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CN-122000586-A - Battery pack and vehicle

CN122000586ACN 122000586 ACN122000586 ACN 122000586ACN-122000586-A

Abstract

A battery pack and a vehicle are provided. In particular, the present disclosure relates to a battery pack (4) comprising a battery cladding (6), the battery cladding (6) comprising-a bottom plate (8) comprising a first support surface (10) facing away from the bottom plate (8) in a first direction (d 1) along a third axis (z), and further comprising a second support surface (12) facing away from the bottom plate (8) in a second direction (d 2) opposite to the first direction (d 1), -a first battery stack layer (14) arranged on the first support surface (10), -a second battery stack layer (16) arranged on the second support surface (12), -a frame means (18) mechanically connected to the bottom plate (8) and enclosing the first and second battery stack layers (14, 16). The disclosure also relates to a vehicle (2).

Inventors

  • Dilendra Lauter
  • Mike Iranezad
  • Casper Rongsong

Assignees

  • 沃尔沃卡车集团

Dates

Publication Date
20260508
Application Date
20251028
Priority Date
20241105

Claims (15)

  1. 1. A battery pack (4) having a first extension along a first axis (x), a second extension along a second axis (y), and a third extension along a third axis (z), wherein the first, second, and third axes (x, y, z) are perpendicular, the battery pack (4) comprising a battery cladding (6), the battery cladding (6) comprising: -a soleplate (8) comprising a first supporting surface (10) facing away from the soleplate (8) in a first direction (d 1) along the third axis (z), and further comprising a second supporting surface (12) facing away from the soleplate (8) in a second direction (d 2) opposite to the first direction (d 1), A first cell stack layer (14) arranged on the first support surface (10), A second cell stack layer (16) arranged on the second support surface (12), Frame means (18) mechanically connected to said base plate (8) and closing said first and second cell stack layers (14, 16), as shown in a section perpendicular to said third axis (z), Wherein the first stack layer (14) and the second stack layer (16) each comprise: a plurality of cell stacks (20), each cell stack comprising a plurality of battery cells (22) stacked together, And wherein the frame means (18) comprises: A pair of side walls (24) extending along the first axis (x), wherein the plurality of cell stacks (20) are located between the pair of side walls (24) along the second axis (y), -A pair of end members (25) extending along the second axis (y) and mechanically connecting the pair of side walls (24), and wherein the plurality of cell stacks (20) are located between the pair of end members (25).
  2. 2. The battery pack (4) of claim 1, wherein the plurality of battery cells (22) of the respective battery cell stack are stacked along the second axis (y), and wherein the plurality of cell stacks (20) are arranged along the first axis (x).
  3. 3. The battery pack (4) according to any one of the preceding claims, wherein the battery pack further comprises a cross member (26) extending along the second axis (y) and mechanically connecting the pair of side walls (24), and wherein the cross member (26) is located between adjacent cell stacks (20).
  4. 4. A battery pack (4) according to claim 3, wherein the cross member (26 ") is attached to the base plate (8) via at least one first fastener (29).
  5. 5. The battery pack (4) according to claim 4, wherein the cross member (26 ") is arranged on one of the first support surface (10) and the second support surface (12), wherein the battery pack (4) is configured such that the at least one first fastener (29) attaching the cross member (26") to the base plate (8) has been inserted from the other of the first support surface (10) and the second support surface (12).
  6. 6. Battery pack (4) according to any of the preceding claims, wherein the battery cladding comprises a clamping member (28) configured to clamp at least one of the battery cells (22), wherein the clamping member (28) is mechanically connected to the frame means (18) enclosing the at least one battery cell (22) and/or to the bottom plate (8) on which the at least one battery cell (22) is arranged, such that the clamping member (28) applies a clamping force through the at least one battery cell (22) towards the bottom plate (8) on which the at least one battery cell (22) is arranged.
  7. 7. The battery pack (4) of claim 6, also depending on any of claims 3 to 5, wherein the clamping member (28) is configured to clamp at least one of the battery cells (22) located in at least one of the adjacent cell stacks (20) between which the cross member (26) is located, and wherein the clamping member (28) is mechanically connected to the cross member (26), such as via a second fastener (30).
  8. 8. The battery pack (4) of claim 7, wherein the clamping member (28) extends along the first axis (x) such that the clamping member (28) and the cross-member (26) form a T-shape, as shown in a cross-section perpendicular to the second axis (y), wherein at least one of the battery cells (22) in each of the adjacent cell stacks (20) between which the cross-member (26) is located is clamped by the clamping member (28).
  9. 9. The battery pack (4) according to any of the preceding claims, wherein the bottom plate (8) is a cooling plate (8) comprising at least one coolant conduit (82) for a coolant.
  10. 10. Battery pack (4) according to any of the preceding claims, comprising at least two of the battery layers (6) stacked on top of each other along the third axis (z).
  11. 11. Battery pack (4) according to claim 10, wherein the at least two of the battery layers (6) stacked on top of each other along the third axis (z) are mechanically connected to each other via the frame means (18).
  12. 12. The battery pack (4) according to claim 11, wherein at least two adjacent stacked battery layers (6) of the at least two battery layers (6) stacked on top of each other along the third axis (z) are mechanically connected to each other by one or more third fasteners (36).
  13. 13. The battery pack according to claim 12, wherein at least one third fastener (36) of the one or more third fasteners (36) is arranged in a complementary hole (361, 362) of the frame device (18) of the at least two adjacent stacked battery layers (6), wherein one of the complementary holes (361) of one of the frame devices has a fastener opening (3611) which is accessible from a side (181) of the frame device (18) which is directed away from the frame device (18) in a direction along the first axis (x) or in a direction along the second axis (y).
  14. 14. The battery pack of claim 13, wherein the fastener openings (3611) are disposed in recesses (182) on the side (181).
  15. 15. A vehicle comprising a battery pack (4) according to any one of claims 1 to 14.

