CN110829526A - Automatic power-off system of charger - Google Patents
Automatic power-off system of charger Download PDFInfo
- Publication number
- CN110829526A CN110829526A CN201911098992.5A CN201911098992A CN110829526A CN 110829526 A CN110829526 A CN 110829526A CN 201911098992 A CN201911098992 A CN 201911098992A CN 110829526 A CN110829526 A CN 110829526A
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- microprocessor
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- electric quantity
- temperature
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- 238000001514 detection method Methods 0.000 claims abstract description 16
- 239000013078 crystal Substances 0.000 claims abstract description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
An automatic power-off system of a charger comprises a temperature detection module, a microprocessor, a reset circuit module, a crystal oscillator circuit module, a relay module and an electric quantity sensor; the reset circuit module and the crystal oscillator circuit module are connected with the microprocessor to form a minimum system of the singlechip; the input end of the microprocessor is respectively and electrically connected with the temperature detection module and the electric quantity sensor, the output end of the microprocessor is electrically connected with the relay module, and a normally open contact in the relay module is connected in series in the charging circuit and used for switching on or off a power supply; the temperature detection module transmits a temperature signal detected in real time to the microprocessor, and the microprocessor controls the relay module to disconnect the charging circuit when the temperature in the charger reaches a set temperature; the electric quantity sensor transmits an electric quantity signal detected in real time to the microprocessor, and the microprocessor controls the relay module to disconnect the charging circuit after the electric quantity value reaches an upper limit value. The invention not only prolongs the service life of the storage battery, but also can better monitor the charging electric quantity in real time.
Description
Technical Field
The invention relates to the field of chargers, in particular to an automatic power-off system of a charger.
Background
The charger can appear damaging in the in-process of using, and calorific capacity is big during charging, need in time distribute away the heat and just can normally work, especially in hot summer, if can not in time dispel the heat, probably can burn out because of overheated electric component to use in the charger to lead to the charger to damage.
The overcharge is that the charging current of the storage battery is larger than the acceptable current of the storage battery, the excessive part is the overcharge, the overcharge mainly generates the side reaction of the electrolyzed water, because the oxygen generated at the anode of the battery transfers to the cathode to generate the oxygen recombination reaction, and the heat can be generated, therefore, the overcharge is actually converted into the heat to increase the temperature of the battery, if not controlled, a great deal of water loss can be caused, and the serious fault such as the capacity reduction of 'thermal runaway', even deformation and the like can be caused.
Therefore, in order to meet the current situation, it is urgently needed to design and produce an automatic power-off system of a charger so as to meet the requirement of practical use.
Disclosure of Invention
In view of the deficiencies of the prior art, the present invention provides an automatic power-off system for a charger, which is used for protecting the charger.
The invention is realized according to the following technical scheme:
an automatic power-off system of a charger comprises a temperature detection module, a microprocessor, a reset circuit module, a crystal oscillator circuit module, a relay module and an electric quantity sensor; the reset circuit module and the crystal oscillator circuit module are connected with the microprocessor to form a minimum system of the singlechip; the input end of the microprocessor is respectively and electrically connected with the temperature detection module and the electric quantity sensor, the output end of the microprocessor is electrically connected with the relay module, and a normally open contact in the relay module is connected in series in the charging circuit and used for switching on or off a power supply; the temperature detection module transmits a temperature signal detected in real time to the microprocessor, and the microprocessor controls the relay module to disconnect the charging circuit when the temperature in the charger reaches a set temperature; the electric quantity sensor transmits an electric quantity signal detected in real time to the microprocessor, and the microprocessor controls the relay module to disconnect the charging circuit after the electric quantity value reaches an upper limit value.
Further, the microprocessor adopts an STC89C51 type single chip microcomputer.
Further, the temperature detection module comprises a temperature sensor, wherein a pin 1 of the temperature sensor is a power signal end, a pin 2 is an output terminal for signal acquisition signals, and a pin 3 is a grounding signal terminal; pin 1 is electrically connected with pin P1.5 of the STC89C51 type singlechip; pin 2 is electrically connected with pin P1.6 of the STC89C51 type single chip microcomputer.
