Battery power supply circuit and lamp

Abstract

The utility model provides a battery power supply circuit and a lamp. The battery power supply circuit comprises a voltage detection module, a boosting module, a main control module, a first switch and a second switch, the battery supplies power to the load after passing through the boosting module; the input end of the voltage detection module is connected with the input end of the boost module, and the output end is connected with the input end of the master control module. The input end of the boosting module is connected with the power supply end of the main control module through a first switch, the output end of the boosting module is connected with the power supply end of the main control module through a second switch, and the first switch and the second switch are controlled by the main control module; the third output end of the main control module is connected with the control end of the load. Two power supply paths are arranged for the main control module, and the main control module continues to be powered after boosting when the battery voltage is low by controlling the on-off of the first switch and the second switch, so that the normal power supply of the main control module is ensured, and the utilization rate of the battery is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lamps, and in particular to a battery-powered circuit and a lamp. Background Art

[0002] In existing technology, many electronic devices are powered by batteries. The battery voltage is boosted to power back-end components, while the main control unit is powered directly by the battery voltage. As the battery discharges, the battery voltage gradually decreases. Because the main control IC and some peripheral circuits cannot function properly below a certain voltage, electronic devices will not function properly when the battery voltage falls below a certain limit. However, even though the battery voltage is low at this point, some of the power is still not fully utilized, resulting in energy waste. Utility Model Content

[0003] The embodiments of the present invention provide a battery-powered circuit and a lamp to solve the problem in the prior art that the battery power of electronic devices cannot be fully utilized.

[0004] In a first aspect, an embodiment of the present utility model provides a battery power supply circuit, comprising: a voltage detection module, a boost module, a main control module, a first switch, and a second switch;

[0005] The input end of the boost module forms the input terminal of the battery power supply circuit, and the output end of the boost module forms the output terminal of the battery power supply circuit; the input terminal is used to connect to the battery, and the output terminal is used to power the load;

[0006] The input end of the voltage detection module is connected to the input end of the boost module, and the output end of the voltage detection module is connected to the input end of the main control module, for detecting the voltage of the battery;

[0007] The input end of the boost module is connected to the first end of the first switch, the second end of the first switch is connected to the power supply end of the main control module, and the first output end of the main control module is connected to the control end of the first switch;

[0008] The output end of the boost module is connected to the first end of the second switch, the second end of the second switch is connected to the power supply end of the main control module, and the second output end of the main control module is connected to the control end of the second switch;

[0009] The third output terminal of the main control module is connected to the control terminal of the load.

[0010] Optionally, the battery power supply circuit further includes: a first diode and a second diode;

[0011] The second end of the first switch is connected to the anode of the first diode, and the cathode of the first diode is connected to the power supply end of the main control module;

[0012] The second end of the second switch is connected to the anode of the second diode, and the cathode of the second diode is connected to the power supply end of the main control module and the cathode of the first diode respectively.

[0013] Optionally, the voltage detection module includes: a voltage comparison unit;

[0014] The first input terminal of the voltage comparison unit is connected to the positive electrode of the battery, the second input terminal of the voltage comparison unit is used to input a reference voltage, and the output terminal of the voltage comparison unit forms the output terminal of the voltage detection module;

[0015] Among them, the negative pole of the battery is grounded.

[0016] Optionally, the voltage comparison unit includes: a first comparator, a first capacitor, a first resistor, a second resistor, a third resistor, and a fourth resistor;

[0017] a first input terminal of the first comparator being connected to the first terminal of the first resistor and the first terminal of the second resistor, respectively; a second input terminal of the first comparator being connected to the first terminal of the first capacitor and the first terminal of the third resistor, respectively; the second input terminal of the first comparator also forming the first input terminal of the voltage comparison unit; and an output terminal of the first comparator being connected to the first terminal of the fourth resistor;

[0018] The second end of the first resistor forms a second input end of the voltage comparison unit;

[0019] The second end of the fourth resistor forms the output end of the voltage comparison unit;

[0020] The second end of the second resistor, the second end of the third resistor, and the second end of the first capacitor are all grounded.

[0021] Optionally, the main control module includes: a main control unit and a voltage stabilizing unit;

[0022] The input end of the voltage stabilizing unit forms the power supply end of the main control module, and the output end of the voltage stabilizing unit is connected to the power supply end of the main control unit;

[0023] The input end of the main control unit forms the input end of the main control module, the first output end of the main control unit forms the first output end of the main control module, the second output end of the main control unit forms the second output end of the main control module, and the third output end of the main control unit forms the third output end of the main control module;

[0024] The output terminal of the voltage stabilizing unit is also connected to the second input terminal of the voltage comparing unit.

