CN209844585U - Pre-charging anti-ignition circuit - Google Patents
Pre-charging anti-ignition circuit Download PDFInfo
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- CN209844585U CN209844585U CN201920703636.0U CN201920703636U CN209844585U CN 209844585 U CN209844585 U CN 209844585U CN 201920703636 U CN201920703636 U CN 201920703636U CN 209844585 U CN209844585 U CN 209844585U
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Abstract
The utility model is suitable for a charging circuit provides precharge and prevent circuit of striking sparks, include: the energy storage module is connected with one end of the battery for charging and discharging; the control module is connected with the energy storage module and controls the energy storage module to charge and discharge; the pre-charging module is connected with the energy storage module and is used for pre-charging the energy storage module; the pre-charging module pre-charges the energy storage module before the battery charges and discharges the energy storage module, and then further charges the energy storage module, so that peak current can be reduced to a safe level by pre-charging the energy storage module, the peak current cannot be generated, electric sparks generated when the energy storage module is directly in mechanical contact with the battery during charging can be effectively avoided, and the safe charging of the energy storage module is realized.
Description
Technical Field
The utility model belongs to the technical field of charging circuit, especially, relate to a precharge circuit of preventing striking sparks.
Background
When the two metal conductors of the capacitor are respectively connected with the anode and the cathode of a power supply, the anode of the power supply has redundant positive charges, the cathode of the power supply has redundant negative charges, and the two metal conductors and the anode of the power supply are required to be directionally moved, so that the two poles of the capacitor have the positive charges and the negative charges on the two polar plates can attract each other, and the charges on the anode and the cathode of the power supply can be continuously directionally moved to the capacitor until a potential difference is established between the two polar plates of the capacitor to complete the charging of the capacitor.
In the existing circuit, a capacitor is generally mechanically connected with a battery for charging, but electric sparks are generated instantly when the capacitor is directly and mechanically contacted with the battery during charging, and at the moment, the charging and discharging of the capacitor can be realized by adding a control module between the battery and the capacitor and controlling the on-off of the control module.
However, at the moment of switching on and off of the control module in the charging circuit, a surge current of the input capacitor is generated, i.e., a peak current is generated, and the peak current may damage the control module, or even shorten the service life of the charging circuit.
SUMMERY OF THE UTILITY MODEL
The utility model provides a precharge circuit of preventing striking sparks aims at solving the problem of avoiding damaging charging circuit when charging to electric capacity.
The utility model relates to a realize like this, a prevent circuit of striking sparks in precharge for the protection of preventing striking sparks when the battery carries out charge-discharge to energy storage module, the circuit includes:
the energy storage module is connected with one end of the battery and used for charging and discharging;
the control module is connected with the energy storage module and controls the energy storage module to charge and discharge; and
and the pre-charging module is connected with the energy storage module and is used for pre-charging the energy storage module.
Still further, the pre-charge module includes:
the current limiting resistor is connected with the negative end of the energy storage module and is used for limiting the current of the energy storage module;
and the pre-charging control unit is connected with the current-limiting resistor and controls the energy storage module to pre-charge.
Still further, the precharge control unit includes:
the collector of the first triode is connected with the current-limiting resistor, the base of the first triode is connected to the emitter of the first triode through the fourth resistor, the emitter of the first triode is grounded, and the base of the first triode is connected to a first external signal end through the third resistor and used for receiving a pre-charging control signal for pre-charging the energy storage module.
Still further, the control module includes:
the field effect transistor is connected with the negative end of the energy storage module, and the first resistor and the second resistor are connected with the field effect transistor;
the drain electrode of the field effect transistor is connected with the negative end of the energy storage module, the grid electrode of the field effect transistor is connected to the source electrode of the field effect transistor through the second resistor, the source electrode of the field effect transistor is grounded, and the grid electrode of the field effect transistor is connected to the energy storage module through the first resistor and used for receiving a charging control signal for charging the energy storage module.
Still further, the pre-charge anti-strike circuit further includes:
and the switch module is connected with the control module and is used for controlling the on-off of the control module.
Still further, the switch module includes:
the first switch unit is connected with the control module and the battery and is used for controlling the on-off of the control module;
and the second switch unit is connected with the first switch unit and is used for controlling the on-off of the first switch unit.
Furthermore, the first switch unit comprises a second triode, a fifth resistor and a sixth resistor, wherein an emitter of the second triode is connected to the battery, a base of the second triode is connected to the emitter of the second triode through the fifth resistor, the base of the second triode is further connected to the second switch unit through the sixth resistor, and a collector of the second triode is connected to the other end of the first resistor.
