The island is surrounded by a beautiful blue sea. The island has green fields and golden beaches. There are small rivers and streams. Many birds sing on the trees...
There are windmills and a coal mine that welcome visitors to the island for sightseeing. There are many and many train routes on the island...
- Who just passed this track?
- It's Thomas!
Hi, everybody! (Thomas greeted the little friends)
This is the manager of the train, the fat manager, and it is a daunting task for the Fat Manager to hand over the Thomas train.
The fat manager said: Thomas, here are the seven types of batteries No. 7 delivered to me by Count Tommar. Let's find out the performance differences of these seven types of batteries. I have given you this glorious task!
Guarantee to complete the task! (Thomas answered without hesitation)
(All are AAA-7).
Swan carbon battery. (White Swan Battery Co., Ltd. produced, supermarkets did not sell white elephants, so bought this swan, almost in the impression)
Toshiba carbon battery. (hours this battery to 1 yuan -1.5 yuan section, more commonly used)
Duracell alkaline battery. (It was a luxury to use this battery when I was young. In the early 1990s, this battery was sold for $7-8.)
Nanfu alkaline battery. (Feeling later because of the regular advertising on TV, the performance is still good, so it has been the main battery)
Double deer alkaline batteries. (It is also an old brand. There are no advertisements in Nanfu. It occupied a lot of counters in the supermarket I went to)
Ray photographed a Ni-MH rechargeable battery at 950 mAh. (Buy in Jingdong, high cost, can not afford to buy "love wife" to buy this is not bad)
Lithium-iron battery. (Gaofu handsome battery, lithium iron one time, relatively rare, Taobao purchase)
Look at the battery's positive pole:
Of course there are negative electrodes:
The basic parameters of these 7 kinds of batteries have been summarized into a table (the No.7 battery resistance is just blocked by the worthy watermark, which is 5 yuan/section):
Faced with so many batteries, the smart Thomas train thought for a moment. Please come to the electric Thomas train and the Finlay train to help. The electric Thomas train just used the No. 7 battery.
Smart they found a circular train track, let the electric Thomas train loaded with batteries, pulled the train and the alloy train Finley to run on the track, note the distance and time of use of the small train.
Of course, because the 7 types of batteries have different weights, please see the figure below:
Therefore, in order to ensure the fairness of the experiment, taking the 11.6g as a benchmark, a weight was placed on the insufficient battery, and the fairness of the experiment was achieved.
This is a video of a small train traveling on a railroad track. There is a magnetic head on the roof of the electric Thomas train, and the number of windings that can be bypassed can be recorded with the sensor head set on the side of the track to calculate the distance traveled.
Finally, the distance traveled for each type of battery (note that there is mileage on the stopwatch. To reduce the error, the result is set at 999cm per turn. The diameter of the actual track is about 30cm, and the circumference is 94.2cm. Because the 7-cell battery test cycle is set to 999cm per cycle, the horizontal comparison of the results is equal, and will not be affected.)
The following table shows the time spent on some converted data and manual measurement (because the time the train used to wrap around on the track has already put the watch into the standby state, so the time on the stopwatch is not accurate, so it can only be changed. With artificial timing, this is really an individual effort, and some have performed two counts before accurately.) Through the data table to see the resistance of lithium iron has an inherent advantage, the results are very good, and the average speed is also far ahead, is a strong endurance battery. In alkaline batteries, the average speed is similar, and the mileage displayed is not too different. Shuanglu slightly leads. Carbon battery domestic brand swan exceeds Toshiba's performance, and mine photo as rechargeable battery, I think the performance is also good. (The average speed in the table below is blocked by the watermark is 7.9 circles/minute)
After completing the above experiments, Thomas Train also asked Electric Thomas to perform a rigorous experiment by running in a refrigerator at -16 degrees Celsius to see how the battery was used at low temperatures.
The first time to play was to win the top-ranking lithium-iron battery in the above experiment. However, after a half-hour refrigerator trip, an unexpected situation occurred. Please see the video below. Electric Thomas tires are slipping, although the tires are still spinning. However, it is no longer possible to test the driving range normally, so the experiment can only be stopped.
In the end, Thomas found the fat manager and gave the experimental data. The evaluation was completed!
