Portable USB-lithium battery double-source power supply system for thermal infrared imager

Abstract

The utility model relates to the technical field of portable thermal infrared imager power supply, in particular to a portable thermal infrared imager USB-lithium battery double-source power supply system, which comprises a USB power supply and charging unit for realizing power supply through USB connection. The omni-directional power supply and charging unit is used for being connected with the lithium battery modules so as to supply power to the lithium battery or charge the lithium battery and achieve non-polarity limited installation of the lithium battery, and the input end and the output end of the omni-directional power supply and charging unit are connected with the USB power supply and charging unit and the corresponding lithium battery modules. According to the utility model, a series of functions of single USB power supply, USB power supply, lithium battery module omnidirectional charging, lithium battery omnidirectional power supply and the like can be realized, the integration level is high, the circuit occupied board area is reduced by optimizing the circuit design, the non-polarity limitation installation of the battery can be realized by adopting the omnidirectional power supply charging unit, and the cost is low. A user can conveniently and quickly replace the lithium battery in an outdoor environment, and operation steps are simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply for portable infrared thermal imagers, in particular to a USB-lithium battery dual-source power supply system for portable infrared thermal imagers. Background Art

[0002] A portable infrared thermal imager is a device that captures and displays the surface temperature distribution of an object. It generates thermal images by detecting infrared radiation emitted by an object. These images can be used to identify temperature anomalies, diagnose faults, and locate targets. Portable infrared thermal imagers are increasingly being used for outdoor work. In these environments, users typically recharge by simply replacing external batteries, which are convenient to carry. Existing portable infrared thermal imagers typically utilize separate USB charging, USB power supply, and lithium battery circuits. This facilitates maintenance, but also results in a large circuit board footprint, hindering the camera's portability. Furthermore, existing lithium battery circuits typically require strict adherence to designated polarity. However, in outdoor work, the use of standard 18650 lithium batteries, combined with their unique design, makes it difficult for operators to quickly identify the polarity, making reverse connection a common problem. This can lead to malfunctions and a poor user experience. Utility Model Content

[0003] The technical problem to be solved by the present invention is that the existing portable infrared thermal imager circuit design has low integration, the circuit occupies a large board area, which is not conducive to the portable design of the infrared thermal imager, and does not support the polarity-free installation of the battery, which is inconvenient to use and the user experience is poor.

[0004] To solve the above technical problems, the present invention adopts the following technical solution: a portable infrared thermal imager USB-lithium battery dual-source power supply system, including a USB power supply and charging unit for realizing power supply through USB connection, and an omnidirectional power supply and charging unit for connecting a lithium battery module to power or charge the lithium battery and realize polarity-free installation of the lithium battery. The input and output ends of the omnidirectional power supply and charging unit are both connected to the USB power supply and charging unit and the corresponding lithium battery module, the input end of the USB power supply and charging unit is connected to the corresponding USB interface, and the output end of the USB power supply and charging unit is connected to the corresponding internal power supply.

[0005] When the utility model is working, it can realize a series of functions such as single USB power supply, USB power supply and omnidirectional charging of lithium battery module, and omnidirectional power supply of lithium battery. It has high integration and reduces the circuit board area by optimizing the circuit design. At the same time, the omnidirectional power supply and charging unit can realize the polarity-free installation of the battery, which is convenient for users to quickly replace lithium batteries in outdoor environments, simplifies the operation steps, and can improve the user experience.

[0006] Preferably, the omnidirectional power supply and charging unit includes MOS transistor Q1, MOS transistor Q2, MOS transistor Q3, MOS transistor Q4, MOS transistor Q5, MOS transistor Q6, MOS transistor Q7, MOS transistor Q8, bidirectional TVS transistor D1, bidirectional TVS transistor D2, bidirectional TVS transistor D3, bidirectional TVS transistor D4, resistor R1, resistor R2, resistor R3, resistor R4, resistor R5, resistor R6, resistor R7, resistor R8 and resistor R9;

[0007] The source of the MOS transistor Q1 is connected to the USB power supply and charging unit, the gate of the MOS transistor Q1 is connected to the first end of the resistor R8, the second end of the resistor R8 is connected to the source of the MOS transistor Q1 through the bidirectional TVS transistor D3 and the resistor R3, and the drain of the MOS transistor Q1 is connected to the gate of the MOS transistor Q5, the source of the MOS transistor Q6, the source of the MOS transistor Q7, the gate of the MOS transistor Q8, and the first end of the lithium battery module.

