Title:
POWER SUPPLY DEVICE AND SYSTEM
Document Type and Number:
Japanese Patent JP2021136854
Kind Code:
A
Abstract:
To provide a power supply device and a system, where usability is improved when a plurality of battery packs are mounted.SOLUTION: A power supply device comprises: a power supply box 2 to which a plurality of battery packs BT1 to BT4 can be connected concurrently, each battery pack including a plurality of cell units; a power source cord 4 that extends from the power supply box 2 and is capable of being connected to an external AC power supply; and an adapter 6 that is provided at a tip of a cable 5 extending from the power supply box 2 and is capable of being mounted on an external electric tool 50. Each of the battery packs BT1 to BT4 includes the plurality of cell units and can perform switching connection of the plurality of cell units between serial connection and parallel connection. The power supply box 2 can output DC voltage to the electric tool 50 by connecting in series the plurality of battery packs in each of which the plurality of cell units are connected in parallel.SELECTED DRAWING: Figure 4
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Inventors:
KIJIMA YUJI
NAKANO YASUSHI
KOBAYASHI AKIHIRO
NAKANO YASUSHI
KOBAYASHI AKIHIRO
Application Number:
JP2020034354A
Publication Date:
September 13, 2021
Filing Date:
February 28, 2020
Export Citation:
Assignee:
KOKI HOLDINGS CO LTD
International Classes:
H02J7/00; H01M10/44; H02J7/02
Domestic Patent References:
| JP2017112802A | 2017-06-22 | |||
| JP2003173822A | 2003-06-20 | |||
| JP2011097766A | 2011-05-12 | |||
| JP2011218510A | 2011-11-04 | |||
| JP2019004631A | 2019-01-10 |
Foreign References:
| WO2019171808A1 | 2019-09-12 |
Attorney, Agent or Firm:
Takashi Murai
Hiromi Murai
Hiromi Murai