KR102375510B1 - Battery Module, Battery Charging Device, and Vacuum Cleaner - Google Patents

Abstract

The battery module includes a battery unit for supplying power to home appliances, a battery unit sensing unit connected in parallel to the battery unit, detecting a state of the battery unit, and a battery unit controlling the battery unit sensing unit. includes units.
In addition, the battery module includes a battery unit transistor located between the battery unit and the battery unit control unit, and determining whether to supply power to the battery unit to the battery control unit based on an on or off operation, and the battery unit and a discharge prevention diode positioned between the battery unit transistors and configured to turn on or off the battery unit transistor by comparing the voltage of the battery unit and a reference voltage.

Description

Battery Module, Battery Charging Device, and Vacuum Cleaner

The present invention relates to a battery module, a charging device, and a vacuum cleaner.

BACKGROUND ART In general, a vacuum cleaner is a device that sucks air containing dust by using a suction force generated by a suction motor mounted inside a main body, and then filters the dust from the inside of the main body.

Such vacuum cleaners are divided into manual cleaners and automatic cleaners. A manual vacuum cleaner is a cleaner in which a user directly needs to clean, and an automatic cleaner is a cleaner that cleans while driving by itself.

The manual vacuum cleaner can be divided into a canister type in which the suction nozzle is provided separately from the main body and is connected by a connection pipe, and an upright type in which the suction nozzle is coupled to the main body.

With the development of battery technology, regardless of the type of vacuum cleaner, a cordless vacuum cleaner without a commercial power line, that is, an electric cord, has appeared. driven using

In order to respond to a user's command, the wireless cleaner may be supplied with battery power even in a standby state in which the wireless cleaner is not operated. Accordingly, there is a problem in that the battery power consumption is excessively generated.

In order to solve this problem, Korean Patent Laid-Open Publication No. 10-2015-0014754 (published date: February 09, 2015), which is a prior document, discloses a standby power saving method using a battery.

According to the prior art, a device includes a switched-mode power supply, a battery unit, and a microcomputer. Then, in the standby mode in which the device is not operated, the power of the switched mode power supply is cut off. Accordingly, standby power of the device is reduced.

In addition, the microcomputer of the device receives power from the battery in the standby mode. In addition, the microcomputer compares the output voltage of the switching mode power supply device and the voltage of the battery power with a predetermined reference voltage, and when the comparison result does not satisfy a preset condition, an alarm is displayed to inform the user when to replace the battery inform

Meanwhile, in the prior art, when the microcomputer continues to receive power from the battery, the battery may be discharged even though the device is in a non-operational state. When the battery is discharged for a long time, the voltage of the battery may be lower than a final discharging voltage set in the design process. Accordingly, the battery may be overdischarged. As the battery is overdischarged, damage to the electrode plate of the battery occurs to shorten the lifespan of the battery, or to make charging impossible. In addition, when the battery is overdischarged, there is a problem in that the risk of explosion of the battery increases. That is, as the battery is overdischarged, there is a problem in that user convenience and safety are deteriorated.

In order to solve the above problems, an object of the present invention is to provide a battery module, a charging device, and a vacuum cleaner capable of reducing the over-discharge phenomenon of the battery unit.

Another object of the present invention is to provide a battery module, a charging device, and a vacuum cleaner capable of varying the magnitude of the voltage discharged from the battery unit when a preset reference voltage is reached during the discharging of the battery unit. .

Another object of the present invention is to provide a charging device and a vacuum cleaner that allow the battery unit to be stably supplied with power to be charged by the charging device.

In order to achieve the above object, a battery module according to one aspect includes a battery unit for supplying power to home appliances, and a battery unit sensing unit connected in parallel to the battery unit and detecting a state of the battery unit. and a battery unit control unit for controlling the battery unit detecting unit.

In addition, the battery module includes a battery unit transistor located between the battery unit and the battery unit control unit, and determining whether to supply power to the battery unit to the battery control unit based on an on or off operation, and the battery unit and a discharge prevention diode positioned between the battery unit transistors and configured to turn on or off the battery unit transistor by comparing the voltage of the battery unit and a reference voltage.

When the voltage of the battery unit is greater than the reference voltage, the discharge prevention diode turns on the battery unit transistor to supply power of the battery unit to the battery unit control unit.

The discharge prevention diode turns off the battery unit transistor when the voltage of the battery unit is less than the reference voltage, so that the power supply of the battery unit to the battery unit control unit is cut off.

The anode terminal of the discharge prevention diode is connected to the gate terminal of the battery part transistor.

In addition, the cathode terminal of the discharge prevention diode is connected to the battery unit ground line.

In addition, the reference terminal of the discharge prevention diode is connected to the battery unit, and power of the battery unit is supplied to the reference terminal of the discharge prevention diode.

The battery module further includes a distribution resistor which is positioned between the discharge prevention diode and the battery unit and applies a voltage drop of the battery unit to a set ratio to a reference terminal of the discharge prevention diode.

The distribution resistor unit includes a first node of the battery unit connected to the reference terminal of the discharge prevention diode and a first distribution resistor of the discharge prevention diode located between the battery unit.

In addition, a second distribution resistor is included in the discharge prevention diode positioned between the first node and the battery unit ground line.

In addition, the power of the battery unit is voltage-dropped at a set ratio by the first and second division resistors, and is supplied to the reference terminal of the discharge prevention diode.

When the setting ratio of the division resistor unit is increased, the level of the reference voltage is decreased.

Also, when the setting ratio of the division resistor unit is decreased, the level of the reference voltage is increased.

A charging device according to another aspect includes a mounting unit for mounting a battery module; a mounting detection switch for detecting that the battery module is mounted on the mounting unit; and a charging unit management circuit for supplying power to the battery module when it is detected that the battery module is mounted on the mounting unit by the mounting detection switch.

In addition, the charging unit management circuit includes a power supply for supplying external power to the battery module mounted on the mounting unit.

And, the charging unit management circuit, when receiving power from the battery module or the power supply device, a charging device comprising a photo coupler that forms a potential difference between the positive electrode of the battery module and the charging unit ground line.

The mounting detection switch is located between the first node of the charging unit to which power of the battery unit or external power is supplied and the auxiliary electrode C0 connected to the battery module.

The charging unit management circuit further includes a blocking resistor positioned between the mounting detection switch and the charging unit auxiliary electrode (C0).

The photo coupler is connected in parallel with the blocking resistor and positioned between the auxiliary resistor connected to the first node of the charging unit and the charging unit ground line.

When the mounting detection switch is turned on and power is supplied to the photo coupler, a potential difference is formed between the charging unit first node and the charging unit ground line connected to the photo coupler.

The collector terminal and the emitter terminal of the photo coupler are respectively connected to one side and the other side of the blocking resistor.

And, the cathode terminal of the photo coupler is connected to the first node of the charging unit.

And, the anode terminal of the photo coupler is connected to the ground line of the charging unit.

The charge management circuit further includes a charging unit transistor positioned between the photo coupler and the charging unit ground line.

And, when power is supplied to the charger transistor through the photo coupler, the charger transistor is turned on to connect the photo coupler to the charger ground line.

The battery module includes a protection unit capable of connecting or disconnecting the ground electrode of the battery module and the ground electrode of the charging unit management circuit.

And, when a potential difference is formed between the first node of the charging unit and the charging unit ground line and power is supplied to the battery module, the protection unit is turned on and the ground electrode of the battery module and the ground electrode of the charging unit management circuit are connected to each other. .

A vacuum cleaner according to another aspect includes a body having a suction motor to generate a suction force, a suction unit communicating with the body, and a suction unit for sucking air and dust, and detachable to supply power to the suction motor It includes a battery module that can be securely mounted.

The battery module may include: a battery unit for supplying power to an electric product; a battery unit sensing unit connected in parallel to the battery unit and sensing a state of the battery unit; and a battery part control unit for controlling the battery part sensing unit.

In addition, the battery module includes a transistor connected between the battery cell and the battery unit detecting unit, and transmitting the power of the battery cell to the battery detecting unit when turned on.

In addition, a discharge prevention diode is connected between the battery cell and the suction motor to turn on or off the transistor based on a voltage supplied from the battery cell.

In another aspect, the vacuum cleaner of the present invention includes a main body having a suction motor and a mounting unit to generate a suction force, a suction unit communicating with the main body, and a suction unit for sucking air and dust, and supplying power to the suction motor In order to do this, it includes a battery module detachably mounted on the mounting unit, and a charging unit management circuit for supplying power to the battery module mounted on the mounting unit.

In addition, the charging unit management circuit includes a mounting detection switch for detecting that the battery module is mounted or detached from the mounting unit.

