CN209542809U - A kind of aviation charging and discharging lithium battery analyzer - Google Patents
A kind of aviation charging and discharging lithium battery analyzer Download PDFInfo
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- CN209542809U CN209542809U CN201920061898.1U CN201920061898U CN209542809U CN 209542809 U CN209542809 U CN 209542809U CN 201920061898 U CN201920061898 U CN 201920061898U CN 209542809 U CN209542809 U CN 209542809U
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Abstract
The utility model provides a kind of aviation charging and discharging lithium battery analyzer, including lithium battery and fault detection circuit, fault detection circuit includes charging circuit, discharge circuit, discrete fault-signal interface circuit, signal sample circuit, telecommunication circuit, single-chip microcontroller and peripheral unit, charging circuit maintains to stabilize the output voltage or export electric current for lithium battery charging, discharge circuit is for maintaining discharge parameter constant, discrete fault-signal interface circuit is used to receive the BMU discrete signal issued from the lithium battery, signal sample circuit is used to acquire the various performance parameters of lithium battery, telecommunication circuit is for realizing the communication between single-chip microcontroller and peripheral unit.The utility model, which can be realized, completes detection to lithium battery parameters by fault detection circuit, and contactor in super-high-current and can cross low-voltage etc. and in emergency circumstances cut off the contacting to guarantee safety of lithium battery and external circuitry.
Description
Technical field
The utility model relates to technical field of lithium batteries, and in particular to a kind of aviation charging and discharging lithium battery analyzer.
Background technique
Compared to general alkali storage battery and acid storage battery, lithium battery is had excellent performance, and is enjoyed great popularity.But the safety of lithium battery
Property problem be always an important factor for influencing lithium battery steady operation, when lithium battery is overcharged or when over-discharge, all can
Irreversible damage is caused to the internal structure of lithium battery, or even is exploded.B787 aircraft occurs more in use
Former capital of rising in rebellion is and to directly result in the grounding of B787 aircraft in the world as caused by aviation lithium battery.In order to make
B787 aircraft returns to blue sky as early as possible, and Boeing proposes a variety of corrective measures for aviation lithium battery, including redesigns and fill
The safer metal shell etc. of gap, increase between electric appliance, change cell arrangements, increase battery.In order to ensure the peace of lithium battery
Row for the national games, lithium battery interior devise battery monitoring unit.Complicated detection and protection electricity are provided with inside battery monitoring unit
Road is used to monitor the operation conditions of lithium battery, can find in time and detect the failure of lithium battery, and corresponding protection is taken to arrange
It applies.Research lithium battery failure Producing reason and mechanism are analysed in depth, is the key that design and develop lithium battery fault detection system.
China has possessed multi rack B787 aircraft at present, and can also introduce more B787 aircrafts later.With these types
A large amount of uses, airborne lithium battery proper use of and maintenance just become more urgent.Lithium battery is expensive, to maintenance environment
More demanding, attended operation is cumbersome and battery replacement is poor, once lithium battery is excessively discharged, will result directly in its automatic lock
Extremely, the normal operation that factory directly influences aircraft is returned.Currently, domestic operator all relies on for the to maintain equipment of lithium battery
Import directly influences the operation cost of maintenance company.Therefore, a lithium battery fault detection system of independent development is to substitute
The to maintain equipment of expensive foreign is Chinese Civil Aviation Maintenance enterprise urgent problem to reduce maintenance cost.
Utility model content
In view of this, problem to be solved in the utility model is to provide a kind of aviation charging and discharging lithium battery analyzer.
