CN113335098A - Electric vehicle charging architecture compatible with 400V and 800V charging voltages and charging method thereof - Google Patents
Electric vehicle charging architecture compatible with 400V and 800V charging voltages and charging method thereof Download PDFInfo
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- CN113335098A CN113335098A CN202110618681.8A CN202110618681A CN113335098A CN 113335098 A CN113335098 A CN 113335098A CN 202110618681 A CN202110618681 A CN 202110618681A CN 113335098 A CN113335098 A CN 113335098A
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- 238000000034 method Methods 0.000 title claims abstract description 13
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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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
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
-
- 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
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
- B60L53/22—Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
-
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses an electric vehicle charging framework compatible with two charging voltages of 400V and 800V, which comprises a standard charging port, a vehicle-mounted charging control module and a charging system, wherein the standard charging port is connected with the vehicle-mounted charging control module; the charging system comprises two groups of battery modules with the voltage of 400V, a single-pole single-throw switch relay, a single-pole double-throw switch relay and two main fuses; the vehicle-mounted charging control module is used for controlling and driving switches of the single-pole single-throw switch relay and the single-pole double-throw switch relay, and controlling and driving a main circuit breaker for charging; provided are an electric vehicle charging architecture and a charging method thereof, which support compatibility of two charging voltages of 400V and 800V by changing the series-parallel connection relationship of battery modules.
Description
Technical Field
The invention relates to the field of electric vehicle charging, in particular to an electric vehicle charging framework compatible with two charging voltages of 400V and 800V and a charging method thereof. More specifically, the series-parallel connection relationship of the battery modules is changed to support the compatible 400V and 800V charging modes.
Background
A common electric vehicle is a high-voltage battery 400V, can be compatible with most direct-current charging piles, and has the defect that the fast-charging power is limited by the increase of current. The market is developing to high-voltage battery 800V at present, generally adopts 800V ultrafast charge mouth and "400V direct current charge mouth +400V boost module". The voltage boosting module is added, the design requirements of an insulating device and a DCDC inverter are increased due to the voltage boosting of the whole vehicle, and therefore the cost boosting range of the whole vehicle is large.
Disclosure of Invention
The invention aims to provide an electric vehicle charging framework and a charging method thereof, wherein the electric vehicle charging framework is compatible with two charging voltages of 400V and 800V by changing the series-parallel relation of battery modules.
The technical scheme of the invention is as follows: the electric vehicle charging architecture compatible with two charging voltages of 400V and 800V comprises a standard charging port, a vehicle-mounted charging control module and a charging system;
the charging system comprises two groups of battery modules with the voltage of 400V, a single-pole single-throw switch relay, a single-pole double-throw switch relay and two main fuses;
one end of the first group of battery modules is grounded, the other end of the first group of battery modules is respectively connected with a movable contact of a single-pole single-throw switch relay and a first movable contact of a single-pole double-throw switch relay, a static contact of the single-pole single-throw switch relay is connected with one end of a first main fuse, and the other end of the first main fuse is connected with a standard charging port;
the second movable contact of the single-pole double-throw switch relay is grounded, the stationary contact of the single-pole double-throw switch relay is connected with one end of a second group of battery modules, the other end of the second group of battery modules is connected with one end of a second main fuse, and the other end of the second main fuse is connected with a standard charging port;
the vehicle-mounted charging control module is used for controlling and driving switches of the single-pole single-throw switch relay and the single-pole double-throw switch relay, and controlling and driving a main circuit breaker for charging.
Furthermore, the first group of battery modules and the second group of battery modules are formed by connecting 3 single modules with the voltage of 400V in parallel.
Furthermore, a hardware interlocking structure is designed between the single-pole single-throw switch relay and the single-pole double-throw switch relay, and the first movable contact of the single-pole double-throw switch relay is allowed to be closed only after the single-pole single-throw switch relay is disconnected.
Furthermore, the charging system adopts a 12V low-voltage storage battery of lithium iron phosphate to supply power at low voltage. The charging system is ensured to be more reliable and durable in the high-voltage quick charging stage.
Furthermore, the whole vehicle adopts a compressor and a fan which support two input voltages of 400V and 800V.
