Double-wire charging and power supply management circuit and electronic equipment

Abstract

The utility model provides a management circuit for double-wire charging and power supply and an electronic device, the management circuit is applied to the electronic device, the management circuit comprises a battery unit, a switch unit, a protection unit and a double-wire interface unit, the battery unit is connected with the switch unit, and the battery unit is used for supplying power to the electronic device; the switch unit and the double-wire interface unit are respectively connected with an internal system of the electronic equipment and the voltage output control module, and the switch unit controls the charging and power supply state of the battery unit; the switch unit is connected with the protection unit, the protection unit is connected with the double-wire interface unit, the double-wire interface unit is respectively connected with external electric equipment and a charger, and the protection unit is used for controlling the battery unit not to supply power to the external electric equipment when the switch unit is switched off and charging can only be carried out through the charger. According to the utility model, the double-wire power supply and charging functions of the electronic equipment can be realized without adding a special charging interface for the equipment or detaching the equipment for charging, so that the working efficiency is effectively improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of charging circuits, and particularly relates to a management circuit and an electronic device for dual-line charging and power supply. Background Art

[0002] In wireless industrial digital electronic detonator products, it generally consists of a wireless signal receiver and an ignition module. The wireless signal receiver is responsible for receiving wireless signals and then converting them into wired signals for transmission to the ignition module. At the same time, the wireless signal receiver has a battery and a physical switch inside. The wireless signal receiver is connected to the ignition module by at least two wires or more, that is, it has a positive electrode and a negative electrode for power supply, so as to realize power supply from the wireless receiver to the ignition module.

[0003] When the wireless signal receiver is produced and completed, if the battery runs out during use and testing, we need to charge the wireless signal receiver. Since the wireless signal receiver is usually disposable, and considering the waterproof problem and cost savings, a dedicated charging interface is not provided. Therefore, when the battery runs out, the wireless signal receiver needs to be disassembled to charge the battery. This operation is not advisable and impossible during construction or experiments. Even in a laboratory environment, disassembling, charging, and reassembling hundreds or thousands of wireless signal receivers is also a significant workload. For devices similar to the wireless signal receiver, when it has a battery but only has an interface for external power supply and does not have a dedicated charging interface, it is extremely inconvenient to charge such devices. Summary of the Utility Model

[0004] In view of the above deficiencies of the prior art, the utility model provides a management circuit and an electronic device for dual-line charging and power supply, effectively solving the problem that devices similar to the wireless signal receiver only have an interface for external power supply and do not have a dedicated charging interface, resulting in inconvenient charging.

[0005] In the first aspect of the utility model, the utility model provides a management circuit for dual-line charging and power supply. The management circuit is applied to an electronic device, and the management circuit includes a battery unit, a switch unit, a protection unit, and a dual-line interface unit, wherein:

[0006] The battery unit is connected to the first end of the switch unit, and the battery unit is used to supply power to the electronic device;

[0007] The second end of the switch unit is connected to the internal system and voltage output control module of the electronic device. The internal system and voltage output control module are connected to the dual-line interface unit, and the switch unit controls the charging and power supply state of the battery unit;

[0008] The third terminal of the switch unit is connected to the protection unit, the protection unit is connected to the two-wire interface unit, the first interface of the two-wire interface unit is connected to an external electrical device, the second interface of the two-wire interface unit is connected to a charger, and when the protection unit is used to control the switch unit to turn off, the battery unit does not supply power to the external electrical device, and charging can only be carried out through the charger.

[0009] Further, the protection unit includes a first diode, the positive electrode of the first diode is connected to the third terminal of the switch unit, and the negative electrode of the first diode is connected to the internal system and the voltage output control module.

[0010] Further, the protection unit further includes a second diode, the positive electrode of the second diode is connected to the negative electrode of the first diode, and the negative electrode of the second diode is connected to the internal system and the voltage output control module.

[0011] Further, both the first diode and the second diode are reverse diodes.

[0012] Further, the protection unit includes a first voltage-dividing resistor, a second voltage-dividing resistor, a bias resistor, a triode, and a PMOS transistor, where: the first end of the first voltage-dividing resistor is connected to the internal system and the voltage output control module, the second end of the first voltage-dividing resistor is connected to the first end of the second voltage-dividing resistor and the base of the triode, the second end of the second voltage-dividing resistor is grounded, the emitter of the triode is grounded, the collector of the triode is connected to the first end of the bias resistor and the gate of the PMOS transistor, the second end of the bias resistor is connected to the source of the PMOS transistor and is jointly connected to the third terminal of the switch unit, and the drain of the PMOS transistor is connected to the first end of the first voltage-dividing resistor and is jointly connected to the internal system and the voltage output control module.