In addition, the charging unit management circuit includes a power supply for supplying power to the battery module when it is detected that the battery module is mounted in the mounting unit by the mounting detection switch.

In addition, the charging unit management circuit includes a photo coupler that forms a potential difference between the positive electrode of the battery module and the charging unit ground line when power is supplied from the battery module or the power supply device.

The battery module includes a battery unit for charging or discharging, a protection unit capable of connecting or disconnecting a ground electrode of the battery module and a ground electrode of the charging unit management circuit, and to control charging or discharging of the battery unit , and a battery unit control unit for controlling on or off driving of the protection unit.

And, when a potential difference is formed between the positive electrode of the battery module and the charging unit ground line by the photo coupler, the battery unit control unit receives power from the battery module or the power supply device to turn on the protection unit.

According to the present invention, it is possible to reduce the phenomenon of over-discharge of the battery unit, thereby securing a longer life expectancy of the battery unit, and there is an advantage in that the safety of the battery unit can be improved.

In addition, when the voltage of the battery unit becomes smaller than the preset reference voltage, the power of the battery unit supplied to the battery management circuit may be cut off by the discharge prevention diode provided in the battery management circuit. Accordingly, the battery unit is discharged in a no-load state. That is, when the battery unit reaches the reference voltage, there is an advantage in that the amount of discharge of the battery unit can be reduced.

In addition, the reference voltage of the battery unit may be set to various sizes by the division resistor unit. For example, the reference voltage may be set based on a usage purpose of the battery unit, a storage period, and the like. Accordingly, there is an advantage that various types of batteries can be provided to users.

In addition, for charging the battery unit, the battery module may be mounted in the charging device. At this time, a potential difference is generated between the positive electrode of the battery module and the charging unit ground line by a photo coupler provided in the charging device. Accordingly, even when the ground voltage of the battery module is unstable or the voltage of the battery unit reaches the reference voltage, the battery unit has an advantage that can be stably charged by the charging device.

1 is a perspective view of a charging device in which a battery module according to a first embodiment of the present invention is mounted.
2 is a block diagram of a charging device in which a battery module is mounted according to the first embodiment.
3 is a circuit diagram illustrating a battery module and a charging device in a state in which the battery module is separated from the charging device according to the first embodiment.
4 is a circuit diagram illustrating a battery module and a charging device in a state in which the battery module is mounted on the charging device according to the first embodiment.
5 is a flowchart illustrating a process in which a battery module is charged according to the first embodiment.
6 is a graph comparing the amount of discharge over time of the battery unit according to the embodiment and the prior art.
7 is a perspective view of a vacuum cleaner according to a second embodiment.
8 is a perspective view of a second body of the vacuum cleaner from which the battery module is separated according to the second embodiment.
9 is a block diagram of a battery module and a vacuum cleaner according to a second embodiment.
10 is a circuit diagram of a battery module and a vacuum cleaner in a state in which the battery module is separated according to the second embodiment.
11 is a circuit diagram of a battery module and a vacuum cleaner in a state in which the battery module is mounted according to the second embodiment.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same components are given the same reference numerals as much as possible even though they are indicated on different drawings. In addition, in describing the embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function interferes with the understanding of the embodiment of the present invention, the detailed description thereof will be omitted.

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, or order of the elements are not limited by the terms. When it is described that a component is "connected", "coupled" or "connected" to another component, the component may be directly connected or connected to the other component, but another component is between each component. It will be understood that may also be "connected", "coupled" or "connected".

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. However, the spirit of the present invention is not limited to the presented embodiments, and those skilled in the art who understand the spirit of the present invention will be able to easily suggest other embodiments within the scope of the same spirit.

1 is a perspective view of a charging device in which a battery module according to a first embodiment of the present invention is mounted.

Referring to FIG. 1 , the charging device 30 according to the first embodiment of the present invention may charge the battery module 10 for supplying power to home appliances. The home appliance may include, for example, a wireless vacuum cleaner, a robot cleaner, and the like that can receive power from a battery.

The battery module 10 may be detachably mounted to the home appliance. In addition, the battery module 10 may be separated from the home appliance and mounted on the charging device 30 . Accordingly, the battery module 10 may be charged by the charging device 30 .

The battery module 10 may include a battery unit housing 100 that forms an exterior.

The battery module 10 may supply power to home appliances and may include a battery unit 150 that may be charged with power by the charging device. The battery unit 150 may be provided inside the battery unit housing 100 . The battery unit 150 may be protected from external impact by the battery housing 100 .

The battery unit 150 may include a first battery cell ( 151 in FIG. 2 ) and a second battery ( 152 in FIG. 2 ). The battery cell may include, for example, a rechargeable secondary battery. The one or more battery cells may be connected in series or parallel depending on the capacity or the intended use.

The battery module 10 may include a battery management circuit (220 in FIG. 2 ) for detecting the state of the battery unit 150 and controlling charging or discharging of the battery unit 150 . The battery unit management circuit 200 may be provided inside the battery unit housing 100 . When the battery module 10 is connected to the charging device 30 , the battery management circuit 200 transmits information about the state of the battery unit 150 (hereinafter, state information) to the charging device 30 . can transmit

The battery module 10 may include a terminal unit (not shown) for electrically connecting to the home appliance or the charging device 30 . For example, when a home appliance is electrically connected to the terminal of the battery module 10 , the battery module 10 may supply power to the home appliance. As another example, when the charging device 30 is electrically connected to the terminal of the battery module 10 , the battery module 10 may receive power from the charging device 30 . Of course, in order for the battery module 10 to receive power from the charging device 30 , the charging device 30 may be in a state in which separate power is supplied from the outside.

Meanwhile, the charging device 30 may further include a mounting part 32 for mounting the battery module 10 . The mounting part 32 may be formed in a plate shape to be stably placed on the bottom surface. The battery module 10 may be seated on one surface of the mounting part 32 . For example, as shown in the drawing, the lower surface of the mounting part 32 may be in contact with the bottom surface. In addition, the battery module 10 may be seated on the upper surface of the mounting part 32 .

The charging device 30 may include a terminal part 34 for electrically connecting the battery module 10 . In detail, the terminal part 34 of the charging device 30 may be provided in the mounting part 32 . In addition, the terminal part 34 of the charging device 30 may be electrically connected to the terminal part of the battery module 10 . On the other hand, if the terminal of the battery module 10 has a recessed shape in order to secure the stability of coupling between the battery module 10 and the mounting part 32, the terminal part of the mounting part 32 is recessed in the battery module ( 10) may have a protruding shape to correspond to the terminal part. Conversely, if the terminal portion of the battery module 10 has a protruding shape, the terminal portion of the mounting portion 32 may have a recessed shape to correspond to the protruding terminal portion of the battery module 10 .

The charging device 30 may include a charging unit body 31 coupled to one side of the mounting unit 32 . As the mounting part 32 is coupled to one side of the charging part main body 31 , the charging device 30 may have an approximately 'L'-shaped external appearance.

A charging unit management circuit 300 for charging the battery module 10 seated in the mounting unit 32 may be provided inside the charging unit main body 31 . The charging unit management circuit 300 may include a sensing means for detecting the mounting of the battery module 10 . In addition, the charging unit management circuit 300 may include a power supply means for supplying power to the detected battery module (10).

The charging device 30 is disposed on one surface of the mounting part 32 and may further include a mounting detection switch 33 for detecting that the battery module 10 is mounted. The mounting sensing switch 33 may include, for example, a physical switch such as a micro switch and a push button switch. Alternatively, the mounting detection switch 33 may include an electronic switch such as an infrared sensor or a weight detection sensor.

The mounting detection switch 33 may be turned on when the battery module 10 is seated on the mounting unit 32 . Conversely, when the battery module 10 is separated from the mounting unit 32 , the mounting detection switch 33 may be turned off. When the mounting detection switch 33 is turned on, a discharge loop for discharging the battery unit 150 may be formed in the battery management circuit 200 of the battery module 10 . In other words, a closed circuit voltage may be measured in the battery unit 150 .

As the discharge loop is formed in the battery management circuit 200 , the battery management circuit 200 may receive power from the battery unit 150 . Accordingly, the battery management circuit 200 may detect the state of the battery unit 150 , and transmit the sensed information to the charging device 30 .

Meanwhile, in order to secure the lifespan and safety of the battery unit 150 , the battery management circuit 200 may block the formation of a discharge loop when the voltage of the battery unit 150 is less than or equal to a preset reference voltage. The reference voltage may be greater than a preset discharge final voltage to prevent a sudden drop in the voltage of the battery unit 150 . To this end, the battery management circuit 200 may further include a discharge prevention diode (240 in FIG. 2 ), which will be described later.

