CN117118032B - Battery reverse connection preventing circuit and battery reverse connection preventing system - Google Patents
Battery reverse connection preventing circuit and battery reverse connection preventing system Download PDFInfo
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- CN117118032B CN117118032B CN202311181793.7A CN202311181793A CN117118032B CN 117118032 B CN117118032 B CN 117118032B CN 202311181793 A CN202311181793 A CN 202311181793A CN 117118032 B CN117118032 B CN 117118032B
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- 238000007599 discharging Methods 0.000 claims abstract description 11
- 239000003990 capacitor Substances 0.000 claims description 34
- 230000000087 stabilizing effect Effects 0.000 claims description 21
- 230000005669 field effect Effects 0.000 claims description 6
- 230000002265 prevention Effects 0.000 abstract description 6
- 229910002601 GaN Inorganic materials 0.000 description 11
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 11
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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
- H02J7/0034—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
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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
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a reverse connection preventing circuit and a reverse connection preventing system for a battery. The reverse connection preventing circuit of the battery comprises: a charger; an anti-reflection transistor electrically connected with the charger; the constant current source module comprises a driving power supply and a control unit, the driving power supply is electrically connected with the control unit, and the control unit is electrically connected with the anti-reflection transistor; the voltage clamping module is electrically connected with the charger, the control unit and the anti-reflection transistor respectively; the main control module is electrically connected with the driving power supply and the control unit respectively; the discharging module is electrically connected with the main control module, the control unit, the voltage clamping module, the charger and the anti-reflection transistor respectively, wherein the main control module is also used for controlling the discharging module to discharge the anti-reflection transistor according to the control signal; and the reverse connection protection module is electrically connected with the voltage clamping module and the charger respectively. The invention improves the stability of reverse connection prevention.
Description
Technical Field
The invention relates to the technical field of reverse connection protection, in particular to a reverse connection prevention circuit of a battery and a reverse connection prevention system of the battery.
Background
At present, a reverse connection preventing circuit is arranged in a battery charging and discharging circuit so as to protect a charger and a battery. In the related art, the anti-reverse transistor gallium nitride transistor is a third generation wide bandgap semiconductor device, and has the characteristic of no body diode, so that the anti-reverse transistor gallium nitride transistor can be applied to an anti-reverse circuit. In the process of charging and discharging the battery, the voltage of the battery can change, and at the moment, the voltage of the grid electrode and the drain electrode of the anti-reverse-tube gallium nitride transistor can also change due to the relation of series voltage division, so that the conduction condition, the temperature and the service life of the anti-reverse-tube gallium nitride transistor are influenced, and the performance of an anti-reverse-connection circuit is further influenced. Therefore, how to provide a battery anti-reverse connection circuit, which can stabilize the voltage of the grid electrode and the drain electrode of the anti-reverse transistor gallium nitride transistor so as to ensure the stability of anti-reverse connection, is a technical problem to be solved.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a battery reverse connection preventing circuit and a battery reverse connection preventing system, which can improve the stability of reverse connection prevention.
A battery anti-reverse connection circuit according to an embodiment of the first aspect of the present invention, the circuit comprising:
the charger is used for providing a charging power supply for the target battery;
An anti-reflection transistor electrically connected to the charger;
The constant current source module comprises a driving power supply and a control unit, wherein the driving power supply is electrically connected with the control unit, and the control unit is electrically connected with the anti-reflection transistor;
the voltage clamping module is respectively and electrically connected with the charger, the control unit and the anti-reflection transistor, and is used for carrying out voltage clamping operation on the anti-reflection transistor so as to enable the anti-reflection transistor to have constant voltage;
The main control module is respectively and electrically connected with the driving power supply and the control unit, and is used for controlling the working state of the control unit according to a control signal, wherein the anti-reflection transistor is used for being switched on or off according to the working state and the driving voltage provided by the driving power supply;
the discharging module is electrically connected with the main control module, the control unit, the voltage clamping module, the charger and the anti-reflection transistor respectively, wherein the main control module is further used for controlling the discharging module to discharge the anti-reflection transistor according to the control signal;
the reverse connection protection module is electrically connected with the voltage clamping module and the charger respectively, and is also used for being electrically connected with the target battery, and the reverse connection protection module is used for carrying out reverse connection protection operation on the target battery.