Furthermore, the second switch unit comprises a third triode, a seventh resistor and an eighth resistor, wherein a collector of the third triode is connected with the sixth resistor, a base of the third triode is connected to an emitter of the third triode through the eighth resistor, the emitter of the third triode is grounded, and the base of the third triode is connected to a second external signal end through the seventh resistor and is used for receiving a charging control signal for charging the energy storage module.
Furthermore, the pre-charge module further comprises a voltage dividing resistor, and the voltage dividing resistor is connected with two ends of the energy storage module and is used for dividing voltage of the energy storage module.
The utility model discloses the beneficial effect who reaches is: the pre-charging module pre-charges the energy storage module before the battery charges and discharges the energy storage module, and then further charges the energy storage module.
Drawings
FIG. 1 is a block diagram of one embodiment of a pre-charge anti-strike circuit provided by the present invention;
fig. 2 is a schematic diagram of a specific circuit structure of a precharge module according to an embodiment of the precharge anti-strike circuit of the present invention;
fig. 3 is a schematic diagram of a specific circuit structure of a control module according to an embodiment of the pre-charging anti-ignition circuit provided by the present invention;
fig. 4 is a schematic diagram of a specific circuit structure of an embodiment of the pre-charging anti-sparking circuit provided by the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The utility model discloses precharge circuit of preventing striking sparks includes energy storage module, control module and precharge module, and the precharge module can precharge the energy storage module to predetermined voltage, avoids the direct spark that produces when charging to the energy storage module, avoids appearing the damage that peak current caused control module simultaneously, extension circuit life.
Example one
As shown in fig. 1, a precharge anti-strike circuit includes: the device comprises an energy storage module 1, a control module 2 and a pre-charging module 3, and is used for preventing sparking when a battery charges and discharges the energy storage module 1.
The energy storage module 1 is connected with one end of the battery for charging and discharging; the control module 2 is connected with the energy storage module 1 and is used for controlling the energy storage module 1 to charge and discharge; the pre-charging module 3 is connected with the energy storage module 1 and is used for pre-charging the energy storage module 1.
Specifically, the energy storage module 1 is a device capable of storing and releasing electric energy, in implementation, the energy storage module 1 may employ a capacitor C1, the battery is an external power input device, in implementation, the battery includes an output terminal VBAT, the energy storage module 1 is connected to the output terminal VBAT for charging, the pre-charging module 3 is connected to the energy storage module 1 for pre-charging the energy storage module 1, the energy storage module 1 is charged to a preset voltage level, the control module 2 is connected to the energy storage module 1 for controlling charging and discharging of the energy storage module 1, for example, the control module 2 controls on and off between the energy storage module 1 and the battery, when the battery is to charge the energy storage module 1, the pre-charging module 3 pre-charges the energy storage module 1 to a preset voltage value, and then controls the battery to further charge the energy storage module 1, at this time, because the energy storage module 1 is pre-charged, therefore, no peak current is generated during further charging, and therefore no damage is caused to the control module.
The pre-charging anti-ignition circuit comprises an energy storage module which is connected with a battery to be charged and discharged, wherein the pre-charging module can pre-charge the energy storage module before the battery charges and discharges the energy storage module, and then further charges the energy storage module.
Example two
Referring to fig. 2, fig. 2 is a schematic diagram of a partial circuit structure of an embodiment of the precharge anti-strike circuit of the present invention, and as shown in fig. 2, the precharge module 3 includes:
a current limiting resistor R10 connected with the negative end of the energy storage module 1 and used for limiting the current of the energy storage module 1;
and a pre-charging control unit connected with the current-limiting resistor R10 and used for controlling the energy storage module 1 to pre-charge.
In implementation, the pre-charge module 3 includes a pre-charge control unit and a current-limiting resistor R10, wherein the current-limiting resistor R10 is connected to a negative terminal of the energy storage module 1, taking the energy storage module 1 as a capacitor C1 as an example, the capacitor C1 includes a positive terminal V + and a negative terminal V-, wherein the positive terminal V + is connected to an output terminal VBAT of the battery, the negative terminal V-is connected to one terminal of a resistor R10, the other terminal of the resistor R10 is connected to the pre-charge control unit, the pre-charge control unit includes a first transistor Q1, a third resistor R3 and a fourth resistor R4 connected to the current-limiting resistor R10, a collector of the first transistor Q1 is connected to the current-limiting resistor R10, a base of the first transistor Q1 is connected to an emitter of the first transistor Q1 through the fourth resistor R4, an emitter of the first transistor Q1 is grounded, a base of the first transistor Q1 is connected to a first external signal terminal P1 through the third resistor R3, for receiving a precharge control signal for precharging the energy storage module 1.
