CN212063594U - Single-phase vehicle-mounted battery charger for plug-in electric automobile - Google Patents
Single-phase vehicle-mounted battery charger for plug-in electric automobile Download PDFInfo
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- CN212063594U CN212063594U CN202021131834.3U CN202021131834U CN212063594U CN 212063594 U CN212063594 U CN 212063594U CN 202021131834 U CN202021131834 U CN 202021131834U CN 212063594 U CN212063594 U CN 212063594U
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- converter
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- voltage battery
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- capacitor
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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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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- 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
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
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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
- Y02T90/14—Plug-in electric vehicles
Abstract
The utility model discloses a single-phase vehicle-mounted battery charger for a plug-in electric automobile, which comprises a full-bridge AC-DC converter, a double-active bridge DC-DC converter and a double-function circuit; the dual-function circuit has two functions of voltage charging and active power decouplingThe function is realized by switching of an internal switch and sharing of a power tube and a capacitor, and the function and the mode are switched; switch S2In the first state 'a', the charger can work in a grid-connected G2V mode and a vehicle-to-grid V2G mode, and the low-voltage battery charging circuit can be used as an active filter to eliminate low-frequency power supply ripples on a direct-current link and charge a high-voltage battery; and at S2When the state is 'b', the high-voltage to low-voltage H2L mode can be operated, the low-voltage charging circuit can also be used as a decoupling circuit of active power, and the charging of a low-voltage battery is carried out; the vehicle-mounted battery charger of the electric automobile has multiple working modes, is universal in assembly and is low in size and cost.
Description
Technical Field
The utility model belongs to the power electronics technology relates to a single-phase vehicle-mounted battery charger for inserting electric automobile.
Background
Nowadays, electric vehicles are drawing more and more attention from automobile manufacturers, governments and consumers with the emergence of stricter regulations regarding emissions, global warnings and resource restrictions. In plug-in electric vehicles, the battery is typically charged through an on-board battery charger grid. Generally, there are two battery applications in electric vehicles. One is a high voltage battery for the traction motor drive and the other is a low voltage battery for the auxiliary power supply to provide a load for lighting and signaling circuits, entertainment, automotive seating and other electronic equipment and the like.
In a single-phase high-voltage battery charger, the ripple power component inherent in the dc bus may fluctuate at twice the grid frequency, resulting in a dc bus ripple voltage. To smooth out this low frequency ripple power, it is often necessary to use a large capacitor. However, since electrolytic capacitors are not ideal in electric vehicle applications due to their short service life, it is necessary to replace them with reliable film capacitors, the size of which should be optimized.
Disclosure of Invention
Therefore the utility model provides a single-phase vehicle-mounted charger for inserting electric formula electric automobile with difunctional circuit, it not only can work under three kinds of different modes, but also can work under the active power decoupling function. When the charger is operating in either G2V or V2G mode, the low voltage battery charging circuit acts as an active filter to eliminate low frequency ripple power on the dc link. A small film capacitor is used instead of a large electrolytic capacitor on the dc link. The utility model provides a low voltage battery charger with active power function of decoupling can show the size and the cost that reduce single-phase on-vehicle charger.
An object of the utility model is to provide a low pressure and low voltage battery charging circuit's single-phase on-vehicle battery charger with active power decoupling function to reduce single-phase on-vehicle charger's size and cost, in order to overcome prior art's not enough.
The utility model discloses a following technical method realizes above-mentioned purpose:
a single-phase on-vehicle battery charger for inserting electric automobile, including single-phase electric wire netting and filter inductance L thereof1And L2Electric network interface switch S1Full-bridge AC-DC converter, high pressure/low voltage battery interface, two active bridge DC-DC converters still include with the parallel difunctional circuit of full-bridge AC-DC converter output:
comprises two switching tubes Q5And Q6Filter inductor L4Relay switch S2Capacitor C1And C2An output capacitor C0；
Q5And Q6A bridge arm is formed by connecting in series, a filter inductor is connected at the midpoint of the bridge arm and then connected with a relay switch S2The voltage charging and active power decoupling circuit functions are realized via two contacts "a" and "b", respectively.
