Lithium battery protection card buying guide?

Introduction Lithium battery protection card buying guide? Lithium batteries are divided into lithium ion batteries and lithium polymer batteries. The electrolyte of lithium ion batteries is mobile and the electrolyte of lithium polymer batteries is solid, so

Lithium battery protection card buying guide?

Lithium batteries are divided into lithium ion batteries and lithium polymer batteries. The electrolyte in lithium ion batteries is fluid, while the electrolyte in lithium polymer batteries is solid. Therefore, lithium-ion batteries are more unstable than lithium polymer batteries if they are hit by an external force or use a charger that does not meet the requirements. standard, this may cause the battery to explode. The batteries used in many portable electronic products such as mobile phones, laptops and digital cameras are lithium batteries. Buying poor quality lithium batteries is like placing a “time bomb” around you. Therefore, consumers should pay attention to the following points when purchasing lithium batteries:

1. If the capacity is clearly indicated. Lithi batteriesum without clearly marked capacity (such as 2200 mAh or 4400 mAh) are likely to be unwanted batteries reassembled using lower quality battery cells or recycled battery cells. There are many inexpensive lithium batteries on the market, made from recycled battery cells or disassembled cells. Although they are cheap, they have a short lifespan and unstable quality can damage the phone or even explode.

2. If standby time is guaranteed. Standby time is the continuous use time of the lithium battery after it is installed in the mobile phone until the next charge. Generally, lithium batteries sold in the market cannot guarantee standby time to customers. Indeed, the quality of the battery is unstable. Many cheap batteries use poor quality cells, so standby time isvery short.

3 Whether it has a safety protection circuit. The characteristics of lithium batteries determine that lithium batteries should be equipped with protective plates to prevent overcharge, overdischarge, short circuit, etc. Lithium batteries without protective plates may deform, leak or explode. Facing fierce price competition, various battery packaging manufacturers are looking for cheaper protection circuits, or simply omitting this device, leaving the market flooded with lithium batteries with the risk of explosion. Consumers cannot determine whether there is a protective circuit board from its appearance, so it is better to choose a reputable trader to purchase it.

"When purchasing lithium battery protection boards, it is best to purchase them from physical manufacturers. Quality and safety can be guaranteedties. When purchasing, pay attention to the marking parameters on the product and its detailed attributes to avoid. the bad purchase. The above are the things you should pay attention to when purchasing lithium battery protection boards. I hope they can help you. "

First of all, we need to take two steps.

First: What is the protection board? Let's take a single battery as an example lithium with a nominal voltage of 3.7

The image is a parameter of the protection board 3.7 In the picture we see that the parameters of the protection board are for the. protection of the battery node.

Aiming at the current, voltage, temperature during operation and a short circuit protection test, it can be seen from the figure that this parameter exists independently. said, whether the battery capacity is 2A or 3A, the characteristic point of protection of the protection card remains unchanged.

Second: the size of the battery capacity! Let's take the same example of a lithium battery with a nominal voltage of 3.7V.

The size of the battery capacity is related to the size of the battery cell. The larger the battery size, the larger the capacity., the smaller the size, the smaller the capacity.

So what is the difference between adding a skid plate to a large capacity battery and a small capacity battery manufacturer's skid plate? The answer is no difference.

The structure of the protection cards of both is exactly the same. Some require different voltage cutoff points, and only one of the ICs will be replaced for adjustment. Some will replace the MOS tube depending on the overcurrent.

Under normal circumstances, the same protection card can be usede on batteries of different capacities but the same nominal voltage, there is therefore no direct relationship between the protection card and the capacity.

If you agree with my answer, follow me and let's learn theoretical knowledge together. ?


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