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US-12627010-B2 - Battery pack

US12627010B2US 12627010 B2US12627010 B2US 12627010B2US-12627010-B2

Abstract

A battery pack, includes: a battery cell comprising a main body comprising an electrode assembly, and a terrace part from which electrodes connected to the electrode assembly are drawn out; and a protection module package seated on the terrace part of the battery cell and electrically connected to the battery cell, wherein the protection module package includes: a circuit board includes: a first surface facing the terrace part of the battery cell; a second surface opposite to the first surface; a third surface, which is between the first and second surfaces and faces the main body of the battery cell; and a fourth surface opposite to the third surface and on which a test port is formed; and a connection tab connecting the battery cell to the circuit board.

Inventors

  • Sanghun Park

Assignees

  • SAMSUNG SDI CO., LTD.

Dates

Publication Date
20260512
Application Date
20230104
Priority Date
20220105

Claims (20)

  1. 1 . A battery pack, comprising: a battery cell comprising a main body comprising an electrode assembly, and a terrace part from which electrodes connected to the electrode assembly are drawn out; and a protection module package seated on the terrace part of the battery cell and electrically connected to the battery cell, wherein the protection module package comprises: a circuit board comprising: a first surface facing the terrace part of the battery cell; a second surface opposite to the first surface; a third surface, which is between the first and second surfaces and faces the main body of the battery cell; and a fourth surface opposite to the third surface and on which a test port is formed; and a connection tab connecting the battery cell to the circuit board.
  2. 2 . The battery pack of claim 1 , wherein the first to fourth surfaces of the circuit board extend in a longitudinal direction of the circuit board, and comprise different adjacent surfaces to be in contact with each other.
  3. 3 . The battery pack of claim 1 , wherein the first and second surfaces of the circuit board form main surfaces of the circuit board occupying a first area, and the third and fourth surfaces of the circuit board form side surfaces of the circuit board occupying a second area smaller than the first area.
  4. 4 . The battery pack of claim 1 , wherein the connection tab and a circuit element are mounted on at least one of the first and second surfaces of the circuit board.
  5. 5 . The battery pack of claim 1 , wherein the connection tab is on the second surface of the circuit board and is drawn out from an edge that is in contact with the fourth surface of the circuit board.
  6. 6 . The battery pack of claim 1 , wherein a thickness of the test port formed on the fourth surface of the circuit board is less than a thickness of a circuit element formed on the second surface of the circuit board.
  7. 7 . The battery pack of claim 1 , wherein the test port comprises a metal layer connected to a conductive pattern extending toward the fourth surface of the circuit board, among a plurality of conductive patterns formed on the circuit board.
  8. 8 . The battery pack of claim 1 , wherein the test port comprises a plating layer formed on an end of a conductive pattern that extends toward the fourth surface of the circuit board.
  9. 9 . The battery pack of claim 1 , further comprising an input/output port for input/output of a charging/discharging current of the battery cell with respect to an external device connected to the battery pack, wherein the test port is formed in a shape different from a shape of the input/output port.
  10. 10 . The battery pack of claim 9 , wherein the test port is formed to have a smaller area than an area of the input/output port.
  11. 11 . The battery pack of claim 9 , wherein the input/output port is formed at an end of a flexible wiring that extends from the circuit board in a longitudinal direction of the circuit board.
  12. 12 . The battery pack of claim 11 , wherein a connection area with the circuit board is formed at a first end of the flexible wiring, and the input/output port is formed at a second end of the flexible wiring.
  13. 13 . The battery pack of claim 12 , wherein the connection area is formed on any one of the first and second surfaces of the circuit board.
  14. 14 . The battery pack of claim 1 , wherein the protection module package further comprises an insulating block covering at least one of the first to fourth surfaces of the circuit board.
  15. 15 . The battery pack of claim 14 , wherein the insulating block comprises a side surface formed with a plurality of bridges extending across the fourth surface in a longitudinal direction of the circuit board with long holes therebetween, to cover the first and second surfaces and expose a portion of the fourth surface on which the test port is formed.
  16. 16 . The battery pack of claim 15 , wherein the insulating block comprises first to fourth layers formed on the first to fourth surfaces of the circuit board, respectively.
  17. 17 . The battery pack of claim 16 , wherein the first to third layers of the insulating block entirely cover the first to third surfaces of the circuit board.
  18. 18 . The battery pack of claim 16 , wherein the fourth layer of the insulating block comprises the plurality of bridges connecting the first and second layers of the insulating block to each other.
  19. 19 . The battery pack of claim 18 , wherein the plurality of bridges and the long holes are alternately formed in a longitudinal direction of the circuit board.
  20. 20 . The battery pack of claim 19 , wherein the test port is exposed from the insulating block through the long holes.

