How to maintain maintenance-free batteries

The electrode junction of the battery is a place where problems are likely to occur this season, so pay attention to checking at any time. Check every part of the circuit for aging or short circuit. Prevent batteries from retiring early due to excessive discharge. At the time of inspection, if green oxides are found at the junction of the electrode, remember to flush them with boiling water. If these green oxides are not removed, it will cause insufficient generator power generation, causing the battery to be in a state of loss of electricity, and if serious, it will cause the battery. Early scrapping, Or you can't drive. After flushing with boiling water, use compressed air to dry the water, and then spray a special protective agent to prevent the oxide layer from appearing again.

2, ignition system maintenance is related to whether the vehicle can start, so should carefully check the plug site to see if rust. Once rusted, use professional cleaning agent. In addition, the maintenance of spark plugs can not be taken lightly.

3, the charging system should be focused on checking whether the generator belt after the high temperature after the rain aging phenomenon or cracking occurs. If this is not the case, remember to see how tight the belt is. If the belt is too loose, it will cause the clamor of the belt and make the belt wear early; The belt is too tight, and it will cause the bias of the generator bearing.

Sometimes the engine fails to start on the road. As a temporary measure, you can ask other vehicles for help. You can use the batteries on their vehicles to start the vehicle, connecting the negative and negative poles of the two batteries, and the positive and positive poles. Connected.

The density of the electrolyte should be adjusted according to different regions and seasons according to standards.

In the absence of electrolytes should be supplemented with distilled water or special replenishment. Do not use drinking pure water instead. Because pure water contains a variety of trace elements, it will have a negative impact on the battery.

When starting a car, the uninterrupted use of the starting opportunity causes the battery to be damaged due to excessive discharge. The correct method of use is that the total length of time for each start-up car is not more than 5 seconds, and the start-up interval is not less than 15 seconds. In the case of multiple start still not the car should be from the circuit, Ignition coil or other aspects of the oil road to find the reason.

9, daily traffic should often check whether the battery cover holes in the air. If the battery cover is blocked, the resulting hydrogen and oxygen can not be discharged. When the electrolyte expands, the battery shell will be burst, affecting the battery life. One of the five major misunderstandings is: When using maintainance-free batteries, simply think that maintainance-free maintenance is no need for any maintenance. Myth 2: battery pole pile wiring column surface has corrosions do not need to deal with, as long as not loose can be. Corrosion appears on the outside, corrosion occurs on the inner surface of the junction column, resulting in an increase in the resistance value and affecting the normal charging and discharge of the battery. It must be handled in a timely manner. Myth 3: When the liquid surface is low, add electrolyte or drink pure water instead of distilled water. If the electrolyte containing sulfuric acid is added, the inner electrolyte concentration of the battery will increase, and boiling, acid fog, etc. may occur, which will seriously affect the service life of the battery; The use of drinking pure water instead of distilled water, pure water contains a variety of trace elements, has a negative impact on the battery. Myth 4: the density of electrolytes is not checked and adjusted, especially when winter comes, the battery capacity is insufficient. If you go to Hunan and other North areas, it will even cause the electrolyte to freeze. Myth 5: When the battery is used in winter, the starter is used continuously, causing the battery to be damaged due to excessive discharge.

Battery pole pile wiring column surface has corrosions do not need to be treated, as long as it is not loose can be. If corrosion appears on the outside, corrosion will occur on the inner surface of the junction column, which will cause the resistance value to increase and affect the normal charging and discharge of the battery, it must be handled in time.

When using maintenance-free batteries, it is simply wrong to think that maintenance-free means that no maintenance is required. Although maintenance-free can reduce maintenance costs and times, it is still necessary for external cleaning, so "maintenance-free" points more to the interior of the battery.

When the liquid surface is low, distilled water is used as much as possible, and pure water can not be used instead of distilled water, because pure water contains a variety of trace elements, which has a negative impact on the battery.

In order to prolong the service life of the battery and avoid breakdowns, we should pay attention to the following points in the maintenance of the non-maintenance-free battery:

The color of the electric eye must also be checked frequently for maintenance-free batteries. Green is full of electricity; Black is not enough electricity, need to be recharged; Gray or light yellow for the electrolyte is insufficient, because the maintenance-free battery can not add liquid, should replace the battery immediately.

The battery should be placed firmly in the car to prevent the battery connection from falling off due to vibration during driving and avoid power supply interruption.

Keep the surface of the battery clean. If solid oxide appears on the pole column, hot water should be poured in time to remove it, so as not to affect the conductivity between the pole and the junction column. After cleaning, wipe off the surface of the battery and butter the poles and wiring posts to ensure that the poles are not oxidized.

Check the height of the electrolyte at least once a month. For batteries without marking lines, the electrolyte can be added to a plate 10-15mm higher than the pole; Battery with two red lines, electrolyte can not exceed the upper red line.

The concentration of electrolytic fluid is adjusted according to different regions and seasons. The concentration of electrolytes in winter should reach 1.28 g/ml.

The long-used car should be started every other month or so, running at a medium speed of about 20 minutes.

The total time for each start-up is not more than 5 seconds, and the restart interval is not less than 15 seconds. In the case of multiple start-up still not the car should be from the circuit, Ignition coil or other aspects of the oil road to find the reason, after the fault is removed and the engine started.

