KR20210047156A - Apparatus for managing battery - Google Patents

Abstract

A device for managing a battery according to one embodiment of the present invention relates to the device for managing the battery for charging a capacitor connected in parallel on a main charge/discharge path of a battery pack having a plurality of battery modules, comprising: a plurality of switching units configured to be connected in series with respect to each of the plurality of battery modules; a plurality of diodes connected in parallel to the battery module and the switching unit corresponding to each other, connected, by a positive pole, to a negative terminal side of the corresponding battery module, and connected, by a negative pole, to a positive terminal side of the corresponding battery module; and a control unit configured to charge the capacitor by controlling an operation state of the plurality of switching units.

Description

Battery management device {APPARATUS FOR MANAGING BATTERY}

The present invention relates to a battery management apparatus, and more particularly, to a battery management apparatus capable of effectively lowering the required specifications of the precharge relay and the precharge resistance.

In recent years, as the demand for portable electronic products such as notebook computers, video cameras, portable telephones, etc. is rapidly increasing, and the development of electric vehicles, energy storage batteries, robots, satellites, etc. There is an active research on the Korean market.

Currently commercialized batteries include nickel cadmium batteries, nickel hydride batteries, nickel zinc batteries, and lithium batteries, among which lithium batteries have little memory effect compared to nickel-based batteries, so they are free to charge and discharge, and have a very high self-discharge rate. It is in the spotlight for its low energy density and high energy density.

A battery pack including such a battery may be provided with a precharge circuit and a smoothing capacitor in order to prevent inrush current output from the battery. This precharge circuit is a configuration for precharging a smoothing capacitor, and generally includes a precharge relay and a precharge resistor.

However, the precharge relay and the precharge resistor have a problem in that the specifications required according to the voltage of the battery pack increase. That is, as the output voltage of the battery pack increases, a large-capacity precharge resistor and a large current precharge relay are required.

As the specifications of the precharge resistor and the precharge relay increase, the cost for this increases, so that a technique for lowering the specifications of the precharge relay has been known (Patent Document 1).

Patent Document 1 discloses a configuration in which the specification of the precharge relay can be lowered to a low voltage relay by changing the turn-on order of the precharge relay and the main (-) relay. However, as the number of battery cells connected in series increases or the capacity of the connected battery cells increases, a larger voltage is inevitably applied to the precharge relay. Therefore, Patent Document 1 has a limit in effectively lowering the required specification of the precharge relay.

KR 10-2014-0066360 A

The present invention is conceived to solve the above problems, and by configuring the switching unit so that only the voltage of the battery module corresponding to the precharge relay and the precharge resistor is applied, the required specifications of the precharge relay and the precharge resistor are set. It is an object of the present invention to provide a battery management device that can be effectively lowered.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by examples of the present invention. In addition, it will be easily understood that the objects and advantages of the present invention can be realized by the means shown in the claims and combinations thereof.

The battery management apparatus according to an aspect of the present invention may be configured to charge a capacitor connected in parallel on a main charge/discharge path of a battery pack including a plurality of battery modules.

A battery management apparatus according to an aspect of the present invention includes a plurality of switching units configured to be connected in series with respect to each of the plurality of battery modules; A plurality of diodes connected in parallel to the corresponding battery module and the switching unit, a positive electrode connected to a negative terminal side of the corresponding battery module, and a negative electrode connected to a positive terminal side of the corresponding battery module; And a control unit configured to charge the capacitor by controlling the operation states of the plurality of switching units.

The plurality of switching units may include a main relay disposed on the main charge/discharge path; A precharge relay disposed on a precharge path connected in parallel to the main charge/discharge path; And a precharge resistor disposed on the precharge path and connected in series with the precharge relay.

The controller may be configured to turn on and off a connection between the plurality of battery modules and the main charge/discharge path by controlling an operation state of the precharge relay.

The plurality of switching units may be configured such that one end is connected to one end of a corresponding battery module among the plurality of battery modules, and the other end is connected to one end of a corresponding diode among the plurality of diodes.

The plurality of diodes may be configured such that the other end is connected to the other end of a corresponding battery module among the plurality of battery modules.

The control unit may be configured to charge the capacitor by simultaneously controlling operation states of a plurality of precharge relays included in the plurality of switching units to a turn-on state.

The control unit may be configured to charge the capacitor by sequentially controlling an operation state of a plurality of precharge relays included in each of the plurality of switching units to a turn-on state according to a predetermined condition.

