CN106828136A - The control circuit of battery management system, battery management system and electric vehicle - Google Patents
The control circuit of battery management system, battery management system and electric vehicle Download PDFInfo
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- CN106828136A CN106828136A CN201611008173.3A CN201611008173A CN106828136A CN 106828136 A CN106828136 A CN 106828136A CN 201611008173 A CN201611008173 A CN 201611008173A CN 106828136 A CN106828136 A CN 106828136A
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- management system
- battery management
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
-
- 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
The present invention relates to field of circuit technology, disclose control circuit, battery management system and the electric vehicle of a kind of battery management system, solve BMS enter resting state when, the state parameter at electric moment under cannot being stored before lower electricity, and carry out information exchange, also cannot other controllers of advance notice its power-down states problem.The control circuit includes：Signal deteching circuit, detects for the input state to key signal；And electric circuit under time delay, for when the signal deteching circuit detects key signal power down, in the given time for battery management system is powered, and at the end of the scheduled time, stop being powered for the battery management system.The embodiment of the present invention is under the time delay of battery management system the processing procedure of electricity.
Description
Technical field
The present invention relates to field of circuit technology, more particularly to a kind of battery management system control circuit, battery management system
System and electric vehicle.
Background technology
During battery management system (Battery Management System, BMS) is the intelligence of electric vehicle powertrain
Pivot, in electric vehicle running, its to battery physical parameter real-time monitoring and storage, state estimation, inline diagnosis with it is pre-
Alert, Power Control simultaneously carries out data interaction with vehicle other control system.
On electric vehicle, BMS is typically powered by vehicle-mounted lead-acid accumulator, and suspended state is entered in electric vehicle
When, in order to reduce power consumption, BMS can enter resting state.After BMS initial power-ons, can be realized in hundreds of milliseconds to battery and from
The detection of body state and judgement, and enter normal operating conditions；But when resting state is entered, BMS powers can directly be disconnected,
Under this state, BMS cannot be stored before lower electricity under the electric moment state parameter, and carry out information exchange, cannot also carry
Before inform other controllers its power-down states.
The content of the invention
Embodiments of the invention provide a kind of control circuit of battery management system, battery management system and electric vehicle,
BMS is solved when resting state is entered, it is impossible to the state parameter at electric moment under being stored before lower electricity, and enter row information friendship
Mutually, also cannot other controllers of advance notice its power-down states problem.
To reach above-mentioned purpose, the present invention is adopted the following technical scheme that：
Embodiments of the invention provide a kind of control circuit of battery management system, including：Signal deteching circuit, for right
The input state of key signal is detected；And electric circuit under time delay, for detecting key when the signal deteching circuit
During signal power down, in the given time for battery management system is powered, and at the end of the scheduled time, it is the electricity to stop
Pond management system is powered.
Further, the signal deteching circuit includes：The positive pole input of diode D1, wherein diode D1 is believed for key
Number, negative pole is connected with the battery management system；Divider resistance R1 and R2, wherein one end of divider resistance R1 are with diode D1's
Positive pole is connected, and the other end of divider resistance R1 is connected ground connection with divider resistance R2；The of photo-coupler U1, wherein photo-coupler U1
One input and the second input are connected to the two ends of divider resistance R2, and the 3rd input connects the first power supply, output end
It is the output end of the signal deteching circuit；And resistance R3, wherein resistance R3 one end is connected with the output end of photo-coupler U1,
The other end is grounded.
Further, the signal deteching circuit also includes filter capacitor C1, wherein filter capacitor C1 and divider resistance R2
It is in parallel.
Further, when electricity on the key signal, diode D1 is turned on and for the battery management system is powered, light
Coupler U1 is turned on, and the magnitude of voltage of resistance R3 is raised, the output end output high level of the signal deteching circuit；When the key
During signal power down, diode D1 ends and stops being powered for the battery management system, photo-coupler U1 cut-offs, the electricity of resistance R3
Pressure value is zero, the output end output low level of the signal deteching circuit.
Further, electric circuit includes under the time delay：First transistor switching circuit, wherein first triode is opened
Powered-down road includes triode Q2, and the triode Q2 base stage be electric circuit under the time delay input, grounded emitter；
The first input end connection second source of photo-coupler U2, wherein photo-coupler U2, the collection of the second input connecting triode Q2
Electrode, the 3rd input connects the 3rd power supply；Second transistor switching circuit, wherein second transistor switching circuit includes
Triode Q1, and the base stage connection photo-coupler U2 of the triode Q1 output end, grounded emitter；And relay
Input connection the 3rd power supply of RL1A, its repeat circuit RL1A, the colelctor electrode of the first output end connecting triode Q1, the
Two output ends connect the battery management system.
