CN212435381U - Charging circuit and electric appliance - Google Patents
Charging circuit and electric appliance Download PDFInfo
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- CN212435381U CN212435381U CN202020915642.5U CN202020915642U CN212435381U CN 212435381 U CN212435381 U CN 212435381U CN 202020915642 U CN202020915642 U CN 202020915642U CN 212435381 U CN212435381 U CN 212435381U
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Abstract
The embodiment of the utility model provides a relate to electron electric power technical field, disclose a charging circuit and electrical apparatus, this charging circuit is including setting up the current sampling circuit on the generating line and two at least charging sub-circuit that connect in parallel on the generating line, and charging sub-circuit includes: step-down circuit, voltage sampling circuit and control chip export the low level when control chip passes through voltage sampling circuit and can not detect the pressure drop of battery package, output pulse signal when detecting the pressure drop to according to the current value adjustment this pulse signal's of voltage drop value and current sampling circuit collection duty cycle, with the modulation that realizes charging power, the utility model provides a charging circuit can be according to the quantity adjustment charging power of current battery package, and charging efficiency is high.
Description
Technical Field
The embodiment of the utility model provides a relate to electron electric power technical field, in particular to charging circuit and electrical apparatus.
Background
In the situation that electric appliances using batteries as power are more and more popular, it is a normal state to arrange a plurality of battery packs in the electric appliances in order to improve the cruising ability of the electric appliances, and such electric appliances generally need to purchase a charger with a plurality of output ports for charging when the electric quantity of one or more battery packs is exhausted.
In implementing the embodiments of the present invention, the inventor finds that there are at least the following problems in the above related art: in the existing multi-output-port charger, each output port and the charging circuit thereof are usually designed as an independent module, and a battery pack is charged independently, the output power of each independent charging module is fixed, the charging power cannot be adjusted according to the number of the current battery packs, and the charging efficiency is not high.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned defect of prior art, the embodiment of the utility model provides a charging circuit and electrical apparatus that charge efficiency is high are provided.
The embodiment of the utility model provides an aim at is realized through following technical scheme:
in order to solve the above technical problem, in a first aspect, the embodiment of the present invention provides a charging circuit, which is provided with a power input end for being connected with a dc power supply, including:
a current sampling circuit disposed on a bus of the charging circuit, and,
at least two charging sub-circuits connected in parallel on the bus, each of the charging sub-circuits comprising:
the input end of the voltage reduction circuit is connected with the power supply input end;
the input end of the voltage sampling circuit is connected with the output end of the voltage reduction circuit, and the output end of the voltage sampling circuit is used for being connected with the battery pack;
a control chip, the current sampling port of which is connected with the current sampling circuit, the voltage sampling port of which is connected with the voltage sampling circuit, and the output end of which is connected with the control end of the voltage reduction circuit,
the control chip is used for outputting a low level when the voltage sampling port cannot detect the voltage drop of the battery pack, or outputting a pulse signal when the voltage sampling port detects the voltage drop of the battery pack, and adjusting the duty ratio of the pulse signal according to the voltage drop value and the bus current value acquired by the current sampling circuit.
In some embodiments, the voltage reduction circuit includes:
the input end of the first switching tube is connected with the power supply input end;
the input end of the second switching tube is connected with the output end of the first switching tube, and the output end of the second switching tube is used for being connected with the negative electrode of the battery pack;
the input end of the voltage reduction inductor is connected between the output end of the first switch tube and the input end of the second switch tube, and the output end of the voltage reduction inductor is connected with the input end of the voltage sampling circuit;
and the input end of the driving chip is connected with the output end of the control chip, the first output end of the driving chip is connected with the control end of the first switch tube, the second output end of the driving chip is connected with the control end of the second switch tube, the driving chip is used for outputting periodic high and low levels according to the pulse signals, and the levels of the first output end and the second output end are opposite.
In some embodiments, the voltage reduction circuit further comprises:
and the anode of the voltage stabilizing capacitor is connected with the input end of the first switch tube, and the cathode of the voltage stabilizing capacitor is connected with the output end of the second switch tube.
In some embodiments, the first switch tube and the second switch tube are NMOS tubes.
