JP6729711B2 - Battery pack and electrical equipment using battery pack - Google Patents

Description

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 mounting the battery pack, or an electric device main body with the battery pack removed. Further, the main body of the electric device driven by the battery pack can be driven by the AC power supply.

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

Cordless power tools and electric devices are required to secure a predetermined operating time and a predetermined output, and higher output and higher power have been achieved as the performance of secondary batteries has improved. Further, as electric devices using a battery pack as a power source have been developed, battery packs with various voltages have been prepared. Normally, the output voltage of a battery pack is fixed, but in Patent Document 1, a plurality of battery units are provided in a housing that houses a battery, and whether to output them in series connection or in parallel connection is determined by a connecting means. There has been proposed a power supply device for an electric device that can be adapted to devices of different voltages by making it selectable.

JP, 2014-17954, A

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

The present invention has been made in view of the above background, and an object of the present invention is to provide an electric device body that can be operated by either a battery pack or an AC 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 electric device using the battery pack.

The typical ones of the inventions disclosed in the present application will be described as follows. A first aspect of the present invention is an electric device main body including a load device, a housing that accommodates the load device, and a battery pack mounting portion that is provided in the housing so that the battery pack can be mounted. The housing is an electric equipment main body configured to connect an AC power supply device for supplying an AC voltage to the electric equipment main body. According to the first aspect of the invention, by providing the above features, it is possible to solve the problem of providing an electric device body that can be operated by either a battery pack or an AC power supply device.

A second invention is a battery pack including a cell unit having a plurality of cells and a housing for housing the cell unit, wherein the voltage output by the cell unit is 100 V or more. It's a pack. According to the second aspect of the invention, by providing the above features, it is possible to solve the problem of providing a battery pack that can be used for high-load work and an electric device using the battery pack.

At least one of the above problems can be solved not only by the invention having the above-mentioned features but also by the invention having the following features, for example. Further, these inventions can be combined with the configurations provided in the embodiments described in the section of the embodiments for carrying out the invention.

A third invention is a load device, a housing for housing the load device, a battery pack mounting portion provided in the housing so that the battery pack can be mounted, and a positive electrode input terminal connectable to a positive electrode terminal of the battery pack. A battery pack mounting portion having a negative electrode input terminal connectable to a negative electrode terminal of the battery pack, and a rectifier circuit that converts the supplied AC voltage into a DC voltage and outputs the DC voltage, the AC voltage being used as a rectifier circuit. An electric device body configured to connect an AC power supply device to be supplied to the housing, wherein the AC power supply device is not exposed to the outside when the battery pack of the battery pack mounting part is mounted on the battery pack mounting part. It is an electric device main body characterized in that it is connectable. According to the third aspect of the invention, by providing the above features, it is possible to solve the problem of providing an electric device body that can be operated by either a battery pack or an AC power supply device. According to the third invention, since the AC power supply device can be connected to the battery pack mounting portion, the electric device body can be made compact as compared with the case where the AC power supply device is connected to a place other than the battery pack mounting portion. The effect that it can be configured is exhibited.

A fourth aspect of the present invention is to provide a rectifier circuit 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 portion, and the AC power supply device to the positive electrode input terminal and the negative electrode input terminal of the battery pack mounting portion. Is connected, 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 into a DC voltage. According to the fourth aspect of the invention, by providing the above features, it is possible to solve the problem of providing an electric device body that can be operated by either a battery pack or an AC power supply device. According to the fourth invention, when the AC power supply device is connected, the positive electrode input terminal and the negative electrode input terminal are not exposed to the outside, and it is possible to prevent the positive electrode input terminal and the negative electrode input terminal from being damaged or soiled. In addition, it is possible to reduce the number of terminals required for connecting the AC power supply device.

According to the fifth invention, a case that can be mounted in the battery pack mounting part of the electric device body, a power cord having one end connected to the case and a plug part that can be connected to a commercial AC power source at the other end, and provided in the case A connection adapter having an output terminal connected to the power cord and having a first adapter side terminal and a second adapter side terminal for outputting an AC voltage to the electric device body side is configured. In addition, a case that can be attached to the battery pack mounting 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 case provided on the case and connected to the power cord. Which is an output terminal for outputting an AC voltage to the main body of the electric device, and a connection adapter having a first adapter side terminal and a second adapter side terminal, wherein the connection adapter is a battery pack mounting portion. When mounted, 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 to. A device-side rail that guides the connection adapter is provided in the battery pack mounting portion of the electric device body, and an adapter-side rail that engages with the device-side rail is provided in the case of the connection adapter.

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

According to a seventh aspect of the present invention, there is provided an electric device having a power cord connected to the electric device main body, wherein the power cord has a connector part attachable to an AC socket of the electric device main body and one end connected to the connector part. It has a plug part that can be connected to a commercial AC power supply at the other end. The terminals provided in the connector portion include a first cord side terminal and a second cord side terminal that output an AC voltage input from a power cord to the electric device body side. 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 second cord-side terminal of the power cord is the second cord of the AC socket. The 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 present invention, a housing for housing a plurality of cell units in which a plurality of cells are connected in series is used, a 14500-standard lithium ion secondary battery is used as the cells, and n cells connected in series are treated as a unit. It is a battery pack in which m units are collectively housed in each housing, and m units are connected in parallel to output a low voltage, or m units are connected in series to generate a high voltage. It is possible to switch whether to output. 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, 36 V at low voltage and 108 V at high voltage can be obtained. .. At this time, the power weight ratio of the battery pack was set to 2173 W/Kg or more and 144 V/Kg or more. Further, in the eighth invention, the cells are not limited to the 14500 standard cells, but cells of other standards may be used. Furthermore, the number of m (however, m≧2) and n is arbitrary, and for example, a battery pack in which the voltage is switched between 18V and 36V may be set as m=2 and n=5, or m=2 and n=10. It may be a battery pack in which the voltage is switched between 36V and 72V, a battery pack in which the voltage is switched between 54V and 108V with m=2 and n=15, or a combination of other voltages.

According to the ninth aspect, 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 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 body is connected, the first switching element comes into contact with the voltage switching means to move the connector to the first position, and when the electric device body having the second switching element is connected. Causes the second switching element to contact the voltage switching means to move the connector to the second position. In addition, a positive electrode terminal and a negative electrode terminal are formed in a terminal mounting portion of the electric device main body so as to be apart from each other in a direction intersecting the connecting direction, and the first switching element or the negative electrode terminal is disposed between the positive electrode terminal and the negative electrode terminal in the intersecting direction. The second switching element is arranged. In this intersecting direction, the positions where the first switching element and the second switching element are arranged are different.

According to the tenth invention, the voltage switching means is connected by a seesaw-type swinging member, a plurality of connectors radially arranged from the swinging shaft of the swinging member toward opposite sides, and the connectors. Alternatively, it has a contact (electrode) that is interrupted. 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 present invention, the weight of the battery pack is 800 g or less and the output of 100 V or more is possible. By using such a battery pack, the weight of the electric device main body side was set to 1200 g or less, and it was possible to realize an electric device and an electric tool which were 2000 g or less in total and were portable. In addition, since the drive voltage of the brushless motor in an electric device having a motor, that is, an electric power tool is equal to or higher than 100 V, which is equal to a commercial voltage, the electric power tool body is provided with both a DC input terminal and an AC input terminal to which an AC power source can be connected. Thus, the brushless motor can be driven by selectively supplying electric power from one of the battery pack and the AC power source. The AC power is supplied to the AC input terminal through a power cord having a detachable connector section. The socket portion connected to the connector portion may be provided at a portion of the power tool body where the battery pack is attached and which is not exposed when the battery pack is attached. Further, the socket portion connected to the power cord may be provided at a position in the housing of the power tool body that can be connected even when the battery pack is mounted.

