CN206336142U - Battery management system - Google Patents
Battery management system Download PDFInfo
- Publication number
- CN206336142U CN206336142U CN201621193464.XU CN201621193464U CN206336142U CN 206336142 U CN206336142 U CN 206336142U CN 201621193464 U CN201621193464 U CN 201621193464U CN 206336142 U CN206336142 U CN 206336142U
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- Prior art keywords
- power supply
- modular converter
- electronic switch
- micro
- external power
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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
Abstract
A kind of battery management system includes main control module and the power supply circuit powered to the main control module.The main control module includes micro-control unit, and the power supply circuit includes switch module, first voltage modular converter and second voltage modular converter.When the micro-control unit is not received by charging signals, discharge signal and wake-up signal, switch module described in the micro-control unit controls disconnects, external power supply is not powered to the first voltage modular converter, the first voltage modular converter is not powered to the main control module, and the micro-control unit enters resting state.When the micro-control unit receives the charging signals, the discharge signal or the wake-up signal, switch module described in the micro-control unit controls is closed, the external power supply is powered by the switch module to the first voltage modular converter, and the first voltage modular converter is powered to the main control module.Above-mentioned battery management system low-power consumption and with automatic wake-up function.
Description
【Technical field】
The utility model is related to electric vehicle engineering field, more particularly to a kind of battery management system applied to electric automobile
System.
【Background technology】
At present, the BMS (Battery Management System, battery management system) of electric automobile is not generally low
Power consumption mode, therefore, BMS main control module can not connect normal electricity.When without using electric automobile, BMS main control module power-off is not
Work, the battery bag of electric automobile is in runaway condition.When electric automobile it is long-term without using when, battery bag is chronically at shape out of control
State, easily triggers security incident.
In view of the foregoing, it is necessary to provide a kind of new battery management system to overcome disadvantages described above in fact.
【The content of the invention】
The purpose of this utility model is to provide a kind of low-power consumption and the battery management system with automatic wake-up function.
To achieve these goals, the utility model provides a kind of battery management system, and the battery management system includes
Main control module and the power supply circuit powered to the main control module, the main control module include micro-control unit, the power supply electricity
Road include switch module, first voltage modular converter and second voltage modular converter, the first voltage modular converter with it is described
Main control module is connected, and is connected by the switch module with external power supply, the second voltage modular converter with it is described external
Power supply and the micro-control unit are connected, and the micro-control unit is connected with the switch module, the first voltage modulus of conversion
Block is powered by the plurality of voltages needed for the voltage conversion of the external power supply into the main control module, and for the main control module,
Voltage needed for the voltage conversion of the external power supply into the micro-control unit is institute by the second voltage modular converter
Micro-control unit is stated to power, it is described when the micro-control unit is not received by charging signals, discharge signal and wake-up signal
Switch module described in micro-control unit controls is disconnected, and the external power supply is not powered to the first voltage modular converter, described
First voltage modular converter is not powered to the main control module, and the micro-control unit enters resting state, when the microcontroller
When unit receives the charging signals, the discharge signal or the wake-up signal, opened described in the micro-control unit controls
Module closure is closed, the external power supply is powered by the switch module to the first voltage modular converter, first electricity
Pressure modular converter is powered to the main control module.
Further, the switch module includes the first photo-coupler and the first electronic switch, first photo-coupler
Including the first light-emitting component and the first photo detector, the first end of first light-emitting component is connected with the micro-control unit,
To receive the control signal of the micro-control unit output, the second end of first light-emitting component is grounded by first resistor,
The first end of first photo detector is connected with the first end of first electronic switch, and by second resistance with it is described outer
The positive pole for connecing power supply is connected, and the second end of first photo detector passes through 3rd resistor and the negative pole phase of the external power supply
Even, the second end of first electronic switch is connected with the first voltage modular converter, and the 3rd of first electronic switch the
End is connected with the positive pole of the external power supply, when the first light-emitting component described in the micro-control unit controls lights, and described the
One photo detector is turned on, first electronic switch conducting, and the external power supply is by first electronic switch to described the
One voltage transformation module is powered.
Further, first light-emitting component is light emitting diode, the first end and second of first light-emitting component
End respectively correspond to the light emitting diode anode and negative electrode, first photo detector be phototriode, described first by
The first end of optical element and the second end correspond to the colelctor electrode and emitter stage of the phototriode respectively.