Further, a pin 1 of the electric quantity sensor is a power supply signal end, a pin 2 is an output terminal of a signal acquisition signal, and a pin 3 is a grounding signal terminal; pin 1 is electrically connected with pin P1.0 of the STC89C51 type singlechip; pin 2 is electrically connected with pin P1.1 of the STC89C51 type single chip microcomputer.
Further, the relay module comprises a coil, a normally open contact, a triode Q1 and a resistor R6; an emitting electrode of the triode Q1 is connected with a power supply, a base electrode of the triode Q1 is connected with one end of the resistor R6, the other end of the resistor R6 is connected with a pin P3.4 of the STC89C51 type single chip microcomputer, a collector electrode of the triode Q1 is connected with a coil, and a normally-open contact is connected with the charging circuit in series.
The invention has the beneficial effects that:
the automatic power-off system can prevent the damage of burning the storage battery caused by overcharging, and the charging circuit is disconnected after the temperature in the charger reaches the set temperature, so that the service life of the storage battery is prolonged, and the charging electric quantity can be better monitored in real time.
Drawings
FIG. 1 is a schematic block diagram of an automatic power-off system of the present invention;
fig. 2 is an overall circuit diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1 and 2, an automatic power-off system for a charger includes a temperature detection module 100, a microprocessor 200, a reset circuit module 300, a crystal oscillator circuit module 400, a relay module 500 and a power sensor 600; the reset circuit module 400 and the crystal oscillator circuit module 500 are connected with the microprocessor 200 to form a singlechip minimum system; the input end of the microprocessor 200 is electrically connected with the temperature detection module 100 and the electric quantity sensor 600 respectively, the output end of the microprocessor 200 is electrically connected with the relay module 500, and a normally open contact in the relay module 500 is connected in series in a charging circuit for switching on or off a power supply; the temperature detection module 100 transmits a temperature signal detected in real time to the microprocessor 200, and when the temperature in the charger reaches a set temperature, the microprocessor 200 controls the relay module 500 to disconnect the charging circuit; the electric quantity sensor 600 transmits the electric quantity signal detected in real time to the microprocessor 200, and when the electric quantity value reaches the upper limit value, the microprocessor 200 controls the relay module 500 to disconnect the charging circuit.
Further, the microprocessor 200 adopts an STC89C51 type single chip microcomputer. The STC89C52 chip has the advantages of low power consumption, small size, high integration, high reliability and the like.
Further, the temperature detection module 100 includes a temperature sensor, a pin 1 of the temperature sensor is a power signal terminal, a pin 2 is an output terminal of a signal acquisition signal, and a pin 3 is a ground signal terminal; pin 1 is electrically connected with pin P1.5 of the STC89C51 type singlechip; pin 2 is electrically connected with pin P1.6 of the STC89C51 type single chip microcomputer.
Further, pin 1 of the electric quantity sensor 600 is a power signal terminal, pin 2 is an output terminal of a signal acquisition signal, and pin 3 is a ground signal terminal; pin 1 is electrically connected with pin P1.0 of the STC89C51 type singlechip; pin 2 is electrically connected with pin P1.1 of the STC89C51 type single chip microcomputer.
Further, the relay module 500 includes a coil, a normally open contact, a transistor Q1, and a resistor R6; an emitting electrode of the triode Q1 is connected with a power supply, a base electrode of the triode Q1 is connected with one end of the resistor R6, the other end of the resistor R6 is connected with a pin P3.4 of the STC89C51 type single chip microcomputer, a collector electrode of the triode Q1 is connected with a coil, and a normally-open contact is connected with the charging circuit in series.
The emitter is off when the base of transistor Q1 is high and on when the base is low. When the power supply is connected, the whole circuit is in a working state. When the acquired data reaches the preset maximum value, the pin 3.4 of the STC89C52 chip goes low, and at this time, the transistor Q1 is turned on (equivalent to a wire), and the coil is powered on.