According to the twelfth invention, in a power tool capable of being driven by either a battery pack or an AC power source, a switching element is provided in a circuit from the DC input terminal to the brushless motor, and the battery pack serves as the DC input terminal. When the AC power source is connected and the AC power source is connected to the AC input terminal, the control unit shuts off the switching element so that the brushless motor is supplied with power from the AC power source. Further, the power tool is provided with an inverter circuit that has a plurality of semiconductor switching elements and generates a drive current for driving a brushless motor, and a diode bridge circuit that rectifies an AC power supply and supplies a DC current to the inverter circuit, The outputs of the DC input terminal and the AC input terminal are configured to be supplied to the inverter circuit via the diode bridge circuit. Furthermore, the AC input terminals are 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 the AC input terminals to connect the battery pack with a dummy case connection terminal group. Power may be supplied to the diode bridge circuit via the.

According to the thirteenth aspect of the invention, the motor, the housing for housing the motor, which has a handle portion extending substantially vertically, and the operation of the motor, which is provided in the front portion of the handle portion at the upper portion of the handle portion, are controlled. An operation switch that is operated to operate, and a positive electrode input terminal and a negative electrode input that are provided below the handle part and that can be connected to the positive electrode terminal and the negative electrode terminal on the battery pack side when the battery pack is installed in the battery pack installation part. An electric device main body including a battery pack mounting portion having a terminal, wherein a first terminal and a second terminal for inputting commercial AC power from outside using a power cord are provided in a housing below a handle portion. A rectifier circuit capable of converting an AC voltage into a DC voltage is provided in a circuit connecting the first terminal and the second terminal to the motor. In addition, a connector part that can be attached to an AC socket of an electric device body, a power cord having one end connected to the connector part and a plug part that can be connected to a commercial AC power source at the other end, and a terminal provided on the connector part. It is configured to have a first terminal and a second terminal for outputting the AC voltage input from the power cord to the electric device body side.

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 supply 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 with each other to output a low voltage, or a pack in which a plurality of cell units are connected in series with each other and outputs a high voltage. The voltage state can be switched. Further, the high-voltage electric device main body can be connected to only one variable battery pack, and is configured to switch the variable battery pack to a high voltage state when the variable battery pack is connected. The power input from the commercial power supply is configured to be output to the high-voltage electric device main body when connected to the high-voltage electric device main body.

According to the present invention, it is possible to provide an electric device body that can be operated by either a battery pack or an AC power supply device. Further, according to the present invention, it is possible to provide a battery pack that can be used for high-load work and an electric device using the battery pack.

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 30 A of electric tool main bodies, (1) is a side view in the state which is supplied with power from the power supply 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 cord 90 and the connector part 93. 3 is a block diagram showing 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, (1) is an example of a connection in 30 A of electric power tool main bodies, (2) and (3) are the electric motors which concern on the modification. It is a figure which shows the example of connection to the tool main bodies 30B and 30C. (1) is a circuit block diagram of a drive control system of the power tool body 30B, and (2) is a circuit block diagram of a drive control system of the power tool body 30C. It is a perspective view showing the appearance shape of battery pack 100 of the 1st example. It is a figure which shows the cell pack 150 accommodated in the inside of the battery pack 100, (1) is a perspective view, (2) is a side view of the cell pack 150 seen from the axial direction of the cell 151. (1) is a diagram showing a state near the terminal portion 20A when the battery pack 100 is attached to a power tool body having a rating of 36V, and (2) is a connection circuit diagram thereof. (1) is a diagram showing a state around the terminal portion 80 when the battery pack 100 is attached to a power tool body having a rating of 108 V, and (2) is a connection circuit diagram thereof. It is a perspective view which shows the shape of the battery pack 200 which concerns on a 2nd Example, and the terminal part connected to it, (1) shows the state at the time of being connected to an electric device of a rating 36V, (2) is a rating. The state when connected to 108V electric equipment is shown. FIG. 12 is a connection circuit diagram of the battery pack 200 of FIG. 11. It is a figure which shows the shape of the terminals 231 to 235 of FIG. 12, (1) is a top view, (2) is a side view of the terminal group 232 (the arrow view from the B direction of (1)). It is a figure which shows the state when the battery pack 200 is attached to 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 the battery pack 200A, 200B for 108V only 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 modified example is used.

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

FIG. 1 is a diagram for explaining how the battery pack according to the present embodiment is attached to an electric tool. BACKGROUND ART An electric tool, which is a form of electric equipment, has a battery pack and is a tool for fastening bolts, nuts, screws, and the like with a tip tool such as a bit, and is a so-called impact tool. At the tip of the electric tool main body 1, there is an output shaft having a mounting hole whose cross-sectional shape perpendicular to the axial direction is hexagonal, and one-touch using a sleeve movably held in the front-rear direction on the outer peripheral side of the output shaft. 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 tool main body 30 is a tool for tightening bolts, nuts, etc. (not shown) by applying rotational force or axial striking force to a tip tool such as a socket wrench (not shown). These electric tool main bodies 1 and 30 are provided with housings 2 and 32 that are outer frames that form the outer shape, and handle portions 3 and 33 are formed in the housings 2 and 32. The operator holds the electric tool main bodies 1 and 30 while holding the electric tool main body 1 or 30 with one hand or holding the electric power tool with one hand and performing the operation. The electric tool main bodies 1 and 30 use a direct current supplied from the battery pack 15 or 100 as a power source to drive a motor (not shown) housed inside the housings 2 and 32. Trigger-shaped operation switches 4 and 34 are provided near a part of the handle parts 3 and 33 which is touched by an index finger when gripped by an operator, and a battery pack 15 is provided below the handle parts 3 and 33. Battery pack mounting portions 10 and 40 for mounting 100 are formed.

The electric tool main body 1 is an electric device that uses a conventional battery pack 15 having a rated voltage of 36V, and drives a motor as a load device. Therefore, the battery pack 15 can be mounted in the battery pack mounting portion 10 of the electric device (power tool body 1) corresponding to 36V as in the combination indicated by the arrow a. On the other hand, the electric tool main body 30 requires a high voltage as high as the commercial voltage of the rated voltage 108V, and the battery pack 100 capable of outputting 108V is mounted in the battery pack mounting portion 40 as shown by an arrow b1. Inside the battery pack 100 capable of outputting a high voltage, 30 cells of a lithium ion battery having a rating of 3.6V are housed. As described above, it is usual to mount the dedicated battery packs 15 and 100 corresponding to the rated voltage on the electric tool main bodies 1 and 30, but in the present 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 shown by the arrow b2. In order to mount the battery pack 100 on the electric tool main bodies 1 and 30 having different voltages as indicated by arrows b1 and b2, the battery pack mounting portions 10 and 40 should have substantially the same shape. It is important to be able to switch 100 voltages. Further, when the set voltage of the battery pack 100 does not correspond to the voltage of the electric device or electric tool to be attached, the battery pack 100 should not be attached, or configured so that it does not operate even if attached. is important. In addition, in the example of FIG. 1, the electric tool main bodies 1 and 30 are shown as an example of the electric device main body, but as the load device that operates by the electric power of the battery pack, electric energy is kinetic energy, thermal energy, magnetic energy, or Any electrical device that converts to light energy is possible.

