JP2010114094A - Battery pack - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a battery pack with a simple structure and capable of manufacturing at low cost and a power tool equipped with the same. <P>SOLUTION: The battery pack 10 is composed of a housing 11, a cell group 12, a base board 13, a plurality of second terminals 14 and a cover 15. An aperture 16c is formed on the housing 11. The base board 13 is equipped with a terminal arrangement portion 13A. The plurality of second terminals 14 are located at the terminal arrangement portion of the base board 13. The cover 15, of a plate type, covers an area arranged between the terminal arrangement portion 13A and the aperture 16c of the base board 13, and has its clipped portion located between an upper housing and the base board 13. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a battery pack.

  Conventionally, in order to improve workability, there is an electric tool that uses a battery pack as power. This battery pack has a housing in which an opening is formed, and a cell group, a substrate, and a first terminal are accommodated in the housing. The terminal is provided in the vicinity of the opening so as to be fitted to the main body of the electric tool or the second terminal of the charger. The substrate is disposed at a position separated from the terminal, and is connected to the terminal by a lead wire.

  However, in the conventional battery pack, since the substrate and the terminal are located at a distance from each other, the structure is complicated and the number of parts is increased. For this reason, the battery pack is expensive, and the electric tool including the battery pack is also expensive.

  Accordingly, an object of the present invention is to provide a battery pack that can be simplified in structure and can be manufactured at low cost.

  To achieve the above object, the present invention provides a housing, a plurality of battery cells housed in the housing, a substrate housed in the housing and electrically connected to the plurality of battery cells, A positive electrode terminal and a negative electrode terminal which are disposed on the surface of the substrate and are electrically connected to the substrate; an opening formed in the housing and straddling the positive electrode terminal and the negative electrode terminal; and the housing Is provided separately, and provides a battery pack having a cover that covers a space between the positive terminal and the negative terminal on the surface of the substrate.

  In addition, the present invention provides a housing having an upper housing and a lower housing, a plurality of battery cells accommodated in the housing, and disposed between the upper housing and the battery cells, the plurality of battery cells. A substrate electrically connected to the substrate, a positive electrode terminal and a negative electrode terminal which are disposed on the surface of the substrate and electrically connected to the substrate, and are formed in the upper housing, to the positive electrode terminal and the negative electrode terminal Provided is a battery pack having an opening formed in a straddle and a cover formed separately from the housing and covering between the positive terminal and the negative terminal on the surface of the substrate.

The present invention further includes a housing, a plurality of battery cells accommodated in the housing, a substrate accommodated in the housing and electrically connected to the plurality of battery cells, and disposed on a surface of the substrate. A positive terminal and a negative terminal electrically connected to the substrate, the positive terminal and the negative terminal being attached to the substrate, and a distal end extending along the substrate from the base end Have
An opening that is formed in the housing and straddles the positive electrode terminal and the negative electrode terminal and is located on the distal end side of the base end portion, and the housing is provided separately from the surface of the substrate. A battery pack comprising a cover that covers the tip end side of the battery pack.

  Furthermore, the present invention provides a lower housing, a cell accommodated in the lower housing, a substrate provided above the cell and electrically connected to the cell, and electrically connected to the substrate. A terminal group comprising: a positive electrode terminal; a negative electrode terminal; a terminal group having a signal transmission terminal located between the positive electrode terminal and the negative electrode terminal; and an upper housing connected above the lower housing. And an upper housing having a terminal insertion portion that covers the terminal group, an opening defining portion positioned below the terminal insertion portion, and an opening positioned between the terminal accommodating portion and the opening defining portion. A positive electrode terminal, a negative electrode terminal, and a signal transmission terminal arranged in a straight line, and each terminal of the terminal group includes a base end portion extending substantially upward from the substrate; A tip portion extending substantially parallel to the substrate; By providing a cover having a first portion that covers the upper surface of the substrate on the opening defining portion side with respect to the group and a second portion that extends between the terminal group, the distal end portion of the terminal group is disposed on the opening portion. And a battery pack configured to close the space from the opening to the substrate with the cover.

