CN211351756U - Charging circuit, portable power source and robot - Google Patents
Charging circuit, portable power source and robot Download PDFInfo
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- CN211351756U CN211351756U CN201922426523.3U CN201922426523U CN211351756U CN 211351756 U CN211351756 U CN 211351756U CN 201922426523 U CN201922426523 U CN 201922426523U CN 211351756 U CN211351756 U CN 211351756U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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Abstract
A charging circuit, a mobile power supply and a robot, comprising: the battery voltage detection circuit comprises a first voltage transformation circuit, a first switch circuit, a battery voltage detection circuit, a control circuit and a second voltage transformation circuit; the first voltage transformation circuit performs voltage conversion on the input voltage according to the first voltage transformation enabling signal to generate a first voltage; the first switch circuit generates a first transformation enabling signal according to a first control signal; the battery voltage detection circuit detects the voltage of the battery to generate a battery voltage detection signal; the control circuit generates a first control signal and a second control signal according to the battery voltage detection signal; the second voltage transformation circuit performs voltage conversion on the first voltage according to a second control signal to generate a charging voltage; the input voltage is converted into the charging voltage through the control switch circuit and the two discrete voltage transformation circuits to efficiently charge the battery, so that the heat productivity in the charging process is effectively reduced, the electricity utilization potential safety hazard when the battery is charged is reduced, the charging time is reduced, and the charging efficiency and the practicability are improved.
Description
Technical Field
The utility model belongs to the technical field of the robot battery charging management, especially, relate to a charging circuit, portable power source and robot.
Background
The Power adapter (Power adapter) is a Power supply conversion device for small portable electronic equipment and electronic appliances, the working principle of the Power adapter is that alternating current input is converted into direct current output, and the Power adapter is widely matched with equipment such as security cameras, set top boxes, routers, light bars, massage instruments and the like. In the daily life of the power age, when people charge electronic devices (such as mobile power supplies, mobile phones, tablet computers, and the like), it is necessary to convert a power supply voltage through a power adapter or a charger to generate and output a charging voltage or a charging current to charge the electronic devices.
However, the charging voltage output by the power adapter or the charger is generally a fixed value, but the battery voltage of the electronic device to be charged is constantly changed along with the charging process, so that the voltage output by the power adapter or the charger is higher than the full-charge voltage when the battery is fully charged, and the battery can be successfully fully charged.
In a conventional charging method for a battery (e.g., a power supply battery of a robot), when an input voltage is lower than a full voltage when the battery is fully charged, an integrated chip with a voltage boosting and current limiting function is generally used to convert the voltage and then output the charging voltage to charge the battery.
Therefore, when the battery is charged, the traditional technical scheme has the problems of serious heating, limitation on charging current, longer charging time, low charging efficiency and large potential safety hazard of power utilization.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides a charging circuit, portable power source and robot aims at solving the battery charging that exists among the traditional technical scheme, and it is serious to generate heat, has restricted charging current, leads to the charge time than longer, and charging efficiency is low and the problem that the power consumption potential safety hazard is big.
The utility model provides a first aspect of the embodiment provides a charging circuit, include:
a first switching circuit configured to generate a first transformation enable signal according to a first control signal;
the first transformation circuit is connected with the first switch circuit and is configured to perform voltage conversion on an input voltage according to the first transformation enabling signal so as to generate a first voltage;
the battery voltage detection circuit is connected with a battery and is configured to detect the voltage of the battery to generate a battery voltage detection signal;
a control circuit connected to the first switching circuit and the battery voltage detection circuit, and configured to generate the first control signal and the second control signal according to the battery voltage detection signal;
and the second voltage transformation circuit is connected with the first voltage transformation circuit and the control circuit and is configured to perform voltage conversion on the first voltage according to the second control signal so as to generate a charging voltage.
In one embodiment, the charging circuit further comprises:
the temperature detection circuit is connected with the second voltage transformation circuit and is configured to detect the temperature of the battery to generate a temperature detection signal;
the second voltage transformation circuit is further configured to generate a charge state signal according to the charge voltage and the temperature detection signal;
the control circuit is specifically configured to generate the first control signal and the second control signal according to the battery voltage detection signal and the state of charge signal.
In one embodiment, the charging circuit further comprises:
the first filtering circuit is connected with the first voltage transformation circuit and is configured to filter and reduce noise of the input voltage;
the second filter circuit is connected with the first voltage transformation circuit and the second voltage transformation circuit and is configured to filter and reduce noise of the first voltage;
and the third filter circuit is connected with the second voltage transformation circuit and the battery and is configured to filter and reduce the noise of the charging voltage.
