KR20130101235A - Battery balancing system for reusing of energy and method thereof - Google Patents

Abstract

PURPOSE: A battery balancing system reusing energy and a battery balancing method are provided to reuse the energy consumed during the balancing process by storing the energy consumed during the balancing process of a battery and supplying the stored energy to an electronic device connected to the outside. CONSTITUTION: A corresponding battery balancing system (1) includes a battery part (2), a battery management part (3) and an electronic device management part (4). The battery part performs charging and discharging of energy. The battery management part controls the charging and discharging. The electronic device management part stores electric energy discharged from the battery part during cell balancing process and supplies operation power appropriate for the power information discriminated from an external electronic device (6) selectively when the external electronic device is connected to a connection port (5). The electronic device management part includes a first selector part (41), an energy storing part (42), a second selector part (43) and a control part (46). [Reference numerals] (2) Battery part; (3) Battery management part; (4) Electronic device management part; (41) First selector part; (42) Energy storing part; (43) Second selector unit; (44) Switch unit; (45) Voltage measuring unit; (46) Control part; (6) External electronic device; (AA,421) Energy storage unit

Description

Battery balancing system for reusing of energy and method

The present invention relates to a battery balancing system and a battery balancing method, and more particularly, a battery balancing system and a battery balancing that reuse energy by storing energy consumed in a battery balancing process and supplying it to be connected to an external electronic device. It is about a method.

When using batteries in electric vehicles, the charge amount of individual battery cells is different from each other due to temperature effects, electrochemical effects, physical differences in battery cells, and differences in internal resistance. That is, SOC (State of Charge) difference and voltage difference occur between individual battery cells.

When a deviation occurs in the charge capacity of the battery cell, overcharge and overdischarge occur in some battery cells. When overcharge and overdischarge occur, battery life is shortened due to deterioration of the battery cell, which in turn damages the stable power supply of the electronic devices to which electricity is supplied. Accordingly, the battery management system (BMS) performs an operation of balancing the charge states of individual batteries by balancing the battery cells as necessary.

When balancing battery cells, voltage variations between cells are eliminated by using a method of selecting and charging individual cells having a low voltage or a method of selecting and discharging a cell having a high voltage. Here, the charging method of the individual cells has an additional power consumption, and there is a problem in that the cost required to implement the circuit required to control the charging frequently in units of individual cells. In addition, since the discharging method of the individual cells is simply a method of consuming electricity for the voltage balance between the cells, there is a problem of waste of energy.

The present invention was conceived in consideration of the above-described prior art, and a battery balancing system capable of storing energy consumed during a balancing process of a battery mounted in a vehicle and supplying energy corresponding to operating power identified from an external electronic device connected thereto. And a battery balancing method.

Another object of the present invention is to store the energy consumed during the balancing process of the battery in each storage unit divided by operating power, and to select the storage unit corresponding to the operating power of the connected electronic device to supply energy to the electronic device It is.

The battery balancing system for reusing energy according to the present invention for achieving the above technical problem, the operating power of the external electronic device connected through the connection port using the balancing discharge current generated in the battery pack including a plurality of battery cells A battery balancing system capable of supplying a battery comprising: an energy storage unit including one or more energy storage units; A first selector unit which selectively connects a discharge target cell among the plurality of battery cells and outputs a balancing discharge current output from the battery cell as a charging current of an energy storage unit to be charged; A second selector unit for selectively connecting an energy storage unit identified as capable of outputting operating power of the external electronic device to output discharge power output from the energy storage unit as operating power of the external electronic device; And identifying the battery cell to be discharged, controlling the connection operation of the first selector unit using the information of the identified battery cell, identifying the energy storage unit to be discharged, and using the information of the identified energy storage unit. And a control unit controlling a connection operation of the second selector unit.

In the present invention, the battery balancing system includes a common discharge connected between the first selector unit and the energy storage unit, and the charging currents outputted through the first selector unit from each cell to be discharge balancing are flowed together. It further includes a conductor.