Further, the vehicle-mounted charging control module is a VCU vehicle control unit or a BMS battery management system.
The invention also provides an electric vehicle charging method compatible with two charging voltages of 400V and 800V, which comprises the following specific steps:
step one, inserting a direct current charging gun;
step two, the vehicle-mounted charging control module judges whether the direct current charging is carried out according to the national standard or the European standard 400V standard, if so, the direct current charging is carried out according to the national standard or the European standard 400V standard, the first group of battery modules and the second group of battery modules default to be in a parallel connection relationship, the single-pole single-throw switch relay is in a closed state, and the single-pole double-throw switch relay is closed for a second movable contact; if not, entering the third step;
step three, the vehicle controls the high-voltage power supply of the whole vehicle high-voltage electric appliances except the compressor and the fan to be disconnected, the vehicle-mounted charging control module drives the single-throw switch relay to be switched to be in a disconnected state, whether the single-throw switch relay is in the disconnected state or not is confirmed, if yes, the step four is carried out, and if not, the step is exited;
step four, the vehicle-mounted charging control module drives a second movable contact of the single-pole double-throw switch relay to be disconnected, the first movable contact is closed, and a high-voltage 800V quick charging process is executed;
step five, after the high-voltage 800v charging is finished, the vehicle-mounted charging control module drives a first movable contact of the single-pole double-throw switch relay to be disconnected, and a second movable contact of the single-pole double-throw switch relay to be closed;
sixthly, driving the single-pole single-throw switch relay to be closed after confirming the state of the single-pole single-throw switch relay;
and seventhly, electrifying the whole vehicle at high voltage and recovering the working state.
Further, in the fifth step, if the high-voltage 800v charging is stopped due to a fault, the vehicle-mounted charging control module drives the first movable contact of the single-pole double-throw switch relay to be disconnected, the second movable contact of the single-pole double-throw switch relay to be closed, and then the vehicle-mounted charging control module exits.
The invention has the beneficial effects that: the series-parallel connection relation of the internal modules of the battery pack is changed through the two mode switching relays, the 400V standard charging is compatible, meanwhile, the enterprise-standard 800V high-voltage quick charging is supported, the 800V high-voltage insulation design only needs to cover a charging related system, and the cost is greatly reduced.
Only two mode switching relays are used and the safety of switching is ensured by state confirmation and the design of double fuses. The two main fuses are used to prevent any possible short circuit or overcurrent during charging or use.
Drawings
Fig. 1 is a charging architecture diagram compatible with two charging voltages, 400V and 800V.
FIG. 2 is a flow chart illustrating an exemplary embodiment of the present invention.
In the figure: the battery module comprises a first group of battery modules, a second group of battery modules, a single-pole single-throw switch relay, a fixed contact, a movable contact, a single-pole single-throw switch relay, a fixed contact, a single-pole double-throw switch relay, a first movable contact, a second movable contact, a first main fuse and a second main fuse, wherein the first group of battery modules is 1, the second group of battery modules is 2, the fixed contact is 3, the movable contact is 4, the fixed contact is 5, the first movable contact is 6, the second movable contact is 7, the second movable contact is 8, and the second main fuse is 9.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The electric vehicle charging architecture compatible with two charging voltages of 400V and 800V comprises a standard charging port, a vehicle-mounted charging control module and a charging system shown in figure 1; the charging system adopts a 12V low-voltage storage battery of lithium iron phosphate to supply power at low voltage. The charging system is ensured to be more reliable and durable in the high-voltage quick charging stage.
The standard charging port is commonly known. The charging port conforms to the national standard GBT-20234 or the European standard IEC-62169. Default to a standard 400V charging mode. After the 800V super fast charging gun of the enterprise logo is inserted, the pile end initiates a data matching request, and after the vehicle end confirms that the mode is switched to the 800V fast charging mode, the pile end and the vehicle end work along the 800V super fast charging flow.
The charging system comprises two groups of battery modules with the voltage of 400V, a single-pole single-throw switch relay, a single-pole double-throw switch relay and two main fuses; the first group of battery modules and the second group of battery modules are formed by connecting 3 single modules with the voltage of 400V in parallel.
