Low-power-consumption electricity protection circuit based on lithium battery intelligent mine cap

Abstract

The invention relates to the technical field of lithium batteries, and discloses a low-power-consumption electricity protection circuit based on a lithium battery intelligent mine cap. The circuit comprises a camera auxiliary board module, a branch signal chip, a camera main control module, a USB to serial port chip, a sensor module and a power supply module. The camera auxiliary board module is connected with the branch signal chip, the branch signal chip is respectively connected with the camera main control module and the USB to serial port chip, the USB to serial port chip is connected with and controls the power supply module, the power supply module is connected with and supplies power to the camera main control module, and the camera main control module is connected with the sensor module. The branch signal chip divides the USB signal from the camera auxiliary board module into two paths, the first path communicates with the camera main control module, and the second path controls the GPIO of the USB-to-serial port chip. Power supply of the camera main control module is cut off through the first USB signal, unnecessary power consumption of the intelligent mine cap is reduced, and the purposes of controlling power supply of the mine cap and keeping power with low power consumption are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of lithium batteries, and in particular to a low-power consumption power conservation circuit based on a lithium battery intelligent mining cap. Background Art

[0002] A mining cap, also known as a safety cap, is a shallow dome cap made of steel or similar materials that is worn by miners or underground engineering personnel to protect their heads. With the development of smart electronic products, lithium battery smart mining caps that can be connected to control systems have emerged. A mining cap cable is required to connect a lithium battery smart device to a mining cap. The mining cap cable is a wire specially designed for coal miners to connect the safety cap light and the battery. This cable is used underground in coal mines and has flame retardant and high temperature resistance properties. The mining cap cable is usually manufactured in accordance with the MT / T818.10-1999 standard.

[0003] In the lithium battery smart mining cap, since a dedicated mining cap line is required, and the smart mining cap is charged and discharged by the same mining cap line, it is impossible to reduce the unnecessary power consumption of the mining cap by cutting off the power supply of this line. Therefore, the power consumption of the lithium battery smart mining cap is large and it is impossible to effectively maintain power. Summary of the invention

[0004] The technical problem to be solved by the present application is to provide a low-power consumption power preservation circuit for a lithium battery intelligent mining cap, so as to achieve the purpose of controlling the power supply of the mining cap and maintaining power with low power consumption.

[0005] In order to solve the above problems, the present application provides a low-power power preservation circuit based on a lithium battery smart mining cap, including a camera sub-board module, a signal distribution chip, a camera main control module, a USB to serial port chip, a sensor module and a power supply module; the camera sub-board module is connected to the signal distribution chip, the signal distribution chip is respectively connected to the camera main control module and the USB to serial port chip, the USB to serial port chip is connected to and controls the power supply module, the power supply module is connected to and supplies power to the camera main control module, and the camera main control module is connected to the sensor module.

[0006] Preferably, the camera sub-board module includes a socket, a first pin of the socket is connected to a power supply, and a second pin and a third pin of the socket are respectively connected to the signal distribution chip.

[0007] Preferably, the first pin and the second pin of the sub-signal chip are respectively connected to the camera sub-board module, the third pin and the fourth pin of the sub-signal chip are respectively connected to the camera main control module, the fifteenth pin and the sixteenth pin of the sub-signal chip are respectively connected to the USB to serial port chip, and the twenty-first pin of the sub-signal chip is connected to the power supply voltage.

[0008] Preferably, the circuit also includes a first reverse module, the third pin and the fourth pin of the USB-to-serial port chip are respectively connected to the signal distribution chip, the thirteenth pin of the USB-to-serial port chip is connected to the first reverse module, and the first reverse module is connected to a power supply.

[0009] Preferably, the first reverse module includes a sixteenth transistor, the base of the sixteenth transistor is connected to the thirteenth pin of the USB-to-serial port chip, the collector of the sixteenth transistor is connected to the power supply, and the emitter of the sixteenth transistor is grounded.

