CN104969408B - Battery bag and electrical equipment - Google Patents

Abstract

The present invention provides a kind of battery bag and electrical equipment.The 1st convex strip portions (87) and the 2nd convex strip portions (82) are provided with battery bag (88), the battery bag (88) includes：Battery pack, be connected in series with multiple batteries form and battery capacity be setting more than；Controller, the voltage of each battery of battery pack is monitored, alarm signal is exported when the voltage of at least any one battery is dropped to below a reference value；And instrument joint face (89), S terminals (80) formed with the plus end (73) for being electrically connected with power tool body and negative terminal (74) and alarm signal of the output from controller, 1st convex strip portions (87) are used to cause the power tool body that can not be installed up to the output voltage that rated voltage is less than battery pack, and the 2nd convex strip portions (82) are used to make it that the power tool body for being not provided with the terminal for inputting the alarm signal from the output of S terminals can not be installed up to.The battery bag of the present invention be by can not to unfavorable electric tool supply electric power in a manner of formed.

Description

Battery packs and electrical equipment

technical field

The invention relates to a battery pack and electric equipment using the battery pack as a power source.

Background technique

Electrical equipment without wires, such as power tools, lamps, and fans, which use battery packs as a power source, are widely used. A battery pack generally includes a battery pack in which a plurality of battery cells are connected, and the mainstream type of battery is a lithium-ion battery. In a battery pack using a lithium-ion battery, in order to monitor the battery temperature, current, and voltage of each battery cell that constitutes the battery pack, a monitoring mechanism such as a protection integrated circuit (Integrated Circuit, IC) or a microcomputer must be built in. The reason for this is that when any of the battery cells is short-circuited or the voltage of the battery cells reaches a threshold for overdischarging, an alarm signal is output from the monitoring means, and use of the battery pack is suspended in response to the alarm signal.

The Electrical Appliances and Materials Safety Act stipulates that the monitoring mechanism must be installed for each lithium-ion battery with a battery capacity exceeding 400AH/L. As far as power tools are concerned, batteries with a size of 18650 (diameter 18mm x height 65mm) are the mainstream. If converted by volume, lithium-ion batteries exceeding 1.83Ah per battery are restricted by the Electrical Appliances and Materials Safety Act. In the currently widely used 3Ah battery pack, two 1.5Ah battery cells are connected in parallel, and it is not restricted by the Electrical Appliances and Materials Safety Act. However, a 2.0Ah battery cell has recently been developed, and two such A 4Ah battery made of two battery cells connected in parallel. This 2.0Ah battery cell exceeds the standard defined in the Electrical Appliance and Material Safety Act, and therefore must satisfy the following two conditions defined in the Electrical Appliance and Material Safety Act.

(1) It must be designed so that there will be no temperature rise due to abnormal temperature or current management, or a current limiting device must be installed outside the battery pack.

(2) Assembly of a single battery to a battery pack

Each battery block must contain batteries with the same capacity and without polarity reversal. (That is, the overdischarge state must not be caused.)

In order to comply with the restrictions of the Electrical Appliances and Materials Safety Act, the electrical equipment premised on the use of the battery pack equipped with the monitoring mechanism is constructed in such a way that a field effect is provided on the current path from the battery pack to the electrical equipment. Transistors (Field Effect Transistor, FET) and other switching elements are turned off in response to an alarm signal output from a monitoring mechanism to forcibly stop using the battery pack (for example, refer to Patent Document 1).

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2008-62343

The problem to be solved by the invention

Some battery packs using battery cells with a capacity that is not subject to regulation by the Electrical Appliance and Material Safety Act do not have a monitoring mechanism built in; the electrical equipment body that uses the battery pack as a premise does not have a function to cut off the current. circuit switching elements. That is, the battery pack and the electric device main body are configured to be connected only by respective positive terminals and negative terminals. Therefore, if a battery pack with a battery cell and a monitoring mechanism inside it, which is restricted by the Electrical Appliance and Material Safety Act, is installed on the main body of such electrical equipment, the electrical equipment will be driven, but the alarm signal output from the monitoring mechanism cannot be transmitted to the main body of the electrical equipment. On the electrical equipment body side, therefore, the monitoring mechanism cannot realize the function. Therefore, as a result, it is impossible to comply with the restrictions of the Electrical Appliance and Material Safety Act.

To describe in detail, the high-capacity battery pack with a monitoring mechanism inside includes a terminal for outputting an output signal from the monitoring mechanism in addition to the two terminals drawn from the positive terminal and the negative terminal of the battery pack. . On the other hand, the main body of the electric device has a two-terminal structure for connecting to the positive terminal and the negative terminal of the battery pack, so it cannot receive an output signal from a monitoring mechanism built in the battery pack. In addition, the main body of the electrical equipment has a non-inductive structure for the output signal from the monitoring mechanism, so there is no cut-off mechanism such as a FET for cutting off the current path.

Contents of the invention

The present invention was made in view of the above circumstances, and an object of the present invention is to make it impossible to use a battery pack that is not suitable for the main body of the electrical equipment.

technical means to solve problems

In order to achieve the above object, if the battery pack according to the first invention is connected to the electrical equipment body, it will output the first rated voltage to the electrical equipment body. The mechanism allows connection to the first electrical equipment body corresponding to the first rated voltage and provided with a power cutoff mechanism for cutting off the power supplied from the battery pack, and the first connection restricting mechanism prohibits connection to the first electrical equipment body corresponding to the first rated voltage, and The second electrical equipment body not provided with a power cutoff mechanism.

According to the battery pack configured as described above, the battery pack is connected only to the electrical equipment provided with the power shutoff mechanism, and damage to the battery pack at the time of abnormality can be suppressed. According to the battery pack according to the first invention, the battery pack according to the second invention is characterized in that it includes a second connection restriction mechanism that allows connection to the first electric device corresponding to the first rated voltage and the first electric device corresponding to the first rated voltage. The second electrical equipment, wherein the second connection restricting mechanism prohibits connection to a third electrical equipment main body corresponding to a second rated voltage lower than the first rated voltage. It is possible to prevent the third electric device from being damaged by connecting the battery pack to the third electric device corresponding only to a small rated voltage.

According to the battery pack according to the first invention or the second invention, the battery pack according to the third invention is characterized in that the first identification means provided only in the second electric equipment is configured by the first connection restriction means. Reject and prohibit connection to the second electrical equipment.

According to the battery pack according to any one of the first invention to the third invention, the battery pack according to the fourth invention is characterized in that: for the second identification means provided only in the third electric equipment, The connection restriction mechanism rejects and prohibits connection to the third electric device.

According to the battery pack according to any one of the first to fourth inventions, the battery pack according to the fifth invention is characterized in that: the third identification means provided for all the first to third electric devices The connection of the battery pack to these electric devices is not rejected, and the first connection restricting means and the second connection restricting means pass through an area other than the area through which the third identification means passes.

It can be configured so that when a new type of battery pack is added later, a new third connection restriction mechanism is provided for the new type of battery pack, so that the new type of battery pack cannot be connected to the existing first electrical connection. Equipment to 3rd electrical equipment.

