CN214355557U - Electric automobile fills circuit soon - Google Patents
Electric automobile fills circuit soon Download PDFInfo
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- CN214355557U CN214355557U CN202022918068.1U CN202022918068U CN214355557U CN 214355557 U CN214355557 U CN 214355557U CN 202022918068 U CN202022918068 U CN 202022918068U CN 214355557 U CN214355557 U CN 214355557U
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- charging pile
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- 238000000034 method Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 9
- 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 2
- 230000007547 defect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 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
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- 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
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- 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
- Y02T90/12—Electric charging stations
-
- 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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a quick charging circuit of an electric automobile, which comprises a change-over switch, a direct charging branch, a vehicle-mounted charger branch and a battery pack, wherein the change-over switch is connected with an external charging pile, and the direct charging branch or the vehicle-mounted charger branch is selected to charge the battery pack; the control method specifically comprises the following steps: firstly, connecting a charging pile with a direct charging branch, and charging a battery pack through the direct charging branch; then disconnecting the direct charging branch, connecting the charging pile with a vehicle-mounted charger branch, and charging the battery pack through the vehicle-mounted charger branch; the utility model adds a small number of devices on the basis of the design of the conventional charger, and utilizes the method that the vehicle-mounted charger is full of the residual electric quantity, so that a user does not need to manually switch the slow charging pile, and the whole vehicle does not need to be added with boosting parts; has the advantages of simple and practical operation, simple circuit structure and low cost.
Description
Technical Field
The utility model relates to an electric automobile field especially relates to an utilize current module to carry out the distribution, upgrade conventional design with less cost, make the circuit that electric automobile is full of fast.
Background
The maximum output voltage of the quick-charging pile in the current market is 750V, and the full power of a power battery of a large-sized electric automobile such as a bus and a public bus is 785V. The two strategies of domestic and foreign chargers are that firstly, after the battery is charged to 750V, the battery is not charged. Secondly, a boosting module is added in the quick charge loop to boost the voltage to 800V or above, and the short part of the electric quantity is fully charged. As shown in the figure, the schematic diagram of charging a new energy vehicle by a charging pile at home and abroad at present, when the vehicle is slowly charged, Alternating Current (AC) generated by the charging pile is processed into direct current (HV) by a charging module to charge a power battery. When the quick charging is carried out, the charging pile generates direct current (HV) to directly charge the power battery, and a boosting module is added on part of products to ensure that the power battery can be fully charged when the quick charging is carried out.
The two schemes have the defects that the first scheme affects customer experience, the second scheme is high in cost, weight and space occupation are increased, and the effect is only to fill 36V electricity, so that most manufacturers select the first scheme without processing.
Therefore, how to design a charging circuit with fast charging, simple operation, simple structure and low cost is an urgent technical problem to be solved in the industry.
SUMMERY OF THE UTILITY MODEL
In order to solve the above-mentioned defect that exists among the prior art, the utility model provides an electric automobile fills circuit soon.
The technical scheme of the utility model design an electric automobile fills circuit soon, it includes change over switch, directly fills branch road, on-vehicle machine branch road, the battery package of charging, change over switch connects and fills electric pile in the outside, selects to charge to the battery package with directly filling branch road or on-vehicle machine branch road that charges.
The direct charging branch is a direct current bus.
The vehicle-mounted charger branch adopts one of Vienna, a totem pole, a bridge PFC and a bridgeless PFC.
The charging pile can be a direct-current charging pile, and the direct-current charging branch or the vehicle-mounted charger branch can be switched on by the change-over switch. When the branch of the vehicle-mounted charger adopts a PFC module with two bridge arms, the output positive pole of the direct current charging pile is connected with the middle point of one bridge arm in the PFC module, and the output negative pole of the direct current charging pile is connected with the middle point of the rest bridge arm in the PFC module; when the branch of the vehicle-mounted charger adopts a PFC module with three bridge arms, the output positive pole of the direct current charging pile is connected with the middle points of two bridge arms in the PFC module, and the output negative pole of the direct current charging pile is connected with the middle point of the rest bridge arm in the PFC module.
The charging pile can also be an alternating current charging pile, and the switch only gates the branch of the vehicle-mounted charger.
The utility model provides a technical scheme's beneficial effect is:
the utility model adds a small number of devices on the basis of the design of the conventional charger, and utilizes the method that the vehicle-mounted charger is full of the residual electric quantity, so that a user does not need to manually switch the slow charging pile, and the whole vehicle does not need to be added with boosting parts; has the advantages of simple and practical operation, simple circuit structure and low cost.
