of each battery is the same.

Which Use Behaviour Can Damage Lithium Batteries

1.  Charging the battery below 0°C (32’F) will cause battery life to decay. 2. Discharging the battery below -20°C (-4°F) will cause battery life to deteriorate.
2. Battery use at ambient temperatures in excess of 55°C (131°F) can cause battery life to deteriorate.
3. Use in excess of the maximum continuous charge/discharge current of the battery may cause damage to the battery.
4. Using this battery as a car or motorbike starter battery can cause damage to the battery.
5. Charging the battery with more than the specified charging voltage may cause damage to the battery.
6. A short circuit between the positive and negative terminals of the battery may cause damage to the battery.
7. The battery is not used for a long time (more than half a year), at least 50% of the power to ensure. Otherwise, the battery may be over discharged, resulting in battery damage.

Charger Charging Instructions

To charge the battery, use a charger that supports LiFePO4 charging. Plug the charger into an AC outlet and set the battery to LiFePO4 mode.
Connect the positive and negative leads of the charger output to the positive and negative terminals of the battery to complete the correct connection. Take the ECO-WORTHY charger as an example, please scan the QR code in chapter 8 of this guide to view the instructional video for specific steps.

Lithium Battery Anomaly Treatment

1. Abnormal battery voltage: OV or < 8V Reason: When the battery is at a low voltage, the internal BMS will turn off the output and the test positive and negative terminal voltages will then be below 8V or OV. Solution: The lithium battery can be activated with the lithium battery charger or solar panel: connect the charger to the positive and negative terminals of the lithium battery or the solar panel to the positive and negative terminals of the lithium battery. Within a few minutes, the lithium battery will be back to normal voltage. If this method does not work, please contact our customer service via your direct purchase platform or our after-sales mailbox.

2. Insufficient battery capacity: battery capacity below-rated capacity Reason: Incorrect test method. lithium battery nominal capacity is the amount of capacity measured by charging to full charge at 0.5C current and discharging to empty at 0.5C current in a 25°C environment. Too low a temperature, too high a charge/discharge current and the accuracy of the measuring instrument will affect the test results. Solution: Test according to our standard test conditions. If the test capacity is still insufficient under standard test conditions, please contact our customer service promptly via your direct purchase platform or our after-sales email. Note for “0.5C”: For example, for a 100AH battery, the 0.5C current is 0.5*100=50 (Amps)

3. Battery will not charge. Reason: (1) Mismatch of chargers The charger voltage may not match the standard charging voltage of the battery, resulting in the battery not being charged; or the charger may not have an activation function. When the battery is in the BMS low voltage protection state, the output port is disconnected and the battery needs to be activated. If the charger does not have an activation function, the battery cannot be charged. (2) Solar controller without activation function When the battery is in the BMS low voltage protection state, the output port is disconnected. If the solar controller is not activated, it cannot detect the presence of the lithium battery and therefore cannot charge the lithium battery. Solution: Activate the lithium battery before charging, or replace the charger (or solar controller) with one that has the activation function. If this method still does not work, please contact our customer service promptly via your direct purchase platform or our after-sales email.

4. Battery cannot be discharged

5. Reason

6. The battery voltage is too low and the BMS low voltage protects it.

7. The battery temperature is too low or the battery temperature is too high and the BMS is protected by low or high temperature.

8. The discharge power is too large and the BMS discharge over-current is protected. Solution: Fill the battery and discharge it again, and make sure that the discharge conditions do not exceed the battery’s permissible range. If this method still does not work, please contact our customer service promptiy.

9. Battery cannot be charged to nominal maximum voltage. Reason:

10.  Incorrect charging voltage of the charger or incorrect selection of charging voltage and battery type of the solar controller

11. Temperature protection or charging over-current protection may have occurred during the charging process.

12. As the lithium battery is used for more cycles, the consistency between the cells inside the battery will change and the battery may not be charged to its maximum voltage. Solution: Choose the correct charger or set the charging voltage of the solar controller to a reasonable voltage. Make sure that the charging conditions do not exceed the range allowed by the battery. If this method does not work or if other questions exist, please contact our customer service promptly.