Here, the battery balancing system, the switch unit for turning on or off the electrical connection between the first selector unit and each energy storage unit; And a voltage measuring unit measuring a voltage level of each energy storage unit and outputting the measured voltage level to the controller.

In addition, the control unit identifies the charged energy storage unit only by using the voltage level and controls the switch of the identified energy storage unit to turn off the electrical connection between the common discharge lead and the identified energy storage unit.

Furthermore, when there are a plurality of energy storage units, the controller controls the switch unit to simultaneously connect the common discharge lead and each energy storage unit at the same time or selectively connect them in a certain order.

According to an aspect of the invention, the battery balancing system, the battery unit is configured in at least one battery cell unit for outputting a balancing discharge current as needed; And a battery manager for detecting a charge state of the individual battery cells and controlling charge and discharge.

Preferably, when the controller receives from the battery management unit state information including at least one identification information of the battery cells to be used for balancing the battery, the dischargeable energy, the instantaneous maximum power allowance, and the battery output voltage, Controls the line connection of the battery cell.

Here, when each energy storage unit is in a fully charged state, the controller controls the discharge current output from the battery cell to be balanced to flow through the resistance of the discharge circuit.

Further, when receiving the operating power information of the external electronic device connected to the connection port, the controller selects at least one energy storage unit capable of outputting the operating power to the electronic device, and outputs from the selected energy storage unit The control signal is output to the second selector so that the discharge power is transferred to the operating power of the external storage device.

Here, the control unit receives the operating power information including the instantaneous maximum input power allowance and the output voltage of the electronic device from the connected external electronic device.

In addition, when the electronic device is connected, the controller compares the charging state of each energy storage unit with the operating power information of the electronic device, and includes a reverse voltage protection condition, an overcharge protection condition, and an operating power range condition of the electronic device. When the safety condition is satisfied, the line connection of the energy storage unit is controlled through the second selector.

Battery balancing method for reusing energy according to the present invention for achieving the above technical problem, the operating power of the external electronic device connected through the connection port using the balancing discharge current generated in the battery pack including a plurality of battery cells A battery balancing method, comprising: (a) a battery identification step of receiving status information on at least one battery cell that is a cell balancing target; (b) a storage unit identification step of identifying at least one energy storage unit that can be charged among the plurality of energy storage units using the received state information; (c) an energy storage step of controlling a discharge current output from the battery cell identified by using the identification information of the battery cell and the energy storage unit identification information to be charged in the energy storage unit; (d) an electronic device identification step of identifying operating power information of the electronic device when an external electronic device is connected; And (e) selecting at least one energy storage unit capable of supplying operating power of the electronic device according to the identified operating power information. (f) an energy supply step of controlling the discharge power output from the selected energy storage unit to be supplied to the operating power of the electronic device.

According to an aspect of the present invention, when the energy consumed during the balancing process of the battery is detected and the external connection of the electronic device is detected, the energy stored in the electronic device may be supplied to reuse the energy that was simply consumed during the balancing process.

According to another aspect of the present invention, an electronic device having various electric powers may be connected to an automobile, and each time the electronic device is connected, various electronic devices may be selectively supplied by supplying energy for a unique operating power identified from the electronic device. It can be charged conveniently.

The following drawings attached to this specification are illustrative of preferred embodiments of the present invention, and together with the detailed description of the invention to serve to further understand the technical spirit of the present invention, the present invention is a matter described in such drawings It should not be construed as limited to.
1 is a schematic configuration diagram of a battery balancing system according to an embodiment of the present invention.
2 is a schematic circuit diagram of a battery balancing system according to an embodiment of the present invention.
3 is a schematic flowchart of a battery balancing method according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

1 is a schematic configuration diagram of a battery balancing system 1 according to an embodiment of the present invention.

