WO2018079725A1

WO2018079725A1 - Battery pack, and electric appliance using battery pack

Info

Publication number: WO2018079725A1
Application number: PCT/JP2017/038952
Authority: WO
Inventors: 西河　智雅; 高野　信宏; 収川野辺; 勇人山口; 央松下
Original assignee: 日立工機株式会社
Priority date: 2016-10-31
Filing date: 2017-10-27
Publication date: 2018-05-03
Also published as: JP6729711B2; JPWO2018079725A1

Abstract

In order to enable electric appliances driven by a battery pack to be also driven by an AC power, an AC socket 49 that connects, to a battery pack attachment part 40 to which an attachable/detachable type battery pack is attached, a power supply cord 90 for supplying a commercial power is provided to an electric appliance in which the battery pack attachment part 40 is installed in a housing 32A for housing a motor. The AC socket 49 is disposed at a place (40a) not exposed to the outside when the battery pack is attached. In addition, a rectifier circuit that converts the supplied AC voltage into a DC voltage and outputs the DC voltage is configured to be housed inside the housing 32A, such that, when the commercial power is inputted by the power supply cord 90, power is fed to the motor through the rectifier circuit. Since it is possible to select between whether the battery pack is attached to the battery pack attachment part 40 or the power supply cord 90 is attached to the battery pack attachment part 40, the electric appliance can be driven by both DC power and AC power.

Description

Battery pack and electric device using the battery pack

The present invention relates to a battery pack that supplies power to an electric device body including a load device such as a motor and lighting. The present invention also relates to an electric device such as an electric tool using a battery pack that operates the device by attaching the battery pack, or an electric device main body from which the battery pack is removed. Furthermore, the electric device main body driven by the battery pack can be driven by an AC power source.

Electric tools and electric devices that use commercial power sources are driven by battery packs that use secondary batteries such as lithium ion batteries, and cordless electric tools and electric devices are being promoted. For example, in a hand-held power tool that drives a tip tool with a motor, a battery pack containing a plurality of secondary battery cells is used, and the motor is driven with electric energy stored in the battery pack. The battery pack is configured to be attachable to and detachable from the electric tool body. When the voltage drops due to discharge, the battery pack is removed from the electric tool body and charged using an external charger.

Cordless power tools and electrical devices are required to have a predetermined operating time and a predetermined output, and higher output and higher power have been achieved along with the performance improvement of the secondary battery. In addition, battery packs with various voltages have been prepared as electric devices using battery packs as power sources have been developed. Usually, the output voltage of the battery pack is fixed. However, in Patent Document 1, a plurality of battery units are provided in a housing that accommodates the battery, and the connection means determines whether to output them as a series connection or a parallel connection. There has been proposed a power supply device for an electric device that can be selected and adapted to devices of different voltages.

Japanese Patent Application Laid-Open No. 2014-17794

It is cumbersome for a user to prepare a plurality of types of battery packs when using a plurality of electric tools and electric devices, and a battery that is easy to use corresponding to electric tools and electric devices having different voltages by switching the voltage. Realization of the pack is desired. Moreover, it has been desired to realize a voltage switching type with a battery pack that can be easily attached to an electric device, rather than a power supply device that is separate from the electric device main body as in Patent Document 1.

This invention is made | formed in view of the said background, Comprising: The objective of this invention is providing the electric equipment main body which can operate | move with either a battery pack or an alternating current power supply device.
Another object of the present invention is to provide a battery pack that can be used for high-load work and an electrical device using the battery pack.

A representative one of the inventions disclosed in the present application will be described as follows. 1st invention is a main part of an electric equipment provided with the load device, the housing which stores the load device, and the battery pack mounting part provided in the housing so that the battery pack can be mounted, The housing is an electric device main body configured to connect an AC power supply device that supplies an AC voltage to the electric device main body. According to 1st invention, the subject of providing the electric equipment main body which can operate | move by any of a battery pack or an alternating current power supply can be solved by providing said characteristic.

2nd invention is a battery pack provided with the cell unit which has a some cell, and the housing which accommodates the said cell unit, Comprising: The voltage which the said cell unit outputs was set to 100V or more, The battery characterized by the above-mentioned It is a pack. According to 2nd invention, the subject of providing the battery pack which can be used for a heavy load operation | work, and an electric equipment using the same can be solved by providing said characteristic.

And not only the invention having the above-described features, but also the invention having the following features, for example, can solve at least one of the above-mentioned issues. Moreover, the structure with which the Example described in the column of the form for inventing is equipped can also be combined with these invention.

A third invention includes a load device, a housing that houses the load device, a battery pack mounting portion that is provided in the housing so that the battery pack can be mounted, and a positive input terminal that can be connected to the positive terminal of the battery pack. A battery pack mounting portion having a negative electrode input terminal connectable to the negative electrode terminal of the battery pack, and a rectifier circuit that converts the supplied AC voltage into a DC voltage and outputs the same, and the AC voltage is converted into the rectifier circuit. The AC power supply unit is configured so that the AC power supply device to be supplied can be connected to the housing, and the AC power supply device is not exposed to the outside when the battery pack mounting portion is mounted on the battery pack mounting portion. An electric device main body characterized by being configured to be connectable. According to 3rd invention, the subject of providing the electric equipment main body which can be operate | moved by any of a battery pack or an alternating current power supply device can be solved by providing said characteristic. According to the third aspect of the invention, since the AC power supply device can be connected to the battery pack mounting portion, the electrical device main body can be made compact compared to the case where the AC power supply device is connected to a place other than the battery pack mounting portion. There exists an effect that it can constitute.

According to a fourth aspect of the present invention, a rectifier circuit is provided in a circuit connected to the load device from the positive electrode input terminal and the negative electrode input terminal provided in the battery pack mounting part, and an AC power supply device is provided in the positive electrode input terminal and the negative electrode input terminal of the battery pack mounting part. When the is connected, an AC voltage input from a positive input terminal and a negative input terminal is input to a rectifier circuit inside the housing and converted into a DC voltage. According to 4th invention, the subject of providing the electric equipment main body which can operate | move by any of a battery pack or an alternating current power supply device can be solved by providing said characteristic. According to the fourth invention, when the AC power supply device is connected, the positive input terminal and the negative input terminal are not exposed to the outside, and the positive input terminal and the negative input terminal are prevented from being damaged or dirty. In addition, there is an effect that the number of terminals necessary for connecting the AC power supply device can be reduced.

According to the fifth aspect of the present invention, a case that can be attached to the battery pack attachment portion of the electric device main body, a power cord having one end connected to the case and a plug portion that can be connected to a commercial AC power source at the other end, and the case are provided. A connection adapter comprising a first adapter side terminal and a second adapter side terminal that are output terminals connected to the power cord and output an alternating voltage to the electric equipment body side. In addition, a case that can be attached to the battery pack attachment portion of the electric device body, a power cord having one end connected to the case and a plug portion that can be connected to a commercial AC power source at the other end, and a power cord provided in the case and connected to the power cord An electrical terminal having a first adapter side terminal and a second adapter side terminal for outputting an alternating voltage to the electrical equipment body side, wherein the electrical adapter is connected to the battery pack mounting portion. When attached, the first adapter side terminal is connected to the positive input terminal and the second adapter side terminal is connected to the negative input terminal, so that the AC voltage input from the power cord is input to the rectifier circuit. Configured. The battery pack mounting portion of the electric device main body is provided with a device-side rail that guides the connection adapter, and the connection adapter case is provided with an adapter-side rail that engages with the device-side rail.

According to the sixth aspect of the invention, the first device side terminal and the second device side terminal for inputting commercial AC power from the outside, separately from the positive electrode input terminal and the negative electrode input terminal, to the battery pack mounting portion of the electric device body. And a rectifier circuit capable of converting an AC voltage into a DC voltage in a circuit connected from the first device side terminal and the second device side terminal to the motor inside the housing. The AC voltage input from the first device side terminal and the second device side terminal is input to the rectifier circuit inside the housing and converted into a DC voltage when the power supply device is connected to . In the battery pack mounting portion, a device-side rail for guiding the battery pack is provided so as to extend in the front-rear direction, and an AC socket is disposed in front of or behind the positive electrode input terminal and the negative electrode input terminal.

According to the seventh aspect of the invention, there is provided an electric device having a power cord connected to the electric device main body, the power cord being connected to an AC socket of the electric device main body, and one end connected to the connector portion. The other end has a plug portion connectable with a commercial AC power source. The terminals provided in the connector section include a first cord side terminal and a second cord side terminal that output an AC voltage input from the power cord to the electric device main body side. When the power cord is attached to the AC socket, the electrical device main body has the first cord side terminal of the power cord connected to the first device side terminal of the AC socket, and the second cord side terminal of the power cord is the second of the AC socket. An AC voltage connected to the device side terminal and input from the first device side terminal and the second device side terminal is input to the rectifier circuit and converted into a DC voltage.

According to the eighth aspect of the invention, there is provided a housing that accommodates a plurality of cell units in which a plurality of cells are connected in series, a 14500 standard lithium ion secondary battery is used as the cell, and n cells connected in series are A battery pack that is accommodated in a housing in units of m pieces each, and the m cell units are connected in parallel to output a low voltage, or the m cell units are connected in series to provide a high voltage. Can be switched. The 14500 standard cell has a diameter of 14 mm, a length of 50 mm, and a rated output of 3.6 V. By setting m = 3 and n = 10, an output of 36 V at a low voltage and 108 V at a high voltage can be obtained. . At this time, the power weight ratio as the battery pack was set to 2173 W / Kg or more and 144 V / Kg or more. In the eighth aspect of the invention, the cell is not limited to the 14500 standard cell, and other standard cells may be used. Further, the number of m (where m ≧ 2) and n are arbitrary. For example, a battery pack in which voltage is switched between 18 V and 36 V with m = 2 and n = 5 may be used, or m = 2 and n = 10. The battery pack may be switched between 36V and 72V, the battery pack may be switched between 54V and 108V with m = 2 and n = 15, or a combination of other voltages.