In some embodiments, the voltage sampling circuit comprises:
the input end of the first voltage-dividing resistor is connected with the output end of the voltage-reducing circuit, the input end of the first voltage-dividing resistor is also used for being connected with the anode of the battery pack, and the output end of the first voltage-dividing resistor is connected with the voltage sampling port;
and the input end of the second voltage-dividing resistor is connected with the output end of the first voltage-dividing resistor, and the output end of the second voltage-dividing resistor is used for being connected with the negative electrode of the battery pack.
In some embodiments, the current sampling circuit comprises:
and one end of the current sampling resistor is connected with the power input end, and the other end of the current sampling resistor is connected with the input end of the voltage reduction circuit.
In some embodiments, the charging sub-circuit further comprises:
and the input end of the rectifying circuit is connected with the output end of the voltage reduction circuit, and the output end of the rectifying circuit is connected with the input end of the voltage sampling circuit.
In some embodiments, the rectifier circuit comprises:
the input end of the rectifying diode is connected with the output end of the voltage reduction circuit, and the output end of the rectifying diode is connected with the input end of the voltage sampling circuit;
and the anode of the filter capacitor is connected with the input end of the rectifier diode, and the cathode of the filter capacitor is used for being connected with the cathode of the battery pack.
In some embodiments, the charging circuit further comprises:
and the safety circuit is arranged on a bus of the charging circuit and is connected with the current sampling circuit in series.
In order to solve the above technical problem, in a second aspect, the embodiment of the present invention provides an electrical appliance, including: at least two battery packs, and a charging circuit as described in the above first aspect, the charging circuit comprising: the power input end is used for being connected with a direct current power supply, and each power output end is connected with one battery pack.
Compared with the prior art, the beneficial effects of the utility model are that: be different from prior art's condition, the embodiment of the utility model provides a charging circuit is provided, it includes current sampling circuit and two at least charging sub-circuit that connect in parallel on the generating line that set up on the generating line, and charging sub-circuit includes: step-down circuit, voltage sampling circuit and control chip export the low level when control chip passes through voltage sampling circuit and can not detect the pressure drop of battery package, output pulse signal when detecting the pressure drop to according to the current value adjustment this pulse signal's of voltage drop value and current sampling circuit collection duty cycle, with the modulation that realizes charging power, the utility model provides a charging circuit can be according to the quantity adjustment charging power of current battery package, and charging efficiency is high.
Drawings
One or more embodiments are illustrated by the accompanying figures in the drawings that correspond thereto and are not to be construed as limiting the embodiments, wherein elements/modules and steps having the same reference numerals are represented by like elements/modules and steps, unless otherwise specified, and the drawings are not to scale.
Fig. 1 is a schematic structural diagram of an electrical appliance according to an embodiment of the present invention;
fig. 2 is an electrical schematic block diagram of a charging circuit according to an embodiment of the present invention;
fig. 3 is an electrical schematic block diagram of another charging circuit provided by an embodiment of the present invention;
fig. 4 is a schematic circuit structure diagram of a charging circuit according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further 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 present application and are not intended to limit the present application.
It should be noted that, if not conflicted, the various features of the embodiments of the invention can be combined with each other and are within the scope of protection of the present application. In addition, although the functional blocks are divided in the device diagram, in some cases, the blocks may be divided differently from those in the device. Further, the terms "first," "second," and the like, as used herein, do not limit the data and the execution order, but merely distinguish the same items or similar items having substantially the same functions and actions.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
In order to solve the problem that current charging circuit can't be according to current battery package quantity rational distribution charging power, inefficiency, the embodiment of the utility model provides an electrical apparatus please see fig. 1, it shows the embodiment of the utility model provides a structural schematic diagram of an electrical apparatus that provides, this electrical apparatus 200 includes: at least two battery packs and a charging circuit 100, the charging circuit 100 comprising: a power input terminal P1 and at least two power output terminals P5, the power input terminal P1 is used for DC connection with DC power, and each power output terminal P5 is connected with one battery pack.
Specifically, the embodiments of the present invention will be further explained with reference to the drawings.
An embodiment of the present invention provides a charging circuit, please refer to fig. 2, which shows an embodiment of the present invention provides an electrical schematic block diagram of a charging circuit, the charging circuit 100 includes: a current sampling circuit 110 and at least two charging electronic circuits 120. The current sampling circuit 110 is disposed on a bus of the charging circuit 100, and the at least two charging electronic circuits 120 are connected in parallel on the bus of the charging circuit 100. It should be noted that, the embodiment of the present invention further describes two charging circuits 120 as an example, and in practical use, the number of the charging circuits 120 may be set according to use requirements.
