Power consumption management circuit suitable for lithium battery

Abstract

The utility model provides a power consumption management circuit suitable for a lithium battery. The power consumption management circuit comprises a switching power supply, a post-stage power supply unit, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, an XH connector, a PMOS tube, a triode, a photoelectric coupler and a trigger. The switching power supply is electrically connected with the XH connector No.2 interface, the trigger D1 interface, the trigger VCC interface, the photoelectric coupler, the first resistor and the PMOS tube, the first resistor is electrically connected with the triode and the PMOS tube, the PMOS tube is electrically connected with the post-stage power supply unit, the triode is electrically connected with the fourth resistor and is grounded, and the fourth resistor is electrically connected with the photoelectric coupler. The second resistor is electrically connected with a trigger No.1 interface, the trigger interface is electrically connected with the fifth resistor and is grounded, a trigger RST1 interface is electrically connected with the fifth resistor and the photoelectric coupler, the third resistor is electrically connected with a trigger CLK1 interface, the photoelectric coupler is electrically connected with the sixth resistor and is grounded, and the sixth resistor is electrically connected with the fifth resistor and is grounded. Therefore, the utility model has the advantage of reducing the power consumption of the lithium battery.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium batteries, and in particular relates to a power consumption management circuit suitable for lithium batteries. Background Art

[0002] With the development of lithium battery industry technology, lithium battery management system technology is developing faster and faster. There are two ways to manage the power consumption of lithium batteries: the first is to shut down unnecessary hardware peripherals according to the use of lithium batteries; the second is to dynamically adjust the operating frequency of the main control system according to the use of lithium batteries. When the main control system does not need high-speed computing, the system frequency is reduced, and the main control system can even be put into sleep mode.

[0003] However, for lithium battery storage mode or when not in use for a long time, power consumption cannot be further reduced. Utility Model Content

[0004] The utility model provides a power consumption management circuit suitable for lithium batteries, which can reduce the power consumption of lithium batteries during storage.

[0005] The technical solution of the utility model is implemented as follows: a power consumption management circuit suitable for lithium batteries includes a switching power supply, a post-stage power supply unit, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, an XH connector, a PMOS tube, a triode, a photocoupler and a trigger. The switching power supply is electrically connected to the XH connector No. 2 interface, the trigger D1 interface, the trigger VCC interface, the photocoupler, the first resistor and the PMOS tube, the first resistor is electrically connected to the triode and the PMOS tube, the PMOS tube is electrically connected to the post-stage power supply unit, the triode is electrically connected to the fourth resistor and grounded, the second resistor is electrically connected to the trigger No. 1 interface, the trigger interface is electrically connected to the fifth resistor and grounded, the trigger RST1 interface is electrically connected to the fifth resistor and the photocoupler, the third resistor is electrically connected to the trigger CLK1 interface, the photocoupler is electrically connected to the sixth resistor, and the photocoupler is grounded.

[0006] As a preferred implementation, the cathode of the photocoupler LED is grounded, the anode of the photocoupler LED is electrically connected to the sixth resistor, the collector of the photocoupler is electrically connected to the switching power supply, the XH connector No. 2 interface, the trigger D1 interface, the trigger VCC interface, the first resistor and the PMOS tube, and the emitter of the photocoupler is electrically connected to the trigger RST1 interface and the fifth resistor to ensure the stability of the current direction of the circuit.

[0007] As a preferred implementation, the transistor collector is electrically connected to the first resistor and the PMOS tube, the transistor base is electrically connected to the second resistor and the fourth resistor, and the transistor emitter is electrically connected to the fourth resistor and grounded to protect the circuit and reduce circuit power consumption.

[0008] As a preferred implementation, the source of the PMOS tube is electrically connected to the switching power supply, the XH connector No. 2 interface, the trigger D1 interface, the trigger VCC interface, the photocoupler and the first resistor, the gate of the PMOS tube is electrically connected to the transistor and the first resistor, and the drain of the PMOS tube is electrically connected to the subsequent power supply unit.

[0009] After adopting the above technical solution, the beneficial effect of the utility model is that when the lithium battery is left for a long time or is not activated, the power consumption of the lithium battery can be effectively reduced and the life of the lithium battery can be extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0011] Figure 1 : A power consumption management circuit diagram suitable for lithium batteries.

[0012] Figure 1 In the figure, VIN-switching power supply; VUP-post-power supply unit; R1-first resistor; R2-second resistor; R3-third resistor; R4-fourth resistor; R5-fifth resistor; R6-sixth resistor; J1-XH connector; U1-PMOS tube; U2-trigger; U3-photocoupler; Q1-transistor. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0014] according to Figure 1As shown, a power consumption management circuit suitable for a lithium battery includes a switching power supply VI N, a post-stage power supply unit VUP, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, an XH connector J1, a PMOS tube U1, a transistor Q1, a photocoupler U3 and a trigger U2. The switching power supply VI N is electrically connected to the XH connector J12 interface, the trigger U2D1 interface, the trigger U2VCC interface, the photoelectric coupler U3, the first resistor R1 and the PMOS tube U1, the first resistor R1 is electrically connected to the transistor Q1 and the PMOS tube U1, the PMOS tube is electrically connected to the post-stage power supply unit, the transistor Q1 is electrically connected to the fourth resistor R4 and grounded, the second resistor R2 is electrically connected to the trigger U21 interface, the trigger U2 interface is electrically connected to the fifth resistor R5 and grounded, the trigger U2RST1 interface is electrically connected to the fifth resistor R5 and the photoelectric coupler U3, the third resistor R3 is electrically connected to the trigger U2CLK1 interface, the photoelectric coupler U3 is electrically connected to the sixth resistor R6, and the photoelectric coupler U3 is grounded.

