CN114189019A - Security protection power supply uninterruptible battery self-checking circuit and control method thereof - Google Patents
Security protection power supply uninterruptible battery self-checking circuit and control method thereof Download PDFInfo
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- CN114189019A CN114189019A CN202111527868.3A CN202111527868A CN114189019A CN 114189019 A CN114189019 A CN 114189019A CN 202111527868 A CN202111527868 A CN 202111527868A CN 114189019 A CN114189019 A CN 114189019A
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- battery
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000001105 regulatory effect Effects 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 12
- 230000001276 controlling effect Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 229910044991 metal oxide Inorganic materials 0.000 claims 1
- 150000004706 metal oxides Chemical class 0.000 claims 1
- 239000004065 semiconductor Substances 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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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
- H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
-
- 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
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
-
- 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
- H02J7/007—Regulation of charging or discharging current or voltage
-
- 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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
-
- 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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
-
- 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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a security power supply uninterrupted battery self-checking circuit, wherein the security power supply comprises an input power supply, an external load and a battery; the external load and the battery are connected with the input power supply, the external load is connected with the input power supply to work, and the battery is connected with the input power supply to charge. In the battery self-checking process, if the security protection power supply is suddenly powered off, the external load is not influenced, the battery can be self-checked, and can be simultaneously subjected to protection output, so that the battery self-checking efficiency in the security protection power supply is improved, the power-off risk in an emergency is reduced, and the battery can be directly subjected to secondary awakening operation.
Description
Technical Field
The invention relates to a battery detection technology, in particular to a security protection power supply uninterruptible battery self-detection circuit and a control method thereof.
Technical Field
The security power supply is used as a safe standby power supply and needs to work under any working condition, so that in a conventional product, a charging circuit is established in the power supply, the power supply has a charging function, and meanwhile, the security power supply is provided with a UPS function and is applied to various special working conditions, so that the security power supply is very important to the stability and the safety of the security power supply.
In daily life and work, a battery in a power supply needs to be detected at intervals, the performance of the battery needs to be confirmed, and meanwhile, whether the battery is disconnected or not is judged.
Therefore, the present invention is directed to provide a self-checking circuit for a battery without power failure in a security power supply and a control method thereof, so as to solve the existing technical problems and provide a self-checking circuit for a battery without power failure.
Disclosure of Invention
The invention mainly aims to provide a security power supply uninterruptible battery self-checking circuit and a control method thereof, which can perform battery self-checking on a battery in a security power supply under the uninterruptible condition, perform voltage reduction detection on the battery by using a detection circuit, and wake up the battery under the input power-off condition.
In order to achieve the above object, the present invention provides a security power supply uninterrupted battery self-checking circuit, the security power supply includes an input power supply, an external load and a battery; the external load and the battery are connected with the input power supply, the external load is connected with the input power supply to work, and the battery is connected with the input power supply to charge; the self-checking circuit comprises a pulse width modulation controller, a current detector and an MOS tube circuit; the pulse width modulation controller is connected with the circuit detector and is connected to the input power supply, the pulse width modulation controller outputs modulation voltage, adjusts the voltage of the input power supply and outputs an adjustment voltage, an external load receives a working voltage, and the adjustment voltage is output in the security protection power supply; the input power supply outputs a power supply voltage, and when the power supply voltage is lower than the lower limit of the power supply output specification, the input power supply does not output voltage; the battery outputs a battery voltage, when the battery voltage is smaller than the adjustment voltage, the battery is in a charging state, and when the battery voltage is larger than the adjustment voltage, the battery voltage is used as the output voltage of the external load for discharging; the current detector detects the current inside the whole security protection power supply;
the control method of the self-checking circuit of the security power supply comprises the following steps: controlling the PWM controller to output the regulated voltage, and reducing the output value of the regulated voltage to be below the lower limit of the output specification of the input power supply, wherein the battery voltage output by the battery is greater than the regulated voltage, the input power supply does not supply power any more, and the battery supplies power to the external load; at the moment, the current detector detects the current on the external load and the battery, the external load receives a working current, the battery outputs a battery current, and when the battery current is zero and the battery voltage is equal to the regulated voltage, the disconnection of the battery is indicated, and the MOS tube circuit is disconnected; when the battery current is larger than zero and the battery voltage is larger than the working voltage, namely the voltage output by the battery is larger than the lowest protection voltage received by the external load in the power-off state, the battery state is normal and the self-checking work is finished.
In an embodiment of the present invention, a secondary battery self-test is performed after the disconnection of the battery is determined, and if the MOS transistor circuit is closed, a wake-up operation is performed on the battery; and if the MOS tube circuit is still disconnected, judging that the MOS tube circuit is a circuit fault and needing to be overhauled.
In an embodiment of the present invention, if the input power is powered off, the regulated voltage cannot be output; the battery performs voltage output to the external load while performing self-test, and the lowest protection voltage is maintained.
In an embodiment of the invention, the MOS transistor circuit includes at least one MOS transistor and at least one detection resistor, and the MOS transistor and the detection resistor are connected in series between the input power supply and the battery to form a charging circuit.
