Conductive module and battery pack

• US 10,651,450 B2
• Filed: 10/25/2017
• Issued: 05/12/2020
• Est. Priority Date: 11/18/2016
• Status: Active Grant

• Current Assignee: Yazaki Corporation
• Original Assignee: Yazaki Corporation
• Inventors: Okazaki, Yutaro
• Primary Examiner(s): Dignan, Michael L
• Application Number:
  US15/793,915
• Publication Number:
  US 20180145300A1
• Time in Patent Office: 930 Days
• CPC Class Codes: H01M 10/425 Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing printed circuits H05K1/00
• CPC Class Codes: H01M 10/482 for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H01M 10/6554 Rods or plates
• CPC Class Codes: H01M 2200/103 Fuse
• CPC Class Codes: H01M 2220/30 Batteries in portable systems, e.g. mobile phone, laptop
• CPC Class Codes: H01M 50/209 adapted for prismatic or rectangular cells H01M50/216 takes precedence
• CPC Class Codes: H01M 50/264 for cells or batteries, e.g. straps, tie rods or peripheral frames
• 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 50/569 Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals battery terminal connectors with integrated measuring arrangements G01R31/364
• CPC Class Codes: H01M 6/42 Grouping of primary cells into batteries H01M6/40 takes precedence
• CPC Class Codes: H02H 7/18 for batteries; for accumulators
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

A conductive module includes: a first conductive member electrically connected to a battery cell; a second conductive member electrically connecting a battery monitoring unit to the first conductive member; a circuit protection member arranged between the first conductive member and the second conductive member; a first electrical connection structural body; a second electrical connection structural body electrically connecting the second conductive member and the circuit protection member; and a housing member. The second electrical connection structural body includes a linking portion, which is a part that extends in an intersecting direction and physically and electrically connects an electrical connection portion of the second conductive member, and enables the second conductive members of all the conductive modules to be arranged side by side along the intersecting direction. The linking portion is arranged at a position to cause the second conductive member to linearly extend along the arrangement direction.

Claims

1. A conductive module comprising:

a first conductive member that is electrically connected to one of two electrode terminals included in a battery cell being a connection target, the connection target being at least one of a plurality of arranged battery cells;

a second conductive member that has a conductor extending in an arrangement direction of the plurality of battery cells and electrically connects an arithmetic processing device of a battery monitoring unit to the first conductive member, the battery monitoring unit monitoring a battery state of the battery cell;

a circuit protection member that includes a first electrical connection portion electrically connected to an electrical connection portion of the first conductive member, a second electrical connection portion electrically connected to an electrical connection portion of the second conductive member, and a fuse element arranged between the first electrical connection portion and the second electrical connection portion;

a first electrical connection structural body that electrically connects the electrical connection portion of the first conductive member and the first electrical connection portion between the first conductive member and the circuit protection member;

a second electrical connection structural body that electrically connects the electrical connection portion of the second conductive member and the second electrical connection portion between the second conductive member and the circuit protection member; and

a housing member that houses the circuit protection member and the first and second electrical connection structural bodies, as one module, wherein

the second electrical connection structural body includes a linking portion, which is a part that extends in an intersecting direction with respect to the arrangement direction of the plurality of battery cells and physically and electrically connects the electrical connection portion of the second conductive member, and enables the respective second conductive members of all the modules arranged along the arrangement direction with respect to an aggregate formed of the plurality of battery cells to be arranged side by side along the intersecting direction,

the linking portion is arranged at a position to cause the second conductive member of the module to which the linking portion belongs to linearly extend along the arrangement direction of the plurality of battery cells,

the linking portion is arranged at a position protruding from the housing member in a direction orthogonal to a reference plane as viewed in the arrangement direction and extends along the reference plane, the reference plane being a plane along the arrangement direction of the plurality of battery cells and along a wall surface of the aggregate formed of the plurality of battery cells, and

the linking portion has a planar linking surface along the intersecting direction on a protruding direction side thereof with respect to the housing member, and physically and electrically connects the electrical connection portion of the second conductive member of the module provided with the linking portion to the linking surface with the electrical connection portion exposed to an outside.

2. The conductive module according to claim 1, wherein

the second electrical connection structural body includes a relay conductive member including a first linking portion as the linking portion and a second linking portion for physically and electrically connecting the second electrical connection portion.

3. The conductive module according to claim 2, wherein

the second conductive member includes a conductive portion, that includes electrical connection portion of the second conductive member and extends in the arrangement direction of the plurality of battery cells, and an insulating portion with electrical insulating property that covers the conductive portion excluding at least the electrical connection portion of the second conductive member.

4. The conductive module according to claim 1, wherein

the second conductive member includes a conductive portion, that includes electrical connection portion of the second conductive member and extends in the arrangement direction of the plurality of battery cells, and an insulating portion with electrical insulating property that covers the conductive portion excluding at least the electrical connection portion of the second conductive member.

5. A battery pack comprising:

a plurality of arranged battery cells; and

a plurality of conductive modules that electrically connects the battery cell and an arithmetic processing device of a battery monitoring unit monitoring a battery state of the battery cell, wherein

the conductive module includes;

a first conductive member that is electrically connected to one of two electrode terminals included in a battery cell being a connection target, the connection target being at least one of a plurality of arranged battery cells;

a second conductive member that is a conductive member extending in an arrangement direction of the plurality of battery cells and electrically connects the arithmetic processing device to the first conductive member;

a circuit protection member that includes a first electrical connection portion electrically connected to an electrical connection portion of the first conductive member, a second electrical connection portion electrically connected to an electrical connection portion of the second conductive member, and a fuse element arranged between the first electrical connection portion and the second electrical connection portion;

a first electrical connection structural body that electrically connects the electrical connection portion of the first conductive member and the first electrical connection portion between the first conductive member and the circuit protection member;

a second electrical connection structural body that electrically connects the electrical connection portion of the second conductive member and the second electrical connection portion between the second conductive member and the circuit protection member; and

a housing member that houses the circuit protection member and the first and second electrical connection structural bodies,

the second electrical connection structural body includes a linking portion, which is a part that extends in an intersecting direction with respect to the arrangement direction of the plurality of battery cells and physically and electrically connects the electrical connection portion of the second conductive member, and enables the respective second conductive members of all the conductive modules arranged along the arrangement direction with respect to an aggregate formed of the plurality of battery cells to be arranged side by side along the intersecting direction,

the linking portion is arranged at a position to cause the second conductive member of the conductive module to which the linking portion belongs to linearly extend along the arrangement direction of the plurality of battery cells,

the linking portion is arranged at a position protruding from the housing member in a direction orthogonal to a reference plane as viewed in the arrangement direction and extends along the reference plane, the reference plane being a plane along the arrangement direction of the plurality of battery cells and along a wall surface of the aggregate formed of the plurality of battery cells, and

the linking portion has a planar linking surface along the intersecting direction on a protruding direction side thereof with respect to the housing member, and physically and electrically connects the electrical connection portion of the second conductive member of the module provided with the linking portion to the linking surface with the electrical connection portion exposed to an outside.