Further, electric circuit also includes under the time delay：The positive pole connection described the of diode D2, wherein diode D2
Three power supplys, the input of negative pole connection relay RL1A；And the positive pole connection relay of diode D3, wherein diode D3
First output end of RL1A, negative pole connection relay RL1 inputs.
Further, first transistor switching circuit also includes：Divider resistance R7 and R8, wherein divider resistance R7 connect
It is connected between the base stage of triode Q2 and emitter stage, divider resistance R8 is series at electricity electricity under the base stage of triode Q2 and the time delay
Between the input on road；And current-limiting resistance R6, wherein current-limiting resistance R6 are series at the colelctor electrode and photo-coupler of triode Q2
Between second input of U2；Second transistor switching circuit also includes：Divider resistance R4 and R5, wherein divider resistance R4
It is connected between the base stage of triode Q1 and emitter stage, divider resistance R5 is series at the base stage and photo-coupler U2 of triode Q1
Between output end.
Further, it is described within the scheduled time when the signal deteching circuit detects key signal power down
The input of electric circuit is set to high level under time delay, and the first transistor switching circuit conducting, photo-coupler U2 conductings are described
Second source drives the second transistor switching circuit conducting, drives relay RL1A conductings, and relay RL1A the 3rd is exported
Hold as the battery management system is powered；At the end of the scheduled time, the input of electric circuit is set to low under the time delay
Level, the first transistor switching circuit cut-off, photo-coupler U2 cut-offs, the second transistor switching circuit cut-off, after
Electrical equipment RL1A ends, and stops being powered for the battery management system.
Embodiments of the invention also provide a kind of battery management system, and the battery management system includes：
The control circuit of above-mentioned battery management system；And control device, for being detected when the signal deteching circuit
During key signal power down, the input of electric circuit under the time delay is set to high level in the given time, and carry out following behaviour
At least one of make：Store state parameter, information exchange or the state control of the battery management system；It is additionally operable to when described
At the end of the scheduled time, the input of electric circuit under the time delay is set to low level.
Embodiments of the invention also provide a kind of electric vehicle, and the electric vehicle includes above-mentioned battery management system.
By above-mentioned technical proposal, the input state of key signal is detected using signal deteching circuit, work as detection
When key signal power down, in the given time for battery management system is powered, and at the end of the scheduled time, stop be
The battery management system is powered, and solves BMS when resting state is entered, it is impossible to the shape at electric moment under being stored before lower electricity
State parameter, and carry out information exchange, also cannot other controllers of advance notice its power-down states problem, realize electronic
Under vehicle during electricity, BMS can carry out lower electricity and prepare, and improve vehicle performance.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Accompanying drawing is, for providing a further understanding of the present invention, and to constitute the part of specification, with following tool
Body implementation method is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is a kind of schematic diagram of the control circuit of battery management system provided in an embodiment of the present invention；
Fig. 2 is a kind of circuit diagram of signal deteching circuit provided in an embodiment of the present invention；
Fig. 3 is the circuit diagram of another signal deteching circuit provided in an embodiment of the present invention；
Fig. 4 is the circuit diagram of electric circuit under a kind of time delay provided in an embodiment of the present invention；
Fig. 5 is the circuit diagram of electric circuit under another time delay provided in an embodiment of the present invention；
Fig. 6 is the circuit diagram of electric circuit under another time delay provided in an embodiment of the present invention；
Fig. 7 is a kind of schematic diagram of battery management system provided in an embodiment of the present invention.
Specific embodiment
Specific embodiment of the invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to limit the invention.
A kind of control circuit of battery management system is the embodiment of the invention provides, as shown in figure 1, the control circuit bag
Electric circuit 12 under signal deteching circuit 11 and time delay is included, wherein the signal deteching circuit 11, for the input to key signal
State is detected；Electric circuit 12 under the time delay, for when the signal deteching circuit 11 detects key signal power down,
In the given time for battery management system is powered, and at the end of the scheduled time, it is the battery management system to stop
Power supply.
