Thursday, 13 October 2016

Home Batteries Can Save More Money

Houses with solar that don’t also have energy storage like solar power batteries have no way to use the excess electricity generated during the day when the sun is shining and solar energy is in abundance. When households have solar energy they can’t use, it goes back into the power grid. Often, power companies pay households for giving back the extra power generated by solar, but not as much as they charge for the same amount of electricity later in the day, when people actually need it. Without a home battery, solar customers end up paying extra for the electricity they generated themselves, which is like paying the power company to store the energy for them so they can use it later. Instead of giving more money to the power companies, why not just store it yourself? With a home battery, solar households have this opportunity.

This eases the workload of power plants, decreases carbon emissions, and saves money for households with solar power storage at the same time. Taking this into consideration, it’s hard to argue against Musk when he says that all solar panel owners need a home battery. Without a home battery to store excess electricity, solar owners continue to throw money and energy at the power companies. Home batteries keep electricity and money in the hands of the consumer.

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No longer blew! Prevent Lithium Battery Explosion Method!

( 48V) Lithium batteries are flammable devices, mobile phones, scooters and other built-in lithium device, if used improperly, there is always the time of explosion. We have reproduced in movie, show scooter lithium blast.

Do lithium produced in the manufacturing process itself is also a problem can not be ignored, because the manufacturing process was defective, it is easy to leave fragments of metal dust, copper and aluminum foil between the positive and negative should be insulated from these scrap battery overheated, will be like the dumplings in boiling water to do the same random thermal motion in the electrolyte, if prolonged exercise, these particles happen to be close to the lifepo4 battery positive and negative poles in the middle of the diaphragm can easily cause a short circuit inside, and inside the battery the electrolyte is a flammable liquid, a spark caused by a short circuit in a confined environment can easily lead to electrolyte battery ignition internal combustion and explosion. Is there a lithium battery to prevent prevent blew? American universities have studied the new technology successfully. 

Stanford University scientists have developed a new lithium battery, and claim to have mechanism to prevent the explosion. Traditional lithium-ion batteries will be between the electrodes with liquid or gel electrolyte containing ions, these electrolytes because of a short circuit, overcharge and other factors continue to generate heat, once the temperature is too high, for example, more than 150 degrees, the electrolyte will fire and explosion, and this prevents blew lithium battery prevents this from happening, the principle is automatically powered off before the battery overheating, so that the battery is no longer a chemical action ordered temperature decreases, when the temperature is reduced to a certain level when the battery quickly restart. This batteries can be used in solar powered portable generator.

However, they are not flame retardants and the like so that the battery can not use the material, but turned to nanotechnology, nanoscale nickel particle surface plus a layer of graphene, and embedded in a flexible polyethylene film, and the film will connect the two poles . The film will be stretched when heated, separated from the conductive nickel particles, will cause power outages effect, then the film cools, it will reconnect the power supply of the nickel particles.

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Six Ways for Solar Energy Storage Battery Freeze in Winter

In winter, the solar power batteries should take the following conservation measures:

Greenhouse overhead storage batteries when not in the house to save more than 0 ℃, should not be placed directly on the ground. Before storing the first external battery clean, add enough liquid electrolyte, adequate electricity, tighten the plug. After a supplementary charge every month, once every two weeks to check the electrolyte level, and refresh immediately insufficient. Thus, the battery can ensure safe winter.

Progress liquid volume ratio of water and sulfuric acid electrolyte composition, the higher the content of sulfuric acid in the electrolyte, the electrolyte specific gravity higher, the lower the freezing temperature of the electrolyte. To this end, the country may be to select the appropriate proportion of the electrolyte according to the local winter minimum temperature, to prevent the electrolyte from freezing.

Enough electricity to keep the state during the winter, when the battery discharge 50%, the risk of electrolyte freezing there. For this reason, the battery discharge level winter does not allow more than 50%. In winter, we should always check the LEP battery save electricity, the shortage should be promptly added.

Progress temperature electrolysis temperature of the electrolyte significant impact on the capacity of the battery, the ambient temperature decrease 1 ℃, the capacity reduction of about 1% - 2%. To this end, the temperature of the electrolyte to progress, should be the locomotive parked indoors, or move into the battery room above 0 ℃.

Water was added to distilled water mixing battery should be uniformly mixed with the electrolyte. If no time mixing well, floating on top of the electrolyte distilled water freezes. To do this winter to add distilled water to the battery, immediately to its charge, while charging or distilled water, electrolyte can quickly mix and distilled water will not freeze up. The battery usually be used in solar powered portable generator.

