A dual-power intelligent offline dual-charging structure for hearing aids

Abstract

The present invention discloses a dual-power intelligent offline dual-charging structure for hearing aids, belonging to the technical field of hearing aid power supplies. The structure includes a charging box, which is provided with a power interface, a power battery slot, and a charging battery slot. A backup button battery is detachably installed in the charging battery slot. A circuit board is installed inside the charging box. The power interface and the power battery slot both charge the backup button battery placed in the charging battery slot through the circuit board. A backup charge management circuit is connected between the power interface and the charging battery slot. The power interface charges the battery installed in the charging battery slot through the backup charge circuit. The present invention has the ability to simultaneously use offline charging and online charging functions to charge nickel-metal hydride button batteries for hearing aids. At the same time, when the power battery for offline charging is low on power, the power battery can be charged through the online charging function, greatly improving the convenience of use and reducing resource waste.

Description

Technical Field

[0001] The present invention relates to the technical field of hearing aid power supplies, and in particular to a dual-power intelligent offline dual-charging structure for hearing aids. Background Art

[0002] A hearing aid is an instrument that helps improve hearing. China has more than 1.5 million new hearing aid users each year, and the number of new users worldwide is over 15 million, representing a huge user market. Modern hearing aids are becoming increasingly smaller and more miniaturized. At the same time, as an important hearing aid device, hearing aids are used frequently and for a long time, and hearing aid batteries require long-term continuous discharge. In order to match the size and discharge characteristics of hearing aids, hearing aid batteries must meet the requirements of smaller size and higher capacity. In the prior art, hearing aid batteries are usually zinc-air batteries, which are disposable consumables and need to be frequently replaced during the daily and long-term use of hearing aids.

[0003] The existing technology has the following problems: a hearing aid user using A10 specification batteries consumes 52 A10 batteries throughout the year; a hearing aid user using A312 specification batteries consumes 36 A312 batteries throughout the year. The total number of button batteries consumed each year is very considerable, causing environmental damage and waste of resources. This problem needs to be solved urgently. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the purpose of the present invention is to provide a dual-power intelligent offline dual-charging structure for hearing aids, which can simultaneously use offline charging function and online charging function to charge the nickel-metal hydride button battery for hearing aids. At the same time, when the power battery for offline charging is insufficient, the power battery can be charged through the online charging function, which greatly improves the convenience of use and reduces resource waste.

[0005] A dual-power intelligent offline dual-charging structure for hearing aids includes a charging box with a power interface, a power battery slot, and a charging battery slot. A backup button battery is detachably installed in the charging battery slot. There are two charging battery slots. A circuit board is installed inside the charging box. The power interface and the power battery slot both charge the backup button battery placed in the charging battery slot through the circuit board.

[0006] A backup charging management circuit is connected between the power interface and the rechargeable battery slot. The backup charging management circuit is connected to the circuit board. The power interface charges the battery installed in the rechargeable battery slot through the backup charging circuit.

[0007] The present invention is further configured as follows: the backup charge management circuit includes a backup charge management chip and a transistor VT1, the backup charge management chip is a DS2711 chip, the power interface is a type-c interface, the emitter of the transistor VT1 of interface No. 1 of the power interface is connected to the CC1 interface of the backup charge management chip through the base of the transistor VT1, the collector of the transistor VT1 is connected to the positive pole of the power battery slot, and the No. 2 interface of the power interface is connected to the negative pole of the power battery slot.

[0008] The present invention is further configured as follows: the backup charge management circuit also includes a backup charge sampling circuit, a backup charge and discharge circuit, and a discharge control circuit; the circuit board is connected to a main control microcontroller, the main control microcontroller is an STC15W401AS microcontroller; the backup charge sampling circuit collects the voltage at both ends of the power battery slot and transmits it to the main control microcontroller; the backup charge sampling circuit includes R14 and RP1; the R14 and RP1 are connected in series and then in parallel at both ends of the charging battery slot; the middle pin of the RP1 is connected to the P1.3 interface of the main control microcontroller.

[0009] The present invention is further configured as follows: the standby charge and discharge circuit includes R12 and VT2, the discharge control circuit includes an optocoupler IC2, the light-emitting diode of the optocoupler IC2 is connected to the P3.2 interface of the main control microcontroller, the phototransistor of the optocoupler IC2 is connected to the emitter of VT1, the R12 is connected to the collector of VT2, the emitter of VT2 is connected to the negative electrode of the power battery slot, the base of VT2 is connected to R13, and the R13 is connected to P1.4 of the main control microcontroller.

