JP7255252B2 - Battery adapter and system with same - Google Patents

Description

The present invention relates to a battery adapter for supplying electric power from a battery pack to an electric device main body and a system including the same.

Patent Literature 1 below relates to a battery pack capable of selectively outputting 36 V or 18 V according to the rated voltage of the main body of the electrical equipment to which it is connected. This battery pack includes an upper cell unit and a lower cell unit each composed of five battery cells. Due to the difference in the shape of the terminal on the side of the electrical device to which the battery pack is connected, the upper cell unit and the lower cell unit are connected in series to output 36V, and the upper cell unit and the lower cell unit are parallel to each other. When it is connected and outputs 18V, it is automatically switched.

On the other hand, there is known a battery adapter configured to have one end connected to a battery pack and the other end connected to an electric device main body so as to supply power from the battery pack to the electric device main body. By using the battery adapter, a heavy battery pack can be supported, for example, around the waist, so that the weight of the battery pack is not placed on the hand and workability can be improved.

WO2018/079723

Current battery adapters are not compatible with battery packs with variable output voltages (hereinafter also referred to as "variable battery packs") as in Patent Document 1, and are inconvenient for users using variable battery packs.

The present invention has been made in recognition of such circumstances, and an object of the present invention is to provide a highly convenient battery adapter and a system including the same.

One aspect of the present invention is a battery adapter. This battery adapter
It has a plurality of cell units including a first cell unit and a second cell unit whose connection state can be switched by connecting the electric device main body, and the output voltage is set to the first level by the terminal structure of the electric device main body to which the electric device main body is connected. One end is connected to a battery pack that sometimes becomes a voltage and a second voltage that is higher than the first voltage, and the other end is connected to the main body of the electric device, and the electric power of the battery pack is supplied to the electric device. A battery adapter configured to supply a main body,
The battery adapter
an input-side interface connected to the battery pack;
an output side interface connected to the electrical equipment main body;
a power line connecting the input-side interface and the output-side interface to transmit power of the battery pack;
and
The input-side interface is
an input-side first positive terminal connected to the battery-side first positive terminal connected to the positive terminal of the first cell unit;
an input-side first negative terminal connected to the battery-side first negative terminal connected to the negative terminal of the first cell unit;
an input-side second positive terminal connected to the battery-side second positive terminal connected to the positive terminal of the second cell unit;
an input-side second negative terminal connected to the battery-side second negative terminal connected to the negative terminal of the second cell unit;
has
The output side interface is
an output-side first positive terminal connected to the input-side first positive terminal through a first positive line of the power line;
an output-side first negative terminal connected to the input-side first negative terminal via a first negative line of the power line;
an output-side second positive terminal connected to the input-side second positive terminal through a second positive line of the power line;
an output-side second negative terminal connected to the input-side second negative terminal via a second negative line of the power line;
has
The output side interface is configured to be connectable to a second electrical equipment main body whose suitable input voltage is the second voltage,
In a state in which the battery pack is connected to the input side interface and the second electric device main body is connected to the output side interface, the series connection element provided in the second electric device main body causes the output side second The positive electrode terminal and the output side first negative electrode terminal are short-circuited, and the voltage between the output side first positive electrode terminal and the output side second negative electrode terminal is the second voltage. Characterized by

The output-side interface is alternatively to the first electric equipment main body whose suitable input voltage is the first voltage, or the second electric equipment main body whose suitable input voltage is the second voltage. may be configured to connect to

Another aspect of the invention is a system. This system
A system comprising the battery adapter, the battery pack, and the first electrical device body,
The first electrical equipment main body has a first main body side switching element configured to engage with the output side interface and set the voltage input from the battery adapter to the first voltage. cage,
When the battery pack is connected to the input-side interface and the first electrical device body is connected to the output-side interface, the output-side interface engages with the first body-side switching element to It is characterized by having a first adapter-side switching element configured to output a first voltage.

The first body-side switching element may have a parallel connection element that connects the plurality of cell units in parallel.

Another aspect of the invention is a system. This system
A system comprising the battery adapter, the battery pack, and the second electrical device body,
The second electrical equipment main body has a second main body side switching element configured to engage with the output side interface and set the voltage input from the battery adapter to the second voltage. cage,
When the battery pack is connected to the input-side interface and the second electrical device body is connected to the output-side interface, the output-side interface engages with the second body-side switching element to It comprises a second adapter-side switching element configured to output a second voltage.

The second body-side switching element may have the series connection element that connects the plurality of cell units in series.

Another aspect of the invention is a system. This system
A system comprising the battery adapter, the battery pack, and the second electrical device body,
The output-side interface is unconnectable to a first electrical equipment main body whose suitable input voltage is the first voltage , and is configured to be connectable to the second electrical equipment main body. .

Any combination of the above-described constituent elements and conversion of expressions of the present invention between methods are also effective as aspects of the present invention.

ADVANTAGE OF THE INVENTION According to this invention, a highly convenient battery adapter and a system provided with the same can be provided.