Further, first electronic switch is PMOS FETs, the first end of first electronic switch, second
End and the 3rd end correspond to grid, drain electrode and the source electrode of PMOS FETs respectively.
Further, the first voltage modular converter includes transformer and rectification unit, and the transformer includes primary
Coil and secondary coil, the rectification unit include the first diode, the first end of the primary coil and first electronics
Second end of switch is connected, and the second end of the primary coil is connected with the negative pole of the external power supply, the secondary coil
First end is connected with the anode of first diode, and the second end of the secondary coil is connected with the main control module, described
The negative electrode of first diode is connected with the main control module.
Further, the rectification unit also includes the first electric capacity and the 4th resistance, first electric capacity and the described 4th
Resistor coupled in parallel is between the negative electrode of first diode and the second end of the secondary coil.
Further, the first voltage modular converter also includes control chip, feedback unit and the second electronic switch, institute
State control chip with the switch module, the feedback unit and second electronic switch to be connected, the of the primary coil
Two ends are connected by second electronic switch with the negative pole of the external power supply, and the control chip is according to what is received
Switch module output signal and the feedback unit feedback signal come control second electronic switch conducting and cut
Only frequency.
Further, the feedback unit includes the second photo-coupler and three terminal regulator, the second photo-coupler bag
The second light-emitting component and the second photo detector are included, the first end of second light-emitting component passes through the 5th resistance and the described 1st
The negative electrode of pole pipe is connected, and the second end of second light-emitting component is connected with the negative electrode of the three terminal regulator, and three end is steady
The anode of depressor is connected with the second end of the secondary coil, the reference edge of the three terminal regulator by the 6th resistance with it is described
The negative electrode of first diode is connected, and is connected by the 7th resistance with the second end of the secondary coil, the second light member
The first end of part is connected by the 8th resistance with the first power supply, and is connected by the second electric capacity with the negative pole of the external power supply,
Second end of second photo detector is connected with the negative pole of the external power supply, and passes through the 9th resistance and the control chip
It is connected.
Further, the control chip includes input pin, feedback pin and output pin, the input pin and institute
State switch module to be connected, the feedback pin is connected by the 9th resistance with the second end of second photo detector, institute
Output pin is stated by the tenth resistance with the first end of second electronic switch to be connected, and by the 11st resistance with it is described outer
The negative pole for connecing power supply is connected, and the second end of second electronic switch is connected with the second end of the primary coil, and described second
3rd end of electronic switch is connected with the feedback pin, output pin output pulse width modulated signal control described the
The conducting and cut-off of two electronic switches, the control chip is by adjusting the pulse width modulating signal that the output pin is exported
Dutycycle control conducting and the cut-off frequency of second electronic switch.
Further, the first voltage modular converter also include the second diode, the anode of second diode with
The negative electrode of first diode is connected, and the negative electrode of second diode is connected with the main control module.
Compared to prior art, the utility model is being not received by charging signals, electric discharge by the micro-control unit
When signal and wake-up signal, the switch module is controlled to disconnect, so as to control the first voltage modular converter to stop to described
Main control module is powered；And by the micro-control unit when receiving wake-up signal, the switch module closure is controlled, so that
Control the first voltage modular converter to be powered to the main control module so that the battery management system have low-power consumption and from
The dynamic function of waking up, and then make the battery management system when electric automobile is in long-term static condition, can periodically certainly
It is dynamic to wake up, and regularly the state to the battery bag is monitored, and the data monitored are sent to by communication module
Remote monitoring end, to ensure the safety of the electric automobile.
In addition, the utility model also by first photo-coupler and second photo-coupler to the transformer
Primary side and secondary carry out electrical isolation, thus improve the stability of signal in the battery management system, antijamming capability and
Accuracy.The utility model is also by setting second diode to prevent that voltage from pouring in down a chimney.
【Brief description of the drawings】
The theory diagram for the battery management system 10 that Fig. 1 provides for embodiment of the present utility model.
Fig. 2 is the circuit diagram of switch module 210 in Fig. 1.
Fig. 3 is the circuit diagram of first voltage modular converter 230 in Fig. 1.
