Battery-based power supply and low-power-consumption power supply method thereof

Abstract

The invention relates to a battery-based low-power-consumption power supply method for a power supply. The method comprises the following steps: S10, judging whether an MCU (Microprogrammed Control Unit) obtains a low-power-consumption mode trigger signal or not; if yes, skipping to the step S20; and if not, the DC-DC is maintained in an on state, the output voltage of the DC-DC to the power supply pin of the MCU is V1, the output voltage of the battery to the power supply pin of the MCU through the resistance voltage division circuit is V2, V2 is larger than 0 and smaller than V1, and the input voltage of the power supply pin of the MCU is V1. And S20, the MCU sends a turn-off signal to the DC-DC to control the turn-off of the DC-DC, the output voltage of the DC-DC to the power supply pin of the MCU is 0, the output voltage of the battery to the power supply pin of the MCU through the resistance voltage division circuit is V2, and the input voltage of the power supply pin of the MCU is V2. The invention also provides a battery-based power supply. When the low-power-consumption mode is switched, the DC-DC is switched off, and the voltage input source of the MCU is switched from the DC-DC to the resistance voltage division circuit of the battery, so that normal operation of the MCU can still be maintained under the condition that the DC-DC is switched off, and the energy consumption of a product in a standby state is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply design, and in particular to a battery-based power supply and a battery-based low-power supply method. Background Art

[0002] For products that require battery power (such as handheld milk warmers), the power supply is generally a combination of batteries and DC-DC (direct current-to-direct current converter, generally referred to as DC-DC in the industry). The voltage output from the output end of the power supply is regulated by the DC-DC and then transmitted to the MCU and various functional modules in the product. Based on the need for energy saving, most products currently have a low power consumption mode, that is, when the product does not need to perform a task (waiting for the next task instruction), it turns off various functional modules to reduce the energy consumption of the product when it is in standby mode.

[0003] When a traditional battery-based power supply enters low-power mode, the method used is to shut down the DC-DC and other functional modules except the MCU. The disadvantage of this traditional design is that because the MCU needs to maintain normal working status so that each functional module can be awakened at any time, the DC-DC needs to maintain working status to power the MCU. However, the energy consumption of the DC-DC is high when it maintains working status, making it difficult to further reduce the energy consumption of the product when it is in standby mode. Summary of the invention

[0004] Based on this, the present invention provides a battery-based low-power supply method. When switching to low-power mode, the DC-DC is turned off. At this time, the voltage input source of the MCU is switched from the DC-DC to the battery's resistance divider circuit, so that when the DC-DC is turned off, the MCU can still maintain normal operation, thereby effectively reducing the energy consumption of the product when it is in standby mode.

[0005] A low-power supply method based on a battery comprises the following steps:

[0006] S10: Whether the MCU obtains the low power mode trigger signal; if not, jump to step S20; if yes, jump to step S30;

[0007] S20: Maintain the DC-DC in the on state, the DC-DC output voltage to the power pin of the MCU is V1, the battery output voltage to the power pin of the MCU through the resistor voltage divider circuit is V2, and 0<V2<V1, at this time, the input voltage of the power pin of the MCU is V1;

[0008] S30: MCU sends a shutdown signal to the DC-DC to control the DC-DC to shut down. The DC-DC outputs a voltage of 0 to the power pin of the MCU. The battery outputs a voltage of V2 to the power pin of the MCU through a resistor divider circuit. At this time, the input voltage of the power pin of the MCU is V2.

[0009] The above-mentioned battery-based low-power power supply method sets a resistor voltage divider circuit at the battery, and uses the resistor voltage divider circuit to provide the MCU with a voltage that can work normally in low-power mode. In normal mode, the DC-DC is turned on, and the DC-DC supplies power to the MCU. In low-power mode, the MCU controls the DC-DC to turn off, and at this time, the battery supplies power to the MCU through the resistor voltage divider circuit. Through the above design, when switching to low-power mode, the DC-DC is turned off. At this time, the voltage input source of the MCU is switched from the DC-DC to the resistor voltage divider circuit of the battery, so that when the DC-DC is turned off, the normal operation of the MCU can still be maintained, thereby effectively reducing the energy consumption of the product when it is in standby mode.

