CN107994631A - Emergency power-on circuit and method and automobile - Google Patents
Emergency power-on circuit and method and automobile Download PDFInfo
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- CN107994631A CN107994631A CN201711236635.1A CN201711236635A CN107994631A CN 107994631 A CN107994631 A CN 107994631A CN 201711236635 A CN201711236635 A CN 201711236635A CN 107994631 A CN107994631 A CN 107994631A
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- circuit
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- 230000005611 electricity Effects 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 7
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- 238000006243 chemical reaction Methods 0.000 description 2
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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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
-
- 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
-
- 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
- Y02T10/72—Electric energy management in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides an emergency power-on circuit, a method and an automobile, wherein the emergency power-on circuit comprises the following components: the emergency power supply comprises a power battery pack, a battery management system, a relay circuit, a first DC/DC converter, a second DC/DC converter and an emergency switch circuit; the first DC/DC converter, the second DC/DC converter and the battery management system are respectively connected to two poles of the power battery pack; the emergency switch circuit is connected with the first DC/DC converter; the output end of the first DC/DC converter is connected with the battery management system, and when the first DC/DC converter is started, the first DC/DC converter converts the output voltage of the power battery pack into a first low voltage to supply power for the battery management system and awaken the battery management system; the relay circuit is connected between the second DC/DC converter and the power battery pack in series, and the battery management system is connected with the relay circuit and the second DC/DC converter respectively. The invention can realize the power-on starting of the automobile under the condition that the storage battery is undervoltage or damaged, and improves the use reliability of the automobile.
Description
Technical field
The present invention relates to automobile technical field, particularly relates to a kind of emergent electrification circuit, method and automobile.
Background technology
With making constant progress for automotive engineering, car ownership is continuously increased, and nowadays automobile has become people
An indispensable part in daily life.It is existing, in electric automobile in use, due to the problems such as automobile discharge and recharge uses,
It may cause the storage battery of automobile that under-voltage deficient electricity or damage occurs；Storage battery is as one of important component on automobile, in automobile
Needed during startup storage battery give controller, relay etc. power supply so that automobile can normal electrifying startup, therefore, work as storage battery
During under-voltage or damage, automobile will be caused normally to start.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of emergent electrification circuit, method and automobile, to solve existing skill
In art storage battery under-voltage or damage in the case of automobile can not electrifying startup the problem of.
In a first aspect, the embodiment of the present invention provides a kind of emergent electrification circuit, including：
Power battery pack, battery management system, relay circuit, the first DC/DC converters, the 2nd DC/DC converters with
An and emergency button circuit；
First DC/DC converters, the 2nd DC/DC converters and the battery management system are connected to described
The two poles of the earth of power battery pack；
The emergency button circuit is connected with the first DC/DC converters, controls the first DC/DC converters to open
Or close；
The output terminal of the first DC/DC converters is connected with the battery management system, is changed in the first DC/DC
When device is opened, the output voltage of power battery pack is converted to the first low pressure by the first DC/DC converters, is the cell tube
Reason system power supply simultaneously wakes up the battery management system；
The relay circuit is serially connected between the 2nd DC/DC converters and the power battery pack, the battery
Management system is connected with the relay circuit and the 2nd DC/DC converters respectively, and the battery management system controls institute
Closure or the disconnection of relay circuit are stated, and, control the 2nd DC/DC converters to be turned on and off.
Wherein, the emergency button circuit includes emergency button, and described emergency button one end is changed with the first DC/DC
Device connects, other end ground connection；
When the emergency button closes, the first DC/DC converters are closed, when the emergency button disconnects, institute
State the unlatching of the first DC/DC converters.
Wherein, the relay circuit includes cathode relay and anode relay；
The cathode relay is connected between the cathode of the power battery pack and the 2nd DC/DC converters, institute
State anode relay to be connected between the anode connection of the power battery pack and the 2nd DC/DC converters, the cathode
Relay and the anode relay are connected with the battery management system respectively.
Wherein, the relay circuit further includes preliminary filling electrical circuit, and the preliminary filling electrical circuit is connected to the power battery
Between the cathode and the 2nd DC/DC converters of group, and it is connected with the battery management system.
Wherein, the preliminary filling electrical circuit includes preliminary filling relay and preliminary filling resistance, the preliminary filling relay and the preliminary filling
It is connected to after resistance series connection between the cathode of the power battery pack and the 2nd DC/DC converters, the preliminary filling relay
It is connected with the battery management system.
Wherein, the battery management system includes power circuit and control circuit；
The output terminal of the first DC/DC converters is connected with the power circuit and the control circuit respectively；
The control circuit respectively with the cathode relay, the anode relay, the preliminary filling electrical circuit and institute
The connection of the 2nd DC/DC converters is stated, the control circuit is used to control the cathode relay, the anode relay and described
The closure of preliminary filling electrical circuit or disconnection, and, control the 2nd DC/DC converters to be turned on and off.
Wherein, the output terminal of the first DC/DC converters passes through diode and the power circuit and the control respectively
Circuit connection processed.
