CN214626448U - Charging circuit based on energy storage power supply - Google Patents
Charging circuit based on energy storage power supply Download PDFInfo
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- CN214626448U CN214626448U CN202120819012.2U CN202120819012U CN214626448U CN 214626448 U CN214626448 U CN 214626448U CN 202120819012 U CN202120819012 U CN 202120819012U CN 214626448 U CN214626448 U CN 214626448U
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Abstract
The utility model relates to a switching power supply technical field discloses a possess and float and fill and safe charging circuit based on energy storage power supply, possesses: a maintenance charging circuit for detecting a voltage value of the battery and outputting a level signal according to the voltage value; the constant current charging circuit is used for detecting the voltage value of the battery and outputting a level signal according to the voltage value; the switch circuit is used for receiving the level signal input by the constant current charging circuit. When the level signal is at a low level, the constant current charging circuit outputs a high level signal to control the switching circuit to be conducted so as to perform constant current charging on the battery; the voltage limiting floating charging circuit is used for receiving a level signal input by the maintenance charging circuit; when the level signal is high level, the voltage-limiting float charging circuit is triggered to limit the charging state of the charging current.
Description
Technical Field
The utility model relates to a switching power supply technical field, more specifically say, relate to a charging circuit based on energy storage power supply.
Background
Batteries are a common energy storage power source in electronic products. At present, a battery is charged at a constant current, namely, the current is constant, the voltage of the battery is gradually increased along with the charging process, and when the voltage of the battery terminal reaches a preset value, the constant current charging is changed into constant voltage charging, namely, the voltage is constant. However, when the conventional charging circuit fully charges the battery, the charging circuit cannot control the charging current according to the voltage saturation in the battery, and the charging frequency of the battery is reduced when the charging circuit operates for a long time, thereby affecting the service life of the battery.
Therefore, how to control the charging state of the charging current to improve the lifetime of the battery is a technical problem that needs to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, can't be according to the interior voltage saturation of battery with control charging current to the above-mentioned charging circuit of prior art, when long-time operation, lead to the battery charging number of times to reduce, and then influence the life's of battery defect, provide one kind possess float fill and safe charging circuit based on energy storage power.
The utility model provides a technical scheme that its technical problem adopted is: a charging circuit based on an energy storage power supply is constructed, and the charging circuit is provided with:
the maintenance charging circuit is configured in the charging circuit, and the input end of the maintenance charging circuit is connected with the anode of the battery and used for detecting the voltage value of the battery and outputting a level signal according to the voltage value;
the input end of the constant current charging circuit is connected with the anode of the battery and is used for detecting the voltage value of the battery and outputting a level signal according to the voltage value;
one input end of the switch circuit is connected with the output end of the power supply, and the other input end of the switch circuit is coupled to the output end of the constant current charging circuit and used for receiving the level signal input by the constant current charging circuit;
when the level signal is at a low level, the constant current charging circuit outputs a high level signal to control the switching circuit to be conducted so as to perform constant current charging on the battery;
the input end of the voltage limiting floating charging circuit is connected with the output end of the maintenance charging circuit and is used for receiving the level signal input by the maintenance charging circuit;
when the level signal is at a high level, the voltage-limiting floating charge circuit is triggered to limit the charging state of the charging current.
In some embodiments, the switching circuit includes a first transistor and a second transistor,
the base electrode of the first triode is coupled with the output end of the constant current charging circuit,
the emitting electrode of the first triode is connected with the power output end,
the emitter of the second triode is connected with the base of the first triode,
the base electrode of the second triode is connected with the output end of the constant current charging circuit through a second resistor,
and the collector electrodes of the first triode and the second triode are respectively connected with the anode of the battery.
In some embodiments, the first transistor and the second transistor are PNP transistors.
In some embodiments, the constant current charging circuit includes a first comparator and a third transistor,
the inverting terminal of the first comparator is connected to the positive electrode of the battery,
the in-phase end of the first comparator is connected with the adjusting end of the adjustable resistor,
the base of the third triode is coupled with the output end of the first comparator,
the collector of the third transistor is coupled to the base of the first transistor,
and the emitter of the third triode is connected with the common end.
In some embodiments, the third transistor is an NPN transistor.
