CN206264804U - A kind of battery management system auto sleep and the circuit for waking up - Google Patents
A kind of battery management system auto sleep and the circuit for waking up Download PDFInfo
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- CN206264804U CN206264804U CN201621320117.9U CN201621320117U CN206264804U CN 206264804 U CN206264804 U CN 206264804U CN 201621320117 U CN201621320117 U CN 201621320117U CN 206264804 U CN206264804 U CN 206264804U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The utility model discloses a kind of battery management system auto sleep and the circuit for waking up, the power input of electronic switch is connected with the power supply of BMS systems, the pulse input of electronic switch is connected with the Pulse pins of BMS systems, and the power supply output of electronic switch is connected with super capacitor charging circuit；The output of super capacitor charging circuit is connected with automatic wake-up circuit；The output of automatic wake-up circuit is connected to the INT_active pins of battery management system BMS；After electronic switch receives the Pulse high level signals of BMS systems, super capacitor charges；System sends Pulse low level signals, and super capacitor stops charging, and electric capacity constantly discharges, and automatic wake-up circuit output signal INT_active gradually rises, until more than certain threshold value, waking up BMS systems.The utility model can greatly prolong the time for postponing to wake up, and reduce the excess loss for repeatedly waking up and causing system frequent starting to bring.
Description
Technical field
The utility model is related to battery management system field, more particularly to a kind of battery management system auto sleep with wake up
Circuit.
Background technology
In recent years, with the implementation energetically of national energy-saving emission reduction policy, electric motor car is had become in daily life very
Easily the vehicles, greatly save the travel time of people.Battery management system (BATTERY MANAGEMENT
SYSTEM, BMS) it is also the power part of most critical as an important component in the middle of vehicle technology research, it is ensured that
The reliability service of cell and battery bag.
But the reasons such as the operating power consumption due to battery self discharge in itself and battery management system, even if electric motor car is not expert at
Car state, battery electric quantity is also consumed constantly always.It is continuous with battery electric quantity if be not controlled by its power consumption
Decline, finally may result in battery cross put, battery is unbalance etc., and extreme case occurs, and may directly damage battery, influence electricity
The service life of pond group.
The service condition of electric motor car is analyzed, its most time belongs to static condition, in order to reduce battery management system
The operating power consumption situation of system, system must in an idle condition enter park mode.But, if system does not work always,
The appearance of foregoing problems can be caused because of the self discharge of battery.This requires optimal work of the battery management system under idle operating mode
It is as mode：First detect whether in idle condition, be then to enter resting state, in resting state through after a period of time can
Automatically it is waken up, re-starts the detection of operating mode, and constantly said process is circulated.
In the prior art, battery management system wake-up mode wakes up or timer wake-up for artificial mostly, specific table
It is now：Communication wake-up, house dog timing wake-up etc..Although these modes reduce the work(of idle operating mode to a certain extent
Consumption, but manually wake up and battery status can not be judged automatically, self-discharge of battery may be caused after long-time stands
Cross and put and damage；The cycle that house dog timing wakes up is shorter, can cause the wake-up repeatedly of system and in a disguised form increased power dissipation.
Utility model content
The purpose of this utility model is the shortcoming and deficiency for overcoming prior art, there is provided a kind of battery management system is automatic
Dormancy and the circuit for waking up, postpone wake-up system by way of using super capacitor energy-storage, can greatly prolong delay and call out
The awake time, reduce the excess loss for repeatedly waking up and causing system frequent starting to bring.
The purpose of this utility model is achieved through the following technical solutions：A kind of battery management system auto sleep and wake-up
Circuit, including BMS systems, electronic switch, super capacitor charging circuit and automatic wake-up circuit；BMS systems include Pulse pins
With INT_active pins；
The power input of electronic switch is connected with the power supply of BMS systems, pulse input and the BMS systems of electronic switch
Pulse pins are connected, and the power supply output of electronic switch is connected with super capacitor charging circuit；The output of super capacitor charging circuit
It is connected with automatic wake-up circuit；The output of automatic wake-up circuit is connected to the INT_active pins of BMS systems；
When system is in wake-up states, after the electronic switch receives the Pulse high level signals of BMS systems, after giving
Level super capacitor charging circuit is powered, and super capacitor charges, automatic wake-up circuit output signal INT_active, and magnitude of voltage is approached
Super-capacitor voltage；Otherwise, system sends Pulse low level signals, and super capacitor charging circuit stops being charged for super capacitor,
System enters resting state；Automatic wake-up circuit output signal INT_active is initially low level, and electric capacity constantly discharges, from
Dynamic wake-up circuit output signal INT_active gradually rises, until more than certain threshold value, waking up BMS systems.
