Connecting structure for bus bar and electrical wire

• US 9,806,441 B2
• Filed: 03/12/2015
• Issued: 10/31/2017
• Est. Priority Date: 09/19/2012
• Status: Active Grant

• Current Assignee: Yazaki Corporation
• Original Assignee: Yazaki Corporation
• Inventors: Yoshioka, Nobuaki, Suzuki, Keigo
• Primary Examiner(s): Patel, Harshad C
• Application Number:
  US14/645,586
• Publication Number:
  US 20150188244A1
• Time in Patent Office: 964 Days
• Field of Search: 439442, 439877, 439887, 439882, 439879
• CPC Class Codes: H01M 50/50 Current conducting connections for cells or batteries
• CPC Class Codes: H01M 50/503 characterised by the shape of the interconnectors
• CPC Class Codes: H01M 50/571 Methods or arrangements for affording protection against corrosion; Selection of materials therefor
• CPC Class Codes: H01R 11/05 the connecting locations having different types of direct connections
• CPC Class Codes: H01R 11/11 End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member H01R11/01 takes precedence
• CPC Class Codes: H01R 4/182 for flat conductive elements, e.g. flat cables H01R4/01 takes precedence
• CPC Class Codes: H01R 4/184 comprising a U-shaped wire-receiving portion
• CPC Class Codes: H01R 4/185 combined with a U-shaped insulation-receiving portion
• CPC Class Codes: H01R 4/188 having an uneven wire-receiving surface to improve the contact
• CPC Class Codes: H01R 4/62 Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors H01R4/68 takes precedence
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A connecting structure uses a crimp terminal to connect a bus bar and an electrical wire together. The crimp terminal includes a bus bar-connecting section to be crimped to the bus bar, and an electrical wire-connecting section to be crimped to an end of the electrical wire. At least one of the bus bar-connecting section and the electrical wire-connecting section is provided with an oxide film breaking means for breaking an oxide film on the bus bar or a core wire on the end of the electrical wire.

Claims

1. A connecting structure for a bus bar and an electrical wire, comprising:

a bus bar comprising a bus bar body and a bus bar crimp portion protruding from the bus bar body;

an electrical wire that includes a core wire, and a coating portion coating an outer periphery of the core wire; and

a crimp terminal,

wherein

the crimp terminal includes a bus bar-connecting section to be crimped to the bus bar crimp portion of the bus bar, an electrical wire-connecting section to be crimped to an end of the electrical wire, and a linking portion that is provided between the bus bar-connecting section and the electrical wire-connecting section in an axial direction of the electrical wire,

the bus bar-connecting section, the linking portion, and the electrical wire-connecting section are arranged in a straight line along the axial direction of the electrical wire,

a width of the linking portion is smaller than that of the bus bar-connecting section,

the width of the linking portion is smaller than that of the electrical wire-connecting section,

the bus bar-connecting section is provided with an oxide film breaking portion configured to break an oxide film on the bus bar crimp portion,

the electrical wire-connecting section of the crimp terminal comprises a core wire crimp portion provided on a bus bar-connecting section side of the electrical wire-connecting section where the electrical wire-connecting section is adjacent to the linking portion,

the bus bar-connecting section includes a first side and a second side,

the core wire crimp portion includes a first side and a second side,

the first side and the second side of the bus bar-connecting section and the first side and the second side of the core wire crimp portion are arranged in an order of the first side of the bus bar-connecting section, the second side of the bus bar-connecting section, the first side of the core wire crimp portion, and the second side of the core wire crimp portion, along the axial direction of the electrical wire,

the linking portion is provided between the second side of the bus bar-connecting section and the first side of the core wire crimp portion,

the bus bar crimp portion of the bus bar extends in the bus bar-connecting section no further than the second side of the bus bar-connecting section, and

the core wire extends in the core wire crimp portion no further than the first side of the core wire crimp portion.

2. The connecting structure for the bus bar and the electrical wire, according to claim 1, wherein

the electrical wire includes the core wire, and a coating portion coating an outer periphery of the core wire,

the electrical wire-connecting section of the crimp terminal further comprises a coating clamping portion provided on the opposite side from the bus bar-connecting section, and

the oxide film breaking portion comprises a serration formed on the bus bar-connecting section.

3. The connecting structure for the bus bar and the electrical wire, according to claim 2, wherein the serration or a plurality of ridges configured to restrain an axial misalignment of the core wire and thereby retain the core wire, are formed on the core wire crimp portion of the crimp terminal.

4. The connecting structure for the bus bar and the electrical wire, according to claim 1, wherein

the oxide film breaking portion extends continuously along the axial direction of the crimped electrical wire.

5. The connecting structure for the bus bar and the electrical wire, according to claim 1, wherein

the oxide film breaking portion comprises rectangular grooves arranged in a grid pattern.

6. The connecting structure for the bus bar and the electrical wire, according to claim 1, wherein

the bus bar is formed of an aluminum material or an copper material.

7. The connecting structure for the bus bar and the electrical wire, according to claim 1, wherein

the crimp terminal is made of stainless steel or spring steel.

8. The connecting structure for the bus bar and the electrical wire, according to claim 1, wherein

the bus bar body of the bus bar has a flat plate shape and the bus bar crimp portion of the bus bar has a shape of the plate protruding from the bus bar body,

the bus bar body is formed with a through hole through which an electrode or a terminal is to be passed.

9. The connecting structure for the bus bar and the electrical wire, according to claim 1, wherein

the electrical wire-connecting section is provided with an oxide film breaking portion configured to break an oxide film on a core wire of the electrical wire, such that the both of the electrical wire-connecting section and the bus bar-connecting section are provided with the oxide film breaking portions.

10. The connecting structure for the bus bar and the electrical wire, according to claim 9, wherein

the bus bar and the core wire of the electrical wire are made of aluminum material.