In order to solve the above technical problems, the technical solution adopted in the utility model is: a kind of aviation charging and discharging lithium battery point
Analyzer, including lithium battery and fault detection circuit, the fault detection circuit include charging circuit, discharge circuit, discrete failure
Signal interface circuit, signal sample circuit, telecommunication circuit, single-chip microcontroller and peripheral unit, the charging circuit are filled for lithium battery
Electricity maintains to stabilize the output voltage or export electric current, and the discharge circuit is for maintaining discharge parameter constant, the discrete failure letter
Number interface circuit is used to receive the BMU discrete signal from lithium battery sending, and the signal is transmitted to the single-chip microcontroller, institute
Signal sample circuit is stated for acquiring the various performance parameters of lithium battery, the performance parameter includes lithium battery interior temperature, ring
Border temperature, cell voltage electric current and cell negative terminal voltage parameter, the telecommunication circuit is for realizing the single-chip microcontroller and described outer
If the communication between unit, the lithium battery and the charging circuit, the discharge circuit and the discrete fault-signal interface
Circuit is to be electrically connected, and the signal sample circuit and the discharge circuit are electrically connected, the single-chip microcontroller and the charging
Circuit, the discharge circuit, the signal sample circuit, the discrete fault-signal interface circuit and the telecommunication circuit are with equal
To be electrically connected, the single-chip microcontroller is electrically connected by the telecommunication circuit and the peripheral unit.
Preferably, contactor and battery monitoring unit BMU are equipped in the lithium battery, the contactor is used in high current
Or cross low voltage condition incision and break the electric connections of the lithium battery and external circuits, the battery monitoring unit BMU is by main electricity
Cell monitoring unit B MU1, BMU2 and boosting battery monitoring unit BMU3, BMU4 composition, the main battery monitoring unit BMU1 are used
In the signal of the externally total voltage of output lithium battery, the main battery monitoring unit BMU2 is used for the feelings to the lithium battery over-voltage
Condition is detected, and issues corresponding disable signal when a failure occurs it, and the boosting battery monitoring unit BMU3 is used for described
The case where lithium battery over-voltage and the contactor are detected, and corresponding disable signal is issued when contactor cut-offs failure simultaneously
The contactor is disconnected, the boosting battery monitoring unit BMU4 is for too low to the lithium battery cell tension and high current to be filled
The situation of electricity is detected, and issues corresponding disable signal when a failure occurs it.
Preferably, the charging circuit includes filter circuit, rectification circuit, power conversion circuit and control circuit, described
Filter circuit is used to carry out em filtering to alternating current, and the rectification circuit, which primarily serves, is converted to filtered 220V alternating current
The effect of direct current, for the power conversion circuit for realizing power output, the control circuit is open-minded for control switch pipe
The constant current and constant-voltage charge function of charging circuit are realized with the time ratio of shutdown.
Preferably, the signal sample circuit includes thermistor and Hall current sensor, and the thermistor is used for
Ambient temperature and lithium battery interior temperature are detected, the Hall current sensor is defeated for measuring current signal
Voltage signal is transferred to single-chip microcontroller by amplifying circuit and signal conditioning circuit and carries out data processing out, and the thermistor uses
The model of the platinum resistance thermometer sensor, of PT100 model, the Hall current sensor is set as ACS756-100.
Preferably, the peripheral unit includes liquid crystal touch control screen, printer and USB storage.
Preferably, the single-chip microcontroller uses the single-chip microcontroller of C8051F020 model.
The utility model has the advantages and positive effects of: being provided by Hall current sensor to fault detection circuit
Current output signal reflects current parameters when charge and discharge and detected with the battery current detection circuit of system itself setting
Current value be compared, if check results deviation is larger, generate electric current verify failure, temperature signal is by thermistor as defeated
Signal out, pass through sample circuit and the scale division value that varies with temperature with reference to the thermistor can Extracting temperature signal, the signal
For reacting the internal temperature of lithium battery and being compared with the environment temperature that fault detection circuit detected, if check results
Deviation is larger, generates temperature checking failure, can be realized lithium battery automatic fault diagnosis function.
