Charging circuit of movable lamp and yard lamp

Abstract

The utility model provides a charging circuit of a movable lamp and a yard lamp, and relates to the technical field of charging, the charging circuit comprises a charging interface, a solar charging panel, a resistance dividing unit and a battery management module, the charging interface and the solar charging panel are connected with the battery management module through the resistance dividing unit, and the battery management module is connected with a lithium battery. Charging the lithium battery; the resistance dividing unit is further connected with the lithium battery and provides a second charging path for the charging interface and the solar charging panel, and the charging interface and the output end of the solar charging panel are connected with an anti-backflow diode in series. The charging circuit is applied to the yard lamp, a light-emitting surface is arranged on the outer side of the yard lamp, and the light-emitting surface comprises an LED module and is powered by the lithium battery. And a USB type interface is also arranged, so that the device can be used as a power bank for charging mobile equipment. According to the utility model, the dual-path charging is realized through the resistance dividing unit, the charging efficiency of the yard lamp is improved, the circuit structure is simple, the energy loss is small, the application scene of the lamp is widened, and the practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of charging, in particular to a charging circuit of a movable lamp and a garden lamp. Background Art

[0002] In the field of charging technology for portable devices, although high-efficiency battery management chips are increasingly developed, they are mostly adapted to high-voltage batteries, which undoubtedly adds unnecessary costs for some portable devices with low power consumption. At the same time, due to factors such as circuit design, compatibility, and customer demand, manufacturers will choose chip solutions that meet the market positioning of the product. As a result, the charging efficiency of some portable devices on the market is low due to the limitations of battery management chips. Although the existing technology has taken many measures, such as multi-channel charging with switching power supply circuits, there are also stability issues such as design complexity, energy loss, and additional failure points, which still cannot effectively solve the above problems. Utility Model Content

[0003] In order to overcome the defects of the prior art, the technical problem to be solved by the utility model is to propose a charging circuit for a movable lamp and a garden lamp, which adopts the following technical solutions:

[0004] A charging circuit for a movable lamp comprises a charging interface, a solar charging panel, a resistance dividing unit and a battery management module, wherein the charging interface and the solar charging panel are connected to the battery management module via the resistance dividing unit, and the battery management module is connected to a lithium battery and charges the lithium battery;

[0005] The above-mentioned resistance division unit is also connected to the above-mentioned lithium battery to provide a second charging path for the above-mentioned charging interface and the above-mentioned solar charging panel;

[0006] The output end of the charging interface is connected in series with a diode for preventing current backflow;

[0007] The output end of the solar charging panel is connected in series with a diode for preventing current backflow.

[0008] As a further improvement, the above-mentioned resistance-dividing unit includes a first input end, a second input end, a first output end and a second output end, the positive pole of the above-mentioned solar charging panel is connected to the above-mentioned first output end, the positive pole of the above-mentioned charging interface is connected to the above-mentioned second input end, the above-mentioned charging interface and the above-mentioned solar charging panel are connected to the above-mentioned battery management module through the above-mentioned first output end, and are connected to the above-mentioned lithium battery through the above-mentioned second output end.

[0009] As a further improvement, a voltage-dividing resistor R1 is connected in series between the first input terminal and the second input terminal, the second input terminal is connected to the first output terminal, a diode D3 is connected in series between the second input terminal and the second output terminal, the anode of the diode D3 is close to the second input terminal, and a voltage-dividing resistor R4 is connected in series between the first input terminal and the second output terminal.

[0010] As a further improvement, a protection resistor R5 is connected in series between the second input terminal and the second output terminal.

[0011] As a further improvement, the second output terminal is further connected to a voltage stabilizing diode DZ1 for preventing surges, the cathode of the voltage stabilizing diode DZ1 is connected to the second output terminal, and the anode is grounded.

[0012] As a further improvement, the battery management module includes an IP9315 chip and its peripheral circuits, the first output terminal is connected to the VIN pin of the IP9315 chip, and the lithium battery is connected to the VBAT pin of the IP9315 chip.

[0013] As a further improvement, the charging interface is a Type-C interface with an output voltage of 5V and an output current of 2A; the output voltage of the solar charging panel is 6V and the power is 10W.

[0014] The utility model further provides a garden lamp, comprising a charging circuit of a movable lamp as described in any one of the above items, wherein the solar charging panel and the charging interface are arranged on the outer surface of the garden lamp.

