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JP-2026075238-A - Bassba

JP2026075238AJP 2026075238 AJP2026075238 AJP 2026075238AJP-2026075238-A

Abstract

[Problem] To provide a bus bar that can alleviate stress concentration when multiple slits are provided. [Solution] The busbar 1 comprises a plate-shaped conductor 2 that connects the electrodes of two battery cells, the conductor having two fixing parts 23 fixed to the electrodes of different battery cells respectively, and a plurality of slits 3 extending in a first direction D1, the plurality of slits being arranged along a second direction D2 perpendicular to the first direction, one fixing part being located on one side of the plurality of slits in the first direction, and another fixing part being located on the other side of the plurality of slits in the first direction, the plurality of slits including a first slit 31 and a second slit 32 located further away from the first slit than the imaginary line IL connecting the two fixing parts, the length L2 of the second slit along the first direction being greater than the length L1 of the first slit along the first direction. [Selection Diagram] Figure 2

Inventors

  • 中川 真理子
  • 雄鹿 達也
  • 佐藤 勝則
  • 望月 星吾

Assignees

  • 矢崎総業株式会社

Dates

Publication Date
20260508
Application Date
20241022

Claims (5)

  1. It includes a plate-shaped conductor that connects the electrodes of two battery cells, The conductor has two fixing portions that are fixed to the electrodes of different battery cells, and a plurality of slits that extend in the first direction. The multiple slits are arranged along a second direction perpendicular to the first direction, One of the fixing parts is positioned on one side in the first direction relative to the plurality of slits. Another fixing portion is positioned on the other side in the first direction relative to the plurality of slits. The plurality of slits include a first slit and a second slit located further away from the first slit than the imaginary line connecting the two fixing parts, A bus bar characterized in that the length of the second slit along the first direction is greater than the length of the first slit along the first direction.
  2. The bus bar according to claim 1, wherein both ends of the second slit protrude in the first direction relative to the first slit.
  3. The bus bar according to claim 1, wherein the second slit is located at the position furthest from the imaginary line among the plurality of slits.
  4. The conductor has two flat end regions positioned at both ends in the first direction, and an intermediate region between the two end regions. The intermediate region is bent so as to protrude from the end region in a third direction that is perpendicular to both the first and second directions. One of the fixing parts is located in one of the end regions, and the other fixing part is located in the other end region. The bus bar according to claim 1, wherein each of the plurality of slits extends from one end region through the intermediate region to another end region.
  5. Multiple slits form multiple beams extending in the first direction in the conductive material. The plurality of beams have beams at the ends in the second direction, The end beam is formed between the second slit and the edge of the conductor and is longer than the other beams, according to claim 1.

Description

This invention relates to a bass guitar. Conventionally, there are busbars used to connect different components. Patent Document 1 discloses a busbar for connecting multiple terminals, in which multiple slits extending in the longitudinal direction of the busbar are arranged in the width direction of the busbar, perpendicular to the longitudinal direction. Patent Document 2 discloses a battery module having a busbar. In this battery module, the busbar has a connection portion connected to the external terminal of one battery cell and another connection portion connected to the external terminal of another battery cell. Between the two connection portions, a weak portion is positioned where the compressive strength in the direction in which the battery cells are stacked is less than that of the connection portion. Japanese Patent Publication No. 2022-007032Japanese Patent Publication No. 2017-216095 Figure 1 is a plan view of the busbar and battery pack according to an embodiment.Figure 2 is a plan view of the busbar according to the embodiment.Figure 3 is a perspective view of the busbar according to this embodiment.Figure 4 is a plan view of the busbar according to the embodiment.Figure 5 is a plan view of a busbar according to a comparative example.Figure 6 is a plan view of another busbar according to the embodiment.Figure 7 is a plan view of another busbar according to the embodiment.Figure 8 is a plan view of another busbar according to the embodiment. The following describes in detail, with reference to the drawings, a busbar according to an embodiment of the present invention. However, this embodiment does not limit the present invention. Furthermore, the components in the following embodiments include those that are readily conceivable to those skilled in the art or that are substantially identical. [Embodiment] An embodiment will be described with reference to Figures 1 to 8. This embodiment relates to a busbar. Figure 1 is a plan view of a busbar and battery pack according to the embodiment, Figure 2 is a plan view of a busbar according to the embodiment, Figure 3 is a perspective view of a busbar according to the embodiment, Figure 4 is a plan view of a busbar according to the embodiment, Figure 5 is a plan view of a busbar according to a comparative example, and Figures 6 to 8 are plan views of other busbars according to the embodiment. As shown in Figure 1, the busbar 1 in this embodiment is a conductive member that connects the electrodes 120 of two adjacent battery cells 110 to each other. The illustrated battery cells 110 constitute a battery pack 100 mounted on a vehicle. The battery pack 100 is the power source of the vehicle and is mounted on electric vehicles (BEVs), hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (PHEVs), etc. The battery pack 100 has a plurality of battery cells 110 arranged in a line along the arrangement direction Ex. The battery pack 100 may have a plurality of battery modules, each composed of a plurality of battery cells 110. The busbar 1 connects the electrode 120 of one of two adjacent battery cells 110 to the electrode 120 of the other battery cell 110. As shown in Figures 1 to 3, the busbar 1 has a plate-shaped conductor 2. The conductor 2 electrically connects the electrodes 120 of the two battery cells 110. The conductor 2 is formed, for example, from a conductive metal plate. The busbar 1 may also have other elements in addition to the conductor 2. For example, the busbar 1 may have a terminal portion to which a detection line for detecting voltage is connected. The conductor 2, as illustrated, has a rectangular shape in plan view. The conductor 2 has two fixing portions 23. The fixing portions 23 are the parts that are fixed to the electrodes 120 of the battery cell 110. The fixing portions 23 are fixed to the electrodes 120 by welding, such as laser welding. Each fixing portion 23 has a welding range 24 as shown in Figure 2. At least a portion of the welding range 24 is welded to the electrodes 120 and fixed to the electrodes 120. The fixing portion 23 of this embodiment has a through hole 23a. The through hole 23a penetrates the conductor 2 along the thickness direction of the conductor 2. The illustrated shape of the through hole 23a is circular. The position of the through hole 23a is, for example, the center of the fixing portion 23. The illustrated welding area 24 is set surrounding the through hole 23a. The illustrated shape of the welding area 24 is an oval concentric with the through hole 23a. Note that the shape of the through hole 23a is not limited to a circle. Also, the fixing portion 23 does not necessarily have a through hole 23a. The two fixing portions 23 are spaced apart. The spacing between the two fixing portions 23 is determined, for example, according to the relative positions of two adjacent electrodes 120. As shown in Figure 2, the conductor 2 has a first direction D1 and a second direction D2. The first direction