CN208198134U - A kind of accumulator of electric car monitoring system with overvoltage protection - Google Patents
A kind of accumulator of electric car monitoring system with overvoltage protection Download PDFInfo
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- CN208198134U CN208198134U CN201820358549.1U CN201820358549U CN208198134U CN 208198134 U CN208198134 U CN 208198134U CN 201820358549 U CN201820358549 U CN 201820358549U CN 208198134 U CN208198134 U CN 208198134U
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- control circuit
- accumulator
- monitoring system
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 21
- 239000004065 semiconductor Substances 0.000 claims description 19
- 230000005611 electricity Effects 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000013461 design Methods 0.000 description 5
- 230000005669 field effect Effects 0.000 description 5
- 238000007599 discharging Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005070 sampling Methods 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
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Abstract
The accumulator of electric car monitoring system with overvoltage protection that the utility model discloses a kind of; comprising vehicular power-bottle, voltage conversion circuit, bandpass filter module, the vehicular power-bottle successively passes through voltage conversion circuit, bandpass filter module connection micro controller module；Vehicular power-bottle includes charging control circuit, battery, charge/discharge control circuit, charging current detection module, terminal voltage detecting module, micro controller module, discharge current detection module, touch screen module, pwm driver；The utility model is analyzed by the variation to voltage and current in battery operation, rationally controls the progress of work of battery, to guarantee and improve the service life cycle of battery.
Description
Technical field
The utility model belongs to field of intelligent monitoring more particularly to a kind of accumulator of electric car prison with overvoltage protection
Control system.
Background technique
Battery is widely used in a variety of industrial circles and daily life, service life and charge less,
It overcharges and over-discharge is closely related.How to be effectively ensured and improve the service life of battery is in battery management system design
Urgent problem.
The design of battery management system mainly carries out in terms of being charged and discharged two, and different application scenarios are taken
Charge and discharge control strategy also emphasize particularly on different fields.Currently, charging strategy mainly uses three stage charging system, hotter mainly arteries and veins is studied
Punching charging, it is intended to avoid battery charge less and overcharge；Electric discharge strategy is main by the way of threshold voltage is arranged, it is intended to avoid storing
Battery over-discharge.
Switching Power Supply is widely used in almost all of electronic equipment with the features such as small-sized, light weight and high efficiency, is to work as
Modern electronics and information industry develops rapidly a kind of indispensable power mode.Primary side feedback Switching Power Supply adds because saving optocoupler
The structure of TL431 saves the space on system board, the reliability of system is reduced costs and improve, in power management
In be able to fast development and be widely applied.
Utility model content
Technical problem to be solved in the utility model be for background deficiency provide it is a kind of with overvoltage protection
Accumulator of electric car monitoring system is analyzed by the variation to voltage and current in battery operation, is rationally controlled
The progress of work of battery processed, to guarantee and improve the service life cycle of battery.
The utility model uses following technical scheme to solve above-mentioned technical problem
A kind of accumulator of electric car monitoring system with overvoltage protection includes charging control circuit, battery, electric discharge
Control circuit, charging current detection module, terminal voltage detecting module, micro controller module, discharge current detection module, touch screen
Module, pwm driver, gsm module, input/output module, alarm module and power-off modular；
Alternating current connects battery by charging control circuit；Battery and charge/discharge control circuit, charging current detection module,
Terminal voltage detecting module, discharge current detection module are connected with micro controller module respectively；Touch screen module and microcontroller mould
Block connection；
The pwm driver is connected with micro controller module, charging control circuit, charge/discharge control circuit respectively；The GSM
Module, input/output module, alarm module and power-off modular are connect with micro controller module respectively.
As a kind of further preferred side of the accumulator of electric car monitoring system with overvoltage protection of the utility model
Case, the charging control circuit include signal control terminal, charge power supply end, equipment feeder ear, battery-end, triode, the first MOS
Pipe and the second metal-oxide-semiconductor；Wherein, the charge power supply end is grounded by concatenated first resistor and second resistance；The triode
Base stage be separately connected the signal control terminal and charge power supply end, the collector of the triode connects institute by the 4th resistance
The grid of the second metal-oxide-semiconductor is stated, the source electrode of first metal-oxide-semiconductor is also connected by 3rd resistor, the emitter of the triode connects
Ground；The source electrode of second metal-oxide-semiconductor connects the charge power supply end by first diode, and drain electrode connects the equipment power supply
End；The source electrode of first metal-oxide-semiconductor connects the charge power supply end by first diode, grid connect the first resistor and
The tie point of second resistance, drain electrode connect the battery-end.
As a kind of further preferred side of the accumulator of electric car monitoring system with overvoltage protection of the utility model
Case, the charging current detection module use Hall sensor.