[0015] A further improvement includes a light-emitting surface and a toggle switch, the toggle switch is used to control the light-emitting mode of the light-emitting surface, the light-emitting surface includes an LED module, the LED module includes a warm light LED lamp group and a cold light LED lamp group connected in parallel, and the LED module is electrically connected to the battery management module and the lithium battery.

[0016] As a further improvement, it also includes a USB type interface, which is connected to the VOUT pin of the IP9315 chip to supply power to an external device.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] First, the utility model adopts a dual-channel charging method of Type-C charging interface and solar charging panel. On the one hand, the Type-C charging interface and the solar charging panel charge the lithium battery by connecting the battery management chip, and on the other hand, the lithium battery is charged through the resistance-dividing unit. Under the restriction of the resistance-dividing unit, the Type-C charging interface and the solar charging panel can charge the lithium battery safely and stably, thereby improving the charging efficiency. At the same time, the circuit structure is simple and the loss is small.

[0019] Secondly, the utility model has diodes in series at the output ends of the Type-C charging interface and the solar charging panel for preventing current backflow, so that the Type-C charging interface and the solar charging panel can be powered safely and stably. At the same time, this structure makes the two power supplies more flexible in selecting the output voltage. Furthermore, a voltage regulator diode is also connected to the second output end to prevent surges caused by factors such as AC power fluctuations, which may cause battery damage.

[0020] Thirdly, the garden lamp proposed by the utility model uses the above charging circuit. As a movable lamp for outdoor use, the garden lamp can be connected to a power adapter to charge through the mains or a power bank, and can also be charged by receiving light from a solar panel. The outside of the garden lamp is provided with a light-emitting surface and a toggle switch, which can switch between different light-emitting modes. It is also provided with a USB interface, which can be used as a power bank to charge mobile devices. Through the above scheme, the charging efficiency of the garden lamp is improved, its application scenarios are effectively broadened, and its practicality is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the following is a brief introduction to the drawings required for use in the implementation mode. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic block diagram of the overall structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the circuit structure of the charging circuit of the utility model;

[0024] Figure 3 This is a schematic diagram of the circuit structure of the resistance division unit of the utility model;

[0025] Figure 4 This is a schematic diagram of the circuit structure of a lithium battery load end according to an embodiment of the utility model;

[0026] Figure 5 This is a schematic diagram of the overall structure of the garden lamp of the utility model;

[0027] Figure 6 The utility model is a schematic diagram of the use state of the garden lamp.

[0028] Reference numerals:

[0029] 1-Charging port; 2-Solar charging panel; 3-Resistor division unit; 4-Battery management module; 5-Lithium battery; 6-LED module;

[0030] 31i - first input terminal; 32i - second input terminal; 31o - first output terminal; 32o - second output terminal;

[0031] 600-luminous surface; 601-slide switch; 700-USB interface. DETAILED DESCRIPTION

[0032] In order to facilitate understanding by those skilled in the art, the structure of the present invention is further described in detail with reference to the accompanying drawings:

[0033] In the description of the present invention, the terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. The orientation or position relationship indicated by the terms "portion", "side", "end", etc. is based on the orientation or position relationship shown in the drawings and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0034] like Figure 1 and Figure 2 As shown, the present application provides a charging circuit for a movable lamp, including a charging interface 1, a solar charging panel 2, a resistor unit 3 and a battery management module 4, the charging interface 1 and the solar charging panel 2 are connected to the battery management module 4 through the resistor unit 3, the battery management module 4 is connected to the lithium battery 5, and charges the lithium battery 5; the resistor unit 3 is also connected to the lithium battery 5, and charges the lithium battery 5; the output end of the charging interface 1 is connected in series with a diode for preventing current backflow; the output end of the solar charging panel 2 is connected in series with a diode for preventing current backflow.

[0035] In a specific embodiment, the charging interface 1 is a Type-C charging interface 1 with an output voltage of 5V and an output current of 2A; the output voltage of the solar panel is 6V and the output power is 10W; the battery management module 4 includes an IP9315 chip and its peripheral circuits.