In implementation, the base of the first transistor Q1 in the pre-charging module 3 is connected to the first external signal terminal P1 through the third resistor R3, when the first external signal terminal P1 is at a high level, the first transistor Q1 is turned on, at this time, the battery is grounded through the capacitor C1, the current-limiting resistor R10 and the first transistor Q1, and the current-limiting resistor R10 is used for limiting the peak current generated by the capacitor C1, so as to implement the pre-charging function of the energy storage module 1.
EXAMPLE III
As shown in fig. 3, the control module 2 includes a field effect transistor QD1 connected to the negative terminal of the energy storage module 1, and a first resistor R1 and a second resistor R2 connected to the field effect transistor QD 1; the drain electrode of field effect transistor QD1 with energy storage module 1 negative terminal is connected, the grid of field effect transistor QD1 passes through second resistance R2 is connected to the source electrode of field effect transistor QD1, the source electrode ground connection of field effect transistor QD1, the grid of field effect transistor QD1 still passes through first resistance R1 is connected to energy storage module 1 is used for receiving energy storage module 1 carries out the control signal that charges.
When the device is implemented, the device further comprises a switch module, and the switch module is connected with the control module 2 and used for controlling the on-off of the control module 2. In implementation, the switch module comprises a first switch unit and a second switch unit, and the first switch unit is connected with the control module 2 and the battery and is used for controlling the on-off of the control module 2; the second switch unit is connected with the first switch unit and used for controlling the on-off of the first switch unit. The drain of the field effect transistor QD1 in the control module 2 is connected to the negative terminal V of the capacitor C1, the gate of the field effect transistor QD1 is connected to the positive terminal V + of the capacitor C1 through the first resistor R1 and the first switch unit, the second switch unit is connected with the first switch unit, and the on-off of the field effect transistor QD1 is controlled through the first switch unit and the second switch unit, so that the charging function of the energy storage module 1 is realized.
Example four
As shown in fig. 4, the first switching unit includes a second transistor Q2, a fifth resistor R5 and a sixth resistor R6, an emitter of the second transistor Q2 is connected to the battery, a base of the second transistor Q2 is connected to an emitter of the second transistor Q2 through the fifth resistor R5, a base of the second transistor Q2 is further connected to the second switching unit through the sixth resistor R6, and a collector of the second transistor Q2 is connected to the other end of the first resistor R1.
The second switch unit comprises a third triode Q3, a seventh resistor R7 and an eighth resistor R8, a collector of the third triode Q3 is connected with the sixth resistor R6, a base of the third triode Q3 is connected to an emitter of the third triode Q3 through the eighth resistor R8, the emitter of the third triode Q3 is grounded, and a base of the third triode Q3 is connected to a second external signal end P2 through the seventh resistor R7, and is used for receiving a charging control signal for charging the energy storage module 1.
In practice, the collector of the first transistor Q1 is connected to the negative terminal V of the capacitor C1 through the current limiting resistor R10, the drain of the field effect transistor QD1 is connected to the negative terminal V, the gate of the field effect transistor QD1 is connected to the collector of the second transistor Q2 through the first resistor R1, the emitter of the second transistor Q2 is connected to the positive terminal V +, the base of the second transistor Q2 is connected to the collector of the third transistor Q3 through the sixth resistor R6, and the base of the third transistor Q3 is connected to the second external signal terminal P2 through the seventh resistor R7 for receiving the charging control signal.
In one embodiment, the pre-charging module 3 further includes a voltage dividing resistor R9, the voltage dividing resistor R9 is connected to two ends of the energy storage module 1 for dividing the voltage of the energy storage module 1, and in implementation, two ends of the voltage dividing resistor R9 are respectively connected to two ends of a capacitor C1.
The utility model discloses the circuit of striking sparks is prevented in the precharge, second external signal end P2 is the low level, make third triode Q3 close, fifth resistance R5 and sixth resistance R6 tie point are the high level, make second triode Q2 close, make first resistance R1 and second resistance R2 tie point be the low level, make field effect tube QD1 close, energy storage module 1 can't charge, electric capacity C1 can't charge promptly.
When the first external signal terminal P1 is at a high level, the first transistor Q1 is turned on, and at this time, the battery is grounded through the voltage dividing resistor R9, the current limiting resistor R10 and the first transistor Q1, the current limiting resistor R10 limits the energy storage module 1 to generate a peak current, the voltage dividing resistor R9 is a voltage dividing resistor, and the energy storage module 1 is precharged to a voltage equal to the voltage of the voltage dividing resistor R9.