Wherein, as shown in Fig. 2 the signal deteching circuit 11 includes：
The positive pole input of diode D1, wherein diode D1 is key signal (Key), negative pole and the battery management system
Connection, is that the battery management system is powered, wherein key signal input is 12V, then for the battery management system is supplied
Electric 12V；
Divider resistance R1 and R2, wherein one end of divider resistance R1 are connected with the positive pole of diode D1, divider resistance R1's
The other end is connected ground connection with divider resistance R2；
Photo-coupler U1, the wherein first input end of photo-coupler U1 and the second input are connected to divider resistance R2
Two ends, the 3rd input connect the first power supply, output end is the output end (KeyCHK) of the signal deteching circuit；And
Resistance R3, wherein resistance R3 one end are connected with the output end of photo-coupler U1, other end ground connection.
In addition, as shown in figure 3, the signal deteching circuit 11 also include filter capacitor C1, wherein filter capacitor C1 with point
Piezoresistance R2 is in parallel.Filter capacitor C1 to input signal debounce, can be such that the signal of input photo-coupler U1 more stablizes.
With reference to Fig. 3, when electricity on the key signal, diode D1 is turned on and for the battery management system is powered, together
Through divider resistance R1 and R2 partial pressure, the partial pressure value on divider resistance R2 turns on photo-coupler U1 to Shi Suoshu key signals, due to
4th input of photo-coupler U1 connects the first power supply 5V, and after photo-coupler U1 conductings, the magnitude of voltage on resistance R3 is become by 0V
It is 5V, now the output end of the signal deteching circuit exports high level, then the battery management system judges key signal
Access；When the key signal power down, diode D1 ends and stops being powered for the battery management system, photo-coupler U1
Cut-off, the magnitude of voltage of resistance R3 is zero, the output end output low level of the signal deteching circuit.
In addition, as shown in figure 4, electric circuit 12 includes under the time delay：
First transistor switching circuit 41, wherein first transistor switching circuit 41 includes triode Q2, and it is described
The base stage of triode Q2 is the input of electric circuit under the time delay, grounded emitter；
The first input end connection second source of photo-coupler U2, wherein photo-coupler U2, the second input connects three poles
The colelctor electrode of pipe Q2, the 3rd input connects the 3rd power supply；
Second transistor switching circuit, wherein second transistor switching circuit includes triode Q1, and three pole
The output end of the base stage connection photo-coupler U2 of pipe Q1, grounded emitter；And
The input of relay RL1A, its repeat circuit RL1A connects the 3rd power supply, and the first output end connects three poles
The colelctor electrode of pipe Q1, the second output end connects the battery management system.
Wherein, the second source is 5V, and the 3rd power supply is 12V.
Additionally, as shown in figure 5, electric circuit 12 also includes under the time delay：
The positive pole of diode D2, wherein diode D2 connects the 3rd power supply, the input of negative pole connection relay RL1A
End；And first output end of the positive pole connection relay RL1A of diode D3, wherein diode D3, negative pole connection relay
RL1 inputs.
Wherein, diode D2 is anti-reverse diode, and diode D3 plays a part of to prevent surge.
Further, as shown in fig. 6, in electric circuit 12 under the time delay, first transistor switching circuit 41 is also
Including：
Divider resistance R7 and R8, wherein divider resistance R7 are connected between the base stage of triode Q2 and emitter stage, partial pressure electricity
Resistance R8 is series under the base stage of triode Q2 and the time delay between the input of electric circuit；Current-limiting resistance R6, wherein current limliting electricity
Resistance R6 is series between the colelctor electrode of triode Q2 and second input of photo-coupler U2；
Second transistor switching circuit 42 also includes：
Divider resistance R4 and R5, wherein divider resistance R4 are connected between the base stage of triode Q1 and emitter stage, partial pressure electricity
Resistance R5 is series between the output end of the base stage of triode Q1 and photo-coupler U2.
When the battery management system detects key signal by the signal deteching circuit to be input into, by the time delay
The input (LpcCtrl) of lower circuit is set to high level, now triode Q2 conductings, while photo-coupler U2 is turned on.It is vehicle-mounted
Lead-acid battery voltage 12V by after anti-reverse diode D2 and the U2 of conducting, driving triode Q1 conducting, with the conducting of Q1,
12V drives the coil of relay RL1A by diode D2, relay is turned on as the battery management system is powered.Now,
Electric circuit turn-on, can enter normal operating conditions under the time delay of BMS systems.
