CN111864719A - Reverse-connection-prevention and reverse-flow-prevention charging protection circuit - Google Patents

Reverse-connection-prevention and reverse-flow-prevention charging protection circuit Download PDF

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Publication number
CN111864719A
CN111864719A CN202010850119.3A CN202010850119A CN111864719A CN 111864719 A CN111864719 A CN 111864719A CN 202010850119 A CN202010850119 A CN 202010850119A CN 111864719 A CN111864719 A CN 111864719A
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CN
China
Prior art keywords
resistor
charging
electrically connected
control switch
reverse
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010850119.3A
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Chinese (zh)
Inventor
申民常
宋海峰
张志锋
张勇
李淑平
刘春生
胡韶芳
宋波
张家山
许帅杰
周凤翔
于清海
张增杰
任青松
李伟莉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Henan Xintaihang Power Co ltd
Original Assignee
Henan Xintaihang Power Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Henan Xintaihang Power Co ltd filed Critical Henan Xintaihang Power Co ltd
Priority to CN202010850119.3A priority Critical patent/CN111864719A/en
Publication of CN111864719A publication Critical patent/CN111864719A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
    • H02H11/002—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection
    • H02H11/003—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection using a field effect transistor as protecting element in one of the supply lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
    • 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
    • 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
    • H02J7/00304—Overcurrent protection
    • 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
    • H02J7/00308—Overvoltage protection
    • 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
    • H02J7/0034—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using reverse polarity correcting or protecting circuits
    • 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
    • H02J7/0069—Charging or discharging for charge maintenance, battery initiation or rejuvenation

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention provides a reverse connection prevention and reverse flow prevention charging protection circuit which comprises a control module, a reverse connection prevention module and a reverse connection detection module, wherein the control module comprises a first electric control switch and a second electric control switch, and the first electric control switch and the second electric control switch are connected in a charging loop in series and are positioned between a charging input positive terminal and a charging output positive terminal; the backflow prevention module comprises a voltage comparison circuit, the voltage comparison circuit collects and compares the voltage of the charging front end and the voltage of the charging rear end, and the control end of the voltage comparison circuit is electrically connected with the control ends of the first electric control switch and the second electric control switch; the collection end of the reverse connection detection module is electrically connected with the positive electrode end of the charging output, and the control end of the reverse connection detection module is electrically connected with the control ends of the first electric control switch and the second electric control switch. The reverse connection prevention and the reverse connection prevention of the charging circuit are realized through the control module, the reverse connection prevention module and the reverse connection detection module, so that the charging circuit is protected.