[0036] Furthermore, the power supply interface of Type-C and the input positive pole PV+ of the solar charging panel 2 are both connected to the resistor unit 3, and the resistor unit 3 is connected to the VIN pin of the IP9315 chip, and the IP9315 chip charges the lithium battery 5 through the VBAT pin. On the other hand, the resistor unit 3 is connected to the lithium battery 5 to charge the lithium battery 5, and the lithium battery 5 is also connected to a load to power the load. Through the above structure, the device can be connected to the mains for charging through the Type-C charging interface 1, and can also receive solar energy for charging outdoors; on the other hand, the Type-C charging interface 1 and the solar charging panel 2 can also charge the lithium battery 5 from another charging branch, and under the protection of the anti-backflow diodes D1 and D2, the current of the branch is controlled to a reasonable value through the resistor unit 3, and the lithium battery 5 is charged safely and stably, which effectively improves the charging efficiency, and the overall circuit structure is simple and the energy loss is low.

[0037] Combination Figure 2 and Figure 3 The resistance division unit 3 includes a first input terminal 31i, a second input terminal 32i, a first output terminal 31o and a second output terminal 32o. The positive input terminal of the solar charging panel 2 is connected to the first output terminal 31o, the positive terminal of the charging interface 1 is connected to the second input terminal 32i, the charging interface 1 and the solar charging panel 2 are connected to the battery management module 4 through the first output terminal 31o, and are connected to the lithium battery 5 through the second output terminal 32o. The voltage of the lithium battery 5 is 3.7V and the capacity is 14AH.

[0038] like Figure 3 As shown, a voltage-dividing resistor R1 with a resistance value of 1-2.2Ω is connected in series between the first input terminal 31i and the second input terminal 32i, the second input terminal 32i is connected to the first output terminal 31o, a diode D3 is connected in series between the second input terminal 32i and the second output terminal 32o, the anode of the diode D3 is close to the second input terminal 32i, and a voltage-dividing resistor R4 with a resistance value of 1-2.2Ω is connected in series between the first input terminal 31i and the second output terminal 32o. A protection resistor R5 with a resistance value of 1-2.2Ω is also connected in series between the second input terminal 32i and the second output terminal 32o.

[0039] More specifically, the charging interface 1 is connected to the second input terminal 32i through the anti-backflow diode D2, and outputs from the second output terminal 32o after passing through the protection resistor R5 and the diode D3, and is connected to the positive electrode of the lithium battery 5; on the other hand, it is connected to the second input terminal 32i through the anti-backflow diode D2, and outputs from the first output terminal 31o to the VIN pin of the IP9315 chip, and the IP9315 chip charges the lithium battery 5 through the VBAT pin. The solar charging panel 2 is connected to the first input terminal 31i through the anti-backflow diode D1, and outputs from the second output terminal 32o through the voltage divider resistor R4, and is connected to the positive electrode of the lithium battery 5; on the other hand, after being connected to the first input terminal 31i, it outputs from the first output terminal 31o after passing through the voltage divider resistor R1, and is connected to the VIN pin of the IP9315 chip, and the IP9315 chip charges the lithium battery 5 through the VBAT pin.

[0040] like Figure 2 As shown, the second output terminal 32o is also connected to a voltage stabilizing diode DZ1 for preventing surges, the cathode of the voltage stabilizing diode DZ1 is connected to the second output terminal 32o, and the anode is grounded. Specifically, the voltage stabilizing value of the voltage stabilizing diode DZ1 is 5.1V. When the voltage of the second output terminal 32o fluctuates instantaneously due to equipment startup, city power fluctuations, etc., and the voltage exceeds 5.1V, the voltage stabilizing diode DZ1 conducts in the reverse direction, pulling the voltage at this point down to the ground potential, thereby preventing the lithium battery 5 and other circuit components from being damaged by excessive voltage.

[0041] The utility model further provides a garden lamp, comprising a charging circuit of the movable lamp as described above, such as Figure 5 and Figure 6 The garden light includes a Type-C charging interface 1 , a USB interface 700 , a toggle switch 601 , a light-emitting surface 600 and a solar charging panel 2 .

[0042] like Figure 2 As shown, the VOUT pin of the IP9315 chip is connected to the above-mentioned USB interface 700, which is used to power external devices. The IP9315 chip is also provided with an LED pin for connecting four LED indicators. When the power is ≥75%, all four LED indicators light up, and when the power is <75%, <50%, and <25%, one LED indicator light goes out respectively. When the power is <3%, the last LED indicator light flashes.

[0043] like Figure 4The circuit structure diagram of the load end of a lithium battery 5 of a garden lamp is shown. The lithium battery 5 is connected to an LED module 6 through a protection resistor R6. The LED module 6 includes a warm light LED lamp group and a cold light LED lamp group connected in parallel. The LED module 6 is controlled by the above-mentioned toggle switch 601, which can control the light-emitting surface 600 to switch between warm light mode, cold light mode and warm light + cold light mode. In particular, combined with Figure 2 and Figure 4 The second output terminal 32 o is directly connected to the LED module 6 . When the lithium battery 5 fails or is not connected, the charging interface 1 and the solar charging panel 2 can directly power the LED module 6 .

