CN216489833U - Charging indication circuit and electric toothbrush - Google Patents
Charging indication circuit and electric toothbrush Download PDFInfo
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- CN216489833U CN216489833U CN202122964556.0U CN202122964556U CN216489833U CN 216489833 U CN216489833 U CN 216489833U CN 202122964556 U CN202122964556 U CN 202122964556U CN 216489833 U CN216489833 U CN 216489833U
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- 230000000694 effects Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 7
- 239000004065 semiconductor Substances 0.000 description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- 230000009471 action Effects 0.000 description 5
- 229910052744 lithium Inorganic materials 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000010280 constant potential charging Methods 0.000 description 1
- 238000010277 constant-current charging Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001795 light effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004347 surface barrier Methods 0.000 description 1
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Abstract
The embodiment of the application provides a charging indicating circuit and an electric toothbrush, and relates to the technical field of electronic devices. The charging indication circuit comprises a diode component and an indication lamp component; the diode component comprises a first diode and a second diode, wherein the anode of the first diode is connected with the battery, and the anode of the second diode is connected with an external power supply; the indicating lamp assembly comprises at least one indicating lamp, one end of the indicating lamp is respectively connected with the cathode of the first diode and the cathode of the second diode, and the other end of the indicating lamp is connected with the control chip. The charging indication circuit can achieve the technical effect that the charging indication is automatically switched between external power supply and battery power supply.
Description
Technical Field
The application relates to the technical field of electronic devices, in particular to a charging indicating circuit and an electric toothbrush.
Background
At present, more and more handheld chargeable products are provided, charging circuit modes are various, charging indicating circuits are also various, the electric quantity state in the charging process is indicated, the light effect display is mostly performed, multiple light-emitting diodes (LEDs) are used for combined indication, and meanwhile, a mode indicating lamp and an electric quantity indicating lamp are multiplexed. The batteries mostly use lithium batteries, and the silk-flow charging is not carried out after the batteries are charged.
In the conventional charging system, the lithium battery is generally charged by using 4056 charging chips, such as an Integrated Circuit (IC) chip for charge management, wherein the charging process is performed by first performing constant-current charging to the maximum charging voltage of the battery, then performing constant-voltage charging to a cut-off current, and the battery is not charged with current after being fully charged. At the moment, the 4056 charging single control indication function is generally used, the LED is powered by an external charging power supply, the display circuit is not powered by the battery, and the battery is in a full power state when being taken down at any time. If the power indication and the product mode indicator lamp are shared, the mode lamp is generally controlled by the single chip microcomputer, the power indication lamp is powered by the battery end, after the battery is fully charged, the charging IC is charged, the battery is not charged, and when the charging wire is not pulled out, the power of the battery can be consumed all the time when the indicator lamp is normally on, particularly, the number of the indicator lamps is large, and the power of the battery can be consumed for a long time.
SUMMERY OF THE UTILITY MODEL
An object of the embodiment of the application is to provide a charging indication circuit and an electric toothbrush, which can achieve the technical effect that the charging indication is automatically switched between external power supply and battery power supply.
In a first aspect, embodiments of the present application provide a charge indicator circuit, including a diode assembly and an indicator light assembly;
the diode component comprises a first diode and a second diode, wherein the anode of the first diode is connected with the battery, and the anode of the second diode is connected with an external power supply;
the indicating lamp assembly comprises at least one indicating lamp, one end of the indicating lamp is respectively connected with the cathode of the first diode and the cathode of the second diode, and the other end of the indicating lamp is connected with the control chip.
In the implementation process, the cathode of the first diode and the cathode of the second diode are connected together, the anode of the first diode is connected with the battery, the anode of the second diode is connected with an external power supply, the first diode and the second diode are used for supplying power to the indicating lamp assembly together, and the two paths of power supply can be freely switched by using the principle of external power supply as priority by utilizing the switching action of unidirectional conduction of the diodes; when the power supply is charged, the indicating lamp assembly is powered by an external power supply, and when the power supply is not charged, the indicating lamp assembly is powered by a battery; therefore, under the condition that the charging indicator lamp and the mode indicator lamp are multiplexed, the indicator lamp assembly does not consume the electric quantity of the battery any more after being fully charged but is powered by an external power supply, and when the indicator lamp is not charged, the electric quantity of the battery is consumed by the indicator lamp, so that the problem that the electric quantity of the battery is consumed due to the fact that the indicator lamp is always on after being fully charged in the prior art is solved; therefore, the charging indication circuit can achieve the technical effect that the charging indication is automatically switched between the external power supply and the battery power supply.
Further, the indicating lamp assembly further comprises at least one current limiting resistor, the current limiting resistor is connected with the indicating lamps in series, and the number of the current limiting resistors corresponds to the number of the indicating lamps.