[0010] Preferably, the first reverse module further includes a connector, and two ends of the connector are respectively connected to the base and the emitter of the sixteenth transistor.

[0011] Preferably, the circuit further comprises a second reverse module, the fourteenth pin of the USB-to-serial port chip is connected to the second reverse module, and the second reverse module is connected to the power supply voltage.

[0012] Preferably, the second reverse module comprises a fourth transistor, the base of the fourth transistor is connected to the fourteenth pin of the USB-to-serial port chip, the collector of the fourth transistor is connected to the power supply voltage, and the emitter of the fourth transistor is grounded.

[0013] Preferably, the power supply module is connected to the power supply voltage, the power supply module is connected to the signal transmission interface of the first reverse module, and the power supply module is connected to the camera main control module.

[0014] Preferably, the power supply module includes three power supply circuits, each of which is respectively connected to the power supply voltage, each of which is respectively connected to the signal transmission interface of the first reverse module, and each of which is respectively connected to the camera main control module.

[0015] Compared with the prior art, the present invention has at least one of the following beneficial technical effects: Compared with the prior art, the embodiment of the present application adds a signal splitting chip and a USB to serial port chip. The signal splitting chip splits the USB signal from the camera sub-board module into two paths, wherein the first USB signal communicates with the camera main control module to control the sensor module. On the other hand, the second USB signal controls the switch of the GPIO (GPIO is a general-purpose input and output interface, mainly used to connect microcontrollers, embedded systems or other electronic devices to interact with the outside world) of the USB to serial port chip, thereby controlling the operation of the power supply module and supplying power to the camera main control module. Therefore, the power supply of the camera main control module can be disconnected through the first USB signal, reducing unnecessary power consumption of the smart mining cap, so as to achieve the purpose of controlling the power supply of the mining cap and maintaining power with low power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a circuit framework diagram of a low-power power conservation circuit based on a lithium battery intelligent mining cap in an embodiment of the present application; Figure 2 This is a schematic diagram of the circuit structure of the camera sub-board module in the embodiment of the present application; Figure 3 This is a schematic diagram of the circuit structure of the signal distribution chip in the embodiment of the present application; Figure 4 This is a schematic diagram of the circuit structure of the camera main control module in the embodiment of the present application; Figure 5 This is a schematic diagram of the circuit structure of the USB-to-serial port chip in the embodiment of the present application; Figure 6 Schematic diagram of the circuit structure of the first reverse module in the embodiment of the present application; Figure 7 Schematic diagram of the circuit structure of the second reverse module in the embodiment of the present application; Figure 8 This is a schematic diagram of the circuit structure of the power supply module in an embodiment of the present application; Explanation of the accompanying drawings: J1, socket; J47, connector; U12, signal distribution chip; U21, USB to serial port chip; Q16, sixteenth transistor; Q4, fourth transistor; IO1, signal transmission interface; VCC-HUB, power supply voltage; VBUS, power supply; C304, three hundred and fourth capacitor; C91, ninety-first capacitor; C89, eighty-ninth capacitor; D7, seventh diode; D8, eighth diode; D9, ninth diode; R198, one hundred and ninety-eighth resistor; R199, one hundred and ninety-ninth resistor; R181, one hundred and eighty-first resistor; R182, one hundred and eighty-second resistor; R183, one hundred and eighty-third resistor; C125, one hundred and twenty-fifth capacitor; U9, single-chip microcomputer main control chip. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0019] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0020] It should also be understood that the terms used in this application specification are only for the purpose of describing specific embodiments and are not intended to limit the application. As used in this application specification and the appended claims, the singular forms "a", "an" and "the" are intended to include plural forms unless the context clearly indicates otherwise.

[0021] It should be further understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0022] Please refer to Figure 1 The embodiment of the present application provides a low-power power conservation circuit based on a lithium battery smart mining cap, which is applied to the camera of the lithium battery smart mining cap. Specifically, the circuit includes a camera sub-board module, a signal distribution chip U12, a camera main control module, a USB to serial port chip U21, a sensor module and a power supply module.