One end of a first group of battery modules 1 is grounded, the other end of the first group of battery modules 1 is respectively connected with a movable contact 4 of a single-pole single-throw switch relay and a first movable contact 6 of a single-pole double-throw switch relay, a fixed contact 3 of the single-pole single-throw switch relay is connected with one end of a first main fuse 8, and the other end of the first main fuse 8 is connected with a standard charging port;
a second movable contact 7 of the single-pole double-throw switch relay is grounded, a stationary contact 5 of the single-pole double-throw switch relay is connected with one end of a second group of battery modules 2, the other end of the second group of battery modules 2 is connected with one end of a second main fuse 9, and the other end of the second main fuse 9 is connected with a standard charging port;
the vehicle-mounted charging control module is used for controlling and driving switches of the single-pole single-throw switch relay and the single-pole double-throw switch relay, and controlling and driving a main circuit breaker for charging. A hardware interlocking structure is designed between the single-pole single-throw switch relay and the single-pole double-throw switch relay, and the first movable contact of the single-pole double-throw switch relay is allowed to be closed after the single-pole single-throw switch relay is disconnected.
The whole vehicle adopts a compressor and a fan which support two input voltages of 400V and 800V. The vehicle-mounted charging control module is a VCU vehicle control unit or a BMS battery management system and the like.
The charging method of the electric vehicle compatible with two charging voltages of 400V and 800V comprises the following specific steps.
Step one, inserting a direct current charging gun;
step two, the vehicle-mounted charging control module judges whether the direct current charging is carried out according to the national standard or the European standard 400V standard, if so, the direct current charging is carried out according to the national standard or the European standard 400V standard, the first group of battery modules and the second group of battery modules default to be in a parallel connection relationship, the single-pole single-throw switch relay is in a closed state, and the single-pole double-throw switch relay is closed for a second movable contact; if not, entering the third step;
step three, the vehicle controls the high-voltage power supply of the whole vehicle high-voltage electric appliances except the compressor and the fan to be disconnected, the vehicle-mounted charging control module drives the single-throw switch relay to be switched to be in a disconnected state, whether the single-throw switch relay is in the disconnected state or not is confirmed, if yes, the step four is carried out, and if not, the step is exited;
step four, the vehicle-mounted charging control module drives a second movable contact of the single-pole double-throw switch relay to be disconnected, the first movable contact is closed, and a high-voltage 800V quick charging process is executed;
step five, after the high-voltage 800v charging is finished, the vehicle-mounted charging control module drives a first movable contact of the single-pole double-throw switch relay to be disconnected, and a second movable contact of the single-pole double-throw switch relay to be closed;
sixthly, driving the single-pole single-throw switch relay to be closed after confirming the state of the single-pole single-throw switch relay;
and seventhly, electrifying the whole vehicle at high voltage and recovering the working state.
If the high-voltage 800v charging is stopped due to a fault in the fifth step, the same vehicle-mounted charging control module drives the first movable contact of the single-pole double-throw switch relay to be disconnected, the second movable contact of the single-pole double-throw switch relay to be closed, and then the vehicle-mounted charging control module exits.
The series-parallel connection relation of the internal modules of the battery pack is changed through the two mode switching relays, the 400V standard charging is compatible, meanwhile, the enterprise-standard 800V high-voltage quick charging is supported, the 800V high-voltage insulation design only needs to cover a charging related system, and the cost is greatly reduced.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. Compatible two kinds of charging voltage's of 400V and 800V electric motor car framework of charging which characterized in that: the charging system comprises a standard charging port, a vehicle-mounted charging control module and a charging system;
the charging system comprises two groups of battery modules with the voltage of 400V, a single-pole single-throw switch relay, a single-pole double-throw switch relay and two main fuses;
one end of the first group of battery modules is grounded, the other end of the first group of battery modules is respectively connected with a movable contact of a single-pole single-throw switch relay and a first movable contact of a single-pole double-throw switch relay, a static contact of the single-pole single-throw switch relay is connected with one end of a first main fuse, and the other end of the first main fuse is connected with a standard charging port;
the second movable contact of the single-pole double-throw switch relay is grounded, the stationary contact of the single-pole double-throw switch relay is connected with one end of a second group of battery modules, the other end of the second group of battery modules is connected with one end of a second main fuse, and the other end of the second main fuse is connected with a standard charging port;
the vehicle-mounted charging control module is used for controlling and driving switches of the single-pole single-throw switch relay and the single-pole double-throw switch relay, and controlling and driving a main circuit breaker for charging.