On the other hand, the discharging end voltage may mean an arbitrary voltage preset in order to prevent internal damage or a decrease in charging performance due to overdischarge of the battery. The discharging end voltage may be arbitrarily set by the user according to various factors such as the type and shape of the electrode plate built into the battery, the type of battery cell, and the use purpose.

2 is a block diagram of a charging device in which a battery module is mounted according to the first embodiment, and FIG. 3 is a circuit diagram showing the battery module and the charging device in a state in which the battery module is separated from the charging device according to the first embodiment.

2 and 3 , the battery module 10 may include a pair of electrodes B+ and B- representing both ends of the battery unit 150 . In addition, the battery module 10 may include a pair of electrodes P+ and P− provided at the terminal of the battery module 10 and representing both ends of the battery module 10 .

A pair of electrodes B+ and B- of the battery unit 150 may be electrically connected to a pair of electrodes P+ and P- of the battery module 10 . Accordingly, when the battery module 10 is mounted on the charging device 30 , the battery module 10 may be electrically connected to the charging device 30 .

On the other hand, the battery module 10 is a battery part auxiliary electrode ( P0) may be further included. When the positive electrode P+ of the battery module 10 and the auxiliary battery electrode P0 are connected to each other, a discharge loop for discharging the battery unit 150 may be formed in the battery management circuit 200 . there is. That is, when the battery module 10 is mounted on the charging device 30 , the positive electrode P+ of the battery module 10 and the auxiliary electrode P0 of the battery unit are connected to each other, and the battery unit 150 . A discharge loop of may be formed.

The battery unit management circuit 200 may further include a battery unit detecting unit 210 for detecting the state of the battery unit 150 . The battery unit sensing unit 210 includes a first battery unit sensing unit 211 connected in parallel to the first battery cell 151 and a second battery unit sensing unit connected in parallel to the second battery cell 152 . (212). The battery unit sensing unit 210 may include, for example, an analog front end (AFE). The battery unit detecting units 211 and 121 may detect at least one of a temperature, a voltage, and a current of each of the battery cells 151 and 152 .

The battery unit management circuit 200 may further include a battery control unit 220 for controlling the battery unit detecting unit 210 . The battery control unit 220 may receive information sensed by the battery unit detecting unit 210 . In detail, the first battery unit sensing unit 211 and the second battery unit sensing unit 212 may be connected to the battery unit control unit 220 . In this case, isolators 251 and 222 may be provided between the second battery unit sensing unit 212 and the battery unit control unit 220 . The isolators 251 and 252 may cause the battery unit sensing unit 212 connected in parallel to the second battery cell 152 to recognize the ground line connected to the first battery cell 151 as a separate ground line. there is. In other words, the isolators 251 and 252 may recognize that the ground electrode of the first battery cell 151 and the ground voltage of the second battery cell 152 are electrically cut off. Accordingly, even when the voltage is charged in the first battery cell 151 , the battery unit detecting unit 212 can more accurately detect the voltage of the second battery cell 152 .

Meanwhile, the information sensed by the battery unit detecting unit 212 may be transmitted to the charging unit control unit 340 of the charging device 30 . To this end, the battery control unit 220 may include a transmitter Tx and a receiver Rx connectable to the charger control unit 340 . And, when the battery module 10 is mounted on the charging device 30, the transmitter (Tx) and the receiver (Rx) of the battery part control unit 220 are the receiver (Tx) of the charging device control unit 340 to be described later ( Rx) and the transmitter Tx may be communicatively connected.

The battery unit management circuit 200 may further include a protection unit 260 for blocking overcharging and overdischarging of the battery unit 150 . The protection unit 260 may be connected between the battery control unit 220 and the battery unit 150 .

The protection unit 260 may include a charging device 261 and a discharging device 262 . In addition, the charging device 261 and the discharging device 262 may be respectively connected in parallel to the battery control unit 220 , and may be controlled to be turned on or off by the battery control unit 220 . The battery control unit 220 may switch control the protection unit 260 so that the battery unit 150 is not overcharged or overdischarged.

For example, the power of the battery unit 150 may be supplied to the battery control unit 220 . In this case, the battery control unit 220 may turn on the charging device 261 and the discharging device 262 of the protection unit 260 . Accordingly, the ground electrode P- of the battery management circuit 200 and the ground electrode C- of the charger management circuit 300 may be connected to each other. When the ground electrode (P-) of the battery unit management circuit 200 and the ground electrode (C-) of the charging unit management circuit 300 are connected to each other, the charging unit management circuit 300 activates the battery management circuit 200 ) can be supplied with power. Accordingly, the battery unit 150 may be charged by receiving power.

As another example, while the battery unit 150 is being charged, although the voltage of the battery unit 150 reaches the maximum charging voltage, charging may continue. In this case, the battery control unit 220 may control the battery unit 150 not to be overcharged by turning off the charging device 261 or the discharging device 262 of the protection unit 260 .

As another example, while the battery unit 150 is being discharged, the voltage of the battery unit 150 may reach a discharge end voltage. At this time, the battery unit control unit 220 may turn off the charging element 261 or the discharging element 262 of the protection unit 260 to control the battery unit 150 not to be overdischarged.

The charging device 261 and the discharging device 262 may include, for example, a Field Effect Transistor (FET).

The battery unit management circuit 200 is a first battery unit to which the voltage of the battery unit 150 is applied between the positive electrode B+ of the battery unit 150 and the positive electrode P+ of the battery module 10 . It may further include a node nb1. In addition, the battery unit management circuit 200 may further include a battery unit second node nb2 for supplying a voltage applied to the battery unit first node nb1 to a battery unit transistor 230 to be described later. .

The battery unit management circuit 200 may further include a battery unit transistor 230 that is turned on or off to determine whether to supply power to the battery unit 150 of the battery unit detection unit 210 .

The battery unit transistor 230 may include a source terminal (S), a drain terminal (D), and a gate terminal (G). The source terminal S of the battery unit transistor 230 may be connected to the battery unit second node nb2 . In addition, the drain terminal D of the battery unit transistor 230 may be connected to the battery unit sensing unit 210 . The battery unit transistor 230 may be turned on when the gate terminal G is 0 [V]. To this end, the battery unit management circuit 200 may further include a battery unit third node nb3 connecting the gate terminal G and the battery unit ground line. The battery part ground line may mean a conductor that electrically connects the ground electrode B- of the battery unit 150 and the ground electrode P- of the battery management circuit 200 .

On the other hand, in order to prevent the battery from being lower than a preset reference voltage, the battery unit management circuit 200 includes a discharge prevention diode 240 disposed between the battery unit third node nb3 and the battery unit ground line. may further include.

The discharge prevention diode 240 may include a cathode terminal (C) and an anode terminal (A). The cathode terminal C of the discharge prevention diode 240 may be connected to the third node nb3 of the battery unit. And, the anode terminal (A) of the discharge prevention diode 240 may be connected to the battery unit ground line. In addition, the reference terminal R of the discharge prevention diode 240 may be connected to a fourth node nb4 of the battery unit to be described later.

The battery unit management circuit 200 may include a battery unit fourth node nb4 for supplying the voltage of the battery unit 150 to the discharge prevention diode 240 . The battery unit auxiliary electrode P0 may be connected to the battery unit fourth node nb4. In addition, the discharge prevention diode 240 may be connected to the fourth node nb4 of the battery unit. Accordingly, the power of the battery unit 150 may be supplied to the discharge prevention diode 240 through the fourth node nb4 of the battery unit.

The discharge prevention diode 240, when the voltage of the battery unit 150 supplied to the discharge prevention diode 240 through the fourth node nb4 of the battery unit is greater than the reference voltage, the third battery unit The node nb3 may be electrically connected to the battery unit ground line. Accordingly, the battery unit transistor 230 may be turned on, and power may be supplied to the battery unit 150 through the battery unit detection circuit 200 .

The discharge prevention diode 240 may include, for example, a shunt diode, a Zenor diode, or the like.

Meanwhile, the battery unit management circuit 200 may further include a first distribution resistor unit 271 for operating the battery unit transistor 230 in an on/off switch mode. The first division resistor unit 271 may include a transistor first division resistor RT1 connected between the first node nb1 of the battery unit and the second node nb2 of the battery unit. In addition, the first distribution resistor unit 271 may further include a transistor second distribution resistor RT2 connected between the second node nb2 of the battery unit and the third node nb3 of the battery unit. In addition, the first distribution resistor unit 271 may further include a transistor third distribution resistor RT3 connected between the battery unit third node nb3 and the discharge prevention diode 240 . Meanwhile, when the discharge prevention diode 240 is turned on, one end of the third distribution resistor RT3 is connected to the third node nb3 of the battery unit, and the other end of the third distribution resistor RT3 is connected to the battery. It can be connected to the negative ground line. Accordingly, a voltage within an allowable range for operating in a switching mode may be applied to the battery transistor 230 .

