Battery pack having BMU component damage prevention structure

Patent metadata

Field	Value
Publication number	US-12224408-B2
Application number	US-202017632854-A
Country	US
Kind code	B2
Filing date	Dec 30, 2020
Priority date	Jan 14, 2020
Publication date	Feb 11, 2025
Grant date	Feb 11, 2025

Abstract

Discussed is a battery pack including a structure for reducing damage to a component of a Battery Management Unit (BMU), and more particularly, to a battery pack with a structure that mitigates a concentration of stress caused by external vibration or force on the BMU mounted on a BMU mounting part and facilitates the assembly of the BMU, so that the BMU can be stably fixed to an assembled position to reduce damage to BMU components. The battery pack includes a partition configured to divide cell mounting parts and the BMU mounting part, and the partition have a stress concentration relaxation structure.

First claim

What is claimed is:

1. A battery pack comprising:
two or more battery cells in which a positive terminal and a negative terminal protrude from one outer periphery of each of the battery cells;
a Battery Management Unit (BMU) electrically connected to the positive terminal and the negative terminal of each of the battery cells to control an operation of the battery cells; and
a frame member on which each of the battery cells and the BMU is respectively mounted,
wherein the frame member comprises:
cell mounting parts on which the battery cells are mounted;
a BMU mounting part on which the BMU is mounted; and
a partition configured to divide the cell mounting parts and the BMU mounting part, and the partition having a stress concentration relaxation structure,
wherein the partition is formed to have a slope inclined by a predetermined angle θ in a direction of the cell mounting parts, and the partition is not perpendicular with the cell mounting parts.

2. The battery pack of claim 1 , wherein the cell mounting parts are formed in a frame-shaped structure with an open upper and lower surfaces, and are formed at both ends of the frame member to accommodate the battery cells;
wherein the BMU mounting part has an open top surface, insertingly accommodates the BMU, and is formed between the cell mounting parts;
wherein the partition comprises two or more areas having different heights from a bottom surface of the BMU mounting part.

3. The battery pack of claim 2 , wherein the partition comprises:
a first partition which is an area formed to have a predetermined first height from the bottom surface of the BMU mounting part; and
a second partition formed by extending upward from an upper end portion area of the first partition by a predetermined second height.

4. The battery pack of claim 3 , wherein the second partition is formed as at least two or more second partitions at a predetermined interval on both sides of the upper end portion area of the first partition.

5. The battery pack of claim 3 , further comprising a fixing part for fixing the BMU mounted on the BMU mounting part,
wherein the fixing part is formed on an inner wall facing the BMU mounting part of the second partition.

6. The battery pack of claim 5 , wherein the fixing part comprises:
a protruding part protruding from the second partition by a predetermined length in an inward direction of the BMU mounting part to prevent separation of the BMU mounted on the BMU mounting part; and
a connection support part extending from both sides of the protruding part toward an inner surface of the second partition by the predetermined length in a curved shape and supporting a connection between the second partition and the protruding part.

7. The battery pack of claim 3 , wherein the partition includes a pair of partitions that are parallel to each other,
wherein a first of the pair of partitions includes at least one second section,
wherein a second of the pair of partitions includes at least one second section, and
wherein the at least one second section of the first of the pair of partitions and the at least one second section of the second of the pair of partitions are entirely aligned to face each other.

8. The battery pack of claim 1 , wherein the partition is formed to have a predetermined height as a whole with respect to a bottom surface of the BMU mounting part, and
wherein a hole is formed in a lower region of the partition.

9. The battery pack of claim 8 , wherein the hole is formed as at least two or more holes at predetermined intervals in a length direction of the partition.

10. The battery pack of claim 1 , wherein the stress concentration relaxation structure disperses concentration of stress applied to the BMU by selectively applying stress to local portions of the BMU.

11. A device comprising the battery pack according to claim 1 .

Assignees

• Lg Energy Solution Ltd

Inventors

• Son Hyuk Joon
• Jang Jae Young
• Lee Jin Hyun

Classifications

• 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

• H01M50/204

  Racks, modules or packs for multiple batteries or multiple cells · CPC title

• H01M50/543

  Terminals · CPC title

• H01M50/242 Primary

  adapted for protecting batteries against vibrations, collision impact or swelling · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title