1 is a conceptual diagram of a system in which a battery pack 10 is directly connected to a first electrical equipment body 80 with a rated voltage of 18V and a second electrical equipment body 90 with a rated voltage of 36V. 1 is a conceptual diagram of a system according to Embodiment 1 of the present invention, in which a battery pack 10 is connected to a first electrical equipment body 80 and a second electrical equipment body 90 via a battery adapter 20, respectively; FIG. FIG. 2 is an external view of a system in which a battery pack 10 is connected to a first electrical equipment body 80 via a battery adapter 20; FIG. 2 is an explanatory view of attaching the battery pack 10 to the input side interface 21 of the battery adapter 20; FIG. 3 is an explanatory view of attaching the output-side interface 23 of the battery adapter 20 to the battery connecting portion 81 of the first electric device main body 80; FIG. 10 is an explanatory diagram of attachment of the output side interface 23 to the battery connecting portion 91 of the second electric device main body 90; 2 is a cross-sectional view of an input-side interface 21; FIG. FIG. 3 is a perspective view showing connection portions between terminals of the battery pack 10 and the input-side interface 21; FIG. 9 is a perspective view of the terminal block 25 and the input signal terminal 30 omitting the terminal block 25 and the input side signal terminal 30 of the connecting portion between the terminals of the battery pack 10 and the input side interface 21 as viewed from a direction different from that in FIG. 8 ; FIG. 2 is an explanatory view showing connection between terminals of an input side interface 21 and an output side interface 23 by a cable 22; FIG. 3 is a perspective view showing a connecting portion between terminals of an output side interface 23 and a first electrical equipment main body 80; FIG. 12 is a perspective view in which the terminal block 82 and the device-side signal terminal 86 are omitted from FIG. 11; 4 is a perspective view showing a connecting portion between terminals of the output-side interface 23 and the second electrical equipment main body 90. FIG. FIG. 14 is a perspective view in which the terminal block 92 and the device-side signal terminal 96 are omitted from FIG. 13; FIG. 2 is a perspective view showing a state in which terminals of the battery pack 10 are mounted on a board 17; FIG. 4 is a perspective view showing a state in which terminals of an output-side interface 23 are mounted on a substrate 40; Sectional drawing of the cable 22. FIG. 3 is a simplified block diagram of the system shown in FIG. 2; FIG. FIG. 7 is a conceptual diagram of a system according to Embodiment 2 of the present invention, in which a battery pack 10 is connected to a first electrical equipment body 80 via a battery adapter 50; 3 is a cross-sectional view of an input-side interface 51 of the battery adapter 50; FIG. 4 is a front view of the output-side interface 53 of the battery adapter 50 as seen from the front with the upper case removed. FIG. FIG. 11 is a conceptual diagram of a system according to Embodiment 3 of the present invention, in which a battery pack 10 is connected to a second electrical equipment body 90 via a battery adapter 60; 4 is a cross-sectional view of an input-side interface 61 of the battery adapter 60; FIG. 4 is a front view of the output-side interface 63 of the battery adapter 60 viewed from the front with the upper case removed; FIG. FIG. 4 is an explanatory diagram showing whether or not the output-side interfaces 53 and 63 and the battery connection units 81 and 91 can be connected.

Preferred embodiments of the present invention will be described in detail below with reference to the drawings. The same or equivalent constituent elements, members, etc. shown in each drawing are denoted by the same reference numerals, and duplication of description will be omitted as appropriate. Moreover, the embodiments are illustrative rather than limiting the invention, and not all features and combinations thereof described in the embodiments are necessarily essential to the invention.

(Embodiment 1)
Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 18. FIG. The present embodiment relates to a battery adapter 20, a system in which the battery pack 10 and the first electrical equipment main body 80 or the second electrical equipment main body 90 are connected by the battery adapter 20, and the input side interface 21.

As shown in FIG. 1, the battery pack 10 is directly connected to both a first electrical equipment body 80 with a rated voltage (suitable input voltage) of 18V and a second electrical equipment body 90 with a rated voltage of 36V. be able to. The battery pack 10 , when connected to the first electrical equipment main body 80 , outputs 18V as the first voltage to the first electrical equipment main body 80 . The battery pack 10 , when connected to the second electrical equipment body 90 , outputs 36 V as the second voltage to the second electrical equipment body 90 . That is, the battery pack 10 is a variable battery pack capable of switching the output voltage between 18V and 36V. The switching of the output voltage of the battery pack 10 is automatically performed by the terminals of the main body of the electrical equipment to which it is connected, as will be described later.

The battery pack 10 has a first cell unit 11 and a second cell unit 12 . The first cell unit 11 and the second cell unit 12 each have five battery cells connected in series. Each battery cell has a rated output voltage of 3.6V. The battery pack 10 has a battery-side first positive terminal 13 , a battery-side second positive terminal 14 , a battery-side first negative terminal 16 , and a battery-side second negative terminal 15 . The battery-side first positive terminal 13 is connected to the positive terminal of the first cell unit 11 . The battery-side second positive terminal 14 is connected to the positive terminal of the second cell unit 12 . The battery-side first negative terminal 16 is connected to the negative terminal of the first cell unit 11 . The battery-side second negative terminal 15 is connected to the negative terminal of the second cell unit 12 .

