CN107437834A - A kind of double contactor control circuits and control method - Google Patents
A kind of double contactor control circuits and control method Download PDFInfo
- Publication number
- CN107437834A CN107437834A CN201710532604.4A CN201710532604A CN107437834A CN 107437834 A CN107437834 A CN 107437834A CN 201710532604 A CN201710532604 A CN 201710532604A CN 107437834 A CN107437834 A CN 107437834A
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- China
- Prior art keywords
- contactor
- management system
- battery management
- preset time
- double
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000005611 electricity Effects 0.000 claims description 43
- 238000010586 diagram Methods 0.000 description 4
- 238000010891 electric arc Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
-
- 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
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The invention discloses a kind of double contactor control circuits, double contactor control circuits include power module, first resistor, first contactor, second contactor, battery management system and load；The positive pole of power module is connected with the first end of first contactor, and it is connected by first resistor with the first end of second contactor, second end of first contactor and second contactor is connected by loading with the negative pole of power module, the negative pole ground connection of power module, battery management system are connected with first contactor and second contactor.The present invention also provides a kind of double contactor control methods.
Description
【Technical field】
The present invention relates to electric vehicle engineering field, more particularly to a kind of double contactor control circuits and control method.
【Background technology】
In electric automobile, either in running car or in battery pack charging, safety first is overriding concern
The problem of.Because the electric switching of electric automobile is typically completed using high-voltage DC contactor, therefore the stabilization of contactor performance
Property, directly affect the safe operation of vehicle.For contactor, be substantially burnt in upper electric and lower electric moment it is tactile
Point, it can cause contact is viscous to stubbornly refuse to switch when serious.
If in electric automobile during traveling, BMS (Battery Management System, battery management system) has found
The brownout of some cell in battery pack, BMS can send alarm to Full Vehicle System, if driver is at the appointed time not
Can parking, BMS systems can direct tripping contactor, due to contactor bringing onto load switch can produce very big electric arc, easily burn and connect
The contact of tentaculum；Secondly, if in the case where charging pile charges to battery pack, because charging circuit only has one group of contactor to cut
Change jobs, upper electric or lower TURP easily produces big electric arc when changing, and easily burns the contact of contactor, causes contact viscous dead, such as
The equipment of fruit charging pile can not communicate with BMS, or charging pile voltage is higher than normal voltage, and such charging pile can be always to electricity
Pond group charging, and then cause seriously to overshoot, in some instances it may even be possible to trigger fire.
In consideration of it, real be necessary to provide a kind of double contactor control circuits and control method to overcome drawbacks described above.
【The content of the invention】
It is an object of the invention to provide a kind of double contactor control circuits and double contactor control methods, can avoid connecing
Tentaculum is impacted by super-high-current when upper electric or lower electric.
To achieve these goals, the present invention provides a kind of double contactor control circuits, double contactor control circuits
Including power module, first resistor, first contactor, second contactor, battery management system and load；The power module
Positive pole is connected with the first end of the first contactor, and passes through the first end phase of the first resistor and the second contactor
Even, the second end of the first contactor and the second contactor passes through negative pole phase of the load with the power module
Even, the negative pole ground connection of the power module, the battery management system and the first contactor and the second contactor phase
Even；The battery management system is used to judge whether to receive electricity instruction or lower electricity instruction；Instructed when receiving the upper electricity
When, the battery management system controls the second contactor to control the first contactor to close after closing the first preset time
Close, and control the second contactor to disconnect after first relay closes the second preset time；When receive it is described under
During electricity instruction, the battery management system controls the second contactor to control first contact after closing the 3rd preset time
Device disconnects, and controls the second contactor to disconnect after the first contactor disconnects the 4th preset time.
When receiving the upper electricity instruction, upper electrosemaphore position is also labeled as 1 by the battery management system；When receiving
During the lower electricity instruction, the battery management system also detects whether the upper electrosemaphore position is 1；When detect it is described it is upper electricity mark
When will position is not 1, the battery management system sends fault alarm；When it is 1 to detect the upper electrosemaphore position, the battery
Management system removes the upper electrosemaphore position.