The battery management apparatus according to another aspect of the present invention may further include a voltage measuring unit configured to measure voltages of each of the plurality of battery modules and transmit the measurement result to the control unit.

The control unit receives the measurement result from the voltage measurement unit, sets a sequence number of a precharge relay to control the operation state among the plurality of precharge relays based on the received measurement result, and sets the sequence number of the precharge relay according to the set sequence number. It may be configured to sequentially control the operating states of the plurality of precharge relays.

The battery management apparatus according to another aspect of the present invention may further include a temperature measuring unit configured to measure the temperature of each of the plurality of battery modules and transmit the measurement result to the control unit.

The control unit receives the measurement result from the temperature measurement unit, sets a sequence number of a precharge relay to control the operation state among the plurality of precharge relays based on the received measurement result, and sets the sequence number of the precharge relay according to the set sequence number. It may be configured to sequentially control the operating states of the plurality of precharge relays.

The battery management apparatus according to another aspect of the present invention may further include a storage unit configured to store a state control history, which is sequential information in which operation states of the plurality of precharge relays are controlled when the capacitor is charged.

The control unit sets a sequence number of a precharge relay to control the operation state among the plurality of precharge relays, based on a state control history stored in the storage unit, and operates the plurality of precharge relays according to the set sequence number. It can be configured to control the state sequentially.

The control unit obtains sequential information in which each of the precharge relays included in the plurality of switching units is turned on by referring to the state control history, and based on a result of sorting the obtained sequential information, the plurality of It can be configured to set the sequence number of the precharge relay of.

BMS according to another aspect of the present invention may include a battery management device according to the present invention.

A battery pack according to another aspect of the present invention may include a battery management apparatus according to the present invention.

According to an aspect of the present invention, there is an advantage in that a capacitor can be quickly precharged even without using a large-capacity precharge resistor and a high-current precharge relay.

In addition, according to an aspect of the present invention, since the required specifications of the relay and resistance used for precharge may be lowered, the internal space of the battery management apparatus and the battery pack may be efficiently utilized.

In addition, according to an aspect of the present invention, since the required specifications of the relay and the resistor can be lowered, there is an advantage that the production cost of the battery management device can be reduced.

In addition, while the output power of the battery pack including the battery management apparatus according to an aspect of the present invention is maintained high, the size of the battery pack is simplified, and production cost can be reduced.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

The following drawings attached to the present specification serve to further understand the technical idea of the present invention together with a detailed description of the present invention to be described later, and the present invention should not be construed as being limited to the matters described in such drawings.
1 is a diagram schematically showing a battery pack including a battery management apparatus according to an embodiment of the present invention.
2 is a diagram showing an exemplary configuration of a battery pack including a battery management apparatus according to an embodiment of the present invention.
3 is a diagram illustrating a first operation configuration of a battery pack including a battery management apparatus according to an embodiment of the present invention.
4 is a diagram illustrating a second operation configuration of a battery pack including a battery management apparatus according to an embodiment of the present invention.
5 is a diagram illustrating a third operation configuration of a battery pack including a battery management apparatus according to an embodiment of the present invention.
6 is a diagram illustrating an example of a state control history stored in a battery management device according to an embodiment of the present invention.

The terms or words used in the specification and claims should not be construed as being limited to their usual or dictionary meanings, and the inventor may appropriately define the concept of terms in order to describe his own invention in the best way. It should be interpreted as a meaning and concept consistent with the technical idea of the present invention based on the principle that there is.

Accordingly, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiment of the present invention, and do not represent all the technical spirit of the present invention. It should be understood that there may be equivalents and variations.

In addition, in describing the present invention, when it is determined that a detailed description of a related known configuration or function may obscure the subject matter of the present invention, a detailed description thereof will be omitted.

Terms including an ordinal number, such as first and second, are used for the purpose of distinguishing one of various elements from the others, and are not used to limit the elements by such terms.

Throughout the specification, when a part "includes" a certain component, it means that other components may be further included, rather than excluding other components unless specifically stated to the contrary.

In addition, terms such as a control unit described in the specification mean a unit that processes at least one function or operation, which may be implemented as hardware or software, or a combination of hardware and software.

In addition, throughout the specification, when a part is said to be "connected" with another part, it is not only "directly connected", but also "indirectly connected" with another element interposed therebetween. Includes.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram schematically showing a battery pack 1 including a battery management apparatus 100 according to an embodiment of the present invention. 2 is a diagram showing an exemplary configuration of a battery pack 1 including the battery management apparatus 100 according to an embodiment of the present invention.

