The Pacific Automotive Network lithium iron phosphate battery can recover from over-discharge. When the battery is discharged, the lithium ions are deintercalated from the graphite crystal, enter the electrolyte, then pass through the separator and migrate to the lithium iron phosphate. through the electrolyte. The crystal surface is then reintegrated into the lithium iron phosphate lattice.
To know if the lithium iron phosphate battery is overcharged or overdischarged, you need to understand its charge and discharge calculation method.
Calculation method for charging and discharging a lithium iron phosphate battery Charging: The charging process is a process of filling a bucket with water, and this process takes time time. The larger the faucet, the faster it will fill with water. Likewise, battery charging depends on charging current. The higher the current, the longer the charging time.st short!
The charging current is 20A, which means the full charging time is 5 hours; divide the battery capacity by the current to get the charging time.
Discharge assumption: The power at the load end is 500 W, i.e.: 500 W (power at the load end)/48 V (nominal voltage) = 10.42 A (current) 100 Ah (battery capacity) / 10.42 A. (current) = 9.6 hours (working hours), overcharge and over-discharge are all operating behaviors that exceed the capacity of origin. Overcharging and overdischarging can damage lithium iron phosphate batteries, causing irreversible damage to the battery.
Overcharging will cause lithium dendrites, and overdischarging will cause copper dendrites, leading to problems such as short circuit and malfunction of lithium batteries; therefore, batterieslithium require superficial charging and discharging. At present, when using lithium batteries, protection circuits should be installed as much as possible to ensure safety. At the same time, lithium iron phosphate battery is a relatively safe type of lithium battery.
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How much does it cost to discharge a 60 volt lithium battery and 40 amps?
The formula is capacity/current = time For example, the capacity is 100AH and the current is 50A, then the discharge time = 100/50 = 2 hours< /p>< p>1. Battery Discharge Time Setting Tips:
Battery discharge time is mainly affected by load size, battery capacity, ambient temperature, cut-off voltage of battery discharge and other factors. Generally,To calculate the UPS battery power time, the battery discharge current can be calculated, and then the discharge time can be found according to the battery discharge curve.
Battery power duration is mainly affected by load size, battery capacity, ambient temperature, battery discharge cut-off voltage and other factors. Generally, to calculate the UPS battery power time, the battery discharge current can be calculated, and then the discharge time can be found according to the battery discharge curve. The battery discharge current can be calculated according to the following empirical formula: discharge current = inverter capacity (VA) × power factor/average battery discharge voltage × efficiency. If you want to calculate the actual load discharge time, just substitute the inverter capacityby. the actual load capacity.
2. Battery Discharge Time Standard:
Battery refers to a cup, tank or other container or part of a composite container that contains an electrolyte solution and metal electrodes to generate battery fluent. As technology advances, a battery generally refers to a small device capable of generating electrical energy. Like solar cells. Battery performance parameters mainly include electromotive force, capacity, specific energy and resistance.
The performance parameters of the battery mainly include electromotive force, capacity, specific energy and resistance. The electromotive force is equal to the work done by the non-electrostatic force (chemical force) of the battery when a positive unit charge moves from the negative electrode to the positive electrode throughrs inside the battery. The electromotive force depends on the chemistry of the electrode material and has nothing to do with the size of the battery. The total amount of charge a battery can produce is the battery capacity, usually measured in amp hours. In a battery reaction, the electrical energy produced by 1 kilogram of reaction material is called the theoretical specific energy of the battery. The actual specific energy of the battery is lower than the theoretical specific energy. Since not all reactants in the battery react according to the reaction of the battery, and the internal resistance of the battery also causes the electromotive force to drop, batteries with high specific energy are often called high energy batteries . The larger the surface area of the battery, the lower its internal resistance.
Battery energy storage is limited. The total quantityof charge that the battery can produce is called its capacity, which is usually measured in amp-hours. Battery capacity is related to the amount of electrode material, i.e. the volume of the electrode.
