CN211018322U - Charging protection circuit, charging protection device and robot - Google Patents
Charging protection circuit, charging protection device and robot Download PDFInfo
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- CN211018322U CN211018322U CN201922059954.0U CN201922059954U CN211018322U CN 211018322 U CN211018322 U CN 211018322U CN 201922059954 U CN201922059954 U CN 201922059954U CN 211018322 U CN211018322 U CN 211018322U
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Abstract
The utility model belongs to the technical field of the protection of charging, a charging protection circuit is provided, charging protection device and robot, carry out partial pressure through bleeder circuit to the voltage signal of the interface input that charges and handle and generate first partial pressure signal, then adopt voltage comparison circuit to compare first partial pressure signal with predetermine the protection threshold voltage that charges, and according to comparative result output voltage comparison signal, on-off control circuit generates control signal according to voltage comparison signal, charging switch circuit charges the connection state between interface and the battery according to control signal control, thereby it exposes and electrified existence short circuit to have solved the plug-in or the automatic charging mode such as recharging because the interface that charges, there is the hidden danger of electric shock.
Description
Technical Field
The application belongs to the technical field of charging protection, and particularly relates to a charging protection circuit, a charging protection device and a robot.
Background
The large-scale service robot is a new intelligent device, and as a large-scale intelligent device, the input voltage and current are also large. Therefore, the charging mode of the robot in the market at present is a plug-in type or automatic recharging charging mode.
However, in the plug-in type or automatic recharging type charging mode, the charging port is exposed, and the short circuit and electric shock are hidden danger in the charging mode due to electrification.
SUMMERY OF THE UTILITY MODEL
An object of the application is to provide a protection circuit, a protection device and a robot charge, aim at solving plug-in or automatic recharging etc. charge mode because the mouth that charges exposes and electrified the problem that has short circuit, electrocutes hidden danger.
In order to solve the above problem, the present application provides a charging protection circuit, which is connected to a charging interface and a battery respectively, and includes:
the voltage dividing circuit is connected with the charging interface and used for receiving a voltage signal input by the charging interface and carrying out voltage division processing on the voltage signal to generate a first voltage division signal;
the voltage comparison circuit is connected with the voltage division circuit and used for receiving the first voltage division signal, comparing the first voltage division signal with a preset charging protection threshold voltage and outputting a voltage comparison signal according to a comparison result;
the switch control circuit is connected with the voltage comparison circuit and the charging interface and used for receiving the voltage comparison signal and outputting a control signal according to the voltage comparison signal; and
and the charging switch circuit is respectively connected with the charging interface, the battery and the switch control circuit, and is used for receiving the control signal and controlling the connection state between the charging interface and the battery according to the control signal.
Optionally, the charging protection circuit further includes:
the first switch circuit is connected with the voltage comparison circuit and used for receiving the voltage comparison signal and generating a first switch control signal according to the voltage comparison signal;
the second switch circuit is respectively connected with the first switch circuit and the charging interface and is used for receiving the first switch control signal and generating a control signal according to the first switch control signal; and
and the optical coupler circuit is respectively connected with the first switch circuit and the second switch circuit and is used for electrically isolating signal transmission between the first switch circuit and the second switch circuit.
Optionally, the charging protection circuit further includes:
and the rectifying circuit is respectively connected with the charging switch circuit and the battery and is used for rectifying the voltage signal provided by the charging interface.
Optionally, the charging protection circuit further includes:
and the surge protection circuit is connected with the charging interface and is used for performing overvoltage and overcurrent protection on a voltage signal provided by the charging interface.
Optionally, the charging switch circuit includes:
the filtering unit is connected with the charging interface and is used for filtering the voltage signal provided by the charging interface;
the plurality of switch units are connected with the charging interface and used for receiving the control signal and controlling the connection state between the charging interface and the battery according to the control signal;
the control ends of the switch units are connected to the switch control circuit in common, and the current input ends of the switch units are connected to the charging interface in common.
