Disclosed are a battery pack and a manufacturing method therefor. The battery pack comprises: a battery module, comprising several cells, wherein the cells are electrically connected to each other, and each cell comprises an outer side face in the direction of longitudinal extension thereof; an adapter portion, for establishing mechanical and electrical connection between an electric tool and the battery pack; a holder, wherein an accommodating cavity is internally formed in the holder, and the cells are at least partially received in the accommodating cavity; and a filler, which wraps the outer side faces of the cells, is located at an inner side of the accommodating cavity and is used for transferring heat generated by the cells out of the accommodating cavity. The outer side faces of the cells are completely accommodated in the accommodating cavity, and the ratio of the length along which the filler is set in the lengthwise direction of the cells to the length of the cells is not less than 30%.

A battery pack includes a housing defining an upper portion and a lower portion, a first protector portion coupled to a first corner of the housing, a second protector portion coupled to a second corner of the housing, a plurality of battery cells disposed within the housing, and a mating feature including a plurality of ports electrically connected to the plurality of battery cells and structured to supply power from the plurality of battery cells through the ports.

A battery pack comprises a set of battery cells, a battery cell holder holding the battery cells, at least one battery strap having a first end connected to a terminal of one of the battery cells and a second end extending from the battery cell holder, a printed circuit board having a first side and a second side, components mounted on the second side of the printed circuit board, a trace on the second side of the printed circuit board extending from one components to a contact connected to the trace and mated with the second end of the at least one battery strap. Multiple vias extend from the first side to the second side, and the contact comprises a first portion having a through hole and a leg integrally formed with and approximately perpendicular to the first portion, the leg extending from the first side of the PCB to the second side of the PCB through a first via, the trace extending from the first via, the leg soldered to the second side of the PCB and the via and the through hole aligned with a second via adjacent to the first via, the through hole sized and configured to receive a PCB end of the strap, the PCB end of the strap soldered to the contact.

A battery pack having a high temperature is effectively cooled. The battery pack includes an exterior case, a battery, a battery holder, and a heat absorbing portion. The heat absorbing portion is configured to absorb heat by a phase change. The battery holder includes a first battery holder that holds an electrode portion of the battery and a second battery holder that surrounds a body portion of the battery. The second battery holder includes a pool portion. The heat absorbing portion is housed in the pool portion.

A battery pack having a high temperature is effectively cooled. The battery pack includes an exterior case, a battery, a battery holder, and a heat absorbing portion. The heat absorbing portion is configured to absorb heat by a phase change. The battery holder includes a first battery holder that holds an electrode portion of the battery and a second battery holder that surrounds a body portion of the battery. The second battery holder includes a pool portion. The heat absorbing portion is housed in the pool portion.

As a cooling draft flows from a rear side to a front side of battery cells (72) inside a battery pack (30), it is divided into two cooling drafts (F1, F2) in a left-right direction, which is the direction that the battery cells (72) are disposed in parallel, and those two cooling drafts respectively flow through a plurality of passageways that longitudinally extend along the battery cells (72). More particularly, a second battery cell (722) is cooled by the cooling draft flowing in a second ventilation-path volume (Q2) before a first battery cell (721) and a third battery cell (723) are cooled by cooling drafts respectively flowing in a first ventilation-path volume (Q1) and a third ventilation-path volume (Q3), which are longer than the second ventilation-path volume (Q2).

As a cooling draft flows from a rear side to a front side of battery cells (72) inside a battery pack (30), it is divided into two cooling drafts (F1, F2) in a left-right direction, which is the direction that the battery cells (72) are disposed in parallel, and those two cooling drafts respectively flow through a plurality of passageways that longitudinally extend along the battery cells (72). More particularly, a second battery cell (722) is cooled by the cooling draft flowing in a second ventilation-path volume (Q2) before a first battery cell (721) and a third battery cell (723) are cooled by cooling drafts respectively flowing in a first ventilation-path volume (Q1) and a third ventilation-path volume (Q3), which are longer than the second ventilation-path volume (Q2).

Battery packs that include a housing, a plurality of rechargeable battery cells within the housing, and a plurality of thermoelectric generators. The plurality of thermoelectric generators are within the housing and are positioned proximate to and in thermal communication with the plurality of rechargeable battery cells.

Battery packs that include a housing, a plurality of rechargeable battery cells within the housing, and a plurality of thermoelectric generators. The plurality of thermoelectric generators are within the housing and are positioned proximate to and in thermal communication with the plurality of rechargeable battery cells.

To reduce standby time during charging, a charging device includes a housing on which a battery pack is detachably mountable, a control board, and a cooling fan. The battery pack is formed with a vent hole. The housing is formed with a ventilation opening configured to face the vent hole. The cooling fan is configured to flow an air passing through the control board and the ventilation opening, and is configured to work even in a state where the battery pack is detached.