[0010] The present invention is further configured as follows: interface No. 1 of the power interface is connected to an indicator light, and the indicator light is connected to the LED1 interface of the backup charge management chip.

[0011] The present invention is further configured as follows: a main charging management chip is connected to the circuit board, the main charging management chip is a DS2711 chip, the No. 1 interface of the power interface and the positive pole of the power battery slot are connected to the CC1 interface and CC2 interface of the main charging management chip through the emitter and base of the transistor VT3 and the transistor VT4, and the collectors of the transistor VT3 and the transistor VT4 are respectively connected to the positive poles of the two charging battery slots.

[0012] The present invention is further configured as follows: the charging box includes a box body and a protective cover snapped onto the box body, the indicator light and the power interface are both arranged on the side wall of the box body, and the two charging battery slots and the power battery slot are both opened on the top wall of the box body.

[0013] The present invention is further configured as follows: an elastic buckle is fixedly connected to the protective cover, and a cleaning brush is embedded in the elastic buckle.

[0014] The present invention is further configured as follows: the cleaning brush includes a rod body, five bundles of bristles are connected to the rod body, one end of the rod body is connected to a magnet, and the other end of the rod body is connected to a steel needle.

[0015] The present invention is further configured such that: the protective cover is composed of a transparent plate.

[0016] When using the charging case to charge the backup battery, place the backup battery in the rechargeable battery slot. You can then connect the backup battery to a USB power source using the Type-C port of the power connector or install a NiMH battery in the battery slot. The main charging management chip then charges both backup batteries. When the voltage of the NiMH battery in the battery slot falls below 0.9V when the Type-C port is connected to the power connector, the main charging management chip will charge the battery slot. When the voltage is below 0.9V and below 1.3V, the backup charge and discharge circuits will conduct and discharge, while the discharge control circuit will cut off the charging power and maintain the discharge state, effectively preventing the memory effect caused by overcharging of the battery.

[0017] In summary, the present invention has the following beneficial effects:

[0018] 1. Through the power interface, power battery slot and rechargeable battery slot connected to the circuit board, the backup battery can be charged both online and offline;

[0019] 2. Through the power interface and rechargeable battery slot connected by the backup charge management circuit, when the battery in the rechargeable battery slot is exhausted, the power interface is connected to the power source to charge the power battery;

[0020] 3. Through the setting of the backup charge sampling circuit, the backup charge and discharge circuit and the discharge control circuit, the voltage of the power battery slot is monitored to effectively avoid battery damage caused by overcharging. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram showing the structure of the interior of the box body in the present invention;

[0023] Figure 3 It is a circuit diagram of the present invention.

[0024] In the figure, 1. Charging box; 11. Box body; 111. Indicator light; 12. Protective cover; 121. Elastic buckle; 13. Power interface; 14. Power battery slot; 15. Charging battery slot; 16. Circuit board; 2. Backup charge management circuit; 3. Backup charge sampling circuit; 4. Backup charge and discharge circuit; 5. Discharge control circuit; 51. Optocoupler IC2; 52. VT1; 6. Main charge management chip; 7. Backup charge management chip; 8. Main control microcontroller; 9. Cleaning brush; 91. Rod body; 92. Brush bristles; 93. Magnet; 94. Steel needle. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with the accompanying drawings. Those skilled in the art will readily appreciate the other advantages and benefits of the present invention from the disclosure herein. Terms such as "upper," "lower," "left," "right," and "center" are used herein for clarity and are not intended to limit the scope of the present invention. Any changes or adjustments to these terms, without materially altering the technical content, are considered within the scope of the present invention.

[0026] Example:

[0027] like Figure 1 and Figure 2 As shown, a dual-power intelligent offline dual-charging structure for hearing aids designed by the present invention includes a charging box 1. The charging box 1 includes a box body 11 and a protective cover 12 that is snapped on the box body 11. The protective cover 12 is snapped on the box body 11 and hinged to the box body 11. The protective cover 12 is made of a transparent plate. A power battery slot 14 and two charging battery slots 15 are provided on the top wall of the box body 11. A power interface 13 is provided on the side wall of the box body 11. The power interface 13 is a type-c interface. The spare button battery is detachably installed in the charging battery slot 15. A circuit board 16 is installed inside the charging box 1. The power interface 13 and the power battery slot 14 both charge the spare button battery placed in the charging battery slot 15 through the circuit board 16.