Optionally, the rectifier circuit includes:
a plurality of rectifying units for rectifying the voltage signals output by the plurality of switching units; the plurality of rectifying units are connected with the plurality of switch units in a one-to-one correspondence mode, and the plurality of rectifying units are connected to the battery in a shared mode.
Optionally, each switch unit is formed by a switch tube, a current input end of the switch tube is connected to the charging interface, a current output end of the switch tube is connected to the rectifying circuit, and a control end of the switch tube is connected to the switch control circuit.
Optionally, the switching tube is a P-type MOS tube, a gate of the P-type MOS tube is used as a control end of the switching tube, a drain of the P-type MOS tube is used as a current output end of the switching tube, and a source of the P-type MOS tube is used as a current input end of the switching tube.
The embodiment of the present application further provides a charging protection device, including:
a charging interface;
a battery; and
the charging protection circuit according to any one of the preceding claims, wherein the charging protection circuit is connected to the charging interface and the battery, respectively.
The embodiment of the application also provides a robot, which comprises the charging protection circuit.
The application provides a charging protection circuit, charging protection device and robot, carry out partial pressure through bleeder circuit to the voltage signal of the interface input that charges and generate first partial pressure signal, then adopt voltage comparison circuit to carry out the comparison with the protection threshold voltage of predetermineeing with first partial pressure signal, and according to the comparative result output voltage comparative signal, on-off control circuit generates control signal according to voltage comparative signal, charging switch circuit controls the connection state between interface and the battery that charges according to control signal, thereby the plug-in or automatic charging mode such as recharging because the interface that charges exposes and electrified existence short circuit, the hidden danger of electrocuteeing has been solved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a block diagram of a charge protection circuit according to an embodiment of the present application.
Fig. 2 is a block diagram of a charge protection circuit according to another embodiment of the present application.
Fig. 3 is a block diagram of a charge protection circuit according to another embodiment of the present application.
Fig. 4 is a block diagram of a charge protection circuit according to another embodiment of the present application.
Fig. 5 is a schematic circuit structure diagram of a charge protection circuit according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly or indirectly secured to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positions based on the orientations or positions shown in the drawings, and are for convenience of description only and not to be construed as limiting the technical solution. The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.
In order to explain the technical solutions of the present application, the following detailed descriptions are made with reference to specific drawings and examples.
The present application will now be described in detail with reference to the drawings and specific examples.
The embodiment of the present application provides a charging protection circuit, and as shown in fig. 1, the charging protection circuit in the embodiment is respectively connected to a charging interface 10 and a battery 20. The charge protection circuit includes: a voltage dividing circuit 30, a voltage comparing circuit 40, a switch control circuit 110, and a charge switch circuit 70; the voltage dividing circuit 30 is connected with the charging interface 10, and is used for acquiring a voltage signal input by the charging interface 10 and outputting a first voltage dividing signal; the voltage comparison circuit 40 is connected to the voltage division circuit 30, and configured to receive the first voltage division signal, compare the first voltage division signal with a preset charging protection threshold voltage, and output a voltage comparison signal according to a comparison result; the switch control circuit 110 is connected to the voltage comparison circuit 40, and is configured to receive the voltage comparison signal and generate a control signal according to the voltage comparison signal; the charging switch circuit 70 is respectively connected to the charging interface 10, the battery 20 and the switch control circuit 110, and is configured to receive the control signal and control a connection state between the charging interface 10 and the battery 20 according to the control signal.
In this embodiment, the voltage divider circuit 30 collects the voltage at the charging interface, the voltage comparator circuit 40 compares the voltage collection signal with a preset charging protection threshold voltage, and outputs a voltage comparison signal according to the comparison result, for example, if the voltage collection signal is smaller than the preset charging protection threshold, a corresponding first voltage comparison signal is generated, the first voltage comparison signal enables the switch control circuit 110 to be turned on, at this time, the charging interface 10 is grounded, and the charging switch circuit 70 is turned off, so that the voltage signal input by the charging interface 10 is prevented from charging the battery 20 in an overvoltage state, which may damage the battery 20; if the voltage collecting signal is within the safe voltage range, a corresponding second voltage comparing signal is generated, the second voltage comparing signal turns off the switch control circuit 110, at this time, the charging switch circuit 70 is turned on, and the charging interface 10 charges the battery 20 normally.
