Battery energy-saving circuit, battery energy-saving device and monitor

Abstract

The utility model discloses a battery energy-saving circuit, a device and a monitor, and relates to the technical field of medical instruments, the battery energy-saving circuit comprises a switch control module, the first end of the switch control module is connected with a battery control port, the second end of the switch control module is connected with battery voltage, and the switch control module is used for controlling the battery energy-saving circuit to be disconnected when an MCU is powered off; the first end of the voltage monitoring module is connected with the third end of the switch control module, the second end of the voltage monitoring module is connected with the ADC input port of the MCU, and the voltage monitoring module is used for monitoring the voltage of the battery; according to the technical scheme, the switch control module is adopted to control the voltage monitoring module to be powered off when the host is powered off, compared with an existing voltage monitoring circuit, the voltage monitoring circuit can enable the voltage monitoring module to be powered off when the host is powered off, electricity cannot be consumed when the host is powered off, and the service life of a battery can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a battery energy-saving circuit, device and monitor. Background Art

[0002] In the battery management system, battery voltage monitoring is an important component, which is responsible for monitoring the battery voltage level in real time so that necessary management measures can be taken in time.

[0003] Currently, most portable electronic devices are equipped with a battery voltage monitoring circuit that can continuously monitor the battery voltage when the device is in operation or standby mode. The monitoring circuit usually includes a voltage detection circuit, a power management chip, and other necessary peripheral circuits. These circuits monitor the battery voltage by periodically reading the battery voltage and sending the data to the main control unit.

[0004] However, existing battery voltage monitoring circuits cannot be disconnected when the device is turned off and continue to operate. This causes the battery to continue discharging even when the device is completely shut down, affecting battery life. Therefore, designing a circuit that can automatically disconnect the battery voltage monitoring circuit when the device is turned off to reduce unnecessary battery power consumption has become a pressing technical problem. Utility Model Content

[0005] The main purpose of the utility model is to propose a battery energy-saving circuit, a battery energy-saving device and a monitor, aiming to solve the technical problem of how to design a circuit that can automatically cut off the battery voltage monitoring loop when the device is turned off.

[0006] To achieve the above objectives, the battery energy-saving circuit proposed by the present invention includes:

[0007] A switch control module, wherein a first end of the switch control module is connected to the battery control port, and a second end of the switch control module is connected to the battery voltage, and is used to control the battery energy-saving circuit to be disconnected when the MCU is powered off;

[0008] A voltage monitoring module, wherein a first end of the voltage monitoring module is connected to the third end of the switch control module, and a second end of the voltage monitoring module is connected to the ADC input port of the MCU, and is used to monitor the battery voltage.

[0009] In one embodiment, the switch control module includes: a first resistor, a second resistor, a third resistor, a fourth resistor, a transistor, and a MOS transistor;

[0010] A first end of the first resistor is connected to the battery voltage, and a second end of the first resistor is connected to a first end of the second resistor;

[0011] The first end of the second resistor is also connected to the gate of the MOS transistor, and the second end is connected to the collector of the transistor;

[0012] A first end of the third resistor is connected to the battery control port, and a second end of the third resistor is connected to the base of the transistor;

[0013] The first end of the fourth resistor is connected to the second end of the third resistor, and the second end of the fourth resistor is grounded;

[0014] The emitter of the triode is grounded;

[0015] The source of the MOS transistor is connected to the first end of the first resistor, and the drain of the MOS transistor is connected to the voltage monitoring module.

[0016] In one embodiment, when the host is powered on, the battery control port inputs a high level, the transistor is turned on, the first resistor and the second resistor divide the battery voltage, the MOS tube is turned on, and the voltage monitoring module works normally.

[0017] In one embodiment, when the host is shut down, the battery control port is powered off, the fourth resistor pulls down the base voltage of the transistor, the transistor is turned off, the MOS transistor is turned off, and the voltage monitoring module is powered off.

[0018] In one embodiment, the battery control port is connected to an I / O output port of the MCU.

[0019] In one embodiment, the battery control port is connected to a 3.3V or 5V power supply.

[0020] In one embodiment, the voltage monitoring module includes: a fifth resistor and a sixth resistor;

[0021] A first end of the fifth resistor is connected to the switch control module, and a second end of the fifth resistor is connected to the ADC input port of the MCU;

[0022] A first end of the sixth resistor is connected to the second end of the fifth resistor, and a second end of the sixth resistor is grounded.

[0023] In one embodiment, the fifth resistor and the sixth resistor form a voltage divider circuit.

[0024] The present utility model also provides a battery energy-saving device, which includes the battery energy-saving circuit described above.

[0025] The present invention also provides a monitor, which includes the battery energy-saving device described above.

[0026] The technical solution of the present invention uses a switch control module to control the voltage monitoring module to cut off power when the host is powered off. Compared with the existing voltage monitoring circuit, the present application can make the voltage monitoring module cut off power at the same time as the host is powered off, and will not consume power when the host is powered off, which can improve the battery life. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description 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 the structures shown in these drawings without paying any creative work.