In some embodiments, the voltage limiting float circuit includes a second comparator,
the non-inverting terminal of the second comparator is coupled to the output terminal of the maintenance charging circuit,
the inverting terminal of the second comparator is connected to the negative electrode of the battery through an eleventh resistor,
and the output end of the second comparator is connected with the output end of the power supply.
In some embodiments, the maintenance charging circuit includes a third comparator and a fourth transistor,
the non-inverting terminal of the third comparator is coupled to the positive terminal of the battery,
the inverting terminal of the third comparator is connected with one end of the adjustable resistor,
a base of the fourth transistor is coupled to an output terminal of the third comparator,
the collector of the fourth triode is connected with the output end of the voltage stabilizing circuit through an eighth resistor,
and the emitter of the fourth triode is connected with the inverting terminal of the second comparator.
In some embodiments, the fourth transistor is an NPN transistor.
The charging circuit based on the energy storage power supply comprises a maintenance charging circuit, a constant current charging circuit, a switch circuit and a voltage-limiting floating charging circuit, wherein the maintenance charging circuit is used for detecting the voltage value of a battery and outputting a level signal according to the voltage value; the switch circuit is used for controlling the constant-current charging state of the battery, and the input end of the voltage-limiting floating charging circuit is connected with the output end of the maintenance charging circuit and used for receiving a level signal input by the maintenance charging circuit; when the level signal is high level, the voltage-limiting float charging circuit is triggered to limit the charging state of the charging current. Compared with the prior art, through setting up the maintenance charging circuit and the voltage limiting float charging circuit, when the battery is close to full charge, the maintenance charging circuit outputs the level for triggering the voltage limiting float charging circuit to work according to the voltage value of the battery, so that the charging circuit automatically shifts to the voltage limiting float charging state, the charging current is gradually reduced from the rapid charging state, and the problem that when the existing charging circuit fully charges the battery, the charging circuit can not control the charging current according to the voltage saturation in the battery, the charging frequency of the battery is reduced, and further the service life of the battery is influenced can be effectively solved.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a schematic circuit diagram of an embodiment of a charging circuit based on an energy storage power source.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, in the first embodiment of the charging circuit based on the energy storage power supply of the present invention, the charging circuit 100 based on the energy storage power supply includes a constant current charging circuit 101, a voltage limiting floating charging circuit 102, a maintenance charging circuit 103, a switch circuit 104, and a charging indication circuit 105.
The constant current charging circuit 101 is used to control the on/off state of the switch circuit 104 to control the charging process of the battery.
The voltage-limiting float charging circuit 102 is used for controlling the charging current of the battery. Specifically, when the battery is nearly fully charged, the charging circuit automatically switches to a voltage-limited float charging state (the voltage-limited float charging voltage is set to 13.8V, if the voltage is 6V, the float charging voltage should be set to 6.9V), the charging current at this time gradually decreases from the fast charging state until the battery is fully charged, and the charging current is only 10-30mA to supplement the electric quantity lost by the self-discharge of the battery.
The maintenance charging circuit 103 is used to detect the voltage value of the battery.
The switching circuit 104 is used to control the charging state of the power supply to the battery.
Specifically, the maintenance charging circuit 103 is configured in the charging circuit, and an input terminal of the maintenance charging circuit 103 is connected to an anode (corresponding to the BAT + terminal) of the battery, and is configured to detect a voltage value at the anode (corresponding to the BAT + terminal) of the battery, and output a level signal (i.e., a high level signal or a low level signal) to the voltage limiting float charging circuit 102 according to the acquired voltage value.
The input terminal of the constant current charging circuit 101 is connected to the positive electrode (corresponding to the BAT + terminal) of the battery, and is configured to detect a voltage value of the battery and output a level signal (i.e., a high level signal or a low level signal) to the switching circuit 104 according to the acquired voltage value.
One input end of the switch circuit 104 is connected to an output end of the power supply (corresponding to the cathode ends of the first diode VD101 and the second diode VD 102), and the other input end of the switch circuit 104 is connected to the output end of the constant current charging circuit 101, and is configured to receive a level signal (i.e., a high level signal or a low level signal) input by the constant current charging circuit 101.