According to the battery pack according to any one of the first to fifth inventions, the battery pack according to the sixth invention is characterized in that: Part contacts with the convex parts corresponding to the first to third identification means and rejects, thereby prohibiting connection to electrical equipment.

The power cut-off mechanism provided in the electrical equipment according to the seventh invention is characterized in that it includes: an abnormal signal input terminal, and an abnormal signal for reporting abnormality is input from the battery pack according to any one of the first invention to the sixth invention; And the switch mechanism cuts off the power supply from the battery pack according to the abnormal signal input to the abnormal signal input terminal.

The battery pack according to the eighth invention is characterized by comprising: a battery pack formed by connecting a plurality of battery cells in series, and the battery capacity is above a specified value; a battery voltage monitoring mechanism monitors the voltage of each battery cell in the battery pack, and when When the voltage of at least one of the battery cells drops below the reference value, an alarm signal is output; the equipment connection part is formed with the positive terminal and negative terminal of the battery pack for electrical connection with the electrical equipment body and the output of the alarm signal from the battery voltage monitoring mechanism. Alarm signal output terminals; and electrical equipment bodies that do not allow the power supply mechanism to lower the rated voltage below the output voltage of the battery pack, and electrical equipment bodies that are not provided with terminals for inputting alarm signals output from the alarm signal output terminals Any one of them is an unsuitable electrical equipment main body, and is configured so that electric power cannot be supplied from the battery pack to the unsuitable electrical equipment main body.

In the existing battery packs, there are battery packs with the battery voltage monitoring mechanism and battery packs without the battery voltage monitoring mechanism, but because there are still legal requirements, the battery capacity is For battery packs with battery packs above the specified value, a battery voltage monitoring mechanism is installed to monitor the voltage of each battery cell in the battery pack, and an alarm is output from the battery voltage monitoring mechanism when the voltage of at least one of the battery cells drops below the reference value Signal. Here, the battery capacity equal to or greater than a predetermined value means a capacity greater than the battery capacity for which the battery voltage monitoring means may not be provided.

When the battery pack is attached to a power tool body with a rated voltage lower than the output voltage of the battery pack or a power tool body without a terminal for inputting an alarm signal output from the alarm signal output terminal to drive the power tool, the battery The voltage monitoring mechanism cannot fulfill its function. Therefore, it is configured such that electric power cannot be supplied from the battery pack to the electrical equipment main body.

According to the battery pack according to the eighth invention, the battery pack according to the ninth invention is characterized in that the impermissible power supply mechanism is configured so that an unsuitable electric device main body cannot be connected to the device connection part.

The battery pack described in the eighth invention cannot be connected to an unsuitable power tool body.

According to the battery pack according to the ninth invention, the battery pack according to the tenth invention is characterized in that the impermissible power supply mechanism includes a first protrusion arranged in parallel with any one of the positive terminal, the negative terminal, and the alarm signal output terminal. The shape of the first convex part is limited in such a way that the unsuitable power tool body whose rated voltage is lower than the output voltage of the battery pack cannot be connected to the equipment connection part, and the shape of the first convex part is not provided for input The shape of the second ridge portion is limited so that an unsuitable electric device main body of the terminal of the alarm signal output from the alarm signal output terminal cannot be connected to the device connection portion.

By making the shape of the tool connection portion of the battery pack unable to engage with the shape of the battery pack connection portion of the unsuitable electrical equipment body, the battery pack cannot be connected to the unsuitable electrical equipment body.

The effect of the invention

The battery pack of the present invention cannot be installed on a specific electrical equipment body that cannot realize the battery voltage monitoring function of the battery pack. Therefore, regarding electrical equipment that can be driven by the battery pack of the present invention, compliance with electrical appliance safety can be provided. Battery packs and electrical equipment that are restricted by the law and have a large battery capacity.

Description of drawings

FIG. 1 is an explanatory diagram showing whether a power tool body and a battery pack can be combined.

FIG. 2 is a schematic explanatory diagram showing a state where a battery pack having a voltage monitoring function for each battery is installed in a monitor-compatible electric tool body.

FIG. 3 is a schematic explanatory diagram showing a process of installing a battery pack having a voltage monitoring function for each battery in a monitoring non-compatible electric tool body.

4 is a schematic explanatory view showing a state in which a battery pack that does not have a voltage monitoring function for each battery is installed in a monitor-compatible electric tool body.

5 is a schematic explanatory diagram showing a state in which a battery pack that does not have a voltage monitoring function for each battery is installed in a monitoring non-compatible electric tool body.

Fig. 6 is a perspective view showing the battery pack connection surface of the 18V monitoring-compatible electric tool body.

7 is a perspective view showing the battery pack connection surface of the 18V monitoring non-compatible electric tool body.

8 is a perspective view showing a battery pack connection surface of a 14.4V monitoring-compatible electric tool body.

9 is a perspective view showing a battery pack connection surface of a 14.4V monitoring non-compatible electric tool body.

10 is a perspective view showing the appearance of a 14.4V output two-terminal structure battery pack in the embodiment of the present invention.

11 is a perspective view showing the appearance of a 14.4V output three-terminal structure battery pack in the embodiment of the present invention.

12 is a perspective view showing the appearance of an 18V output two-terminal structure battery pack in the embodiment of the present invention.

13 is a perspective view showing the appearance of the 18V output three-terminal structure battery pack in the embodiment of the present invention.

(a) to (h) of FIG. 14 are diagrams illustrating the shapes of the convex portion of the electric tool body and the notch portion of the battery pack.

Fig. 15 is an explanatory diagram (part 1) showing whether the electric tool main body and the battery pack can be mounted.

Fig. 16 is an explanatory diagram (Part 2) showing whether the electric tool main body and the battery pack can be mounted.

Fig. 17 is an explanatory diagram (Part 3) showing whether the electric tool main body and the battery pack can be mounted.

Fig. 18 is an explanatory diagram (Part 4) showing whether the electric tool main body and the battery pack can be mounted.

Fig. 19 is an explanatory diagram (part 5) showing whether the electric tool main body and the battery pack can be mounted.

Fig. 20 is an explanatory diagram (Part 6) showing whether the electric tool main body and the battery pack can be mounted.

Fig. 21 is an explanatory diagram (part 7) showing whether the electric tool main body and the battery pack can be mounted.

Fig. 22 is an explanatory diagram (part 8) showing whether the electric tool main body and the battery pack can be mounted.

Explanation of symbols

1, 50, 57, 60, 63: power tool body

2, 70, 78, 84, 88: battery pack

3: battery pack

10: trigger switch

20: Controller

30: Controller

40: motor

51: shell

52: Battery pack connection surface

53: Positive terminal

54: negative terminal

55: S terminal

56, 59, 62, 65: convex part

58, 61, 64: battery pack connection surface

59a, 62a, 65a: base

59c, 65c: Housing side extension

62b, 65b: Terminal side extension

71: Shell

72, 79, 85, 89: tool connection surface

73: Positive terminal

74: negative terminal

75: Terminal for charging

76, 81, 86, 90: Notches

77, 87: the first convex part

80: S terminal

82: The second convex part

83: groove part

Detailed ways

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, an electric tool is used as an example of electric equipment.