Preferably, electronic switch includes the first triode, the 4th triode and 3rd resistor, the 6th resistance, electronic switch
The transistor emitter of middle PNP pipe first is connected with the power supply of BMS systems, between the first transistor base and emitter stage and connects the 3rd
Resistance, the first transistor collector is connected with the input of super capacitor charging circuit, the collection of base stage and the triode of NPN pipes the 4th
Electrode is connected, and the base stage of the 4th triode is connected by the 6th resistance with the Pulse pins of BMS systems, the 4th triode hair
Emitter-base bandgap grading is connected to the ground.
Preferably, super capacitor charging circuit includes diode and super capacitor, the input and electronic switch of diode
Output be connected, the output end of diode is connected with the anode of super capacitor, and the negative terminal of super capacitor is connected to the ground.
Further, described super capacitor uses the super capacitor of 1F/5.5V.
Preferably, automatic wake-up circuit includes the 3rd triode, the second triode, the 5th triode and the 7th resistance, the
One resistance, the 8th resistance, the 4th resistance；3rd triode selects PNP pipe, and the 3rd transistor base is by the 7th resistance and ground phase
Connect, and remittance is connected to the input of super capacitor charging circuit, the 3rd transistor emitter is filled by the 4th resistance with super capacitor
The output end of circuit is connected, the 3rd transistor collector by the 8th resistance eutral grounding and with the base of the triode of NPN pipes the 5th
Extremely it is connected, the colelctor electrode of the 5th triode is connected with the base stage of the triode of PNP pipe second, the emitter stage of the second triode passes through the
One resistance is connected with the output end of super capacitor charging circuit, and the second transistor collector is connected to the ground, and the two or three pole
INT_active pin of the base signal output of pipe to BMS systems.
Preferably, the battery management system auto sleep also includes vibration detection circuit and/or point with the circuit for waking up
Fiery signal circuit, vibration detection circuit and/or ignition signal circuit in parallel be linked into the output end of super capacitor charging circuit with
Between the output end of automatic wake-up circuit；When being given a shock, vibration detection circuit conducting, INT_active voltages rise, or
When person's ignition signal is transmitted, ignition signal circuit turn-on, INT_active signal voltages rise, once INT_active signals are electric
Pressure just wakes up BMS systems more than threshold value.
Further, charged with super capacitor after the vibration detection circuit is connected by vibroswitch and second resistance
The output end of circuit is connected, and lower end is connected with INT_active pins.
Further, the ignition signal circuit charges by after ignition switch and the 5th resistant series with super capacitor
The output end of circuit is connected, and lower end is connected with INT_active pins.
Preferably, the BMS systems also include CAN signaling interface.
Preferably, the BMS systems also drive signal interface including relay.
Preferably, NPN pipes can be replaced with Nmos pipes in circuit, and PNP pipe can be replaced with Pmos.
The utility model compared with prior art, has the following advantages that and beneficial effect：
1st, the utility model postpones wake-up system by way of using super capacitor energy-storage, on the one hand increases significantly
Postpone the time for waking up, it is to avoid repeatedly wake up the excess loss that the system frequent starting for causing brings, on the other hand, super capacitor
Charge-discharge electric power is high, and long service life, energy storage efficiency is high, substantially increases the realizability and stability of circuit.
2nd, the utility model is connect by vibration detection circuit, ignition signal circuit and battery management system CAN signal
Mouth can realize vibration wake up, igniting wake up and communication wake up, the system of improve exit park mode return normal mode can
By property, it is ensured that system being capable of the reliably free switching between dormancy and normal mode.