Check regularly start the start the system should be checked regularly maintained. Adjustable voltage regulator, the charging voltage is increased to 0.60V. Every time you start not exceed 3 - 5 seconds, the time you start none, should stop 1 minute before start. Long consecutive starts, it will damage the starter motor and battery. 

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Battery Lose Effectiveness Modes

Battery Lose Effectiveness Modes

Since the plate type, production conditions, there are differences in usage, and ultimately lead to the battery '> reasons for battery failure is also different, back satisfied them, there are several Lose Effectiveness modes: 

1.Corrosion deformation of the positive electrode plate board gate

Alloy currently used on the production of three types of traditional lead-antimony alloy, antimony or ultra-low antimony alloy, lead-calcium. The three cast alloy grid, the battery charging process will be oxidized to lead sulfate and lead dioxide, leading to the loss of the role of supporting the active material of the battery failure; after corrosion due to the formation of lead dioxide layer, of lead alloy to produce stress, the linear grid grow up deformed, and finally the destruction of the whole plate, the active material and grid off poor contact or short circuit at the bus. And these batteries can be used in solar powered portable generator.

2.The positive electrode active material shedding, softening

In addition to grid grow active material loss caused by the outside, with repeated charging and discharging, a combination of lead dioxide between the particles are slack, soften, falling off from the plates. Plate manufacturing, assembly and elastic charge-discharge range of factors, all of the positive electrode active material softening, shedding affected. 

3.Irreversible sulfation

Battery discharge, discharge after long-term storage or storage in a discharged state, the plate will dissolve lead sulfate, recrystallization born under one kind of thick, hard to accept the charging of lead sulfate crystals, this phenomenon becomes irreversible sulfation . Severe electrode degradation, can not be charged, such as solar power battery discharge.

4.Premature loss of capacity

When used as a low-antimony or lead-calcium alloy grid, the battery used in the early stages (about 20 cycles), the emergence of the phenomenon of sudden drop in the capacity of the battery failure. 

5.Antimony serious accumulation on the active substance

Antimony positive electrode plate with the charging and discharging cycle, is oxidized to ionic moiety, with the electrolyte to reach the anode active material reduction due to hydrogen ion electrolyte antimony easier than hydrogen reduction born on lead, antimony therefore after accumulation, when most of the current battery charge are used for water decomposition, the battery is not charging properly and failure.

6.Thermal runaway

Since the charging voltage is too high, the current is too large, causing the battery temperature, battery ultimate deformation, cracking and failure, the same as lifepo4 battery pack.
7.Negative strap corrosion

Under normal circumstances, there is no bus low corrosion problems, but in the valve-sealed batteries, when creating oxygen cycle, the battery upper space filled with basic oxygen, electrolyte separator may also climb along the tabs on the bus, bus alloy will be oxidized naturally lead sulfate, if the bus electrode alloy inappropriate choice of impurities and crevice corrosion along these cracks will deepen, causing the lug and bus disengaged negative plate failure.

8.Membrane perforation caused by a short circuit

Individual species diaphragm aperture greater use may cause a big hole, the active materials can pass through the large hole in the charge and discharge process, resulting in micro-short circuit, the battery failure.

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Wednesday, 12 October 2016

Why Lithium Polymer Battery So Popular

The lithium-ion battery electrolyte material different from the lithium-ion battery is divided into liquid lithium-ion battery (Liquified Lithium-Ion Battery, referred to as LIB) and lithium-ion polymer battery (Polymer Lithium-Ion Battery, referred to as the PLB) with lithium or plastic ion battery (Plastic Lithium ion batteries, referred to as the PLB). Anode and cathode materials used in lithium-ion polymer battery with liquid lithium-ion is the same, divided into cathode material of lithium cobalt oxide, lithium manganese oxide, LifePo4 batteries ternary materials and materials, graphite is extremely negative, the battery works basically consistent. The main difference lies in the different electrolytes, liquid lithium-ion battery using a liquid electrolyte, lithium-ion polymer battery Zeyi solid polymer electrolyte to replace, such polymers can be "dry state", it can be "colloidal" currently most using a polymer gel electrolyte.


Solid: The solid polymer electrolyte lithium ion batteries and polymer electrolyte is a mixture of salts, such cells at high room temperature ionic conductivity, can be used at room temperature and used in portable solar power generator.

Gel: gel polymer electrolyte lithium ion batteries i.e., plasticizers and other additives added to the solid polymer electrolyte, thereby improving ionic conductivity, so that the battery can be used at room temperature.