The condition of the battery pack of the present invention is that the battery capacity of the battery pack in which a plurality of battery cells are connected in series is equal to or greater than a predetermined value. In the example described below, the predetermined value of the battery capacity is 4 Ah. A high-capacity battery pack with a battery capacity of 4Ah or more has a high energy density. As mentioned above, a monitoring mechanism such as a protection IC needs to be installed in the battery pack. Hereinafter, as an example of a low-capacity battery pack, a battery pack with a capacity of 3 Ah is used, and as an example of a high-capacity battery pack, a battery pack with a capacity of 4 Ah is used. Moreover, there is no built-in monitoring mechanism in the 3Ah low-capacity battery pack. On the other hand, the high-capacity battery pack is provided with a monitoring mechanism and a terminal for outputting an output signal from the monitoring mechanism to a power tool body as an example of an electric device. Therefore, the high-capacity battery pack has a three-terminal structure having not only a positive terminal and a negative terminal for outputting battery voltage but also a terminal for outputting an output signal from a monitoring mechanism (hereinafter referred to as "S terminal"). On the other hand, the low-capacity battery pack described here has a two-terminal structure having only a positive terminal and a negative terminal.

Furthermore, battery packs can also be classified according to the number of batteries connected in series. In the following description, four battery blocks configured by connecting two batteries in parallel, and two batteries connected in parallel will be used. The connected five battery blocks are connected in series. The average voltage of the lithium-ion battery after charging and immediately before over-discharging is 3.6V. Therefore, the output voltage of 14.4V can be obtained from the battery pack of the former structure, and the output voltage of 18V can be obtained from the battery pack of the latter structure. The 14.4V output battery pack and the 18V output battery pack have a two-terminal structure type and a three-terminal structure type respectively. Therefore, in the following description, four kinds of battery packs, namely, 14.4V output two-terminal structure battery pack, 14.4V output three-terminal structure battery pack, 18V output two-terminal structure battery pack and 18V output three-terminal structure battery pack are taken as examples. illustrate.

The main body of the power tool equipped with a battery pack can be roughly divided into a type with a rated voltage of 14.4V and a type with a rated voltage of 18V, and each can be divided into a type that can respond to an alarm signal output from a monitoring mechanism built in the battery pack. types, and types that do not correspond to them. To describe in detail, in the electric tool body capable of responding to the alarm signal from the monitoring means, switching elements such as FETs are inserted in the discharge path inside the electric tool body. For example, an electric tool body capable of responding to an alarm signal is configured as follows, and has a three-terminal structure having a terminal connected to the positive terminal and the negative terminal of the battery pack, and a terminal for inputting an alarm signal. The switching element is turned off in response to an alarm signal output from a monitoring means in the installed battery pack because the battery voltage has reached a threshold value for becoming an overdischarged state. Here, the rated voltage of the electrical equipment refers to a voltage that does not impose an excessive load on the electrical equipment body even if it is continuously input to the electrical equipment body; the rated voltage of the battery pack refers to the voltage that the battery pack can continuously output. For example, when 14.4V is stated in an advertisement or an instruction manual of an electric tool, it is generally sold as a product in a state where a battery pack with a rated voltage of 14.4V is disposed on the main body of the electric tool with a rated voltage of 14.4V. The voltage thus expressed in advertisements or operating instructions can be regarded as the rated voltage of the electrical equipment body or battery pack.

Conversely, a power tool body that does not have a terminal for inputting an alarm signal and has a non-inductive structure for the alarm signal, in other words, does not have the FET, does not correspond to the alarm signal. In the following descriptions, four types of power tool bodies are used, namely, power tool bodies with a rated voltage of 14.4V and capable of responding to alarm signals (14.4V monitor-compatible power tool bodies), and rated voltages of 14.4V that are not compatible with alarm signals. The power tool body corresponding to the signal (14.4V monitoring non-corresponding power tool body), the rated voltage is 18V and can correspond to the alarm signal (18V monitoring corresponding power tool body), the rated voltage is 18V and is not compatible with the alarm signal The power tool body corresponding to the alarm signal (18V monitoring non-compatible power tool body).

According to the four kinds of battery packs and four kinds of electric tool bodies, there are sixteen kinds of combinations. FIG. 1 is an explanatory diagram showing whether a power tool body and a battery pack can be combined. In Fig. 1, the upper side corresponds to the power tool body side, and from the left corresponds to (a) 14.4V monitor compatible power tool body, (b) 14.4V monitor non-compatible power tool body, (c) 18V monitor compatible type Power tool body, (d) 18V monitoring non-compatible type power tool body. In addition, the lower side of Fig. 1 corresponds to the battery pack, corresponding to (e) 14.4V output two-terminal structure battery pack, (f) 14.4V output three-terminal structure battery pack, (g) 18V output two-terminal structure battery pack from the left Pack, (h) 18V output three-terminal structure battery pack. Moreover, in FIG. 1 , the combination of each power tool body and battery pack is represented by a solid line and a dotted line. Here, a solid line indicates that it can be combined, and a dashed line indicates that it cannot be combined.

As shown in Figure 1, it is forbidden to use a 14.4V output three-terminal structure battery pack in combination with a 14.4V monitoring non-corresponding power tool body (dotted line [12]). Monitor non-corresponding power tool body in combination (dotted line [16]). Moreover, although there will be no problem when using the battery pack of the 14.4V output system in the power tool body with a rated voltage of 18V (solid lines (4), (5), (6)), it must be impossible to do the opposite. The battery pack of the 18V output system is used in the power tool body having a rated voltage of 14.4V (dotted lines [10], [11], [14], [15]).

In the example described below, when the combination of the battery pack and the electric tool body is suitable, the tool connection surface of the battery pack is formed in such a way that the battery pack can be attached to the electric tool body, and the battery pack cannot be attached to an unattended A suitable form of the power tool body forms the tool connection surface of the battery pack. In this example, if the battery pack can be installed in the power tool body, the power tool can be used properly.

FIG. 2 is a diagram showing a state in which a battery pack 2 having a three-terminal structure and a monitor-compatible electric tool body 1 are installed. The electric tool body 1 is provided with a motor 40 and a controller 20 inside, and a switching element such as a FET 4 is inserted in a current path for passing current to the motor 40 . On the connection surface of the battery pack, not only positive and negative terminals but also an S terminal for inputting an alarm signal are formed. The S terminal on the side of the tool body 1 is a terminal for inputting an alarm signal output from the battery pack 2 when the voltage of at least one battery reaches a threshold value to be in an overdischarge state. The power tool body 1 is provided with a trigger switch 10 for driving the power tool.

In the battery pack 2, there is a battery pack 3 and a controller 30 as a battery voltage monitoring mechanism. The battery pack 3 is formed by connecting a plurality of batteries in series. The controller 30 monitors the voltage of each cell of the battery pack 3 , and output an alarm signal when the voltage of at least one battery cell drops below a reference value. When the battery pack 2 is mounted on the power tool body 1 , the positive terminals and the negative terminals are electrically connected to each other, and the S terminal of the battery pack 2 is also electrically connected to the S terminal of the tool body 1 . The S terminal on the side of the tool body 1 is connected to the controller 20 . As the controller 20, when an alarm signal is input from the S terminal of the battery pack 2, the FET4 is turned off to open the current path, and the use of the battery pack 2 is forcibly terminated.

