JP7272371B2 - electric equipment system - Google Patents

Description

TECHNICAL FIELD The present invention relates to an electrical equipment system including a battery pack having a control unit and an electrical equipment main body to which the battery pack can be connected.

Patent Literature 1 listed below discloses a charging system that charges a battery pack having a control unit (microcomputer) with a charging device.

JP 2014-72945 A

In Patent Literature 1, since the control unit of the battery pack is always activated, the power of the battery pack is wasted. Further, providing a dedicated terminal for activating the control unit of the battery pack increases the number of terminals, resulting in an increase in the size of the battery pack and the main body of the electrical equipment. Furthermore, in order to save the number of terminals, when the terminal for activating the battery pack controller has other functions, if the battery pack controller is unnecessarily activated for other functions, the battery pack may waste electricity.

The present invention has been made in recognition of such circumstances, and an object of the present invention is to provide an electrical equipment system capable of suppressing power consumption of a battery pack. Another object is to provide an electrical equipment system with a reduced number of terminals. Still another object is to provide an electric equipment system capable of suppressing an increase in power consumption of a battery pack while reducing the number of terminals.

One aspect of the present invention is an electrical equipment system. This electrical equipment system
a battery pack comprising a battery cell, a battery-side controller, and a battery-side signal terminal;
an electrical device main body that includes a device-side control unit and a device-side signal terminal connectable to the battery-side signal terminal, and is connectable to the battery pack;
An electrical equipment system comprising:
The device-side control unit has a first mode in which the battery-side control unit is not activated and a second mode in which the battery-side control unit is activated,
a switching circuit connected to the device-side signal terminal and capable of switching between the first mode and the second mode;
The electric device main body is configured to output a start signal for starting the battery-side control unit when the switching circuit switches to the second mode ,
The device-side control unit is configured to transmit the activation signal to the battery pack via the battery-side signal terminal and the device-side signal terminal,
The device-side control unit can acquire information, a state, or a signal indicating connection/disconnection of the battery pack via the battery-side signal terminal and the device-side signal terminal while the battery-side control unit is not activated. is .

Another aspect of the invention is an electrical equipment system. This electrical equipment system
a battery pack comprising a battery cell, a battery-side controller, and a battery-side signal terminal;
an electrical device main body that includes a device-side control unit and a device-side signal terminal connectable to the battery-side signal terminal, and is connectable to the battery pack;
An electrical equipment system comprising:
The device-side control unit has a first mode in which the battery-side control unit is not activated and a second mode in which the battery-side control unit is activated,
a switching circuit connected to the device-side signal terminal and capable of switching between the first mode and the second mode;
The electric device main body is configured to output a start signal for starting the battery-side control unit when the switching circuit switches to the second mode,
The battery pack includes a start-up circuit that receives a start-up signal and starts the battery-side control unit,
When the battery-side control unit is activated, the activation circuit maintains the driving state of the battery-side control unit according to a signal from the battery-side control unit.
The battery pack includes a battery-side notification terminal,
The electric device main body includes a device-side notification terminal connectable to the battery-side notification terminal,
The device-side control unit switches between the first mode and the second mode using the battery-side signal terminal and the device-side signal terminal, and uses the battery-side notification terminal and the device-side notification terminal. may be used to control the operation of the electrical equipment main body .

The first mode is a battery connection detection mode for detecting whether or not the battery pack is connected to the electrical device main body, and the second mode is a mode for detecting communication between the device-side control unit and the battery-side control unit. It may be a communication mode in which communication is performed between them.