Description

Reverse-connection-prevention and reverse-flow-prevention charging protection circuit
Technical Field
The invention relates to the field of battery chargers, in particular to an anti-reverse-connection and anti-reverse-flow charging protection circuit.
Background
In systems such as hybrid cars, trains, and airplanes, the battery pack is used as an important energy storage unit as an emergency power source for the system. In order to keep the battery pack in a fully charged state, an online charger is provided. If the voltage of the storage battery pack is higher than the output voltage of the charger or the battery is reversely connected, a loop may be formed through a transformer coil and the like in the charger DC/DC module, which may cause damage of the charger, even explosion of the battery, and serious consequences such as fire and the like.
In the prior art, a backflow prevention protection circuit is generally connected with a diode or an MOS tube in series at the output end of a charger; the battery reverse connection prevention protection circuit is mainly realized by connecting a reverse connection diode in parallel at the output end and connecting a fuse in series. When the heavy current is charged, the backward flow prevention diode has larger voltage drop and more serious heat generation, and the conversion efficiency of the charger is reduced; when the battery is reversely connected, a large-current loop is formed by the storage battery, the reverse connection diode and the fuse, the fuse is fused, the charger is protected, the fuse needs to be replaced, and the like, so that the maintenance work is increased.
Disclosure of Invention
The invention provides an anti-reverse-connection and anti-reverse-flow charging protection circuit, which aims to solve the problems in the prior art, prevent current from flowing backwards when the voltage of a storage battery pack is greater than the output voltage of a charger, and automatically protect the storage battery pack and the charger when the positive electrode and the negative electrode of the storage battery pack are reversely connected.
A reverse connection and reverse flow prevention charging protection circuit comprises a control module, a reverse flow prevention module and a reverse connection detection module, wherein the control module comprises a first electric control switch and a second electric control switch which are connected in series in a charging loop and positioned between a charging input positive terminal and a charging output positive terminal; the backflow prevention module comprises a voltage comparison circuit, the voltage comparison circuit collects and compares the voltage between the charging input positive terminal and the charging input negative terminal and the voltage between the charging output positive terminal and the charging output negative terminal, and the control end of the voltage comparison circuit is electrically connected with the control ends of the first electric control switch and the second electric control switch; the collecting end of the reverse connection detection module is electrically connected with the positive charging output end, and the control end of the reverse connection detection module is electrically connected with the control ends of the first electric control switch and the second electric control switch.
Further comprises the following steps: the first electric control switch and the second electric control switch are both PMOS tubes with low on-resistance.
Further comprises the following steps: the first electronic control switch is a MOS tube Q1, the second electronic control switch is a MOS tube Q2, the D pole of the MOS tube Q1 is electrically connected with the positive electrode end of the charging input, the S pole and the G pole of the MOS tube Q1 are correspondingly and electrically connected with the S pole and the G pole of the MOS tube Q2 one by one, a resistor R1 and a resistor R2 are connected in series between the G pole of the MOS tube Q1 and the G pole of the MOS tube Q2, a resistor R3 is connected in parallel between the common end of the S poles of the MOS tube Q1 and the MOS tube Q2 and the common end of the resistor R1 and the resistor R2, and the D pole of the MOS tube Q2 is electrically connected with the positive electrode end of the charging output; the charging input negative electrode end is electrically connected with the charging output negative electrode end; the forward current directions of the parasitic diodes in the MOS transistor Q1 and the MOS transistor Q2 are from the drain electrode to the source electrode;
the control module comprises an optical coupler U2, the anode of the emitting end in the optical coupler U2 is electrically connected with the common end of the MOS tube Q1 and the MOS tube Q2 after passing through a resistor R5, and the cathode of the emitting end in the optical coupler U2 is electrically connected with the charging output cathode end; the positive electrode of the receiving end in the optocoupler U2 is electrically connected with the common end of the resistor R1 and the resistor R2.