Detailed description of the invention
Fig. 1 is a kind of schematic block circuit diagram of aviation charging and discharging lithium battery analyzer of the utility model；
Fig. 2 is a kind of structural schematic diagram of the lithium battery of aviation charging and discharging lithium battery analyzer of the utility model；
Fig. 3 is a kind of circuit diagram of the charging circuit of aviation charging and discharging lithium battery analyzer of the utility model；
Fig. 4 is a kind of circuit diagram of the control circuit of aviation charging and discharging lithium battery analyzer of the utility model；
Fig. 5 is a kind of circuit diagram of the discharge circuit of aviation charging and discharging lithium battery analyzer of the utility model；
Fig. 6 is a kind of letter of the discrete fault-signal interface circuit of aviation charging and discharging lithium battery analyzer of the utility model
Number received circuit diagram；
Fig. 7 is a kind of letter of the discrete fault-signal interface circuit of aviation charging and discharging lithium battery analyzer of the utility model
Number input circuit diagram；
Fig. 8 is a kind of temperature measurement electricity of the signal sample circuit of aviation charging and discharging lithium battery analyzer of the utility model
Road schematic diagram；
Fig. 9 is a kind of current measurement electricity of the signal sample circuit of aviation charging and discharging lithium battery analyzer of the utility model
Road schematic diagram；
Figure 10 is a kind of signal conversion circuit of the telecommunication circuit of aviation charging and discharging lithium battery analyzer of the utility model
Schematic diagram；
Figure 11 is a kind of serial communication figure of the telecommunication circuit of aviation charging and discharging lithium battery analyzer of the utility model；
In figure: 21- charging circuit；211- filter circuit；212- rectification circuit；213- power conversion circuit；214- control
Circuit；22- discharge circuit；The discrete fault-signal interface circuit of 23-；24- signal sample circuit；25- telecommunication circuit；26- monolithic
Machine；27- peripheral unit.
Specific embodiment
In order to better understand the utility model, the utility model is carried out into one with attached drawing combined with specific embodiments below
The description of step.
As shown in Figure 1 to 11, the utility model provides a kind of aviation charging and discharging lithium battery analyzer, including lithium battery and
Fault detection circuit, the fault detection circuit include charging circuit 21, discharge circuit 22, discrete fault-signal interface circuit
23, signal sample circuit 24, telecommunication circuit 25, single-chip microcontroller 26 and peripheral unit 27, the charging circuit 21 are used for the lithium
Battery charging maintains to stabilize the output voltage or export electric current, and the discharge circuit 22 is used to maintain discharge parameter constant, it is described from
It dissipates fault-signal interface circuit 23 to be used to receive the BMU discrete signal issued from the lithium battery, and the signal is transmitted to institute
Single-chip microcontroller 26 is stated, the signal sample circuit 24 is used to acquire the various performance parameters of the lithium battery, the performance parameter packet
Lithium battery interior temperature, environment temperature, cell voltage electric current and cell negative terminal voltage parameter are included, the telecommunication circuit 25 is for real
Communication between the existing single-chip microcontroller 26 and the peripheral unit 27, the lithium battery and the charging circuit 21, the electric discharge
Circuit 22 and the discrete fault-signal interface circuit 23 are to be electrically connected, the signal sample circuit 24 and the electric discharge electricity
Road 22 is electrically connected, the single-chip microcontroller 26 and the charging circuit 21, the discharge circuit 22, the signal sample circuit 24,
To be to be electrically connected, the single-chip microcontroller 26 passes through described for discrete 23 circuit of fault-signal interface and the telecommunication circuit 25
Telecommunication circuit 25 and the peripheral unit 27 are electrically connected.
Further, contactor and battery monitoring unit BMU are equipped in the lithium battery, the contactor is used in big electricity
The electric connection that the lithium battery and external circuits are broken in stream or excessively low voltage condition incision, the battery monitoring unit BMU is by leading
Battery monitoring unit BMU1, BMU2 and boosting battery monitoring unit BMU3, BMU4 composition, the main battery monitoring unit BMU1
For externally exporting the signal of the total voltage of lithium battery, the main battery monitoring unit BMU2 is used for the lithium battery over-voltage
Situation is detected, and issues corresponding disable signal when a failure occurs it, and boosting battery monitoring unit BMU3 is used for the lithium
The case where battery over-voltage and the contactor are detected, and corresponding disable signal is issued when contactor cut-offs failure and is broken
The contactor is opened, the boosting battery monitoring unit BMU4 is used for and large current charge too low to the lithium battery cell tension
The case where detected, issue corresponding disable signal when a failure occurs it.
Further, the charging circuit 21 includes filter circuit 211, rectification circuit 212,213 and of power conversion circuit
Control circuit 214, the filter circuit 211 are used to carry out em filtering to alternating current, and the rectification circuit 212 is primarily served and will be filtered
220V alternating current after wave is converted to the effect of direct current, and the power conversion circuit 213 is for realizing power output, the control
Circuit 214 processed realizes the constant current and constant-voltage charge function of charging circuit for the time ratio that control switch pipe turns on and off.
