Circuit shared by double battery packs and floodlight

Abstract

The utility model provides a dual battery pack shared circuit, which is applied to a floodlight, the floodlight comprises an LED module, the shared circuit comprises a battery pack, a first detection circuit, a control circuit and a first indicator light circuit, the battery pack is electrically connected with the LED module, and the voltage of the battery pack is 18V or 22V; the first detection circuit is electrically connected with the battery pack; the control circuit comprises a control unit, the control unit is electrically connected with the first detection circuit, and the control unit is used for receiving the level signal output by the first detection circuit and judging the voltage of the battery pack according to the level signal; the first indicator light circuit is electrically connected with the control unit and is used for indicating the electric quantity of the battery pack; wherein when the control unit judges that the level signal is a high level, the control unit is used for controlling the first indicating lamp circuit to indicate the electric quantity of the battery pack with the voltage of 22V; and when the control unit judges that the level signal is at a low level, the control unit is used for controlling the first indicator light circuit to indicate the electric quantity of the battery pack with the voltage of 18V.

Description

Technical Field

[0001] The utility model embodiment relates to the field of mobile lighting technology, and in particular to a dual-battery pack shared circuit and a floodlight. Background Art

[0002] A floodlight is a point light source that can evenly illuminate in all directions. Its illumination range can be adjusted arbitrarily. It is represented by a regular octahedron icon in the scene. Floodlights can be used for architectural lighting as well as landscape lighting. With the development of lithium battery technology, 18V, 22V and other tool lithium battery packs are also widely used in floodlights.

[0003] In the related art, the circuit of a general floodlight can only be matched with an 18V or 22V battery pack alone. However, since the voltages of the two battery packs overlap at 18-21V (the voltage of an 18V battery pack after being fully charged is 15-21V, and the voltage of a 22V battery pack after being fully charged is 18-25V), the battery gauge will display inaccurately, resulting in the two battery packs not being able to be used together in the floodlight, reducing the applicability of the floodlight.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the utility model, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0005] The purpose of the utility model is to provide a dual battery pack shared circuit and a floodlight, which at least to a certain extent overcomes the problem that 18V or 22V battery packs in the related art cannot be shared on the floodlight.

[0006] Other features and advantages of the present invention will become apparent from the following detailed description, or may be learned in part by the practice of the present disclosure.

[0007] According to one aspect of the utility model, a dual battery pack common circuit is provided, which is applied to a floodlight. The floodlight includes an LED module, and the common circuit includes a battery pack, a first detection circuit, a control circuit and a first indicator light circuit. The battery pack is electrically connected to the LED module, and the voltage of the battery pack is 18V or 22V; the first detection circuit is electrically connected to the battery pack; the control circuit includes a control unit, the control unit is electrically connected to the first detection circuit, the control unit is used to receive a level signal output by the first detection circuit, and determine the voltage of the battery pack according to the level signal; the first indicator light circuit is electrically connected to the control unit, and the first indicator light circuit is used to display the power of the battery pack; wherein, when the control unit determines that the level signal is a high level, the control unit is used to control the first indicator light circuit to display the power of the battery pack with a voltage of 22V; when the control unit determines that the level signal is a low level, the control unit is used to control the first indicator light circuit to display the power of the battery pack with a voltage of 18V.

[0008] According to one embodiment of the utility model, the first detection circuit includes a resistor R32, a resistor R33 and a resistor R34 connected in series in sequence, and a detection end of the control unit is connected between the resistor R33 and the resistor R34. When the voltage of the battery pack is 18V, the output end of the battery pack is electrically connected to the input end of the resistor R32; when the voltage of the battery pack is 22V, the output end of the battery pack is electrically connected to the input end of the resistor R33.

[0009] According to one embodiment of the utility model, the common circuit also includes a switching circuit, the input end and the output end of the switching circuit are electrically connected to the battery pack and the LED module respectively, the switching circuit is electrically connected to the control unit, and the control unit can control the conduction and cutoff of the switching circuit.

[0010] According to an embodiment of the utility model, the common circuit further includes a driving circuit, and an input end and an output end of the driving circuit are electrically connected to the switch circuit and the LED module respectively.

