Battery pack, vehicle, and energy storage device

Patent metadata

Field	Value
Publication number	US-12537254-B2
Application number	US-202318348698-A
Country	US
Kind code	B2
Filing date	Jul 7, 2023
Priority date	Jan 9, 2019
Publication date	Jan 27, 2026
Grant date	Jan 27, 2026

Abstract

A battery pack, a vehicle, and an energy storage device are provided. The battery pack includes a cell array and a support member, where the cell array includes a plurality of cells, the cell has a first dimension, and the first dimension is a maximum spacing between two imaginary parallel planes sandwiching the cell; and at least one of the cells 600 mm≤first dimension≤2500 mm the at least one cell includes a casing and a core located inside the casing, a supporting region is formed on the casing, and the cell is connected to the support member through the supporting region and is supported by the support member. The support member is connected to the supporting region to support the cell.

First claim

What is claimed is:

1 . A battery pack, comprising a cell array, a sealing cover and a tray,
wherein the tray includes a bottom plate and a support member comprising a first side beam and a second side beam; wherein the cell array comprises a plurality of cells, each of the cells comprising a cell body defined by a length L, a thickness D, and a height H extending between a top and a bottom of the cell body, the bottom of the cell body of each of the plurality of cells facing the bottom plate, the height H being continuous along the length L, and having a volume V, a length direction of the cell body defines a Y direction between a first end of the cell body and a second end of the cell body, wherein 600 mm≤L≤2500 mm, 10≤L/D≤208, 4≤L/H≤208, 0.0005 mm −2 ≤L/V≤0.002 mm −2 ; wherein:
the first side beam and the second side beam are disposed along the Y direction at opposing ends of the bottom plate;
an inner wall surface of the first side beam facing toward the plurality of cells has a first supporting surface and a first connecting surface;
an inner wall surface of the second side beam facing toward the plurality of cells has a second supporting surface and a second connecting surface;
the first end of the cell body of each of the plurality of cells is supported by the first supporting surface;
the second end of the cell body of each of the plurality of cells is supported by the second supporting surface;
a first end plate is connected to the first connecting surface and positioned between the first end of each of the cells and the first side beam;
a second end plate is connected to the second connecting surface and positioned between the second end of the cell body of each of the plurality of cells and the second side beam;
wherein:
the battery pack further comprises a first side plate component and a second side plate component configured to sandwich the cell array therebetween, wherein the first side plate component and the second side plate component are adjacent to the first end plate and the second end plate.

2 . The battery pack according to claim 1 , wherein the cell body of each of the plurality of cells has a surface area S, a relationship between the surface area S and the volume V of the cell body is 0.1 mm −1 ≤S/V≤0.35 mm −1 , and a relationship between the height H and the volume V of the cell body is 0.0001 mm −2 ≤H/V≤0.00015 mm −2 .

3 . The battery pack according to claim 1 , wherein for each of the plurality of cells, the height H of the cell body is greater than or equal to the thickness D of the cell body, a relationship between the length L and the thickness D is 23≤L/D≤208, a relationship between the length L and the height H is 4≤L/H≤21, and the length L is 600 mm≤L≤1500 mm.

4 . The battery pack according to claim 1 , wherein a distance from the first connecting surface to the sealing cover is less than a distance from the first supporting surface to the sealing cover; and a distance from the second connecting surface to the sealing cover is less than a distance from the second supporting surface to the sealing cover.

5 . The battery pack according to claim 1 , wherein the inner wall surface of the first side beam facing toward the plurality of cells has a step structure comprising at least two steps, and sides of two of the at least two steps facing toward the sealing cover respectively form the first connecting surface and the first supporting surface; and
the inner wall surface of the second side beam facing toward the plurality of cells has a step structure comprising at least two steps, and sides of two of the at least two steps facing toward the sealing cover respectively form the second connecting surface and the second supporting surface.

6 . The battery pack according to claim 1 , wherein a management accommodating cavity for accommodating battery management components and power distribution components is defined between the first connecting surface, the second connecting surface, the plurality of cells, and the sealing cover.

7 . The battery pack according to claim 1 , wherein the first end of at least one of the plurality of cells is provided with an explosion-proof valve, the first side beam comprises an exhaust passage, an exhaust vent is provided at a position on the first side beam corresponding to the explosion-proof valve and is in communication with the exhaust passage, and the battery pack is provided with an exhaust outlet in communication with the exhaust passage.

8 . The battery pack according to claim 1 , the tray further comprising a third side beam and a fourth side beam disposed opposite the third side beam along an X direction defined by the thickness of the cell body of each of the plurality of cells, wherein the third side beam and the fourth side beam provide a pressing force to the cell array.

9 . The battery pack according to claim 8 , further comprising:
a first elastic apparatus elastically sandwiched between the third side beam and a cell of the plurality of cells positioned directly adjacent to the third side beam; and a second elastic apparatus elastically sandwiched between the fourth side beam and a cell of the plurality of cells positioned directly adjacent to the fourth side beam.

10 . The battery pack according to claim 8 , further comprising:
a first side plate disposed between the third side beam and the cell of the plurality of cells positioned directly adjacent to the third side beam; and a second side plate is disposed between the fourth side beam and the cell of the plurality of cells positioned directly adjacent to the fourth side beam.

11 . The battery pack according to claim 10 , further comprising:
a first panel and a second panel, respectively connected to upper surfaces and lower surfaces of at least some of the plurality of cells; and wherein the first end plate, the second end plate, the first side plate, and the second side plate are each connected to the first panel and the second panel.

12 . The battery pack according to claim 1 , further comprising a heat exchange plate mounted on an upper surface of the cell array.

13 . The battery pack according to claim 1 , wherein the first end plate, the second end plate, or the first end plate and the second end plate comprise an insulating plate.

14 . The battery pack according to claim 1 , wherein a distance between the inner wall surface of the first side beam and the inner wall surface of the second side beam is L 2 , and a relationship between L and L 2 is L/L 2 ≤50%.

15 . The battery pack according to claim 14 , wherein the relationship between L and L 2 is 80%≤L/L 2 ≤97%.

16 . The battery pack according to claim 1 , wherein at least some of the plurality of cells are bonded to another of the plurality of cells by an adhesive.

17 . The battery pack according to claim 1 , wherein the battery pack contains only one of the plurality of cells along the Y direction.

18 . The battery pack according to claim 1 , wherein the plurality of cells are spaced apart from the bottom plate.

19 . The battery pack according to claim 1 , wherein each of the plurality of cells has a cuboid shape.

20 . A battery pack, comprising a cell array, a sealing cover and a tray, wherein the tray includes a bottom plate and a support member comprising a first side beam and a second side beam;
wherein the cell array comprises a plurality of cells, each of the cells comprising a cell body defined by a length L, a thickness D, and a height H extending between a top an

Assignees

• Byd Co Ltd

Inventors

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

Classifications

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• 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

• B60L58/26

  by cooling · CPC title

• B60K2001/0438

  Arrangement under the floor · CPC title

• B60K2001/0405

  characterised by their position · CPC title