Further, Q5And Q6A bridge arm is formed by connecting in series, a filter inductor is connected at the midpoint of the bridge arm and then connected with a selection switch S2The functions of low-voltage charging and active power decoupling circuit are respectively realized through two contacts 'a' and 'b', and a relay S2For switching between APD functions and low voltage battery charging:
moving the connection of the low-voltage battery charging circuit to a direct-current link of the high-voltage battery circuit instead of directly connecting to the high-voltage battery, so as to realize an active power decoupling circuit;
the dual active DC-DC converter and the dual function circuit operate as a two-stage DC-DC converter.
Further, the charger has three modes of operation: switch S2In the first state 'a', the charger can work in a grid-connected G2V mode and a vehicle-to-grid V2G mode, the low-voltage battery charging circuit can be used as an active filter to eliminate low-frequency power supply ripples on a direct-current link and charge a high-voltage batteryLine charging; and at S2The state "b" may then be run in the high to low pressure H2L mode.
G2V: charging the electric vehicle from the power grid; V2G: the electric vehicle is connected to the power grid; H2L: high voltage battery circuit to low voltage battery circuit.
Further, the switching principle of the working mode of the vehicle-mounted charger is as follows:
G2V or V2G mode: s1Is closed, S2Connected to point "a". In these modes, the high voltage battery charges or discharges power from the grid back to the grid, and the dual function circuit decouples active power, absorbing ripple power inherent in the single phase system.
H2L mode: s1Is opened and S2Connected to point "b", in which mode, the low-voltage battery is charged from the high-voltage battery by the dual function circuit,
adopt the beneficial effect that above-mentioned technical scheme brought:
the electric vehicle charger with the dual-function circuit can realize the conversion of functions and modes by switching the internal switch and sharing the power tube and the capacitor; switch S2In the first state 'a', the charger can work in a grid-connected G2V mode and a vehicle-to-grid V2G mode, and the low-voltage battery charging circuit can be used as an active filter to eliminate low-frequency power supply ripples on a direct-current link and charge a high-voltage battery; and at S2When the state is 'b', the high-voltage to low-voltage H2L mode can be operated, the low-voltage charging circuit can also be used as a decoupling circuit of active power, and the charging of a low-voltage battery is carried out; the vehicle-mounted battery charger of the electric automobile has multiple working modes, is universal in assembly and is low in size and cost.
Drawings
Fig. 1 is a circuit diagram of a single-phase vehicle-mounted battery charger for a plug-in electric vehicle according to the present invention;
fig. 2 is a circuit diagram of the single-phase vehicle-mounted battery charger for the plug-in electric vehicle according to the present invention operating in G2V and V2G modes;
fig. 3 is a circuit diagram of the single-phase vehicle-mounted battery charger for the plug-in electric vehicle according to the present invention operating at H2L.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 is the utility model discloses a single-phase on-vehicle battery charger for inserting electric automobile, this charger circuit include tertiary formula on-vehicle charger circuit. Wherein the first stage circuit is a full bridge AC-DC converter, the second stage is a dual active bridge DC-DC converter (DAB), and the last stage is a Dual Function Circuit (DFC) for voltage battery charging and active power decoupling.