[0010] In one embodiment, in step S20 and step S30, if V0 < V3, the discharge function of the output end of the battery is cut off; if V0 ≥ V3, the discharge function of the output end of the battery is maintained; wherein V0 is the real-time voltage of the output end of the battery, and V3 is the preset minimum protection voltage of the battery. As the battery continues to discharge, the discharge voltage of the battery will gradually decrease. Therefore, in order to protect the battery and the MCU, when the discharge voltage of the output end of the battery drops to the preset minimum protection voltage, the discharge function of the output end of the battery needs to be cut off.

[0011] In one of the embodiments, in step S10, the low power mode trigger signal is: a low power mode trigger signal sent to the MCU through the human-computer interaction interface.

[0012] In one of the embodiments, in step S10, the low power mode trigger signal is: a low power mode trigger signal generated by the MCU itself when a preset condition for automatically entering the low power mode is met.

[0013] In one of the embodiments, in step S30, after the DC-DC is turned off, if the MCU obtains a normal mode wake-up signal, the MCU sends a start signal to the DC-DC to control the DC-DC to turn on, and then jumps to step S10.

[0014] In one of the embodiments, in step S30, the normal mode wake-up signal is: a normal mode wake-up signal sent to the MCU through the human-computer interaction interface.

[0015] In one of the embodiments, in step S30, the normal mode wake-up signal is: a normal mode wake-up signal generated by the MCU itself when a preset condition for automatically entering the normal mode is met.

[0016] At the same time, the present invention provides a battery-based power supply.

[0017] A battery-based power supply is controlled by using the battery-based power supply low-power supply method of any of the above embodiments.

[0018] The battery-based power supply mentioned above turns off the DC-DC when switching to low power mode. At this time, the voltage input source of the MCU is switched from the DC-DC to the battery's resistor divider circuit, so that when the DC-DC is turned off, the MCU can still operate normally, thereby effectively reducing the energy consumption of the product when it is in standby mode.

[0019] In one embodiment, the battery-based power supply includes: a battery, a resistor voltage divider circuit, a DC-DC, and an MCU; the output end of the battery is respectively connected to the input end of the resistor voltage divider circuit and the input end of the DC-DC; the power pin of the MCU is respectively connected to the output end of the resistor voltage divider circuit and the output end of the DC-DC; the enable signal output pin of the MCU is connected to the control end of the DC-DC; the battery-based power supply low-power supply method is stored in the form of program code in the memory of the MCU or in a readable storage medium connected to the MCU.

[0020] In one embodiment, the resistor voltage divider circuit is provided with a voltage stabilizing module, which can stabilize the voltage at the output end of the resistor voltage divider circuit, so that the MCU can obtain a relatively stable input voltage in the low power consumption mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A flowchart of a low-power supply method based on a battery according to an embodiment of the present invention;

[0022] Figure 2 A block diagram of a battery-based power supply according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0028] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0029] like Figure 1 As shown, it is a battery-based low-power supply method according to an embodiment of the present invention.

[0030] like Figure 1 As shown, the battery-based low-power supply method includes the following steps:

[0031] S10: Whether the MCU obtains the low power mode trigger signal; if not, jump to step S20; if yes, jump to step S30.

[0032] In this embodiment, the low power consumption mode trigger signal may be a trigger signal input by a user, or may be a trigger signal generated by an MCU when the product reaches a preset condition.

[0033] For example, in step S10, the low power mode trigger signal is: a low power mode trigger signal sent to the MCU through the human-computer interaction interface. For example, when the MCU receives a low power mode trigger instruction from the human-computer interaction interface, such as a corresponding key signal or remote control signal, the MCU controls the power supply to switch to the low power mode.

[0034] For another example, in step S10, the low power mode trigger signal is: when the preset conditions for automatically entering the low power mode are met, the MCU generates a low power trigger signal by itself. For example, when the MCU does not receive a working instruction from any functional module within a preset duration, the MCU generates a low power trigger signal by itself and controls the power supply to switch to the low power mode.

[0035] In step S10, the low power mode trigger signal is: a low power mode trigger signal sent to the MCU through the human-computer interaction interface.

[0036] S20: Maintain the DC-DC in the on state, the DC-DC output voltage to the power pin of the MCU is V1, the battery output voltage to the power pin of the MCU through the resistor voltage divider circuit is V2, and 0<V2<V1, at this time, the input voltage of the power pin of the MCU is V1.