In one embodiment, the charging circuit further comprises:
and the reverse connection prevention protection circuit is connected with the first transformation circuit and the second transformation circuit and is configured to perform reverse connection protection on the first voltage.
In one embodiment, the first switching circuit includes: the circuit comprises a first resistor, a second resistor, a first capacitor and a first triode;
the first end of the first resistor is a first control signal input end of the first switch circuit;
the second end of the first resistor is connected with the first end of the second resistor, the first end of the first capacitor and the base electrode of the first triode, and the second end of the second resistor, the second end of the first capacitor and the emitter electrode of the first triode are connected with a power ground;
the collector of the first triode is the first transformation enabling signal output end of the first switching circuit.
In one embodiment, the first transforming circuit includes: the circuit comprises a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor and a first transformation chip;
the first end of the third resistor and the voltage input end of the first transformation chip are connected with an input voltage, the switch control end of the first transformation chip and the first end of the seventh resistor are connected with the first voltage, the second end of the seventh resistor is connected with the first end of the fourth capacitor, the second end of the fourth capacitor is connected with the bootstrap end of the first transformation chip, the second end of the third resistor is connected with the first end of the fourth resistor and the enable end of the first transformation chip, the mode selection end of the first transformation chip is connected with the second end of the fifth resistor and the first end of the sixth resistor, the power supply end of the first transformation chip is connected with the first end of the fifth resistor and the first end of the second capacitor, the ground end of the first transformation chip is connected with the first end of the third capacitor, the second end of the fourth resistor, the switch control end of the first transformation chip and the first end of the seventh resistor are connected with the bootstrap end of the first capacitor, the second end of the fourth resistor is connected, A second end of the sixth resistor, a second end of the second capacitor and a second end of the third capacitor are connected with a power ground;
the ground end of the first transformation chip is connected with a power ground, the error amplification output end of the first transformation chip is connected with the first end of the fifth capacitor, the second end of the fifth capacitor is connected with the first end of the eighth resistor, the feedback input end of the first transformation chip is connected with the first end of the ninth resistor and the second end of the tenth resistor, the output end of the first transformation chip is connected with the first end of the tenth resistor, and the second end of the eighth resistor and the second end of the ninth resistor are connected with the power ground;
the first end of the fourth resistor and the enable end of the first transformer chip are jointly formed into a first transformer enable signal input end of the first transformer circuit;
the output end of the first voltage transformation chip is a first voltage output end of the first voltage transformation circuit.
In one embodiment, the second transforming circuit comprises: the second transformer chip, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a first inductor and a first diode tube;
a first end of the twelfth resistor is connected with a second voltage, a second end of the twelfth resistor is connected with a first end of the fifteenth resistor and a first end of the eighth resistor, a second end of the fifteenth resistor is connected with a thermistor input end of the second transformer chip, an enable end of the second transformer chip is connected with a second end of the sixteenth resistor, a first end of the sixteenth resistor is connected with a first end of the seventh capacitor and a first end of the eleventh resistor, a second end of the seventh capacitor, a second end of the eleventh resistor and a second end of the eighth capacitor are connected with a power ground, a battery number signal input end of the second transformer chip is connected with a first end of the thirteenth resistor, a reference voltage end of the second transformer chip is connected with a first end of the fourteenth resistor, a second end of the thirteenth resistor, a reference voltage end of the twelfth resistor, a second end of the fifteenth resistor, a first end of the fifteenth resistor and a second end of the eighth resistor, The first end of the sixth capacitor is connected, the second end of the fourteenth resistor is connected with the charging state indicating end of the second transformer chip, the power end of the second transformer chip and the voltage input end of the second transformer chip are connected with the first voltage, and the ground end of the second transformer chip is connected with the power ground;
the counting period setting end of the second transformer chip is connected with the first end of the thirteenth capacitor, the voltage compensation end of the second transformer chip is connected with the first end of the twentieth resistor, the second end of the twentieth resistor is connected with the first end of the twelfth capacitor, the current compensation end of the second transformer chip is connected with the first end of the nineteenth resistor, the second end of the nineteenth resistor is connected with the first end of the eleventh capacitor, the second end of the thirteenth capacitor, the second end of the twelfth capacitor and the second end of the eleventh capacitor are connected with a power ground, the battery voltage detection end of the second transformer chip is connected with the second end of the eighteenth resistor, and the battery charging current detection end of the second transformer chip is connected with the first end of the eighteenth resistor and the second end of the first inductor, a bootstrap end of the second transformer chip is connected with a first end of the seventeenth resistor, a second end of the seventeenth resistor is connected with a first end of the tenth capacitor, a second end of the tenth capacitor is connected with a cathode of the first diode and a second end of the first inductor, an anode of the first diode is connected with a power ground, and a switch output end of the second transformer chip is connected with a first end of the first inductor;
the charging state indicating end of the second voltage transformation chip is a charging state signal output end of the second voltage transformation circuit;
the first end of the fifteenth resistor is a temperature detection signal input end of the second voltage transformation circuit;
the first end of the sixteenth resistor is a second control signal input end of the second voltage transformation circuit;
and the second end of the eighteenth resistor is a charging voltage output end of the second voltage transformation circuit.
