The OPZV battery is also known as a tubular colloid, and the self-discharge is low. It is made of high-quality material. The monthly discharge rate is ≤1.5%, using colloidal electrolyte, high heat capacity, good heat resistance, suitable for harsh environments (40 ~ 60) ° C), cycle performance and deep discharge recovery ability, no need for hydrating maintenance, gas composite efficiency is higher than 95%, long service life, floating design life 15-20 years, normal floating charge, capacity is stable, low attenuation rate The sealing performance is excellent, no gas penetration, no pollution environment, the environmentally friendly product is excellent in safety, the special partition, high porosity, low resistance, low internal resistance copper pole column, battery is the most important One of the equipment, cost accounting for about 80% of the system, the technical parameters of the battery are very important to the system design. The following uses a lead charcoal lead-acid battery as an example to explain the key parameters of the battery such as capacity, discharge depth, and number of cycles, and the like. At the time of the battery and inverter selection design, pay attention to the maximum charge and discharge current of the battery.OPZV Colloidal Battery Features:
1. Electrolyte: Made of German gas-phase silica, the electrolyte is gel state in the finished battery, does not flow, so the no-leakage and electrolyte layers.
2. Polar panel: The positive electrode plate uses a tubular plate, which can effectively prevent living substances from falling off. The positive plate skeleton is cast by multi-alloy, and the corrosion resistance is good, long service life is long. The negative plate is a plaster plate, a special grid structure design, improves the utilization rate of living materials and the large current discharge capability, and the charging acceptance ability is strong.
3. Battery shell: ABS material, corrosion resistance, high strength, beautiful appearance, and high-free leakage risk with high levels of reliability.
4. Safety valve: Special safety valve structure, suitable opening and closing valve pressure, reduce the loss of water, avoiding battery housing expansion, rupture, and electrolyte dryness.
5. Sworse: Adding special microporous PVC-SiO2 partition with European Amer-SIL, with a large surface of the diaphragm and low resistance.
6. Terminal: The inline copper lead base column has a greater current load carrying capacity and corrosion resistance.
OPZV battery application field
Telecom, wireless, microwave relay station, emergency system, power station, nuclear power plant, alternating power station, solar energy, wind energy, large UPS, train signal, navigation and air supply (board or shore), process and control factory, spare voltage supply, buoy lighting.
Lead-acid battery key technical parameters
1, battery capacity
The capacity of the battery is determined by the number of active substances in the battery, usually represented by MAH when AH or mAh is used. For example, a nominal capacity of 250ah (10Hr, 1.80V / monomer, 25 ° C) refers to at 25 ° C, and is discharged from a current of 25a at 25 ° C to reduce the capacity of a single battery voltage to 1.80 V.
2, rated voltage
The potential alias between the positive and negative poles of the battery is called the rated voltage of the battery. Common lead-acid batteries are three types of 2V, 6V, 12V, and the lead-acid battery of the monomer is 2V, 12V battery is formed by a battery of 6 monomers.
The actual voltage of the battery is not a constant value. The voltage is high when the air is loaded. When the load is loaded, the voltage will be reduced, and the voltage will suddenly fall, the battery voltage and the remaining electricity are approximately linear relationship. This simple correlation is only present in the case of no load. When a load is applied, the battery voltage will result in distortion due to the pressure drop caused by the internal impedance of the battery.
Below is a reference value of the battery's battery voltage and the remaining power, assuming that the voltage at the time of the battery full charge is 12.8V, it can be seen that the rated power is 12V, when the voltage is 12V, the remaining power is about 50%; When the voltage is lower than 12V, the remaining power will fall sharply.
3, maximum charge and discharge current
The battery is two-way, two states, charging, and discharge, which are limited, different batteries, and the maximum charge and discharge current is different. Battery charging current is generally represented by the multiple of battery capacity C, for example, if the battery capacity C = 100ah, the charging current is 0.15c, it is 0.15 × 100 = 15A. The maximum charge current of the colloidal lead-acid battery is about 0.15c. The charging current has a conference affecting the battery life. The lead charcoal battery adds activated carbon in the negative electrode, which greatly increases charging performance, such as 0.25C10 parameters, indicated in 10 hours. The maximum charging current is 0.25 * 250 = 62.5A. The maximum discharge current 30i10 of the lead carbon battery in the table, wherein 10i10 = C10 is indicated in 10 hours, and the maximum discharge current is 30 * 25 = 750a. Colloidal lead-acid battery discharge current is generally about 3i10.