The battery unit management circuit 200 may further include a second distribution resistor unit 272 for enabling the discharge prevention diode 240 to operate in an on/off switch mode. The second distribution resistor unit 272 may output the voltage of the battery unit 150 supplied to the discharge prevention diode 240 at a set ratio. In addition, a voltage output at a set ratio by the second division resistor unit 272 may be applied to the discharge prevention diode 240 . The second distribution resistor unit 272 may include a discharge prevention diode first distribution resistor Rd1 connected between the auxiliary electrode P0 of the battery unit and the fourth node nb4 of the battery unit. In addition, the second division resistor unit 272 may further include a discharge prevention diode second division resistor Rd2 connected between the battery unit fourth node nb4 and the battery unit ground line. Accordingly, a voltage within an allowable range for operation in a switch mode may be applied to the discharge prevention diode 240 .

It may be set based on a setting ratio set in the second distribution resistor unit 272 and a cutoff voltage Vcutoff that cuts off the discharge prevention diode 240 . The cut-off voltage may vary depending on the type of the discharge prevention diode 240 .

The setting ratio may be set by the first and second distribution resistors Rd1 and Rd2 of the discharge prevention diode constituting the second distribution resistor unit 272 . In addition, when the set ratio set by the second division resistor unit 272 increases, the reference voltage may decrease. Conversely, when the set ratio set by the second division resistor unit 272 decreases, the reference voltage may increase.

For example, when a voltage of 2.5 [V] to 36 [V] is applied to the reference terminal R of the discharge prevention diode 240 , the discharge prevention diode 240 may be turned on. In other words, when a voltage of 2.5 [V] to 36 [V] is applied to the reference terminal R, the cathode terminal C and the anode terminal A of the discharge prevention diode may be connected to each other. At this time, the cutoff voltage Vcutoff is 2.5 [V]. The user may preset the reference voltage of the discharge prevention diode 240 to 60 [V] by adjusting the resistance level of the second distribution resistor unit 272 .

That is, the magnitude of the resistance of at least one of the first distribution resistor Rd1 and the second distribution resistor Rd2 provided in the second distribution resistor unit 272 can be adjusted. And, when the voltage of the battery unit 150 is 60 [V], the voltage input to the discharge prevention diode 240 may be set to be 2.5 [V].

Accordingly, when the battery unit 150 is discharged and the voltage of the battery unit 150 is lower than the reference voltage of 60 [V], the discharge prevention diode 240 may be turned off. In other words, when the voltage of the battery unit 150 is less than 60 [V], the connection between the cathode terminal (C) and the anode terminal (A) of the discharge prevention diode 240 may be cut off. Accordingly, the battery unit transistor 230 may be turned off.

Since the reference voltage can be set by the second division resistor unit 272 , there is an advantage in that various types of batteries can be provided to users based on the purpose of use of the battery unit 150 , the storage period, and the like. Accordingly, there is an advantage in that not only the design easiness of the reference voltage of the battery unit but also the user's convenience can be secured.

On the other hand, when the voltage of the battery unit 150 becomes smaller than the set reference voltage and the battery unit transistor 230 is turned off, the power of the battery unit 150 is further supplied to the battery unit management circuit 200 . It may not be supplied any more. Accordingly, the power of the battery unit 150 supplied to the battery unit control unit 220 and the battery unit detection unit 210 may be cut off. That is, since the amount of voltage discharged by the battery unit 150 is reduced, there is an advantage in that the rate at which the battery unit 150 is discharged can be slowed down. In other words, only discharge when no load is applied to the battery unit 150 , that is, self-discharge occurs. For example, when the voltage of the battery unit 150 is 60 [V] or more, the power consumed by the battery unit 150 may be 140 [μA]. And, when the voltage of the battery unit 150 is less than 60 [V], the power consumed by the battery unit 150 may be 16 [μA].

The reference voltage may be greater than the discharge termination voltage. For example, when the reference voltage is 60 [V], the discharge termination voltage may be 30 [V]. Accordingly, even if the battery module 10 is left for a long time without being charged in a state in which the battery module 10 is mounted in the charging device 30 , it is possible to reduce the phenomenon that the battery unit 150 is overdischarged beyond the final discharge voltage.

In addition, as the overdischarge phenomenon is reduced, there is an advantage in that the lifespan of the battery unit 150 is secured.

In addition, it is possible to reduce the risk of explosion of the battery unit 150 due to overdischarge. Accordingly, there is an advantage in that the safety of the battery module 10 is improved.

Meanwhile, in the present specification, the “battery unit transistor” and the “discharge prevention diode” may be referred to as a “switch unit” in the sense of determining whether to supply power to the battery unit to the battery unit control unit.

The charging unit management circuit 300 may include a pair of electrodes C+ and C− representing both ends of the charging unit management circuit 300 . A pair of electrodes C+ and C- of the charging unit management circuit 300 may be provided in the terminal unit 34 of the charging device 30 . Accordingly, when the battery module 10 is mounted in the charging device 30 , the pair of electrodes C+ and C- of the charging unit management circuit 300 is the pair of electrodes (C+, C-) of the battery module 10 . P+, P-) may be electrically connected.

The charging unit management circuit 300 may further include a charging unit auxiliary electrode C0 connectable to the battery unit auxiliary electrode P0 of the battery unit management circuit 200 . When the battery module 10 is mounted in the charging device 30 , the battery part auxiliary electrode P0 of the battery management circuit 200 is connected to the charging part auxiliary electrode C0 of the charging device 30 . can

The charging unit management circuit 300 may further include a charging unit first node nc1 connected to the positive electrode C+ of the charging unit management circuit 300 . And, when the battery module 10 is mounted in the charging device 30, in order to form a discharge loop in the battery unit management circuit 200, the charging unit first node nc1 and the charging unit management circuit ( The mounting detection switch 33 may be provided between the auxiliary electrodes C0 of the charging unit 300 .

When the battery module 10 is mounted in the charging device 30 , the mounting detection switch 33 may be turned on. Accordingly, the positive electrode (C+) of the charging unit management circuit 300 and the charging unit auxiliary electrode (C0) are connected to each other, and the positive electrode (P+) of the battery module 10 is the positive electrode (C+) of the charging unit management circuit 300 ( C+), the charging unit auxiliary electrode C0 of the charging unit management circuit 300 , and the battery unit auxiliary electrode P0 of the battery module 10 may be electrically connected. Accordingly, a discharge loop may be formed in the battery module 10 .

Meanwhile, the charging unit management circuit 300 may further include a photo coupler 320 for supplying power to the battery module 10 mounted on the mounting unit 32 . The photo coupler 320 may be connected in parallel with a blocking resistor Rs provided between the mounting sensing switch 33 and the charging part auxiliary electrode C0. Also, the photo coupler 320 may be connected between the charging unit first node nc1 and the charging unit ground line.

The charging unit ground line may mean a conductor to which the ground electrode C- of the charging unit management circuit 300 is electrically connected to the ground ground.

In detail, the photo coupler 320 may include a collector terminal (Co) and an emitter terminal (E). The collector terminal Co and the emitter terminal E of the photo coupler 320 may be respectively connected to one side and the other side of the blocking resistor Rs.

In other words, the collector terminal Co of the photo coupler 320 may be connected to the mounting detection switch 33 . In addition, the emitter terminal E of the photo coupler 320 may be connected to the charging unit auxiliary electrode C0 of the charging unit management circuit 300 .

The photo coupler 320 may further include an anode terminal A and a cathode terminal Ca. The anode terminal A of the photo coupler 320 may be connected to the charging unit first node nc1 . In addition, the cathode terminal Ca of the photo coupler 320 may be connected to the charging unit ground line. On the other hand, in order to drive the photo coupler 320, a current within an allowable range flows between the anode terminal A of the photo coupler 320 and the charging unit first node nc1, and the charging unit first node An auxiliary resistor Rp for forming a potential difference between (nc1) and the ground line of the charging unit may be provided.

The charging unit management circuit 300 may further include a charging unit transistor 330 provided between the photo coupler 320 and the charging unit ground line. The drain terminal D of the charging part transistor 330 may be connected to the cathode terminal Ca of the photo coupler 320 . In addition, the source terminal S of the charging unit transistor 330 may be connected to the charging unit ground line. In addition, the gate terminal G of the charging unit transistor 330 may be connected to the charging unit control unit 340 . Accordingly, as the charger transistor 330 is turned on, the drain terminal D and the source terminal S of the charger transistor 330 may be connected to each other.

