Battery pack

Patent metadata

Field	Value
Publication number	US-12525658-B2
Application number	US-202218056258-A
Country	US
Kind code	B2
Filing date	Nov 17, 2022
Priority date	Nov 29, 2021
Publication date	Jan 13, 2026
Grant date	Jan 13, 2026

Abstract

A controller makes it possible to more securely execute, when a thermal runaway occurs in a battery pack, communications for a fail-safe action with an external device. A controller is configured to execute, when a thermal runaway occurs in a battery pack, communications for a fail-safe action with an external device. A first battery module is arranged on a side farther than the controller in a first direction. A second battery module is arranged on a side farther than the controller in a second direction that is a direction opposite to the first direction. A first wire extends from the controller in the first direction and passes immediately above the first battery module. A second wire extends from the controller in the second direction and passes immediately above the second battery module, and has a function identical to a function of the first wire in the communications.

First claim

What is claimed is:

1 . An on-vehicle battery pack to be mounted on a vehicle, the battery pack comprising:
a controller configured to execute, when a thermal runaway occurs in the battery pack, communications for a fail-safe action with an external device that is present outside the battery pack; a first battery module arranged, in the battery pack, on a side farther than the controller in a first direction; a second battery module arranged, in the battery pack, on a side farther than the controller in a second direction, the second direction being a direction opposite to the first direction; a first wire extending from the controller in the first direction and passing immediately above the first battery module; and a second wire extending from the controller in the second direction and passing immediately above the second battery module, the second wire having a function identical to a function of the first wire in the communications, wherein the first wire and the second wire ensure redundancy of the functions in the communications.

2 . The battery pack according to claim 1 ,
wherein the first direction and the second direction correspond to vehicle width directions of the vehicle, further comprising an accommodating body accommodating the controller, the first battery module, the second battery module, the first wire, and the second wire, wherein the accommodating body has, on a lower surface, a recess that recesses upward and extends in vehicle length directions of the vehicle, the controller is present above the recess, at least a part of the controller is present higher than upper ends of the first battery module and the second battery module, the first wire is coupled to the controller at a position higher than the upper end of the first battery module, and the second wire is coupled to the controller at a position higher than the upper end of the second battery module.

3 . The battery pack according to claim 1 , further comprising a plate body that is present immediately above the battery modules,
the plate body extending in horizontal directions, the plate body being incombustible, the plate body having an opening that vertically passes therethrough, wherein at least either of the first wire and the second wire passes through the opening and is arranged immediately above the plate body.

4 . The battery pack according to claim 3 , wherein
the first wire and the second wire serve as ground lines coupled to a ground side in a circuit in the controller, the first wire passes through the opening and is coupled to a first ground terminal that is present on the plate body, and the second wire is coupled to a second ground terminal that is present lower than the plate body.

5 . The battery pack according to claim 3 , wherein
the first wire and the second wire serve as positive electrode side wires in communication wires sending electric signals or positive electrode side wires in power supply wires supplying electric power to the controller, the first wire extends, below the plate body, from the controller in the first direction and is coupled to a terminal that is present on the side farther than the first battery module in the first direction, the plate body has, as the opening, a first opening and a second opening, the second opening being present on the side farther than the first opening in the second direction, and the second wire passes through the second opening, extends immediately above the plate body in the first direction, passes through the first opening, and is coupled to the terminal that is present on the side farther than the first battery module in the first direction.

6 . An on-vehicle battery pack to be mounted on a vehicle, the battery pack comprising:
a controller configured to execute, when a thermal runaway occurs in the battery pack, communications for a fail-safe action with an external device that is present outside the battery pack; a first battery module arranged, in the battery pack, on a side farther than the controller in a first direction; a second battery module arranged, in the battery pack, on a side farther than the controller in a second direction, the second direction being a direction opposite to the first direction; a first wire extending from the controller in the first direction and passing immediately above the first battery module; a second wire extending from the controller in the second direction and passing immediately above the second battery module, the second wire having a function identical to a function of the first wire in the communications; and a plate body present immediately above the battery modules, extending in horizontal directions, and being incombustible, wherein the plate body has an opening that vertically passes therethrough, the first wire and the second wire serve as ground lines coupled to a ground side in a circuit in the controller, the first wire passes through the opening and is coupled to a first ground terminal that is present on the plate body, and the second wire is coupled to a second ground terminal that is present lower than the plate body.

7 . An on-vehicle battery pack to be mounted on a vehicle, the battery pack comprising:
a controller configured to execute, when a thermal runaway occurs in the battery pack, communications for a fail-safe action with an external device that is present outside the battery pack; a first battery module arranged, in the battery pack, on a side farther than the controller in a first direction; a second battery module arranged, in the battery pack, on a side farther than the controller in a second direction, the second direction being a direction opposite to the first direction; a first wire extending from the controller in the first direction and passing immediately above the first battery module; a second wire extending from the controller in the second direction and passing immediately above the second battery module, the second wire having a function identical to a function of the first wire in the communications; and a plate body present immediately above the battery modules, extending in horizontal directions, and being incombustible, wherein the plate body has an opening that vertically passes therethrough, the first wire and the second wire serve as positive electrode side wires in communication wires sending electric signals or positive electrode side wires in power supply wires supplying electric power to the controller, the first wire extends, below the plate body, from the controller in the first direction and is coupled to a terminal that is present on the side farther than the first battery module in the first direction, the plate body has, as the opening, a first opening and a second opening, the second opening being present on the side farther than the first opening in the second direction, and the second wire passes through the second opening, extends immediately above the plate body in the first direction, passes through the first opening, and is coupled to the terminal that is present on the side farther than the first battery module in the first direction.

Assignees

• Honda Motor Co Ltd

Inventors

• Yang Aibei
• Iijima Takaaki
• Itaya Hiroki
• Shimazaki Itsuki

Classifications

• H01M50/581

  in response to temperature · CPC title

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• H01M2010/4278

  Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller · CPC title

• H01M10/4257 Primary

  Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries · CPC title

• H01M2010/4271

  Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing · CPC title