Device for connecting a battery to an electric or hybrid vehicle, and battery housing comprising said connection device

摘要

A connection device 3 for connecting a battery 2 to an electric or hybrid motor vehicle, comprising at least one input 3a capable of being connected to a terminal of the battery and an output 3b capable of being connected to a first terminal of an electrical circuit of the vehicle. The device 3 also comprises an electrical-circuit cutoff device 8 mounted in series between the input 3a and the output 3b of the connection device 3. The cutoff device 8 comprises a pyrotechnic igniter connected to control terminals, the electrical opening of the cutoff device 8 being controlled by an electrical control signal applied to the said control terminals.

主权项

1. A connection device for connecting a battery to an electric or hybrid motor vehicle, comprising at least one first input adapted to be connected to a terminal of the battery and an output adapted to be connected to a first terminal of an electrical circuit of the vehicle, the device also comprising an electrical-circuit cutoff device mounted in series between the input and the output of the connection device, wherein the cutoff device comprises a pyrotechnic igniter connected to control terminals, the electrical opening of the cutoff device being controlled by an electrical control signal generated by a control circuit applied to said control terminals, and wherein the connection device also comprises a control unit comprising the control circuit and being adapted to deliver the electrical control signal to said control terminals,
wherein the control circuit comprises: a comparator configured to compare a threshold current with the current measured by a current sensor in series with the cutoff device, the comparator being connected to a logic gate, an optocoupler configured to react to types of defects other than an overcurrent circulating through the cutoff device, the optocoupler being connected to the logic gate, a power translator configured to inject a control current to the pyrotechnic igniter upon receiving an appropriate signal from the logic gate, and a DC/DC element connected on one side to a power supply and on the other side to the pyrotechnic igniter.