1 and 2, the battery pack 1 may include a battery module 10, a battery management device 100, and a capacitor 20.

Preferably, the battery pack 1 may include a plurality of battery modules 10a, 10b and 10c. Here, the battery module 10 may be provided with one or more battery cells connected in series and/or in parallel. In addition, the battery cell refers to one independent cell that has a negative terminal and a positive terminal, and is physically separable. For example, one pouch-type lithium polymer cell may be regarded as a battery cell.

Hereinafter, for convenience of explanation, it is assumed that one battery cell is provided in the battery module 10. In addition, in the drawings showing an embodiment of the present invention, it is noted that an example in which one battery cell is provided in each of the plurality of battery modules 10a, 10b, and 10c is illustrated.

The capacitor 20 may be connected in parallel on the main charge/discharge path of the battery pack 1 provided with the plurality of battery modules 10a, 10b, and 10c. Here, the capacitor 20 is a smoothing capacitor 20 (DC-link capacitor), and is configured to maintain a constant voltage applied to the positive terminal (P+) and the negative terminal (P-) of the battery pack 1 Can be. That is, the capacitor 20 may maintain a constant voltage applied to a load connected to the positive terminal P+ and the negative terminal P- of the battery pack 1.

In addition, the main charge/discharge path may be a high current path in which the positive terminal P+ and the negative terminal P- of the battery pack 1 are connected to each other. For example, in the embodiment of FIG. 2, the main charging/discharging path is the positive terminal (P+) of the battery pack 1, the first switching unit 110a, the first battery module 10a, and the second switching unit 110b. , The second battery module 10b, the third switching unit 110c, the third battery module 10c, and the negative terminal P- of the battery pack 1 may be connected to each other.

Referring to FIG. 2, the capacitor 20 may be connected in parallel to the positive terminal P+ and the negative terminal P- of the battery pack 1. For example, one end of the capacitor 20 may be directly connected to the positive terminal P+ of the battery pack 1, and the other end of the capacitor 20 may be directly connected to the negative terminal P- of the battery pack 1. Accordingly, the capacitor 20 may be connected in parallel with the plurality of battery modules 10a, 10b and 10c provided in the battery pack 1. That is, the capacitor 20 may be connected in parallel to the main charge/discharge path. Specifically, one end of the capacitor 20 may be connected to the positive terminal (P+) side of the battery pack 1, and the other end of the capacitor 20 may be connected to the negative terminal (P-) side of the battery pack 1 .

1 and 2, the battery management apparatus 100 may include a switching unit 110, a diode 120, and a control unit 130.

Preferably, the battery management apparatus 100 may include a plurality of switching units 110a, 110b and 110c and a plurality of diodes 120a, 120b and 120c. More preferably, the battery management apparatus 100 may include a number of switching units 110 and diodes 120 corresponding to each of the plurality of battery modules 10a, 10b and 10c provided in the battery pack 1. have. Hereinafter, for convenience of description, it will be described that the battery pack 1 includes a first battery module 10a, a second battery module 10b, and a third battery module 10c. In addition, the battery management apparatus 100 includes a first switching unit 110a, a second switching unit 110b, and a third switching unit 110c, and a first diode 120a, a second diode 120b, and It will be described that the third diode 120c is included.

The plurality of switching units 110a, 110b, and 110c may be configured to be connected in series to each of the plurality of battery modules 10a, 10b, and 10c.

Each of the plurality of switching units 110a, 110b, and 110c may be directly connected in series to the positive side or the negative side of the corresponding battery module 10 among the plurality of battery modules 10a, 10b, and 10c. Here, the corresponding battery module 10 may be one or may be plural. That is, each of the plurality of switching units 110a, 110b, and 110c may be directly connected to the corresponding one or more battery modules 10 in series.

Referring to FIG. 2, each of the plurality of switching units 110a, 110b, and 110c may be directly connected in series with a corresponding battery module among the plurality of battery modules 10a, 10b, and 10c. Specifically, the first switching unit 110a may be directly connected to the first battery module 10a. In addition, the second switching unit 110b may be directly connected to the second battery module 10b, and the third switching unit 110c may be directly connected to the third battery module 10c.

The plurality of diodes 120a, 120b, and 120c may be configured to be connected in parallel to a battery module and a switching unit corresponding to each other. Here, the diode 120 is a generally used semiconductor device and may play a role of controlling a direction in which current flows inside the battery pack 1.