Referring to FIG. 1, the battery balancing system 1 according to the present invention includes a battery unit 2 that performs charge / discharge of energy, a battery manager 3 that controls charge / discharge of the battery unit 2, and a cell of a battery. In the balancing process, the electric energy discharged from the battery unit 2 is stored, and when the external electronic device 6 is connected to the connection port 5, selectively supplying operating power corresponding to the power information identified from the electronic device 6. It is configured to include an electronic device management unit (4).

The battery unit 2 is a battery assembly composed of at least one battery cell. That is, the battery unit 2 may be understood as a collection of batteries such as a battery module composed of a plurality of battery cells, a battery pack composed of a plurality of battery modules, and the like. Hereinafter, for convenience of description, each set unit constituting the battery unit 2 will be referred to as a battery cell. The battery unit 2 performs a cell balancing of the discharge type when a state of charge (SOC) deviation occurs between individual battery cells during charging and discharging. Output discharge current through discharge.

The battery manager 3 generally controls charging and discharging of the battery unit 2, monitoring of the electrical state and temperature of the battery unit 2, protection operation for each battery cell, and cell balancing operation.

The battery management unit 3 may correspond to a battery management device known as a battery management system (BMS) in the technical field to which the present invention belongs, but the present invention is not limited thereto.

The battery manager 3 selectively controls the balancing operation of the battery cells while the battery unit 2 is being charged and discharged. That is, the battery manager 3 uses the voltage detection circuit, the temperature detection circuit, the current detection circuit, and the like, which are electrically coupled with the battery unit 2 during the charging or discharging process of the battery unit 2. Monitor the charge status of each battery cell included in the). Since a technique for estimating the state of charge of a cell by monitoring various electrochemical properties of a battery is widely known, a detailed description thereof will be omitted. In addition, the battery manager 3 compares the state of charge of each of the monitored battery cells with each other and detects that there is a charge state difference greater than or equal to the limit between the battery cells. Reduce the gap in charge.

In the conventional battery cell balancing, on the other hand, the battery manager 3 discharges the energy of a battery cell having a relatively high state of charge through a resistor to simply consume energy.

On the other hand, in the present invention, by combining the electronic device management unit 4 with the battery management unit 3, the electronic device 6 is connected to the energy to be consumed through the resistor 4 through the connection port 5 It is characterized by reusing energy by supplying with operating energy of).

Specifically, the electronic device manager 4 receives the discharge current output from the battery unit 2 during the balancing process of the battery cell as an EDMU (Electric Device Management Unit) and stores it in the energy storage unit 421 having different capacities. . When the electronic device manager 4 detects that the electronic device 6 is connected through the connection port 5, the electronic device manager 4 identifies an energy storage unit 421 capable of outputting an operating power suitable for the electronic device 6. Then, using the power stored in the energy storage unit 421 is supplied as the operating power of the electronic device (6).

Here, the electronic device 6 includes at least one battery capable of charging and discharging therein. The electronic device 6 may charge the battery using the operating power supplied through the electronic device manager 4 and perform a unique operation of the electronic device 6. In addition, the individual batteries of the electronics 6 have a band of unique operating voltages. For example, a small electronic device such as a portable cassette or a language unit may have an operating voltage band of about 3V. Portable multimedia devices such as iPhones and iPads, communication devices, etc. may have an operating voltage band of about 5V. In addition, the navigation, black box, PMP, notebook, etc. may have an operating voltage band of about 12V.

Meanwhile, in the case of an electric vehicle, electronic devices 6 having various operating voltage bands may be connected through external connection ports 5 such as a cigar jack port and a USB port provided in the dashboard. When the electronic device manager 4 detects that the electronic device 6 is connected through the connection port 5, the electronic device manager 4 identifies operating power information such as a voltage and a current of the electronic device 6 and connects the connection port ( Supply power according to 5). Thus, in the present invention, even if any electronic device 6 is connected to the connection port 5 of the electric vehicle without a unique power conversion adapter, it is possible to supply power required for charging or operating the electronic device 6.

