CN110395125A - Self checking method and device, the onboard charger and electric vehicle of onboard charger - Google Patents
Self checking method and device, the onboard charger and electric vehicle of onboard charger Download PDFInfo
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- CN110395125A CN110395125A CN201810359174.5A CN201810359174A CN110395125A CN 110395125 A CN110395125 A CN 110395125A CN 201810359174 A CN201810359174 A CN 201810359174A CN 110395125 A CN110395125 A CN 110395125A
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000005070 sampling Methods 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 8
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- 230000001965 increasing effect Effects 0.000 abstract description 10
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- 239000004065 semiconductor Substances 0.000 description 6
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- 238000005516 engineering process Methods 0.000 description 3
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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
- B60L3/003—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to inverters
-
- 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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
-
- 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
-
- 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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of self checking methods of onboard charger and device, onboard charger and electric vehicle, onboard charger includes single-phase H-bridge circuit and charging control switch, the AC power source of input is converted to DC power supply by single-phase H-bridge circuit under the control of charging control switch by onboard charger, think power battery charging, self checking method is the following steps are included: before charging control switch closure, by controlling single-phase H-bridge circuit, using the DC inverter for providing battery as alternating current；Alternating current is sampled to obtain sampled voltage；Judge whether sampled voltage is consistent with target voltage；If sampled voltage is consistent with target voltage, then judge that onboard charger is in normal condition, so as to be detected under conditions of not increasing component to circuit, prevent power grid and battery from straight-through or short circuit situation occur, it avoids charge circuit from high current occur, eliminates the hidden danger of damage onboard charger, charging pile and automobile batteries etc..
Description
Technical field
The present invention relates to technical field of vehicle, in particular to a kind of self checking method of onboard charger, a kind of vehicle-mounted charge
The self-checking unit of device, a kind of onboard charger and a kind of electric vehicle.
Background technique
It is commercialized progress along with electric car, vehicle-mounted charging system for electric vehicle has become electric car important spare part
One of, vehicle onboard system charging method also compares more.But the relevant technologies the problem is that, insert that be attracted switch after rifle straight
It gets access to grid in succession and metal-oxide-semiconductor, and drives metal-oxide-semiconductor switch starting charging, at this point, being likely to occur power grid if metal-oxide-semiconductor has damaged
The straight-through or short-circuit phenomenon with two power supplys of battery, and then cause charge circuit high current occur, while vehicle-mounted there is also damaging
The hidden danger such as charger, charging pile and automobile batteries.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, of the invention
First purpose be to propose a kind of self checking method of onboard charger, be able to detect single-phase H-bridge circuit whether failure.
Second object of the present invention is to propose a kind of non-transitorycomputer readable storage medium.
Third object of the present invention is to propose a kind of self-checking unit of onboard charger.
Fourth object of the present invention is to propose a kind of onboard charger.
5th purpose of the invention is to propose a kind of electric vehicle.
In order to achieve the above objectives, the self checking method for the onboard charger that first aspect present invention embodiment proposes, the vehicle
Carrying charger includes single-phase H-bridge circuit and charging control switch, control of the onboard charger in the charging control switch
The AC power source of input is converted to by DC power supply by the single-phase H-bridge circuit down, with for power battery charging, the self-test
Method the following steps are included: the charging control switch closure before, by controlling the single-phase H-bridge circuit, with
The DC inverter that the battery is provided is alternating current；The alternating current is sampled to obtain sampled voltage；Judge institute
State whether sampled voltage is consistent with target voltage；If the sampled voltage is consistent with target voltage, institute is judged
It states onboard charger and is in normal condition.
The self checking method of the onboard charger proposed according to embodiments of the present invention leads to before charging control switch closure
It crosses single-phase H-bridge circuit to be controlled, using the DC inverter for providing battery as alternating current, alternating current is sampled to obtain
Sampled voltage, judges whether sampled voltage is consistent with target voltage, if sampled voltage is consistent with target voltage,
Judge that onboard charger is in normal condition.The self checking method of the embodiment of the present invention can pass through judgement electricity before charging as a result,
Pond provide inverter voltage whether be consistent with target voltage detect single-phase H-bridge circuit whether failure, so as to not
Circuit is detected under conditions of increase component, prevents power grid and battery from straight-through or short circuit situation occur, avoids charging
There is high current in circuit, eliminates the hidden danger of damage onboard charger, charging pile and automobile batteries etc..