[0025] Optionally, the voltage detection module includes: a fifth resistor and a sixth resistor;

[0026] A first end of the fifth resistor is connected to the positive electrode of the battery, a second end of the fifth resistor is connected to the first end of the sixth resistor, and the second end of the fifth resistor also forms an output end of the voltage detection module;

[0027] The negative electrode of the battery and the second end of the sixth resistor are both grounded.

[0028] Optionally, the voltage detection module includes: a seventh resistor;

[0029] A first end of the seventh resistor is connected to the positive electrode of the battery, and a second end of the seventh resistor forms an output end of the voltage detection module;

[0030] The negative terminal of the battery is grounded.

[0031] Optionally, the boost circuit is a boost architecture.

[0032] Optionally, the first switch and the second switch are both MOS tubes, or the first switch and the second switch are both relays.

[0033] In a second aspect, an embodiment of the present invention provides a lamp, comprising a battery, an LED lamp, and the battery power supply circuit provided in the first aspect of the embodiment of the present invention;

[0034] The input terminal of the battery power supply circuit is connected to the battery, and the output terminal of the battery power supply circuit is connected to the LED lamp.

[0035] The present invention provides a battery-powered circuit and a lamp. The battery-powered circuit includes: a voltage detection module, a boost module, a main control module, a first switch, and a second switch; the input end of the boost module forms an input terminal of the battery-powered circuit, and the output end of the boost module forms an output terminal of the battery-powered circuit; the input terminal is used to connect to a battery, and the output terminal is used to supply power to a load; the input end of the voltage detection module is connected to the input end of the boost module, and the output end of the voltage detection module is connected to the input end of the main control module, for detecting the voltage of the battery; the input end of the boost module is connected to the first end of the first switch, the second end of the first switch is connected to the power supply end of the main control module, and the first output end of the main control module is connected to the control end of the first switch; the output end of the boost module is connected to the first end of the second switch, the second end of the second switch is connected to the power supply end of the main control module, and the second output end of the main control module is connected to the control end of the second switch; and the third output end of the main control module is connected to the control end of the load. In the embodiment of the present invention, two power supply paths are provided for the main control module: when the battery voltage is high, power is taken through the first switch without passing through the boost module, thereby reducing power loss; when the battery voltage is low, power is taken through the boost module and then boosted by the second switch. Therefore, when the battery voltage is low, the main control module can still be powered normally, thereby ensuring the normal operation of the main control module and improving the power utilization rate of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0037] Figure 1 This is a schematic diagram of the circuit structure of a battery power supply circuit provided by an embodiment of the present utility model;

[0038] Figure 2 This is a circuit structure diagram of another battery power supply circuit provided by an embodiment of the present utility model;

[0039] Figure 3 This is a circuit structure diagram of another battery power supply circuit provided by an embodiment of the present utility model;

[0040] Figure 4 This is a circuit diagram of a voltage comparison unit provided by an embodiment of the present utility model;

[0041] Figure 5 This is a circuit schematic diagram of a voltage detection module provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0042] To help those skilled in the art better understand this solution, the following will clearly describe the technical solutions in the embodiments of this solution in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of this solution, not all of it. Based on the embodiments of this solution, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of this solution.

[0043] Throughout the specification, claims, and accompanying figures of this solution, the term "including" and any variations thereof mean "including, but not limited to," and are intended to cover non-exclusive inclusions and are not limited to the examples listed herein. Furthermore, the terms "first" and "second," etc., are used to distinguish between different objects, not to describe a specific order.

[0044] The following is a detailed description of the implementation of the present invention with reference to the accompanying drawings:

[0045] Figure 1 This is a schematic diagram of the circuit structure of a battery power supply circuit provided by an embodiment of the present utility model. Figure 1 , the battery power supply circuit includes: a voltage detection module 11, a boost module 12, a main control module 13, a first switch K1 and a second switch K2;

[0046] The input end of the boost module 12 forms the input terminal of the battery power supply circuit, and the output end of the boost module 12 forms the output terminal of the battery power supply circuit; the input terminal is used to connect to the battery, and the output terminal is used to supply power to the load;

[0047] The input end of the voltage detection module 11 is connected to the input end of the boost module 12, and the output end of the voltage detection module 11 is connected to the input end of the main control module 13, for detecting the voltage of the battery;

[0048] The input end of the boost module 12 is connected to the first end of the first switch K1, the second end of the first switch K1 is connected to the power supply end of the main control module 13, and the first output end of the main control module 13 is connected to the control end of the first switch K1;

[0049] The output end of the boost module 12 is connected to the first end of the second switch K2, the second end of the second switch K2 is connected to the power supply end of the main control module 13, and the second output end of the main control module 13 is connected to the control end of the second switch K2;

[0050] The third output terminal of the main control module 13 is connected to the control terminal of the load.