In one embodiment, the voltage comparing circuit 30 may be a voltage comparator, and two input terminals of the voltage comparator are respectively connected to the preset charging protection threshold voltage source and the output terminal of the voltage dividing circuit 30.
Further, the voltage comparison circuit 30 compares the first voltage division signal with a first voltage threshold, where the first voltage threshold is smaller than a preset charging protection threshold, and if the first voltage division signal is smaller than the first voltage threshold, the voltage comparison circuit 30 outputs the first voltage comparison signal as well, so that the charging switch circuit 70 is turned off, and thus the battery 20 at the rear end of the charging switch circuit 70 is isolated from the external environment when the voltage of the charging interface 10 is low or in a non-charging state, and the potential safety hazard problem caused by misoperation of the charging interface 10 due to exposure of the interface of the battery 20 to a conductor and a child is avoided in the daily use process.
In one embodiment, referring to fig. 2, the switch control circuit 110 includes a first switch circuit 50, a second switch circuit 60, and an optical coupler circuit 80; the first switch circuit 50 receives the voltage comparison signal and generates a first switch control signal according to the voltage comparison signal, the second switch circuit 60 is respectively connected with the first switch circuit 50 and the charging interface 10 and is used for receiving the first switch control signal and generating a control signal according to the first switch control signal, and the optical coupler circuit 80 is respectively connected with the first switch circuit 50 and the second switch circuit 60 and is used for electrically isolating signal transmission between the first switch circuit 50 and the second switch circuit 60.
In this embodiment, the optical coupler circuit 80 is used to electrically isolate the first switch circuit 50 from the second switch circuit 60, and the optical coupler circuit 80 may be an optical coupler, so that the signal abnormality in the second switch circuit 60 is prevented from affecting the first switch circuit 50 by unidirectional transmission signals.
In one embodiment, referring to fig. 3, the charging protection circuit further includes a rectifying circuit 90, and the rectifying circuit 90 is respectively connected to the charging switch circuit 70 and the battery 20, and is configured to rectify the voltage signal provided by the charging interface 10.
In this embodiment, the rectifying circuit 90 can further rectify the voltage signal input by the charging switch circuit 70, so as to prevent the ac signal in the voltage signal from damaging the battery 20.
In one embodiment, referring to fig. 4, the charging protection circuit further includes a surge protection circuit 101, where the surge protection circuit 101 is connected to the charging interface 10, and is configured to perform overvoltage and overcurrent protection on a voltage signal provided by the charging interface 10.
In this embodiment, the surge protection circuit 101 can eliminate static electricity generated in the charging interface 10 and the charging protection circuit, and pulse current and transient high voltage caused at the moment when the charging interface 10 is connected to the charging power supply.
In one embodiment, referring to fig. 5, the charging switch circuit includes a filtering unit 71, a plurality of the switching units 72; the filtering unit 71 is connected to the charging interface 10, and is configured to perform filtering processing on a voltage signal provided by the charging interface 10; the plurality of switch units 72 are connected with the charging interface 10, and are configured to receive the control signal and control a connection state between the charging interface 10 and the battery 20 according to the control signal; the control terminals of the switch units 72 are commonly connected to the switch control circuit 110, and the current input terminals of the switch units 72 are commonly connected to the charging interface 10.
In this embodiment, the voltage signal provided by the charging interface 10 is filtered by the filtering unit, and then the connection state between the charging interface 10 and the battery 20 is controlled by the plurality of switch units 72 connected in parallel, so as to avoid the failure of the charging protection circuit caused by the fault of a single switch unit.
