Chargeable lamp and chargeable over-voltage protection circuit thereof
A charging overvoltage and protection circuit technology, applied in the field of lighting, can solve problems such as combustion and explosion, charger and rechargeable battery circuit failure, rechargeable battery failure, etc., to achieve the effect of avoiding damage and avoiding failure
Inactive Publication Date: 2015-04-29
SHENZHEN OCEANS KING LIGHTING ENG CO LTD +1
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[0004] The purpose of the embodiments of the present invention is to provide a charging overvoltage protection circuit for rechargeable lamps. The circuit between the rechargeable battery and the rechargeable battery fails, causing the rechargeable battery to fail due to overvoltage or even burn and explode
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[0016] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0017] Aiming at the problems existing in the prior art, the present invention proposes a rechargeable lamp and a charging overvoltage protection circuit thereof. The charging overvoltage protection circuit is set in the rechargeable lamp and connected between the DC power plug and the rechargeable battery. By setting the protection voltage value of the rechargeable battery, it can detect in real time whether the charging voltage input through the DC power plug exceeds the protection voltage. value to achieve overvoltage protection for rechargeable batteries.
[0018] figure 1 The circuit princip...
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The invention belongs to the technical field of lamps, and provides a rechargeable lamp and a rechargeable over-voltage protection circuit thereof. The rechargeable over-voltage protection circuit is arranged in the rechargeable lamp and connected to a position between a DC power plug and a rechargeable battery. By setting a protecting voltage value of the rechargeable battery, and detecting whether a charging voltage input through the DC power plug exceeds the protecting voltage value or not in a real time manner, the overvoltage protection of the rechargeable battery is realized. If the charging voltage input through the DC power plug is lower than the protecting voltage value , an external charger can be used for normally charging the rechargeable battery, and if the charging voltage input by the DC power plug exceeds the protecting voltage value, the external charger stops charging the rechargeable battery, so that even when the situation that chargers are used in a mixed manner exists, the damage of overvoltage to the rechargeable battery can also be effectively avoided, and the situations that the rechargeable battery becomes invalid and even the accident of combustion explosion occurs due to overvoltage are avoided.
Description
technical field [0001] The invention belongs to the technical field of lighting, and in particular relates to a rechargeable lamp and a charging overvoltage protection circuit thereof. Background technique [0002] Currently, portable rechargeable lamps (such as rechargeable flashlights, rechargeable mosquito killer lamps, etc.) are more and more widely used. During the use of the rechargeable lamp, the charger needs to be used to charge the internal rechargeable battery. Generally, the charger adopts three-stage charging for the rechargeable battery: the first stage is the constant current charging stage, in this stage, the charging current of the charger remains constant, the charged power increases rapidly, and the voltage of the rechargeable battery rises; the second stage is In the constant voltage charging stage, when the charging voltage reaches the protection voltage of the rechargeable battery, it enters this stage. In this stage, the charging voltage of the charge...
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IPC IPC(8): H02H7/18F21L4/08
Inventor 周明杰张飞
Owner SHENZHEN OCEANS KING LIGHTING ENG CO LTD