The present invention also provides double contactor control methods, and it is applied in double contactor control circuits, double contactors
Control circuit includes power module, first resistor, first contactor, second contactor, battery management system and load；It is described double
Contactor control method includes：
The battery management system judges whether to receive electricity instruction；
When the battery management system receives the upper electricity instruction, the battery management system control described second connects
Tentaculum closes and starts to calculate the closing time of the second contactor；
The battery management system judges whether the closing time of the second contactor reaches the first preset time；
If the closing time of the second contactor reaches the first preset time, the battery management system control described the
One contactor closes and starts to calculate the closing time of the first contactor；
The battery management system judges whether the closing time of the first contactor reaches the second preset time；
If the closing time of the first contactor reaches the second preset time, the battery management system control described the
Two contactors disconnect；
When the battery management system is not received by the upper electricity instruction, the battery management system judges whether to connect
Receive lower electricity instruction；
When the battery management system receives the lower electricity instruction, the battery management system control described second connects
Tentaculum closes and starts to calculate the closing time of the second contactor；
The battery management system judges whether the closing time of the second contactor reaches the 3rd preset time；
If the closing time of the second contactor reaches the 3rd preset time, the battery management system control described the
One contactor disconnects and starts to calculate the turn-off time of the first contactor；
The battery management system judges whether the turn-off time of the first contactor reaches the 4th preset time；
If the turn-off time of the first contactor reaches the 4th preset time, the battery management system control described the
Two contactors disconnect；
When the battery management system receives the upper electricity instruction, the battery management system also marks the upper electricity
Will position is labeled as 1；
When the battery management system receives the lower electricity instruction, the battery management system also detects the upper electricity
Whether flag bit is 1；
When it is not 1 that the battery management system, which detects the upper electrosemaphore position, the battery management system sends event
Barrier alarm；
When it is 1 that the battery management system, which detects the upper electrosemaphore position, described in the battery management system removing
Upper electrosemaphore position.
Double contactor control circuits provided by the invention and double contactor control methods, by the power module with
The first contactor, second contactor and first resistor are set in the power supply circuit of the load, and institute is controlled by the BMS
State closure and the disconnection of first contactor and the second contactor, avoid in the power module and the load electricity or under
When electric, the first contactor and the second contactor influence by large impact electric current.
【Brief description of the drawings】
Fig. 1 is the circuit diagram for double contactor control circuits that embodiment of the present invention provides.
Fig. 2 is the circuit diagram for double contactor control circuits that embodiment of the present invention provides.
Fig. 3 is the circuit diagram for double contactor control circuits that embodiment of the present invention provides.
Fig. 4 is the flow chart for double contactor control methods that embodiment of the present invention provides.
Fig. 5 is the flow chart for double contactor control methods that embodiment of the present invention provides.
Fig. 6 is the flow chart for double contactor control methods that embodiment of the present invention provides.
【Embodiment】
In order that the purpose of the present invention, technical scheme and advantageous effects become apparent from understanding, below in conjunction with this hair
Accompanying drawing in bright embodiment, the technical scheme in embodiment of the present invention is clearly and completely described, it is clear that retouched
The embodiment stated only a part of embodiment of the present invention, rather than whole embodiments.Based on the reality in the present invention
Apply mode, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made,
Belong to the scope of protection of the invention.
When an element was considered as with another element " being connected ", it can be directly to another element or
It may be simultaneously present centering elements.Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to this hair
The implication that bright those skilled in the art are generally understood that is identical.Term used in the description of the invention herein
It is intended merely to describe the purpose of specific embodiment, it is not intended that in the limitation present invention.
Referring to Fig. 1, a kind of double contactor control circuits 100 provided by the invention, including power module 10, first resistor
R1, first contactor K1, second contactor K2, BMS20 and load 30.The positive pole of the power module 10 connects with described first
Tentaculum K1 first end is connected, and is connected by the first resistor R1 with the first end of the second contactor K2, and described
One contactor K1 and the second contactor K2 the second end are connected by the load 30 with the negative pole of the power module 10,
The negative pole ground connection of the power module 10, the BMS20 are connected with the first contactor K1 and the second contactor K2.
