CN220628913U - Charging detection circuit and electronic equipment - Google Patents
Charging detection circuit and electronic equipment Download PDFInfo
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- CN220628913U CN220628913U CN202322173691.2U CN202322173691U CN220628913U CN 220628913 U CN220628913 U CN 220628913U CN 202322173691 U CN202322173691 U CN 202322173691U CN 220628913 U CN220628913 U CN 220628913U
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- 238000001514 detection method Methods 0.000 title claims abstract description 58
- 239000003990 capacitor Substances 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 14
- 229910052744 lithium Inorganic materials 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 150000002642 lithium compounds Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model relates to the field of battery charging, in particular to a charging detection circuit and electronic equipment. The charging detection circuit comprises an acquisition module, a judging module and a control module. One end of the acquisition module is connected with the battery charging loop, the other end of the acquisition module is connected with the first end of the judgment module, and the second end of the judgment module is connected with the control module; the acquisition module acquires a first voltage signal of the battery charging loop and outputs the first voltage signal to the judging module; the judging module receives the first voltage signal, generates a second voltage signal when the first voltage signal is higher than a preset voltage value, and transmits the second voltage signal to the control module; and when the control module receives the second voltage signal, determining that the charger is connected into the battery charging loop. The voltage signal of the battery charging loop is collected through the collecting module, and whether the charger is connected into the battery charging loop is confirmed through the control module. The problem that the charger cannot be identified at the charging tail end so that the battery is not fully charged is solved.
Description
Technical Field
The present utility model relates to the field of battery charging, and in particular, to a charging detection circuit and an electronic device.
Background
The lithium battery is a battery taking lithium metal or lithium compound as a positive electrode material, has the advantages of high working voltage, high specific energy, long cycle life and the like, has very wide application fields, and is mainly applied to electronic equipment such as digital products, mobile phones, mobile power supplies, notebooks and the like.
However, in the charging process of the lithium battery, some old batteries have no charging detection function, whether an external charger is connected or not cannot be identified, and some types of detection functions are imperfect, and the charger cannot be identified at the charging end, so that the battery is not fully charged.
The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present utility model and is not intended to represent an admission that the foregoing is prior art.
Disclosure of Invention
The utility model mainly aims to provide a charging detection circuit and electronic equipment, and aims to solve the problem that a charger cannot be identified at the charging end in the prior art, so that a battery is not fully charged.
In order to achieve the above object, the present utility model provides a charge detection circuit including: the device comprises an acquisition module, a judging module and a control module; one end of the acquisition module is connected with the battery charging loop, the other end of the acquisition module is connected with the first end of the judgment module, and the second end of the judgment module is connected with the control module;
the acquisition module is used for acquiring a first voltage signal of the battery charging loop and outputting the first voltage signal to the judging module;
the judging module is used for receiving the first voltage signal, generating a second voltage signal when the first voltage signal is higher than a preset voltage value, and transmitting the second voltage signal to the control module;
and the control module is used for determining that the charger is connected to the battery charging loop when the second voltage signal is received.
Optionally, the acquisition module is: a first diode and a capacitor;
the cathode of the first diode is connected with the battery charging loop and the judging module at the same time, the anode of the first diode is grounded, and the capacitor is connected with the first diode in parallel.
Optionally, the first diode is: a zener diode.
Optionally, the judging module includes: a switching tube and a first resistor;
the control end of the switching tube is connected with the cathode of the first diode, the input end of the switching tube is connected with the first end of the first resistor and the control module at the same time, the output end of the switching tube is grounded, and the second end of the first resistor is connected with a power supply.
Optionally, the control module includes: an MCU chip;
and an input pin of the MCU chip is connected with the first end of the first resistor and the input end of the switching tube at the same time.
Optionally, the charge detection circuit further includes: a voltage dividing module;
the voltage dividing module is arranged between the battery charging loop and the acquisition module;
the voltage dividing module is used for setting the voltage value of the first voltage signal acquired by the acquisition module.
Optionally, the voltage dividing module includes: a second resistor and a third resistor;
the first end of the second resistor is connected with the battery charging loop, the second end of the second resistor is connected with the first end of the third resistor and the cathode of the first diode, and the second end of the third resistor is grounded.