According to the ninth aspect of the present invention, the voltage switching means is provided in the housing of the battery pack, and the voltage switching means is moved by the switching element extending from the terminal mounting portion of the electric device body to which the battery pack is connected. The output voltage can be switched. The voltage switching means has a movable connector that abuts on the first switching element or the second switching element that is alternatively formed in the terminal mounting portion of the electric device body, and has the first switching element. When the electric device main body is connected, the first switching element contacts the voltage switching means to move the connector to the first position, and the electric device main body having the second switching element is connected. The second switching element contacts the voltage switching means to move the connector to the second position. Further, the terminal mounting portion of the electric device main body is formed with a positive electrode terminal and a negative electrode terminal separated in a direction intersecting with the connection direction, and the first switching element or the negative electrode terminal between the positive electrode terminal and the negative electrode terminal in the intersecting direction A second switching element is arranged. In this intersecting direction, the first switching element and the second switching element are arranged at different positions.

According to the tenth invention, the voltage switching means is connected by a seesaw-type rocking member, a plurality of connectors radially arranged toward both sides facing the rocking shaft of the rocking member, and the connectors. Or it has the contact (electrode) interrupted | blocked. Here, a click mechanism or a latch mechanism is provided on the swing shaft of the swing member, and the swing member does not swing unless a torque greater than a predetermined value is applied to the swing member by the first switching element or the second switching element. It should be configured so that it does not move.

According to the eleventh aspect of the invention, the battery pack has a weight of 800 g or less and can output 100 V or more. Using such a battery pack, the weight on the electric device main body side was set to 1200 g or less, and a total of 2000 g or less of portable electric devices and electric tools could be realized. In addition, since the drive voltage of the brushless motor in an electric device having a motor, that is, an electric tool is equal to or higher than a commercial voltage of 100 V or more, both the DC input terminal and an AC input terminal to which an AC power source can be connected are provided in the electric tool body. Thus, the brushless motor can be driven by selectively supplying power from one of the battery pack and the AC power supply. The AC power is supplied to the AC input terminal via a power cord having a detachable connector portion. The socket part connected to the connector part may be provided in a battery pack mounting part of the electric power tool body and not exposed when the battery pack is mounted. Moreover, you may comprise so that the socket part connected with a power cord may be provided in the position which can be connected also at the time of mounting | wearing of a battery pack among the housings of an electric tool main body.

According to the twelfth invention, in the electric tool that can be driven by any power source of the battery pack or the AC power source, the switching element is provided in the circuit from the DC input terminal to the brushless motor, and the battery pack is connected to the DC input terminal. When connected and the AC power supply is connected to the AC input terminal, the control unit cuts off the switching element so that power is supplied from the AC power supply to the brushless motor. Further, the power tool is provided with an inverter circuit that generates a drive current for driving a brushless motor having a plurality of semiconductor switching elements, and a diode bridge circuit that rectifies an AC power source and supplies a DC current to the inverter circuit, The outputs of the DC input terminal and AC input terminal are supplied to the inverter circuit via a diode bridge circuit. Furthermore, the AC input terminal is provided in a dummy case that has the same shape as the battery pack and does not contain cells inside, and the connector part is connected to the dummy case as an AC input terminal, and the connection terminal group of dummy cases compatible with the battery pack The power may be supplied to the diode bridge circuit via the.

According to the thirteenth aspect of the present invention, a motor, a housing for housing the motor, the housing having a handle portion extending in a substantially vertical direction, and an operation of the motor provided on the front portion of the handle portion at an upper portion of the handle portion are controlled. A positive input terminal and a negative input that can be connected to the positive terminal and the negative terminal on the battery pack side when the battery pack is installed in the battery pack mounting part. A battery pack mounting portion having a terminal, and provided with a first terminal and a second terminal for inputting commercial AC power from the outside to the housing below the handle portion using a power cord The circuit connected from the first terminal and the second terminal to the motor is provided with a rectifier circuit capable of converting an AC voltage into a DC voltage. Further, a connector portion that can be attached to the AC socket of the electric device body, a power cord having one end connected to the connector portion and a plug portion connectable to a commercial AC power source at the other end, and a terminal provided on the connector portion, It comprised so that the 1st terminal and 2nd terminal which output the alternating voltage input from a power cord to the electric equipment main body side may be provided.

According to a fourteenth aspect of the present invention, there is provided an electric device system including a variable battery pack, a high voltage electric device main body connectable to the variable battery pack, and a power adapter connectable to the high voltage electric device main body. The pack has a plurality of cell units and is in a low voltage state in which a plurality of cell units are connected in parallel to output a low voltage, or a plurality of cell units are connected in series to each other to output a high voltage. The voltage state can be switched. In addition, the high-voltage electrical device main body can be connected to only one variable battery pack, and when the variable battery pack is connected, the variable battery pack is configured to be switched to a high voltage state. When connected to the high-voltage electrical equipment body, the power input from the commercial power supply is configured to be output to the high-voltage electrical equipment body.

ADVANTAGE OF THE INVENTION According to this invention, the electric equipment main body which can operate | move with either a battery pack or an alternating current power supply device can be provided. Moreover, according to this invention, the battery pack which can be used for a heavy load operation | work and an electric equipment using the same can be provided.

It is a figure for demonstrating the mounting condition to the electric tool of the battery pack which concerns on this invention. It is a perspective view which shows the shape of the battery pack mounting part 10 of the electric tool main body 1 of FIG. It is a figure which shows electric tool main body 30A, Comprising: (1) is a side view in the state electrically fed from the power cord 90, (2) is a bottom view of the battery pack mounting part 40, (3) is a power supply It is a figure which shows the shape of the code | cord | chord 90 and the connector part 93. FIG. 3 is a block diagram illustrating a configuration of a drive control system of a motor 35. FIG. It is a figure for demonstrating the connection condition of the power cord 90 to an electric tool main body, Comprising: (1) is an example of a connection in 30 A of electric tool main bodies, (2) and (3) are the electric motors which concern on the modification. It is a figure which shows the example of a connection to the tool main bodies 30B and 30C. (1) is a circuit block diagram of a drive control system of the electric tool main body 30B, and (2) is a circuit block diagram of a drive control system of the electric tool main body 30C. It is a perspective view which shows the external appearance shape of the battery pack 100 of a 1st Example. 2A and 2B are views showing a cell pack 150 housed in the battery pack 100, wherein FIG. 1A is a perspective view, and FIG. 2B is a side view of the cell pack 150 viewed from the axial direction of the cell 151; (1) is a figure which shows the state of the terminal part 20A vicinity at the time of mounting the battery pack 100 to the electric tool main body of rating 36V, (2) is the connection circuit diagram. (1) is a figure which shows the state of the terminal part 80 vicinity at the time of mounting the battery pack 100 in the electric tool main body of rated 108V, (2) is the connection circuit diagram. It is a perspective view which shows the shape of the battery pack 200 which concerns on 2nd Example, and the terminal part connected to it, (1) shows the state at the time of connecting to the electrical equipment of rating 36V, (2) is rated The state at the time of connecting to the 108V electric equipment is shown. FIG. 12 is a connection circuit diagram of the battery pack 200 of FIG. 11. FIGS. 13A and 13B are diagrams illustrating the shapes of terminals 231 to 235 in FIG. 12, in which (1) is a top view and (2) is a side view of the terminal group 232 (a view from the direction B in FIG. 1). It is a figure which shows the state when the battery pack 200 is mounted | worn in the

terminal parts

270 and 280, (1) is a 36V output state, (2) is a 108V output state. It is a figure for demonstrating the circuit diagram of

battery pack

200A, 200B only for 108V which concerns on the modification of 2nd Example, (1) shows the case where the same terminal part 280 as FIG.11 and FIG.12 is used, (2) shows a case where the terminal portion 280A of the modification is used.

Embodiments of the present invention will be described below with reference to the drawings. In the following drawings, the same portions are denoted by the same reference numerals, and repeated description is omitted. In this specification, an electric tool that operates on a battery pack will be exemplified and described as an example of an electric device. The front, rear, left, right, and up and down directions when viewed in FIG. 3 are described as the directions shown in FIG. 3 with respect to the mounting direction of the battery pack. For convenience of explanation, the battery pack mounting direction is described as a direction based on a situation in which the battery pack side is moved without moving the power tool main body side.

FIG. 1 is a view for explaining a mounting state of a battery pack according to the present embodiment to an electric tool. An electric tool that is one form of electric equipment is a tool that has a battery pack and fastens bolts, nuts, screws, and the like with a tip tool such as a bit, and is called a so-called impact tool. At the tip of the electric power tool body 1, an output shaft having a hexagonal mounting hole having a cross-sectional shape perpendicular to the axial direction is provided. A tip tool holding portion 8 is formed in which a tip tool 9 such as a driver bit can be attached to or detached from the mounting hole. The electric power tool main body 30 is a tool that performs tightening work such as bolts and nuts (not shown) by applying rotational force and axial striking force to a tip tool such as a socket wrench (not shown). These electric power tool

main bodies

1 and 30 are provided with

housings

2 and 32 which are outer frames forming an outer shape, and handle

portions

3 and 33 are formed in the

housings

2 and 32. An operator holds the power tool

main bodies

1 and 30 with one hand or with one hand and attaches the other hand. The electric power tool

main bodies

1 and 30 drive a motor (not shown) housed in the

housings

2 and 32 using a direct current supplied from the

battery pack

15 or 100 as a power source. Trigger-like operation switches 4 and 34 are provided in the vicinity of the

handle portions

3 and 33 where the index finger hits when the operator grips the battery pack 15 and the battery packs 15 and 33 are provided below the

handle portions

3 and 33. Battery

pack mounting portions

10 and 40 for mounting 100 are formed.

The electric power tool body 1 is an electric device that uses a battery pack 15 according to the prior art having a rated voltage of 36 V, and drives a motor as a load device. Accordingly, the battery pack 15 can be mounted on the battery pack mounting portion 10 of the 36V-compatible electric device (power tool main body 1) as in the combination of arrows a. On the other hand, the power tool main body 30 requires a high voltage equivalent to a commercial voltage of a rated voltage of 108V, and the battery pack 100 capable of outputting 108V is mounted on the battery pack mounting portion 40 as indicated by an arrow b1. In the battery pack 100 capable of outputting a high voltage, 30 lithium ion battery cells with a rating of 3.6 V are accommodated. As described above, in the power tool

main bodies

1 and 30, it is normal to install the dedicated battery packs 15 and 100 corresponding to the rated voltage, but in this embodiment, the battery pack 100 is configured to support a plurality of voltages, By enabling output at a low voltage, the battery pack 100 can be attached to the 36V-compatible power tool body 1 as indicated by an arrow b2. In order to allow the battery pack 100 to be mounted on the power tool

main bodies

1 and 30 having different voltages as indicated by arrows b1 and b2, the battery

pack mounting portions

10 and 40 have substantially the same shape. It is important to be able to switch 100 voltages. In addition, when the set voltage of the battery pack 100 does not correspond to the voltage of the electric device or power tool to be mounted, the battery pack 100 cannot be mounted or configured so that it does not operate even if it can be mounted. is important. In addition, although the electric tool

main bodies

1 and 30 were shown as an example of an electric equipment main body in the example of FIG. Any electrical device that converts light energy is conceivable.