The power module 10 is HVDC power supply, and the power module 10 can be battery bag or charging pile.
As shown in Fig. 2 when the power module 10 is battery bag, the load 30 includes the motor R2 of electric capacity C1 and electric car, institute
State power module 10 be used for for electric car motor R2 power supply.The of the first contactor K1 and second contactor K2
Two ends are connected by the electric capacity C1 with the negative pole of the power module 10, and the motor R2 by the electric car and the electricity
The negative pole of source module 10 is connected.As shown in figure 3, when the power module 10 is charging pile, the load 30 is electric car
Battery bag V1.The positive pole of the battery bag V1 is connected with the first contactor K1 and the second contactor K2 the second end,
The negative pole of the battery bag V1 is connected with the negative pole of the power module 10.
The principle of above-mentioned double contactor control circuits 100 is described in detail with reference to Fig. 4 to Fig. 6.
As shown in Figures 4 to 6, its be double contactor control methods in the embodiment of the present invention flow chart.It should illustrate
It is that method of the invention is not limited to the order of following step, and in other embodiment, method of the invention can only include
A portion of step as described below, or part steps therein can be deleted.
Step S01, the BMS20 judge whether that receiving electricity instructs.If the BMS20 receives electricity instruction, enter
Enter step S02；If the BMS20 is not received by electricity instruction, into step S08.When the power module 10, described
When BMS20 and 30 self-tests of the load can normally start working, the power module 10 and the load 30 send report of shaking hands
For text to the BMS20, i.e., described BMS20 receives electricity instruction.
Upper electrosemaphore position is labeled as 1 by step S02, the BMS20.
Step S03, the BMS20 control the second contactor K2 to close and start to calculate the second contactor K2's
Closing time.Now, the power module 10, the first resistor R1, the second contactor K2 and the load 30 are formed
Loop, because of the metering function of the first resistor R1, limited by the electric current of the second contactor K2, described second connects
Tentaculum K2 will not be burned out because of excessive dash current.When the power module 10 is battery bag, the load 30 includes electricity
During the motor R2 of appearance C1 and electric car, the battery bag is by the first resistor R1 and the second contactor K2 to the electricity
Hold C1 and enter line precharge.
Step S04, the BMS20 judge whether the closing time of the second contactor K2 reaches the first preset time.
If the closing time of the second contactor K2 reaches the first preset time, into step S05；If the second contactor K2's
Closing time is not reaching to the first preset time, then continues to judge.When the closing time of the second contactor K2 reaches first
Preset time, the voltage of the pre-charge pressure of the electric capacity C1 close to the battery bag.
Step S05, the BMS20 control the first contactor K1 to close and start to calculate the first contactor K1's
Closing time.The pre-charge pressure of the electric capacity C1 is close to the voltage of the battery bag, and the voltage of the battery bag is close to institute
The output voltage of charging pile is stated, will not be very big by the electric current of the first contactor K1.
Step S06, the BMS20 judge whether the closing time of the first contactor K1 reaches the second preset time.
If the closing time of the first contactor K1 reaches the second preset time, into step S07；If the first contactor K1's
Closing time is not reaching to the second preset time, then continues to judge.
Step S07, the BMS20 control the second contactor K2 to disconnect.The power module 10 is the load 30
Power supply.
Step S08, the BMS20 judge whether that receiving lower electricity instructs.If the BMS20 receives lower electricity instruction, enter
Enter step S09；If the BMS20 is not received by lower electricity instruction, continue to judge.
Step S09, whether electrosemaphore position is 1 in the BMS20 detections.If the upper electrosemaphore position is 1, the power supply mould
Block 10 is in power-up state with the load 30, into step S10；If the upper electrosemaphore position is not 1, into step S16.
Step S10, the BMS20, which removes the upper electrosemaphore position, makes the upper electrosemaphore position not be 1.
Step S11, the BMS20 control the second contactor K2 to close and start to calculate the second contactor K2's
Closing time.
Step S12, the BMS20 judge whether the closing time of the second contactor K2 reaches the 3rd preset time.
If the closing time of the second contactor K2 reaches the 3rd preset time, into step S13；If the second contactor K2's
Closing time is not reaching to the 3rd preset time, then continues to judge.