Optionally, the charge detection circuit further includes: a rectifying module;
the rectification module is arranged between the battery charging loop and the voltage dividing module;
the rectification module is used for rectifying the first voltage signal when receiving the first voltage signal, and outputting the rectified direct current signal to the voltage division module.
Optionally, the rectifying module includes: a second diode and a fourth resistor;
the anode of the second diode is connected with the battery charging loop, the cathode of the second diode is connected with the first end of the fourth resistor, and the second end of the fourth resistor is connected with the first end of the second resistor.
In addition, to achieve the above object, the present utility model also provides a charge detection electronic device including: the charge detection circuit described above.
According to the technical scheme, the charging detection circuit and the electronic device are provided, and the charging detection circuit comprises an acquisition module, a judging module and a control module. One end of the acquisition module is connected with the battery charging loop, the other end of the acquisition module is connected with the first end of the judgment module, and the second end of the judgment module is connected with the control module; the acquisition module acquires a first voltage signal of the battery charging loop and outputs the first voltage signal to the judging module; the judging module receives the first voltage signal, generates a second voltage signal when the first voltage signal is higher than a preset voltage value, and transmits the second voltage signal to the control module; and when the control module receives the second voltage signal, the control module determines that the charger is connected into the battery charging loop. The voltage signal of the battery charging loop is collected through the collecting module, the collected voltage signal is compared with a preset voltage value through the judging module, and whether the charger is connected into the battery charging loop is confirmed through the control module. The problem that in the prior art, a charger cannot be identified at the charging tail end, so that the battery is not fully charged is solved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a functional block diagram of a first embodiment of a charge detection circuit according to the present utility model;
FIG. 2 is a circuit configuration diagram of a conventional detection circuit in the prior art;
FIG. 3 is a circuit diagram of a second embodiment of the charge detection circuit of the present utility model;
FIG. 4 is a functional block diagram of a third embodiment of a charge detection circuit according to the present utility model;
FIG. 5 is a circuit configuration diagram of a third embodiment of the charge detection circuit of the present utility model;
FIG. 6 is a functional block diagram of a charge detection electronic device according to the present utility model;
fig. 7 is a circuit configuration diagram of the charge detection electronic device of the present utility model.
Reference numerals illustrate:
| reference numerals | Name of the name | Reference numerals | Name of the name |
| R1～R4 | First to fourth resistors | CHGER | Control interface |
| D1、D2 | First and second diodes | 10 | Acquisition module |
| Q1 | Switch tube | 20 | Judgment module |
| C1 | Capacitance device | 30 | Control module |
| MCU | Micro control unit | 40 | Battery charging circuit |
| VCC | Power supply | 50 | Voltage dividing module |
| C- | Charger negative electrode | 60 | Rectifying module |
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the technical solutions should be considered that the combination does not exist and is not within the scope of protection claimed by the present utility model.
Referring to fig. 1, fig. 1 is a functional block diagram of a first embodiment of a charge detection circuit according to the present utility model. The present utility model proposes a first embodiment of a charge detection circuit.
In this embodiment, the charge detection circuit includes: the device comprises an acquisition module 10, a judging module 20 and a control module 30, wherein one end of the acquisition module 10 is connected with a battery charging loop 40, the other end of the acquisition module is connected with a first end of the judging module 20, and a second end of the judging module 20 is connected with the control module 30;
the battery charging circuit 40 is a circuit for charging the battery by the charger; the collection module 10 is disposed between the negative electrode of the charger and the negative electrode of the battery, and when the charger is connected to the battery charging circuit 40, a potential difference is generated due to the voltage difference between the charger and the battery.
In a specific implementation, the collecting module 10 collects a first voltage signal of the battery charging circuit 40 and outputs the first voltage signal to the judging module 20, the judging module 20 receives the first voltage signal, generates a second voltage signal when the first voltage signal is higher than a preset voltage value, and transmits the second voltage signal to the control module 30; the control module 30, upon receiving the second voltage signal, determines that the charger is connected to the battery charging circuit 40.