[0051] In the embodiment of the present invention, two power supply paths are provided for the main control module 13. When the battery voltage is high, the first switch K1 can be closed and the second switch K2 can be opened. The main control module 13 is powered directly through the first switch K1 without passing through the boost module 12, which can effectively reduce the power loss caused by the boost module 13. As the battery voltage decreases, when the battery voltage is too low to directly power the main control module 13, the first switch K1 can be opened and the second switch K2 can be closed. The battery is boosted by the boost module 12 and then powers the main control module 13. This ensures that the main control module 13 can still be powered even when the battery voltage is low, effectively improving the battery's power utilization rate. The main control module 13 sends control instructions to the load through the third output terminal to control the load.

[0052] It should be noted that the main control module 13 has built-in control logic. The main control module 13 obtains the battery voltage through the voltage detection module 11. When the battery voltage is greater than the preset voltage, the first switch K1 is controlled to be turned on and the second switch K2 is controlled to be turned off. The battery directly powers the main control module 13. When the battery voltage is not greater than the preset voltage, the first switch K1 is controlled to be turned off and the second switch K2 is controlled to be turned on. The battery is boosted by the boost module 12 and then powers the main control module 13. This control logic is a conventional technical means and can also be set according to actual application requirements. It is not specifically limited. This application only protects the hardware circuit, and this control logic is not within the scope of protection of this application.

[0053] In one possible implementation, reference Figure 2, the battery power supply circuit may further include: a first diode D1 and a second diode D2;

[0054] The second end of the first switch K1 is connected to the anode of the first diode D1, and the cathode of the first diode D1 is connected to the power supply end of the main control module 13;

[0055] The second end of the second switch K2 is connected to the anode of the second diode D2 , and the cathode of the second diode D2 is connected to the power supply end of the main control module 13 and the cathode of the first diode D1 .

[0056] Because the switches (first switch K1 and second switch K2) operate with a time delay, their operation cannot be completely synchronized when controlling their operation. This could result in the first switch K1 and second switch K2 closing simultaneously, causing a short circuit between the input and output terminals of the boost module 12, impacting normal operation of the boost module 12 and even damaging the battery. Therefore, to avoid the adverse effects of the simultaneous closing of the first switch K1 and second switch K2, first diode D1 and second diode D2 are provided. By utilizing the reverse-blocking characteristics of the diodes, this prevents a short circuit between the input and output terminals of the boost module 12, thereby preventing adverse effects on the circuit.

[0057] In one possible implementation, reference Figure 3 , the voltage detection module 11 may include: a voltage comparison unit 111;

[0058] The first input terminal of the voltage comparison unit 111 is connected to the positive electrode of the battery, the second input terminal of the voltage comparison unit 111 is used to input the reference voltage Vref, and the output terminal of the voltage comparison unit 111 forms the output terminal of the voltage detection module 11;

[0059] Among them, the negative pole of the battery is grounded.

[0060] In the embodiment of the present invention, the voltage detection module 11 may use a voltage comparison unit 111 to compare the battery voltage with a reference voltage Vref, thereby controlling the switching of the first switch K1 and the second switch K2. The reference voltage Vref may be set according to the above-mentioned preset voltage.

[0061] In one possible implementation, reference Figure 4 The voltage comparison unit 111 may include: a first comparator U1, a first capacitor C1, a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4;

[0062] A first input terminal of the first comparator U1 is connected to the first end of the first resistor R1 and the first end of the second resistor R2, respectively. A second input terminal of the first comparator U1 is connected to the first end of the first capacitor C1 and the first end of the third resistor R3, respectively. The second input terminal of the first comparator U1 also forms the first input terminal of the voltage comparison unit 111. An output terminal of the first comparator U1 is connected to the first end of the fourth resistor R4.