[0023] Among them, the USB interface of the camera sub-board module is connected to the USB interface of the signal distribution chip U12 to transmit the USB signal. The other USB interface of the signal distribution chip U12 is respectively connected to the USB interface of the camera main control module and the USB interface of the USB to serial port chip U21, thereby dividing the USB signal into two paths. In one path, the USB to serial port chip U21 is connected to and controls the power supply module, the power supply module is connected to the camera main control module, and the power supply module supplies power to the camera main control module; in the other path, the camera main control module is connected to the sensor module.

[0024] Here, compared with the prior art, the embodiment of the present application adds a signal splitting chip U12 and a USB to serial port chip U21. The signal splitting chip U12 splits the USB signal from the camera sub-board module into two paths, wherein the first USB signal communicates with the camera main control module to control the sensor module. On the other hand, the second USB signal controls the switch of the GPIO (GPIO is a general-purpose input and output interface, mainly used to connect microcontrollers, embedded systems or other electronic devices to interact with the outside world) of the USB to serial port chip U21, thereby controlling the operation of the power supply module and supplying power to the camera main control module. Therefore, the power supply of the camera main control module can be disconnected through the first USB signal, reducing unnecessary power consumption of the smart mining cap, so as to achieve the purpose of controlling the power supply of the mining cap and maintaining power with low power consumption.

[0025] Please refer to Figure 2 In a specific embodiment, the camera sub-board module includes a socket J1. The first pin of the socket J1 is connected to the power supply VBUS through a mining cap line, and the second pin and the third pin of the socket J1 are respectively connected to the USB interface of the signal chip U12 through the USB interface for communication.

[0026] Furthermore, the camera sub-board module also includes a plurality of filtering and voltage-stabilizing capacitors. In the present embodiment, the filtering and voltage-stabilizing capacitors are set to three, namely, the 304th capacitor C304, the 91st capacitor C91 and the 89th capacitor C89. Among them, the positive electrode of the 304th capacitor C304 is connected to the first pin of the socket J1, and the negative electrode is grounded; one end of the 91st capacitor C91 and the 89th capacitor C89 are respectively connected to the first pin of the socket J1, and the other ends of the 91st capacitor C91 and the 89th capacitor C89 are respectively grounded.

[0027] The camera sub-board module also includes several diodes for anti-static. In this embodiment, three diodes are provided, namely, the seventh diode D7, the eighth diode D8 and the ninth diode D9. The two ends of the seventh diode D7 are respectively connected to the third pin of the socket J1 and the ground, the two ends of the eighth diode D8 are respectively connected to the second pin of the socket J1 and the ground, and the two ends of the ninth diode D9 are respectively connected to the first pin of the socket J1 and the ground.

[0028] Please refer to Figure 3 In a specific embodiment, the first pin and the second pin of the signal chip U12 are respectively connected to the second pin and the third pin of the socket J1 in the camera sub-board module; the third pin and the fourth pin of the signal chip U12 are respectively connected to the camera main control module, the fifteenth pin and the sixteenth pin of the signal chip U12 are respectively connected to the USB to serial port chip U21, and the twenty-first pin of the signal chip U12 is connected to the power supply voltage VCC-HUB.

[0029] Please refer to Figures 5 to 7 In a specific embodiment, the circuit further includes a first reverse module. The third pin and the fourth pin of the USB-to-serial port chip U21 are respectively connected to the fifteenth pin and the sixteenth pin of the signal distribution chip U12, the thirteenth pin of the USB-to-serial port chip U21 is connected to the first reverse module, and the first reverse module is connected to the power supply VBUS.

