Low-battery battery protection method and circuit and its lamp
A protection circuit, low battery technology, applied in battery circuit devices, emergency protection circuit devices, secondary battery charging/discharging, etc., can solve the problems of many faults, complex circuits, and high manufacturing costs, and achieve simple circuit structure and power consumption. Small, low manufacturing cost effect
Active Publication Date: 2017-06-16
SHENZHEN OCEANS KING LIGHTING ENG CO LTD +1
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- Description
- Claims
- Application Information
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Problems solved by technology
[0004] The circuit of the existing battery protection technology is relatively complicated, the manufacturing cost is high, and there are many faults
Method used
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[0019] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0020] The low-power battery protection method and the low-power battery protection circuit of the present invention prevent the rechargeable battery with a shutdown chip from being used under low power.
[0021] The low battery protection method is: using a fast discharge circuit to provide a discharge channel for the rechargeable battery; using a discharge monitoring circuit to control the connection or disconnection of the discharge channel of the fast discharge circuit; according to the working voltage of the rechargeable battery, the output of the discharge monitoring circuit is controlled. Signal for the fast discharge loop.
[0022] The low-battery battery protection circuit includes a fast discharge circuit 1 and ...
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The invention provides a low electricity battery protection method and circuit and a lamp thereof so that a rechargeable battery with a turn-off chip can be prevented from being used in a low electricity mode. A discharge current-limiting resistor is connected in series with a discharge diode and a discharge triode and connected at the two ends of the battery in a bridging way. A discharge bias resistor is connected in series with a monitoring triode and connected at the two ends of the battery in the bridging way. The collection electrode of the monitoring triode is also connected with the base electrode of the discharge triode so that connection or disconnection of the discharge triode is controlled. A voltage attenuation resistor is connected in series with a monitoring bias resistor and then connected at the two ends of the battery in the bridging way, wherein the series-connected joint is also connected with the base electrode of the monitoring triode so that connection or disconnection of the monitoring triode is controlled. When electricity of the battery is close the exhausted end, the monitoring triode is disconnected and the discharge triode is connected so that the battery is rapidly discharged, the residual electricity of the battery is completely discharged and the battery enters into the state without electricity discharge, and thus a user is promoted to charge the battery. The circuit structure is simple, power consumption is low and manufacturing cost is low.
Description
technical field [0001] The invention belongs to the field of battery technology, and relates to battery power management technology, in particular to a battery protection circuit. Background technique [0002] In the lamps without power indication, the user does not know the remaining power of the battery due to the lack of power indication function during the use of the battery, which affects the user's timely charging. [0003] A control circuit for LED lamps in the prior art includes a control module, a drive module and a step-down and voltage-stabilizing module. The DC voltage provided by the battery is passed through the step-down and voltage-stabilizing module to generate a DC low voltage, which supplies power to the control module. , the battery also directly provides the working voltage for the drive module. The control module samples the DC voltage provided by the battery to obtain a sampled value of the power supply voltage. If the sampled value of the battery vol...
Claims
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IPC IPC(8): H02H7/18H02J7/00H01M10/44
CPCY02E60/10
Inventor 周明杰屈煜
Owner SHENZHEN OCEANS KING LIGHTING ENG CO LTD