Specifically, referring to fig. 1, a structure commonly adopted by a single-phase vehicle-mounted battery charger includes a full-bridge AC-DC converter and a dual-active bridge DC-DC converter, an output end of the full-bridge AC-DC converter is connected in parallel with an input end of the dual-active bridge DC-DC converter, the input end of the full-bridge AC-DC converter is used as an AC input end for connecting a single-phase power grid, and an output end of the dual-active bridge DC-DC converter is used for connecting a high-voltage battery interface. When the vehicle-mounted battery charger is connected to the power grid, the input end of the full-bridge AC-DC converter passes through a power grid interface switch S1And is connected with a single-phase power grid. A filter inductor is arranged between the input end of the general full-bridge AC-DC converter and the single-phase power grid, namely L in the figure1、L2。
On this basis, the utility model discloses a realize the G2V, V2G and the H2L function of on-vehicle battery charger to make the charger work under the active power function of decoupling, provided a difunctional circuit on the basis of aforementioned common structure. Wherein, G2V: charging the electric vehicle from the power grid; V2G: the electric vehicle is connected to the power grid; H2L: high voltage battery circuit to low voltage battery circuit.
Referring to fig. 1, on the basis of the full-bridge AC-DC converter and the dual-active bridge DC-DC converter, the present invention further includes a dual-function circuit connected in parallel with the output terminal of the full-bridge AC-DC converter. The dual function circuit includes a switching tube Q5And a switching tube Q6Filter inductor L4Relay switch S2Capacitor C1Capacitor and method for manufacturing the sameDevice C2And an output capacitor C0。
The switch tube Q5And a switching tube Q6Bridge arm and capacitor C formed by series connection1And a capacitor C2And the bridge arms are connected in parallel after being connected in series. Filter inductance L4And relay switch S2After being connected in series, the first contact (namely the contact a) is connected across the switching tube Q5And a switching tube Q6Capacitor C1And a capacitor C2In the meantime. Relay switch S2Is connected in series with the output capacitor C0. Filter inductance L4Relay switch S2And an output capacitor C0After being connected in series with a switching tube Q6And (4) connecting in parallel. The output capacitor C0Both ends are used for connecting the low-voltage battery interface. When the device works, the device can work by being respectively connected with a single-phase power grid, a high-voltage battery and a low-voltage battery.
When the input end of the full-bridge AC-DC converter is connected with a single-phase power grid, the output end of the double-active bridge DC-DC converter is connected with a high-voltage battery and an output capacitor C0With both ends connected to a low-voltage battery (i.e. S)1Connected, high-low voltage battery is normally connected to the charger), and a relay switch S2Communicate with the first contact (i.e. S)2Connected to contact a), the high voltage battery charges or discharges power from the grid back to the grid, and the dual function circuit decouples active power and absorbs ripple power inherent in the single phase system.
When the input end of the full-bridge AC-DC converter is disconnected with the single-phase power grid, the output end of the double-active bridge DC-DC converter is connected with the high-voltage battery and the output capacitor C0With both ends connected to a low-voltage battery (i.e. S)1Disconnected, high-low voltage battery normally connected to charger), and relay switch S2When the second contact is connected (i.e. S)2Connected to contact b) and the low voltage battery is charged from the high voltage battery by the dual function circuit.
Fig. 2 is a circuit diagram of the single-phase vehicle-mounted battery charger for the plug-in electric vehicle according to the present invention operating in G2V and V2G modes. For G2V or V2G modes, S1Is closed, S2Connected to point "a". In these modes, the high-voltage battery is charged or discharged from the gridThe power returns to the grid where the dual function circuit acts as an active power decoupling circuit, absorbing the ripple power inherent in the single phase system. For H2L mode, S1Is opened and S2Connected to point "b". In this operation, the low-voltage battery is charged from the high-voltage battery by a dual-function circuit, in which two identical capacitors (C)1And C2) Is an output filter of a dual active bi-directional DC-DC converter. To implement the active power decoupling function, the connection of the low voltage charger is moved to the dc link of the high voltage battery charging circuit, rather than being directly connected to the high voltage battery. For low voltage battery chargers, the dual active DC-DC converter and the dual function circuit operate as a two-stage DC-DC converter. Relay S2For switching between an active power decoupling function and low voltage battery charging.
