US-12626984-B2 - Battery pack for vehicle

US12626984B2US 12626984 B2US12626984 B2US 12626984B2US-12626984-B2

Abstract

An embodiment battery pack for a vehicle includes a plurality of battery modules disposed in a casing, a casing member provided in the casing to secure rigidity of the casing, and a wiring assembly disposed in the casing member. Another embodiment battery pack for a vehicle includes a plurality of battery modules arranged flatly, a casing surrounding a bottom and lateral sides of the battery modules, a casing member provided lengthwise in the casing along an arranged direction of the battery modules, and a wiring assembly provided in a space defined by a recessed portion recessed inward in a cross-sectional view of the casing member.

Inventors

Kang Won LEE
Jeong Hun SEO
In Gook Son

Assignees

HYUNDAI MOTOR COMPANY
KIA CORPORATION

Dates

Publication Date: 20260512
Application Date: 20220725
Priority Date: 20211008

Claims (14)

1 . A battery pack for a vehicle, the battery pack comprising: a casing; a plurality of battery modules disposed in the casing; a casing member provided in the casing to secure rigidity of the casing; and a wiring assembly disposed in the casing member, wherein the casing member is disposed to longitudinally cross an inside of the casing, and wherein the wiring assembly is connected to a front connector, which is connected to an outside, through a first end of the casing member, and is connected to a power relay assembly through a second end of the casing member.
2 . The battery pack of claim 1 , wherein: the battery modules are arranged flatly in a single layer; and the casing member is rectilinearly disposed in a direction parallel to a plane formed by the battery modules and provided with a space to receive the wiring assembly.
3 . The battery pack of claim 1 , wherein the wiring assembly disposed in the casing member is connected to a fuse mounted to a front of the casing through the first end of the casing member.
4 . The battery pack of claim 2 , wherein: the casing member has a structure in which lateral sides are parallel to the battery modules and a bottom side is open to define an open region in a cross-sectional view; and the wiring assembly is provided in the open region.
5 . The battery pack of claim 4 , wherein the wiring assembly is provided in the space defined by the open region of the casing member and a mid-plate supporting a bottom of the battery modules.
6 . The battery pack of claim 2 , wherein: the casing member comprises lateral grooves at lateral sides thereof facing toward the battery modules; and the wiring assembly is provided in the lateral grooves of the casing member.
7 . The battery pack of claim 6 , wherein the wiring assembly is provided in the space defined by the lateral grooves of the casing member and the battery modules.
8 . A method of forming a battery pack for a vehicle, the method comprising: disposing a plurality of battery modules in a casing; disposing a casing member in the casing to secure rigidity of the casing; and disposing a wiring assembly in the casing member wherein the casing member is disposed to longitudinally cross an inside of the casing, and wherein the wiring assembly is connected to a front connector, which is connected to an outside, through a first end of the casing member, and is connected to a power relay assembly through a second end of the casing member.
9 . The method of claim 8 , wherein: the battery modules are arranged flatly in a single layer; and the casing member is rectilinearly disposed in a direction parallel to a plane formed by the battery modules and provided with a space to receive the wiring assembly.
10 . The method of claim 9 , wherein the wiring assembly is connected to a fuse mounted to a front of the casing through the first end of the casing member.
11 . The method of claim 9 , wherein: the casing member has a structure in which lateral sides are parallel to the battery modules and a bottom side is open to define an open region in a cross-sectional view; and the wiring assembly is provided in the open region.
12 . The method of claim 11 , wherein the wiring assembly is provided in the space defined by the open region of the casing member and a mid-plate supporting a bottom of the battery modules.
13 . The method of claim 9 , wherein: the casing member comprises lateral grooves at lateral sides thereof facing toward the battery modules; and the wiring assembly is provided in the lateral grooves of the casing member.
