Unlock instant, AI-driven research and patent intelligence for your innovation.

Charging circuit of electric automobile and electric automobile

A charging circuit, electric vehicle technology, applied in the field of circuits, can solve problems such as high-voltage electric shock

Active Publication Date: 2022-03-29
SAIC MOTOR
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When not charging, K3 is disconnected, but V- is still approximately 1 / 2Vr, because Vr is generally above 300V, and 1 / 2Vr>60V, therefore, there will be a risk of high voltage electric shock

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Charging circuit of electric automobile and electric automobile
  • Charging circuit of electric automobile and electric automobile
  • Charging circuit of electric automobile and electric automobile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1 of the present application provides a charging circuit for an electric vehicle, which will be described in detail below with reference to the accompanying drawings.

[0041] see image 3 , which is a schematic diagram of a charging circuit provided in an embodiment of the present application.

[0042] The charging circuit is applied to a charging interface, and the charging circuit includes: a first adjustable impedance circuit 301, a second adjustable impedance circuit 301, a high voltage relay and a controller (not shown in the figure).

[0043]The first adjustable impedance circuit 301 is connected in series with the second adjustable impedance circuit 302; the first end of the first adjustable impedance circuit 301 and the second impedance circuit 302 connected in series are used to connect the positive pole of the power battery B; The second end of the first adjustable impedance circuit 301 and the second impedance circuit 302 connected in series is u...

Embodiment 2

[0047] see Figure 4 , which is a schematic diagram of another charging circuit provided in the embodiment of the present application.

[0048] The first adjustable impedance circuit includes a first resistor R1, a third resistor R3, a fifth resistor R5 and a first switch K1; the second adjustable impedance circuit includes a second resistor R2, a fourth resistor R4, a sixth resistor Resistor R6 and second switch K2; wherein, the resistance values ​​of the third resistance R3 and the fourth resistance R4 are the same, and the resistance values ​​of the fifth resistance R5 and the sixth resistance R6 are the same; the first Resistance values ​​of the resistor R1 and the second resistor R2 are variable.

[0049] The third resistor R3 connected in series is connected in parallel with the first switch K1 , the first resistor R1 and the fifth resistor R5 ; the fourth resistor R4 connected in series is connected in parallel with the second switch K2 , the second resistor R2 and the...

Embodiment 3

[0061] Embodiment 3 of the present application provides an electric vehicle, including the charging circuit introduced in the above embodiments.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a charging circuit of an electric automobile and the electric automobile. The charging circuit comprises a first impedance adjustable circuit, a second impedance adjustable circuit, a high-voltage relay and a controller. The first ends of the first impedance adjustable circuit and the second impedance circuit which are connected in series are connected with the first end of a switch of the high-voltage relay, and the second end of the switch of the high-voltage relay is connected with a direct-current positive interface; the second ends of the first impedance adjustable circuit and the second impedance circuit which are connected in series are used for connecting a direct current negative interface; the common end of the first impedance adjustable circuit and the second impedance circuit which are connected in series is used for being connected with a direct-current ground interface; and the controller is used for adjusting the impedance proportion of the first impedance adjustable circuit and the second impedance adjustable circuit when the switch of the high-voltage relay is switched off, so that the voltage between the direct-current negative interface and the direct-current ground interface is lower than a preset threshold value, and the risk of high-voltage electric shock can be avoided on the basis of not adding additional components.

Description

technical field [0001] The present application relates to the field of circuit technology, in particular to a charging circuit for an electric vehicle and the electric vehicle. Background technique [0002] In order to ensure that electric vehicles will not have the risk of high-voltage electric shock when they are not charging, the standard regulations of electric vehicles require that the charging port is prohibited from carrying high-voltage electricity when it is not charging, for example, it is prohibited to carry voltages greater than 60V. [0003] see figure 1 , which is a schematic diagram of a charging circuit. [0004] Wherein, R7, R8, R3, R4, K1, K2 are insulation monitoring circuit components, wherein, R7=R8, R3=R4, R5≈R6. Therefore, after the switch K3 of the high-voltage electric relay is closed, it starts to charge the power battery B. The voltage Vb between DC+ and DC- is the real-time voltage Vr of the power battery B, and the voltage between DC+ and groun...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00B60L53/00
CPCH02J7/0029H02J7/0032H02J7/00308B60L53/00B60L53/16B60L53/11B60L3/00Y02T10/70Y02T10/7072B60L53/10Y02T90/14
Inventor 王祖声陈彦雷杜培军石泉胡菁杨东徽王寰陈玉静
Owner SAIC MOTOR