2. The electric vehicle charging architecture compatible with both 400V and 800V charging voltages of claim 1, wherein: the first group of battery modules and the second group of battery modules are formed by connecting 3 single modules with the voltage of 400V in parallel.
3. The electric vehicle charging architecture compatible with both 400V and 800V charging voltages of claim 1, wherein: a hardware interlocking structure is designed between the single-pole single-throw switch relay and the single-pole double-throw switch relay, and the first movable contact of the single-pole double-throw switch relay is allowed to be closed after the single-pole single-throw switch relay is disconnected.
4. The electric vehicle charging architecture compatible with both 400V and 800V charging voltages of claim 1, wherein: the charging system adopts a 12V low-voltage storage battery of lithium iron phosphate to supply power at low voltage.
5. The electric vehicle charging architecture compatible with both 400V and 800V charging voltages of claim 1, wherein: the whole vehicle adopts a compressor and a fan which support two input voltages of 400V and 800V.
6. The electric vehicle charging architecture compatible with both 400V and 800V charging voltages of claim 1, wherein: the vehicle-mounted charging control module is a VCU vehicle control unit or a BMS battery management system.
7. The electric vehicle charging method compatible with two charging voltages of 400V and 800V is characterized in that: the method comprises the following specific steps:
step one, inserting a direct current charging gun;
step two, the vehicle-mounted charging control module judges whether the direct current charging is carried out according to the national standard or the European standard 400V standard, if so, the direct current charging is carried out according to the national standard or the European standard 400V standard, the first group of battery modules and the second group of battery modules default to be in a parallel connection relationship, the single-pole single-throw switch relay is in a closed state, and the single-pole double-throw switch relay is closed for a second movable contact; if not, entering the third step;
step three, the vehicle controls the high-voltage power supply of the whole vehicle high-voltage electric appliances except the compressor and the fan to be disconnected, the vehicle-mounted charging control module drives the single-throw switch relay to be switched to be in a disconnected state, whether the single-throw switch relay is in the disconnected state or not is confirmed, if yes, the step four is carried out, and if not, the step is exited;
step four, the vehicle-mounted charging control module drives a second movable contact of the single-pole double-throw switch relay to be disconnected, the first movable contact is closed, and a high-voltage 800V quick charging process is executed;
step five, after the high-voltage 800v charging is finished, the vehicle-mounted charging control module drives a first movable contact of the single-pole double-throw switch relay to be disconnected, and a second movable contact of the single-pole double-throw switch relay to be closed;
sixthly, driving the single-pole single-throw switch relay to be closed after confirming the state of the single-pole single-throw switch relay;
and seventhly, electrifying the whole vehicle at high voltage and recovering the working state.
8. The method of claim 7 for charging an electric vehicle compatible with both 400V and 800V charging voltages, wherein: in the fifth step, if the high-voltage 800v charging is stopped due to a fault, the vehicle-mounted charging control module drives the first movable contact of the single-pole double-throw switch relay to be disconnected, the second movable contact of the single-pole double-throw switch relay to be closed, and then the vehicle-mounted charging control module exits.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110618681.8A CN113335098A (en) | 2021-06-03 | 2021-06-03 | Electric vehicle charging architecture compatible with 400V and 800V charging voltages and charging method thereof |
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| CN202110618681.8A CN113335098A (en) | 2021-06-03 | 2021-06-03 | Electric vehicle charging architecture compatible with 400V and 800V charging voltages and charging method thereof |
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| CN114030368A (en) * | 2021-12-16 | 2022-02-11 | 深圳威迈斯新能源股份有限公司 | Electric automobile quick charging system and control method thereof |
| WO2023141838A1 (en) * | 2022-01-26 | 2023-08-03 | 宁德时代新能源科技股份有限公司 | Battery management method and battery management apparatus |
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Application publication date: 20210903 |