If the consequences of second-hand battery cells are The charging effect is poor, the power supply life is short, and the stability is poor. The internal circuit of the mobile power supply is closely related to the stability and safety of the product. Any electronic product has a certain failure rate. If the manufacturer does not take protective measures, such as overcharge, overheating, overload, short circuit, and other protective measures, it is easy to quickly scrap the cell, or even cause product combustion or even explosion accidents.
Is it a power supply or a bomb?
The lithium ion rechargeable battery is composed of the following: battery cell+protection circuit board. This small electric core protection circuit board is the basis to ensure the personal safety of users, although theoretically mobile power supply The probability of accidents is lower than that of the lottery, but there have been several cases. In order to implement cost saving in the end, many profiteers not only cut corners on the circuit boards of their products, but also did not even have circuit boards in some absurdly cheap mobile power supplies, let alone the circuit boards for cell protection that are specially used to protect mobile power supplies.
The circuit board for protecting the electric core has two functions: 1. Protect the electric core, prevent the electric core from overcharging, discharging and overheating, extend the service life of the electric core, and extend the performance degradation cycle of the electric core; 2. Minimize the impact of circuit board faults such as short circuit and overload on the cell, and minimize the possibility of combustion and explosion of the cell. High quality mobile power products, in addition to the standard configuration of the circuit board for cell protection, also have a higher requirement on the selection of the cell - the cell must have a pressure relief valve to prevent electrolyte explosion.
The safety of different types of cores is also different. The surface of the polymer cell is a flexible material. If a short circuit causes the cell to bulge, it will generally crack without explosion, so the safety is good; The 18650 cell is packed in steel shell, which will explode in the most serious case. At present, many mobile power supplies in the market use low-quality 18650 cells in order to reduce costs,
If you buy a mobile power supply, you don't even have a cell protection circuit board. Is it still a mobile power supply? It is clearly a time bomb that I don't know when it will explode. If the quality is not up to standard, it is like walking around with a time bomb, so when you buy products, you should comprehensively measure the brand and price of the products, and not blindly pursue the cheapest.
Although the cost of the whole set of protective circuit protection measures is not high, the total cost will not exceed 5 yuan, but after careful calculation, For small and medium-sized enterprises, One mobile power can save 5 yuan, and 100000 can save 500000 yuan, which is a big profit. The security protection that is reduced layer by layer, even if it is a few cents of investment, the black hearted manufacturers will not hesitate to save, of course, the personal safety of consumers will also be saved. The author still suggests that we should not take this problem lightly. As the saying goes, don't be afraid of ten thousand, just in case, the author suggests that you should never buy too cheap mobile power. If your mobile power is really in trouble, it will be penny wise and pound foolish.
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