[0028] like Figure 1 and Figure 2 As shown, the protective cover 12 is fixedly connected to an elastic buckle 121, and a cleaning brush 9 is embedded in the elastic buckle 121. The cleaning brush 9 includes a rod body 91, and five bundles of bristles 92 are connected to the rod body 91. One end of the rod body 91 is connected to a magnet 93, and the other end of the rod body 91 is connected to a steel needle 94. Since the button battery is small in size, it is not easy to take out after being placed in the rechargeable battery slot 15. The cleaning brush 9 is taken out from the elastic buckle 121, and the button battery is sucked out by the magnet 93, which facilitates the removal of the button battery. The bristles 92 can easily remove foreign matter such as debris on the surface of the hearing aid, and the steel needle 94 can hook out foreign matter at the sound outlet and sound tube of the hearing aid.

[0029] like Figure 3As shown, a backup charge management circuit 2 is connected between the power interface 13 and the rechargeable battery slot 15. The backup charge management circuit 2 is connected to the circuit board 16. The power interface 13 charges the battery installed in the rechargeable battery slot 15 through the backup charge circuit. The backup charge management circuit 2 includes a backup charge management chip 7 and a transistor VT152. The backup charge management chip 7 is a DS2711 chip. The emitter of the transistor VT1 of the power interface No. 1 interface is connected to the CC1 interface of the backup charge management chip through the base of the transistor VT1. The collector of the transistor VT1 is connected to the positive pole of the power battery slot. The No. 2 interface of the power interface is connected to the negative pole of the power battery slot 14. The VP1 interface of the backup charge management chip 7 is connected to the positive pole of the power battery slot 14.

[0030] like Figure 3 As shown, the backup charge management circuit 2 also includes a backup charge sampling circuit 3, a backup charge and discharge circuit 4, and a discharge control circuit 5. A main control microcontroller 8 is also connected to the circuit board 16. The main control microcontroller 8 is an STC15W401AS microcontroller. The backup charge sampling circuit 3 includes R14 and RP1. R14 and RP1 are connected in series and then in parallel across the charging battery slot 15. The middle pin of RP1 is connected to the P1.3 interface of the main control microcontroller 8. The backup charge and discharge circuit 4 includes R12 and VT2. The discharge control circuit 5 includes an optocoupler IC251. The light-emitting diode of the optocoupler IC251 is connected to the P3.2 interface of the main control microcontroller 8. The phototransistor of the optocoupler IC251 is connected to the emitter of VT152. R12 is connected to the collector of VT2. The emitter of VT2 is connected to the negative terminal of the power battery slot 14. The base of VT2 is connected to R13, which is connected to P1.4 of the main control microcontroller 8.

[0031] The sampling circuit connected in parallel with the power battery slot 14 samples the voltage across the power battery slot 14 and transmits it to the P1.3 pin of the main control microcontroller 8. When the main control microcontroller 8 detects that the voltage of the power battery slot 14 is less than 0.9V and less than 1.3V, the main control microcontroller 8 simultaneously issues two instructions:

[0032] Instruction 1: P1.3 port outputs a high level to make VT2 forward-biased, and the power battery passes through the positive electrode R7 → VT2 collector c → VT2 emitter e to the ground → through the ground back to the negative electrode of the backup battery, forming a discharge circuit;

[0033] Instruction 2: The P1.4 interface outputs a low level, the left half of the light-emitting diode of the optocoupler IC251 is forward-biased and turns on to emit light, and the right half of the phototransistor is turned on by the light, pulling the base b of VT152 to the power supply potential. VT152 is reverse-biased and cut off, and the connection with the backup charge management chip 7 is disconnected to maintain the power battery discharge state; during the power battery charging process, if the power is full but charging has not stopped, the backup charge and discharge circuit 4 starts discharging, and the discharge control circuit 5 cuts off the charging process, effectively avoiding the memory effect caused by overcharging;

[0034] When the voltage across the power battery detected by the backup charging sampling circuit 3 is below 0.9V, the main control microcontroller 8 simultaneously issues two instructions:

[0035] Instruction three: The P1.3 interface outputs a low level to make VT152 reverse bias cut off, cut off the discharge path, and stop the battery from discharging;

[0036] Instruction 4: P1.4 port outputs a high level, the left half-side light-emitting diode of the optocoupler IC251 is reverse-biased and cut off, and the phototransistor is cut off due to lack of light. VT152 is disconnected from the control of P1.4 port. At this time, the transistor VT1 is connected to the CC1 port of the backup charge management chip 7, and normal charging of the power battery is restored.