The battery reverse connection preventing circuit provided by the embodiment of the invention has at least the following beneficial effects: through with constant current source module and anti-transistor electric connection, carry out voltage clamp operation to anti-transistor through voltage clamp module to carry out the operation of releasing to anti-transistor through the module of releasing, when making the voltage of target battery change, the grid-drain electrode voltage of anti-transistor can keep invariable, and anti-transistor can normally switch on and turn off so, thereby guaranteed the stability of preventing reverse connection protection to target battery.
According to some embodiments of the invention, the control unit comprises:
The emitter of the first voltage-controlled current element is electrically connected with the driving power supply;
the emitter of the second voltage-controlled current element is electrically connected with the driving power supply, the base of the second voltage-controlled current element is electrically connected with the base of the first voltage-controlled current element, and the collector of the second voltage-controlled current element is electrically connected with the bleeder module and the voltage clamping module respectively;
One end of the first resistor is electrically connected with the collector electrode of the first voltage-controlled current element, and the other end of the first resistor is electrically connected with the main control module;
The main control module is used for controlling the conduction state of the first pressure control flow element and the conduction state of the second pressure control flow element according to the control signal so as to control the working state of the control unit.
According to some embodiments of the invention, the master control module comprises:
The interface unit is used for acquiring the control signal;
One end of the second resistor is electrically connected with the interface unit;
One end of the third resistor is electrically connected with the other end of the second resistor, and the other end of the third resistor is electrically connected with the driving power supply;
One end of the first capacitor is electrically connected with the second resistor, and the other end of the first capacitor is electrically connected with the driving power supply;
The base electrode of the third voltage-control flow element is electrically connected with the other end of the second resistor, the emitter electrode of the third voltage-control flow element is respectively connected with the driving power supply and the ground end, and the collector electrode of the third voltage-control flow element is respectively electrically connected with the other end of the first resistor and the discharge module.
According to some embodiments of the invention, the third voltage-controlled current element comprises any one of a triode, a field effect transistor, and a relay.
According to some embodiments of the invention, the bleed module comprises:
The grid electrode of the fourth voltage-control flow element is respectively and electrically connected with the other end of the first resistor and the collector electrode of the third voltage-control flow element, and the source electrode of the fourth voltage-control flow element is respectively and electrically connected with the other end of the first capacitor and the charger;
The positive electrode of the first diode is electrically connected with the collector electrode of the second voltage-controlled current element and the voltage clamping module respectively, and the negative electrode of the first diode is electrically connected with the drain electrode of the fourth voltage-controlled current element.
According to some embodiments of the invention, the fourth voltage-controlled current element comprises any one of a triode, a field effect transistor, and a relay.
According to some embodiments of the invention, the voltage clamping module comprises:
The negative electrode of the second diode is electrically connected with the charger and the source electrode of the anti-reflection transistor respectively;
The positive electrode of the first voltage stabilizing tube is electrically connected with the positive electrode of the second diode, and the negative electrode of the first voltage stabilizing tube is electrically connected with the positive electrode of the first diode and the grid electrode of the anti-reflection transistor respectively;
The negative electrode of the third diode is electrically connected with the drain electrode of the anti-reflection transistor and the reverse connection protection module respectively;
The anode of the second voltage stabilizing tube is electrically connected with the anode of the third diode, and the cathode of the second voltage stabilizing tube is electrically connected with the grid electrode of the anti-reflection transistor and the reverse connection protection module respectively.
According to some embodiments of the invention, the reverse connection protection module comprises:
the emitter of the fifth voltage-controlled current element is electrically connected with the drain electrode of the anti-reflection transistor and the target battery respectively, and the collector of the fifth voltage-controlled current element is electrically connected with the grid electrode of the anti-reflection transistor;
and one end of the fourth resistor is electrically connected with the grid electrode of the fifth voltage-controlled current element, and the other end of the fourth resistor is electrically connected with the target battery and the charger respectively.