Wherein, the control circuit is connected by CAN bus with the 2nd DC/DC converters.
Wherein, the emergent electrification circuit, further includes：Emergency starting indicator light, the emergency starting indicator light and the control
Circuit connection processed.
Wherein, the emergent electrification circuit, further includes：Storage battery, the storage battery connect with the 2nd DC/DC converters
Connect.
Second aspect, the embodiment of the present invention provide a kind of automobile, and the automobile includes above-mentioned emergent electrification circuit.
The third aspect, the embodiment of the present invention provides a kind of emergent powering method, applied in above-mentioned emergent electrification circuit
Battery management system, the described method includes：
Detect the emergent wake-up signal of the first DC/DC converters output；
When detecting the emergent wake-up signal, control relay circuit conducting, and, control the 2nd DC/DC conversions
Device is opened, and makes the 2nd DC/DC converters that the output voltage of power battery pack is converted to the second low pressure, is born for vehicle low pressure
Carry power supply.
Wherein, it is described when detecting the emergent wake-up signal, control relay circuit conducting, and, control second
The step of DC/DC converters are opened, including：
When detecting the emergent wake-up signal, the state-of-charge of power battery pack is detected；
When the state-of-charge is more than 0, control relay circuit conducting.
Wherein, it is described when the state-of-charge be more than 0 when, control relay circuit turn on the step of, including：
When the state-of-charge is more than 0, detection power battery pack, which currently whether there is, forbids the failure that high pressure powers on；
If power battery pack forbids the failure that high pressure powers on without presence, it is when determining electric under vehicle last time high pressure
The failure that high pressure powers on is forbidden in no presence；
If electricity forbids the failure that high pressure powers on without presence under vehicle last time high pressure, control relay circuit is led
It is logical.
Wherein, the step of control relay circuit conducting, including：
Control anode relay and the conducting of cathode relay.
Wherein, the step of control relay circuit conducting, further includes：
The anode relay and preliminary filling electrical circuit is controlled to turn on, and in the input voltage for determining the 2nd DC/DC converters
It is greater than or equal to preset value with the ratio of the total voltage of power battery pack, controls the cathode relay to turn on, control is described pre-
Charge circuit disconnects.
Wherein, control relay circuit conducting, and, after the step of the 2nd DC/DC converters of control are opened, institute
The method of stating further includes：
According to emergent power-up state, control emergency starting indicator light lights corresponding indicator light.
In the embodiment of the present invention, it is low that the output voltage of power battery pack is converted to first by the first DC/DC converters
Pressure, powers for battery management system and wakes up battery management system, battery management system controls the closure of the relay circuit
And the 2nd DC/DC converters of control are opened, and are realized that automobile powers on, can be realized vapour in the case of storage battery under-voltage or damage
Car electrifying startup, lifts vehicle operational reliability.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, needed in being described below to the embodiment of the present invention
Attached drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention,
For those of ordinary skill in the art, without having to pay creative labor, can also be obtained according to these attached drawings
Obtain other attached drawings.
Fig. 1 shows the structure diagram of emergent electrification circuit provided in an embodiment of the present invention；
Fig. 2 represents the circuit diagram of emergent electrification circuit provided in an embodiment of the present invention；
Fig. 3 represents the circuit diagram of battery management system in emergent electrification circuit provided in an embodiment of the present invention；
Fig. 4 represents the flow diagram of emergent powering method provided in an embodiment of the present invention.
[Main Reference Numerals explanation]
110- power battery packs, 120- battery management systems, 121- power circuits, 122- control circuits, 130- relays
Circuit, 131- cathode relays, 132- anode relays, 133- preliminary filling relays, 134- preliminary filling resistance, the first DC/DC of 140-
Converter, the 2nd DC/DC converters of 150-, 160- emergency button circuits, 161- emergency buttons, 170- storage batteries, 180- meet an urgent need
Start indicator lamp.
Embodiment
To make the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
Fig. 1 is referred to, it is illustrated that the structure diagram of emergent electrification circuit provided in an embodiment of the present invention.
The embodiment of the present invention provides a kind of emergent electrification circuit, and applied to automobile, which can include：It is dynamic
Power battery pack 110, battery management system 120, relay circuit 130, the first DC/DC converters 140, the 2nd DC/DC converters
150 and an emergency button circuit 160.Here, power battery pack 110, battery management system 120, relay circuit 130 and
One DC/DC converters 140 are arranged inside the power battery pack of automobile, the 2nd DC/DC converters 150 and emergency button circuit
160 are arranged at outside power battery pack.
