CN201876530U - Storage battery discharging detector - Google Patents

Abstract

The utility model relates to a storage battery discharging detector which has high testing precision, high discharging power, small size and light weight and greatly reduces the workload of daily test maintenance of a storage battery. The storage battery discharging detector comprises a single-chip microcomputer which is respectively connected with a current sensor and a voltage sensor through an ADC (Analog-to-Digital Converter) circuit, the single-chip microcomputer is connected with a discharging board through a DAC (Digital-to-Analog Converter) circuit, a PWM (Pulse-Width Modulation) circuit and a discharging board control circuit, and a fan control detecting module, a PC (Personal Computer)/USB communication module, a display module, a storage module, a clock circuit and a watchdog circuit are also respectively connected to the single-chip microcomputer.

Description

A kind of battery discharging detector

One, technical field:

The utility model relates to a kind of accumulator pick-up unit, especially relates to a kind of battery discharging detector.

Two, background technology:

In the background technology, existing storage battery professional test instrument test complexity, precision is low, and discharge power is big, and volume is big simultaneously, and weight is big, and the line service amount is big.

Three, utility model content:

The utility model provides a kind of battery discharging detector in order to solve the weak point in the above-mentioned background technology, its measuring accuracy height, and discharge power is big, and volume is little, and is in light weight, significantly reduced the workload of the daily test maintaining of accumulator.

For achieving the above object, the technical solution adopted in the utility model is:

A kind of battery discharging detector, it is characterized in that: comprise single-chip microcomputer, single-chip microcomputer is connected with voltage sensor with current sensor respectively by adc circuit, single-chip microcomputer also is connected with discharge electrode with pwm circuit and discharge electrode control circuit by DAC, also is connected with fan control detection module, PC/USB communication module, display module, memory module, clock circuit and watchdog circuit on the single-chip microcomputer respectively.

Above-mentioned single-chip microcomputer is a W77E516B-DIP40 type single-chip microcomputer.

Compared with prior art, the advantage and the effect that the utlity model has are as follows:

1, have the on-line monitoring function:

Be in online discharge in electric battery, all fill, under the state such as floating charge, electric battery and single battery are carried out real-time monitoring; Comprise that whole group voltage, single battery voltage, whole group charging and discharging currents, whole group charge into capacity, whole group is emitted capacity, monitoring time etc.; The user can be provided with monitoring battery joint number.

2, check discharging function:

Behind the electric battery detachment system, utilize intelligent fictitious load to carry out constant current and check discharge, configure parameters such as " discharge current ", " discharge time ", " discharge capacity ", " whole group termination protection voltage ", " monomer stops protection voltage ", tester just automatically performs discharging function, and shows that in real time discharge current, battery put data such as capacity, whole group voltage, single battery voltage, discharge time; When electric battery reaches termination sparking voltage setting value, termination discharge capacity setting value, termination setting value discharge time, arbitrary monomer battery voltage is lower than termination monomer voltage setting value or the people all can stop discharge test for carrying out terminating operation.

3, the user can be provided with the discharge battery joint number.

Can preserve 10 groups of on-line monitorings, 10 groups and check the discharge test data; The user can inquire about, deletes and transmit operation to data.

4, data can be uploaded to computing machine by serial ports, also can export to USB flash disk.

5, automatic protection functions:

Whole group or cell are unusual when detecting in test process, during the tester operation irregularity, tester stops test automatically, so that battery is protected.

6, the tester main frame adopts monitor portion and power section integrated design, and power section adopts novel high effect device, is the battery pack volume test instrument that a volume is little, efficient is high.

Four, description of drawings:

Fig. 1 is a schematic block circuit diagram of the present utility model;

Fig. 2 is circuit theory diagrams of the present utility model;

Fig. 3 is for adjusting the pipe unit circuit diagram;

Fig. 4 is all-pass pipe circuit theory diagrams;

Fig. 5 is main program structure figure of the present utility model;

Fig. 6 is a main program flow chart of the present utility model;

Fig. 7 is a timing interrupt service routine process flow diagram of the present utility model.

Five, embodiment:

Referring to Fig. 1 and Fig. 2, the utility model comprises single-chip microcomputer W77E516B-DIP40, single-chip microcomputer is connected with voltage sensor with current sensor respectively by adc circuit, single-chip microcomputer also is connected with discharge electrode with pwm circuit and discharge electrode control circuit by DAC, also is connected with fan control detection module, PC/USB communication module, display module, memory module, clock circuit and watchdog circuit on the single-chip microcomputer respectively.In the adc circuit, ADC adopts serial TCL2543 circuit, benchmark REF198 (4.096V), passage 0 on-line monitoring charges into electric current, and passage 1 on-line monitoring is emitted electric current, passage 2 discharge currents, passage 3 plug-in load 1 discharge currents, passage 4 plug-in load 2 discharge currents, passage 5 whole group voltages, the voltage signal of sensor output is followed input ADC through 324 amplifiers.In the discharge electrode control circuit, metal-oxide-semiconductor 0 ~ 9 is a straight pipe, is controlled by CPLD by CPU, and low level is effective, and by the output of SG3525 circuit, low level is effective by DAC (AD7541) for PWM output, PWM output for metal-oxide-semiconductor 10, and the input of DAC is imported by CPLD by CPU.In fan control, the testing circuit, the fan control low level is effective, and fan detects just often to work and is low level, stops to be high level.In the communicating circuit, adopt the RS485 bus, use the UART0 of CPU, realize that by MAX485 baud rate=19200 are produced by the T1 timer with the collector communication.In the PC/USB communication, adopt the RS232 bus with the PC communication, use the UART1 of CPU, realize by MAX232.Adopt 2 direct communications of CPU (Transistor-Transistor Logic level) with the USB communication, use the UART1 of CPU, PC and USB time-sharing multiplex UART1 switch by 74HC126 control, and baud rate=19200 are produced by the T1 timer.Keyboard adopts 4X4 keyboard, Input Address=0x0002, OPADD=0x0002.Show and adopt 320X240 LCD module, driving circuit SED1335.Memory RAM adopts 6264 (8K).FLASH adopts AT45DB161B (16Mbit), SPI interface.Clock circuit adopts DS1302 circuit, SPI interface.Temperature survey adopts DS18B20 to carry out temperature survey, with CPU P3.5 simulation 1-Wire bus.In the moisture measurement, humidity sensor adopts the HS1101 humicap, produces the frequency corresponding with relative humidity by 555 oscillatory circuits, and with the T0 counting mode survey frequency of CPU, tabling look-up obtains rh value.House dog is adopted MAX813, about 1.6 seconds of house dog time, feeds 1 time with P1.0 100ms.CPU adopts W77E516B-DIP40.In the sampling section signal condition, sample by ADC after the direct dividing potential drop of the voltage of 12V battery; Each module can sample 1 the joint monomer be the battery of 12V.Discharge electrode adopts 5 metal-oxide-semiconductors, and pipe is adjusted in a conduct, and 4 as the all-pass pipe.Fig. 3 is for adjusting the pipe unit circuit diagram, and Fig. 4 is all-pass pipe circuit theory diagrams.

Referring to Fig. 5 and Fig. 6, program is divided into a plurality of tasks, by the timeslice management.The master routine program circuit is:

1, beginning;

2, self check, initialization;

3, do you declare the key task are arranged? have, enter next step; Then do not enter for the 5th step;

4, the key task is handled;

5, do you declare the reception acquisition tasks are arranged? have, enter next step; Then do not enter for the 7th step;

6, receiving acquisition tasks handles;

7, do you declare the transmission acquisition tasks are arranged? have, enter next step; Then do not enter for the 9th step;

8, sending acquisition tasks handles;

9, do you declare the PC task that receives are arranged? have, enter next step; Then do not enter for the 10th step;

10, receiving the PC task handles;

11, do you declare measuring task are arranged? have, enter next step; Then do not enter for the 12nd step;

12, measuring task is handled;

13, do you declare the discharge control task are arranged? have, enter next step; Then do not enter for the 14th step;

14, the discharge control task is handled;

15, do you declare the 1s task are arranged? have, enter next step; Then do not enter for the 16th step;

16, the 1s task is handled;

Need 17, declaring hello dog? have, enter next step; Then do not return for the 3rd step;

18, feeding dog handles..

Referring to Fig. 7, regularly interrupt service routine adopts T2 regularly to interrupt, the time base=20ms.The timeslice of finishing each task is controlled, receive time-out regularly reaches and the function of time correlation.Program circuit is:

1, beginning;

2, keep the scene intact;

3, key scanning;

4, send at interval regularly to acquisition module;

5, discharge control regularly;

6, do you declare 100ms? be to enter next step; Not then to enter for the 13rd step;

7, measuring task regularly;

8, receive acquisition module regularly;

9, receive PC regularly;

10, receive PC regularly;

11, do you judge 1s? be to enter next step; Not then to enter for the 13rd step;

12, activate the 1s task;

13, recover on-the-spot, finish.

Claims (2)

1. battery discharging detector, it is characterized in that: comprise single-chip microcomputer, single-chip microcomputer is connected with voltage sensor with current sensor respectively by adc circuit, single-chip microcomputer also is connected with discharge electrode with pwm circuit and discharge electrode control circuit by DAC, also is connected with fan control detection module, PC/USB communication module, display module, memory module, clock circuit and watchdog circuit on the single-chip microcomputer respectively.

2. a kind of battery discharging detector according to claim 1 is characterized in that: single-chip microcomputer is a W77E516B-DIP40 type single-chip microcomputer.

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