Vehicle battery pack

Patent metadata

Field	Value
Publication number	US-12046733-B2
Application number	US-202016990806-A
Country	US
Kind code	B2
Filing date	Aug 11, 2020
Priority date	Aug 21, 2019
Publication date	Jul 23, 2024
Grant date	Jul 23, 2024

Abstract

A vehicle battery pack capable of suppressing a variation in cooling performance for a battery module by a cooling pipe. A vehicle battery pack includes a cooling pipe in a flat plate shape that abuts a lower surface of respective one of battery modules; and an elastic urging member that urges the cooling pipe upward to make the cooling pipe abut the lower surface of respective one of the battery modules. The elastic urging member has plural elastically-deformable legs that are aligned in a longitudinal direction of the cooling pipe.

First claim

What is claimed is:

1. A vehicle battery pack comprising:
a battery module;
a cooling pipe in a flat plate shape that abuts a surface of the battery module, the cooling pipe having a longitudinal axis along which a cooling fluid flows, and a width perpendicular to the longitudial axis of the cooling pipe; and
an urging member configured to urge the cooling pipe in a direction to abut the surface of the battery module, the urging member has plural elastically-deformable legs that are aligned along the longitudinal axis of the cooling pipe;
wherein a longitudinal axis of each of the legs extends substantially perpendicular to the longitudinal axis of the cooling pipe, and each of the legs extends along the longitudinal axis of the respective leg across an entirety of the width of the cooling pipe; and
wherein each of the legs has a trapezoidal flat plate shape in the form of a single trapezoid when viewed in a transverse section perpedendicular to the longitudinal axis of the cooling pipe.

2. The vehicle battery pack according to claim 1 , wherein
the surface of the battery module is a lower surface of the battery module.

3. The vehicle battery pack according to claim 2 , wherein
a tip of each of the legs has a curved surface shape.

4. The vehicle battery pack according to claim 2 , wherein
each of the legs has a hollow shape.

5. The vehicle battery pack according to claim 2 , wherein
each of the legs has a tapered shape.

6. The vehicle battery pack according to claim 3 , wherein
each of the legs has a hollow shape.

7. The vehicle battery pack according to claim 3 , wherein
each of the legs has a tapered shape.

8. The vehicle battery pack according to claim 7 , wherein
the battery module has plural sheets of battery cells,
a number of the legs is the same as a number of the battery cells,
the plural legs are arranged in alignment in an alignment direction of the plural sheets of the battery cells, and
each of the legs is arranged at a position configured to apply an urging force to respective one of the battery cells.

9. The vehicle battery pack according to claim 7 , further comprising:
a holding member that is arranged between the cooling pipe and the urging member and is configured to hold the urging member relative to the cooling pipe.

10. The vehicle battery pack according to claim 9 , further comprising:
a heater configured to heat the battery module, wherein
the holding member is configured to hold the heater at a position capable of heating the battery module.

11. The vehicle battery pack according to claim 1 , wherein
a tip of each of the legs has a curved surface shape.

12. The vehicle battery pack according to claim 1 , wherein
each of the legs has a hollow shape.

13. The vehicle battery pack according to claim 12 , wherein
the urging member comprises plural pieces.

14. The vehicle battery pack according to claim 1 , wherein
each of the legs has a tapered shape.

15. The vehicle battery pack according to claim 1 , wherein
the urging member comprises plural pieces.

16. The vehicle battery pack according to claim 1 , wherein
the battery module has plural sheets of battery cells,
a number of the legs is the same as a number of the battery cells,
the plural legs are arranged in alignment in an alignment direction of the plural sheets of the battery cells, and
each of the legs is arranged at a position configured to apply an urging force to respective one of the battery cells.

17. The vehicle battery pack according to claim 1 , further comprising:
a holding member that is arranged between the cooling pipe and the urging member and is configured to hold the urging member relative to the cooling pipe.

18. The vehicle battery pack according to claim 17 , further comprising:
a heater configured to heat the battery module, wherein
the holding member is configured to hold the heater at a position capable of heating the battery module.

Assignees

• Mazda Motor

Inventors

• Harugaichi Shintaro
• Yamamoto Satoshi
• Iwata Kazuo
• Yan Yu
• Sasaki Shoichi

Classifications

• H01M50/20

  Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders (structural combination of accumulators with charging apparatus H01M10/46) · CPC title

• H01M10/6571

  Resistive heaters (arrangements for heating the battery by its resistance to the internal current H01M10/637) · CPC title

• H01M10/625

  Vehicles · CPC title

• H01M10/615

  Heating or keeping warm · CPC title

• H01M10/613

  Cooling or keeping cold · CPC title