According to one embodiment of present invention, when the sampled voltage and target voltage are not consistent, described in judgement
Onboard charger breaks down.
According to one embodiment of present invention, the single-phase H-bridge circuit is controlled using unipolar control mode,
So that the single-phase H-bridge circuit carries out inversion work.
According to one embodiment of present invention, the target voltage is less than 300V.
In order to achieve the above objectives, a kind of non-transitory computer-readable storage medium that second aspect of the present invention embodiment proposes
Matter is stored thereon with computer program, and the self checking method of the onboard charger is realized when which is executed by processor.
The non-provisional computer-readable recording mediums proposed according to embodiments of the present invention, can be in the item for not increasing component
Circuit is detected under part, prevents power grid and battery from straight-through or short circuit situation occur, charge circuit is avoided high current occur,
Eliminate the hidden danger of damage onboard charger, charging pile and automobile batteries etc..
In order to achieve the above objectives, a kind of self-checking unit for onboard charger that third aspect present invention embodiment proposes, institute
Stating onboard charger includes single-phase H-bridge circuit and charging control switch, and the onboard charger is in the charging control switch
Control is lower to be converted to DC power supply for the AC power source of input by the single-phase H-bridge circuit, described with for power battery charging
Self-checking unit includes: control module, for the charging control switch closure before, by the single-phase H-bridge circuit into
Row control, using the DC inverter for providing the battery as alternating current；Sampling module, for being sampled to the alternating current
To obtain sampled voltage；Judgment module is detected, for judging whether the sampled voltage is consistent with target voltage, and in institute
It states sampled voltage and when target voltage is consistent, judges that the onboard charger is in normal condition.
The self-checking unit of the onboard charger proposed according to embodiments of the present invention, by control module in charging control switch
Before closure, by controlling single-phase H-bridge circuit, by direct current that battery provides, you become alternating current, sampling module
Alternating current is sampled to obtain sampled voltage, detection judgment module judge sampled voltage whether with target voltage holding one
It causes, and when sampled voltage and target voltage are consistent, judges that onboard charger is in normal condition.The present invention is real as a result,
Apply example self-checking unit can before charging, by judge battery provide inverter voltage whether with target voltage be consistent come
Detecting single-phase H-bridge circuit, whether failure so as to detect under conditions of not increasing component to circuit prevents power grid
There is straight-through or short circuit situation with battery, charge circuit avoided high current occur, eliminate damage onboard charger, charging pile and
The hidden danger of automobile batteries etc..
According to one embodiment of present invention, the detection judgment module is also used to, in the sampled voltage and target electricity
When pressure is not consistent, judge that the onboard charger breaks down.
According to one embodiment of present invention, the control module is using unipolar control mode to the single-phase H bridge
Circuit is controlled, so that the single-phase H-bridge circuit carries out inversion work.
According to one embodiment of present invention, the target voltage is less than 300V.
In order to achieve the above objectives, a kind of onboard charger that fourth aspect present invention embodiment proposes, including the vehicle
Carry the self-checking unit of charger.
The onboard charger proposed according to embodiments of the present invention can not increased by the self-checking unit of onboard charger
Circuit is detected under conditions of Canadian dollar device, prevents power grid and battery from straight-through or short circuit situation occur, avoids charging back
There is high current in road, eliminates the hidden danger of damage onboard charger, charging pile and automobile batteries etc..
In order to achieve the above objectives, a kind of electric vehicle that fifth aspect present invention embodiment proposes, including described vehicle-mounted
Charger.
The electric vehicle proposed according to embodiments of the present invention, can be in the condition for not increasing component by onboard charger
Under circuit is detected, prevent power grid and battery from straight-through or short circuit situation occur, avoid charge circuit from high current occur, disappear
Except the hidden danger of damage onboard charger, charging pile and automobile batteries etc..
