WO2011003317A1

WO2011003317A1 - Electric vehicle charge system

Info

Publication number: WO2011003317A1
Application number: PCT/CN2010/073676
Authority: WO
Inventors: 冯勇
Original assignee: 芜湖普威技研有限公司
Priority date: 2009-07-10
Filing date: 2010-06-08
Publication date: 2011-01-13
Also published as: CN101599654A; CN101599654B

Abstract

An electric vehicle charge system includes a vehicular socket one end of which is connected to an input end of an intelligent current identifying circuit (30). The intelligent current identifying circuit (30) is divided into two branches to provide output. One of the branches is directly connected to an input end of a battery pack (10), and the other branch is connected to the input end of the battery pack (10) through a vehicular rectifier (20). The intelligent current identifying circuit (30) can identify the external impressed current automatically. If the external impressed current is a direct current (DC) power supply, the battery pack (10) is directly charged. If the external impressed current is an alternating current (AC) power supply, the battery pack (10) is charged through the vehicular rectifier (20). The electric vehicle charge system integrates the AC commercial power supply slow charge mode and the charge station DC quick charge mode, enables easy connection of the vehicular socket and an externally-connected power supply plug, and is simple in structure and convenient during application.

Description

Electric vehicle charging system

The invention relates to the field of automotive electronic control, in particular to an electric vehicle charging system. Background technique

With the development of battery technology, motor technology and large-scale integrated circuit technology, electric vehicles have entered people's lives, and designing a simple vehicle battery charging system has been broken. There are two ways to charge electric vehicles. One is household 220V AC slow charging. After AC is rectified and converted to DC, it is connected to the battery for charging. It takes about 8 hours to charge. The other is dedicated DC charging station. The current direct current is directly connected to the battery for charging, and can be charged 80% in 15 minutes. Figure 1 shows the current charging method, AC slow charging mode connection method: car battery jack 1 - car rectifier plug 2 - car rectifier jack 3 - household 220V AC plug 5, four high voltage line connection; DC fast charge mode connection method: Car battery jack 1 - fast charging station DC plug 4, connected by high voltage line. When charging, depending on the charging method, the user has to connect the line himself. This charging mode is complicated to operate and the user is inconvenient to use. Summary of the invention

The object of the present invention is to provide an electric vehicle charging system capable of integrating an AC mains slow charging method with a charging station DC fast charging method, automatically identifying a charging type, and having a simple structure and convenient use.

To achieve the above object, an electric vehicle charging system provided by the present invention includes a vehicle socket, and one end of the vehicle socket is connected to an input end of an intelligent current recognition circuit, and the intelligent current identification circuit is divided into two outputs, and one channel is directly connected to the battery. The input of the group, the other way is connected to the input of the battery pack via the vehicle rectifier.

The invention automatically sets the external current by setting the intelligent current identification circuit. If the external power source is externally connected, the battery pack is directly charged; if the external AC power source is connected, the battery pack is charged by the vehicle rectifier. The invention integrates the AC mains slow charging mode and the charging station DC fast charging mode, and the user only needs to connect the car socket with the external power plug, and the structure is simple and convenient to use. DRAWINGS

Figure 1 is a schematic view of the structure of the prior art; Figure 2 is a schematic view of the structure of the present invention;

3 is a schematic structural view of a vehicle socket in the present invention;

4 is a schematic structural view of a DC charging plug of a fast charging station in the present invention;

Figure 5 is a schematic structural view of a household 220V AC plug according to the present invention;

Figure 6 is a circuit diagram of the present invention. detailed description

An electric vehicle charging system includes a vehicle socket, one end of the vehicle socket is connected to an input end of the intelligent current identification circuit 30, and the intelligent current identification circuit 30 is divided into two outputs, one directly connected to the input end of the battery pack 10, and the other All the way through the vehicle rectifier 20 is connected to the input end of the battery pack 10, the vehicle socket is disposed on the outer surface of the vehicle body, and the jack 40 opened on the vehicle socket is respectively connected with the DC charging plug 50 of the fast charging station and the 220V AC plug of the household. 60 match, as shown in Figure 2.

Referring to FIG. 6, the smart current identification circuit 30 includes first and second contacts 31 and 32. One ends of the first and second contacts 31 and 32 are respectively connected to the vehicle power supply, and the first and second contacts 31 and 32 are respectively connected. One end is connected to the resistors R1 and R3 respectively, and the other end of the resistor R1 is connected to the input end of the filter circuit composed of the resistor R2 and the capacitor C1. The output end of the filter circuit is connected between the base and the emitter of the transistor Q1. The other end of R3 is connected to the input end of the filter circuit composed of the resistor R4 and the capacitor C2. The output end of the filter circuit is connected between the base and the emitter of the transistor Q2, and the collectors of the transistors Q1 and Q2 are respectively connected to the relay Kl. One end of the coil of Κ2, the other end of the coil of relay Kl, Κ2 is connected to the vehicle power supply, one end of the contact of the relay K1 is connected to the direct current through the vehicle socket, and the other end of the contact of the relay K1 is connected with the battery pack; the contact of the relay Κ2 One end of the point is connected to the alternating current through the vehicle socket, and the other end of the contact of the relay Κ2 is connected to the battery pack through the vehicle rectifier. The relays K1 and Κ2 are normally open before being energized, and the vehicle power supply is a +12V DC power supply.