First DC/DC converters 140, the 2nd DC/DC converters 150 and the battery management system 120 are distinguished
It is connected to the two poles of the earth of the power battery pack 110；The emergency button circuit 160 and the first DC/DC converters 140 connect
Connect, control the first DC/DC converters 140 to be turned on and off；The output terminal of the first DC/DC converters 140 and described
Battery management system 120 connects, and when the first DC/DC converters 140 are opened, the first DC/DC converters 140 will be dynamic
The output voltage of power battery pack 110 is converted to the first low pressure, powers for the battery management system 120 and wakes up the cell tube
Reason system 120.In the embodiment of the present invention, accumulator feeding or damage cause automobile can not normal electrifying startup when, by should
Anxious on-off circuit 160 controls the first DC/DC converters to open, and the output voltage of power battery pack 110 is changed through the first DC/DC
Device 140 is converted to the first low pressure, and powering as power supply for battery management system 120 and forming emergent wake-up signal wakes up cell tube
Reason system 120 works.
The relay circuit 130 is serially connected between the 2nd DC/DC converters 150 and the power battery pack 110,
The battery management system 120 is connected with the relay circuit 130 and the 2nd DC/DC converters 150 respectively, the electricity
Pond management system 120 controls closure or the disconnection of the relay circuit 130, and, control the 2nd DC/DC converters
150 are turned on and off.In the embodiment of the present invention, relay circuit 130 is the on-off circuit of the external High voltage output of power battery pack,
In battery management system 120 after the first low-voltage power supply and wake-up, battery management system 120 outputs control signals to relay electricity
Road, control relay circuit 130 close (conducting), close the high tension loop inside power battery pack, then battery management system
System 120 outputs control signals to the 2nd DC/DC converters 150, and the 2nd DC/DC converters 150 of control are opened, by power battery pack
110 output voltage is converted to the second low pressure, powers for vehicle low-voltage load, realizes automobile in storage battery under-voltage or the feelings of damage
Under condition can electrifying startup, also, the 2nd DC/DC converters 150 can send the status informations such as working status, input voltage to
Battery management system 120, in order to which battery management system 120 obtains and is controlled.In the embodiment of the present invention, first low pressure
Can be identical value with the second low pressure, or different values.In one example, it is contemplated that the use of vehicle low-voltage load
Need, the second low pressure being converted to through the 2nd DC/DC converters 150 can be arranged to 13.8V, and consider cell tube
The use of reason system 120 needs, and the first low pressure being converted to through the first DC/DC converters 140 can be arranged to 10V.
In the embodiment of the present invention, the output voltage of power battery pack 110 is converted to by the first DC/DC converters 140
First low pressure, powers for battery management system 120 and wakes up battery management system 120, battery management system 120 control it is described after
The closure and the 2nd DC/DC converters 150 of control of appliance circuit 130 are opened, and realize that automobile powers on, can be in storage battery under-voltage
Or automobile electrifying startup is realized in the case of damage, lift vehicle operational reliability.
Wherein, in the embodiment of the present invention, for ensure automobile can electrifying startup, in the first DC/DC converters 140 output the
After one low pressure powers for battery management system 120 and wakes up battery management system 120, relay is controlled in battery management system 120
Before device circuit 130 closes, the state-of-charge (State of Charge, SOC) of detection power battery pack 110 is can be also used for,
And when definite state-of-charge is more than 0, control relay circuit 130 closes.In such manner, it is possible to ensure the lotus of power battery pack 110
Electricity condition meets electricity demanding on automobile.
Further, when battery management system 120 detects that definite state-of-charge is more than 0, it is dynamic to can be also used for detection
Power battery pack 110 is detecting that power battery pack 110 there is currently no taboo currently with the presence or absence of forbidding the failure that high pressure powers on
During the failure that only high pressure powers on, and obtain EEPROM (Electrically Erasable Programmable read only
Memory, Electrically Erasable Programmable Read-Only Memory) in storage fault message, when determining under vehicle last time high pressure electric whether
It is electric without in the presence of the failure for forbidding high pressure to power in the presence of the failure for forbidding high pressure to power on, and in the case where determining vehicle last time high pressure
When, control relay circuit 130 closes.
Wherein, Fig. 2 is referred to, in a preferred embodiment of the invention, the emergency button circuit 160 can include emergent open
161 are closed, described 161 one end of emergency button is connected with the first DC/DC converters 140, other end ground connection；Opened in described meet an urgent need
When closing 161 closure, the first DC/DC converters 140 are closed, when the emergency button 161 disconnects, the first DC/DC
Converter 140 is opened.In the embodiment of the present invention, which can be normally closed switch, and one end passes through rigid line and first
Switch interface (the ON/OFF interfaces as shown in Figure 2) connection of DC/DC converters 140, and the other end is grounded；In emergency button
During 161 closure, the switch interface ground connection of the first DC/DC converters 140, the first DC/DC converters 140 are closed；In emergency button
During 161 disconnection, the switch interface input of the first DC/DC converters 140 is hanging, and the first DC/DC converters 140 are opened.
Wherein, Fig. 2 is referred to, in the embodiment of the present invention, the relay circuit 130 includes cathode relay 131 and negative
Pole relay 132；Cathode relay 131, anode relay 132 are the master switch of the external High voltage output of power battery pack.
