CN110661313B - Window voltage control storage battery discharge protection circuit based on discrete component - Google Patents
Window voltage control storage battery discharge protection circuit based on discrete component Download PDFInfo
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- CN110661313B CN110661313B CN201910915114.1A CN201910915114A CN110661313B CN 110661313 B CN110661313 B CN 110661313B CN 201910915114 A CN201910915114 A CN 201910915114A CN 110661313 B CN110661313 B CN 110661313B
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- input port
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- 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
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
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- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention provides a window voltage control storage battery discharging protection circuit based on discrete components, which comprises a first input port, a second input port, an opening unit, a closing unit and a control unit, wherein the control unit is an MOS (metal oxide semiconductor) tube, the first input port and the second input port are connected in parallel and then connected with the grid electrode of the MOS tube, the first input port and the second input port are connected in parallel and then connected with the source electrode of the MOS tube, the opening unit comprises a first triode, a first voltage stabilizing tube used for setting an upper threshold voltage value, a first resistor and a second resistor, and the closing unit comprises a second triode, a second voltage stabilizing tube used for setting a lower threshold voltage value and a third resistor.
Description
Technical Field
The invention relates to the technical field of battery protection, in particular to a window voltage control storage battery discharge protection circuit based on discrete components.
Background
The intelligent community monitoring equipment needs to be started by externally connecting 15V of mains supply, a 12V storage battery is configured in the system, and when the externally connected mains supply is powered off, the storage battery can immediately take over to supply power. The voltage of the storage battery continuously drops in the discharging process, particularly the voltage drops sharply when the high current is discharged, and the voltage of the storage battery automatically rises when the storage battery stops discharging, and the rising voltage is related to the charge of the battery. After the battery is disconnected and discharged under certain conditions, the voltage is raised to the size before discharging, but the battery electric quantity is very low at the moment, and the service life of the battery is seriously damaged by repeated discharging. For this purpose, a control circuit with a voltage higher than 15V and lower than 12V is needed, and no corresponding control chip or simple circuit is found by looking up the related data. The existing method utilizes a microcontroller or a PLC to control the switching and the time sequence of power on and power off through a program, thus causing inconvenience and burden to rapid development, increasing the complexity and increasing the cost, and independently maintaining a set of program for switching the power supply time sequence.
Disclosure of Invention
It is necessary to propose a discrete component based window voltage controlled battery discharge protection circuit.
The utility model provides a window voltage control battery discharge protection circuit based on discrete component, includes first input port, second input port, opening unit, turn-off unit, the control unit, and the control unit is the MOS pipe, and the first input port, the second input port is connected in parallel with the grid of MOS pipe after, and first input port, the second input port is connected in parallel with the source electrode of MOS pipe still, and the drain electrode of MOS pipe connects output port to be connected with power supply unit, opening unit includes first triode, is used for setting up threshold voltage value's first stabilizator, first resistance, second resistance, and the base of first triode is established ties with first stabilizator, and the collector of first triode is established ties with the second resistance, and the second resistance is established ties with first resistance after establishing ties with the grid of MOS pipe, and the base of first resistance, first triode still is established ties with first input port, second input port, turn-off unit includes the second triode, is used for setting up threshold voltage value's second stabilizator, third MOS pipe, the base of second triode and second stabilizator are established ties with the second stabilizator, the base of third triode and the second stabilizator are established ties with the drain electrode of third triode, and the base of third triode is established ties with the drain electrode after establishing ties with the third transistor.
Preferably, a backflow preventing diode is connected in series with the first input port, and a backflow preventing diode is connected in series with the second input port.
Preferably, a voltage stabilizing tube is connected in series between the grid electrode and the negative electrode of the MOS tube as a protection loop.
Preferably, a diode and a capacitor are connected in parallel between the source electrode and the drain electrode of the MOS tube.
In the circuit, a control circuit can be built by only some commonly used discrete components, the threshold control can be realized without programming, the threshold can be adjusted, and only the first voltage stabilizing tube and the second voltage stabilizing tube are required to be replaced, so that the circuit is suitable for different scene requirements, low in cost, high in development speed and free of maintenance programs.
Drawings
Fig. 1 is a circuit diagram of the present invention.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Referring to fig. 1, the embodiment of the invention provides a window voltage control storage battery discharge protection circuit based on discrete components, which comprises a first input port, a second input port, an opening unit, a shut-off unit and a control unit, wherein the control unit is a MOS (metal oxide semiconductor) tube, the first input port and the second input port are connected in parallel and then are connected with a grid electrode of the MOS tube, the first input port and the second input port are connected in parallel and then are also connected with a source electrode of the MOS tube, a drain electrode of the MOS tube is connected with an output port so as to be connected with power supply equipment, the opening unit comprises a first triode, a first voltage stabilizer for setting an upper threshold voltage value, a first resistor and a second resistor, a base electrode of the first triode is connected with the first voltage stabilizer in series, a collector electrode of the first triode is connected with the second resistor in series, a base electrode of the second triode is connected with the first resistor in series, a base electrode of the first resistor is connected with the second triode in series, a base electrode of the second triode is connected with the second resistor in series, and a drain electrode of the second triode is connected with the second resistor in series.