【Embodiment】
In order that the purpose of this utility model, technical scheme and Advantageous Effects become apparent from understanding, below in conjunction with
Accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, and shows
So, described embodiment is only a part of embodiment of the utility model, rather than whole embodiments.It is new based on this practicality
Embodiment in type, the every other implementation that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example, belongs to the scope of the utility model protection.
When an element was considered as with another element " being connected ", it can be directly to another element or
It may be simultaneously present centering elements.Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to this reality
The implication being generally understood that with new those skilled in the art is identical.Made herein in specification of the present utility model
Term is intended merely to describe the purpose of specific embodiment, it is not intended that in limitation the utility model.
Referring to Fig. 1, the theory diagram for the battery management system 10 that Fig. 1 provides for embodiment of the present utility model.It is described
Battery management system 10 includes main control module 100 and the power supply circuit 200 powered to the main control module 100.The master control mould
Block 100 includes MCU (Micro Controller Unit, micro-control unit) 120.The power supply circuit 200 includes switch module
210th, first voltage modular converter 230 and second voltage modular converter 250.The first voltage modular converter 230 and the master
Control module 100 to be connected, and be connected by the switch module 210 with external power supply 260.The second voltage modular converter 250
It is connected with the external power supply 260 and the MCU 120, the MCU 120 is connected with the switch module 210.
The first voltage modular converter 230 is by the voltage conversion of the external power supply 260 into the institute of main control module 100
The plurality of voltages needed, and powered for the main control module 100.The second voltage modular converter 250 is by the external power supply 260
Voltage conversion into the MCU 120 needed for voltage, and powered for the MCU 120.When the MCU 120 is not received by
When charging signals, discharge signal and wake-up signal, the MCU 120 controls the switch module 210 to disconnect, the external power supply
260 do not power to the first voltage modular converter 230, and the first voltage modular converter 230 does not give the main control module 100
Power supply, the MCU 120 enters resting state.When the MCU 120 receives the charging signals, the discharge signal or institute
When stating wake-up signal, the MCU 120 controls the switch module 210 to close, and the external power supply 260 passes through the switching molding
Block 210 is powered to the first voltage modular converter 230, and the first voltage modular converter 230 is supplied to the main control module 100
Electricity.
Referring to Fig. 2, the circuit diagram for the switch module 210 that Fig. 2 provides for embodiment of the present utility model.The switching molding
Block 210 includes the first photo-coupler 216 and the first electronic switch Q1.First photo-coupler 216 includes the first light-emitting component
E1 and the first photo detector P1.The first end of first light-emitting element E 1 is connected with the MCU 120, to receive the MCU
The control signal of 120 outputs, the second end of first light-emitting element E 1 is grounded by first resistor R1.The first light member
Part P1 first end is connected with the first end of the first electronic switch Q1, and passes through second resistance R2 and the external power supply
260 positive pole Vin+ is connected.The second end of the first photo detector P1 passes through 3rd resistor R3 and the external power supply 260
Negative pole Vin- is connected.The second end of the first electronic switch Q1 is connected with the first voltage modular converter 230, and described first
Electronic switch Q1 the 3rd end is connected with the positive pole Vin+ of the external power supply 260.When the MCU 120 controls first hair
When optical element E1 lights, the first photo detector P1 conductings, the first electronic switch Q1 conductings, the external power supply 260
Powered by the first electronic switch Q1 to the first voltage modular converter 230.
In the present embodiment, first light-emitting element E 1 is light emitting diode, the of first light-emitting element E 1
One end and the second end correspond to the anode and negative electrode of the light emitting diode respectively.The first photo detector P1 is photosensitive three pole
Pipe, the first end of the first photo detector P1 and the second end correspond to the colelctor electrode and emitter stage of the phototriode respectively.
In the present embodiment, the first electronic switch Q1 is PMOS FETs, the first electronic switch Q1's
First end, the second end and the 3rd end correspond to grid, drain electrode and the source electrode of PMOS FETs respectively.In other embodiments,
The first electronic switch Q1 can be other switches with similar functions, such as PNP type triode and IGBT (Insulated
Gate Bipolar Transistor, insulated gate bipolar transistor) etc..