[0013] Further, the switch unit is a single-pole double-throw switch.

[0014] Further, the battery unit adopts one or more of dry batteries, lithium batteries, storage batteries, and solar batteries.

[0015] Further, the management circuit further includes a battery management unit, and the battery management unit is connected to the battery unit.

[0016] In the second aspect of the present invention, the present invention provides an electronic device, and the electronic device includes a two-wire charging and power supply management circuit as described in the first aspect of the present invention.

[0017] Further, the electronic device further includes an internal system and a voltage output control module, which are respectively connected to the switch unit and the dual-line interface unit of the management circuit for dual-line charging and power supply. The internal system and the voltage output control module are used to control the working state of the electronic device and control whether to output voltage.

[0018] For the management circuit for dual-line charging and power supply and the electronic device provided by the present utility model, by adding devices such as diodes, devices similar to wireless signal receivers only need two wires to output power when working, and when turned off, these two wires can be cleverly used to charge the device. It can quickly charge when needed, without adding a dedicated charging interface for the device or disassembling the device for charging, effectively improving work efficiency and significantly reducing production costs. At the same time, by optimizing the connection method of the two wires and using waterproof materials, it is easier to achieve the waterproof design of the device and improve its reliability in different environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0020] Figure 1 FIG. 1 is a first schematic structural diagram of the management circuit for dual-line charging and power supply provided by an embodiment of the present utility model;

[0021] Figure 2 FIG. 2 is a first circuit schematic diagram of the management circuit for dual-line charging and power supply provided by an embodiment of the present utility model;

[0022] Figure 3 FIG. 3 is a second circuit schematic diagram of the management circuit for dual-line charging and power supply provided by an embodiment of the present utility model;

[0023] Figure 4 FIG. 4 is a third circuit schematic diagram of the management circuit for dual-line charging and power supply provided by an embodiment of the present utility model;

[0024] Figure 5 FIG. 5 is a second schematic structural diagram of the management circuit for dual-line charging and power supply provided by an embodiment of the present utility model;

[0025] Figure 6 FIG. 6 is a schematic structural diagram of an electronic device provided by an embodiment of the present utility model.

[0026] MAIN ELEMENT SYMBOL DESCRIPTION:

[0027] 100. Management circuit for dual-line charging and power supply; 110. Battery unit; 120. Switch unit; 130. Protection unit; 140. Dual-line interface unit; 150. Battery management unit; 200. Electronic device; 210. Internal system and voltage output control module; 300. External electrical device; 400. Charger; SW1. Single-pole double-throw switch; D1. First reverse diode; D2. Second reverse diode; R1. First voltage-dividing resistor; R2. Second voltage-dividing resistor; R3. Bias resistor; Q1. Triode; P1. PMOS transistor. Detailed implementation manner

[0028] To make the objectives, technical solutions, and advantages of the present utility model clearer, the following will further clearly and completely describe the technical solutions of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. It should be noted that the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0029] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more, unless otherwise specifically defined.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0031] In wireless industrial digital electronic detonator products, it generally consists of a wireless signal receiver and an ignition module. The wireless signal receiver is responsible for receiving wireless signals and then converting them into wired signals for transmission to the ignition module. At the same time, the wireless signal receiver has a battery and a physical switch inside. The wireless signal receiver is connected to the ignition module with at least two or more wires, that is, it has a positive electrode and a negative electrode for power supply, so as to realize power supply from the wireless receiver to the ignition module.

[0032] When the wireless signal receiver is produced and its battery runs low during use and testing, we need to charge the wireless signal receiver. Since the wireless signal receiver is usually disposable, and considering waterproofing and cost savings, a dedicated charging interface is not provided. Therefore, when the battery runs low, the wireless signal receiver needs to be disassembled to charge the battery. This operation is not advisable and not feasible during construction or experiments. Even in a laboratory environment, disassembling, charging, and reassembling hundreds or thousands of wireless signal receivers is no small task. For devices like the wireless signal receiver, when it has a battery but only an external power supply interface and no dedicated charging interface, it is extremely inconvenient to charge such devices.