In one embodiment, the first filter circuit includes: a fourteenth capacitor and a second inductor;
a first end of the fourteenth capacitor is an input voltage input end of the first filter circuit, and a second end of the second inductor is an input voltage output end of the first filter circuit;
a first end of the fourteenth capacitor is connected to the first end of the second inductor, and a second end of the fourteenth capacitor is connected to a power ground.
The utility model discloses the second aspect of the embodiment provides a portable power source, portable power source includes the aforesaid charging circuit.
A third aspect of the embodiments of the present invention provides a robot, which includes the mobile power supply described above.
The charging circuit performs boost conversion on input voltage with a low voltage value through the first voltage transformation circuit according to the first voltage transformation enabling signal to generate first voltage, the second voltage transformation circuit performs reduction conversion on the first voltage according to the second control signal to generate second charging voltage, the control circuit generates a first control signal and a second control signal according to a battery voltage detection signal, the first switch circuit generates the first voltage transformation enabling signal according to the first control signal to achieve the purpose of performing voltage conversion on the input voltage lower than the full-charge voltage of the battery to generate proper charging voltage to charge the battery, the small input voltage is converted into the charging voltage to efficiently charge the battery through controlling the switch circuit and the two separated voltage transformation circuits, the heat productivity in the charging process is effectively reduced, and the electricity utilization safety hazard in the charging of the battery is reduced; meanwhile, the charging efficiency is improved, and the charging time is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a charging circuit according to an embodiment of the present invention;
fig. 2 is another schematic structural diagram of a charging circuit according to an embodiment of the present invention;
fig. 3 is another schematic structural diagram of a charging circuit according to an embodiment of the present invention;
fig. 4 is another schematic structural diagram of a charging circuit according to an embodiment of the present invention;
fig. 5 is a schematic circuit diagram of an example of a charging circuit according to an embodiment of 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.
Referring to fig. 1, a schematic structural diagram of a charging circuit according to an embodiment of the present invention only shows portions related to the embodiment for convenience of description, and the details are as follows:
the utility model provides a first aspect of the embodiment provides a charging circuit, include: a first voltage transformation circuit 11, a first switch circuit 12, a battery voltage detection circuit 13, a control circuit 14, and a second voltage transformation circuit 15.
A first switching circuit 12 configured to generate a first transformation enable signal according to a first control signal; a first voltage transformation circuit 11 connected to the first switch circuit 12 and configured to perform voltage conversion on an input voltage according to a first voltage transformation enable signal to generate a first voltage; a battery voltage detection circuit 13 connected to the battery and configured to detect a voltage of the battery to generate a battery voltage detection signal; a control circuit 14 connected to the switching circuit and the battery voltage detection circuit 13, and configured to generate a first control signal and a second control signal according to the battery voltage detection signal; and a second voltage transformation circuit 15 connected to the first voltage transformation circuit 11 and the control circuit 14, and configured to perform voltage conversion on the first voltage according to a second control signal to generate a charging voltage.
In specific implementation, the control circuit 14 includes one of a microprocessor, a single chip, and a dedicated chip.
Optionally, the control circuit 14 employs a microprocessor. When the battery needs to be charged, the microprocessor generates a first control signal with a first level and a second control signal with a first level. Optionally, the first level is a low level, and the second level is a high level. The first switch circuit 12 is controlled to be turned off by the first control signal with low level, the first switch circuit 12 correspondingly generates a first transformation enabling signal with high level, and the first transformation circuit 11 is controlled to convert the input voltage to generate a first voltage, wherein the voltage value of the first voltage is greater than the voltage value of the battery when the battery is fully charged; the second control signal of the first level controls the second transforming circuit 15 to generate a charging voltage according to the first voltage to charge the battery. In a specific implementation, the second voltage transformation circuit 15 may be further controlled by the second control signal of the first level to generate a charging current according to the first voltage to charge the battery, so as to ensure that a proper charging voltage can be generated according to a smaller input voltage to charge the battery, and the battery can be fully charged.