  According to the battery pack of the first to fourth aspects, since the cover is provided, it is possible to suppress foreign matters from being mixed on the substrate, and it is possible to suppress damage to the substrate due to the foreign matters.

The perspective view of an electric tool provided with the battery pack in embodiment of this invention. The perspective view which turned the main-body part of the electric tool of FIG. 1 upside down. The perspective view of the battery pack in embodiment of this invention. The disassembled perspective view of the battery pack in embodiment of this invention. The top view of the cell group, board | substrate, and 2nd terminal of the battery pack in embodiment of this invention. The perspective view of the cover of the battery pack in embodiment of this invention. The figure which showed the state which attached the cover to the cell group, board | substrate, and 2nd terminal which were shown in FIG. The perspective view of the cell group, board | substrate, 2nd terminal, and cover of the battery pack in embodiment of this invention. Sectional drawing along the IX-IX line of FIG.

  A battery pack and a power tool including the battery pack according to an embodiment of the present invention will be described with reference to FIGS. 1 and 9. In the following description, the direction shown in FIGS. As shown in FIG. 1, a drill 1 that is an electric tool mainly includes a main body 2, a handle 3, and a battery pack 10.

  The main body 2 incorporates a motor (not shown), and is provided with a tool holding portion 2A that is an output portion and can be fitted with a drill bit 5 at the tip portion. The handle 3 extends from the rear end portion of the main body 2, and a trigger 3 </ b> A is provided at the base end portion of the extended portion. The trigger 3A controls electricity supplied from the battery pack 10 to a motor (not shown). Further, as shown in FIG. 2, a plurality of plate-like first terminals 3 </ b> B that are fitted to a plurality of second terminals 14 described later are provided at the end portion of the handle 3 in the extending direction.

  The battery pack 10 is detachably provided along the front-rear direction of the drill 1 at the distal end portion of the handle 3 in the extending direction. The battery pack 10 will be described in detail with reference to FIGS. The battery pack 10 includes a housing 11, a cell group 12, a substrate 13, a plurality of second terminals 14, and a cover 15. The housing 11 includes an upper housing 16 and a lower housing 17 and accommodates the cell group 12, the substrate 13, the plurality of second terminals 14, and the cover 15. The upper housing 16 mainly includes a terminal insertion portion 16A and an opening defining portion 16B. A substantially rectangular opening 16c is defined by the terminal insertion portion 16A and the opening defining portion 16B. The opening 16c functions as an insertion portion for inserting a plate-shaped protection member that protects a terminal of a charger (not shown) when the battery pack 10 is connected to a charger (not shown) for charging. The terminal insertion portion 16A is formed with a plurality of slots 16d that open toward the rear.

  As shown in FIG. 4, the cell group 12 includes a plurality of cells, and each cell is formed of a nickel metal hydride battery, a lithium ion battery, or the like, and is a battery that can be charged and discharged multiple times. The substrate 13 is provided on the cell group 12 and is electrically connected to the cell group 12. As shown in FIG. 5, terminal placement portions 13 </ b> A that extend along the longitudinal direction of the openings 16 c are defined on the substrate 13. Further, the rear edge 13 </ b> B of the substrate 13 is arranged to face the front edge 16 </ b> E (FIG. 4) of the opening defining portion 16 </ b> B of the upper housing 16.

