Self-protection circuit for charging base and charging base
A charging base, self-protection technology, used in safety/protection circuits, charging/discharging current/voltage regulation, battery overcharge protection, etc., can solve problems such as charging base burning, avoid overcharge damage, improve safety and Reliability, the effect of avoiding short circuit failure
Pending Publication Date: 2019-03-08
GEER TECH CO LTD
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Problems solved by technology
This charged state has potential safety hazards, and short-circuit faults are prone to occur, which can lead to dangerous accidents such as burning of the charging base.
Method used
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Embodiment Construction
[0022] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0023] In this embodiment, in order to increase the self-protection function on the charging base, so that the charging column on the charging base can be in an uncharged state when no electronic products are placed on the charging base, so as to prevent short-circuit faults, a self-protection is specially added to the charging base. circuits, such as figure 2 As shown, it includes Hall element K, AND gate U1, power switch Q1, controller MCU and other main components. In order to cooperate with the charging base of this embodiment to detect the placement state of the electronic product, it is necessary to add a magnet to the electronic product. When the electronic product is close to the charging base, the magnet in the electronic product will cause the magnetic field around the charging base to change. The Hall elemen...
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The present invention discloses a self-protection circuit for charging bases and a charging base, the self-protection circuit comprises: a charging column, a power switch, an AND gate, a Hall element,and a controller; wherein the power switch is connected in a charging current transmission line connected to the charging column; the Hall element is connected to the an first input terminal of the AND gate, and is set to a first state when no magnet in an electronic product is sensed, and is set to a second state when the magnet is sensed; the controller is connected to the Hall element, the first IO port of the controller is connected to a second input terminal of the AND gate; the controller controls the AND gate to output a high level or a low level according to state changes of the Hallelement, thereby controlling the power switch to connect or disconnect the charging current transmission Line to change charging state of the charging column. The circuit can control the charging column in the charging base to be uncharged when no electronic product is placed in the charging base, so as to eliminate safety hazards; at the same time, can avoid overcharge damages of the electronic product.
Description
technical field [0001] The invention belongs to the technical field of charging devices, and in particular relates to a circuit design applied to a charging base. Background technique [0002] With the rapid development of electronic technology, there are more and more wearable electronic devices, such as smart watches and smart bracelets, which bring great convenience to people's daily life. The current wearable electronic devices have a built-in rechargeable battery to supply power to the system circuit of the device, and an external charger (plug type or base type) can be used to charge and store the rechargeable battery. [0003] Currently, charging bases for smart watches and smart bracelets generally include a table top 1 for carrying smart watches and smart bracelets, a charging post 2 installed on the table top 1, and a power adapter 4 or a USB data cable. USB interface 3, such as figure 1 shown. When the smart watch and smart bracelet are placed on the charging b...
Claims
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CPCH02J7/0077H02J7/0031H02J7/0044H02J7/0047H02J7/007H02J7/00302
Inventor 梁亮王星磊
Owner GEER TECH CO LTD