When the battery voltage detection circuit 13 detects that the battery is fully charged or the charging abnormality requires the charging voltage to be turned off, the control circuit 14 generates a first control signal of a second level and a second control signal of the second level; the first switch circuit 12 is turned on according to the first control signal of the second level, generates the first transformation enable signal of the low level, controls the first transformation circuit 11 to stop converting the input voltage to generate the first voltage; the second voltage transformation circuit stops generating the charging voltage according to the control signal of the second level.
The embodiment of the utility model provides a can realize generating suitable charging voltage according to large-scale input voltage (input voltage is less than battery full-charge voltage or input voltage is greater than battery full-charge voltage all can) and charge to the battery to cut off charging circuit completely after the battery is fully charged, effectively reduced the calorific capacity in the charging process, reduced the power consumption potential safety hazard when charging for the battery; meanwhile, the charging time is reduced, and the charging efficiency is improved.
Referring to fig. 2, in one embodiment, the charging circuit further includes: a temperature detection circuit 16.
A temperature detection circuit 16 connected to the second voltage transformation circuit 15 and configured to detect a temperature of the battery to generate a temperature detection signal; the second voltage transformation circuit 15 is further configured to generate a charge state signal from the charge voltage and the temperature detection signal; the control circuit 14 is specifically configured to generate a first control signal and a second control signal from the battery voltage detection signal and the state of charge signal.
In specific implementation, the temperature detection circuit 16 can detect the temperature of the battery and the temperature of the voltage transformation circuits (the first voltage transformation circuit 11 and the second voltage transformation circuit 15), and the second voltage circuit 15 can detect the charging current and the charging voltage, so that when an abnormal state such as an excessive temperature or an abnormal state of the charging state (for example, the charging voltage or the charging current, or the battery voltage) is detected, the abnormal state is fed back to the control circuit 14 in time, so that the control circuit 14 controls the voltage transformation circuit to be turned off in time, the battery charging is stopped, and the safety and reliability of the charging current are improved.
Referring to fig. 3, in one embodiment, the charging circuit further includes: a first filter circuit 17, a second filter circuit 18, and a third filter circuit 19.
A first filter circuit 17 connected to the first transformer circuit 11 and configured to filter and denoise an input voltage; a second filter circuit 18 connected to the first transformer circuit 11 and the second transformer circuit 15, and configured to filter and denoise the first voltage; and a third filter circuit 19 connected to the second transformer circuit 15 and the battery, and configured to filter and reduce noise of the charging voltage.
In specific implementation, noise interference in the input voltage, the first voltage and the charging voltage can be effectively filtered and suppressed through the filter circuit, and the charging precision and the stability and the reliability of the charging circuit are improved.
Referring to fig. 4, in one embodiment, the charging circuit further includes: a reverse-connection protection circuit 20.
The reverse connection prevention protection circuit 20 is connected to the first transformer circuit 11 and the second transformer circuit 15, and configured to perform reverse connection protection on the first voltage.
In specific implementation, the reverse connection prevention protection circuit can prevent the first voltage from being reversely connected or flowing backwards, so that the charging circuit is prevented from being damaged by reverse connection or reverse flow of the voltage.
Referring to fig. 5, in one embodiment, the first switch circuit 12 includes: the circuit comprises a first resistor R1, a second resistor R2, a first capacitor C1 and a first triode Q1.
A first terminal of the first resistor R1 is a first control signal input terminal of the first switch circuit 12.
A second terminal of the first resistor R1 is connected to a first terminal of the second resistor R2, a first terminal of the first capacitor C1, and a base of the first transistor Q1, and a second terminal of the second resistor R2, a second terminal of the first capacitor C1, and an emitter of the first transistor Q1 are connected to the power ground.
The collector of the first transistor Q1 is the first transformer enable signal output terminal of the first switch circuit 12.
Referring to fig. 5, in one embodiment, the first transforming circuit 11 includes: the circuit comprises a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a second capacitor C3, a third capacitor C4, a fourth capacitor C5, a fifth capacitor C6 and a first transformer chip U1.