[0030] Specifically, the first reverse module includes a sixteenth transistor Q16 and a connector J47. The base of the sixteenth transistor Q16 is connected to the thirteenth pin of the USB-to-serial port chip U21, the collector of the sixteenth transistor Q16 is connected to the power supply VBUS, the emitter of the sixteenth transistor Q16 is grounded, and the two ends of the connector J47 are respectively connected to the base and emitter of the sixteenth transistor Q16. In this embodiment, the connector J47 has a column and two rows of pins, which can be used to transmit signals, especially when multiple rows of pins are required, more signal channels can be provided.

[0031] Furthermore, the first reverse module also includes a 198th resistor R198 and a 199th resistor R199, which are used for series current limiting. The two ends of the 198th resistor R198 are respectively connected to the 13th pin of the USB-to-serial port chip U21 and the base of the 16th transistor Q16, and the two ends of the 199th resistor R199 are respectively connected to the power supply VBUS and the collector of the 16th transistor Q16.

[0032] In a specific embodiment, the circuit also includes a second reverse module. The fourteenth pin of the USB-to-serial port chip U21 is connected to the second reverse module, and the second reverse module is connected to the power supply voltage VCC-HUB. The second reverse module includes a fourth transistor Q4, the base of the fourth transistor Q4 is connected to the fourteenth pin of the USB-to-serial port chip U21, the collector of the fourth transistor Q4 is connected to the power supply voltage VCC-HUB, and the emitter of the fourth transistor Q4 is grounded. Here, the input signal and the output signal of the first reverse module and the second reverse module differ in phase by 180 degrees, which can be used to achieve a specific signal processing effect.

[0033] Furthermore, the second reverse module also includes a 181st resistor R181, a 182nd resistor R182, a 183rd resistor R183 and a 125th capacitor C125. In this regard, the 181st resistor R181, the 182nd resistor R182 and the 183rd resistor R183 also function as series current limiting, and the 125th capacitor C125 functions as filtering and voltage stabilization.

[0034] The two ends of the 181st resistor R181 are respectively connected to the power supply voltage VCC-HUB and the collector of the fourth transistor Q4, the two ends of the 182nd resistor R182 are respectively connected to the 14th pin of the USB to serial port chip U21 and the base of the fourth transistor Q4, and the two ends of the 183rd resistor R183 are respectively connected to the 14th pin of the USB to serial port chip U21 and the emitter of the fourth transistor Q4. The two ends of the 125th capacitor C125 are respectively connected to the 181st resistor R181 and the ground.

[0035] Please refer to Figures 4 to 8 In a specific embodiment, the power supply module is connected to the power supply voltage VCC-HUB, the power supply module is connected to the signal transmission interface IO1 of the first reverse module, and the power supply module is connected to the camera main control module, so that the power supply module can supply power to the camera main control module.

[0036] In a specific embodiment, the camera main control module includes a single-chip main control chip U9, and the 14th pin, the 61st pin and the 63rd pin of the single-chip main control chip U9 are respectively connected to a magnetic bead (i.e., FB1, FB4 and FB6). Here, the function of the magnetic bead is to suppress high-frequency noise and spike interference, absorb electrostatic pulses and improve circuit performance.

[0037] In a specific embodiment, the power supply module includes three power supply circuits, each of which is connected to the power supply voltage VCC-HUB, each of which is connected to the signal transmission interface IO1 of the first reverse module, and each of which is connected to the camera main control module, so that the camera main control module is powered by each power supply circuit. In other embodiments, the power supply module may also include two, four or five power supply circuits. In this embodiment, the three power supply circuits output the 4V power supply VBUS of the socket J1 as 3.3V, 1.8V, and 0.9V voltages respectively, so that different chip modules can reach their normal operating voltages.

[0038] In the circuit diagram of the existing intelligent mining cap, the charger is charged through the light source board of the mining cap, and the lithium battery power board of the host is charged through one of the VCC lines of the mining cap, and this VCC line is also the power supply line of the camera sub-board. Therefore, when the main board is turned off, the lithium battery power board will still supply power to the camera sub-board through the VCC line.

