Simple battery replacement electronic scale

Abstract

The application relates to the technical field of electronic scale power supply, and discloses a simple electronic scale with replaceable batteries, which comprises a scale base, a battery mounting module and a battery box module are arranged on the scale base, the battery mounting module comprises a mounting box and a connecting circuit arranged on the mounting box, the battery box module comprises a battery box body and a power supply circuit arranged on the battery box body, the battery box body is detachably connected with the mounting box, and the connecting circuit is connected with the power supply circuit. The simple electronic scale with replaceable batteries has perfect short-circuit prevention and open-circuit prevention functions when the battery mounting module and the battery box module are not assembled, the battery box body and the mounting box are detachably connected, the detachable connection mode is designed, the battery replacement / replacement procedure is fast and simple, and the use convenience is improved.

Description

Technical Field

[0001] This application relates to the field of electronic scale power supply technology, specifically an electronic scale with a simple battery replacement mechanism. Background Technology

[0002] The PoGo pins commonly used in handheld devices are simple and convenient, suitable for scenarios involving frequent plugging and unplugging, and their magnetic connection prevents incorrect power supply orientation and potential damage. However, when used in electronic scales, PoGo pins become larger fixtures, which are incompatible with the frequent plugging and unplugging functionality, yet such scenarios are desirable. For electronic scales using PoGo pins, especially when the pins are applied to frequently replaceable battery modules, increasing safety requirements and the inability to effectively protect the scale and battery from water immersion present challenges. Therefore, a solution to this problem is urgently needed. Summary of the Invention

[0003] The purpose of this application is to provide an electronic scale with a simple battery replacement mechanism to solve the technical problems mentioned in the background section.

[0004] To achieve the above objectives, this application discloses the following technical solution: an electronic scale with a simple battery replacement mechanism, comprising a scale base, a battery mounting module and a battery box module disposed on the scale base, the battery mounting module comprising a mounting box and a connection circuit disposed on the mounting box, the battery box module comprising a battery box body and a power supply circuit disposed on the battery box body, the battery box body being detachably connected to the mounting box, and the connection circuit being connected to the power supply circuit;

[0005] The connection circuit includes a VBAT terminal, resistors RP3 and RP4, transistor QP2, resistors RP2 and RP1, an NMOS transistor QP1, a bipolar TVS transient voltage suppressor diode DP2, a unidirectional capacitor CP1, a capacitor CP2, a pin equivalent connector POGO_Out, the unipolar TVS transient voltage suppressor diode DP1, and a DC 12V connection terminal. The VBAT terminal is connected to the first terminal of resistor RP3, the second terminal of resistor RP3 is connected to the base of transistor QP2, the first and second terminals of resistor RP4 are connected to the base and emitter of transistor QP2, respectively, the emitter of transistor QP2 is grounded, the collector of transistor QP2 is connected to the first terminal of resistor RP2, the second terminal of resistor RP2 is connected to the gate of NMOS transistor QP1, and the two terminals of resistor RP1 are connected to the source and gate of NMOS transistor QP1, respectively. The positive terminal of the unipolar TVS transient voltage suppressor diode DP1 is connected to the DC12V connection terminal. The negative terminal of the unipolar TVS transient voltage suppressor diode DP1 is connected to the source of the NMOS transistor QP1. The drain of the NMOS transistor QP1 is connected to the first terminal of the bipolar TVS transient voltage suppressor diode DP2. The second terminal of the bipolar TVS transient voltage suppressor diode DP2 is grounded. The first terminal of the bipolar TVS transient voltage suppressor diode DP2 is connected to the positive terminal of the unidirectional capacitor CP1. The negative terminal of the unidirectional capacitor CP1 is grounded. The first terminal of the bipolar TVS transient voltage suppressor diode DP2 is grounded through the capacitor CP2. The drain of the NMOS transistor QP1 is connected to pin 1 of the pin equivalent connector POGO_Out. Pins 2 and 4 of the pin equivalent connector POGO_Out are grounded. Pin 3 of the pin equivalent connector POGO_Out is connected to the VBAT terminal.

[0006] The power supply circuit includes a first module, a second module, a pin equivalent module, and a switch module;

[0007] The first module includes a PMOS transistor QV1, resistors RB1 and RB2, a transistor QV4, resistors RB5 and RB6; the second module includes a PMOS transistor QV2, resistors RB3 and RB4, a transistor QV5, resistors RB7 and RB8; the pin equivalent module includes a pin equivalent connector P1, capacitor CV8 and capacitor CV9; and the switch module includes a switch SW1.