A first end of a third resistor R3 and a voltage input end VIN of a first transformer chip U1 are connected with an input voltage, a switch control end SW of the first transformer chip U1 and a first end of a seventh resistor R7 are connected with a first voltage, a second end of a seventh resistor R7 is connected with a first end of a fourth capacitor C5, a second end of a fourth capacitor C5 is connected with a bootstrap terminal BST of the first transformer chip U1, a second end of a third resistor R3 is connected with a first end of a fourth resistor R4 and an enable terminal EN of the first transformer chip U1, a MODE selection terminal MODE of the first transformer chip U1 is connected with a second end of a fifth resistor R5 and a first end of a sixth resistor R6, a power supply terminal VDD of the first transformer chip U1 is connected with a first end of the fifth resistor R5 and a first end of the second capacitor C3, a ground terminal SS of the first transformer chip U1 is connected with a second end of the third capacitor R4, a second end of the fourth resistor R6 is connected with a second end of the fourth transformer chip U6328, and a second end of the fourth terminal R6, The second terminal of the second capacitor C3 and the second terminal of the third capacitor C4 are connected to power ground.
The ground end GND of the first transformer chip U1 is connected to the power ground, the error amplification output end COMP of the first transformer chip U1 is connected to the first end of the fifth capacitor C6, the second end of the fifth capacitor C6 is connected to the first end of the eighth resistor R8, the feedback input end FB of the first transformer chip U1 is connected to the first end of the ninth resistor R9 and the second end of the tenth resistor R10, the output end OUT of the first transformer chip U1 is connected to the first end of the tenth resistor R10, and the second ends of the eighth resistor R8 and the ninth resistor R9 are connected to the power ground.
The first end of the fourth resistor R4 and the enable end EN of the first transformer chip U1 together constitute a first transformer enable signal input end of the first transformer circuit 11.
The output terminal OUT of the first transformer chip U1 is a first voltage output terminal of the first transformer circuit 11.
Referring to fig. 5, in one embodiment, the second transforming circuit 15 includes: the second transformer chip U2, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R11, a sixteenth resistor R11, a seventeenth resistor R11, an eighteenth resistor R11, a nineteenth resistor R19, a twentieth resistor R20, a sixth capacitor C8, a seventh capacitor C9, an eighth capacitor C10, a ninth capacitor C11, a tenth capacitor C12, an eleventh capacitor C13, a twelfth capacitor C14, a thirteenth capacitor C15, a first inductor L2, and a first diode D1.
A first terminal of a twelfth resistor R12 is connected to the second voltage, a second terminal of the twelfth resistor R12 is connected to a first terminal of a fifteenth resistor R15 and a first terminal of an eighth capacitor C10, a second terminal of the fifteenth resistor R15 is connected to a thermistor input NTC of a second transformer chip U2, an enable terminal EN of the second transformer chip U2 is connected to a second terminal of a sixteenth resistor R16, a first terminal of the sixteenth resistor R16 is connected to a first terminal of a seventh capacitor C9 and a first terminal of an eleventh resistor R11, a second terminal of a seventh capacitor C9, a second terminal of an eleventh resistor R11 and a second terminal of an eighth capacitor C10 are connected to the power ground, a cell number signal input terminal CELLS of the second transformer chip U2 is connected to a first terminal of a thirteenth resistor R13, a reference voltage terminal VREF33 of the second transformer chip U2 is connected to a first terminal of a fourteenth resistor R14, a second terminal of a thirteenth resistor R2, a second terminal of the thirteenth resistor R13 6 and a sixth capacitor 8, a second end of the fourteenth resistor R14 is connected to the charge state indicator CHGOK of the second transformer chip U2, a power supply terminal VCC of the second transformer chip U2 and a voltage input terminal VIN of the second transformer chip U2 are connected to the first voltage, and a ground terminal of the second transformer chip U2 is connected to the power ground.
A count period setting end TMR of the second transformer chip U2 is connected to a first end of a thirteenth capacitor C15, a voltage compensation end COMPV of the second transformer chip U2 is connected to a first end of a twentieth resistor R20, a second end of a twentieth resistor R20 is connected to a first end of a twelfth capacitor C14, a current compensation end COMPI of the second transformer chip U2 is connected to a first end of a nineteenth resistor R19, a second end of a nineteenth resistor R19 is connected to a first end of an eleventh capacitor C13, a second end of the thirteenth capacitor C15, a second end of a twelfth capacitor C14, and a second end of an eleventh capacitor C13 are connected to ground, a battery voltage detection end BATT of the second transformer chip U2 is connected to a second end of an eighteenth resistor R18, a battery charging current detection end of the second transformer chip U2 is connected to a first end of an eighteenth resistor R18 and a second end of a first inductor L1, a second end of a CSP of the second transformer chip U2 is connected to a seventeenth end of a second capacitor C2, a second terminal of the seventeenth resistor R17 is connected to the first terminal of the tenth capacitor C10, a second terminal of the tenth capacitor C10 is connected to the cathode of the first diode D1 and the second terminal of the first inductor L1, an anode of the first diode D1 is connected to the power ground, and a switch output terminal SW of the second transformer chip U2 is connected to the first terminal of the first inductor L1.