[0037] like Figures 1 to 3 As shown, the No. 1 interface of the power interface 13 is connected to an indicator light 111, which is connected to the box body 11 near the power battery position. The indicator light 111 is connected to the LED1 interface of the backup charge management chip 7. When the power battery in the power battery position is in a charging state, the indicator light 111 flashes to prompt the charging status of the power battery. The circuit board 16 is connected to the main charging management chip 6, which is a DS2711 chip. The No. 1 interface of the power interface 13 and the positive pole of the power battery slot 14 are connected to the CC1 interface and CC2 interface of the main charging management chip 6 through the emitter and base of the transistor VT3 and the transistor VT4. The collectors of the transistor VT3 and the transistor VT4 are respectively connected to the positive poles of the two charging battery slots 15; the VP1 interface and VP2 interface of the main charging management chip 6 are respectively connected to the positive poles of the two charging battery slots 15. The main control microcontroller 8 detects the voltage of the two charging battery slots 15, and the CC1 interface and CC2 interface adjust the working status of the transistor VT3 and the transistor VT4, thereby adjusting the charging current of the transistor VT3 and the transistor VT4 to the two charging battery slots 15.

[0038] like Figure 3 As shown, the power supply battery slot 14 is connected to the main control microcontroller 8 and the DS2711 chip via a boost circuit. The main control microcontroller 8 operates at 5V, while the DS2711 chip has an input voltage of 4.0-5.5V. The boost circuit 8 includes capacitors C1, C3, and C4, resistors R18, R15, R16, and R17, an inductor L1, and an NCP1422 chip. C1 is connected in parallel with the power supply battery slot 14, while R16 and R17 are connected in series and then in parallel with the power supply battery slot 14.

[0039] R16 is connected to the LBI / EN interface of the NCP1422 chip. The OUT interface of the NCP1422 chip is connected to the CC1 and CC2 interfaces of the DS2711 chip 621 via a bus. R18 has one end connected to the bus and the other end connected to the FB interface of the NCP1422 chip. C2 is connected in parallel with R1 and connected to R15. C3 has one end connected to the REF interface of the NCP1422 chip and the other end connected to the negative terminal of the power battery slot 14. Inductor L1 has one end connected to the positive terminal of the power battery slot 14 and the other end connected to the LX interface of the NCP1422 chip. The BAT interface of the NCP1422 chip is connected to the positive terminal of the power battery slot 14.

[0040] The implementation principle of the above embodiment is as follows: When using the charging box 1 to charge the backup battery, the backup battery is placed in the charging battery slot 15. At this time, the type-c port of the power interface 13 can be used to connect to a USB power source or a nickel-metal hydride battery can be installed in the power battery slot. The two backup batteries are charged through the main charging management chip 6. When the type-c port of the power interface 13 is connected to a USB power source, when the voltage of the nickel-metal hydride power battery installed in the power battery slot is lower than 0.9V, the main charging management chip 6 charges the power battery slot; when 0.9V < the power battery slot voltage < 1.3V, the backup charge and discharge circuit 4 is turned on for discharge, and the discharge control circuit 5 cuts off the charging power to maintain the discharge state, effectively avoiding the memory effect caused by overcharging of the power battery.