FIG. 2 is a perspective view showing the shape of the battery pack mounting portion 10 of the power tool body 1. The electric tool main body 1 shown here is an impact driver, is provided with a handle portion extending downward from the body portion of the housing 2, and the battery pack mounting portion 10 is formed below the handle portion. The handle portion is provided with a trigger switch 4. 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 a tip tool 9 is provided at the tip of the anvil. Here, a plus driver bit is attached as the tip tool 9. Not only the electric tool but also the electric equipment using the battery pack in general, the battery pack mounting portion 10 corresponding to the shape of the battery pack to be mounted is formed, and the battery pack which does not conform to 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 parallel to the front-rear direction are formed on the inner wall portions on the left and right sides, and the terminal portion 20 is provided between them. The terminal portion 20 is manufactured by integrally molding a non-conductive material such as synthetic resin, and a plurality of metal terminals, for example, a positive electrode input terminal 21, a negative electrode input terminal 22, and an LD terminal (abnormal signal terminal) 23 are cast therein. Be done. The terminal portion 20 is formed with a vertical surface 20a serving as an abutting surface in the mounting direction (front-back 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. , The opposite surfaces. On the front side of the horizontal surface 20b, a curved portion 12 that contacts a raised portion 132 (described later in FIG. 7) of the battery pack 100 is formed, and a protrusion portion 24 is formed near the center of the curved portion 12 in the left and right direction. The protrusion 24 also serves as a boss for screwing the housing of the electric tool main body 1 which is divided into two parts in the left-right direction, and also serves as a stopper that limits relative movement of the battery pack 100 in the mounting direction. The width S1 of the protrusion 24 in the left-right direction is a width corresponding to the stopper 131 (described later in FIG. 7) formed on the battery pack 100 side.

FIG. 3 is a view showing another electric tool main body 30A compatible with 108V, (1) is a side view in a state where power is supplied from the power cord 90, and (2) is a bottom view of the battery pack mounting portion 40. And (3) is a view showing the shapes of the power cord 90 and the connector portion 93. The electric tool main body 30A is a brushless motor whose specifications are equivalent to 100V AC, for example, a brushless DC motor driven by an inverter circuit (described later in FIG. 4). Therefore, 108 V DC output from the battery pack 100 is input to the inverter circuit, or a commercial power supply (AC power supply device) such as AC 100 V (60 Hz) is rectified by the rectifier circuit described below and then the inverter circuit is rectified. To enter. In this way, by increasing the output voltage of the battery pack 100 to the same level as the commercial voltage, it is possible to realize the AC/DC combined high output electric tool main body 30A that operates at both the battery pack and the commercial voltage. The power cord 90 attached to the electric tool main body 30A has two terminals 92a and 92b on one side of a connection cord 94, has a plug portion 91 for attaching to an outlet of a commercial power source, and has the other side on the other side. A connector portion 93 connected to the electric tool body 30A is formed. In the present embodiment, the location where the connector portion 93 is connected is arranged 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 body 30A, it is necessary to remove the battery pack 100 from the power tool body 30A, and conversely, when mounting the battery pack 100 on the power tool body 30A. Need to be removed.

FIG. 3(2) is a view of the battery pack mounting portion 40 of the power tool body 30A as seen from below, and is a view from the direction A in (1). 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 by sliding the battery pack 100 from the rear side to the front side (right to left in the drawing). Therefore, an opening portion 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 lateral side. Further, a recessed portion 40b is formed on the upstream side (rear side portion) of the opening portion so as to be recessed upward. A terminal portion 41 connected to the positive electrode terminal or the negative electrode terminal of the battery pack 100 is provided near the center of the portion of the mounting surface 40a sandwiched between the rail grooves 48a and 48b. In this embodiment, the AC socket 49 is provided at a portion slightly rearward of the terminal portion 41. In the AC socket 49, a pin-shaped first device-side terminal 49a, a second device-side terminal 49b, and a third device-side terminal 49c are formed in the circumferential direction.

FIG. 3(3) is a view showing the shape of the connector portion 93 of the power cord 90, in which the left side is a view of the connector portion 93 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 axial movement 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 peripheral portion. It Here, only two of the first cord side terminal 95a and the second cord side terminal 95b need be connected for commercial power supply, and the third device side terminal 49c connected to the third cord side terminal 95c is 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 that the power cord 90 does not fall off from the power tool body 30A, and the female screw portion on the inner peripheral side of the fixing screw 93b is connected to the male screw portion 49d formed on the outer peripheral surface of the AC socket 49. Screw together. As described above, after the connector main body 93a is inserted into the AC socket 49, the fixing screw 93b is tightened and screwed into the male screw on the AC socket 49 side, so that the power cord 90 can be fixed so as not to fall off from the electric tool main body 30A. .. Although the electric tool main body 30A has been described as an example of the electric device main body in FIG. 3, the battery may be any electric device main body having the battery pack mounting portion 40 and capable of mounting the battery packs 1 and 30. It is possible to adopt a configuration in which the power cord 90 is connected to a portion that is not exposed to the outside when the pack is mounted in the battery pack mounting portion 40. Further, 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 body 30A does not have to be a screw type, but the fitting pressure of the terminal portion is not required. It may be a power cord that can be held by the above method, or 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 this embodiment, the DC supplied from the battery pack 100 is used to generate an exciting current by using the inverter circuit 70, and the exciting current is passed through a predetermined coil of the motor 35 while switching the exciting current. To 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 may be, for example, an inner rotor type, and includes a rotor (rotor) 35 a including a plurality of sets (two sets in this embodiment) of permanent magnets (N) and S poles. , A stator 35b composed of three-phase stator windings U, V, and W connected in a star connection, and arranged at predetermined intervals in the circumferential direction to detect the rotational position of the rotor 35a, for example, every 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 arithmetic unit 51. The calculation unit 51 uses these outputs to determine the energizing direction and time of the stator windings U, V, W.

The control signal output circuit 52 forms a drive signal for switching the predetermined switching elements Q1 to Q6 based on the output signals of the applied voltage setting circuit 58 and the rotational position detection circuit 53 according to an instruction from the arithmetic unit 51, and drives the drive signal. The signal is output to the inverter circuit 70. The inverter circuit 70 includes six switching elements Q1 to Q6 such as IGBTs connected in a three-phase bridge form. 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, W which are star-connected. As a result, the six switching elements Q1 to Q6 perform a switching operation by the switching element drive signals (drive signals such as H1 to H6) input from the control signal output circuit 52, and the battery pack applied to the inverter circuit 70. A DC voltage of 100 is applied to the stator windings U, V, W as three-phase (U-phase, V-phase and W-phase) voltages Vu, Vv, Vw.

The calculation unit 51 sets the presence or absence of the operation of the trigger 34A (or the operation switches 4 and 34 of FIG. 1) for operating the operation switch 56 by the switch operation detection circuit 57, and changes depending on the size of the operation amount (stroke). The pulse width (duty ratio) of the PWM signal is changed based on the signal from the applied voltage setting circuit 58, and each gate of the six switching elements Q1 to Q6 is driven via the control signal output circuit 52. By this drive control, the amount of electric power supplied to the motor 35 is adjusted, and the start/stop and rotation speed of the motor 35 are controlled. Here, the PWM signal is supplied to 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, and the switching elements Q1 to Q3 or the switching elements Q4 to Q6 are switched at high speed. As a result, the amount of electric power supplied to each stator winding U, V, W from the DC voltage of the battery pack 100 is controlled.

The arithmetic unit 51 is configured to include a microcomputer (not shown) for outputting a drive signal based on a processing program and data. The arithmetic 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 arithmetic unit 51.

