CN220382797U - Power supply circuit and power supply device - Google Patents
Power supply circuit and power supply device Download PDFInfo
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- CN220382797U CN220382797U CN202321970398.2U CN202321970398U CN220382797U CN 220382797 U CN220382797 U CN 220382797U CN 202321970398 U CN202321970398 U CN 202321970398U CN 220382797 U CN220382797 U CN 220382797U
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Abstract
The utility model discloses a power supply circuit, comprising: the output end of the switching power supply is connected with the input end of the switching circuit and the input end of the charging circuit; the voltage setting circuit is connected with the input end of the charging circuit; the current setting circuit is connected with the input end of the charging circuit; the output end of the charging circuit is connected with the input end of the battery pack; the output end of the battery pack is connected with the input end of the switching circuit; the input end of the main control circuit is connected with the output end of the switching power supply and the output end of the battery pack, and the output end of the main control circuit is connected with the input end of the switching circuit; and the output end of the switching circuit is connected with an external system. The switching circuit is used for realizing the switching of the switching power supply and the battery pack, and a circuit is not required to be independently arranged for supplying power to an external system, so that the structure of the power supply circuit is simplified; meanwhile, the voltage setting circuit and the current setting circuit are used for setting voltage and current values required by the battery packs, so that the charging requirements of different battery packs are met, and the service efficiency of the power supply circuit is improved. The utility model also discloses a power supply device comprising the power supply circuit.
Description
Technical Field
The present utility model relates to the field of power supply technologies, and in particular, to a power supply circuit and a power supply device.
Background
In the prior art, a power supply circuit for supplying power to an external system is often provided with a switch power supply and a battery pack, the battery pack is charged through the switch power supply, and because the voltage values output by the switch power supply and the battery pack are different, different circuits are required to be arranged for the switch power supply and the battery pack to supply power to the external system, so that the whole power supply circuit has a complex structure; meanwhile, when the battery pack is charged through the switching power supply, the charging circuit is required to convert the voltage output by the switching power supply and then output the converted voltage to the battery pack, however, the voltage converted by the charging circuit cannot meet the charging requirements of the battery packs of multiple types, and the service efficiency of the power supply circuit is reduced.
Disclosure of Invention
In view of this, it is necessary to provide a power supply circuit and a power supply device in order to solve the above-described problems.
A power supply circuit, comprising:
the output end of the switching power supply is connected with the input end of the switching circuit and the input end of the charging circuit, and is used for providing a first voltage for the switching circuit and the charging circuit;
the input end of the voltage setting circuit receives a set voltage value, and the output end of the voltage setting circuit is connected with the input end of the charging circuit and is used for outputting the voltage value to the charging circuit;
the input end of the current setting circuit receives a set current value, and the output end of the current setting circuit is connected with the input end of the charging circuit and is used for outputting the current value to the charging circuit;
the output end of the charging circuit is connected with the input end of the battery pack, and is used for receiving the first voltage, the voltage value and the current value and outputting a second voltage to the battery pack;
the output end of the battery pack is connected with the input end of the switching circuit and is used for providing a third voltage for the switching circuit;
the input end of the main control circuit is connected with the output end of the switching power supply and the output end of the battery pack, and the output end of the main control circuit is connected with the input end of the switching circuit and is used for acquiring a first state signal of the switching power supply and a second state signal of the battery pack and outputting a first level signal and a second level signal to the switching circuit;
the output end of the switching circuit is connected with an external system, and is used for receiving the first level signal and the second level signal and outputting a first voltage provided by the switching power supply or a third voltage provided by the battery pack to the external system.
In one embodiment, the power supply circuit further includes:
and the temperature detection circuit is in contact with the battery pack, and the output end of the temperature detection circuit is connected with the input end of the main control circuit and is used for detecting the temperature of the battery pack and outputting the temperature to the main control circuit.