[0037] S30: MCU sends a shutdown signal to the DC-DC to control the DC-DC to shut down. The DC-DC outputs a voltage of 0 to the power pin of the MCU. The battery outputs a voltage of V2 to the power pin of the MCU through a resistor divider circuit. At this time, the input voltage of the power pin of the MCU is V2.

[0038] Since the low power mode is a standby mode, when any functional module in the product needs to execute a working instruction, the MCU needs to wake up the DC-DC and switch the power supply to normal mode. For example, in step S30, after the DC-DC is turned off, if the MCU obtains a normal mode wake-up signal, the MCU sends a start signal to the DC-DC to control the DC-DC to turn on, and then jumps to step S10.

[0039] In this embodiment, the normal mode trigger signal may be a trigger signal input by a user, or may be a trigger signal generated by an MCU when the product reaches a preset condition.

[0040] For example, in step S30, the normal mode wake-up signal is: a normal mode wake-up signal sent to the MCU through the human-computer interaction interface.

[0041] For another example, in step S30, the normal mode wake-up signal is: when the preset conditions for automatically entering the normal mode are met, the MCU generates the normal mode wake-up signal itself.

[0042] Considering that as the battery continues to discharge, the voltage at the output end of the battery will become lower and lower, there is a risk that the normal operating voltage of the MCU cannot be met in low power mode. In response to the above problem, in some embodiments, in step S20 and step S30, if V0 < V3, the discharge function of the output end of the battery is cut off; if V0 ≥ V3, the discharge function of the output end of the battery is maintained; wherein V0 is the real-time voltage of the output end of the battery, and V3 is the preset minimum protection voltage of the battery. As the battery continues to discharge, the discharge voltage of the battery will gradually decrease. Therefore, in order to protect the battery and the MCU, when the discharge voltage at the output end of the battery drops to the preset minimum protection voltage, the discharge function of the output end of the battery needs to be cut off.

[0043] Taking the common MCU in the market as an example, the normal working voltage range of MCU is 1.6V~5.5V. Therefore, in order for MCU to work normally in low power mode, the setting value of V2 cannot be lower than 1.6V. By designing the voltage division ratio of the resistor voltage divider circuit, assuming that the minimum protection voltage V3 of the battery is 11V (when the protection voltage is reached, the battery will enter the protection state and cut off the external discharge function), when the discharge voltage of the battery drops to 11V, the output end of the resistor voltage divider circuit can provide at least 1.6V voltage for the MCU.

[0044] Furthermore, the switching and maintenance of the discharge function of the output end of the battery can be achieved through the control circuit of the battery itself, or through the above-mentioned MCU, or through the control circuit of the battery itself and the above-mentioned MCU (ie, dual monitoring protection).

[0045] Brief description of working principle:

[0046] A resistor voltage divider circuit is set at the battery, and the resistor voltage divider circuit is used to provide the MCU with a voltage that can work normally in low power mode. In normal mode, the DC-DC is turned on and the DC-DC supplies power to the MCU. In low power mode, the MCU controls the DC-DC to turn off, and at this time, the battery supplies power to the MCU through the resistor voltage divider circuit.

[0047] Taking a 14.8V-2600mAh battery as an example, when paired with a DC-DC built around the JW5026 buck chip, in low-power mode, if the DC-DC is used to power the MCU, the measured discharge current of the battery is about 15mA, and after being modified to power the MCU with a resistor divider circuit, the measured discharge current of the battery is about 2.5mA. Comparing the two, it can be seen that in low-power mode, the low-power power supply method of this embodiment can significantly reduce the standby energy consumption of the product.

[0048] The above-mentioned battery-based low-power power supply method turns off the DC-DC when switching to low-power mode. At this time, the voltage input source of the MCU is switched from the DC-DC to the battery's resistor divider circuit, so that when the DC-DC is turned off, the MCU can still maintain normal operation, thereby effectively reducing the energy consumption of the product when it is in standby mode.

[0049] like Figure 2 As shown, it is a battery-based power supply of an embodiment of the present invention.

[0050] The battery-based power supply is controlled by the battery-based power supply low-power supply method of the above embodiment. When switching to low-power mode, the DC-DC is turned off. At this time, the voltage input source of the MCU is switched from the DC-DC to the battery's resistor divider circuit, so that when the DC-DC is turned off, the MCU can still maintain normal operation, thereby effectively reducing the energy consumption of the product when it is in standby mode.