The charge state indicator CHGOK of the second transformer chip U2 is the charge state signal output terminal of the second transformer circuit 15.
A first end of the fifteenth resistor R15 is a temperature detection signal input end of the second transformer circuit 15.
A first end of the sixteenth resistor R16 is a second control signal input end of the second transformer circuit 15.
The second terminal of the eighteenth resistor R18 is the charging voltage output terminal of the second transformer circuit 15.
Referring to fig. 5, in one embodiment, the first filter circuit 17 includes: a fourteenth capacitor C2 and a second inductor L2.
A first terminal of the fourteenth capacitor C2 is an input voltage terminal of the first filter circuit 17, and a second terminal of the second inductor L2 is an input voltage terminal of the first filter circuit 17.
A first terminal of the fourteenth capacitor C2 is connected to the first terminal of the second inductor L2, and a second terminal of the fourteenth capacitor C2 is connected to the power ground.
In specific implementation, the temperature detection circuit 16 includes a temperature sensitive resistor, and the battery voltage detection circuit 13 includes a voltage dividing resistor, and can effectively detect the battery temperature and the battery voltage, so that the control circuit can control the charging circuit to perform high-efficiency and low-heat charging control on the battery according to the detection result of the battery temperature and the battery voltage.
Optionally, the first transformer chip U1 is a boost chip, for example, the first transformer chip U1 is a boost chip with a model number of MP9185 GL-Z; the second transformer chip U2 is a buck chip, for example, the second transformer chip U2 is a buck chip with model MP26123 DR-Z.
The operation of the charging circuit will be briefly described with reference to fig. 5 as follows:
when the battery needs to be charged, the control circuit 14 outputs a low-level first control signal or does not output the first control signal, controls the first triode Q1 of the first switch circuit 12 to be turned off, and through the two voltage dividing resistors (the third resistor R3 and the fourth resistor R4) of the first voltage transformation circuit 11, the first voltage transformation circuit 11 (at the first end of the fourth resistor R4) generates a high-level first voltage transformation enabling signal to enable the first voltage transformation chip U1 to perform voltage boosting processing on the input voltage (12VDC _ IN) so as to generate a first voltage 14V (which is larger than the voltage of the fully charged battery); meanwhile, the control circuit 14 generates a second control signal of the first level to enable the second transformer chip U2, and performs voltage reduction processing on the first voltage to generate a charging voltage BAT _ CHARGE of 3.3V (or 5V) to stably and effectively CHARGE the battery.
The control circuit 14 monitors the condition of the battery voltage through the battery voltage detection circuit 13, detects the battery temperature and the temperature of the charging circuit through the temperature detection circuit 16, and the second voltage transformation circuit 15 can also detect the conditions of the charging voltage and the charging current and combine the temperature detection signal to generate a charging state signal to be fed back to the control circuit 14; under the conditions of full charge or abnormal charging or abnormal temperature, when the charging circuit needs to be turned off, the control circuit 14 generates a first control signal with a high level, controls the conduction of the first triode Q1 of the first switch circuit 12, and pulls down the level of the first end of the fourth resistor R4, that is, the second end of the fourth resistor R4 generates a first transformation enabling signal with a low level, so that the first transformation chip U1 is enabled to stop converting the input voltage into the first voltage; at the same time, the control circuit 14 generates a second control signal of a second level to enable the second transformer chip U2 to stop generating the charging voltage, thereby stopping charging the battery.
A second aspect of the embodiments of the present invention provides a mobile power source, including the above-mentioned charging circuit.
In specific implementation, the portable power source is a portable electronic device capable of storing and releasing electric energy, and can convert an input direct current voltage into a charging voltage or a charging current to charge a small portable electronic device and an electronic appliance (such as a wireless phone and a notebook computer) so as to meet power consumption requirements of the electronic device and the electronic appliance.
The embodiment of the utility model provides a can realize converting the voltage that less input voltage conversion is higher than the battery full charge into charging voltage again and charge to the battery high efficiency, effectively reduce calorific capacity in the charging process, reduce the power consumption potential safety hazard when charging the battery; meanwhile, the charging time is shortened, the charging efficiency is improved, the charging device is suitable for a large input voltage range, and the compatibility and the practicability of the mobile power supply are improved.
A third aspect of the embodiments of the present invention provides a robot, including the above-mentioned portable power source.