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The difference between lithium-ion batteries and secondary batteries

Lithium-ion secondary batteries. The lithium ion secondary battery usually consists of an electrode assembly, a container containing the electrode assembly, and an electrolyte. The electrode assembly consists of two electrodes and partitions of opposite polarity. The partition comprises a porous membrane containing a cluster of ceramic particles. The porous membrane is formed by binding the granular clusters with a binder. Each particle cluster is formed by sintering or by dissolving and crystallizing all or part of the ceramic particles. The ceramic particle contains a ceramic material with a band gap. Each cluster can have the shape of a grape string or thin layer and can be formed by laminated scales or thin sheet ceramic particles.

Lithium-ion electricity is called lithium ion secondary batteries.

Lithium batteries are called primary batteries.

The four major differences between primary and secondary batteries

Structurally, the secondary battery undergoes reversible changes in the size and structure of the electrode during discharge, while the inner battery is much simpler because it does not need to adjust these reversible changes.

One battery.

The mass ratio and volume ratio of primary batteries are greater than that of ordinary rechargeable batteries, but the internal resistance is much larger than that of secondary batteries, so the load capacity is lower.

One battery.

The self-discharge of the primary battery is much smaller than the secondary battery. Batteries can only be discharged once at a time. For example, alkaline batteries and carbon batteries belong to this category, and secondary batteries can be reused.

Secondary batteries are more environmentally friendly than primary batteries. After one battery is used, it must be discarded, and rechargeable batteries can be reused. Next generation rechargeable batteries that meet national standards can usually be reused more than 1,000 times, which means that the waste generated by rechargeable batteries is less than one thousandth of one battery at a time. The advantages of secondary batteries are obvious from the point of view of reducing waste, resource utilization and economy.

The high current discharge performance of a large secondary battery in a primary battery is not as good as that of a secondary battery.

Under the condition of small current and intermittent discharge, the mass ratio of the primary battery is greater than that of the ordinary secondary battery, but when the discharge current is greater than 800 mAh, the capacity advantage of the primary battery will be significantly reduced.

A secondary battery, also known as a rechargeable battery or battery, refers to a battery that can be used to activate the active substance by charging after the battery is discharged.

Using the reversibility of chemical reactions, a new battery can be formed. When a chemical reaction is converted into electrical energy, it can also be used to repair the chemical system by electricity, and then use the chemical reaction to convert it into electrical energy, so it is called a secondary battery(rechargeable battery). The main rechargeable batteries on the market are "nickel hydrogen", "nickel cadmium", "lead acid(lead battery)", "lithium ion(including lithium battery and lithium polymer battery)" and so on.

The most common secondary battery is the lead battery, which is arranged alternately between two sets of raster plates. The positive plate is covered with PbO2, the negative plate is covered with Pb, and the electrolyte is a H2SO4 solution. The charging and discharging cycle of a rechargeable battery can reach thousands to tens of thousands of times, so it is more economical and practical than a dry battery.

The self-discharge of the secondary battery, also known as the charge holding capacity, refers to the holding capacity of the battery stored under certain environmental conditions under open circuit conditions. In general, self-discharge is mainly affected by manufacturing processes, materials, and storage conditions. Self-discharge is one of the main parameters for measuring battery performance. In general, the lower the battery storage temperature, the lower the self-discharge rate, but it should also be noted that too low or too high the battery damage can not be used, BYD conventional batteries require storage temperature range -20 ~ 45. After the battery is fully charged and open for a period of time, a certain degree of self-discharge is a normal phenomenon. The IEC standard stipulates that after the nickel-cadmium and nickel-metal hydride batteries are fully charged, the open circuit is shelved for 28 days at a temperature of 20 degrees and a humidity of 65 %. The discharge time of 0.2 C is greater than 3 hours and 3 hours and 15 minutes respectively.

Compared with other rechargeable battery systems, the self-discharge rate of solar cells containing liquid electrolytes is significantly lower, about 10 % per month at a temperature of 25 degrees.

According to a forecast released on July 21, 2016, by 2025, the global market size of large-capacity secondary batteries widely used in a generation of environmentally friendly cars, power storage, and power fields will expand from 2047.4 billion yen in 2015 to 4.1 times, reaching 8341.7 billion yen. The new generation of environmentally friendly vehicles will be the driving force behind the expansion of the market, and it is expected that by 2025, the share of the entire market will increase from 53 % in 2015 to more than 75 %. [ 1]

Lead batteries

Total reaction: Pb(s) + PbO2(s) + 2H2SO4(AQ) reversible symbol 2PbSO4(s) + 2H2O(L)

Discharge: negative Pb(s) -2e-+ HSO4-(AQ) = PbSO4(s) + H +(AQ)

PbO2(s) + 2e-+ HSO4-(AQ) + 3H +(AQ) = PbSO4(s) + 2H2O(L)

Total Pb(s) + PbO2(s) + 2H2SO4(AQ) = 2PbSO4(s) + 2H2O(L)

Electrolytic cell during charging

Cathode PbSO4(s) +2 e-H +(AQ) = Pb(s) + HSO4-(AQ)

Anode PbSO4(s) + 2H2O(L)-2e-= PbO2(s) + HSO4-(AQ) + 3H +(AQ)

Total 2PbSO4(s) + 2H2O(L) = Pb(s) + PbO2(s) + 2H2SO4(AQ)

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