FIG. 2 is a perspective view showing the shape of the battery pack mounting portion 10 of the electric power tool body 1. The electric power tool main body 1 shown here is an impact driver, and is provided with a handle portion that extends downward from the body portion of the housing 2, and a battery pack mounting portion 10 is formed below the handle portion. A trigger switch 4 is provided on the handle portion. An anvil (not shown) as an output shaft is provided on the front side of the housing 2, and a tip tool holding portion 8 for mounting the tip tool 9 is provided at the tip of the anvil. Here, a plus driver bit is attached as the tip tool 9. In addition to electric tools, in general electrical equipment using battery packs, a battery pack mounting portion 10 corresponding to the shape of the battery pack to be mounted is formed, and a battery pack that does not match the battery pack mounting portion 10 is mounted. Configure so that it cannot. In the battery pack mounting portion 10,

rail grooves

11a and 11b extending in parallel in the front-rear direction are formed in inner wall portions on both the left and right sides, and a terminal portion 20 is provided therebetween. The terminal portion 20 is manufactured by integral molding of a non-conductive material such as a synthetic resin, and a plurality of metal terminals such as a positive electrode input terminal 21, a negative electrode input terminal 22, and an LD terminal (abnormal signal terminal) 23 are cast therein. It is. The terminal portion 20 is formed with a vertical surface 20a that serves as an abutment surface in the mounting direction (front-rear direction) and a horizontal surface 20b. The horizontal surface 20b is adjacent to the upper surface 115 (described later in FIG. 3) when the battery pack 100 is mounted. , It becomes the opposite surface. On the front side of the horizontal surface 20b, a curved portion 12 that comes into contact with a raised portion 132 (described later in FIG. 7) of the battery pack 100 is formed, and a protruding portion 24 is formed near the left and right center of the curved portion 12. The projecting portion 24 also serves as a screw boss for the housing of the electric power tool main body 1 formed in two parts in the left-right direction, and also serves as a stopper for restricting relative movement in the mounting direction of the battery pack 100. The width S1 in the left-right direction of the protrusion 24 is a width corresponding to a stopper portion 131 (described later in FIG. 7) formed on the battery pack 100 side.

3A and 3B are views showing another power tool main body 30A compatible with 108V, in which FIG. 3A is a side view in a state where power is supplied from the power cord 90, and FIG. 3B is a bottom view of the battery pack mounting portion 40. (3) is a diagram showing the shapes of the power cord 90 and the connector section 93. The electric tool main body 30A is a brushless motor whose motor is used with a specification equivalent to AC 100V, for example, a brushless DC motor driven by an inverter circuit (described later in FIG. 4). Therefore, the direct current 108V output from the battery pack 100 is input to the inverter circuit, or a commercial power supply (AC power supply device) such as an alternating current 100V (60 Hz) is rectified by a rectifier circuit described later, and then the inverter circuit. To enter. As described above, by increasing the output voltage of the battery pack 100 to the same level as the commercial voltage, it is possible to realize a high-power electric tool main body 30A for both AC / DC that operates with both the battery pack and the commercial voltage. The power cord 90 attached to the power tool main body 30A has two

terminals

92a and 92b on one side of the connection cord 94, and has a plug portion 91 to be attached to an outlet of a commercial power source. A connector portion 93 connected to the power tool main body 30A is formed. In the present embodiment, the place where the connector portion 93 is connected is disposed in the battery pack mounting portion 40 after the battery pack 100 is removed. That is, when connecting the power cord 90 to the power tool main body 30A, it is necessary to remove the battery pack 100 from the power tool main body 30A. Conversely, when attaching the battery pack 100 to the power tool main body 30A, the power cord 90 Need to be removed.

FIG. 3B is a view of the battery pack mounting portion 40 of the electric power tool main body 30A as viewed from below, and is a view taken in the direction of arrow A in FIG. This figure shows a state in which both the battery pack 100 and the power cord 90 are removed. The battery pack 100 is mounted on the battery pack mounting portion 40 such that the battery pack 100 is slid from the rear side to the front side (right to left in the figure). Therefore, an opening is formed on the mounting surface 40a on the upstream side in the mounting direction, and two rail grooves (device side rails) 48a and 48b are formed on the side. Further, a recessed portion 40b formed so as to be recessed upward is formed on the upstream side (rear side portion) from the opening portion. A terminal portion 41 connected to the positive electrode terminal and the negative electrode terminal of the battery pack 100 is provided near the center of the portion sandwiched between the

rail grooves

48a and 48b of the mounting surface 40a. In this embodiment, an AC socket 49 is provided at a portion slightly rearward of the terminal portion 41. The AC socket 49 is formed with a pin-like first device side terminal 49a, second device side terminal 49b, and third device side terminal 49c in the circumferential direction.

FIG. 3 (3) is a diagram showing the shape of the connector portion 93 of the power cord 90. The left side is a view of the connector portion 93 as viewed from the outside in the longitudinal direction, and the right side is the entire power cord 90 including the connector portion 93. It is a side view which shows a shape. A male screw is formed on the outer peripheral surface of the connector main body 93a, and a cylindrical fixing screw 93b is relatively rotatable on the outer peripheral side of the male screw and is held in a state where the amount of movement in the axial direction is limited. The outer shape of the connector portion 93 is circular, and three female terminals, a first cord side terminal 95a, a second cord side terminal 95b, and a third cord side terminal 95c are arranged side by side in the circumferential direction in the inner circumferential portion. The Here, in order to supply commercial power, only the first cord side terminal 95a and the second cord side terminal 95b need to be connected, and the third device side terminal 49c connected to the third cord side terminal 95c The power tool main body 30A may be in a non-wiring state, or may be used as a ground wire. The fixing screw 93b holds the power cord 90 so as not to fall out of the electric power tool main body 30A. Screw together. In this way, after the connector main body 93a is inserted into the AC socket 49, the power supply cord 90 can be fixed so as not to come off from the electric tool main body 30A by tightening the fixing screw 93b and screwing it with the male screw on the AC socket 49 side. . In FIG. 3, the electric tool main body 30A has been described as an example of the electric device main body. However, any electric device main body that has the battery pack mounting portion 40 and can be mounted with the battery packs 1 and 30 will be described. When the pack is mounted on the battery pack mounting portion 40, the power cord 90 can be connected to a location that is not exposed to the outside. In FIG. 3, the power cord 90 corresponds to the AC power supply device of the present invention, but the fixing method of the power cord 90 and the power tool main body 30 </ b> A is not a screw type, but the fitting pressure of the terminal portion. It may be a power cord that is held by a power cord, or may be a power cord that uses another known fixing or holding method.

Next, the configuration and operation of the drive control system of the motor 35 will be described with reference to FIG. FIG. 4 is a block diagram showing the configuration of the drive control system of the motor 35. In the electric power tool of the present embodiment, a brushless motor 35 is generated by generating an excitation current from the DC supplied from the battery pack 100 using an inverter circuit 70 and flowing the excitation current to a predetermined coil of the motor 35 while switching the excitation current. Rotate. Input from the battery pack 100 is input via a positive electrode input terminal 81 connected to the positive electrode terminal 161 of the battery pack 100 and a negative electrode input terminal 82 connected to the negative electrode terminal 162 of the battery pack 100. The motor 35 can be, for example, an inner rotor type, and includes a rotor (rotor) 35a including a plurality of sets (two sets in this embodiment) of permanent magnets (magnets) including N poles and S poles. In order to detect the rotational position of the stator 35b composed of three-phase stator windings U, V, and W connected in a star connection and the rotational position of the rotor 35a, the stator 35b is arranged at predetermined intervals, for example, at an angle of 60 °. The three rotational position detecting elements (Hall elements) 65 are provided. These outputs are converted into a pulse train by the rotational position detection circuit 53 and output to the calculation unit 51. The rotation speed detection circuit 54 detects the rotation speed of the motor 35 using the output of the rotation position detection circuit 53 and outputs it to the calculation unit 51. The calculation unit 51 determines the energization direction and time for the stator windings U, V, and W using these outputs.

The control signal output circuit 52 forms a drive signal for switching predetermined switching elements Q1 to Q6 in accordance with an instruction from the calculation unit 51 based on the output signals of the applied voltage setting circuit 58 and the rotational position detection circuit 53, and driving the drive signal. The signal is output to the inverter circuit 70. Inverter circuit 70 includes six switching elements Q1-Q6 such as IGBTs connected in a three-phase bridge format. Each gate of the switching elements Q1 to Q6 is connected to the control signal output circuit 52, and each emitter or each collector is connected to the stator windings U, V, and W connected in a star connection. As a result, the six switching elements Q1 to Q6 perform a switching operation according to the switching element drive signals (drive signals such as H1 to H6) input from the control signal output circuit 52, and are applied to the inverter circuit 70. 100 DC voltages are applied to the stator windings U, V, and W as three-phase (U-phase, V-phase, and W-phase) voltages Vu, Vv, and Vw.

The calculation unit 51 sets whether or not the trigger 34A (or the operation switches 4 and 34 in FIG. 1) for operating the operation switch 56 is operated by the switch operation detection circuit 57, and changes depending on the amount of operation (stroke). Based on the signal from the applied voltage setting circuit 58, the pulse width (duty ratio) of the PWM signal is changed, and the gates of the six switching elements Q1 to Q6 are driven via the control signal output circuit 52. By this drive control, the power supply amount to the motor 35 is adjusted, and the start / stop of the motor 35 and the rotation speed are controlled. Here, the PWM signal is supplied to any one of the positive power supply side switching elements Q1 to Q3 or the negative power supply side switching elements Q4 to Q6 of the inverter circuit 70, thereby switching the switching elements Q1 to Q3 or the switching elements Q4 to Q6 at high speed. As a result, the amount of power supplied to the stator windings U, V, W from the DC voltage of the battery pack 100 is controlled.

