CN210894626U - Battery voltage detection system and electric toothbrush - Google Patents
Battery voltage detection system and electric toothbrush Download PDFInfo
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- CN210894626U CN210894626U CN201921301945.1U CN201921301945U CN210894626U CN 210894626 U CN210894626 U CN 210894626U CN 201921301945 U CN201921301945 U CN 201921301945U CN 210894626 U CN210894626 U CN 210894626U
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Abstract
The utility model provides a battery voltage detection system and an electric toothbrush, relating to the technical field of electric toothbrush battery detection, comprising a main control circuit, a first detection circuit, a second detection circuit and a standard voltage conversion circuit; the output end of the standard voltage conversion circuit is connected with one end of a second detection circuit, and the other end of the second detection circuit is connected to the main control circuit; the input end of the standard voltage conversion circuit is connected with one end of the first detection circuit; the other end of the first detection circuit is connected to the main control circuit; the first detection circuit is used for detecting a first voltage at the input end side of the standard voltage conversion circuit; the second detection circuit is used for detecting a second voltage at the output end side of the standard voltage conversion circuit; the main control circuit is used for obtaining the battery discharge voltage according to the first voltage and the second voltage. The technical problem that the reference base voltage is not set in advance by a plurality of electric devices in the prior art, so that the battery discharge voltage is difficult to monitor is solved.
Description
Technical Field
The utility model belongs to the technical field of electric toothbrush battery detects technique and specifically relates to a battery voltage detecting system and electric toothbrush are related to.
Background
At present, with more and more portable electric devices in the market, there is an increasing demand for real-time detection of battery discharge voltage, and a reference base voltage is often set in advance to determine the battery discharge voltage. However, many existing electric devices do not set a reference base voltage in advance, so when the industry faces this situation, only the whole detection system can be replaced, or a microcontroller with an internal reference voltage can be replaced to calculate the battery discharge voltage, which is troublesome to implement.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a battery voltage detection system and electric toothbrush to alleviate a plurality of electric equipment that exist among the prior art and not set up reference basis voltage in advance and lead to the technical problem of monitoring battery discharge voltage difficulty.
The utility model provides a pair of battery voltage detecting system, include: the device comprises a main control circuit, a first detection circuit, a second detection circuit and a standard voltage conversion circuit;
the input end of the standard voltage conversion circuit is connected with one end of the second detection circuit, and the other end of the second detection circuit is connected to the main control circuit; the output end of the standard voltage conversion circuit is connected with one end of the first detection circuit; the other end of the first detection circuit is connected to the main control circuit;
the standard voltage conversion circuit is used for connecting a battery at the input end side and converting the discharge voltage of the battery into a standard voltage;
the first detection circuit is used for detecting a first voltage at the output end side of the standard voltage conversion circuit;
the second detection circuit is used for detecting a second voltage at the input end side of the standard voltage conversion circuit;
the main control circuit is used for obtaining a battery discharge voltage according to the first voltage and the second voltage.
Further, the first detection circuit includes: a first end of the first resistance circuit is connected to the output end of the standard voltage conversion circuit, a second end of the first resistance circuit is grounded, and a third end of the first resistance circuit is connected to the main control circuit;
the second detection circuit includes: a first end of the second resistance circuit is connected to the input end of the standard voltage conversion circuit, a second end of the second resistance circuit is grounded, and a third end of the second resistance circuit is connected to the main control circuit;
the main control circuit is used for obtaining a battery discharge voltage according to the resistance value of the first resistance circuit, the resistance value of the second resistance circuit, the first voltage and the second voltage.
Further, the first resistance circuit includes: the first end of the first resistor is connected to the output end of the standard voltage conversion circuit, the second end of the first resistor is connected in series with the second resistor to be grounded, and the third end of the first resistor is connected with the main control circuit.
Further, the second resistance circuit includes: the first end of the third resistor is connected to the input end of the standard voltage conversion circuit, the second end of the third resistor is connected in series with the fourth resistor and is grounded, and the third end of the third resistor is connected with the main control circuit.
Further, the system further comprises: the display control circuit is connected with the main control circuit;
the main control circuit is used for generating the battery electric quantity condition according to the battery discharge voltage and sending the battery electric quantity condition to the display control circuit;
the display control circuit is used for displaying the battery power condition.
Further, the system further comprises: and the discharge management circuit is connected with the battery and is used for protecting the battery.