Referring to Fig. 3, the circuit diagram for the first voltage modular converter 230 that Fig. 3 provides for embodiment of the present utility model.Institute
Stating first voltage modular converter 230 includes transformer T1 and rectification unit 231, and the transformer T1 includes primary coil L1 and secondary
Level coil L2, the rectification unit 231 includes the first diode D1.The first end of the primary coil L1 and first electronics
The second end for switching Q1 is connected, and the second end of the primary coil L1 is connected with the negative pole Vin- of the external power supply 260.It is described
Secondary coil L2 first end is connected with the anode of the first diode D1, the second end and the master of the secondary coil L2
Module 100 is controlled to be connected.The negative electrode of the first diode D1 is connected with the main control module 100.In the present embodiment, it is described
The AC rectification that first diode D1 is used to export the transformer T1 is direct current.
In the present embodiment, the rectification unit 231 also includes the first electric capacity C1 and the 4th resistance R4, first electricity
Hold C1 and the 4th resistance R4 to be connected in parallel between the negative electrode of the first diode D1 and the second end of the secondary coil L2.
The first voltage modular converter 230 also includes the second diode D2, the anode of the second diode D2 and institute
The negative electrode for stating the first diode D1 is connected, and the negative electrode of the second diode D2 is connected with the main control module 100.In this implementation
In mode, the second diode D2 is used to prevent that voltage from pouring in down a chimney.
The first voltage modular converter 230 also includes control chip U1, the electronic switch Q2 of feedback unit 233 and second.
The control chip U1 is connected with the switch module 210, the feedback unit 233 and the second electronic switch Q2.It is described
Primary coil L1 the second end is connected by the second electronic switch Q2 with the negative pole Vin- of the external power supply 260, described
The signal that the signal and the feedback unit 233 that control chip U1 is exported according to the switch module 210 received feed back
To control conducting and the cut-off frequency of the second electronic switch Q2.
In the present embodiment, the second electronic switch Q2 is NMOS FETs, the second electronic switch Q2's
First end, the second end and the 3rd end correspond to grid, drain electrode and the source electrode of the NMOS FETs respectively.In other embodiment
In, the second electronic switch Q2 can be other switches with similar functions, such as NPN type triode and IGBT.
The feedback unit 233 includes the second photo-coupler 235 and three terminal regulator Q3.Second photo-coupler 235
Including the second light-emitting element E 2 and the second photo detector P2.The first end of second light-emitting element E 2 by the 5th resistance R5 with
The negative electrode of the first diode D1 is connected, the second end of second light-emitting element E 2 and the negative electrode of the three terminal regulator Q3
It is connected.The anode of the three terminal regulator Q3 is connected with the second end of the secondary coil L2, the ginseng of the three terminal regulator Q3
Examine end by the 6th resistance R6 with the negative electrode of the first diode D1 to be connected, and pass through the 7th resistance R7 and the secondary coil
L2 the second end is connected.The first end of the second photo detector P2 is connected by the 8th resistance R8 with the first power supply V1, and is led to
The negative pole Vin- that the second electric capacity C2 is crossed with the external power supply 260 is connected.The second end of the second photo detector P2 with it is described
The negative pole Vin- of external power supply 260 is connected, and is connected by the 9th resistance R9 with the control chip U1.
In the present embodiment, second light-emitting element E 2 is light emitting diode, the of second light-emitting element E 2
One end and the second end correspond to the anode and negative electrode of the light emitting diode respectively, and the second photo detector P2 is photosensitive three pole
Pipe, the first end of the second photo detector P2 and the second end correspond to the colelctor electrode and emitter stage of the phototriode respectively.
The control chip U1 includes input pin VIN, feedback pin CS and output pin OUT.The input pin VIN
It is connected with the switch module 210, the feedback pin CS passes through the 9th resistance R9's and the second photo detector P2
Second end is connected.The output pin OUT is connected by the tenth resistance R10 with the first end of the second electronic switch Q2, and
It is connected by the 11st resistance R11 with the negative pole Vin- of the external power supply 260.The second end of the second electronic switch Q2 with
The second end of the primary coil L1 is connected, and the 3rd end of the second electronic switch Q2 is connected with the feedback pin CS.Institute
State conducting and cut-off that output pin OUT output pulse widths modulated signal controls the second electronic switch Q2, the control
Chip U1 controls second electronics by adjusting the dutycycle for the pulse width modulating signal that the output pin OUT is exported
Switch Q2 conducting and cut-off frequency.
