Loading and unloading speed in the warehouse of internal logistics is one of the key competitive advantages of any logistics company. Optimization of these processes inevitably comes down to the power source and battery quality of material handling equipment. Many people still use classic lead-acid batteries. In this article, we tell you why these batteries have become the past, tell you how to lose money because of them, and give you valuable tips on how to use expensive lithium batteries Instead of buying them! "。
Let's first say that lead-acid batteries are not even from the last century. The technology was patented in 1859 of the last century. Such an "ancient" invention has some inevitable disadvantages. Let's take a quick look at them.
● the electrolyte of lead-acid battery is a sulfuric acid solution. Therefore, the unpleasant smell, the gas released during charging, is an explosive factor. Because of this, an additional room, the charging room, must be provided.
● charging time is too long. Sometimes it takes up to eight hours to charge the battery.
● the lead-acid battery of many industrial vehicles cannot be disassembled quickly. It is fixed with bolts and takes 30-40 minutes to replace. As a result, you not only need to buy replacement batteries when you need to charge, but also often need to buy replacement machines!
● you must prepare several battery packs for each vehicle. Each set of equipment is heavy -- from hundreds of kilograms to a ton -- and additional equipment must be provided to transport and install them.
● failure to observe the complete charge discharge cycle, insufficient supervision of electrolyte density, violation of storage conditions and temperature system - all these factors have greatly reduced the service life of lead-acid batteries.
● moreover, the final efficiency is not high. Lead acid batteries lose 20% of their energy when charging. How much? We'll tell you later.
Of course, it is not to say that the technology of lead-acid battery has not changed since the 19th century. Manufacturers of lead-acid batteries have tried to make some innovations to improve them in some way. Therefore, there are gel cells and other subspecies in the market. In fact, all these 名媛直播 also emit gases, which has been directly explained in the manual - but the quantity is small, because the electrolyte is the same sulfuric acid solution, but in a combined state. The gel battery of electric forklift is very inefficient. They require up to 14 hours of charging time and cannot be used for multi shift operation. In addition, they perform very poorly at low temperatures.
So, since lead-acid batteries have so many disadvantages, why are they still more popular than modern and more advanced lithium-ion batteries? There are several answers to this question, but the basic answer is that lead-acid batteries are "cheaper".
Are acid batteries really cheaper?
Of course, the price tag of lead-acid batteries is significantly lower than that of more modern technologies such as lithium-ion batteries. However, is their cost really one order of magnitude lower than that of enterprises?
As we mentioned above, the lead-acid battery will lose 20% of its power (this energy will be converted into heat). Let's take a 48V 750A ? H acid battery as an example. In one cycle, considering the discharge rate of 80%, the battery feeds back 48 * 750 * 80% / 1000 = 28.8 kW. It is assumed that there is a cycle every day, and the service life is 5 years. If we have 250 working days a year, we have 36000 kilowatts of wasted energy. For example, in Moscow, the electricity charge for 1000 watt hours is about 7 rubles (about 0.53 yuan, excluding the night electricity price). This means that for each lead-acid battery, the enterprise loses about 250000 rubles (18883 yuan).
Boost and intermediate charging technology makes it possible to charge lithium-ion batteries in a short rest time. The battery can be charged 10-20% in 10 minutes and 60-80% during lunch break. It takes only two hours to fully charge a battery, which is 5 to 10 times faster than an acid battery! When an enterprise has to deal with 40 minutes of downtime to replace batteries, how much does it lose?
Here are some more numbers. Let's start with the fact that the life of acid batteries is several times shorter than that of cast batteries.
The service life of lead-acid battery is about 1200 charge discharge cycles. The maximum discharge depth shall not exceed 60%. This means that a battery with a nominal capacity of 100A ? h can produce 60100a ? H. Let's calculate. 100 a ? H x 60% x 1200 = 72000 a ? h is the energy you get over the life of an acid battery.
Let's compare it with a lithium-ion battery with a discharge depth of 80%. Its design cycle is 5000 times. Therefore, according to the calculation, 100A ? H x 80% x 5000 can "remove" 400000 a ? h throughout its service life. That's a big difference, isn't it?
What are the disadvantages of lithium ion batteries?
There are many myths surrounding lithium batteries: they will explode, will be ignited, fear of partial discharge (memory effect) and frosting, and are designed as a small number of cycles. But this is outdated information - all these problems have been avoided by new technologies, new safety batteries and heating devices.
The best proof of this is their widespread commercial use. Most portable devices and most private electric vehicles use lithium-ion batteries. It is predicted that the market demand will at least double in the next decade.
In addition, the battery in the telephone is different from the traction battery of special vehicles. The difference of traction battery lies not only in its high efficiency and safe "Chemistry", but also in the control unit (BMS). It can protect the battery unit from overcharge and deep discharge. If the BMS fails for some reason, each battery has a safety valve that will release the internal pressure to prevent the battery from exploding.
Nevertheless, the professional market is still conservative in this regard - many people still like to use outdated technology. The main reason is that the initial purchase cost of lithium-ion battery is very high, which can reach 2.5 million rubles.
Therefore, the owners of warehouse equipment prefer to use familiar acid batteries, and expect that the market conditions will change over time, and the lithium-ion battery technology will become cheaper and more affordable. But is it really worth losing money to wait for a brighter tomorrow?
How to use lithium-ion batteries without buying them?
We live in a beautiful era. With the help of special services, you can rent everything you need - equipment, tools, cars, accommodation. Shareware also entered the lithium-ion battery market for warehouse equipment. You no longer need to buy them to use them - you can simply rent them.
How big is its profit? Let's take a look at the quotation of Li sharing (a lithium battery leasing company in Russia).
According to the estimation on the company's website, the cost of purchasing a lithium battery with charger and its three-year maintenance is about 3.35 million rubles (39760 yuan). The cost of lithium battery in the same period was 21800 rubles (25800 yuan). This means that in this case, the cost savings of the enterprise have reached more than 1 million rubles (11800 yuan) per battery.
In view of the inconsistency of special equipment, the company designs lithium batteries according to the weight, size and voltage of customers.
There should be no headache for users in the form of maintenance. The company has a service network of partners and a large inventory of major spare parts. Therefore, the maintenance and repair of the battery can be carried out in a short time of up to 3 working days.
In this market, the mentality of renting has not stabilized - this is a fact. Nevertheless, leaving aside habits, its profits are much higher from a rational point of view. You can see this better when you compare renting lithium batteries with buying acid batteries. It's time to abandon what was invented in the 19th century and adopt more modern and economical solutions.
