How does the battery energy storage system used by the solar power system regular maintenance?

2022/04/08

  Author :Iflowpower – Portable Power Station Supplier

As different types of solar panels change the operation and maintenance of solar power systems, multiple types of batteries will also affect the performance and maintenance of solar energy + energy storage systems. If someone is looking for inexpensive and durable energy storage products, it may use lead-acid batteries, but this is some more maintenance work. For the owner of the solar power system for maintenance methods, the use of a lithium-ion battery energy storage system is a mainstream choice, but they do not apply to extreme environments.

Different levels of battery maintenance can affect which energy storage system adopted by solar energy + energy storage. The maintenance requirements for several common battery energy storage products used in the solar power industry: lithium-ion batteries, lead-acid batteries, nickel-cadmium batteries, and liquid flow batteries. (1) Brentharris, Founder and Chief Technology Officer of Lithium Ion Battery Eguanatechnologies, said that the lithium-ion battery has become the preferred energy storage product of most solar power applications due to its high density, low maintenance, low cost.

Lithium-ion batteries do not apply to some specific applications, such as extreme temperatures or occasions, while using other batteries that may be more cost effective. Lithium-ion battery maximum maintenance project is a degradation rate. Just like a mobile phone battery, the lithium ion battery used in the energy storage system of solar power facilities is seriously lost after a certain number of charging and discharging.

Developers must plan for this rate of degradation. Two most common lithium-ion battery types used in solar energy + energy storage projects are lithium iron phosphate (LFP) batteries and lithium nickel manganese cobalt (NMC) batteries. Sonnen Lithium Iron (LFP) Battery System (2) Lithium Iron (LFP) Battery Lithium Titanophosphate (LFP) Battery is a safe and durable battery.

Because of the use of cobalt elements, there is no thermal out-of control (fire) problem, and do not ventilate or cool measures, so it can be easily installed indoors, and it is very suitable for residential energy storage systems. According to the phosphate (LFP) Battery Manufacturer Sonnen, this battery is ideal for fixed energy storage applications, especially when the battery is used to cycle the solar power consumption optimization and grid service. What should normal operation? Lithium iron phosphate (LFP) battery does not need more maintenance, but its installation location may affect performance.

Battery management system (BMS) can be used to automatically monitor the temperature, charging state, cycle life of each battery to maximize performance. As long as the energy storage system is installed in an acceptable temperature range and height, no maintenance measures can be used. CARLOSRESTREPO, Vice President of Sonnen, said, "As long as the lithium iron phosphate (LFP) battery is stored and installed in the position where the product deployment environment is installed, do not regular maintenance.

However, keep the battery temperature away from extreme temperatures to ensure proper performance is important. Battery does not have to prepare for seasonal temperature changes. "CEO Bradhansen, EnSyncenergy, said:" Lithium iron phosphate (LFP) battery may encounter a threat of charging, high temperature, and even physical damage and pressure, so we must ensure safety.

When using a battery in a living space or nearby, the basic part of the system is selected as the system is an important guiding principle. "EGUANA's energy storage system adopts a lithium nickel-manganese cobalt oxide (NMC) battery (3) lithium nickel manganese cobalt oxide (NMC) battery lithium nickel manganese cobalt oxide (NMC) battery as long as the battery management system is monitored, can also last for a long time Durable and very safe. This battery can store more electrical energy than other types of lithium ion batteries by adding elements such as nickel and manganese in battery chemical components.

What maintenance does it work normally? With other lithium-ion batteries, lithium nickel manganese cobalt oxide (NMC) batteries do not need important maintenance. Battery Management System (BMS) will monitor the voltage, current and temperature of the battery to ensure safety and work life. Eguana's Harris said that "extreme operations will shorten the battery life, and the monitoring system will run through the battery management system (BMS) records to notify the warranty.

Battery Management System (BMS) shutdown system under any operating conditions that may not safely. "The company's battery energy storage system uses LGChem, lithium nickel manganese cobalt oxide (NMC) batteries produced by LGChem. As long as the safety temperature range is confirmed, the lithium nickel manganese cobalt oxide (NMC) battery can be used in winter.