[0063] The second end of the first resistor R1 forms a second input end of the voltage comparison unit 111;

[0064] The second end of the fourth resistor R4 forms the output end of the voltage comparison unit 111;

[0065] The second end of the second resistor R2 , the second end of the third resistor R3 , and the second end of the first capacitor C1 are all grounded.

[0066] In the embodiment of the present utility model, a comparator can be used to implement voltage comparison. Figure 4 The first resistor R1 and the second resistor R2 are used to divide the reference voltage Vref to match the battery voltage. The first capacitor C1 and the third resistor R3 are used for filtering to prevent external noise from affecting battery voltage detection. The fourth resistor R4 is used for buffering. The first comparator U1 outputs a high or low voltage level. The main control module 13 determines the battery voltage level based on the level output by the voltage comparison unit 111, thereby controlling the switching of the power supply path.

[0067] In one possible implementation, reference Figure 3 , the main control module 13 includes: a main control unit 131 and a voltage stabilizing unit 132;

[0068] The input end of the voltage stabilizing unit 132 forms the power supply end of the main control module 13, and the output end of the voltage stabilizing unit 132 is connected to the power supply end of the main control unit 131;

[0069] The input end of the main control unit 131 forms the input end of the main control module 13, the first output end of the main control unit 131 forms the first output end of the main control module 13, the second output end of the main control unit 131 forms the second output end of the main control module 13, and the third output end of the main control unit 131 forms the third output end of the main control module 13;

[0070] The output terminal of the voltage stabilizing unit 132 is also connected to the second input terminal of the voltage comparing unit 111 .

[0071] Because the two power supply paths have different supply voltages, a voltage stabilizing unit 132 is provided in the main control module 13 to stabilize the voltage and provide a stable supply voltage to the main control unit 131. Furthermore, the output of the voltage stabilizing unit 132 can be used as a reference voltage, eliminating the need for an additional DC power supply and reducing circuit complexity and cost.

[0072] Specifically, the main control unit 131 can be a main control chip and peripheral circuits, which are conventional technical means and will not be described in detail here.

[0073] Since some main control chips have built-in comparators, there is no need to provide an additional comparator (the first comparator U1 ).

[0074] Based on this, in a possible implementation, refer to Figure 5 , the voltage detection module 11 includes: a fifth resistor R5 and a sixth resistor R6;

[0075] A first end of the fifth resistor R5 is connected to the positive electrode of the battery, a second end of the fifth resistor R5 is connected to the first end of the sixth resistor R6, and the second end of the fifth resistor R5 also forms the output end of the voltage detection module 11;

[0076] The negative electrode of the battery and the second end of the sixth resistor R6 are both grounded.

[0077] When the main control IC has a built-in comparator, the battery voltage is directly input into the main control IC after being divided by the fifth resistor R5 and the sixth resistor R6, without the need for an additional comparator, thereby reducing circuit cost.

[0078] For another example, some main control IC ports have threshold voltage settings, so the battery voltage can be directly connected to the main control IC port without voltage division.

[0079] Based on the above, in a possible implementation, the voltage detection module 11 may include: a seventh resistor;

[0080] A first end of the seventh resistor is connected to the positive electrode of the battery, and a second end of the seventh resistor forms an output end of the voltage detection module 11;

[0081] The negative terminal of the battery is grounded.

[0082] The battery voltage is directly connected to the main control IC through the seventh resistor, which reduces circuit complexity and cost without affecting the normal detection of the battery voltage.

[0083] In a possible implementation, the boost circuit may be a boost architecture.

[0084] The architecture of the boost circuit is not specifically limited, as long as it can achieve the boost function.

[0085] In a possible implementation, the first switch K1 and the second switch K2 may both be MOS transistors, or the first switch K1 and the second switch K2 may both be relays.

[0086] Both the first switch K1 and the second switch K2 are controllable switches. When the circuit power is low, MOS transistors can be used, as they are simple to control and have low component cost. Since ordinary MOS transistors cannot withstand high power, relays can be used when the circuit power is high. The specific setting can be determined based on actual application requirements.

[0087] Corresponding to the above embodiment, an embodiment of the present utility model further provides a lamp, comprising a battery, an LED lamp and the battery power supply circuit provided in any aspect of the above embodiment;

[0088] The input terminal of the battery power supply circuit is connected to the battery, and the output terminal of the battery power supply circuit is connected to the LED lamp.