Although not shown, the calculation unit 51 is configured to include a microcomputer for outputting a drive signal based on a processing program and data. The calculation unit 51 includes a ROM for storing processing programs and control data, a RAM for temporarily storing data, a timer, and the like. The voltage across the capacitor 61 is detected by the voltage detection circuit 59 as the voltage of the input power supply and output to the calculation unit 51.

The power of the power tool main body 30A can be supplied using not only the battery pack 100 but also the power cord 90, and the first device side terminal 49a of the AC input AC socket 49 provided on the power tool main body 30A and the first power terminal 90a. The 2 device side terminal 49 b is connected to the input side of the diode bridge 60. The diode bridge 60 is a rectifier circuit that allows full-wave rectification using four rectifier diodes so that current flows only in one of them, and converts an AC voltage into a DC voltage. The output of the diode bridge 60 is connected to the inverter circuit 70. Since the output of the diode bridge 60 is a pulsating flow, a smoothing circuit may be interposed between the diode bridge 60 and the inverter circuit 70. The magnitude of the current flowing through the inverter circuit 70 is measured by the current detection circuit 55 using the shunt resistor 62, and the value is fed back to the calculation unit 51 so that the set drive power is applied to the motor 35. To be adjusted.

FIG. 5 is a diagram for explaining the connection status of the power cord 90 to the power tool body. (1) is a connection example in the power tool body 30A, and (2) and (3) are modified examples thereof. It is a figure which shows the example of a connection to the electric tool

main bodies

30B and 30C which concern on. The power tool

main bodies

30B and 30C differ only in the connection position and connection method of the power cord 90, and other configurations not related to the connection of the power cord 90 are the same as the configurations of the power tool main body 30A shown in FIG. Accordingly, it is possible to mount the voltage-switchable battery pack 100 shown in FIG. 1 on any of the power tool main bodies 30A to 30C. Although not shown here, a fixed voltage 108V battery pack and battery packs 200 and 300 described in Examples 2 and 3 described later can be attached to the power tool main bodies 30A to 30C. In addition, since the battery packs 200 and 300 can be mounted, it is needless to say that the shape of the battery pack mounting portion 40 needs to be formed corresponding to the battery pack to be mounted.

In the form of this embodiment shown in FIG. 5A, since the AC socket 49 (see FIG. 3) is provided in the battery pack mounting portion 40, the power cord 90 cannot be mounted when the battery pack 100 is mounted. . Further, the battery pack 100 must be removed when the power cord 90 is attached. As described above, since the AC socket 49 for the power cord 90 is provided at a position that cannot be accessed when the battery pack 100 is mounted, the power supply from the battery pack 100 and the power supply from the power cord 90 are reliably distinguished from each other without error. Either one can be selected. Further, since the brushless motor having a rated input voltage of 100 V or more is mounted on the electric tool main body 30, it can be driven by a commercial AC power source or can be driven by the battery pack 100. An electric tool was realized.

The power cord 90 may be long enough to allow the operator to work while holding the handle 33 of the power tool main body 30A with one hand. In the temporary work, if the power cord 90 is removed and the battery pack 100 is attached, the work can be performed in the same way without worrying about a decrease in the output of the power tool main body 30A. In addition, the power cord 90 is connected to the power tool main body 30A in the form shown in FIG. 5A in order to remove the battery pack 100 when working with an AC power source, so that the weight of the power tool main body 30A is reduced. There is an advantage. Furthermore, when switching from the power cord 90 to the operation using the battery pack 100, the battery pack 100 cannot be attached unless the power cord 90 is removed, so that it is possible to reliably prevent forgetting to remove the power cord 90. Further, since the AC socket 49 is not exposed to the outside when the battery pack 100 is mounted, the risk of the AC socket 49 being exposed to dust, water, or the like can be greatly reduced, and a cover that covers the AC socket 49 can also be installed. Can be omitted.

FIG. 5 (2) shows a power tool body 30B according to a modification of the power tool body 30A shown in FIG. 1 (1). Here, the AC socket 49A is positioned on the lower surface of the housing of the power tool body 30B. Thus, the battery pack 100 is formed on the front side. A bottom view of the AC socket 49A is shown in a frame below the reference numeral 49A. As can be understood here, the shape of the AC socket 49A is completely the same as that of the AC socket 49 shown in FIG. 3B, and the first device side terminal 49a and the second device side connected for supplying commercial power are connected. In addition to the terminal 49b, a third device side terminal 49c is provided. It is arbitrary whether the third device side terminal 49c is wired in the electric power tool main body 30B or in a non-wiring state. If arranged in this way, the power cord 90 can be connected with the battery pack 100 mounted. In order to prevent the AC socket 49A from being exposed to the outside when the power cord 90 is removed, any cap or cover that closes the opening of the AC socket 49A may be provided. In this embodiment, since the output voltage of the battery pack 100 is 108 V when DC is connected, and the commercial AC power is AC 100 V to 120 V, the power tool body 30B can be driven using both inputs arbitrarily. it can. However, when both power sources can be used, it is preferable to use commercial AC power supplied from the power cord 90 because the discharge of the battery pack 100 can be prevented. Therefore, in the electric power tool main body 30B according to FIG. 5 (2), when the battery pack 100 and the commercial AC power are both available, an automatic input switching unit is provided that uses the commercial AC power side. 5 (1) and 5 (2), the power cord 90 corresponds to the AC power supply device of the present invention.

FIG. 6 (1) is a circuit block diagram of the drive control system of the electric power tool main body 30B shown in FIG. 5 (2). Although basically the same as the circuit shown in FIG. 4, a semiconductor switching element 66 such as an IGBT (insulated gate bipolar transistor) is interposed in the middle of the positive input line from the battery pack 100. The gate signal of the switching element 66 is connected to the control signal line 66a from the calculation unit 51, and the calculation unit 51 controls connection or disconnection between the source and drain terminals of the switching element 66. Further, a battery voltage detection circuit 67 that monitors the voltage of the battery pack 100 and a commercial power supply detection circuit 68 that monitors the presence or absence (or voltage) of an AC voltage are provided, and their outputs are input to the calculation unit 51. When the commercial power source 99 is in a usable state, the computing unit 51 shuts off the input circuit from the battery pack 100 by turning off the gate signal of the switching element 66. On the other hand, when the commercial power supply 99 becomes unusable, the calculation unit 51 turns on the gate signal of the switching element 66 to bring the input circuit from the battery pack 100 into a connected state.

With such a circuit configuration, when the battery pack 100 is connected to the power tool main body 30B, a direct current of 108V (rated) is supplied. When power is supplied and the power cord 90 is removed, the driving is automatically switched to the battery pack 100, so that the user-friendly power tool body 30B can be realized. In addition, since it is not necessary to worry about the attachment / detachment of the battery pack 100 and the connection state of the power cord 90, particularly forgetting to remove the other when one is connected, it is easy to handle the attachment and removal of the battery pack 100. In the example of FIG. 6, the input voltage automatic switching means is configured to be controlled by the calculation unit 51 using the switching element 66, but may be realized by other methods. For example, using relay means that operates according to the output voltage of the diode bridge 60, when there is an output of the diode bridge 60, the output of the diode bridge 60 is connected to the inverter circuit 70, and the battery pack 100 and the inverter circuit 70 are connected. Disconnect from the. On the other hand, when the plug 91 (see FIG. 5) of the power cord 90 is removed from the outlet, the output voltage from the inverter circuit 70 becomes zero. Therefore, the switching operation of the relay means switches between the diode bridge 60 and the inverter circuit 70. What is necessary is just to comprise so that a connection may be interrupted | blocked and the output of the battery pack 100 may be connected to the inverter circuit 70. FIG. You may comprise so that LED may display during the drive by the identification means which shows which electric tool 30B in use is operating with, for example, commercial alternating current power.

Returning again to FIG. FIG. 5 (3) shows a power tool main body 30C according to another modification of the present embodiment. The power tool main body 30C is the same as (1) and (2) in the figure in that it can be driven by a DC 108V battery pack 100 and driven by an AC power source via a power cord 90. A connection adapter 75 is used for connection. Here, the connection adapter 75 is a so-called dummy case for connecting the two output lines from the power cord 90 to the positive input terminal 81 and the negative input terminal 82 for the battery pack 100. The external shape of the connection adapter 75, particularly the upper half shape (upper case) is configured to be compatible with the battery pack 100, but no battery cell is accommodated therein. The shape of the lower case of the connection adapter 75 is arbitrary, but the case shape of the connection adapter 75 by the upper case and the lower case may be the same as that of the battery pack 100. Further, since the power tool main bodies 30A to 30C include the rectifier circuit using the diode bridge 60, it is not necessary to include the rectifier circuit in the connection adapter 75. It is not excluded that the auxiliary electric circuit for assisting the operation of the electric circuit included in the power tool main bodies 30A to 30C is disposed in the connection adapter 75. In the connection adapter 75, rails (adapter side rails) (not shown) are formed on both the left and right sides of the upper stage surface, and the rails on the adapter side rails are formed on the electric device main body 30B side (the shape is shown in FIG. 3B). Engaging the

rail grooves

48a and 48b). The connection adapter 75 is provided with the same latch mechanism as that of the battery pack 100, and is provided with a latch button 78 for operation thereof. A plurality of slots (not visible in the figure) are formed in the area surrounded by the rails arranged on both the left and right sides, and only two of the positive terminal and the negative terminal are formed in a portion accessible from two slots. (Described later in FIG. 6B). An AC socket 79 having the same shape as the AC socket 49 shown in FIG. 3B is provided on the lower surface of the case of the connection adapter 75. A bottom view of the AC socket 79 provided on the lower surface of the connection adapter 75 is shown in a frame below the reference numeral 79 in FIG. As can be understood here, the shape of the AC socket 79 is completely the same as that of the AC socket 49 shown in FIG. 3B, and the first adapter side terminal 79a and the second adapter side connected for supplying commercial power. In addition to the terminal 79b, a third adapter side terminal 79c is provided. It is arbitrary whether the third adapter side terminal 79c is wired in the connection adapter 75 and connected to any terminal to the power tool main body side or is in a non-wiring state. Here, the first adapter side terminal 79a of the AC socket 79 is connected to the positive input terminal 81 (see FIG. 4) on the power tool 30 side via the adapter side positive terminal 77a by the power line 76a wired in the connection adapter 75. Connected. Similarly, the 2nd adapter side terminal 79b is connected to the negative electrode input terminal 82 (refer FIG. 4) by the side of the electric tool 30 via the adapter side negative terminal 77b by the power line 76b wired in the connection adapter 75. FIG. In FIG. 5 (3), the power cord 90 and the connection adapter 75 correspond to the AC power supply device of the present invention. The power cord 90 is configured to be detachable on the lower surface of the connection adapter 75 using the AC socket 79 and the connector portion 93. However, the connection adapter 75 and the connection cord 44 are directly connected and directly connected from the case of the connection adapter 75. The cord 44 may be configured to extend. Further, in order to prevent the AC socket 79 from being exposed to the outside when the power cord 90 is removed, a cap or cover that closes the opening of the AC socket 79 may be provided.