Drawings
The invention is explained in more detail below with reference to exemplary embodiments and the accompanying drawings, in which:
FIG. 1 is a prior art circuit diagram;
FIG. 2 is a schematic block diagram of a preferred embodiment of the present invention;
FIG. 3 is a three-phase AC voltage waveform diagram;
fig. 4 is a schematic view of the current trend when a branch of the vehicle-mounted charger adopts three bridge arms of the PFC module AC input;
fig. 5 is a schematic diagram of the current trend when a branch of the vehicle-mounted charger adopts three bridge arms for the direct current input of the PFC module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
To the background art the bottleneck, the utility model discloses under the prerequisite of increasing the cost as far as possible, increase change over switch, utilize original on-vehicle machine that charges to step up, realize the purpose that fills power battery fully.
The utility model discloses an electric automobile fills circuit soon, refer to the functional block diagram that fig. 2 demonstrates, it includes change over switch, directly fills branch road, on-vehicle machine branch road, the battery package that charges, change over switch connects and fills electric pile in the outside, selects to charge to the battery package with directly filling branch road or on-vehicle machine branch road that charges. In a preferred embodiment, the direct charging branch is a direct current bus.
The technical scheme in fig. 2 is to remove the boosting device in fig. 1 and change the boosting device into a direct charging branch.
When the charging is carried out, the charging pile is connected with the direct charging branch, the battery pack is charged quickly through the direct charging branch, the direct charging branch is disconnected when the battery pack is nearly fully charged, the charging pile is connected with the vehicle-mounted charger branch, the battery pack is charged slowly through the vehicle-mounted charger branch, and the vehicle-mounted charger branch can increase the voltage to charge the residual capacity until the battery pack is fully charged.
The vehicle-mounted charger branch circuit can adopt one of topologies including but not limited to Vienna, totem pole, bridge PFC and bridgeless PFC. As long as the switching power supply topology that can be input by HV can be applied to this utility model, not limited to the three-phase circuit exemplified in this application.
In a preferred embodiment, the charging pile is a direct current charging pile, and the switch can switch on the direct charging branch or the vehicle-mounted charger branch.
When the voltage of the battery pack is low, the direct charging branch is gated by the change-over switch, and the charging pile directly charges the battery pack through HV 200V-750.
When the voltage of the battery pack is 750V, the voltage is 35V away from the full-charge voltage 785V of the battery, the change-over switch is controlled to switch the line of the charging pile to the vehicle-mounted charger, and the vehicle-mounted charger raises the quick-charge voltage 750V to 800V to charge the battery.
Depending on the capacity of a conventional battery, a 35V voltage is charged at about 3.5 degrees (KWh).
If the vehicle carries a 22KW vehicle-mounted charger. When the battery is charged for 3.5 degrees, the power consumption is as follows:
。
if the vehicle carries a 44KW vehicle-mounted charger. When the battery is charged for 3.5 degrees, the power consumption is as follows:
。
the battery pack can be fully charged by increasing the original charging time by 5-10 min, and the cost is only one pair of high-voltage relays and corresponding power distribution copper bars, which is far more cost-effective than the installation of one set of boosting equipment. And one set of equipment is reduced, namely, one failure risk point is reduced, and the reliability of the whole vehicle is improved.
In one embodiment that the charging pile is a direct-current charging pile, the branch of the vehicle-mounted charger adopts a PFC module with two bridge arms; the output positive pole of the direct current charging pile is connected with the middle point of one bridge arm in the PFC module, and the output negative pole of the direct current charging pile is connected with the middle point of the rest bridge arm in the PFC module.
In another embodiment (see fig. 4 and 5) in which the charging pile is a direct current charging pile, the branch of the vehicle-mounted charger adopts a PFC module with three legs; the output positive pole of the direct current charging pile is connected with the middle points of two bridge arms in the PFC module, and the output negative pole of the direct current charging pile is connected with the middle point of the rest one bridge arm in the PFC module.
Feasibility analysis of the AC port input HV voltage:
the charging module needs to be rectified to work after AC input, and can be input by HV theoretically.
Taking the example of a three-phase AC input, as shown in fig. 3, is a three-phase voltage waveform. Fig. 4 is a schematic circuit diagram of a circuit in which L2 and L3 currents flow in and L1 current flows out when a branch of the vehicle-mounted charger adopts PFC modules of three bridge arms. Fig. 5 is a schematic circuit diagram of a circuit in which L1 and L2 currents flow in and L3 current flows out when a branch of a vehicle-mounted charger adopts three-leg PFC modules.