[0033] Embodiment 1

[0034] In view of the above deficiencies of the prior art, an embodiment of the present invention provides a dual-line charging and power supply management circuit, which effectively solves the problem that devices similar to wireless signal receivers only have an external power supply interface and no dedicated charging interface, resulting in inconvenient charging. The dual-line charging and power supply management circuit is applied to electronic devices, which include but are not limited to wireless signal receivers, portable power supplies, industrial sensors, and portable monitors, etc. Figure 1 is the first structural schematic diagram of the dual-line charging and power supply management circuit provided by an embodiment of the present invention. As Figure 1 shown, the dual-line charging and power supply management circuit 100 includes a battery unit 110, a switch unit 120, a protection unit 130, and a dual-line interface unit 140.

[0035] The battery unit 110 is powered by one or more of dry batteries, lithium batteries, storage batteries, and solar batteries.

[0036] Figure 2 is the first circuit schematic diagram of the dual-line charging and power supply management circuit provided by an embodiment of the present invention. As Figure 2 shown, the switch unit 120 uses a single-pole double-throw switch SW1. The single-pole double-throw switch SW1 can control the battery unit 110 to output in two different directions to achieve circuit switching. The single-pole double-throw switch SW1 has two fixed terminals and one movable terminal. The movable terminal is connected to the incoming line of the battery unit 110, the first fixed terminal is connected to the internal system of the electronic device and the voltage output control module 210, and the second fixed terminal is connected to the protection unit 130. The internal system and voltage output control module 210 generally includes a micro-control unit and a voltage output control circuit, which are specifically determined according to the application scenarios of different electronic devices, and are mainly used to control the working state of the electronic device and at the same time control whether to output voltage to external electrical devices.

[0037] The protection unit 130 is connected to the two-wire interface unit 140. The first interface of the two-wire interface unit 140 is connected to the external electrical device 300, and the second interface of the two-wire interface unit 140 is connected to the charger 400. When the protection unit 130 is used to control the switch unit 120 to turn off, the battery unit 110 does not supply power to the external electrical device 300, and charging can only be carried out through the charger 400.

[0038] The protection unit 130 employs a first reverse diode D1. The positive electrode of the first reverse diode D1 is connected to the second fixed terminal of the single-pole double-throw switch SW1, and the negative electrode of the first reverse diode is connected to the internal system and voltage output control module 210. The first reverse diode D1 basically has no conductivity under positive voltage, but under reverse voltage, when the voltage exceeds its breakdown field strength, the current will increase rapidly, showing good reverse conductivity.

[0039] In the embodiment of the present utility model, when the internal system and voltage output control module 210 is powered on, the movable end and the first fixed terminal of the single-pole double-throw switch SW1 are connected, and power is supplied to the external electrical device 300 through the battery unit 110. The electronic device can provide power externally, and the internal system and voltage output control module 210 can perform step-up or non-step-up output. At this time, the output voltage passes through the first reverse diode D1 to the second fixed terminal of the single-pole double-throw switch SW1, which is suspended and does not affect the internal system and voltage output control module 210.

[0040] When the internal system and voltage output control module 210 is powered off, the movable end and the first fixed terminal of the single-pole double-throw switch SW1 are connected. At this time, the internal system and voltage output control module 210 is powered off. Due to the presence of the first reverse diode D1, the electrical energy of the battery unit 110 can be prevented from passing through the positive electrode of the entire device output, effectively ensuring that when the internal system and voltage output control module 210 is powered off, there is no voltage output at the positive and negative electrodes of the external interface. At this time, the charger 400 can be connected to the two-wire interface unit, so that the positive electrode passes through the first reverse diode D1, passes through the single-pole double-throw switch SW1, and is connected to the battery unit 110, realizing the function of no voltage output but being able to charge the battery unit 110 when the internal system and voltage output control module 210 is powered off.

[0041] As a preferred implementation manner of the embodiment of the present utility model, Figure 3 is the second circuit schematic diagram of the two-wire charging and power supply management circuit provided by the embodiment of the present utility model. As Figure 3 shown, on the basis of the above circuit, the protection unit 130 further includes a second reverse diode D2. The positive electrode of the second reverse diode D2 is connected to the negative electrode of the first reverse diode D1, and the negative electrode of the second reverse diode D2 is connected to the internal system and voltage output control module 210.

[0042] When the internal system and the voltage output control module 210 are powered off, if the charger is connected to the positive and negative electrodes for charging, and if the original part of the internal system and the voltage output control module 210 is not protected, it may cause the voltage to burn out the internal system and the voltage output control module 210. By adding the second reverse diode D2, the internal system and the voltage output control module 210 can be effectively protected from being burned by the charging voltage when the internal system and the voltage output control module 210 are powered off for charging.