3rd, the utility model can realize failure countermeasure by the drive signal interface of battery management system relay,
When the system that detects has the failure of unrepairable, by Relay signals the dump of system, it is directly entered disconnected
Power mode, it is to avoid system failure.
4th, the utility model is realized constituting control circuit by simple electronic component, and low in energy consumption, simple structure, operation is held
Easily.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of the utility model embodiment；
Fig. 2 (a), (b) are the export structure isoboleses of the utility model embodiment；
Fig. 3 is that the auto sleep of the utility model embodiment and the method for waking up realize flow chart；
Fig. 4 is the sequential logic figure of the utility model embodiment.
Specific embodiment
The utility model is described in further detail with reference to embodiment and accompanying drawing, but implementation of the present utility model
Mode not limited to this.
Embodiment 1
As shown in figure 1, a kind of battery management system auto sleep and the circuit for waking up, including electronic switch 1, super capacitor
Charging circuit 2, automatic wake-up circuit 3 and BMS systems 6；
Wherein, the power input of electronic switch 1 is connected with the 5V power supplys of BMS systems, and power supply output is charged with super capacitor
Circuit 2 is connected, and its pulse input is connected with the Pulse pins of BMS systems；
The output of super capacitor charging circuit 2 is connected with automatic wake-up circuit 3；Automatic wake-up circuit 3 is connected to BMS systems
6 INT_active pins；
In each module, and it is made up of simple components such as resistance capacitance and triodes respectively, implementation is simple and reliable.Its
The NPN pipes and PNP pipe are not limited to model used, it is also possible to change NMOS tube and PMOS etc. into and substitute pipe.5V electricity used
Source is that cell voltage is obtained by Switching Power Supply and linear stabilized power supply LDO conversions.
Electronic switch 1 includes triode Q1, Q4 and resistance R3, R6, the electricity of Q1 emitter stages and BMS systems in electronic switch
Source connects, between PNP pipe Q1 base stages and emitter stage and connecting resistance R3, Q1 colelctor electrode and super capacitor charging circuit input phase
Even, base stage is connected with the colelctor electrode of NPN pipes Q4, and the base stage of Q4 is connected by resistance R6 with the Pulse pins of BMS systems, Q4
Emitter stage is connected to the ground.
The output of input of the super capacitor charging circuit 2 comprising diode D1 and super capacitor C1, D1 and electronic switch
It is connected, the output end of D1 is connected with the anode of C1, and the negative terminal of C1 is connected to the ground；
Described super capacitor C1 uses the super capacitor of 1F/5.5V.
The automatic wake-up circuit 3 includes triode Q3, Q2, Q5 and resistance R7, R1, R8；Q3 selects PNP pipe, Q3 bases
Pole is connected to the ground by R7, and remittance is connected to the input of super capacitor charging circuit, and Q3 emitter stages are filled by R4 with super capacitor
The output end of circuit is connected, and Q3 colelctor electrodes are grounded by R8 and are connected with the base stage of NPN pipes Q5, the colelctor electrode and PNP of Q5
The base stage of pipe Q2 is connected, and the emitter stage of Q2 is connected by R1 with the output end of super capacitor charging circuit, Q2 colelctor electrodes and phase
Even, and the base signal output of Q2 the INT_active pins of BMS systems are arrived.
Above-mentioned battery management system auto sleep with wake up circuit, the know-why for using for：
After the electronic switch 1 receives Pulse high level signals, Q4 is connected with GND, and the emitter junction positively biased of Q1, Q1 leads
Lead to and powered to rear class super capacitor, when Pulse low levels, Q4 colelctor electrodes are connected by R3 with VDD5, Q1 emitter stages are less than and open
Open voltage and end, stop being charged for super capacitor.
The super capacitor charging circuit 2 only charges when the Q1 of electronic switch (1) is turned on, when Q1 ends, D1
Reversely cut-off, C1 provides electric energy and wakes up waveform to rear class electric discharge.