The power source of the electric tool main body 30A can be supplied not only by the battery pack 100 but also by using the power cord 90, and the first device side terminal 49a of the AC socket 49 for AC input provided in the electric tool main body 30A and the first device side terminal 49a. The two-device side terminal 49b is connected to the input side of the diode bridge 60. The diode bridge 60 is a rectifying circuit that performs a full-wave rectification using four rectifying diodes to allow a current to flow in only 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 state of the power cord 90 to the power tool body, (1) is an example of connection in the power tool body 30A, and (2) and (3) are modifications 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 bodies 30B and 30C are different from each other only in the connection position and the connection method of the power cord 90, and other configurations that are not related to the connection of the power cord 90 are the same as the configurations of the power tool body 30A shown in FIG. Therefore, the voltage switchable battery pack 100 shown in FIG. 1 can be mounted on any of the power tool bodies 30A to 30C. Although not shown here, it is also possible to attach a fixed voltage type 108V battery pack or the battery packs 200 and 300 described in Examples 2 and 3 described below to the power tool bodies 30A to 30C. Needless to say, since the battery packs 200 and 300 can be mounted, it is necessary to form the shape of the battery pack mounting portion 40 so as to correspond to the battery pack to be mounted.

In the embodiment of this embodiment shown in FIG. 5(1), 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. .. Also, 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 attached, the power supply from the battery pack 100 and the power supply from the power cord 90 can be reliably distinguished without mistake. You can select either one. Further, since a 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 by the battery pack 100, which is commonly used for AC/DC. I was able to realize an electric tool.

The power cord 90 may be long enough to allow the operator to work with the handle portion 33 of the power tool body 30A held in one hand, but in a place where the length of the power cord 90 does not reach. In the temporary work, if the power cord 90 is removed and the battery pack 100 is attached, the work can be performed equally without worrying about the output reduction of the electric tool main body 30A. In addition, in the method of connecting the power cord 90 to the power tool body 30A in the form shown in FIG. 5A, the weight of the power tool body 30A is lightened because the battery pack 100 is always removed when working with an AC power source. There is an advantage that. Furthermore, when switching from the power cord 90 to the operation using the battery pack 100, the battery pack 100 cannot be mounted 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 possibility that the AC socket 49 is exposed to dust, water, etc. can be significantly reduced, and a cover for covering the AC socket 49 can be installed. It can be omitted.

FIG. 5B shows a power tool body 30B according to a modification of the power tool body 30A of FIG. 1A, in which the position of the AC socket 49A is the lower surface of the housing of the power tool body 30B. And is formed on the front side of the battery pack 100. A bottom view of the AC socket 49A is shown in the 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 commercial power supply are connected. In addition to the terminal 49b, a third device side terminal 49c is provided. It is optional whether the third device side terminal 49c is wired or not in the electric tool main body 30B. With this arrangement, the power cord 90 can be connected with the battery pack 100 still attached. In order to prevent the AC socket 49A from being exposed to the outside when the power cord 90 is removed, some kind of cap or cover that closes the opening of the AC socket 49A may be provided. In this embodiment, the output voltage of the battery pack 100 is 108 V when the DC connection is made, and the commercial AC power is 100 V to 120 V AC. Therefore, both inputs can be arbitrarily used to drive the power tool body 30B. it can. However, when both power sources can be used, it is preferable to use the commercial AC power supplied from the power cord 90 because the battery pack 100 can be prevented from discharging. Therefore, the electric tool main body 30B shown in FIG. 5(2) is provided with the input automatic switching means for using the commercial AC power side when both the battery pack 100 and the commercial AC power are available. In FIGS. 5A and 5B, 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 tool main body 30B shown in FIG. 5(2). Although it is 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 side 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 arithmetic unit 51, and the arithmetic 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 voltage) of the AC voltage are provided, and the respective outputs are input to the calculation unit 51. When the commercial power supply 99 is available, the arithmetic unit 51 turns off the gate signal of the switching element 66 to cut off the input circuit from the battery pack 100. On the other hand, when the commercial power supply 99 becomes unusable, the arithmetic unit 51 turns on the gate signal of the switching element 66 to bring the input circuit from the battery pack 100 into the connected state.

With such a circuit configuration, in the electric tool main body 30B, when the battery pack 100 is connected, a direct current of 108 V (rated) is supplied, and when the power cord 90 is connected to the AC outlet in that state, the AC power is automatically supplied. When the power is supplied and the power cord 90 is removed, the drive automatically switches to the battery pack 100, so that the power tool body 30B with good usability can be realized. Further, 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, especially forgetting to remove the other one when the one is connected, it is easy to handle the attachment/detachment of the battery pack 100. Note that, in the example of FIG. 6, the switching unit 66 is used as the input voltage automatic switching means, and the arithmetic unit 51 controls the input voltage. However, other methods may be used. For example, if there is an output of the diode bridge 60, the output of the diode bridge 60 is connected to the inverter circuit 70 by using a relay means that operates according to the output voltage of the diode bridge 60, and the battery pack 100 and the inverter circuit 70 are connected. To disconnect from. On the other hand, when the plug portion 91 (see FIG. 5) of the power cord 90 is unplugged from the outlet, the output voltage from the inverter circuit 70 becomes zero. Therefore, the switching operation of the relay means causes the diode bridge 60 and the inverter circuit 70 to be switched. The connection may be cut off so that the output of the battery pack 100 is connected to the inverter circuit 70. The power tool 30B in use may be configured to display an identification means indicating which power is being used, for example, an LED during driving by commercial AC power.

Return to FIG. 5 again. FIG. 5(3) shows an electric tool main body 30C according to another modification of the present embodiment. The power tool body 30C is the same as (1) and (2) in the figure in that it can be driven by the 108V DC battery pack 100 and by the AC power source via the power cord 90. The connection is made via the connection adapter 75. 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, especially the shape of the upper half (upper case) is configured to be compatible with the battery pack 100, but no battery cell is housed inside. The lower case of the connection adapter 75 may have any shape, but the upper and lower cases of the connection adapter 75 may have the same shape as the battery pack 100. Further, since the rectifier circuit using the diode bridge 60 is included in each of the electric tool main bodies 30A to 30C, it is not necessary to include the rectifier circuit in the connection adapter 75. It should be noted that arranging an auxiliary electric circuit in the connection adapter 75 for assisting the operation of the electric circuits included in the electric tool main bodies 30A to 30C is not excluded. In the connection adapter 75, rails (adapter-side rails) not shown are formed on the left and right sides of the upper surface, and the adapter-side rails are formed in the rail groove formed on the electric device body 30B side (the shape is shown in FIG. 3B). The same as the rail grooves 48a and 48b). The connection adapter 75 is provided with the same latch mechanism as the battery pack 100, and a latch button 78 for operating the same. 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 terminals, a positive terminal and a negative terminal, are formed in a portion accessible from two of the slots. (Described later in FIG. 6(2)). 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 the 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. 3(2), and the first adapter side terminal 79a and the second adapter side which are connected for commercial power supply are connected. 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 to be connected to any terminal to the electric tool main body side or in a non-wiring state. Here, the first adapter side terminal 79a of the AC socket 79 is connected to the positive electrode input terminal 81 (see FIG. 4) on the electric tool 30 side by the power line 76a wired in the connection adapter 75 via the adapter side positive terminal 77a. Connected. Similarly, the second adapter-side terminal 79b is connected to the negative electrode input terminal 82 (see FIG. 4) on the electric tool 30 side by the power line 76b wired in the connection adapter 75 via the adapter-side negative terminal 77b. In FIG. 5C, the power cord 90 and the connection adapter 75 correspond to the AC power supply device of the present invention. Although the power cord 90 is configured to be attachable/detachable on the lower surface of the connection adapter 75 by using the AC socket 79 and the connector portion 93, the connection adapter 75 and the connection cord 44 are directly connected to each other to directly connect from the case of the connection adapter 75. The cord 44 may be extended. Further, in order to prevent the AC socket 79 from being exposed to the outside when the power cord 90 is removed, some kind of cap or cover may be provided to close the opening of the AC socket 79.