[0008] The drain of the PMOS transistor QV1 is connected to pin 1 of the pin equivalent connector P1. The two ends of the resistor RB1 are connected to the source and gate of the PMOS transistor QV1, respectively. The first end of the resistor RB2 is connected to the gate of the PMOS transistor QV1, and the second end of the resistor RB2 is connected to the collector of the transistor QV4. The emitter of the transistor QV4 is grounded. The two ends of the resistor RB6 are connected to the base and emitter of the transistor QV4, respectively. The first end of the resistor RB5 is connected to the base of the transistor QV4, and the second end of the resistor RB5 is connected to the first terminal of the switch SW1. When the battery mounting module is assembled, the source of the PMOS transistor QV1 and the second terminal of the switch SW1 are connected to the VBAT terminal, respectively.

[0009] The source of the PMOS transistor QV2 is connected to a 12V power supply. The drain of the PMOS transistor QV2 is connected to pin 3 of the pin equivalent connector P1. The two ends of the resistor RB3 are connected to the source and gate of the PMOS transistor QV2, respectively. The first end of the resistor RB4 is connected to the gate of the PMOS transistor QV2. The second end of the resistor RB4 is connected to the collector of the transistor QV5. The emitter of the transistor QV5 is grounded. The two ends of the resistor RB8 are connected to the base and emitter of the transistor QV5, respectively. The first end of the resistor RB7 is connected to the base of the transistor QV5. The second end of the resistor RB7 is connected to the first terminal of the switch SW1. When the battery mounting module is assembled, the drain of the PMOS transistor QV2 is connected to pin 1 of the pin equivalent connector POGO_Out.

[0010] Pin 3 of the pin equivalent connector P1 is grounded through capacitors CV8 and CV9 connected in parallel, and pin 2 of the pin equivalent connector P1 is grounded.

[0011] In one embodiment, the unipolar TVS transient suppression diode DP1 is of model SK34.

[0012] In one embodiment, the bipolar TVS transient suppression diode DP2 is of model BV15C.

[0013] In one embodiment, the NMOS transistor QP1 is of model MTD20P03HDL.

[0014] In one embodiment, both PMOS transistors QV1 and QV2 are of model AO3407.

[0015] In one embodiment, the transistors QP2, QV4, and QV5 are all of model MMBT3904LT1.

[0016] Beneficial effects: The simplified battery replacement electronic scale of this application, through the design of the battery installation module and battery box module, ensures that when the battery installation module and battery box module are not assembled, the pin equivalent connector POGO_Out and pin equivalent connector P1 are not energized, and the battery box module cannot output voltage and current. This achieves complete protection against short circuits and open circuits, avoiding the situation where a short circuit would burn out the scale base and battery box. Furthermore, the battery box body and the installation box are designed to be detachable. Through the design of a convenient detachable connection method, the battery replacement / replacement steps can be realized quickly and easily, improving the ease of use. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A circuit schematic diagram of the connection circuit provided in the embodiments of this application;

[0019] Figure 2 The circuit diagram is shown for the power supply circuit provided in the embodiment of this application. Detailed Implementation

[0020] The technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] In this document, the term "comprising" is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0022] An electronic scale with a simple battery replacement mechanism includes a scale base, on which a battery mounting module and a battery compartment module are mounted. The battery mounting module includes a mounting box and a connection circuit mounted on the mounting box. The battery compartment module includes a battery housing and a power supply circuit mounted on the battery housing. The battery housing is detachably connected to the mounting box, and the connection circuit is connected to the power supply circuit. The scale base, mounting box, and battery housing can all be any of the existing technologies. As the names suggest, the scale base is the base structure of the scale body, on which a weighing pan or similar container can be mounted; the mounting box is the slot structure for mounting the power supply component (i.e., the battery compartment and the battery inside in this embodiment); and the battery compartment is the housing structure for holding the battery. In this embodiment, the battery compartment and the mounting box can be, but are not limited to, a snap-fit ​​connection, or they can be detachably fixed using screws or other methods.