According to some embodiments of the invention, the circuit further comprises:
One end of the fifth resistor is electrically connected with the grid electrode of the anti-reflection transistor, and the other end of the fifth resistor is electrically connected with the negative electrode of the first voltage stabilizing tube and the negative electrode of the second voltage stabilizing tube respectively;
One end of the second capacitor is electrically connected with the charger, and the other end of the second capacitor is electrically connected with the collector electrode of the second voltage-controlled current element;
one end of the third capacitor is electrically connected with the drain electrode of the anti-reflection transistor, and the other end of the third capacitor is electrically connected with the fifth resistor and the negative electrode of the second voltage stabilizing tube respectively;
And one end of the sixth resistor is electrically connected with the charger, and the other end of the sixth resistor is electrically connected with the emitter of the third voltage-controlled current element.
A battery anti-reverse connection system according to an embodiment of the second aspect of the present invention, the system comprising:
a circuit as claimed in any one of the first aspects;
and the target battery is electrically connected with the charger.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The invention is further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a schematic diagram of a battery reverse connection preventing circuit according to an embodiment of the present invention.
Reference numerals:
charger 101, drive power supply 102, control unit 103, voltage clamp module 104, main control module 105, bleeder module 106, reverse connection protection module 107.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present invention and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a number is one or more, the meaning of a number is two or more, and greater than, less than, exceeding, etc. are understood to exclude the present number, and the meaning of a number is understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
In the description of the present invention, the descriptions of the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
At present, a reverse connection preventing circuit is arranged in a battery charging and discharging circuit so as to protect a charger and a battery. In the related art, the anti-reverse transistor gallium nitride transistor is a third generation wide bandgap semiconductor device, and has the characteristic of no body diode, so that the anti-reverse transistor gallium nitride transistor can be applied to an anti-reverse circuit. In the process of charging and discharging the battery, the voltage of the battery can change, and at the moment, the voltage of the grid electrode and the drain electrode of the anti-reverse-tube gallium nitride transistor can also change due to the relation of series voltage division, so that the conduction condition, the temperature and the service life of the anti-reverse-tube gallium nitride transistor are influenced, and the performance of an anti-reverse-connection circuit is further influenced.
Based on the above, the embodiment of the application provides a battery reverse connection prevention circuit and a system, which can realize constant gate-drain voltage of a reverse connection prevention gallium nitride transistor and provide stability for reverse connection protection of a battery under the condition that the voltage of the battery changes.
The battery reverse connection preventing circuit provided by the embodiment of the application is described below.
Referring to fig. 1, an embodiment of the present application provides a battery anti-reverse connection circuit. The circuit comprises a charger 101, an anti-reverse transistor, a constant current source module, a voltage clamping module 104, a main control module 105, a bleeder module 106 and a reverse connection protection module 107. The charger 101 is used to supply a charging power source to a target battery. The anti-reflection transistor is electrically connected to the charger 101. The constant current source module comprises a driving power supply 102 and a control unit 103, wherein the driving power supply 102 is connected with the control unit 103, and the control unit 103 is electrically connected with the anti-reflection transistor. The voltage clamp module 104 is electrically connected to the charger 101, the control unit 103, and the anti-reflection transistor, respectively. The voltage clamping module 104 is configured to perform a voltage clamping operation on the anti-reflection transistor so as to make the anti-reflection transistor constant voltage. The main control module 105 is electrically connected with the driving power supply 102 and the control unit 103, and the main control module 105 is used for controlling the working state of the control unit 103 according to the control signal. The anti-reflection transistor is used for being turned on or turned off according to the working state and the driving voltage provided by the driving power supply 102. The bleeder module 106 is electrically connected with the main control module 105, the control unit 103, the voltage clamping module 104, the charger 101 and the anti-reflection transistor respectively. The main control module 105 is further configured to control the bleeder module 106 to perform bleeder operation on the anti-reflection transistor according to the control signal. The reverse connection protection module 107 is electrically connected to the voltage clamp module 104 and the charger 101, and the reverse connection protection module 107 is also electrically connected to the target battery. The reverse connection protection module 107 is configured to perform a reverse connection protection operation on the target battery.