The cathode relay 131 is connected to the cathode of the power battery pack 110 and the 2nd DC/DC converters
Between 150, the anode relay 132 is connected to the anode connection and the 2nd DC/DC conversions of the power battery pack 110
Between device 150, the cathode relay 131 and the anode relay 132 are connected with the battery management system 120 respectively.
Here, which is connected with cathode relay 131 and anode relay 132 respectively, for controlling cathode relay
The closure or disconnection of device 131 and anode relay 132.In the embodiment of the present invention, cathode relay is controlled by battery management system
Device 131 and anode relay 132 close, and close the high tension loop inside power battery pack.
Wherein, refer to Fig. 2, in the embodiment of the present invention, impact, institute are produced to high voltage component when being powered in order to avoid high pressure
Preliminary filling electrical circuit can also be included by stating relay circuit 130, and the preliminary filling electrical circuit is being connected to the power battery pack 110 just
Between pole and the 2nd DC/DC converters 150, and it is connected with the battery management system 120.Here, the preliminary filling electrical circuit
It is arranged inside power battery pack, the preliminary filling electrical circuit is in parallel with cathode relay 131；Battery management system 120 and the preliminary filling
Electrical circuit connects, for controlling preliminary filling electrical circuit to be turned on or off.Cathode relay 131 is controlled to lead in battery management system 120
Before logical, battery management system 120 controls the conducting of preliminary filling electrical circuit, straight to avoid cathode relay 131 and anode relay 132
Connect electricity, immediate current excessive the problem of causing device failure, and determine the input voltages of the 2nd DC/DC converters 150 with
The ratio of the total voltage of power battery pack 110 is greater than or equal to preset value, and control cathode relay 131 turns on, control precharge
Circuit disconnects.Here, battery management system is additionally operable to the total voltage of detection power battery pack 110, and obtains the 2nd DC/DC and turn
The input voltage of parallel operation 150.In one example, which can be 95%.
Specifically, the preliminary filling electrical circuit includes preliminary filling relay 133 and preliminary filling resistance 134, the preliminary filling relay 133
The cathode of the power battery pack 110 and the 2nd DC/DC converters 150 are connected to after connecting with the preliminary filling resistance 134
Between, the preliminary filling relay 133 is connected with the battery management system 120.Here, battery management system 120 controls preliminary filling
Relay 133 is turned on or off.
Fig. 3 is referred to, it is illustrated that the electricity of battery management system in emergent electrification circuit provided in an embodiment of the present invention
Road schematic diagram.In the embodiment of the present invention, the battery management system 120 can include power circuit 121 and control circuit 122；
The output terminal of the first DC/DC converters 140 is connected with the power circuit 121 and the control circuit 122 respectively；It is described
Control circuit 122 respectively with the cathode relay, the anode relay, the preliminary filling electrical circuit and the 2nd DC/
DC converters 150 connect, and the control circuit 122 is used to control the cathode relay 131,132 and of anode relay
The closure of the preliminary filling electrical circuit or disconnection, and, control the 2nd DC/DC converters 150 to be turned on and off.It is of the invention real
Apply in example, be connected by the output terminal of the first DC/DC converters 140 with power circuit 121, will be through the first DC/DC converters 140
The first low pressure being converted to is inputted to power circuit 121 and is powered for battery management system 120；Turned by the first DC/DC
The output terminal of parallel operation 140 is connected with control circuit 122, the first low pressure is inputted to control circuit 122 to wake up battery management system
System 120.
Wherein, in the embodiment of the present invention, the output terminal of the first DC/DC converters 140 passes through diode D2, D3 respectively
It is connected with the power circuit 121 and the control circuit 122；In such manner, it is possible to ensure the unidirectional output of the first low pressure.
During normal use, if storage battery 170 is not fed, to power circuit power supply (BMS as shown in Figure 3
Often electricity), specifically, storage battery 170 is connected by diode D1 with power circuit 121；In the embodiment of the present invention, pass through diode
D2 is able to ensure that emergency power supply (the first low pressure) unidirectionally inputs the power circuit 121 of battery management system 120, often electric from BMS
Influence.
Wherein, the control circuit 122 is total by CAN (Controller Area Network, controller local area network)
Line is connected with the 2nd DC/DC converters 150.Control circuit 122 receives the 2nd DC/DC converters 150 by CAN bus and sends out
The status informations such as the working status sent, input voltage, and give the 2nd DC/DC converters by CAN bus output control information
150, the 2nd DC/DC converters 150 of control are turned on and off.
Wherein, in the embodiment of the present invention, car emergency power-up state is understood for ease of user, which may be used also
With including：Emergency starting indicator light 180, the emergency starting indicator light 180 are connected with the control circuit 122.Wherein, meet an urgent need
Start indicator lamp 180 includes：First indicator light and the second indicator light, control cathode relay 131 to close in control circuit 122,
Control circuit 122 controls corresponding indicator light to light according to emergent power-up state；If emergent power on success, control circuit 122 is controlled
Make the first indicator light to light, if emergent power on failure, control circuit 122 controls the second indicator light to light.Wherein, in an example
In, the first indicator light can be green indicator light, and the second indicator light can be red indicating light.
