A system overcurrent protection circuit applied to a control circuit board of a floor sweeping robot

An overcurrent protection circuit and control circuit board technology, applied in battery overcurrent protection, safety/protection circuits, emergency protection circuit devices, etc., can solve the problems of shortened life, increased internal resistance, decreased capacity, etc. Effect

Inactive Publication Date: 2019-01-04
SHENZHEN UMOUSE TECH DEV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The internal circuit system of the sweeping robot is a more important part in the actual application process. In systems powered by lithium batteries such as sweeping machines, if the lithium battery is over-discharged, the capacity will decrease, the internal resistance will increase, and the lifespan wi

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  • A system overcurrent protection circuit applied to a control circuit board of a floor sweeping robot

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[0013] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

[0014] See figure 1 , The system overcurrent protection circuit 1 of the present invention applied to the control circuit board of a sweeping robot includes a battery interface connected to a power source, a power switch interface connected in series with the battery interface, and several load circuit units connected in parallel; Between the power switch interface and each load circuit unit is serially connected a self-recovery fuse that can become a high resistance state when the current suddenly increases; one end of each load circuit unit is connected to one end of the self-recovery fuse, a...

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Abstract

The invention provides a system overcurrent protection circuit applied to a control circuit board of a floor sweeping robot, comprising a battery interface connected with a power supply, a power switch interface connected in series with the battery interface, and a plurality of load circuit units connected in parallel. Between that power switch interface and each load circuit unit, a self-recoveryfuse is connected in series, which can be changed into a high-resistance state when the current is suddenly increased. One end of each load circuit unit is connected with one end of a self-recovery fuse, and the other end is connected with a common ground; The negative electrode connector of the battery interface is serially connected with a resistor R1 and then connected with a common ground, When a load in a system is overcurrent or short-circuited, As that current is instantaneously increase, the temperature of the self-restoring fuse element is suddenly increased, and the element become ahigh-resistance protection state, so as to achieve the purpose of disconnecting the battery from the load and protecting the battery. Aft the load is overcurrent, the fuse acts and the battery voltage can be output normally, and the load overcurrent does not impinge the battery, thereby achieving the effect of protecting the battery.

Description

[technical field] [0001] The invention relates to the technical field of overcurrent protection circuits, in particular to a system overcurrent protection circuit applied to a control circuit board of a sweeping robot that can effectively protect components from overcurrent. [Background technique] [0002] In recent years, sweeping robot products have been rapidly promoted and applied, not only in terms of structure but also in terms of specific functions. There has been a substantial technological improvement. Because it can automatically clean and collect debris in the house, and has a certain degree of intelligence level, so the prospects for the use of sweeping robots are very prominent. [0003] The internal circuit system of the sweeping robot is a more important part in the actual application process. In systems powered by lithium batteries such as sweeping machines, if the lithium battery is over-discharged, the capacity will decrease, the internal resistance will in...

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Application Information

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IPC IPC(8): H02H7/18H02J7/00
CPCH02H7/18H02J7/00304H02J7/0031
Inventor 唐朝晖
Owner SHENZHEN UMOUSE TECH DEV
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