[0015] The cathode of the photoelectric coupler U3LED is grounded, the anode of the photoelectric coupler U3LED is electrically connected to the sixth resistor R6, the collector of the photoelectric coupler U3 is electrically connected to the switching power supply VIN, the XH connector J12 interface, the trigger U2D1 interface, the trigger U2VCC interface, the first resistor R1 and the PMOS tube U1, and the emitter of the photoelectric coupler U3 is electrically connected to the trigger U2RST1 interface and the fifth resistor R5 to ensure the stability of the current direction of the circuit.

[0016] The collector of transistor Q1 is electrically connected to the first resistor R1 and PMOS tube U1, the base of transistor Q1 is electrically connected to the second resistor R2 and the fourth resistor R4, and the emitter of transistor Q1 is electrically connected to the fourth resistor R4 and grounded to protect the circuit and reduce circuit power consumption.

[0017] The PMOS tube U1 is electrically connected to the switching power supply VIN, the XH connector J12 interface, the trigger U2D1 interface, the trigger U2VCC interface, the photocoupler U3 and the first resistor R1, the PMOS tube U1 is electrically connected to the transistor Q1 and the first resistor R1, and the PMOS tube is electrically connected to the subsequent power supply unit.

[0018] During actual use, the switching power supply VIN part converts the total battery voltage to the voltage range required by the lithium battery management system, and then controls the power supply to the subsequent stage through the PMOS tube U1.

[0019] When the battery is just assembled, the switching power supply VIN outputs voltage, the trigger U2 works, the output of pin 1 is low, the transistor Q1 is turned off, the PMOS tube U1 is turned off, and the subsequent stage is not powered. At this time, the system power consumption is only the power consumption of the optocoupler U3 and the power consumption of the switching power supply VIN itself. At this time, the system power consumption is extremely low.

[0020] The lithium battery is powered off in the storage mode or when not in use, which further reduces power consumption compared to the current power management methods. This extends the maintenance-free time of the lithium battery and improves the convenience of using lithium batteries for customers.

[0021] When the battery needs to be used, short-circuit the XH connector J1, the pin 1 of the trigger U2 outputs high, the transistor Q1 turns on, the photocoupler U3 turns on, the subsequent stage is powered, and starts working. At this time, even if the XH connector J1 is disconnected, the pin 1 of the trigger U2 remains high. When the battery is not used for a long time, or the battery is in storage mode, the main control part controls MCU_CLOSE to output a high level, the photocoupler U3 turns on, and the pin 4 of the trigger U2 is a high level. At this time, the trigger U2 is reset, the pin 1 of the trigger U2 outputs low, the transistor Q1 is turned off, the PMOS tube U1 is turned off, and the subsequent stage is not powered.

[0022] In the description of the present utility model, it should be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" 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 utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In the description of the present utility model, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be a direct connection, or it can be an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0023] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A power consumption management circuit suitable for lithium batteries, characterized in that: It includes a switching power supply, a post-stage power supply unit, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, an XH connector, a PMOS tube, a triode, a photocoupler and a trigger; The switching power supply is electrically connected to XH connector interface No. 2, trigger D1 interface, trigger VCC interface, photoelectric coupler, first resistor and PMOS tube, the first resistor is electrically connected to the triode and PMOS tube, the PMOS tube is electrically connected to the post-stage power supply unit, the triode is electrically connected to the fourth resistor and grounded, the second resistor is electrically connected to trigger interface No. 1, the trigger interface is electrically connected to the fifth resistor and grounded, the trigger RST1 interface is electrically connected to the fifth resistor and photoelectric coupler, the third resistor is electrically connected to the trigger CLK1 interface, the photoelectric coupler is electrically connected to the sixth resistor, and the photoelectric coupler is grounded.

2. A power consumption management circuit suitable for lithium batteries according to claim 1, characterized in that: The cathode of the photocoupler LED is grounded, the anode of the photocoupler LED is electrically connected to the sixth resistor, the collector of the photocoupler is electrically connected to the switching power supply, the XH connector No. 2 interface, the trigger D1 interface, the trigger VCC interface, the first resistor and the PMOS tube, and the emitter of the photocoupler is electrically connected to the trigger RST1 interface and the fifth resistor.

3. A power consumption management circuit suitable for lithium batteries according to claim 2, characterized in that: The transistor collector is electrically connected to the first resistor and the PMOS tube, the transistor base is electrically connected to the second resistor and the fourth resistor, and the transistor emitter is electrically connected to the fourth resistor and grounded.

4. A power consumption management circuit suitable for lithium batteries according to claim 3, characterized in that: The source of the PMOS tube is electrically connected to the switching power supply, the XH connector No. 2 interface, the trigger D1 interface, the trigger VCC interface, the photocoupler and the first resistor, the gate of the PMOS tube is electrically connected to the transistor and the first resistor, and the drain of the PMOS tube is electrically connected to the subsequent power supply unit.

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