  The plurality of second terminals 14 are arranged on the terminal arrangement portion 13 </ b> A of the substrate 13 so as to be arranged along the longitudinal direction of the opening 16 c, and are electrically connected to the substrate 13. The plurality of second terminals 14 are respectively positioned in the slots 16d in a state where the battery pack 10 is assembled together (see FIG. 9). Further, as shown in FIG. 5, each of the plurality of second terminals 14 has a shape in which the flat plate is bent into a U shape and the vicinity of the end of the flat plate is brought into contact so as to close the opening end. When the battery pack 10 is attached to the front end of the handle 3, the first terminal 3B is inserted into the slot 16d from the rear side, and is fitted and press-fitted into the second terminal 14 so as to expand the opening end. The first terminal 3B and the second terminal 14 are fitted.

  The plurality of second terminals 14 include a charging positive terminal 14A1, a discharging positive terminal 14A2, a charging / discharging negative terminal 14B, and signal transmission terminals 14C1 and 14C2. The positive terminals 14A1 and 14A2 and the negative terminal 14B are arranged near both ends of the terminal arrangement portion 13A, and the signal transmission terminal 14C1 is located between them. The positive terminals 14A1 and 14A2 and the negative terminal 14B are short-circuited when a nail or the like simultaneously contacts them, but the signal transmission terminals 14C and 14C2 are configured not to be short-circuited even if the nail or the like contacts them simultaneously. Yes. The electricity stored in the cell group 12 is supplied to the main body 2 via the substrate 13 and the second terminal 14. In addition, electricity is supplied from the charger (not shown) to the cell group 12 via the substrate 13 and the second terminal 14, and the cell group 12 is charged.

  The cover 15 will be described with reference to FIGS. FIG. 7 shows a state where the cover 15 is attached to the substrate 13 and the second terminal 14 shown in FIG. The cover 15 includes a substrate covering portion 15A, a pair of sandwiched portions 15B, a protruding portion 15C, a plurality of protruding portions 15D, and a plurality of standing portions 15E. The substrate cover 15A has a plate shape and is configured to have substantially the same width as the longitudinal direction of the opening 16c. Further, the substrate covering portion 15A covers a portion located between the terminal arrangement portion 13A of the substrate 13 and the opening portion 16c.

  The pair of sandwiched portions 15B are provided at both ends in the left-right direction of the substrate cover portion 15A. As shown in FIG. 9, the sandwiched portion 15 </ b> B is sandwiched between the upper housing 16 and the substrate 13. Thereby, the cover 15 is fixed and positioned in the housing 11. As shown in FIGS. 7 and 8, the protrusion 15C extends between the positive terminals 14A1 and 14A2 and the negative terminal 14B of the substrate cover 15A and extends from the rear side to the front side of the substrate cover 15A. It is provided as follows.

  As shown in FIGS. 6 and 7, the plurality of projecting portions 15 </ b> D extend from the front side edge of the substrate cover portion 15 </ b> A to the vicinity of the front side end portions of the plurality of second terminals 14, respectively. It is interposed between adjacent terminals. As shown in FIGS. 6, 8, and 9, the plurality of standing portions 15 </ b> E extend from the front end of each protrusion 15 </ b> D in a direction orthogonal to the substrate 13, and are terminal insertion portions 16 </ b> A of the upper housing 16. It extends to.

  As described above, according to the battery pack 10 of the present embodiment, the cover 15 is provided on the substrate 13, and the substrate cover 15 </ b> A is located between the terminal arrangement portion 13 </ b> A of the substrate 13 and the opening 16 c. It covers the part. Therefore, it is possible to prevent foreign matter such as nails from entering the substrate 13 from the opening 16c, and to suppress damage to the substrate 13 due to the foreign matter. Further, the cover 15 is sandwiched between the upper housing 16 and the substrate 13 by a pair of sandwiched portions 15B. Thereby, since the cover 15 is fixed and positioned in the housing, the cover 15 can be positioned without providing a positioning member.