Preferably, the electronic device management unit 4 includes a first selector unit 41, an energy storage unit 42, a second selector unit 43, and a controller 46. In addition, the energy storage unit 42 includes a plurality of energy storage units 421 having different capacities and output characteristics.

The first selector 41 selectively switches the line connection so that the discharge current output from the battery 2 can be supplied to the energy storage unit 421 as charging power during the balancing of the battery cells. The control unit 46 controls the first selector unit 41 to control the line connection so that the discharge current output from the battery unit 2 can flow to any one energy storage unit 421. In addition, the controller 46 senses the connection of the electronic device 6 through the connection port 5 and identifies the energy storage unit 421 suitable for the operating power of the electronic device 6. Then, the control unit 46 controls the second selector unit 43 to control the line connection so that the power stored in the identified energy storage unit 421 can be supplied as the operating power of the electronic device 6.

More specifically, the first selector 41 receives a control signal from the controller 46 and selectively connects a line of at least one battery cell to be discharged according to the control signal. Then, the discharge current output from the connected battery cell of the balancing target is output as the charging current through the first selector 41 and stored in the energy storage unit 421.

The energy storage unit 42 is composed of a plurality of energy storage units 421 divided by each power capacity. For example, the energy storage unit 421 may be a capacitor, a battery, and the like, as long as charging and discharging are possible for energy reuse. Each energy storage unit 421 is selected by the control of the controller 46, and the selected energy storage unit 421 is applied with the storage of the charging current output through the first selector unit 41.

The second selector unit 43 receives a control signal from the controller 46 when the connection of the connection port 5 of the electronic device 6 is detected, and the operating power identified from the electronic device 6 according to the control signal. Selectively switching the line connection of at least one energy storage unit 421 capable of outputting a discharge power corresponding to. Then, the discharge power output from the connected energy storage unit 421 is supplied to the operating power of the electronic device 6 through the second selector 43.

Here, the electronic device manager 4 may further include a switch 44. The switch unit 44 may be configured as a switch element that electrically connects the first selector unit 41 and each energy storage unit 421. The switch unit 44 performs a switch-on operation so that the charging current output through the first selector unit 41 can be charged to each energy storage unit 421 according to the control signal of the controller 46.

In addition, the electronic device managing unit 4 may further include a voltage measuring unit 45. The voltage measuring unit 45 measures the voltage level of each energy storage unit 421 and outputs a signal indicating the identification number and the voltage level of the individual energy storage unit 421 to the controller 46. Then, the controller 46 may select the energy storage unit 431 capable of charging the balancing discharge current using the received voltage level of the individual energy storage unit 421.

The controller 46 receives state information about at least one battery cell, which is a cell balancing target, from among the cells included in the battery unit 2 from the battery manager 3. Here, the state information includes identification information on the battery cell, the dischargeable energy, the instantaneous maximum discharge power allowance, and the battery output voltage. Then, the controller 46 outputs a control signal to the first selector unit 41 so that the discharge current output from the battery cell identified as the balancing target is transferred to the energy storage unit 42 through the first selector unit 41. Allows output from charging current.

In addition, the controller 46 receives state information of each energy storage unit 421 from the voltage measuring unit 45. The state information includes the voltage level of the energy storage unit 421. Then, the controller 46 identifies the rechargeable energy storage unit 421 using the received state information. The control unit 46 instructs the switch unit 44 to switch on the charging current output through the first selector unit 41 to the identified energy storage unit 421. As a result, the controller 46 may control the first selector 41 and the switch 44 to charge the discharge current output from the battery 2 to each of the selected energy storage units 421. .