[0008] The source of the MOS transistor Q2 is connected to the USB power supply and charging unit, the gate of the MOS transistor Q2 is connected to the first end of the resistor R9, the second end of the resistor R9 is connected to the source of the MOS transistor Q2 through the bidirectional TVS transistor D4 and the resistor R4, and the drain of the MOS transistor Q2 is connected to the gate of the MOS transistor Q6, the gate of the MOS transistor Q7, the source of the MOS transistor Q5, and the second end of the lithium battery module.

[0009] The gate of the MOS transistor Q3 is connected to the drain of the MOS transistor Q7 through the resistor R6. The drain of the MOS transistor Q3 is connected to the second end of the lithium battery module. The source of the MOS transistor Q3 is connected to the gate of the MOS transistor Q3 through the bidirectional TVS transistor D1 and the resistor R1 respectively. The source of the MOS transistor Q3 is grounded. The drain of the MOS transistor Q3 is connected to the drain of the MOS transistor Q1 through the resistor R5.

[0010] The gate of the MOS transistor Q4 is connected to the drain of the MOS transistor Q8 via the resistor R7. The drain of the MOS transistor Q4 is connected to the source of the MOS transistor Q6, the gate of the MOS transistor Q8, the gate of the MOS transistor Q5, the source of the MOS transistor Q7, and the first end of the lithium battery module. The source of the MOS transistor Q4 is connected to the gate of the MOS transistor Q4 via the bidirectional TVS transistor D2 and the resistor R2. The source of the MOS transistor Q4 is grounded.

[0011] Preferably, the MOS tube Q1 and the MOS tube Q3 of the omnidirectional power supply and charging unit are turned on when the first end of the lithium battery module is the positive pole, and the USB power supply and charging unit outputs the charging current to the first end of the lithium battery module through the MOS tube Q1, and the second end of the lithium battery module is grounded through the MOS tube Q3 to form a charging circuit.

[0012] Preferably, the MOS tube Q1 and the MOS tube Q3 of the omnidirectional power supply and charging unit are turned on when the first end of the lithium battery module is the positive electrode, the first end of the lithium battery module outputs the discharge current to the USB power supply and charging unit through the MOS tube Q1, and the second end of the lithium battery module is grounded through the MOS tube Q3 to form a discharge circuit.

[0013] Preferably, the MOS tube Q2 and the MOS tube Q4 of the omnidirectional power supply and charging unit are turned on when the second end of the lithium battery module is the positive pole, and the USB power supply and charging unit outputs the charging current to the second end of the lithium battery module through the MOS tube Q2, and the first end of the lithium battery module is grounded through the MOS tube Q4 to form a charging circuit.

[0014] Preferably, the MOS tube Q2 and the MOS tube Q4 of the omnidirectional power supply and charging unit are turned on when the second end of the lithium battery module is the positive pole, and the second end of the lithium battery module outputs the discharge current to the USB power supply and charging unit through the MOS tube Q2, and the first end of the lithium battery module is grounded through the MOS tube Q4 to form a discharge circuit.

[0015] Preferably, the lithium battery module is provided with an external mounting position for mounting the lithium battery in forward and reverse connection.

[0016] The beneficial technical effects of the utility model include:

[0017] This utility model can realize a series of functions such as single USB power supply, USB power supply and omnidirectional charging of lithium battery module, and omnidirectional power supply of lithium battery. It has high integration and reduces the circuit board area by optimizing circuit design. At the same time, the omnidirectional power supply and charging unit can realize the polarity-free installation of the battery, which is convenient for users to quickly replace lithium batteries in outdoor environments, simplifies the operation steps, and can improve the user experience.

