JP2013146145A - Clamp structure of cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate a wiring operation of a low voltage cable.SOLUTION: A clamp structure of a cable comprises: a first clamp holding a cable for a high voltage to extract power of a battery to the outside; and a second clamp arranged below the first clamp, and holding a cable for a low voltage to transmit at least one of temperature information, voltage information and current information of the battery to a monitoring unit. The first clamp has a first housing part housing the cable for the high voltage, and a first lid part that can rotate between an opening position for opening the first housing part and a closing position for closing the first housing part. The second clamp has a second housing part housing the cable for the low voltage, and a second lid part that can rotate between an opening position for opening the second housing part and a closing position for closing the second housing part. The first lid part is inclined so that an upper end at the opening position is more isolated from the first housing than a lower end.

Description

  The present invention relates to a clamp structure for holding a cable.

  In recent years, electric vehicles and hybrid vehicles equipped with electric motors for running vehicles have been attracting attention and put into practical use as vehicles that are conscious of the global environment. The electric motor is driven by electric power output from a chargeable / dischargeable battery. The battery includes an assembled battery in which a plurality of unit cells are electrically connected, and power is taken out from the assembled battery by a high-voltage cable. On the other hand, the battery is provided with a monitoring unit that monitors voltage, current, temperature, and the like, and this monitoring unit acquires information output from the voltage sensor, current sensor, temperature sensor, and the like via a low-voltage cable. High-voltage cables have a larger diameter than low-voltage cables because high current flows.

  As a method for arranging the high-voltage cable and the low-voltage cable, a method of arranging the high-voltage cable on the upper side and the low-voltage cable on the lower side is known.

JP 2011-091903 A JP 2009-154824 A

  However, in the above-described method, when the high-voltage cable is routed, the fixing clamp for fixing the high-voltage cable greatly protrudes, so that the work field of view of the low-voltage cable is blocked.

  In order to solve the above-described problem, a cable clamp structure according to the present invention is arranged below a first clamp for holding a high-voltage cable for taking out battery power to the outside, and below the first clamp, A second clamp for holding a low voltage cable for transmitting at least one of the battery temperature information, voltage information and current information to a monitoring unit, wherein the first clamp is for the high voltage A first accommodating portion that accommodates a cable, and a first lid portion that is allowed to rotate between an open position that opens the first accommodating portion and a closed position that closes the first accommodating portion. The second clamp has a second accommodating portion that accommodates the low-voltage cable, an open position that opens the second accommodating portion, and a closed position that closes the second accommodating portion. Second rotation is allowed And a lid portion, said first lid portion, characterized in that the upper portion is inclined so that the position spaced from the first housing portion lower end portion in said open position.

  According to the present invention, it is possible to facilitate the work of arranging the low-voltage cable.

It is a perspective view of a battery pack. It is a perspective view in a part of battery pack. It is sectional drawing of a clamp.

  A battery pack to which the clamp structure according to this embodiment is applied will be described with reference to FIG. FIG. 1 is a perspective view of a battery pack. Fr corresponds to the vehicle forward direction, LH corresponds to the vehicle width direction, and UPR corresponds to the vehicle height direction. The definitions of these Fr, LH and UPR are the same in other drawings. Referring to FIG. 1, the battery pack 1 includes a plurality of assembled batteries 10, a pallet 20, a high voltage cable 30, a low voltage cable 40, a junction box 50, a clamp 60, and a monitoring unit 70. The battery pack 1 according to the present embodiment stores electric power supplied to an electric motor for running a vehicle. The vehicle may be an electric vehicle or a hybrid vehicle.

  The plurality of assembled batteries 10 are arranged in the LH direction and are fixed to the upper surface of the pallet 20. The assembled battery 10 is configured by electrically connecting a plurality of unit cells to each other. The single battery may be a secondary battery such as a lithium ion battery or a nickel metal hydride battery, or a capacitor. The plurality of assembled batteries 10 are electrically connected to each other. The connection method may be serial or parallel.

  The high voltage cable 30 is used for taking out the outputs of the plurality of assembled batteries 10 to the outside. One end 30 a of the high-voltage cable 30 is connected to a total plus terminal (which may be a total minus terminal) of the plurality of assembled batteries 10, and the other end 30 b is connected to the junction box 50. Since the output current of the battery pack 1 flows through the high voltage cable 30, the high voltage battery 30 is constituted by a cable (wire harness) that is thicker than the low voltage cable 40. The high voltage cable 30 is fixed by a clamp 60 at a fixing portion 30c indicated by hatching. Details of the clamp 60 will be described later.

  The monitoring unit 70 acquires at least one information among the voltage, current, and temperature of the plurality of assembled batteries 10 via the low voltage cable 40. An ECU (not shown) performs charge / discharge control, temperature control, and the like of the battery pack 1 based on information acquired by the monitoring unit 70.