The first voltage signal may be a potential difference generated when the charger is connected to the battery charging circuit 40 under the condition that the battery is not fully charged, because the voltage of the charger is higher than the voltage of the battery. The preset voltage value may be a fixed voltage value preset in the judging module 20, and when the first voltage signal acquired by the acquiring module 10 is greater than the fixed voltage value, the judging module 20 generates a second voltage signal and transmits the second voltage signal to the control module 30.
It should be understood that referring to fig. 2, fig. 2 is a circuit configuration diagram of a conventional detection circuit in the prior art. In the prior art, an emitter electrode of an N-type triode is connected with a battery charging loop, a base electrode of the N-type triode is connected with a power supply, a collector electrode of the N-type triode is connected with a base electrode of a P-type triode, a collector electrode of the P-type triode is connected with a controller, and an emitter electrode of the P-type triode is connected with the power supply. When the charger is connected to the battery to be charged, the voltage of the initial charger and the potential difference of the battery to be charged are large, the N-type triode is cut off, the P-type triode is conducted, the controller detects that the charger is connected, when the battery to be charged is full (namely at the charging tail end), the voltage of the initial charger and the potential difference of the battery to be charged are small, the N-type triode is conducted, the P-type triode is cut off, the controller cannot detect that the charger is connected, and a charging loop of the charger and the battery to be charged can be disconnected.
In this embodiment, the acquisition module 10 is used to acquire a first voltage signal of the battery charging circuit 40, and output the first voltage signal to the determination module 20; the judging module 20 receives the first voltage signal, generates a second voltage signal when the first voltage signal is higher than a preset voltage value, and transmits the second voltage signal to the control module 30; the control module 30, upon receiving the second voltage signal, determines that a charger is connected to the battery charging circuit 40. The voltage signal of the battery charging circuit 40 is collected by the collecting module 10, the collected voltage signal is compared with a preset voltage value by the judging module 20, and whether the charger is connected to the battery charging circuit is confirmed by the control module 30. The problem that in the prior art, a charger cannot be identified at the charging tail end, so that the battery is not fully charged is solved.
Referring to fig. 3, fig. 3 is a circuit configuration diagram of a second embodiment of the charge detection circuit according to the present utility model. A second embodiment of the charge detection circuit of the present utility model is presented based on the first embodiment of the charge detection circuit described above.
In this embodiment, the acquisition module 10 includes: a first diode D1 and a capacitor C1; the cathode of the first diode D1 is connected to the battery charging circuit 40 and the judging module 20, the anode of the first diode D1 is grounded, and the capacitor C1 is connected in parallel with the first diode D1.
The first diode D1 may be a zener diode, and a PN junction formed by combining a P-type semiconductor and an N-type semiconductor of the diode forms a depletion layer having reverse ions. The zener diode has high doping level and thin depletion layer, can conduct electricity under both forward and reverse bias voltages, and can reach a constant voltage (zener voltage) area under the reverse bias condition, and the zener diode is irrelevant to the current flowing through the zener diode, so that the voltage stabilizing effect is realized.
It should be understood that when the charger is connected to the battery to be charged, the voltage difference between the voltage of the initial charger and the battery to be charged is larger, that is, the first voltage signal is larger, and the first diode D1 is in a reverse bias state, so that the first voltage signal is clamped at a stable voltage value, and the capacitor C1 is charged. When the battery to be charged is full (i.e. at the charging end), the potential difference between the voltage of the initial charger and the battery to be charged is small, i.e. the first voltage signal is small, and the capacitor C1 is discharged, so that the first voltage signal can still be maintained at a stable voltage value for a period of time.
Further, the judging module 20 includes: a switching tube Q1 and a first resistor R1; the control end of the switching tube Q1 is connected with the cathode of the first diode D1, the input end of the switching tube Q1 is simultaneously connected with the first end of the first resistor R1 and the control module 30, the output end of the switching tube Q1 is grounded, and the second end of the first resistor R1 is connected with a power supply.
It should be noted that, the switching transistor Q1 may be an NPN transistor, and when the first voltage signal exceeds the turn-on voltage of the base and the emitter of the NPN transistor, the NPN transistor is turned on. And when the first voltage signal is smaller than the conducting voltage of the base electrode and the emitter electrode of the NPN type transistor, the NPN type transistor is cut off.
