Power battery pack and electric vehicle

Patent metadata

Field	Value
Publication number	US-12230820-B2
Application number	US-201917422130-A
Country	US
Kind code	B2
Filing date	Jun 21, 2019
Priority date	Jan 9, 2019
Publication date	Feb 18, 2025
Grant date	Feb 18, 2025

Abstract

Provided are a power battery pack and an electric vehicle. The power battery pack includes: a pack body; and a plurality of cells, directly arranged in the pack body. The cell extends from a first side of the pack body to a second side of the pack body, and the first side and the second side are disposed opposite to each other. The first side of the pack body is provided with a first side wall, the second side of the pack body is provided with a second side wall, an end of the cell is supported by the first side wall, and the other end of the cell is supported by the second side wall.

First claim

What is claimed is:

1. A power battery pack, comprising:
a pack body comprising a first side wall and a second side wall opposite to the first side wall; and
a plurality of cells, directly arranged in the pack body, wherein:
one of the plurality of cells comprises a battery body, a first electrical terminal connected to a first electrode tab and disposed at a first end of the battery body, and a second electrical terminal connected to a second electrode tab and disposed at a second end of the battery body;
the one of the plurality of cells extends from the first side wall to the second side wall; and
the first end of the battery body is supported by the first side wall, and the second end of the battery body is supported by the second side wall.

2. The power battery pack according to claim 1 , wherein a length direction of the one of the plurality of cells extends along a width direction of the pack body, the first side wall is disposed on a side of the pack body in the width direction of the pack body, and the second side wall is disposed on another side of the pack body in the width direction of the pack body.

3. The power battery pack according to claim 1 , wherein a sum V1 of volumes of the plurality of cells and a volume V2 of the power battery pack meet: V1/V≥55%.

4. The power battery pack according to claim 3 , wherein V1/V≥60%.

5. The power battery pack according to claim 1 , wherein an accommodating space is formed in the pack body, and the plurality of cells are directly arranged in the accommodating space; and
a sum V1 of volumes of the plurality of cells and a volume V0 of the accommodating space meet: 81%≤V1/V0≤97%.

6. The power battery pack according to claim 1 , wherein an accommodating space is formed in the pack body, and the plurality of cells are directly arranged in the accommodating space; and
the accommodating space has a bottom surface, and a sum S1 of areas of orthographic projections of the plurality of cells on the bottom surface and an area S0 of the bottom surface meet: 72%≤S1/S0≤88%.

7. The power battery pack according to claim 1 , wherein a length direction of the one of the plurality of cells is in parallel with a width direction of the power battery pack, and the plurality of cells are arranged along a length direction of the power battery pack; and
only one cell is accommodated in the pack body in the width direction of the power battery pack.

8. The power battery pack according to claim 1 , wherein a length direction of the one of the plurality of cells is in parallel with a width direction of the power battery pack, and the plurality of cells are arranged along a length direction of the power battery pack; and
in the width direction of the power battery pack, a shortest distance between the first end of the battery body and a side beam of the pack body close to the first end of the battery body is L1, a shortest distance between the second end of the battery body and a side beam of the pack body close to the second end of the battery body is L2, and a length L0 of the one of the plurality of cells meets: L1+L2<L0.

9. The power battery pack according to claim 1 , wherein a length direction of the one of the plurality of cells is in parallel with a width direction of the power battery pack, and the plurality of cells are arranged along a length direction of the power battery pack; and
the battery body extends along the width direction of the power battery pack.

10. The power battery pack according to claim 7 , wherein the pack body comprises two side beams located respectively on two sides of the power battery pack in the width direction of the power battery pack, and the first and second ends of the battery body are supported respectively by the two side beams; and
the pack body comprises two end beams located respectively at two ends of the power battery pack in the length direction of the power battery pack.

11. The power battery pack according to claim 1 , wherein a length direction of the one of the plurality of cells is in parallel with a width direction of the power battery pack, the plurality of cells are arranged along the length direction of the power battery pack, and at least two layers of battery arrays are arranged in the pack body along a height direction of the power battery pack.

12. The power battery pack according to claim 1 , wherein a length direction of the one of the plurality of cells is in parallel with a length direction of the power battery pack, and the plurality of cells are arranged along a width direction of the power battery pack; and
only one cell is accommodated in the pack body in the length direction of the power battery pack.

13. The power battery pack according to claim 1 , wherein a length direction of the one of the plurality of cells is in parallel with a length direction of the power battery pack, and the plurality of cells are arranged along a width direction of the power battery pack; and
in the length direction of the power battery pack, a shortest distance between the first end of the battery body and a first end beam of the pack body close to the first end of the battery body is L3, a shortest distance between the second end of the battery body and a second end beam of the pack body close to the second end of the battery body is L4, and a length L0 of each cell meets: L3+L4<L0.

14. The power battery pack according to claim 1 , wherein a length direction of the one of the plurality of cells is in parallel with a length direction of the power battery pack, and the plurality of cells are arranged along a width direction of the power battery pack; and
the one of the plurality of cells extends along the length direction of the power battery pack.

15. The power battery pack according to claim 12 , wherein the pack body comprises two end beams located respectively on two ends of the power battery pack in the length direction of the power battery pack, and the first and second ends of the battery body are supported respectively by the two end beams; and
the pack body comprises two side beams located at two sides of the power battery pack in the width direction of the power battery pack.

16. The power battery pack according to claim 12 , wherein at least two layers of battery arrays are arranged in the pack body along a height direction of the power battery pack.

17. The power battery pack according to claim 1 , wherein the pack body comprises a vehicle-use tray connected to a vehicle body.

18. The power battery pack according to claim 1 , wherein a width F of the pack body in a width direction of the power battery pack is 500 mm to 1500 mm.

19. The power battery pack according to claim 1 , further comprising at least one of a battery management system and a battery thermal management system.

20. The power battery pack according to claim 1 , wherein the pack body is integrally formed on an electric vehicle.

21. The power battery pack according to claim 1 , wherein the battery body has a length L, a width H, and a thickness D, the length L of the battery body is greater than the width H, and the width H of the battery body is greater than the thickness D, wherein the length L and the width H of the battery body meet: L/H=4 to 21.

22. The power battery pack according to claim 1 , wherein a length L of the battery body and a thickness D of the battery body meet: L/D=23 to 208.

23. The power battery pack according to claim 1 , wherein a length L of the battery body and a vol

Assignees

• Byd Co Ltd

Inventors

• He Long
• Sun Huajun
• Jiang Wenfeng
• Lu Zhipei
• Zheng Weixin
• Tang Jianglong
• Zhu Yan
• Wang Xinyue
• He Kefeng

Classifications

• H01M2010/4271

  Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing · CPC title

• H01M10/425

  Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00) · CPC title

• H01M50/271

  Lids or covers for the racks or secondary casings · CPC title

• H01M50/543

  Terminals · CPC title

• B60L58/26

  by cooling · CPC title