JP2019098768A - Collision detection system - Google Patents

Abstract

To detect a collision of a vehicle while suppressing power consumption during a charging period using an external power supply.
A collision detection system (100) is mounted on a hybrid vehicle (1) provided with a drive battery (11). The collision detection system is electrically connected to the drive battery on condition that the collision is detected by the first collision detection means (33) for detecting a collision when the hybrid vehicle is operating, and the first collision detection means First control means (31) for interrupting the relay circuit (12) and second collision detection means (for detecting collision of the hybrid vehicle when the drive battery is charged by the external power supply external to the hybrid vehicle ( 34) and second control means (13) which shuts off the relay circuit on condition that a collision is detected by the second collision detection means, and which consumes less power than the first control means.
[Selected figure] Figure 1

Description

  The present invention relates to the technical field of a collision detection system that detects a collision of a vehicle.

  As this type of system, for example, when a storage battery mounted on a vehicle is being charged by power from an external charging facility, a primary side circuit having a storage battery and an electrical device are detected when a collision with the vehicle is detected. A system has been proposed for interrupting the electrical connection with the secondary side circuit having the (see Patent Document 1).

JP, 2011-217544, A

  According to the technology described in Patent Document 1, it is necessary to maintain an activated state of an ECU (Electronic Control Unit), which is the core of a vehicle system, during a charging period in which a storage battery is charged with power from an external charging facility. There is a technical problem that power consumption during the period is relatively large.

  The present invention has been made in view of the above problems, and provides a collision detection system capable of detecting a collision of a vehicle while suppressing power consumption during a charging period using a power supply external to the vehicle. As an issue.

  A collision detection system according to an aspect of the present invention is a collision detection system mounted on a hybrid vehicle including a drive battery, the first collision detection unit detecting a collision during operation of the hybrid vehicle, and the first collision detection system. First driving means for interrupting the relay circuit electrically connected to the driving battery on condition that a collision is detected by the collision detecting means, and the driving battery is driven by an external power supply external to the hybrid vehicle A second collision detection unit that detects a collision of the hybrid vehicle while being charged, and the first control that shuts off the relay circuit on the condition that a collision is detected by the second collision detection unit. And second control means that consumes less power than the means.

It is a block diagram showing composition of a collision detection system concerning an embodiment.

  An embodiment according to a collision detection system will be described with reference to FIG. FIG. 1 is a block diagram showing the configuration of a collision detection system according to an embodiment.

  In FIG. 1, a collision detection system 100 is mounted on a hybrid vehicle 1. Hybrid vehicle 1 includes a battery pack assembly 10 having a battery 11 capable of supplying power to a driving motor (not shown). The battery pack assembly 10 has, in addition to the battery 11, a relay circuit 12 electrically connected to the battery 11, and a battery ECU 13 for controlling the relay circuit 12.

  The hybrid vehicle 1 includes a charger 21 electrically connected to the relay circuit 12 and an AC charge inlet 22 electrically connected to the charger 21. In hybrid vehicle 1, AC charging connector 41 of power cable 40 is coupled to AC charging inlet 22, and plug 42 of power cable 40 is coupled to an external power supply (not shown), whereby battery 11 is externally connected. It is configured to be chargeable by the power from the power supply. That is, the hybrid vehicle 1 is a so-called plug-in hybrid vehicle.

  The collision detection system 100 includes a battery ECU 13, a hybrid vehicle integrated ECU 31 (hereinafter referred to as “HV integrated ECU 31” as appropriate), an airbag ECU 32, and collision detection sensors 33 and 34. In the present embodiment, a part of the functions of each of the various types of electronic control battery ECU 13, the HV integrated ECU 31, and the airbag ECU 32 is used as a part of the collision detection system 100.

  The collision detection sensor 33 is typically disposed at the front of the hybrid vehicle 1 (for example, an engine room or the like). The collision detection sensor 33 mainly detects a collision of the hybrid vehicle 1 while the hybrid vehicle 1 is traveling. When the collision detection sensor 33 detects a collision, the collision detection sensor 33 transmits a signal indicating that the collision is detected (hereinafter referred to as a “collision signal” as appropriate) to the HV integrated ECU 31 via the airbag ECU 32. The HV integrated ECU 31 having received the collision signal shuts off the relay circuit 12 via the battery ECU 13.

