US 12,394,829 B2
Battery pack
Yonosuke Aoki, Anjo (JP); and Tatsuki Mori, Anjo (JP)
Assigned to MAKITA CORPORATION, Anjo (JP)
Appl. No. 17/764,023
Filed by MAKITA CORPORATION, Anjo (JP)
PCT Filed Sep. 24, 2020, PCT No. PCT/JP2020/036118
§ 371(c)(1), (2) Date Mar. 25, 2022,
PCT Pub. No. WO2021/060404, PCT Pub. Date Apr. 1, 2021.
Claims priority of application No. 2019-175645 (JP), filed on Sep. 26, 2019.
Prior Publication US 2022/0352559 A1, Nov. 3, 2022
Int. Cl. H01M 10/42 (2006.01); H01M 10/44 (2006.01); H01M 50/204 (2021.01); H01M 50/247 (2021.01); H01M 50/258 (2021.01); H01M 50/296 (2021.01)
CPC H01M 10/425 (2013.01) [H01M 10/441 (2013.01); H01M 50/204 (2021.01); H01M 50/247 (2021.01); H01M 50/258 (2021.01); H01M 50/296 (2021.01); H01M 2220/30 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A battery pack comprising:
two or more battery blocks each having a positive electrode and a negative electrode; and
a connection circuit configured to be connected to a positive terminal and a negative terminal of an electric work machine, the connection circuit being configured to connect the positive terminal and the negative terminal to a specific number of battery blocks included in the two or more battery blocks, and the specific number depending on electrical properties of the electric work machine, the electric work machine having a work machine communication terminal configured to transmit a machine information that specifies the electrical properties,
the connection circuit including:
a battery communication terminal configured to be connected to the work machine communication terminal and receive the machine information transmitted from the work machine communication terminal, and
a controller located in the battery pack and connected to the battery communication terminal,
the controller being configured to:
select the specific number of battery blocks from the two or more battery blocks, based on the machine information that is input from the work machine via the work machine communication terminal and the battery communication terminal,
connect the positive electrode of each of the specific number of battery blocks to the positive terminal via the connection circuit,
connect the negative electrode of each of the specific number of battery blocks to the negative terminal via the connection circuit, and
disconnect the positive electrode or the negative electrode of each remaining battery block of the two or more battery blocks from the positive terminal or the negative terminal via the connection circuit.