The device-side positive electrode terminal 83 of the first electrical device main body 80 is a single plate that is sandwiched between and electrically connected to the battery-side first positive electrode terminal 13 and the battery-side second positive electrode terminal 14. The first positive terminal 13 and the second battery-side positive terminal 14 are short-circuited. The device-side negative electrode terminal 85 of the first electrical device main body 80 is a single plate that is sandwiched between and electrically connected to the battery-side first negative electrode terminal 16 and the battery-side second negative electrode terminal 15. The first negative terminal 16 and the second negative terminal 15 on the battery side are short-circuited. The device-side positive terminal 83 and the device-side negative terminal 85 are parallel connection elements that connect the first cell unit 11 and the second cell unit 12 in parallel. When the battery pack 10 is connected to the first electrical device body 80, the voltage between the device-side positive terminal 83 and the device-side negative terminal 85, that is, the output voltage of the battery pack 10 is 18V.

The device-side positive electrode terminal 93 of the second electrical device main body 90 is sandwiched and electrically connected to the battery-side first positive electrode terminal 13 . The device-side negative terminal 95 of the second electrical device body 90 is sandwiched and electrically connected to the battery-side second negative terminal 15 . The short bar 97 of the second electrical device main body 90 has one end sandwiched by the battery side second positive electrode terminal 14 and the other end sandwiched by the battery side first negative electrode terminal 16, so that the battery side second positive electrode terminal 14 and the battery side The first negative terminal 16 is short-circuited. The short bar 97 is a series connection element that connects the first cell unit 11 and the second cell unit 12 in series with each other. When the battery pack 10 is connected to the second electrical device body 90, the voltage between the device-side positive terminal 93 and the device-side negative terminal 95, that is, the output voltage of the battery pack 10 is 36V.

As shown in FIGS. 2 and 3 , the battery adapter 20 includes an input side interface 21 , a cable 22 as a power line, and an output side interface 23 . An input side interface 21 is provided at one end of the cable 22 and an output side interface 23 is provided at the other end of the cable 22 . The cable 22 is a multi-core cable, as shown in FIG. 17, and contains a plurality of conductive wires insulated from each other. As shown in FIG. 4 , the battery pack 10 can be detachably attached to the input side interface 21 by sliding the battery pack 10 forward with respect to the input side interface 21 . As shown in FIGS. 5 and 6, the output side interface 23 is slid forward with respect to the battery connection portion 81 at the lower end of the first electric device main body 80 or the battery connection portion 91 at the lower end of the second electric device main body 90. By doing so, the output-side interface 23 can be alternatively attached to the battery connection portions 81 and 91 .

The battery pack 10 connected to the input side interface 21 outputs 18V to the first electric device main body 80 via the battery adapter 20 when the output side interface 23 is connected to the first electric device main body 80. do. The battery pack 10 connected to the input side interface 21 outputs 36 V to the second electrical equipment main body 90 via the battery adapter 20 when the output side interface 23 is connected to the second electrical equipment main body 90. do. Even when the battery adapter 20 is used, the switching of the output voltage of the battery pack 10 is automatically performed by the terminal of the main body of the electrical equipment to which it is connected, as will be described later.

The input side interface 21 has an input side first positive terminal 26 , an input side second positive terminal 27 , an input side first negative terminal 29 and an input side second negative terminal 28 . The input-side first positive electrode terminal 26 is sandwiched and electrically connected to the battery-side first positive electrode terminal 13 . The input-side second positive electrode terminal 27 is sandwiched and electrically connected to the battery-side second positive electrode terminal 14 . The input-side first negative terminal 29 is sandwiched and electrically connected to the battery-side first negative terminal 16 . The input-side second negative terminal 28 is sandwiched and electrically connected to the battery-side second negative terminal 15 .

The output-side interface 23 has a first output-side positive terminal 36 , a second output-side positive terminal 37 , a first output-side negative terminal 39 , and a second output-side negative terminal 38 . These four terminals are examples of the first adapter-side switching element and examples of the second adapter-side switching element. The output-side first positive electrode terminal 36 is electrically connected to the input-side first positive electrode terminal 26 by the first positive electrode line 22a of the cable 22 (FIG. 17). The output-side second positive electrode terminal 37 is electrically connected to the input-side second positive electrode terminal 27 by a second positive electrode line 22 b (same) of the cable 22 . The output-side first negative electrode terminal 39 is electrically connected to the input-side first negative electrode terminal 29 by the first negative electrode line 22 c (same) of the cable 22 . The output-side second negative terminal 38 is electrically connected to the input-side second negative terminal 28 by a second negative line 22 d (same) of the cable 22 . Each terminal of the output side interface 23 and each terminal of the input side interface 21 may be connected via a conductive pattern on the substrate 40 (FIG. 16) in addition to the cable 22 .