First external signal end P1 is the low level, first triode Q1 closes, the high level of second external signal end P2 simultaneously, make third triode Q3 open, thereby make fifth resistance R5 and sixth resistance R6 tie point be the low level, and then make second triode Q2 open, first resistance R1 and second resistance R2 tie point are the high level, make field effect tube QD1 open, the realization is further charged energy storage module 1.
At this time, since the energy storage module 1 is precharged, a peak current is not generated during further charging, and thus the energy storage module 1 is not damaged.
The embodiment of the utility model provides a precharge anti-ignition circuit includes storage module 1, control module 2 and precharge module 3, wherein, storage module 1 is connected with the battery and is charged and discharge, and before the battery charges and discharges energy storage module 1, precharge module 3 precharges energy storage module 1, then control module 2's on-off control battery further charges energy storage module 1, because precharge module 3 precharges energy storage module 1, so when the battery further charges energy storage module 1, it can reduce peak current to safety level, can not produce peak current, can effectively avoid energy storage module 1 to charge and produce the electric spark when direct and battery mechanical contact, realize energy storage module 1's safe charging.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. A pre-charge anti-sparking circuit for anti-sparking protection when a battery is charging and discharging an energy storage module, the circuit comprising:
the energy storage module is connected with one end of the battery and used for charging and discharging;
the control module is connected with the energy storage module and controls the energy storage module to charge and discharge; and
and the pre-charging module is connected with the energy storage module and is used for pre-charging the energy storage module.
2. The pre-charge anti-strike circuit of claim 1, wherein the pre-charge module comprises:
the current limiting resistor is connected with the negative end of the energy storage module and is used for limiting the current of the energy storage module;
and the pre-charging control unit is connected with the current-limiting resistor and controls the energy storage module to pre-charge.
3. The pre-charge anti-strike circuit of claim 2, wherein the pre-charge control unit comprises:
the collector of the first triode is connected with the current-limiting resistor, the base of the first triode is connected to the emitter of the first triode through the fourth resistor, the emitter of the first triode is grounded, and the base of the first triode is connected to a first external signal end through the third resistor and used for receiving a pre-charging control signal for pre-charging the energy storage module.
4. The pre-charge anti-strike circuit of claim 1 wherein the control module comprises:
the field effect transistor is connected with the negative end of the energy storage module, and the first resistor and the second resistor are connected with the field effect transistor;
the drain electrode of the field effect transistor is connected with the negative end of the energy storage module, the grid electrode of the field effect transistor is connected to the source electrode of the field effect transistor through the second resistor, the source electrode of the field effect transistor is grounded, and the grid electrode of the field effect transistor is connected to the energy storage module through the first resistor and used for receiving a charging control signal for charging the energy storage module.
5. The pre-charge anti-strike circuit of claim 4, further comprising:
and the switch module is connected with the control module and is used for controlling the on-off of the control module.
6. The pre-charge anti-strike circuit of claim 5, wherein the switch module comprises:
the first switch unit is connected with the control module and the battery and is used for controlling the on-off of the control module;
and the second switch unit is connected with the first switch unit and is used for controlling the on-off of the first switch unit.
7. The pre-charge anti-sparking circuit according to claim 6, wherein the first switching unit includes a second transistor, a fifth resistor and a sixth resistor, an emitter of the second transistor being connected to the battery, a base of the second transistor being connected to the emitter of the second transistor through the fifth resistor, the base of the second transistor being further connected to the second switching unit through the sixth resistor, and a collector of the second transistor being connected to the other end of the first resistor.
8. The pre-charge anti-sparking circuit according to claim 7, wherein the second switching unit includes a third transistor, a seventh resistor and an eighth resistor, a collector of the third transistor is connected to the sixth resistor, a base of the third transistor is connected to an emitter of the third transistor through the eighth resistor, an emitter of the third transistor is grounded, and a base of the third transistor is connected to a second external signal terminal through the seventh resistor for receiving a charge control signal for charging the energy storage module.
9. The pre-charge anti-sparking circuit according to claim 3, characterized in that the pre-charge module further comprises a voltage dividing resistor connected to both ends of the energy storage module for dividing the voltage of the energy storage module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920703636.0U CN209844585U (en) | 2019-05-15 | 2019-05-15 | Pre-charging anti-ignition circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920703636.0U CN209844585U (en) | 2019-05-15 | 2019-05-15 | Pre-charging anti-ignition circuit |
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| Publication Number | Publication Date |
|---|---|
| CN209844585U true CN209844585U (en) | 2019-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920703636.0U Active CN209844585U (en) | 2019-05-15 | 2019-05-15 | Pre-charging anti-ignition circuit |
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| CN (1) | CN209844585U (en) |
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- 2019-05-15 CN CN201920703636.0U patent/CN209844585U/en active Active
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