[0011] According to one embodiment of the utility model, the driving circuit includes a boost constant current chip and a MOS tube Q3, the input end and the output end of the boost constant current chip are electrically connected to the control unit and the MOS tube Q3 respectively, and the control unit controls the conduction degree of the MOS tube Q3 by outputting PWM signals with different duty cycles to control the brightness of the LED module.

[0012] According to an embodiment of the utility model, the common circuit further includes a second indicator light circuit, the second indicator light circuit is electrically connected to the control unit, and the second indicator light circuit is used to display the brightness of the LED module.

[0013] According to one embodiment of the utility model, the common circuit also includes a second detection circuit, which includes a resistor R8 and a resistor R7 connected in series in sequence, an input end of the resistor R8 is electrically connected to an output end of the switching circuit, a detection end of the control unit is connected between the resistor R8 and the resistor R7, and the second detection circuit is used to detect the power level of the battery pack.

[0014] According to one embodiment of the utility model, the common circuit also includes a step-down circuit, an input end and an output end of the step-down circuit are electrically connected to the battery pack and the control unit respectively, and the step-down circuit is used to supply power to the control unit.

[0015] According to an embodiment of the utility model, the control circuit further includes a button group unit, the button group unit is electrically connected to the control unit, and the button group unit is used to control the lighting, closing and brightness of the LED module.

[0016] According to another aspect of the utility model, a floodlight is provided, comprising the dual battery pack common circuit as described in any one of the above, and at least one LED module, wherein the common circuit is electrically connected to at least one of the LED modules.

[0017] It can be seen from the above technical solution that the advantages and positive effects of the dual battery pack shared circuit and floodlight of the utility model are:

[0018] The dual battery pack shared circuit and floodlight provided by the utility model are electrically connected to the first detection circuit through a battery pack with a voltage of 18V or 22V, and the control unit is electrically connected to the first detection circuit and the first indicator light circuit respectively. The control unit can determine the voltage of the battery pack according to the level signal output by the first detection circuit, and control the first indicator light circuit to display the current power of the battery pack. In this way, the control unit can determine whether the input voltage is 18V or 22V, thereby more accurately displaying the power of the battery pack currently in use, so that two battery packs can be used on the same floodlight, thereby enhancing the applicability of the floodlight and avoiding the situation where the battery pack applicable to the floodlight is relatively single.

[0019] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and other features and advantages of the present invention will become more apparent by describing in detail example embodiments thereof with reference to the attached drawings.

[0021] Figure 1 An electrical connection diagram of a dual battery pack shared circuit in an embodiment of the present disclosure is shown.

[0022] Figure 2 A circuit diagram of a first detection circuit, a switch circuit, a first control unit, a first indicator light circuit and a second indicator light unit of a dual battery pack common circuit in an embodiment of the present disclosure is shown.

[0023] Figure 3 A circuit diagram of a driving circuit of a dual battery pack common circuit in an embodiment of the present disclosure is shown.

[0024] Figure 4 A circuit schematic diagram of a second detection circuit, a voltage reduction circuit and a button group unit of a dual battery pack common circuit in an embodiment of the present disclosure is shown.

[0025] The reference numerals are described as follows:

[0026] 100, battery pack; 200, first detection circuit; 210, second detection circuit; 300, control circuit; 310, control unit; 320, button group unit; 400, first indicator light circuit; 410, second indicator light circuit; 500, LED module; 600, switch circuit; 700, drive circuit; 800, buck circuit. DETAILED DESCRIPTION

[0027] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0028] refer to Figure 1 and Figure 2This embodiment provides a dual battery pack common circuit, which is applied to a floodlight. The floodlight includes an LED module 500, and the dual battery pack common circuit is electrically connected to the LED module 500. The dual battery pack common circuit may include a battery pack 100, a first detection circuit 200, a control circuit 300, and a first indicator light circuit 400. The first detection circuit 200 is electrically connected to the battery pack 100 and the control circuit 300, respectively. The control circuit 300 is electrically connected to the first indicator light circuit 400. The control circuit 300 can determine the current voltage of the battery pack 100 according to the level signal output by the first detection circuit 200, and control the first indicator light circuit 400 to display the current power of the battery pack 100, so that the power display is more accurate.