[0023] Specifically, such as Figure 1As shown, the connection circuit includes a VBAT terminal, a resistor RP3 with a resistance of 2KΩ, a resistor RP4 with a resistance of 10KΩ, a transistor QP2, a resistor RP2 with a resistance of 20KΩ, a resistor RP1 with a resistance of 100KΩ, an NMOS transistor QP1, a bipolar TVS transient suppression diode DP2, a unidirectional capacitor CP1 with a capacitance of 100uF, a capacitor CP2 with a capacitance of 0.1uF, a pin equivalent connector POGO_Out, a unipolar TVS transient suppression diode DP1, and a DC12V connection terminal. The VBAT terminal is connected to the first terminal of resistor RP3, the second terminal of resistor RP3 is connected to the base of transistor QP2, the first and second terminals of resistor RP4 are connected to the base and emitter of transistor QP2 respectively, the emitter of transistor QP2 is grounded, the collector of transistor QP2 is connected to the first terminal of resistor RP2, the second terminal of resistor RP2 is connected to the gate of NMOS transistor QP1, the two terminals of resistor RP1 are connected to the source and gate of NMOS transistor QP1 respectively, the anode of unipolar TVS transient suppression diode DP1 is connected to the DC12V connection terminal, and the cathode of unipolar TVS transient suppression diode DP1 is connected to NMOS transistor QP1. The source of the NMOS transistor QP1 is connected to the source of the transistor. The drain of the NMOS transistor QP1 is connected to the first terminal of the bipolar TVS transient suppression diode DP2. The second terminal of the bipolar TVS transient suppression diode DP2 is grounded. The first terminal of the bipolar TVS transient suppression diode DP2 is connected to the positive terminal of the unidirectional capacitor CP1. The negative terminal of the unidirectional capacitor CP1 is grounded. The first terminal of the bipolar TVS transient suppression diode DP2 is grounded through the capacitor CP2. The drain of the NMOS transistor QP1 is connected to pin 1 of the pin equivalent connector POGO_Out. Pins 2 and 4 of the pin equivalent connector POGO_Out are grounded. Pin 3 of the pin equivalent connector POGO_Out is connected to the VBAT terminal.

[0024] When the connection circuit is connected to the DC12V socket but not to the battery, the battery module can function normally to power the scale. At this time, the VBAT terminal is not connected (i.e., not connected to the power supply circuit), so the equivalent connector POGO_Out will not have power, and pin 1 of the equivalent connector POGO_Out will not output power. Specifically, when the VBAT terminal is not connected, transistor QP2 is not conducting, which in turn prevents NMOS transistor QP1 from turning on. Therefore, there will be no voltage output on the exposed equivalent connector POGO_Out, and it will not be measured. This prevents a short circuit from burning out the entire scale. When the battery box is connected to the scale body, the VBAT terminal is connected, meaning the VBAT terminal is powered. This power will turn on NMOS transistor QP1 and transistor QP2, resulting in voltage and current output, allowing the VBAT terminal to provide power to the scale. Alternatively, when the adapter is connected via the connection circuit, it can power the battery box module for battery charging, etc.

[0025] Specifically, such as Figure 2 As shown, the power supply circuit includes a first module, a second module, a pin equivalent module, and a switch module.

[0026] The first module includes a PMOS transistor QV1, a resistor RB1 with a resistance of 100KΩ, a resistor RB2 with a resistance of 20KΩ, a transistor QV4, a resistor RB5 with a resistance of 10KΩ, and a resistor RB6 with a resistance of 4.7KΩ. The second module includes a PMOS transistor QV2, a resistor RB3 with a resistance of 100KΩ, a resistor RB4 with a resistance of 20KΩ, a transistor QV5, a resistor RB7 with a resistance of 10KΩ, and a resistor RB8 with a resistance of 4.7KΩ. The pin equivalent module includes a pin equivalent connector P1, a capacitor CV8 with a capacitance of 0.1uF, and a capacitor CV9 with a capacitance of 10uF. The switch module includes a switch SW1.

[0027] The drain of the PMOS transistor QV1 is connected to pin 1 of the pin equivalent connector P1. The two ends of the resistor RB1 are connected to the source and gate of the PMOS transistor QV1, respectively. The first end of the resistor RB2 is connected to the gate of the PMOS transistor QV1, and the second end of the resistor RB2 is connected to the collector of the transistor QV4. The emitter of the transistor QV4 is grounded. The two ends of the resistor RB6 are connected to the base and emitter of the transistor QV4, respectively. The first end of the resistor RB5 is connected to the base of the transistor QV4, and the second end of the resistor RB5 is connected to the first terminal of the switch SW1. When the battery mounting module is assembled, the source of the PMOS transistor QV1 and the second terminal of the switch SW1 are connected to the VBAT terminal, respectively.

