May I ask what temperature is appropriate to place lithium batteries in the refrigerator?

There are still some differences in the storage methods of different batteries lithium

Hope you can check it online. Combine the information with your own actual situation and you will know in more detail

Does the cruising range of lithium batteries have any impact during the cold winter?

Conditions of use of lithium batteries

When using lithium batteries for electric forklifts, the high temperature in the working environment should not exceed 60 ° and the low temperature should not be lower than -5°. Beyond these two extreme working conditions, the battery requires productionnon-standard.

Note: Lithium batteries can be used in cold storage for more than 1 hour (above -20°), but cannot be placed or placed. charged in cold storage

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Do not overdischarge

Stop using it when the battery level is lower than the alarm, otherwise This will cause battery failure and cannot be used. The manufacturer has to send someone to fix it. No battery should be over-discharged, otherwise it will damage the battery. < /p>

If the battery is not to be stored for a long time, the battery should not be fully charged but should be 70% charged for storage.

Storing the battery battery with a full battery will damage the battery core. Typically, 50% to 70% of the energy is stored.

Lithium iron phosphate batteries do not explode

Electric forkliftsThey use lithium iron phosphate batteries, which are safer than ternary lithium batteries

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Lithium batteries will only burn under extreme working conditions such as short- circuit, strong extrusion and collision, high temperature (lithium iron phosphate will burn slowly and will not explode in an accident)

Storage environment

1)The Battery system should be stored in a clean, dry and ventilated indoor environment with an ambient temperature of 20 ± 5° and a relative temperature not exceeding 75%.

2) Contact with corrosive objects should be avoided and should be kept away from heat sources at least 2M and protected against moisture and humidity.

3) The positive and negative terminals of the battery must not fall into any metal or other conductive foreign object.

4) The battery must be protected from mechanical shock and high pressure.

Comment storing lithium-ion batteries

Lithium batteries can last in the cold of winter indoorsthe process has an impact.

The working principle of lithium-ion batteries is that the internal electrolyte changes through chemical reactions, causing a potential difference between the positive and negative electrodes to generate current. In a low temperature environment, the electrolyte moves very slowly, which affects the transfer activity of lithium ions between the positive and negative electrodes, resulting in a decrease in the charging and discharging performance of the battery.

To put it simply, in a low temperature environment, it is not that the lithium battery is really discharged, but that it is powered but cannot be released normally. According to analytical data, the capacity of ordinary lithium batteries will be reduced by 20% at zero degrees Celsius, and when it haswill reach minus 10 degrees Celsius, the capacity might only be about half.

Detailed information:

1. Find a warm place to charge

When the ambient temperature is below 0℃, when charging an electric vehicle, the system will automatically charge. the battery first. The battery cell is heated When the battery cell temperature exceeds 5°C, vehicle charging actually begins. Some electric vehicle owners may feel that the charging speed of electric vehicles suddenly slows down in winter. This actually means that there is additional time to heat the battery cells before recharging the vehicle.

Therefore, when car owners usually charge their car, they should tryto do so in underground parking lots, closed garages and other places. This will help improve battery activity, not only reducing loss of cruising range, but also improving charging efficiency and saving time.

2. Charge for a short time before traveling

The electric car still had 60% or 70% of its power the day before, but when I started the car the next morning, I found that it only 60 or 70% of the power remained, or even less. Some call this situation a “power outage.” In fact, this “power outage” is not a fault, but is caused by low temperature. When an electric vehicle is driving, the battery is in a continuous discharge state, the temperature will be relatively high, and the battery voltage will also be relatively high. The remaining power of the electric vehicle displayed at this time is a normal value.

However, after being parked at low temperatures overnight, the battery cooled and the voltage dropped. At that time, the car's system will automatically adjust the displayed power and cruising range, which creates a ". The illusion of "running out of power". In this case, you usually just need to get out in advance and charge the battery for about 10 minutes

3. Drive steadily and not in a hurry

When driving an electric vehicle, you should start slowly and avoid driving. violent such as sudden deceleration, sharp turns and sudden braking Good driving habits can effectively reduce the speed of battery consumption. The time between starting the car should not exceed 5 seconds. between restarts should not be less than 15 seconds

If the battery mileage decreases too much, go to the 4S store to check.r the car battery in time, replenish the battery electrolyte in time and adjust the electrolyte proportion.

People's Daily Online -Mobile phone turns off automatically when frozen? Lithium battery products undergo extreme cold test

People's Daily Online - Electric vehicle battery life shortened in winter How to "survive winter"

Lithium-ion batteries must be fully charged before storage. It can be stored for more than six months at 20°C, which shows that lithium-ion batteries are suitable for low temperature storage. Someone once suggested that it was actually a good idea to keep rechargeable batteries in the refrigerator compartment. Lithium-ion batteries have a self-discharge phenomenon. Long-term storage will cause the battery to over-discharge, destroy the internal structureof the battery and will shorten its lifespan. Therefore, lithium-ion batteries stored for a long time should be recharged every 3 to 6 months, that is, charged to a voltage of 3.8 to 3.9 V (the best storage voltage of lithium batteries is approximately 3.85 V).

Notes

When using lithium-ion batteries, pay attention to three points: When using lithium-ion batteries, it should be noted that the battery will enter a sleep state after being left for a period of time, the capacity is lower than normal, and the usage time is also shortened. However, lithium-ion batteries are easy to activate. After 3-5 normal charge and discharge cycles, the battery can be activated and restored to its normal capacity. Due to the characteristics of the lithium battery itself, it has almost no memory effect. Therefore, users do not need tomethods or special equipment during the activation process of new lithium batteries. Not only is this true in theory, but in practice the “natural activation” method of loading using standard methods from the start is best.

