Battery pack

• US 10,454,282 B2
• Filed: 02/15/2017
• Issued: 10/22/2019
• Est. Priority Date: 03/08/2016
• Status: Active Grant

• Current Assignee: Samsung SDI Company Limited
• Original Assignee: Samsung SDI Company Limited
• Inventors: Cheon, Moonsoo, Kim, Seungil, Park, Gangya
• Primary Examiner(s): Zeng, Lingwen R
• Application Number:
  US15/433,418
• Publication Number:
  US 20170264107A1
• Time in Patent Office: 979 Days
• CPC Class Codes: H01M 10/0422 Cells or battery with cylindrical casing
• 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 10/486 for measuring temperature
• CPC Class Codes: H01M 2220/30 Batteries in portable systems, e.g. mobile phone, laptop
• CPC Class Codes: H01M 50/213 adapted for cells having curved cross-section, e.g. round or elliptic H01M50/209, H01M50/216 take precedence
• CPC Class Codes: H01M 50/503 characterised by the shape of the interconnectors
• CPC Class Codes: H01M 50/509 characterised by the type of connection, e.g. mixed connections
• CPC Class Codes: H01M 50/516 by welding, soldering or brazing
• CPC Class Codes: H01M 50/528 Fixed electrical connections, i.e. not intended for disconnection
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H02J 7/0068 Battery or charger load switching, e.g. concurrent charging and load supply H02J7/0013 takes precedence
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

A battery pack includes at least two battery cells; a circuit board to control charging and discharging operations of the battery cells; and a connection tab electrically connected to the battery cells, extending towards the circuit board, and including a bent portion proximal to the battery cells and located within a battery area defined by the battery cells. A battery pack suitable for a compact type device is provided and a low-resistive design may be applied to the battery pack.

Claims

1. A battery pack comprising:

at least two battery cells;

a circuit board to control charging and discharging operations of the battery cells;

a connection member electrically connecting neighboring battery cells of the at least two battery cells to each other; and

a connection tab electrically connected to the battery cells, the connection tab comprising a first portion extending in a first direction from the connection member towards the circuit board, a bent portion proximal to the battery cells and located within a battery area defined by the battery cells, a second portion extending in a length direction of the battery cells via the bent portion, the length direction of the battery cells being different from the first direction, a connection portion connected to the circuit board, and a lead portion extending between the second portion and the connection portion, wherein the bent portion does not protrude in the first direction beyond a peak point of the battery cells, wherein the first portion of the connection tab extends across a valley region between the neighboring battery cells, and the second portion of the connection tab is located within the valley region, and wherein the lead portion extends diagonally with an inclination angle so as to concurrently follow the first direction and a second direction that is different from the first direction.

2. The battery pack of claim 1, wherein the battery area is a square area including a plurality of battery cell regions connected by the connection member.

3. The battery pack of claim 1, wherein the connection member connects the neighboring battery cells in the first direction in parallel, and connects the neighboring battery cells in the second direction that is different from the first direction in series.

4. The battery pack of claim 1, wherein the connection tab comprises a metal plate formed as an integral body.

5. The battery pack of claim 4, wherein the metal plate is integrally formed with the connection member.

6. The battery pack of claim 1, wherein the connection portion is directly connected to the circuit board.

7. The battery pack of claim 6, wherein the circuit board comprises a connection hole to which the connection portion is inserted.

8. The battery pack of claim 1, wherein the circuit board is located above the battery cells in the first direction.

9. The battery pack of claim 1, wherein the connection member comprises:

a first welding portion and a second welding portion with respect to the battery cells; and

a cut portion crossing between the first welding portion and the second welding portion.

10. The battery pack of claim 1, further comprising a cell holder configured to accommodate the battery cells, wherein an internal surface of the cell holder surrounds the battery cells, and the circuit board is arranged above an external surface of the cell holder.

11. The battery pack of claim 1, wherein the second direction is different from the length direction of the battery cells.