On the other hand, when the electronic device 6 is connected to the electronic device management unit 4 through the connection port 5, the control unit 46 receives the operating power information from the electronic device 6, Detect a connection. The power information includes the operating energy of the electronic device 6, the instantaneous maximum input power allowance or the charging voltage. The controller 46 selects an energy storage unit 421 capable of supplying operating power of the electronic device 6 using the received operating power information. Then, the controller 46 outputs a control signal to the second selector unit 43 so that the corresponding energy storage unit 421 selected by the second selector 43 through the line connection can perform a discharge operation. To become. Then, power is discharged from the line-connected energy storage unit 421 and the discharged power is supplied as charging power of the electronic device 6 through the second selector 43.

2 is a schematic circuit diagram of a battery balancing system 1 according to an embodiment of the present invention.

As shown in FIG. 2, the battery unit 2 may be configured in a unit of a battery pack, which is an assembly of a plurality of battery cells 21. The battery manager 3 controls charging and discharging while monitoring the electrochemical state information detected from the individual battery cells 21. Here, when the battery manager 3 detects that the state of charge of each battery cell 21 varies more than a threshold level, the switch 31 provided for each battery cell 21 to be balanced. By controlling the control circuit connected to the on state to perform the cell balancing by the discharge method.

At this time, the controller 46 receives the state information on the battery cells 21 to be balanced from the battery manager 3. The control unit 46 provides a control signal for selectively connecting a line with the battery cell 21 to the first selector unit 41 using the information on the battery cells 21 to be balanced, which are identified from the received state information. Output The first selector unit 41 selectively connects the line of the battery cell 21 using an internal switching circuit element in accordance with the output control signal. Then, most of the discharge current output from the battery cell 21 to be balanced flows through the first selector part 41 having a relatively small resistance.

In addition, the controller 46 determines the state of charge by using the voltage level of each energy storage unit 421 output from the voltage measuring unit 45. The controller 46 selects an energy storage unit 421 that can be charged using the identified state of charge of the individual energy storage unit 421. The controller 46 controls the corresponding switch 441 to be turned on so that the charging current output through the first selector 41 can flow into the selected energy storage unit 421.

Here, the first selector 41 and the energy storage unit 421 may be connected by a common discharge lead 47. In the common discharge lead 47, the charging currents output through the first selector 41 are collected and flow.

In addition, when the control unit 46 controls the first selector unit 41 to charge each energy storage unit 421, the control unit 46 controls the switch 441 and the common discharge lead 47. Each energy storage unit 421 may be connected at the same time or selectively connected in a certain order. For example, the controller 46 may identify the energy storage unit 421 that is supplying power to the connected electronic device 6, and perform priority charging by first connecting the switch 441 to the on state. have. Alternatively, the controller 46 may select the energy storage unit 441 in the order of low charging state and connect the switches 441 in order to perform charging. In addition, there may be a selection criteria of various filling sequences.

Then, when the electronic device 6 is connected via the connection port 5, the control unit 46 is built in the electronic device 6, various electrical characteristic values of the connected electronic device 6, that is, the upper limit of the operating power Identify the state of charge of the battery, etc. The technique for identifying the electrical characteristic value of the electronic device 6 can be used in a variety of ways commonly known in the art. For example, the controller 46 may receive information related to an electrical characteristic value from the electronic device 6 through the connection port 5. Once the electrical characteristic value of the electronic device 6 is identified, the controller 46 identifies at least one energy storage unit 421 capable of outputting the operating power of the electronic device 6. 3 illustrates an energy storage unit 421 capable of outputting three different levels of power for convenience of description, but the present invention is not limited thereto.