In the implementation process, the current of the branch circuit is limited through the current-limiting resistor, so that the series-connected components are prevented from being burnt by overlarge current, and the safety of the charging indicating circuit is improved.
Further, the indicator light is a light emitting diode.
Further, the first diode is a schottky diode.
Further, the second diode is a rectifier diode.
In a second aspect, embodiments of the present application provide an electric toothbrush comprising a charge indication circuit as described in any one of the first aspects.
Further, the electric toothbrush further comprises a charging management chip, and the charging management chip is connected with the battery.
Further, the electric toothbrush further comprises a control chip, and the control chip is respectively connected with the charging management chip and the battery.
Furthermore, the electric toothbrush also comprises a motor and a motor driving circuit, and the control chip is respectively connected with the motor and the motor driving circuit.
Further, the electric toothbrush further comprises a battery protection chip connected with the battery.
Additional features and advantages of the disclosure will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the above-described techniques.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a circuit schematic diagram of a charge indication circuit according to an embodiment of the present disclosure;
fig. 2 is a schematic circuit diagram of a charging management chip according to an embodiment of the present disclosure;
fig. 3 is a schematic circuit diagram of a control chip according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram of a motor driving circuit and a motor provided in an embodiment of the present application;
fig. 5 is a schematic diagram of an external power input detection circuit according to an embodiment of the present disclosure;
fig. 6 is a schematic circuit diagram of a battery protection chip according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
The embodiment of the application provides a charging indicating circuit and an electric toothbrush, which can be applied to charging indication or mode indication; the cathode of the first diode and the cathode of the second diode in the charging indicating circuit are connected together, the anode of the first diode is connected with the battery, the anode of the second diode is connected with an external power supply, the first diode and the second diode are used for supplying power to the indicating lamp assembly together, and the two paths of power supply can be freely switched by using the principle of external power supply as priority by utilizing the unidirectional conductive switching action of the diodes; when the power supply is charged, the indicating lamp assembly is powered by an external power supply, and when the power supply is not charged, the indicating lamp assembly is powered by a battery; therefore, under the condition that the charging indicator lamp and the mode indicator lamp are multiplexed, the indicator lamp assembly does not consume the electric quantity of the battery any more after being fully charged but is powered by an external power supply, and when the indicator lamp is not charged, the electric quantity of the battery is consumed by the indicator lamp, so that the problem that the electric quantity of the battery is consumed due to the fact that the indicator lamp is always on after being fully charged in the prior art is solved; therefore, the charging indication circuit can achieve the technical effect that the charging indication is automatically switched between the external power supply and the battery power supply.
Referring to fig. 1, fig. 1 is a circuit schematic diagram of a charge indication circuit provided in an embodiment of the present application, where the charge indication circuit includes a diode component 100 and an indication lamp component 200.
Illustratively, the diode assembly 100 includes a first diode D6 and a second diode D9, the anode of the first diode D6 being connected to the battery VBAT, and the anode of the second diode D9 being connected to an external power source.
Exemplarily, in the charge indication circuit shown in fig. 1, the voltage of the external power supply is + 5V; it should be understood that the voltage of the external power source may be other values, by way of example only and not by way of limitation.
Illustratively, the indicator lamp assembly 200 includes at least one indicator lamp, one end of the indicator lamp is connected to the cathode of the first diode and the cathode of the second diode respectively, and the other end of the indicator lamp is connected to the control chip.
For example, in the charge indicating circuit shown in fig. 1, the light emitting diodes D1 to D5 are used as the indicator lights in the indicator light assembly 200; each light-emitting diode is connected in a similar manner, one end of each light-emitting diode is respectively connected with the cathode of the first diode and the cathode of the second diode, and the other end of each light-emitting diode is connected with the control chip; the difference is that the ports of the leds D1 to D5 connected to the control chip are different, and the indication modes of the leds D1 to D5 can be controlled by different ports of the control chip.
In some implementation scenarios, the cathode of the first diode D6 and the cathode of the second diode D9 are connected together, the anode of the first diode D6 is connected to the battery, the anode of the second diode D9 is connected to the external power source, the indicator light assembly 200 is powered by the first diode D6 and the second diode D9 together, and the two power supplies can be freely switched on the principle of external power supply as priority by using the switching function of unidirectional conduction of the diodes; when charging, the indicator light assembly 200 is powered by an external power source, and when not charging, the indicator light assembly 200 is powered by a battery; therefore, under the condition that the charging indicator light and the mode indicator light are multiplexed, the indicator light assembly 200 does not consume the electric quantity of the battery any more after being fully charged, but is powered by an external power supply, and when the indicator light assembly 200 is not charged, the electric quantity of the battery is consumed, so that the problem that the electric quantity of the battery is consumed due to the fact that the indicator light is always on after being fully charged in the prior art is solved; therefore, the charging indication circuit can achieve the technical effect that the charging indication is automatically switched between the external power supply and the battery power supply.
