CN215378433U

CN215378433U - Automatic battery protection device for dredging machine

Info

Publication number: CN215378433U
Application number: CN202122090839.7U
Authority: CN
Inventors: 郭荣良
Original assignee: Zhejiang Kaihong Electronics Co ltd
Current assignee: Zhejiang Kaihong Electronics Co ltd
Priority date: 2021-09-01
Filing date: 2021-09-01
Publication date: 2021-12-31
Anticipated expiration: 2031-09-01

Abstract

The utility model discloses an automatic battery protection device for a dredger, which comprises a microprocessor (1) connected with a dredger battery, wherein the microprocessor (1) is electrically connected with a temperature measuring unit (2), a voltage measuring unit (3), a current measuring unit (4) and a short-circuit comparator (5); a power supply voltage stabilizer (6), an indicator lamp (7), a discharge MOS tube driving unit (8) and a power loss detection unit (9) are connected between the microprocessor (1) and the dredge battery, and the power supply voltage stabilizer (6), the indicator lamp (7), the discharge MOS tube driving unit (8) and the power loss detection unit (9) are all arranged in parallel; a protective power switch (10) is arranged between the power voltage stabilizer (6) and the discharge MOS tube driving unit (8). The utility model not only can improve the protection effect, but also has the advantages of low power consumption, convenient use, simple structure, high use stability and high use safety.

Description

Automatic battery protection device for dredging machine

Technical Field

The utility model relates to a battery protection device, in particular to an automatic battery protection device for a dredger.

Background

The dredging machine is suitable for dredging a sewer or a closestool pipeline and mainly comprises a manual dredging machine and an electric dredging machine, wherein the electric dredging machine mainly utilizes a battery arranged inside to provide power so as to ensure the normal work of the dredging machine; electric type dredging machine in market, in order to guarantee its normal work, generally need regular maintenance work to the inside battery of dredging machine etc. nevertheless regular maintenance still hardly avoids the emergence of the condition such as short circuit, battery high temperature or work undervoltage appearing in the use, and then leads to hardly realizing better protection work in the use of dredging machine battery. Therefore, how to design a battery protection device in the using process of the dredger becomes a problem to be solved urgently at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an automatic battery protection device for a dredger, which has the advantage of good protection effect.

The technical scheme of the utility model is as follows: the battery automatic protection device for the dredger comprises a microprocessor connected with a battery of the dredger, wherein a temperature measuring unit, a voltage measuring unit, a current measuring unit and a short-circuit comparator are electrically connected to the microprocessor; a power supply voltage stabilizer, an indicator lamp, a discharge MOS tube driving unit and a power failure detection unit are connected between the microprocessor and the dredge battery, and the power supply voltage stabilizer, the indicator lamp, the discharge MOS tube driving unit and the power failure detection unit are all arranged in parallel; and a protection power switch is arranged between the power voltage stabilizer and the discharge MOS tube driving unit.

In the automatic battery protection device for the dredge machine, the discharge MOS transistor driving unit includes a variable capacitor C5, a variable capacitor C6, a zener diode D3, a resistor R11, an MOS transistor Q2 and a triode V2, and the variable capacitor C6, the zener diode D3 and the resistor R11 are arranged in parallel between the variable capacitor C5 and the MOS transistor Q2; a resistor R7 connected with the protection power switch in series is arranged between the MOS tube Q2 and the triode V2 in parallel, and a resistor R3 arranged in parallel is electrically connected between the resistor R7 and the power voltage stabilizer; the resistor R3 is connected in parallel with the protection power switch.

In the automatic battery protection device for the dredge, the power loss detection unit comprises a resistor R12, a resistor R13 and a triode V3, the resistor R13 and the triode V3 are arranged in parallel, the resistor R12 and the resistor R13 are connected in series, and the resistor R12 and the triode V3 are connected in series.

In the automatic battery protection device for the dredger, the temperature measuring unit includes an NTC temperature sensor, and a resistor R9, a resistor R10 and a variable capacitor C4 are electrically connected between the NTC temperature sensor and the microprocessor.

In the automatic battery protection device for the dredger, the current measuring unit comprises a resistor R17 electrically connected with the dredger battery and a first-order filter circuit, and the first-order filter circuit is connected with the input pin 3 of the short-circuit comparator; a resistor R14 and a resistor R15 for constituting a comparison reference voltage threshold are connected to the input pin 1 of the short-circuit comparator.