[0018] Other features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings:

[0020] Attachment Figure 1 This is a schematic diagram of the structure of a USB-lithium battery dual-source power supply system for a portable infrared thermal imager;

[0021] Attachment Figure 2 This is the circuit structure diagram of the omnidirectional power supply and charging unit. DETAILED DESCRIPTION

[0022] The following is an explanation and description of the technical solutions of the embodiments of the present invention in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention and are not exhaustive. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0023] In the following description, terms such as "inside", "outside", "up", "down", "left", "right", etc. that indicate directions or positional relationships are only used to facilitate the description of the embodiments and simplify the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0024] Please see the attached Figure 1 This embodiment discloses a USB-lithium battery dual-source power supply system for a portable infrared thermal imager, including a USB power supply and charging unit 1 for realizing power supply through a USB connection, and an omnidirectional power supply and charging unit 2 for connecting a lithium battery module 3 to realize lithium battery power supply or lithium battery charging and realize lithium battery installation without polarity restriction. The system is described in detail below with reference to the accompanying drawings.

[0025] Please see the attached Figure 1 and attached Figure 2 In this embodiment, the input and output ends of the omnidirectional power supply and charging unit 2 are connected to the USB power supply and charging unit 1 and the corresponding lithium battery module 3, the input end of the USB power supply and charging unit 1 is connected to the corresponding USB interface 4, and the output end of the USB power supply and charging unit 1 is connected to the corresponding internal power supply 5.

[0026] When this embodiment is working, it can realize a series of functions such as single USB power supply, USB power supply and simultaneous charging of the lithium battery module 3, and omnidirectional power supply of the lithium battery. It has high integration and reduces the circuit board area by optimizing the circuit design. At the same time, the use of the omnidirectional power supply and charging unit 2 can realize the polarity-free installation of the battery, which is convenient for users to quickly replace the lithium battery in outdoor environments, simplifies the operation steps, and can improve the user experience.

[0027] In a specific implementation, the omnidirectional power supply and charging unit 2 includes a MOS transistor Q1, a MOS transistor Q2, a MOS transistor Q3, a MOS transistor Q4, a MOS transistor Q5, a MOS transistor Q6, a MOS transistor Q7, a MOS transistor Q8, a bidirectional TVS transistor D1, a bidirectional TVS transistor D2, a bidirectional TVS transistor D3, a bidirectional TVS transistor D4, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, and a resistor R9;

[0028] The source of the MOS transistor Q1 is connected to the USB power supply and charging unit 1. The gate of the MOS transistor Q1 is connected to the first end of the resistor R8. The second end of the resistor R8 is connected to the source of the MOS transistor Q1 through the bidirectional TVS transistor D3 and the resistor R3. The drain of the MOS transistor Q1 is connected to the gate of the MOS transistor Q5, the source of the MOS transistor Q6, the source of the MOS transistor Q7, the gate of the MOS transistor Q8, and the first end of the lithium battery module 3.

[0029] The source of the MOS transistor Q2 is connected to the USB power supply and charging unit 1. The gate of the MOS transistor Q2 is connected to the first end of the resistor R9. The second end of the resistor R9 is connected to the source of the MOS transistor Q2 through the bidirectional TVS transistor D4 and the resistor R4. The drain of the MOS transistor Q2 is connected to the gate of the MOS transistor Q6, the gate of the MOS transistor Q7, the source of the MOS transistor Q5, and the second end of the lithium battery module 3.

[0030] The gate of the MOS transistor Q3 is connected to the drain of the MOS transistor Q7 through the resistor R6. The drain of the MOS transistor Q3 is connected to the second end of the lithium battery module 3. The source of the MOS transistor Q3 is connected to the gate of the MOS transistor Q3 through the bidirectional TVS transistor D1 and the resistor R1. The source of the MOS transistor Q3 is grounded. The drain of the MOS transistor Q3 is connected to the drain of the MOS transistor Q1 through the resistor R5.

[0031] The gate of the MOS transistor Q4 is connected to the drain of the MOS transistor Q8 via the resistor R7. The drain of the MOS transistor Q4 is connected to the source of the MOS transistor Q6, the gate of the MOS transistor Q8, the gate of the MOS transistor Q5, the source of the MOS transistor Q7, and the first end of the lithium battery module 3. The source of the MOS transistor Q4 is connected to the gate of the MOS transistor Q4 via the bidirectional TVS transistor D2 and the resistor R2. The source of the MOS transistor Q4 is grounded.