It should be understood that when the first voltage signal received by the control terminal of the switching tube Q1 exceeds the turn-on voltage, the switching tube Q1 is turned on, the power supply current passes through the first resistor R1, the collector of the switching tube Q1, and the emitter of the switching tube Q1 to ground, and the second voltage signal transmitted to the control module 30 is a low level signal. When the first voltage signal received by the control end of the switching tube Q1 is lower than the on voltage, the switching tube Q1 is turned off, the power supply current directly passes through the first resistor R1 and then directly reaches the control module 30, and the second voltage signal transmitted to the control module 30 is a high level signal.
Further, the control module 30 includes: an MCU chip; the input pin of the MCU chip is connected with the first end of the first resistor R1 and the input end of the switching tube Q1 at the same time.
It should be noted that, when the second voltage signal is received at a low level, the MCU chip determines that a charger is connected to the battery charging circuit 40, and when the second voltage signal is received at a high level, it determines that no charger is connected to the battery charging circuit 40.
It should be understood that the MCU chip may also turn on the circuit for charging the battery by the charger when it is confirmed that the charger is connected to the battery charging circuit 40, and turn off the circuit for charging the battery by the charger when it is confirmed that no charger is connected to the battery charging circuit 40.
In the second embodiment, the first diode D1 and the capacitor C1 are used to collect the first voltage signal of the battery charging circuit 40 and transmit the first voltage signal to the control end of the switching tube Q1, so as to control the on and off of the switching tube Q1 to generate a second voltage signal and transmit the second voltage signal to the input pin of the MCU chip, and the MCU chip confirms whether the charger is connected. And a stable first voltage signal is acquired through the clamping voltage of the reverse bias of the zener diode and the energy storage principle of the capacitor, when the first voltage signal exceeds the conducting voltage of the switching tube Q1, the switching tube Q1 is conducted, and a second voltage signal transmitted to the control module 30 is a low-level signal. When the first voltage signal is lower than the on voltage of the switching tube Q1, the switching tube Q1 is turned off, and the second voltage signal transmitted to the control module 30 is a high level signal. The problem of among the prior art voltage of charger and wait to charge the potential difference of battery less, the switch tube can't discern the charger for the battery charging is not full is solved.
Referring to fig. 4 and 5, fig. 4 is a functional block diagram of a third embodiment of the charge detection circuit of the present utility model, and fig. 5 is a circuit configuration diagram of the third embodiment of the charge detection circuit of the present utility model. A third embodiment of the charge detection circuit of the present utility model is proposed based on the embodiment of the charge detection circuit described above.
In this embodiment, the charge detection circuit further includes: a voltage dividing module 50; the voltage dividing module 50 is disposed between the battery charging circuit and the acquisition module.
It should be noted that the voltage dividing module 50 is configured to set a voltage value of the first voltage signal acquired by the acquisition module 10.
It will be appreciated that the constant voltage (zener voltage) region of the zener diode in the reverse biased state is limited and if the reverse bias voltage is too high, the normal function of the diode may be permanently impaired (avalanche breakdown). The voltage dividing module 50 is required to adjust the voltage value of the first voltage signal collected by the zener diode.
Further, the voltage dividing module 50 includes: the first end of the second resistor R2 is connected with the battery charging loop 40, the second end of the second resistor R2 is simultaneously connected with the first end of the third resistor R3 and the cathode of the first diode D1, and the second end of the third resistor R3 is grounded.
The voltage across the first diode D1 is the voltage division of the potential difference in the battery charging circuit 40 across the resistor R3.
Further, the charge detection circuit further includes: a rectifying module 60; the rectifying module 60 is disposed between the battery charging circuit 40 and the voltage dividing module 50;
when the rectification module 60 receives the first voltage signal, it may rectify the first voltage signal and output the rectified dc signal to the voltage dividing module 50.
Further, the rectifying module 60 includes: a second diode D2 and a fourth resistor R4; the anode of the second diode D2 is connected to the battery charging circuit 40, the cathode is connected to the first end of the fourth resistor R4, and the second end of the fourth resistor R4 is connected to the first end of the second resistor R2.
The second diode D2 is turned on when the forward voltage is greater than the PN junction threshold voltage, and the second diode D2 is turned off when the forward voltage is less than the PN junction threshold voltage.
