Member for measurement of cell voltage and temperature in battery pack

• US 7,479,786 B2
• Filed: 11/01/2005
• Issued: 01/20/2009
• Est. Priority Date: 11/02/2004
• Status: Active Grant

• Current Assignee: LG Energy Solution Limited (LG Corporation)
• Original Assignee: LG Chem Limited (LG Corporation)
• Inventors: Namgoong, John E., Ahn, Jaesung, Park, JongMin, Jung, Do Yang, Woo, Hyosang
• Primary Examiner(s): Laxton; Gary L
• Assistant Examiner(s): Fantu; Yalkew
• Application Number:
  US11/264,184
• Publication Number:
  US 20060091891A1
• Time in Patent Office: 1,176 Days
• Field of Search: 324/431, 324/426, 307/75, 307/150, 320/154
• US Class Current: 324/431
• CPC Class Codes: B60L 2240/545 Temperature
• CPC Class Codes: B60L 2240/547 Voltage
• CPC Class Codes: B60L 2240/549 Current
• CPC Class Codes: B60L 50/64 Constructional details of batteries specially adapted for electric vehicles
• CPC Class Codes: B60L 58/21 having the same nominal voltage
• CPC Class Codes: G01R 1/04 Housings; Supporting members; Arrangements of terminals
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/0565 Polymeric materials, e.g. gel-type or solid-type
• 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 50/505 comprising a single busbar
• CPC Class Codes: H01M 50/569 Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals battery terminal connectors with integrated measuring arrangements G01R31/364
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

A member for measurement of cell voltage and temperature in a battery pack comprises temperature measuring elements (a) attached to the surfaces of unit cells, and a printed circuit board (b) having protrusions formed at the upper end thereof such that the protrusions are connected to electrode lead connection members that connect electrode leads of the unit cells, connection parts formed at the lower part thereof for allowing the temperature measuring elements to be attached to the printed circuit board, and a circuit through which electric current for voltage measurement of the unit cells and electric current for temperature measurement of the temperature measuring elements flow.

Claims

1. A member for measurement of cell voltage and temperature in a battery pack, comprising:

temperature measuring elements (a) adapted for being attached to the surfaces of unit cells of the battery pack, wherein each of the temperature measuring elements comprise a sensing body coupled to connection feet; and

a printed circuit board (b) having protrusions formed at an upper end thereof such that the protrusions are suited for connecting to electrode lead connection members that connect electrode leads of the unit cells, the electrode lead connection members being bus bars connecting the electrode leads, the printed circuit board comprising connection parts formed at a lower part thereof for connecting the temperature measuring elements to the printed circuit board, and a circuit for transmitting electric current for voltage measurement of the unit cells and electric current for temperature measurement of the temperature measuring elements;

wherein attachment of the voltage and temperature measuring member to the battery pack is accomplished by attaching the protrusion of the voltage and temperature measuring member to the bus bars of the battery pack such that temperature measuring elements are located on the unit cells of the battery pack.

2. The member as set forth in claim 1, wherein each of the temperature measuring elements is a thermistor, the resistance of which is changed according to the temperature.

3. The member as set forth in claim 1, wherein the protrusions are fixed to the electrode lead connection members by soldering.

4. The member as set forth in claim 1, wherein each of the connection parts has through-holes, through which two connection feet of each of the temperature measuring elements are inserted, the connection feet of each of the temperature measuring elements being fixed to the printed circuit board by soldering while the connection feet of each of the temperature measuring elements are inserted in the through-holes.

5. The member as set forth in claim 1, wherein the printed circuit board is provided at one end thereof with a connector, which is adapted for connection to a battery management system (BMS), at which a voltage measuring device and a temperature measuring device are mounted.

6. The member as set forth in claim 1, wherein the printed circuit board is adapted for connection to the electric connection members without an additional wire.

7. The member as set forth in claim 1, wherein the units cells comprise at least one of square-shaped cells and pouch-shaped cells.

8. The member as set forth in claim 1, wherein the units cells comprise rechargeable cells.