Wherein, Fig. 2 and Fig. 3 are referred to, in the embodiment of the present invention, which further includes：Storage battery 170, institute
Storage battery 170 is stated to be connected with the 2nd DC/DC converters 150.Here, the 2nd DC/DC converters 150 and storage battery are passed through
170 connections, in order to which after the startup of the 2nd DC/DC converters 150, the second low pressure being converted to is supplied for vehicle low-voltage load
While electric, it can be that storage battery 170 charges, it is under-voltage to solve the problems, such as that storage battery 170 is fed.Wherein, in the embodiment of the present invention, by
During normal use, storage battery 170 can be that battery management system 120 is powered (BMS as shown in Figure 3 is often electric), work as vapour
When car is by emergent electrification circuit electrifying startup, the 2nd DC/DC converters 150 can be that storage battery 170 charges, then battery management
System 120 will receive the first low pressure at the same time and charging voltage that storage battery 170 exports (i.e. battery management system 120 at this time
The charging voltage that receiving voltage includes the first low pressure and storage battery 170 exports), therefore, battery management system 120 can pass through inspection
The receiving voltage of battery management system 120 is surveyed, and when receiving voltage is greater than or equal to preset voltage value, determines emergent power on into
Work(.In one example, storage battery 170 is 12V storage batteries, which is 10V, and emergent electrification circuit includes emergency starting
Indicator light 180, emergency starting indicator light 180 include the first indicator light and the second indicator light, and battery management system 120 is used to connect
When receipts voltage is greater than or equal to preset voltage value, determining to meet an urgent need powers on success, and the first indicator light of control is lighted, in the given time
When determining that receiving voltage is less than preset voltage value, determining to meet an urgent need powers on failure, and the second indicator light of control is lighted；In the example, in advance
If magnitude of voltage can be 12V.
Fig. 4 is referred to, it is illustrated that the flow diagram of emergent powering method provided in an embodiment of the present invention.The present invention
Embodiment also provides a kind of emergent powering method, applied to the battery management system in above-mentioned emergent electrification circuit, the method
It can include：
Step 401, the emergent wake-up signal of the first DC/DC converters output is detected.
In this step, when by controlling emergency button circuit, the first DC/DC converters of control are opened, and turn the first DC/DC
The output voltage of power battery pack is converted into the first low pressure by parallel operation, is powered for battery management system, meanwhile, the first low pressure shape
Exported into emergent wake-up signal to battery management system, at this time, battery management system is initialized after power supply is received, and
Detect the emergent wake-up signal.
Step 402, when detecting the emergent wake-up signal, control relay circuit conducting, and, control second
DC/DC converters are opened, and are made the 2nd DC/DC converters that the output voltage of power battery pack is converted to the second low pressure, are
Vehicle low-voltage load is powered.
In this step, battery management system outputs control signals to relay circuit after emergent wake-up signal is detected,
Control relay circuit closure conducting, closes the high tension loop inside power battery pack；Battery management system output control is believed
Number to the 2nd DC/DC converters, the 2nd DC/DC converters of control are opened, and the output voltage of power battery pack is converted to second
Low pressure, powers for vehicle low-voltage load, realizes that automobile being capable of electrifying startup in the case of storage battery under-voltage or damage.Wherein,
It is step 402, described when detecting the emergent wake-up signal in the embodiment of the present invention, control relay circuit conducting, with
And the step of control the 2nd DC/DC converters unlatching, it can include：When detecting the emergent wake-up signal, power is detected
The state-of-charge of battery pack；When the state-of-charge is more than 0, control relay circuit conducting.
Further, it is described when the state-of-charge be more than 0 when, control relay circuit turn on the step of, can include：
When the state-of-charge is more than 0, detection power battery pack, which currently whether there is, forbids the failure that high pressure powers on；If power battery
Whether there is when group forbids the failure that high pressure powers on without presence, when determining electric under vehicle last time high pressure forbids high pressure to power on
Failure；If electricity forbids the failure that high pressure powers on without presence under vehicle last time high pressure, control relay circuit conducting.
Wherein, in the embodiment of the present invention, relay circuit includes cathode relay and anode relay, specifically, step
In 402, the step of control relay circuit conducting, it can include：Control anode relay and the conducting of cathode relay.
Wherein, in the embodiment of the present invention, impact is produced to high voltage component when being powered in order to avoid high pressure, relay circuit is also
Including preliminary filling electrical circuit, in step 402, the step of the control relay circuit conducting, can also include：Control the anode
Relay and the conducting of preliminary filling electrical circuit, and in the input voltage and the total voltage of power battery pack for determining the 2nd DC/DC converters
Ratio be greater than or equal to preset value, control the cathode relay to turn on, control the preliminary filling electrical circuit to disconnect.It is of the invention real
Apply in example, by detecting the total voltage of power battery pack, and obtain the input voltage of the 2nd DC/DC converters, then calculate
The ratio of the input voltage of 2nd DC/DC converters and the total voltage of power battery pack, and in the input of the 2nd DC/DC converters
The ratio of the total voltage of voltage and power battery pack is greater than or equal to preset value, i.e., when preliminary filling is completed, control cathode relay is led
Logical, control preliminary filling electrical circuit disconnects.In one example, which can be 95%.