[0039] This application adds a signal distribution chip U12 and a USB to serial port chip U21, and controls the three power supply circuits of the power supply module through the sixteenth transistor Q16 of the first reverse module, so that the camera main control module can be powered by the power supply module. When the main board is turned off or the camera sub-board is not in use, the camera sub-board module is disconnected through the USB signal to supply power to the camera main control module. Regardless of whether the main board is turned on or off, the camera sub-board module can be in a turned-off state to achieve the purpose of controlling the power supply of the intelligent mining cap and low power consumption.

[0040] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A low-power consumption power-saving circuit based on a lithium battery intelligent mining cap, characterized in that: Including camera sub-board module, signal distribution chip, camera main control module, USB to serial port chip, sensor module and power supply module; The camera sub-board module is connected to the signal distribution chip, the signal distribution chip is respectively connected to the camera main control module and the USB to serial port chip, the USB to serial port chip is connected to and controls the power supply module, the power supply module is connected to and supplies power to the camera main control module, and the camera main control module is connected to the sensor module.

2. According to claim 1, a low-power consumption power-saving circuit based on a lithium battery intelligent mining cap is characterized in that: The camera sub-board module includes a socket, a first pin of the socket is connected to a power supply, and a second pin and a third pin of the socket are respectively connected to the signal distribution chip.

3. A low-power consumption power-saving circuit based on a lithium battery intelligent mining cap according to claim 1, characterized in that: The first pin and the second pin of the sub-signal chip are respectively connected to the camera sub-board module, the third pin and the fourth pin of the sub-signal chip are respectively connected to the camera main control module, the fifteenth pin and the sixteenth pin of the sub-signal chip are respectively connected to the USB to serial port chip, and the twenty-first pin of the sub-signal chip is connected to the power supply voltage.

4. A low-power consumption power-saving circuit based on a lithium battery intelligent mining cap according to claim 1, characterized in that: The circuit also includes a first reverse module, the third pin and the fourth pin of the USB to serial port chip are respectively connected to the signal distribution chip, the thirteenth pin of the USB to serial port chip is connected to the first reverse module, and the first reverse module is connected to a power supply.

5. A low-power consumption power-saving circuit based on a lithium battery intelligent mining cap according to claim 4, characterized in that: The first reverse module includes a sixteenth transistor, the base of the sixteenth transistor is connected to the thirteenth pin of the USB-to-serial port chip, the collector of the sixteenth transistor is connected to the power supply, and the emitter of the sixteenth transistor is grounded.

6. A low-power consumption power-saving circuit based on a lithium battery intelligent mining cap according to claim 5, characterized in that: The first reverse module also includes a connector, and two ends of the connector are respectively connected to the base and the emitter of the sixteenth transistor.

7. A low-power consumption power-saving circuit based on a lithium battery intelligent mining cap according to claim 1, characterized in that: The circuit also includes a second reverse module, the fourteenth pin of the USB-to-serial port chip is connected to the second reverse module, and the second reverse module is connected to the power supply voltage.

8. A low-power consumption power-saving circuit based on a lithium battery intelligent mining cap according to claim 7, characterized in that: The second reverse module includes a fourth transistor, the base of the fourth transistor is connected to the fourteenth pin of the USB-to-serial port chip, the collector of the fourth transistor is connected to the power supply voltage, and the emitter of the fourth transistor is grounded.

9. A low-power consumption power-saving circuit based on a lithium battery intelligent mining cap according to claim 4, characterized in that: The power supply module is connected to the power supply voltage, the power supply module is connected to the signal transmission interface of the first reverse module, and the power supply module is connected to the camera main control module.

10. A low-power consumption power-saving circuit based on a lithium battery intelligent mining cap according to claim 9, characterized in that: The power supply module includes three power supply circuits, each of which is connected to the power supply voltage, each of which is connected to the signal transmission interface of the first reverse module, and each of which is connected to the camera main control module.

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