When the combination of the power tool body 1 and the battery pack 2 shown in Fig. 2 is a 14.4V monitoring-compatible power tool body and a 14.4V output three-terminal battery pack, and an 18V monitoring-compatible power tool body and 18V output three-terminal When configuring the battery pack, it is not necessary to make it impossible to use the installed battery pack. However, in the case of a combination of a battery pack having an output voltage of 18V and a power tool body having a rated voltage of 14.4V, it must be made impossible to use the battery pack.

FIG. 3 is a diagram showing a process of attaching the battery pack 2 having a three-terminal structure to the main body 1 - a of the monitoring non-compliant electric tool while sliding. In the non-monitoring type electric tool main body 1-a, there is no terminal for connecting to the S terminal of the battery pack 2, and no FET is provided in the current path. Therefore, even if it is determined that at least one of the batteries in the battery pack 3 on the battery pack side has reached the state before overdischarge, the use of the battery pack cannot be forcibly terminated in accordance with the determination result. Therefore, in this combined electric tool, the battery pack 2 must not be attached to the electric tool main body 1-a.

FIG. 4 shows the state of the battery pack 2-a equipped with the two-terminal structure and the monitor-compatible electric tool body 1. As shown in FIG. Similar to the electric tool body 1 shown in FIG. 2 , a controller 20 and a FET 4 that is controlled to be turned on and off by the controller 20 and inserted into the current path are provided inside. If the rated voltage of the power tool body 1 is 18V, there will be no problem installing a battery pack with a 14.4V output or a battery pack with an 18V output. However, if the rated voltage of the power tool body 1 is 14.4V, it must be impossible to install a battery pack with an output of 18V as shown in FIG. 4 .

FIG. 5 shows the states of the battery pack 2-a equipped with the two-terminal structure and the monitoring non-compatible electric tool body 1-a. Similar to the electric tool body 1 shown in FIG. 2 , a controller 20 and a FET 4 that is controlled to be turned on and off by the controller 20 and inserted into the current path are provided inside. The output voltage of the two-terminal structure battery pack 2-a is 14.4V or 18V, but if it is 18V, it can only be installed on the body of an electric tool with a rated voltage of 18V, and for an electric tool with a rated voltage of 14.4V, it must This makes it impossible to install an 18V output two-terminal structure battery pack as shown in FIG. 5 .

Next, with reference to FIGS. 6 to 9 , the structure of the battery pack connection surface of the electric tool body will be described in more detail.

Fig. 6 is a perspective view showing the battery pack connection surface of the 18V monitoring-compatible electric tool body. FIG. 6 shows the state of the 18V monitoring-compatible electric tool body 50 seen from the bottom surface.

In the 18V monitoring type power tool main body 50, as shown in FIG. 6, a battery pack connection surface 52 for connecting to a battery pack is provided on the bottom surface of a housing 51. As shown in FIG. On the battery pack connection surface 52 , as shown in FIG. 6 , there are provided a positive terminal 53 , a negative terminal 54 , and an S terminal 55 which are connection terminals for electrically connecting to the battery pack. On the battery pack connection surface 52, a convex portion 56 is further protruded. The convex portion 56 corresponds to the third identification means and the convex portion of the present invention, and is formed at a predetermined position between the positive terminal 53 and the housing 51 with a predetermined width as shown in FIG. 6 .

Hereinafter, other power tool bodies will be described based on the 18V monitoring-compatible power tool body 50 ( FIG. 6 ). At this time, the same reference numerals are assigned to the same structures as those of the 18V monitoring-compatible electric tool body 50 , and detailed descriptions thereof will be omitted.

7 is a perspective view showing the battery pack connection surface of the 18V monitoring non-compatible electric tool body. The battery pack connection surface 58 of the 18V monitoring non-compatible electric tool body 57 is provided with a positive terminal 53 and a negative terminal 54 as shown in FIG. The S terminal 55 is not provided on the package connection surface 58 .

On the battery pack connection surface 58 , a protrusion 59 is further projected between the positive terminal 53 and the case 51 . Compared with the convex portion 56 ( FIG. 6 ) formed on the 18V monitor compatible electric tool body 50 , the convex portion 59 has a shape extending toward the case 51 side as shown in FIG. 7 .

8 is a perspective view showing a battery pack connection surface of a 14.4V monitoring-compatible electric tool body. As shown in FIG. 8 , a positive terminal 53 , a negative terminal 54 and an S terminal 55 are provided on the battery pack connection surface 61 of the 14.4V monitoring-compatible electric tool body 60 . Furthermore, on the battery pack connection surface 61 , a convex portion 62 is further projected between the positive terminal 53 and the case 51 . Compared with the convex portion 56 ( FIG. 6 ) formed on the 18V monitor compatible electric tool body 50 , the convex portion 62 has a shape extending toward the positive terminal 53 side as shown in FIG. 8 .

9 is a perspective view showing a battery pack connection surface of a 14.4V monitoring non-compatible electric tool body. As shown in FIG. 9 , the battery pack connection surface 64 of the 14.4V monitoring non-compatible electric tool body 63 has a positive terminal 53 and a negative terminal 54 . Like the 18V monitoring non-compliant electric tool body 57 ( FIG. 7 ), the 14.4V monitoring non-compliant electric tool body 63 is not provided with FET, and the S terminal 55 is not provided on the battery pack connection surface 64 . On the battery pack connection surface 64 , a convex portion 65 is further projected between the positive terminal 53 and the case 51 . Compared with the convex portion 56 ( FIG. 6 ) formed on the main body 50 of the 18V monitoring corresponding type electric tool, as shown in FIG. shape.

As described above, on the battery pack connection surface of the power tool body, protrusions having different shapes are formed depending on the rated voltage of the power tool body and the presence or absence of the S terminal of the power tool body.

Next, the configuration of the battery pack will be described with reference to FIGS. 10 to 13 .

10 is a perspective view showing the appearance of a 14.4V output two-terminal structure battery pack in the embodiment of the present invention. The 14.4V output two-terminal structure battery pack 70 is configured by accommodating a battery pack in which a plurality of battery cells, not shown, are connected in series inside a casing 71 . Furthermore, on the upper surface of the housing 71, as shown in FIG. 10, a tool connecting surface 72 for connecting to the electric tool body is formed.

The tool connecting surface 72 corresponds to the device connecting portion of the present invention, and as shown in FIG. The positive terminal 73 is a terminal connected to the positive side of the battery pack. When the battery pack is set to the electric tool body, the positive terminal 73 is inserted into the positive terminal 53 provided on the battery pack connection surface of the electric tool body, thereby realizing electrical connection. . The negative terminal 74 is a terminal connected to the negative side of the battery pack. When the battery pack is set to the electric tool body, the negative terminal 74 is inserted into the negative terminal 54 arranged on the battery pack connection surface of the electric tool body, thereby realizing electrical connection. . The charging terminal 75 is a terminal used when charging the battery pack accommodated in the battery pack. Furthermore, when the battery pack is attached to the main body of the monitor-compatible electric tool, the charging terminal 75 is inserted into the S terminal 55 provided on the battery pack connection surface of the electric tool main body.