[0044] In a specific embodiment, referring to Figure 4 The warm light LED lamp group is composed of several LED-W connected in parallel, and each branch is also connected in series with a protection resistor R; the cold light LED lamp group has the same structure as the warm light LED lamp group, and is composed of multiple LED-C and a protection resistor R. The LED module 6 forms a light-emitting surface 600, which is arranged on the front side of the garden lamp, and the rear side is a solar charging panel 2.

[0045] like Figure 5 As shown, the garden light is tiltedly supported by a bracket, and the Type-C charging port 1, USB port 700, toggle switch 601 and LED indicator light are arranged on the upper end.

[0046] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A charging circuit for a movable lamp, characterized in that: include A charging interface (1), a solar charging panel (2), a resistance-sharing unit (3) and a battery management module (4), wherein the charging interface (1) and the solar charging panel (2) are connected to the battery management module (4) via the resistance-sharing unit (3), and the battery management module (4) is connected to a lithium battery (5) and charges the lithium battery (5); The resistance dividing unit (3) is also connected to the lithium battery (5) to provide a second charging path for the charging interface and the solar charging panel; The output end of the charging interface (1) is connected in series with a diode (D2) for preventing current backflow; The output end of the solar charging panel (2) is connected in series with a diode (D1) for preventing current backflow.

2. A charging circuit for a movable lamp as claimed in claim 1, characterized in that: The resistance-dividing unit (3) comprises a first input end (31i), a second input end (32i), a first output end (31o) and a second output end (32o); the positive pole of the solar charging panel (2) is connected to the first output end (31o); the positive pole of the charging interface (1) is connected to the second input end (32i); the charging interface (1) and the solar charging panel (2) are connected to the battery management module (4) via the first output end (31o), and are connected to the lithium battery (5) via the second output end (32o).

3. A charging circuit for a movable lamp as claimed in claim 2, characterized in that: A voltage-dividing resistor (R1) is connected in series between the first input terminal (31i) and the second input terminal (32i), the second input terminal (32i) is connected to the first output terminal (31o), a diode (D3) is connected in series between the second input terminal (32i) and the second output terminal (32o), the anode of the diode (D3) is close to the second input terminal (32i), and a voltage-dividing resistor (R4) is connected in series between the first input terminal (31i) and the second output terminal (32o).

4. A charging circuit for a movable lamp as claimed in claim 3, characterized in that: A protective resistor (R5) is also connected in series between the second input terminal (32i) and the second output terminal (32o).

5. A charging circuit for a movable lamp as claimed in claim 3 or 4, characterized in that: The second output end (32o) is also connected to a voltage-stabilizing diode (DZ1) for preventing surges. The cathode of the voltage-stabilizing diode (DZ1) is connected to the second output end (32o), and the anode is grounded.

6. A charging circuit for a movable lamp as claimed in claim 2, characterized in that: The battery management module (4) comprises an IP9315 chip and its peripheral circuits, and the first output terminal (31o) is connected to the V IN The lithium battery (5) is connected to the V pin of the IP9315 chip. BAT Pin.

7. A charging circuit for a movable lamp as claimed in claim 1, characterized in that: The charging interface (1) is a Type-C interface with an output voltage of 5V and an output current of 2A; the output voltage of the solar charging panel (2) is 6V and the power is 10W.

8. A garden lamp, characterized in that: It comprises a charging circuit for a movable lamp as claimed in any one of claims 1 to 7, wherein the solar charging panel (2) and the charging interface (1) are arranged on the outer surface of the garden lamp.

9. A garden lamp as claimed in claim 8, characterized in that: The invention comprises a light-emitting surface (600) and a toggle switch (601), wherein the toggle switch (601) is used to control the light-emitting mode of the light-emitting surface (600), the light-emitting surface comprises an LED module (6), the LED module (6) comprises a warm light LED lamp group and a cold light LED lamp group connected in parallel, and the LED module is electrically connected to the battery management module (4) and the lithium battery (5).

10. A garden lamp as claimed in claim 8, characterized in that: It also includes a USB type interface (700) which is connected to the V OUT Pin, used to power external devices.

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