In a specific implementation, the energy system of the robot includes the mobile power supply described above, so as to provide energy for all the control subsystems and the driving and executing subsystems, and can be detached and moved, so as to charge the robot for supplementing electric energy.
The robot provided by the embodiment of the utility model is convenient to charge, can efficiently charge according to smaller input voltage, is suitable for a larger input voltage range, and has high charging efficiency and short charging time; meanwhile, the heating value of the battery power supply of the robot in the charging process is reduced, the potential safety hazard of electricity utilization is reduced, and the reliability and the practicability of the robot are improved.
It will be appreciated by those of ordinary skill in the art that the embodiments herein and shown are non-limiting examples, and thus, it can be appreciated that the specific structural and functional details disclosed herein may be representative and do not necessarily limit the scope of the embodiments. Although certain embodiments have been described above with a certain degree of particularity, those skilled in the art could make numerous alterations to the disclosed embodiments without departing from the scope of this disclosure. Joinder references (e.g., attached, coupled, connected, and the like) are to be construed broadly and may include intermediate members between a connection of elements and relative movement between elements. Thus, connection references do not necessarily imply that two elements are directly connected/coupled and in a fixed relationship to each other. It is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative only and not limiting. Changes in detail or structure may be made without departing from the disclosure.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A charging circuit, comprising:
a first switching circuit configured to generate a first transformation enable signal according to a first control signal;
the first transformation circuit is connected with the first switch circuit and is configured to perform voltage conversion on an input voltage according to the first transformation enabling signal so as to generate a first voltage;
the battery voltage detection circuit is connected with a battery and is configured to detect the voltage of the battery to generate a battery voltage detection signal;
a control circuit connected to the first switching circuit and the battery voltage detection circuit, and configured to generate the first control signal and the second control signal according to the battery voltage detection signal;
and the second voltage transformation circuit is connected with the first voltage transformation circuit and the control circuit and is configured to perform voltage conversion on the first voltage according to the second control signal so as to generate a charging voltage.
2. The charging circuit of claim 1, further comprising:
the temperature detection circuit is connected with the second voltage transformation circuit and is configured to detect the temperature of the battery to generate a temperature detection signal;
the second voltage transformation circuit is further configured to generate a charge state signal according to the charge voltage and the temperature detection signal;
the control circuit is specifically configured to generate the first control signal and the second control signal according to the battery voltage detection signal and the state of charge signal.
3. The charging circuit of claim 1, further comprising:
the first filtering circuit is connected with the first voltage transformation circuit and is configured to filter and reduce noise of the input voltage;
the second filter circuit is connected with the first voltage transformation circuit and the second voltage transformation circuit and is configured to filter and reduce noise of the first voltage;
and the third filter circuit is connected with the second voltage transformation circuit and the battery and is configured to filter and reduce the noise of the charging voltage.
4. The charging circuit of claim 1, further comprising:
and the reverse connection prevention protection circuit is connected with the first transformation circuit and the second transformation circuit and is configured to perform reverse connection protection on the first voltage.
5. The charging circuit of claim 1, wherein the first switching circuit comprises: the circuit comprises a first resistor, a second resistor, a first capacitor and a first triode;
the first end of the first resistor is a first control signal input end of the first switch circuit;
the second end of the first resistor is connected with the first end of the second resistor, the first end of the first capacitor and the base electrode of the first triode, and the second end of the second resistor, the second end of the first capacitor and the emitter electrode of the first triode are connected with a power ground;
the collector of the first triode is the first transformation enabling signal output end of the first switching circuit.
6. The charging circuit of claim 1, wherein the first transformation circuit comprises: the circuit comprises a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor and a first transformation chip;
the first end of the third resistor and the voltage input end of the first transformation chip are connected with an input voltage, the switch control end of the first transformation chip and the first end of the seventh resistor are connected with the first voltage, the second end of the seventh resistor is connected with the first end of the fourth capacitor, the second end of the fourth capacitor is connected with the bootstrap end of the first transformation chip, the second end of the third resistor is connected with the first end of the fourth resistor and the enable end of the first transformation chip, the mode selection end of the first transformation chip is connected with the second end of the fifth resistor and the first end of the sixth resistor, the power supply end of the first transformation chip is connected with the first end of the fifth resistor and the first end of the second capacitor, the ground end of the first transformation chip is connected with the first end of the third capacitor, the second end of the fourth resistor, the switch control end of the first transformation chip and the first end of the seventh resistor are connected with the bootstrap end of the first capacitor, the second end of the fourth resistor is connected, A second end of the sixth resistor, a second end of the second capacitor and a second end of the third capacitor are connected with a power ground;
the ground end of the first transformation chip is connected with a power ground, the error amplification output end of the first transformation chip is connected with the first end of the fifth capacitor, the second end of the fifth capacitor is connected with the first end of the eighth resistor, the feedback input end of the first transformation chip is connected with the first end of the ninth resistor and the second end of the tenth resistor, the output end of the first transformation chip is connected with the first end of the tenth resistor, and the second end of the eighth resistor and the second end of the ninth resistor are connected with the power ground;
the first end of the fourth resistor and the enable end of the first transformer chip are jointly formed into a first transformer enable signal input end of the first transformer circuit;
the output end of the first voltage transformation chip is a first voltage output end of the first voltage transformation circuit.