The battery charge current and system have a big relationship. If the design is not well designed, it will affect the performance of the system, the charging current, and component power. For example, the component is 5KW, the battery pack voltage is 48V, then the battery maximum charge current is about 100A. If the maximum current is a common lead-acid battery, the battery capacity is at least 1000ah; if the maximum current is 0.25C lead carbon storage battery, the battery capacity is at least 400 AH.
The discharge current and load power are related, such as a system, the load is 10KW, the battery pack voltage is 48V, then the maximum discharge current of the battery pack is 200A, and the 30i10 lead carbon battery is more than 80ah, the colloid lead-acid battery is 800ah.
4, discharge depth and cycle life
During the battery use, the capacity of the battery is present in the percentage of its rated capacity is referred to as discharge depth. The high and low of the discharge depth is deeply related to the battery life. The deeper the discharge depth, the shorter the charging life.
The battery experiences charge and discharge, called a cycle (one cycle). Under a certain discharge condition, the battery can withstand the number of cycles that the battery can withstand before the battery works to a certain capacity specified value, called a cycle life.
The number of cycles of various batteries is different, and the traditional fixed lead-acid battery is about 500 ~ 500 times; the start-type lead-acid battery is about 300 ~ 500; the valve-controlled sealed lead-acid battery cycle life is 1000 ~ 1200 times.
The battery discharge depth of 10% to 30% is shallow circulation discharge; the discharge depth is 40% to 70% to moderate circulation discharge; the discharge depth is from 80% to 90% to deep cycle discharge. The deeper the daily discharge depth of the battery for long-term operation, the shorter the battery life; the more shallow the discharge depth, the longer the battery life.
In the figure, a lead-carbon battery is a lead-carbon battery. When the discharge depth is 50%, the cycle life is 4,880 times, and the life is more than 12 years. When the discharge depth is 70%, the cycle life is 3,760 times, the life is more than 10 years; the discharge depth is 100% At the time, the loop life is 998 times, the life is less than 3 years; shallow circulation discharge is conducive to extending battery life. Battery shallow circulation, there are two obvious advantages: First, the battery generally has a longer cycle life; second, the battery often maintains more spare safety capacity, so that the power supply rate of the photovoltaic system is higher. According to the actual operation experience, the relatively moderate discharge depth is 60% to 70%.
5, the energy of the battery
The energy of the battery refers to the electrical energy given by the battery in a certain discharge system, usually expressed as a wattage (WH). The energy of the battery is divided into theoretical energy and actual energy. Such as a battery of 12V250AH, the theoretical energy is 12 * 250 = 3000Wh, that is, 3 degrees, indicating that the battery can be saved; if the discharge depth is 70%, the actual energy is 3000 * 70% = 2100 WH, that is, 2.1 degrees Electric, this is the amount of power available.
The energy of the battery is also related to temperature, the lower the temperature, the lower the activity of the battery, the lower the capacity. If the capacity is 60%, the capacity is 82% in zero, and the capacity is 106% when 40 degrees.
Battery capacity calculation formula
A photovoltaic off-network project, the component is 3.6kW, the system voltage is 48V, the load is 4KW, the load peak power is 5KW, the maximum amount of power is 8 degrees, the average power is 6 degrees, and the life requires 6 years. First calculate the maximum charging current 3600/48 = 75A, then calculate the maximum discharge current 5000/48 = 104a, using a lead charging battery, the charging current is 0.25c10, the lowest capacity is 300ah, the discharge current is 35ah, the lowest capacity is 35ah, the life requirements More than 6 years, the discharge depth is 70%, 6000 / (48 * 0.7) = 178ah, according to the specifications of the 12V200AH battery 4. The total capacity is 9.6 degrees, and occasionally discharges 8 degrees, and the average discharge depth is 62.5%. Recommend: LiFePO4 Battery Manufacturer Energy storage battery Manufacturer Integrated machine energy storage battery series Manufacturer Lead lithium battery Manufacturer Outdoor Backup Battery Manufacturer Portable outdoor power supply Manufacturer Power battery Manufacturer Powerwall LiFePO4 Battery Manufacturer Battery rack Manufacturers Telecom LiFePO4 Battery Manufacturer Wall mounted battery storage Manufacturer China Lifepo4 Battery