Specifically, the charger 101 is configured to supply a charging power to a target battery (i.e., BAT 1), and the voltage of the target battery changes during charging or discharging of the target battery. Since the anti-reflection transistor (i.e. the anti-reflection gallium nitride transistor, M1) is connected in series with the target battery, the voltage of the gate-drain of the anti-reflection transistor will also change, thereby affecting the turn-on condition, temperature, lifetime and the like of the anti-reflection transistor, and further affecting the performance of the battery anti-reverse circuit. Based on this, in the embodiment of the present application, a constant current source module, a voltage clamp module 104, a bleeder module 106, a main control module 105, and a reverse connection protection module 107 are provided. The charger 101 is a bidirectional DC-DC power supply (i.e., bidirectional DC-DC power supply), and the charger 101, the voltage clamping module 104, the anti-reverse transistor, and the target battery are sequentially connected in series to form a charging loop for the target battery. The main control module 105 is configured to acquire a control signal, which may be used as a signal indicating whether the target battery is to be charged. The main control module 105 is used for being turned on or off according to the control signal, so as to influence the working state of the control unit 103 electrically connected with the main control module 105. The control unit 103 is electrically connected to the driving power supply 102, and the driving power supply 102 is used for providing a driving voltage for the anti-reflection transistor. When the on state of the control unit 103 changes, the paths of the driving power supply 102 and the anti-reflection transistor are affected, and the bleeder module 106 performs bleeder operation on the anti-reflection transistor, so that the on state of the anti-reflection transistor is affected, that is, the on or off of the anti-reflection transistor is affected. When the anti-reflection transistor is turned off, the charging power supplied from the charger 101 cannot pass through the target battery. At this time, if the target battery is connected positively, the reverse connection protection module 107 is turned off. If the target battery is reversely connected, the reverse connection protection module 107 conducts based on the current of the target battery, thereby realizing reverse connection protection of the target battery. When the anti-reflection transistor is turned on, if the target battery is connected positively, the anti-connection protection module 107 is turned off, and the charging power supply of the charger 101 charges the target battery through the anti-reflection transistor. If the target battery is reversely connected, the reverse connection protection module 107 is turned on, and the target battery cannot obtain the charging power supply, so that the protection of the target battery is realized.
It can be understood that the voltage value provided by the constant current source module is a constant value, and when the voltage of the target battery changes, the partial voltage of the components on the serial circuit of the constant current source module also changes. The voltage clamping module 104 is configured to clamp the voltage division on the series circuit to ensure that the voltage of the gate-drain of the anti-reflection transistor is constant under the above conditions, so as to ensure the driving stability of the anti-reflection transistor, that is, enable the anti-reflection transistor to be normally turned on or turned off, thereby reducing the influence on the reverse connection protection of the target battery.
According to the battery anti-reverse connection circuit provided by the embodiment of the application, the constant current source module is electrically connected with the anti-reverse transistor, the voltage clamping module 104 is used for carrying out voltage clamping operation on the anti-reverse transistor, and the bleeder module 106 is used for carrying out bleeder operation on the anti-reverse transistor, so that when the voltage of the target battery changes, the grid-drain voltage of the anti-reverse transistor can be kept constant, and thus the anti-reverse transistor can be normally turned on and off, and the stability of anti-reverse connection protection on the target battery is ensured.
In some embodiments, the control unit 103 includes a first voltage-controlled flow element Q1, a second voltage-controlled flow element Q2, and a first resistor R1. The emitter of the first voltage-controlled current element Q1 is electrically connected to the driving power source 102. The emitter of the second voltage-controlled current element Q2 is electrically connected to the driving power source 102, and the base of the second voltage-controlled current element Q2 is electrically connected to the base of the first voltage-controlled current element Q1. The collector of the second voltage-controlled current element Q2 is electrically connected to the bleeder module 106 and the voltage clamping module 104, respectively, one end of the first resistor R1 is electrically connected to the collector of the first voltage-controlled current element Q1, and the other end of the first resistor R1 is electrically connected to the main control module 105. The main control module 105 is configured to control the on state of the first voltage-controlled current element Q1 and the on state of the second voltage-controlled current element Q2 according to the control signal, so as to control the working state of the control unit 103.