In some embodiments, the indicator light assembly 200 further comprises at least one current limiting resistor in series with the indicator lights, the number of current limiting resistors corresponding to the number of indicator lights.
Illustratively, the current of the branch circuit is limited by the current-limiting resistor, so that the series-connected components are prevented from being burnt out due to overlarge current, and the safety of the charging indicating circuit is improved.
For example, as shown in fig. 1, the current-limiting resistors R1, R2, R3, R12, and R13 are respectively connected in series in the branch where the leds D1 to D5 are located, so as to limit the magnitude of the current in the branch where the leds are located.
Illustratively, the indicator light is a light emitting diode.
Illustratively, a light emitting diode, abbreviated as LED, is a commonly used light emitting device that emits light by energy released by recombination of electrons and holes, and is widely used in the field of illumination. The light emitting diode can efficiently convert electric energy into light energy, and has wide application in modern society, such as illumination, flat panel display, medical devices and the like.
Illustratively, the first diode D6 is a schottky diode.
Illustratively, Schottky diodes, i.e., Schottky Barrier Diodes (SBDs); the Schottky diode is manufactured by utilizing a metal-semiconductor junction principle formed by contacting a metal and a semiconductor instead of utilizing a PN junction principle formed by contacting a P-type semiconductor and an N-type semiconductor; thus, a schottky diode, also known as a metal-semiconductor (contact) diode or surface barrier diode, is a type of hot carrier diode.
Illustratively, the second diode D9 is a rectifier diode.
Illustratively, a rectifier diode is a semiconductor device that converts alternating current power to direct current power; generally, the junction comprises a PN junction and has a positive terminal and a negative terminal; the most important characteristic of a diode is one-way conductivity; in the circuit, current can only flow in from the anode and flow out from the cathode of the diode.
In some implementations, the first diode D6 is a schottky diode with a conventional tube voltage drop of about 0.2V, such as 1N5819, and the second diode D9 is a rectifier diode 1N4148 with a conventional tube voltage drop of about 0.7V; the battery that this application embodiment provided is the lithium cell, and external power supply's voltage is + 5V.
Illustratively, the full cut-off voltage of the lithium battery is generally 4.2V, that is, the full charge state of the battery is also about 4.2V, the external input charging voltage is generally 5V, when the external power supply is connected to charge, the external power supply can also supply power to the current-limiting resistor and the light-emitting diode through the second diode D9, the voltage of the external power supply 5V is reduced by 0.7V (to 4.3V) through the second diode D9, while the voltage of the battery 4.2V is reduced by only 0.2V (to 4.0V) through the first diode D6, since the voltage of the external input voltage after passing through the diode is 4.3V greater than the voltage of the battery 4.0V after passing through the diode, the indication lamp assembly 200 is mainly provided by the external power supply +5V, and due to the unidirectional conductive capability of the first diode D6, the external power supply cannot reversely charge the battery through the second diode D9 and then the first diode D6; when the external power supply +5V is removed when the battery is not charged, the charging indicating circuit is powered by the battery through the first diode D6, and normal mode indication can be completed.
Illustratively, the voltage across indicator light assembly 200 is uniform by using two different types of diode drops, first diode D6 and second diode D9, to maintain uniform brightness of indicator light assembly 200 when two power sources are provided.
Illustratively, the present application provides a power toothbrush that includes a charge indicator circuit as shown in fig. 1.
Referring to fig. 2, fig. 2 is a circuit schematic diagram of a charge management chip according to an embodiment of the present disclosure.
Illustratively, the electric toothbrush further includes a charge management chip connected to the battery.
Illustratively, the model of the charging management chip may be TP4055, it should be noted that the signal of the charging management chip is only used as an example and not a limitation, and the charging management chip may also be another model; as shown in fig. 2, the port CH _ STATE of the charging management chip is a charging status indication terminal, and may be connected to the port CH _ STATE of the control chip; in addition, pin 3 of the charge management chip is connected to the positive electrode of the battery VBAT, and pin 4 of the charge management chip is connected to an external power supply (+ 5V).
Referring to fig. 3, fig. 3 is a circuit schematic diagram of a control chip according to an embodiment of the present disclosure.
Exemplarily, the electric toothbrush further comprises a control chip, and the control chip is respectively connected with the charging management chip and the battery.