Then, the controller 46 compares the state of charge of the identified energy storage unit 421 with the electrical characteristic value of the electronic device 6 to determine whether a predetermined safety condition is met. Here, the safety condition is whether the voltage of the energy storage unit 421 is greater than the battery voltage of the electronic device 6, whether the battery voltage of the electronic device 6 is less than the overvoltage level, the energy storage unit 421 Whether or not the operating power that can be output from the electronic device 6 is within the input power range. If it is determined that the safety condition is satisfied, the control unit 46 controls the second selector unit 43 to connect the identified energy storage unit 421 and the electronic device 6 to the operation required by the electronic device 6. Power is applied to the electronic device 6 side. In addition, while operating power is applied to the electronic device 6, the controller 46 periodically monitors the state of charge of the energy storage unit 421 using the voltage measuring unit 45. When the state of charge reaches a level at which it is difficult to transmit power in the monitoring process, the controller 46 controls the second selector 43 to release electrical connection between the energy storage unit 421 and the electronic device 6. .

Here, the controller 46 may select a plurality of energy storage units 421 capable of outputting the operating power of the electronic device 6. In this case, the controller 46 preferably selects the energy storage unit 421 having a high state of charge to transfer operating power to the electronic device 6. In addition, the control unit 46 may detect that the state of charge of the energy storage unit 421 is reduced to a level where power is difficult to transmit using the voltage measuring unit 45 in the process of power transmission. Then, the controller 46 controls the second selector unit 43 to electrically connect the electronic device 6 with another energy storage unit 421 capable of providing the operating power required by the electronic device 6. This allows continuous power delivery. Even in this case, when the state of charge of the other energy storage unit 421 is also lowered above the limit, power transmission may be cut off and replaced with another replaceable energy storage unit 421.

The operating power applied to the electronic device 6 side can be used for charging the battery of the electronic device 6 and for driving the electronic device 6. The electronic device 6 generally has a function of blocking the flow of charging current when the battery is fully charged. Therefore, the power transfer from the identified energy storage unit 421 to the electronic device 6 side can be automatically stopped when the battery of the electronic device 6 is fully charged.

On the other hand, the controller 46 may determine the voltage level of the entire energy storage unit 421 measured by the voltage measuring unit 45 as a fully charged state. In this case, the controller 46 controls the discharge current output from the battery cell 21 to flow through the resistor 32 to perform the same battery cell balancing as before. For example, the control unit 46 outputs a control signal to the first selector unit 41 and turns off the connection of the line through which the discharge current output from the battery cell 21 flows through the first selector unit 41. Block in state. Then, the discharge current output from the battery cell 21 flows through the resistor 32 included in the discharge circuit, and energy is consumed by Joule heat as in normal cell balancing.

3 is a schematic flowchart of a battery balancing method according to an embodiment of the present invention.

The battery balancing method for reusing energy according to an embodiment of the present invention may be preferably realized through the operation of the battery balancing system 1 described above.

First, the battery manager 3 detects a variation in charge capacity corresponding to the start of cell balancing in the process of controlling charging and discharging of each battery cell 21. The battery manager 3 outputs information of at least one battery cell 21 for discharging energy to the controller 46 of the electronic device manager 4 in order to equalize the state of charge of each cell. Then, the controller 46 receives the battery cell 21 information from the battery manager 3 and identifies the battery cell 21 to be balanced (S11).

When the battery to be balanced is identified, the control unit 46 uses the charging state information collected against each energy storage unit 421 through the voltage measuring unit 45 to discharge current consumed by cell balancing of the battery. At least one energy storage unit 421 to be charged is identified (S12).

Here, the controller 46 receives the charging state of each energy storage unit 421 detected by the voltage measuring unit 45. Then, the controller 46 may identify the energy storage unit 421 to be preferentially charged from the plurality of energy storage units 421 according to a predetermined selection criterion.

When the rechargeable energy storage unit 421 is identified, the controller 46 controls the first selector unit 41 and the switch 441 to receive the discharge current output from the battery cell 21 by the first selector unit 41. The charged energy storage unit 421 is charged by outputting with a charging current through step S13.

Here, the first selector 41 selectively connects the lines of the identified battery cells 21 in accordance with the control signal received from the controller 46. In addition, the switch 441 of the identified energy storage unit 421 receives a control signal from the controller 46 and connects the line in an on state. The charging current output from the first selector part 41 by the line connection is transmitted to the energy storage unit 421 connected to the switch 441 via the common discharge lead 47. As a result, the energy storage unit 441 is recharged by reusing the energy discharged during the cell balancing process of the battery.