In one embodiment, the voltage setting circuit includes: the first resistor, the second resistor, the third resistor, the fourth resistor, the first MOS tube, the second MOS tube and the third MOS tube;
one end of the first resistor is connected with the voltage setting end of the charging circuit, and the other end of the first resistor is connected with the grid electrode of the first MOS tube and one end of the third resistor;
the other end of the third resistor is connected with the source electrode of the second MOS tube;
the grid electrode of the second MOS tube receives a given set voltage, and the drain electrode of the second MOS tube is grounded;
one end of the second resistor is connected with the voltage setting end of the charging circuit, and the other end of the second resistor is connected with the source electrode of the first MOS tube;
the drain electrode of the first MOS tube is connected with the feedback end of the charging circuit and one end of the fourth resistor;
the other end of the fourth resistor is connected with the source electrode of the third MOS tube;
the grid electrode of the third MOS tube is connected with the grid electrode of the second MOS tube, and the drain electrode of the third MOS tube is grounded.
In one embodiment, the current setting circuit includes: a fifth resistor and a fourth MOS tube;
one end of the fifth resistor is connected with the current setting end of the charging circuit, the other end of the fifth resistor is connected with the source electrode of the fourth MOS tube, the grid electrode of the fourth MOS tube receives a given setting current, and the drain electrode of the fourth MOS tube is grounded.
In one embodiment, the charging circuit includes: a charging chip;
the master control circuit includes: a main control chip;
the input end of the charging chip is connected with the output end of the switching power supply,
the voltage setting end and the feedback end of the charging chip are connected with the output end of the voltage setting circuit;
the current setting end of the charging chip is connected with the output end of the current setting circuit;
the output end of the charging chip is connected with the input end of the battery pack;
the first input end of the main control chip is connected with the switching power supply, and the second input end of the main control chip is connected with the battery pack;
the third input end of the main control chip is connected with the output end of the temperature detection circuit;
the first output end and the second output end of the main control chip are connected with the input end of the switching circuit.
In one embodiment, the switching circuit includes: a fifth MOS tube, a sixth MOS tube, a seventh MOS tube, an eighth MOS tube, a ninth MOS tube, a tenth MOS tube, a sixth resistor, a seventh resistor, an eighth resistor and a ninth resistor;
the grid electrode of the fifth MOS tube is connected with the first output end of the main control chip, the source electrode of the fifth MOS tube is connected with one end of the sixth resistor, and the drain electrode of the fifth MOS tube is grounded;
the other end of the sixth resistor is connected with one end of the seventh resistor, the grid electrode of the sixth MOS tube and the grid electrode of the seventh MOS tube;
the other end of the seventh resistor is connected with the source electrode of the sixth MOS tube and the source electrode of the seventh MOS tube;
the drain electrode of the sixth MOS tube is connected with the output end of the switching power supply;
the drain electrode of the seventh MOS tube is connected with the external system;
the grid electrode of the tenth MOS tube is connected with the second output end of the main control chip, the drain electrode of the tenth MOS tube is connected with one end of the ninth resistor, and the source electrode of the tenth MOS tube is grounded;
the other end of the ninth resistor is connected with one end of the eighth resistor, the grid electrode of the eighth MOS tube and the grid electrode of the ninth MOS tube;
the other end of the eighth resistor is connected with the source electrode of the eighth MOS tube and the source electrode of the ninth MOS tube;
the drain electrode of the eighth MOS tube is connected with the output end of the battery pack;
and the drain electrode of the ninth MOS tube is connected with the drain electrode of the seventh MOS tube.
In one embodiment, the temperature detection circuit includes: a rectifier diode, a tenth resistor, an eleventh resistor and an interface;
the cathode of the rectifier diode is connected with an external power supply, the anode of the rectifier diode is grounded, and the common end of the rectifier diode is connected with one end of the eleventh resistor and the third input end of the main control chip;
the other end of the eleventh resistor is connected with one end of the tenth resistor;
the other end of the tenth resistor is connected with the external power supply;
the input end of the interface is connected with the temperature sensor, the first output end of the interface is connected with the common end of the rectifier diode and grounded, and the second output end of the interface is connected with the connection point of the eleventh resistor and the tenth resistor.
In one embodiment, the temperature detection circuit further comprises: a capacitor;
one end of the capacitor is connected with the first output end of the interface, and the other end of the capacitor is connected with the common end of the rectifier diode.