Another aspect of the invention is an electrical equipment system. This electrical equipment system
An electric equipment system comprising: a battery pack including battery cells and a battery-side control unit; and an electric equipment main body including an equipment-side control unit and connectable to the battery pack,
The device-side control unit has a first mode in which the battery-side control unit is not activated and a second mode in which the battery-side control unit is activated,
The battery pack has a battery-side signal terminal,
The electrical device main body includes a device-side signal terminal connectable to the battery-side signal terminal,
a switching circuit connected to the device-side signal terminal and capable of switching between the first mode and the second mode;
The switching circuit includes first and second resistors having different resistance values, one end of which is connected to the device-side signal terminal, and a selection circuit that selects and connects one of the first and second resistors. have
The device-side control section switches selection of the first and second resistors by the selection circuit when switching the first and second modes by the switching circuit.

When the selection circuit selects the first resistor, the device-side signal terminal becomes a first level voltage at which the battery-side control unit does not start, and when the selection circuit selects the second resistor, the battery-side control unit It may be a second level voltage at which the unit activates.

The battery pack has a third resistor, one end of which is connected to the battery-side signal terminal and the other end of which is connected to a ground potential, depending on the state of connection between the first and second resistors and the third resistor. The voltage of the device-side signal terminal may be switched.

When the voltage of the device-side signal terminal is at the second level, the device-side control section may temporarily switch the voltage to the first level.

The electric device main body may be a charging device, and the device-side control unit may charge the battery pack in the second mode, and shift to the first mode when charging of the battery pack is completed. .

Another aspect of the invention is an electrical equipment system. This electrical equipment system
An electric equipment system comprising: a battery pack including battery cells and a battery-side control unit; and an electric equipment main body including an equipment-side control unit and connectable to the battery pack,
The device-side control unit has a first mode in which the battery-side control unit is not activated and a second mode in which the battery-side control unit is activated,
The device-side control unit temporarily switches to the first mode while charging the battery pack in the second mode.

The battery-side control unit may operate by receiving power supply from the battery cell.

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, the electric equipment system which can suppress the power consumption of a battery pack can be provided. In addition, it is possible to provide an electrical equipment system with a reduced number of terminals. Further, it is possible to provide an electrical equipment system capable of suppressing an increase in power consumption of the battery pack while reducing the number of terminals.

1 is a circuit block diagram of an electrical equipment system (charging system) 1 according to an embodiment of the present invention; FIG. 4 is a time chart showing an example of the operation of the electrical equipment system (charging system) 1; 4 is a flowchart of the overall operation of the electrical equipment system (charging system) 1; 4 is a flowchart of the operation of the charging device 10 in standby mode. 4 is a flowchart of the operation of the charging device 10 in a charging mode; 4 is a flowchart of the operation of the charging device 10 in a charging termination mode; 4 is a flowchart of the operation of the battery pack 50;

Preferred embodiments of the present invention will be described in detail below with reference to the drawings. The same or equivalent constituent elements, members, processes, etc. shown in each drawing are denoted by the same reference numerals, and redundant explanations 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.

FIG. 1 is a circuit block diagram of an electrical equipment system (charging system) 1 according to an embodiment of the present invention. An electrical equipment system (charging system) 1 includes a charging device 10 serving as an electrical equipment main body and a battery pack 50 . For connection with the battery pack 50, the charging device 10 includes a device-side positive terminal 21, a device-side D terminal 22 as a device-side signal terminal, a device-side LD terminal 23 as a device-side notification terminal, and a device-side and a negative terminal 24 . The battery pack 50 includes a battery-side positive terminal (charging positive terminal) 61, a battery-side D terminal 62 as a battery-side signal terminal, a battery-side LD terminal 63 as a battery-side notification terminal, and a battery-side negative terminal 64. and have Although not shown, the battery pack 50 may have a discharging positive terminal separate from the battery-side positive terminal 61 or may have a common terminal. The device-side positive terminal 21 and the battery-side positive terminal 61 are connected to each other. The device side D terminal 22 and the battery side D terminal 62 are connected to each other. The device-side LD terminal 23 and the battery-side LD terminal 63 are connected to each other. The device-side negative terminal 24 and the battery-side negative terminal 64 are connected to each other.

