Battery pack

Patent metadata

Field	Value
Publication number	US-11710873-B2
Application number	US-202117192312-A
Country	US
Kind code	B2
Filing date	Mar 4, 2021
Priority date	Mar 4, 2020
Publication date	Jul 25, 2023
Grant date	Jul 25, 2023

Abstract

A battery pack which is placed below a floor panel of a vehicle, includes a battery, a case for accommodating the battery, and a pressure release mechanism for releasing pressure inside the case. The pressure release mechanism includes a communication member which has one end and the other end and where the one end is connected to the case, and a gas discharge unit connected to the other end of the communication member and having a labyrinth structure.

First claim

What is claimed is:

1. A battery pack which is placed below a floor panel of a vehicle, comprising:
a battery;
a case for accommodating the battery; and
a pressure release mechanism for releasing pressure inside the case, wherein
the pressure release mechanism includes,
a communication member which has one end and the other end and where the one end is connected to the case, and
a gas discharge unit connected to the other end of the communication member and having a labyrinth structure,

a gas introduced into the gas discharge unit is discharged in a direction opposite to a direction in which the gas is introduced, and
the gas discharge unit includes a gas discharge unit body having a rectangular parallelepiped shape.

2. The battery pack according to claim 1 , wherein
the floor panel includes,
a floor portion covering an upper surface of the battery pack,
a bent portion which bends from the floor portion, and
a vertical wall portion extending upward from the bent portion,

the one end of the communication member is connected to a case rear surface of the case, and
the other end of the communication member is arranged so as to face upward and behind the case rear surface.

3. The battery pack according to claim 2 , wherein
a gas discharge port of the gas discharge unit is provided in a lower part of the gas discharge unit.

4. The battery pack according to claim 2 , wherein
the battery pack is arranged in front of a fuel tank of the vehicle, and
a part of the communication member is arranged on a side of the fuel tank.

5. The battery pack according to claim 1 , wherein
the communication member is provided with a metal mesh member so as to block a gas path.

6. The battery pack according to claim 4 , wherein
an exhaust pipe is provided on the side of the fuel tank, and
the communication member is arranged between a silencer provided in the exhaust pipe and the fuel tank in a vehicle width direction.

7. The battery pack according to claim 1 , wherein
the gas discharge unit further includes a gas discharge unit cover provided above the gas discharge unit body.

8. The battery pack according to claim 7 , wherein
the gas discharge unit cover is provided with a ring-shaped upper partition wall extending downward from an upper surface to be located in a recess portion when assembled to the gas discharge unit body so that the labyrinth structure is formed in the gas discharge unit.

9. The battery pack according to claim 1 , wherein
the gas discharge unit further includes a gas discharge unit cover provided above the gas discharge unit body,
a cylindrical portion having a through hole to which the communication member is connected is erected in a center of a lower surface of the gas discharge unit body,
gas discharge ports are provided at four corners of the lower surface,
a lower partition wall extending upward from the lower surface is provided along one side of each respective one of the gas discharge ports,
a recess portion is formed between the through hole and each of the gas discharge ports to surround the through hole by the cylindrical portion, the lower partition wall, and a side wall of the gas discharge unit body, and
the gas discharge unit cover is provided with a ring-shaped upper partition wall extending downward from an upper surface to be located in the recess portion when assembled to the gas discharge unit body so that the labyrinth structure is formed in the gas discharge unit.

10. A battery pack which is placed below a floor panel of a vehicle, comprising:
a battery;
a case for accommodating the battery; and
a pressure release mechanism for releasing pressure inside the case, wherein
the pressure release mechanism includes,
a communication member which has one end and the other end and where the one end is connected to the case, and
a gas discharge unit connected to the other end of the communication member and having a labyrinth structure,

a gas introduced into the gas discharge unit is discharged in a direction opposite to a direction in which the gas is introduced,
the gas discharge unit includes a gas discharge unit body,
a cylindrical portion having a through hole to which the communication member is connected is erected in a center of a lower surface of the gas discharge unit body, and
gas discharge ports are provided at four corners of the lower surface.

11. The battery pack according to claim 10 , wherein
a lower partition wall extending upward from the lower surface is provided along one side of each respective one of the gas discharge ports, and
a recess portion is formed between the through hole and each of the gas discharge ports to surround the through hole by the cylindrical portion, the lower partition wall, and a side wall of the gas discharge unit body.

12. The battery pack according to claim 11 , wherein
the gas discharge unit further includes a gas discharge unit cover provided above the gas discharge unit body, and
the gas discharge unit cover is provided with a ring-shaped upper partition wall extending downward from an upper surface to be located in the recess portion when assembled to the gas discharge unit body so that the labyrinth structure is formed in the gas discharge unit.

Assignees

• Honda Motor Co Ltd

Inventors

• Shimazaki Itsuki
• Fujii Ryo
• Ohkuma Kanae
• Iijima Takaaki
• Takai Takahiro
• Azuma Yohei

Classifications

• H01M50/249 Primary

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

• B60K1/04 Primary

  of the electric storage means for propulsion · CPC title

• B60K6/28

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

• B60K13/04

  concerning exhaust · CPC title

• B62D25/20

  Floors or bottom sub-units {(sub-frames for mounting engine or suspensions B62D21/11; drip trays F16N31/006)} · CPC title