The device-side positive electrode terminal 83 of the first electrical device main body 80 is a single plate sandwiched between and electrically connected to the output-side first positive electrode terminal 36 and the output-side second positive electrode terminal 37. The first positive electrode terminal 36 and the second output-side positive electrode terminal 37 are short-circuited. The device-side negative terminal 85 of the first electrical device main body 80 is a single plate sandwiched between and electrically connected to the output-side first negative electrode terminal 39 and the output-side second negative electrode terminal 38. The first negative terminal 39 and the second output-side negative terminal 38 are short-circuited. The device-side positive terminal 83 and the device-side negative terminal 85 are engaged with the output-side first positive terminal 36 , the output-side second positive terminal 37 , the output-side first negative terminal 39 , and the output-side second negative terminal 38 . A first body-side switching element configured to set the voltage input from the battery adapter 20 to 18 V, and a parallel connection element that connects the first cell unit 11 and the second cell unit 12 in parallel. . When the output-side interface 23 is connected to the first electrical device body 80, the voltage between the device-side positive terminal 83 and the device-side negative terminal 85, that is, the output voltage of the battery pack 10 is 18V.

The device-side positive terminal 93 of the second electrical device main body 90 is sandwiched and electrically connected to the output-side first positive terminal 36 . The device-side negative terminal 95 of the second electrical device body 90 is sandwiched and electrically connected to the output-side second negative terminal 38 . The short bar 97 of the second electrical equipment body 90 has one end sandwiched by the output side second positive electrode terminal 37 and the other end sandwiched by the output side first negative electrode terminal 39, and the output side second positive electrode terminal 37 and the output side The first negative terminal 39 is short-circuited. The device-side positive terminal 93 , the device-side negative terminal 95 , and the short bar 97 are connected to the output-side first positive terminal 36 , the output-side second positive terminal 37 , the output-side first negative terminal 39 , and the output-side second negative terminal 38 . , to set the voltage input from the battery adapter 20 to 36V. The short bar 97 is a series connection element that connects the first cell unit 11 and the second cell unit 12 in series with each other. When the output-side interface 23 is connected to the second electrical device body 90, the voltage between the device-side positive terminal 93 and the device-side negative terminal 95, that is, the output voltage of the battery pack 10 is 36V.

As shown in FIG. 7, the input side interface 21 has a terminal block 25 inside an adapter input side housing 24 . As shown in FIGS. 8 and 10, the terminal block 25 includes an input first positive terminal 26, an input second positive terminal 27, an input first negative terminal 29, an input second negative terminal 28, and an input terminal. A signal terminal 30 is retained. Although there are four input-side signal terminals 30 here, the number is arbitrary. In FIG. 8, the illustration of the terminals of the battery pack 10 other than the battery-side first positive terminal 13, the battery-side second positive terminal 14, the battery-side first negative terminal 16, and the battery-side second negative terminal 15 is omitted. there is In FIG. 10, the illustration of the terminals of the output-side interface 23 other than the output-side first positive terminal 36, the output-side second positive terminal 37, the output-side first negative terminal 39, and the output-side second negative terminal 38 is omitted. (The same applies to FIGS. 11 and 13 described later).

As shown in FIG. 9, the input-side first positive terminal 26 is connected by soldering or the like to one end of the first positive line 22a of the cable 22 and a terminal connecting portion 26a sandwiched between the battery-side first positive terminals 13. and a wiring connection portion 26b. The input-side second positive electrode terminal 27 includes a terminal connection portion 27a sandwiched by the battery-side second positive electrode terminal 14, a wiring connection portion 27b to which one end of the second positive electrode line 22b of the cable 22 is connected by soldering or the like, have The terminal connection portions 26a and 27a are located at the same positions in the horizontal direction and are arranged in the vertical direction.

The input-side first negative electrode terminal 29 includes a terminal connection portion 29a sandwiched by the battery-side first negative electrode terminal 16, a wiring connection portion 29b to which one end of the first negative electrode line 22c of the cable 22 is connected by soldering or the like, have The input-side second negative electrode terminal 28 includes a terminal connection portion 28a sandwiched by the battery-side second negative electrode terminal 15, a wiring connection portion 28b to which one end of the second negative electrode line 22d of the cable 22 is connected by soldering or the like, have The terminal connection portions 29a and 28a are located at the same positions in the horizontal direction and are arranged in the vertical direction.

As shown in FIGS. 7 and 10, the wiring connection portion 26b of the input-side first positive electrode terminal 26 and the wiring connection portion 27b of the input-side second positive electrode terminal 27 are arranged on different surfaces of the terminal block 25. (each projecting from a different side of the terminal block 25). Similarly, the wiring connection portion 29b of the first negative input terminal 29 and the wiring connection portion 28b of the second negative input terminal 28 are arranged on different surfaces of the terminal block 25 (different surfaces of the terminal block 25). each protruding from the face).