Exported when high level is changed into low level when the battery management system is detected by the signal deteching circuit,
Judge the key signal power down, then within the scheduled time battery management system by electric circuit under the time delay
Input (LpcCtrl) is still set to high level, the first transistor switching circuit conducting, photo-coupler U2 conductings, and described the
Second transistor switching circuit conducting described in two power drives, drives relay RL1A conductings, the output ends of relay RL1A the 3rd
The battery management system is continued as to power；At the end of the scheduled time, the battery management system is by under the time delay
The input of circuit is set to low level, the first transistor switching circuit cut-off, photo-coupler U2 cut-offs, the described 2nd 3
Pole pipe on-off circuit ends, relay RL1A cut-offs, stops being powered for the battery management system.
By above-mentioned control circuit, when the key signal power down, although it is described that the signal deteching circuit stops
Battery management system is powered, but the battery management system will be set to high level by the input of electric circuit under the time delay,
And in the Preset Time, lower electric preparation is done, necessary state control, parameter storage and information exchange are carried out, when
After completing indispensable lower electricity preparation, at the end of the Preset Time, the input of electric circuit under the time delay is set to low level,
So as to stop powering to the battery management system, the battery management system is entered resting state, reduce the cell tube
The power consumption of reason system, prevents vehicle-mounted lead-acid battery to be vented, and improves vehicle performance.
As shown in fig. 7, embodiments of the invention also provide a kind of battery management system, including：
The control circuit 71 of the battery management system described in above-mentioned Fig. 1-Fig. 6, and control device 72, for when the letter
When number detection electric circuit inspection is to key signal power down, the input of electric circuit under the time delay is set in the given time high electric
It is flat, and carry out at least one of following operation：Store state parameter, information exchange or the state control of the battery management system
System；It is additionally operable at the end of the scheduled time, the input of electric circuit under the time delay is set into low level.
By above-mentioned battery management system, the input state of key signal is detected using signal deteching circuit, when
When detecting key signal power down, in the given time for battery management system is powered, and at the end of the scheduled time, stop
Only for the battery management system is powered, BMS is solved when resting state is entered, it is impossible to the electric moment under being stored before lower electricity
State parameter, and carry out information exchange, also cannot other controllers of advance notice its power-down states problem, realize
Under electric vehicle during electricity, BMS can carry out lower electricity and prepare, and improve vehicle performance.
The embodiment of the present invention also provides a kind of electric vehicle, including the battery management system described in above-mentioned Fig. 7.
By above-mentioned electric vehicle, when the key signal power down, although it is described that the signal deteching circuit stops
Battery management system is powered, but the battery management system will be set to high level by the input of electric circuit under the time delay,
And in the Preset Time, lower electric preparation is done, necessary state control, parameter storage and information exchange are carried out, when
After completing indispensable lower electricity preparation, at the end of the Preset Time, the input of electric circuit under the time delay is set to low level,
So as to stop powering to the battery management system, the battery management system is entered resting state, reduce the cell tube
The power consumption of reason system, prevents vehicle-mounted lead-acid battery to be vented, and improves vehicle performance.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, but, the present invention is not limited to above-mentioned reality
The detail in mode is applied, in range of the technology design of the invention, various letters can be carried out to technical scheme
Monotropic type, these simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned specific embodiment, in not lance
In the case of shield, can be combined by any suitable means.In order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy is no longer separately illustrated.
Additionally, can also be combined between a variety of implementation methods of the invention, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (10)
1. the control circuit of a kind of battery management system, it is characterised in that the control circuit includes：
Signal deteching circuit, detects for the input state to key signal；And
Electric circuit under time delay, for being in the given time electricity when the signal deteching circuit detects key signal power down
Pond management system is powered, and at the end of the scheduled time, stops being powered for the battery management system.
2. control circuit according to claim 1, it is characterised in that the signal deteching circuit includes：
The positive pole input of diode D1, wherein diode D1 is key signal, and negative pole is connected with the battery management system；
Divider resistance R1 and R2, wherein one end of divider resistance R1 are connected with the positive pole of diode D1, and divider resistance R1's is another
Hold ground connection of being connected with divider resistance R2；
Photo-coupler U1, the wherein first input end of photo-coupler U1 and the second input are connected to the two of divider resistance R2
End, the 3rd input connects the first power supply, and output end is the output end of the signal deteching circuit；And
Resistance R3, wherein resistance R3 one end are connected with the output end of photo-coupler U1, other end ground connection.
3. control circuit according to claim 2, it is characterised in that the signal deteching circuit also includes filter capacitor
C1, wherein filter capacitor C1 are in parallel with divider resistance R2.