The automatic wake-up circuit 3 includes two states of super capacitor charging and discharging；
The principle of described charged state is：When Q1 conductings are charged for super capacitor, Q3 emitter voltages are about 4.3V,
Base stage is about 5V (not considering the tube voltage drop of Q1), and now the emitter junction of Q3 is reverse-biased and end, R4, R8 not power consumption, and rear class Q5 is because of base
Pole is low level and emitter junction cannot be opened and ended, R1 not power consumptions, and the resistance that now module only has R7 power consumptions, R7 takes
200k, now output signal INT_active be about super-capacitor voltage；
The principle of described power supply state is：When Q1 ends, D1 is reverse-biased, and the base stage of Q3 is grounded by R7, and emitter junction is just
Partially, Q3 conductings, R4, Q3 and R8 begin to decline to super-capacitor voltage partial pressure, R8 terminal voltages from about 0.9V, Q5 emitter junctions positively biased and
Conducting, its collector voltage is approximately equal to GND, the emitter junction positively biased of Q2 and turns on, and now output signal INT_active is Q5's
Collector voltage, level is low；Electric capacity constantly discharges, and Q5 base voltages are gradually reduced, and Q5 is gradually by amplification state to off-state, pipe
Pressure drop is gradually boosted, and output signal INT_active gradually rises, and when voltage increases to over the high-level threshold 2V of BMS, is
BMS provides high trigger signal, afterwards by deciding whether to provide again Pulse signal conductions Q1 for rear class after BMS treatment
It is powered.
In above-described embodiment, Q5 and Q2 constituted using NPN pipes and PNP pipe be equivalent to NPN up to woods pipe, such as Fig. 2 (a),
Shown in (b), realize low current signal and drive the purpose for reaching woods pipe, so that the resistance of R4 and R8 can be substantially increased, greatly
Big reduce loss.
Embodiment 2
A kind of battery management system auto sleep with wake up circuit, including electronic switch 1, super capacitor charging circuit 2,
Automatic wake-up circuit 3, vibration detection circuit 4, ignition signal circuit 5 and BMS systems 6；
Composition and the annexation ginseng of electronic switch 1, super capacitor charging circuit 2, automatic wake-up circuit 3 and BMS systems 6
According to embodiment 1；
Automatic wake-up circuit 3, vibration detection circuit 4, the output of ignition signal circuit 5 converge and are connected to the INT_ of BMS systems 6
Active pins；Vibration detection circuit 4 is connected after being connected by vibroswitch S1 and R2 with the output of super capacitor C1, and
Lower end is connected with INT_active pins；Ignition signal circuit 5 by ignition switch S2 and R5 connect after with super capacitor C1
Output be connected, and lower end is connected with INT_active pins.
The drive signal output of BMS the systems 6 also input comprising CAN signal and relay.
The input signal of BMS systems 6 is wake-up signal INT_active and CAN signal, and output signal is Pulse signals
With Relay signals.
In power supply process, when system receives outer triggering signal, BMS can be also waken up.The present embodiment is examined for vibration
Survey and ignition signal, the rising edge of other outer triggering signals is equally applicable for the system, and flexibility is preferable.Its principle is such as
Under：
As shown in the S1 and R2 of Fig. 1, when electric vehicle body is given a shock, the viberating detection switch on bodywork system can lead
It is logical, the colelctor electrode that high level draws high Q5 is directly given, now the emitter junction of Q2 is reverse-biased and end, because Q5 is in faint amplification shape
State, conducting resistance is larger, and tube voltage drop is larger, and INT_active voltages rise.
Similarly, as shown in the S2 and R5 of Fig. 1, when electric motor car ignition signal is transmitted, INT_active signal voltages rise.
The vibration detection circuit 4 and ignition signal circuit 5 as auxiliary detection circuit, using with automatic wake-up circuit
The mode of 3 remittance lines realizes OR circuit, only one of which high level, just output wake-up signal.
When the voltage of INT_active begins to ramp up from 0, once exceeding threshold value 2V, (MCU used is F28M35, and its threshold value is
2V), just triggering BMS is interrupted and is waken up BMS systems.
Another operating mode is, when system receives the communication signals such as CAN, MCU used can automatically waken up BMS, move back
Go out resting state and enter normal mode of operation.