In the present embodiment, the control chip U1 also includes under-voltage protection pin UVLO, timing resistor pin RT, electricity
Source pin VCC and grounding pin GND.The under-voltage protection pin UVLO passes through the 12nd resistance R12 and the input pin VIN
It is connected, and is connected by the 13rd resistance R13 with the negative pole Vin- of the external power supply 260.The timing resistor pin RT leads to
The negative pole Vin- that the 14th resistance R14 is crossed with the external power supply 260 is connected.The power pins VCC and first power supply
V1 is connected, and the grounding pin GND is connected with the negative pole Vin- of the external power supply 260.
In the present embodiment, the circuit structure of the second voltage modular converter 250 and the first voltage modulus of conversion
The circuit structure of block 230 is similar, will not be repeated here.The second voltage modular converter 250 and the first voltage modulus of conversion
The difference of block 230 is：The primary coil L1 of transformer T1 in the second voltage modular converter 250 first end with it is described
The positive pole Vin+ of external power supply 260 is connected.
The operation principle to the utility model battery management system 10 is illustrated below.
When the MCU 120 receives charging signals, discharge signal or wake-up signal, the controls of MCU 120 are sent
Control signal controls first light-emitting element E 1 to light, the first photo detector P1 conductings, the first electronic switch Q1
Conducting, the positive pole Vin+ of the external power supply 260 is powered by the first electronic switch Q1 to the transformer T1.It is described whole
The AC rectification that stream unit 231 exports the transformer T1 is direct current, and gives the master control by the direct current electricity output
All electronic components work in module 100, the main control module 100, so as to monitor the state of battery bag in electric automobile.
The Voltage Feedback that the feedback unit 233 exports the rectification unit 231 gives the control chip U1, the control
Coremaking piece U1 is exported to the pulse width modulating signal of the second electronic switch Q2 according to the feedback signal received, adjustment
Dutycycle, so as to adjust the voltage of the alternating current of the transformer T1 outputs, and then adjusts the electricity that the rectification unit 231 is exported
Pressure.It follows that the feedback unit 233 and the control chip U1 be for according to the rectification unit 231 export it is anti-
Feedthrough voltage adjusts the input voltage of the transformer T1, so that the voltage of the first voltage modular converter 230 output
Accuracy is higher, can more meet the voltage requirements of the main control module 100.
When the MCU 120 is not received by charging signals, discharge signal and wake-up signal, the MCU 120 is controlled
Sending control signal controls first light-emitting element E 1 not light, the first photo detector P1 cut-offs, first electronics
Q1 cut-offs are switched, the positive pole Vin+ of the external power supply 260 can not give the transformer T1 by the first electronic switch Q1
Power supply, the transformer T1 is without output, and the rectification unit 231 is not powered to the main control module 100.The second voltage turns
Mold changing block 250 is powered to the MCU 120 always, the electronic component in the main control module 100 in addition to the MCU 120
Do not work, the MCU 120 enters resting state, so as to further save electric energy.
When the MCU 120 receives the wake-up signal, the MCU 120 wakes up, and controls the switch module 210
Closure, the first voltage modular converter 230 is powered to the main control module 100, so that the battery management system 10 exists
When the electric automobile is in long-term static condition, can periodically it automatically wake up, and the regularly state to the battery bag
It is monitored, and the data monitored is sent to remote monitoring end by communication module, ensures the peace of the electric automobile
Entirely.
It is appreciated that the wake-up signal can be sent by the timing wake-up module in electric automobile, the timing wake-up
Module includes realizing the hardware circuit and/or software program of timing wake-up function.
It is appreciated that when needing the battery bag to electric automobile to charge, the battery management system 10 needs prison
The state of the battery bag is controlled, the MCU 120 receives charging signals.When electric automobile is in running status, the electricity
Chi Bao discharges, and the battery management system 10 needs to monitor the state of the battery bag, and the MCU 120 receives charging letter
Number.When the MCU 120 does not receive charging signals and discharge signal, show that the electric automobile is in static condition, institute
The state that battery management system 10 is not required to monitor the battery bag always is stated, only the state of the battery bag need to be regularly monitored i.e.
Can, therefore, the main control module 100 need not be constantly in working condition consumption electric energy, only need timing in running order, from
And electric energy is saved, realize the function of low-power consumption.