In the invention, when two inputs exist simultaneously, the input with high voltage supplies power for the subsequent equipment. The starting unit judges the starting voltage, the threshold is set by using the voltage stabilizing value of the first voltage stabilizing diode D4, and the grid voltage of the Q1 is controlled through the switching action of the first triode Q2. The turn-off unit realizes the judgment of the power-off voltage, the power-off threshold is set by using the voltage stabilizing value of the second voltage stabilizing diode D5, and the grid voltage of the Q1 is controlled through the switching action of the second triode Q3. The control unit is used for controlling the power supply of the equipment to be turned on and off, when the voltage of the grid electrode of the Q1 is equal to the source voltage, the Q1 is disconnected, no current flows between the source electrode and the drain electrode, and when the voltage of the grid electrode of the Q1 is lower than the source voltage, the Q1 is conducted, and the current is supplied to the equipment from the source electrode to the drain electrode and from the output end.
Further, a backflow preventing diode is connected in series with the first input port, and a backflow preventing diode is connected in series with the second input port.
Further, a voltage stabilizing tube is connected in series between the grid electrode and the negative electrode of the MOS tube to serve as a protection loop.
Further, a diode and a capacitor are connected in parallel between the source electrode and the drain electrode of the MOS tube. Thereby playing the role of follow current and buffer to the MOS tube.
The working process of controlling the overdischarge of the storage battery by using the circuit of the invention is as follows:
the first input port is VIN1, the second input port is VIN2, and VIN1 is connected with an external 15V direct current power supply for converting alternating current into direct current, and VIN2 is connected with a 12V storage battery. The circuit can realize that the voltage is higher than 15V, the device is turned on, the voltage is lower than 12V, the device cannot be turned on when the device is singly connected with a 12V storage battery, because the storage battery is forbidden to discharge when the device is not used, if the device is required to be converted from a turned-off state to an operating state, the device must be turned on by a voltage higher than 15V, and the voltage above 12V can normally work after the device is turned on.
The following illustrates one specific embodiment:
VIN 1=15v, vin2=12v, d4 regulator is used to set the upper threshold v1=14v, d5 regulator is used to set the lower threshold v2=11v.
VIN1 is larger than V1+0.7V, Q2 is conducted, VIN1 flows through the first resistor R1 and the second resistor R2, the grid voltage of Q1 is reduced after the voltage is divided by the first resistor R1 and the second resistor R2, VIN1 is conducted below the source voltage VIN1, VIN1 flows in and out of the drain electrode from the source electrode of Q1, VIN1=15V is larger than V2, Q3 is conducted, current flows through the first resistor R1, the second resistor R2 and the third resistor R3, and the voltage is divided to the grid electrode of Q1, and Q1 is conducted continuously.
When VIN1 disappears, the 12V storage battery VIN2 supplies power, VIN2 is smaller than V1 at the moment, triode Q2 is closed, VIN2 is larger than V2, triode Q3 is continuously conducted, Q1 keeps on continuously outputting in an on state, when the storage battery voltage VIN2 is gradually reduced to be smaller than V2+0.7V, Q3 is cut off, at the moment, the second resistor R2 and the third resistor R3 do not flow current, the grid voltage of Q1 is raised to be high voltage, the same as source voltage VIN2, Q1 is cut off, no current flows between a source electrode and a drain electrode, and VOUT output is zero.
When VIN1 is greater than V1+0.7V, the system will power up again.
If the values of the first zener diode D4 and the second zener diode D5 are adjusted, the application such as 24V battery protection and 36V battery protection can be realized, and the method can also be used in the protection application of the photovoltaic industry battery.
The system realizes that the input voltage is higher than V1 to start the power supply of the equipment, after the equipment is started, the equipment with the input voltage higher than V2 (V1 is more than V2) normally supplies power, the input voltage is lower than V2, the equipment is closed, and the independent power supply is lower than V2, so that the equipment cannot be started. V1 and V2 are adjustable, corresponding parameters are determined according to different use requirements, for example, V1 is 28V, V2 is 24V, and the method can be used for protecting 24V storage batteries and prolonging the service lives of the storage batteries.
The modules or units in the device of the embodiment of the invention can be combined, divided and deleted according to actual needs.
The foregoing disclosure is illustrative of the preferred embodiments of the present invention, and is not to be construed as limiting the scope of the invention, as it is understood by those skilled in the art that all or part of the above-described embodiments may be practiced with equivalents thereof, which fall within the scope of the invention as defined by the appended claims.