[0089] The battery powers the LED light through the boost module 12. When the battery voltage is high, the first switch K1 is closed and the second switch K2 is open. The battery directly powers the main control module 13, which operates normally and controls the LED light. When the battery voltage is low, the first switch K1 is open and the second switch K2 is closed. The battery voltage is boosted by the boost module 12 and then powers the main control module 13. This allows the main control module 13 to operate normally and control the LED light even when the battery voltage is very low, effectively improving the utilization of battery energy.

[0090] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A battery powered circuit, characterized in that: include: Voltage detection module, boost module, main control module, first switch and second switch; The input end of the boost module forms the input terminal of the battery power supply circuit, and the output end of the boost module forms the output terminal of the battery power supply circuit; the input terminal is used to connect to the battery, and the output terminal is used to supply power to the load; The input end of the voltage detection module is connected to the input end of the boost module, and the output end of the voltage detection module is connected to the input end of the main control module, for detecting the voltage of the battery; The input end of the boost module is connected to the first end of the first switch, the second end of the first switch is connected to the power supply end of the main control module, and the first output end of the main control module is connected to the control end of the first switch; The output end of the boost module is connected to the first end of the second switch, the second end of the second switch is connected to the power supply end of the main control module, and the second output end of the main control module is connected to the control end of the second switch; The third output terminal of the main control module is connected to the control terminal of the load.

2. The battery powered circuit according to claim 1, wherein: The battery power supply circuit further includes: a first diode and a second diode; The second end of the first switch is connected to the anode of the first diode, and the cathode of the first diode is connected to the power supply end of the main control module; The second end of the second switch is connected to the anode of the second diode, and the cathode of the second diode is connected to the power supply end of the main control module and the cathode of the first diode respectively.

3. The battery powered circuit according to claim 1 or 2, wherein: The voltage detection module includes: a voltage comparison unit; The first input terminal of the voltage comparison unit is connected to the positive electrode of the battery, the second input terminal of the voltage comparison unit is used to input a reference voltage, and the output terminal of the voltage comparison unit forms the output terminal of the voltage detection module; Wherein, the negative pole of the battery is grounded.

4. The battery powered circuit according to claim 3, wherein: The voltage comparison unit includes: a first comparator, a first capacitor, a first resistor, a second resistor, a third resistor and a fourth resistor; a first input terminal of the first comparator being connected to the first terminal of the first resistor and the first terminal of the second resistor, respectively; a second input terminal of the first comparator being connected to the first terminal of the first capacitor and the first terminal of the third resistor, respectively; the second input terminal of the first comparator also forming the first input terminal of the voltage comparison unit; and an output terminal of the first comparator being connected to the first terminal of the fourth resistor; The second end of the first resistor forms the second input end of the voltage comparison unit; The second end of the fourth resistor forms the output end of the voltage comparison unit; The second end of the second resistor, the second end of the third resistor, and the second end of the first capacitor are all grounded.

5. The battery powered circuit according to claim 3, wherein: The main control module includes: a main control unit and a voltage stabilizing unit; The input end of the voltage stabilizing unit forms the power supply end of the main control module, and the output end of the voltage stabilizing unit is connected to the power supply end of the main control unit; The input end of the main control unit forms the input end of the main control module, the first output end of the main control unit forms the first output end of the main control module, the second output end of the main control unit forms the second output end of the main control module, and the third output end of the main control unit forms the third output end of the main control module; The output end of the voltage stabilizing unit is also connected to the second input end of the voltage comparing unit.

6. The battery powered circuit according to claim 1 or 2, characterized in that: The voltage detection module includes: a fifth resistor and a sixth resistor; A first end of the fifth resistor is connected to the positive electrode of the battery, a second end of the fifth resistor is connected to the first end of the sixth resistor, and the second end of the fifth resistor also forms an output end of the voltage detection module; The negative electrode of the battery and the second end of the sixth resistor are both grounded.

7. The battery powered circuit according to claim 1 or 2, characterized in that: The voltage detection module includes: a seventh resistor; A first end of the seventh resistor is connected to the positive electrode of the battery, and a second end of the seventh resistor forms an output end of the voltage detection module; The negative terminal of the battery is grounded.

8. The battery powered circuit according to claim 1 or 2, wherein: The boost module is a boost architecture.

9. The battery powered circuit according to claim 1 or 2, characterized in that: The first switch and the second switch are both MOS tubes, or the first switch and the second switch are both relays.

10. A lamp, characterized in that: comprising a battery, an LED lamp and a battery-powered circuit according to any one of claims 1 to 9; An input terminal of the battery power supply circuit is connected to the battery, and an output terminal of the battery power supply circuit is connected to the LED lamp.

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