Alternating current can be converted to using the charging circuit 21 of direct-current switch power supply technology the higher direct current of quality for meeting equipment requirement
Electricity, that is, by time ratio that control switch pipe turns on and off maintain to stabilize the output voltage or electric current, there is conversion
The features such as high-efficient, input range is wide, stable and reliable for performance, as shown in figure 3, alternating current is after em filtering through over commutation circuit
212, reach the requirement of output constant voltage or electric current using output end filtering via power conversion circuit 213, wherein power
Translation circuit 213 is controlled by PWM wave.Lithium battery maximum charge power required when charging is 1610W, therefore, by charging electricity
The input power on road 21 is designed as 2200W, then input current can achieve 10A, and maximum output voltage is reachable after rectificationKBP industrial frequency rectifying bridge is selected, maximum operating currenbt meets up to 50A, pressure voltage 1000V
Demand.Power conversion circuit 213 uses half-bridge converter circuit, and half-bridge converter circuit is made of two bridge arms, a bridge arm
It is made of the identical capacitor of two capacity properties equivalents, such as capacitor C5 and C6, resistance R2 and R3 resistance value is equal to be constituted with two capacitors
Discharge circuit；Another bridge arm is made of switching tube Q1 and Q2, and switching tube is controlled driving by pwm signal, two pwm signal complementations,
And pwm signal has fixed switching frequency, can realize that charging circuit 21 stablizes constant pressure or constant current output, power by the signal
Translation circuit 213 completes power output by high frequency transformer and full-wave rectifying circuit.In order to inhibit the direct current of output end
Ripple, L3, L4, C11, C7 constitute filter, higher by exporting power quality after filter filtering.
As shown in figure 4, control circuit 214 realizes charging circuit by the time ratio that control switch pipe turns on and off
Constant current and constant-voltage charge function, PWM wave needed for system are generated by UC3525 chip, and control circuit 214 passes through impedance transformation electricity
Road and amplifier circuit complete the acquisition to current signal and are converted into voltage signal, by this voltage signal and reference voltage
Signal subtraction show that error signal, the i.e. deviation of actual current value and setting electric current value are showed by voltage error signal.
This voltage error signal is sent into pi regulator circuit, realizes the real-time automatic adjustment to output electric current, current value is made to keep permanent
It is fixed.
As shown in figure 5, discharge circuit 22 realizes system discharge function using electronic load, compared to conventional, electric-resistance, effect
Rate is higher, and volume is smaller, with the obvious advantage, is realized by the conduction amount of control MOSFET or transistor and is controlled to stablizing for power parameter
System, using programmable 4 channel DC electronic loads, the working method of the DC Electronic Loads includes constant current mode (CC), constant-resistance
Mode (CR), constant voltage mode (CV), constant power mode (CP).Lithium battery is needed during discharge using constant-resistance discharge mode
The voltage value and current value and the resistance value for calculating discharge resistance of detection stream overload simultaneously carry out the resistance value and setting resistance value
Compare, if there is deviation, the constant-resistance state for realizing electronic load is adjusted by PI.When discharging lithium battery, Electronic Negative
Load needs to be set to constant-resistance discharge mode, and electronic load realizes data transmit-receive by establishing serial communication with single-chip microcontroller 26,
Using RS485 communication protocol, system selects MAX485CPA chip to realize signal conversion.
Since fault detection circuit needs effectively to receive battery monitoring unit BMU discrete signal to carry out fault detection,
In addition, fault detection circuit provides lithium battery charging signals and battery monitoring unit BMU enable signal, in order to eliminate failure inspection
Slowdown monitoring circuit and lithium battery interfere with each other, and realize fault detection circuit and lithium battery interior battery cell monitoring using photoelectric coupling circuit
The electrical isolation of unit B MU, as shown in Fig. 6 and Fig. 7, charging forbids the generation of 1 signal that will trigger optocoupler thus and external circuit
Completion status transmitting is connected, system is realized by the switching circuit that contactor and triode are constituted to battery monitoring unit BMU
Input lithium battery charging signals and battery monitoring unit BMU enable signal.