14 . The method of claim 13 , wherein the wiring assembly is provided in the space defined by the lateral grooves of the casing member and the battery modules.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application claims the benefit of Korean Patent Application No. 10-2021-0133559, filed on Oct. 8, 2021, which application is hereby incorporated herein by reference. TECHNICAL FIELD The disclosure relates to a battery pack for a vehicle. BACKGROUND An electric vehicle or a hybrid vehicle is provided with a high-voltage battery to supply the power needed for the vehicle. The high-voltage battery is mounted to the vehicle in various forms, and mounted to a lower side of the vehicle in the form of a battery pack. The battery pack includes a plurality of battery modules, and each battery module includes a plurality of battery cells. The battery pack includes a bus bar for electrically connecting the battery modules. Sensing wirings for sensing the voltage, current, temperature, etc. of the battery module are installed. Hereinafter, a conductor, an electric wire, or a combination thereof for forming the electrical connection in the battery pack like the bus bar, the sensing wiring, etc. will be collectively called a ‘wiring assembly.’ Matters described as the related art are provided merely for promoting understanding for the background of the disclosure, and should not be taken as the prior art already known to a person having ordinary knowledge in the art. SUMMARY The disclosure relates to a battery pack for a vehicle. Particular embodiments relate to a wiring technology for a battery pack mounted to a vehicle. Therefore, embodiments of the disclosure have been made in view of problems in the art, and an embodiment of the disclosure provides a battery pack for a vehicle, in which a wiring assembly for forming electrical connection inside the battery pack to be mounted to the vehicle is arranged with higher spatial efficiency and thus does not wastefully occupy an inner space of the battery pack, so that the number of battery modules to be loaded can be increased or the volume of the battery pack can be reduced, thereby achieving a more compact battery pack. According to one embodiment of the disclosure, a battery pack for a vehicle includes a casing accommodating a plurality of battery modules, a casing member provided in the casing to secure rigidity of the casing, and a wiring assembly placed inside the casing member. The battery modules in the casing may be arranged flatly to form a single layer, and the casing member may be rectilinearly disposed in a direction parallel to a plane formed by the battery modules, and includes a space to place the wiring assembly therein. The casing member may be disposed to cross an inside of the casing longitudinally, and the wiring assembly placed inside the casing member may be connected to a front connector, which is connected to outside, through a first end of the casing member and is connected to a power-relay assembly through a second end of the casing member. The wiring assembly placed inside the casing member may be connected to a fuse mounted to a front of the casing through the first end of the casing member. The casing member may be configured in a structure of a cross-section where lateral sides are parallel to the battery modules and a bottom side is opened, and the wiring assembly may be inserted in the opened cross-section. The wiring assembly may be inserted in a space formed by the bottom-opened cross-section of the casing member and a mid-plate supporting the bottom of the battery module. The casing member may be formed with lateral grooves at lateral sides thereof facing toward the battery modules, and the wiring assembly may be inserted in the lateral groove of the casing member. The wiring assembly may be inserted in a space formed by the lateral groove of the casing member and the battery module. Further, according to another embodiment of the disclosure, a battery pack for a vehicle includes a plurality of battery modules arranged flatly, a casing surrounding a bottom and lateral sides of the battery module, a casing member provided lengthwise in the casing along an arranged direction of the battery modules, and a wiring assembly inserted in a space formed by a recessed portion recessed inward in a cross-section of the casing member. The recessed portion of the casing member may be opened toward the bottom of the casing, and the wiring assembly may be disposed to be constrained in a space formed by a bottom-recessed portion of the casing member and a mid-plate of the casing. The recessed portion of the casing member may be opened in lateral directions of the casing, and the wiring assembly may be disposed to be constrained in a space formed by the lateral recessed portion of the casing member and the battery module. The casing member may be disposed lengthwise in the casing in a longitudinal direction, and the wiring assembly may be connected to a front connector, which is connected to outside, through a first end of the casing member and is connected to a power relay assembly through a second end of the ca