Fig. 3 is a circuit diagram of the single-phase vehicle-mounted battery charger for the plug-in electric vehicle according to the present invention operating at H2L. When S is1When disconnected, the vehicle is disconnected from the grid, and S2Then to terminal "b" and the system can then be used as a two-stage DC-DC converter to charge the low voltage battery.
Claims (4)
1. A single-phase vehicle-mounted battery charger for a plug-in electric automobile comprises a full-bridge AC-DC converter and a double-active bridge DC-DC converter, wherein the output end of the full-bridge AC-DC converter is connected with the input end of the double-active bridge DC-DC converter in parallel, the input end of the full-bridge AC-DC converter is used for connecting a single-phase power grid, and the output end of the double-active bridge DC-DC converter is used for connecting a high-voltage battery interface; it is characterized by also comprising:
the dual-function circuit is connected with the output end of the full-bridge AC-DC converter in parallel and comprises a switching tube Q5And a switching tube Q6Filter inductor L4Relay switch S2Capacitor C1Capacitor C2And an output capacitor C0(ii) a The switch tube Q5And a switching tube Q6Bridge arm and capacitor C formed by series connection1And a capacitor C2After being connected in series, the bridge arm is connected in parallel; filter inductance L4And relay switch S2After being connected in series, the first contact is bridged on the switching tube Q5And a switching tube Q6Capacitor C1And a capacitor C2To (c) to (d); relay switch S2Second contact of the first contact is connected in series with an output capacitor C0Filter inductance L4Relay switch S2And an output capacitor C0After being connected in series with a switching tube Q6Parallel connection; the output capacitor C0Both ends are used for connecting the low-voltage battery interface.
2. The charger of claim 1, wherein when the input terminal of the full-bridge AC-DC converter is connected to a single-phase power grid, the output terminal of the dual-active bridge DC-DC converter is connected to the high-voltage battery, and the output capacitor C0A low-voltage battery connected at both ends, and a relay switch S2When the first contact is communicated, the high-voltage battery charges or releases power from the power grid to return to the power grid, and the dual-function circuit performs active power decoupling and absorbs ripple power inherent in a single-phase system.
3. The charger of claim 1, wherein the output terminal of the dual active bridge DC-DC converter is connected to the high voltage battery and the output capacitor C when the input terminal of the full bridge AC-DC converter is disconnected from the single phase grid0A low-voltage battery connected at both ends, and a relay switch S2When the second contact is connected, the low-voltage battery is charged from the high-voltage battery by the dual-function circuit.
4. Charger as claimed in claim 1, characterized in that the input of the full bridge AC-DC converter is connected via a grid interface switch S1And a filter inductor is arranged between the input end of the full-bridge AC-DC converter and the single-phase power grid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021131834.3U CN212063594U (en) | 2020-06-18 | 2020-06-18 | Single-phase vehicle-mounted battery charger for plug-in electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021131834.3U CN212063594U (en) | 2020-06-18 | 2020-06-18 | Single-phase vehicle-mounted battery charger for plug-in electric automobile |
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| Publication Number | Publication Date |
|---|---|
| CN212063594U true CN212063594U (en) | 2020-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021131834.3U Expired - Fee Related CN212063594U (en) | 2020-06-18 | 2020-06-18 | Single-phase vehicle-mounted battery charger for plug-in electric automobile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113147447A (en) * | 2021-03-17 | 2021-07-23 | 北京动力源科技股份有限公司 | Multifunctional vehicle-mounted charging circuit for electric automobile |
-
2020
- 2020-06-18 CN CN202021131834.3U patent/CN212063594U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113147447A (en) * | 2021-03-17 | 2021-07-23 | 北京动力源科技股份有限公司 | Multifunctional vehicle-mounted charging circuit for electric automobile |
| CN113147447B (en) * | 2021-03-17 | 2022-08-16 | 北京动力源科技股份有限公司 | Multifunctional vehicle-mounted charging circuit for electric automobile |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201201 Termination date: 20210618 |
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| CF01 | Termination of patent right due to non-payment of annual fee |