When the level signal is at a low level, the constant current charging circuit 101 outputs a high level signal to control the switching circuit 104 to be switched on, so as to perform constant current charging on the battery;
when the level signal is at a high level, the constant current charging circuit 101 outputs a low level signal, the switching circuit 104 is turned off, and the constant current charging of the battery is stopped.
Further, an input terminal of the voltage limiting float charging circuit 102 is connected to an output terminal of the maintenance charging circuit 103, and is configured to receive a level signal (i.e., a high level signal or a low level signal) input by the maintenance charging circuit 103.
When the level signal is low level, the voltage-limiting floating charge circuit 102 is in a standby state, and the constant current charge circuit 101 charges the battery continuously with constant current;
when the level signal is high, the voltage-limiting float circuit 102 is triggered to limit the charging state of the charging current.
Specifically, as the continuous constant current charging is continued, the voltage of the positive electrode of the battery gradually increases, and when the voltage of the battery exceeds 9V, the charging circuit shifts to a current fast charging mode, that is, the charging circuit charges the battery to output a constant charging current.
When the battery is nearly fully charged, the charging circuit automatically changes into a voltage-limiting floating charging state, and the charging current at the moment gradually decreases from a quick charging state (namely trickle charging) until the battery is fully charged.
By using the technical scheme, the voltage-limiting floating charge circuit 102 and the maintenance charge circuit 103 are arranged, when the battery is close to full charge, the maintenance charge circuit 103 outputs the level for triggering the voltage-limiting floating charge circuit 102 to work according to the voltage value of the battery, so that the charge circuit automatically changes into the voltage-limiting floating charge state, the charge current is gradually reduced (namely trickle charge) from the quick charge state, and the problems that when the existing charge circuit charges the battery fully, the charge circuit cannot control the charge current according to the voltage saturation in the battery, the charge frequency of the battery is reduced, and the service life of the battery is further influenced can be effectively solved.
In some embodiments, in order to improve the performance of the charging circuit, a first transistor VT101 and a second transistor VT102 may be disposed in the switching circuit 104, wherein the first transistor VT101 and the second transistor VT102 are PNP transistors, and both have a switching function.
Specifically, the base of the first transistor VT101 is connected to the output terminal of the constant current charging circuit 101 through the fourth capacitor C104, and the emitter of the first transistor VT101 is connected to the power output terminal.
The emitter of the second transistor VT102 is connected to the base of the first transistor VT101,
the base of the second triode VT102 is connected to the output terminal of the constant current charging circuit 101 through the second resistor R102, and the collectors of the first triode VT101 and the second triode VT102 are respectively connected to the positive electrode (corresponding to BAT + terminal) of the battery.
That is, the AC220V power supply is stepped down by the transformer TR101, and then rectified by the rectifying diode (corresponding to the diodes VD101-VD103), and divided into two paths of outputs, one of which is output to the voltage stabilizing circuit, wherein the voltage output by the voltage stabilizing circuit is + SV; the other end is output to the switch circuit 104 and the voltage-limiting float circuit 102.
In some embodiments, in order to improve the safety of battery charging, a first comparator U1A and a third transistor VT103 may be disposed in the constant current charging circuit 101, wherein the comparator is a circuit that compares an analog voltage signal with a reference signal and outputs a high level or low level signal according to the comparison result.
The third transistor VT103 is an NPN transistor, which has a switching function.
Specifically, the inverting terminal (corresponding to pin 6) of the first comparator U1A is connected to the positive electrode (corresponding to BAT + terminal) of the battery through the fifth resistor R105, the eighteenth resistor R118 and the seventeenth resistor R117 connected in series, that is, the voltage signal (or voltage value) output from the positive electrode (corresponding to BAT + terminal) of the battery is input to the inverting terminal (corresponding to pin 6) of the first comparator U1A through the seventeenth resistor R117, the eighteenth resistor R118 and the fifth resistor R105.
The in-phase end (corresponding to the 7 pins) of the first comparator U1A is connected to the adjustment end of the adjustable resistor RV101, wherein the voltage signal output by the adjustment end of the adjustable resistor RV101 is a reference signal.
The base of the third transistor VT103 is connected to the cathode of the fourth diode VD104, and the output terminal of the first comparator U1A is coupled to the anode of the fourth diode VD 104.