The terminal connection portion 26 a of the first positive electrode terminal 26 on the input side and the terminal connection portion 27 a of the second positive electrode terminal 27 on the input side are located at substantially the same position in the width direction (horizontal direction) of the terminal block 25 on the rear side of the terminal block 25 . (facing the surface) to the rear. The wiring connection portion 26b of the input-side first positive electrode terminal 26 protrudes upward from the upper surface of the terminal block 25 (in the direction away from the battery pack 10 connected to the input-side interface 21). The wiring connection portion 27b of the second positive electrode terminal 27 on the input side protrudes forward from the front surface of the terminal block 25 (in a direction parallel to the direction of slide connection of the interface 21 on the input side to the battery pack 10).

The terminal connection portion 29a of the first negative electrode terminal 29 on the input side and the terminal connection portion 28a of the second negative electrode terminal 28 on the input side are located at substantially the same position in the width direction (horizontal direction) of the terminal block 25 on the rear side of the terminal block 25. (facing the surface) to the rear. The wiring connection portion 29b of the first negative electrode terminal 29 on the input side protrudes forward from the front surface of the terminal block 25 (in a direction parallel to the direction in which the interface 21 on the input side is slidably connected to the battery pack 10). The wiring connection portion 28b of the input-side second negative terminal 28 protrudes upward from the upper surface of the terminal block 25 (in the direction away from the battery pack 10 connected to the input-side interface 21).

As shown in FIG. 11 , in the battery connection portion 81 of the first electrical device main body 80 , the device-side positive terminal 83 , the device-side negative terminal 85 , and the device-side signal terminal 86 are held by the terminal block 82 . Although there are four device-side signal terminals 86 here, the number is arbitrary. As shown in FIG. 13 , in the battery connection portion 91 of the second electrical device body 90 , the device-side positive terminal 93 , the device-side negative terminal 95 , the device-side signal terminal 96 , and the short bar 97 are held by the terminal block 92 . be done. Although there are four device-side signal terminals 96 here, the number is arbitrary.

As shown in FIG. 15, in the battery pack 10, a battery side first positive terminal 13, a battery side second positive terminal 14, a battery side first negative terminal 16, a battery side second negative terminal 15, a second A first charging terminal 18a, a second charging terminal 18b, and a battery side signal terminal 19 are provided. The first charging terminal 18a and the second charging terminal 18b are located at the same position in the left-right direction, and the portions that sandwich the counterpart terminals are aligned in the up-down direction. The first battery-side positive electrode terminal 13 and the second battery-side positive electrode terminal 14 are located at the same position in the left-right direction, and the portions for sandwiching the mating terminals are arranged vertically. The first battery-side negative electrode terminal 16 and the second battery-side negative electrode terminal 15 are located at the same position in the left-right direction, and the portions holding the mating terminals are arranged vertically. The first charging terminal 18a and the second charging terminal 18b are for connection with a charger (not shown). Although there are four battery-side signal terminals 19 here, the number is arbitrary.

As shown in FIG. 16, in the output side interface 23, on the substrate 40, the output side first positive terminal 36, the output side second positive terminal 37, the output side first negative terminal 39, the output side second negative terminal 38, and an output signal terminal 41 are provided. The output-side first positive electrode terminal 36 and the output-side second positive electrode terminal 37 are located at the same positions in the left-right direction, and the portions that sandwich the mating terminals are arranged vertically. The output-side first negative terminal 39 and the output-side second negative terminal 38 are located at the same position in the left-right direction, and the portions that hold the mating terminals are arranged in the vertical direction. Although there are four output-side signal terminals 41 here, the number is arbitrary. The input-side signal terminal 30 of the input-side interface 21 and the output-side signal terminal 41 of the output-side interface 23 are electrically connected to each other by the signal line 22 e of the cable 22 . As shown in FIG. 18, the output side interface 23 incorporates a controller, and can monitor the input/output voltage of the battery adapter 20 and the current flowing through the battery adapter 20 .

According to this embodiment, the following effects can be obtained.

(1) The input-side interface 21 of the battery adapter 20 is configured so as to be connectable to the battery pack 10, which is a variable battery pack, and is highly convenient.

(2) The output-side interface 23 of the battery adapter 20 can be selectively attached to the first electrical equipment main body 80 having a rated voltage of 18V and the second electrical equipment main body 90 having a rated voltage of 36V. highly sexual.

(3) In the input side interface 21, the wiring connection portion 26b of the first positive input terminal 26 and the wiring connection portion 27b of the second positive input terminal 27 are arranged on different surfaces of the terminal block 25 ( project from different surfaces of the terminal block 25), it is possible to prevent the wiring connection portions 26b and 27b from being short-circuited when wiring is connected to the wiring connection portions 26b and 27b by soldering or the like. Similarly, the wiring connection portion 29b of the first negative input terminal 29 and the wiring connection portion 28b of the second negative input terminal 28 are arranged on different surfaces of the terminal block 25 (different surfaces of the terminal block 25). project from the surface), it is possible to prevent the wiring connection portions 29b and 28b from being short-circuited when wiring is connected to the wiring connection portions 29b and 28b by soldering or the like.