In an embodiment of the invention, the charging circuit is no longer disconnected during self-test, and the input power supply is connected in parallel with the external load.
The invention has the beneficial effects that in the self-checking process of the battery, if the security power supply is suddenly powered off, the external load cannot be influenced, the battery not only can be self-checked, but also can be simultaneously protected and output, the self-checking efficiency of the battery in the security power supply is improved, the power failure risk in an emergency is reduced, and the battery can be directly awakened for the second time.
Drawings
Fig. 1 is a circuit block diagram of a universal charging device according to an embodiment of the present invention.
Wherein: inputting a power supply: AC/DC, external load: LOAD, battery: BAT, pulse width modulation controller: PMW CONTROL, current detector: current DETECTION, MOS
A tube circuit: oring, adjusting voltage: v-set, power supply voltage: vo, operating voltage: v-load, operating current: i-load, battery voltage: v-bat, battery current: i-bat, lowest protection power supply: UVP.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
Embodiments of the invention are further illustrated by the following description in conjunction with the related drawings. Wherever possible, the same reference numbers will be used throughout the drawings and the description to refer to the same or like parts. In the drawings, the shape and thickness may be exaggerated for simplicity and convenience. It is to be understood that elements not specifically shown in the drawings or described in the specification are of a type well known to those of ordinary skill in the art. Many variations and modifications may be made by one of ordinary skill in the art in light of the teachings of the present invention.
Unless specifically stated otherwise, some conditional clauses or words, such as "may", "result", "Perhap", "may", or "may", are generally intended to convey that the present embodiment has, but may also be interpreted as having, features, components, or steps that may not be required. In other embodiments, these features, components, or steps may not be required.
Referring to fig. 1, an embodiment of a detection circuit and a self-test control method according to the invention will be described.
A security protection power supply uninterrupted battery self-checking circuit comprises an input power supply, an external load and a battery, wherein the input power supply comprises an input power supply, an external load and a battery; the external load and the battery are connected with the input power supply, the external load is connected with the input power supply to work, and the battery is connected with the input power supply to charge; the self-checking circuit comprises a pulse width modulation controller, a current detector and an MOS tube circuit; the pulse width modulation controller is connected with the circuit detector and is connected to the input power supply, the pulse width modulation controller outputs modulation voltage, adjusts the voltage of the input power supply and outputs an adjustment voltage, an external load receives a working voltage, and the adjustment voltage is output in the security protection power supply; the input power supply outputs a power supply voltage, and when the power supply voltage is lower than the lower limit of the power supply output specification, the input power supply does not output voltage; the battery outputs a battery voltage, when the battery voltage is smaller than the adjustment voltage, the battery is in a charging state, and when the battery voltage is larger than the adjustment voltage, the battery voltage is used as the output voltage of the external load for discharging; the current detector detects the current inside the whole security protection power supply;
the control method of the self-checking circuit of the security power supply comprises the following steps: controlling the pulse width modulation controller to output the regulated voltage V-set, and reducing the output value of the regulated voltage V-set to be below the lower limit of the output voltage Vo specification of the input power supply, namely Vo-min, wherein at the moment, the battery voltage output by the battery is greater than the regulated voltage, the input power supply does not supply power any more, and the battery supplies power to the external load; when the battery current I-bat is zero and the battery voltage is equal to the power supply voltage, i.e. V-bat is Vo, it indicates that the battery is disconnected, and the MOS transistor circuit Oring is disconnected; when the battery current I-bat is larger than zero and the battery voltage is larger than the working voltage, namely the voltage output by the battery is larger than the lowest protection voltage received by the external load in the power-off state, V-bat is larger than UVP, the battery state is normal, and the self-checking work is finished.
In an embodiment of the present invention, a secondary battery self-test is performed after the disconnection of the battery is determined, and if the MOS transistor circuit is closed, a wake-up operation is performed on the battery; and if the MOS tube circuit is still disconnected, judging that the MOS tube circuit is a circuit fault and needing to be overhauled.
In an embodiment of the present invention, if the input power is powered off, the regulated voltage cannot be output; the battery performs voltage output to the external load while performing self-test, and the lowest protection voltage is maintained.
In an embodiment of the invention, the MOS transistor circuit includes at least one MOS transistor and at least one detection resistor, and the MOS transistor and the detection resistor are connected in series between the input power supply and the battery to form a charging circuit.
In an embodiment of the invention, the charging circuit is no longer disconnected during self-test, and the input power supply is connected in parallel with the external load.
