CN-116454551-B - Joint structure of component, battery module and battery pack

Abstract

The present invention relates to a joining structure of members, a battery module, and a battery pack, wherein the joining structure of members includes a1 st member (110), and a plate-shaped 2 nd member (300) including an overlapping portion (310) overlapping the 1 st member (110), and a protruding portion (320) protruding from the overlapping portion (310) in the 1 st direction. A joint (10) is formed in the overlapping portion (310) where the 1 st member (110) and the 2 nd member (300) are joined by welding or fusing. The joint (10) includes a cutout (10C) on the opposite side of the protruding portion (320).

Inventors

• JI TIANJING
• TANAKA TOMOYUKI

Assignees

• 泰星能源解决方案有限公司

Dates

Publication Date

20260505

Application Date

20230109

Priority Date

20220117

Claims (7)

1. 1. A joining structure for members is characterized by comprising: part 1, and A plate-like 2 nd member including an overlapping portion overlapping the 1 st member and a protruding portion protruding from the overlapping portion in the 1 st direction, Forming a joint portion where the 1 st member and the 2 nd member are joined by welding or welding at the overlapping portion, The engagement portion includes a cutout portion on an opposite side with respect to the protruding portion, A hole portion is formed in the 2 nd member located on the opposite side of the protruding portion from the joint portion, and the notch portion is formed in the joint portion so as to avoid the hole portion.
2. 2. The joining structure of components according to claim 1, wherein, The area of the region surrounded by the cutout portion is smaller than the area of the joint portion.
3. 3. The joining structure of components according to claim 1 or 2, wherein, The entire width D1 of the joint portion along the 2 nd direction orthogonal to the 1 st direction is 2 to 6 times the width D2 of the cutout portion along the 2 nd direction.
4. 4. The joining structure of components according to claim 1 or 2, wherein, The difference H1-H2 between the entire width H1 of the joint portion and the width H2 of the cutout portion along the 1 st direction is 1.4 times to 4 times the plate thickness T of the 2 nd member.
5. 5. The joining structure of components according to claim 1 or 2, wherein, The joint is formed in a substantially C-shape.
6. 6. A battery module, comprising: A single cell including the electrode terminal as the 1 st member, and As the bus bar of the 2 nd component, The battery module includes the joining structure of the member according to any one of claims 1 to 5 as the joining structure of the electrode terminal and the bus bar.
7. 7. A battery pack, characterized in that, The battery module according to claim 6, comprising a case and the battery module stored in the case.

Description

Joint structure of component, battery module and battery pack Technical Field The present technology relates to a joining structure of components, a battery module, and a battery pack. Background Conventionally, a plurality of members are stacked and joined by welding or the like. Examples of conventional lap joint structures include those described in Japanese patent application laid-open No. 2017/131186, japanese patent application laid-open No. 2010-158717, and Japanese patent application laid-open No. 2002-079387. From the viewpoint of increasing the joining strength, there is a demand for increasing the area of the joined portion by welding or welding. On the other hand, there is a demand for minimizing the area of the joint portion in view of the concern that the heat influence (heat accumulation) for welding or deposition may cause joint failure such as cracking. From the standpoint of satisfying the above contradictory 2 requirements, it cannot be said that the conventional lap joint structure is necessarily sufficient. Disclosure of Invention The present technology aims to provide a joint structure of components, a battery module and a battery pack, wherein the joint strength is ensured and the thermal influence during joint is reduced. The joining structure of members according to the present technology includes a1 st member and a plate-like 2 nd member including an overlapping portion overlapping the 1 st member and a protruding portion protruding from the overlapping portion in the 1 st direction. A joint is formed at the overlapping portion between the 1 st member and the 2 nd member by welding or welding. The engaging portion includes a cutout portion located on an opposite side with respect to the protruding portion. The battery module according to the present technology includes a single cell including an electrode terminal as a1 st member, and a bus bar as a2 nd member, and includes the above-described joining structure of the members as a joining structure of the electrode terminal and the bus bar. The battery pack according to the present technology includes a case and the battery module described above housed in the case. The above and other objects, features, aspects and advantages of the present invention will become apparent from the following detailed description of the present invention, which is to be read in connection with the accompanying drawings. Drawings Fig. 1 is a perspective view showing a single cell. Fig. 2 is an external view of a case housing a battery module including a single cell. Fig. 3 is a perspective view showing the inside of the housing. Fig. 4 is a plan view showing the inside of the case. Fig. 5 is a perspective view showing a joint structure of an electrode terminal and a bus bar. Fig. 6 is a diagram showing a positional relationship between the joint and the force point (first). Fig. 7 is a diagram showing a positional relationship between the joint and the force point (second). Fig. 8 is a diagram showing a positional relationship between the joint and the force point (third). Fig. 9 is a diagram showing a positional relationship between the joint and the force point (fourth). Fig. 10 is a diagram showing a positional relationship between the joint and the force point (fifth). Fig. 11 is a view (first) for explaining the shape of the joint. Fig. 12 is a diagram (second) for explaining the shape of the joint. Detailed Description Hereinafter, embodiments of the present technology will be described. The same or corresponding portions are denoted by the same reference numerals, and description thereof may not be repeated. In the embodiments described below, when the number, the amount, and the like are mentioned, the scope of the present technology is not necessarily limited to the number, the amount, and the like unless otherwise specifically described. In the following embodiments, each component is not necessarily essential to the present technology unless otherwise described. The present technology is not limited to the operation and effects described in the present embodiment. In the present specification, the terms "include" and "have" are open-ended. That is, when a certain structure is included, other structures than the certain structure may be included, or other structures than the certain structure may not be included. In addition, in this specification, when geometric terms and terms indicating a positional/directional relationship such as "parallel", "orthogonal", "45 °", "coaxial", "along", and the like are used, these terms allow for manufacturing errors or slight variations. In the present specification, when terms indicating a relative positional relationship such as "upper side", "lower side", etc. are used, these terms are used as terms indicating a relative positional relationship in 1 state, and the relative positional relationship can be reversed or rotated by an arbitrary angle depending on the installation direction of each mechanism