Detailed description of the invention
Fig. 1 is the flow chart according to the self checking method of the onboard charger of the embodiment of the present invention；
Fig. 2 is the structural schematic diagram according to the onboard charger of one embodiment of the invention；
Fig. 3 a is the schematic diagram according to the onboard charger of one embodiment of the invention when power grid positive half period charges,
In, power grid is by onboard charger to induction charging；
Fig. 3 b is the schematic diagram according to the onboard charger of another embodiment of the present invention when power grid positive half period charges,
Wherein, power grid and inductance charge the battery together；
Fig. 3 c is the schematic diagram according to the onboard charger of one embodiment of the invention when power grid negative half-cycle charges,
In, power grid is by onboard charger to induction charging；
Fig. 3 d is the schematic diagram according to the onboard charger of another embodiment of the present invention when power grid negative half-cycle charges,
Wherein, power grid and inductance charge the battery together；
Fig. 4 is the driving according to the unipolar control mode of the self checking method of the onboard charger of one embodiment of the invention
Waveform diagram；
Fig. 5 is the flow chart according to the self checking method of the onboard charger of a specific embodiment of the invention；
Fig. 6 is the block diagram according to the self-checking unit of the onboard charger of the embodiment of the present invention；
Fig. 7 is the block diagram according to the onboard charger of the embodiment of the present invention；And
Fig. 8 is the block diagram according to the electric car of the embodiment of the present invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings the principle that charges the battery of power grid after rifle is inserted in 2- Fig. 3 d description in the related technology.
As shown in Fig. 2, the front end of charging control switch Switch respectively with one end of power grid AC and front-end sampling U1 one
End is connected, and the rear end of charging control switch Switch samples one end of U2, one end and first of the first inductance L1 with rear end respectively
One end of capacitor C1 is connected, and the other end of the other end of front-end sampling U1, the other end of rear end sampling U2 and first capacitor C1 is equal
It is connected with the other end of power grid, one end of the second inductance L2 is connected with the other end of first capacitor C1, and the first inductance L1's is another
End is connected with one end of third switch transistor T 3, and the other end of the second inductance L2 is connected with one end of second switch T2, and second opens
Close pipe T2 one end be also connected with one end of first switch tube T1, one end of third switch transistor T 3 also with the 4th switch transistor T 4 one
End is connected, and the other end of first switch tube T1 and the other end of third switch transistor T 3 are connected with one end of battery Battery1,
The other end of second switch T2 and the other end of the 4th switch transistor T 4 are connected with the other end of battery Battery1.Wherein,
First switch tube T1, second switch T2, third switch transistor T 3 and the 4th switch transistor T 4 can be metal-oxide-semiconductor.
After user carries out plugging in rifle operation, charging control switch is attracted, normally opened in power grid positive half period third switch transistor T 3,
First switch tube T1 and second switch T2 replaces high-frequency work, third normally opened in the negative half-cycle first switch tube T1 of power grid
Switch transistor T 3 and the 4th switch transistor T 4 replace high-frequency work.Specifically, as shown in Figure 3a, in power grid positive half period, third is controlled
Switch transistor T 3 and first switch tube T1 are opened, and second switch T2 and the 4th switch transistor T 4 are closed, at this point, power grid AC is filled to inductance
Electricity；As shown in Figure 3b, it controls third switch transistor T 3 and second switch T2 is opened, first switch tube T1 and the 4th switch transistor T 4 are closed
It closes, at this point, inductive discharge, inductance and power grid AC give battery Battery1 to charge together；As shown in Figure 3c, in power grid negative half period
Phase controls first switch tube T1 and third switch transistor T 3 is opened, at this point, power grid AC is to induction charging；As shown in Figure 3d, control the
One switch transistor T 1 and the 4th switch transistor T 4 are opened, at this point, inductive discharge, inductance and power grid AC are filled to battery Battery1 together
Electricity.
Therefore, it when the switching tube failure in single-phase H-bridge circuit, is opened if being directly attracted charge control after the operation of plug in rifle
It closes, control switch pipe is normally opened in power grid positive half period third switch transistor T 3, and first switch tube T1 and second switch T2 are alternately high
Frequency works.Assuming that T2 Damage by Short Circuit can not disconnect, control T3 is normally opened at this time, and electric current passes through T2, T3 and is formed into a loop, power grid and battery
Two power supplys are straight-through, and charge circuit is caused high current occur, and it is hidden to there is damage onboard charger, charging pile and automobile batteries etc.
Suffer from.
Based on this, the embodiment of the present invention proposes a kind of self checking method of onboard charger.
Below with reference to the accompanying drawings the self checking method of onboard charger of proposition of the embodiment of the present invention, onboard charger described
Self-checking unit, onboard charger and electric vehicle.