Specifically, the first voltage-controlling current element Q1 and the second voltage-controlling current element Q2 may be PNP transistors. The emitter of the first voltage controlled current element Q1 and the emitter of the second voltage controlled current element Q2 may both be electrically connected to the positive electrode of the driving power source 102. The base electrode of the second voltage-controlled current element Q2 is electrically connected with the base electrode of the first voltage-controlled current element Q1 and the collector electrode of the first voltage-controlled current element Q1 respectively. The collector of the first voltage-controlled current element Q1 is further electrically connected to one end of the first resistor R1, and the other end of the first resistor R1 is electrically connected to the main control module 105. When the main control module 105 is turned on according to the control signal, the first voltage-controlling current element Q1 and the second voltage-controlling current element Q2 are both turned on, so that the voltage clamping module 104 can realize the constant voltage of the gate-drain electrode of the anti-reflection transistor according to the driving voltage provided by the driving power supply 102. When the main control module 105 is turned off according to the control signal, the first voltage-controlled current element Q1 and the second voltage-controlled current element Q2 are turned off and do not work, the anti-reflection transistor cannot acquire the driving voltage, and the voltage clamping module 104 is not operated, at this time, the anti-reflection transistor is turned off, and the target battery cannot acquire the charging power supply of the charger 101. It can be understood that, in the embodiment of the present application, the on state of the first voltage-controlling flow element Q1 and the on state of the second voltage-controlling flow element Q2 may be used as the operation states of the control unit 103.
In some embodiments, the main control module 105 includes an interface unit, a second resistor R2, a third resistor R3, a first capacitor C1, and a third voltage-controlled current element Q3. The interface unit is used for acquiring the control signal. One end of the second resistor R2 is electrically connected to the interface unit. One end of the third resistor R3 is electrically connected to the other end of the second resistor R2, and the other end of the third resistor R3 is electrically connected to the driving power source 102. One end of the first capacitor C1 is electrically connected to the second resistor R2, and the other end of the first capacitor C1 is electrically connected to the driving power source 102. The base of the third voltage-controlled current element Q3 is electrically connected with the other end of the second resistor R2, the emitter of the third voltage-controlled current element Q3 is electrically connected with the driving power supply 102 and the ground terminal respectively, and the collector of the third voltage-controlled current element Q3 is electrically connected with the other end of the first resistor R1 and the bleeder module 106 respectively.
Specifically, a control signal is acquired through the interface unit SW1, and the control signal may be used to indicate whether the target battery is to be charged. One end of the second resistor R2 is electrically connected to the interface unit SW1, and the other end of the second resistor R2 is electrically connected to one end of the third resistor R3, one end of the first capacitor C1, and the base of the third voltage-controlled current element Q3, respectively. The other end of the third resistor R3, the other end of the first capacitor C1, and the emitter of the third current steering element Q3 are all electrically connected to the negative electrode of the driving power source 102. The emitter of the third voltage-controlled current element Q3 is further connected to the ground, and the collector of the third voltage-controlled current element Q3 is further electrically connected to the first resistor R1 and the bleeder module 106, respectively. When the control signal is a low level signal (e.g., a signal indicating that the target battery is not being charged), the third voltage-controlling flow element Q3 is turned off, thereby affecting both the first voltage-controlling element and the second voltage-controlling flow element Q2 to be turned off. When the control signal is a high level signal (e.g., a signal indicating that the target battery is charged), the third voltage-controlling current element Q3 is saturated and turned on, thereby affecting both the first voltage-controlling current element Q1 and the second voltage-controlling current element to be turned on.
In some embodiments, the third voltage-controlling element Q3 may be any of switching devices such as a triode, a field effect transistor, and a relay, which is not particularly limited in this embodiment of the present application.
In some embodiments, the bleed module 106 includes a fourth controlled-pressure flow element Q4 and a first diode D1. The grid electrode of the fourth voltage-controlled current element Q4 is electrically connected to the other end of the first resistor R1 and the collector electrode of the third voltage-controlled current element Q3, and the source electrode of the fourth voltage-controlled current element Q4 is electrically connected to the other end of the first capacitor C1 and the charger 101. The positive pole of the first diode D1 is electrically connected to the collector of the second voltage-controlled current element Q2 and the voltage clamping module 104, and the negative pole of the first diode D1 is electrically connected to the drain of the fourth voltage-controlled current element Q4.
Specifically, when the control signal is a low level signal (e.g., a signal indicating that the target battery is not being charged), the third voltage-controlling current element Q3 is turned off, thereby affecting the fourth voltage-controlling current element Q4 to be turned on, so that the gate of the anti-reflection transistor is pulled to the ground by the first diode D1, and the anti-reflection transistor is turned off. When the control signal is a high level signal (e.g., a signal indicating that the target battery is charged), the third voltage-controlling flow element Q3 is saturated on, thereby affecting the fourth voltage-controlling flow element Q4 to be turned off.