[0028] The source of PMOS transistor QV2 is connected to a 12V power supply. The drain of PMOS transistor QV2 is connected to pin 3 of the pin equivalent connector P1. The two ends of resistor RB3 are connected to the source and gate of PMOS transistor QV2, respectively. The first end of resistor RB4 is connected to the gate of PMOS transistor QV2. The second end of resistor RB4 is connected to the collector of transistor QV5. The emitter of transistor QV5 is grounded. The two ends of resistor RB8 are connected to the base and emitter of transistor QV5, respectively. The first end of resistor RB7 is connected to the base of transistor QV5. The second end of resistor RB7 is connected to the first terminal of switch SW1. When assembling the battery mounting module, the drain of PMOS transistor QV2 is connected to pin 1 of the pin equivalent connector POGO_Out.

[0029] Pin 3 of the pin equivalent connector P1 is grounded through capacitors CV8 and CV9 connected in parallel, and pin 2 of the pin equivalent connector P1 is grounded.

[0030] The battery box module connects to the scale base via pin equivalent connector P1. Through the power supply circuit, the battery can be charged via an adapter. In this case, pin equivalent connector P1 will not short-circuit or burn out the battery. When connected to the electronic scale, it can stably power the scale and also receive power from the scale's adapter port for battery charging. Specifically, when switch SW1 is not closed, transistors QV4 and QV5 will not conduct, consequently preventing PMOS transistors QV1 and QV2 from conducting and thus preventing voltage output. Consequently, pin equivalent connector P1 will also not output any voltage, ensuring that no voltage is generated when the battery box is not connected to the scale base. When the battery box module and battery mounting module are assembled, and switch SW1 is closed (it is feasible to make a protrusion on the pressing part of switch SW1, so that when the battery box and mounting box are assembled, the protrusion is squeezed and the switch SW1 is closed), the VBAT&VDD_12V-ON / OFF signal at the pin will be GND, which will turn on transistors QV4 and QV5, and then turn on PMOS transistors QV1 and QV2. At this time, the VBAT terminal and the 12V power supply voltage (VDD_12V) will start to output voltage. That is, after the battery box module and battery mounting module are assembled, the battery can normally power the electronic scale, and the adapter on the electronic scale can also be used to charge the battery.

[0031] Based on the above, the simplified battery replacement electronic scale of this embodiment, through the design of the battery installation module and battery box module, ensures that when the battery installation module and battery box module are not assembled, the pin equivalent connector POGO_Out and pin equivalent connector P1 are not energized, and the battery box module cannot output voltage and current. This achieves complete protection against short circuits and open circuits, avoiding the situation where a short circuit would burn out the scale base and battery box. Furthermore, the battery box body and the installation box are designed to be detachable. Through the design of a convenient detachable connection method, the battery replacement / replacement steps can be realized quickly and easily, improving the ease of use.