In one embodiment, the battery pack includes at least: lithium batteries and/or lead acid batteries.
A power supply apparatus comprising: the power supply circuit is arranged in the shell.
The implementation of the embodiment of the utility model has the following beneficial effects:
the method comprises the steps that a switching power supply provides a first voltage for a switching circuit and a charging circuit; the voltage setting circuit outputs the voltage value to the charging circuit; the current setting circuit outputs a current value to the charging circuit; the charging circuit receives the first voltage, the voltage value and the current value and outputs a second voltage to the battery pack; the battery pack provides a third voltage to the switching circuit; the main control circuit acquires a first state signal of the switching power supply and a second state signal of the battery pack, and outputs a first level signal and a second level signal to the switching circuit; the switching circuit receives the first level signal and the second level signal and outputs a first voltage provided by the switching power supply or a third voltage provided by the battery pack to an external system. The switching circuit is used for realizing the switching of the switching power supply and the battery pack, and a circuit is not required to be independently arranged for supplying power to an external system, so that the structure of the power supply circuit is simplified; meanwhile, the voltage setting circuit and the current setting circuit are used for setting voltage and current values required by the battery packs, so that the charging requirements of different battery packs are met, and the service efficiency of the power supply circuit is improved.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Wherein:
FIG. 1 is a block diagram of a power supply circuit in one embodiment;
FIG. 2 is a block diagram of a power supply circuit in another embodiment;
FIG. 3 is a circuit diagram of a charging circuit in one embodiment;
FIG. 4 is a circuit diagram of a master circuit in one embodiment;
FIG. 5 is a circuit diagram of a voltage setting circuit in one embodiment;
FIG. 6 is a circuit diagram of a current setting circuit in one embodiment;
FIG. 7 is a circuit diagram of a switching circuit in one embodiment;
fig. 8 is a circuit diagram of a temperature detection circuit in one embodiment.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the prior art, a power supply circuit for supplying power to an external system is often provided with a switch power supply and a battery pack, the battery pack is charged through the switch power supply, and because the voltage values output by the switch power supply and the battery pack are different, different circuits are required to be arranged for the switch power supply and the battery pack to supply power to the external system, so that the whole power supply circuit has a complex structure; meanwhile, when the battery pack is charged through the switching power supply, the charging circuit is required to convert the voltage output by the switching power supply and then output the converted voltage to the battery pack, however, the voltage converted by the charging circuit cannot meet the charging requirements of the battery packs of multiple types, and the service efficiency of the power supply circuit is reduced. In order to solve the above technical problem, the present application provides a power supply circuit, as shown in fig. 1, including: a switching power supply 10, a voltage setting circuit 20, a current setting circuit 30, a charging circuit 40, a battery pack 50, and a switching circuit 60, wherein,
the output end of the switching power supply 10 is connected with the input end of the switching circuit 60 and the input end of the charging circuit 40, and is used for providing a first voltage for the switching circuit 60 and the charging circuit 40; the input end of the voltage setting circuit 20 receives a set voltage value, and the output end is connected with the input end of the charging circuit 40 and is used for outputting the voltage value to the charging circuit 40; the input end of the current setting circuit 30 receives a set current value, and the output end is connected with the input end of the charging circuit 40 and is used for outputting the current value to the charging circuit 40; an output terminal of the charging circuit 40 is connected to an input terminal of the battery pack 50, and is configured to receive the first voltage, the voltage value, and the current value, and output a second voltage to the battery pack 50; the output end of the battery pack 50 is connected with the input end of the switching circuit 60, and is used for providing a third voltage for the switching circuit 60; the input end of the main control circuit 70 is connected with the output end of the switch power supply 10 and the output end of the battery pack 50, and the output end is connected with the input end of the switching circuit 60, and is used for acquiring a first state signal of the switch power supply 10 and a second state signal of the battery pack 50, and outputting a first level signal and a second level signal to the switching circuit 60; the output terminal of the switching circuit 60 is connected to an external system, and is configured to receive the first level signal and the second level signal, and output the first voltage provided by the switching power supply 10 or the third voltage provided by the battery pack 50 to the external system. The method comprises the steps that a switching power supply provides a first voltage for a switching circuit and a charging circuit; the voltage setting circuit outputs the voltage value to the charging circuit; the current setting circuit outputs a current value to the charging circuit; the charging circuit receives the first voltage, the voltage value and the current value and outputs a second voltage to the battery pack; the battery pack provides a third voltage to the switching circuit; the main control circuit acquires a first state signal of the switching power supply and a second state signal of the battery pack, and outputs a first level signal and a second level signal to the switching circuit; the switching circuit receives the first level signal and the second level signal and outputs a first voltage provided by the switching power supply or a third voltage provided by the battery pack to an external system. The switching circuit is used for realizing the switching of the switching power supply and the battery pack, and a circuit is not required to be independently arranged for supplying power to an external system, so that the structure of the power supply circuit is simplified; meanwhile, the voltage setting circuit and the current setting circuit are used for setting voltage and current values required by the battery packs, so that the charging requirements of different battery packs are met, and the service efficiency of the power supply circuit is improved.