Illustratively, the model of the control chip may be HT66F004, it should be noted that the signal of the control chip is only an example and not a limitation, and the control chip may also be of other models; as shown in fig. 3, a port CH _ STATE of the control chip is connected to the charging management chip, a port MOTOR _ OUT of the control chip is connected to the MOTOR driving circuit, a port CH _ INPUT of the control chip is connected to the external power access detection circuit, that is, the port CH _ INPUT is connected to the external power INPUT end, when the external power is accessed, the electric toothbrush enters a charging STATE, and when the external power is not accessed, the electric toothbrush enters a standby STATE; the ports LED1 to LED5 of the control chip are respectively connected to the LEDs of the indicator light assembly 200, the port SW of the control chip is connected to the button of the electric toothbrush, and the pin 16 of the control chip is connected to the positive electrode of the battery VBAT.
Referring to fig. 4 and 5, fig. 4 is a schematic diagram of a motor driving circuit and a motor provided in an embodiment of the present application, and fig. 5 is a schematic diagram of an external power input detection circuit provided in the embodiment of the present application.
Exemplarily, the electric toothbrush further comprises a motor and a motor driving circuit, and the control chip is respectively connected with the motor and the motor driving circuit.
Illustratively, the external power INPUT detection circuit shown in fig. 5 provides a signal to the control chip through CH _ INPUT when the external power is connected.
Referring to fig. 6, fig. 6 is a circuit schematic diagram of a battery protection chip according to an embodiment of the present disclosure.
Illustratively, the electric toothbrush further includes a battery protection chip connected to the battery.
The model of the battery protection chip may be DW02A, and it should be noted that the signal of the battery protection chip is only used as an example and not a limitation, and other models of the battery protection chip may be used; the pin 3 of the battery protection chip is connected with the positive electrode of the VBAT of the battery, and the pin 1 of the battery protection chip is connected with the negative electrode of the VBAT of the battery, so that the protection functions of over-voltage charging protection, over-voltage discharging protection, over-current discharging protection and the like of the battery can be realized.
Illustratively, the embodiment of the application provides an electric toothbrush, which comprises a charging management chip, a charging management module and a control module, wherein the charging management chip is used for performing charging management on a battery of the electric toothbrush; the control chip is used for controlling the motor drive of the electric toothbrush, the state indication drive of the electric toothbrush, responding to a key input instruction of a user and the sampling of the battery voltage; and the motor driving circuit is used for amplifying the motor driving signal output by the control chip and driving the motor. And an indicator lamp assembly for displaying a selection mode when the electric toothbrush is operated and displaying the battery power when the electric toothbrush is in a charging state. When the electric toothbrush is in a working mode, the power supply of the indicating lamp assembly is provided by the lithium battery, and the anode VBAT + of the battery is grounded through the first diode D6, the current-limiting resistor, the light-emitting diode connected with the current-limiting resistor and the IO interface of the control chip, so that the on-off and lighting of the indicating lamp assembly can be controlled.
In the several embodiments provided in the present application, it should be understood that the functional modules in the respective embodiments may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. A charge indicator circuit comprising a diode assembly and an indicator light assembly;
the diode component comprises a first diode and a second diode, wherein the anode of the first diode is connected with the battery, and the anode of the second diode is connected with an external power supply;
the indicating lamp assembly comprises at least one indicating lamp, one end of the indicating lamp is respectively connected with the cathode of the first diode and the cathode of the second diode, and the other end of the indicating lamp is connected with the control chip.
2. The charge indicator circuit of claim 1, wherein the indicator light assembly further comprises at least one current limiting resistor in series with the indicator lights, the number of current limiting resistors corresponding to the number of indicator lights.
3. The charge indicator circuit of claim 2, wherein the indicator light is a light emitting diode.
4. The charge indicator circuit of claim 1, wherein the first diode is a schottky diode.
5. The charge indicating circuit of claim 1, wherein the second diode is a rectifier diode.
6. An electric toothbrush characterized in that it comprises a charge indication circuit according to any one of claims 1 to 5.
7. The electric toothbrush of claim 6, further comprising a charge management chip, the charge management chip being connected to the battery.
8. The electric toothbrush of claim 7, further comprising a control chip, the control chip being connected to the charge management chip and the battery, respectively.
9. The electric toothbrush according to claim 6, further comprising a motor and a motor driving circuit, wherein the control chip is connected to the motor and the motor driving circuit, respectively.
10. The electric toothbrush of claim 6, further comprising a battery protection chip connected to the battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122964556.0U CN216489833U (en) | 2021-11-29 | 2021-11-29 | Charging indication circuit and electric toothbrush |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122964556.0U CN216489833U (en) | 2021-11-29 | 2021-11-29 | Charging indication circuit and electric toothbrush |
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| Publication Number | Publication Date |
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| CN216489833U true CN216489833U (en) | 2022-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122964556.0U Active CN216489833U (en) | 2021-11-29 | 2021-11-29 | Charging indication circuit and electric toothbrush |
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- 2021-11-29 CN CN202122964556.0U patent/CN216489833U/en active Active
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