On the tool connection surface 72 , as shown in FIG. 10 , a notch 76 is further formed between the positive terminal 73 and the housing 71 . The notch 76 corresponds to the disallowed power supply mechanism of the present invention. As shown in FIG. 10 , the notch 76 of the 14.4V output two-terminal structure battery pack 70 is provided with a first protruding line 77 . The first rib portion 77 is substantially parallel to the positive terminal 73 and is formed lower than the tool connection surface 72 before the notch.

Hereinafter, other battery packs will be described based on the 14.4V output two-terminal structure battery pack 70 ( FIG. 10 ). At this time, the same symbols are assigned to the same structures as those of the 14.4V output two-terminal structure battery pack 70 , and detailed descriptions thereof will be omitted.

11 is a perspective view showing the appearance of a 14.4V three-terminal structure battery pack in the embodiment of the present invention. The difference between the 14.4V output three-terminal structure battery pack 78 and the 14.4V output two-terminal structure battery pack 70 (FIG. 10) is that an S terminal 80 is provided instead of the charging terminal 75, and a second The convex part 82. The second convex portion 82 corresponds to the first connection restricting mechanism and convex portion of the present invention.

As shown in FIG. 11 , the tool connection surface 79 of the 14.4V output three-terminal structure battery pack 78 has a positive terminal 73 , a negative terminal 74 and an S terminal 80 . The S terminal 80 corresponds to an alarm signal output terminal in the present invention, and is a terminal for outputting an alarm signal from a battery voltage monitoring means (not shown). When the battery pack is installed on the monitor-compatible electric tool body, the S-terminal 80 is inserted into the S-terminal 55 provided on the connection surface of the battery pack of the electric tool body, so as to realize electrical connection. Furthermore, when charging the battery pack accommodated in the battery pack, the S terminal 80 is also used as a terminal for charging.

Moreover, as shown in FIG. 11 , in the notch 81 of the tool connection surface 79 of the 14.4V output three-terminal structure battery pack 78 , the first protruding part 77 and the second protruding part 77 are formed approximately parallel to each other with the groove part 83 interposed therebetween. Section 82. Here, the first rib portion 77 has the same shape as the first rib portion 77 ( FIG. 10 ) provided in the 14.4V output two-terminal structure battery pack 70 , and is formed at the same position.

The groove portion 83 is formed with a predetermined width between the first protruding line portion 77 and the second protruding line portion 82 . Here, the predetermined width means substantially the same width as the protrusion 56 ( FIG. 6 ) formed on the battery pack connection surface 52 of the 18V monitoring-compatible electric tool body 50 . Further, the groove portion 83 is formed at a position where the convex portion 56 is inserted when the battery pack 78 is connected to the 18V monitoring-compatible electric tool body 50 .

As shown in FIG. 11 , the second protruding portion 82 is formed between the first protruding portion 77 and the housing 71 , at a height above the notch 81 compared with the first protruding portion 77 , and as close as possible to the notch. The front tool connection surface 79 is at the same height.

12 is a perspective view showing the appearance of an 18V output two-terminal structure battery pack in the embodiment of the present invention. In the 18V output two-terminal structure battery pack 84 , the shape of the first protrusion 87 provided in the notch 86 is different from that of the 14.4V output two-terminal structure battery pack 70 in FIG. 10 . The first convex portion 87 corresponds to the second connection restricting mechanism and the convex portion of the present invention.

As shown in FIG. 12 , the tool connection surface 85 of the 18V output two-terminal structure battery pack 84 has a positive terminal 73 , a negative terminal 74 and a charging terminal 75 . Furthermore, as shown in FIG. 12 , the notch 86 of the tool connection surface 85 of the 18V output two-terminal structure battery pack 84 is provided with a first protrusion 87 . The first convex portion 87 is formed at the same position as the first convex portion 77 ( FIG. 10 ) provided in the 14.4V output two-terminal structure battery pack 70 , and is located in a gap compared with the first convex portion 77 The height above the portion 86 is as high as possible with the tool connection surface 85 before the notch.

13 is a perspective view showing the appearance of the 18V output three-terminal structure battery pack in the embodiment of the present invention. The difference between the 18V output three-terminal structure battery pack 88 and the 14.4V output two-terminal structure battery pack 70 in FIG. 87 and the second convex portion 82 are provided in the notch portion 90 .

As shown in FIG. 13 , the tool connection surface 89 of the 18V output three-terminal structure battery pack 88 has a positive terminal 73 , a negative terminal 74 and an S terminal 80 . Moreover, as shown in FIG. 13 , in the notch portion 90 of the tool connection surface 89 of the 18V output three-terminal structure battery pack 88 , the first protruding line portion 87 and the second protruding line are formed approximately parallel to each other with the groove portion 83 interposed therebetween. Section 82. The groove portion 83 is formed at the same position as the groove portion 83 ( FIG. 11 ) provided in the notch portion 81 of the 14.4V output three-terminal structure battery pack 78 with the same width. Furthermore, each of the first convex line portion 87 and the second convex line portion 82 is formed to have the same height as the tool connection surface 89 before the notch as much as possible. The shape and position of the first protruding part 87 are the same as the first protruding part 87 of the 18V output two-terminal structure battery pack 84 in FIG. The first rib portion 77 of the V output three-terminal structure battery pack 78 is the same.

As mentioned above, on the tool connection surface of the battery pack of the present embodiment, the first convex portion and the second convex portion are provided according to the output voltage of the battery cells accommodated in the battery pack and the presence or absence of the S terminal. .

Next, the shape of the convex portion of the electric tool body and the shapes of the first and second convex portions of the battery pack will be described in more detail with reference to (a) to (h) of FIG. 14 . (a) to (h) of FIG. 14 are diagrams illustrating the shapes of the convex portion of the electric tool body and the notch portion of the battery pack.

Fig. 14(a) to Fig. 14(d) show the shape of the convex portion provided on the battery pack connection surface of the electric tool body. (a) of FIG. 14 shows the shape of the protrusion 56 corresponding to the 18V monitoring-compatible electric tool body 50 (FIG. 6), and FIG. ) corresponding to the shape of the convex portion 59. 14(c) shows the shape of the convex portion 62 corresponding to the 14.4V monitoring-compatible electric tool body 60 (FIG. 8), and FIG. 14(d) shows the shape of the non-14.4V monitoring-compatible electric tool body. 63 ( FIG. 9 ) corresponds to the shape of the convex portion 65 .

In addition, in Fig. 14(a) to Fig. 14(d), the left side corresponds to the positive terminal 53 side of the electric tool body, and the right side corresponds to the housing 51 side.

As shown in (b) of FIG. 14 , the convex portion 59 provided on the 18V monitoring non-compliant electric tool body 57 includes a protrusion corresponding to the convex portion 56 ( FIG. 14 ( a )) provided on the 18V monitoring compatible electric tool body 50 . The base portion 59a and the case-side extension portion 59c extending toward the case 51 side. The base portion 59a corresponds to the third identifying means and the convex portion of the present invention, and the case-side extension portion 59c corresponds to the first identifying means and the convex portion of the present invention.