If the controller 46 determines the state of charge of the entire energy storage unit 421 as the state of full charge through the voltage measuring unit 45, the controller 46 controls the battery cell 21 as in normal cell balancing. By controlling the discharge current outputted from the current flow through the resistor 32 of the discharge circuit to control the electrical energy is consumed as thermal energy (S131).

After the electric power is charged to the energy storage unit 421 and the electronic device 6 is connected to the connection port 5, the control unit 46 receives the operating power information from the electronic device 6. ) Detects a connection of the electronic device 6 and identifies operating power of the electronic device 6 using the received operating power information (S14).

When the connection of the electronic device 6 is detected, the controller 46 selects at least one energy storage unit 421 capable of supplying the identified operating power among the plurality of energy storage units 421 (S15).

When the energy storage unit 421 is selected, the control unit 46 controls the second selector unit 43 so that the electric power charged in the selected energy storage unit 421 is output as the operating power of the electronic device 6. . Thereafter, the electronic device 6 may also charge the internal battery using the supplied electric power and perform a corresponding operation according to the user's operation of the device.

Here, the controller 46 may compare the charging state of the selected energy storage unit 421 with the power information of the electronic device 6 to determine whether a predetermined safety condition is satisfied. If the controller 46 determines that the safety condition including the reverse voltage protection condition, the overcharge protection condition, the operating power range condition of the electronic device 6, and the like is satisfied, then the control is applied to supply the energy to the electronic device 6. The signal is output to the second selector 43. Then, the second selector 43 selectively connects the line of the energy storage unit 421 to be discharged by the control signal to start supplying operating power to the electronic device 6.

In the above-described embodiment, the term "~ part" is not used to mean a hardware division of the battery balancing system 1. Accordingly, a plurality of constituent parts may be integrated into one constituent part, and one constituent part may be divided into a plurality of constituent parts. Also, the constituent unit may mean a hardware constituent unit, but may mean a constituent unit of software. Therefore, it should be understood that the present invention is not particularly limited by the term "part ".

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It goes without saying that various modifications and variations are possible within the scope of equivalence of the scope.

1: Battery balancing system 2: Battery unit
3: battery management unit 4: electronic device management unit
41: first selector 42: energy storage
43: second selector 44 44: switch
45: voltage measuring unit 46: control unit

Claims (18)

