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Lithium ion batteries: Lithium ion batteries have the advantages of light weight, large capacity, and no memory effect, making them widely used - many digital devices use lithium-ion batteries as power sources, although they are relatively expensive. Lithium ion batteries have a high energy density, with a capacity 1.5 to 2 times that of nickel hydrogen batteries of the same weight, and have a very low self discharge rate. In addition, lithium-ion batteries have the advantages of almost no "memory effect" and no toxic substances, which are also important reasons for their widespread application. Additionally, please note that lithium batteries are generally labeled with English 4.2V lithium-ion battery (lithium battery), 4.2V lithium-ion secondary battery (lithium secondary battery), or 4.2V lithium-ion rechargeable battery (rechargeable lithium battery) on the outside. Therefore, when purchasing batteries, users must carefully read the markings on the outer surface of the battery block to prevent cadmium nickel and hydrogen nickel batteries from being mistaken for lithium batteries due to unclear battery types.

We know that the outer shell of the 18650 battery is made of steel, and without a dedicated battery spot welding machine, it is difficult to weld with an electric soldering iron. Of course, there are also powerful battery fluxes available now, which can easily solder 18650 batteries with ordinary soldering irons. But this strong soldering flux is corrosive, not only to the battery casing and positive electrode, but also to the soldering iron head. So, how to weld 18650 batteries and battery packs without a battery spot welding machine? Next, with his practical experience, San Ge will teach you step by step how to use an electric soldering iron to solder 18650 batteries and assemble them into battery packs.

Goot strong soldering flux, I believe many electric powders have used it to weld batteries. It can also be used for welding stainless steel.

The following points should be noted when assembling 18650 batteries into battery packs:

1. The neatly arranged batteries help facilitate future maintenance. It is best to use a standard 18650 battery tray

2. Good welding, the most common welding method on the market is to use a nickel welding machine for spot welding. Electric soldering iron can also be used, and the solder joints have good contact

3. After welding, the circuits of each group of batteries must be organized clearly

4. Be waterproof and insulated, preferably by cutting a piece of barley paper or using asbestos material

5. The most important point is to check the internal resistance of the battery before welding, and the current voltage error should not exceed 0.05V! If conditions permit, a dedicated lithium battery protection board must be added to prevent over charging and over discharging

6. After welding, measure whether the voltage of each circuit is good

7. After using the newly assembled battery pack for a period of time, it is necessary to group and check the voltage of the batteries,

This is all the materials needed to assemble a 18650 electric vehicle lithium battery, including a stainless steel battery box

This is the accessory material, wire tape, heat shrink film, and a voltmeter. The voltmeter is installed on the battery box to determine the battery level

The partition and the bracket for fixing the 18650 battery, with one protective plate, must have a protective plate for the lithium battery, otherwise the partition and bracket for fixing the 18650 battery, with one protective plate, must have a protective plate for the lithium battery, otherwise it will be scrapped after one over discharge

The most crucial thing is the 18650 battery, and electric vehicles must choose power cells

Maintenance methods during charging

1. If an electric vehicle is parked for a long time, it is necessary to check the battery level in a timely manner. The electric energy in the battery will gradually decrease when parked. If the battery is found to be out of charge in a timely manner, it should be charged. Do not let the battery be in a state of lack of charge for a long time to avoid returning the battery.

2. The service life of electric vehicle batteries is limited by the number of charges, with a typical battery lasting over 300 times and an average service life of about 2 years. If the battery is charged too frequently, it will shorten its lifespan.

3. When recharging the battery, be sure to pay attention to the charging time. Generally, the charging time of the battery is about 8 hours, and be sure to wait for 8 hours before disconnecting the charging. The charging time should not be too long or too short. This will damage the battery. Once again, it was discovered that the charger indicated that the charging was complete and it would take some time to disconnect the power until the battery was fully saturated.

4. When using a charger to charge the battery, it is important to check if the indicator light on the charger is working properly. If the indicator light on the charger does not show that the charging is complete by the time it should have been charged, it should be noted that the charger is broken. Continuing to charge may cause the battery to bulge and damage the battery.

Installation and maintenance method

When placing the battery on an electric vehicle, attention should be paid to its stability. Due to the heavy weight of multiple batteries packed in one box, the impact force during driving can be significant. A sponge can be placed under the battery box in advance to absorb shock, and then the gap between the battery and the electric vehicle seat can be sealed with rubber. Rubber pads are always available at the factory to ensure the stability of the battery and prevent vibration and damage to the battery during driving.

Maintenance method during driving

1. When starting an electric vehicle, it is important to be careful not to use electric energy directly. Additionally, when carrying heavy loads uphill, you can use foot pedals to start, as the current required at the beginning of the journey can be high, which can damage the electrode plates of the battery. So you need to start with your feet to avoid damaging the battery.

2. During the driving process, electric vehicles need to brake and start excessively frequently. If it is difficult to walk or there are many vehicles on the road, they can travel slowly to avoid damaging the battery due to frequent braking and starting, which is caused by high current during startup.

3. If an electric vehicle is found to have a faulty indicator light on the indicator panel during use, do not continue driving because this indicator light indicates that the battery has reached an undervoltage state. Continuing to use it will damage the battery and shorten its lifespan. Even if it is used halfway, it cannot be used. Once the battery is undervoltaged, it should be charged before use.

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Cleaning and maintenance method

Usually, it is important to ensure that the battery casing is securely installed without any gaps. If dust is found, it should be promptly cleaned to prevent it from entering and adhering to the battery. At the same time, pay attention to draining water and do not let it enter the battery, especially in rainy weather, as this can cause battery discharge and damage.

As long as you complete these methods well, I believe your electric vehicle lithium battery will definitely take a long time to use.

When recharging the battery, be sure to pay attention to the charging time. Generally, the charging time of the battery is about 8 hours, and be sure to wait for 8 hours before disconnecting the charging.

When placing the battery on an electric vehicle, pay attention to its stability

When starting an electric vehicle, be careful not to use electric energy directly to start it

If an electric vehicle is found to have a defect on the indicator panel and the indicator light is on during use, do not continue driving

Usually, it is important to pay attention to the secure installation of the battery casing without any gaps. If dust is found, it should be promptly cleaned up

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