  The collision detection sensor 34 is typically disposed in the vicinity of the AC charge inlet 22. The collision detection sensor 34 mainly detects a collision of the hybrid vehicle 1 when the battery 11 is being charged by the power of the external power supply. The collision detection sensor 34 transmits a collision signal to the battery ECU 13 when a collision is detected. The battery ECU 13 receiving the collision signal shuts off the relay circuit 12. The power consumption of the battery ECU 13 is smaller than the power consumption of the HV integrated ECU 31.

(Technical effect)
When the battery 11 is being charged by the power from the external power supply, there is a possibility that an object such as another vehicle may collide with the hybrid vehicle 1. In particular, the charging period of the battery 11 by the external power supply is relatively long, and the possibility that the user is not near the hybrid vehicle 1 is relatively high. Therefore, it is desirable to cope with the collision of the hybrid vehicle 1 in the charging period of the battery 11 by the external power supply. On the other hand, when, for example, the HV integrated ECU 31 is constantly activated in order to cope with the collision during the charging period of the battery 11 by the external power supply, the power consumption in the charging period becomes relatively large.

  As described above, the collision signal from the collision detection sensor 34 is directly transmitted to the battery ECU 13. Therefore, in the collision detection system 100, there is no need to activate the HV integrated ECU 31 or the airbag ECU 32 when the battery 11 is charged by the power from the external power supply. That is, in the collision detection system 100, when at least the battery ECU 13 is activated while the battery 11 is being charged by the power from the external power supply, the relay circuit 12 is generated when an object collides with the hybrid vehicle 1 Can be cut off properly. Therefore, according to the said collision detection system 100, the power consumption in the charge period of the battery 11 by an external power supply can be suppressed.

  Various aspects of the invention derived from the embodiments described above are described below.

  A collision detection system according to an aspect of the present invention is a collision detection system mounted on a hybrid vehicle including a drive battery, the first collision detection unit detecting a collision during operation of the hybrid vehicle, and the first collision. The drive battery is charged by a first control means for interrupting the relay circuit electrically connected to the drive battery on condition that a collision is detected by the detection means, and the external power supply external to the hybrid vehicle A second collision detection means for detecting a collision of the hybrid vehicle, and the first control means for interrupting the relay circuit on the condition that a collision is detected by the second collision detection means; And a second control unit that consumes less power. In the above embodiment, the “collision detection sensor 33” corresponds to an example of the first collision detection means, the “HV integrated ECU 31” corresponds to an example of the first control means, and the “collision detection sensor 34” is the second It corresponds to an example of a collision detection means, and "battery ECU13" corresponds to an example of a 2nd control means.

  In the collision detection system, when a collision is detected by the second collision detection unit when the drive battery of the hybrid vehicle is charged by the external power supply, the second control unit consumes less power than the first control unit. Relay circuit is cut off. Therefore, in the collision detection system, there is no need to activate the first control means when the drive battery is charged by the external power supply. Therefore, according to the collision detection system, the collision can be detected while suppressing the power consumption when the drive battery is charged by the external power supply.

  The present invention is not limited to the embodiments described above, and can be suitably modified without departing from the scope or spirit of the invention as can be read from the claims and the specification as a whole, and a collision detection system with such modifications. Also within the technical scope of the present invention.

  DESCRIPTION OF SYMBOLS 1 hybrid vehicle 10 battery pack assembly 11 battery 12 relay circuit 13 battery ECU 21 charger 22 AC charging inlet 31 hybrid vehicle integrated ECU 32 airbag ECU 33 , 34: collision detection sensor, 40: power cable, 41: AC charging connector, 42: plug, 100: collision detection system

Claims (1)

A collision detection system mounted on a hybrid vehicle having a drive battery, comprising:
First collision detection means for detecting a collision when the hybrid vehicle is operating;
First control means for interrupting a relay circuit electrically connected to the drive battery on condition that a collision is detected by the first collision detection means;
Second collision detection means for detecting a collision of the hybrid vehicle when the drive battery is charged by an external power supply external to the hybrid vehicle;
Second control means for interrupting the relay circuit on condition that a collision is detected by the second collision detection means, power consumption being smaller than that of the first control means;
A collision detection system comprising:

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