The charging device 10 includes a power supply circuit 11 , a controller (equipment-side controller) 13 , a communication circuit 15 , a switching circuit 17 , and a switch 19 . The power supply circuit 11 converts an AC voltage supplied from an external AC power supply 5 such as a commercial power supply to a DC voltage for charging the battery pack 50 and outputs the AC voltage to the device side positive terminal 21, and the AC voltage is used for control. DC voltage VDD2 and supplied to each circuit of the charging device 10. Control unit 13 controls the overall operation of charging device 10 . The communication circuit 15 is connected to the device-side D terminal 22 and transmits and receives communication signals to and from the communication circuit 57 of the battery pack 50 under the control of the control section 13 . The switch 19 is, for example, a relay, and is opened and closed under the control of the controller 13 . The charging device 10 has a resistor R5 in the charging current path. The control unit 13 detects the charging current from the voltage across the resistor R5. The control unit 13 detects the voltage of the battery pack 50 from the voltage of the device-side positive terminal 21 .

The switching circuit 17 has a first resistor R1, a second resistor R2, and a selection switch SW4 serving as a selection circuit. One ends of the first resistor R1 and the second resistor R2 are connected to the device side D terminal 22 . The other ends of the first resistor R1 and the second resistor R2 are connected to one end of the selection switch SW4. The other end of the selection switch SW4 is connected to the power supply line supplied with the power supply voltage VDD2. The resistance value of the first resistor R1 is greater than the resistance value of the second resistor R2. The selection switch SW4 switches which of the first resistor R1 and the second resistor R2 is connected to the power supply line under the control of the control unit 13 . The selection switch SW4 can be composed of a switching element such as an FET.

When the selection switch SW4 connects the first resistor R1 to the power supply line, the voltage of the device side D terminal 22 is a voltage level obtained by dividing the power supply voltage VDD2 by the first resistor R1 and the discrimination resistor R3 of the battery pack 50. , a voltage level (VD1 in FIG. 2) which is higher than the ground potential (0 V) but cannot turn on a switching element SW2 of the battery pack 50, which will be described later. When the selection switch SW4 connects the second resistor R2 to the power supply line, the voltage of the device side D terminal 22 is the voltage level obtained by dividing the power supply voltage VDD2 by the second resistor R2 and the discrimination resistor R3 of the battery pack 50. , the voltage level (VD2 in FIG. 2) at which the switching element SW2 of the battery pack 50 can be turned on.

In the connection detection mode as the first mode, the control unit 13 controls the selection switch SW4 to select the first resistor R1, and the battery pack 50 is connected by the voltage VD1 of the device side D terminal 22 at that time. This is detected, and information on the type of the battery pack 50 (rated voltage, number of connected cells, cell connection form, etc.) is acquired. In the communication mode as the second mode, the control unit 13 controls the selection switch SW4 to select the second resistor R2 and turns on the switch SW2 of the battery pack 50 . Then, as described later, the control unit 53 of the battery pack 50 is activated. After that, communication circuit 15 communicates with communication circuit 57 of battery pack 50 .

The battery pack 50 includes a power supply circuit 51 , a control section (battery side control section) 53 , a battery cell group 55 , a communication circuit 57 , a connection detection circuit 59 , a temperature detection element 67 , and a switching circuit 69 . have. The power supply circuit 51 converts the output voltage of the battery cell group 55 into a DC voltage VDD1 for control and supplies it to each circuit of the battery pack 50 . When the switch 19 of the charging device 10 is on, the power supply circuit 51 converts the output voltage of the power supply circuit 11 of the charging device 10 into a DC voltage VDD1 for control and supplies it to each circuit of the battery pack 50 . Control unit 53 controls the overall operation of battery pack 50 . The battery cell group 55 has a plurality of battery cells. The communication circuit 57 is connected to the battery-side D terminal 62 and transmits and receives communication signals to and from the communication circuit 15 of the charging device 10 under the control of the control section 53 . The connection detection circuit 59 is connected to the battery-side D terminal 62 and detects whether or not the connection of the charging device 10 or other electrical equipment is detected. The battery pack 50 has a discrimination resistor R3 between the battery side D terminal 62 and the ground. The determination resistor R3 is an example of an element for indicating information about the battery pack 50 and whether or not it is connected. The resistance value of the determination resistor R3 is a value according to the information of the battery pack 50 (rated voltage, number of connected cells, cell connection form, etc.).