Wherein, in the embodiment of the present invention, step 402, the control relay circuit conducting, and, control the 2nd DC/DC
After the step of converter is opened, the method can also include：According to emergent power-up state, emergency starting indicator light point is controlled
Bright corresponding indicator light.In the embodiment of the present invention, emergency starting indicator light can include：First indicator light and the second indicator light；
If emergent power on success, battery management system and the first indicator light of control are lighted, if emergent power on failure, battery management system control
The second indicator light is made to light.Wherein, in one example, the first indicator light can be green indicator light, and the second indicator light can be
Red indicating light.Further, meet an urgent need in electrification circuit, storage battery is connected with the 2nd DC/DC converters, when automobile passes through
During emergent electrification circuit electrifying startup, the 2nd DC/DC converters can be that storage battery charges, then battery management system will connect at the same time
Receive the first low pressure and the charging voltage of storage battery output.Therefore, battery management system can be by detecting battery management system
Receiving voltage, and when receiving voltage is greater than or equal to preset voltage value, determine it is emergent power on success, control the first indicator light
Light；When determining that receiving voltage is less than preset voltage value in the given time, determining to meet an urgent need powers on failure, controls the second indicator light
Light.
In provided in an embodiment of the present invention, the output voltage of power battery pack is converted to by the first DC/DC converters
First low pressure, powers for battery management system and wakes up battery management system, battery management system controls the relay circuit
Closure and control the 2nd DC/DC converters open, realize that automobile powers on, can be in the case of storage battery under-voltage or damage
Realize automobile electrifying startup, lift vehicle operational reliability.
In the following, the present invention is described in more detail by the example of a more specifically emergent powering method again.
In this example, the specific steps of the powering method of meeting an urgent need are described in detail：
Step 1, user starts emergency starting switch.After user starts emergency starting switch, emergency button circuit is answered
Suddenly switch off, the first DC/DC converters are opened, and the output voltage of power battery pack is converted to the first low pressure of 10V, are
Battery management system is powered；After battery management system receives the first low-voltage power supply, initialized.
Step 2, detect whether to receive emergent wake-up signal.Here, battery management system is after the completion of initialization, detection
Whether the emergent wake-up signal of first depression formation pair of first DC/DC converter output is received, if receiving emergent wake-up
Signal, performs step 3；Otherwise, step 16 is performed.
Step 3, judge to detect that the SOC of power battery pack is more than 0, and without in the presence of the failure for forbidding high pressure to power on.If
Judging result is yes, then performs step 4, otherwise, performs step 16.
Step 4, there is no the presence of the failure for forbidding high pressure to power on when judging electric under vehicle last time high pressure.Here, if sentencing
Disconnected result is yes, then performs step 5, otherwise performs step 16.
Step 5, anode, preliminary filling relay closure are controlled, and starts T0, T1 timing.Here, by controlling anode relay
Closed with preliminary filling relay and carry out preliminary filling.
Step 6, judge whether to receive the status information of the 2nd DC/DC converters.Here, battery management system passes through
CAN bus receives the status informations such as the working status of the 2nd DC/DC converters, input voltage.If receiving the status information,
Step 8 is performed, otherwise, performs step 7.
Step 7, the calibration value of T0 >=first is judged.Here, if not receiving the state of the 2nd DC/DC converters in step 6
Information, judges whether T0 is greater than or equal to the first calibration value, if T0 is greater than or equal to the first calibration value, performs step 16, no
Then, return and perform step 6.Wherein, the first calibration value can be 800ms.
Step 8, judge whether the 2nd DC/DC converters are in holding state.Here, the state received according to step 6
Information, determines whether the 2nd DC/DC converters are in holding state, if so, then performing step 9, otherwise, performs step 16.
Step 9, total voltage >=95% of input voltage/power battery pack of the 2nd DC/DC converters is judged.If second
Total voltage >=95% of input voltage/power battery pack of DC/DC converters, then it represents that preliminary filling is completed, and performs step 11, no
Then, step 10 is performed.
Step 10, the calibration value of T1 >=second is judged.Here, if the calibration value of T1 >=second, step 15 is performed, otherwise, is returned
Receipt row step 9.Wherein, the second calibration value can be 1s.
Step 11, cathode relay closure is controlled, control preliminary filling relay disconnects；The 2nd DC/DC converters are controlled to enable,
And start T2 timing.