[0043] As another preferred embodiment of the present invention, Figure 4 is the third circuit schematic diagram of the dual-line charging power supply management circuit provided by the embodiment of the present invention, as Figure 4 shown, the protection unit 130 includes a first voltage dividing resistor R1, a second voltage dividing resistor R2, a bias resistor R3, a triode Q1 and a PMOS transistor P1, where: the first end of the first voltage dividing resistor R1 is connected to the internal system and the voltage output control module 210, the second end of the first voltage dividing resistor R1 is connected to the first end of the second voltage dividing resistor R2 and the base of the triode Q1, the second end of the second voltage dividing resistor R2 is grounded, the emitter of the triode Q1 is grounded, the collector of the triode Q1 is connected to the first end of the bias resistor R3 and the gate of the PMOS transistor P1, the second end of the bias resistor R3 is connected to the source of the PMOS transistor P1 and commonly connected to the second fixed end of the single-pole double-throw switch SW1, and the drain of the PMOS transistor P1 is connected to the first end of the first voltage dividing resistor R1 and commonly connected to the internal system and the voltage output control module 210.

[0044] In the embodiment of the present invention, the PMOS transistor P1 is a three-terminal semiconductor device. Only when the gate voltage is negative can a conductive channel be formed to allow current to flow from the source to the drain. When the gate voltage is low enough to form an inversion layer under the surface of the P-type semiconductor, the channel is formed and current can pass through. The bias resistor R3 is used to set the gate voltage of the PMOS transistor P1 to control the switching state of the PMOS transistor P1. The resistance value of R3 is set according to the actual situation to ensure that under a given voltage source, the gate voltage can be low enough to turn on the PMOS transistor P1. Too large a resistance value may result in an insufficiently low gate voltage, while too small a resistance value may increase unnecessary power consumption.

[0045] When the internal system and the voltage output control module 210 are powered off, the movable end and the second fixed end of the single-pole double-throw switch SW1 are connected. After the charger is connected and divided by the first voltage dividing resistor R1 and the second voltage dividing resistor R2, the triode Q1 is turned on, and the bias resistor R3 turns on the PMOS transistor P1. Then, the battery unit 110 is charged through the second fixed end to the movable end of the single-pole double-throw switch SW1.

[0046] When the internal system and the voltage output control module 210 are powered on, the movable end and the first fixed end of the single-pole double-throw switch SW1 are connected, and the internal system and the voltage output control module 210 are powered by the battery unit 110. The internal system and the voltage output control module 210 can then supply power externally. The internal system and the voltage output control module 210 can output with or without voltage boosting. At this time, the voltage output passes from the positive pole to the second fixed end of the single-pole double-throw switch SW1, which is floating and does not affect the internal system and the voltage output control module 210.

[0047] As another preferred embodiment of the present invention, Figure 5 is the second schematic diagram of the structure of the dual-line charging and power supply management circuit provided by the embodiment of the present invention. As Figure 5 shown, the dual-line charging and power supply management circuit 100 further includes a battery management unit 150, and the battery management unit 150 is connected to the battery unit 110. The battery management unit 150 is used to monitor and manage the state of the battery unit 110 to ensure the safe, stable and efficient operation of the battery unit 110. Specifically, it includes real-time collection of key parameters such as the voltage, current and temperature of the battery unit 110 through devices such as sensors, and based on the collected data, the state of the battery unit 110 is evaluated, including the remaining capacity, health status, fault information, etc. of the battery. The battery management unit 150 also performs safety protection on the battery unit 110. When abnormal conditions such as overcharging, over-discharging and short-circuiting of the battery unit 110 are detected, measures will be immediately taken to cut off the charging and discharging path.

[0048] For the dual-line charging and power supply management circuit provided by the embodiment of the present invention, by adding devices such as diodes, devices similar to wireless signal receivers only need two wires to output externally during operation, and when turned off, these two wires can be cleverly used to charge the device. It can be quickly charged when needed, without adding a dedicated charging interface for the device or disassembling the device for charging, effectively improving work efficiency and significantly reducing production costs.

[0049] Embodiment 2

[0050] Based on the same technical concept, the embodiment of the present invention also provides an electronic device 200, Figure 6 which is a schematic diagram of the structure of an electronic device provided by the present invention. The electronic device 200 includes the dual-line charging and power supply management circuit 100 and the internal system and voltage output control module 210 in the above-mentioned Embodiment 1. The internal system and voltage output control module 210 are respectively connected to the switch unit 120 and the dual-line interface unit 140 of the dual-line charging and power supply management circuit 100. The internal system and voltage output control module 210 is used to control the working state of the electronic device 200 and control whether to output voltage externally.