The utility model, when being not received by charging signals, discharge signal and wake-up signal, is controlled by the MCU 120
Make the switch module 210 to disconnect, so as to control the first voltage modular converter 230 to stop supplying to the main control module 100
Electricity；And by the MCU 120 when receiving wake-up signal, control the switch module 210 to close, so as to control described the
One voltage transformation module 230 is powered to the main control module 100, so that the battery management system 10 has low-power consumption and automatic
The function of wake-up, and then make the battery management system 10 when electric automobile is in long-term static condition, can periodically certainly
It is dynamic to wake up, and regularly the state to the battery bag is monitored, and the data monitored are sent to by communication module
Remote monitoring end, to ensure the safety of the electric automobile.
In addition, the utility model also becomes by the way that 235 pairs of first photo-coupler 216 and second photo-coupler are described
Depressor T1 primary side and secondary carries out electrical isolation, so as to improve the stability of signal in the battery management system 10, resist
Interference performance and accuracy.The utility model is also by setting the second diode D2 to prevent that voltage from pouring in down a chimney.
The utility model is not restricted to described in description and embodiments, thus for familiar field personnel and
Additional advantage and modification is easily achieved in speech, therefore in the universal limited without departing substantially from claim and equivalency range
In the case of spirit and scope, the utility model be not limited to specific details, representational equipment and shown here as with description
Examples shown.
Claims (10)
1. a kind of battery management system, it is characterised in that：The battery management system includes main control module and to the master control mould
The power supply circuit that block is powered, the main control module includes micro-control unit, and the power supply circuit includes switch module, first voltage
Modular converter and second voltage modular converter, the first voltage modular converter are connected with the main control module, and by described
Switch module is connected with external power supply, the second voltage modular converter and the external power supply and the micro-control unit phase
Even, the micro-control unit is connected with the switch module, and the first voltage modular converter is by the voltage of the external power supply
The plurality of voltages needed for the main control module is converted into, and is powered for the main control module, the second voltage modular converter will
Voltage needed for the voltage conversion of the external power supply into the micro-control unit, and powered for the micro-control unit, work as institute
When stating micro-control unit and being not received by charging signals, discharge signal and wake-up signal, opened described in the micro-control unit controls
Close module to disconnect, the external power supply is not powered to the first voltage modular converter, and the first voltage modular converter is not given
The main control module is powered, and the micro-control unit enters resting state, when the micro-control unit receives the charging letter
Number, the discharge signal or during the wake-up signal, switch module described in the micro-control unit controls is closed, the external electricity
Source is powered by the switch module to the first voltage modular converter, and the first voltage modular converter gives the master control mould
Block is powered.
2. battery management system as claimed in claim 1, it is characterised in that：The switch module include the first photo-coupler and
First electronic switch, first photo-coupler includes the first light-emitting component and the first photo detector, first light-emitting component
First end be connected with the micro-control unit, to receive the control signal of micro-control unit output, described first lights
Second end of element is grounded by first resistor, the first end of first photo detector and the first of first electronic switch
End is connected, and is connected by second resistance with the positive pole of the external power supply, and the second end of first photo detector passes through the
Three resistance are connected with the negative pole of the external power supply, the second end of first electronic switch and the first voltage modular converter
It is connected, the 3rd end of first electronic switch is connected with the positive pole of the external power supply, when the micro-control unit controls institute
State the first light-emitting component it is luminous when, the first photo detector conducting, the first electronic switch conducting, the external power supply leads to
First electronic switch is crossed to power to the first voltage modular converter.
3. battery management system as claimed in claim 2, it is characterised in that：First light-emitting component is light emitting diode,
The first end of first light-emitting component and the second end correspond to the anode and negative electrode of the light emitting diode respectively, described first by
Optical element is phototriode, and the first end of first photo detector and the second end correspond to the collection of the phototriode respectively
Electrode and emitter stage.
4. battery management system as claimed in claim 2, it is characterised in that：First electronic switch is PMOS field-effects
Pipe, first end, the second end and the 3rd end of first electronic switch correspond to grid, drain electrode and the source of PMOS FETs respectively
Pole.
