Battery pack of electric vehicle

Patent metadata

Field	Value
Publication number	US-2020075907-A1
Application number	US-201916554620-A
Country	US
Kind code	A1
Filing date	Aug 29, 2019
Priority date	Aug 31, 2018
Publication date	Mar 5, 2020
Grant date	—

Abstract

A battery case of an electric vehicle includes a drain hole for discharging water in the interior to the outside and a water detection device disposed in the vicinity of the drain hole. At least part of an upper face of a case bottom wall of the battery case is inclined downward toward the drain hole. Accordingly, not only is it possible to mold the downward inclination of the upper face of the case bottom wall of the battery case easily at the time of die casting without increasing the number of components, but it is also possible to guide water that has entered the interior of the battery case smoothly toward the drain hole, detect it reliably by the water detection device, and discharge it quickly via the drain hole.

First claim

What is claimed is:

1 . A battery pack of an electric vehicle comprising a plurality of battery modules housed in an interior of a battery case made by metal die-casting,
wherein the battery case comprises a drain hole for discharging water in its interior to an outside and a water detection device disposed in a vicinity of the drain hole, and at least part of an upper face of a case bottom wall of the battery case is inclined downward in going toward the drain hole.

2 . A battery pack of an electric vehicle comprising a plurality of battery modules housed in an interior of a battery case made by metal die-casting,
wherein the battery case comprises a drain hole discharging water in its interior to an outside and a water detection device disposed in a vicinity of the drain hole, and the drain hole is provided in a downwardly recessed recess portion formed in an upper face of a case bottom wall of the battery case.

3 . The battery pack of an electric vehicle according to claim 1 , wherein
the interior of the battery case is divided into two battery chambers by a beam portion formed integrally with the battery case, and the drain hole and the water detection device are provided in each of the battery chambers.

4 . The battery pack of an electric vehicle according to claim 3 , wherein
the beam portion extends in a vehicle width direction, and the drain hole and the water detection device are disposed in a middle part in the vehicle width direction of the battery case.

5 . The battery pack of an electric vehicle according to claim 1 , wherein
the battery case comprises a water jacket formed between the battery case and a lid member fixed to a lower face of the case bottom wall, and the drain hole is disposed at a position where the drain hole does not overlap the water jacket when viewed from above.

6 . The battery pack of an electric vehicle according to claim 5 , wherein
the battery case comprises a groove portion formed in an upper face of the case bottom wall, the groove portion being recessed downward along part of a periphery of the water jacket, and the groove portion extends toward the drain hole.

7 . The battery pack of an electric vehicle according to claim 1 , wherein
an electrical power line extending from the plurality of battery modules is disposed in a fore-and-aft direction in a space formed between the battery modules on left and right in the middle part in the vehicle width direction of the battery case, and a connecting wire connecting the water detection device to an electrical component is bundled with the electrical power line in the space.

Assignees

• Honda Motor Co Ltd

Inventors

• Shimazaki Itsuki
• Azuma Yohei
• Hidaka Shoshi

Classifications

• B60K2001/0438

  Arrangement under the floor · CPC title

• B60K1/04 Primary

  of the electric storage means for propulsion · CPC title

• B60L50/64 Primary

  Constructional details of batteries specially adapted for electric vehicles · CPC title

• B60K6/28

  characterised by the electric energy storing means, e.g. batteries or capacitors · CPC title

• B60Y2400/112

  Batteries · CPC title