The temperature detection element 67 is, for example, a thermistor, is arranged near the battery cell group 55 , and detects the temperature of the battery cell group 55 . Note that the temperature of one of the battery cells may be detected. The control unit 53 monitors the voltage of each cell in the battery cell group 55 . The controller 53 also monitors the temperature of the battery cell group 55 . The battery pack 50 has a resistor R4 on the discharge current path. The control unit 53 detects the discharge current from the voltage across the resistor R4. A switching circuit 69 serving as a starting circuit has switching elements SW1 to SW3 such as FETs and a resistor R6. The switching circuit 69 is a circuit that switches whether or not voltage is input from the battery cell group 55 to the power supply circuit 51 . By configuring the switching circuit 69 with an analog circuit separately from the control unit 53, an inexpensive control unit 53 can be used. When the voltage of the battery side D terminal 62 reaches a level at which the switching element SW2 can be turned on, the switching element SW2 is turned on, the switching element SW1 is turned on, and voltage is supplied from the battery cell group 55 to the power supply circuit 51 . When the selection switch SW4 in the charging device 10 selects the second resistor R2, a voltage VD2 (start signal) at a level capable of turning on the switching element SW2 is input from the battery-side D terminal 62 to the control terminal (gate) of the switching element SW2. The switching element SW2 is turned on. When voltage is supplied to the power supply circuit 51, the control unit 53 is activated. By turning on the switching element SW3, the control unit 53 can maintain the ON state of the switching element SW1 regardless of the state of the switching element SW2.

FIG. 2 is a time chart showing an example of the operation of the charging system 1. FIG. Before time t1, battery pack 50 is not connected to charging device 10, and controller 13 is in standby mode (FIG. 4) and connection detection mode. Since the device side D terminal 22 is open, the voltage of the device side D terminal 22 is pulled up by the first resistor R1 selected by the selection switch SW4 and is the power supply voltage VDD2. Since the battery side D terminal 62 is open, the voltage of the battery side D terminal 62 is pulled down by the discrimination resistor R3 and is at the ground potential. The power supply circuit 51 of the battery pack 50 is off because the voltage supply from the battery cell group 55 is cut off by the switching circuit 69 .

When battery pack 50 is connected to charging device 10 at time t1, controller 13 enters the charging mode (FIG. 5). Since the device side D terminal 22 and the battery side D terminal 62 are connected to each other, the voltage of the device side D terminal 22 and the battery side D terminal 62 is a voltage obtained by dividing the power supply voltage VDD2 by the first resistor R1 and the discrimination resistor R3. becomes VD1. When the voltage of the device-side D terminal 22 becomes VD1, the controller 13 detects that the battery pack 50 is connected to the charging device 10 at time t2 after a predetermined time has elapsed from time t1, and the connection detection mode is terminated. The mode is shifted to the communication mode, and the selection by the selection switch SW4 is switched from the first resistor R1 to the second resistor R2. Then, the voltages of the device-side D terminal 22 and the battery-side D terminal 62 become the voltage VD2 obtained by dividing the power supply voltage VDD2 by the second resistor R2 and the discrimination resistor R3. As a result, the switching element SW2 is turned on, and the power supply circuit 51 of the battery pack 50 is activated.