Further, the discharge management circuit includes a controller;
the first end of the controller is connected with the anode of the battery, the second end of the controller is connected with the cathode of the battery, and the third end of the controller is grounded;
the controller is used for cutting off the first end of the controller and the third end of the controller when detecting that the battery works abnormally, so that the battery can stop working.
Further, the system further comprises: a motor control circuit;
the motor control circuit is respectively connected with the main control circuit and a power supply path of the motor; the power supply circuit of the motor comprises a circuit consisting of the motor and a battery;
the main control circuit is used for judging the condition of the battery according to the discharge voltage of the battery, and cutting off a power supply path of the motor through the motor control circuit to stop the operation of the motor when judging that the battery works abnormally.
Further, the motor control circuit includes: a control switch;
the control end of the control switch is connected with the main control circuit, and the first end of the control switch and the second end of the control switch are connected in series on a power supply path of the motor;
the main control circuit is used for generating a control signal when judging that the battery works abnormally;
the control switch is used for cutting off the first end of the control switch and the second end of the control switch when receiving the control signal, so that the running of the motor is stopped.
The utility model provides a pair of electric toothbrush, include: the electric toothbrush is provided with the battery voltage detection system according to any one of the above embodiments.
The utility model provides a battery voltage detecting system and electric toothbrush can be through the circuit structure who sets up: the device comprises a main control circuit, a first detection circuit, a second detection circuit and a standard voltage conversion circuit; the input end of the standard voltage conversion circuit is connected with one end of a second detection circuit, and the other end of the second detection circuit is connected to the main control circuit; the output end of the standard voltage conversion circuit is connected with one end of the first detection circuit; the other end of the first detection circuit is connected to the main control circuit; the standard voltage conversion circuit is used for connecting the battery at the input end side and converting the discharge voltage of the battery into a standard voltage; the first detection circuit is used for detecting a first voltage at the output end side of the standard voltage conversion circuit; the second detection circuit is used for detecting a second voltage at the input end side of the standard voltage conversion circuit; main control circuit obtains battery discharge voltage according to first voltage and second voltage, the utility model discloses need not to acquire reference voltage from the outside, just can obtain the actual discharge voltage of battery to alleviate a plurality of electrical equipment that exist among the prior art and not set up reference basis voltage in advance and lead to the technical problem of monitoring battery discharge voltage difficulty.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a structural diagram of a battery voltage detection system according to an embodiment of the present invention;
fig. 2 is another structural diagram of a battery voltage detection system according to an embodiment of the present invention;
fig. 3 is a circuit structure diagram of a main control circuit provided in an embodiment of the present invention;
fig. 4 is a circuit structure diagram of a first detection circuit according to an embodiment of the present invention;
fig. 5 is a circuit structure diagram of a second detection circuit according to an embodiment of the present invention;
fig. 6 is a circuit structure diagram of a standard voltage conversion circuit according to an embodiment of the present invention;
fig. 7 is a circuit structure diagram of a display control circuit according to an embodiment of the present invention;
fig. 8 is a circuit structure diagram of a discharge management circuit according to an embodiment of the present invention;
fig. 9 is a circuit structure diagram of a motor control circuit provided in the embodiment of the present invention.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
At present, battery discharge voltage real-time monitoring is also increasingly in demand, however, reference base voltage is not set in advance for a plurality of existing electric devices, and meanwhile, for a microcontroller without an internal reference voltage, reference base voltage is set, and the whole monitoring system or the microcontroller may need to be replaced, so that the realization is troublesome. Based on this, the utility model provides a battery voltage detection system and electric toothbrush to alleviate a plurality of electric equipment that exist among the prior art and not set up reference basis voltage in advance and lead to monitoring the technical problem of battery discharge voltage difficulty.
The following detailed description is made with reference to the accompanying drawings:
referring to fig. 1, there is shown a block diagram of a battery voltage detection system including: a main control circuit 110, a first detection circuit 120, a second detection circuit 130, and a standard voltage conversion circuit 140;
the input end of the standard voltage conversion circuit 140 is connected to one end of the second detection circuit 130, and the other end of the second detection circuit 130 is connected to the main control circuit 110; the output end of the standard voltage conversion circuit 140 is connected to one end of the first detection circuit 120; the other end of the first detection circuit 120 is connected to the main control circuit 110;
the standard voltage conversion circuit 140 is connected to a battery on an input end side, and converts a discharge voltage of the battery into a standard voltage. The voltage in the battery can then enter the standard voltage conversion circuit 140 for voltage conversion.
The first detection circuit 120 is configured to detect a first voltage at an output terminal side of the standard voltage conversion circuit; wherein the first voltage is a voltage related to a discharge voltage of the battery.