Further, the signal sample circuit 24 includes thermistor and Hall current sensor, the thermistor
For detecting to ambient temperature and lithium battery interior temperature, the Hall current sensor is for measuring electric current letter
Number, output voltage signal is transferred to single-chip microcontroller 26 by amplifying circuit and signal conditioning circuit and carries out data processing.System is to temperature
The detection of degree is divided into the detection to ambient temperature and the detection to lithium battery interior temperature, detection of the system to environment temperature
It is realized using bridge-type temperature measurement circuit.
Further, the thermistor uses the platinum resistance thermometer sensor, of PT100 model, the model of the Hall current sensor
It is set as ACS756-100, selects PT100 platinum resistance thermometer sensor, as thermistor, as shown in Fig. 8, PT100 platinum resistance thermometer sensor, and resistance
R38, R39, R46 form measuring bridge.Resistance value when PT100 is in 0 DEG C is 100 Ω, and the resistance value of design resistance R46 is
100 Ω are used as comparison resistance, and the ADC sampling module sampled reference voltage design of system is 2.5V, and therefore, it is necessary to export electric bridge
Difference signal by amplifier by proper ratio realize amplification be sent into single-chip microcontroller 26 ADC sampling module, in addition, in output end
Setting filter circuit 211 filters out interference, to realize the acquisition and measurement to ambient temperature signal.Wherein, 2.5V voltage is by selecting
REF192 chip provides.Lithium battery interior has thermistor to reflect lithium battery interior temperature, and therefore, system is to lithium
The measurement of internal temperature of battery is measured using voltage dividing resistance circuit, and the scale division value according to the thermistor is by itself and suitable resistance value
Resistance series connection is sent into ADC sampling module by filter circuit 211, realizes the measurement to lithium battery interior temperature, except measurement environment
Except temperature and lithium battery interior temperature, system also needs to be arranged current measurement circuit, and the maximum charging and discharging currents of lithium battery are
50A selects ACS756-100 type current Hall sensor to meet measurement needs, which can measure ﹣
100A~+100A electric current, output voltage signal are 20V/A (current direction is current Hall sensor positive direction) or 40V/A
(current direction is current Hall sensor negative direction), measurement accuracy is higher, can refer to shown in Fig. 9, chip use+5V power supply,
P2 and P3 is two connecting terminals of current Hall sensor, and the voltage signal of output is by amplifying circuit and signal condition electricity
The ADC sampling module of road feeding single-chip microcontroller 26.
Further, the peripheral unit 27 includes liquid crystal touch control screen, printer and USB storage, passes through telecommunication circuit
25 complete the communication function between single-chip microcontroller 26 and these digital peripherals units 27, and single-chip microcontroller 26 uses serial communication mode,
In, printer and USB storage are communicated by TTL signal with 26 serial ports of single-chip microcontroller, undesired signal conversion circuit.Liquid crystal
Touch screen uses RS232 communication protocol, and 26 serial ports of single-chip microcontroller is Transistor-Transistor Logic level signal, therefore needs to carry out conversion process to signal.
The conversion that TTL signal is changed into RS232 signal is completed using MAX3232 chip, can refer to shown in Figure 10.
MAX3232 chip needs+3.3V power supply, input terminal RX0, TX0 and 26 serial ports of single-chip microcontroller connect, signal into
After crossing conversion, output end Din and Dout is connect with the signal input output end mouth of liquid crystal touch control screen, realizes communication.Printer
With the conversion of USB storage undesired signal can directly with 26 serial communication of single-chip microcontroller, but since 26 serial port resource of single-chip microcontroller is limited,
The multiplexing to serial ports need to be realized using multi channel selecting chip MAX4618, can refer to shown in Figure 11.
Further, single-chip microcontroller 26 of the single-chip microcontroller 26 using C8051F020 model, the use of single-chip microcontroller 26 of the model
CIP-51 microcontroller core, compared to 8051 structures of standard, instruction execution speed is greatly improved, and speed is at least general
12 times of logical 8051 single-chip microcontrollers.In addition, C8051F020 chip has 64 digital IO pins, 5 general 16 fixed
When device and analog multichannel switch etc., with 12 100ksps eight channel ADC sampling modules, it is powerful, have excellent performance.