In one embodiment, as shown in fig. 2, the power supply circuit further includes: and a temperature detection circuit 80, wherein the temperature detection circuit 80 is in contact with the battery pack 50, and an output terminal is connected with an input terminal of the main control circuit 70, and is configured to detect the temperature of the battery pack 50 and output the temperature to the main control circuit 70.
In one embodiment, as shown in fig. 5, the voltage setting circuit 20 includes: the first resistor R12, the second resistor R11, the third resistor R13, the fourth resistor R7, the first MOS transistor Q11, the second MOS transistor Q12 and the third MOS transistor Q6;
one end of the first resistor R12 is connected to the voltage setting end v_bat of the charging circuit 40, and the other end of the first resistor R12 is connected to the gate of the first MOS transistor Q11 and one end of the third resistor R13;
the other end of the third resistor R13 is connected with the source electrode of the second MOS tube Q12;
the grid electrode of the second MOS tube Q12 receives a given set voltage, and the drain electrode of the second MOS tube Q12 is grounded;
one end of the second resistor R11 is connected to the voltage setting end v_bat of the charging circuit 40, and the other end of the second resistor R11 is connected to the source of the first MOS transistor Q11;
the drain electrode of the first MOS transistor Q11 is connected with the feedback end v_fb of the charging circuit 40 and one end of the fourth resistor R7;
the other end of the fourth resistor R7 is connected with the source electrode of the third MOS tube Q6;
the grid electrode of the third MOS tube Q6 is connected with the grid electrode of the second MOS tube Q12, and the drain electrode of the third MOS tube Q6 is grounded.
In one embodiment, as shown in fig. 6, the current setting circuit 30 includes: a fifth resistor R2 and a fourth MOS transistor Q1; wherein,
one end of the fifth resistor R2 is connected to the current setting end i_set of the charging circuit 40, the other end of the fifth resistor R2 is connected to the source of the fourth MOS transistor Q1, the gate of the fourth MOS transistor Q1 receives a given SET current, and the drain of the fourth MOS transistor Q1 is grounded.
In one embodiment, as shown in fig. 3, the charging circuit 40 includes: a charging chip U1; as shown in fig. 4, the master circuit 70 includes: a main control chip U2; wherein,
the input end of the charging chip U1 is connected with the output end of the switching power supply 10,
the voltage setting terminal v_bat and the feedback terminal v_fb of the charging chip U1 are both connected to the output terminal of the voltage setting circuit 20;
the current setting terminal i_set of the charging chip U1 is connected to the output terminal of the current setting circuit 30;
the output end of the charging chip U1 is connected with the input end of the battery pack 50;
a first input end of the main control chip U2 is connected with the switching power supply 10, and a second input end of the main control chip U2 is connected with the battery pack 50;
a third input end ADC_NTC of the main control chip U2 is connected with the output end of the temperature detection circuit 80;
the first output end cut_acdc and the second output end cut_bat of the main control chip U2 are both connected to the input end of the switching circuit 60.