The second detection circuit 130 is used for detecting a second voltage at the input end side of the standard voltage conversion circuit; wherein the second voltage is a voltage related to the standard voltage.
The main control circuit 110 is configured to obtain a battery discharge voltage according to the first voltage and the second voltage. Therefore, the actual discharge voltage of the battery can be obtained according to the first voltage and the second voltage detected by the first detection circuit and the second detection circuit, the actual discharge voltage of the battery can be obtained without acquiring a reference voltage from the outside, the current working condition of the battery can be judged according to the discharge voltage, and corresponding measures can be taken when the battery is abnormal so as to realize the normal work of the battery.
Based on the relationship between the voltage and the resistance, for example, a way of dividing the voltage by the resistance may be adopted, that is, in some embodiments, the first detection circuit 120 includes: a first end of the first resistance circuit is connected to the output end of the standard voltage conversion circuit, a second end of the first resistance circuit is grounded, and a third end of the first resistance circuit is connected to the main control circuit;
the second detection circuit 130 includes: a first end of the second resistance circuit is connected to the input end of the standard voltage conversion circuit, a second end of the second resistance circuit is grounded, and a third end of the second resistance circuit is connected to the main control circuit;
the main control circuit is used for obtaining a battery discharge voltage according to the resistance value of the first resistance circuit, the resistance value of the second resistance circuit, the first voltage and the second voltage.
Referring to fig. 3, 4, 5, and 6, circuit diagrams of the main control circuit 110, the first detection circuit 120, the second detection circuit 130, and the standard voltage conversion circuit 140 are respectively shown;
referring to FIG. 3, the master control circuit 110 includes a controller U2, a port AD-V1 of the controller U2 is connected to a port AD-V1 of the first detection circuit 120, and a port AD-V2 of the controller U2 is connected to a port AD-V2 of the second detection circuit 130.
Referring to fig. 4, the first detection circuit 120 has a circuit structure, and the first resistance circuit includes: a first resistor R1 and a second resistor R2, a first end of the first resistor R1 is connected to the output end of the standard voltage conversion circuit, a second end of the first resistor R1 is connected in series with the second resistor R2 and grounded, and a third end of the first resistor R1 may be connected in series with a resistor R5 and connected to the main control circuit 110.
Referring to fig. 5, the circuit structure of the second detection circuit 130 includes: a third resistor R3 and a fourth resistor R4, wherein a first end of the third resistor R3 is connected to the input terminal of the standard voltage converting circuit 140, a second end of the third resistor R3 is connected in series with the fourth resistor R4 and is grounded, and a third end of the third resistor R3 can be connected in series with a resistor R6 and is connected to the main control circuit 110.
Referring to fig. 6, the circuit structure of the standard voltage converting circuit 140 includes a controller U3, a first terminal of the controller U3 is connected to the positive electrode of the battery and is grounded through a capacitor C8, a second terminal of the controller U3 is grounded, and a third terminal of the controller U3 is connected to a port (VOUT) of the first detecting circuit, is grounded through a capacitor C9, and is grounded through a capacitor C10.
In conjunction with the circuit configurations of fig. 4 and 5, the calculation process of the controller U2 may be:
the first detection circuit: the first voltage V1 is detected by dividing the voltage by the resistors R1 and R2 as follows:
V1＝V(out)*R2/(R1+R2)) (1)；
with the application microcontroller ADC module (analog to digital module) in the controller U2, it is detected that the first voltage V1 corresponds to an AD value of AD _ V1:
AD_V1＝V1*2^n/V(bat) (2)；
the second detection circuit: the voltage of V2 is detected by dividing the voltage by resistors R3 and R4 as follows:
V2＝V(bat)*R4/(R3+R4) (3)；
with the application microcontroller ADC module (analog to digital module) in the controller U2, it is detected that V2 corresponds to an AD value of AD _ V2:
AD_V2＝V2*2^n/V(bat) (4)；
in conjunction with the above four equations, the battery discharge voltage v (bat) equation can be derived as follows:
V(bat)＝V(out)*R2*(R3+R4)*AD_V2/(R4*(R1+R2)*AD_V1(5)；
when the design is that the resistance R3 is R1, and R4 is R2, the equation (5) is simplified:
V(bat)＝V(out)*AD_V2/*AD_V1 (6)；
from equation (5) or (6), and knowing the resistances R1, R2, R3, R4, the reference voltage V (out), the AD value AD _ V1 for V1, and the AD value AD _ V2 for V2, the battery discharge voltage V (bat) can be calculated.