The circuit diagram of the power tool main body 30C is such that the input path of the battery pack 100 is changed in the block diagram shown in FIG. 4 so that the battery pack 100 is connected to the inverter circuit 70 via the diode bridge 60 when the battery pack 100 is used. did. FIG. 6 (2) is a circuit block diagram of a drive control system of the electric power tool main body 30C shown in FIG. 5 (3). The circuit is basically the same as the circuit shown in FIG. 4, but wiring is performed so that the positive terminal 161 and the negative terminal 162 of the battery pack 100 are attached to the

input terminals

81 and 82 of the diode bridge 60. Since the battery pack 100 has a direct current of 108 V, there is no problem even if it is connected to the inverter circuit 70 via the diode bridge 60. In addition, the connection adapter 75 is attached, the adapter-side positive terminal (first terminal) 77a formed on the connection adapter 75 is connected to the positive input terminal 81, and the adapter-side negative terminal (second terminal) 77b is connected to the negative input terminal. Even if 82 is mounted, the alternating current is rectified by the diode bridge 60, so that the motor 35 can be driven by operating the inverter circuit 70 in the same manner. Since the battery cell is not included in the connection adapter 75, other signal transmission connection terminals other than the adapter-side positive terminal 77a and the adapter-side negative terminal 77b may not be provided. However, any of the connection terminals may be used to identify the power adapter body 30C side that the connection adapter 75 is connected. In this embodiment, the brushless DC motor is driven through the DC input of 108V DC and the inverter circuit 70. However, the type of the motor to be used is not limited to the brushless motor but is driven at about 100 to 120V AC. Another motor, for example, an AC commutator motor may be used. With this configuration, an electric tool using an AC commutator motor can be driven by the battery pack 100, and an AC / DC shared electric tool can be easily realized.

Next, the battery pack 100 in which the output voltage can be switched between 36V and 108V will be described with reference to FIGS. FIG. 7 is a perspective view showing the external shape of the battery pack 100. The casing of the battery pack 100 is formed by a lower case 101 and an upper case 110 that are divided in the vertical direction, and the lower case 101 and the upper case 110 are fixed by four screws (not shown). The upper case 110 is formed with a mounting portion in which two

rails

138 a and 138 b are formed to be attached to the battery pack mounting portion 40. The

rails

138a and 138b on the battery pack side are formed in parallel to the mounting direction of the battery pack 100 and parallel to the left and right side surfaces of the upper case 110. The

rails

138a and 138b are formed corresponding to the

rail grooves

48a and 48b (see FIG. 3B) formed in the battery pack mounting portion 40 of the electric power tool body 30, and the

rails

138a and 138b are formed in the

rail grooves

48a and 48b. The battery pack 100 is fixed to the electric power tool body 30 by operating the latch mechanism in the state of being fitted. A flat lower step surface 111 is formed on the front side of the upper case 110, and an upper step surface 115 formed higher than the lower step surface 111 is formed near the center. A connecting portion between the lower step surface 111 and the upper step surface 115 becomes a step portion 112 formed in a step shape, and a region on the front side of the upper step surface 115 from the step portion 112 becomes a slot group arrangement region 120 (see FIG. 7B). In the slot group arrangement region 120, a plurality of slots (121 to 124) extending rearward from the front stepped portion 112 are formed. Here, the positive terminal insertion port 121 is disposed on the side closer to the left rail 138b, and the negative terminal insertion port 122 is formed on the side closer to the right rail 138a. A low voltage switching member insertion port 123 and a high voltage switching member insertion port 124 are formed at a portion sandwiched between the positive terminal insertion port 121 and the negative terminal insertion port 122. Inside the positive electrode terminal insertion port 121 and the negative electrode terminal insertion port 122, a metal positive electrode terminal and a negative electrode terminal which are not visible in the drawing are arranged. In addition, voltage switching means (to be described later) is arranged in a portion overlapping the positions of the low voltage switching member insertion port 123 and the high voltage switching member insertion port 124 (internal space of the upper case 110). In FIG. 7, the slot group arrangement region 120 is shown to have only four slots (121 to 124), and no slots other than four are shown, but other slots are accommodated. A slot may be formed. Further, as described above, since terminals and voltage switching means (for example, switching terminals) are arranged in the internal space of the upper case 110 where the slot group arrangement area 120 is located, the slot group arrangement area 120 becomes a terminal arrangement area.

On the rear side of the upper surface 115, a raised portion 132 formed so as to be raised is formed. The outer shape of the raised portion 132 is raised above the upper step surface 115, and a recessed stopper portion 131 is formed near the center. The stopper 131 serves as a housing and abutment surface when the battery pack 100 is mounted on the protrusion 24 (see FIG. 2) of the battery pack mounting portion 10, and the protrusion 24 on the power tool body 1 side is the stopper. When inserted until it comes into contact with the portion 131, the terminals 21 to 23 (see FIG. 2) disposed on the electric power tool body 1 and the terminal group disposed on the battery pack 100 come into contact and become conductive. . Inside the stopper portion 131, a slit 134 serving as a cooling air intake port connected to the inside of the battery pack 100 is provided. In addition, the latching portion of the latch 141 of the battery pack 100 protrudes outward in the vertical direction below the

rails

138a and 138b by the action of a spring, and engages with recesses (not shown) formed in the

rail grooves

48a and 48b of the power tool body 30. By combining, the battery pack 100 is prevented from falling off. In a state where the battery pack 100 is mounted on the electric power tool body 1, the slit 134 is covered so that it cannot be seen from the outside. The slit 134 is a wind window used to forcibly flow cooling air into the battery pack 100 when the battery pack 100 is connected to a charger (not shown) to perform charging. When being attached to 30, the slit 134 serving as a cooling air inlet is closed.

In FIG. 7 (1), the terminal part 20A on the side of the electric power tool main body 1 driven at 36V is obtained by fixing a positive electrode input terminal 21 made of metal and a negative electrode input terminal 22 with a terminal mounting part made of synthetic resin. is there. Here, a switching protrusion 24A for switching the output of the battery pack 100 to the low voltage side is further formed. The switching protrusion 24A is a switching element formed integrally with the base portion of the terminal portion 20A, and is made of synthetic resin. The switching protrusion 24A itself only moves the rotary terminal base 171 (see FIG. 9), and is not used as a terminal for transmitting electric power or signals. Alternatively, the base portion may be integrally formed of the same insulating material.

FIG. 7 (2) shows a state in which the terminal 80 is mounted on the power tool main body 30 side driven at 108V. The terminal portion 80 has a metal positive electrode input terminal 81 and a negative electrode input terminal 82 fixed on a base portion made of synthetic resin. Here, a switching projection 84 for switching the output of the battery pack 100 to the high voltage side is further formed. The switching protrusion 84 is a member formed integrally with the base portion of the terminal portion 80 and is made of synthetic resin. According to this embodiment, the external shape of the battery pack 100 is the same for both 36V output and 108V output. An operator does not care about the setting of the output voltage of the battery pack 100, and simply attaches it to the electrical equipment body for 36V or the electrical equipment body for 108V. The optimum output voltage for the selected electrical device body is selected (switched).

FIG. 8 is a perspective view showing an external appearance of a cell pack 150 that is accommodated in the battery pack 100 and in which a plurality of cells 151 are stacked and combined into one pack. FIG. 1A is a perspective view, and FIG. 2B is a side view of the cell 151 viewed from the axial direction. Here, a total of 30 cells 151 made of secondary batteries called 14500 size and having a diameter of 14 mm and a length of 50 mm that can be charged and discharged a plurality of times were stacked. The cell 151 is composed of 10 cells each as one unit, and three cell units 156 to 158 are formed. In each cell unit 156 to 158, the cells 151 are stacked so that the axis A1 of each cell 151 is parallel to each other, and the adjacent cells 151 are arranged so that the directions of the adjacent cells 151 are alternately reversed. A terminal and a negative electrode terminal are connected by a metal thin plate 159 to form 10 serial connections. The outermost cylindrical portion of the stacked cells 151 is covered with a synthetic resin separator 152 serving as an insulator, so that the cells 151 are held so as not to move with respect to the separator 152. When a lithium ion battery (single rated output 3.6V) is used as the cell 151, each cell unit 156 to 158 can output a rating of 36V, so the + output (plus output) of the cell units 156 to 158 , A positive terminal) and a negative output (negative output, negative terminal) are connected in parallel, and an output from the battery pack 100 can be taken out to be used as a 36 V large-capacity power source. On the other hand, if the + outputs and −outputs of the cell units 156 to 158 are connected in series, they can be used as a high-voltage power supply of 108V.

When 30 14500-size cells 151 are stacked, the length in the axial direction is 50 mm, the width direction perpendicular to the axial direction is 124.8 mm, and the height direction perpendicular to the axial direction is 57.3 mm. Further, since the unit weight of the cell 151 is about 23 g, the total weight of the cell 151 is 690 g. In terms of volume, the volume occupied by the cell 151 was 230,907 mm ³ , the volume occupied by the separator 152 was 67,392 mm ³ , and the total volume was 298,299 mm ³ . Therefore, the entire weight of the battery pack 100 can be kept below 800 g or 2 lb (pound). Currently, lithium ion batteries widely used in battery packs for electric tools are so-called 18650 sizes. The 18650 size has a diameter of 18 mm and a length of 65 mm, and slightly exceeds twice the size of the 14500 size by volume. In terms of weight, it is 46 g, twice that of a 14500-size cell. If 30 cells of 18650 size are stacked in order to obtain DC 108V, the weight of the cell alone is 1380 g, and the weight of the battery pack itself becomes heavy, so that the operator can work while holding it with one hand. In such a power tool, the size and weight are not practical.