[0029] The battery pack 100 may include a battery pack BAT2 with a voltage of 18V and a battery pack BAT1 with a voltage of 22V. Both battery packs 100 with different voltages can be used in a dual battery pack shared circuit. The control circuit 300 may include a control unit 310. The control unit 310 may be a single-chip microcomputer IC1. The model of the single-chip microcomputer IC1 is SC8F6790. Although the model of the single-chip microcomputer IC1 in the present disclosure is SC8F6790, the present disclosure is not limited thereto.

[0030] The first detection circuit 200 is electrically connected to the battery pack 100. The first measurement circuit may include a resistor R32, a resistor R33 and a resistor R34. The resistors R32, R33 and R34 are connected in series in sequence. The twentieth pin of the microcontroller IC1 is connected between the resistor R33 and the resistor R34.

[0031] The positive electrode of the battery pack BAT2 is electrically connected to the input end of the resistor R32, the output end of the resistor R32 is electrically connected to the input end of the resistor R33, the output end of the resistor R33 is electrically connected to the input end of the resistor R34, and the output end of the resistor R34 is grounded. Therefore, the single-chip microcomputer IC1 can receive a low-level signal and determine that the battery pack 100 currently connected and used is the 18V battery pack BAT2.

[0032] The battery pack BAT1 includes a positive electrode, a communication contact and a negative electrode. The positive electrode of the battery pack BAT1 is electrically connected to the input end of the resistor R32, the output end of the resistor R32 is electrically connected to the input end of the resistor R33, the output end of the resistor R33 is electrically connected to the input end of the resistor R34, and the power-on contact of the battery pack BAT1 is electrically connected to the input end of the resistor R33, and the output end of the resistor R34 is grounded. The single-chip microcomputer IC1 can receive a high-level signal and determine that the battery pack 100 currently connected and used is a 22V battery pack BAT1.

[0033] After the single-chip microcomputer IC1 determines that the battery pack 100 is 18V or 22V, the battery pack 100 power data obtained through the internal algorithm conversion of the single-chip microcomputer IC1 is relatively accurate, so that the single-chip microcomputer IC1 can more accurately control the first indicator light circuit 400 to display the power of the battery pack 100. It should be noted that the single-chip microcomputer IC1 and its internal algorithm belong to the prior art and will not be described in detail here.

[0034] The control unit 310 is electrically connected to the first indicator light circuit 400, and the first indicator light circuit 400 may include indicator lights LD5, LD6, LD7 and LD8. A resistor RD05 is connected between the indicator light LD5 and the fourth pin of the microcontroller IC1, a resistor RD06 is connected between the indicator light LD6 and the third pin of the microcontroller IC1, a resistor RD07 is connected between the indicator light LD7 and the second pin of the microcontroller IC1, and a resistor RD08 is connected between the indicator light LD8 and the first pin of the microcontroller IC1.

[0035] When only the indicator light LD5 in the first indicator light circuit 400 is on, it can indicate that the battery pack 100 has a power level between 0% and 25%; when only the indicator light LD5 and the indicator light LD6 in the first indicator light circuit 400 are on, it can indicate that the battery pack 100 has a power level between 25% and 50%; when only the indicator light LD5, the indicator light LD6 and the indicator light LD7 in the first indicator light circuit 400 are on, it can indicate that the battery pack 100 has a power level between 50% and 75%; when all four indicator lights in the first indicator light circuit 400 are on, it can indicate that the battery pack 100 has a power level between 75% and 100%. It should be noted that the present disclosure is not limited to the first indicator light circuit 400 including four indicator lights, and the first indicator light circuit 400 may include two indicator lights, three indicator lights, five indicator lights, etc. For example, the first indicator light circuit 400 may include two indicator lights, and only one indicator light indicates that the battery pack 100 has a power level between 0% and 50%, and both indicator lights indicate that the battery pack 100 has a power level between 50% and 100%.