The circuit diagram of the electric 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 it is connected to the inverter circuit 70 via the diode bridge 60 even when the battery pack 100 is used. did. FIG. 6(2) is a circuit block diagram of the drive control system of the electric tool main body 30C shown in FIG. 5(3). The circuit is basically the same as that 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. Further, the connection adapter 75 is mounted, 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 when mounted on 82, since the alternating current is rectified by the diode bridge 60, the inverter circuit 70 can be operated in the same manner to drive the motor 35. Since battery cells are not included in the connection adapter 75, it is not necessary to provide other connection terminals for signal transmission other than the adapter-side positive terminal 77a and the adapter-side negative terminal 77b. However, any one of the connection terminals may be used to identify to the power tool body 30C that the connection adapter 75 is connected. In this embodiment, the brushless DC motor is driven through the direct current input of 108V DC and the inverter circuit 70. However, the type of motor used is not limited to the brushless motor, and it is driven at about 100 to 120V AC. It may be another motor, for example an AC commutator motor. With this configuration, it is possible to drive an electric power tool using an AC commutator motor with the battery pack 100, and an AC/DC shared power tool can be easily realized.

Next, a battery pack 100 capable of switching the output voltage between 36V and 108V will be described with reference to FIGS. 7 to 9. FIG. 7 is a perspective view showing the external shape of the battery pack 100. The housing of the battery pack 100 is formed by a lower case 101 and an upper case 110 that are vertically divided, and the lower case 101 and the upper case 110 are fixed by four screws (not shown). The upper case 110 has a mounting portion formed with two rails 138a and 138b for mounting on the battery pack mounting portion 40. The battery pack-side rails 138a and 138b are formed 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. 3(2)) formed in the battery pack mounting portion 40 of the electric tool body 30, and the rails 138a and 138b are formed into the rail grooves 48a and 48b. The battery pack 100 is fixed to the power tool main body 30 by operating the latch mechanism in the state of being fitted with. 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. The connecting portion between the lower surface 111 and the upper surface 115 becomes a step portion 112 formed in a stepped shape, and the front side area from the step portion 112 to the upper surface 115 becomes the slot group arrangement area 120 (see FIG. 7(2)). In the slot group placement area 120, a plurality of slots (121 to 124) extending rearward from the front step 112 is formed. Here, the positive electrode terminal insertion opening 121 is arranged on the side closer to the left rail 138b, and the negative electrode terminal insertion opening 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 in a portion sandwiched between the positive electrode terminal insertion port 121 and the negative electrode terminal insertion port 122. Inside the positive electrode terminal insertion opening 121 and the negative electrode terminal insertion opening 122, a metal positive electrode terminal and a negative electrode terminal, which are not visible in the figure, are arranged. Further, a voltage switching unit described later is arranged in a portion (internal space of the upper case 110) overlapping the positions of the low voltage switching member insertion port 123 and the high voltage switching member insertion port 124. In FIG. 7, the slot group arrangement area 120 is illustrated as having only four slots (121 to 124) and the slots other than four are not shown, but for accommodating other connection terminals. You may form a slot. 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 is formed so as to be raised. The outer shape of the raised portion 132 is raised above the upper surface 115, and a recessed stopper portion 131 is formed near the center thereof. The stopper portion 131 serves as a housing and abutting surface when the battery pack 100 is mounted on the protruding portion 24 (see FIG. 2) of the battery pack mounting portion 10, and the protruding portion 24 on the power tool body 1 side serves as a stopper. When it is inserted until it abuts on the portion 131, the plurality of terminals 21 to 23 (see FIG. 2) arranged on the power tool body 1 and the terminal group arranged on the battery pack 100 come into contact with each other and become conductive. .. Inside the stopper portion 131, a slit 134 that is 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 is pushed out to the outside in the vertical direction under the rails 138a and 138b by the action of the spring, and engages with the recesses (not shown) formed in the rail grooves 48a and 48b of the power tool body 30. As a result, the battery pack 100 is prevented from falling off. When the battery pack 100 is attached to the power tool body 1, the slits 134 are covered so that they cannot be visually recognized from the outside. The slit 134 is a wind window used for forcibly flowing cooling air inside the battery pack 100 when the battery pack 100 is connected to a charger (not shown) for charging, and is a power tool body. When mounted on 30, the slit 134, which is the cooling air intake, is closed.

In FIG. 7(1), the terminal portion 20A on the side of the power tool body 1 driven by 36V has a positive electrode input terminal 21 and a negative electrode input terminal 22 made of metal fixed by a terminal mounting portion 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 projection 24A is a switching element integrally formed with the base portion of the terminal portion 20A and is made of synthetic resin. The switching projection 24A itself is used only for moving the rotary terminal base 171 (see FIG. 9) and is not used as a terminal for transmitting electric power or a signal. It may be integrally formed of the same insulating material as that of the base portion.

FIG. 7(2) shows a state of being mounted on the terminal portion 80 on the electric tool main body 30 side driven by 108V. The terminal portion 80 has a positive electrode input terminal 81 and a negative electrode input terminal 82 made of metal fixed to 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 formed. The switching protrusion 84 is a member integrally formed 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. The operator does not care about the setting of the output voltage of the battery pack 100, simply attaches it to the main body of the electrical equipment for 36V or the main body of electrical equipment for 108V, and attaches it by the projection 24A for switching or the projection 84 for switching. The optimum output voltage is selected (switched) for the selected electric device body.

FIG. 8 is a perspective view showing the appearance of a cell pack 150, which is housed inside the battery pack 100 and has a plurality of cells 151 stacked and combined into one pack. FIG. 1A is a perspective view, and FIG. 2B is a side view of the cell 151 as seen from the axial direction. Here, a total of 30 cells 151 of a 14500-diameter secondary battery having a diameter of 14 mm and a length of 50 mm that can be charged and discharged multiple times were stacked. In the cell 151, 10 cells were set as one unit and three cell units 156 to 158 were formed. In each of the cell units 156 to 158, the cells 151 are stacked so that the axes A1 of the cells 151 are parallel to each other, and the cells 151 are arranged so that the directions of the adjacent cells 151 are alternately opposite to each other. The terminal and the negative electrode terminal are connected by a thin metal plate 159 to form 10 series connections. The outermost cylindrical portion of the stacked cells 151 is covered with a separator 152 made of a synthetic resin, which serves as an insulator, so that the cells 151 are held immovably with respect to the separator 152. When a lithium-ion battery (one rated output of 3.6 V) is used as the cell 151, since a rated output of 36 V is obtained from each of the cell units 156 to 158, the + output (plus output of the cell units 156 to 158) is obtained. , The positive electrode terminal) and the-output (negative output, negative electrode terminal) are connected in parallel, and the output from the battery pack 100 can be taken out to be used as a large-capacity power supply of 36V. On the other hand, when the + output and − output 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 axial length is 50 mm, the width direction orthogonal to the axial direction is 124.8 mm, and the height direction orthogonal 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 of the portion occupied by the cells 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 total weight of the battery pack 100 can be reduced to less than 800 g or 2 lb (lb). At present, the lithium-ion battery that is widely used in the battery pack of the power tool is the so-called 18650 size. The 18650 size has a diameter of 18 mm and a length of 65 mm, which slightly exceeds twice the volume of the 14500 size. By weight, it is 46 g, which is twice the size of a 14500 size cell. If 30 cells of 18650 size are stacked to obtain a direct current of 108 V, the weight of the cell will be 1380 g, and the weight of the battery pack itself will be heavy, so that the worker can work while holding it with one hand. It becomes a size and weight that is not practical for the power tool to be used.

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

FIG. 9(1) is a diagram showing a state in which the battery pack 100 is attached to a power tool body or an electric device body having a rating of 36V. The battery pack 100 is configured to include 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, which is a voltage switching element that switches the output voltage of the battery pack 100, is configured to include a rotatable terminal base 171 that is pivotally supported by a swing shaft 172 fixed on the substrate 160. It is provided in a terminal arrangement region in which a connection terminal for a power source is arranged in the mounting direction of 100. The rotary terminal base 171 is located on the inner peripheral side of the connection terminals 173a to 173d by installing a plurality of rectangular rod-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 rotatable terminal base 171 is made of synthetic resin, and two metal connection terminals 173a to 173d are cast into one side and the other side of the swing shaft 172 at intervals. 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 is arranged so that one side is exposed.