[0032] During operation of this embodiment, when the lithium battery installed in the lithium battery module 3 is positively connected and the USB power supply and charging unit 1 is connected to a power source to charge the lithium battery module 3, the MOS transistors Q1 and Q3 of the omnidirectional power supply and charging unit 2 are turned on when the first end of the lithium battery module 3 is at the positive pole. The USB power supply and charging unit 1 outputs a charging current to the first end of the lithium battery module 3 through the MOS transistor Q1, and the second end of the lithium battery module 3 is grounded through the MOS transistor Q3 to form a charging circuit.

[0033] When the lithium battery installed in the lithium battery module 3 is positively connected and the USB power supply and charging unit 1 is not connected to a power source and is powered by the lithium battery module 3, the MOS transistors Q1 and Q3 of the omnidirectional power supply and charging unit 2 are turned on when the first end of the lithium battery module 3 is at the positive pole. The first end of the lithium battery module 3 outputs a discharge current to the USB power supply and charging unit 1 through the MOS transistor Q1, and the second end of the lithium battery module 3 is grounded through the MOS transistor Q3 to form a discharge circuit;

[0034] When the lithium battery installed in the lithium battery module 3 is reversely connected and the USB power supply and charging unit 1 is connected to a power source to charge the lithium battery module 3, the MOS transistors Q2 and Q4 of the omnidirectional power supply and charging unit 2 are turned on when the second end of the lithium battery module 3 is at the positive pole. The USB power supply and charging unit 1 outputs a charging current to the second end of the lithium battery module 3 through the MOS transistor Q2, and the first end of the lithium battery module 3 is grounded through the MOS transistor Q4 to form a charging circuit;

[0035] When the lithium battery installed in the lithium battery module 3 is reversely connected and the USB power supply and charging unit 1 is not connected to a power source and is powered by the lithium battery module 3, the MOS transistors Q2 and Q4 of the omnidirectional power supply and charging unit 2 are turned on when the second end of the lithium battery module 3 is at the positive pole. The second end of the lithium battery module 3 outputs a discharge current to the USB power supply and charging unit 1 through the MOS transistor Q2, and the first end of the lithium battery module 3 is grounded through the MOS transistor Q4 to form a discharge circuit.

[0036] Preferably, the lithium battery module 3 is provided with an external mounting position for installing the lithium battery in both forward and reverse directions. In specific implementation, the lithium battery can be installed using a battery compartment with an elastic component. The lithium battery can be replaced without determining the polarity direction of the lithium battery, which simplifies the operation steps and provides a good user experience. Of course, any other battery installation mechanism can also be used.

[0037] The beneficial technical effects of this embodiment include: the utility model can realize a series of functions such as single USB power supply, USB power supply and simultaneous omnidirectional charging of lithium battery modules, and omnidirectional power supply of lithium batteries. It has high integration and reduces the circuit board area occupied by the circuit by optimizing the circuit design. At the same time, the use of an omnidirectional power supply and charging unit can realize the polarity-free installation of the battery, which is convenient for users to quickly replace lithium batteries in outdoor environments, simplifies the operation steps, and can improve the user experience.

[0038] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art will understand that the present invention includes, but is not limited to, the contents described in the drawings and the above specific embodiments. Any modifications that do not deviate from the functional and structural principles of the present invention are intended to be included within the scope of the claims.

Claims

1. A portable infrared thermal imager USB-lithium battery dual-source power supply system, characterized by: The invention comprises a USB power supply and charging unit (1) for realizing power supply through USB connection, and an omnidirectional power supply and charging unit (2) for connecting a lithium battery module (3) to realize lithium battery power supply or lithium battery charging and realize non-polarity restriction installation of the lithium battery, wherein the input end and the output end of the omnidirectional power supply and charging unit (2) are both connected to the USB power supply and charging unit (1) and the corresponding lithium battery module (3), the input end of the USB power supply and charging unit (1) is connected to the corresponding USB interface (4), and the output end of the USB power supply and charging unit (1) is connected to the corresponding internal power supply (5).