[0036] In this embodiment, the battery pack 100 with a voltage of 18V or 22V is electrically connected to the first detection circuit 200, and the control unit 310 is electrically connected to the first detection circuit 200 and the first indicator circuit 400 respectively, and the control unit 310 can determine the voltage of the battery pack 100 according to the level signal output by the first detection circuit 200, and control the first indicator circuit to display the current power of the battery pack 100. In this way, the control unit 310 can determine whether the input voltage is 18V or 22V, thereby more accurately displaying the power of the currently used battery pack 100, so that two types of battery packs 100 can be used on the same floodlight, thereby enhancing the applicability of the floodlight and avoiding the problem that the battery pack 100 applicable to the floodlight is relatively single.

[0037] refer to Figures 2 to 4 The dual battery pack common circuit may further include a switch circuit 600 , a drive circuit 700 , a second indicator light circuit 410 , a second detection circuit 210 and a buck circuit 800 .

[0038] In one example, the input end and the output end of the switch circuit 600 are electrically connected to the battery pack 100 and the LED module 500 respectively, and the switch circuit 600 is electrically connected to the control unit 310 , and the control unit 310 can control the conduction and cutoff of the switch circuit 600 .

[0039] Among them, the switching circuit 600 may include a gate of the MOS tube Q2 electrically connected to the fourteenth pin of the microcontroller IC1, a source of the MOS tube Q2 grounded, a drain of the MOS tube Q2 electrically connected to the gate of the MOS tube Q1, a source of the MOS tube Q1 electrically connected to the positive electrode of the battery pack 100, a drain of the MOS tube Q1 electrically connected to the input end of the driving circuit 700, and an output end of the driving circuit 700 electrically connected to the input end of the LED module 500.

[0040] When the fourteenth pin of the single chip microcomputer IC1 outputs a high level, the MOS tube Q2 is turned on, and then the MOS tube Q1 is also turned on, and the battery pack 100 can supply power to the LED module 500, and the LED module 500 emits light.

[0041] When the fourteenth pin of the single chip microcomputer IC1 outputs a low level, the MOS tube Q2 is turned off, and then the MOS tube Q1 is also turned off, the battery pack 100 cannot supply power to the LED module 500, and the LED module 500 does not emit light.

[0042] In one example, the input and output of the driving circuit 700 are electrically connected to the switch circuit 600 and the LED module 500 respectively. When the switch circuit 600 is turned on, the energy of the battery pack 100 can be boosted by the driving circuit 700 to output a voltage of 36V to light up the LED module 500.

[0043] The driving circuit 700 may include a boost constant current chip U20 and a MOS tube Q3, wherein the model of the constant current driving chip U20 may be OC6781. The EN pin of the boost constant current chip U20 is electrically connected to the 13th pin of the single-chip microcomputer IC1, the DRV pin of the boost constant current chip U20 is electrically connected to the gate of the MOS tube Q3, the drain of the MOS tube Q3 is electrically connected to the input end of the LED module 500, and the source of the MOS tube Q3 is grounded. The 13th pin of the single-chip microcomputer IC1 can output PWM signals with different duty cycles to control the conduction degree of the MOS tube Q3, so as to control the brightness of the LED module 500.

[0044] The driving circuit 700 may also include an inductor L1, a diode D05 and a capacitor CD2. The output end of the switching circuit 600 is electrically connected to the inductor L1. The output end of the inductor L1 is electrically connected to the drain of the MOS tube Q3. The output end of the inductor L1 is also electrically connected to the positive electrode of the diode D05. The negative electrode of the diode D05 is electrically connected to the input end of the LED module 500.

[0045] When the chip U20 is powered on, the MOS tube Q3 is turned on first, so that the current flows out from the positive electrode of the battery pack 100 and passes through the MOS tube Q1, the inductor L1, the MOS tube Q3, and the ground GND in sequence. Then the MOS tube Q3 is turned off, so that the current flows out from the positive electrode of the battery pack 100 and passes through the MOS tube Q1, the inductor L1, the diode D05, the capacitor CD2 and the ground GND in sequence. In this way, the capacitor CD2 can be charged and a high-frequency switch is played to increase the voltage by 36V to light up the LED module 500.