The working principle and the course of work of the utility model are as follows: firstly, after tester is connected power supply line by operator,
It turns on the power switch, rear liquid crystal touch control screen is bright, and instrument is without exception, can be operated, and the initial self-test on liquid crystal touch control screen is clicked
Button clicks operation into the preceding page of initial self-test operation, and lithium battery starts to carry out self-test, including temperature checking, and BMU is detected,
Contactor detection, voltage check and electric current verification, after initial self-test passes through, meeting auto-returned homepage, and print self-test and pass through
Report, if self-test is broken down, tester can sound the alarm, and malfunction indicator lamp brightens and prints failure cause, principle class
Lithium battery test, volume test, operation charging self-test and operation electric discharge self-test can be successively carried out like by step.At lithium battery
During charge or discharge, tester can monitor lithium battery in real time, when the failure letter for detecting that lithium battery is sent
Number, charging and acoustic warning can be interrupted immediately, and malfunction indicator lamp brightens, and printer can print corresponding failure reason.Forced electric discharge
It breaks down for lithium battery and needs the case where discharging it, this function need not first carry out lithium battery self-test, can be direct
It discharges lithium battery.Forced electric discharge is clicked in homepage, after inputting parameter, the page before running into forced electric discharge is clicked
Operation, can be to lithium battery forced electric discharge.If at this time tester receive battery monitoring unit BMU sending forbid electric discharge believe
Number it can still stop discharging.In addition, the tester has data storage function, and when machine is in homepage, insertion USB storage
Device, when followed by subsequent operation, tester can automatically write various data when charge and discharge, and user is facilitated to save and look into
It sees.
Fault detection circuit inputs lithium battery charging signals, and for detecting to lithium battery internal contact device, verifying is opened
Whether disconnected normal, for the signal there are two types of state, one kind is high-impedance state, and one kind is ground state, can be with when signal is high-impedance state
Internal contact device is disconnected, when signal is ground state internal contact device can be closed.Fault detection circuit input signal
Whether verifying internal contact device cut-offs normal；In addition, fault detection circuit inputs enable signal to battery monitoring unit BMU, use
In electrifying startup, for the signal there are two types of state, one kind is high-impedance state, and one kind is ground state, can when signal is ground state
So that battery monitoring unit BMU electrifying startup.Lithium battery interior has 8 battery cells, and battery cell voltage range is 3.96
Between~4.09V, lithium battery is also equipped with battery monitoring unit BMU, and battery monitoring unit BMU is fixed on battery case, passes through
Its internal detection circuitry completes the detection to lithium battery parameters.In addition, lithium battery interior also has a contactor, by
Battery monitoring unit BMU control, can be in super-high-current and low-voltage etc. in emergency circumstances cuts off lithium battery and external circuitry excessively
Connection to guaranteeing safety.Battery monitoring unit BMU is by main battery monitoring unit BMU1, BMU2 and boosting battery monitoring unit
BMU3, BMU4 composition, battery monitoring unit BMU are used to monitor the various states of battery, when by the voltage value of battery, charge and discharge
The various status signal transmissions such as current value and battery temperature value are to fault detection circuit, when battery monitoring unit BMU is detected
When battery failures or its own failure, fault-signal is issued, system timely responds to the safety to guarantee battery.Main battery monitoring is single
First BMU1 can overcharge lithium battery battery cell, over-discharge and the case where Voltage unbalance detect, can also be to lithium battery temperature
It spends high, too low situation to be detected, issues corresponding disable signal when failures are detected.In addition, main battery monitoring is single
First BMU1 also directly externally exports the signal of the total voltage of lithium battery.Main battery monitoring unit BMU2 can be to cell negative terminal battery mistake
The case where pressure, is detected, and issues corresponding disable signal when a failure occurs it, and boosting battery monitoring unit BMU3 can be to lithium electricity
The case where pond battery cell over-voltage, is detected, and boosting battery monitoring unit BMU3 can also carry out lithium battery internal contact device
Detection, corresponding disable signal is issued when being in contact device and cut-offfing failure and disconnects internal contact device, and boosting battery monitoring is single
The case where the case where first BMU4 can be to lithium battery battery cell brownout and large current charge, is detected, when a failure occurs it
Issue corresponding disable signal.