[0051] Among them, the electronic device 200 includes, but is not limited to, electronic devices such as wireless signal receivers, portable power supplies, industrial sensors, and portable monitors.

[0052] For the electronic device provided by the embodiment of the present utility model, there is no need to add a dedicated charging interface to the device, which can significantly reduce the production cost. By optimizing the connection method of two wires and using waterproof materials, it is easier to achieve the waterproof design of the device and improve its reliability in different environments.

[0053] In summary, for the management circuit and electronic device with dual-line charging and power supply provided by the present utility model, by adding devices such as diodes, devices like wireless signal receivers only need two wires to output power when working, and when turned off, these two wires can be cleverly used to charge the device. It can quickly charge when needed, without adding a dedicated charging interface to the device or disassembling the device for charging, effectively improving the work efficiency and significantly reducing the production cost. At the same time, by optimizing the connection method of two wires and using waterproof materials, it is easier to achieve the waterproof design of the device and improve its reliability in different environments.

[0054] References to "embodiments" in this document mean that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0055] The above-described embodiments merely represent several implementation manners of the present utility model. Their descriptions are relatively specific and detailed, but should not be construed as limiting the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, not to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A dual-line charging and power supply management circuit, characterized in that: The management circuit is applied to electronic equipment, and the management circuit includes a battery unit, a switch unit, a protection unit and a two-wire interface unit, wherein: The battery unit is connected to the first end of the switch unit, and the battery unit is used to supply power to the electronic device; The second end of the switch unit is connected to the internal system and the voltage output control module of the electronic device, the internal system and the voltage output control module are connected to the two-wire interface unit, and the switch unit controls the charging and supplying state of the battery unit; The third end of the switch unit is connected to the protection unit, and the protection unit is connected to the two-wire interface unit. The first interface of the two-wire interface unit is connected to an external electrical device, and the second interface of the two-wire interface unit is connected to a charger. The protection unit is used to control the switch unit to be closed, so that the battery unit does not supply power to the external electrical device and can only be charged through the charger.

2. The dual-line charging and power supply management circuit according to claim 1, characterized in that: The protection unit includes a first diode, an anode of the first diode is connected to the third end of the switch unit, and a cathode of the first diode is connected to the internal system and the voltage output control module.

3. The dual-line charging and power supply management circuit according to claim 2, characterized in that: The protection unit further includes a second diode, an anode of the second diode is connected to a cathode of the first diode, and a cathode of the second diode is connected to the internal system and the voltage output control module.

4. The dual-line charging and power supply management circuit according to claim 3, characterized in that: The first diode and the second diode are both reverse diodes.

5. The dual-line charging and power supply management circuit according to claim 1, characterized in that: The protection unit includes a first voltage-dividing resistor, a second voltage-dividing resistor, a bias resistor, a transistor and a PMOS transistor, wherein: the first end of the first voltage-dividing resistor is connected to an internal system and a voltage output control module, the second end of the first voltage-dividing resistor is connected to the first end of the second voltage-dividing resistor and the base of the transistor, the second end of the second voltage-dividing resistor is grounded, the emitter of the transistor is grounded, the collector of the transistor is connected to the first end of the bias resistor and the gate of the PMOS transistor, the second end of the bias resistor is connected to the source of the PMOS transistor and is jointly connected to the third end of the switch unit, and the drain of the PMOS transistor is connected to the first end of the first voltage-dividing resistor and is jointly connected to the internal system and the voltage output control module.

6. The dual-line charging and power supply management circuit according to any one of claims 1 to 5, characterized in that: The switch unit is a single-pole double-throw switch.

7. The dual-line charging and power supply management circuit according to any one of claims 1 to 5, characterized in that: The battery unit is one or more of a dry cell, a lithium cell, a storage cell and a solar cell.

8. The dual-line charging and power supply management circuit according to any one of claims 1 to 5, characterized in that: The management circuit further comprises a battery management unit connected to the battery unit.

9. An electronic device, characterized in that: The electronic device comprises the dual-wire charging and power supply management circuit as described in any one of claims 1-8.

10. The electronic device according to claim 9, characterized in that: The electronic device also includes an internal system and a voltage output control module, which are respectively connected to the switch unit and the two-wire interface unit of the two-wire charging and power supply management circuit, and are used to control the working state of the electronic device and control whether to output voltage.

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