CN213782893U - Pulse charging circuit - Google Patents
Pulse charging circuit Download PDFInfo
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- CN213782893U CN213782893U CN202022050179.5U CN202022050179U CN213782893U CN 213782893 U CN213782893 U CN 213782893U CN 202022050179 U CN202022050179 U CN 202022050179U CN 213782893 U CN213782893 U CN 213782893U
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Abstract
The utility model relates to a battery charging circuit and discloses a pulse charging circuit, which comprises a first field effect transistor, a second field effect transistor and a rapid turn-off control circuit; the source electrode of the first field effect transistor is connected with a tap of a secondary coil of the transformer, the grid electrode of the first field effect transistor is connected with the driving output end of the quick turn-off control circuit, and the drain electrode of the first field effect transistor is connected with the drain electrode of the second field effect transistor through an inductor; the grid of the second field effect transistor is used for inputting the PWM signal, and the source thereof outputs a pulse signal through a resistor. Therefore, the utility model discloses an adopt quick turn-off control circuit, can be when voltage anomaly appears, control pulse charging circuit's break-make.
Description
Technical Field
The utility model relates to a battery charging circuit technique especially relates to a pulse charging circuit.
Background
Although the charging speed is high, a blocking counter potential is generated on the charging current due to the physical characteristics of the lithium battery, and a part of the charging current is converted into heat energy in order to offset the counter potential generated by the battery; therefore, the pulse current with large amplitude can enable the lithium battery to generate large heat instantly, more electric energy can be converted into heat energy when the charging current is larger, the temperature of the lithium battery is higher, and the service life of the lithium battery can be shortened even if the lithium battery is improperly controlled, and even the danger of explosion can be caused. If the lithium battery charging system is applied to the lithium battery charging process without limitation, serious potential safety hazard is caused. Therefore, it is necessary to design a stable and controllable pulse charging circuit.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned deficiencies of the prior art, the object of the present invention is to: a stable and controllable pulse charging circuit is provided.
In order to realize the purpose of the utility model, the utility model provides a following technical scheme:
a pulse charging circuit, comprising:
a first field effect transistor;
the second field effect transistor and the quick turn-off control circuit;
the source electrode of the first field effect transistor is connected with a tap of a secondary coil of the transformer, the grid electrode of the first field effect transistor is connected with the driving output end of the quick turn-off control circuit, and the drain electrode of the first field effect transistor is connected with the drain electrode of the second field effect transistor through an inductor; the grid electrode of the second field effect transistor is used for inputting a PWM signal, and the source electrode of the second field effect transistor outputs a pulse signal through a resistor.
According to a specific implementation mode, in the pulse charging circuit of the present invention, the fast turn-off control circuit includes a fast turn-off controller chip, a voltage regulator tube, a resistor and a capacitor; the driving end of the quick turn-off controller chip is respectively connected with one end of the capacitor and the cathode of the voltage regulator tube; the grid electrode of the first field effect transistor is respectively connected with the other end of the capacitor, one end of the resistor and the anode of the voltage stabilizing tube; the other end of the resistor is connected to the source electrode of the first field effect transistor.
Furthermore, the pulse charging circuit of the utility model also comprises a power supply circuit for supplying power to the fast turn-off controller chip; further, the power supply circuit includes: the second diode, the second resistor, the second capacitor and the third capacitor; the anode of the second diode is connected with one tap of the secondary coil of the transformer, and the cathode of the second diode is connected with one end of a second resistor; the other end of the second resistor is connected with the power supply input end of the quick turn-off controller chip; after the second capacitor and the third capacitor are connected in parallel, one end of the second capacitor is connected with the power supply input end of the quick turn-off controller chip, and the other end of the second capacitor is respectively connected with the other tap of the secondary coil of the transformer and the reference input end of the quick turn-off controller chip.
According to a specific embodiment, the pulse charging circuit of the present invention further comprises a first capacitor and a first resistor; and the source electrode of the first field effect transistor is connected with the drain electrode thereof through the first capacitor and the first resistor in sequence.
According to a specific implementation mode, the utility model discloses an among the pulse charging circuit, there is electric capacity respectively at the both ends of inductance, just the equal ground connection of electric capacity that the inductance both ends are connected.
Compared with the prior art, the beneficial effects of the utility model are that:
in the pulse charging circuit of the utility model, a first field effect transistor, a second field effect transistor and a rapid turn-off control circuit are arranged; the source electrode of the first field effect transistor is connected with a tap of a secondary coil of the transformer, the grid electrode of the first field effect transistor is connected with the driving output end of the quick turn-off control circuit, and the drain electrode of the first field effect transistor is connected with the drain electrode of the second field effect transistor through an inductor; the grid of the second field effect transistor is used for inputting the PWM signal, and the source thereof outputs a pulse signal through a resistor. Therefore, the utility model discloses an adopt quick turn-off control circuit, can be when voltage anomaly appears, control pulse charging circuit's break-make.
Drawings
Fig. 1 is a schematic diagram of an application of the pulse charging circuit of the present invention;
fig. 2 is a circuit diagram of the pulse charging circuit of the present invention.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.