Each of the plurality of diodes 120a, 120b and 120c may be connected in parallel to the corresponding battery module 10 and the switching unit 110. For example, one diode 120 may be directly connected to one battery module 10 and one switching unit 110 in parallel. Specifically, a line to which the diode 120 is connected may be directly connected in parallel to the unit line to which the battery module 10 and the switching unit 110 are connected.

Referring to FIG. 2, the first diode 120a may be directly connected to the first battery module 10a and the first switching unit 110a in parallel. In addition, the second diode 120b may be directly connected to the second battery module 10b and the second switching unit 110b in parallel. In addition, the third diode 120c may be directly connected to the third battery module 10c and the third switching unit 110c in parallel.

The plurality of diodes 120a, 120b, and 120c have a positive electrode (the anode of the diode) connected to the negative terminal side of the corresponding battery module 10, and a negative electrode (the cathode of the diode) of the corresponding battery module 10. It may be configured to be connected to the positive terminal side.

Since the diode 120 is a semiconductor device that allows current to flow in a predetermined direction, the positive side may be a cathode, and the reverse side may be an anode. Therefore, the positive electrode of the diode 120 is connected to the negative terminal of the battery module 10, and the negative electrode of the diode 120 is connected to the positive terminal of the battery module 10, so that the positive direction of the diode 120 is It may be a direction from the negative terminal side of (10) toward the positive terminal side.

For example, referring to FIG. 2, the plurality of diodes 120a, 120b, and 120c are in a direction from the negative terminal (P-) side of the battery pack 1 toward the positive terminal (P+) side of the battery pack 1 It may be included in the battery management device 100 so as to be.

The controller 130 may be configured to charge the capacitor 20 by controlling the operating states of the plurality of switching units 110a, 110b, and 110c.

For example, referring to FIG. 2, the control unit 130 is connected to the first switching unit 110a through the first control line CL1, and the second switching unit 110b through the second control line CL2. Can be connected. Also, the control unit 130 may be connected to the third switching unit 110c through the third control line CL3.

Specifically, the controller 130 may transmit a turn-on control command or a turn-off control command to each of the plurality of relays provided in the first switching unit 110a through the first control line CL1. In this case, the operating state of the relay may be controlled to correspond to a control command received from the controller 130.

For example, when the control unit 130 controls the operation state of the relays provided in the plurality of switching units 110a, 110b and 110c to a turn-on state, current output from the plurality of battery modules 10a, 10b and 10c May be applied to the capacitor 20. In this case, since the diode 120 is connected in parallel to the corresponding battery module 10 and the switching unit 110, a bypass closed circuit through the diode 120 may be formed.

Accordingly, voltages of the corresponding battery modules 10a, 10b and 10c may be applied to the plurality of switching units 110a, 110b, and 110c. Preferably, a voltage of a battery module connected together in parallel to a corresponding diode may be applied to each of the plurality of switching units 110a, 110b, and 110c.

For example, in the embodiment of FIG. 2, the control unit 130 controls all operating states of the first switching unit 110a, the second switching unit 110b, and the third switching unit 110c, so that the first battery module ( 10a), it is assumed that the second battery module 10b and the third battery module 10c and the capacitor 20 are electrically connected. In this case, a closed circuit through the third battery module 10c, the third switching unit 110c, the second diode 120b, the first diode 120a, and the capacitor 20 may be formed. In addition, a closed circuit may be formed through the second battery module 10b, the second switching unit 110b, the first diode 120a, the capacitor 20, and the third diode 120c. Finally, a closed circuit may be formed through the first battery module 10a, the first switching unit 110a, the capacitor 20, the third diode 120c, and the second diode 120b.

That is, the sum of the voltages of the first battery module 10a, the second battery module 10b, and the third battery module 10c is not applied to the first switching unit 110a, and Only voltage can be applied. That is, as a closed circuit is formed through the second diode 120b and the third diode 120c, the first switching unit 110a includes a positive terminal (P+) and a negative terminal (P-) of the battery pack 1 No potential difference is applied, and only the voltage of the first battery module 10a may be applied. Likewise, the voltage of the second battery module 10b may be applied to the second switching unit 110b, and the voltage of the third battery module 10c may be applied to the third switching unit 110c.