4. the control circuit according to Claims 2 or 3, it is characterised in that when electricity on the key signal, diode D1
Turn on and for the battery management system is powered, photo-coupler U1 conductings, the magnitude of voltage of resistance R3 is raised, the signal detection electricity
The output end output high level on road；When the key signal power down, it is the battery management system that diode D1 ends and stops
System power supply, photo-coupler U1 cut-offs, the magnitude of voltage of resistance R3 is zero, the output end output low level of the signal deteching circuit.
5. control circuit according to claim 1, it is characterised in that electric circuit includes under the time delay：
First transistor switching circuit, wherein first transistor switching circuit includes triode Q2, and the triode Q2
Base stage be electric circuit under the time delay input, grounded emitter；
The first input end connection second source of photo-coupler U2, wherein photo-coupler U2, the second input connecting triode Q2
Colelctor electrode, the 3rd input connect the 3rd power supply；
Second transistor switching circuit, wherein second transistor switching circuit includes triode Q1, and the triode Q1
Base stage connection photo-coupler U2 output end, grounded emitter；And
The input of relay RL1A, its repeat circuit RL1A connects the 3rd power supply, the first output end connecting triode Q1
Colelctor electrode, the second output end connects the battery management system.
6. control circuit according to claim 5, it is characterised in that electric circuit also includes under the time delay：
The positive pole of diode D2, wherein diode D2 connects the 3rd power supply, the input of negative pole connection relay RL1A；With
And
First output end of the positive pole connection relay RL1A of diode D3, wherein diode D3, RL1 is defeated for negative pole connection relay
Enter end.
7. control circuit according to claim 5, it is characterised in that
First transistor switching circuit also includes：
Divider resistance R7 and R8, wherein divider resistance R7 are connected between the base stage of triode Q2 and emitter stage, divider resistance R8
It is series under the base stage of triode Q2 and the time delay between the input of electric circuit；And
Current-limiting resistance R6, wherein current-limiting resistance R6 be series at triode Q2 colelctor electrode and photo-coupler U2 the second input it
Between；
Second transistor switching circuit also includes：
Divider resistance R4 and R5, wherein divider resistance R4 are connected between the base stage of triode Q1 and emitter stage, divider resistance R5
It is series between the output end of the base stage of triode Q1 and photo-coupler U2.
8. the control circuit according to any one in claim 5 to 7, it is characterised in that when the signal deteching circuit
When detecting key signal power down, the input of electric circuit is set to high level under the time delay in the scheduled time, described
First transistor switching circuit is turned on, and photo-coupler U2 conductings, the second source drives second transistor switching circuit
Conducting, drives relay RL1A conductings, and the output ends of relay RL1A the 3rd are powered for the battery management system；When described predetermined
At the end of time, the input of electric circuit is set to low level, the first transistor switching circuit cut-off, optocoupler under the time delay
Clutch U2 ends, the second transistor switching circuit cut-off, and relay RL1A cut-offs stop being supplied for the battery management system
Electricity.
9. a kind of battery management system, it is characterised in that the battery management system includes：
The control circuit of the battery management system described in claim any one of 1-8；And
Control device, for when the signal deteching circuit detects key signal power down, prolonging described in the given time
At present the input of electric circuit is set to high level, and carries out at least one of following operation：Store the battery management system
State parameter, information exchange or state control；It is additionally operable at the end of the scheduled time, by electric circuit under the time delay
Input is set to low level.
10. a kind of electric vehicle, it is characterised in that the electric vehicle includes the battery management system described in claim 9.
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| CN201611008173.3A CN106828136A (en) | 2016-11-16 | 2016-11-16 | The control circuit of battery management system, battery management system and electric vehicle |
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| CN201611008173.3A CN106828136A (en) | 2016-11-16 | 2016-11-16 | The control circuit of battery management system, battery management system and electric vehicle |
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| CN107143985A (en) * | 2017-06-26 | 2017-09-08 | 广东美的暖通设备有限公司 | A kind of device protected for air-conditioning system pressure and air-conditioning system |
| CN110289660A (en) * | 2019-07-23 | 2019-09-27 | 武汉洲际电讯科技股份有限公司 | Electric control circuit under a kind of communication power supply |
| CN113746059A (en) * | 2020-05-29 | 2021-12-03 | 比亚迪股份有限公司 | Vehicle power supply circuit, system and vehicle |
| CN114179676A (en) * | 2021-08-27 | 2022-03-15 | 淮海机电科技股份有限公司 | Power-off delay circuit based on BMS battery management system and application system |
| CN110289660B (en) * | 2019-07-23 | 2024-04-26 | 武汉洲际电讯科技股份有限公司 | Power-down control circuit of communication power supply |
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