CN210201523U - Charging device with automatic power-off and abnormal reminding functions - Google Patents
Charging device with automatic power-off and abnormal reminding functions Download PDFInfo
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- CN210201523U CN210201523U CN201921309498.4U CN201921309498U CN210201523U CN 210201523 U CN210201523 U CN 210201523U CN 201921309498 U CN201921309498 U CN 201921309498U CN 210201523 U CN210201523 U CN 210201523U
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Abstract
The utility model discloses a charging device with automatic outage and unusual warning, it includes control module, current sensor, first voltage comparator, second voltage comparator, automatic outage module, reputation warning module, charging circuit and power module, the input of current sensor is connected the charging circuit in order to detect the current value and turn into voltage signal with the current value, the output of current sensor connects the input of first voltage comparator and second voltage comparator respectively; the first voltage comparator is used for detecting whether the current value is overcurrent or not, and the second voltage comparator is used for detecting whether the current value is zero or not; the output ends of the first voltage comparator and the second voltage comparator are respectively connected with the input end of the control module, and the output end of the control module is respectively connected with the input ends of the automatic power-off module and the acousto-optic reminding module. The utility model has the advantages of automatic power-off and full power-off when charging is abnormal.
Description
Technical Field
The utility model relates to a charging device with auto-power-off and unusual warning.
Background
The conventional charger often cannot perform power-off treatment when charging is abnormal, and in addition, the problem of battery overcharge easily caused by the fact that the battery cannot be automatically powered off when being fully charged is solved; the spontaneous combustion caused by the overcharge of the battery or the short circuit of the charging loop can cause fire, great economic loss is generated, even the safety of the public is seriously threatened, and the problem of how to put an end to the hidden trouble of abnormal charging and overcharge of the battery is a big problem.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide a charging device with automatic outage and unusual warning.
The utility model provides a technical scheme that its technical problem adopted is:
a charging device with automatic power-off and abnormity reminding functions comprises a control module, a current sensor, a first voltage comparator, a second voltage comparator, an automatic power-off module, an acousto-optic reminding module, a charging circuit and a power module, wherein the input end of the current sensor is connected with the charging circuit to collect a current value and convert the current value into a voltage signal, and the output end of the current sensor is respectively connected with the input ends of the first voltage comparator and the second voltage comparator to send the voltage signal; the first voltage comparator is used for detecting whether the current value is overcurrent or not, and the second voltage comparator is used for detecting whether the current value is zero or not; the output ends of the first voltage comparator and the second voltage comparator are respectively connected with the input end of the control module, and the output end of the control module is respectively connected with the input ends of the automatic power-off module and the acousto-optic reminding module; when the current value is over-current or zero, the control module controls the automatic power-off module to cut off the charging circuit; when the current value is over-current, the control module controls the sound and light reminding module to prompt that the current is abnormal; when the current value is zero, the control module controls the acousto-optic reminding module to prompt that charging is finished; and the power supply module is connected with each module for supplying power.
In another preferred embodiment, the current sensor is a hall sensor.
In another preferred embodiment, the auto-power-off module includes a relay, and the control module drives the relay through a transistor.
In another preferred embodiment, the sound and light reminding module comprises a buzzer, a red LED lamp bead and a green LED lamp bead, the buzzer is used for giving out sound warning, and the red LED lamp bead and the green LED lamp bead are used for indicating the charging state.
The utility model has the advantages that:
1. collecting a current value through a current sensor, and judging whether the current is over-current or not and judging whether the current is zero or not by a first voltage comparator and a second voltage comparator according to the magnitude of the current value; the automatic power-off module disconnects the charging circuit according to the judgment result to realize automatic power-off; and the acousto-optic reminding module indicates the charging state according to the judgment result.
2. And collecting a current value by using a Hall sensor, and converting the current value into a voltage signal for processing and analysis by a control module.
3. The on-off of the charging circuit is controlled by the relay.
4. The LED lamp is used for giving out sound warning by arranging the buzzer and indicating the charging state by arranging the red LED lamp beads and the green LED lamp beads.
The present invention will be described in further detail with reference to the accompanying drawings and examples; however, the charging device with automatic power-off and abnormal reminding of the present invention is not limited to the embodiment.
Drawings
Fig. 1 is a system block diagram of a preferred embodiment of the present invention.
Detailed Description
In the embodiment, referring to fig. 1, a charging device with automatic power off and abnormal alert function of the present invention includes a control module 5, a current sensor 2, a first voltage comparator 3, a second voltage comparator 4, an automatic power off module 6, an audible and visual alert module 7, a charging circuit and a power module 1, wherein the power module 1 is connected to each module for supplying power, the input terminal of the current sensor 2 is connected to the charging circuit for collecting a current value and converting the current value into a voltage signal, the output terminal of the current sensor 2 is connected to the input terminals of the first voltage comparator 3 and the second voltage comparator 4 for sending the voltage signal, the current sensor 2 employs a hall sensor chip with a chip model of ACS712, which detects current based on hall principle and converts the detection result into a voltage output, the output voltage of the chip is Vout＝2.5+ (2/30)IpIn which IpFor the value of the current monitored, VoutIs the corresponding output voltage.