(4) When the output-side interface 23 is connected to the first electrical equipment body 80, the cable 22 transmits 18 V with two wires, which makes it possible to handle a large current compared to transmission with only one wire. It is possible to increase the output.

(Embodiment 2)
Embodiment 2 of the present invention will be described with reference to FIGS. 19 to 21. FIG. The present embodiment relates to a battery adapter 50 and a system in which the battery pack 10 and the first electrical equipment body 80 are connected to each other by the battery adapter 50 . Battery adapter 50 is for 18V output only.

As shown in FIG. 19 , the battery adapter 50 includes an input side interface 51 , a cable 52 as a power line, and an output side interface 53 . An input side interface 51 is provided at one end of the cable 52 and an output side interface 53 is provided at the other end of the cable 52 . The cable 52 is a multicore cable and contains a plurality of conductive wires insulated from each other. The input-side interface 51 can be attached by sliding the battery pack 10 in the same manner as the input-side interface 21 . The output-side interface 53 can be slidably attached to the battery connecting portion 81 at the lower end of the first electrical device main body 80 in the same manner as the output-side interface 23 . On the other hand, as will be described later with reference to FIG. 25 , the output side interface 53 is not connectable to the battery connecting portion 91 at the lower end of the second electrical equipment main body 90 .

The input side interface 51 has an input side positive terminal 56 and an input side negative terminal 57 . The input-side positive electrode terminal 56 is a single plate sandwiched between and electrically connected to the battery-side first positive electrode terminal 13 and the battery-side second positive electrode terminal 14 . The second positive terminal 14 is short-circuited. The input-side negative electrode terminal 57 is a single plate sandwiched between and electrically connected to the battery-side first negative electrode terminal 16 and the battery-side second negative electrode terminal 15 . The second negative terminal 15 is short-circuited. The input-side positive terminal 56 and the input-side negative terminal 57 are engaged with the battery-side first positive terminal 13 , the battery-side second positive terminal 14 , the battery-side first negative terminal 16 , and the battery-side second negative terminal 15 . It is a third adapter-side switching element configured to set the voltage input from the battery pack 10 to 18V, and is a parallel connection element that connects the first cell unit 11 and the second cell unit 12 in parallel. When the battery pack 10 is connected to the input side interface 51, the output voltage of the battery pack 10 is 18V.

The output-side interface 53 has an output-side positive terminal 58 and an output-side negative terminal 59 . The output-side positive terminal 58 is electrically connected to the input-side positive terminal 56 by a cable 52 . The output-side positive terminal 58 sandwiches the device-side positive terminal 83 of the first electrical device body 80 and is electrically connected to the device-side positive terminal 83 . The output side negative terminal 59 is electrically connected to the input side negative terminal 57 by a cable 52 . The output-side negative terminal 59 sandwiches the device-side negative terminal 85 of the first electrical device body 80 and is electrically connected to the device-side negative terminal 85 . The output side interface 53 has an arbitrary number of output side signal terminals 55 . Although not shown, the input side interface 51 has an arbitrary number of input side signal terminals.

According to the present embodiment, the input side interface 51 of the battery adapter 50 is configured to be connectable to the battery pack 10, which is a variable battery pack, and thus is highly convenient. The battery adapter 50 is only for 18V output, and the output side interface 53 cannot be connected to the second electrical equipment body 90 with a rated voltage of 36V. You can suppress the connection.

(Embodiment 3)
Embodiment 3 of the present invention will be described with reference to FIGS. 22 to 24. FIG. The present embodiment relates to a battery adapter 60 and a system in which the battery pack 10 and the second electrical equipment body 90 are connected to each other by the battery adapter 60 . Battery adapter 60 is for 36V output only.

As shown in FIG. 22 , the battery adapter 60 includes an input side interface 61 , a cable 62 as a power line, and an output side interface 63 . An input side interface 61 is provided at one end of the cable 62 and an output side interface 63 is provided at the other end of the cable 62 . The cable 62 is a multicore cable and contains a plurality of conductive wires insulated from each other. The input side interface 61 can be attached by sliding the battery pack 10 like the input side interface 21 . The output-side interface 63 can be slidably attached to the battery connecting portion 91 at the lower end of the second electrical device main body 90 in the same manner as the output-side interface 23 . On the other hand, as will be described later with reference to FIG. 25, the output side interface 63 is not connectable to the battery connecting portion 81 at the lower end of the first electrical equipment body 80 .

The input side interface 61 has an input side positive terminal 66 , an input side negative terminal 67 and a short bar 70 . The input-side positive electrode terminal 66 is sandwiched and electrically connected to the battery-side first positive electrode terminal 13 . The input-side negative terminal 67 is sandwiched and electrically connected to the battery-side second negative terminal 15 . The short bar 70 has one end sandwiched by the battery side second positive terminal 14 and the other end sandwiched by the battery side first negative terminal 16 to short-circuit the battery side second positive terminal 14 and the battery side first negative terminal 16 . do. The input-side positive terminal 66 , the input-side negative terminal 67 , and the short bar 70 are connected to the battery-side first positive terminal 13 , the battery-side second positive terminal 14 , the battery-side first negative terminal 16 , and the battery-side second negative terminal 15 . to set the voltage input from the battery pack 10 to 36V. The short bar 70 is a series connection element that connects the first cell unit 11 and the second cell unit 12 in series with each other. When the battery pack 10 is connected to the input side interface 61, the output voltage of the battery pack 10 is 36V.