Step 12, receiving voltage >=12V of battery management system is judged.Here, closed in cathode relay, and second
After DC/DC converters enable, the output voltage of power battery pack is converted to the second low pressure by the 2nd DC/DC converters, is whole
Car low-voltage load is powered, while is charged for storage battery, and at this time, the receiving voltage of battery management system includes the first low pressure and electric power storage
The charging voltage of pond output.If receiving voltage >=12V, then it represents that it is emergent to power on success, step 19 is performed, otherwise, performs step
13。
Step 13, the calibration value of T2 >=the 3rd is judged.Here, if the calibration value of T2 >=the 3rd, step 14 is performed, otherwise, is returned
Receipt row step 12.Wherein, the 3rd calibration value can be 50ms.
Step 14, the 2nd DC/DC converters are controlled to close.Here, failure, battery management system control are powered on due to emergent
2nd DC/DC converters are closed, and continue to execute step 15.
Step 15, anode relay, cathode relay is controlled to disconnect.Here, battery management system controls the 2nd DC/DC to turn
Parallel operation is closed, and continues to execute step 16.
Step 16, the second indicator light of control is lighted, and starts T3 timing.Here, battery management system control, which should meet an urgent need, opens
Second indicator light of dynamic indicator light is lighted, and powers on failure to prompt user to meet an urgent need, and continue to execute step 17.
Step 17, the calibration value of T3 >=the 4th is determined.Here, if the calibration value of T3 >=the 4th, step 18 is performed, wherein, the
Four calibration values can be 3min.
Step 18, battery management system dormancy is controlled.
Step 19, the first indicator light of control is lighted.Here, the first of battery management system control emergency starting indicator light refers to
Show that lamp is lighted, power on success to prompt user to meet an urgent need, and continue to execute step 20.
Step 20, automobile ON keeps off the controller that power supply is powered and powers on, and completes initialization and self-test.Here, user passes through
Key start automobile, and make key switch be placed in ON gear when, ON gear power supply power supply controller power on, make automobile starting；Meanwhile
Battery management system control electric machine controller wakes up, and enabled air-conditioner controller relay, so that electric machine controller, airconditioning control
Device initializes and self-test.After the completion of step 20 execution, step 21 is continued to execute.
Step 21, judge whether to need the failure of lower high pressure.If in the presence of the failure for needing lower high pressure, step is performed
16, otherwise, perform step 22.
Step 22, prompt message is sent to instrument.Here, battery management system, which sends to meet an urgent need, powers on successful prompt message
To instrument, so that instrument, which shows to meet an urgent need, powers on successful information, and closing information " emergency starting switch please be close " is prompted.
For foregoing embodiment of the method, in order to be briefly described, therefore it is all expressed as to a series of combination of actions, still
Those skilled in the art should know, the present invention and from the limitation of described sequence of movement, because according to the present invention, it is some
Step can use other orders or be carried out at the same time.Secondly, those skilled in the art should also know, described in the specification
Embodiment belong to preferred embodiment, involved action is not necessarily essential to the invention.
It should be noted that in inventive embodiments, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or order.
The unit illustrated as separating component may or may not be physically separate, be shown as unit
The component shown may or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
In network unit.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs
's.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can also
That unit is individually physically present, can also two or more units integrate in a unit.
If the function is realized in the form of SFU software functional unit and is used as independent production marketing or in use, can be with
It is stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially in other words
The part to contribute to the prior art or the part of the technical solution can be embodied in the form of software product, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be
People's computer, server, or network equipment etc.) perform all or part of step of each embodiment the method for the present invention.
And foregoing storage medium includes：USB flash disk, mobile hard disk, ROM, RAM, magnetic disc or CD etc. are various can be with store program codes
Medium.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, some improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (17)
- A kind of 1. emergent electrification circuit, it is characterised in that including：Power battery pack, battery management system, relay circuit, the first DC/DC converters, the 2nd DC/DC converters and one Emergency button circuit；First DC/DC converters, the 2nd DC/DC converters and the battery management system are connected to the power The two poles of the earth of battery pack；The emergency button circuit is connected with the first DC/DC converters, controls the first DC/DC converters to open or close Close；The output terminal of the first DC/DC converters is connected with the battery management system, is opened in the first DC/DC converters The output voltage of power battery pack is converted to the first low pressure by Qi Shi, the first DC/DC converters, is the battery management system System power supply simultaneously wakes up the battery management system；The relay circuit is serially connected between the 2nd DC/DC converters and the power battery pack, the battery management System is connected with the relay circuit and the 2nd DC/DC converters respectively, and the battery management system is used to control institute Closure or the disconnection of relay circuit are stated, and, control the 2nd DC/DC converters to be turned on and off.
- 2. emergent electrification circuit according to claim 1, it is characterised in that the emergency button circuit includes emergent open Close, described emergency button one end is connected with the first DC/DC converters, other end ground connection；When the emergency button closes, the first DC/DC converters are closed, when the emergency button disconnects, described the One DC/DC converters are opened.
- 3. emergent electrification circuit according to claim 1, it is characterised in that the relay circuit includes cathode relay With anode relay；The cathode relay is connected between the cathode of the power battery pack and the 2nd DC/DC converters, described negative Pole relay is connected between the anode connection of the power battery pack and the 2nd DC/DC converters, the cathode relay Device and the anode relay are connected with the battery management system respectively.
