CN216560798U - Low-loss charging and discharging detection circuit - Google Patents
Low-loss charging and discharging detection circuit Download PDFInfo
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- CN216560798U CN216560798U CN202122196607.XU CN202122196607U CN216560798U CN 216560798 U CN216560798 U CN 216560798U CN 202122196607 U CN202122196607 U CN 202122196607U CN 216560798 U CN216560798 U CN 216560798U
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Abstract
The utility model discloses a low-loss charging and discharging detection circuit, which comprises: the MCU control detection circuit unit comprises a voltage-stabilizing power supply module and an MCU control chip; the charging and charging detection trigger circuit unit comprises a charging control circuit unit, a load, a fuse, a battery, a resistor R7, a resistor R3, an MOS (metal oxide semiconductor) tube and a first triode, wherein the resistor R7 is connected with the resistor R8 and then is connected with the charging control circuit unit and the load, the S pole and the D pole of the MOS tube are respectively connected with two ends of a resistor R7, and the G pole of the MOS tube is connected with an MCU (microprogrammed control Unit) control chip; the C pole of the first triode is connected with the voltage-stabilizing power supply module after being connected with the resistor R1, and the C pole of the first triode is connected with the MCU control chip; the discharging and discharging detection trigger circuit unit comprises a battery, a fuse, a load, a resistor R7, a second triode, an MOS (metal oxide semiconductor) tube and a resistor R8, wherein the E pole of the second triode is connected with the resistor R7 and the negative pole of the battery; the C pole of the second triode is connected with the MCU control chip after being connected with the resistor R4.
Description
The technical field is as follows:
the utility model relates to the technical field of electronics, in particular to a low-loss charging and discharging detection circuit.
Background art:
although the product in the prior art also has a charge-discharge detection circuit, the detection sensitivity is low, and the detection power consumption is high.
In view of the above, the present inventors propose the following.
The utility model has the following contents:
the utility model aims to overcome the defects of the prior art and provide a low-loss charge-discharge detection circuit.
In order to solve the technical problems, the utility model adopts the following technical scheme: the low-loss charge-discharge detection circuit includes: the MCU control detection circuit unit comprises a voltage-stabilizing power supply module and an MCU control chip electrically connected with the voltage-stabilizing power supply module; the charging and charging detection trigger circuit unit comprises a charging control circuit unit, a load and a fuse which are connected with the output end of the charging control circuit unit, a battery with the positive electrode connected with the fuse, a resistor R7 and a resistor R3 which are connected with the negative electrode of the battery, an MOS (metal oxide semiconductor) tube connected with a resistor R7, and a first triode connected with a resistor R3, wherein the resistor R7 is connected with the charging control circuit unit and the load after being connected with a resistor R8, the S electrode and the D electrode of the MOS tube are respectively connected with two ends of the resistor R7, the S electrode of the MOS tube is also connected with the negative electrode of the battery, and the G electrode of the MOS tube is connected with an MCU (microprogrammed control unit); the C pole of the first triode is connected with the voltage-stabilizing power supply module after being connected with the resistor R1, the C pole of the first triode is also connected with a charge _ det port of the MCU control chip, and the E pole of the first triode is connected with a connecting wire between the resistor R7 and the resistor R8; the discharging and discharging detection trigger circuit unit comprises a battery, a fuse connected with the anode of the battery, a load connected with the fuse, a resistor R7 and a second triode connected with the cathode of the battery, a MOS (metal oxide semiconductor) transistor connected with a resistor R7 and a resistor R8, wherein the E pole of the second triode is connected with the resistor R7 and the cathode of the battery, and the B pole of the second triode is connected with the resistor R6 and then connected with a connecting wire between the resistor R7 and the resistor R8; and the C pole of the second triode is connected with a resistor R4 and then is connected with a discharge _ det port of the MCU control chip.
Further, in the above technical solution, the charging control circuit unit is a USB 5V charging circuit, and the USB 5V charging circuit has a USB interface and a Vin end; the output end of the charging control circuit unit is connected with an 8.4V end, and the 8.4V end.
Further, in the above technical solution, the USB interface is further connected to a protection diode ZD2, and the model number of the protection diode ZD2 is P1CH 13A.
Further, in the above technical solution, the voltage-stabilizing power supply module includes a voltage-stabilizing chip, a VDD terminal connected to an output terminal of the voltage-stabilizing chip, a capacitor C5, and a capacitor C6, where the capacitor C4, the capacitor C5, and the capacitor C6 are all grounded, and an input terminal of the voltage-stabilizing chip is connected to the Vin terminal, the 8.4V terminal, and the capacitor C7.
Further, in the above technical solution, a diode D1 is further connected between the resistor R4 and the discharge _ det port; the resistor R4 is also connected to a diode D2 and then to a connection line between the resistor R7 and the resistor R8.
Further, in the above technical solution, the types of the diode D1 and the diode D2 are BAT16 TS.
Further, in the above technical solution, two ends of the resistor R8 are further connected in parallel with a resistor R5, and the resistor R5 is further connected to the MCU control chip.