Further comprises the following steps: the voltage comparison circuit comprises a voltage comparator U1, a resistor R6, a resistor R7, a resistor R8 and a resistor R9, the resistance ratio of the resistor R6 to the resistor R8 is the same as that of the resistor R7 to the resistor R9, the resistor R6 and the resistor R8 are sequentially connected in series and then connected in parallel between a charging input positive terminal and a charging input negative terminal, and the common end of the resistor R6 and the resistor R8 is electrically connected with a non-inverting input end of the voltage comparator U1; the resistor R7 and the resistor R9 are sequentially connected in series and then connected in parallel between the positive end of the charging output and the negative end of the charging output, and the common end of the resistor R7 and the resistor R9 is electrically connected with the inverting input end of the voltage comparator U1; the output end of the voltage comparator U1 is electrically connected with the cathode of a diode D1, and the anode of the diode D1 is electrically connected with the anode of the emitting end in the optocoupler U2.
Further comprises the following steps: the reverse connection detection module comprises an optical coupler U3, wherein the positive electrode of the receiving end in the optical coupler U3 is electrically connected with the positive electrode of the transmitting end in the optical coupler U2, the negative electrode of the receiving end in the optical coupler U3 is electrically connected with the negative electrode of the transmitting end in the optical coupler U2, the positive electrode of the emitter in the optical coupler U3 is electrically connected with the negative electrode end of the charging output, and the negative electrode of the emitter in the optical coupler U3 is electrically connected with the positive electrode end of the charging output after passing through a resistor R10.
The invention has the beneficial effects that: comparing the voltage of the storage battery pack with the voltage of the charger, and when the output voltage of the charger is greater than the voltage of the storage battery pack, switching on a first electric control switch and a second electric control switch of a control module in a charging loop, namely an MOS (metal oxide semiconductor) tube Q1 and an MOS tube Q2, so as to charge the storage battery pack; when the voltage of the storage battery pack is greater than the output voltage of the charger, the first electric control switch and the second electric control switch are closed to protect the charger; when the positive electrode and the negative electrode of the storage battery pack are reversely connected, the first electric control switch and the second electric control switch of the control module in the charging loop are detected and disconnected through the reverse connection detection module, and the charger and the battery are protected. The circuit only has two electric control switches in a charging loop, adopts a PMOS tube with low on-resistance, has the voltage drop of only about 0.1V when the on-resistance is about 5m omega and the charging current is 10A, has small heat productivity, automatically protects the storage battery when reversely connected, automatically recovers charging when the battery recovers, and is convenient to maintain. The circuit is powered by the output of the charger or the storage battery pack without an additional auxiliary power supply; the method can be realized by a hardware circuit without using a microcontroller for control, and the circuit is simple, low in cost, long in service life and has a plurality of expandable characteristics.
Drawings
FIG. 1 is a block diagram of the present invention;
fig. 2 is a circuit diagram of the invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings. Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention. The terms of orientation such as left, center, right, up, down, etc. in the examples of the present invention are only relative to each other or are referred to the normal use state of the product, and should not be considered as limiting.
A reverse connection and reverse flow prevention charging protection circuit is shown in figure 1 and comprises a control module, a reverse flow prevention module and a reverse connection detection module, wherein the control module comprises a first electric control switch and a second electric control switch which are connected in series in a charging loop and positioned between a charging input positive terminal and a charging output positive terminal; the backflow prevention module comprises a voltage comparison circuit, the voltage comparison circuit collects and compares the voltage between the charging input positive terminal and the charging input negative terminal and the voltage between the charging output positive terminal and the charging output negative terminal, and the control end of the voltage comparison circuit is electrically connected with the control ends of the first electric control switch and the second electric control switch; the collecting end of the reverse connection detection module is electrically connected with the positive charging output end, and the control end of the reverse connection detection module is electrically connected with the control ends of the first electric control switch and the second electric control switch.
The first electric control switch and the second electric control switch are both PMOS tubes, and the first electric control switch and the second electric control switch are both PMOS tubes with low on-resistance.