After time t2, charging voltage and charging current are supplied from the power supply circuit 11 of the charging device 10 to the battery cell group 55 of the battery pack 50, and charging of the battery pack 50 proceeds. During the charging period, communication is performed by the communication circuits 15 and 57, and the controller 13 intermittently shifts to the connection detection mode. In communication, the temperature of the battery cell group 55, the voltage of each cell, and the like are transmitted from the control unit 53 to the control unit 13. FIG. The reason why the control unit 13 intermittently (temporarily) shifts to the connection detection mode is to simply and reliably detect that the battery pack 50 is connected to the charging device 10 during charging. Control unit 13 may detect that battery pack 50 is connected through communication. However, in this case, for example, when communication is not possible, it is necessary to distinguish whether the communication is abnormal or the battery pack 50 has been removed. is more advantageous.

When the charging is completed at time t3, the controller 13 enters the charging end mode (FIG. 6) and the connection detection mode. The voltages of the device-side D terminal 22 and the battery-side D terminal 62 drop from VD2 to VD1 by switching the selection of the selection switch SW4 from the second resistor R2 to the first resistor R1. At time t4 when the power supply maintenance time has elapsed from time t3, the control unit 53 turns off the switching element SW3, and the power supply circuit 51 stops. When battery pack 50 is removed from charging device 10 at subsequent time t5, controller 13 shifts to standby mode (FIG. 4). Since the device side D terminal 22 is open, the voltage of the device side D terminal 22 becomes the power supply voltage VDD2. Since the battery-side D terminal 62 is open, the voltage of the battery-side D terminal 62 becomes the ground potential.

FIG. 3 is a flowchart of the overall operation of the electrical equipment system (charging system) 1. As shown in FIG. When the battery pack 50 is connected to the charging device 10 (YES in S1), the control unit 13 switches the selection by the selection switch SW4 from the first resistor R1 to the second resistor R2, and sets the device side D terminal 22 to the communication mode. Set (S3). Then, the power supply circuit 51 is activated, and the controller 53 is activated (S5). If the battery pack 50 is in a chargeable state (YES in S7), charging of the battery pack 50 by the charging device 10 is started and continued (S9). If the battery pack 50 is not in a chargeable state (NO in S7), charging is stopped (S11), the control unit 13 switches the selection by the selection switch SW4 from the second resistor R2 to the first resistor R1, and the device side The D terminal 22 is set to the connection detection mode (S13). After that, when a predetermined period of time has passed (YES in S15), the control unit 53 turns off the switching element SW3, stops the power supply circuit 51, and shuts down (S17). When the battery pack 50 is removed (NO in S19), the charging device 10 enters a standby state (S1).

FIG. 4 is a flowchart of the standby mode operation of charging device 10 . The control unit 13 selects the first resistor R1 by the selection switch SW4, and sets the device side D terminal 22 to the connection detection mode (S31). When the voltage of the device-side D terminal 22 becomes less than V1 (YES in S33), the controller 13 shifts to the charging mode. V1 is a predetermined value lower than the power supply voltage VDD2 and higher than the voltage VD1 obtained by dividing the power supply voltage VDD2 by the first resistor R1 and the discrimination resistor R3. When the battery pack 50 is connected to the charging device 10, the voltage of the device side D terminal 22 becomes less than V1.