When three-phase input is performed, three pipes work alternately, as shown in fig. 4, a charger branch adopts three-arm PFC modules, input current is an AC current trend, at this time, when the three-phase input is at a point a in fig. 3, the three-phase input is in a state where L1 and L2 current flow in and L3 current flows out (dotted arrows), and the next state is a point B, L2 flows in and L1 and L3 flow out (solid line head drop). Fig. 5 is a schematic diagram of the current trend when a branch of the vehicle-mounted charger adopts three bridge arms for direct current input of the PFC module.
The alternating cycles form a DC voltage across the capacitor, which is used as the post-stage DCDC input. And the DCDC is boosted to charge the power battery.
For improving the utility model discloses a compatibility works as when filling electric pile for alternating-current charging stake, change over switch only gates on the on-vehicle branch road that charges.
In a preferred embodiment, the switch is a high voltage relay.
When in quick charging, the charging pile is connected with the direct charging branch, and the battery pack is charged through the direct charging branch; and then disconnecting the direct charging branch, connecting the charging pile with the vehicle-mounted charger branch, and charging the battery pack through the vehicle-mounted charger branch.
The direct charging branch is used for charging the battery pack, when the voltage of the battery pack reaches 750V, the direct charging branch is disconnected again, the vehicle-mounted charger branch is used for charging the battery pack, and when the voltage of the battery pack reaches 800V, the charging is finished.
The foregoing examples are illustrative only and are not intended to be limiting. Any equivalent modifications or variations without departing from the spirit and scope of the present application should be included in the claims of the present application.
Claims (7)
1. The quick charging circuit of the electric automobile is characterized by comprising a change-over switch, a direct charging branch, a vehicle-mounted charger branch and a battery pack, wherein the change-over switch is connected with an external charging pile, and the direct charging branch or the vehicle-mounted charger branch is selected for charging the battery pack.
2. The electric vehicle quick charging circuit as claimed in claim 1, wherein the direct charging branch is a direct current bus.
3. The electric vehicle quick-charging circuit according to claim 1, wherein the vehicle-mounted charger branch adopts one of Vienna, totem pole, bridge PFC and bridgeless PFC.
4. The electric vehicle quick charging circuit as claimed in any one of claims 1 to 3, wherein the charging pile is a DC charging pile, and a switch can switch on the DC charging branch or the vehicle-mounted charger branch.
5. The electric vehicle quick-charging circuit according to claim 4, wherein the vehicle-mounted charger branch adopts a PFC module with two bridge arms; the output positive pole of the direct current charging pile is connected with the middle point of one bridge arm in the PFC module, and the output negative pole of the direct current charging pile is connected with the middle point of the rest bridge arm in the PFC module.
6. The electric vehicle quick-charging circuit according to claim 4, wherein the vehicle-mounted charger branch employs a PFC module having three bridge arms; the output positive pole of the direct current charging pile is connected with the middle points of two bridge arms in the PFC module, and the output negative pole of the direct current charging pile is connected with the middle point of the rest one bridge arm in the PFC module.
7. The electric vehicle quick charging circuit as claimed in any one of claims 1 to 3, wherein the charging pile is an AC charging pile, and the selector switch only gates the branch of the vehicle-mounted charger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022918068.1U CN214355557U (en) | 2020-12-08 | 2020-12-08 | Electric automobile fills circuit soon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022918068.1U CN214355557U (en) | 2020-12-08 | 2020-12-08 | Electric automobile fills circuit soon |
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| Publication Number | Publication Date |
|---|---|
| CN214355557U true CN214355557U (en) | 2021-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022918068.1U Active CN214355557U (en) | 2020-12-08 | 2020-12-08 | Electric automobile fills circuit soon |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115891660A (en) * | 2023-03-10 | 2023-04-04 | 宁德时代新能源科技股份有限公司 | Battery replacement connector detection method, device, circuit, electronic equipment and storage medium |
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2020
- 2020-12-08 CN CN202022918068.1U patent/CN214355557U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115891660A (en) * | 2023-03-10 | 2023-04-04 | 宁德时代新能源科技股份有限公司 | Battery replacement connector detection method, device, circuit, electronic equipment and storage medium |
| CN115891660B (en) * | 2023-03-10 | 2023-12-26 | 宁德时代新能源科技股份有限公司 | Method, device, circuit, electronic equipment and storage medium for detecting replacement connector |
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Address after: 518000 Fengyun Science and Technology Building, No. 5 Industrial Zone, North Ring Road, Nanshan District, Shenzhen City, Guangdong Province, 501 Patentee after: Shenzhen Weimeisi New Energy (Group) Co.,Ltd. Country or region after: China Address before: 518000, 5 floor, Fengyun mansion, five road north, Nanshan District science and Technology Park, Shenzhen, Guangdong Patentee before: Shenzhen Vmax Power Co.,Ltd. Country or region before: China |