In this embodiment, the voltage dividing module 50 and the rectifying module 60 enable the first voltage signal collected by the collecting module 10 to be a direct current signal maintained within a set range, so that the stability of the operation of the charging detection circuit is ensured when the charger is connected to the battery charging circuit 40, and the service life of the circuit can be prolonged.
In addition, the embodiment of the utility model also provides charge detection electronic equipment, which comprises the charge detection circuit. Referring to fig. 6 and 7, fig. 6 is a functional block diagram of the charge detection electronic device according to the present utility model; fig. 7 is a circuit configuration diagram of a charge detection electronic device according to the present utility model.
Because the charging detection electronic device adopts all the technical schemes of all the embodiments, the charging detection electronic device at least has all the beneficial effects brought by the technical schemes of the embodiments, and the charging detection electronic device is not described in detail herein.
The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.
Claims (10)
1. A charge detection circuit, characterized in that the charge detection circuit comprises: the device comprises an acquisition module, a judging module and a control module;
one end of the acquisition module is connected with the battery charging loop, the other end of the acquisition module is connected with the first end of the judgment module, and the second end of the judgment module is connected with the control module;
the acquisition module is used for acquiring a first voltage signal of the battery charging loop and outputting the first voltage signal to the judging module;
the judging module is used for receiving the first voltage signal, generating a second voltage signal when the first voltage signal is higher than a preset voltage value, and transmitting the second voltage signal to the control module;
and the control module is used for determining that the charger is connected to the battery charging loop when the second voltage signal is received.
2. The charge detection circuit of claim 1, wherein the acquisition module comprises: a first diode and a capacitor;
the cathode of the first diode is connected with the battery charging loop and the judging module at the same time, the anode of the first diode is grounded, and the capacitor is connected with the first diode in parallel.
3. The charge detection circuit of claim 2, wherein the first diode is: a zener diode.
4. The charge detection circuit of claim 2, wherein the determination module comprises: a switching tube and a first resistor;
the control end of the switching tube is connected with the cathode of the first diode, the input end of the switching tube is connected with the first end of the first resistor and the control module at the same time, the output end of the switching tube is grounded, and the second end of the first resistor is connected with a power supply.
5. The charge detection circuit of claim 4, wherein the control module comprises: an MCU chip;
and an input pin of the MCU chip is connected with the first end of the first resistor and the input end of the switching tube at the same time.
6. The charge detection circuit of claim 5, wherein the charge detection circuit further comprises: a voltage dividing module;
the voltage dividing module is arranged between the battery charging loop and the acquisition module;
the voltage dividing module is used for setting the voltage value of the first voltage signal acquired by the acquisition module.
7. The charge detection circuit of claim 6, wherein the voltage divider module comprises: a second resistor and a third resistor;
the first end of the second resistor is connected with the battery charging loop, the second end of the second resistor is connected with the first end of the third resistor and the cathode of the first diode, and the second end of the third resistor is grounded.
8. The charge detection circuit of claim 7, wherein the charge detection circuit further comprises: a rectifying module;
the rectification module is arranged between the battery charging loop and the voltage dividing module;
the rectification module is used for rectifying the first voltage signal when receiving the first voltage signal, and outputting the rectified direct current signal to the voltage division module.
9. The charge detection circuit of claim 8, wherein the rectification module comprises: a second diode and a fourth resistor;
the anode of the second diode is connected with the battery charging loop, the cathode of the second diode is connected with the first end of the fourth resistor, and the second end of the fourth resistor is connected with the first end of the second resistor.
10. A charge detection electronic device, characterized in that the charge detection electronic device comprises: the charge detection circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322173691.2U CN220628913U (en) | 2023-08-11 | 2023-08-11 | Charging detection circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322173691.2U CN220628913U (en) | 2023-08-11 | 2023-08-11 | Charging detection circuit and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220628913U true CN220628913U (en) | 2024-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322173691.2U Active CN220628913U (en) | 2023-08-11 | 2023-08-11 | Charging detection circuit and electronic equipment |
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| Country | Link |
|---|---|
| CN (1) | CN220628913U (en) |
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2023
- 2023-08-11 CN CN202322173691.2U patent/CN220628913U/en active Active
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