For example, in the embodiment of FIG. 2, it is assumed that the voltage of each of the plurality of battery modules 10a, 10b and 10c is 58.8 [V]. If the plurality of diodes 120a, 120b, and 120c are not included in the battery management apparatus 100, the first switching unit 110a includes a first battery module 10a, a second battery module 10b, and a third battery. The voltage 176.4[V] of the battery module 10c is applied, and application of a 200[V] class relay may be required. In addition, a resistor having a specification corresponding to a 200 [V] class relay may be required.

In addition, voltage 117.6[V] of the second and third battery modules 10b and 10c is applied to the second switching unit 110b, and application of a 150[V] class relay may be required. In addition, a resistance having a specification corresponding to a 150[V] class relay may be required.

In addition, a voltage of 58.8 [V] of the third battery module 10c is applied to the third switching unit 110c, and application of a 100 [V] class relay may be required. In addition, a resistance having a specification corresponding to a 100 [V] class relay may be required.

On the other hand, as in the embodiment of FIG. 2, in the case where the plurality of diodes 120a, 120b, and 120c are included in the battery management apparatus 100, the voltage of each of the plurality of battery modules 10a, 10b and 10c is 58.8. Assume [V]. In this case, since 58.5 [V] is applied to each of the first switching unit 110a, the second switching unit 110b, and the third switching unit 110c, the first switching unit 110a and the second switching unit ( 110b) and the third switching unit 110c may be required to apply a 100 [V] class relay.

Accordingly, the battery management apparatus 100 according to an embodiment of the present invention includes a plurality of diodes 120a, 120b, and 120c for forming a closed circuit, thereby setting the required specifications of each component of the switching unit connected to the high potential side. There is an advantage that can be lowered. Accordingly, the need to secure a large space for arranging a large-capacity resistor and a large-current relay is reduced, so that the space of the battery management apparatus 100 and the battery pack 1 can be efficiently used.

In addition, the price of resistors and relays is inevitably increased as the specifications increase. Accordingly, since the battery management apparatus 100 can lower the required specifications of each component of the switching unit 110, the production cost of the battery management apparatus 100 can be reduced.

Accordingly, the battery pack 1 including the battery management apparatus 100 according to an embodiment of the present invention has high output power and can be simplified in size. In addition, there is an advantage that the production cost of the battery pack 1 can be reduced.

Meanwhile, the controller 130 provided in the battery management apparatus 100 includes a processor known in the art, an application-specific integrated circuit (ASIC), another chipset, a logic circuit, and a register to execute various control logics performed in the present invention. , A communication modem, a data processing device, and the like may be optionally included. In addition, when the control logic is implemented in software, the control unit 130 may be implemented as a set of program modules. In this case, the program module may be stored in a memory and executed by the controller 130. The memory may be inside or outside the controller 130, and may be connected to the controller 130 by various well-known means.

The plurality of switching units 110a, 110b and 110c may include main relays 111a, 111b and 111c, precharge relays 112a, 112b and 112c, and precharge resistors 113a, 113b and 113c, respectively. have.

The main relays 111a, 111b and 111c may be disposed on the main charge/discharge path.

That is, the battery modules 10a, 10b, and 10c corresponding to the operating states of the main relays 111a, 111b, and 111c may be electrically connected to the main charging/discharging path of the battery pack 1. Specifically, when the operation state of the main relays 111a, 111b and 111c is a turn-on state, a corresponding battery module among the plurality of battery modules 10a, 10b and 10c may be electrically connected to the battery pack 1. have.

For example, referring to FIG. 2, the first switching unit 110a may include a first main relay 111a, and the second switching unit 110b may include a second main relay 111b. In addition, the third switching unit 110c may include a third main relay 111c. When the operation state of the first main relay 111a is a turn-on state, the first battery module 10a may be electrically connected to the main charge/discharge path. Similarly, when the operation state of the second main relay 111b and the third main relay 111c is turned on, the second battery module 10b and the third battery module 10c are electrically connected to the main charge/discharge path. Can be connected.

The precharge relays 112a, 112b and 112c and the precharge resistors 113a, 113b and 113c may be connected in parallel with the main relays 111a, 111b and 111c.

Specifically, the precharge relays 112a, 112b, and 112c may be disposed on a precharge path connected in parallel to the main charge/discharge path. Further, the precharge resistors 113a, 113b, and 113c may be disposed on the precharge path and connected in series with the corresponding precharge relays 112a, 112b, and 112c.

For example, referring to FIG. 2, a connection relationship between the first precharge relay 112a, the first precharge resistor 113a, and the first main relay 111a included in the first switching unit 110a will be described. One end of the precharge relay 112a may be directly connected to one end of the first main relay 111a. In addition, the other end of the first precharge relay 112a is directly connected in series with one end of the first precharge resistor 113a, and the other end of the first precharge resistor 113a is the other end of the first main relay 111a. Can be directly connected to.