[0028] Figure 1 This is a module diagram of an embodiment of a battery energy-saving circuit provided by the present utility model;

[0029] Figure 2 A partial circuit diagram of an embodiment of a battery energy-saving circuit provided by the present utility model;

[0030] Figure 3 A partial circuit diagram of an embodiment of a battery energy-saving circuit provided by the present utility model;

[0031] Figure 4 This is a circuit diagram of an embodiment of a battery energy-saving circuit provided by the present utility model.

[0032] Description of Figure Numbers:

[0033] 10. Switch control module; R1 to R4, first to fourth resistors; Q1, MOS tube; Q2, transistor;

[0034] 20. Voltage monitoring module; R5 to R6, fifth resistor to sixth resistor.

[0035] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0037] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0039] The utility model provides a battery energy-saving circuit.

[0040] See also Figure 1 In one embodiment of the present invention, the battery energy-saving circuit includes:

[0041] A switch control module, wherein a first end of the switch control module is connected to the battery control port, and a second end of the switch control module is connected to the battery voltage, and is used to control the battery energy-saving circuit to be disconnected when the MCU is powered off;

[0042] A voltage monitoring module, wherein a first end of the voltage monitoring module is connected to the third end of the switch control module, and a second end of the voltage monitoring module is connected to the ADC input port of the MCU, and is used to monitor the battery voltage.

[0043] In this embodiment, the first terminal of the switch control module is connected to the battery control port. This can be an output pin of the MCU, used to send a signal to the switch control module, instructing it when to open or close the current path. The second terminal is connected to the battery voltage. The voltage monitoring module is responsible for monitoring the battery voltage status in real time and passing this information to the MCU for processing. The first terminal is connected to the third terminal of the switch control module. The second terminal is connected to the ADC (analog-to-digital converter) input port of the MCU. The ADC converts analog signals (such as battery voltage) into digital signals so that the MCU can understand and process this information.

[0044] Specifically, in a feasible implementation manner, the switch control module includes: a first resistor, a second resistor, a third resistor, a fourth resistor, a triode and a MOS tube;

[0045] A first end of the first resistor is connected to the battery voltage, and a second end of the first resistor is connected to a first end of the second resistor;

[0046] The first end of the second resistor is also connected to the gate of the MOS transistor, and the second end is connected to the collector of the transistor;

[0047] A first end of the third resistor is connected to the battery control port, and a second end of the third resistor is connected to the base of the transistor;

[0048] The first end of the fourth resistor is connected to the second end of the third resistor, and the second end of the fourth resistor is grounded;

[0049] The emitter of the triode is grounded;

[0050] The source of the MOS transistor is connected to the first end of the first resistor, and the drain of the MOS transistor is connected to the voltage monitoring module.

[0051] In this embodiment, please refer to Figure 2 , the circuit structure in the switch control module is as follows Figure 2 As shown in the figure, the connection method is as follows: the first end of the first resistor is connected to the battery voltage, and the second end is connected to the first end of the second resistor; the first end of the second resistor is also connected to the gate of the MOS tube, and the second end is connected to the collector of the transistor; the first end of the third resistor is connected to the battery control port, and the second end is connected to the base of the transistor; the first end of the fourth resistor is connected to the second end of the third resistor, and the second end is grounded; the emitter of the transistor is grounded; the source of the MOS tube is connected to the first end of the first resistor, and the drain of the MOS tube is connected to the voltage monitoring module.

[0052] Specifically, in a feasible implementation, when the host is powered on, the battery control port inputs a high level, the transistor is turned on, the first resistor and the second resistor divide the battery voltage, the MOS tube is turned on, and the voltage monitoring module works normally.

[0053] In this embodiment, the switching circuit consists of a P-MOS transistor Q6, an NPN transistor Q5, and resistors R16, R17, R18, and R19. "MCU_BAT_CTL" is connected to the I / O output port of the MCU. After the host is turned on, the MCU outputs a high level, the transistor Q5 is turned on, R16 and R17 divide the VBAT voltage, and the gate-source voltage of Q6 is: Vg<Vs. Q6 is turned on, and the battery voltage monitoring circuit operates normally.

[0054] Specifically, in a feasible implementation, when the host is shut down, the battery control port is powered off, the fourth resistor pulls down the base voltage of the transistor, the transistor is turned off, the MOS transistor is turned off, and the voltage monitoring module is powered off.

[0055] In this embodiment, the host is shut down, the MCU is powered off, and resistor R19 is grounded, pulling down the base voltage of transistor Q5. This turns off Q5, and the gate-source voltage of Q6 reaches Vg = Vs. Q6 is then turned off, disconnecting the battery voltage monitoring circuit and preventing current from flowing. This effectively saves battery power.