In one embodiment, the rectifying circuit includes a plurality of rectifying units for rectifying the voltage signals output by the plurality of switching units 72; the plurality of rectifying units are connected to the plurality of switching units 72 in a one-to-one correspondence, and the plurality of rectifying units are connected to the battery 20 in common.
In the present embodiment, each switch unit 72 corresponds to a rectifying unit, and the plurality of rectifying units may have the same structure, and each rectifying unit rectifies the voltage signal output by the corresponding switch unit 72 and outputs the rectified voltage signal to the battery 20.
In one embodiment, each switch unit 72 is formed by a switch tube, a current input end of the switch tube is connected to the charging interface 10, a current output end of the switch tube is connected to the rectifying circuit 90, and a control end of the switch tube is connected to the switch control circuit 110.
In the present embodiment, each of the switch units 72 is formed by a switch tube, the control terminals of the switch tubes are commonly connected to the output terminal of the second switch circuit 60, and the conduction states of the switch tubes are controlled by the control signal output by the second switch circuit 60, for example, if the control signal is at a low level, the switch tubes are simultaneously conducted, so as to conduct the charging interface 10 and the battery 20.
In one embodiment, the switch tube is a P-type MOS tube, a gate of the P-type MOS tube serves as a control end of the switch tube, a drain of the P-type MOS tube serves as a current output end of the switch tube, and a source of the P-type MOS tube serves as a current input end of the switch tube.
In one embodiment, referring to fig. 5, the charging switch circuit 70 includes two switch units 72 consisting of a third switch transistor Q3 and a fourth switch transistor Q4, and the control terminals of the third switch transistor Q3 and the fourth switch transistor Q4 are commonly connected to the second switch circuit 60.
In one embodiment, the third switch Q3 and the fourth switch Q4 are both P-type MOS transistors, and if the control signal is at low level, the third switch Q3 and the fourth switch Q4 are turned on simultaneously, so as to turn on the charging interface 10 and the battery 20.
In one embodiment, referring to fig. 5, the filtering unit 71 includes a second capacitor C2 and a ninth resistor R9, a first terminal of the second capacitor C2 and a first terminal of the ninth resistor R9 are commonly connected to the charging interface 10, and a second terminal of the second capacitor C2 and a second terminal of the ninth resistor R9 are commonly connected to the second switch circuit 60.
In one embodiment, referring to fig. 5, the rectifying circuit 90 includes a first diode D1 and a second diode D2, an anode of the first diode D1 is connected to the current output terminal of the fourth switching tube Q4, an anode of the second diode D2 is connected to the current output terminal of the third switching tube Q3, and cathodes of the first diode D1 and the second diode D2 are connected to the battery 20 in common.
In one embodiment, referring to fig. 5, the second switch circuit 60 includes a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a first capacitor C1, an eighth resistor R8, and a second switch tube Q2; the first end of the fifth resistor R5 is connected to the charging interface 10, the first end of the sixth resistor R6 is connected to the second end of the fifth resistor R5, the second end of the sixth resistor R6, the first end of the seventh resistor R7, the first end of the first capacitor C1, and the control end of the second switch Q2 are connected in common, the second end of the seventh resistor R7, the second end of the first capacitor C1, and the current output end of the second switch Q2 are connected to ground in common, the current input end of the second switch Q2 is connected to the first end of the eighth resistor R8, and the second end of the eighth resistor R8 is connected to the charging switch circuit 70.
In this embodiment, the fifth resistor R5, the sixth resistor R6 and the seventh resistor R7 may form a voltage dividing circuit, when the voltage signal of the charging interface 10 is in an overvoltage state, the first switch circuit 50 is in an on state, the second end of the fifth resistor R5 is directly grounded, so that the charging interface 10 is grounded, the second switch Q2 is turned off, and the charging switch circuit 70 is turned off, so as to prevent the voltage signal of the charging interface 10 from damaging the battery 20. When the voltage of the voltage signal of the charging interface 10 is within the safe voltage range, the first switch circuit 50 is in an off state, at this time, due to the existence of the first capacitor C1, the voltage of the control end of the second switch tube Q2 gradually rises, and when the voltage of the control end rises to the device on threshold voltage, the second switch tube Q2 is turned on, the control end of the charging switch circuit 70 is grounded, and the charging switch circuit 70 is turned on, so that the charging interface 10 is connected with the battery 20.