The collector of the third transistor VT103 is coupled to the base of the first transistor VT101, and the emitter of the third transistor VT103 is connected to the common terminal.
That is, the first comparator U1A compares the voltage value of the positive electrode (corresponding to BAT + terminal) of the battery with the voltage signal of the adjustable resistor RV101, and when the voltage of the non-inverting terminal (corresponding to pin 7) of the first comparator U1A is higher than the voltage of the inverting terminal (corresponding to pin 6), the first comparator U1A outputs a high level, otherwise, it outputs a low level.
In some embodiments, in order to increase the charging frequency and the service life of the battery, the voltage limiting floating charge circuit 102 may be provided with a second comparator U1B, a tenth resistor R110 and a sixth capacitor C106.
Specifically, the non-inverting terminal (corresponding to pin 11) of the second comparator U1B is coupled to the output terminal of the maintenance charging circuit 103,
the inverting terminal (corresponding to pin 10) of the second comparator U1B is connected to the negative electrode (corresponding to BAT-terminal) of the battery through the eleventh resistor R111, the output terminal of the second comparator U1B is connected to the output terminal of the power supply, and the output terminal of the second comparator U1B is further connected to the negative electrode (corresponding to BAT-terminal) of the battery through the tenth resistor R110 and the sixth capacitor C106 connected in parallel.
In some embodiments, in order to improve the performance of the charging circuit, a third comparator U1C and a fourth transistor VT104 may be disposed in the maintenance charging circuit 103, wherein the fourth transistor VT104 is an NPN transistor having a switching function.
Specifically, the in-phase terminal (corresponding to pin 9) of the third comparator U1C is connected to the positive electrode (corresponding to BAT + terminal) of the battery, the inverting terminal (corresponding to pin 8) of the third comparator U1C is connected to one terminal of the adjustable resistor RV101, wherein the voltage signal output by the adjustable resistor RV101 is a reference signal,
the base of the fourth transistor VT104 is coupled to the output terminal of the third comparator U1C,
the collector of the fourth transistor VT104 is connected to the output terminal (corresponding to the +8V terminal) of the voltage regulator circuit through a ninth resistor R109,
the emitter of the fourth transistor VT104 is connected to the non-inverting terminal (corresponding to pin 11) of the second comparator U1B.
That is, the third comparator U1C compares the voltage value of the positive electrode (corresponding to BAT + terminal) of the battery with the voltage signal of the adjustable resistor RV101, and when the voltage of the non-inverting terminal (corresponding to pin 11) of the third comparator U1C is higher than the voltage of the inverting terminal (corresponding to pin 8), the third comparator U1C outputs a high level, otherwise, it outputs a low level.
It should be noted that the voltage stabilizing circuit includes a controller U101, a first capacitor C101, and a second capacitor C102, and the controller U101 stabilizes and filters an input voltage and outputs the voltage.
In some embodiments, a charge indication circuit 105 is also included for displaying a prompt while the battery is charging.
Specifically, the charge indication circuit 105 includes a fourth comparator U1D, a sixteenth resistor R116, and a light emitting diode LED1, wherein during constant current charging, the +8V voltage is passed through the light emitting diode LED1, the light emitting diode LED1 is turned on, and after the charge circuit enters a floating charge state, the light emitting diode LED1 is turned off, indicating that the charge is completed.
Specifically, when the voltage of the battery is low (for example, preset below 9V), the charging circuit operates in a current constant-current charging state, and the operating principle is that the potential of the non-inverting terminal (corresponding to pin 9) of the third comparator U1C is lower than that of the inverting terminal (corresponding to pin 8), the third comparator U1C outputs a low level, and the fourth transistor VT104 is turned off. The potential of the non-inverting terminal (corresponding to the 11 pins) of the second comparator U1B is about 0.18V, and the charging current is about 600mA at this time, and at this time, the constant current charging circuit 101 performs constant current charging on the battery.
With the continuous charging, the battery voltage gradually rises, when the battery voltage exceeds 9V, the charging circuit shifts to a large-current fast charging mode, the potential of the in-phase end (corresponding to pin 9) of the third comparator U1C is higher than that of the anti-phase end (corresponding to pin 8), the third comparator U1C outputs a high-level signal, the fourth triode VT104 is triggered to be conducted, the potential of the in-phase end (corresponding to pin 11) of the second comparator U1B is about 0.48V, and the charging circuit constantly outputs about 1A current to charge the battery.
