Power tool battery pack
AssigneeMakita Corporation
InventorHironori Ogura
Life of this patent
Estimating the term…
Abstract
A power tool battery pack includes a lower side case, an upper side case fixed to the lower side case, a battery cell in the lower side case and a circuit board connected to the battery cell. A plurality of electrical signal terminals are arranged in parallel on the circuit board, and the circuit board includes at least one slit between adjacent pairs of the plurality of signal terminals to make it difficult for any water that reaches the circuit board to electrically short two of the signal terminals together. Alternately or in addition, a wall structure may be provided between the terminals for reducing the likelihood that water reaching one of the signal terminals will be able to electrically connect two of the signal terminals.
Claims21
A power tool battery pack, comprising:
- a lower side case;
- an upper side case fixed to the lower side case;
- at least one battery cell housed in the lower side case;
- a circuit board electrically connected to the battery cell;
- first and second terminals disposed on and connected to the circuit board;
- and
- a slit extending through the circuit board between the first terminal and the second terminal.
A power tool battery pack, comprising:
- a lower side case;
- an upper side case connectable to the lower side case;
- a battery cell housed in the lower side case;
- a circuit board connected to the battery cell and having at least a first terminal, a second terminal and a third terminal arranged in a line in a first direction;
- and
- a slit extending through the circuit board, the slit including a slit first portion extending in the first direction adjacent to the first, second and third terminals, a slit second portion extending from the slit first portion and between the first terminal and the second terminal, and a slit third portion extending from the slit first portion and between the second terminal and the third terminal.
A power tool battery pack, comprising:
- a lower side case;
- an upper side case fixed to the lower side case;
- at least one battery cell housed in the lower side case;
- a cell holder holding the at least one battery cell;
- a circuit board electrically connected to the at least one battery cell;
- and
- first and second terminals disposed in parallel on and connected to the circuit board;
- wherein:
- the first terminal and the second terminal are respectively supported by and located entirely on first and second cantilevered portions of the circuit board.
A power tool battery pack, comprising:
- a lower side case;
- an upper side case fixed to the lower side case;
- at least one battery cell housed in the lower side case;
- a cell holder holding the battery cell;
- a circuit board electrically connected to the battery cell and having at least two terminals on an upper surface of the circuit board, the at least two terminals being parallel and extending in a front-rear direction of the battery pack;
- and
- a partition wall extending perpendicularly from an upper surface of the cell holder in a direction away from at least one battery cell;
- wherein the partition wall is disposed at least between the at least two terminals and a front end of the battery pack in the front-rear direction of the battery pack.
Dependencies are inferred from the claim text.