Claims (5)
1. A security protection power supply uninterrupted power battery self-checking circuit and a control method thereof are provided, wherein the security protection power supply comprises an input power supply, an external load and a battery; the external load and the battery are connected with the input power supply, the external load is connected with the input power supply to work, and the battery is connected with the input power supply to charge;
the self-checking circuit of the security power supply is characterized by comprising a pulse width modulation controller, a current detector and an MOS (metal oxide semiconductor) tube circuit; the pulse width modulation controller is connected with the circuit detector and is connected to the input power supply, the pulse width modulation controller outputs modulation voltage, adjusts the voltage of the input power supply and outputs an adjustment voltage, an external load receives a working voltage, and the adjustment voltage is output in the security protection power supply; the input power supply outputs a power supply voltage, and when the power supply voltage is lower than the lower limit of the power supply output specification, the input power supply does not output voltage; the battery outputs a battery voltage, when the battery voltage is smaller than the adjustment voltage, the battery is in a charging state, and when the battery voltage is larger than the adjustment voltage, the battery voltage is used as the output voltage of the external load for discharging; the current detector detects the current inside the whole security protection power supply;
the control method of the self-checking circuit of the security power supply comprises the following steps: controlling the PWM controller to output the regulated voltage, and reducing the output value of the regulated voltage to be below the lower limit of the output specification of the input power supply, wherein the battery voltage output by the battery is greater than the regulated voltage, the input power supply does not supply power any more, and the battery supplies power to the external load; at the moment, the current detector detects the current on the external load and the battery, the external load receives a working current, the battery outputs a battery current, and when the battery current is zero and the battery voltage is equal to the regulated voltage, the disconnection of the battery is indicated, and the MOS tube circuit is disconnected; when the battery current is larger than zero and the battery voltage is larger than the working voltage, namely the voltage output by the battery is larger than the lowest protection voltage received by the external load in the power-off state, the battery state is normal and the self-checking work is finished.
2. The security power supply uninterruptible power supply self-checking circuit and the control method thereof according to claim 1 are characterized in that secondary battery self-checking is performed after the battery is judged to be disconnected, and if the MOS tube circuit is closed, the battery is awakened; and if the MOS tube circuit is still disconnected, judging that the MOS tube circuit is a circuit fault and needing to be overhauled.
3. The security power supply uninterruptible battery self-test circuit and the control method thereof according to claim 1, wherein if the input power supply is powered off and cannot output an adjustment voltage; the battery performs voltage output to the external load while performing self-test, and the lowest protection voltage is maintained.
4. The self-checking circuit of the security power supply uninterruptible battery and the control method thereof according to claim 1, characterized in that the MOS tube circuit comprises at least one MOS tube and at least one detection resistor, the MOS tube and the detection resistor are connected in series between the input power supply and the battery to form a charging circuit.
5. The security power supply uninterruptible battery self-test circuit and the control method thereof according to claim 4, wherein the charging circuit is not disconnected during self-test and is connected in parallel with the external load to the input power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111527868.3A CN114189019A (en) | 2021-12-14 | 2021-12-14 | Security protection power supply uninterruptible battery self-checking circuit and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111527868.3A CN114189019A (en) | 2021-12-14 | 2021-12-14 | Security protection power supply uninterruptible battery self-checking circuit and control method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN114189019A true CN114189019A (en) | 2022-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111527868.3A Pending CN114189019A (en) | 2021-12-14 | 2021-12-14 | Security protection power supply uninterruptible battery self-checking circuit and control method thereof |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5458991A (en) * | 1993-05-19 | 1995-10-17 | Sl Waber, Inc. | UPS with auto self test |
| CN103490499A (en) * | 2013-08-02 | 2014-01-01 | 深圳市智远能科技有限公司 | Uninterrupted power supply method with power module and battery combined |
| CN205004827U (en) * | 2015-07-15 | 2016-01-27 | 浙江骐远智能科技有限公司 | A power management system for bicycle website |
| CN105576766A (en) * | 2016-02-18 | 2016-05-11 | 矽力杰半导体技术(杭州)有限公司 | Automatic load detection circuit and mobile power supply applying the circuit |
| CN108307563A (en) * | 2018-03-01 | 2018-07-20 | 宁波市普乐电器有限公司 | Integral LED driving with emergent self-checking function and its self checking method |
| CN109066962A (en) * | 2018-08-24 | 2018-12-21 | 佛山市众盈电子有限公司 | Off-line UPS power-supply system |
| CN112653225A (en) * | 2021-01-18 | 2021-04-13 | 山东理工大学 | Intelligent power management system powered by photovoltaic cell |
-
2021
- 2021-12-14 CN CN202111527868.3A patent/CN114189019A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5458991A (en) * | 1993-05-19 | 1995-10-17 | Sl Waber, Inc. | UPS with auto self test |
| CN103490499A (en) * | 2013-08-02 | 2014-01-01 | 深圳市智远能科技有限公司 | Uninterrupted power supply method with power module and battery combined |
| CN205004827U (en) * | 2015-07-15 | 2016-01-27 | 浙江骐远智能科技有限公司 | A power management system for bicycle website |
| CN105576766A (en) * | 2016-02-18 | 2016-05-11 | 矽力杰半导体技术(杭州)有限公司 | Automatic load detection circuit and mobile power supply applying the circuit |
| CN108307563A (en) * | 2018-03-01 | 2018-07-20 | 宁波市普乐电器有限公司 | Integral LED driving with emergent self-checking function and its self checking method |
| CN109066962A (en) * | 2018-08-24 | 2018-12-21 | 佛山市众盈电子有限公司 | Off-line UPS power-supply system |
| CN112653225A (en) * | 2021-01-18 | 2021-04-13 | 山东理工大学 | Intelligent power management system powered by photovoltaic cell |
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