In addition, the second precharge relay 112b and the second precharge resistor 113b included in the second switching unit 110b may be connected to the second main relay 111b in parallel. In addition, the third precharge relay 112c and the third precharge resistor 113c included in the third switching unit 110c may be connected to the third main relay 111c in parallel.

The control unit 130 may be configured to control the operating states of the precharge relays 112a, 112b, and 112c. Specifically, the control unit 130 is electrically connected to the plurality of precharge relays 112a, 112b and 112c through a line, and provides a control command for controlling the operation state of the plurality of precharge relays 112a, 112b and 112c. It can be output on the above line. Each of the plurality of precharge relays 112a, 112b, and 112c may receive a control command output from the control unit 130, and an operation state may be switched to correspond to the received control command.

For example, in the embodiment of FIG. 2, the control unit 130 may be connected to the first switching unit 110a through the first control line CL1. In addition, the control unit 130 may be connected to the second switching unit 110b through the second control line CL2 and may be connected to the third switching unit 110c through the third control line CL3. In addition, the control unit 130 outputs a control command to each of the first control line CL1, the second control line CL2, and the third control line CL3, The operation states of each of the charge relay 112b and the third precharge relay 112c may be controlled.

In addition, the control unit 130 may also control the operating states of the main relays 111a, 111b and 111c included in the switching unit 110. For example, in the embodiment of FIG. 2, the control unit 130 outputs a control command to each of the first control line CL1, the second control line CL2, and the third control line CL3, so that the first main relay ( 111a), the second main relay 111b, and the third main relay 111c may each control operating states.

The controller 130 may be configured to turn on and off a connection between the plurality of battery modules 10a, 10b, and 10c and the main charge/discharge path.

In the embodiment of FIG. 2, when the operation state of the first precharge relay 112a is controlled to be turned on by the control unit 130, the connection between the first battery module 10a and the main charge/discharge path is turned ON. I can. Conversely, when the operation state of the first precharge relay 112a is controlled to be turned off by the controller 130, the connection between the first battery module 10a and the main charge/discharge path may be turned off. In addition, when the battery module is connected to the main charge/discharge path, since current flows from the battery module connected to the main charge/discharge path to the capacitor 20, the capacitor 20 may be charged (precharged).

For example, it is assumed that the capacitor 20 is not yet precharged. In this case, when the load is connected to the positive terminal (P+) and the negative terminal (P-) of the battery pack 1, and at least one of the plurality of battery modules 10a, 10b and 10c is connected to the main charge/discharge path, Inrush current may flow to the load side. Accordingly, the controller 130 may first precharge the capacitor 20 by controlling the operating states of the plurality of switching units 110a, 110b, and 110c. Preferably, the control unit 130 controls the operating states of the plurality of precharge relays 112a, 112b and 112c included in the plurality of switching units 110a, 110b and 110c, thereby precharging the capacitor 20. I can.

The battery management apparatus 100 according to an embodiment of the present invention has the advantage of being able to precharge the capacitor 20 by controlling the operating states of each of the plurality of precharge relays 112a, 112b, and 112c.

In addition, the battery management apparatus 100 has an advantage of being able to significantly reduce the required specifications of the relay and resistance included in the switching unit 110 corresponding to each of the plurality of battery modules 10a, 10b, and 10c.

For example, in the embodiment of FIG. 2, the battery management apparatus 100 includes a first main relay 111a, a first precharge relay 112a, and a first precharge resistor 113a provided in the first switching unit 110a. ) Can be lowered. In addition, the battery management device 100 can lower the required specifications of the second main relay 111b, the second precharge relay 112b, and the second precharge resistor 113b provided in the second switching unit 110b. have. In addition, the battery management device 100 can lower the required specifications of the third main relay 111c, the third precharge relay 112c, and the third precharge resistor 113c provided in the third switching unit 110c. have.

The plurality of switching units 110a, 110b, and 110c may be configured such that one end is connected to one end of a corresponding battery module among the plurality of battery modules 10a, 10b, and 10c, respectively. That is, one end of each of the plurality of switching units 110a, 110b, and 110c may be directly connected to a positive terminal or a negative terminal of a corresponding battery module.

For example, referring to FIG. 2, one end of each of the plurality of switching units 110a, 110b, and 110c may be directly connected to the positive terminal of the corresponding battery modules 10a, 10b, and 10c.