Compared with the prior art, the battery protection device for the dredger is designed, and the microprocessor is used for automatically detecting, judging and processing the phenomena of current, voltage, temperature, short circuit and the like in the working process of the dredger battery, so that the battery is automatically and quickly protected, the protection effect is improved, and the use is convenient; the power supply voltage stabilizer, the indicator lamp, the discharge MOS tube driving unit and the power failure detection unit are arranged between the microprocessor and the dredge machine battery, so that stable working voltage can be provided for the microprocessor by using the power supply voltage stabilizer, the stable work of the microprocessor is ensured, and the use stability is improved; the discharge MOS tube driving unit reduces the power consumption of the work of the microprocessor as much as possible while ensuring the measurement work of the microprocessor on voltage, current, temperature and the like, and the protection board is automatically closed under the condition that the dredging machine is closed by matching with the arrangement of the power loss detection unit, so that the power consumption of the circuit of the protection device in a dormant state is reduced, and the energy consumption of the whole protection device is reduced; the temperature measuring unit and the voltage measuring unit are arranged to realize synchronous detection of voltage, temperature and the like when the dredge machine battery works, and when a certain item exceeds a warning value, the microprocessor can carry out processing work, so that the protection effect on the dredge machine battery is improved; meanwhile, the current measuring unit and the short-circuit comparator are arranged, so that the short-circuit phenomenon of the dredging machine battery in the working process can be timely solved, and the use safety is improved. In addition, the NTC temperature sensor is arranged, and the characteristic that the resistance value in the NTC temperature sensor is reduced along with the rise of the temperature is utilized, so that the temperature is judged by detecting the resistance value, the aim of detecting and controlling the temperature is fulfilled, and the overall structure is simpler; through setting up first order filter circuit, utilize first order filter circuit can filter the alternating current composition in the electric current that flows through the short-circuit comparator to realize short-circuit comparator's stable work, further improved the stability of using. Therefore, the utility model not only can improve the protection effect, but also has the advantages of low power consumption, convenient use, simple structure, high use stability and high use safety.

Drawings

FIG. 1 is a flow chart of the present invention;

FIG. 2 is a circuit schematic of a processor;

FIG. 3 is a schematic diagram of the electrical circuit between the microprocessor and the dredge battery;

fig. 4 is a circuit schematic of the current measurement unit and the short circuit comparator.

The labels in the figures are: 1-microprocessor, 2-temperature measuring unit, 3-voltage measuring unit, 4-current measuring unit, 5-short circuit comparator, 6-power voltage stabilizer, 7-indicator light, 8-discharging MOS tube driving unit, 9-power-off detecting unit, 10-protective power switch and 11-NTC temperature sensor.

Detailed Description

The utility model is further illustrated by the following figures and examples, which are not to be construed as limiting the utility model.

Examples are given. The battery automatic protection device for the dredger comprises a microprocessor 1 connected with a battery of the dredger, wherein the microprocessor 1 is electrically connected with a temperature measuring unit 2, a voltage measuring unit 3, a current measuring unit 4 and a short-circuit comparator 5; a power supply voltage stabilizer 6, an indicator lamp 7, a discharge MOS tube driving unit 8 and a power loss detection unit 9 are connected between the microprocessor 1 and the dredge battery, and the power supply voltage stabilizer 6, the indicator lamp 7, the discharge MOS tube driving unit 8 and the power loss detection unit 9 are all arranged in parallel; a protective power switch 10 is arranged between the power voltage stabilizer 6 and the discharge MOS tube driving unit 8.

The discharge MOS tube driving unit 8 comprises a variable capacitor C5, a variable capacitor C6, a voltage stabilizing diode D3, a resistor R11, an MOS tube Q2 and a triode V2, wherein the variable capacitor C6, the voltage stabilizing diode D3 and the resistor R11 are arranged between the variable capacitor C5 and the MOS tube Q2 in parallel; a resistor R7 connected with the protection power switch 10 in series is arranged between the MOS transistor Q2 and the triode V2 in parallel, and a resistor R3 arranged in parallel is electrically connected between the resistor R7 and the power voltage stabilizer 6; the resistor R3 is connected in parallel with the protection power switch 10; the power loss detection unit 9 comprises a resistor R12, a resistor R13 and a triode V3, wherein the resistor R13 and the triode V3 are arranged in parallel, the resistor R12 and the resistor R13 are connected in series, and the resistor R12 and the triode V3 are connected in series; the temperature measuring unit 2 comprises an NTC temperature sensor 11, and a resistor R9, a resistor R10 and a variable capacitor C4 are electrically connected between the NTC temperature sensor 11 and the microprocessor 1; the current measuring unit 4 comprises a resistor R17 electrically connected with a dredge battery and a first-order filter circuit, and the first-order filter circuit is connected with an input pin 3 of the short-circuit comparator 5; a resistor R14 and a resistor R15 for constituting a comparison reference voltage threshold are connected to the input pin 1 of the short-circuit comparator 5.