In summary, in order to charge the battery unit 150 , the battery module 10 may be mounted on the charging device 30 . In this case, a potential difference may be generated between the positive electrode P+ of the battery module 10 and the charging unit ground line by the photo coupler 320 provided in the charging unit management circuit 300 . Therefore, even when the ground voltage of the battery module 10 is greater than the voltage of the charging device 30 and the voltage of the battery unit 150 reaches the reference voltage, the battery unit 150 is connected to the charging device ( 30) has the advantage that charging can be performed stably.

Meanwhile, while the battery module 10 is mounted in the charging device 30 , a mounting signal may be input to the charging unit control unit 340 connected to the gate terminal G of the charging unit transistor 330 . By the mounting signal input to the charging unit control unit 340 , the charging unit control unit 340 may confirm that the battery module 10 is mounted on the mounting unit 32 . Accordingly, the charging unit control unit 340 may communicate with the battery unit control unit 220 to transmit/receive information.

The charging unit management circuit 300 may further include a power supply unit 360 that is a means for receiving power from the outside. The power supply unit 360 converts AC power supplied from the outside into DC power to supply power to the battery management circuit 200 and the charging control unit 340 . The power supply unit 360 may be located between the charging unit second node nb2 connected to the positive electrode C+ of the charging unit management circuit 300 and the charging unit ground line. Accordingly, the power supply unit 360 may supply power to the battery management circuit 200 and the charging unit control unit 340 .

The charging unit management circuit 300 may further include a conversion unit 350 for supplying the power supplied from the power supply unit 360 to the charging unit control unit 340 . The conversion unit 350 may be a DC-DC converter for converting the DC voltage converted from the power supply unit 360 into power for driving the charging unit control unit 340 . The conversion unit 350 may include, for example, a Switching Mode Power Supply (SMPS). The conversion unit 350 may be connected between the charging unit second node nc2 connected to the power supply unit 360 and the charging unit ground line. In addition, the conversion unit 350 may be connected to the charging unit control unit 340 . Accordingly, the conversion unit 350 may convert the power applied from the power supply unit 360 into power suitable for driving the charging unit control unit 340 , and then supply it to the charging unit control unit 340 .

4 is a circuit diagram showing a battery module and a charging device in a state in which the battery module is mounted on the charging device according to the first embodiment, and FIG. 5 is a flowchart showing a process of charging the battery module according to the first embodiment.

4 and 5 , when the battery module 10 is mounted on the mounting unit 32 of the charging device 30 , the mounting detection switch 33 may be turned on ( S1 ). At this time, the pair of electrodes (P+, P-) and the battery part auxiliary electrode (P0) of the battery module 10 are the pair of electrodes (C+, C-) of the charging device 30 and the charging part auxiliary electrode ( C0) can be connected to each. Meanwhile, as the mounting detection switch 33 is turned on, power of the battery unit 150 may be supplied to the photo coupler 320 .

The photo coupler 320 may be turned on by receiving power from the battery unit 150 (S3). When the photo coupler 320 is turned on, the charging part transistor 330 may be turned on. Also, as the charging transistor 330 is turned on, a potential difference is generated between the positive electrode P+ of the battery module 10 and the charging unit ground line. In addition, when the mounting detection switch 33 is turned on, the positive electrode (P+) of the battery module 10 is ) is electrically connected to the auxiliary electrode P0 of the battery part. Accordingly, the power of the battery unit 150 may be supplied to the fourth node nb4 of the battery unit. In this case, the voltage supplied to the fourth node nb4 may be the voltage of the battery unit 150 divided by the second resistor units Rd1 and Rd2 of the battery unit and dropped to a preset voltage level.

When the voltage of the battery unit 150 is greater than a preset reference voltage (S5), the discharge prevention diode 240 connected to the fourth node nb4 of the battery unit may be turned on (S7). And, as the discharge prevention diode 240 is turned on, the battery part transistor 230 may be turned on (S8).

In detail, when the discharge prevention diode 240 is turned on, the gate terminal G of the battery unit transistor 230 may be connected to the battery unit ground line. In this case, the power of the battery unit 150 may be supplied to the source terminal S of the battery unit transistor 230 . Accordingly, the driving condition of the battery unit transistor 230 is satisfied, and the battery unit transistor 230 may be turned on.

As the battery unit transistor 230 is turned on, power of the battery unit 150 may be supplied to the battery unit sensing unit 210 . In this case, the battery unit detection unit 210 may supply power to the battery unit control unit 220 . Accordingly, the battery control unit 220 may be turned on (S9).

The battery unit control unit 220 may turn on the charging element 261 and the discharging element 262 connected in parallel to the battery unit detecting unit 210 through the battery unit detecting unit 210 . Accordingly, the ground electrode P- of the battery module 10 may be connected to the ground electrode C- of the charging device 30 . Accordingly, when power from the battery management circuit 200 is supplied from the charging device 30 , the battery unit 150 may be charged. Meanwhile, the battery unit control unit 220 may check the state of the battery unit 150 through the battery unit detecting unit 210 .

External power may be supplied to the power supply unit 360 of the charging device 30 (S11). When external power is supplied to the power supply unit 360 of the charging device 30 , the power supply unit 360 may supply power to the battery unit 150 . Accordingly, the battery unit 150 may be charged. In addition, the power supply unit 360 may supply power to the conversion unit 350 . The conversion unit 350 may convert the voltage of the power supplied from the power supply unit 360 into a set voltage and then supply it to the charging unit control unit 340 . Accordingly, the charging unit control unit 340 may be operated.

When the charging unit control unit 340 is operated, the charging unit control unit 340 may receive battery status information from the battery unit control unit 220 . In addition, the charging unit control unit 340 may display the battery state information so that the user can visually check it. To this end, the charging device 30 may further include a separate display device (not shown) for the user to visually check the battery state information. The display device may include, for example, a light-emitting diode (LED), a liquid crystal display (LCD), a speaker, and the like.

Meanwhile, when external power is not supplied to the power supply unit 360 of the charging device 30 , the battery module 10 may be operated in a standby mode (S15). The standby mode may mean a control mode in which the state of the battery is managed by the battery control unit 220 receiving power from the battery unit 150 .

When the battery module 10 is operated in the standby mode, the power of the battery unit 150 may be continuously supplied to the battery control unit 220 . Accordingly, the battery unit 150 may be discharged.

Meanwhile, while the battery module 10 is operated in the standby mode, when the voltage of the battery unit 150 becomes smaller than the reference voltage (S5), the discharge prevention diode 240 may be turned off (S17). . As the discharge prevention diode 240 is turned off, the power of the battery unit 150 supplied to the battery unit control unit 220 may be cut off. That is, the discharge loop formed in the battery management circuit 200 may be blocked. Accordingly, the discharge amount of the battery unit 150 may be reduced. That is, only self-discharge may occur in the battery unit 150 .

On the other hand, when an abnormality occurs in the discharge prevention diode 240 , the discharge prevention diode 240 may not be turned off below the reference voltage. In this case, the battery unit control unit 220 senses the voltage of the battery unit 150 . In addition, when the detected voltage of the battery unit 150 is equal to or less than the final discharge voltage, the protection unit 260 may be controlled to cut off the power supply of the battery unit 150 .

In summary, the overdischarge of the battery unit 150 may be primarily prevented by the discharge prevention diode 240 , and the overdischarge of the battery unit 150 may be prevented secondary by the protection unit 260 . there is. Accordingly, there is an advantage in that overdischarge of the battery unit 150 can be more effectively reduced. Accordingly, there is an advantage in that the safety of the battery unit 150 is further improved.

6 is a graph comparing the amount of discharge over time of the battery unit according to the embodiment and the prior art.

4 to 6 , in the prior art, even when the voltage of the battery reaches a preset voltage, the power of the battery is continuously supplied to the microcomputer.

In contrast, in the present invention, the power supplied to the battery unit control unit 220 is cut off in the battery unit 150 by the discharge prevention diode 240 at the reference voltage. Accordingly, the battery unit 150 may perform self-discharge in which an amount of electricity is naturally dissipated. For example, when the voltage of the battery unit 150 is equal to or higher than the reference voltage of 60 [V], the current consumed by the battery unit 150 may be 140 uA. And when the voltage of the battery unit 150 is less than the reference voltage, the current consumed by the battery unit 150 may be 16uA. Accordingly, even if the battery unit 150 waits for a long time in the standby mode, the battery unit 150 performs only self-discharge after the reference voltage, thereby reducing the amount of discharge. In addition, since the amount of discharge is reduced, the time to reach the discharge termination voltage (30 [V] in the drawing) can be delayed more, so that the over-discharge phenomenon of the battery unit 150 can be reduced.

Meanwhile, in this specification, the reference voltage and the discharge termination voltage are set by the user. In this sense, the reference voltage may be referred to as a first set voltage. In addition, the discharge termination voltage may be referred to as a second set voltage.