The first contact 31 described in connection with FIGS. 3, 4, 5, 6 is composed of two first and second metal sheets 31a, 31b having the same shape and size, and the second contact 32 is completely shaped by two shapes and sizes. The same third and fourth metal sheets 32a, 32b are formed, and the first and second metal sheets 31a, 31b and the third and fourth metal sheets 32a, 32b are respectively arranged at a convex interval on the vehicle socket, and the four metal sheets are Conductive metal sheet. The fast charging station DC plug 50 is provided with a conductive metal sheet 51. The conductive metal sheet 51 is provided with a concave portion matching the shape of the first and second metal sheets 31a, 31b, and the conductive metal sheet 51 is used for the first and second portions. The metal sheets 31a, 31b are short-circuited to connect the first contact 31 to the vehicle power supply; the household 220V AC plug 60 is provided with a conductive metal sheet 61, and the conductive metal sheet 61 is disposed on the third and fourth metal sheets 32a, 32b. a concave portion in conformity with the shape, the conductive metal piece 61 is used to be the third, The four metal pieces 32a, 32b are shorted, and the second contact 32 is turned on.

The present invention will be further described below in conjunction with Figs. 2, 3, 4, 5, and 6.

When the electric vehicle is quickly charged at the charging station, the quick charging station DC plug 50 is inserted into the vehicle socket, the first and second metal sheets 31a, 31b on the vehicle socket and the conductive metal sheet on the socket of the fast charging station DC plug 50 are located. 51 phase fit, the first contact 31 is turned on, the vehicle current flows through the resistor R1 and is connected to the filter circuit composed of the resistor R2 and the capacitor C1, and then the transistor Q1 is turned on, the relay K1 is energized, and the fast charging station is connected to the battery pack. 10 Charging; Conversely, when the electric car is fast charging at home, plug the household 220V AC plug 60 into the car socket, the third and fourth metal plates 32a, 32b on the car socket and the 220V AC plug 60 on the socket of the household. The conductive metal piece 61 is attached, the second contact 32 is turned on, the vehicle current flows through the resistor R3 and is connected to the filter circuit composed of the resistor R4 and the capacitor C2, and then is turned on via the transistor Q2, and the relay K2 is energized and attracted, and the household 220V The alternating current is charged to the battery pack 10 via the on-board rectifier 20.

In summary, the core of the present invention is to automatically identify the external current by setting the smart current identification circuit 30. If the external power supply is externally connected, the battery pack is directly charged; if the external AC power supply is used, the battery pack is passed through the vehicle rectifier 20 10 charging. The invention integrates the AC mains slow charging mode and the charging station DC fast charging mode, and the user only needs to connect the car socket with the external power plug, and the structure is simple and convenient to use.

It should be noted that the above embodiments are only intended to illustrate the invention and are not to be construed as limiting the scope of the invention. The spirit and scope of the invention are intended to be included within the scope of the appended claims.

Claims

Claim

1. An electric vehicle charging system, comprising a vehicle socket, characterized in that: one end of the vehicle socket is connected to an input end of an intelligent current identification circuit (30), and the intelligent current identification circuit (30) is divided into two outputs, one way Directly connected to the input of the battery pack (10), and the other via the on-board rectifier (20) to the input of the battery pack (10)

2. The electric vehicle charging system according to claim 1, wherein: said intelligent current identifying circuit (30) comprises first and second contacts (31, 32), first and second contacts (31, One end of the 32) is respectively connected to the vehicle power supply, and the other ends of the first and second contacts (31, 32) are respectively connected to the first and second resistors (R1, R3), and the other end of the first resistor (R1) is connected to the resistor ( R2), the input end of the filter circuit composed of a capacitor (C1), the output end of the filter circuit is connected between the base and the emitter of the first transistor (Q1), and the other end of the second resistor (R3) An input end of a filter circuit composed of a resistor (R4) and a capacitor (C2), the output end of the filter circuit is connected between the base and the emitter of the second transistor (Q2), the first and second transistors The collectors of (Ql, Q2) are respectively connected to one ends of the first and second relays (K1, Κ2), and the other ends of the first and second relays (Kl, Κ2) are connected to the vehicle power supply, and the first relay (K1) One end of the contact is connected to the DC through the car socket Electric, the other end of the contact of the first relay (K1) is connected to the battery pack; one end of the contact of the second relay (Κ2) is connected to the alternating current through the vehicle socket, and the other end of the contact of the second relay (Κ2) is passed through the vehicle. The rectifier is connected to the battery pack.

3. The electric vehicle charging system according to claim 1, wherein: the jack (40) opened in the vehicle socket is respectively associated with a quick charging station DC plug (50) and a household 220V AC plug (60). Cooperate.

4. The electric vehicle charging system according to claim 1, wherein: said vehicle socket is disposed on an outer surface of the vehicle body.

5. The electric vehicle charging system according to claim 2, wherein: said first contact (31) is composed of two first and second metal sheets (31a, 31b) having the same shape and size. The second contact (32) is composed of two third and fourth metal sheets (32a, 32b) of identical shape and size, first and second metal sheets (31a, 31b) and third and fourth metal sheets (32a, 32b) They are respectively arranged on the vehicle socket in a convex interval, and the four metal pieces are all conductive metal sheets.

The electric vehicle charging system according to claim 3 or 5, wherein: the fast charging station DC plug (50) is provided with a conductive metal piece (51), and the conductive metal piece (51) is disposed on the first a recess in which the shapes of the first and second metal sheets (31a, 31b) match; the guide is provided on the household 220V AC plug (60) The electric metal piece (61) and the conductive metal piece (61) are provided with recesses matching the shapes of the third and fourth metal pieces (32a, 32b).

7. The electric vehicle charging system according to claim 2, wherein: said vehicle power source is a +12V DC power source.