Battery device for vehicle

Patent metadata

Field	Value
Publication number	US-11329343-B2
Application number	US-202016820369-A
Country	US
Kind code	B2
Filing date	Mar 16, 2020
Priority date	Apr 24, 2019
Publication date	May 10, 2022
Grant date	May 10, 2022

Abstract

A battery device for a vehicle, which can be miniaturized while including ancillary instruments such as a relay device. The battery device is mounted in a lower portion of a vehicle, and including a battery case; a plurality of battery modules accommodated in the battery case and arranged such that at least some of the battery modules are stacked in a plurality of levels; and a first relay device that switches connection and disconnection between external electric devices and the battery modules. The first relay device is disposed on a side in a vehicle width direction of a portion where the battery modules are stacked in a plurality of levels.

First claim

What is claimed is:

1. A battery device for a vehicle, the battery device being mounted in a lower portion of a vehicle and comprising:
a battery case;
a plurality of battery modules accommodated in the battery case and arranged such that at least some of the battery modules are stacked in a plurality of levels as stacked battery modules in a vehicle up-down direction; and
a first relay that switches connection and disconnection between an external electric device and the battery modules, the first relay being disposed on a side in a vehicle width direction of the stacked battery modules, wherein
the relay includes a mounting structure having a mounting surface that extends along the vehicle up-down direction, and a plurality of relay components mounted on the mounting surface.

2. The battery device for a vehicle according to claim 1 , further comprising:
a second relay that connects the battery modules and an electric motor mounted on the vehicle, the second relay being disposed in a front end portion of the battery case in a front-rear direction of the vehicle.

3. The battery device for a vehicle according to claim 1 , wherein
the vehicle includes a charger configured to charge the battery modules, the charger being disposed on a rear side of the vehicle relative to the battery device, and
the first relay switches connection and disconnection between the charger and the battery modules.

4. The battery device for a vehicle according to claim 1 , further comprising:
a battery controller configured to control the first relay, the battery controller being disposed on an opposite side to the first relay with respect to the stacked battery modules in the vehicle width direction.

5. The battery device for a vehicle according to claim 4 , wherein
in a side view of the vehicle, the first relay is disposed to overlap with the stacked battery modules.

6. The battery device for a vehicle according to claim 1 , wherein
the battery modules disposed at an upper level of the stacked battery modules are shifted toward a rear side of the vehicle in the vehicle front-rear direction relative to the battery modules disposed at a lower level of the stacked battery modules, and
a wire harness connected to the first relay is disposed in a space provided by shifting the battery modules at the upper level toward the rear side of the vehicle.

7. A battery device for a vehicle, the battery device being mounted in a lower portion of a vehicle and comprising:
a battery case;
a plurality of battery modules accommodated in the battery case and arranged such that at least some of the battery modules are stacked in a plurality of levels as stacked battery modules in a vehicle up-down direction;
a first relay that switches connection and disconnection between an external electric device and the battery modules, the first relay being disposed on a side in a vehicle width direction of the stacked battery modules; and
a second relay that connects the battery modules and an electric motor mounted on the vehicle, the second relay being disposed in a front end portion of the battery case in a front-rear direction of the vehicle, wherein
in a side view of the vehicle, the first relay is disposed to overlap with the stacked battery modules.

8. A battery device for a vehicle, the battery device being mounted in a lower portion of a vehicle and comprising:
a battery case;
a plurality of battery modules accommodated in the battery case and arranged such that at least some of the battery modules are stacked in a plurality of levels as stacked battery modules in a vehicle up-down direction; and
a first relay that switches connection and disconnection between an external electric device and the battery modules, the first relay being disposed on a side in a vehicle width direction of the stacked battery modules, wherein
the vehicle includes a charger configured to charge the battery modules, the charger being disposed on a rear side of the vehicle relative to the battery device,
the first relay switches connection and disconnection between the charger and the battery modules, and
in a side view of the vehicle, the first relay is disposed to overlap with the stacked battery modules.

9. A battery device for a vehicle, the battery device being mounted in a lower portion of a vehicle and comprising:
a battery case;
a plurality of battery modules accommodated in the battery case and arranged such that at least some of the battery modules are stacked in a plurality of levels as stacked battery modules in a vehicle up-down direction;
a first relay that switches connection and disconnection between an external electric device and the battery modules, the first relay being disposed on a side in a vehicle width direction of the stacked battery modules; and
a second relay that connects the battery modules and an electric motor mounted on the vehicle, the second relay being disposed in a front end portion of the battery case in a front-rear direction of the vehicle, wherein
the vehicle includes a charger configured to charge the battery modules, the charger being disposed on a rear side of the vehicle relative to the battery device, and
the first relay switches connection and disconnection between the charger and the battery modules.

10. The battery device for a vehicle according to claim 7 , wherein
the vehicle includes a charger configured to charge the battery modules, the charger being disposed on a rear side of the vehicle relative to the battery device, and
the first relay switches connection and disconnection between the charger and the battery modules.

11. The battery device for a vehicle according to claim 7 , further comprising:
a battery controller configured to control the first relay, the battery controller being disposed on an opposite side to the first relay with respect to the stacked battery modules in the vehicle width direction.

12. The battery device for a vehicle according to claim 7 , wherein
the battery modules disposed at an upper level of the stacked battery modules are shifted toward a rear side of the vehicle in the vehicle front-rear direction relative to the battery modules disposed at a lower level of the stacked battery modules, and
a wire harness connected to the first relay is disposed in a space provided by shifting the battery modules at the upper level toward the rear side of the vehicle.

13. The battery device for a vehicle according to claim 8 , further comprising:
a battery controller configured to control the first relay, the battery controller being disposed on an opposite side to the first relay with respect to the stacked battery modules in the vehicle width direction.

14. The battery device for a vehicle according to claim 8 , wherein
the battery modules disposed at an upper level of the stacked battery modules are shifted toward a rear side of the vehicle in the vehicle front-rear direction relative to the battery modules disposed at a lower level of the stacked battery modules, and
a wire harness connected to the first relay is disposed in a space provided by shifting the battery modules at the upper level toward the rear side of the vehicle.

15. The battery device for a vehicle according to claim 9 , further comprising:
a battery controller configured to control the first relay, the battery controller being disposed on an opposite side to the first relay with respect to the stacked battery modules in the vehicle width direction.

16. The battery device for a vehicle according to claim 9 , wherein
the battery modules disposed at an upper level of the stac

Assignees

• Mazda Motor

Inventors

• Iwata Kazuo
• Kono Junya
• Yayoshi Yoshihiko
• Masui Tomohiro
• Matsushima Tomoyoshi
• Jo Kunihiro
• Watanabe Daisuke
• Katayama Yoshinobu

Classifications

• B60L50/64 Primary

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

• H01M50/249

  specially adapted for aircraft or vehicles, e.g. cars or trains (constructional details of batteries specially adapted for electric vehicles B60L50/64) · CPC title

• H01M50/204

  Racks, modules or packs for multiple batteries or multiple cells · CPC title

• B60L50/66

  Arrangements of batteries · CPC title

• B60K2001/0433

  Arrangement under the rear seats · CPC title