The output-side interface 63 has an output-side positive terminal 68 and an output-side negative terminal 69 . The output-side positive terminal 68 is electrically connected to the input-side positive terminal 66 by a cable 62 . The output-side positive terminal 68 is electrically connected to the device-side positive terminal 93 of the second electrical device main body 90 by sandwiching the device-side positive terminal 93 . The output side negative terminal 69 is electrically connected to the input side negative terminal 67 by a cable 62 . The output-side negative terminal 69 sandwiches the device-side negative terminal 95 of the second electrical device body 90 and is electrically connected to the device-side negative terminal 95 . The output side interface 63 has an arbitrary number of output side signal terminals 65 . Although not shown, the input side interface 61 has an arbitrary number of input side signal terminals.

According to the present embodiment, the input side interface 61 of the battery adapter 60 is configured to be connectable to the battery pack 10, which is a variable battery pack, so convenience is high. The battery adapter 60 is only for 36V output, and the output side interface 63 cannot be connected to the first electrical device body 80 with a rated voltage of 18V. You can suppress the connection.

FIG. 25 is an explanatory diagram showing whether or not the output side interfaces 53 and 63 and the battery connection units 81 and 91 can be connected. In Embodiments 2 and 3, the battery connection portion 81 of the first electric device main body 80 is provided with a convex portion (protrusion) 88 that faces downward, and the battery connection portion 91 of the second electric device main body 90 is provided with a convex portion (protrusion) 88 that faces downward. A convex portion (protruding line) 98 is provided. The output-side interface 53 has a concave portion (concave groove) 54 that matches the position of the convex portion 88 in the left-right direction. The horizontal position of the concave portion 54 is different from that of the convex portion 98 . The output-side interface 63 has a concave portion (concave groove) 64 that matches the position of the convex portion 98 in the left-right direction. The horizontal position of the concave portion 64 is different from that of the convex portion 88 .

When the output-side interface 53 is slidably connected to the battery connecting portion 81, the convex portion 88 engages (enters) the concave portion 54, so that the outer shell portions of the battery connecting portion 81 and the output-side interface 53 do not interfere with each other. , the connection is possible. On the other hand, since the position of the recess 54 is different from that of the projection 98 in the left-right direction, even if the output-side interface 53 is slidably connected to the battery connection part 91, the projection 98 interferes with the upper part of the outer shell of the output-side interface 53. and cannot connect.

When the output side interface 63 is slidably connected to the battery connection portion 91, the convex portion 98 engages (enters) the concave portion 64, so that the outer shell portions of the battery connection portion 91 and the output side interface 63 do not interfere with each other. , the connection is possible. On the other hand, since the position of the recess 64 is different from that of the protrusion 88 in the left-right direction, even if the output-side interface 63 is slidably connected to the battery connecting portion 81, the protrusion 88 interferes with the upper portion of the outer shell of the output-side interface 63. and cannot connect.

Although the present invention has been described above with reference to the embodiments, it will be understood by those skilled in the art that various modifications can be made to each component and each processing process of the embodiments within the scope of the claims. By the way. Modifications will be discussed below.

In Embodiments 2 and 3, the configuration for switching the output voltage of the battery pack 10 between 18 V and 36 V by the terminal structure of the input side interfaces 51 and 61 has been described, but the switching configuration can be arbitrarily changed. For example, the battery pack 10 may be provided with a switch for switching the output voltage, and only one of the input interfaces 51 and 61 may be provided with a pressing portion for pressing the switch, thereby switching the output voltage of the battery pack 10 . Specific numerical values such as voltage values shown in the embodiments are examples, and can be arbitrarily changed. In the embodiments, the electric tool main body is exemplified as the electric device main body, but the electric device main body may be a main body of an electric device other than the electric tool. The terminal structure of the input-side interface 21 of Embodiment 1 may be applied to the terminal structure of the battery connecting portion of the electrical equipment main body, and the applied electrical equipment main body is also included in the scope of the present invention.