  The clamp will be described in detail with reference to FIGS. FIG. 2 is a perspective view of a part of the battery pack. FIG. 3 is a cross-sectional view of the clamp. The clamp 60 includes a first clamp 61, a second clamp 62, and a clamp fixing portion 63. The first clamp 61 includes a first housing portion 611 and a first lid portion 612. The first lid portion 612 rotates between an open position where the first housing portion 611 is opened and a closed position where the first housing portion 611 is closed. FIG. 2 shows a state where the first lid 612 is located at the open position. In FIG. 3, the first lid portion 612 located at the open position is indicated by a dotted line, and the first lid portion 612 located at the closed position is indicated by a solid line.

  The upper end of the first lid 612 is bent, and a claw 612a is formed at the tip. A recess 611a is formed on the inner upper surface of the first housing portion 611, and the claw portion 612a is engaged with the recess 611a. When the claw portion 612a is engaged with the recess 611a, the first lid portion 612 is held in the closed position. The high-voltage cable 30 is incorporated into the first housing portion 611 with the first lid portion 612 positioned at the open position. After the high-voltage cable 30 is incorporated in the first housing portion 611, the high-voltage cable 30 can be fixed at the routing position by rotating the first lid portion 612 to the closed position.

  The second clamp 62 includes a second accommodating portion 621 and a second lid portion 622. The second lid 622 rotates between an open position where the second storage portion 621 is opened and a closed position where the second storage portion 621 is closed. FIG. 2 shows a state where the second lid 622 is located at the open position. In FIG. 3, the second lid 622 located at the open position is indicated by a dotted line, and the second lid 622 located at the closed position is indicated by a solid line.

  The upper end of the second lid 622 is bent, and a claw 622a is formed at the tip. A concave portion 621a is formed on the inner upper surface of the second accommodating portion 621, and the claw portion 622a is engaged with the concave portion 621a. When the claw portion 622a is engaged with the concave portion 621a, the second lid portion 622 is held in the closed position. The low-voltage cable 40 is incorporated into the second housing portion 621 with the second lid portion 622 positioned at the open position. After the low-voltage cable 40 is incorporated into the second housing portion 621, the low-voltage cable 40 can be fixed at the routing position by rotating the second lid portion 622 to the closed position.

  The second lid 622 extends in the horizontal direction at the open position, and projects in the horizontal direction.

  The clamp fixing portion 63 is formed in a flat plate shape. The clamp fixing portion 63 is formed with an opening 63a penetrating in the plate thickness direction (vertical direction). The pallet 20 is formed with a convex portion 20 a that is inserted into the opening 63 a of the clamp fixing portion 63. A screw groove is formed at the tip of the convex portion 20a. The clamp 60 is fixed to the pallet 20 by fastening the nut 64 from the upper side of the clamp fixing portion 63 to the convex portion 20a inserted into the opening 63a.

  A positioning projection 63 b is formed on the lower surface of the clamp fixing portion 63, and the positioning projection 63 b is inserted into a positioning hole 20 b formed in the pallet 20. Thereby, the clamp 60 is positioned with respect to the pallet 20.

  In the above-described configuration, the first lid portion 612 is inclined so that the upper end portion is located at a position farther from the first accommodating portion 611 than the lower end portion in the open position. As a result, when the low-voltage cable 40 is routed, it is possible to prevent the first lid portion 612 for the high-voltage cable 30 from overhanging and hindering the routing operation. That is, when the low-voltage cable 40 is routed, it is possible to prevent the first lid portion 612 from hindering the visibility, or the low-voltage cable 40 and the first lid portion 612 from interfering with each other.

  Here, when the angle formed by the first lid 612 located in the open position and the first lid 612 located in the closed position is θ, θ can be set to 44 to 45 °, for example. it can. Thereby, the above-mentioned effect can be obtained more reliably.

DESCRIPTION OF SYMBOLS 1 Battery pack 1 10 Assembly battery 20 Pallet 30 High voltage cable 40 Low voltage cable 50 Junction box 60 Clamp 61 1st clamp 62 2nd clamp 63 Clamp fixing | fixed part 70 Monitoring unit 611 1st accommodating part 612 1st cover part

Claims (1)

A first clamp for holding a high-voltage cable for taking out battery power to the outside;
A second clamp disposed below the first clamp and holding a low voltage cable for transmitting at least one of the battery temperature information, voltage information and current information to the monitoring unit. And
The first clamp is pivoted between a first accommodating portion that accommodates the high-voltage cable, an open position that opens the first accommodating portion, and a closed position that closes the first accommodating portion. An acceptable first lid,
The second clamp rotates between a second housing portion that houses the low-voltage cable, an open position that opens the second housing portion, and a closed position that closes the second housing portion. An acceptable second lid,
The cable lid structure according to claim 1, wherein the first lid portion is inclined so that an upper end portion thereof is positioned farther from the first accommodating portion than a lower end portion in the open position.

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