Further, the plurality of switching units 110a, 110b, and 110c may be configured such that the other end is connected to one end of a corresponding diode among the plurality of diodes 120a, 120b, and 120c, respectively. That is, the other end of each of the plurality of switching units 110a, 110b and 110c may be directly connected to the anode side or the cathode side of the corresponding diode.

For example, referring to FIG. 2, the other end of each of the plurality of switching units 110a, 110b, and 110c may be directly connected to the cathode side of the corresponding diodes 120a, 120b, and 120c.

The plurality of diodes 120a, 120b, and 120c may be configured such that the other end is connected to the other end of a corresponding battery module among the plurality of battery modules 10a, 10b, and 10c. That is, one end of each of the plurality of diodes 120a, 120b, and 120c may be directly connected to a corresponding switching unit, and the other end may be directly connected to a corresponding battery module.

For example, referring to FIG. 2, one end of each of the plurality of diodes 120a, 120b, and 120c may be directly connected to a corresponding switching unit among the plurality of switching units 110a, 110b, and 110c. Further, the other end of each of the plurality of diodes 120a, 120b, and 120c may be directly connected to a negative terminal of a corresponding battery module among the plurality of battery modules 10a, 10b, and 10c.

That is, the battery module 10 and the corresponding switching unit 110 may be directly connected to each other in series, and the diode 120 may be directly connected to the corresponding battery module 10 and the switching unit 110 in parallel.

Accordingly, the battery management apparatus 100 according to an embodiment of the present invention includes a corresponding battery module 10 and a diode 120 connected in parallel to the corresponding switching unit 110, and thus a plurality of switching units 110a , 110b and 110c) can be lowered. Accordingly, while maintaining the output voltage of the battery pack 1, the main relays 111a, 111b and 111c included in the plurality of switching units 110a, 110b and 110c, the precharge relays 112a, 112b and 112c, and free There is an advantage in that the required specifications of the charge resistors 113a, 113b and 113c can be lowered.

The control unit 130 sequentially controls the operating states of the precharge relays 112a, 112b and 112c included in each of the plurality of switching units 110a, 110b and 110c to a turn-on state according to a predetermined condition. Thus, it may be configured to charge the capacitor 20.

Here, the predetermined condition is a condition in which each of the plurality of switching units 110a, 110b and 110c can be selected by the controller 130, for example, the temperature of the corresponding battery modules 10a, 10b and 10c, and the battery module It may be a voltage of (10a, 10b, and 10c) or a condition according to the state control history of each of the plurality of precharge relays 112a, 112b and 112c. An embodiment in which the controller 130 first selects a precharge relay to control an operating state according to a predetermined condition will be described in detail later.

The control unit 130 may select at least one switching unit according to a predetermined condition from among the plurality of switching units 110a, 110b, and 110c, and control the operation state of the precharge relay included in the selected switching unit to a turn-on state. have. Preferably, the control unit 130 may select one switching unit according to a predetermined condition from among the plurality of switching units 110a, 110b, and 110c.

3 is a diagram illustrating a first operation configuration of the battery pack 1 including the battery management apparatus 100 according to an embodiment of the present invention. Specifically, FIG. 3 is an example in which the control unit 130 controls the operation state of the third precharge relay 112c to a turn-on state.

4 is a diagram showing a second operation configuration of the battery pack 1 including the battery management apparatus 100 according to an embodiment of the present invention. Specifically, FIG. 4 is an example in which the control unit 130 controls the operation states of the second precharge relay 112b and the third precharge relay 112c to a turn-on state.

5 is a diagram showing a third operation configuration of the battery pack 1 including the battery management apparatus 100 according to an embodiment of the present invention. Specifically, FIG. 5 is an example in which the control unit 130 controls the operation states of the first precharge relay 112a, the second precharge relay 112b, and the third precharge relay 112c to a turn-on state. .

Arrows illustrated in FIGS. 3 to 5 may be a flow of current output from at least one of the first battery module 10a, the second battery module 10b, and the third battery module 10c.

For example, referring to FIGS. 3 to 5, a first operation configuration, a second operation configuration, and a third operation configuration may be operated over time. That is, the control unit 130 first controls the operation state of the third precharge relay 112c to a turn-on state according to a predetermined condition, and the second precharge relay 112b and the first precharge relay 112a ) Can be sequentially controlled to turn-on state.