As shown in fig. 2, the first electrically controlled switch is a MOS transistor Q1, the second electrically controlled switch is a MOS transistor Q2, a D pole of the MOS transistor Q1 is electrically connected to a positive charging input terminal, an S pole and a G pole of the MOS transistor Q1 are electrically connected to an S pole and a G pole of the MOS transistor Q2 in a one-to-one correspondence, a resistor R1 and a resistor R2 are connected in series between the G pole of the MOS transistor Q1 and the G pole of the MOS transistor Q2, a resistor R3 is connected in parallel between a common terminal of the S poles of the MOS transistor Q1 and the MOS transistor Q2 and a common terminal of the resistor R1 and the resistor R2, and a D pole of the MOS transistor Q2 is electrically connected to a positive charging output terminal; the charging input negative electrode end is electrically connected with the charging output negative electrode end; the forward current directions of the parasitic diodes in the MOS transistor Q1 and the MOS transistor Q2 are from the drain electrode to the source electrode; the control module further comprises an optical coupler U2, the positive electrode of the emitting end in the optical coupler U2 is electrically connected with the common end of the MOS tube Q1 and the MOS tube Q2 after passing through a resistor R5, and the negative electrode of the emitting end in the optical coupler U2 is electrically connected with the charging output negative electrode end; the positive electrode of the receiving end in the optocoupler U2 is electrically connected with the common end of the resistor R1 and the resistor R2;
the voltage comparison circuit comprises a voltage comparator U1, a resistor R6, a resistor R7, a resistor R8 and a resistor R9, the resistance ratio of the resistor R6 to the resistor R8 is the same as that of the resistor R7 to the resistor R9, the resistor R6 and the resistor R8 are sequentially connected in series and then connected in parallel between a charging input positive terminal and a charging input negative terminal, and the common end of the resistor R6 and the resistor R8 is electrically connected with a non-inverting input end of the voltage comparator U1; the resistor R7 and the resistor R9 are sequentially connected in series and then connected in parallel between the positive end of the charging output and the negative end of the charging output, and the common end of the resistor R7 and the resistor R9 is electrically connected with the inverting input end of the voltage comparator U1; the output end of the voltage comparator U1 is electrically connected with the cathode of a diode D1, and the anode of the diode D1 is electrically connected with the anode of the emitting end in the optocoupler U2;
the reverse connection detection module comprises an optical coupler U3, wherein the positive electrode of the receiving end in the optical coupler U3 is electrically connected with the positive electrode of the transmitting end in the optical coupler U2, the negative electrode of the receiving end in the optical coupler U3 is electrically connected with the negative electrode of the transmitting end in the optical coupler U2, the positive electrode of the emitter in the optical coupler U3 is electrically connected with the negative electrode end of the charging output, and the negative electrode of the emitter in the optical coupler U3 is electrically connected with the positive electrode end of the charging output after passing through a resistor R10.
The working principle of the invention is as follows: when the storage battery pack is normally connected according to fig. 2 and the output voltage of the charger is greater than that of the storage battery pack, the forward end of the voltage comparator U1 is greater than the reverse end, so the voltage comparator U1 outputs a high level, the positive electrode of the emitter in the optocoupler U2 is at a high level, the negative electrode of the emitter is at a low level, so the optocoupler U2 is turned on, the source voltages of the MOS transistor Q1 and the MOS transistor Q2 are greater than the respective gate voltages, the MOS transistor Q1 and the MOS transistor Q2 are both in a conducting state, and the charger charges the storage battery pack. When the output of the charger is smaller than that of the storage battery pack, the voltage comparator U1 outputs a low level, the positive electrode of the emitter in the optical coupler U2 is at the low level, the receiving electrode and the emitter of the optical coupler U2 are not conducted, the source voltages of the MOS tube Q1 and the MOS tube Q2 are both equal to the gate voltages of the MOS tube Q3538 and the MOS tube Q15, the MOS tube Q1 and the MOS tube Q15 are both in an off state, and the charger cannot charge the storage battery pack.
When the storage battery pack is reversely connected, the light emitting tube of the optical coupler U3 is lighted, so that the anode of the emitter in the optical coupler U2 is at a low level, the source voltages of the MOS tube Q1 and the MOS tube Q2 are both equal to the respective gate voltages, and the MOS tube Q1 and the MOS tube Q2 are in a cut-off state, so that a discharge loop cannot be formed to protect the storage battery pack and the charger.
In addition, the circuit is easy to expand, and over-current protection, over-voltage protection and the like can be added on the basis.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (5)