The substrate 160 fixes the positive electrode terminal 161 and the negative electrode terminal 162, and at the same time, establishes or changes an electrical connection path from these terminals to the cell units 156 to 158, and a plurality of electrodes (contacts) 176a to 176j. Used to position. A plurality of contact points 176a to 176j are provided in an area above the substrate 160 and partially overlapping with a rotating area of the rotating terminal base 171 and exposed on a lower surface of the rotating terminal base 171. When the connection terminals 173a to 173d come into contact with any of these contacts 176a to 176j, the electrical connection path from the positive electrode terminal 161 to the negative electrode terminal 162 is changed. In the power tool main body 1 for 36V, the switching projection 24A is formed on the terminal portion 20A. The switching protrusion 24A functions as a switching element or a connection element that switches the output voltage, and is provided 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 certain third slot 123 or 124. When the battery pack 100 is mounted on the power tool body, the switching projection 24A pushes the rotary terminal base 171 at the position of the arrow 25, so that the rotary terminal base 171 rotates counterclockwise in a top view. It rotates to the first position shown in FIG. 9(1). It will be appreciated 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 will be appreciated that connection terminal 173c shorts contacts 176i and 176g and connection terminal 173d shorts contacts 176j and 176h. The voltage switching mechanism 170, which is a voltage switching element, is arranged so as to be located at substantially the same height as the position where the positive electrode terminal 161 and the negative electrode terminal 162 are arranged. Therefore, it is not necessary to change the positional relationship of the steps from the lower surface 111 of the battery pack 100 to the upper surface 115.

FIG. 9(2) shows the connection in the state where the rotary terminal base 171 is rotated counterclockwise in the top view by the switching projection 24A as in (1), that is, in the first position. There is. The + side output of the cell unit 156 is directly connected to the positive electrode terminal 161. The + side output of the cell unit 157 is connected to the contact 176b, and the + side output of the cell unit 158 is connected to the contact 176g. The-side output of the cell unit 156 is connected to the contact 176e, the-side output of the cell unit 157 is connected to the contact 176j, and the-side output of the cell unit 158 is directly connected to the negative terminal 162. In this state, the contacts 176d and 176b, the contacts 176e and 176c, the contacts 176i and 176g, and the 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 electrode terminal 161 and the negative electrode terminal 162. When the rotatable terminal base 171 is not in the first position and the battery pack is connected to the 18V electric device main body (first electric device main body), the switching projection is inserted in the middle of mounting. 24A engages with the rotatable terminal base 171 and moves to the first position.

FIG. 10(1) is a diagram showing a state in which the battery pack 100 is attached to a power tool body or an electric device body having a rating of 108V. In a power tool having a rating of 108V, the switching projection 84 is formed on the terminal portion 80, and the projection is not formed at the position of the switching projection 24A of the terminal portion 20 of the 36V device. The switching protrusion 84 functions as a switching element or a connection element that switches the output voltage, and is provided 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 124. When the battery pack 100 is attached to the power 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 contacting one arm of the movable terminal base 171 as indicated by an arrow 84a, the rotatable terminal base 171 is rotated clockwise in a top view to be positioned at the second position. This rotation switches the connection relationship between the connection terminals 173a to 173d of the rotary terminal base 171 and the contacts 176a to 176j. The connection state after switching is shown in FIG. 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 contact points 176d and 176a, the contact points 176e and 176b, and the contact point 176d. The contacts 176i and 176f and the contacts 176j and 176g are connected. As a result, the cell units 156 to 158 are connected in series, and the positive electrode terminal 161 and the negative electrode terminal 162 output direct current having a rating of 108V. It should be noted that a click mechanism or a latch mechanism is provided on the swing shaft 172 of the swingable terminal base 171 which is a swing member, so that the switching projection 24A or the switching projection 84 does not apply a rotational torque more than a predetermined value to the swing member. It is better to configure so as not to swing. Further, since the contacts 176a and 176f are electrodes that are not connected to anywhere, by eliminating them and increasing the electrode interval between the contacts 176b and 176c and the contacts 176g and 176h, the risk of short circuit between adjacent electrodes at the time of switching. May be reduced.

According to this embodiment, also in a cordless power tool, a high voltage equivalent to that of a power tool driven by a commercial power source can be obtained from the battery pack 100, and a high-power portable power tool or electric device can be realized. Even if the number of cells is increased to increase the voltage, 30 lithium cells of 14500 size are used instead of the 18650 size cell, so that the power output is small and lightweight, and the power weight is high. The ratio can be increased. Furthermore, the battery pack 100 of 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, and switches the connection of the cell units 156 to 158 to thereby achieve 36V. Since it is possible to switch the output of 10V and 108V, it is possible to operate a widely used power tool or electric equipment of rated 36V. In addition, in the battery pack 100 of the present embodiment, the voltage switching mechanism 170 that functions as a voltage switching element is arranged at a position 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 arranged. Therefore, the size of the battery pack 100 in the vertical direction can be made compact.

Next, a second embodiment of the present invention will be described with reference to FIGS. Similar to the first embodiment, the second embodiment provides a battery pack 200 capable of switching the output voltage 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 shapes of the battery pack 200 and a terminal portion connected to the battery pack 200. FIG. Shows the state when connected to. The external shape of the battery pack 200 is basically the same as the shape of the battery pack 100 of the first embodiment shown in FIGS. 1 to 8 except for a part (the shape near the slot group arrangement region). ..

In the battery pack 200, 30 cells 151 of a 14500 size lithium ion battery are housed in a housing formed by joining a lower case 201 and an upper case 210, as in the case shown in FIG. If the housing is allowed to be large, 18650 size cells may be used as the cells, or cells having other shapes and sizes may be used. The upper case 210 of the battery pack 200 is formed with an attachment mechanism for attachment to the electric tool main body 1 or the electric tool main body 30 side. The structure and shape of the attachment mechanism are the same as those of the battery of the first embodiment shown in FIG. It has almost the same shape as the pack 100. In the upper case 210, a lower step surface 211 for guiding the terminal part on the electric device side and an upper step surface 215 arranged above the lower step surface 211 are formed, and in the step part 212 which is a boundary between the lower step surface 211 and the upper step surface 215. , A plurality of terminal insertion openings (slots) are formed. Rail portions 238a and 238b that fit into the electric equipment body side groove rail grooves are formed on both left and right edges of the upper surface 215. Here, five terminal insertion ports are shown in the left-right direction, but the number of terminal insertion ports arranged is arbitrary and may be further increased. The raised portion 240 is formed on the upper side of the upper step surface 215, and the latch portions 241 are provided on both left and right sides of the raised portion 240. The latch part 241 is interlocked with the latch claw 241a. A stopper portion and a slit serving as a cooling air inlet are formed in the raised portion 240, but since the shape thereof is the same as that of the first embodiment shown in FIG. 7, the description thereof is omitted here.