Fig. 1 is the flow chart of the self checking method of the onboard charger proposed according to the embodiment of the present invention.Onboard charger packet
Single-phase H-bridge circuit and charging control switch are included, onboard charger will by single-phase H-bridge circuit under the control of charging control switch
The AC power source of input is converted to DC power supply, for power battery charging.
As shown in Figure 1, the self checking method for the onboard charger that the embodiment of the present invention proposes, comprising the following steps:
S1: before charging control switch closure, by controlling single-phase H-bridge circuit, battery is provided straight
Galvanic electricity inversion is alternating current.
That is, not being attracted charging control switch first when preparing charging after user plugs in rifle, but pass through disconnection
Charging control switch keeps apart power grid and battery, then first passes through and controls single-phase H-bridge circuit, battery is provided
DC inverter is alternating current.
According to one embodiment of present invention, single-phase H-bridge circuit is controlled using unipolar control mode, so that
Single-phase H-bridge circuit carries out inversion work.
Specifically, in embodiments of the present invention, can control according to the drive waveforms of Fig. 4 single-phase H bridge: T3 is normally opened,
T4 is often closed, and T1, T2 obtain positive half cycle voltage with higher switching frequency complementary switch；T1 is normally opened, and T2 is often closed, and T3, T4 are with higher
Switching frequency complementary switch, obtain negative half period voltage.Both available ideal sine output voltage had been guaranteed, also in very great Cheng
Switching loss is reduced on degree.
S2: alternating current is sampled to obtain sampled voltage.
Alternating current is sampled it should be noted that U2 can be sampled by rear end, i.e., sampled voltage is that rear end samples U2
Voltage.
S3: judge whether sampled voltage is consistent with target voltage.
According to one embodiment of present invention, target voltage is less than 300V.Wherein, target voltage may be configured as 220V.
Specifically, judge whether sampled voltage is in the positive and negative section of target voltage, wherein the positive and negative section of target voltage
Judge to sample if sampled voltage is in the positive and negative section of target voltage for positive and negative 10% error range of target voltage
Voltage is consistent with target voltage, if sampled voltage is not in the positive and negative section of target voltage, judges sampled voltage not
It is consistent with target voltage.
S4: if sampled voltage is consistent with target voltage, judge that onboard charger is in normal condition.
Further, when sampled voltage and target voltage are not consistent, judge that onboard charger breaks down.
That is, before charging control switch closure, first single-phase H bridge is controlled after user plugs in rifle, with
The DC inverter alternating current for providing battery, the alternating current then gone out to battery inversion carry out sampling and obtain sampled voltage,
Then judge whether sampled voltage is consistent with target voltage again, if sampled voltage is consistent with target voltage, sentence
Disconnected onboard charger be in normal condition, and then controllable charging control switch closure, and single-phase H bridge control think it is dynamic
The charging of power battery, if sampled voltage is not consistent with target voltage, judges that onboard charger breaks down, and stops charging
Security risk caused by operation damages to avoid metal-oxide-semiconductor.
The self checking method of onboard charger according to an embodiment of the present invention as a result, passes through the direct current for providing power battery
Electricity is reverse into alternating current, can recognize that switching tube whether damage, avoid in the case of switching tube has damaged start charging
Lead to the risk of onboard charger aircraft bombing, additionally it is possible to avoid two high voltage power supplies of power grid and power battery straight-through or short circuit, cause
The problem of there is high current and then damages charging pile and automobile batteries in charge circuit.In addition, can be controlled before charging by charging
System switch is isolated by power grid and power battery, to avoid operator by security risk.
A specific embodiment according to the present invention, as shown in figure 5, the onboard charger of the embodiment of the present invention from procuratorial organ
Method the following steps are included:
S101: insertion charging gun.
S102: single-phase H-bridge circuit and power battery generate electrical connection.
S103: being target alternating current by the DC inverter of battery.
S104: judge whether to obtain target alternating current.
If so, thening follow the steps S105；If not, thening follow the steps S110.
S105: switching tube is normal in single-phase H-bridge circuit.
S106: self-test passes through.
S107: control charging control switch closure.
S108: single-phase H-bridge circuit and power grid generate electrical connection.
S109: single-phase H bridge is controlled to charge to power battery.
S110: switching tube damages in single-phase H-bridge circuit.