A battery balancing system capable of supplying the operating power of an external electronic device connected through a connection port by using a balancing discharge current generated from a battery pack including a plurality of battery cells,
An energy storage unit including one or more energy storage units;
A first selector unit which selectively connects a discharge target cell among the plurality of battery cells and outputs a balancing discharge current output from the battery cell as a charging current of an energy storage unit to be charged;
A second selector unit for selectively connecting an energy storage unit identified as capable of outputting operating power of the external electronic device to output discharge power output from the energy storage unit as operating power of the external electronic device; And
Identifying the battery cell to be discharged, controlling the connection operation of the first selector unit using the information of the identified battery cell, identifying the energy storage unit to be discharged, and using the information of the identified energy storage unit Control unit for controlling the connection operation of the second selector unit
Battery balancing system comprising a. The method of claim 1,
The battery balancing further comprises a common discharge lead connected between the first selector unit and the energy storage unit and in which charge currents output through the first selector unit are collected from each cell to be discharge balancing target. system. 3. The method according to claim 1 or 2,
A switch unit for turning on or off an electrical connection between the first selector unit and each energy storage unit; And
And a voltage measuring unit measuring the voltage level of each energy storage unit and outputting the measured voltage level to the controller. The method of claim 3, wherein
The control unit,
Identifying the fully charged energy storage unit using the voltage level and controlling the switch of the identified energy storage unit to turn off the electrical connection between the common discharge lead and the identified energy storage unit. The method of claim 3, wherein
The control unit,
When there are a plurality of energy storage units, the battery balancing system, characterized in that for controlling the switch unit to connect the common discharge lead and each energy storage unit at the same time or selectively connected in a certain order. The method of claim 1,
A battery unit configured to include at least one battery cell and output a balancing discharge current as necessary; And
The battery balancing system further comprises a battery management unit for detecting the charge state of the individual battery cells and controls the charge and discharge. The method according to claim 1 or 6,
The control unit,
When the battery management unit receives status information including at least one battery cell identification information, dischargeable energy, instantaneous maximum power allowance, or battery output voltage to be used for balancing the battery, the circuit connection of the corresponding battery cell is performed through the first selector unit. Battery balancing system, characterized in that for controlling. The method according to claim 1 or 6,
The control unit,
And when each energy storage unit is in a fully charged state, controlling the discharge current output from the battery cell to be balanced to flow through the resistance of the discharge circuit. The method according to claim 1 or 6,
The control unit,
When receiving the operating power information of the external electronic device connected to the connection port, at least one energy storage unit capable of outputting the operating power to the electronic device is selected, the discharge power output from the selected energy storage unit is the external storage device The battery balancing system, characterized in that for outputting a control signal to the second selector unit to be delivered at the operating power of. The method of claim 9,
The control unit,
And receiving operating power information including an instantaneous maximum input power allowance and an output voltage of the electronic device from a connected external electronic device. The method of claim 9,
The control unit,
When the electronic device is connected, the charging state of each energy storage unit is compared with the operating power information of the electronic device, and the safety condition including the reverse voltage protection condition, the overcharge protection condition and the operating power range condition of the electronic device is satisfied. And controlling the line connection of the energy storage unit through a second selector. In the battery balancing method of supplying the operating power of the external electronic device connected through the connection port using the balancing discharge current generated in the battery pack including a plurality of battery cells,
(a) a battery cell identification step of receiving status information on at least one battery cell that is a target of cell balancing;
(b) a storage unit identification step of identifying at least one energy storage unit that can be charged among the plurality of energy storage units using the received state information;
(c) an energy storage step of controlling a discharge current output from the battery cell identified by using the identification information of the battery cell and the energy storage unit identification information to be charged in the energy storage unit;
(d) an electronic device identification step of identifying operating power information of the electronic device when an external electronic device is connected; And
(e) a storage unit selecting step of selecting at least one energy storage unit capable of supplying operating power of the electronic device according to the identified operating power information;
(f) an energy supply step of controlling the discharge power output from the selected energy storage unit to be supplied to the operating power of the electronic device;
Battery balancing method comprising a. The method of claim 12,
The step (a)
And receiving status information including the identification information of the battery cell to which the discharge current is to be output, the dischargeable energy, the instantaneous maximum power allowance, or the battery output voltage from the battery manager. The method of claim 12,
The step (b)
Receiving the voltage level of each energy storage unit, the battery balancing method characterized in that it is determined whether the charge and the charging order according to the state of charge. The method of claim 12,
The step (c)
And performing a line connection such that the discharge current output from the identified battery cell is output as the charging current of the identified energy storage unit. The method according to claim 12 or 15, wherein
The step (c)
If each energy storage unit is determined to be in a fully charged state, controlling the discharge current output from the battery cells to be balanced to flow through the resistance of the discharge circuit. The method of claim 12,
The step (d)
And receiving operating power information including electronic device operating energy, instantaneous maximum input power allowance or charging voltage from the connected electronic device. The method of claim 12,
The step (f)
When the state of charge of the identified energy storage unit is compared with the operating power information of the electronic device, the identified energy storage unit is satisfied when a safety condition including a reverse voltage protection condition, an overcharge protection condition, and an operating power range condition of the electronic device is satisfied. And applying an operating power supply to the electronic device from the battery.

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