According to the present embodiment, in order to reduce the over-discharge phenomenon of the battery unit 150 , the battery unit management circuit 200 is supplied with power to the battery unit control unit 220 of the battery unit 150 at a reference voltage or less. A discharge prevention diode is provided to block the When the discharge prevention diode 240 is turned on, the battery unit 150 may self-discharge. That is, the amount of discharge of the battery unit 150 may be reduced. Therefore, even if the battery unit 150 is not charged in the charging device 30 and left for a long time, there is an advantage in that the overdischarge phenomenon of the battery unit 150 can be reduced.

In addition, since the over-discharge phenomenon of the battery unit 150 is reduced, there is an advantage in that the life expectancy of the battery unit 150 can be secured longer.

In addition, there is an advantage of improving the safety of the battery unit 150 by delaying the time of overdischarge of the battery unit 150 .

In addition, the battery unit 150 may not be turned off due to an abnormal occurrence of the discharge prevention diode 240 . At this time, the battery unit control unit 220 senses the voltage of the battery unit 150 using the battery unit detecting unit 210 . And, when the detected voltage of the battery unit 150 is discharged exceeding the discharge end voltage, the battery unit control unit 220 controls the protection unit 260 to supply the voltage of the battery unit 150 . can be blocked. That is, in this embodiment, the first over-discharge preventing means for preventing over-discharge of the battery unit 150 is provided with the discharge prevention diode 240 , and the second over-discharging preventing means with the protection unit 260 is provided. . Accordingly, the over-discharge phenomenon of the battery unit 150 may be more effectively reduced, and as the over-discharge phenomenon is reduced, the safety of the battery unit 150 may be improved.

Also, in a state in which the voltage of the battery module 10 reaches a reference voltage, the battery module 10 may be mounted on the charging device 30 . At this time, in order to supply the power of the battery unit 150 to the battery management circuit 220 , the charging unit management circuit 300 is provided between the positive electrode P+ of the battery module 10 and the charging unit ground line. A photo coupler 320 to generate a potential difference is provided. Accordingly, even if the ground voltage of the battery module 10 is higher than the ground voltage of the charging device 30 , power of the battery unit 150 may be supplied to the battery management circuit 220 . Accordingly, the battery unit control unit 220 of the battery unit management circuit 220 may turn on the charging element 261 and the discharging element 262 of the protection unit 260 . Accordingly, the ground electrode of the battery management circuit 200 and the ground electrode of the charger management circuit 300 may be connected to each other. In addition, the battery unit 150 may be charged by receiving power from the charging device 30 .

Hereinafter, the second embodiment will be described.

Compared with the previous embodiment, the second embodiment will be mainly described with respect to parts with differences, and descriptions of the same parts as those of the previous embodiment will be omitted.

In addition, the second embodiment reveals in advance that there is a feature in the part that can be charged while the battery unit is mounted on the home appliance compared to the previous embodiment.

7 is a perspective view of a vacuum cleaner according to the second embodiment, and FIG. 8 is a perspective view of a second body of the vacuum cleaner from which the battery module according to the second embodiment is separated.

7 and 8 , the vacuum cleaner 5 according to the second embodiment includes a cleaner body 50 having a suction motor 510 for generating a suction force, and the cleaner body 50 to remove dust. It may further include a suction device 90 for guiding the included air.

The suction motor 510 may receive power by any one of a battery module 60 detachably mounted on the cleaner body 50 and power applied from the outside.

The suction device 90 may include a suction unit 91 for sucking dust on a cleaning surface, for example, a floor surface.

In addition, the suction device 90 may further include connection parts 92 , 93 , and 94 for connecting the suction part 91 to the cleaner body 50 .

The connection parts 92 , 93 , 94 include an extension pipe 94 connected to the suction part 91 , a handle 92 connected to the extension pipe 94 , and the handle 92 to the cleaner body 50 . ) may include a suction hose 93 connected to the.

In addition, the vacuum cleaner 5 includes a dust separation unit (not shown) for separating the air and dust sucked by the suction device 90 from each other, and a dust container 550 for storing the dust separated by the dust separation unit. may further include. The dust container 550 may be detachably mounted to the cleaner body 50 .

The vacuum cleaner 5 may include a controller (not shown) for controlling the operation of the suction motor 510,

In addition, the vacuum cleaner 5 may further include a battery module 60 for supplying power for operating the suction motor 510 .

In addition, the vacuum cleaner 5 is detachably connected to a charging unit 80 for charging the battery module 60 and the cleaner body 50, and supplies commercial power to the cleaner body 50. It may further include a power cord 95 for.

The power cord 95 may include a plug 96 connected to an outlet, and a cord connector 97 connected to the cleaner body 50 . In addition, the cleaner body 50 may further include a body connector 502 to which the cord connector 97 is connected.

The cleaner body 50 may include a first body 501 and a second body 503 coupled to a lower side of the first body 501 . Wheels 505 may be coupled to both sides of the second body 503 , respectively.

The suction motor 510 and the mounting part 80 may be provided on the second body 503 . In addition, the mounting part 80 may include a battery mounting space 81 in which the battery module 60 is detachably mounted.

Also, the mounting unit 80 may include a charging device 82 having a charging management circuit 800 for charging the mounted battery module 60 .

The battery module 10 mounted on the second body 503 may include a battery unit 650 including one or more battery cells. The battery unit 650 may be provided inside the battery housing 600 forming the exterior of the battery module 60 . Meanwhile, the battery cell provided in the battery unit 650 may be a rechargeable secondary battery.

The battery module 650 is provided inside the battery unit housing 600 and may further include a battery unit management circuit 700 for managing the battery unit 650 .

9 is a block diagram of the battery module and the vacuum cleaner according to the second embodiment, and FIG. 10 is a circuit diagram of the battery module and the vacuum cleaner in a state in which the battery module is separated according to the second embodiment.

9 and 10 , the battery module 60 may include a pair of electrodes B+ and B− representing both ends of the battery unit 650 . In addition, the battery module 60 may include a pair of electrodes P+ and P- representing both ends of the battery module 60 .

The pair of electrodes B+ and B- of the battery unit 650 may be electrically connected to the pair of electrodes P+ and P- of the battery module 60 . Accordingly, when the battery module 60 is mounted on the mounting part 80 of the vacuum cleaner 5 , the battery module 60 may be electrically connected to the vacuum cleaner 5 .

On the other hand, the battery module 60 is provided in the battery management circuit 700, and the positive electrode (P+) of the battery module 60 according to whether the mounting part 80 of the battery module 60 is mounted. It may further include an auxiliary electrode P0 of the battery unit for which connection is determined. When the positive electrode P+ of the battery module 60 and the auxiliary battery electrode P0 are connected to each other, a discharge loop for discharging the battery unit 650 may be formed in the battery management circuit 700 . there is.

In addition, the battery unit management circuit 700 may further include a battery unit detecting unit 710 for detecting the state of the battery unit 650 .

In addition, the battery unit management circuit 700 may further include a battery control unit 720 for controlling the battery unit detecting unit 710 .

In addition, the battery unit management circuit 700 may further include a protection unit 760 to block overcharging and overdischarging of the battery unit 650 . The protection unit 760 may be connected between the battery control unit 720 and the battery unit 750 .

The protection unit 760 may include a charging device 761 and a discharging device 762 . In addition, the charging device 761 and the discharging device 762 may be respectively connected in parallel to the battery control unit 720 , and may be controlled to be turned on or off by the battery control unit 720 .

The battery unit management circuit 700 is a first battery unit to which the voltage of the battery unit 750 is applied between the positive electrode B+ of the battery unit 650 and the positive electrode P+ of the battery module 10 . It may further include a node nb1. In addition, the battery unit management circuit 700 may further include a battery unit second node nb2 for supplying a voltage applied to the battery unit first node nb1 to a battery unit transistor 730 to be described later. .

The battery unit management circuit 700 may further include a battery unit transistor 730 that is turned on or off to determine whether to supply power to the battery unit 650 of the battery unit detection unit 710 .

The battery unit transistor 730 may include a source terminal (S), a drain terminal (D), and a gate terminal (G). The source terminal S of the battery unit transistor 730 may be connected to the battery unit second node nb2 . In addition, the drain terminal D of the battery part transistor 730 may be connected to the battery part sensing unit 710 . The battery unit management circuit 700 may further include a battery unit third node nb3 connecting the gate terminal G and the battery unit ground line to each other.

In addition, in order to prevent the battery from being lower than a preset reference voltage, the battery unit management circuit 700 includes a discharge prevention diode 740 disposed between the battery unit third node nb3 and the battery unit ground line. may further include.