S111: self-test does not pass through.
S112: terminate charging.
In conclusion the self checking method of the onboard charger proposed according to embodiments of the present invention, is closed in charging control switch
It before conjunction, is controlled by single-phase H-bridge circuit, using the DC inverter for providing battery as alternating current, alternating current is carried out
Sampling judges whether sampled voltage is consistent with target voltage, if sampled voltage and target voltage to obtain sampled voltage
It is consistent, then judges that onboard charger is in normal condition.The self checking method of the embodiment of the present invention can charge as a result,
Before, by judge inverter voltage that battery provides whether be consistent with target voltage detect single-phase H-bridge circuit whether failure,
So as to detect under conditions of not increasing component to circuit, prevent power grid and battery from straight-through or short circuit feelings occur
Condition avoids charge circuit from high current occur, eliminates the hidden danger of damage onboard charger, charging pile and automobile batteries etc..
The embodiment of the present invention also proposed a kind of non-transitorycomputer readable storage medium, be stored thereon with computer journey
Sequence realizes the self checking method of the onboard charger when program is executed by processor.
The non-provisional computer-readable recording mediums proposed according to embodiments of the present invention, can be in the item for not increasing component
Circuit is detected under part, prevents power grid and battery from straight-through or short circuit situation occur, charge circuit is avoided high current occur,
Eliminate the hidden danger of damage onboard charger, charging pile and automobile batteries etc..
Fig. 6 is the block diagram according to the self-checking unit of the onboard charger of the embodiment of the present invention.Onboard charger packet
Single-phase H-bridge circuit and charging control switch Switch are included, onboard charger passes through under the control of charging control switch Switch
The AC power source of input is converted to DC power supply by single-phase H-bridge circuit, for power battery Battery1 charging.
As shown in fig. 6, the self-checking unit 100 of the onboard charger of the embodiment of the present invention includes: control module 10, sampling mould
Block 20 and detection judgment module 30.
Wherein, control module 10 is used for before charging control switch Switch closure, by carrying out to single-phase H-bridge circuit
Control, using the DC inverter for providing battery Battery1 as alternating current；Sampling module 20 is for sampling alternating current
To obtain sampled voltage；Detection judgment module 30 is being sampled for judging whether sampled voltage is consistent with target voltage
When voltage and target voltage are consistent, judge that onboard charger is in normal condition.Wherein, sampling module 20 can be adopted for rear end
Sample U2.
Further, detection judgment module 30 is also used to, and when sampled voltage and target voltage are not consistent, judges vehicle
Charger is carried to break down.
That is, before charging control switch closure, control module 10 is first to single-phase H bridge after user plugs in rifle
It is controlled, so that the DC inverter that battery Battery1 is provided is alternating current, then sampling module 20 goes out battery inversion
Alternating current carry out sampling obtain sampled voltage, then detect judgment module 30 judge again sampled voltage whether with target voltage protect
It holds unanimously, if sampled voltage is consistent with target voltage, detects judgment module 30 and judge that onboard charger is in normal
State, and then control module 10 can control charging control switch to be closed, and carries out control to single-phase H bridge and think power battery
Battery1 charging, if sampled voltage is not consistent with target voltage, detects judgment module 30 and judges onboard charger
It breaks down, control module 10 stops security risk caused by charging operations damage to avoid metal-oxide-semiconductor.
The self checking method of onboard charger according to an embodiment of the present invention as a result, passes through the direct current for providing power battery
Electricity is reverse into alternating current, can recognize that switching tube whether damage, avoid in the case of switching tube has damaged start charging
Lead to the risk of onboard charger aircraft bombing, additionally it is possible to avoid two high voltage power supplies of power grid and power battery straight-through or short circuit, cause
The problem of there is high current and then damages charging pile and automobile batteries in charge circuit.In addition, can be controlled before charging by charging
System switch is isolated by power grid and power battery, to avoid operator by security risk.
According to one embodiment of present invention, control module 10 using unipolar control mode to single-phase H-bridge circuit into
Row control, so that single-phase H-bridge circuit carries out inversion work.
Wherein, be the characteristics of unipolar control mode in a switch periods two power tubes with higher switch frequency
Rate complementary switch guarantees available ideal sine output voltage, and another two power tubes are with lower output voltage frequency work
Make, to largely reduce switching loss.It specifically, in embodiments of the present invention, can be according to the drive waveforms of Fig. 4
Single-phase H bridge is controlled.