FIG. 5 is a flowchart of the charging mode operation of charging device 10 . The control unit 13 selects the second resistor R2 by the selection switch SW4, and sets the device side D terminal 22 to the communication mode (S35). The control unit 13 transmits a battery state information request from the communication circuit 15 to the battery pack 50 (communication circuit 57) via the device side D terminal 22 and the battery side D terminal 62 (S37). When the communication circuit 15 receives the battery state information from the battery pack 50 (communication circuit 57) via the device side D terminal 22 and the battery side D terminal 62 (YES in S39), the control unit 13 changes the state of the battery pack 50 ( temperature, etc.) (YES in S41), the charging current is within a predetermined value or within a predetermined range (YES in S43), the voltage of the battery pack 50 is less than the full charge voltage V2 (YES in S45), and the device When the charging prohibition signal is not received from the battery pack 50 via the side LD terminal 23 and the battery side LD terminal 63 (YES in S47), charging of the battery pack 50 is started and continued (S49). The control unit 13 switches the selection by the selection switch SW4 to the first resistor R1 during charging, and sets the device side D terminal 22 to the connection detection mode (S51). If the voltage of the device-side D terminal 22 is less than V1 (YES in S52), the control unit 13 switches the selection by the selection switch SW4 to the second resistor R2, and returns to the communication mode (S35). When the voltage of the device-side D terminal 22 is V1 or higher (NO in S52), the control unit 13 determines that the battery pack 50 has been removed from the charging device 10, and shifts to standby mode (FIG. 4). If the control unit 13 does not receive the battery status information from the battery pack 50 for a predetermined period of time in step S39 (NO in S39, YES in S55), or if there is a problem with the status of the battery pack 50 (NO in S41), the charging current If it is not the predetermined value or within the predetermined range (NO in S43), if the voltage of the battery pack 50 is equal to or higher than the full charge voltage V2 (NO in S45), or if a charging prohibition signal is received from the battery pack 50 (NO in S47), The charging of the battery pack 50 is stopped (S57), and the charging end mode (FIG. 6) is entered.

FIG. 6 is a flow chart of operation of the charging end mode of the charging device 10 . The control unit 13 selects the first resistor R1 by the selection switch SW4, and sets the device side D terminal 22 to the connection detection mode (S59). When the voltage of the device side D terminal 22 becomes equal to or higher than V1 (NO in S61), the control section 13 determines that the battery pack 50 has been removed from the charging device 10, and shifts to standby mode (FIG. 4).

FIG. 7 is a flow chart of the operation of the battery pack 50. FIG. When activated, the control unit 53 outputs a signal to turn on the switching element SW3, and keeps the power supply circuit 51 in the driving state (S71). When the temperature of the battery cell group 55 is equal to or lower than the predetermined value (NO in S73) and the voltage of each battery cell is equal to or lower than the first predetermined value (NO in S75), the controller 53 outputs the charge permission signal to the battery side LD terminal. 63 (S77). In other words, the battery-side LD terminal 63 does not output the charging inhibition signal. If the temperature of the battery cell group 55 exceeds a predetermined value (YES in S73), or if the voltage of at least one battery cell exceeds a first predetermined value (YES in S75), the control unit 53 stops charging. An inhibition signal is output to the battery-side LD terminal 63 (S79). The voltage of the battery cell being equal to or less than the first predetermined value indicates that the battery cell is not overcharged, overvoltaged, or fully charged.

When the temperature of the battery cell group 55 is equal to or lower than a predetermined value (NO in S81), the voltage of each battery cell is equal to or higher than the second predetermined value (NO in S83), and the discharge current is equal to or lower than the predetermined value (NO in S85), a discharge enable signal is output to the battery side LD terminal 63 (S87). In other words, the discharge inhibit signal is not output to the battery-side LD terminal 63 . The control unit 53 determines whether the temperature of the battery cell group 55 exceeds a predetermined value (YES in S81), when the voltage of at least one battery cell is less than a second predetermined value (YES in S83), or when the discharge current is If the predetermined value is exceeded (YES in S85), a discharge inhibition signal is output to the battery-side LD terminal 63 (S89). Note that the voltage of the battery cell being equal to or higher than the second predetermined value indicates that the battery cell is not over-discharged.

When the control unit 53 receives the battery state information request from the charging device 10 (communication circuit 15) via the device side D terminal 22, the battery side D terminal 62, and the communication circuit 57 (YES in S91), the communication circuit 57 charges the battery. The battery status information is transmitted to the device 10 (communication circuit 15) through the battery side D terminal 62 and the device side D terminal 22 (S93).

