US 12,237,481 B2
Battery pack having a film thermistor and a dip thermistor
Kohei Nakatani, Anjo (JP); Kazuya Tanaka, Anjo (JP); and Hiroki Uesugi, Anjo (JP)
Assigned to MAKITA CORPORATION, Anjo (JP)
Appl. No. 17/297,279
Filed by MAKITA CORPORATION, Anjo (JP)
PCT Filed Nov. 7, 2019, PCT No. PCT/JP2019/043746
§ 371(c)(1), (2) Date May 26, 2021,
PCT Pub. No. WO2020/110655, PCT Pub. Date Jun. 4, 2020.
Claims priority of application No. 2018-225408 (JP), filed on Nov. 30, 2018.
Prior Publication US 2022/0029214 A1, Jan. 27, 2022
Prior Publication US 2022/0359921 A9, Nov. 10, 2022
Int. Cl. H01M 10/48 (2006.01); H01M 10/42 (2006.01); H01M 10/613 (2014.01); H01M 10/6235 (2014.01); H01M 10/643 (2014.01); H01M 10/6563 (2014.01); H01M 50/213 (2021.01); H01M 50/227 (2021.01); H01M 50/247 (2021.01); H01M 50/262 (2021.01); H01M 50/296 (2021.01)
CPC H01M 10/486 (2013.01) [H01M 10/425 (2013.01); H01M 10/48 (2013.01); H01M 10/482 (2013.01); H01M 10/613 (2015.04); H01M 10/6235 (2015.04); H01M 10/643 (2015.04); H01M 50/213 (2021.01); H01M 50/247 (2021.01); H01M 10/6563 (2015.04); H01M 50/227 (2021.01); H01M 50/262 (2021.01); H01M 50/296 (2021.01); H01M 2220/30 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A battery pack comprising:
a plurality of battery cells that includes a first battery cell and a second battery cell;
a circuit board;
a first thermistor comprising a film thermistor connected to the circuit board and disposed closest to the first battery cell among the plurality of battery cells;
a second thermistor comprising a dip thermistor connected to the circuit board and disposed closest to the second battery cell among the plurality of battery cells; and
a case accommodating the plurality of battery cells, the circuit board, the first thermistor, and the second thermistor,
wherein:
the first battery cell is disposed at a position where at least one of the battery cells is interposed between the first battery cell and a wall surface of the case in a direction orthogonal to a longitudinal direction of the first battery cell,
the second battery cell is disposed at a position where no other battery cell is interposed between the second battery cell and the wall surface of the case in a direction orthogonal to a longitudinal direction of the second battery cell,
the film thermistor extends from the circuit board toward the first battery cell, and passes through spaces between two adjacent battery cells of the plurality of battery cells, the two adjacent battery cells being different from the first battery cell and the second battery cell, and
the dip thermistor extends from the circuit board toward the second battery cell, and passes through spaces between the plurality of battery cells and a wall surface of the case.