After adopting the technical scheme, compared with the prior art, the utility model has the following beneficial effects:
the charging detection and the discharging detection have the characteristics of high precision, strong anti-interference and low detection power consumption, and the charging and charging detection trigger circuit unit and the discharging and discharging detection trigger circuit unit share a plurality of electronic components, so that the circuit layout of the utility model is simpler and the cost is lower.
Description of the drawings:
fig. 1 is a circuit diagram of the present invention.
The specific implementation mode is as follows:
the utility model is further illustrated below with reference to specific embodiments and the accompanying drawings.
Referring to fig. 1, a low-loss charge-discharge detection circuit includes: the charging and discharging detection circuit comprises an MCU control detection circuit unit 1, a charging and charging detection trigger circuit unit 2 and a discharging and discharging detection trigger circuit unit 3, wherein the charging and charging detection trigger circuit unit 2 and the discharging and discharging detection trigger circuit unit 3 are electrically connected with the MCU control detection circuit unit 1.
The MCU control detection circuit unit 1 comprises a voltage-stabilizing power supply module 11 and an MCU control chip 12 electrically connected with the voltage-stabilizing power supply module 11.
The voltage-stabilizing power supply module 11 comprises a voltage-stabilizing chip 111, a VDD terminal 112 connected with the output terminal of the voltage-stabilizing chip 111, a capacitor C5 and a capacitor C6, wherein the capacitor C4, the capacitor C5 and the capacitor C6 are all grounded, and the input terminal of the voltage-stabilizing chip 111 is connected with a Vin terminal 212, an 8.4V terminal 213 and a capacitor C7.
The charging and charging detection trigger circuit unit 2 comprises a charging control circuit unit 21, a load 22 and a fuse 23 connected with the output end of the charging control circuit unit 21, a battery 24 with the positive electrode connected with the fuse 23, a resistor R7 and a resistor R3 connected with the negative electrode of the battery 24, an MOS (metal oxide semiconductor) tube 25 connected with a resistor R7, and a first triode 26 connected with the resistor R3, wherein the resistor R7 is also connected with the resistor R8 and then connected with the charging control circuit unit 21 and the load 22, the S pole and the D pole of the MOS tube 25 are respectively connected with two ends of the resistor R7, the S pole of the MOS tube 25 is also connected with the negative electrode of the battery 24, and the G pole of the MOS tube 25 is connected with the MCU control chip 12; the C pole of the first triode 26 is connected with the regulated power supply module 11 after being connected with the resistor R1, the C pole of the first triode 26 is also connected with the charge _ det port of the MCU control chip 12, and the E pole of the first triode 26 is connected with the connection line between the resistor R7 and the resistor R8.
The charging control circuit unit 21 is a USB 5V charging circuit, which is a prior art.
The USB 5V charging circuit is provided with a USB interface 211 and a Vin end 212; the output terminal of the charge control circuit unit 21 is connected to an 8.4V terminal 213, and the 8.4V terminal 213.
The USB interface 21 is further connected to a protection diode ZD2, and the model number of the protection diode ZD2 is P1CH13A, so that the whole charging control circuit unit 21 is safer and more reliable to use.
The discharge and discharge detection trigger circuit unit 3 comprises a battery 24, a fuse 23 connected with the positive electrode of the battery 24, a load 22 connected with the fuse 23, a resistor R7 and a second triode 31 connected with the negative electrode of the battery 24, a MOS (metal oxide semiconductor) tube 25 and a resistor R8 connected with a resistor R7, wherein the E electrode of the second triode 31 is connected with the resistor R7 and the negative electrode of the battery 24, and the B electrode of the second triode 31 is connected with a resistor R6 and then connected with a connecting wire between the resistor R7 and the resistor R8; the C pole of the second triode 31 is connected with the discharge _ det port of the MCU control chip 12 after being connected with the resistor R4.
A diode D1 is connected between the resistor R4 and the Dispharger _ det port; the resistor R4 is also connected to a diode D2 and then to a connection line between the resistor R7 and the resistor R8. The diode D1 and the diode D2 are both model numbers BAT16 TS.
The two ends of the resistor R8 are also connected with a resistor R5 in parallel, and the resistor R5 is also connected with the MCU control chip 12.
The charging state is as follows: the USB +5V is converted into a charging voltage of about 8.4V by the charging control circuit unit 21, and charges the battery 24. The current direction is from the charging control circuit unit 21 to the fuse 23, the positive electrode Vb + of the battery, the negative electrode Vb-of the battery, through the resistor R7 and the resistor R8, and then back to the GND of the charging control circuit unit 21, the current passes through the instant, the first triode 26 is conducted at the same time, the charge _ det port of the MCU control chip 12 is triggered, the MCU control chip 12 controls the MOS transistor 25 to conduct, the current passes through the MOS transistor 25, at this time, the resistor R7 is equivalent to a short circuit, no current loss occurs on the resistor R7, and the charge _ det port of the MCU control chip 12 is triggered.