If the voltage of the battery side D terminal 62 is less than V3 indicating that the device main body is connected (YES in S95), the controller 53 increments the timer T1 (S97). When the voltage of the battery-side D terminal 62 is V3 or more (NO in S95), the control unit 53 turns on the switching element SW3 to keep the power supply circuit 51 in the driving state (S99), and clears the timer T1 (S101). ). V3 is a predetermined value that is higher than the ground potential and lower than the voltage VD1 obtained by dividing the power supply voltage VDD2 by the first resistor R1 and the discrimination resistor R3. When the battery pack 50 is connected to the charging device 10, the voltage of the battery side D terminal 62 becomes V3 or higher. Specifically, it becomes VD1. If the timer T1 does not exceed the predetermined value (NO in S103), the controller 53 returns to step S73. When the timer T1 exceeds a predetermined value (YES in S103), that is, when the state in which the electric device main body is not connected to the battery pack 50 continues for a predetermined value (predetermined time), the control unit 53 switches the switching element SW3. is turned off and shut down (S105).

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

(1) Since the device-side D-terminal 22 and the battery-side D-terminal 62 are used as a start-up terminal, a communication terminal, and a connection detection terminal for the controller 53 of the battery pack 50, the number of terminals can be reduced.

(2) In the connection detection mode, the control unit 13 of the charging device 10 selects the first resistor R1 with the selection switch SW4 so that the switching element SW2 does not turn on the voltages of the device-side D terminal 22 and the battery-side D terminal 62. Since the level voltage is used, it is possible to detect the connection of the battery pack 50 without activating the control unit 53 of the battery pack 50 . In addition, it is possible to acquire information on the type of the battery pack 50 (rated voltage, number of connected cells, cell connection form, etc.) by the discrimination resistor R3 without activating the control unit 53 of the battery pack 50 . Therefore, unnecessary activation of the control unit 53 of the battery pack 50 can be suppressed, and an increase in power consumption of the battery pack 50 can be suppressed.

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.

The determination resistor R3 may be a thermistor provided near the battery cell group 55 . In this case, the control unit 13 of the charging device 10 can detect the temperature (state) of the battery cell group 55 without activating the control unit 53 of the battery pack 50 in the connection detection mode. The electric device main body is not limited to the charging device 10 exemplified in the embodiment, and may be of another type such as an electric power tool. In this case, a modification is possible in which the battery pack 50 is provided with a control unit that enhances added value such as for storage separately from the control unit 53, and unnecessary activation of the control unit is suppressed to suppress an increase in power consumption. is.

DESCRIPTION OF SYMBOLS 1... Electric equipment system (charging system), 10... Charging device, 11... Power supply circuit, 13... Control part (equipment side control part), 15... Communication circuit, 17... Switching circuit, 19... Switch, 21... Equipment side plus Terminals 22 Device side D terminal 23 Device side LD terminal 24 Device side negative terminal 50 Battery pack 51 Power supply circuit 53 Control section (battery side control section) 55 Battery cell group 57... Communication circuit 59... Connection detection circuit 61... Battery side positive terminal (charge positive terminal) 62... Battery side D terminal 63... Battery side LD terminal 64... Battery side negative terminal 67... Temperature detection element , 69... switching circuit

Claims (11)