In some embodiments, the fourth voltage-controlling element Q4 may be any of switching devices such as a triode, a field effect transistor, and a relay, which is not particularly limited in this embodiment of the present application.
In some embodiments, the voltage clamping module 104 includes a second diode D2, a first zener diode ZD1, a third diode D3, and a second zener diode ZD2. The negative electrode of the second diode D2 is electrically connected to the charger 101 and the source of the anti-reflection transistor, respectively. The positive pole of the first voltage stabilizing tube ZD1 is electrically connected with the positive pole of the second diode D2, and the negative pole of the first voltage stabilizing tube ZD1 is electrically connected with the positive pole of the first diode D1 and the grid electrode of the anti-reflection transistor respectively. The negative electrode of the third diode D3 is electrically connected to the drain of the anti-reflection transistor and the reverse connection protection module 107, respectively. The positive pole of the second voltage stabilizing tube ZD2 is electrically connected with the positive pole of the third diode D3, and the negative pole of the second voltage stabilizing tube ZD2 is electrically connected with the grid electrode of the anti-reflection transistor and the anti-connection protection module 107 respectively.
Specifically, the voltage clamping circuit comprises a first clamping unit arranged at the source electrode of the anti-reflection transistor and a second clamping unit arranged at the drain electrode of the anti-reflection transistor. The first clamping unit includes a second diode D2 and a first voltage regulator ZD1, and the second clamping unit includes a third diode D3 and a second voltage regulator ZD2.
In some embodiments, the reverse protection module 107 includes a fifth voltage-controlled current element Q5 and a fourth resistor R4. The emitter of the fifth voltage-controlled current element Q5 is electrically connected with the drain electrode of the anti-reflection transistor and the target battery respectively, and the collector of the fifth voltage-controlled current element Q5 is electrically connected with the grid electrode of the anti-reflection transistor. One end of the fourth resistor R4 is electrically connected to the gate of the fifth voltage-controlled current element Q5, and the other end of the fourth resistor R4 is electrically connected to the target battery and the charger 101, respectively.
The battery reverse connection preventing circuit provided by the embodiment of the application further comprises a fifth resistor R5, a second capacitor C2, a third capacitor C3 and a sixth resistor R6. One end of the fifth resistor R5 is electrically connected with the grid electrode of the anti-reflection transistor, and the other end of the fifth resistor R5 is electrically connected with the negative electrode of the first voltage stabilizing tube ZD1 and the negative electrode of the second voltage stabilizing tube ZD2 respectively. One end of the second capacitor C2 is electrically connected to the charger 101, and the other end of the second capacitor C2 is electrically connected to the collector of the second voltage-controlled current element Q2. One end of the third capacitor C3 is electrically connected with the drain electrode of the anti-reflection transistor, and the other end of the third capacitor C3 is electrically connected with the fifth resistor R5 and the negative electrode of the second voltage stabilizing tube ZD2 respectively. One end of the sixth resistor R6 is electrically connected to the charger 101, and the other end of the sixth resistor R6 is electrically connected to the emitter of the third voltage-controlled current element Q3.
Specifically, when the control signal is a low level signal (e.g., a signal indicating that the target battery is not being charged), the third voltage-controlling current element Q3 is turned off, the first voltage-controlling current element Q1 and the second voltage-controlling current element Q2 are turned off, the constant current source module is not operated, the voltage clamping module 104 is not operated, the fourth voltage-controlling current element Q4 is turned on, the gate potential of the anti-reflection transistor is pulled to the ground by the first diode D1, and the anti-reflection transistor is turned off. The charging power supplied from the charger 101 cannot flow through the target battery through the output terminal. At this time, if the target battery is connected positively, the reverse connection protection module 107 is turned off. If the target battery is reversely connected, the current of the target battery flows through the fourth resistor R4 and the base electrode of the fifth voltage-controlled current element Q5, and the fifth voltage-controlled current element Q5 is turned on. The voltage of the capacitor Cgd2 of the anti-reflection transistor is discharged through the fifth resistor R5 and the collector of the fifth voltage-controlled current element Q5, and the anti-reflection transistor is turned off.