Each of the charging circuits 120 includes: the voltage-reducing circuit 121, the voltage sampling circuit 122 and the control chip U1. The input terminal of the voltage-reducing circuit 121 is connected to the power input terminal P1. The input end of the voltage sampling circuit 122 is connected with the output end of the voltage reduction circuit 121, and the output end of the voltage sampling circuit 122 is used for being connected with a battery pack. The current sampling port P2 of the control chip U1 is connected to the current sampling circuit 110, the voltage sampling port P3 thereof is connected to the voltage sampling circuit 122, and the output end thereof is connected to the control end of the voltage step-down circuit 121.
The control chip U1 is configured to output a low level when the voltage sampling port P3 does not detect a voltage drop of the battery pack, or output a pulse signal when the voltage sampling port P3 detects a voltage drop of the battery pack, and adjust a duty ratio of the pulse signal according to a value of the voltage drop and a bus current value collected by the current sampling circuit 110.
The embodiment of the utility model provides a charging circuit, it is including setting up the current sampling circuit on the generating line and two at least charging sub-circuit that connect in parallel on the generating line, and charging sub-circuit includes: step-down circuit, voltage sampling circuit and control chip export the low level when control chip passes through voltage sampling circuit and can not detect the pressure drop of battery package, output pulse signal when detecting the pressure drop to according to the current value adjustment this pulse signal's of voltage drop value and current sampling circuit collection duty cycle, with the modulation that realizes charging power, the utility model provides a charging circuit can be according to the quantity adjustment charging power of current battery package, and charging efficiency is high.
In some embodiments, referring to fig. 3, an electrical schematic block diagram of another charging circuit provided by the embodiments of the present invention is shown, based on the structure and the electrical connection relationship of the charging circuit 100 shown in fig. 2,
the charging circuit 120 further comprises: and a rectifying circuit 123 having an input terminal connected to the output terminal of the voltage step-down circuit 12 and an output terminal connected to the input terminal of the voltage sampling circuit 122.
The charging circuit 100 further includes: a safety circuit 130 disposed on a bus of the charging circuit 100 and connected in series with the current sampling circuit 110.
In some embodiments, please refer to fig. 4, which illustrates a schematic circuit structure diagram of a charging circuit 100 according to an embodiment of the present invention, based on the electrical principle of the charging circuit 100 shown in fig. 2 and fig. 3, the charging circuit 100 includes, but is not limited to, the following circuit structures and devices:
the voltage-reducing circuit 121 includes: the circuit comprises a first switch tube Q1, a second switch tube Q3 and a step-down inductor L1.
The input end of the first switch tube Q1 is connected with the power supply input end P1. The input end of the second switch tube Q3 is connected with the output end of the first switch tube Q1, and the output end of the second switch tube Q3 is used for being connected with the negative pole of the battery pack. The input end of the step-down inductor L1 is connected between the output end of the first switch Q1 and the input end of the second switch Q3, and the output end of the step-down inductor L1 is connected to the input end of the voltage sampling circuit 122. The output terminal of the step-down inductor L1 is the output terminal of the step-down circuit 121.
The first switch tube Q1 and the second switch tube Q3 are NMOS tubes. The drain of the first switch transistor Q1 is the input terminal of the first switch transistor Q1 and the input terminal of the voltage-reducing circuit 121, the source of the first switch transistor Q1 is the output terminal of the first switch transistor Q1, and the gate of the first switch transistor Q1 is the control terminal of the first switch transistor Q1. The drain of the second switching tube Q3 is the input end of the second switching tube Q3, the source of the second switching tube Q3 is the output end of the second switching tube Q3, and the gate of the second switching tube Q3 is the control end of the second switching tube Q3.
The input end of the driving chip U3 is connected to the output end of the control chip U1, the first output end thereof is connected to the control end of the first switch tube Q1, the second output end thereof is connected to the control end of the second switch tube Q3, the driving chip U3 is configured to output a periodic high and low level according to the pulse signal, and the level of the first output end is opposite to that of the second output end.