The fat manager eventually put Thomas's experiments and data into the hands of the Count Tomoff. According to Thomas's experimental data, Tommy got the following summary :
In the low-cost carbon battery, the swan battery performance is better than Toshiba, the price is also a lot lower, with a high cost performance, but overall the carbon battery's battery life is still a lot worse.
In the evaluation of three alkaline batteries, Shuanglu battery with low prices, good results won the championship, Nanfu battery performance is fairly good, Duracell has fallen to the bottom of the three positions.
Ray Photo is the only rechargeable battery among the 7 types of batteries. Its performance is slightly worse than that of disposable alkaline batteries, but it is superior to recyclability, and its price is not high. It is extremely high with chargers and attentive users. Expressiveness.
Lithium-Iron-Battery Battery won the championship with almost twice the second place. Unfortunately, the price was high, and it matched the extremely long shelf life and liquid leakage. It is a local battery with "lazy cancer".
- Purchase link:
The old rules finally attached to the above seven types of battery purchase links. Because most of the battery I bought in the supermarket of the physical store, you can buy a relatively close to the factory, the price and online shopping there are some differences, please pay attention to friends to pay attention to screening.
No. 1: Swan Battery
These types of batteries were searched by Jingdong, Tmall, and Taobao, but unfortunately they were not sold. Such batteries are usually sold in physical stores and supermarkets.
No. 2: Toshiba battery
This 12-cell battery was purchased at the supermarket for 9.9 yuan, and the online shopping was slightly more expensive.
No. 3: Duracell Battery
The Duracell is still cheaper in large supermarkets.
No. 4: Nanfu battery
At the moment, it's still a little more cost-effective to look at this section. There are 4 pieces, 8 pieces and so on.
No. 5: Shuanglu Battery
Shuanglu Battery Supermarket 3.9 yuan, and Jingdong price difference is not large.
No. 6: Ray camera rechargeable battery
In fact, if you have the patience and care to use a large number of high-use electrical equipment, the rechargeable battery is still the best choice.
No. 7: time battery
A new type of lithium iron battery is used exclusively for high-efficiency purposes. In fact, the remote control is used at home, but it is not necessary to change it for N years, and it is not worried about leakage. Use in high-power appliances can achieve better results.
Finally to the egg - Experimental Highlights
PS: The entire experiment took nearly five days. In the middle because the artificial timing sometimes missed the point where the train stopped, it was necessary to reload the battery for experimentation. I hope that if this evaluation is helpful to you, value-friends should not scold the silver in their hands! Support it! There is no reward, and leaving a word is also the greatest encouragement to the author!
The off-grid inverter is an inverter used in off-grid solar power generation systems. Its main function is to convert the direct current generated by solar panels into alternating current to meet the power demand in off-grid environments, such as in remote areas, In camping, boats, or moving vehicles.
Main effect:
Converts the direct current generated by solar panels into alternating current to supply the power needs of homes, mobile devices, or other electrical appliances.
Off-grid inverters are usually equipped with battery energy storage systems, which store excess power so that they can continue to supply power when the solar panels cannot generate enough power.
Differences from On-Grid Inverter:
Connection method: Off-grid inverter is an inverter used in the off-grid system and does not need to be connected to the grid. They are often used in places where there is no access to the grid, such as remote areas, wild camping, or outlying islands.
Grid requirements: Unlike on-grid inverters, off-grid inverters do not need to meet grid requirements and standards because they are not connected to the grid. They can operate independently and can be adapted to different off-grid environments.
Self-sufficiency: The off-grid inverter is equipped with a battery energy storage system, which can store excess electricity so that it can continue to supply electricity when the solar panels are unable to generate electricity. This makes the off-grid system self-sufficient and not dependent on an external grid for power.
Application scenarios: Off-grid inverters are widely used in remote areas, camping, ships, mobile vehicles, and some special-purpose scenarios. On the other hand, grid-connected inverters are mainly used in home, commercial, and industrial photovoltaic power generation systems connected to the grid.
In general, the main function of the off-grid inverter is to convert the direct current generated by the solar panels into alternating current to meet the power demand in the off-grid environment and achieve self-sufficiency by being equipped with a battery energy storage system. In contrast, on-grid inverters connected to the grid are mainly used to integrate solar power into the grid, realize the interaction between solar power and the grid, and comply with the requirements and standards of the grid.
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