[0046] In one example, the second indicator light circuit 410 is electrically connected to the control unit 310 , and the second indicator light circuit 410 is used to indicate the brightness of the LED module 500 .

[0047] Among them, the second indicator light circuit 410 may include indicator lights LD1, indicator lights LD2, indicator lights LD3 and indicator lights LD4, a resistor RD01 is connected between the indicator light LD1 and the twelfth pin of the microcontroller IC1, a resistor RD02 is connected between the indicator light LD2 and the fifth pin of the microcontroller IC1, a resistor RD03 is connected between the indicator light LD3 and the sixth pin of the microcontroller IC1, and a resistor RD04 is connected between the indicator light LD4 and the eighth pin of the microcontroller IC1.

[0048] When only indicator light LD1 in the second indicator light circuit 410 is on, it can indicate that the brightness of the LED module 500 is 25%; when only indicator light LD1 and indicator light LD2 in the second indicator light circuit 410 are on, it can indicate that the brightness of the LED module 500 is 50%; when only indicator light LD1, indicator light LD2 and indicator light LD3 in the second indicator light circuit 410 are on, it can indicate that the brightness of the LED module 500 is 75%; when all four indicator lights in the second indicator light circuit 410 are on, it can indicate that the brightness of the LED module 500 is 100%.

[0049] In one example, the second detection circuit 210 may include a resistor R8, a resistor R7 and a capacitor C7, the input end of the resistor R8 is electrically connected to the drain of the MOS tube Q1, the thirteenth pin of the microcontroller IC1 is connected between the resistor R8 and the resistor R7, and the second detection circuit 210 is used to detect the power of the battery pack 100. The capacitor C7 is connected in parallel with the resistor R7, and the capacitor C7 has a filtering effect.

[0050] In one example, the input end and the output end of the buck circuit 800 are electrically connected to the battery pack 100 and the control unit 310 respectively, and the buck circuit 800 is used to supply power to the control unit 310 .

[0051] Among them, the buck circuit 800 may include a buck and voltage regulator chip IC2, the model of the buck and voltage regulator chip IC2 may be ME6203A50PG, the VIN pin of the buck and voltage regulator chip IC2 is electrically connected to the positive pole of the battery pack 100, and the buck and voltage regulator chip IC2 is connected in front of the input end of the switching unit, and the Vout pin of the buck and voltage regulator chip IC2 is electrically connected to the ninth pin of the microcontroller IC1, so that a 5V voltage can be provided to the microcontroller IC1.

[0052] refer to Figures 2 to 4 The control circuit 300 may further include a button group unit 320 , which is electrically connected to the control unit 310 , and is used to control the start, stop and brightness of the LED module 500 .

[0053] Among them, the key group unit 320 may include key SW1, key SW2 and key SW3, key SW1 is electrically connected to the seventeenth pin of the microcontroller IC1, key SW2 is electrically connected to the fifteenth pin of the microcontroller IC1, key SW3 is electrically connected to the sixteenth pin of the microcontroller IC1, and key SW1, key SW2 and key SW3 can all send high and low level signals to the microcontroller IC1.

[0054] The button SW1 can control the 14th pin of the single-chip microcomputer IC1 to output high and low levels to control the conduction and cutoff of the MOS tube Q1, thereby realizing the ON / OFF of the LED module 500. The buttons SW2 and SW3 can control the 13th pin of the single-chip microcomputer IC1 to output a PWM signal of a duty cycle. For example, pressing the button SW2 once increases the output duty cycle of the 13th pin of the single-chip microcomputer IC1 by 10%, and pressing the button SW2 once decreases the output duty cycle of the 13th pin of the single-chip microcomputer IC1 by 10%, thereby realizing the DIM+ and DIM- of the LED module 500.

[0055] refer to Figure 1 This embodiment provides a floodlight, which includes the above-mentioned dual battery pack common circuit and at least one LED module 500. The dual battery pack common circuit is electrically connected to the at least one LED module 500, so that the floodlight can match the 18V battery pack 100 and the 22V battery pack 100, thereby expanding the practicality of the floodlight.