In some embodiments, the voltage dropping circuit 121 further includes: and the anode of the voltage-stabilizing capacitor C1 is connected with the input end of the first switching tube Q1, and the cathode of the voltage-stabilizing capacitor C1 is connected with the output end of the second switching tube Q3.
In some embodiments, the voltage sampling circuit 122 includes:
an input end of the first voltage-dividing resistor R1 is connected to an output end of the voltage-reducing circuit 121, an input end of the first voltage-dividing resistor R1 is further used for being connected to an anode of the battery pack, and an output end of the first voltage-dividing resistor R1 is connected to the voltage sampling port VF. The input terminal of the first voltage dividing resistor R1 is the input terminal and the output terminal of the voltage sampling circuit 122.
An input end of the second voltage-dividing resistor R2 is connected with an output end of the first voltage-dividing resistor R1, and an output end of the second voltage-dividing resistor R2 is used for being connected with a negative electrode of the battery pack. The output end of the second voltage-dividing resistor R2 is the input end and the output end of the voltage sampling circuit 122.
In some embodiments, the current sampling circuit 110 includes: and one end of the current sampling resistor R5 is connected with the power supply input end P1, and the other end of the current sampling resistor R5 is connected with the input end of the voltage reduction circuit 121. And the current sampling port CS of the control chip U1 is connected with the other end of the current sampling resistor R5.
In some embodiments, the rectifying circuit 123 includes:
a rectifying diode D1, wherein an input terminal of the rectifying diode D1 is connected with the output terminal of the voltage-reducing circuit 121, and an output terminal of the rectifying diode D1 is connected with the input terminal of the voltage sampling circuit 122.
And the anode of the filter capacitor C3 is connected with the input end of the rectifier diode D1, and the cathode of the filter capacitor C3 is used for being connected with the cathode of the battery pack.
In some embodiments, the safety circuit 130 includes: and one end of the Fuse is connected with the power input end P1, and the other end of the Fuse is connected with the input end of the voltage reduction circuit 121.
In the embodiment shown in fig. 4, when the charging circuit 100 works, the control chip U1 obtains the voltage drop of the battery pack through the voltage sampling port VF, and if the two control chips U1 and U2 all detect the voltage drop of the battery pack, the electric quantity of the two battery packs is determined according to the voltage drop of the battery pack, and the charging power is distributed according to the electric quantity of the battery pack by combining the system current collected by the current sampling port CS, and the driving chip U3 is controlled to output the pulse signal with the corresponding duty ratio; if only one control chip U1 or U2 detects the voltage drop of the battery pack, and if only one control chip U1 detects the voltage drop of the battery pack, the driving chip U5 is controlled to output a low level, and the driving chip U3 is controlled to output a pulse signal corresponding to the duty ratio of the maximum charging power of the system, so that the battery pack can be charged efficiently.
In practical use, the number of the battery packs and the charging sub-circuits 120 is not limited to the above embodiments, and may be set according to the use requirement.
The embodiment of the utility model provides an in provide a charging circuit and electrical apparatus, it is including setting up the current sampling circuit on the generating line and two at least charging sub-circuit that connect in parallel on the generating line, and charging sub-circuit includes: step-down circuit, voltage sampling circuit and control chip export the low level when control chip passes through voltage sampling circuit and can not detect the pressure drop of battery package, output pulse signal when detecting the pressure drop to according to the current value adjustment this pulse signal's of voltage drop value and current sampling circuit collection duty cycle, with the modulation that realizes charging power, the utility model provides a charging circuit can be according to the quantity adjustment charging power of current battery package, and charging efficiency is high.
It should be noted that the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments can be combined, steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. A charging circuit having a power input for connection to a dc power source, comprising:
a current sampling circuit disposed on a bus of the charging circuit, and,
at least two charging sub-circuits connected in parallel on the bus, each of the charging sub-circuits comprising:
the input end of the voltage reduction circuit is connected with the power supply input end;
the input end of the voltage sampling circuit is connected with the output end of the voltage reduction circuit, and the output end of the voltage sampling circuit is used for being connected with the battery pack;
a control chip, the current sampling port of which is connected with the current sampling circuit, the voltage sampling port of which is connected with the voltage sampling circuit, and the output end of which is connected with the control end of the voltage reduction circuit,
the control chip is used for outputting a low level when the voltage sampling port cannot detect the voltage drop of the battery pack, or outputting a pulse signal when the voltage sampling port detects the voltage drop of the battery pack, and adjusting the duty ratio of the pulse signal according to the voltage drop value and the bus current value acquired by the current sampling circuit.