Description

Battery pack and vehicle Technical Field The present disclosure relates generally to energy storage systems. In a particular aspect, the present disclosure relates to a battery pack and a vehicle. The present disclosure is applicable to heavy vehicles such as trucks, buses, and construction equipment, as well as other vehicle types. Although the present disclosure may be described with respect to a particular vehicle, the present disclosure is not limited to any particular vehicle. Background The battery pack typically includes a plurality of battery cells, i.e., electrochemical battery cells, electrically connected in series and/or parallel. The battery pack may include one or more individual battery cell stacks or battery modules. The battery cells may be prismatic battery cells or cylindrical battery cells. As a result of trends such as motorization with respect to vehicles, there is a continuing effort to develop improved technologies related to battery packs, such as to provide a more cost-effective configuration that is reliable, robust, and/or space-saving. Disclosure of Invention According to a first aspect of the present disclosure, a battery pack is provided. The battery pack has a first extension along a first axis, a second extension along a second axis, and a third extension along a third axis, wherein the first axis, the second axis, and the third axis are perpendicular. The battery pack includes a battery pack including: A base plate comprising a first support surface facing away from the base plate in a first direction along the third axis, and further comprising a second support surface facing away from the base plate in a second direction opposite to the first direction, A first cell stack layer arranged on the first support surface, A second cell stack layer arranged on the second support surface, A frame means mechanically connected to the base plate and closing the first and second cell stack layers, as shown in a section perpendicular to the third axis, Wherein the first stack layer and the second stack layer each comprise: a plurality of cell stacks, each cell stack comprising a plurality of battery cells stacked together, And wherein the frame means comprises: a pair of sidewalls extending along the first axis, wherein the plurality of cell stacks are located between the pair of sidewalls along the second axis, -A pair of end members extending along the second axis and mechanically connecting the pair of side walls, and wherein the plurality of cell stacks are located between the pair of end members. A first aspect of the present disclosure may seek to provide a reliable, robust and/or space-saving cost-effective battery pack configuration. Technical benefits may include a space-saving and robust packaging of the battery cells along the third axis by arranging the battery cells on opposite sides of the base plate while also protecting the battery cells by the closed frame arrangement. The frame means may be configured to provide structural support for the battery cells along the second and/or first axis. Additionally or alternatively, a frame arrangement may be used to stack multiple battery layers together along a third axis. Thus, by the battery pack configuration as disclosed herein, a flexible and modular configuration may be achieved. Optionally, in some examples, including in at least one preferred example, the plurality of battery cells of the respective battery cell stack are stacked along the second axis, and the plurality of battery cell stacks are arranged along the first axis. Technical benefits may include that any expansion forces from the respective battery cell stacks may be borne by the same structural components (i.e., the pair of sidewalls) of each battery cell stack. This may mean that the battery pack configuration is more rigid, e.g. allowing the battery pack to be longer along the first axis without having a too great negative impact on the rigidity of the battery pack. Optionally, in some examples, including in at least one preferred example, the battery cell may comprise a prismatic battery cell. Additionally or alternatively, the battery cells may comprise cylindrical battery cells. The prismatic battery cell may include a top surface, a bottom surface, and four intermediate sides connecting the top surface and the bottom surface. The prismatic battery cells may be box-shaped. The use of prismatic battery cells stacked in a battery cell stack may result in a battery pack configuration having a high energy density. Optionally, in some examples, including at least one preferred example, the pair of sidewalls are welded to the floor. Technical benefits may include a robust and cost-effective configuration. Optionally, in some examples, including in at least one preferred example, the cell envelope further comprises a cross member extending along the second axis and mechanically connecting the pair of side walls, and wherein the cross member is located between a