Description

CROSS-REFERENCE TO RELATED APPLICATION The present application claims priority to and the benefit of Korean Patent Application No. 10-2022-0001632, filed on Jan. 5, 2022, in the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference. BACKGROUND 1. Field Aspects of one or more embodiments relate to a battery pack. 2. Description of the Related Art In general, secondary batteries are rechargeable (e.g., configured to be repeatedly charged and discharged) unlike non-rechargeable primary batteries. Secondary batteries are used as energy sources of devices, such as mobile devices, electric vehicles, hybrid vehicles, electric bicycles, or uninterruptible power supplies, and depending on the type of an external device using a secondary battery, the secondary battery may be used as a single battery cell or as a module in which a plurality of battery cells are connected to each other to constitute a unit. The above information disclosed in this Background section is only for enhancement of understanding of the background and therefore the information discussed in this Background section does not necessarily constitute prior art. SUMMARY Aspects of some embodiments include a battery pack with sufficient mounting spaces for circuit components, such as connection tabs or circuit elements, and including a test port that enables various purposes, such as inspecting an electrical connection state, checking a normal operation, or measuring a voltage of a battery cell. Additional aspects will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the presented embodiments of the disclosure. According to one or more embodiments, a battery pack includes a battery cell comprising a main body, including an electrode assembly, and a terrace part from which electrodes connected to the electrode assembly are drawn out, and a protection module package seated on the terrace part of the battery cell and electrically connected to the battery cell, wherein the protection module package comprises a circuit board including a first surface facing the terrace part of the battery cell, a second surface opposite to the first surface, a third surface, which is between the first and second surfaces and faces the main body of the battery cell, and a fourth surface opposite to the third surface and on which a test port is formed, and a connection tab connecting the battery cell to the circuit board. According to some embodiments, the first to fourth surfaces of the circuit board may extend in a longitudinal direction of the circuit board, and include different adjacent surfaces to be in contact with each other. According to some embodiments, the first and second surfaces of the circuit board may form main surfaces of the circuit board occupying a relatively large area, and the third and fourth surfaces of the circuit board may form side surfaces of the circuit board occupying a relatively small area. According to some embodiments, the connection tab and a circuit element may mounted on at least one of the first and second surfaces of the circuit board. According to some embodiments, the connection tab may be arranged on the second surface of the circuit board and drawn out from an edge that is in contact with the fourth surface of the circuit board. According to some embodiments, a thickness of the test port formed on the fourth surface of the circuit board may be less than a thickness of the circuit element formed on the second surface of the circuit board. According to some embodiments, the test port may include a metal layer connected to a conductive pattern extending toward the fourth surface of the circuit board, among a plurality of conductive patterns formed on the circuit board. According to some embodiments, the test port may include a plating layer formed on an end of a conductive pattern that extends toward the fourth surface of the circuit board. According to some embodiments, the battery pack may further include an input/output port for input/output of a charging/discharging current of the battery cell with respect to an external device connected to the battery pack, and the test port may be formed in a shape different from a shape of the input/output port. According to some embodiments, the test port may be formed to have a smaller area than an area of the input/output port. According to some embodiments, the input/output port may be formed at an end of a flexible wiring that extends from the circuit board in a longitudinal direction of the circuit board. According to some embodiments, a connection area with the circuit board may be formed at one end of the flexible wiring, and the input/output port may be formed at the other end of the flexible wiring. According to some embodiments, the connection area may be formed on any one of the first and second surfaces of the circuit board. According to some