2. The charging circuit of claim 1, wherein the voltage-reduction circuit comprises:
the input end of the first switching tube is connected with the power supply input end;
the input end of the second switching tube is connected with the output end of the first switching tube, and the output end of the second switching tube is used for being connected with the negative electrode of the battery pack;
the input end of the voltage reduction inductor is connected between the output end of the first switch tube and the input end of the second switch tube, and the output end of the voltage reduction inductor is connected with the input end of the voltage sampling circuit;
and the input end of the driving chip is connected with the output end of the control chip, the first output end of the driving chip is connected with the control end of the first switch tube, the second output end of the driving chip is connected with the control end of the second switch tube, the driving chip is used for outputting periodic high and low levels according to the pulse signals, and the levels of the first output end and the second output end are opposite.
3. The charging circuit of claim 2, wherein the voltage-reducing circuit further comprises:
and the anode of the voltage stabilizing capacitor is connected with the input end of the first switch tube, and the cathode of the voltage stabilizing capacitor is connected with the output end of the second switch tube.
4. The charging circuit of claim 2,
the first switch tube and the second switch tube are NMOS tubes.
5. The charging circuit of claim 1, wherein the voltage sampling circuit comprises:
the input end of the first voltage-dividing resistor is connected with the output end of the voltage-reducing circuit, the input end of the first voltage-dividing resistor is also used for being connected with the anode of the battery pack, and the output end of the first voltage-dividing resistor is connected with the voltage sampling port;
and the input end of the second voltage-dividing resistor is connected with the output end of the first voltage-dividing resistor, and the output end of the second voltage-dividing resistor is used for being connected with the negative electrode of the battery pack.
6. The charging circuit of claim 1, wherein the current sampling circuit comprises:
and one end of the current sampling resistor is connected with the power input end, and the other end of the current sampling resistor is connected with the input end of the voltage reduction circuit.
7. The charging circuit of any of claims 1-6, wherein the charging circuit further comprises:
and the input end of the rectifying circuit is connected with the output end of the voltage reduction circuit, and the output end of the rectifying circuit is connected with the input end of the voltage sampling circuit.
8. The charging circuit according to claim 7, wherein the rectifying circuit comprises:
the input end of the rectifying diode is connected with the output end of the voltage reduction circuit, and the output end of the rectifying diode is connected with the input end of the voltage sampling circuit;
and the anode of the filter capacitor is connected with the input end of the rectifier diode, and the cathode of the filter capacitor is used for being connected with the cathode of the battery pack.
9. The charging circuit of any of claims 1-6, further comprising:
and the safety circuit is arranged on a bus of the charging circuit and is connected with the current sampling circuit in series.
10. An electrical appliance, comprising: at least two battery packs, and a charging circuit as claimed in any one of claims 1 to 9, the charging circuit comprising: the power input end is used for being connected with a direct current power supply, and each power output end is connected with one battery pack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020915642.5U CN212435381U (en) | 2020-05-26 | 2020-05-26 | Charging circuit and electric appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020915642.5U CN212435381U (en) | 2020-05-26 | 2020-05-26 | Charging circuit and electric appliance |
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| Publication Number | Publication Date |
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| CN212435381U true CN212435381U (en) | 2021-01-29 |
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| CN202020915642.5U Active CN212435381U (en) | 2020-05-26 | 2020-05-26 | Charging circuit and electric appliance |
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| CN (1) | CN212435381U (en) |
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- 2020-05-26 CN CN202020915642.5U patent/CN212435381U/en active Active
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Address after: 518000 19th floor, building 1, kaidar group center building, No. 168, Tongsha Road, Xinwei community, Xili street, Nanshan District, Shenzhen, Guangdong Patentee after: Shenzhen Delian Minghai New Energy Co.,Ltd. Address before: 701-3, building 2, kaidar group center building, 168 Tongsha Road, Xili street, Nanshan District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Poweroak Newener Co.,Ltd. |