[0056] Specifically, in a feasible implementation manner, the battery control port is connected to an I / O output port of the MCU.

[0057] In this embodiment, the battery control port can be connected to the I / O output port of the MCU.

[0058] Specifically, in a feasible implementation manner, the battery control port is connected to a 3.3V or 5V power supply.

[0059] In this embodiment, in order to save the interface resources of the MCU, "MCU_BAT_CTL" can be connected to a 3.3V or 5V power supply.

[0060] Specifically, in a feasible implementation manner, the voltage monitoring module includes: a fifth resistor and a sixth resistor;

[0061] A first end of the fifth resistor is connected to the switch control module, and a second end of the fifth resistor is connected to the ADC input port of the MCU;

[0062] A first end of the sixth resistor is connected to the second end of the fifth resistor, and a second end of the sixth resistor is grounded.

[0063] In this embodiment, please refer to Figure 3 , the connection method of the components in the voltage monitoring module is as follows Figure 3 As shown, the first end of the fifth resistor is connected to the switch control module, and the second end is connected to the ADC input port of the MCU; the first end of the sixth resistor is connected to the second end of the fifth resistor, and the second end is grounded.

[0064] Specifically, in a feasible implementation manner, the fifth resistor and the sixth resistor form a voltage divider circuit.

[0065] In this embodiment, the fifth resistor and the sixth resistor form a voltage divider circuit, so that the MCU can monitor the voltage of the circuit in real time.

[0066] Specifically, such as Figure 4 As shown, the technical solution of the present invention controls the power-off of the voltage monitoring module when the host is powered off by adopting a switch control module. Compared with the existing voltage monitoring circuit, the present application can make the voltage monitoring module power off at the same time as the host is powered off, and will not consume power when the host is powered off, which can improve the battery life.

[0067] The present utility model also proposes a battery energy-saving device, which includes a battery energy-saving circuit. The specific structure of the battery energy-saving circuit refers to the above-mentioned embodiment. Since the battery energy-saving device adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0068] The present invention also provides a monitor, which includes a battery energy-saving device. The specific structure of the battery energy-saving circuit refers to the above-mentioned embodiment. Since the present monitor adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0069] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A battery energy-saving circuit, characterized in that: The battery energy-saving circuit comprises: A switch control module, wherein a first end of the switch control module is connected to the battery control port, and a second end of the switch control module is connected to the battery voltage, and is used to control the battery energy-saving circuit to be disconnected when the MCU is powered off; A voltage monitoring module, wherein a first end of the voltage monitoring module is connected to the third end of the switch control module, and a second end of the voltage monitoring module is connected to the ADC input port of the MCU, and is used to monitor the battery voltage.

2. The battery energy-saving circuit according to claim 1, wherein: The switch control module includes: a first resistor, a second resistor, a third resistor, a fourth resistor, a triode and a MOS tube; A first end of the first resistor is connected to the battery voltage, and a second end of the first resistor is connected to a first end of the second resistor; The first end of the second resistor is also connected to the gate of the MOS transistor, and the second end is connected to the collector of the transistor; A first end of the third resistor is connected to the battery control port, and a second end of the third resistor is connected to the base of the transistor; The first end of the fourth resistor is connected to the second end of the third resistor, and the second end of the fourth resistor is grounded; The emitter of the triode is grounded; The source of the MOS transistor is connected to the first end of the first resistor, and the drain of the MOS transistor is connected to the voltage monitoring module.

3. The battery energy-saving circuit according to claim 2, wherein: When the host is powered on, the battery control port inputs a high level, the transistor is turned on, the first resistor and the second resistor divide the battery voltage, the MOS tube is turned on, and the voltage monitoring module works normally.

4. The battery energy-saving circuit according to claim 3, wherein: When the host is shut down, the battery control port is powered off, the fourth resistor pulls down the base voltage of the transistor, the transistor is turned off, the MOS transistor is turned off, and the voltage monitoring module is powered off.

5. The battery energy-saving circuit according to claim 1, wherein: The battery control port is connected to the I / O output port of the MCU.

6. The battery energy-saving circuit according to claim 1, wherein: The battery control port is connected to a 3.3V or 5V power supply.

7. The battery energy-saving circuit according to claim 1, wherein: The voltage monitoring module includes: a fifth resistor and a sixth resistor; A first end of the fifth resistor is connected to the switch control module, and a second end of the fifth resistor is connected to the ADC input port of the MCU; A first end of the sixth resistor is connected to the second end of the fifth resistor, and a second end of the sixth resistor is grounded.

8. The battery energy-saving circuit according to claim 7, wherein: The fifth resistor and the sixth resistor form a voltage divider circuit.

9. A battery energy-saving device, characterized in that: The battery energy-saving device comprises the battery energy-saving circuit according to any one of claims 1 to 8.

10. A monitor, characterized in that: The patient monitor includes the battery energy saving device as claimed in claim 9.

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