13. Battery cannot be discharged to the nominal minimum voltage. Reason:

14. The load device may have set a high cut-off discharge voltage, causing the battery to stop operating when discharged to that voltage.

15. Temperature protection or discharge over-current protection may occur during the discharge process.

16. As the lithium battery is used for more cycles, the consistency between the cells inside the battery will change and it may not be possible to discharge to the minimum voltage. Solution: Check that the cut-off voltage of the load device is reasonable; ensure that the discharge conditions do not exceed the battery’s permissible range. If the method does not work or if other questions exist, please contact our customer service promptly.

17. The battery is quickly filled and then quickly drained.
    Reason:

18. Excessive charging and discharging power, exceeding the rated current range of the battery

19. The battery has been cycled too many times and the battery capacity has decayed Solution: Ensure that the charge and discharge conditions do not exceed the battery’s allowable range; if the battery is at the end of its life, replace it with a new one. If these are not the reasons, please contact our customer service promptly.

20. Battery voltage exceeding the nominal maximum voltage
    Reason

21. In the solar system, when the battery is full, it may reach the protection voltage of the BMS and the BMS is in the off state. At this time, the voltage displayed by the controller is the voltage of the solar panel, which exceeds the normal voltage of the battery and is not the real voltage of the battery

22.  When several batteries are connected in series, one of the battery’s BMS is in a shutdown protection state, the voltage measured from the positive and negative terminals of the battery may exceed the normal voltage. This voltage is not the real voltage of the battery.
    Solution
    Disconnect the battery from the system or battery pack and test it separately. If the voltage still exceeds the standard maximum voltage, please contact our customer service promptly.

Considerations for Multiple Lithium Batteries Connected in Series and

Parallel

1. If multiple batteries are used in series in parallel, fully charge each battery first and check the voltage difference between each battery to ensure it is within 0.1V; then connect each battery string in parallel and check the battery voltage every 2 months.
2. Please read the instructions carefully before connecting in series and understand the maximum series voltage.
3. Once the series and parallel connections are completed, the total positive and negative wires for connecting the load, controller, inverter, etc. must be calculated to determine the current size of the entire battery pack.
4. Do not connect lithium batteries of different brands, capacities and cycles in series and parallel. Because the internal resistance and capacity of batteries of different brands, capacities and cycles vary greatly, which may cause battery failure.
5. Illustration of 12V batteries in series and parallel.

Selection of the wire diameter for the inter-cell connection

Table of Remaining Battery Capacity (SOC) vs. Voltage

Lithium Battery with Inverse Control, Inverter, Controller and Other Devices

When using a lithium battery with an inverter or controller, make sure that the positive and negative terminals of the battery pack are correctly connected to the battery terminals of the inverter or controller or to the DC terminal. Make sure that the AC input/output and PV input are correctly connected. Please refer to the instruction manual of the product you are using for the relevant equipment settings.

Take ECO-WORTHY inverse control, inverter and controller as an example, please scan the QR code on the right of this to see the instructional video.

 Long-term Storage Method without Lithium Battery

Lithium Battery Storage Method

1. Storage temperature: batteries should be stored at a temperature of 5°C to 40°C (39.5°F-104°F) with a relative humidity of ≤90%, the optimum storage temperature is 20°C to 30°C (68 F-86F). Batteries should be stored in a clean, dry, ventilated, 20°C to 30°C (68°F-86F) environment for extended periods of time.
2. Storage capacity: If the battery is to be left unused for a long period of time, remove it from the instrument and charge it to 50%-80% as well as recharge it every month for 1 hour. (As the lithium battery’s internal protection plate consumes a small amount of electricity, prolonged storage can permanently damage the battery and prevent it from being charged again)
3.  Storage prohibitions: Do not leave the battery in a 100% fully charged state for long periods of time. Do not leave the battery in a deficit state for long periods of time (below 5% power).

References

• SVB | Yacht- und Bootszubehör Onlineshop

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