To enable a user to be more connected to the power condition of the electric toothbrush, in some embodiments, the system further comprises: a display control circuit 150, wherein the display control circuit 150 is connected with the main control circuit 110;
the main control circuit 110 is configured to generate a battery power condition according to the battery discharge voltage, and send the battery power condition to the display control circuit 150; since the discharge voltage of the battery has a threshold, when the discharge voltage of the battery is exceeded, the battery may be overdischarged, so that when the current battery voltage is detected by the main control circuit 110, it may be determined whether the current battery voltage exceeds the threshold of the discharge voltage of the battery, if so, an electric quantity condition that the battery has no electricity is generated, and if not, an electric quantity condition that the battery has electricity is generated.
The display control circuit 150 is used for displaying the power condition. The display electric quantity condition can adopt a light-emitting diode, when the electric quantity condition is not charged, the flashing display can be carried out, and when the electric quantity condition is charged, the long-bright display can be carried out.
As an example, referring to fig. 7, a display control circuit is shown, the display control circuit includes two LED lamps, one LED lamp can display the power status, the other LED lamp can display the display status of each mode of the electric toothbrush in addition to the power status, and the number of the light emitting diodes can be determined according to the display status.
Of course, the display control circuit may also include a display that may display the value of a particular battery discharge circuit.
In the system, the power supplier can supply power to the circuit structure, such as the main control circuit, except for the case of adopting an external battery or an external power supply. As shown in connection with fig. 2, a battery 160 may also be included in the system; the battery 160 is connected to the main control circuit 110;
the battery 160 is used to supply power to the main control circuit 110.
In some embodiments, as shown in connection with fig. 2, the system further comprises: a discharge management circuit 170, wherein the discharge management circuit 170 is connected to the battery 160, and the discharge management circuit 170 is used for protecting the battery.
As shown in fig. 8, the discharge management circuit includes: the battery protection circuit comprises a controller U1, a resistor R1 and a capacitor C1, wherein a first end (VDD end) of the controller U1 is connected with the anode of a battery through the resistor R1, a second end (GND end) of the controller U1 is connected with the cathode of the battery, a third end (VM end) of the controller U1 is grounded, and after the discharge management circuit 170 detects that the discharge voltage of the battery exceeds the minimum battery voltage or the abnormal operation of the battery such as circuit short circuit is found, the first end of the controller and the third end of the controller are cut off so that the battery can stop operating, and therefore the purpose of hardware protection can be achieved.
In some embodiments, the system further comprises: a motor control circuit 180;
the motor control circuit 180 is respectively connected with the main control circuit 110 and a power supply path of the motor; the power supply circuit of the motor comprises a circuit consisting of the motor and a battery; the main control circuit 110 is configured to determine a battery condition according to a battery discharge voltage, and cut off a power supply path of the motor through the motor control circuit 180 to stop the operation of the motor when it is determined that the battery is not working normally.
As shown in connection with fig. 9, the motor control circuit 180 includes a control switch Q1;
the control end of the control switch Q1 is connected to the main control circuit 110, and the first end of the control switch Q1 and the second end of the control switch are connected in series to a power supply path of the motor, wherein the power supply path of the motor may be a power supply path of a battery-connected motor-grounded motor, that is, the first end of the control switch Q1 is connected in series to the motor and connected to the battery, and the second end of the control switch Q1 is connected to the ground;
the main control circuit 110 is configured to generate a start signal when determining that the battery is working normally;
the control switch Q1 is used for conducting the first terminal of the control switch Q1 and the second terminal of the control switch Q1 when receiving the start signal, so as to operate the motor M.
The main control circuit 110 is configured to generate a control signal when the battery is judged to be abnormally operated;
the control switch Q1 is used for cutting off the first end of the control switch Q1 and the second end of the control switch Q1 when receiving the control signal, so as to stop the operation of the motor.
The present embodiments also include a power toothbrush comprising: the electric toothbrush is provided with the battery voltage detection system according to any one of the above embodiments.