In one embodiment, as shown in fig. 7, the switching circuit 60 includes: fifth MOS transistor Q36, sixth MOS transistor Q35, seventh MOS transistor Q34, eighth MOS transistor Q38, ninth MOS transistor Q37, tenth MOS transistor Q39, sixth resistor R43, seventh resistor R42, eighth resistor R44, and ninth resistor R45; wherein,
the grid electrode of the fifth MOS tube Q36 is connected with the first output end cut_ACDC of the main control chip U2, the source electrode of the fifth MOS tube Q36 is connected with one end of the sixth resistor R43, and the drain electrode of the fifth MOS tube Q36 is grounded;
the other end of the sixth resistor R43 is connected with one end of the seventh resistor R42, the grid electrode of the sixth MOS tube Q35 and the grid electrode of the seventh MOS tube Q34;
the other end of the seventh resistor R42 is connected with the source electrode of the sixth MOS tube Q35 and the source electrode of the seventh MOS tube Q34;
the drain electrode of the sixth MOS tube Q35 is connected with the output end of the switching power supply 10;
the drain electrode of the seventh MOS transistor Q34 is connected with the external system;
the grid electrode of the tenth MOS transistor Q39 is connected with the second output end cut_BAT of the main control chip U2, the drain electrode of the tenth MOS transistor Q39 is connected with one end of the ninth resistor R45, and the source electrode of the tenth MOS transistor Q39 is grounded;
the other end of the ninth resistor R45 is connected with one end of the eighth resistor R44, the grid electrode of the eighth MOS tube Q38 and the grid electrode of the ninth MOS tube Q37;
the other end of the eighth resistor R44 is connected with the source electrode of the eighth MOS tube Q38 and the source electrode of the ninth MOS tube Q37;
the drain electrode of the eighth MOS transistor Q38 is connected with the output end of the battery pack 50;
the drain electrode of the ninth MOS transistor Q37 is connected with the drain electrode of the seventh MOS transistor Q34.
In one embodiment, as shown in fig. 8, the temperature detection circuit 80 includes: a rectifier diode D1, a tenth resistor R46, an eleventh resistor R48, and an interface J1; wherein,
the cathode of the rectifying diode D1 is connected with an external power supply, the anode of the rectifying diode D1 is grounded, and the common end of the rectifying diode D1 is connected with one end of the eleventh resistor R48 and the third input end ADC_NTC of the main control chip U2;
the other end of the eleventh resistor R48 is connected with one end of the tenth resistor R46;
the other end of the tenth resistor R46 is connected with the external power supply;
the input end of the interface J1 is connected with the temperature sensor, the first output end 1 of the interface J1 is connected with the common end of the rectifier diode D1 and grounded, and the second output end 2 of the interface J1 is connected with the connection point of the eleventh resistor R48 and the tenth resistor R46.
In one embodiment, as shown in fig. 8, the temperature detection circuit 80 further includes: a capacitor C1; one end of the capacitor C1 is connected to the first output end 1 of the interface J1, and the other end is connected to the common end of the rectifying diode D1.
In one embodiment, the battery pack 50 includes at least: lithium batteries and/or lead acid batteries.
The application also provides a power supply device, comprising: the power supply circuit is arranged in the shell.