Realize that battery management system auto sleep is with the step of wake-up by the present embodiment：
1) system sends Pulse=1 signals, is that super capacitor is powered, while setting Delay=0, BUSY=1；
2) according to BMS built-in functions, judge now whether failure, preserved if failure the now operating mode of BMS and pass through BMS
Relay signals the power supply of BMS systems is broken, into step 7, whole system thoroughly goes offline, and waits the upper electricity of igniting next time to enter
Row system prompt, idle operating mode is entered if fault-free and is judged；
3) idle operating mode judges:According to BMS built-in functions, judge whether be now idle condition, basis for estimation is collection
To current signal non-zero, more than threshold value, unfinished equilibriums of BMS etc. set mark if one is set up for battery charge state change
Position BUSY is 1, is otherwise 0；
If 4) BUSY is 0, mean that system enters idle operating mode, start timer internal automatically into delayed sleep
Pattern, when delay time reaches 5 minutes, system thinks that electric motor car can for a long time rest on idle operating mode, then export Pulse low
Level, stops being powered for super capacitor, and software design patterns instruction allows system to enter park mode；
5) whether the rising edge for receiving wake-up signal INT_active or the communication for receiving CAN are judged whether
Flag bit BUSY, if one sets up triggering interrupts wake-up system, and is put 1 by signal；
6) repeat step 1 to 5；
7) BMS systems are thoroughly powered off.
The operation sequential of system is obtained as shown in Figure 4, system is introduced into charged state, completing idle operating mode in system judges
Disability Pulse information enters discharge lag awakening mode afterwards.
T0~t1：System is busy, and parameters detection is carried out to the battery in BMS, it is to avoid system is in long-time dormancy mould
Occur under formula abnormal；
T1~t2：System is idle, into the delay confirmation link of the time delay idle operating mode of the confirmation of 5 minutes；
t2：Disability Pulse signal entrance automatically wakens up link
T2~t3：If t3 links have foregoing outer triggering signal to come, system is waken up, and comes back to the t0 moment
State, Waveshape reproduction；
T2~t3：If triggered without other external signals waken up, obtain the decline triggering of super capacitor electricity and call out automatically
Wake up link, and super capacitor when charging output signal be height, when super-capacitor voltage is high output signal for low, output signal afterwards
Raised with the voltage reduction of super capacitor, finally trigger the high-level threshold 2V of MCU and trigger wake-up BMS；
t4：It is identical with the t0 moment, Waveshape reproduction.
Time span wherein in t2 to the t4 time periods is determined by the resistance of super capacitor and configuration.
The resistance that the utility model is used is 100k ranks in addition to R6, all, electric current within 10uA, and due to the pipe of D1
Pressure drop, the upper voltage limit 4.3V of super capacitor, voltage during triggering high-level threshold is about 3V, has the super capacitor capacitance to be again
1F, then can obtain delay time and be about 36 hours, realize interval and wake up, and the low work(of dormancy time circuit power consumption
Can, while it also avoid the loss that frequent starting brings.Above-mentioned parameter can be according to being actually adjusted.This programme is except being applied to
Other systems for there are identical standby needs are also suitable for outside the battery management system of electric automobile.
Above-described embodiment is the utility model preferably implementation method, but implementation method of the present utility model is not by above-mentioned
The limitation of embodiment, it is other it is any without departing from the change made under Spirit Essence of the present utility model and principle, modify, replace
Generation, combination, simplification, should be equivalent substitute mode, be included within protection domain of the present utility model.
Claims (10)
1. a kind of battery management system auto sleep and the circuit for waking up, it is characterised in that including BMS systems, electronic switch, super
Level capacitor charging circuit and automatic wake-up circuit；BMS systems include Pulse pins and INT_active pins；
The power input of electronic switch is connected with the power supply of BMS systems, the pulse input of electronic switch and the Pulse of BMS systems
Pin is connected, and the power supply output of electronic switch is connected with super capacitor charging circuit；The output of super capacitor charging circuit with from
Dynamic wake-up circuit is connected；The output of automatic wake-up circuit is connected to the INT_active pins of BMS systems；
It is super to rear class after the electronic switch receives the Pulse high level signals of BMS systems when system is in wake-up states
Level capacitor charging circuit is powered, and super capacitor charges, automatic wake-up circuit output signal INT_active, and magnitude of voltage is close to super
Capacitance voltage；Otherwise, system sends Pulse low level signals, and super capacitor charging circuit stops being charged for super capacitor, system
Into resting state；Automatic wake-up circuit output signal INT_active is initially low level, and electric capacity constantly discharges, and calls out automatically
The circuit output signal INT_active that wakes up gradually rises, until more than certain threshold value, waking up BMS systems.