[0056] In the embodiments of the utility model, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the utility model can be understood according to the specific circumstances.

[0057] In the description of the utility model embodiments, it needs to be understood that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front", and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model embodiments and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the utility model embodiments.

[0058] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0059] The above are only preferred embodiments of the utility model embodiments, and are not intended to limit the utility model embodiments. For those skilled in the art, the utility model embodiments may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model embodiments shall be included in the protection scope of the utility model embodiments.

Claims

1. A dual battery pack shared circuit is applied to a floodlight, the floodlight includes an LED module, It is characterized in that The shared circuit comprises: A battery pack, the battery pack is electrically connected to the LED module, and the voltage of the battery pack is 18V or 22V; a first detection circuit, the first detection circuit being electrically connected to the battery pack; A control circuit, the control circuit comprising a control unit, the control unit being electrically connected to the first detection circuit, the control unit being configured to receive a level signal output by the first detection circuit, and determining the voltage of the battery pack according to the level signal; A first indicator light circuit, the first indicator light circuit is electrically connected to the control unit, and the first indicator light circuit is used to display the power of the battery pack; Wherein, when the control unit determines that the level signal is at a high level, the control unit is used to control the first indicator light circuit to display the power of the battery pack with a voltage of 22V; When the control unit determines that the level signal is at a low level, the control unit is used to control the first indicator light circuit to display the power level of the battery pack at a voltage of 18V.

2. The dual battery pack shared circuit according to claim 1, It is characterized in that The first detection circuit includes a resistor R32, a resistor R33 and a resistor R34 connected in series in sequence, and a detection end of the control unit is connected between the resistor R33 and the resistor R34. When the voltage of the battery pack is 18V, the output end of the battery pack is electrically connected to the input end of the resistor R32; when the voltage of the battery pack is 22V, the output end of the battery pack is electrically connected to the input end of the resistor R33.

3. The dual battery pack shared circuit according to claim 1, It is characterized in that The common circuit also includes a switch circuit, the input end and the output end of the switch circuit are electrically connected to the battery pack and the LED module respectively, and the switch circuit is electrically connected to the control unit, and the control unit can control the conduction and cutoff of the switch circuit.

4. The dual battery pack shared circuit according to claim 3, It is characterized in that The common circuit also includes a driving circuit, and an input end and an output end of the driving circuit are electrically connected to the switch circuit and the LED module respectively.

5. The dual battery pack shared circuit according to claim 4, It is characterized in that The driving circuit includes a boost constant current chip and a MOS tube Q3. The input end and the output end of the boost constant current chip are electrically connected to the control unit and the MOS tube Q3 respectively. The control unit controls the conduction degree of the MOS tube Q3 by outputting PWM signals with different duty cycles to control the brightness of the LED module.

6. The dual battery pack common circuit according to claim 5, It is characterized in that The common circuit also includes a second indicator light circuit, which is electrically connected to the control unit and is used to display the brightness of the LED module.

7. The dual battery pack shared circuit according to claim 3, It is characterized in that The common circuit also includes a second detection circuit, which includes a resistor R8 and a resistor R7 connected in series in sequence, an input end of the resistor R8 is electrically connected to an output end of the switching circuit, a detection end of the control unit is connected between the resistor R8 and the resistor R7, and the second detection circuit is used to detect the power of the battery pack.

8. The dual battery pack shared circuit according to claim 1, It is characterized in that The common circuit also includes a step-down circuit, an input end and an output end of the step-down circuit are electrically connected to the battery pack and the control unit respectively, and the step-down circuit is used to supply power to the control unit.

9. The dual battery pack shared circuit according to claim 1, It is characterized in that The control circuit also includes a button group unit, which is electrically connected to the control unit and is used to control the lighting, shutting down and brightness of the LED module.

10. A floodlight, It is characterized in that The floodlight comprises the dual battery pack common circuit as claimed in any one of claims 1 to 9, and at least one LED module, wherein the common circuit is electrically connected to at least one of the LED modules.

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