Practical chemical batteries can be divided into two basic types: primary batteries and accumulators. The original battery may produce power once manufactured, but it is discarded once discharged. The battery is also called secondary battery. It must be charged before use. After being charged, it can be unloaded and used. After being discharged, it can be recharged. When the battery is charged, electrical energy is converted into chemical energy; when discharged, chemical energy is converted into electrical energy.
What is the charging and discharging principle of lithium batteries?
Single cell (battery):
Power battery : Normal discharge current is 2C, maximum discharge current is 15C to 20C, discharge environment is 15 to 45 degrees Celsius, maximum charging current is generally 1C and voltage discharge is 4.2V~3.0V (mainly used in electric vehicles, electric saws and other equipment).
Multi-series and multi-parallel batteries:
Single power type cells are generally used, and the discharge current generally needs to be divided according to the battery capacity :< /p>
1. Batteries below 30Ah: maximum discharge current 4C, normal discharge 1.5C~2C, working environment 15~45 degrees Celsius, variable voltage;
2. : maximum discharge current 2C, normal The discharge is 1.5C ~ 2C, the working environment is 15 ~ 45 degrees Celsius, and the voltage is variable.
C refers to the rated capacity of the battery, such as 800 mAh, andvs. A discharge with rated capacity current is called 1C (800 mA, 2A) and a discharge with twice the current is called 2C (1.6A, 4A).
What are the formulas and units for calculating power?
Lithium batteries replace lithium metal batteries that have appeared in recent years. Its anode is adopted. an energy-absorbing carbon electrode that stores lithium ions. When charging, the lithium atoms in the cathode are ionized into lithium ions and electrons, and the lithium ions move to the anode and combine with the electrons to form a lithium atom. During discharge, lithium atoms are ionized from the anode surface in the graphite crystal into lithium ions and electrons, and lithium atoms are synthesized at the cathode.
Detailed information:
Operating principlet
Lithium metal battery:
Lithium metal battery generally uses manganese dioxide as the cathode material, and metal batteries use lithium or its metal alloy as the cathode material. negative electrode and using non-aqueous electrolyte solutions.
Discharge reaction: Li+MnO2=LiMnO2
Lithium-ion battery:
Lithium-ion batteries generally use metal oxide alloy lithium as cathode material and graphite. as cathode material. Negative electrode materials, batteries using non-aqueous electrolytes.
The reaction that occurs on the positive charge electrode is
LiCoO2==Li(1-x)CoO2+XLi++Xe-(electrons)
On the negative charge electrode The reaction that occurs is
6C+XLi++Xe-?= LixC6
The total reaction of the rechargeable battery: LiCoO2+ 6C = Li( 1-x)CoO2+LixC6
Baidu Encyclopedia - Lithium Battery
Lhe best way to calculate how much a lithium battery will discharge when it goes from 36V to 31.5V is to use a formula.
Calculation method: Capacity C = discharged battery (constant current) I × discharge time (hours) T.
Reverse: Time discharge T = Capacity C/Discharge current (constant current) I.
For example, if a battery is discharged with a constant current of 500MA (milliamps) for 2 hours, then the capacity of the battery is equal to 500MA*2H=1000MAH=1AH. Another example is if a. the battery is discharged with a current of 5A for 2 hours, then the battery capacity is 10AH.
Charge a battery with constant current and voltage, then discharge it at constant current. The amount of electricity released corresponds to the capacity of the battery, storage battery, nickel-metal hydride battery, etc., but. Lithium batteries cannot fdo that. They have a minimum discharge voltage, that is, the discharge voltage cannot be lower than 2.75V, generally 3.0V is the lower limit protection voltage.
For example, if the capacity of a lithium battery is 1000 mAh, the charge and discharge current will be 1000 mA. If the maximum battery voltage is 4.2 V and it is placed at 3.0 V, the capacity released. will be the true capacity of the battery.
I don't know what power unit you need. These are usually the milliamp hours listed on the battery. The approximate formula for calculating discharge is discharge time * discharge current. you want to use energy as a unit, i.e. (36+31.5)/2*discharge current*discharge time. I don't know how many cells the battery you mentioned has, so it must be Voltage calculation is not easy to calculatecapacity in milliamps