2. battery management system auto sleep according to claim 1 with wake up circuit, it is characterised in that the electronics
Switch includes the first triode, the 4th triode and 3rd resistor, the 6th resistance, the transistor emitter of PNP pipe first and BMS systems
The power supply connection of system, between the first transistor base and emitter stage and connects 3rd resistor, the first transistor collector and super electricity
The input of capacity charge circuit is connected, and base stage is connected with the colelctor electrode of the triode of NPN pipes the 4th, and the base stage of the 4th triode is led to
Cross the 6th resistance to be connected with the Pulse pins of BMS systems, the 4th transistor emitter is connected to the ground.
3. battery management system auto sleep according to claim 1 with wake up circuit, it is characterised in that it is described super
Capacitor charging circuit includes diode and super capacitor, and the input of diode is connected with the output of electronic switch, diode
Output end is connected with the anode of super capacitor, and the negative terminal of super capacitor is connected to the ground.
4. battery management system auto sleep according to claim 3 with wake up circuit, it is characterised in that it is described super
Electric capacity uses the super capacitor of 1F/5.5V.
5. battery management system auto sleep according to claim 1 and the circuit for waking up, it is characterised in that described automatic
Wake-up circuit includes the 3rd triode, the second triode, the 5th triode and the 7th resistance, first resistor, the 8th resistance, the 4th
Resistance；3rd triode selects PNP pipe, and the 3rd transistor base is connected to the ground by the 7th resistance, and remittance is connected to super capacitor
The input of charging circuit, the 3rd transistor emitter is connected by the 4th resistance with the output end of super capacitor charging circuit,
3rd transistor collector is connected by the 8th resistance eutral grounding and with the base stage of the triode of NPN pipes the 5th, the 5th triode
Colelctor electrode is connected with the base stage of the triode of PNP pipe second, and the emitter stage of the second triode is filled by first resistor with super capacitor
The output end of circuit is connected, and the second transistor collector is connected to the ground, and the base signal output of the second triode is arrived
The INT_active pins of BMS systems.
6. battery management system auto sleep according to claim 1 with wake up circuit, it is characterised in that the battery
Management system auto sleep also includes vibration detection circuit and/or ignition signal circuit, vibration detection circuit with the circuit for waking up
And/or ignition signal circuit in parallel be linked into the output end of super capacitor charging circuit and automatic wake-up circuit output end it
Between；When being given a shock, vibration detection circuit conducting, INT_active voltages rise, or ignition signal is when transmitting, igniting letter
Number circuit turn-on, INT_active signal voltages rise, and INT_active signal voltages then wake up BMS systems more than threshold value.
7. battery management system auto sleep according to claim 6 with wake up circuit, it is characterised in that the vibration
Detection circuit is connected after being connected by vibroswitch and second resistance with the output end of super capacitor charging circuit, and lower end
It is connected with INT_active pins.
8. battery management system auto sleep according to claim 6 with wake up circuit, it is characterised in that the igniting
Signal circuit with the output end of super capacitor charging circuit after ignition switch and the 5th resistant series by being connected, and lower end
It is connected with INT_active pins.
9. battery management system auto sleep according to claim 1 with wake up circuit, it is characterised in that the BMS
System also includes the drive signal interface of CAN signaling interface and/or relay.
10. the battery management system auto sleep according to claim 2 or 5 with wake up circuit, it is characterised in that electricity
NPN pipes can be replaced with Nmos pipes in road, and PNP pipe can be replaced with Pmos.
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2016
- 2016-12-02 CN CN201621320117.9U patent/CN206264804U/en not_active Expired - Fee Related
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