As shown in (c) of FIG. 14 , the convex portion 62 provided on the 14.4V monitoring-compatible electric tool body 60 includes a protrusion corresponding to the convex portion 56 ( FIG. 14 ( a )) provided on the 18V monitoring-compatible electric tool body 50 . The base portion 62a and the terminal-side extension portion 62b extending toward the positive terminal 53 side. The base part 62a corresponds to the 3rd identification means of this invention, and the terminal side extension part 62b corresponds to the 2nd identification means of this invention.

Moreover, as shown in (d) of FIG. 14 , the convex portion 65 provided on the 14.4V monitoring non-compatible type electric tool body 63 includes the convex portion 56 provided on the 18V monitoring corresponding type electric tool body 50 ((a of FIG. 14 ). )) corresponds to the base portion 65a, the terminal-side extension portion 65b extending toward the positive terminal 53 side, and the case-side extension portion 65c extending toward the case 51 side. The base part 65a corresponds to the 3rd identification means and convex part of this invention. Moreover, the terminal side extension part 65b corresponds to the 2nd identification means and convex part of this invention, and the case side extension part 65c corresponds to the 1st identification means and convex part of this invention.

As shown in (a) to (d) of FIG. 14, the electric tool body with a rated voltage as low as 14.4V is provided with a convex portion extending toward the positive terminal 53 ((c) of FIG. 14, (d) of FIG. 14 , and the non-monitoring electric tool body without FET etc. is provided with a convex portion extending toward the housing 51 side ( FIG. 14 ( b ), FIG. 14 ( d )) .

14( e ) to FIG. 14 ( h ) show the shapes of the first and second protrusions provided in the notch on the tool connection surface of the battery pack. (e) of FIG. 14 corresponds to a 14.4V output two-terminal structure battery pack 70, and FIG. 14(f) corresponds to a 14.4V output three-terminal structure battery pack 78. Moreover, (g) of FIG. 14 corresponds to the battery pack 84 with an 18V output two-terminal structure, and (h) of FIG. 14 corresponds to the battery pack 88 with an 18V output three-terminal structure.

In addition, in FIG. 14( e ) to FIG. 14( h ), the left side corresponds to the positive terminal 73 side of the battery pack, and the right side corresponds to the case 71 side. That is, the square shown on the left corresponds to the first convex portion, and the square shown on the right corresponds to the second convex portion. In addition, in the figure of a square shape, when the height of the tool connection surface is used as a reference, when the notch part is formed with the 1st convex part of the same height as a tool connection surface, a square is shown on the left side of a drawing. That is, only when the battery pack has a high first rib portion, a square shape is shown on the left side of the figure, but when the battery pack has a low first rib portion, a square shape is not shown on the left side of the figure. Moreover, when the notch part has the 2nd convex part with the same height as a tool connection surface, a square is shown on the right side of a figure.

For example, in the notch 76 of the 14.4V output two-terminal structure battery pack 70 shown in (e) of FIG. On the other hand, in the notch 90 of the 18V output three-terminal structure battery pack 88 shown in (h) of FIG. .

As shown in Figure 14 (e) to Figure 14 (h), a high first convex portion (Figure 14 (g), Figure 14 ( h)) In the cutout portion of the three-terminal structure battery pack having the S terminal 80, a second protrusion is provided (FIG. 14(f), FIG. 14(h)).

Next, referring to FIG. 15 to FIG. 22 , whether each power tool body and battery pack can be installed or not will be described.

As described above, in the notch of the tool connection surface of each battery pack, the first or second rib is provided at a predetermined position according to the output voltage of the battery pack or the presence or absence of the S terminal. Here, the groove portion 83 between the first convex portion and the second convex portion is a convex portion formed on the battery pack connection surface 52 of the 18V monitoring-compatible electric tool body 50 ( FIG. 6 ) with a corresponding width. 56 corresponds to the position. And, when the battery pack is mounted on the 18V monitoring-compatible electric tool body 50 , the convex portion 56 is inserted into the position of the groove portion 83 .

Fig. 15 is an explanatory diagram (Part 1) showing whether the electric tool and the battery pack can be mounted. FIG. 15 shows the connection part when the 14.4V output three-terminal structure battery pack 78 ( FIG. 11 ) is installed on the 18V monitoring-compatible electric tool body 50 ( FIG. 6 ). This is the combination of the solid line (6) shown in FIG. 1 .

When the 14.4V output three-terminal structure battery pack 78 is installed on the 18V monitoring-compatible power tool body 50, the tool connection surface 79 of the 14.4V output three-terminal structure battery pack 78 is opposite to the 18V monitoring-compatible power tool body 50. The battery pack connection surface 52 is inserted along the front and rear direction of the 18V monitoring-compatible electric tool body 50 . At this time, the convex part 56 of the 18V monitoring-compatible electric tool body 50 is inserted into the groove part 83 between the first protruding part 77 and the second protruding part 82 of the 14.4V output three-terminal structure battery pack 78 (Fig. 15). Moreover, the positive terminal 53 , negative terminal 54 and S terminal 55 of the 18V monitoring-compatible electric tool body 50 are respectively inserted into the positive terminal 73 , negative terminal 74 and S terminal 75 of a battery pack 78 with a three-terminal structure outputting 14.4V. Thus, the 18V monitoring-compatible electric tool body 50 is electrically connected to the 14.4V output three-terminal structure battery pack 78 , so that the 14.4V output three-terminal structure battery pack 78 can supply power to the 18V monitoring-compatible electric tool body 50 .

Similarly, FIG. 16 is an explanatory diagram (Part 2) showing whether the electric tool main body and the battery pack can be mounted. FIG. 16 shows the connection part when the 18V output three-terminal structure battery pack 88 ( FIG. 13 ) is installed on the 18V monitoring corresponding electric tool body 50 . This is the combination of the solid line (9) shown in FIG. 1 .

When installing the 18V output three-terminal structure battery pack 88 to the 18V monitoring-compatible electric tool body 50, the convex portion 56 of the 18V monitoring-compatible electric tool body 50 is inserted into the first 1st position of the 18V output three-terminal structure battery pack 88. The groove part 83 between the convex part 87 and the 2nd convex part 82 (FIG. 16). The 18V monitoring-compatible electric tool body 50 is electrically connected to the 18V output three-terminal structure battery pack 88 , so that the 18V output three-terminal structure battery pack 88 can supply power to the 18V monitoring-compatible electric tool body 50 .

As shown in FIG. 14( e ) to FIG. 14( h ), no protruding lines or the like are provided at positions corresponding to the grooves 83 in the notches of each battery pack. Therefore, any battery pack can be attached to the 18V monitoring-compatible electric tool body 50 ( FIG. 6 ), and can be electrically connected to the 18V monitoring-compatible electric tool body 50 to supply power.

On the other hand, the first rib portion of the battery pack is on the side of the positive terminal 73 of the groove portion 83 provided in the notch portion. It is located at a position corresponding to the terminal-side extension extending toward the positive terminal 53 side of the protrusion provided on the power tool body.