5. battery management system as claimed in claim 2, it is characterised in that：The first voltage modular converter includes transformer
And rectification unit, the transformer include primary coil and secondary coil, the rectification unit include the first diode, it is described just
The first end of level coil is connected with the second end of first electronic switch, the second end of the primary coil and the external electricity
The negative pole in source is connected, and the first end of the secondary coil is connected with the anode of first diode, and the of the secondary coil
Two ends are connected with the main control module, and the negative electrode of first diode is connected with the main control module.
6. battery management system as claimed in claim 5, it is characterised in that：The rectification unit also includes the first electric capacity and the
Four resistance, first electric capacity and the 4th resistor coupled in parallel first diode negative electrode and the secondary coil
Between two ends.
7. battery management system as claimed in claim 5, it is characterised in that：The first voltage modular converter also includes control
Chip, feedback unit and the second electronic switch, the control chip and the switch module, the feedback unit and described second
Electronic switch is connected, the negative pole phase that the second end of the primary coil passes through second electronic switch and the external power supply
Even, the control chip according to receive the switch module output signal and the feedback unit feedback signal come
Control conducting and the cut-off frequency of second electronic switch.
8. battery management system as claimed in claim 7, it is characterised in that：The feedback unit include the second photo-coupler and
Three terminal regulator, second photo-coupler includes the second light-emitting component and the second photo detector, second light-emitting component
First end is connected by the 5th resistance with the negative electrode of first diode, the second end of second light-emitting component and described three
The negative electrode of voltage-stablizer is held to be connected, the anode of the three terminal regulator is connected with the second end of the secondary coil, and three end is steady
The reference edge of depressor is connected by the 6th resistance with the negative electrode of first diode, and passes through the 7th resistance and the secondary wire
Second end of circle is connected, and the first end of second photo detector is connected by the 8th resistance with the first power supply, and passes through second
Electric capacity is connected with the negative pole of the external power supply, the second end of second photo detector and the negative pole phase of the external power supply
Even, and it is connected by the 9th resistance with the control chip.
9. battery management system as claimed in claim 8, it is characterised in that：The control chip includes input pin, feedback
Pin and output pin, the input pin are connected with the switch module, the feedback pin by the 9th resistance with
Second end of second photo detector is connected, and the output pin passes through the tenth resistance and the first of second electronic switch
End is connected, and is connected by the 11st resistance with the negative pole of the external power supply, the second end of second electronic switch and institute
The second end for stating primary coil is connected, and the 3rd end of second electronic switch is connected with the feedback pin, and the output is drawn
Pin output pulse width modulated signal controls the conducting and cut-off of second electronic switch, and the control chip is by adjusting
The dutycycle for the pulse width modulating signal that output pin is exported is stated to control conducting and the cutoff frequency of second electronic switch
Rate.
10. battery management system as claimed in claim 5, it is characterised in that：The first voltage modular converter also includes the
Two diodes, the anode of second diode is connected with the negative electrode of first diode, the negative electrode of second diode
It is connected with the main control module.
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| CN107933316A (en) * | 2017-11-16 | 2018-04-20 | 宁德时代新能源科技股份有限公司 | Power transmission circuit, method, device, vehicle and computer readable medium |
| CN108215912A (en) * | 2018-01-24 | 2018-06-29 | 安徽锐能科技有限公司 | For the control circuit and control system of electric vehicle |
| CN109391136A (en) * | 2017-08-02 | 2019-02-26 | 郑州宇通客车股份有限公司 | A kind of DC/DC converter wakes up system, vehicle low-voltage power supply system and vehicle |
| CN110254290A (en) * | 2019-06-21 | 2019-09-20 | 惠州市亿兆能源科技有限公司 | BMS battery management communication system |
| CN110574217A (en) * | 2017-11-07 | 2019-12-13 | 株式会社Lg化学 | BMS awakens equipment, and including BMS and group battery of this BMS awakens equipment up |
| CN110626206A (en) * | 2018-05-31 | 2019-12-31 | 宁德时代新能源科技股份有限公司 | Charging wake-up device and battery system |
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| CN111976539B (en) * | 2020-07-23 | 2022-01-21 | 蜂巢能源科技有限公司 | Method, apparatus, medium, and device for determining voltage change rate of battery |
| CN113890158A (en) * | 2021-10-26 | 2022-01-04 | 东莞新能德科技有限公司 | Battery energy-saving circuit and electronic equipment |
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