FIG. 11(1) shows a case where the device is connected to a 36V-rated electric device main body, electric tool main body 1, and the like. The terminal portion 270 provided on the electric device body 1 side has a narrow width in the left-right direction, and the battery pack 200 has the positive electrode input terminal 271 and the negative electrode input terminal 272 inserted into the two terminal insertion openings 222 and 224 near the center. Be moved as is done. FIG. 11(2) shows a case where it is connected to an electric device main body, a power tool main body 30 and the like having a rating of 108V. The terminal portion 280 of the power tool body 30 has a wider width in the left-right direction with respect to the terminal portion 270, and the region between them is the terminal arrangement region. In the terminal arrangement area, the positive electrode input terminal 281 and the negative electrode input terminal 282 are arranged near both left and right ends, and the connection element 283 is formed at the substantially center in the left and right direction. The length of the connecting element 283 in the longitudinal direction is substantially the same as the positive electrode input terminal 281 and the negative electrode input terminal 282 (strictly speaking, slightly shorter). Further, they have the same size in the height direction. This is because the addition of the connection element 283 for operating the voltage switching element does not need to change the dimensional relationship between the positive input terminal 281 and the negative input terminal 282, so that the voltage switching element is added. That is, it is possible to avoid an increase in the size of the battery pack 200. When the battery pack 200 is attached to the power tool 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. Three cell units 156 to 158 (see FIG. 8B) are housed in the battery pack 200. 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, cells for 10 cells are collectively shown as one battery. One to four connection terminals are arranged in the terminal insertion ports (slots) 221 to 225 for inserting the input terminals on the terminal portions 270 and 280 side by side in the insertion direction of the terminal portions 270 and 280, respectively. The connection terminal group arranged here is 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 section 270 for 36V, and a switching terminal group (terminal group 232 and terminal group 234) for outputting a low voltage is arranged therein. It The positive electrode input terminal 271 is mounted so as to contact the three terminals of the terminal group 232, and the negative electrode input terminal 272 is mounted so as to contact the three terminals of the terminal group 234.

The set of the terminal insertion port 221 and the terminal insertion port 225 corresponds to the terminal portion 280 for 108V, and the switching terminal (the terminal 231 and the terminal group 235) for outputting a high voltage is arranged therein. 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 connecting element 283 for switching the output voltage is further provided at the center of the left and right sides of the terminal unit 280. The connection element 283, which serves as a voltage switching element that switches between parallel connection and series connection, is inserted into the terminal insertion port 223. The connecting element 283 has a leading end side (the side closer to the battery pack 200 in the drawing) conducting portion 283a and a rear end side conducting portion 283c, and an insulator 283b is arranged between these conducting portions 283a and 283c. Thus, the conducting portion 283a and the conducting portion 283c are brought into an electrically non-conducting state. The purpose of the conducting portions 283a and 283c is to function as a short-circuiting element that short-circuits predetermined terminals in the terminal group 233, and it is not necessary to wire from the conducting portions 283a and 283c on the electric device main body side. Therefore, the connection element 283 is manufactured by casting a metal plate forming the conductive portions 283a and 283c on a connection element base made of a non-conductive material integrally formed with the terminal portion 280, or connected by a non-conductive material. It may be manufactured by attaching a metal plate to the outer peripheral surface of the element base or conducting the outer peripheral surface with a conductive material such as metal plating. In this way, the terminal portion 280 is formed by adding a short-circuit element that connects a plurality of cell units in series.

FIG. 13 is a diagram showing the shapes of the terminals 231-235, (1) is a top view, and (2) is a side view of the terminal group 232 (a view from the direction B in (1)). Here, the terminals 231, 235 and the terminals 232a, 233a, 234a have the same shape as the terminals widely used in the past, and the flat plate is bent into a U shape, and both side surfaces near the opening end are convexed inward. It is shaped like a dent, and is formed so that the narrowest part of the convex part comes into contact with both surfaces of the plate-shaped terminal on the terminal part side. The terminals 231, 235, 232a, 233a, 234a have a shape in which the rear side is closed because the metal terminals on the terminal side to be fitted do 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 because the metal terminals on the contacting terminal side are fitted from the front to the rear. An opening is also formed on the rear side. The side view of (2) shows its specific shape. The terminal 232a is closed near the rear of the upper end (arrow 236a), but the terminals 232b and 232c are not only on the front side but also on the rear side (arrow 236b). , 236c) is 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 simultaneously contacts the three terminals 232a to 232c, so that each becomes electrically conductive. This connection state also applies to the negative electrode input terminal 272 and the three terminals 234a to 234c. In this way, in one terminal insertion port, a plurality of terminals are arranged in the same direction as the mounting direction (parallel direction), and the connection state of the cell units 156 to 158 in the battery pack 200 is connected in parallel using the electrode plate of the terminal portion. And can be set to either of the serial state.

FIG. 14 is a diagram showing a state in which the battery pack 200 is attached to the terminal portions 270, 280. (1) shows a 36V output state, and (2) shows a 108V output state. The terminal section 270 for 36 V output shown in (1) has a positive electrode input terminal 271 and a negative electrode input terminal 272. The positive electrode input terminal 271 is brought into conduction by contacting the terminals 232a, 232b, 232c. The terminal 232a is connected to the + terminal (positive electrode) of the cell unit 156, the terminal 232b is connected to the + terminal of the cell unit 157, and the terminal 232c is connected to the + terminal of the cell unit 158. Therefore, the positive electrode input terminal 271 is connected to the + terminals of the three cell units 156 to 158. Similarly, the negative electrode input terminal 272 is brought into conduction by contacting the terminals 234a, 234b, 234c. The terminal 234a is connected to the-terminal (negative electrode) of the cell unit 156, the terminal 234b is connected to the-terminal of the cell unit 157, and the terminal 234c is connected to the-terminal of the cell unit 158. Therefore, the negative electrode input terminal 272 is connected to the-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, direct current having a rating of 36 V is output to the positive electrode input terminal 271 and the negative electrode input terminal 272.

FIG. 14(2) is a diagram showing a state in which the battery pack 200 is attached to the terminal portion 280. The terminal unit 280 at the time of 108 V output has a positive electrode input terminal 281, a negative electrode input terminal 282, and a connecting element 283. The positive electrode input terminal 281 only contacts the terminal 231 connected to the + terminal of the cell unit 156. Similarly, the negative electrode input terminal 282 contacts only the terminal 235 connected to the negative terminal of the cell unit 158. In addition, the connection element 283 (connection terminal) is inserted so as to be in contact with the group of four terminals (serial terminal elements 233a to 233d). By this connecting element 283, the terminal 233a and the terminal 233b are short-circuited by the conducting portion 283a (see FIG. 12), and the terminal 233c and the terminal 233d are short-circuited by the conducting portion 283c (see FIG. 12). Here, a space between the terminals 233b and 233c is 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-terminal of the cell unit 156 and the terminal 233b is connected to the + terminal of the cell unit 157, the series connection state between the cell units 156 and 157 is established. Similarly, since the terminal 233c is connected to the-terminal of the cell unit 157 and the terminal 233d is connected to the + terminal of the cell unit 158, the 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 direct current with a rating of 108 V is output to the positive terminal 231 and the negative terminal 235. Each terminal of the terminal group 232 and the terminal group 234 is opened.