[0041] This specific embodiment is merely an explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed. However, as long as such modifications are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A dual-power intelligent offline dual-charging structure for hearing aids, characterized by: The invention comprises a charging box (1), wherein the charging box (1) is provided with a power interface (13), a power battery slot (14) and a charging battery slot (15), a spare button battery is detachably installed in the charging battery slot (15), and the number of the charging battery slots (15) is two. A circuit board (16) is installed inside the charging box (1), and the power interface (13) and the power battery slot (14) both charge the spare button battery placed in the charging battery slot (15) through the circuit board (16); A backup charge management circuit (2) is connected between the power interface (13) and the power battery slot (14), and the backup charge management circuit (2) is connected to the circuit board (16). The power interface (13) charges the battery installed in the power battery slot (14) through the backup charge management circuit (2); The backup charge management circuit (2) includes a backup charge management chip (7) and a transistor VT1 (52), wherein the backup charge management chip (7) is a DS2711 chip, and the power interface (13) is a type-C interface. Interface No. 1 of the power interface (13) is connected to the emitter of the transistor VT1 (52), the base of the transistor VT1 (52) is connected to the CC1 interface of the backup charge management chip (7), the collector of the transistor VT1 (52) is connected to the positive electrode of the power battery slot (14), and interface No. 2 of the power interface (13) is connected to the negative electrode of the power battery slot (14); The standby charge management circuit (2) further comprises a standby charge sampling circuit (3), a standby charge and discharge circuit (4) and a discharge control circuit (5); a main control microcontroller (8) is connected to the circuit board (16); the main control microcontroller (8) is an STC15W401AS microcontroller; the standby charge sampling circuit collects the voltage at both ends of the power battery slot (14) and transmits it to the main control microcontroller (8); the standby charge sampling circuit (3) comprises R14 and RP1; the R14 and RP1 are connected in series and then connected in parallel to both ends of the charging battery slot (15); the middle pin of the RP1 is connected to the P1.3 interface of the main control microcontroller (8); The standby charge and discharge circuit (4) includes R12 and VT2, and the discharge control circuit (5) includes an optocoupler IC2 (51). The light emitting diode of the optocoupler IC2 (51) is connected to the P3.2 interface of the main control microcontroller (8), the photosensitive transistor of the optocoupler IC2 (51) is connected to the emitter of VT1 (52), R12 is connected to the collector of VT2, the emitter of VT2 is connected to the negative electrode of the power battery slot (14), the base of VT2 is connected to R13, and R13 is connected to P1.4 of the main control microcontroller (8); The sampling circuit connected in parallel with the power battery slot (14) samples the voltage at both ends of the power battery slot (14) and transmits it to the P1.3 pin of the main control microcontroller (8). When the main control microcontroller (8) detects that 0.9V < the power battery slot (14) voltage < 1.3V, the main control microcontroller (8) simultaneously issues two instructions: Instruction 1: The P1.4 interface outputs a high level to make VT2 forward-biased. The power battery flows through the positive electrode → R12 → VT2 collector c → VT2 emitter e → through the ground and returns to the negative electrode of the backup battery, forming a discharge circuit; Instruction 2: The P3.2 interface outputs a low level, the left half of the light-emitting diode of the optocoupler IC2 (51) is forward-biased and turns on to emit light, and the right half of the photosensitive transistor is turned on by the light, pulling the base b of the transistor VT1 (52) up to the power supply potential, and the transistor VT1 (52) is reverse-biased and cut off, and the connection with the backup charge management chip (7) is interrupted to maintain the power battery discharge state; during the power battery charging process, when the power is full but the charging is not stopped, the backup charge and discharge circuit (4) starts to discharge, and the discharge control circuit (5) cuts off the charging process, effectively avoiding the memory effect caused by overcharging; When the voltage across the power battery collected by the backup sampling circuit (3) is below 0.9V, the main control microcontroller (8) simultaneously issues two instructions: Instruction three: The P1.4 interface outputs a low level to turn off VT2, cut off the discharge path, and the battery stops discharging; Instruction 4: The P3.2 interface outputs a high level, the left half of the light-emitting diode of the optocoupler IC2 (51) is reverse-biased and cut off, and the phototransistor is cut off due to the lack of light. The transistor VT1 (52) is disconnected from the control of the P3.2 interface. At this time, the transistor VT1 (52) is connected to the CC1 port of the backup charge management chip (7), and the normal charging of the power battery is restored.

2. The dual-power intelligent offline dual-charging structure for hearing aids according to claim 1, characterized in that: Interface No. 1 of the power interface (13) is connected to an indicator light (111), and the indicator light (111) is connected to the LED1 interface of the backup charge management chip (7).

3. The dual-power intelligent offline dual-charging structure for hearing aids according to claim 1, characterized in that: The circuit board (16) is connected to a main charging management chip (6), which is a DS2711 chip. The No. 1 interface of the power interface (13) and the positive electrode of the power battery slot (14) are connected to the CC1 interface and CC2 interface of the main charging management chip (6) through the emitter and base of the transistor VT3 and the transistor VT4. The collectors of the transistor VT3 and the transistor VT4 are respectively connected to the positive electrodes of the two charging battery slots (15).

4. The dual-power intelligent offline dual-charging structure for hearing aids according to claim 2, characterized in that: The charging box (1) includes a box body (11) and a protective cover (12) buckled onto the box body (11); the indicator light (111) and the power interface (13) are both arranged on the side wall of the box body (11); and the two charging battery slots (15) and the power battery slot (14) are both opened on the top wall of the box body (11).

5. The dual-power intelligent offline dual-charging structure for hearing aids according to claim 4, characterized in that: An elastic buckle (121) is fixedly connected to the protective cover (12), and a cleaning brush (9) is embedded in the elastic buckle (121).

6. The dual-power intelligent offline dual-charging structure for hearing aids according to claim 5, characterized in that: The cleaning brush (9) comprises a rod body (91), five bundles of bristles (92) are connected to the rod body (91), one end of the rod body (91) is connected to a magnet (93), and the other end of the rod body (91) is connected to a steel needle (94).

7. The dual-power intelligent offline dual-charging structure for hearing aids according to claim 4, characterized in that: The protective cover (12) is composed of a transparent plate.

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