Step S13, the BMS20 control the first contactor K1 to disconnect and start to calculate the first contactor K1's
Turn-off time.Because the power module 10, the first resistor R1, the second contactor K2 and the load 30 are formed back
Road, when the first contactor K1 disconnects, the first resistor R1 and the second contactor K2 are carried out to the total current of circuit
Shunting, the first contactor K1 will not be influenceed by excessive dash current.
Step S14, the BMS20 judge whether the turn-off time of the first contactor K1 reaches the 4th preset time.
If the turn-off time of the first contactor K1 reaches the 4th preset time, into step S15；If the first contactor K1's
Turn-off time is not reaching to the 4th preset time, into judgement.
Step S15, the BMS20 control the second contactor K2 to disconnect.The power module 10 stops to be described negative
Carry 30 power supplies.
Step S16, the BMS20 send fault warning.
In the present embodiment, first preset time, second preset time, the 3rd preset time and institute
It is equal and be 2 seconds to state the 4th preset time.
Double contactor control circuits 100 provided by the invention and double contactor control methods, by the power supply mould
The first contactor K1, second contactor K2 and first resistor R1 are set in block 10 and the power supply circuit of the load 30, and
Closure and the disconnection of the first contactor K1 and second contactor K2 is controlled by the BMS20, avoids the power supply
When electric or lower electric in module 10 and the load 30, the first contactor K1 and the second contactor K2 are by large impact
The influence of electric current.
The present invention is not restricted to described in specification and embodiment, therefore for the personnel of familiar field
Additional advantage and modification is easily achieved, therefore in the essence of the universal limited without departing substantially from claim and equivalency range
In the case of refreshing and scope, the present invention is not limited to specific details, representational equipment and shown here as the diagram with description
Example.
Claims (9)
- A kind of 1. double contactor control circuits, it is characterised in that：Double contactor control circuits include power module, the first electricity Resistance, first contactor, second contactor, battery management system and load；The positive pole of the power module contacts with described first The first end of device is connected, and is connected by the first resistor with the first end of the second contactor, the first contactor And the second end of the second contactor is connected by the load with the negative pole of the power module, the power module is born Pole is grounded, and the battery management system is connected with the first contactor and the second contactor；The battery management system For judging whether to receive upper electricity instruction or lower electricity instruction；When receiving the upper electricity instruction, the battery management system The second contactor is controlled to control the first contactor to close after closing the first preset time, and in first relay The second contactor is controlled to disconnect after closing the second preset time；When receiving the lower electricity instruction, the battery management System controls the second contactor to control the first contactor to disconnect after closing the 3rd preset time, and is connect described first Tentaculum controls the second contactor to disconnect after disconnecting the 4th preset time.
- 2. double contactor control circuits as claimed in claim 1, it is characterised in that：When receiving the upper electricity instruction, institute State battery management system and upper electrosemaphore position is also labeled as 1；When receiving the lower electricity instruction, the battery management system is also Detect whether the upper electrosemaphore position is 1；When it is not 1 to detect the upper electrosemaphore position, the battery management system is sent Fault alarm；When it is 1 to detect the upper electrosemaphore position, the battery management system removes the upper electrosemaphore position.
- 3. double contactor control circuits as claimed in claim 1, it is characterised in that：The power module is battery bag, described Load includes the motor of electric capacity and electric car；Second end of the first contactor and the second contactor passes through the electric capacity It is connected with the negative pole of the power module, and is connected by the motor of the electric car with the negative pole of the power module.
- 4. double contactor control circuits as claimed in claim 1, it is characterised in that：The power module is charging pile, described Load the battery bag for electric car, the positive pole of the battery bag and the second end of the first contactor and the second contactor It is connected, the negative pole of the battery bag is connected with the negative pole of the power module.
- 5. double contactor control circuits as claimed in claim 1, it is characterised in that：First preset time, described second Preset time, the 3rd preset time and the 4th preset time are equal.
- 6. double contactor control circuits as claimed in claim 5, it is characterised in that：First preset time, described second Preset time, the 3rd preset time and the 4th preset time are 2 seconds.