Claims (4)
1. A window voltage control storage battery discharge protection circuit based on discrete components is characterized in that: the MOS transistor comprises a first input port, a second input port, an opening unit, a closing unit and a control unit, wherein the first input port is used for being connected with an external first power supply, the second input port is used for being connected with an external second power supply, the control unit is a MOS transistor, the first input port and the second input port are connected in parallel and then are connected with the grid electrode of the MOS transistor, the first input port and the second input port are connected in parallel and then are connected with the source electrode of the MOS transistor, the drain electrode of the MOS transistor is connected with an output port so as to be connected with power supply equipment, the opening unit comprises a first triode, a first voltage stabilizer for setting an upper threshold voltage value, a first resistor and a second resistor, the base electrode of the first triode is connected with the first voltage stabilizer in series, the collector electrode of the first triode is connected with the second resistor in series, the base electrode of the second triode is connected with the first resistor in series, the base electrode of the first triode is connected with the first resistor in series, the base electrode of the second triode is connected with the first input port and the second input port in parallel, the closing unit comprises a second triode, a second voltage stabilizer for setting a lower threshold voltage value, a third resistor is connected with the drain electrode of the second triode is connected with the second triode in series.
2. The discrete component based window voltage controlled battery discharge protection circuit of claim 1, wherein: a backflow preventing diode is connected in series with the first input port, and a backflow preventing diode is connected in series with the second input port.
3. The discrete component based window voltage controlled battery discharge protection circuit of claim 1, wherein: and a voltage stabilizing tube is connected in series between the grid electrode and the negative electrode of the MOS tube and is used as a protection loop.
4. The discrete component based window voltage controlled battery discharge protection circuit of claim 1, wherein: and a diode and a capacitor are connected in parallel between the source electrode and the drain electrode of the MOS tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910915114.1A CN110661313B (en) | 2019-09-26 | 2019-09-26 | Window voltage control storage battery discharge protection circuit based on discrete component |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910915114.1A CN110661313B (en) | 2019-09-26 | 2019-09-26 | Window voltage control storage battery discharge protection circuit based on discrete component |
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| CN110661313A CN110661313A (en) | 2020-01-07 |
| CN110661313B true CN110661313B (en) | 2023-06-02 |
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Citations (7)
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|---|---|---|---|---|
| CN1153413A (en) * | 1995-09-29 | 1997-07-02 | 摩托罗拉公司 | Protection element and method for protecting circuit |
| CN1533006A (en) * | 2003-03-18 | 2004-09-29 | 阳 魏 | Battery discharge protective regulating circuit |
| CN101877478A (en) * | 2010-06-25 | 2010-11-03 | 中兴通讯股份有限公司 | Cell discharge protective device |
| CN103022982A (en) * | 2013-01-11 | 2013-04-03 | 浙江明烁电子科技有限公司 | Storage battery control circuit |
| CN203026923U (en) * | 2013-01-11 | 2013-06-26 | 浙江明烁电子科技有限公司 | Storage battery control circuit |
| CN205945515U (en) * | 2016-06-29 | 2017-02-08 | 成都四威功率电子科技有限公司 | Switching power supply starts and protection circuit |
| CN206461583U (en) * | 2017-02-16 | 2017-09-01 | 惠州晟芯源科技有限公司 | A kind of high-speed switch drive circuit being made up of discrete component |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015172710A1 (en) * | 2014-05-13 | 2015-11-19 | 北京拓盛电子科技有限公司 | Explosion-proof circuit, charging circuit and charging/discharging protection circuit of battery |
| JP6577916B2 (en) * | 2016-07-11 | 2019-09-18 | ミツミ電機株式会社 | Protection IC |
-
2019
- 2019-09-26 CN CN201910915114.1A patent/CN110661313B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1153413A (en) * | 1995-09-29 | 1997-07-02 | 摩托罗拉公司 | Protection element and method for protecting circuit |
| CN1533006A (en) * | 2003-03-18 | 2004-09-29 | 阳 魏 | Battery discharge protective regulating circuit |
| CN101877478A (en) * | 2010-06-25 | 2010-11-03 | 中兴通讯股份有限公司 | Cell discharge protective device |
| CN103022982A (en) * | 2013-01-11 | 2013-04-03 | 浙江明烁电子科技有限公司 | Storage battery control circuit |
| CN203026923U (en) * | 2013-01-11 | 2013-06-26 | 浙江明烁电子科技有限公司 | Storage battery control circuit |
| CN205945515U (en) * | 2016-06-29 | 2017-02-08 | 成都四威功率电子科技有限公司 | Switching power supply starts and protection circuit |
| CN206461583U (en) * | 2017-02-16 | 2017-09-01 | 惠州晟芯源科技有限公司 | A kind of high-speed switch drive circuit being made up of discrete component |
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| CN110661313A (en) | 2020-01-07 |
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