In one embodiment, referring to fig. 5, the optocoupler circuit 80 includes a first voltage source VCC, a tenth resistor R10, and an optocoupler chip IC 1; the first end of tenth resistance R10 is connected with first voltage source VCC, and the second end of tenth resistance R10 is connected with opto-coupler chip IC 1's first input end, and opto-coupler chip IC 1's second input end is connected with first switch circuit 50, and opto-coupler chip IC 1's first output end is connected with second switch circuit 60, and opto-coupler chip IC 1's second output end ground connection.
In one embodiment, referring to fig. 5, the first switch circuit 50 includes a third resistor R3, a fourth resistor R4, and a first switch Q1; the first end of the third resistor R3 is connected with the voltage comparison circuit 40, the second end of the third resistor R3, the first end of the fourth resistor R4 and the control end of the first switch tube Q1 are connected in common, the second end of the fourth resistor R4 and the current output end of the first switch tube Q1 are connected in common, and the current input end of the first switch tube Q1 is connected with the optical coupler circuit 80.
In one embodiment, the first switch Q1 and the second switch Q2 are both NPN transistors.
In one embodiment, referring to fig. 5, the voltage divider circuit 30 includes a first resistor R1 and a second resistor R2; the first end of the first resistor R1 is connected to the charging interface 10, the second end of the first resistor R1 and the first end of the second resistor R2 are commonly connected to the voltage comparison circuit 40, and the second end of the second resistor R2 is grounded.
In one embodiment, referring to fig. 5, the surge protection circuit 101 is composed of an anti-static chip ESD, a first terminal of the anti-static chip ESD is connected to the charging interface 10, and a second terminal of the anti-static chip ESD is grounded.
In one embodiment, the ESD model of the anti-static chip is ESD48A150 TA.
The embodiment of the present application further provides a charging protection device, including: a charging interface; a battery; and the charging protection circuit is connected with the charging interface and the battery respectively.
The embodiment of the application also provides a robot, which comprises the charging protection circuit.
In this embodiment, by providing the charging protection circuit according to any one of the above embodiments on the robot, when the robot is not charged, the charging interface 10 does not output a voltage signal, and when the charger is abnormal, the charging protection circuit directly cuts off the power supply to protect the rear-end device from being normal, thereby avoiding the potential safety hazard problem of the rear-end device when the charger is abnormal.
The application provides a charging protection circuit, charging protection device and robot, carry out partial pressure through bleeder circuit to the voltage signal of the interface input that charges and generate first partial pressure signal, then adopt voltage comparison circuit to carry out the comparison with the protection threshold voltage of predetermineeing with first partial pressure signal, and according to the comparative result output voltage comparative signal, on-off control circuit generates control signal according to voltage comparative signal, charging switch circuit controls the connection state between interface and the battery that charges according to control signal, thereby the plug-in or automatic charging mode such as recharging because the interface that charges exposes and electrified existence short circuit, the hidden danger of electrocuteeing has been solved.
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.
Claims (10)
1. The utility model provides a protection circuit charges, is connected with interface and battery that charges respectively which characterized in that includes:
the voltage dividing circuit is connected with the charging interface and used for receiving a voltage signal input by the charging interface and carrying out voltage division processing on the voltage signal to generate a first voltage division signal;
the voltage comparison circuit is connected with the voltage division circuit and used for receiving the first voltage division signal, comparing the first voltage division signal with a preset charging protection threshold voltage and outputting a voltage comparison signal according to a comparison result;
the switch control circuit is connected with the voltage comparison circuit and the charging interface and used for receiving the voltage comparison signal and outputting a control signal according to the voltage comparison signal; and
and the charging switch circuit is respectively connected with the charging interface, the battery and the switch control circuit, and is used for receiving the control signal and controlling the connection state between the charging interface and the battery according to the control signal.