When the battery is close to full charge, the charger automatically shifts to the voltage-limiting float charging state (the voltage-limiting float charging voltage is set to 13.8V, if the voltage is 6V, the float charging voltage is set to 6.9V), and the charging current at the moment gradually drops from the quick charging state until the battery is fully charged.
While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (8)
1. A charging circuit based on an energy storage power supply is characterized by comprising:
the maintenance charging circuit is configured in the charging circuit, and the input end of the maintenance charging circuit is connected with the anode of the battery and used for detecting the voltage value of the battery and outputting a level signal according to the voltage value;
the input end of the constant current charging circuit is connected with the anode of the battery and is used for detecting the voltage value of the battery and outputting a level signal according to the voltage value;
one input end of the switch circuit is connected with the output end of the power supply, and the other input end of the switch circuit is coupled to the output end of the constant current charging circuit and used for receiving the level signal input by the constant current charging circuit;
when the level signal is at a low level, the constant current charging circuit outputs a high level signal to control the switching circuit to be conducted so as to perform constant current charging on the battery;
the input end of the voltage limiting floating charging circuit is connected with the output end of the maintenance charging circuit and is used for receiving the level signal input by the maintenance charging circuit;
when the level signal is at a high level, the voltage-limiting floating charge circuit is triggered to limit the charging state of the charging current.
2. The energy storage power supply-based charging circuit according to claim 1,
the switch circuit comprises a first triode and a second triode,
the base electrode of the first triode is coupled with the output end of the constant current charging circuit,
the emitting electrode of the first triode is connected with the power output end,
the emitter of the second triode is connected with the base of the first triode,
the base electrode of the second triode is connected with the output end of the constant current charging circuit through a second resistor,
and the collector electrodes of the first triode and the second triode are respectively connected with the anode of the battery.
3. The energy storage power supply-based charging circuit of claim 2,
the first triode and the second triode are PNP type triodes.
4. The energy storage power supply-based charging circuit of claim 2,
the constant current charging circuit comprises a first comparator and a third triode,
the inverting terminal of the first comparator is connected to the positive electrode of the battery,
the in-phase end of the first comparator is connected with the adjusting end of the adjustable resistor,
the base of the third triode is coupled with the output end of the first comparator,
the collector of the third transistor is coupled to the base of the first transistor,
and the emitter of the third triode is connected with the common end.
5. The energy storage power supply-based charging circuit according to claim 4,
the third triode is an NPN triode.
6. The energy storage power supply-based charging circuit according to claim 1,
the voltage-limiting float charging circuit comprises a second comparator,
the non-inverting terminal of the second comparator is coupled to the output terminal of the maintenance charging circuit,
the inverting terminal of the second comparator is connected to the negative electrode of the battery through an eleventh resistor,
and the output end of the second comparator is connected with the output end of the power supply.
7. The energy storage power supply-based charging circuit according to claim 6,
the maintenance charging circuit comprises a third comparator and a fourth triode,
the non-inverting terminal of the third comparator is coupled to the positive terminal of the battery,
the inverting terminal of the third comparator is connected with one end of the adjustable resistor,
a base of the fourth transistor is coupled to an output terminal of the third comparator,
the collector of the fourth triode is connected with the output end of the voltage stabilizing circuit through an eighth resistor,
and the emitter of the fourth triode is connected with the inverting terminal of the second comparator.
8. The energy storage power supply-based charging circuit according to claim 7,
the fourth triode is an NPN triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120819012.2U CN214626448U (en) | 2021-04-20 | 2021-04-20 | Charging circuit based on energy storage power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120819012.2U CN214626448U (en) | 2021-04-20 | 2021-04-20 | Charging circuit based on energy storage power supply |
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| Publication Number | Publication Date |
|---|---|
| CN214626448U true CN214626448U (en) | 2021-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120819012.2U Active CN214626448U (en) | 2021-04-20 | 2021-04-20 | Charging circuit based on energy storage power supply |
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2021
- 2021-04-20 CN CN202120819012.2U patent/CN214626448U/en active Active
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