According to the experiments by the inventors, it has been found that the upper limit at which an operator can work comfortably with one hand is within 2 kg or 5 lb in terms of the total weight of the electric tool after the battery pack is mounted. Therefore, when an output of 108 V is obtained using 30 cells of 18650 size, it is difficult to realize a portable electric tool that can be operated with one hand. In this example, a high-voltage electric tool could be realized while maintaining portability by stacking lithium ion batteries of the same size as a so-called AA dry battery of 14500 size. In the battery pack 100 of the present example, an output voltage equal to or higher than 100V equivalent to that of the AC power source can be reliably ensured, and the cell weight of the cell pack 150 can be suppressed to 0.69 kg. Since a current of about 15 A can be obtained from this lithium ion battery, the power weight ratio as a battery pack is 100 V × 15 A / 0.69 kg = 2173 W / kg or more, and 100 V / 0.69 kg = 144 V / kg or more. Was able to clear. If the battery capacity is more important than the portability that can be carried with one hand, even if the weight is sacrificed, 18650 size battery cells may be used, or battery packs using other size battery cells may be used. .

FIG. 9 (1) is a diagram showing a state when the battery pack 100 is mounted on a power tool body or an electric device body having a rating of 36V. The battery pack 100 includes a voltage switching mechanism 170 for switching whether the outputs of the cell units 156 to 158 are connected in parallel or connected in series. The voltage switching mechanism 170 that is a voltage switching element that switches the output voltage of the battery pack 100 includes a rotary terminal base 171 that is pivotally supported by a swing shaft 172 that is fixed on the substrate 160. 100 is provided in a terminal arrangement area where connection terminals for power supply are arranged in the mounting direction. The rotary terminal base 171 is positioned on the inner peripheral side of the connection terminals 173a to 173d by installing a plurality of rectangular bar-shaped connection terminals 173a to 173d on a member extending in two directions from the swing shaft 172. It is a member for short-circuiting or opening a plurality of contacts and contacts located on the outer peripheral side. The rotary terminal base 171 is made of synthetic resin, and is formed by casting two metal connection terminals 173a to 173d at intervals on one side and the other side of the swing shaft 172. On the side close to the negative electrode terminal 162, the

connection terminals

173a and 173b are arranged so as to expose one side facing the substrate 160, and on the side close to the positive electrode terminal 161, the

connection terminals

173c and 173d face the substrate 160. It arrange | positions so that a side surface may be exposed.

The substrate 160 fixes the positive electrode terminal 161 and the negative electrode terminal 162, and a plurality of electrodes (contact points) 176a to 176j used to establish or change an electrical connection path from these terminals to the cell units 156 to 158. Used to place A plurality of contacts 176a to 176j are provided in an upper part of the substrate 160 and partially overlap with a rotation region of the rotary terminal base 171 and are exposed on the lower surface of the rotary terminal base 171. When the connection terminals 173a to 173d are in contact with any one of the contacts 176a to 176j, the electrical connection path from the positive terminal 161 to the negative terminal 162 is changed. In the electric tool body 1 for 36V, a switching protrusion 24A is formed on the terminal portion 20A. The switching protrusion 24A functions as a switching element or a connecting element for switching the output voltage, and is between the first slot 121 into which the positive input terminal is inserted and the second slot 122 into which the negative input terminal is inserted. It is inserted into a

third slot

123 or 124. When the battery pack 100 is attached to the electric tool body, the switching protrusion 24A pushes the rotary terminal base 171 at the position of the arrow 25, so that the rotary terminal base 171 is counterclockwise as viewed from above. Rotates to the first position shown in FIG. It will be understood that in this first position, the connection terminal 173a shorts the electrodes (contacts) 176d and 176b and the connection terminal 173b shorts the electrodes (contacts) 176e and 176c. Similarly, it can be seen that connection terminal

173c shorts contacts

176i and 176g and connection terminal

173d shorts contacts

176j and 176h. The voltage switching mechanism 170 that is a voltage switching element is disposed so as to be substantially at the same height as the position where the positive electrode terminal 161 and the negative electrode terminal 162 are disposed. For this reason, it is not necessary to change the positional relationship of the steps from the lower step surface 111 to the upper step surface 115 of the battery pack 100.

FIG. 9 (2) shows the connection in the state where the rotary terminal base 171 is rotated counterclockwise by the projection 24A for switching as shown in (1), that is, in the first position. Yes. The + side output of the cell unit 156 is directly connected to the positive terminal 161. The + side output of the cell unit 157 is connected to the contact point 176b, and the + side output of the cell unit 158 is connected to the contact point 176g. The negative output of the cell unit 156 is connected to the contact 176e, the negative output of the cell unit 157 is connected to the contact 176j, and the negative output of the cell unit 158 is directly connected to the negative terminal 162. In this state,

contacts

176d and 176b,

contacts

176e and 176c,

contacts

176i and 176g, and

contacts

176j and 176h are connected. As a result, the cell units 156 to 158 are connected in parallel, and a DC voltage of 36V is output between the positive terminal 161 and the negative terminal 162. When the rotary terminal base 171 is not in the first position, when the battery pack is connected to the 18V electric device main body (first electric device main body), a switching protrusion is provided during the mounting. 24A is engaged with the rotary terminal base 171 and moved to the first position.

FIG. 10A is a diagram illustrating a state when the battery pack 100 is mounted on a power tool body or an electric device body having a rating of 108V. In the power tool rated at 108V, the switching projection 84 is formed on the terminal portion 80, and no projection is formed at the position of the switching projection 24A of the terminal portion 20 of the 36V equipment. The switching protrusion 84 functions as a switching element or a connection element that switches the output voltage, and is between the first slot 121 into which the positive input terminal is inserted and the second slot 122 into which the negative input terminal is inserted. A third slot 124 is inserted. When the battery pack 100 is attached to the electric tool body or the electric device body in this state, the positive electrode input terminal 81 and the positive electrode terminal 161 are in contact with each other, and the negative electrode input terminal 82 and the negative electrode terminal 162 are in contact with each other. By making contact with one arm of the movable terminal base 171 as indicated by an arrow 84a, the rotary terminal base 171 is rotated clockwise as viewed from above and positioned at the second position. By this rotation, the connection relationship between the connection terminals 173a to 173d of the rotary terminal base 171 and the contacts 176a to 176j is switched. FIG. 2B shows the connection state after switching. Here, the position of the rotary terminal base 171 is switched from the first position in FIG. 9 (2) to the second position in FIG. 10 (2), so that the

contacts

176d and 176a, the

contacts

176e and 176b, 176i and 176f and

contacts

176j and 176g are connected. As a result, the cell units 156 to 158 are connected in series, and a positive current of 108 V is output from the positive terminal 161 and the negative terminal 162. It should be noted that a click mechanism or a latch mechanism is provided on the swing shaft 172 of the rotary terminal base 171 that is the swing member, so that a rotation torque greater than a predetermined value is not applied to the swing member by the switching protrusion 24A or the switching protrusion 84. It is good to be constructed so as not to swing. Further, since the

contacts

176a and 176f are electrodes that are not connected anywhere, the risk of a short circuit between adjacent electrodes at the time of switching can be increased by eliminating these contacts and increasing the distance between the

contacts

176b and 176c and the

contacts

176g and 176h. May be reduced.

According to the present embodiment, even in a cordless electric tool, a high voltage equivalent to that of a commercial power source-driven electric tool can be obtained from the battery pack 100, and a high-power portable electric tool or electric device can be realized. Even if the number of cells is increased in order to increase the voltage, 30 lithium cells of 14500 size are used instead of 18650 size cells, so that although it is high output, it is small and light weight, power weight The ratio can be increased. Furthermore, the battery pack 100 according to the present embodiment is provided with a voltage switching element (voltage switching mechanism 170) for switching between parallel connection and series connection inside the battery pack 100 to switch the connection of the cell units 156 to 158 to 36V. Therefore, it is possible to operate a widely used electric tool or electric device with a rated voltage of 36V. Further, in the battery pack 100 of the present embodiment, the voltage switching mechanism 170 that functions as a voltage switching element is disposed at a position that is substantially the same height as the position where the positive electrode terminal 161 and the negative electrode terminal 162 that function as power supply terminals are disposed. Therefore, the size of the battery pack 100 in the vertical direction can be configured compactly.

Next, a second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, as in the first embodiment, a battery pack 200 is provided in which the output voltage can be switched between two levels of 36 V on the low voltage side and 108 V on the high voltage side. FIG. 11 is a perspective view showing the shape of the battery pack 200 and the terminal portion connected to the battery pack 200. (1) shows a state when the battery pack 200 is connected to an electric device rated at 36V, and (2) shows an electric device rated at 108V. The state when connected to is shown. The external shape of the battery pack 200 is basically the same as that of the battery pack 100 of the first embodiment shown in FIGS. 1 to 8 except for a part (the shape in the vicinity of the slot group arrangement region). .

The battery pack 200 accommodates 30 cells 151 of a 14500 size lithium ion battery in a housing formed by joining the lower case 201 and the upper case 210 in the same manner as shown in FIG. If the housing is allowed to be large, the 18650 size may be used as the cell, or cells of other shapes and sizes may be used. The upper case 210 of the battery pack 200 is provided with a mounting mechanism for mounting on the power tool main body 1 or the power tool main body 30 side. The configuration and shape of the battery pack 200 of the first embodiment shown in FIG. The shape of the pack 100 is almost the same. The upper case 210 is formed with a lower step surface 211 for guiding the terminal portion on the electric equipment side, and an upper step surface 215 disposed on the upper step surface 215. A plurality of terminal insertion slots (slots) are formed.

Rail portions

238a and 238b that fit into the electric equipment main body side groove rail grooves are formed on the left and right side edges of the upper surface 215. Here, five terminal insertion openings are illustrated in the left-right direction, but the number of terminal insertion openings arranged is arbitrary and may be further increased. A raised portion 240 is formed on the upper surface 215, and latch portions 241 are provided on the left and right sides of the raised portion 240. The latch portion 241 is interlocked with the latch claw 241a. A stopper portion and a slit as a cooling air inlet are formed in the raised portion 240, but the shape thereof is the same as that of the first embodiment shown in FIG.