As a kind of further preferred side of the accumulator of electric car monitoring system with overvoltage protection of the utility model
Case, the chip model of the pwm driver are IR4427.
As a kind of further preferred side of the accumulator of electric car monitoring system with overvoltage protection of the utility model
Case, the discharge current detection module use Hall sensor.
The utility model compared with the prior art by using the above technical solution, has following technical effect that
The power supply module circuit structure of the utility model is simple, and number of devices is less, and component has high-temperature operation environment
It is required that volume compact, integral heat sink amount is smaller, is adapted for mount on that underground equipment is elongated, closed inner space, realizes to high temperature
Width funtion, broad frequency signal are adjusted, limit and protect under environment；
The utility model by battery set voltage threshold, setting alarm section, and by the detection to voltage into
Row early warning, the problems such as being effectively prevented from over-voltage；
The utility model is analyzed by the variation to voltage and current in battery operation, rationally controls electric power storage
The progress of work in pond, to guarantee and improve the service life cycle of battery.
Detailed description of the invention
Fig. 1 is the utility model accumulator of electric car monitoring system structure principle chart；
Fig. 2 is the utility model charging control circuit circuit diagram.
Specific embodiment
The technical solution of the utility model is described in further detail with reference to the accompanying drawing:
A kind of accumulator of electric car monitoring system with overvoltage protection, as described in Figure 1, comprising charging control circuit,
Battery, charge/discharge control circuit, charging current detection module, terminal voltage detecting module, micro controller module, discharge current detection
Module, touch screen module, pwm driver, gsm module, input/output module, alarm module and power-off modular；
Alternating current connects battery by charging control circuit, for controlling battery charging；
Battery and charge/discharge control circuit, for controlling electric power storage tank discharge；
Charging current detection module, terminal voltage detecting module, discharge current detection module connect with micro controller module respectively
Connect, for distinguishing the charging current of real-time detection battery, in battery voltage, battery discharge current, will acquisition
Electric signal be uploaded to micro controller module；
Touch screen module is connect with micro controller module, for checking the voltage status and charging and discharging currents shape of battery
State, and for setting microcontroller parameter threshold；
The pwm driver is connected with micro controller module, charging control circuit, charge/discharge control circuit respectively, is used for root
According to the voltage and current parameter of acquisition, and then drive the pwm signal of charging control circuit and charge/discharge control circuit field-effect tube；
The gsm module, input/output module, alarm module and power-off modular are connect with micro controller module respectively,
In, input/output module for setting voltage threshold, the alarm module for sounding an alarm, the GSM be used for and user into
Row communication, is uploaded to user for battery voltage parameter, power-off modular disconnects power supply in time, terminates the charging of battery, effectively
Ground avoid should not damage.
As shown in Fig. 2, the charging control circuit includes signal control terminal, charge power supply end, equipment feeder ear, battery
End,
Triode, the first metal-oxide-semiconductor and the second metal-oxide-semiconductor；Wherein, the charge power supply end passes through concatenated first resistor and
Two resistance eutral groundings；The base stage of the triode is separately connected the signal control terminal and charge power supply end, the collection of the triode
Electrode connects the grid of second metal-oxide-semiconductor by the 4th resistance, and the source of first metal-oxide-semiconductor is also connected by 3rd resistor
Pole, the emitter ground connection of the triode；The source electrode of second metal-oxide-semiconductor connects the charge power supply by first diode
End, drain electrode connect the equipment feeder ear；The source electrode of first metal-oxide-semiconductor connects the charge power supply by first diode
End, grid connect the tie point of the first resistor and second resistance, and drain electrode connects the battery-end.
The charging current detection module uses Hall sensor.The chip model of the pwm driver is IR4427, institute
Discharge current detection module is stated using Hall sensor.
12 V batteries hold voltage to change between the V of 10.5 V~14.0 during the work time, Chip Microcomputer A/D convert reference
Voltage is 5 V, it is therefore desirable to linearly be improved sampled signal.The design uses resistance value for 400 k Ω and 100 k Ω, essence
Degree carries out partial pressure sampling for 1% resistance, divides coefficient k=0.2.
Accumulator cell charging and discharging electric current is obtained using Hall sensor.Since the output of sensor is there are 2.5 V direct current biasings,
To eliminate bias voltage, reducing single-chip microcontroller conversion and calculating the time, difference channel is constructed using LM358, obtains actual electric current
It converts voltage and carries out AD sampling.
The presence of circuit noise and external interference to be mixed with various noises in AD sampled signal, to improve sampled signal letter
It makes an uproar ratio, uses Butterworth LPF design method to devise cut-off frequecy of passband as 100 Hz herein, stopband cutoff frequency
Rate is 500 Hz, and the second order active low-pass filter that output gain is 1 is filtered signal.