In addition, the battery unit management circuit 700 may include a battery unit fourth node nb4 for supplying the voltage of the battery unit 150 to the discharge prevention diode 740 . The battery unit auxiliary electrode P0 may be connected to the battery unit fourth node nb4. In addition, the discharge prevention diode 740 may be connected to the fourth node nb4 of the battery unit. Accordingly, the power of the battery unit 650 may be supplied to the discharge prevention diode 740 through the fourth node nb4 of the battery unit.

When the voltage of the battery unit 650 supplied to the discharge prevention diode 740 through the fourth node nb4 of the battery unit 740 is greater than the reference voltage, the The node nb3 may be connected to the battery unit ground line. Accordingly, the battery unit transistor 730 may be turned on, and power may be supplied to the battery unit 650 through the battery unit detection circuit 700 .

In addition, the battery unit management circuit 700 may further include a first distribution resistor unit 771 for operating the battery unit transistor 730 in an on/off switch mode.

Also, the battery unit management circuit 700 may further include a second distribution resistor unit 772 for operating the discharge prevention diode 740 in an on/off switch mode. The second distribution resistor unit 772 may output the voltage of the battery unit 650 supplied to the discharge prevention diode 740 at a set ratio. Accordingly, a voltage within an allowable range for operation in a switch mode may be applied to the discharge prevention diode 740 .

In addition, the user may set the reference voltage for turning off the discharge prevention diode 740 by adjusting the size of each resistor constituting the second division resistor unit 772 .

Meanwhile, the charging device 82 may include a charging unit management circuit 800 for managing the battery module 60 and charging or discharging the battery module 60 .

The charging unit management circuit 800 may include a pair of electrodes C+ and C− representing both ends of the charging unit management circuit 800 . A pair of electrodes C+ and C- of the charging unit management circuit 800 may be provided in a terminal unit (not shown) of the charging device 82 . Accordingly, when the battery module 60 is mounted in the mounting part 80 , the pair of electrodes C+ and C- of the charging part management circuit 800 is the pair of electrodes P+ of the battery module 60 . , P-) can be electrically connected.

The charging unit management circuit 800 may further include a charging unit auxiliary electrode C0 connectable to the battery unit auxiliary electrode P0 of the battery unit management circuit 700 . When the battery module 10 is mounted on the mounting unit 80 , the battery unit auxiliary electrode P0 of the battery unit management circuit 700 is connected to the charging unit auxiliary electrode C0 of the charging unit management circuit 800 . can

The charging unit management circuit 800 may further include a charging unit first node nc1 connected to the positive electrode C+ of the charging unit management circuit 800 . In addition, when the battery module 60 is mounted in the mounting unit 80 , in order to form a discharge loop in the battery unit management circuit 700 , the charging unit first node nc1 and the charging unit management circuit 800 are ) between the auxiliary electrodes C0 of the charging part, the mounting detection switch 83 may be provided.

When the battery module 60 is mounted in the charging device 82 , the mounting detection switch 83 may be turned on. Accordingly, the positive electrode C+ of the charging unit management circuit 800 and the charging unit auxiliary electrode C0 are connected to each other, and the positive electrode P+ of the battery module 60 is the positive electrode (C+) of the charging unit management circuit 800. C+), the charging unit auxiliary electrode C0 of the charging unit management circuit 800 , and the battery unit auxiliary electrode P0 of the battery module 60 may be electrically connected. Accordingly, a discharge loop may be formed in the battery module 60 .

In addition, a photo coupler 820 for supplying power of the battery module 60 to the charging unit management circuit 800 may be further included. In addition, the photo coupler 820 may be connected in parallel with a blocking resistor Rs provided between the mounting sensing switch 83 and the charging part auxiliary electrode C0. Also, the photo coupler 820 may be positioned between the charging unit first node nc1 and the charging unit ground line.

In addition, the charging unit management circuit 800 may further include a charging unit transistor 830 provided between the photo coupler 820 and the charging unit ground line.

In order to charge the battery unit 650 , the battery module 60 may be mounted on the mounting unit 80 . In this case, a potential difference may be generated between the positive electrode P+ of the battery module 10 and the charging unit ground line by the photo coupler 820 provided in the charging unit management circuit 800 . Therefore, even when the ground voltage of the battery module 60 is greater than the ground voltage of the charging device 82 and the voltage of the battery unit 650 reaches the reference voltage, the battery unit 650 is the charging device There is an advantage that charging or discharging can be stably performed by (82).

Meanwhile, while the battery module 60 is mounted on the mounting unit 80 , a mounting signal may be input to the charging unit control unit 840 connected to the gate terminal G of the charging unit transistor 830 .

The charging unit management circuit 800 may further include a power supply unit 860 which is a means for receiving power from the outside. The power supply unit 860 may be connected between the charging unit second node nb2 connected to the positive electrode C+ of the mounting unit and the charging unit ground line. Also, the power supply unit 860 may be connected to the main body connector 502 . Accordingly, when the cord connector 97 of the power cord 95 is connected to the main body connector 502 , the power supply unit 860 supplies power to the battery management circuit 800 and the charging control unit 840 . can supply At this time, the plug 96 of the power cord 95 may be connected to an outlet, and may be in a state of receiving power from the outside.

The charging unit management circuit 800 may further include a conversion unit 850 for supplying the power supplied from the power supply unit 860 to at least one of the charging unit control unit 840 and the suction motor 510 . there is. The conversion unit 850 may be a DC-DC converter for converting the DC voltage converted from the power supply unit 860 into power for driving the charging unit control unit 840 . The conversion unit 850 may include, for example, a Switching Mode Power Supply (SMPS).

The conversion unit 850 may be connected between the charging unit second node nc2 connected to the power supply unit 860 and the charging unit ground line. In addition, the conversion unit 850 may be connected to the charging unit control unit 840 . Accordingly, the conversion unit 850 may convert the power applied from the power supply unit 860 into power suitable for driving the charging unit control unit 840 and then supply it to the charging unit control unit 840 .

Hereinafter, the operation will be described.

11 is a circuit diagram of a battery module and a vacuum cleaner in a state in which the battery module is mounted according to the second embodiment.

Referring to FIG. 11 , the battery module 60 may be mounted on the mounting part 80 . At this time, the mounting detection switch 83 provided in the charging device 82 may be turned on. And, the pair of electrodes (P+, P-) and the auxiliary electrode (P0) of the battery module (60) is the pair of electrodes (C+, C-) of the charging device (82) and the auxiliary electrode (C0) of the charging unit can be connected to each. In addition, as the mounting detection switch 83 is turned on, the power of the battery unit 650 may be supplied to the photo coupler 650 .

The photo coupler 820 may be turned on by receiving power from the battery unit 650 . When the photo coupler 820 is turned on, the charger transistor 830 may be turned on. Also, as the charger transistor 830 is turned on, a potential difference may occur between the positive electrode P+ of the battery module 60 and the charger ground line. In addition, when the mounting detection switch 83 is turned on, the positive electrode (P+) of the battery module 60, the positive electrode (C+) of the charging device 82, the ground electrode (C-), and the battery unit 650 ) is electrically connected to the auxiliary electrode P0 of the battery part. Accordingly, the power of the battery unit 650 may be supplied to the fourth node nb4 of the battery unit.

When the voltage of the battery unit 650 is greater than the reference voltage, the discharge prevention diode 740 connected to the fourth node nb4 of the battery unit may be turned on.

In addition, as the discharge prevention diode 740 is turned on, the battery part transistor 730 may be turned on.

As the battery part transistor 730 is turned on, the power of the battery unit 650 may be supplied to the battery part sensing unit 710 . In addition, the battery unit detection unit 710 may supply power to the battery unit control unit 720 . Accordingly, the battery control unit 720 may be turned on (S59). The battery unit control unit 720 may turn on the charging element 761 and the discharging element 762 connected in parallel to the battery unit sensing unit 710 through the battery unit detecting unit 710 . Accordingly, the ground electrode P- of the battery module 60 may be connected to the ground electrode C- of the charging device 82 .

External power may be supplied to the power supply unit 860 of the charging device 82 .

When external power is supplied to the power supply unit 860 of the charging device 80, the selection unit 870 may be turned on (S63). In detail, when an external power is applied to the selector switch 873 , a turn-on signal may be generated. In addition, the second selector transistor 872 and the selector first transistor 871 may be turned on by the generated turn-on signal.

The power supply unit 860 may supply power to the battery unit 650 . Accordingly, the battery unit 650 may be charged. In addition, the power supply unit 860 may supply power to the conversion unit 850 . The conversion unit 850 may convert the voltage of the power supplied from the power supply unit 860 into a set voltage and then supply it to the charging unit control unit 840 . Accordingly, the charging unit control unit 840 may be operated. When the charging unit control unit 840 is operated, the charging unit control unit 840 may receive battery status information from the battery unit control unit 820 .