As shown in fig. 1, the utility model discloses a pulse charging circuit is when using, and the commercial power carries out the rectification through input rectifier module, and the commercial power after the rectification inserts to the first taking a percentage of the primary coil of transformer to form the primary coil return circuit. A pulse charging circuit is connected to one tap of the secondary coil of the transformer and forms a secondary coil loop. The PWM signal is input to the pulse charging circuit to drive the pulse charging circuit to work.
As shown in fig. 2, the pulse charging circuit of the present invention includes:
a first field effect transistor Q2;
a second field effect transistor Q6, and a quick turn-off control circuit;
the source of the first field effect transistor Q2 is connected with the tap of the secondary coil of the transformer T1, the gate thereof is connected with the driving output end of the fast turn-off control circuit, and the drain thereof is connected with the drain of the second field effect transistor Q6 through an inductor L2; the gate of the second fet Q6 is used for inputting the PWM signal, and the source thereof outputs the pulse signal through a resistor R28.
Specifically, the fast turn-off control circuit comprises a fast turn-off controller chip Q4, a voltage regulator tube D2, a resistor R3 and a capacitor C4; moreover, the driving end of the fast turn-off controller chip Q4 is respectively connected with one end of the capacitor C4 and the cathode of the voltage regulator tube D2; the grid of the first field effect transistor Q2 is respectively connected with the other end of the capacitor C4, one end of the resistor R3 and the anode of the voltage regulator tube D2; the other end of the resistor R3 is connected to the source of the first field effect transistor Q2.
Furthermore, the pulse charging circuit of the present invention further comprises a power supply circuit for supplying power to the fast turn-off controller chip Q4; specifically, the power supply circuit includes: a second diode D10, a second resistor R14, a second capacitor C40 and a third capacitor C41; the anode of the second diode D10 is connected to a tap of the secondary winding of the transformer T1, and the cathode thereof is connected to one end of a second resistor RR 14; the other end of the second resistor R14 is connected with the power supply input end of the quick turn-off controller chip Q4; after being connected in parallel with the third capacitor C41, the second capacitor C40 has one end connected to the power supply input terminal of the fast turn-off controller chip Q4, and has the other end connected to the other tap of the secondary winding of the transformer T1 and the reference input terminal of the fast turn-off controller chip Q4.
In practical application, the pulse charging circuit of the present invention further includes a first capacitor C2 and a first resistor R13; the source of the first field effect transistor Q2 is connected to the drain thereof through the first capacitor C2 and the first resistor R13 in sequence.
Furthermore, in the pulse charging circuit of the present invention, the two ends of the inductor L2 are respectively provided with capacitors C7, C8, C10 and C12, and the capacitors connected to the two ends of the inductor L2 are all grounded.
Claims (5)
1. A pulse charging circuit, comprising:
a first field effect transistor;
the second field effect transistor and the quick turn-off control circuit;
the source electrode of the first field effect transistor is connected with a tap of a secondary coil of the transformer, the grid electrode of the first field effect transistor is connected with the driving output end of the quick turn-off control circuit, and the drain electrode of the first field effect transistor is connected with the drain electrode of the second field effect transistor through an inductor; the grid electrode of the second field effect transistor is used for inputting a PWM signal, and the source electrode of the second field effect transistor outputs a pulse signal through a resistor.
2. The pulse charging circuit of claim 1, wherein said fast turn-off control circuit comprises a fast turn-off controller chip, a voltage regulator tube, a resistor, and a capacitor; the driving end of the quick turn-off controller chip is respectively connected with one end of the capacitor and the cathode of the voltage regulator tube; the grid electrode of the first field effect transistor is respectively connected with the other end of the capacitor, one end of the resistor and the anode of the voltage stabilizing tube; the other end of the resistor is connected to the source electrode of the first field effect transistor.
3. The pulse charging circuit of claim 2, further comprising a power supply circuit for supplying power to said fast turn-off controller chip; further, the power supply circuit includes: the second diode, the second resistor, the second capacitor and the third capacitor; the anode of the second diode is connected with one tap of the secondary coil of the transformer, and the cathode of the second diode is connected with one end of a second resistor; the other end of the second resistor is connected with the power supply input end of the quick turn-off controller chip; after the second capacitor and the third capacitor are connected in parallel, one end of the second capacitor is connected with the power supply input end of the quick turn-off controller chip, and the other end of the second capacitor is respectively connected with the other tap of the secondary coil of the transformer and the reference input end of the quick turn-off controller chip.
4. The pulse charging circuit of claim 1, further comprising a first capacitor and a first resistor; and the source electrode of the first field effect transistor is connected with the drain electrode thereof through the first capacitor and the first resistor in sequence.
5. The pulse charging circuit of claim 1, wherein a capacitor is disposed across said inductor, and wherein said capacitors connected across said inductor are grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022050179.5U CN213782893U (en) | 2020-09-18 | 2020-09-18 | Pulse charging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022050179.5U CN213782893U (en) | 2020-09-18 | 2020-09-18 | Pulse charging circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213782893U true CN213782893U (en) | 2021-07-23 |
Family
ID=76905112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022050179.5U Active CN213782893U (en) | 2020-09-18 | 2020-09-18 | Pulse charging circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213782893U (en) |
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2020
- 2020-09-18 CN CN202022050179.5U patent/CN213782893U/en active Active
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