7. The charging circuit of claim 1, wherein the second transformation circuit comprises: the second transformer chip, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a first inductor and a first diode;
a first end of the twelfth resistor is connected with a second voltage, a second end of the twelfth resistor is connected with a first end of the fifteenth resistor and a first end of the eighth resistor, a second end of the fifteenth resistor is connected with a thermistor input end of the second transformer chip, an enable end of the second transformer chip is connected with a second end of the sixteenth resistor, a first end of the sixteenth resistor is connected with a first end of the seventh capacitor and a first end of the eleventh resistor, a second end of the seventh capacitor, a second end of the eleventh resistor and a second end of the eighth capacitor are connected with a power ground, a battery number signal input end of the second transformer chip is connected with a first end of the thirteenth resistor, a reference voltage end of the second transformer chip is connected with a first end of the fourteenth resistor, a second end of the thirteenth resistor, a reference voltage end of the twelfth resistor, a second end of the fifteenth resistor, a first end of the fifteenth resistor and a second end of the eighth resistor, The first end of the sixth capacitor is connected, the second end of the fourteenth resistor is connected with the charging state indicating end of the second transformer chip, the power end of the second transformer chip and the voltage input end of the second transformer chip are connected with the first voltage, and the ground end of the second transformer chip is connected with the power ground;
the counting period setting end of the second transformer chip is connected with the first end of the thirteenth capacitor, the voltage compensation end of the second transformer chip is connected with the first end of the twentieth resistor, the second end of the twentieth resistor is connected with the first end of the twelfth capacitor, the current compensation end of the second transformer chip is connected with the first end of the nineteenth resistor, the second end of the nineteenth resistor is connected with the first end of the eleventh capacitor, the second end of the thirteenth capacitor, the second end of the twelfth capacitor and the second end of the eleventh capacitor are connected with a power ground, the battery voltage detection end of the second transformer chip is connected with the second end of the eighteenth resistor, and the battery charging current detection end of the second transformer chip is connected with the first end of the eighteenth resistor and the second end of the first inductor, a bootstrap end of the second transformer chip is connected with a first end of the seventeenth resistor, a second end of the seventeenth resistor is connected with a first end of the tenth capacitor, a second end of the tenth capacitor is connected with a cathode of the first diode and a second end of the first inductor, an anode of the first diode is connected with a power ground, and a switch output end of the second transformer chip is connected with a first end of the first inductor;
the charging state indicating end of the second voltage transformation chip is a charging state signal output end of the second voltage transformation circuit;
the first end of the fifteenth resistor is a temperature detection signal input end of the second voltage transformation circuit;
the first end of the sixteenth resistor is a second control signal input end of the second voltage transformation circuit;
and the second end of the eighteenth resistor is a charging voltage output end of the second voltage transformation circuit.
8. The charging circuit of claim 3, wherein the first filtering circuit comprises: a fourteenth capacitor and a second inductor;
a first end of the fourteenth capacitor is an input voltage input end of the first filter circuit, and a second end of the second inductor is an input voltage output end of the first filter circuit;
a first end of the fourteenth capacitor is connected to the first end of the second inductor, and a second end of the fourteenth capacitor is connected to a power ground.
9. A mobile power supply, characterized in that the mobile power supply comprises the charging circuit of any one of claims 1 to 8.
10. A robot characterized in that it comprises a mobile power supply according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922426523.3U CN211351756U (en) | 2019-12-27 | 2019-12-27 | Charging circuit, portable power source and robot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922426523.3U CN211351756U (en) | 2019-12-27 | 2019-12-27 | Charging circuit, portable power source and robot |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211351756U true CN211351756U (en) | 2020-08-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922426523.3U Active CN211351756U (en) | 2019-12-27 | 2019-12-27 | Charging circuit, portable power source and robot |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211351756U (en) |
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2019
- 2019-12-27 CN CN201922426523.3U patent/CN211351756U/en active Active
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