[0051] For ease of understanding, an application example of a battery-based power source is provided below.

[0052] like Figure 2As shown, the battery-based power supply includes: a battery, a resistor voltage divider circuit, a DC-DC, and an MCU. The output end of the battery is respectively connected to the input end of the resistor voltage divider circuit and the input end of the DC-DC. The power pins of the MCU are respectively connected to the output end of the resistor voltage divider circuit and the output end of the DC-DC. The enable signal output pin of the MCU is connected to the control end of the DC-DC. The battery-based power supply low-power supply method is stored in the form of program code in the memory of the MCU or in a readable storage medium connected to the MCU.

[0053] Furthermore, considering that as the discharge time of the battery accumulates, the voltage at the output end of the battery will gradually decrease, thereby causing the voltage output by the resistor voltage divider circuit to decrease, and the voltage at the output end of the resistor voltage divider circuit may change or fluctuate significantly, so in response to the above problem, in some embodiments, the resistor voltage divider circuit may be provided with a voltage stabilizing module. The voltage stabilizing module can stabilize the voltage at the output end of the resistor voltage divider circuit, so that in low power consumption mode, the MCU can obtain a relatively stable input voltage.

[0054] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The above embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A low-power power supply method based on a battery, characterized in that: Includes steps: S10: Whether the MCU obtains the low power mode trigger signal; if not, jump to step S20; if yes, jump to step S30; S20: Maintain the DC-DC in the on state, the DC-DC output voltage to the power pin of the MCU is V1, the battery output voltage to the power pin of the MCU through the resistor voltage divider circuit is V2, and 0<V2<V1, at this time, the input voltage of the power pin of the MCU is V1; S30: MCU sends a shutdown signal to the DC-DC to control the DC-DC to shut down. The DC-DC outputs a voltage of 0 to the power pin of the MCU. The battery outputs a voltage of V2 to the power pin of the MCU through a resistor divider circuit. At this time, the input voltage of the power pin of the MCU is V2.

2. The low-power power supply method based on a battery according to claim 1, characterized in that: In step S20 and step S30, if V0<V3, the discharge function of the output end of the battery is cut off; if V0≥V3, the discharge function of the output end of the battery is maintained; wherein V0 is the real-time voltage of the output end of the battery, and V3 is the preset minimum protection voltage of the battery.

3. The low-power power supply method based on a battery according to claim 1, characterized in that: In step S10, the low power mode trigger signal is: a low power mode trigger signal sent to the MCU through the human-computer interaction interface.

4. The low-power power supply method based on a battery according to claim 1, characterized in that: In step S10, the low power mode trigger signal is: when the preset conditions for automatically entering the low power mode are met, the MCU generates the low power trigger signal itself.

5. The low-power power supply method based on a battery according to claim 1, characterized in that: In step S30 , after the DC-DC is turned off, if the MCU obtains a normal mode wake-up signal, the MCU sends a start signal to the DC-DC to control the DC-DC to turn on, and then jumps to step S10 .

6. The low-power supply method based on a battery according to claim 5, characterized in that: In step S30, the normal mode wake-up signal is: a normal mode wake-up signal sent to the MCU through the human-computer interaction interface.

7. The low-power supply method based on a battery according to claim 5, characterized in that: In step S30, the normal mode wake-up signal is: when the preset conditions for automatically entering the normal mode are met, the MCU generates the normal mode wake-up signal itself.

8. A battery-based power source, characterized in that The control is performed using the battery-based low-power supply method described in any one of claims 1 to 7.

9. The battery-based power supply of claim 8, wherein: include: A battery, a resistor voltage divider circuit, a DC-DC, and an MCU; the output end of the battery is respectively connected to the input end of the resistor voltage divider circuit and the input end of the DC-DC; the power pins of the MCU are respectively connected to the output end of the resistor voltage divider circuit and the output end of the DC-DC; the enable signal output pin of the MCU is connected to the control end of the DC-DC; the battery-based low-power supply method is stored in the form of program code in the memory of the MCU or in a readable storage medium connected to the MCU.

10. The battery-based power supply of claim 9, wherein: The resistor voltage-dividing circuit is provided with a voltage-stabilizing module.

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