Regarding the issue of “activating” lithium-ion batteries, many opinions believe that the charging time should be more than 12 hours and repeated three times to activate the battery. This claim that "the first three charges require more than 12 hours" is obviously a continuation of the claim regarding nickel batteries (such as nickel-cadmium and nickel-metal hydride). This statement can therefore be considered misinformation from the beginning. There is a very big difference in the charging and discharging characteristics of lithium ion batteries and nickel batteries. All technical informationSerious studies point out that overcharging and overdischarging will cause huge damage to lithium batteries, especially liquid lithium ion batteries. Therefore, it is best to charge according to standard time and methods, especially not to charge for more than 12 hours. Additionally, lithium-ion batteries or chargers automatically stop charging once the battery is fully charged. There is no so-called “maintenance” charge that lasts more than 10 hours with nickel battery chargers. In other words, if your lithium-ion battery is fully charged and placed on the charger, it will charge in vain. And no one can guarantee that the characteristics of the battery charge and discharge protection circuit will never change and the quality is foolproof, so the battery will be on the verge of danger for a long time. This is another argument against a long charge.

On some machines, if you do not remove the charger after charging for more than a certain time, the system will not only stop charging, but also start a discharge-charge cycle. Perhaps the manufacturer of this approach has its own agenda, but it obviously hurts battery life. At the same time, long-term charging takes a long time and often has to be done at night. Judging from the power grid situation, the voltage at night is relatively high in many places.And the fluctuations are large. As previously mentioned, lithium-ion batteries are very delicate and much less resistant to charge and discharge fluctuations than nickel batteries, which presents additional dangers.

In addition, another aspect that cannot be ignored is that lithium-ion batteries are also not suitable for over-discharge, and over-discharge est also very detrimental to the battery. This brings us to the next question. Since the number of charges and discharges is limited, the lithium battery should be exhausted as much as possible before recharging. However, the experimental table data on charge and discharge cycles of lithium-ion batteries is listed as follows:

Lifetime (10% DOD): >1000 times

When it is necessary to charge to meet upcoming important events that are expected to cause charged communication, even if the battery still has a lot of energy remaining, simply charge it in advance, because there is no charge. actual loss of "1" Life per charge is only "0.x" times, and often this x will be very small.

The principle of recharging the remaining battery is not to go to extremes. A widely spread saying, like long-term charging, is "try to exhaust the machine's battery, and it is better to use automatic shutdown." This approach is actually only applied to nickel batteries. The goal is to avoid the memory effect. Unfortunately, it is spreadingalso on lithium-ion batteries. There was an example of someone continuing to use the machine without charging it until it automatically turned off after a low battery warning appeared. As a result, the machine in this example was unresponsive during subsequent loading and startup and had to be sent to customer service for repair. This is actually because the battery is too discharged and the voltage is too low, so it does not have normal charging and power-on conditions. To summarize, the most important tips for charging and discharging lithium-ion batteries in use are: 1. Charge according to standard time and procedures, even for the first three times. 2. When the machine battery is too low, a prompt will appear; appears, charging should be started as soon as possible; 3. Lithium battery activation does not require methodsspecial. The lithium battery will activate naturally during normal use of the machine. If you insist on using the popular "first three charges and 2 hour activation" method, it will actually not be effective.

Therefore, all practices that seek 12 hours of ultra-long charging and use lithium-ion batteries to automatically shut down are wrong.

4. Pay attention to fire prevention when using lithium batteries

Many people may only be familiar with lithium-ion batteries in mobile phones. In fact, it is used in many household appliances. There is no doubt that the advantages of lithium-ion batteries, such as high efficiency and light weight, make them rapidly popularized and applied.

Lithium batteries have the advantage of being light, efficient and resistant to lows temperatures (-40°C). A 0.3mm thick lithium battery, the size of a postage stamp, can be used continuously for more than 5 years. and is widely used in many high-end household appliances and mobile phones.

Lithium-ion batteries are different from the water-soluble zinc chloride and potassium hydroxide electrolytes of manganese batteries and alkaline dry cell batteries currently in use. They use organic solvents. manganese dioxide, lead fluoride, sulfur chloride and other materials. Compared with the zinc chloride used in the negative electrodes of general batteries, the metal lithium sheet used in the negative electrode has a stronger ionization tendency and a larger voltage difference between the positive and negative electrodes, which improves the operating efficiency of lithium-ion batteries.

However, lithium-ion batteries generateoften emit heat and burn during use. In mild cases, it affects the use of the host, and in severe cases, it may burn the host and cause a fire. There have been numerous house fires in Japan caused by the heat and burning of lithium-ion batteries.

So why do lithium-ion batteries heat up and burn? It turns out that when many materials in lithium-ion batteries come into contact with water, they can undergo violent chemical reactions and release a large amount of thermal energy, causing heating and burning. The manganese dioxide contained in the positive electrode of lithium batteries can generate heat when exposed to a small drop of water. When the sulfur chloride in lithium batteries comes into contact with water, it generates hydrochloric acid and sulfur dioxide and releases thermal energy.that. Several factors make lithium batteries a “fire” in life. Therefore, people should pay attention to waterproofing and waterproofing when using lithium batteries. . Humidity. After various hosts are out of service, lithium batteries should be removed and stored in a dry and low temperature place to prevent and avoid house fires caused by improper use of lithium batteries.