Relay control circuit of hybrid vehicle

A relay control and main relay technology, applied in relays, circuits, electrical components, etc., can solve the problems of secondary injury to drivers and passengers, contact sintering, and imperfect hybrid vehicles, so as to reduce potential safety hazards and prevent secondary damage. damage effect

Active Publication Date: 2009-10-14
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A hybrid vehicle is equipped with a large-capacity battery as an energy source, and a high-voltage relay is installed between the battery and the load. The driver selects the power source as the internal combustion engine or the battery by controlling the on/off of the relay. It can be said that the relay is connected to the low-voltage control system. As a bridge between the electric circuit and the high-voltage power circuit, the current passing through the relay is sometimes as high as several hundred amperes. In such a

Method used

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  • Relay control circuit of hybrid vehicle
  • Relay control circuit of hybrid vehicle
  • Relay control circuit of hybrid vehicle

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] Example 1:

[0021] Such as figure 1 As shown, the relay control circuit of this embodiment includes a power supply 1, an output terminal of a main relay 2, and a load 3 connected in series in sequence. The input terminal of the main relay 2 is connected with a switch 4 that can control the pull-in of the main relay 2, and the main relay 2 The output terminal is connected in parallel with a pre-charging circuit. The pre-charging circuit is formed by connecting a pre-charging relay 5 and a current-limiting resistor 6 in series. The pre-charging relay 5 is connected with a switch 11 that controls the pre-charging relay 5 to close. The output terminal of the relay 2 is connected with a charging capacitor 7 in series, and the charging capacitor 7 is connected in parallel with the load 3; the input terminal of the main relay 2 is also connected with a protection circuit 8 that can control the main relay 2 to be disconnected in the event of an automobile collision.

[0022] The ...

Example Embodiment

[0027] Example 2:

[0028] The difference from Embodiment 1 is that the relay control circuit of this embodiment also includes a secondary relay 2'whose output terminal is connected in series with the output terminal of the main relay 2 and the parallel circuit composed of the pre-charging circuit. Between the loads 3, the input terminal of the secondary relay 2'is connected with a switch 4'that can control the pull-in of the secondary relay 2'and a protection circuit 8'that can control the secondary relay 2'to disconnect when a car crashes.

[0029] The protection circuit 8'is composed of a switch 9'connected in series with the input end loop of the main relay 2'and a collision sensor 10' that can control the switch 9'to be turned off when the vehicle collides.

Example Embodiment

[0030] Example 3:

[0031] The difference from Embodiment 2 is that the protection circuit 8 in the relay control circuit of this embodiment is a collision sensor 10 that is connected to the switch 4 and can control the switch 4 to be disconnected when the car collides; the protection circuit 8'is a The switch 4'is connected to the collision sensor 10' which can control the switch 4'to disconnect when the car collides. The collision sensors 10, 10' are equivalent to a normally closed switch, which will only be disconnected when the car is in a collision.

[0032] Compared with Embodiment 2, this embodiment can effectively save costs.

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PUM

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Abstract

The invention provides a relay control circuit which can avoid arc discharge of relays and timely disconnect high tension loops when vehicles collide. The control circuit comprises a power supply (1), an output end of a main relay (2) and a load (3); wherein, the components are sequentially connected in series; an input end of the main relay (2) is connected with a switch (4) capable of controlling pull-in of the main relay (2). The key lies in that the output end of the main relay (2) is connected with a precharging circuit in parallel; the precharging circuit is formed by series connection of a precharging relay (5) and current-limiting resistance (6); the precharging relay (5) is connected with a switch (11) which controls pull-in of the precharging relay (5); the output end of the main relay (2) is connected with a charging capacitor (7) in series; the charging capacitor (7) is connected with the load (3) in parallel; the input end of the main relay (2) is also connected with a protective circuit (8) which can control the disconnection of the main relay (2) when vehicles collide.

Description

technical field [0001] The invention belongs to the technical field of manufacturing hybrid electric vehicles, and in particular relates to a control circuit of a hybrid electric vehicle. Background technique [0002] In today's increasingly tense oil energy, hybrid vehicles with less fuel consumption are getting more and more attention. A hybrid vehicle is equipped with a large-capacity battery as an energy source, and a high-voltage relay is installed between the battery and the load. The driver selects the power source as the internal combustion engine or the battery by controlling the on / off of the relay. It can be said that the relay is connected to the low-voltage control system. As a bridge between the electric circuit and the high-voltage power circuit, the current passing through the relay is sometimes as high as several hundred amperes. In such a large current and high voltage environment, the contacts of the relay are prone to arcing, resulting in sintering of the...

Claims

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Application Information

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IPC IPC(8): H01H47/00B60R21/01
Inventor 苏志高
Owner CHERY AUTOMOBILE CO LTD
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