Battery monitoring unit BMU internal signal is divided into input signal and output signal, can be with according to the difference of signal form
Signal is divided into discrete fault-signal and non-discrete fault-signal, there is 8 signal reactions lithium battery in discrete fault-signal
Major failure situation, 8 discrete fault-signals are respectively as follows: charging and 1, electric discharge are forbidden to forbid 1, forbid 1 verification, battery failure, fill
Electricity forbids 2, forbids 2 verifications, low voltage failure, over current fault.Non-discrete fault-signal include battery current signal, voltage signal,
Temperature signal, power supply signal etc., they have reacted the operating status of lithium battery from different aspect, failure are judged when being fault detection
The important evidence of situation.It interacts between 8 discrete fault-signals, reflects different malfunctions jointly.Wherein, charging is prohibited
Only 1, charging forbids 2 signals and BMU3 open circuit protection to complete the protection to three ranks of battery superpressure jointly.Electric discharge forbids 1
The protection to two ranks of battery low pressure is completed jointly with battery failure signal.It is thus impossible to believe some discrete failure
Number isolated detection and analysis are carried out, should consider the state of 8 discrete fault-signals, 8 discrete failures simultaneously in combination
The combination of the different conditions of signal represents different fault conditions.
Current signal is provided from lithium battery interior Hall current sensor to fault detection circuit, is output signal.Reflection
The current parameters when charge and discharge and current value that detected with the battery current detection circuit of system itself setting is compared,
If check results deviation is larger, generates electric current and verify failure.Temperature signal, as output signal, passes through sampling electricity by thermistor
Road and the scale division value varied with temperature with reference to the thermistor can Extracting temperature signal, which is used to react the interior of lithium battery
Portion's temperature is simultaneously compared with the environment temperature that fault detection circuit detected, if check results deviation is larger, generates temperature
Failure is verified, thermistor uses the platinum resistance thermometer sensor, of PT100 model, and platinum resistance thermometer sensor, and resistance R38, R39, R46 form electric bridge,
Resistance value when PT100 is in 0 DEG C is 100 Ω, and the resistance value of design resistance R46 is that 100 Ω are used as comparison resistance, ADC sampling
The sampled reference voltage of module is 2.5V, and therefore, the difference signal of electric bridge output is put by amplifier by proper ratio realization
The big ADC sampling module for being sent into single-chip microcontroller 26, in addition, increasing filter circuit 211 in output end filters out interference, to realize to ring
The acquisition and measurement of border temperature signal.Lithium battery interior has thermistor to reflect lithium battery interior temperature, therefore, system
The measurement of lithium battery interior temperature is measured using voltage dividing resistance circuit, the scale division value according to thermistor is by itself and suitable resistance value
Resistance series connection, be sent into ADC sampling module by filter circuit 211, realize measurement to lithium battery interior temperature.
The embodiments of the present invention are described in detail above, but the content is only the preferable of the utility model
Embodiment should not be considered as limiting the scope of the present invention.It is all to become according to equalization made by the scope of the utility model
Change and improve etc., it shall still fall within the scope of this patent.
Claims (6)
1. a kind of aviation charging and discharging lithium battery analyzer, it is characterised in that: including lithium battery and fault detection circuit, the failure
Detection circuit includes charging circuit, discharge circuit, discrete fault-signal interface circuit, signal sample circuit, telecommunication circuit, monolithic
Machine and peripheral unit, the charging circuit maintain to stabilize the output voltage or export electric current, the electric discharge electricity for lithium battery charging
For maintaining discharge parameter constant, the discrete fault-signal interface circuit is used to receive the BMU issued from the lithium battery on road
Discrete signal, and the signal is transmitted to the single-chip microcontroller, the signal sample circuit is used to acquire the properties of lithium battery
Parameter, the performance parameter include lithium battery interior temperature, environment temperature, cell voltage electric current and cell negative terminal voltage parameter,
The telecommunication circuit is for realizing the communication between the single-chip microcontroller and the peripheral unit, the lithium battery and charging electricity
Road, the discharge circuit and the discrete fault-signal interface circuit be electrically connected, the signal sample circuit with it is described
Discharge circuit is electrically connected, the single-chip microcontroller and the charging circuit, the discharge circuit, the signal sample circuit, described
Discrete fault-signal interface circuit and the telecommunication circuit to be to be electrically connected, the single-chip microcontroller by the telecommunication circuit and
The peripheral unit is electrically connected.