In this embodiment, the LM324 chip is used to construct the first voltage comparator 3 and the first voltage comparator 4, the first voltage comparator 3 is used to detect whether the current value is over-current, and according to the current-voltage relationship of the ACS712 chip, when the charging circuit is in short circuit abnormality, the output voltage of the ACS712 chip will be higher than 4.5V. Setting the reference voltage of the non-inverting terminal of the first voltage comparator 3 to 4.5V, when the output voltage of the ACS712 chip is higher than 4.5V, judging that the circuit is short-circuited, and outputting a low level by the first voltage comparator 3 for the control module 5 to analyze and process; the second voltage comparator 4 is used for detecting whether the current value is zero or not, and according to the current-voltage relationship of the ACS712 chip, when no current exists in the charging circuit, V isoutSetting the reference voltage at the inverting terminal of the second voltage comparator 4 to be slightly higher than 2.5V, when the charging circuit is fully charged, the charging circuit current approaches 0, and at this time, the second voltage is setThe output of the comparator 4 is low level for the control module 5 to analyze;
the output ends of the first voltage comparator 3 and the second voltage comparator 4 are respectively connected with the input end of the control module 5, and the output end of the control module 5 is respectively connected with the input ends of the automatic power-off module 6 and the acousto-optic reminding module 7; the automatic power-off module 6 comprises a relay, the control module 5 is driven by a triode, the acousto-optic reminding module 7 comprises a buzzer 10, a red LED lamp bead 9 and a green LED lamp bead 8, the buzzer 10 is used for giving out sound warning, and the red LED lamp bead 9 and the green LED lamp bead 8 are used for indicating the charging state.
The control module 5 adopts an STC89C51 single chip microcomputer, when the current value is overcurrent, the first voltage comparator 3 outputs a low level, the second voltage comparator 4 outputs a high level, and after the control module 5 respectively reads the low level and the high level, the automatic power-off module 6 is controlled to cut off the charging circuit, and meanwhile, the buzzer 10 of the acousto-optic reminding module 7 is controlled to make a sound to remind that the current of the charging device is too large, and a short circuit possibly exists.
When the current value is zero, the first voltage comparator 3 outputs a high level, the second voltage comparator 4 outputs a low level, the control module 5 controls the automatic power-off module 6 to cut off the charging circuit after reading the high level and the low level respectively, and simultaneously controls the green LED lamp bead 8 of the acousto-optic reminding module 7 to light up to indicate that the battery is fully charged.
When the charging device is in a normal charging process, the first voltage comparator 3 and the second voltage comparator 4 both output high levels, the control module 5 does not operate the automatic power-off module 6 after reading the high levels and the high levels respectively, and meanwhile the control module 5 controls the red LED lamp beads 9 of the acousto-optic reminding module 7 to light up to show that the charging device is in the charging process.
The decision logic of the control module 5 is shown in table 1:
TABLE 1 discrimination logic for control modules
The above-mentioned embodiment is only used for further explaining the utility model discloses a charging device with automatic outage and unusual warning, nevertheless the utility model discloses do not confine the embodiment to, all be according to the utility model discloses a technical entity all falls into the technical scheme's of the utility model the protection within range to any simple modification, the equivalent change and the decoration of making to above embodiment.
Claims (4)
1. The utility model provides a charging device with automatic outage and unusual warning which characterized in that: the intelligent charging system comprises a control module, a current sensor, a first voltage comparator, a second voltage comparator, an automatic power-off module, an acousto-optic reminding module, a charging circuit and a power module, wherein the input end of the current sensor is connected with the charging circuit to acquire a current value and convert the current value into a voltage signal, and the output end of the current sensor is respectively connected with the input ends of the first voltage comparator and the second voltage comparator to send the voltage signal; the first voltage comparator is used for detecting whether the current value is overcurrent or not, and the second voltage comparator is used for detecting whether the current value is zero or not; the output ends of the first voltage comparator and the second voltage comparator are respectively connected with the input end of the control module, and the output end of the control module is respectively connected with the input ends of the automatic power-off module and the acousto-optic reminding module; when the current value is over-current or zero, the control module controls the automatic power-off module to cut off the charging circuit; when the current value is over-current, the control module controls the sound and light reminding module to prompt that the current is abnormal; when the current value is zero, the control module controls the acousto-optic reminding module to prompt that charging is finished; and the power supply module is connected with each module for supplying power.
2. The charging device with automatic power-off and abnormity reminding functions as claimed in claim 1, wherein: the current sensor is a hall sensor.
3. The charging device with automatic power-off and abnormity reminding functions as claimed in claim 1, wherein: the automatic power-off module comprises a relay, and the control module drives the relay through a triode.
4. The charging device with automatic power-off and abnormity reminding functions as claimed in claim 1, wherein: the acousto-optic reminding module comprises a buzzer, a red LED lamp bead and a green LED lamp bead, the buzzer is used for giving out sound warning, and the red LED lamp bead and the green LED lamp bead are used for indicating the charging state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921309498.4U CN210201523U (en) | 2019-08-13 | 2019-08-13 | Charging device with automatic power-off and abnormal reminding functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921309498.4U CN210201523U (en) | 2019-08-13 | 2019-08-13 | Charging device with automatic power-off and abnormal reminding functions |
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| Publication Number | Publication Date |
|---|---|
| CN210201523U true CN210201523U (en) | 2020-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921309498.4U Expired - Fee Related CN210201523U (en) | 2019-08-13 | 2019-08-13 | Charging device with automatic power-off and abnormal reminding functions |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111746316A (en) * | 2020-07-13 | 2020-10-09 | 徐州久胜电子科技有限公司 | Automatic power-off charger for electric vehicle |
-
2019
- 2019-08-13 CN CN201921309498.4U patent/CN210201523U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111746316A (en) * | 2020-07-13 | 2020-10-09 | 徐州久胜电子科技有限公司 | Automatic power-off charger for electric vehicle |
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Granted publication date: 20200327 Termination date: 20200813 |