Also, when external power is supplied to the power supply unit 860 of the charging device 80 , the battery unit 650 may be charged with power by the external power source.

On the other hand, when external power is not supplied to the power supply unit 860 , the battery management circuit 700 and the suction motor 510 of the vacuum cleaner 5 receive power by the battery unit 650 to operate can be That is, the battery unit 650 proceeds to discharge.

The battery unit 650 may be discharged until the voltage of the battery unit 650 becomes less than the reference voltage. In other words, the vacuum cleaner 5 may receive power from the battery unit 650 until the voltage of the battery unit 650 reaches a reference voltage.

When the voltage of the battery unit 650 is less than the reference voltage, when the voltage is less than the reference voltage, the discharge preventing diode 740 may be turned off. As the discharge prevention diode 740 is turned off, the power of the battery unit 550 supplied to the battery unit control unit 720 may be cut off. Also, as the discharge prevention diode 740 is turned off, the charging device 761 and the discharging device 762 of the protection unit 760 may also be turned off. Accordingly, the electrical connection between the ground electrode P- of the battery module and the ground electrode C- of the charging device 82 may be cut off. That is, the power of the battery unit 650 is no longer supplied to the suction motor 510 . Accordingly, the discharge amount of the battery unit 650 may be reduced. That is, only self-discharge may occur in the battery unit 650 .

In the present invention, the power supply unit (360, 860) has been described as the internal configuration of the charging unit management circuit (300, 800). However, the power supply units 360 and 860 may be provided as a separate configuration for converting commercial power into a voltage for charging the battery module and supplying it. The power supply units 360 and 860 may be, for example, a power adapter that connects a plug to which commercial power is supplied and a charging device or a vacuum cleaner to each other.

In the above, even though it has been described that all components constituting the embodiment of the present invention operate by being combined or combined into one, the present invention is not necessarily limited to this embodiment. That is, within the scope of the object of the present invention, all the components may operate by selectively combining one or more.

In addition, terms such as "comprises", "comprises" or "have" described above mean that the corresponding component may be inherent, unless otherwise specified, excluding other components. Rather, it should be construed as being able to further include other components. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless otherwise defined. Terms commonly used, such as those defined in the dictionary, should be construed as being consistent with the contextual meaning of the related art, and should not be construed in an ideal or excessively formal sense unless explicitly defined in the present invention.

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

Claims (16)

a battery unit for supplying power to home appliances;
a battery unit sensing unit connected in parallel to the battery unit and configured to detect a state of the battery unit;
a battery part control unit for controlling the battery part detecting unit;
a battery part transistor located between the battery unit and the battery part control unit, and determining whether to supply power to the battery part control unit to the battery part control unit based on an on or off operation; and
and a discharge prevention diode positioned between the battery unit and the battery unit transistor to turn on or off the battery unit transistor by comparing the voltage of the battery unit and a reference voltage,
The discharge prevention diode includes a plurality of terminals, and each terminal is connected to the battery part transistor, the battery part ground line, and the battery unit.
The method of claim 1,
The discharge prevention diode is
When the voltage of the battery unit is greater than the reference voltage, the battery unit transistor is turned on to supply power of the battery unit to the battery unit control unit. The method of claim 1,
The discharge prevention diode is
When the voltage of the battery unit is lower than the reference voltage, the battery unit transistor is turned off to cut off the power supply of the battery unit to the battery unit control unit. The method of claim 1,
The anode terminal of the discharge prevention diode is connected to the gate terminal of the battery part transistor,
The cathode terminal of the discharge prevention diode is connected to the battery unit ground line,
The reference terminal of the discharge prevention diode is connected to the battery unit, and the power of the battery unit is supplied to the reference terminal of the discharge prevention diode. 5. The method of claim 4,
The battery module further comprising: a distribution resistor positioned between the discharge prevention diode and the battery unit, the voltage drop of the battery unit at a set ratio, and applied to the reference terminal of the discharge prevention diode. 6. The method of claim 5,
The distribution resistor unit,
a first distribution resistor of the discharge prevention diode located between the battery unit and a first node of the battery unit connected to the reference terminal of the discharge prevention diode;
and a second distribution resistor of the discharge prevention diode positioned between the first node and the battery unit ground line,
The power of the battery unit is voltage-dropped at a set ratio by the first and second division resistors, and is supplied to the reference terminal of the discharge prevention diode. 6. The method of claim 5,
When the setting ratio of the distribution resistor unit increases, the magnitude of the reference voltage decreases,
The battery module, characterized in that when the setting ratio of the distribution resistor unit is reduced, the level of the reference voltage is increased. a mounting unit for mounting the battery module;
a mounting detection switch for detecting that the battery module is mounted on the mounting unit; and
and a charging unit management circuit for supplying power to the battery module when it is detected that the battery module is mounted on the mounting unit by the mounting detection switch,
The charging unit management circuit,
a power supply for supplying external power to the battery module mounted on the mounting unit;
and a photo coupler configured to form a potential difference between the positive electrode of the battery module and a ground line of the charging unit when power is supplied from the battery module or the power supply device. 9. The method of claim 8,
The mounting detection switch is
Charging device, characterized in that located between the first node of the charging unit to which power of the battery module or external power is supplied and the auxiliary electrode (C0) connected to the battery module. 10. The method of claim 9,
The charging unit management circuit,
Further comprising a blocking resistor positioned between the mounting sensing switch and the charging part auxiliary electrode (C0),
The photo coupler is connected in parallel with the blocking resistor and is located between the auxiliary resistor connected to the first node of the charging unit and the charging unit ground line,
When the mounting detection switch is turned on and power is supplied to the photo coupler, a potential difference is formed between the charging unit first node and the charging unit ground line connected to the photo coupler. 11. The method of claim 10,
The collector terminal and the emitter terminal of the photo coupler are respectively connected to one side and the other side of the blocking resistor,
The cathode terminal of the photo coupler is connected to the first node of the charging unit,
The anode terminal of the photo coupler is a charging device, characterized in that connected to the ground line of the charging unit. 9. The method of claim 8,
The charging unit management circuit,
Further comprising a charging unit transistor positioned between the photo coupler and the charging unit ground line,
When power is supplied to the charging unit transistor through the photo coupler, the charging unit transistor is turned on to connect the photo coupler to the charging unit ground line. 10. The method of claim 9,
The battery module is
and a protection unit capable of connecting or blocking the ground electrode of the battery module and the ground electrode of the charging unit management circuit,
When a potential difference is formed between the first node of the charging unit and the charging unit ground line and power is supplied to the battery module, the protection unit is turned on, and the ground electrode of the battery module and the ground electrode of the charging unit management circuit are connected to each other Charging device featuring a body having a suction motor to generate a suction force;
a suction unit communicating with the body and for sucking air and dust; and
and a battery module that can be detachably mounted to supply power to the suction motor,
The battery module is
a battery unit for supplying power to electrical appliances;
a battery unit sensing unit connected in parallel to the battery unit and configured to detect a state of the battery unit;
a battery part control unit for controlling the battery part detecting unit;
a battery part transistor connected between the battery unit and the battery part detecting unit, and transmitting power of the battery unit to the battery part detecting unit when turned on;
and a discharge prevention diode connected between the battery unit and the suction motor to turn on or off the battery unit transistor based on a voltage supplied from the battery unit,
The discharge prevention diode includes a plurality of terminals, and each terminal is connected to the battery part transistor, the battery part ground line, and the battery unit. a body having a suction motor and a mounting part to generate a suction force;
a suction unit communicating with the body and for sucking air and dust;
a battery module detachably mounted to the mounting unit to supply power to the suction motor; and
and a charging unit management circuit for supplying power to the battery module mounted on the mounting unit,
The charging unit management circuit,
a mounting detection switch for detecting that the battery module is mounted or detached from the mounting unit;
a power supply device for supplying power to the battery module when it is detected that the battery module is mounted in the mounting unit by the mounting detection switch;
and a photo coupler configured to form a potential difference between the positive electrode of the battery module and a ground line of the charging unit when power is supplied from the battery module or the power supply device. 16. The method of claim 15,
The battery module is
a battery unit for charging or discharging;
a protection unit capable of connecting or blocking the ground electrode of the battery module and the ground electrode of the charging unit management circuit;
In order to control charging or discharging of the battery unit, a battery unit control unit for controlling on or off driving of the protection unit,
When a potential difference is formed between the positive electrode of the battery module and the charging part ground line by the photo coupler, the battery part control unit receives power from the battery module or the power supply device to turn on the protection part vacuum cleaner.

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