2. a kind of aviation charging and discharging lithium battery analyzer according to claim 1, it is characterised in that: set in the lithium battery
There are a contactor and battery monitoring unit BMU, the contactor is used in high current or crosses low voltage condition incision and break the lithium electricity
The electric connection in pond and external circuits, the battery monitoring unit BMU is by main battery monitoring unit BMU1, BMU2 and boosting battery
Monitoring unit BMU3, BMU4 composition, the signal of total voltage of the main battery monitoring unit BMU1 for externally exporting lithium battery,
The main battery monitoring unit BMU2 is issued corresponding when a failure occurs it for detecting to the case where lithium battery over-voltage
Disable signal, the boosting battery monitoring unit BMU3 be used for the lithium battery over-voltage the case where and the contactor into
Row detection, corresponding disable signal is issued when contactor cut-offs failure and disconnects the contactor, the boosting battery monitoring
Unit B MU4 is detected for the case where and large current charge too low to the lithium battery cell tension, is sent out when a failure occurs it
Corresponding disable signal out.
3. a kind of aviation charging and discharging lithium battery analyzer according to claim 1, it is characterised in that: the charging circuit packet
Filter circuit, rectification circuit, power conversion circuit and control circuit are included, the filter circuit is used to carry out electromagnetism filter to alternating current
Wave, the rectification circuit primarily serve the effect that filtered 220V alternating current is converted to direct current, the power conversion electricity
Charging circuit is realized for realizing power output, time ratio of the control circuit for control switch pipe to turn on and off in road
Constant current and constant-voltage charge function.
4. a kind of aviation charging and discharging lithium battery analyzer according to claim 1, it is characterised in that: the signal sampling electricity
Road includes thermistor and Hall current sensor, and the thermistor is used for ambient temperature and lithium battery interior temperature
It is detected, the Hall current sensor passes through amplifying circuit and signal tune for measuring current signal, output voltage signal
It manages circuit transmission and carries out data processing to single-chip microcontroller, the thermistor uses the platinum resistance thermometer sensor, of PT100 model, the Hall electricity
The model of flow sensor is set as ACS756-100.
5. a kind of aviation charging and discharging lithium battery analyzer according to claim 1, it is characterised in that: the peripheral unit packet
Include liquid crystal touch control screen, printer and USB storage.
6. a kind of aviation charging and discharging lithium battery analyzer according to claim 1, it is characterised in that: the single-chip microcontroller uses
The single-chip microcontroller of C8051F020 model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920061898.1U CN209542809U (en) | 2019-01-15 | 2019-01-15 | A kind of aviation charging and discharging lithium battery analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920061898.1U CN209542809U (en) | 2019-01-15 | 2019-01-15 | A kind of aviation charging and discharging lithium battery analyzer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209542809U true CN209542809U (en) | 2019-10-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111600347A (en) * | 2020-04-30 | 2020-08-28 | 四川享锂来科技有限公司 | Remote control system for sharing lithium battery |
| EP3840106A1 (en) * | 2019-12-17 | 2021-06-23 | Globe (Jiangsu) Co., Ltd. | Battery pack diagnostic method and battery pack diagnostic device |
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2019
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3840106A1 (en) * | 2019-12-17 | 2021-06-23 | Globe (Jiangsu) Co., Ltd. | Battery pack diagnostic method and battery pack diagnostic device |
| CN111600347A (en) * | 2020-04-30 | 2020-08-28 | 四川享锂来科技有限公司 | Remote control system for sharing lithium battery |
| CN111600347B (en) * | 2020-04-30 | 2021-07-30 | 四川享锂来科技有限公司 | Remote control system for sharing lithium battery |
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