  Further, since the protrusion 15C is provided between the positive terminals 14A1 and 14A2 and the negative terminal 14B of the substrate cover 15A, for example, even when a nail or the like enters the opening 16c of the housing 11, It is possible to prevent the nail from simultaneously contacting the positive electrode terminals 14A1 and 14A2 and the negative electrode terminal 14B and short-circuiting. In addition, since the plurality of projecting portions 15D are interposed between the adjacent terminals of the plurality of second terminals 14, it is possible to prevent foreign matter from entering the substrate 13 from between the adjacent terminals. The damage to the substrate 13 due to foreign matter can be suppressed. Furthermore, since the plurality of standing portions 15E extend from the front end of each protrusion 15D to the terminal insertion portion 16A of the upper housing 16, the rear of the second terminal 14 is interposed between the adjacent terminals. It is possible to suppress foreign matters from entering from the side to the front side.

  Further, according to the battery pack 10 of the present embodiment, the plurality of second terminals 14 are provided in the terminal arrangement portion 13A of the substrate 13 and are located between the terminal arrangement portion 13A of the substrate 13 and the opening 16c. Since the structure includes the cover 15 that covers the portion, the structure of the battery pack 10 can be simplified, and the battery pack 10 can be manufactured at low cost. Moreover, according to the electric tool 1 of this Embodiment, since the cheap battery pack 10 is provided, the cheap electric tool 1 can be provided.

  The battery pack and the electric tool including the battery pack according to the present invention are not limited to the above-described embodiments, and various modifications and improvements can be made within the scope described in the claims.

DESCRIPTION OF SYMBOLS 1 ... Electric tool, 10 ... Battery pack, 11 ... Housing, 13 ... Board 13A ... Terminal arrangement part, 14 ... Second terminal, 14A1 ... Positive charge terminal 14A2, ... Positive discharge terminal, 14B ··· Negative terminal for charging and discharging 15 · · Cover 15A · · Substrate cover, 15B · · Clamping portion, 15C · · Protruding portion 15D · · Opening 17 ... Lower housing

Claims (4)

A housing;
A plurality of battery cells housed in the housing;
A substrate housed in the housing and electrically connected to the plurality of battery cells;
A positive terminal and a negative terminal disposed on the surface of the substrate and electrically connected to the substrate;
An opening formed in the housing and straddling the positive terminal and the negative terminal;
A battery pack comprising: a cover provided separately from the housing and covering a space between the positive terminal and the negative terminal on the surface of the substrate. A housing having an upper housing and a lower housing;
A plurality of battery cells housed in the housing;
A substrate disposed between the upper housing and the battery cell and electrically connected to the plurality of battery cells;
A positive terminal and a negative terminal disposed on the surface of the substrate and electrically connected to the substrate;
An opening formed in the upper housing and straddling the positive terminal and the negative terminal;
A battery pack, comprising: a cover formed separately from the housing and covering a space between the positive terminal and the negative terminal on the surface of the substrate. A housing;
A plurality of battery cells housed in the housing;
A substrate housed in the housing and electrically connected to the plurality of battery cells;
A positive terminal and a negative terminal disposed on the surface of the substrate and electrically connected to the substrate, wherein the positive terminal and the negative terminal are attached to the substrate from the base end and the base end to the substrate And a tip portion extending along
Formed in the housing and straddling the positive electrode terminal and the negative electrode terminal, an opening located on the distal end side of the base end, and
A battery pack, comprising: a cover provided separately from the housing and covering the front end side of the surface of the substrate. A housing having an upper housing and a lower housing;
A plurality of battery cells housed in the housing;
A substrate disposed between the upper housing and the battery cell and electrically connected to the plurality of battery cells;
A positive electrode terminal and a negative electrode terminal disposed on the surface of the substrate and electrically connected to the substrate, wherein the positive electrode terminal and the negative electrode terminal are attached to the substrate from the base end portion and the base end portion to the substrate And a tip portion extending along
Formed in the upper housing, formed across the positive electrode terminal and the negative electrode terminal, an opening located on the distal end side of the base end, and
A battery pack, comprising: a cover provided separately from the housing and covering the front end side of the surface of the substrate.

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