FIG. 11 (1) shows a case where it is connected to a 36 V rated electric device main body, the electric power tool main body 1 and the like. The terminal portion 270 provided on the electric device main body 1 side has a narrow width in the left-right direction, and the battery pack 200 is inserted into the two

terminal insertion ports

222 and 224 where the positive electrode input terminal 271 and the negative electrode input terminal 272 are closer to the center. To be moved. FIG. 11 (2) shows a case where it is connected to a 108 V rated electric device main body, electric tool main body 30 and the like. The terminal part 280 of the electric power tool main body 30 has a wide width in the left-right direction with respect to the terminal part 270, and a region between these is a terminal arrangement region. The terminal arrangement region has a positive input terminal 281 and a negative input terminal 282 arranged near both left and right ends, and a connection element 283 is formed at substantially the center in the left-right direction. The length of the connecting element 283 in the longitudinal direction is substantially the same as the positive input terminal 281 and the negative input terminal 282 (strictly, slightly shorter). Moreover, it is the same dimension in the height direction. This is because the addition of the connection element 283 for operating the voltage switching element eliminates the need to change the dimensional relationship between the positive electrode input terminal 281 and the negative electrode input terminal 282. Therefore, the voltage switching element is added. This is to prevent the battery pack 200 from becoming large. When the battery pack 200 is attached to the electric tool main body 30, the positive electrode input terminal 281 and the negative electrode input terminal 282 are inserted into the

terminal insertion ports

221 and 225, and the connection element 283 is inserted into the terminal insertion port 223.

FIG. 12 is a connection circuit diagram of the battery pack 200. In the battery pack 200, three cell units 156 to 158 (see FIG. 8B) are accommodated. The cell units 156 to 158 are formed as the cell pack 150 shown in FIG. 8, and are held by the

separator

152, and 10 cells 151 of 14500 size lithium ion batteries are connected in series. Note that in FIG. 12, 10 cells are collectively shown as one battery. In the terminal insertion ports (slots) 221 to 225 for inserting the input terminals on the

terminal portions

270 and 280, 1 to 4 connection terminals are arranged in the insertion direction of the

terminal portions

270 and 280, respectively. The connection terminal group disposed here serves as a voltage switching element that switches between parallel connection and series connection of the battery pack 200. A set of the terminal insertion port 222 and the terminal insertion port 224 corresponds to the terminal portion 270 for 36 V, and a switching terminal group (terminal group 232 and terminal group 234) for outputting a low voltage is arranged there. The The positive input terminal 271 is mounted so as to be in contact with the three terminals of the terminal group 232, and the negative input terminal 272 is mounted so as to be in contact with the three terminals of the terminal group 234.

A set of the terminal insertion port 221 and the terminal insertion port 225 corresponds to the terminal portion 280 for 108V, and a switching terminal (a terminal 231 and a terminal group 235) for outputting a high voltage is arranged there. The positive input terminal 281 is mounted so as to be in contact with the terminal 231, and the negative input terminal 282 is mounted so as to be in contact with the terminal 235. A connection element 283 for switching the output voltage is further provided at the left and right center of the terminal unit 280. A connection element 283 serving as a voltage switching element for switching between parallel connection and series connection is inserted into the terminal insertion port 223. The connecting element 283 has a conducting portion 283a on the front end side (the side close to the battery pack 200 in the figure) and a conducting portion 283c on the rear end side, and an insulator 283b is disposed between the conducting

portions

283a and 283c. As a result, the conducting portion 283a and the conducting portion 283c are electrically disconnected. The purpose of the

conduction parts

283a and 283c is to function as a short circuit for short-circuiting between predetermined terminals in the terminal group 233, and there is no need to wire from the

conduction parts

283a and 283c on the electrical equipment body side. Therefore, the connection element 283 is manufactured by casting a metal plate forming the

conductive portions

283a and 283c into a connection element base made of a non-conductor formed integrally with the terminal portion 280, or connected by a non-conductor. It is good to manufacture by sticking a metal plate on the outer peripheral surface of the element base or conducting the conductive treatment on the outer peripheral surface by metal plating or the like. In this way, the terminal portion 280 is formed by adding a short-circuit that connects a plurality of cell units in series with each other.

FIG. 13 is a diagram showing the shapes of the terminals 231 to 235, (1) is a top view, and (2) is a side view of the terminal group 232 (viewed from the direction B in (1)). Here, the

terminals

231 and 235 and the

terminals

232a, 233a, and 234a have the same shape as the terminals that have been widely used in the past, and the flat plate is bent into a U shape, with both side surfaces in the vicinity of the opening end facing inward. The narrowest portion formed by the convex portion is formed so as to be in contact with both surfaces of the plate-like terminal on the terminal portion side. The

terminals

231, 235, 232 a, 233 a, and 234 a have a shape in which the rear side is closed because the metal terminal on the terminal portion side to be fitted does not penetrate to the rear side. On the other hand, the other terminal groups, that is, the

terminals

232b, 232c, 233b to 233d, 234b, and 234c are fitted not only on the front side but also on the terminal portion side with the metal terminals being passed through from the front to the rear. An opening is also formed on the rear side. The specific shape is shown in the side view of (2). The terminal 232a is closed near the rear of the upper end (arrow 236a), but the

terminals

232b and 232c are not only the front side but also the rear side (arrow 236b). 236c and the vicinity) are open. For this reason, when the terminal portion 270 as shown in the figure is inserted in the direction of the arrow 265, the positive electrode input terminal 271 contacts the three terminals 232a to 232c at the same time, so that each becomes electrically conductive. This connection state is the same for the negative input terminal 272 and the three terminals 234a to 234c. Thus, in one terminal insertion slot, a plurality of terminals are arranged in the same direction (parallel direction) as the mounting direction, and the connection states of the cell units 156 to 158 in the battery pack 200 are connected in parallel using the electrode plate of the terminal portion. And can be set to either in series.

FIG. 14 is a diagram showing a state when the battery pack 200 is mounted on the

terminal portions

270 and 280, where (1) is a 36V output state and (2) is a 108V output state. The terminal unit 270 at 36V output shown in (1) has a positive input terminal 271 and a negative input terminal 272. The positive input terminal 271 is brought into conduction by contacting the

terminals

232a, 232b, and 232c. The terminal 232a is connected to the positive terminal (positive electrode) of the cell unit 156, the terminal 232b is connected to the positive terminal of the cell unit 157, and the terminal 232c is connected to the positive terminal of the cell unit 158. Therefore, the positive input terminal 271 is connected to the + terminals of the three cell units 156 to 158. Similarly, the negative input terminal 272 is brought into conduction by contacting the

terminals

234a, 234b, and 234c. The terminal 234a is connected to the negative terminal of the cell unit 156, the terminal 234b is connected to the negative terminal of the cell unit 157, and the terminal 234c is connected to the negative terminal of the cell unit 158. Therefore, the negative input terminal 272 is connected to the negative terminals of the three cell units 156 to 158. Since nothing is connected to the terminal group 233, the terminals 233a to 233d are opened. As a result, the cell units 156 to 158 are connected in parallel, that is, a DC voltage of 36 V is output to the positive input terminal 271 and the negative input terminal 272.

FIG. 14 (2) is a diagram showing a state when the battery pack 200 is attached to the terminal unit 280. The terminal unit 280 at the time of 108V output has a positive input terminal 281, a negative input terminal 282, and a connection element 283. The positive input terminal 281 contacts only with the terminal 231 connected to the + terminal of the cell unit 156. Similarly, the negative input terminal 282 contacts only the terminal 235 connected to the negative terminal of the cell unit 158. The connection element 283 (connection terminal) is inserted so as to be in contact with the four terminal groups (series terminal elements 233a to 233d). With this connection element 283, the

terminals

233a and 233b are short-circuited by the conducting portion 283a (see FIG. 12), and the

terminals

233c and 233d are short-circuited by the conducting portion 283c (see FIG. 12). Here, the terminal 233b and the terminal 233c are kept in a non-conductive state by an insulator 283b (see FIG. 12) formed in the connection element 283. Since the terminal 233a is connected to the negative terminal of the cell unit 156 and the terminal 233b is connected to the positive terminal of the cell unit 157, a serial connection state between the

cell units

156 and 157 is established. Similarly, since the terminal 233c is connected to the minus terminal of the cell unit 157 and the terminal 233d is connected to the plus terminal of the cell unit 158, a series connection state between the

cell units

157 and 158 is established. As a result of these conduction states, the cell units 156 to 158 are connected in series, and a rated direct current of 108 V is output to the positive terminal 231 and the negative terminal 235. Note that the terminals of the terminal group 232 and the terminal group 234 are opened.

As described above, in the second embodiment, a plurality of terminals (terminal groups) for switching the voltage are provided, and the switching terminal group is configured such that the terminals extending from each of the plurality of cell units are arranged adjacent to each other. The battery pack 200 that can support the power supply was realized. In particular, the slot 223 is connected to the positive or negative electrodes of a plurality of cell units, and is provided with a series terminal group (series terminal elements 233a to 233d) for connecting a plurality of cell units in series. And a battery pack 200 that can be switched to 108V. At this time, by setting the

terminal portion

270 or 280 on the power tool main body (electric device main body) side as shown in the figure, a slot (221 or 222) into which the positive electrode input terminal is inserted, and the negative electrode input terminal Since the third slot (223) into which the switching element (connecting element 283) for switching the output voltage is inserted is provided in addition to the slots (224 and 225) into which the battery is inserted, the battery can be obtained simply by mounting the battery pack 200. The output voltage from the pack 200 side is automatically switched. Therefore, the operator need not pay attention to the switching operation of the battery voltage, and there is no possibility of damaging the electric device main body due to a setting voltage error. Furthermore, since the three cell units 156 to 157 are opened (not connected) when the battery pack 200 is removed, it is possible to obtain an optimum state during storage or transportation. In the battery pack 200 of the second embodiment, a terminal group 232, a terminal group 234, and a connection element 283 that function as voltage switching elements, and a terminal 231, a terminal 235, a terminal group 232, and a terminal group 234 that function as power supply terminals are provided. Since the battery pack 200 is disposed at substantially the same height in the vertical direction, the size of the battery pack 200 in the vertical direction can be made compact.