When the control signal is a high-level signal (such as a signal for charging a target battery), the third voltage-control current element Q3 is saturated and is conducted, the fourth voltage-control current element Q4 is turned off, and the first voltage-control current element Q1, the third voltage-control current element Q3 and the first resistor R1 work under constant current. The collector current of the second voltage-controlled current element Q2 flows through the fifth resistor R5, the capacitor Cgd1, the capacitor Cgd2, the second capacitor C2, the third capacitor C3, the sixth resistor R6 and the target battery, respectively, and the voltage clamping module 104 clamps the gate-drain voltage of the anti-reflection transistor, so that the anti-reflection transistor is turned on. The third capacitor C3 and the fifth resistor R5 of the second capacitor C2 adjust the rising time of the grid-drain voltage of the anti-reflection transistor so as to control the conducting speed of the anti-reflection transistor. At this time, if the target battery is connected positively, the reverse connection protection module 107 does not operate. If the target battery is reversely connected, the current of the target battery flows through the fourth resistor R4 and the base electrode of the fifth voltage-controlled current element Q5, the fifth voltage-controlled current element Q5 is turned on, the voltage of the capacitor Cgd2 of the anti-reflection transistor is discharged through the fifth resistor R5 and the collector electrode of the fifth voltage-controlled current element Q5, and the anti-reflection transistor is turned off.
According to the battery anti-reverse connection circuit provided by the embodiment of the application, through the connection relation of components in the charger 101, the anti-reverse transistor, the constant current source module, the voltage clamping module 104, the main control module 105, the bleeder module 106 and the reverse connection protection module 107, the grid-drain voltage constant current of the anti-reverse transistor is realized under the condition that the voltage of a target battery changes, the driving stability of the anti-reverse transistor is ensured, and the stability of reverse connection protection of the target battery is further realized.
The embodiment of the application also provides a battery reverse connection preventing system. The system includes a battery anti-reverse circuit as described in any of the embodiments above and a target battery electrically connected to the charger.
The specific implementation of the battery anti-reverse connection system is basically the same as the specific embodiment of the battery anti-reverse connection circuit, and is not described herein again.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention. Furthermore, embodiments of the invention and features of the embodiments may be combined with each other without conflict.
Claims (9)
1. A battery anti-reverse connection circuit, the circuit comprising:
the charger is used for providing a charging power supply for the target battery;
An anti-reflection transistor electrically connected to the charger;
the constant current source module comprises a driving power supply and a control unit, wherein the driving power supply is electrically connected with the control unit, and the control unit is electrically connected with the anti-reflection transistor; wherein the control unit includes: the emitter of the first voltage-controlled current element is electrically connected with the driving power supply; one end of the first resistor is electrically connected with the collector electrode of the first voltage-controlled current element, and the other end of the first resistor is electrically connected with the main control module;
the voltage clamping module is respectively and electrically connected with the charger, the control unit and the anti-reflection transistor, and is used for carrying out voltage clamping operation on the anti-reflection transistor so as to enable the anti-reflection transistor to have constant voltage;
The main control module is respectively and electrically connected with the driving power supply and the control unit, and is used for controlling the working state of the control unit according to a control signal, wherein the anti-reflection transistor is used for being switched on or off according to the working state and the driving voltage provided by the driving power supply; the main control module comprises: the interface unit is used for acquiring the control signal; one end of the second resistor is electrically connected with the interface unit; one end of the third resistor is electrically connected with the other end of the second resistor, and the other end of the third resistor is electrically connected with the driving power supply; one end of the first capacitor is electrically connected with the second resistor, and the other end of the first capacitor is electrically connected with the driving power supply; the base electrode of the third voltage-control flow element is electrically connected with the other end of the second resistor, the emitter electrode of the third voltage-control flow element is respectively connected with the driving power supply and the ground end, and the collector electrode of the third voltage-control flow element is respectively electrically connected with the other end of the first resistor and the discharge module;
the discharging module is electrically connected with the main control module, the control unit, the voltage clamping module, the charger and the anti-reflection transistor respectively, wherein the main control module is further used for controlling the discharging module to discharge the anti-reflection transistor according to the control signal;
the reverse connection protection module is electrically connected with the voltage clamping module and the charger respectively, and is also used for being electrically connected with the target battery, and the reverse connection protection module is used for carrying out reverse connection protection operation on the target battery.