a battery pack comprising a battery cell, a battery-side controller, and a battery-side signal terminal;
an electrical device main body that includes a device-side control unit and a device-side signal terminal connectable to the battery-side signal terminal, and is connectable to the battery pack;
An electrical equipment system comprising:
The device-side control unit has a first mode in which the battery-side control unit is not activated and a second mode in which the battery-side control unit is activated,
a switching circuit connected to the device-side signal terminal and capable of switching between the first mode and the second mode;
The electric device main body is configured to output a start signal for starting the battery-side control unit when the switching circuit switches to the second mode,
The device-side control unit is configured to transmit the activation signal to the battery pack via the battery-side signal terminal and the device-side signal terminal,
The device-side control unit can acquire information, a state, or a signal indicating connection/disconnection of the battery pack via the battery-side signal terminal and the device-side signal terminal while the battery-side control unit is not activated. , an electrical equipment system. a battery pack comprising a battery cell, a battery-side controller, and a battery-side signal terminal;
an electrical device main body that includes a device-side control unit and a device-side signal terminal connectable to the battery-side signal terminal, and is connectable to the battery pack;
An electrical equipment system comprising:
The device-side control unit has a first mode in which the battery-side control unit is not activated and a second mode in which the battery-side control unit is activated,
a switching circuit connected to the device-side signal terminal and capable of switching between the first mode and the second mode;
The electric device main body is configured to output a start signal for starting the battery-side control unit when the switching circuit switches to the second mode,
The battery pack includes a start-up circuit that receives a start-up signal and starts the battery-side control unit,
The electrical apparatus system according to claim 1, wherein the activation circuit maintains the driving state of the battery-side control unit according to a signal from the battery-side control unit when the battery-side control unit is activated. The battery pack includes a battery-side notification terminal,
The electric device main body includes a device-side notification terminal connectable to the battery-side notification terminal,
The device-side control unit switches between the first mode and the second mode using the battery-side signal terminal and the device-side signal terminal, and uses the battery-side notification terminal and the device-side notification terminal. to control the operation of the electrical equipment body,
The electrical equipment system according to claim 1 or 2 . the first mode is a battery connection detection mode for detecting whether or not the battery pack is connected to the electrical device body;
The electrical equipment system according to any one of claims 1 to 3, wherein said second mode is a communication mode in which communication is performed between said equipment-side control section and said battery-side control section. An electric equipment system comprising: a battery pack including battery cells and a battery-side control unit; and an electric equipment main body including an equipment-side control unit and connectable to the battery pack,
The device-side control unit has a first mode in which the battery-side control unit is not activated and a second mode in which the battery-side control unit is activated,
The battery pack has a battery-side signal terminal,
The electrical device main body includes a device-side signal terminal connectable to the battery-side signal terminal,
a switching circuit connected to the device-side signal terminal and capable of switching between the first mode and the second mode;
The switching circuit includes first and second resistors having different resistance values, one end of which is connected to the device-side signal terminal, and a selection circuit that selects and connects one of the first and second resistors. have
The electric device system, wherein the device-side control section switches between selection of the first and second resistors by the selection circuit when switching between the first and second modes by the switching circuit. When the selection circuit selects the first resistor, the device-side signal terminal becomes a first level voltage at which the battery-side control unit does not start, and when the selection circuit selects the second resistor, the battery-side control unit 6. The electrical equipment system of claim 5, wherein the second level of voltage causes the part to activate. the battery pack has a third resistor having one end connected to the battery-side signal terminal and the other end connected to a ground potential;
7. The electric device system according to claim 6, wherein the voltage of said device-side signal terminal is switched according to the connection state of said first and second resistors and said third resistor. 8. The electrical equipment system according to claim 6, wherein said equipment-side control unit temporarily switches the voltage of said equipment-side signal terminal to said voltage of said first level when said voltage of said equipment-side signal terminal is said second level. The electric device main body is a charging device,
9. The electricity according to any one of claims 1 to 8, wherein the device-side control unit charges the battery pack in the second mode, and shifts to the first mode when charging of the battery pack is completed. equipment system. An electric equipment system comprising: a battery pack including battery cells and a battery-side control unit; and an electric equipment main body including an equipment-side control unit and connectable to the battery pack,
The device-side control unit has a first mode in which the battery-side control unit is not activated and a second mode in which the battery-side control unit is activated,
The electric device system, wherein the device-side control unit temporarily switches to the first mode while the battery pack is being charged in the second mode. The electrical equipment system according to any one of claims 1 to 10, wherein said battery-side control unit operates by receiving power supply from said battery cell.

Images