According to one embodiment of present invention, target voltage is less than 300V.Wherein, target voltage may be configured as 220V.
In conclusion the self-checking unit of the onboard charger proposed according to embodiments of the present invention, is being filled by control module
Before electric control switch closure, by controlling single-phase H-bridge circuit, by direct current that battery provides, you become exchanging
Electricity, sampling module sample alternating current to obtain sampled voltage, detection judgment module judge sampled voltage whether with target
Voltage is consistent, and when sampled voltage and target voltage are consistent, judges that onboard charger is in normal condition.By
This, the self-checking unit of the embodiment of the present invention can before charging, by judging whether the inverter voltage that battery provides is electric with target
Pressure be consistent detect single-phase H-bridge circuit whether failure, so as under conditions of not increasing component to circuit carry out
Detection prevents power grid and battery from straight-through or short circuit situation occur, charge circuit is avoided high current occur, and elimination damage is vehicle-mounted to fill
The hidden danger of electric appliance, charging pile and automobile batteries etc..
Fig. 7 is the block diagram according to the onboard charger of the embodiment of the present invention.As shown in fig. 7, the embodiment of the present invention
Onboard charger 200, the self-checking unit 100 including onboard charger.
The onboard charger proposed according to embodiments of the present invention can not increased by the self-checking unit of onboard charger
Circuit is detected under conditions of Canadian dollar device, prevents power grid and battery from straight-through or short circuit situation occur, avoids charging back
There is high current in road, eliminates the hidden danger of damage onboard charger, charging pile and automobile batteries etc..
Fig. 8 is the block diagram according to the electric vehicle of the embodiment of the present invention.As shown in figure 8, the embodiment of the present invention
Electric vehicle 300, including onboard charger 200.
The electric vehicle proposed according to embodiments of the present invention, can be in the condition for not increasing component by onboard charger
Under circuit is detected, prevent power grid and battery from straight-through or short circuit situation occur, avoid charge circuit from high current occur, disappear
Except the hidden danger of damage onboard charger, charging pile and automobile batteries etc..
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
Any process described otherwise above or method description are construed as in flow chart or herein, and expression includes
It is one or more for realizing custom logic function or process the step of executable instruction code module, segment or portion
Point, and the range of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discussed suitable
Sequence, including according to related function by it is basic simultaneously in the way of or in the opposite order, Lai Zhihang function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use
In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (such as computer based system, including the system of processor or other can be held from instruction
The instruction fetch of row system, device or equipment and the system executed instruction) it uses, or combine these instruction execution systems, device or set
It is standby and use.For the purpose of this specification, " computer-readable medium ", which can be, any may include, stores, communicates, propagates or pass
Defeated program is for instruction execution system, device or equipment or the dress used in conjunction with these instruction execution systems, device or equipment
It sets.The more specific example (non-exhaustive list) of computer-readable medium include the following: there is the electricity of one or more wirings
Interconnecting piece (electronic device), portable computer diskette box (magnetic device), random access memory (RAM), read-only memory
(ROM), erasable edit read-only storage (EPROM or flash memory), fiber device and portable optic disk is read-only deposits
Reservoir (CDROM).In addition, computer-readable medium can even is that the paper that can print described program on it or other are suitable
Medium, because can then be edited, be interpreted or when necessary with it for example by carrying out optical scanner to paper or other media
His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each section of the invention can be realized with hardware, software, firmware or their combination.Above-mentioned
In embodiment, software that multiple steps or method can be executed in memory and by suitable instruction execution system with storage
Or firmware is realized.Such as, if realized with hardware in another embodiment, following skill well known in the art can be used
Any one of art or their combination are realized: have for data-signal is realized the logic gates of logic function from
Logic circuit is dissipated, the specific integrated circuit with suitable combinational logic gate circuit, programmable gate array (PGA), scene can compile
Journey gate array (FPGA) etc..
Those skilled in the art are understood that realize all or part of step that above-described embodiment method carries
It suddenly is that relevant hardware can be instructed to complete by program, the program can store in a kind of computer-readable storage medium
In matter, which when being executed, includes the steps that one or a combination set of embodiment of the method.