The utility model provides an electric toothbrush, owing to include any one of above-mentioned embodiment battery voltage detection system, so, can be used for detecting the first voltage of standard voltage conversion circuit's output terminal side through the first detection circuitry among the battery voltage detection system, second detection circuitry is used for detecting the second voltage of standard voltage conversion circuit's input terminal side, master control circuit need not to acquire reference voltage from the outside, according to first voltage and second voltage, obtains battery discharge voltage to alleviate a plurality of electric equipment that exist among the prior art and do not set up reference basis voltage in advance and lead to the technical problem of monitoring battery discharge voltage difficulty.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. A battery voltage detection system, comprising: the device comprises a main control circuit, a first detection circuit, a second detection circuit and a standard voltage conversion circuit;
the input end of the standard voltage conversion circuit is connected with one end of the second detection circuit, and the other end of the second detection circuit is connected to the main control circuit; the output end of the standard voltage conversion circuit is connected with one end of the first detection circuit; the other end of the first detection circuit is connected to the main control circuit;
the standard voltage conversion circuit is used for connecting a battery at the input end side and converting the discharge voltage of the battery into a standard voltage;
the first detection circuit is used for detecting a first voltage at the output end side of the standard voltage conversion circuit;
the second detection circuit is used for detecting a second voltage at the input end side of the standard voltage conversion circuit;
the main control circuit is used for obtaining a battery discharge voltage according to the first voltage and the second voltage.
2. The battery voltage detection system according to claim 1,
the first detection circuit includes: a first end of the first resistance circuit is connected to the output end of the standard voltage conversion circuit, a second end of the first resistance circuit is grounded, and a third end of the first resistance circuit is connected to the main control circuit;
the second detection circuit includes: a first end of the second resistance circuit is connected to the input end of the standard voltage conversion circuit, a second end of the second resistance circuit is grounded, and a third end of the second resistance circuit is connected to the main control circuit;
the main control circuit is used for obtaining a battery discharge voltage according to the resistance value of the first resistance circuit, the resistance value of the second resistance circuit, the first voltage and the second voltage.
3. The battery voltage detection system according to claim 2, wherein the first resistance circuit includes: the first end of the first resistor is connected to the output end of the standard voltage conversion circuit, the second end of the first resistor is connected in series with the second resistor to be grounded, and the third end of the first resistor is connected with the main control circuit.
4. The battery voltage detection system according to claim 2, wherein the second resistance circuit includes: the first end of the third resistor is connected to the input end of the standard voltage conversion circuit, the second end of the third resistor is connected in series with the fourth resistor and is grounded, and the third end of the third resistor is connected with the main control circuit.
5. The battery voltage detection system according to claim 1, characterized in that the system further comprises: the display control circuit is connected with the main control circuit;
the main control circuit is used for generating the battery electric quantity condition according to the battery discharge voltage and sending the battery electric quantity condition to the display control circuit;
the display control circuit is used for displaying the battery power condition.
6. The battery voltage detection system according to claim 1, characterized in that the system further comprises: and the discharge management circuit is connected with the battery and is used for protecting the battery.
7. The battery voltage detection system of claim 6, wherein the discharge management circuit comprises a controller;
the first end of the controller is connected with the anode of the battery, the second end of the controller is connected with the cathode of the battery, and the third end of the controller is grounded;
the controller is used for cutting off the first end of the controller and the third end of the controller when detecting that the battery works abnormally, so that the battery can stop working.
8. The battery voltage detection system according to claim 1, characterized in that the system further comprises: a control circuit of the motor is provided,
the motor control circuit is respectively connected with the main control circuit and a power supply path of the motor; the power supply circuit of the motor comprises a circuit consisting of the motor and a battery;
the main control circuit is used for judging the condition of the battery according to the discharge voltage of the battery, and cutting off a power supply path of the motor through the motor control circuit to stop the operation of the motor when judging that the battery works abnormally.
9. The battery voltage detection system according to claim 8, wherein the motor control circuit includes: a control switch;
the control end of the control switch is connected with the main control circuit, and the first end of the control switch and the second end of the control switch are connected in series on a power supply path of the motor;
the main control circuit is used for generating a control signal when judging that the battery works abnormally;
the control switch is used for cutting off the first end of the control switch and the second end of the control switch when receiving the control signal, so that the running of the motor is stopped.
10. An electric toothbrush, comprising: the electric toothbrush is provided with the battery voltage detection system according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921301945.1U CN210894626U (en) | 2019-08-08 | 2019-08-08 | Battery voltage detection system and electric toothbrush |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921301945.1U CN210894626U (en) | 2019-08-08 | 2019-08-08 | Battery voltage detection system and electric toothbrush |
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| CN210894626U true CN210894626U (en) | 2020-06-30 |
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| CN201921301945.1U Active CN210894626U (en) | 2019-08-08 | 2019-08-08 | Battery voltage detection system and electric toothbrush |
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