The working principle is as follows: when in use, the whole protection device is connected with the dredging machine battery; when the switch of the dredging machine is turned on, the battery of the dredging machine can electrify the discharging MOS tube driving unit 8, so that the S pole pin on the MOS tube Q2 is electrified, the protection power switch 10 connected with the S pole pin on the MOS tube Q2 is electrified and started after the S pole pin on the MOS tube Q2 is electrified, so that the power regulator 6 connected with the protection power switch 10 works normally, and the power regulator 6 can provide 3.3V voltage for the microprocessor 1 (particularly, FX2C-20MRD, Cortex-R8, Cortex-M7 and other types of programmable controllers) when working normally, so that the microprocessor 1 can work normally; when the switch of the dredging machine is turned off, the triode V3 on the power loss detection unit 9 is turned off, and at this time, the microprocessor 1 detects that the dredging machine is turned off through the pin connected with the triode V3, and the microprocessor 1 controls the protection power switch 10 to be turned off, so that the whole protection device is powered off, and the power consumption in the dormant state is reduced.

In the process of discharging the battery, the NTC temperature sensor 11 can detect the temperature in the discharging process, because the NTC temperature sensor 11 is a thermistor probe, the resistance of which decreases with the increase of the temperature, the NTC temperature sensor 11 is connected with the microprocessor 1 through the resistors R9, R10 and the capacitor C4, when the resistance value of the NTC temperature sensor 11 changes, the voltage of the microprocessor 1 changes correspondingly, so that the microprocessor can calculate the resistance value of the NTC temperature sensor 11 according to the corresponding voltage to determine the temperature of the corresponding battery, and the microprocessor 1 can control the operation condition of the battery (i.e. open the battery switch or continue to close the battery switch) according to the detected temperature value to avoid the phenomenon of overhigh battery temperature; meanwhile, R17 in the current measuring unit 4 samples the current of the battery, according to ohm's law, after the current passes through R17, a voltage signal which changes with the current is formed on R17, then the voltage signal is filtered through a first-order filter circuit, the alternating current signal in the voltage is filtered, the voltage signal which completes the first-order filtering is divided into 2 paths, and one path is directly connected to the microprocessor 1 and used for the microprocessor 1 to calculate the current; the other path is transmitted to the short-circuit comparator 5.

When the short-circuit comparator 5 receives the voltage signal, it compares the voltage signal with a reference voltage threshold detected between the resistors R14 and R15; when a short circuit occurs, namely the voltage value of the voltage signal is greater than the reference voltage threshold, the short-circuit comparator 5 outputs a high level, the high level triggers the low level interruption of the IO port on the microprocessor 1, so that the microprocessor 1 is interrupted, and after the microprocessor 1 is interrupted, the discharging MOS transistor driving unit 8 is controlled to be immediately closed, so that the battery stops working, and short-circuit protection is realized.

Claims

1. Automatic protection device of battery for dredge, its characterized in that: the device comprises a microprocessor (1) connected with a dredge battery, wherein the microprocessor (1) is electrically connected with a temperature measuring unit (2), a voltage measuring unit (3), a current measuring unit (4) and a short-circuit comparator (5); a power supply voltage stabilizer (6), an indicator lamp (7), a discharge MOS tube driving unit (8) and a power loss detection unit (9) are connected between the microprocessor (1) and the dredge battery, and the power supply voltage stabilizer (6), the indicator lamp (7), the discharge MOS tube driving unit (8) and the power loss detection unit (9) are all arranged in parallel; a protective power switch (10) is arranged between the power voltage stabilizer (6) and the discharge MOS tube driving unit (8).

2. The automatic battery protection device for the dredge machine of claim 1, wherein: the discharge MOS tube driving unit (8) comprises a variable capacitor C5, a variable capacitor C6, a voltage stabilizing diode D3, a resistor R11, an MOS tube Q2 and a triode V2, wherein the variable capacitor C6, the voltage stabilizing diode D3 and the resistor R11 are arranged between the variable capacitor C5 and the MOS tube Q2 in parallel; a resistor R7 connected with the protection power switch (10) in series is arranged between the MOS transistor Q2 and the triode V2 in parallel, and a resistor R3 arranged in parallel is electrically connected between the resistor R7 and the power voltage stabilizer (6); the resistor R3 is connected in parallel with the protection power switch (10).

3. The automatic battery protection device for the dredge machine of claim 1, wherein: the power loss detection unit (9) comprises a resistor R12, a resistor R13 and a triode V3, wherein the resistor R13 and the triode V3 are arranged in parallel, the resistor R12 and the resistor R13 are connected in series, and the resistor R12 and the triode V3 are connected in series.

4. The automatic battery protection device for the dredge machine of claim 1, wherein: the temperature measuring unit (2) comprises an NTC temperature sensor (11), and a resistor R9, a resistor R10 and a variable capacitor C4 are electrically connected between the NTC temperature sensor (11) and the microprocessor (1).

5. The automatic battery protection device for the dredge machine of any one of claims 1 to 4, wherein: the current measuring unit (4) comprises a resistor R17 electrically connected with a dredge battery and a first-order filter circuit, and the first-order filter circuit is connected with an input pin 3 of the short-circuit comparator (5); a resistor R14 and a resistor R15 for forming a comparison reference voltage threshold are connected to an input pin 1 of the short-circuit comparator (5).