"If you want seasonal energy storage systems, they should be stored in the room," Harris said, and quoted Canada's winter as extreme examples. PRIMUSPOWER's ZnBr mixed liquid flow battery energy storage system (4) Liquid current battery - especially bromide (ZnBR) battery bromide (Znbr) liquid flow battery (most common by PrimusPower) is very suitable for large-scale Long time energy storage system. The liquid flow battery is supplied with two chemical components dissolved in the liquid separated by the diaphragm.

Bromide zinc bromide (ZnBr) liquid flow battery has a bromide salt dissolved in an electrolyte. The battery technology used by PrimusPower is slightly different from traditional bromide (Znbr) liquid flow cells, and its diaphragm is not cleaned or replaced. PrimusPower uses storage tanks to store electrolyte, its liquid flow battery has an infinite charge and discharge cycle without performance degradation.

Liquid flow battery generally has little maintenance requirements. What maintenance does it work normally? The liquid flow battery is the same as the fuel powered lithium battery, so they are only equipped with an electronic device and an electrolytic cell. Primus said that its EnergyPods products only have to conduct annual maintenance access by certified operations and maintenance (O & M) service technicians to perform routine checking, replace air filters, filled with electrolytes.

The flow battery can be used in winter, and can be installed under very cold conditions. "We monitor all deployed batteries all day to ensure proper operation and actively resolve any potential on-site issues. These data can also be supplied to the owners in real time.

"PrimusPower Ccojorgheinemann said," Our battery design life is the same length of service life of solar power facilities using the energy storage solution, and even longer is longer, and do not add or regularly replace it like a lithium-ion battery. "Trojanbattery gel lead-acid battery (5) lead-acid battery is well known, lead-acid battery is reliable and low price. Their grid structure is immersed in acidic electrolyte, and its electrolyte may be supplemented for a long time.

Since the cause of the material is heavier, some must be installed in a ventilated area. At this point their operations and maintenance requirements have been well understood, so they are ideal for most solar + energy storage applications, and should be stored in a moderate dry place. What maintenance does it work normally? The terminal connection of the lead-acid battery should be checked several times a year to ensure that they do not loosen over time.

The rich liquid-rich lead-acid battery should be replenished regularly. The glass fiber separator (AGM) battery and the gel lead acid battery are sealed, so do not replenish the electrolyte. If the lead-acid battery is temporarily not used, it should be properly saved.

Trojanbattery said that the lead-acid battery will discharge itself over time, even if it is not connected to the load, it is also charged to the lowest level. This self-discharge ratio changes with temperature, high temperature will add discharge rate, while low temperatures reduce discharge rate. TrojanBattery experts said that "the maintenance required for lead-acid batteries is not very difficult, but the maintenance work is large.

This is especially true for lead-acid batteries to be added to water, when the distilled water is added to supplement the electrolyte level, the acid liquid will be exposed to the outside. We recommend battery maintenance staff to wear safety glasses and gloves. If the customer can request external personnel to help to complete this task in battery maintenance.

"Enersys' nickel-cadmium batteries (6) nickel cadmium (NICD) battery nickel-based battery is ideal for remote access to the network installation, suitable for demanding applications requiring reliable backup power and cannot regularly maintenance. They work well in extreme temperatures and depth discharge. What maintenance does it work normally? Enersys said that it is similar to lead-acid battery maintenance and similar, and should be regularly inspected and supplemented with electrolyte nickel-cadmium (NICD) batteries.

Since the nickel cadmium (NICD) battery can work within a wide operating temperature range, it is not necessary to prepare for extreme cold in winter, but the space stored in the battery should not be below -22 ¡ã F. As long as the environment is dry and within the appropriate temperature range, the nickel-cadmium (NICD) battery can be stored (not connected to the load) for 12 months. Enersys Alternate Power Business Development and Marketing Director Jayfrankhouser.

"Battery system owner can easily perform voltage readings and electrolyte liquid level inspection of nickel-cadmium batteries. Adding water can be done by the owner, but they have to take safety precautions outlined in the installation and operation manual. Capacity test or other electronic testing should be completed by qualified technicians.

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