The working principle of the application is as follows:
in the following application, the switching power supply 10 provides a first voltage to the charging chip U1, and meanwhile, the voltage setting circuit 20 and the current setting circuit 30 respectively provide a set voltage value and a set current value to the charging chip U1, and the charging chip U1 adjusts and outputs a second voltage according to the set voltage value and the set current value so as to charge the battery pack 50, where the battery pack may be formed by a lithium battery and/or a lead-acid battery, the application sets multiple sets of voltage setting circuits 20, each set of voltage setting circuits 20 corresponds to a different battery pack 50, and the battery pack 50 may be formed by: one lithium battery, two lithium batteries, three lithium batteries, four lithium batteries, five lithium batteries, six lithium batteries and one lead-acid battery are called two lead-acid batteries; the resistances of the corresponding first resistor R12, second resistor R11, third resistor R13, and fourth resistor R7 are different from each other (voltage setting circuits corresponding to the differently configured battery packs are not shown in the present application). The current setting circuit 30 of the present application is also provided in plural, and the current values settable by different current setting circuits 30 are also different, and may be: 2.5A, 2.0A, 1.5A, 1.0A or 0.5A. The charging chip U1 may detect the first state signal of the battery pack 50 and the second state signal of the switching power supply 10 in real time, and when the charging chip U1 detects that the first state signal of the battery pack 50 is at a low level, the charging chip U1 controls the switching circuit 60 to be conducted with the loop of the battery pack 50 through the second output terminal cut_bat, so that the battery pack 50 can be connected to an external system, and is configured to receive the first level signal and the second level signal, and output the first power supplied by the switching power supply 10 to the external system; when the charging chip U1 detects that the second state signal bit of the battery pack 50 is at a low level, the charging chip U1 controls the switching circuit 60 to be conducted with the loop of the switching power supply 10 through the first output terminal cut_acdc, so that the switching power supply 10 can be connected to an external system.
The foregoing disclosure is illustrative of the present utility model and is not to be construed as limiting the scope of the utility model, which is defined by the appended claims.
Claims (10)
1. A power supply circuit, comprising:
the output end of the switching power supply is connected with the input end of the switching circuit and the input end of the charging circuit, and is used for providing a first voltage for the switching circuit and the charging circuit;
the input end of the voltage setting circuit receives a set voltage value, and the output end of the voltage setting circuit is connected with the input end of the charging circuit and is used for outputting the voltage value to the charging circuit;
the input end of the current setting circuit receives a set current value, and the output end of the current setting circuit is connected with the input end of the charging circuit and is used for outputting the current value to the charging circuit;
the output end of the charging circuit is connected with the input end of the battery pack, and is used for receiving the first voltage, the voltage value and the current value and outputting a second voltage to the battery pack;
the output end of the battery pack is connected with the input end of the switching circuit and is used for providing a third voltage for the switching circuit;
the input end of the main control circuit is connected with the output end of the switching power supply and the output end of the battery pack, and the output end of the main control circuit is connected with the input end of the switching circuit and is used for acquiring a first state signal of the switching power supply and a second state signal of the battery pack and outputting a first level signal and a second level signal to the switching circuit;
the output end of the switching circuit is connected with an external system, and is used for receiving the first level signal and the second level signal and outputting a first voltage provided by the switching power supply or a third voltage provided by the battery pack to the external system.
2. The power supply circuit of claim 1, further comprising:
and the temperature detection circuit is in contact with the battery pack, and the output end of the temperature detection circuit is connected with the input end of the main control circuit and is used for detecting the temperature of the battery pack and outputting the temperature to the main control circuit.
3. The power supply circuit of claim 1, wherein the voltage setting circuit comprises: the first resistor, the second resistor, the third resistor, the fourth resistor, the first MOS tube, the second MOS tube and the third MOS tube;
one end of the first resistor is connected with the voltage setting end of the charging circuit, and the other end of the first resistor is connected with the grid electrode of the first MOS tube and one end of the third resistor;
the other end of the third resistor is connected with the source electrode of the second MOS tube;
the grid electrode of the second MOS tube receives a given set voltage, and the drain electrode of the second MOS tube is grounded;
one end of the second resistor is connected with the voltage setting end of the charging circuit, and the other end of the second resistor is connected with the source electrode of the first MOS tube;
the drain electrode of the first MOS tube is connected with the feedback end of the charging circuit and one end of the fourth resistor;
the other end of the fourth resistor is connected with the source electrode of the third MOS tube;
the grid electrode of the third MOS tube is connected with the grid electrode of the second MOS tube, and the drain electrode of the third MOS tube is grounded.
4. The power supply circuit of claim 1, wherein the current setting circuit comprises: a fifth resistor and a fourth MOS tube;
one end of the fifth resistor is connected with the current setting end of the charging circuit, the other end of the fifth resistor is connected with the source electrode of the fourth MOS tube, the grid electrode of the fourth MOS tube receives a given setting current, and the drain electrode of the fourth MOS tube is grounded.