And (3) discharging state: the battery 24 discharges to the load 22, the current direction is from the battery positive electrode Vb +, to the fuse 23, the load 22, through the resistor R8, the resistor R7, then return to the battery negative electrode Vb-, the current passes through the instant, at the same time, the second triode 31 is conducted, the discharge _ det port of the MCU control chip 12 is triggered, the MCU control chip 12 controls the MOS transistor 25 to conduct, the current passes through the MOS transistor 25, at this time, the resistor R7 is equivalent to a short circuit, no current loss occurs on the resistor R7, and at the same time, the discharge _ det port of the MCU control chip 12 is also triggered, and the charging detection precision is high, the anti-interference is strong, and the detection power consumption is low.
In addition, the charging and charging detection trigger circuit unit 2 and the discharging and discharging detection trigger circuit unit 3 of the present invention share the following electronic components: the battery 24, the fuse 23, the load 22, the resistor R7, the MOS transistor 25 and the resistor R8 have simpler circuit layout and lower cost.
It should be understood that the above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention, which is defined by the appended claims.
Claims (7)
1. Low-loss charge-discharge detection circuit, its characterized in that: it includes:
the MCU control detection circuit unit (1) comprises a voltage-stabilizing power supply module (11) and an MCU control chip (12) electrically connected with the voltage-stabilizing power supply module (11);
the charging and charging detection trigger circuit unit (2) comprises a charging control circuit unit (21), a load (22) and a fuse (23) which are connected with the output end of the charging control circuit unit (21), a battery (24) of which the positive electrode is connected with the fuse (23), a resistor R7 and a resistor R3 which are connected with the negative electrode of the battery (24), an MOS (MOS) tube (25) connected with a resistor R7, and a first triode (26) connected with the resistor R3, wherein the resistor R7 is connected with a resistor R8 and then connected with the charging control circuit unit (21) and the load (22), the S electrode and the D electrode of the MOS tube (25) are respectively connected with two ends of the resistor R7, the S electrode of the MOS tube (25) is also connected with the negative electrode of the battery (24), and the G electrode of the MOS tube (25) is connected with the MCU control chip (12); the C pole of the first triode (26) is connected with the voltage-stabilizing power supply module (11) after being connected with the resistor R1, the C pole of the first triode (26) is also connected with a charge _ det port of the MCU control chip (12), and the E pole of the first triode (26) is connected with a connecting wire between the resistor R7 and the resistor R8;
the discharging and discharging detection trigger circuit unit (3) comprises a battery (24), a fuse (23) connected with the positive electrode of the battery (24), a load (22) connected with the fuse (23), a resistor R7 and a second triode (31) connected with the negative electrode of the battery (24), an MOS (metal oxide semiconductor) tube (25) and a resistor R8 which are connected with a resistor R7, wherein the E electrode of the second triode (31) is connected with the resistor R7 and the negative electrode of the battery (24), and the B electrode of the second triode (31) is connected with a connecting wire between the resistor R7 and the resistor R8 after being connected with the resistor R6; and the C pole of the second triode (31) is connected with a resistor R4 and then connected with a discharge _ det port of the MCU control chip (12).
2. The low-loss charge-discharge detection circuit of claim 1, wherein: the charging control circuit unit (21) is a USB 5V charging circuit, and the USB 5V charging circuit is provided with a USB interface (211) and a Vin end (212); the output end of the charging control circuit unit (21) is connected with an 8.4V end (213), and the 8.4V end (213).
3. The low-loss charge-discharge detection circuit of claim 2, wherein: the USB interface (211) is also connected with a protection diode ZD2, and the model of the protection diode ZD2 is P1CH 13A.
4. The low-loss charge-discharge detection circuit of claim 2, wherein: the voltage-stabilizing power supply module (11) comprises a voltage-stabilizing chip (111), a VDD (voltage-VDD) end (112) connected with the output end of the voltage-stabilizing chip (111), a capacitor C5 and a capacitor C6, wherein the capacitor C4, the capacitor C5 and the capacitor C6 are all grounded, and the input end of the voltage-stabilizing chip (111) is connected with a Vin end (212), an 8.4V end (213) and a capacitor C7.
5. A low loss charge-discharge detection circuit according to any one of claims 1-4, wherein: a diode D1 is connected between the resistor R4 and the Dispharger _ det port; the resistor R4 is also connected to a diode D2 and then to a connection line between the resistor R7 and the resistor R8.
6. The low-loss charge-discharge detection circuit of claim 5, wherein: the diode D1 and the diode D2 are both model numbers BAT16 TS.
7. The low-loss charge-discharge detection circuit of claim 5, wherein: the two ends of the resistor R8 are also connected with a resistor R5 in parallel, and the resistor R5 is also connected with the MCU control chip (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122196607.XU CN216560798U (en) | 2021-09-10 | 2021-09-10 | Low-loss charging and discharging detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122196607.XU CN216560798U (en) | 2021-09-10 | 2021-09-10 | Low-loss charging and discharging detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216560798U true CN216560798U (en) | 2022-05-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122196607.XU Active CN216560798U (en) | 2021-09-10 | 2021-09-10 | Low-loss charging and discharging detection circuit |
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| Country | Link |
|---|---|
| CN (1) | CN216560798U (en) |
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2021
- 2021-09-10 CN CN202122196607.XU patent/CN216560798U/en active Active
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