- 7. a kind of double contactor control methods, it is applied in double contactor control circuits, double contactor control circuit bags Include power module, first resistor, first contactor, second contactor, battery management system and load；It is characterized in that：It is described Double contactor control methods include：The battery management system judges whether to receive electricity instruction；When the battery management system receives the upper electricity instruction, the battery management system controls the second contactor Close and start to calculate the closing time of the second contactor；The battery management system judges whether the closing time of the second contactor reaches the first preset time；If the closing time of the second contactor reaches the first preset time, the battery management system control described first connects Tentaculum closes and starts to calculate the closing time of the first contactor；The battery management system judges whether the closing time of the first contactor reaches the second preset time；If the closing time of the first contactor reaches the second preset time, the battery management system control described second connects Tentaculum disconnects.
- 8. double contactor control methods as claimed in claim 7, it is characterised in that：Double contactor control methods are also wrapped Include：When the battery management system is not received by the upper electricity instruction, the battery management system judges whether to receive Lower electricity instruction；When the battery management system receives the lower electricity instruction, the battery management system controls the second contactor Close and start to calculate the closing time of the second contactor；The battery management system judges whether the closing time of the second contactor reaches the 3rd preset time；If the closing time of the second contactor reaches the 3rd preset time, the battery management system control described first connects Tentaculum disconnects and starts to calculate the turn-off time of the first contactor；The battery management system judges whether the turn-off time of the first contactor reaches the 4th preset time；If the turn-off time of the first contactor reaches the 4th preset time, the battery management system control described second connects Tentaculum disconnects.
- 9. double contactor control methods as claimed in claim 8, it is characterised in that：Double contactor control methods are also wrapped Include：When the battery management system receives the upper electricity instruction, the battery management system is also by the upper electrosemaphore position Labeled as 1；When the battery management system receives the lower electricity instruction, the battery management system also detects the upper electrosemaphore Whether position is 1；When it is not 1 that the battery management system, which detects the upper electrosemaphore position, the battery management system sends failure report It is alert；When it is 1 that the battery management system, which detects the upper electrosemaphore position, the battery management system removes the upper electricity Flag bit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710532604.4A CN107437834A (en) | 2017-07-03 | 2017-07-03 | A kind of double contactor control circuits and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710532604.4A CN107437834A (en) | 2017-07-03 | 2017-07-03 | A kind of double contactor control circuits and control method |
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| Publication Number | Publication Date |
|---|---|
| CN107437834A true CN107437834A (en) | 2017-12-05 |
Family
ID=60459716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710532604.4A Pending CN107437834A (en) | 2017-07-03 | 2017-07-03 | A kind of double contactor control circuits and control method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110518662A (en) * | 2019-08-28 | 2019-11-29 | 山东元齐新动力科技有限公司 | Battery pack charging unit and control method |
| CN111786439A (en) * | 2020-07-31 | 2020-10-16 | 中车青岛四方机车车辆股份有限公司 | Pre-charging circuit, charging system, pre-charging method and train |
| CN113644859A (en) * | 2021-08-17 | 2021-11-12 | 河南牧原智能科技有限公司 | Power-on method, device and equipment for high-voltage distribution box of new energy automobile |
| CN114256829A (en) * | 2021-11-29 | 2022-03-29 | 华为数字能源技术有限公司 | Power supply circuit and control method thereof |
-
2017
- 2017-07-03 CN CN201710532604.4A patent/CN107437834A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110518662A (en) * | 2019-08-28 | 2019-11-29 | 山东元齐新动力科技有限公司 | Battery pack charging unit and control method |
| CN111786439A (en) * | 2020-07-31 | 2020-10-16 | 中车青岛四方机车车辆股份有限公司 | Pre-charging circuit, charging system, pre-charging method and train |
| CN113644859A (en) * | 2021-08-17 | 2021-11-12 | 河南牧原智能科技有限公司 | Power-on method, device and equipment for high-voltage distribution box of new energy automobile |
| CN114256829A (en) * | 2021-11-29 | 2022-03-29 | 华为数字能源技术有限公司 | Power supply circuit and control method thereof |
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Application publication date: 20171205 |