It, can also be in addition, each functional unit in each embodiment of the present invention can integrate in a processing module
It is that each unit physically exists alone, can also be integrated in two or more units in a module.Above-mentioned integrated mould
Block both can take the form of hardware realization, can also be realized in the form of software function module.The integrated module is such as
Fruit is realized and when sold or used as an independent product in the form of software function module, also can store in a computer
In read/write memory medium.
Storage medium mentioned above can be read-only memory, disk or CD etc..Although having been shown and retouching above
The embodiment of the present invention is stated, it is to be understood that above-described embodiment is exemplary, and should not be understood as to limit of the invention
System, those skilled in the art can be changed above-described embodiment, modify, replace and become within the scope of the invention
Type.
Claims (11)
1. a kind of self checking method of onboard charger, which is characterized in that the onboard charger includes single-phase H-bridge circuit and charging
Control switch, the onboard charger is under the control of the charging control switch by the single-phase H-bridge circuit by input
AC power source is converted to DC power supply, with for power battery charging, the self checking method the following steps are included:
Before charging control switch closure, by controlling the single-phase H-bridge circuit, the battery is provided
DC inverter be alternating current；
The alternating current is sampled to obtain sampled voltage；
Judge whether the sampled voltage is consistent with target voltage；
If the sampled voltage is consistent with target voltage, judge that the onboard charger is in normal condition.
2. the self checking method of onboard charger according to claim 1, which is characterized in that when the sampled voltage and target
When voltage is not consistent, judge that the onboard charger breaks down.
3. the self checking method of onboard charger according to claim 1 or 2, which is characterized in that use unipolar control
Mode controls the single-phase H-bridge circuit, so that the single-phase H-bridge circuit carries out inversion work.
4. the self checking method of onboard charger according to claim 1, which is characterized in that the target voltage is less than
300V。
5. a kind of non-transitorycomputer readable storage medium, is stored thereon with computer program, which is characterized in that the program quilt
The self checking method of the onboard charger as described in any in claim 1-4 is realized when processor executes.
6. a kind of self-checking unit of onboard charger, which is characterized in that the onboard charger includes single-phase H-bridge circuit and charging
Control switch, the onboard charger is under the control of the charging control switch by the single-phase H-bridge circuit by input
AC power source is converted to DC power supply, and with for power battery charging, the self-checking unit includes:
Control module is used for before charging control switch closure, by controlling the single-phase H-bridge circuit, with
The DC inverter that the battery is provided is alternating current；
Sampling module, for being sampled the alternating current to obtain sampled voltage；
Judgment module is detected, for judging whether the sampled voltage is consistent with target voltage, and in the sampled voltage
When being consistent with target voltage, judge that the onboard charger is in normal condition.
7. the self-checking unit of onboard charger according to claim 6, which is characterized in that the detection judgment module is also used
In judging that the onboard charger breaks down when the sampled voltage and target voltage are not consistent.
8. the self-checking unit of onboard charger according to claim 6 or 7, which is characterized in that the control module uses
Unipolar control mode controls the single-phase H-bridge circuit, so that the single-phase H-bridge circuit carries out inversion work.
9. the self-checking unit of onboard charger according to claim 6, which is characterized in that the target voltage is less than
300V。
10. a kind of onboard charger, which is characterized in that including the onboard charger according to any one of claim 6-9
Self-checking unit.
11. a kind of electric vehicle, which is characterized in that including onboard charger as claimed in claim 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810359174.5A CN110395125A (en) | 2018-04-20 | 2018-04-20 | Self checking method and device, the onboard charger and electric vehicle of onboard charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810359174.5A CN110395125A (en) | 2018-04-20 | 2018-04-20 | Self checking method and device, the onboard charger and electric vehicle of onboard charger |
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| CN110395125A true CN110395125A (en) | 2019-11-01 |
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ID=68319489
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810359174.5A Pending CN110395125A (en) | 2018-04-20 | 2018-04-20 | Self checking method and device, the onboard charger and electric vehicle of onboard charger |
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| CN (1) | CN110395125A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112816817A (en) * | 2021-01-04 | 2021-05-18 | 阳光电源股份有限公司 | Switching unit state detection method and application device |
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| CN107666171A (en) * | 2016-07-28 | 2018-02-06 | 比亚迪股份有限公司 | Electric automobile, the onboard charger of electric automobile and its control method |
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Application publication date: 20191101 |