- 4. emergent electrification circuit according to claim 3, it is characterised in that the relay circuit, which further includes, to be pre-charged back Road, the preliminary filling electrical circuit are connected between the cathode of the power battery pack and the 2nd DC/DC converters, and with it is described Battery management system connects.
- 5. emergent electrification circuit according to claim 4, it is characterised in that the preliminary filling electrical circuit includes preliminary filling relay With preliminary filling resistance, the cathode of the power battery pack and described is connected to after the preliminary filling relay and preliminary filling resistance series connection Between 2nd DC/DC converters, the preliminary filling relay is connected with the battery management system.
- 6. emergent electrification circuit according to claim 4, it is characterised in that the battery management system includes power circuit And control circuit；The output terminal of the first DC/DC converters is connected with the power circuit and the control circuit respectively；The control circuit respectively with the cathode relay, the anode relay, the preliminary filling electrical circuit and described Two DC/DC converters connect, and the control circuit is used to control the cathode relay, the anode relay and the preliminary filling The closure of electrical circuit or disconnection, and, control the 2nd DC/DC converters to be turned on and off.
- 7. emergent electrification circuit according to claim 6, it is characterised in that the output terminal of the first DC/DC converters It is connected respectively by diode with the power circuit and the control circuit.
- 8. emergent electrification circuit according to claim 6, it is characterised in that the control circuit passes through CAN bus and institute State the connection of the 2nd DC/DC converters.
- 9. emergent electrification circuit according to claim 6, it is characterised in that further include：Emergency starting indicator light, it is described to answer Anxious start indicator lamp is connected with the control circuit.
- 10. emergent electrification circuit according to claim 1, it is characterised in that further include：Storage battery, the storage battery with The 2nd DC/DC converters connection.
- 11. a kind of automobile, it is characterised in that the automobile includes powering on electricity as claims 1 to 10 any one of them is met an urgent need Road.
- 12. a kind of emergent powering method, the battery in electrification circuit of meeting an urgent need applied to such as claims 1 to 10 any one of them Management system, it is characterised in that the described method includes：Detect the emergent wake-up signal of the first DC/DC converters output；When detecting the emergent wake-up signal, control relay circuit conducting, and, the 2nd DC/DC converters of control are opened Open, make the 2nd DC/DC converters that the output voltage of power battery pack is converted to the second low pressure, supplied for vehicle low-voltage load Electricity.
- 13. according to the method for claim 12, it is characterised in that described when detecting the emergent wake-up signal, control Relay circuit processed conducting, and, the step of the 2nd DC/DC converters of control are opened, including：When detecting the emergent wake-up signal, the state-of-charge of power battery pack is detected；When the state-of-charge is more than 0, control relay circuit conducting.
- 14. according to the method for claim 13, it is characterised in that it is described when the state-of-charge is more than 0, control relay The step of device circuit turn-on, including：When the state-of-charge is more than 0, detection power battery pack, which currently whether there is, forbids the failure that high pressure powers on；If power battery pack forbids the failure that high pressure powers on without presence, whether deposited when determining electric under vehicle last time high pressure In the failure for forbidding high pressure to power on；If electricity forbids the failure that high pressure powers on without presence under vehicle last time high pressure, control relay circuit conducting.
- 15. according to the method for claim 12, it is characterised in that the step of control relay circuit turns on, including：Control anode relay and the conducting of cathode relay.
- 16. according to the method for claim 15, it is characterised in that the step of control relay circuit turns on, also wraps Include：Control the anode relay and preliminary filling electrical circuit to turn on, and determine the input voltage of the 2nd DC/DC converters with moving The ratio of the total voltage of power battery pack is greater than or equal to preset value, controls the cathode relay to turn on, controls the precharge Circuit disconnects.
- 17. according to the method for claim 12, it is characterised in that control relay circuit conducting, and, control the After the step of two DC/DC converters are opened, the method further includes：According to emergent power-up state, control emergency starting indicator light lights corresponding indicator light.
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| CN201711236635.1A CN107994631A (en) | 2017-11-30 | 2017-11-30 | Emergency power-on circuit and method and automobile |
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| CN201711236635.1A CN107994631A (en) | 2017-11-30 | 2017-11-30 | Emergency power-on circuit and method and automobile |
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| CN109808547A (en) * | 2019-04-04 | 2019-05-28 | 安徽卓越电气有限公司 | A kind of low-power consumption power accumulator igniting electrifying control circuit and control method |
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| CN113697015A (en) * | 2021-08-27 | 2021-11-26 | 江苏爱玛车业科技有限公司 | Starting system and method of electric vehicle |
| CN113922453A (en) * | 2021-10-14 | 2022-01-11 | 徐工消防安全装备有限公司 | Lithium battery system for aerial work platform and implementation method |
| CN114103842A (en) * | 2021-12-08 | 2022-03-01 | 安徽江淮汽车集团股份有限公司 | Standby starting circuit of new energy automobile |
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