10 battery pack 11 first cell unit 12 second cell unit 13 battery side first positive terminal 14 battery side second positive terminal 15 battery side second negative terminal 16 battery side first negative terminal 17 substrate , 18a first charging terminal, 18b second charging terminal, 19 battery side signal terminal,
20 Battery Adapter, 21 Input Interface, 22 Cable, 22a First Positive Line, 22b Second Positive Line, 22c First Negative Line, 22d Second Negative Line, 22e Signal Line, 23 Output Interface, 24 Adapter Input Housing , 25 terminal block, 26 input side first positive electrode terminal, 26a terminal connection portion, 26b wiring connection portion, 27 input side second positive electrode terminal, 27a terminal connection portion, 27b wiring connection portion, 28 input side second negative electrode terminal, 28a Terminal connection portion 28b Wiring connection portion 29 Input side first negative electrode terminal 29a Terminal connection portion 29b Wiring connection portion 30 Input side signal terminal 36 Output side first positive electrode terminal 37 Output side second positive electrode terminal 38 output-side second negative electrode terminal 39 output-side first negative electrode terminal 40 substrate 41 output-side signal terminal;
50 battery adapter, 51 input side interface, 52 cable, 53 output side interface, 54 recess, 55 output side signal terminal, 56 input side positive terminal, 57 input side negative terminal, 58 output side positive terminal, 59 output side negative terminal,
60 battery adapter, 61 input side interface, 62 cable, 63 output side interface, 64 recess, 66 input side positive terminal, 67 input side negative terminal, 68 output side positive terminal, 69 output side negative terminal, 70 short bar,
80 first electric device main body (18V power tool main body), 81 battery connection portion, 82 terminal block, 83 device side positive terminal, 85 device side negative terminal, 86 device side signal terminal, 88 convex portion,
90 second electric device main body (36V power tool main body), 91 battery connection portion, 92 terminal block, 93 device side positive terminal, 95 device side negative terminal, 96 device side signal terminal, 97 short bar, 98 convex portion.

Claims (7)

It has a plurality of cell units including a first cell unit and a second cell unit whose connection state can be switched by connecting the electric device main body, and the output voltage is set to the first level by the terminal structure of the electric device main body to which the electric device main body is connected. One end is connected to a battery pack that sometimes becomes a voltage and a second voltage that is higher than the first voltage, and the other end is connected to the main body of the electric device, and the electric power of the battery pack is supplied to the electric device. A battery adapter configured to supply a main body,
The battery adapter
an input-side interface connected to the battery pack;
an output side interface connected to the electrical equipment main body;
a power line connecting the input-side interface and the output-side interface to transmit power of the battery pack;
and
The input-side interface is
an input-side first positive terminal connected to the battery-side first positive terminal connected to the positive terminal of the first cell unit;
an input-side first negative terminal connected to the battery-side first negative terminal connected to the negative terminal of the first cell unit;
an input-side second positive terminal connected to the battery-side second positive terminal connected to the positive terminal of the second cell unit;
an input-side second negative terminal connected to the battery-side second negative terminal connected to the negative terminal of the second cell unit;
has
The output side interface is
an output-side first positive terminal connected to the input-side first positive terminal through a first positive line of the power line;
an output-side first negative terminal connected to the input-side first negative terminal via a first negative line of the power line;
an output-side second positive terminal connected to the input-side second positive terminal through a second positive line of the power line;
an output-side second negative terminal connected to the input-side second negative terminal via a second negative line of the power line;
has
The output side interface is configured to be connectable to a second electrical equipment body whose suitable input voltage is the second voltage,
In a state in which the battery pack is connected to the input side interface and the second electric device main body is connected to the output side interface, the series connection element provided in the second electric device main body causes the output side second The positive electrode terminal and the output side first negative electrode terminal are short-circuited, and the voltage between the output side first positive electrode terminal and the output side second negative electrode terminal is set to the second voltage. Characterized battery adapter. A battery adapter according to claim 1,
The output-side interface is alternatively to the first electric equipment main body whose suitable input voltage is the first voltage, or the second electric equipment main body whose suitable input voltage is the second voltage. A battery adapter, characterized in that it is configured to be connectable to a A system comprising the battery adapter, the battery pack, and the first electrical device body according to claim 2,
The first electrical equipment main body has a first main body side switching element configured to engage with the output side interface and set the voltage input from the battery adapter to the first voltage. cage,
When the battery pack is connected to the input-side interface and the first electric device body is connected to the output-side interface, the output-side interface engages with the first body-side switching element to A system comprising a first adapter-side switching element configured to output a voltage of unity. A system according to claim 3, wherein
A system according to claim 1, wherein said first body-side switching element has a parallel connection element for connecting said plurality of cell units in parallel. A system comprising the battery adapter, the battery pack, and the second electrical device main body according to claim 1 or 2,
The second electrical equipment main body has a second main body side switching element configured to engage with the output side interface and set the voltage input from the battery adapter to the second voltage. cage,
When the battery pack is connected to the input-side interface and the second electrical device body is connected to the output-side interface, the output-side interface engages with the second body-side switching element to 2. A system comprising a second adapter-side switching element configured to output 2 voltages. A system according to claim 5, wherein
A system according to claim 1, wherein said second main body side switching element has said series connection element for connecting said plurality of cell units in series with each other. A system comprising the battery adapter, the battery pack, and the second electrical device main body according to claim 1,
The output-side interface is unconnectable to a first electrical equipment main body whose suitable input voltage is the first voltage, and is configured to be connectable to the second electrical equipment main body. system.

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