2. The circuit of claim 1, wherein the control unit further comprises:
the emitter of the second voltage-controlled current element is electrically connected with the driving power supply, the base of the second voltage-controlled current element is electrically connected with the base of the first voltage-controlled current element, and the collector of the second voltage-controlled current element is electrically connected with the bleeder module and the voltage clamping module respectively;
The main control module is used for controlling the conduction state of the first pressure control flow element and the conduction state of the second pressure control flow element according to the control signal so as to control the working state of the control unit.
3. The circuit of claim 1, wherein the third voltage-controlled current element comprises any one of a transistor, a field effect transistor, and a relay.
4. The circuit of claim 2, wherein the bleed module comprises:
The grid electrode of the fourth voltage-control flow element is respectively and electrically connected with the other end of the first resistor and the collector electrode of the third voltage-control flow element, and the source electrode of the fourth voltage-control flow element is respectively and electrically connected with the other end of the first capacitor and the charger;
The positive electrode of the first diode is electrically connected with the collector electrode of the second voltage-controlled current element and the voltage clamping module respectively, and the negative electrode of the first diode is electrically connected with the drain electrode of the fourth voltage-controlled current element.
5. The circuit of claim 4, wherein the fourth voltage-controlled current element comprises any one of a transistor, a field effect transistor, and a relay.
6. The circuit of claim 4, wherein the voltage clamp module comprises:
The negative electrode of the second diode is electrically connected with the charger and the source electrode of the anti-reflection transistor respectively;
The positive electrode of the first voltage stabilizing tube is electrically connected with the positive electrode of the second diode, and the negative electrode of the first voltage stabilizing tube is electrically connected with the positive electrode of the first diode and the grid electrode of the anti-reflection transistor respectively;
The negative electrode of the third diode is electrically connected with the drain electrode of the anti-reflection transistor and the reverse connection protection module respectively;
The anode of the second voltage stabilizing tube is electrically connected with the anode of the third diode, and the cathode of the second voltage stabilizing tube is electrically connected with the grid electrode of the anti-reflection transistor and the reverse connection protection module respectively.
7. The circuit of claim 6, wherein the reverse protection module comprises:
the emitter of the fifth voltage-controlled current element is electrically connected with the drain electrode of the anti-reflection transistor and the target battery respectively, and the collector of the fifth voltage-controlled current element is electrically connected with the grid electrode of the anti-reflection transistor;
and one end of the fourth resistor is electrically connected with the grid electrode of the fifth voltage-controlled current element, and the other end of the fourth resistor is electrically connected with the target battery and the charger respectively.
8. The circuit of claim 7, wherein the circuit further comprises:
One end of the fifth resistor is electrically connected with the grid electrode of the anti-reflection transistor, and the other end of the fifth resistor is electrically connected with the negative electrode of the first voltage stabilizing tube and the negative electrode of the second voltage stabilizing tube respectively;
One end of the second capacitor is electrically connected with the charger, and the other end of the second capacitor is electrically connected with the collector electrode of the second voltage-controlled current element;
one end of the third capacitor is electrically connected with the drain electrode of the anti-reflection transistor, and the other end of the third capacitor is electrically connected with the fifth resistor and the negative electrode of the second voltage stabilizing tube respectively;
And one end of the sixth resistor is electrically connected with the charger, and the other end of the sixth resistor is electrically connected with the emitter of the third voltage-controlled current element.
9. A battery anti-reverse connection system, the system comprising:
A circuit as claimed in any one of claims 1 to 8;
and the target battery is electrically connected with the charger.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311181793.7A CN117118032B (en) | 2023-09-13 | 2023-09-13 | Battery reverse connection preventing circuit and battery reverse connection preventing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311181793.7A CN117118032B (en) | 2023-09-13 | 2023-09-13 | Battery reverse connection preventing circuit and battery reverse connection preventing system |
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| CN117118032A CN117118032A (en) | 2023-11-24 |
| CN117118032B true CN117118032B (en) | 2024-05-14 |
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| JP2008178248A (en) * | 2007-01-19 | 2008-07-31 | Mitsubishi Electric Corp | Drive circuit for power semiconductor element, and power conversion device |
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|---|---|
| CN117118032A (en) | 2023-11-24 |
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