JP2009135110A - Battery pack and combination of the battery pack and electrical tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a battery pack for being inexpensively manufactured and having a simple structure and to provide an electrical tool provided with the battery pack. <P>SOLUTION: A battery pack 10 includes a housing 11, a cell group 12, a substrate 13, a plurality of second terminals 14 and a cover 15. An opening 16c is formed in the housing 11. The substrate 13 includes a terminal arrangement section 13A. The second terminals 14 are arranged at the terminal arrangement section on the substrate 13. The cover 15 is formed in a plate-like shape, covers a portion located between the terminal arrangement section 13A on the substrate 13 and the opening 16c, and includes a held part held between the upper housing and the substrate 13. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a battery pack and a combination of a battery pack and a power tool.

  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.

  Therefore, 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, and a combination of a battery pack and a power tool.

  In order to achieve the above object, the present invention provides a battery pack that is detachably attached to a device body and can be supplied with power, and includes a housing composed of an upper housing and a lower housing, and is accommodated in the housing. A plurality of battery cells, a substrate disposed between the battery cells and the upper housing, and provided on the substrate, when the battery pack is mounted on the device body, the terminals are pushed and spread by the terminals of the device body Each having an open end electrically connected to a terminal of the device main body, a positive electrode terminal and a negative electrode terminal for supplying power to the device main body, a plurality of slots formed in the upper housing, A terminal insertion portion disposed with a gap between the substrate and the upper housing, the positive terminal and the open end of the negative terminal across the plurality of slots of the terminal insertion portion. Part In the gap between the substrate and the terminal insertion portion, a cover that covers at least a portion of the substrate located on the opening side of the positive electrode terminal and the negative electrode terminal is provided in the gap between the substrate and the terminal insertion portion. The battery pack is provided, and the cover has a sandwiched portion sandwiched between the upper housing and the substrate.

  Here, the cover is preferably provided with a protrusion located between the positive terminal and the negative terminal.

  Moreover, it is preferable that this protrusion part is extended in the direction which goes to this positive electrode terminal and this negative electrode terminal from this opening part.

  The cover is preferably provided with a protruding portion that is interposed between the positive electrode terminal and the negative electrode terminal and extends from the opening toward the positive electrode terminal and the negative electrode terminal.

  Further, the cover is erected between the positive electrode terminal and the negative electrode terminal and located on the side opposite to the opening end portion from the opening end portion and is erected toward the terminal insertion portion of the upper housing. It is preferable that a portion is provided.

  In order to achieve the above object, the present invention provides a combination of a battery pack and an electric tool constituted by any one of the above battery packs and an electric tool powered by the battery pack.

  According to the battery pack of the first aspect, the portion of the substrate located between the terminal arrangement portion and the opening is provided with the cover that covers the portion, so that foreign matters are mixed on the substrate. This can be suppressed and damage to the substrate due to foreign matter can be suppressed. Further, since the cover is fixed and positioned with respect to the housing by the sandwiched portion, positioning can be performed without providing a positioning member, and the structure of the battery pack can be simplified and the battery pack can be manufactured at low cost. it can.

  Further, according to the battery pack according to claim 2 and claim 3, since the protrusion is provided between the positive electrode terminal and the negative electrode terminal of the cover, for example, a nail or the like enters the opening of the housing. Even when the nail is touched, it is possible to prevent the nail from simultaneously contacting the positive electrode terminal and the negative electrode terminal and short-circuiting.

  According to the battery pack of the fourth aspect, since the cover includes the protruding portion interposed between the adjacent terminals of the plurality of terminals, foreign matter is mixed on the substrate from between the adjacent terminals. It can be suppressed, and damage to the substrate due to foreign matter can be suppressed.

  According to the battery pack of claim 5, the standing portion extending in the direction orthogonal to the substrate is provided between the positive electrode terminal and the negative electrode terminal and on the side opposite to the opening portion from the opening end portion. Therefore, it is possible to prevent foreign matter from entering from the front side to the back side in the direction in which the first terminal is inserted through the terminals adjacent to each other.

  In addition, according to the electric tool of claim 6, a plurality of terminals are provided in the terminal arrangement portion of the board, and a low cost provided with a cover that covers a portion located between the terminal arrangement portion and the opening of the board. Since the battery pack can be manufactured, an inexpensive electric tool can be provided.

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 a plurality of 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, 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 power 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 charge and discharge 15 · · Cover 15A · · Substrate cover, 15B · · Holding portion, 15C · · Projection portion 15D · · Projection portion 15E · · Standing portion 16 · · Upper housing 16c · · Opening 17 ... Lower housing

Claims (6)

A battery pack that is detachably attached to the device body and can be powered,
A housing composed of an upper housing and a lower housing;
A plurality of battery cells housed in the housing;
A substrate disposed between the battery cell and the upper housing;
Provided on the substrate, each having an open end that is spread by a terminal of the device body and electrically connected to the terminal of the device body when the battery pack is attached to the device body, A positive terminal and a negative terminal for supplying power to the device body;
A terminal insertion portion formed in the upper housing and having a plurality of slots and being spaced from the substrate;
The upper housing is formed with an opening that opens to the opening end side of the positive terminal and the negative terminal across the plurality of slots of the terminal insertion portion,
In the gap between the substrate and the terminal insertion portion, a cover that covers at least a portion of the substrate located on the opening side of the positive electrode terminal and the negative electrode terminal is provided,
The battery pack according to claim 1, wherein the cover includes a sandwiched portion that is sandwiched between the upper housing and the substrate.   The battery pack according to claim 1, wherein the cover is provided with a protrusion located between the positive electrode terminal and the negative electrode terminal.   The battery pack according to claim 2, wherein the protrusion extends from the opening in a direction toward the positive terminal and the negative terminal.   The cover is provided with a projecting portion interposed between the positive electrode terminal and the negative electrode terminal and extending in a direction from the opening toward the positive electrode terminal and the negative electrode terminal. The battery pack according to any one of claims 1 to 3.   The cover is provided between the positive electrode terminal and the negative electrode terminal, and is located on the side opposite to the opening from the opening end, and is erected toward the terminal insertion portion of the upper housing. The battery pack according to claim 1, wherein the battery pack is provided.   A combination of a battery pack and an electric tool, comprising: the battery pack according to any one of claims 1 to 5; and an electric tool powered by the battery pack.

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