As described above, in the second embodiment, the 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 be used as a power source has been realized. In particular, it is connected to the positive electrode or the negative electrode of a plurality of cell units in the slot 223, and a series terminal group (series terminal elements 233a to 233d) for connecting the plurality of cell units in series is provided, so 36V Thus, the battery pack 200 capable of switching between 108 V and 108 V was realized. At this time, by setting the terminal portion 270 or 280 on the electric tool main body (electrical equipment main body) side to the shape as shown in the drawing, the slot (221 or 222) into which the positive electrode input terminal is inserted and the negative electrode input terminal. In addition to the slots (224 and 225) into which the battery pack is inserted, the third slot (223) into which the switching element (connection element 283) for switching the output voltage is inserted is provided. The output voltage from the pack 200 side is automatically switched. Therefore, the operator does not need to pay attention to the battery voltage switching work, and there is also no risk of damaging the electric device main body side due to a setting voltage error. Furthermore, when the battery pack 200 is removed, the three cell units 156 to 157 are brought into an open state (non-connected state), so that an optimal state can be achieved during storage or transportation. In the battery pack 200 of the second embodiment, the terminal group 232, the terminal group 234 and the connecting element 283 which function as voltage switching elements, and the terminals 231, 235, the terminal group 232 and the terminal group 234 which function as power supply terminals are provided. Since the battery packs 200 are arranged 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 can be effectively applied not only to the voltage switching type battery pack but also to the voltage fixed 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 in which the terminal groups 232 and 234 of FIG. 14(2) are removed, and the terminal insertion openings 222 and 224 (both see FIG. 11) formed at the insertion positions of the terminal groups 232 and 234 are closed. To be done. The electric device body for 108V uses a terminal portion 280 having a positive electrode input terminal 281, a negative electrode input terminal 282, and a connecting element 283. The structure of the terminal portion 280 is the same as the structure shown in FIG. 12, the connecting element 283 has a leading end side conducting portion 283a and a rear end side conducting portion 283c, and these conducting portions 283a and 283c are insulated from each other. It is electrically connected in a non-conductive state by the body 283b. In this way, the plurality of terminal groups are used to establish the series connection state of the cell units 156 to 158 when the terminal unit 280 is connected, and thus when the battery pack 200A is not attached to the electric device (removed). In this case, the three cell units 156 to 158 are brought into a non-connected state, so that an optimal state can be achieved during storage or transportation. Further, by closing the opening portions of the slots 222 and 224, the 108V battery pack 200A can be configured so that it cannot be attached to the 36V electric device body, so that incorrect attachment can be effectively prevented.

FIG. 15(2) 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 target (terminals 231 and 235) as the structure of (1) except that the interval in the left-right direction is widened. However, in (2), the connection element 283 of (1) is divided into two in the left-right direction and is divided into a first connection terminal 285 and a second connection terminal 286. In accordance with this division, the terminals 233a to 233d are arranged separately in the lateral direction. The first connection terminal 285 is a metal plate for short-circuiting the terminal 233b connected to the + terminal side of the cell unit 157 and the terminal 233a 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 − terminal side of the cell unit 157 and the terminal 233d connected to the + terminal side of the cell unit 158. Even in this modification, the same effect as in (1) can be obtained, and the installation space for the terminals 233a and 233b, 223c and 233d can be small, which is advantageous in mounting on an existing battery pack. In the modification of FIG. 15(2), if the terminal insertion openings are provided in six rows in the lateral direction, the 36V output terminal groups 232 and 234 (see FIG. 13) are arranged in the configuration of (2). Therefore, it is possible to realize a battery pack in which the length of terminals in the front-rear direction is shortened.

Various modifications can be made to the above-described embodiment. In the above embodiment, the voltage switching of 18V and 36V is dealt with, but other voltage ratios may be used. Further, the method for joining the upper case and the lower case is not limited to the swing type structure in which the latch is used for fixing, but other known fixing methods may be used. The configuration is not limited to vertically flipping the cell pack with respect to the lower case, but may be horizontally (front-back) flipped.

1, 1A, 30A, 30B, 30C... Power tool body, 2, 32... Housing, 3, 33... Handle part, 4, 34... Operation switch (trigger), 10... Battery pack mounting part, 11a... Rail groove, 12 ... curved portion, 15... battery pack, 18a... rail, 20, 20A... terminal portion, 20a... vertical surface, 20b... horizontal surface, 21... positive electrode input terminal, 22... negative electrode input terminal, 23... LD terminal, 24... protruding portion , 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 ... Recessed portion, 41... Terminal portion, 48a, 48b... Rail groove, 49, 49A... AC socket, 49a... First equipment side terminal, 49b... Second equipment side terminal, 49c... Third equipment side terminal, 51... 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 part, 81... Positive electrode input terminal, 82... Negative electrode input terminal, 84... Switching projection, 90... Power cord, 91... Plug part, 92a... Terminal, 93... Connector part, 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 surface, 112 ... stepped portion, 115 ... upper surface, 120 ... slot group placement area, 121 ... positive electrode terminal insertion port, 122 ... negative electrode terminal insertion port, 123 ... low voltage switching member insertion port, 124 ... High-voltage switching member insertion port, 131... Stopper part, 132... Raised part, 134... Slit (cooling air intake), 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 terminal, 162... Negative terminal, 170... Voltage switching mechanism, 171... Rotating terminal base, 172... Oscillating shaft, 173a-173d... Connection terminal , 176a to 176j... Contacts, 200, 200A, 200B... Battery pack, 201... Lower case, 210... Upper case, 211... Lower surface, 212... Step portion, 215... Upper surface, 221-225... Terminal insertion port, 231 235... Terminal, 232, 233, 234... Terminal group, 232a-232c, 233a-233d, 234a-234c... Terminal, 238a, 238b... Rail part, 240... Raised part, 241... Latch part, 241a... Latch claw, 270, 280, 280A... Terminal part, 271, 281,... Positive electrode input terminal, 272, 282... Negative electrode input terminal, 283... Connection element, 283a... Conducting part, 283b... Insulator, 283c... Conducting part

Claims (8)

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 that has a positive electrode input terminal connectable to a positive electrode terminal of the battery pack and a negative electrode input terminal connectable to a negative electrode 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 body configured to connect an AC power supply device for supplying an AC voltage to the rectifier circuit to the housing,
In the battery pack mounting portion, the AC power supply device is configured to be connectable to a location that is not exposed to the outside when the battery pack is mounted in the battery pack mounting portion. Inside the housing, the rectifier circuit is provided in a circuit connecting 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 to be a DC voltage. The electric equipment body according to claim 1, wherein the electric equipment body is configured to be converted into. A case that can be attached to the battery pack attachment part of the electric device body,
A power cord having one end connected to the case and the other end having a plug portion connectable to a commercial AC power supply,
An output terminal provided on the case and connected to the power cord, comprising: a first adapter-side terminal and a second adapter-side terminal for outputting an AC voltage to the electric device body side. Connection adapter. The electric device body according to claim 2,
A case attachable to the battery pack mounting portion, 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, and an output provided on the case and connected to the power cord An electric device comprising: a terminal, a connection adapter having a first adapter-side terminal and a second adapter-side terminal for outputting an AC voltage to the electric device body side,
When the connection adapter is attached to the battery pack attachment portion, the first adapter side terminal is connected to the positive electrode input terminal, the second adapter side terminal is connected to the negative electrode input terminal, and the power cord is input. An electric device configured such that the generated AC voltage is input to the rectifier circuit. A device-side rail that guides the connection adapter is provided in the battery pack mounting portion of the electric device body, and an adapter-side rail that engages with the device-side rail is provided in the case of the connection adapter. The electric device according to claim 4, wherein: 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 the outside, in addition to the positive electrode input terminal and the negative electrode input terminal,
Inside the housing, a rectifier circuit capable of converting an AC voltage into a DC voltage is provided in a circuit connecting 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 rectification circuit inside the housing. The electric device body according to claim 1, wherein the electric device body is configured to be converted into a DC voltage. A device-side rail that guides the battery pack is provided in the battery pack mounting portion so as to extend in the front-rear direction. 7. The electric device body according to claim 6, wherein: An electric device comprising the electric device body according to claim 6 or 7, and a power cord connected to the electric device body, wherein the power cord is attachable to an AC socket of the electric device body. A connector part, a connection cord whose one end is connected to the connector part, and a plug part which is connected to the other end of the connection cord and is connectable to a commercial AC power supply,
The connector portion includes a first cord side terminal and a second cord side terminal for outputting an AC voltage input from the power cord to the electric device body side,
In the electric device 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 of the power cord is connected. 2 cord side terminals are connected to the second device side terminals of the AC socket,
An electric device, wherein 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.

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