System realizes the unified management to accumulator charging/discharging process using PWM mode.It is special according to the volt-ampere of field-effect tube
Property it is found that in the saturation region of metal-oxide-semiconductor, when VGS is fixed, influence of the variation of VDS to IDS is little, has constant-current source characteristic.Cause
This, the constant current output of the available setting of gate source voltage of field-effect tube is adaptively adjusted by digital PI controller, is realized more
Segmentation modified constant-voltage charge management.In discharge process, accumulator voltage can gradually decrease down work blanking voltage from 13.1 V
10.5 V, so that the output of battery is unstable.Therefore, DC load is powered by the way of PWM pulsewidth modulation, is made
Battery stablizes output.
To prevent battery after disconnecting due to AC power source from utilizing the unidirectional of diode to switching power circuit back discharge
On state characteristic prevents battery from inversely discharging by concatenating Schottky diode MBR20100 in the loop.Simultaneously, it is contemplated that store
Battery is likely to occur reversal connection when accessing, and circuit board component is caused to damage, and design uses metal-oxide-semiconductor reverse-connection protection circuit, passes through resistance
R9 and zener diode D2 provides the gate source voltage of field-effect tube.When reverse connection of accumulator, gate source voltage VGS=0, field-effect tube
Cut-off, charge circuit are disconnected.
Claims (5)
1. a kind of accumulator of electric car monitoring system with overvoltage protection, it is characterised in that: comprising charging control circuit, store
Battery, charge/discharge control circuit, charging current detection module, terminal voltage detecting module, micro controller module, discharge current detect mould
Block, touch screen module, pwm driver, gsm module, input/output module, alarm module and power-off modular；
Alternating current connects battery by charging control circuit；Battery and charge/discharge control circuit, charging current detection module, end electricity
Pressure detection module, discharge current detection module are connected with micro controller module respectively；Touch screen module and micro controller module connect
It connects；
The pwm driver is connected with micro controller module, charging control circuit, charge/discharge control circuit respectively；The GSM mould
Block, input/output module, alarm module and power-off modular are connect with micro controller module respectively.
2. a kind of accumulator of electric car monitoring system with overvoltage protection according to claim 1, it is characterised in that:
The charging control circuit includes signal control terminal, charge power supply end, equipment feeder ear, battery-end, triode, the first metal-oxide-semiconductor
With the second metal-oxide-semiconductor；Wherein, the charge power supply end is grounded by concatenated first resistor and second resistance；The triode
Base stage is separately connected the signal control terminal and charge power supply end, and the collector of the triode passes through described in the connection of the 4th resistance
The grid of second metal-oxide-semiconductor also connects the source electrode of first metal-oxide-semiconductor, the emitter ground connection of the triode by 3rd resistor；
The source electrode of second metal-oxide-semiconductor connects the charge power supply end by first diode, and drain electrode connects the equipment feeder ear；Institute
The source electrode for stating the first metal-oxide-semiconductor connects the charge power supply end by first diode, and grid connects the first resistor and second
The tie point of resistance, drain electrode connect the battery-end.
3. a kind of accumulator of electric car monitoring system with overvoltage protection according to claim 1, it is characterised in that:
The charging current detection module uses Hall sensor.
4. a kind of accumulator of electric car monitoring system with overvoltage protection according to claim 1, it is characterised in that:
The chip model of the pwm driver is IR4427.
5. a kind of accumulator of electric car monitoring system with overvoltage protection according to claim 1, it is characterised in that:
The discharge current detection module uses Hall sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820358549.1U CN208198134U (en) | 2018-03-16 | 2018-03-16 | A kind of accumulator of electric car monitoring system with overvoltage protection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820358549.1U CN208198134U (en) | 2018-03-16 | 2018-03-16 | A kind of accumulator of electric car monitoring system with overvoltage protection |
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| CN208198134U true CN208198134U (en) | 2018-12-07 |
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| CN201820358549.1U Expired - Fee Related CN208198134U (en) | 2018-03-16 | 2018-03-16 | A kind of accumulator of electric car monitoring system with overvoltage protection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108382243A (en) * | 2018-03-16 | 2018-08-10 | 新日(无锡)发展有限公司 | A kind of accumulator of electric car monitoring system with overvoltage protection |
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2018
- 2018-03-16 CN CN201820358549.1U patent/CN208198134U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108382243A (en) * | 2018-03-16 | 2018-08-10 | 新日(无锡)发展有限公司 | A kind of accumulator of electric car monitoring system with overvoltage protection |
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Granted publication date: 20181207 |