18650 lithium battery assembly method
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2023/05/29 11:32:39
Lithium-ion battery (Li-ion, LithiumIonBattery) : Lithium-ion battery has the advantages of light weight, large capacity, no memory effect, so it has been widely used -- many digital devices have adopted lithium-ion battery as a power supply, although its price is relatively expensive. The energy density of lithium ion battery is very high, its capacity is the same weight of nickel metal hydride battery 1.5~2 times, and has a very low self-discharge rate. In addition, lithium-ion batteries have almost no "memory effect" and no toxic substances, which are also important reasons for their widespread use. Also please note that the lithium battery external generally marked with English 4.2 Vlithiumionbattery (lithium battery) or 4.2 Vlithiumsecondarybattery (lithium secondary battery), 4.2 Vlithiumionrechargeablebattery (rechargeable lithium battery), Therefore, when purchasing batteries, users must see the signs on the surface of the battery block to prevent cadmium nickel and nickel-hydrogen batteries from being mistaken for lithium batteries because they do not see the battery type clearly.
As we know, the shell of 18650 battery is steel shell, there is no special battery spot welding machine, it is difficult to weld with electric iron. Of course, powerful battery fluxes are now available, and you can easily weld 18650 batteries with them and a regular soldering iron. But this strong flux is corrosive, not only to the battery case and positive electrode corrosion, but also to the soldering iron head. So how do you weld an 18650 battery and battery pack without a battery spot welder? Below, three elder brother with their own practical experience, step by step to teach you how to use the electric iron to weld 18650 battery and assembly into a battery pack.
goot is a powerful flux that is believed to have been used by many electric powders to weld batteries. It can also be used to weld stainless steel.
Note the following points when assembling the 18650 battery into a battery pack:
1. The battery is arranged neatly, which helps to facilitate the maintenance in the future. It is best to use the standard 18650 battery Cato
2, good welding, the most common welding method is the use of nickel welding machine spot welding. You can also use electric soldering iron, solder joints are in good contact
3. After welding, the circuit of each battery must be sorted out clearly
4, do a good job of waterproof and insulation, it is best to cut a piece of highland barley paper or asbestos material
5, the most important point, the internal resistance of the battery before welding, the current voltage error should not exceed 0.05V! Conditions must be added to the lithium battery special protection plate, to prevent overrush, overput
6, after welding, measure whether the voltage is good
7. The voltage of the newly assembled battery pack should be tested in groups after a period of use.
That's all you need to assemble a set of 18650 EV lithium-ion batteries, including a stainless steel battery case
This is accessory material, wire tape heat shrinkable film, and a voltmeter, voltmeter installed on the battery box to judge the battery power situation
The baffle plate and the support for fixing 18650 battery have one protective plate. Lithium battery must have a protective plate, otherwise the baffle plate and the support for fixing 18650 battery have one protective plate. Lithium battery must have a protective plate, otherwise it will be scrapped after one excessive discharge
The most critical is 18650 battery, electric vehicle must choose the power cell
Maintenance method while charging
1. If the electric vehicle is parked for a long time, it is necessary to check the power of the battery in a timely manner. The electric energy in the battery will gradually reduce under the parking state.
2, the service life of electric vehicle battery is subject to the number of charging, the general battery is more than 300 times, the average service life is about 2 years. Charging a battery too often can shorten its life.
3, when the battery is recharged, we must pay attention to the charging time, the general battery charging time is about 8 hours, we must wait for eight hours after the disconnect charging. The charging time should not be too long or too short. This will damage the battery. When the charger shows that the charging is complete, disconnect the power supply after a period of time, and wait until the battery is completely saturated to disconnect.
4, in the use of the charger to charge the battery should pay attention to check whether the charger indicator is working properly, if the charger should be charged to complete the time of the charger indicator does not show charging completion should pay attention to, should be the charger is broken, if continue to charge will cause battery bulge damage battery.
Installation and maintenance method
When the battery is placed on the electric vehicle, we should pay attention to the stability of the battery. Because many batteries are installed in a box which is very heavy, the impact will be very large during the driving process, we can put a sponge under the battery box in advance, and then put the gap between the battery and the electric vehicle seat with rubber cushion, and there will be rubber cushion when leaving the factory. Ensure the stability of the battery to prevent battery damage caused by shock during driving.
Driving middle maintenance law
1. Electric vehicles should pay attention not to directly use electric energy to start at the beginning, and the foot can be used to start when uphill loads, because the current required at the beginning will be very large, and the starting power will damage the electrode plate of the battery. So start with the foot to avoid damage to the battery.
2. In the process of driving, the electric vehicle should brake and start excessively frequently. If it is not easy to walk or the road section with many vehicles can walk slowly, the battery can be avoided because of the high current damage caused by frequent braking and starting.
3, electric vehicles in use if found on the indicator plate shortcomings of the indicator light on do not continue to drive, because the indicator light point indicates that has to the state of undervoltage battery, continue to use will damage the battery to shorten the battery life, even in the halfway can not be used, battery once undervoltage should be charged in use.
Cleaning and maintenance
Usually, we should pay attention to the battery shell should be installed firmly without gaps, and the dust should be cleaned up in time to avoid dust entering the interior and attaching to the battery. At the same time also pay attention to the water, do not put water into the battery, especially in rainy weather, this will cause battery discharge and electricity phenomenon damage the battery.
As long as the completion of these methods, I believe you are electric car lithium battery must be used for a long time.
When the battery is recharged, we must pay attention to the charging time, the general battery charging time is about 8 hours, we must wait for eight hours after the disconnect charging.
When placing the battery on the electric vehicle, pay attention to the stability of the battery
At the beginning of electric vehicles, we should pay attention not to directly use electric energy to start
If the electric vehicle is found in use on the indicator plate shortcomings, the indicator light will not continue to drive
Usually we should pay attention to the battery shell to install firmly do not have gaps, found that the dust has been cleaned up in time
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