2. The portable infrared thermal imager USB-lithium battery dual-source power supply system according to claim 1, characterized in that: The omnidirectional power supply and charging unit (2) comprises a MOS transistor Q1, a MOS transistor Q2, a MOS transistor Q3, a MOS transistor Q4, a MOS transistor Q5, a MOS transistor Q6, a MOS transistor Q7, a MOS transistor Q8, a bidirectional TVS transistor D1, a bidirectional TVS transistor D2, a bidirectional TVS transistor D3, a bidirectional TVS transistor D4, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8 and a resistor R9; The source of the MOS transistor Q1 is connected to the USB power supply and charging unit (1), the gate of the MOS transistor Q1 is connected to the first end of the resistor R8, the second end of the resistor R8 is connected to the source of the MOS transistor Q1 through the bidirectional TVS transistor D3 and the resistor R3, and the drain of the MOS transistor Q1 is connected to the gate of the MOS transistor Q5, the source of the MOS transistor Q6, the source of the MOS transistor Q7, the gate of the MOS transistor Q8, and the first end of the lithium battery module (3); The source of the MOS transistor Q2 is connected to the USB power supply and charging unit (1), the gate of the MOS transistor Q2 is connected to the first end of the resistor R9, the second end of the resistor R9 is connected to the source of the MOS transistor Q2 via the bidirectional TVS transistor D4 and the resistor R4, and the drain of the MOS transistor Q2 is connected to the gate of the MOS transistor Q6, the gate of the MOS transistor Q7, the source of the MOS transistor Q5, and the second end of the lithium battery module (3). The gate of the MOS transistor Q3 is connected to the drain of the MOS transistor Q7 via a resistor R6, the drain of the MOS transistor Q3 is connected to the second end of the lithium battery module (3), the source of the MOS transistor Q3 is connected to the gate of the MOS transistor Q3 via a bidirectional TVS transistor D1 and a resistor R1, the source of the MOS transistor Q3 is grounded, and the drain of the MOS transistor Q3 is connected to the drain of the MOS transistor Q1 via a resistor R5; The gate of the MOS transistor Q4 is connected to the drain of the MOS transistor Q8 via a resistor R7; the drain of the MOS transistor Q4 is connected to the source of the MOS transistor Q6, the gate of the MOS transistor Q8, the gate of the MOS transistor Q5, the source of the MOS transistor Q7, and the first end of the lithium battery module (3); the source of the MOS transistor Q4 is connected to the gate of the MOS transistor Q4 via a bidirectional TVS transistor D2 and a resistor R2; and the source of the MOS transistor Q4 is grounded.

3. The portable infrared thermal imager USB-lithium battery dual-source power supply system according to claim 2, characterized in that: The MOS tube Q1 and the MOS tube Q3 of the omnidirectional power supply and charging unit (2) are turned on when the first end of the lithium battery module (3) is the positive electrode, the USB power supply and charging unit (1) outputs the charging current to the first end of the lithium battery module (3) through the MOS tube Q1, and the second end of the lithium battery module (3) is grounded through the MOS tube Q3 to form a charging circuit.

4. The portable infrared thermal imager USB-lithium battery dual-source power supply system according to claim 2, characterized in that: The MOS tube Q1 and the MOS tube Q3 of the omnidirectional power supply and charging unit (2) are turned on when the first end of the lithium battery module (3) is the positive electrode, the first end of the lithium battery module (3) outputs a discharge current to the USB power supply and charging unit (1) through the MOS tube Q1, and the second end of the lithium battery module (3) is grounded through the MOS tube Q3 to form a discharge circuit.

5. The portable infrared thermal imager USB-lithium battery dual-source power supply system according to claim 2, characterized in that: The MOS tube Q2 and the MOS tube Q4 of the omnidirectional power supply and charging unit (2) are turned on when the second end of the lithium battery module (3) is at the positive pole, the USB power supply and charging unit (1) outputs the charging current to the second end of the lithium battery module (3) through the MOS tube Q2, and the first end of the lithium battery module (3) is grounded through the MOS tube Q4 to form a charging circuit.

6. The portable infrared thermal imager USB-lithium battery dual-source power supply system according to claim 2, characterized in that: The MOS tube Q2 and the MOS tube Q4 of the omnidirectional power supply and charging unit (2) are turned on when the second end of the lithium battery module (3) is the positive electrode, the second end of the lithium battery module (3) outputs a discharge current to the USB power supply and charging unit (1) through the MOS tube Q2, and the first end of the lithium battery module (3) is grounded through the MOS tube Q4 to form a discharge circuit.

7. The portable infrared thermal imager USB-lithium battery dual-source power supply system according to claim 1, characterized in that: The lithium battery module (3) is provided with an external mounting position for mounting the lithium battery in both forward and reverse connection.

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