Polymer: As the solid electrolyte instead of a liquid electrolyte, as compared with liquid lithium-ion batteries, polymer lithium ion battery having a thin shape, and of any area of any shape, etc., so you can use plastic composite film manufacturing batteries housing, which can improve the ratio of the entire battery capacity; polymer lithium-ion polymer battery can be also used as a cathode material, its quality will be improved by more than 20 percent more energy than the current liquid lithium-ion battery. Lithium-ion polymer (Polymer Lithium-Ion Battery) battery has a small, thin, lightweight characteristics. Thus, the polymer battery market share will gradually increase.

Polymer lithium ion battery has the following characteristics:
Shaping flexibility;
Higher quality than the energy (3 times the MH-Ni batteries);
The electrochemical stability window wide, up to 5V;
Perfect safety and reliability;
Longer cycle life, less capacity loss;
Volume utilization is high;

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Tuesday, 11 October 2016

What is Solar Energy Generation System

Solar power generation system, also known as solar energy storage system, solar energy is converted to electrical energy through the solar charge controller to power the load, while to the battery pack.


Solar power generation systems, also known as solar power systems, solar energy is converted to electrical energy through the solar charge controller to power the load, while giving the lifepo4 battery pack; in the absence of sunlight through the solar charge controller from the battery to the DC load power supply, but also the battery directly to the individual inverter power supply, through a separate inverter is inverted into AC power to the AC load.

System Principle

Sun light in the semiconductor p-n junction, forming a new hole - electron pairs, under the action of p-n junction of the electric field, holes from the n region to the p region, electrons from the p region to the n region, after turning the circuit form a current. This is the photovoltaic solar cell works.

solar power generator solar power in two ways, one is light - heat - electricity conversion mode, the other is light - electric direct conversion method.

(1) light - heat - electricity conversion mode through the use of thermal power generated by solar radiation, usually from the solar collectors to heat absorbed by the working fluid is converted into steam, and then drive steam turbine power generation. Before a process is light - thermal conversion process; after a process is heat - electricity conversion process.

(2) light - electric direct conversion approach is the use of the photoelectric effect, the direct conversion of solar radiation into electrical energy, light - the basic electrical conversion device is a solar cell. Since the solar cell is a photovoltaic effect and solar energy directly into electrical energy device, a semiconductor photodiode, when the sun light to the photodiode, the photodiode will be the sun's light energy into electrical energy generated current. When the number of batteries connected in series or parallel can become a relatively large output power of the PV array.

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Difference LifePo4 Battery and Ternary Battery

Lithium battery electric car is one of the most common types of batteries, although its inception in 1970, the time is not long, but with a high energy density, long cycle life and other characteristics quickly occupied the vast majority of electric vehicle battery market part of country. Today, in the sale of electric vehicles with lithium batteries mainly have two kinds of LifePo4 batteries and ternary lithium. So ternary LifePo4 battery which different but it?

Battery power is the core of electric vehicles, pure electric vehicles are the only source of driving energy is directly related to the power performance, battery life of electric vehicles, but also directly related to the safety of electric vehicles. The cost of new energy vehicles constituted, the battery-powered systems accounted for 30-50% of the cost of new energy vehicles. And since the birth of electric vehicles, battery technology has restricted the practical process of electric vehicles. Increase power density, energy density, life and cost reduction has been the core of electric vehicle battery technology research and development.

Lithium battery electric car is one of the most common types of batteries, although its inception in 1970, the time is not long, but with a high energy density, long cycle life and other characteristics quickly occupied the vast majority of electric vehicle battery market part of country. Today, in the sale of electric vehicles with lithium batteries mainly have two kinds of LifePo4 and lithium three yuan. At the same time, it also can be used in solar powered portable generator.

What is the difference ternary LifePo4 batteries have it?

Outline Package

Lithium-ion batteries can be divided into a square battery, soft pack batteries and cylindrical batteries.

Material system

The current mainstream of LifePo4 battery, battery ternary materials, respectively, are defined by LifePo4 and ternary materials as cathode materials for lithium ion batteries. Ternary material refers Ni, Co, Mn or Ni, Co, Al three metal elements as the core element of the cathode material.


LifePo4 monomer, the energy density of 120Wh / kg, after the group was 80Wh / kg; ternary lithium monomer, the energy density of 180Wh / kg, after a set of energy density 110Wh / kg. From the data point of view, in terms of energy density, three better than the LifePo4 battery; in cycle life, the two equivalent single cell cycle life of greater than 3000 times the battery group, due to the use of working condition becomes severe and complicated, there will be some reduction in life expectancy, the battery life of six years, equivalent to 150,000 kilometers. EV200 battery used ternary lithium battery.

Currently the energy density of LifePo4 has basically reached the ultimate theory, the energy density of the battery as well as three yuan a lot of room for improvement. Comprehensive capacity density, power density, cycle life, low temperature performance, etc., the overall performance is better than ternary battery LifePo4 batteries.

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