In conclusion, the automatic power-off system can prevent the damage of burning the storage battery caused by overcharging, and the charging circuit is disconnected after the temperature in the charger reaches the set temperature, so that the service life of the storage battery is prolonged, and the charging electric quantity can be better monitored in real time.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (5)
1. The utility model provides a charger auto-power-off system which characterized in that: the temperature detection circuit comprises a temperature detection module (100), a microprocessor (200), a reset circuit module (300), a crystal oscillator circuit module (400), a relay module (500) and an electric quantity sensor (600);
the reset circuit module (400) and the crystal oscillator circuit module (500) are connected with the microprocessor (200) to form a minimum system of the singlechip;
the input end of the microprocessor (200) is respectively and electrically connected with the temperature detection module (100) and the electric quantity sensor (600), the output end of the microprocessor (200) is electrically connected with the relay module (500), and a normally open contact in the relay module (500) is connected in series in the charging circuit and used for switching on or off a power supply;
the temperature detection module (100) transmits a temperature signal detected in real time to the microprocessor (200), and when the temperature in the charger reaches a set temperature, the microprocessor (200) controls the relay module (500) to disconnect the charging circuit;
the electric quantity sensor (600) transmits an electric quantity signal detected in real time to the microprocessor (200), and after the electric quantity value reaches an upper limit value, the microprocessor (200) controls the relay module (500) to disconnect the charging circuit.
2. The automatic power-off system of the charger according to claim 1, characterized in that: the microprocessor (200) adopts an STC89C51 type singlechip.
3. The automatic power-off system of the charger according to claim 1, characterized in that: the temperature detection module (100) comprises a temperature sensor, wherein a pin 1 of the temperature sensor is a power supply signal end, a pin 2 is an output terminal for signal acquisition signals, and a pin 3 is a grounding signal terminal;
pin 1 is electrically connected with pin P1.5 of the STC89C51 type singlechip; pin 2 is electrically connected with pin P1.6 of the STC89C51 type single chip microcomputer.
4. The automatic power-off system of the charger according to claim 1, characterized in that: a pin 1 of the electric quantity sensor (600) is a power supply signal end, a pin 2 is an output terminal of a signal acquisition signal, and a pin 3 is a grounding signal terminal;
pin 1 is electrically connected with pin P1.0 of the STC89C51 type singlechip; pin 2 is electrically connected with pin P1.1 of the STC89C51 type single chip microcomputer.
5. The automatic power-off system of the charger according to claim 1, characterized in that: the relay module (500) comprises a coil, a normally open contact, a triode Q1 and a resistor R6;
an emitting electrode of the triode Q1 is connected with a power supply, a base electrode of the triode Q1 is connected with one end of the resistor R6, the other end of the resistor R6 is connected with a pin P3.4 of the STC89C51 type single chip microcomputer, a collector electrode of the triode Q1 is connected with a coil, and a normally-open contact is connected with the charging circuit in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911098992.5A CN110829526A (en) | 2019-11-12 | 2019-11-12 | Automatic power-off system of charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911098992.5A CN110829526A (en) | 2019-11-12 | 2019-11-12 | Automatic power-off system of charger |
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| Publication Number | Publication Date |
|---|---|
| CN110829526A true CN110829526A (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911098992.5A Pending CN110829526A (en) | 2019-11-12 | 2019-11-12 | Automatic power-off system of charger |
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| CN (1) | CN110829526A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112531846A (en) * | 2020-12-08 | 2021-03-19 | 安徽信息工程学院 | Charger protection monitoring device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108964200A (en) * | 2018-08-07 | 2018-12-07 | 广州市华南畜牧设备有限公司 | A kind of smart charge control system and its charging method |
| CN109256838A (en) * | 2018-10-31 | 2019-01-22 | 徐州恒永电子科技有限公司 | A kind of electric tool charger high temperature power-off control system |
| CN208750601U (en) * | 2018-09-04 | 2019-04-16 | 徐州工程学院 | A kind of prompting lamp system based on photovoltaic power generation |
-
2019
- 2019-11-12 CN CN201911098992.5A patent/CN110829526A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108964200A (en) * | 2018-08-07 | 2018-12-07 | 广州市华南畜牧设备有限公司 | A kind of smart charge control system and its charging method |
| CN208750601U (en) * | 2018-09-04 | 2019-04-16 | 徐州工程学院 | A kind of prompting lamp system based on photovoltaic power generation |
| CN109256838A (en) * | 2018-10-31 | 2019-01-22 | 徐州恒永电子科技有限公司 | A kind of electric tool charger high temperature power-off control system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112531846A (en) * | 2020-12-08 | 2021-03-19 | 安徽信息工程学院 | Charger protection monitoring device |
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Application publication date: 20200221 |