Here, in the battery pack having a low output voltage of 14.4V, as described above, the first rib portion is formed lower than the tool connection surface. When the low first rib portion 77 is provided in this way, when the battery pack is attached to the electric tool, the terminal-side extension portion of the convex portion is inserted above the low first rib portion.

Fig. 17 is an explanatory diagram (Part 3) showing whether the electric tool main body and the battery pack can be mounted. FIG. 17 shows the connection part when the 14.4V output three-terminal structure battery pack 78 ( FIG. 11 ) is installed on the 14.4V monitoring-compatible electric tool body 60 ( FIG. 8 ). This is the combination of the solid line (2) shown in FIG. 1 .

As shown in FIG. 11 and (f) of FIG. 14 , the 14.4V output three-terminal structure battery pack 78 has a first protruding line portion 77 and a second protruding line portion 82 which are low. Moreover, as shown in FIG. 8 and FIG. 14(c), the protrusion 62 of the 14.4V monitoring-compatible electric tool body 60 has a shape extending only to the positive terminal 53 side, and includes a base 62a and a terminal-side extension 62b.

When the 14.4V output three-terminal structure battery pack 78 is mounted on the 14.4V monitoring-compatible electric tool body 60 , the convex portion 62 is inserted between the tool connection surface 79 and the second convex portion 82 . At this time, the base portion 62a of the inserted convex portion 62 is positioned above the groove portion 83, and the terminal-side extension portion 62b is positioned above the first rib portion 77 (FIG. 17). Moreover, the positive terminal 53 , negative terminal 54 and S terminal 55 of the 14.4V monitoring-compatible electric tool body 60 are respectively inserted into the positive terminal 73 , negative terminal 74 and S terminal 75 of a battery pack 78 with a three-terminal structure for 14.4V output. Thus, the 14.4V monitoring-compatible electric tool body 60 and the 14.4V output three-terminal battery pack 78 are electrically connected, so that the 14.4V output three-terminal battery pack 78 can supply power to the 14.4V monitoring-compatible electric tool body 60 .

On the other hand, in a battery pack with a high output voltage of 18V, the first rib portion is formed at the same height as the tool connection surface. When the high first rib portion 87 is provided in this way, when the battery pack is attached to the electric tool body, the terminal-side extension of the convex portion of the electric tool body interferes with the first rib portion 87 .

Fig. 18 is an explanatory diagram (Part 4) showing whether the electric tool and the battery pack can be mounted. FIG. 18 shows the connection part when the 18V output three-terminal structure battery pack 88 ( FIG. 13 ) is installed on the 14.4V monitoring-compatible electric tool body 60 ( FIG. 8 ). This is the combination of the dotted line [10] shown in Figure 1.

As shown in FIG. 13 and (h) of FIG. 14 , the 18V output three-terminal structure battery pack 88 has a high first ridge portion 87 and a second ridge portion 82 .

When the 18V output three-terminal structure battery pack 88 is installed on the 14.4V monitoring-compatible electric tool body 60, as shown in FIG. 1 convex portion 87, so they interfere with each other. As a result, the 18V output three-terminal structure battery pack 88 cannot be installed in the 14.4V monitoring-compatible electric tool body 60 . Therefore, the 18V output three-terminal structure battery pack 88 is not suitable for the 14.4V monitoring-compatible power tool body 60 , and the 18V output three-terminal structure battery pack 88 cannot supply power to the unsuitable 14.4V monitoring-compatible power tool body 60 .

Here, the power tool body having a protrusion having a shape extending toward the terminal side is a power tool body with a rated voltage of 14.4V, and the battery pack having a high first convex portion is a battery pack having an output voltage of 18V. Therefore, the battery pack cannot be installed in the power tool body whose rated voltage is lower than the output voltage of the battery pack, and power cannot be supplied from the battery pack to the power tool body.

Furthermore, the second protruding line portion 82 is provided on the case 71 side of the groove portion 83 of the notch portion. It is located at a position corresponding to the case-side extension portion extending toward the case 51 side of the convex portion provided on the electric tool body.

Fig. 19 is an explanatory diagram (part 5) showing whether the electric tool main body and the battery pack can be mounted. FIG. 19 shows the connection part when the 14.4V output three-terminal structure battery pack 78 (FIG. 11) is installed on the 18V monitoring non-corresponding electric tool body 57 (FIG. 7). This is the combination of the dotted line [13] shown in Figure 1.

As shown in FIG. 11 and (f) of FIG. 14 , the 14.4V output three-terminal structure battery pack 78 has a first protruding portion 77 and a second protruding portion 82 . Furthermore, as shown in FIG. 7 and (b) of FIG. 14, the convex portion 59 of the 18V monitoring non-compatible electric tool body 57 has a shape extending only to the case 51 side, and includes a base portion 59a and a case-side extension portion 59c. .

When the 14.4V output three-terminal structure battery pack 78 is installed on the 18V monitoring non-compatible electric tool body 57, as shown in FIG. Interference, the 14.4V output three-terminal structure battery pack 78 cannot be installed. Therefore, a 14.4V output three-terminal structure battery pack 78 is not suitable for the 18V monitoring non-compatible power tool body 57, and the 14.4V output three-terminal structure battery pack 78 cannot supply power to the unsuitable 18V monitoring non-corresponding power tool body 57. .

Similarly, FIG. 20 is an explanatory diagram (Part 6) showing whether the electric tool main body and the battery pack can be mounted. FIG. 20 shows the connection part when the 14.4V output three-terminal structure battery pack 78 ( FIG. 11 ) is installed on the 14.4V monitoring non-corresponding electric tool body 63 ( FIG. 9 ). This is the combination of the dotted line [12] shown in Figure 1.

As shown in FIG. 9 and (d) of FIG. 14, the protrusion 65 of the 14.4V monitoring non-compatible electric tool body 63 has a shape extending to either the terminal 53 side or the housing 51 side, and includes a base 65a. , The terminal side extension part 65b and the housing side extension part 65c.

When the 14.4V output three-terminal structure battery pack 78 is installed on the 14.4V monitoring non-compatible electric tool body 63, as shown in FIG. Interference occurs, and the 14.4V output three-terminal structure battery pack 78 cannot be installed. Therefore, the 14.4V monitoring non-compatible power tool body 63 is not suitable to use the 14.4V output three-terminal structure battery pack 78, and the 14.4V output three-terminal structure battery pack 78 cannot be supplied to the unsuitable 14.4V monitoring non-corresponding power tool body 63 supply electricity.

Furthermore, FIG. 21 is an explanatory diagram (Part 7) showing whether the electric tool and the battery pack can be mounted. FIG. 21 shows the connection part when the 18V output three-terminal structure battery pack 88 ( FIG. 13 ) is installed on the 18V monitoring non-corresponding electric tool body 57 ( FIG. 7 ). This is the combination of the dotted line [16] shown in Figure 1.