The structure of the battery pack 200 using the second embodiment is not limited to the voltage switching type battery pack but can be effectively applied to a fixed voltage battery pack. FIG. 15 shows the structure of such a battery pack. FIG. 15 is a diagram for explaining a circuit diagram of a battery pack 200A dedicated to 108V. Here, the structure is the same as that shown in FIG. 14B with the

terminal groups

232 and 234 removed, and the

terminal insertion ports

222 and 224 formed at the insertion positions of the terminal groups 232 and 234 (both see FIG. 11) are closed. Is done. The electric device main body for 108 V uses a terminal portion 280 having a positive input terminal 281, a negative input terminal 282, and a connection element 283. The structure of the terminal portion 280 is the same as that shown in FIG. 12, and the connection element 283 has a leading end side conducting portion 283a and a trailing end side conducting portion 283c, and the conducting

portions

283a and 283c are insulated from each other. The body 283b is electrically connected in a nonconductive state. As described above, since the plurality of terminal groups are used to establish the serial connection state of the cell units 156 to 158 when the terminal unit 280 is connected, when the battery pack 200A is not attached to the electric device (removed) At the same time, the three cell units 156 to 158 are disconnected, so that the optimum state can be obtained during storage and transportation. Further, if the opening portions of the

slots

222 and 224 are closed, the 108V battery pack 200A can be configured not to be mounted on the 36V electric device main body, so that erroneous mounting can be effectively prevented.

FIG. 15B is a circuit diagram showing a battery pack 200B of another modification. The positive electrode input terminal 281A and the negative electrode input terminal 282A have the same terminal shape and fitting objects (terminals 231 and 235) as the structure of (1) except that the space in the left-right direction is widened. However, (2) is obtained by dividing the connection element 283 of (1) into two in the left-right direction and dividing it into a first connection terminal 285 and a second connection terminal 286. Along with this division, the terminals 233a to 233d are arranged in the horizontal direction. The first connection terminal 285 is a metal plate for short-circuiting the terminal 233 b connected to the + terminal side of the cell unit 157 and the terminal 233 a connected to the − terminal side of the cell unit 156. Similarly, the second connection terminal 286 is a metal plate for short-circuiting the terminal 233c connected to the negative terminal side of the cell unit 157 and the terminal 233d connected to the positive terminal side of the cell unit 158. This modification can provide the same effect as (1) and is advantageous in mounting on an existing battery pack because the installation space for the

terminals

233a and 233b, 223c and 233d is small. In the modification of FIG. 15 (2), if six rows of terminal insertion openings are provided in the horizontal direction, the

terminal groups

232 and 234 for 36V output (see FIG. 13) are arranged in the configuration of (2). Thus, a battery pack in which the length of the terminals in the front-rear direction is reduced can be realized.

Various modifications can be made to the above-described embodiment. In the above-described embodiment, the voltage is switched between 18V and 36V, but other voltage ratios may be used. Further, the method of joining the upper kale and the lower case is not limited to the swinging structure and is fixed using a latch, but may be another known fixing method. It is not limited to the configuration in which the cell pack is inverted in the vertical direction with respect to the lower case, but may be configured in the horizontal direction (front-rear direction).

DESCRIPTION OF

SYMBOLS

1, 1A, 30A, 30B, 30C ... Electric tool main body, 2, 32 ... Housing, 3, 33 ... Handle part, 4, 34 ... Operation switch (trigger), 10 ... Battery pack mounting part, 11a ... Rail groove, 12 DESCRIPTION OF SYMBOLS ... Curve part, 15 ... Battery pack, 18a ... Rail, 20, 20A ... Terminal part, 20a ... Vertical surface, 20b ... Horizontal surface, 21 ... Positive electrode input terminal, 22 ... Negative electrode input terminal, 23 ... LD terminal, 24 ... Projection part , 24A ... switching projection, 26 ... screw, 35 ... motor, 35a ... rotor, 35b ... stator, 38 ... tip tool holding part, 38a ... pin hole, 40 ... battery pack mounting part, 40a ... mounting surface, 40b ... depression part, 41 ... terminal part, 48a, 48b ... rail groove, 49, 49A ... AC socket, 49a ... first equipment side terminal, 49b ... second equipment side terminal, 49c ... third equipment side terminal, 5 DESCRIPTION OF SYMBOLS ... Calculation part 52 ... Control signal output circuit 53 ... Rotation position detection circuit 54 ... Rotation speed detection circuit 55 ... Current detection circuit 56 ... Operation switch 57 ... Switch operation detection circuit 58 ... Applied voltage setting circuit 59 ... Voltage detection circuit, 60 ... Diode bridge, 61 ... Capacitor, 62 ... Shunt resistor, 66a ... Control signal line, 66 ... Switching element, 67 ... Battery voltage detection circuit, 68 ... Commercial power supply detection circuit, 70 ... Inverter circuit, 75 ... Connection adapter, 76a, 76b ... Power line, 77a ... Adapter side positive terminal, 77b ... Adapter side negative terminal, 78 ... Latch button, 79 ... AC socket, 79a ... First adapter side terminal, 79b ... Second adapter side terminal 79c ... third adapter side terminal, 80 ... terminal portion, 81 ... positive input terminal, 82 ... negative input terminal, 84 ... switching Projection, 90 ... Power cord, 91 ... Plug, 92a ... Terminal, 93 ... Connector, 93a ... Connector body, 93b ... Fixing screw, 94 ... Connection cord, 95a ... First cord side terminal, 95b ... Third cord Side terminal, 95c ... third cord side terminal, 100 ... battery pack, 101 ... lower case, 110 ... upper case, 111 ... lower step surface, 112 ... stepped portion, 115 ... upper step surface, 120 ... slot group arrangement region, 121 ... Positive terminal insertion port, 122 ... Negative terminal insertion port, 123 ... Low voltage switching member insertion port, 124 ... High voltage switching member insertion port, 131 ... Stopper portion, 132 ... Raised portion, 134 ... Slit (cooling air inlet), 138a, 138b ... rail, 141 ... latch, 142 ... spring, 150 ... cell pack, 151, 151A ... cell, 152, 152A ... separator, 156 ~ 158 ... Cell unit, 159 ... Thin plate, 160 ... Substrate, 161 ... Positive electrode terminal, 162 ... Negative electrode terminal, 170 ... Voltage switching mechanism, 171 ... Rotary terminal base, 172 ... Swing shaft, 173a to 173d ... Connection terminal , 176a to 176j ... contacts, 200, 200A, 200B ... battery pack, 201 ... lower case, 210 ... upper case, 211 ... lower step surface, 212 ... step portion, 215 ... upper step surface, 221 to 225 ... terminal insertion port, 231 235 ... terminal, 232, 233, 234 ... terminal group, 232a to 232c, 233a to 233d, 234a to 234c ... terminal, 238a, 238b ... rail portion, 240 ... raised portion, 241 ... latch portion, 241a ... latch claw, 270, 280, 280A ... terminal portion, 271,281 ... positive input terminal, 272,282 ... negative input terminal, 83 ... connecting element, 283a ... conduction portion, 283b ... insulator, 283c ... conductive portion

Claims

A load device;
A housing that houses the load device;
A battery pack mounting portion provided on the housing so that the battery pack can be mounted, and having a positive input terminal connectable to a positive terminal of the battery pack and a negative input terminal connectable to a negative terminal of the battery pack; A rectifier circuit that converts the supplied AC voltage into a DC voltage and outputs the DC voltage,
An electric device main body configured to be connectable to the housing with an AC power supply that supplies an AC voltage to the rectifier circuit,
The electric device main body characterized in that, in the battery pack mounting portion, the AC power supply device can be connected to a portion that is not exposed to the outside when the battery pack is mounted on the battery pack mounting portion.
Inside the housing, the rectifier circuit is provided in a circuit connected from the positive input terminal and the negative input terminal to the load device,
When the AC power supply device is connected to the battery pack mounting portion, the AC voltage input from the positive electrode input terminal and the negative electrode input terminal is input to the rectifier circuit inside the housing and converted to a DC voltage. The electric device main body according to claim 1, wherein the electric device main body is configured to be converted as follows.
A case that can be attached to the battery pack attachment part of the electrical device body,
A power cord having one end connected to the case and a plug portion connectable to a commercial AC power source at the other end;
An output terminal provided in the case and connected to the power cord, wherein the first adapter side terminal and the second adapter side terminal for outputting an AC voltage to the electric device main body side are provided. Connection adapter.
The electric device main body according to claim 2,
A case that can be attached to the battery pack attachment portion, a power cord having one end connected to the case and a plug portion that can be connected to a commercial AC power source at the other end, and an output provided in the case and connected to the power cord A connection adapter comprising a first adapter side terminal and a second adapter side terminal that are terminals and output an alternating voltage to the electric device main body side,
When the connection adapter is mounted on the battery pack mounting portion, the first adapter side terminal is connected to the positive input terminal, the second adapter side terminal is connected to the negative input terminal, and input from the power cord An electric device characterized in that the AC voltage is input to the rectifier circuit.
The battery pack mounting portion of the electric device main body is provided with a device-side rail that guides the connection adapter, and the case of the connection adapter is provided with an adapter-side rail that engages with the device-side rail. The electric device according to claim 4.
In addition to the positive input terminal and the negative input terminal, the battery pack mounting portion is provided with an AC socket having a first device side terminal and a second device side terminal for inputting commercial AC power from outside,
In the inside of the housing, a rectifier circuit capable of converting an alternating voltage into a direct voltage is provided in a circuit connected from the first device side terminal and the second device side terminal to the load device,
When the AC power supply device is connected to the battery pack mounting portion, the AC voltage input from the first device side terminal and the second device side terminal is input to the rectifier circuit inside the housing. The electric device main body according to claim 1, wherein the electric device main body is configured to be converted into a DC voltage.
The battery pack mounting part is provided with a device-side rail for guiding the battery pack extending in the front-rear direction. The electric device main body according to claim 6, wherein:
An electric device comprising the electric device main body according to claim 6 and a power cord connected to the electric device main body, wherein the power cord is attachable to an AC socket of the electric device main body. A connector portion, a connection cord having one end connected to the connector portion, and a plug portion connected to the other end of the connection cord and connectable to a commercial AC power source;
The connector portion includes a first cord side terminal and a second cord side terminal that output an AC voltage input from the power cord to the electric equipment body side,
In the electrical device main body, when the power cord is attached to the AC socket, the first cord side terminal of the power cord is connected to the first device side terminal of the AC socket, and the first cord side terminal of the power cord is 2 cord side terminal is connected to said 2nd apparatus side terminal of AC socket,
An electric device configured such that an AC voltage input from the first device side terminal and the second device side terminal is input to the rectifier circuit and converted into a DC voltage.