1. The utility model provides a prevent reverse connection and prevent flowing backward charging protection circuit which characterized in that: the control module comprises a first electric control switch and a second electric control switch, and the first electric control switch and the second electric control switch are connected in series in the charging loop and positioned between the charging input positive terminal and the charging output positive terminal; the backflow prevention module comprises a voltage comparison circuit, the voltage comparison circuit collects and compares the voltage between the charging input positive terminal and the charging input negative terminal and the voltage between the charging output positive terminal and the charging output negative terminal, and the control end of the voltage comparison circuit is electrically connected with the control ends of the first electric control switch and the second electric control switch; the collecting end of the reverse connection detection module is electrically connected with the positive charging output end, and the control end of the reverse connection detection module is electrically connected with the control ends of the first electric control switch and the second electric control switch.
2. The reverse-connection-prevention reverse-flow-prevention charging protection circuit according to claim 1, characterized in that: the first electric control switch and the second electric control switch are both PMOS tubes with low on-resistance.
3. The reverse-connection-prevention reverse-flow-prevention charging protection circuit according to claim 2, characterized in that: the first electronic control switch is a MOS tube Q1, the second electronic control switch is a MOS tube Q2, the D pole of the MOS tube Q1 is electrically connected with the positive electrode end of the charging input, the S pole and the G pole of the MOS tube Q1 are correspondingly and electrically connected with the S pole and the G pole of the MOS tube Q2 one by one, a resistor R1 and a resistor R2 are connected in series between the G pole of the MOS tube Q1 and the G pole of the MOS tube Q2, a resistor R3 is connected in parallel between the common end of the S poles of the MOS tube Q1 and the MOS tube Q2 and the common end of the resistor R1 and the resistor R2, and the D pole of the MOS tube Q2 is electrically connected with the positive electrode end of the charging output; the charging input negative electrode end is electrically connected with the charging output negative electrode end; the forward current directions of the parasitic diodes in the MOS transistor Q1 and the MOS transistor Q2 are from the drain electrode to the source electrode;
the control module comprises an optical coupler U2, the anode of the emitting end in the optical coupler U2 is electrically connected with the common end of the MOS tube Q1 and the MOS tube Q2 after passing through a resistor R5, and the cathode of the emitting end in the optical coupler U2 is electrically connected with the charging output cathode end; the positive electrode of the receiving end in the optocoupler U2 is electrically connected with the common end of the resistor R1 and the resistor R2.
4. The reverse-connection-prevention reverse-flow-prevention charging protection circuit according to claim 3, characterized in that: the voltage comparison circuit comprises a voltage comparator U1, a resistor R6, a resistor R7, a resistor R8 and a resistor R9, the resistance ratio of the resistor R6 to the resistor R8 is the same as that of the resistor R7 to the resistor R9, the resistor R6 and the resistor R8 are sequentially connected in series and then connected in parallel between a charging input positive terminal and a charging input negative terminal, and the common end of the resistor R6 and the resistor R8 is electrically connected with a non-inverting input end of the voltage comparator U1; the resistor R7 and the resistor R9 are sequentially connected in series and then connected in parallel between the positive end of the charging output and the negative end of the charging output, and the common end of the resistor R7 and the resistor R9 is electrically connected with the inverting input end of the voltage comparator U1; the output end of the voltage comparator U1 is electrically connected with the cathode of a diode D1, and the anode of the diode D1 is electrically connected with the anode of the emitting end in the optocoupler U2.
5. The reverse-connection-prevention reverse-flow-prevention charging protection circuit according to claim 4, characterized in that: the reverse connection detection module comprises an optical coupler U3, wherein the positive electrode of the receiving end in the optical coupler U3 is electrically connected with the positive electrode of the transmitting end in the optical coupler U2, the negative electrode of the receiving end in the optical coupler U3 is electrically connected with the negative electrode of the transmitting end in the optical coupler U2, the positive electrode of the emitter in the optical coupler U3 is electrically connected with the negative electrode end of the charging output, and the negative electrode of the emitter in the optical coupler U3 is electrically connected with the positive electrode end of the charging output.
CN202010850119.3A 2020-08-21 2020-08-21 Reverse-connection-prevention and reverse-flow-prevention charging protection circuit Pending CN111864719A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010850119.3A CN111864719A (en) 2020-08-21 2020-08-21 Reverse-connection-prevention and reverse-flow-prevention charging protection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010850119.3A CN111864719A (en) 2020-08-21 2020-08-21 Reverse-connection-prevention and reverse-flow-prevention charging protection circuit

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CN111864719A true CN111864719A (en) 2020-10-30

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113258648A (en) * 2021-06-17 2021-08-13 杭州富特科技股份有限公司 Circuit for preventing battery voltage loss of output side of vehicle-mounted DCDC converter
CN114161932A (en) * 2021-11-18 2022-03-11 深圳欣锐科技股份有限公司 Backflow prevention detection circuit and method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113258648A (en) * 2021-06-17 2021-08-13 杭州富特科技股份有限公司 Circuit for preventing battery voltage loss of output side of vehicle-mounted DCDC converter
CN113258648B (en) * 2021-06-17 2021-12-07 浙江富特科技股份有限公司 Circuit for preventing battery voltage loss of output side of vehicle-mounted DCDC converter
WO2022262295A1 (en) * 2021-06-17 2022-12-22 浙江富特科技股份有限公司 Circuit for preventing loss of battery voltage on output side of vehicle-mounted dcdc converter
CN114161932A (en) * 2021-11-18 2022-03-11 深圳欣锐科技股份有限公司 Backflow prevention detection circuit and method
CN114161932B (en) * 2021-11-18 2024-03-15 深圳欣锐科技股份有限公司 Anti-backflow detection circuit and method

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