As shown in FIG. 13 and (h) of FIG. 14 , the 18V output three-terminal structure battery pack 88 includes a high first ridge portion 87 and a second ridge portion 82 . Furthermore, as shown in FIG. 7 and (b) of FIG. 14, the convex portion 59 of the 18V monitoring non-compatible electric tool body 57 has a shape extending only to the case 51 side, and includes a base portion 59a and a case-side extension portion 59c. .

When the 18V output three-terminal structure battery pack 88 is mounted on the 18V monitoring non-compatible electric tool body 57, as shown in FIG. , the 18V output three-terminal structure battery pack 88 cannot be installed. Therefore, the 18V output three-terminal structure battery pack 88 is not suitable for the 18V monitoring non-compatible electric tool body 57 , and the 18V output three-terminal structure battery pack 88 cannot supply power to the unsuitable 18V monitoring non-compatible electric tool 57 .

Furthermore, FIG. 22 is an explanatory diagram (8) showing whether the electric tool and the battery pack can be mounted. FIG. 22 shows the connection part when the 18V output three-terminal structure battery pack 88 ( FIG. 13 ) is installed on the 14.4V monitoring non-corresponding electric tool body 63 ( FIG. 9 ). This is the combination of the dotted line [15] shown in Figure 1.

As shown in FIG. 9 and (d) of FIG. 14, the protrusion 65 of the 14.4V monitoring non-compatible electric tool body 63 has a shape extending to either the terminal 53 side or the housing 51 side, and includes a base 65a. , The terminal side extension part 65b and the housing side extension part 65c.

When the 18V output three-terminal structure battery pack 88 is installed on the 14.4V monitoring non-compatible electric tool body 63, as shown in FIG. Interference occurs, and the case-side extension portion 65 c interferes with the second protruding portion 82 , and the 18V output three-terminal structure battery pack 88 cannot be installed. Therefore, the 14.4V monitoring non-compatible power tool body 63 is not suitable for using the 18V output three-terminal structure battery pack 88, and the 18V output three-terminal structure battery pack 88 cannot supply power to the unsuitable 14.4V monitoring non-corresponding power tool body 63 .

Here, the one provided with the protrusion having a shape extending toward the housing side is a monitor non-compatible electric tool body without FETs, etc., and the one provided with the second convex portion is a battery pack with a three-terminal structure having an S terminal. Therefore, a battery pack with a three-terminal structure cannot be installed in the monitor non-compliant electric tool body, and power cannot be supplied from the battery pack to the electric tool body.

As described above, on the tool connection surface of the battery pack, the first and second ribs are provided according to the output voltage of the battery cells accommodated in the battery pack and the presence or absence of the S terminal, so that the battery pack cannot It is installed on the power tool body with a rated voltage lower than the output voltage, and the battery pack with a battery capacity above the specified value cannot be mounted on the power tool body without FETs, etc. Therefore, it is possible to prevent improper use of high-capacity battery packs.

The present invention is not limited to the examples described above, and it is also possible to prohibit the use of unsuitable battery packs and power tool bodies in other combinations.

Claims (10)

1. a kind of battery bag, the 1st rated voltage is exported to the electrical equipment body if electrical equipment body is connected to, it is described Battery bag is characterised by including：

1st connection limiting mechanism, allow to be connected to corresponding to the 1st rated voltage and supplied provided with cut-out from the battery bag 1st electrical equipment body of the power shut-off mechanism for the electric power given, and the 1st connection limiting mechanism is forbidden being connected to and corresponded to 1st rated voltage and it is not provided with the 2nd electrical equipment body of the power shut-off mechanism.

2. battery bag according to claim 1, it is characterised in that including：

2nd connection limiting mechanism, allows to be connected to the 1st electrical equipment body corresponding with the 1st rated voltage and institute The 2nd electrical equipment body is stated, and the 2nd connection limiting mechanism is forbidden being connected to and the 2nd volume less than the 1st rated voltage Determine the 3rd electrical equipment body corresponding to voltage.

3. battery bag according to claim 1 or 2, it is characterised in that：It is configured to, for only electrically being set located at the described 2nd 1st identification mechanism of standby body, refused electrically to set to forbid being connected to the described 2nd by the described 1st connection limiting mechanism Standby body.

4. battery bag according to claim 2, it is characterised in that：It is configured to, for being only located at the 3rd electrical equipment sheet 2nd identification mechanism of body, refused by the described 2nd connection limiting mechanism to forbid being connected to the 3rd electrical equipment sheet Body.

5. battery bag according to claim 2, it is characterised in that：In order to located at the described 1st to the 3rd electrical equipment sheet 3rd identification mechanism of whole electrical equipment bodies in body is not refused when battery bag is connected into these electrical equipment bodies Absolutely, it is configured to, the 1st connection limiting mechanism is connected limiting mechanism with the described 2nd and passed through by the 3rd identification mechanism Region beyond region.

6. battery bag according to claim 5, it is characterised in that：It is configured to, by making to limit equivalent to the described 1st connection The convex portion of mechanism and the 2nd connection limiting mechanism equivalent to the described 1st to the protrusions contact of the 3rd identification mechanism with being refused Absolutely, forbid being connected to the electrical equipment body.

A kind of 7. electrical equipment, it is characterised in that：The power shut-off mechanism includes：

Abnormal signal input terminal, have from the battery bag input according to any one of claim 1 to claim 6 and be used for Circulate a notice of abnormal abnormal signal；And

Switching mechanism, according to the abnormal signal of input to the abnormal signal input terminal, cut off the electricity from the battery bag Power supplies.

A kind of 8. battery bag, it is characterised in that including：

Battery pack, it is connected in series with multiple batteries and forms, and battery capacity is more than setting；

Cell voltage monitor control mechanism, the voltage of each battery of the battery pack is monitored, when the voltage of at least any one battery Alarm signal is exported when dropping to below a reference value；

Apparatus connecting unit, plus end, negative terminal formed with the battery pack for being electrically connected with electrical equipment body and defeated Out from the alarm signal lead-out terminal of the alarm signal of the cell voltage monitor control mechanism；And

Power supply mechanism is impermissible for, by electrical equipment body and not of the rated voltage less than the output voltage of the battery pack Any in electrical equipment body provided with the terminal for inputting the alarm signal from alarm signal lead-out terminal output It is individual to be used as unfavorable electrical equipment body, and be configured to can not be by the battery pack to unfavorable electrical equipment sheet Body supply electric power.

9. battery bag according to claim 8, it is characterised in that：The power supply mechanism that is impermissible for is configured to, and makes institute The apparatus connecting unit can not be connected to by stating unfavorable electrical equipment body.

10. battery bag according to claim 9, it is characterised in that：It is described be impermissible for power supply mechanism include with it is described The 1st convex strip portions and the 2nd that any one terminal in plus end, the negative terminal and the alarm signal lead-out terminal is set up in parallel Convex strip portions, and institute can not be connected to unfavorable electrical equipment body of the rated voltage less than the output voltage of the battery pack The mode for stating apparatus connecting unit limits the shape of the 1st convex strip portions, to be not provided with being used for inputting from the alarm signal exporting Unfavorable electrical equipment body of the terminal of the alarm signal of terminal output can not be connected to the mode of the apparatus connecting unit Limit the shape of the 2nd convex strip portions.