5. The power supply circuit of claim 2, wherein,
the charging circuit includes: a charging chip;
the master control circuit includes: a main control chip;
the input end of the charging chip is connected with the output end of the switching power supply,
the voltage setting end and the feedback end of the charging chip are connected with the output end of the voltage setting circuit;
the current setting end of the charging chip is connected with the output end of the current setting circuit;
the output end of the charging chip is connected with the input end of the battery pack;
the first input end of the main control chip is connected with the switching power supply, and the second input end of the main control chip is connected with the battery pack;
the third input end of the main control chip is connected with the output end of the temperature detection circuit;
the first output end and the second output end of the main control chip are connected with the input end of the switching circuit.
6. The power supply circuit of claim 5, wherein the power supply circuit comprises a power supply circuit,
the switching circuit includes: a fifth MOS tube, a sixth MOS tube, a seventh MOS tube, an eighth MOS tube, a ninth MOS tube, a tenth MOS tube, a sixth resistor, a seventh resistor, an eighth resistor and a ninth resistor;
the grid electrode of the fifth MOS tube is connected with the first output end of the main control chip, the source electrode of the fifth MOS tube is connected with one end of the sixth resistor, and the drain electrode of the fifth MOS tube is grounded;
the other end of the sixth resistor is connected with one end of the seventh resistor, the grid electrode of the sixth MOS tube and the grid electrode of the seventh MOS tube;
the other end of the seventh resistor is connected with the source electrode of the sixth MOS tube and the source electrode of the seventh MOS tube;
the drain electrode of the sixth MOS tube is connected with the output end of the switching power supply;
the drain electrode of the seventh MOS tube is connected with the external system;
the grid electrode of the tenth MOS tube is connected with the second output end of the main control chip, the drain electrode of the tenth MOS tube is connected with one end of the ninth resistor, and the source electrode of the tenth MOS tube is grounded;
the other end of the ninth resistor is connected with one end of the eighth resistor, the grid electrode of the eighth MOS tube and the grid electrode of the ninth MOS tube;
the other end of the eighth resistor is connected with the source electrode of the eighth MOS tube and the source electrode of the ninth MOS tube;
the drain electrode of the eighth MOS tube is connected with the output end of the battery pack;
and the drain electrode of the ninth MOS tube is connected with the drain electrode of the seventh MOS tube.
7. The power supply circuit of claim 5, wherein the temperature detection circuit comprises: a rectifier diode, a tenth resistor, an eleventh resistor and an interface;
the cathode of the rectifier diode is connected with an external power supply, the anode of the rectifier diode is grounded, and the common end of the rectifier diode is connected with one end of the eleventh resistor and the third input end of the main control chip;
the other end of the eleventh resistor is connected with one end of the tenth resistor;
the other end of the tenth resistor is connected with the external power supply;
the input end of the interface is connected with the temperature sensor, the first output end of the interface is connected with the common end of the rectifier diode and grounded, and the second output end of the interface is connected with the connection point of the eleventh resistor and the tenth resistor.
8. The power supply circuit of claim 7, wherein the power supply circuit comprises a power supply circuit,
the temperature detection circuit further includes: a capacitor;
one end of the capacitor is connected with the first output end of the interface, and the other end of the capacitor is connected with the common end of the rectifier diode.
9. The power supply circuit of claim 1, wherein the battery pack comprises at least: lithium batteries and/or lead acid batteries.
10. A power supply device, characterized by comprising: a housing and a power supply circuit as claimed in any one of claims 1 to 9, the power supply circuit being disposed within the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321970398.2U CN220382797U (en) | 2023-07-25 | 2023-07-25 | Power supply circuit and power supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321970398.2U CN220382797U (en) | 2023-07-25 | 2023-07-25 | Power supply circuit and power supply device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220382797U true CN220382797U (en) | 2024-01-23 |
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| CN202321970398.2U Active CN220382797U (en) | 2023-07-25 | 2023-07-25 | Power supply circuit and power supply device |
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