[0032] In this embodiment, the unipolar TVS transient suppression diode DP1 is model SK34, the bipolar TVS transient suppression diode DP2 is model BV15C, the NMOS transistor QP1 is model MTD20P03HDL, the PMOS transistors QV1 and QV2 are both model AO3407, and the transistors QP2, QV4, and QV5 are all model MMBT3904LT1.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of this application and is not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An electronic scale with a simple battery replacement mechanism, comprising a scale base, wherein the scale base is provided with a battery mounting module and a battery box module, characterized in that, The battery mounting module includes a mounting box and a connection circuit disposed on the mounting box. The battery box module includes a battery box body and a power supply circuit disposed on the battery box body. The battery box body is detachably connected to the mounting box, and the connection circuit is connected to the power supply circuit. The connection circuit includes a VBAT terminal, resistors RP3 and RP4, transistor QP2, resistors RP2 and RP1, an NMOS transistor QP1, a bipolar TVS transient voltage suppressor diode DP2, a unidirectional capacitor CP1, a capacitor CP2, a pin equivalent connector POGO_Out, the unipolar TVS transient voltage suppressor diode DP1, and a DC 12V connection terminal. The VBAT terminal is connected to the first terminal of resistor RP3, the second terminal of resistor RP3 is connected to the base of transistor QP2, the first and second terminals of resistor RP4 are connected to the base and emitter of transistor QP2, respectively, the emitter of transistor QP2 is grounded, the collector of transistor QP2 is connected to the first terminal of resistor RP2, the second terminal of resistor RP2 is connected to the gate of NMOS transistor QP1, and the two terminals of resistor RP1 are connected to the source and gate of NMOS transistor QP1, respectively. The positive terminal of the unipolar TVS transient voltage suppressor diode DP1 is connected to the DC12V connection terminal. The negative terminal of the unipolar TVS transient voltage suppressor diode DP1 is connected to the source of the NMOS transistor QP1. The drain of the NMOS transistor QP1 is connected to the first terminal of the bipolar TVS transient voltage suppressor diode DP2. The second terminal of the bipolar TVS transient voltage suppressor diode DP2 is grounded. The first terminal of the bipolar TVS transient voltage suppressor diode DP2 is connected to the positive terminal of the unidirectional capacitor CP1. The negative terminal of the unidirectional capacitor CP1 is grounded. The first terminal of the bipolar TVS transient voltage suppressor diode DP2 is grounded through the capacitor CP2. The drain of the NMOS transistor QP1 is connected to pin 1 of the pin equivalent connector POGO_Out. Pins 2 and 4 of the pin equivalent connector POGO_Out are grounded. Pin 3 of the pin equivalent connector POGO_Out is connected to the VBAT terminal. The power supply circuit includes a first module, a second module, a pin equivalent module, and a switch module; The first module includes a PMOS transistor QV1, resistors RB1 and RB2, a transistor QV4, resistors RB5 and RB6; the second module includes a PMOS transistor QV2, resistors RB3 and RB4, a transistor QV5, resistors RB7 and RB8; the pin equivalent module includes a pin equivalent connector P1, capacitor CV8 and capacitor CV9; and the switch module includes a switch SW1. The drain of the PMOS transistor QV1 is connected to pin 1 of the pin equivalent connector P1. The two ends of the resistor RB1 are connected to the source and gate of the PMOS transistor QV1, respectively. The first end of the resistor RB2 is connected to the gate of the PMOS transistor QV1, and the second end of the resistor RB2 is connected to the collector of the transistor QV4. The emitter of the transistor QV4 is grounded. The two ends of the resistor RB6 are connected to the base and emitter of the transistor QV4, respectively. The first end of the resistor RB5 is connected to the base of the transistor QV4, and the second end of the resistor RB5 is connected to the first terminal of the switch SW1. When the battery mounting module is assembled, the source of the PMOS transistor QV1 and the second terminal of the switch SW1 are connected to the VBAT terminal, respectively. The source of the PMOS transistor QV2 is connected to a 12V power supply. The drain of the PMOS transistor QV2 is connected to pin 3 of the pin equivalent connector P1. The two ends of the resistor RB3 are connected to the source and gate of the PMOS transistor QV2, respectively. The first end of the resistor RB4 is connected to the gate of the PMOS transistor QV2. The second end of the resistor RB4 is connected to the collector of the transistor QV5. The emitter of the transistor QV5 is grounded. The two ends of the resistor RB8 are connected to the base and emitter of the transistor QV5, respectively. The first end of the resistor RB7 is connected to the base of the transistor QV5. The second end of the resistor RB7 is connected to the first terminal of the switch SW1. When the battery mounting module is assembled, the drain of the PMOS transistor QV2 is connected to pin 1 of the pin equivalent connector POGO_Out. Pin 3 of the pin equivalent connector P1 is grounded through capacitors CV8 and CV9 connected in parallel, and pin 2 of the pin equivalent connector P1 is grounded.

2. The electronic scale with a simple battery replacement according to claim 1, characterized in that, The unipolar TVS transient suppression diode DP1 is model SK34.

3. The electronic scale with a simple battery replacement according to claim 1, characterized in that, The bipolar TVS transient suppression diode DP2 is model BV15C.

4. The electronic scale with a simple battery replacement according to claim 1, characterized in that, The NMOS transistor QP1 is model MTD20P03HDL.

5. The electronic scale with a simple battery replacement according to claim 1, characterized in that, Both PMOS transistors QV1 and QV2 are of model AO3407.

6. The electronic scale with a simple battery replacement according to claim 1, characterized in that, The transistors QP2, QV4, and QV5 are all of model MMBT3904LT1.

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