2. The charge protection circuit of claim 1, further comprising:
the first switch circuit is connected with the voltage comparison circuit and used for receiving the voltage comparison signal and generating a first switch control signal according to the voltage comparison signal;
the second switch circuit is respectively connected with the first switch circuit and the charging interface and is used for receiving the first switch control signal and generating a control signal according to the first switch control signal;
and the optical coupler circuit is respectively connected with the first switch circuit and the second switch circuit and is used for electrically isolating signal transmission between the first switch circuit and the second switch circuit.
3. The charge protection circuit of claim 1, further comprising:
and the rectifying circuit is respectively connected with the charging switch circuit and the battery and is used for rectifying the voltage signal provided by the charging interface.
4. The charge protection circuit of claim 1, further comprising:
and the surge protection circuit is connected with the charging interface and is used for performing overvoltage and overcurrent protection on a voltage signal provided by the charging interface.
5. The charge protection circuit of claim 3, wherein the charge switch circuit comprises:
the filtering unit is connected with the charging interface and is used for filtering the voltage signal provided by the charging interface;
the plurality of switch units are connected with the charging interface and used for receiving the control signal and controlling the connection state between the charging interface and the battery according to the control signal;
the control ends of the switch units are connected to the switch control circuit in common, and the current input ends of the switch units are connected to the charging interface in common.
6. The charge protection circuit according to claim 5, wherein the rectifying circuit comprises:
a plurality of rectifying units for rectifying the voltage signals output by the plurality of switching units; the plurality of rectifying units are connected with the plurality of switch units in a one-to-one correspondence mode, and the plurality of rectifying units are connected to the battery in a shared mode.
7. The charging protection circuit of claim 5, wherein each switch unit is formed by a switch tube, a current input end of the switch tube is connected to the charging interface, a current output end of the switch tube is connected to the rectifying circuit, and a control end of the switch tube is connected to the switch control circuit.
8. The charging protection circuit of claim 7, wherein the switching transistor is a P-type MOS transistor, a gate of the P-type MOS transistor serves as a control terminal of the switching transistor, a drain of the P-type MOS transistor serves as a current output terminal of the switching transistor, and a source of the P-type MOS transistor serves as a current input terminal of the switching transistor.
9. A charge protection device, comprising:
a charging interface;
a battery; and
the charge protection circuit of any one of claims 1-8, connected to the charging interface and the battery, respectively.
10. A robot, characterized in that the robot comprises a charge protection circuit according to any of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922059954.0U CN211018322U (en) | 2019-11-22 | 2019-11-22 | Charging protection circuit, charging protection device and robot |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922059954.0U CN211018322U (en) | 2019-11-22 | 2019-11-22 | Charging protection circuit, charging protection device and robot |
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| CN211018322U true CN211018322U (en) | 2020-07-14 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113890148A (en) * | 2021-09-30 | 2022-01-04 | 中天宽带技术有限公司 | Battery short-circuit protection circuit and battery charging and discharging circuit |
| WO2022057219A1 (en) * | 2020-09-18 | 2022-03-24 | 无锡翼盟电子科技有限公司 | High voltage breakdown prevention circuit for printing device consumable chip |
-
2019
- 2019-11-22 CN CN201922059954.0U patent/CN211018322U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022057219A1 (en) * | 2020-09-18 | 2022-03-24 | 无锡翼盟电子科技有限公司 | High voltage breakdown prevention circuit for printing device consumable chip |
| CN113890148A (en) * | 2021-09-30 | 2022-01-04 | 中天宽带技术有限公司 | Battery short-circuit protection circuit and battery charging and discharging circuit |
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