In this case, as shown in FIG. 3, the capacitor 20 may be precharged first by the current output from the third battery module 10c. In addition, as shown in FIG. 4, the capacitor 20 may be precharged by the current output from the second battery module 10b and the third battery module 10c. Finally, as shown in FIG. 5, the capacitor 20 may be precharged by the current output from the first battery module 10a, the second battery module 10b, and the third battery module 10c. .

However, unlike FIGS. 3 to 5, the controller 130 may first control the operation state of the first precharge relay 112a or the second precharge relay 112b to a turn-on state.

Accordingly, since the battery management apparatus 100 according to an embodiment of the present invention can select a precharge relay to control an operating state according to a predetermined condition, the capacitor 20 is adjusted in consideration of the state of the corresponding battery module. It can be precharged.

1 and 2, the battery management apparatus 100 according to an embodiment of the present invention may further include a voltage measurement unit 140.

The voltage measurement unit 140 may measure voltages of each of the plurality of battery modules 10a, 10b, and 10c by measuring potentials of both ends of the plurality of battery modules 10a, 10b, and 10c. Here, the voltages of the battery modules 10a, 10b, and 10c measured by the voltage measurement unit 140 may be an open-circuit voltage (OCV).

For example, referring to FIG. 2, the voltage measurement unit 140 measures the potential of both ends of the first battery module 10a through the first sensing line SL1 and the second sensing line SL2, and measures the measured potential of both ends. It is possible to measure the voltage of the first battery module 10a by obtaining the difference of. In addition, the voltage measurement unit 140 measures the potential of both ends of the second battery module 10b through the third sensing line SL3 and the fourth sensing line SL4, and obtains a difference between the measured potentials of the second battery module. The voltage of the battery module 10b can be measured. In addition, the voltage measurement unit 140 measures the potential of both ends of the third battery module 10c through the fifth sensing line SL5 and the sixth sensing line SL6, and obtains a difference between the measured potentials of the third battery module. The voltage of the battery module 10c can be measured.

In addition, the voltage measurement unit 140 may be configured to transmit a measurement result to the control unit 130.

The voltage measurement unit 140 and the control unit 130 may be connected to each other by wire or wirelessly. Preferably, the voltage measurement unit 140 may be connected to the control unit 130 through a wired line. The voltage measurement unit 140 may transmit a measurement result to the control unit 130 through the wired line.

For example, the voltage measurement unit 140 is a measurement result of the voltage of the first battery module 10a, a measurement result of the voltage of the second battery module 10b, and a measurement result of the voltage of the third battery module 10c May be transmitted to the controller 130.

The control unit 130 may be configured to receive the measurement result from the voltage measurement unit 140.

For example, the controller 130 may receive a signal input through a wired line connected to the voltage measurement unit 140 and read the received signal to obtain a measurement result measured by the voltage measurement unit 140.

In addition, the controller 130 may be configured to set a sequence number of a precharge relay to control the operation state among the plurality of precharge relays 112a, 112b and 112c based on the received measurement result.

For example, the controller 130 may set the priority of the operation state control high for the precharge relay corresponding to the battery module having the highest voltage.

Since the voltage (open voltage) of the battery module has a one-to-one relationship with the state of charge (SOC) of the battery module, the control unit 130 is measured by the voltage measurement unit 140 among the plurality of battery modules 10a, 10b and 10c. It can be estimated that the higher the applied voltage, the higher the state of charge. Therefore, the control unit 130 sets the order of each of the plurality of precharge relays 112a, 112b and 112c based on the voltages of the plurality of battery modules 10a, 10b, and 10c, so that the voltage of the corresponding battery module is large. In order, the priority of the operation state control for the precharge relay can be set high.

For example, in the embodiments of FIGS. 3 to 5, it is assumed that the voltage of the first battery module 10a is measured to be the smallest and the voltage of the third battery module 10c is measured to be the largest. In this case, the controller 130 sets the sequence number of the third precharge relay 112c to 1, sets the sequence number of the second precharge relay 112b to 2, and sets the sequence number of the second precharge relay 112b to 2, according to the voltage of the corresponding battery module. 1 The sequence number of the precharge relay 112a can be set to 3.

The control unit 130 may be configured to sequentially control the operation states of the plurality of precharge relays according to a set order. That is, the controller 130 may control the operation states of the plurality of precharge relays 112a, 112b, and 112c to a turn-on state according to the set order.

For example, as in the previous embodiment, the controller 130 sets the order of the third precharge relay 112c to 1, the order of the second precharge relay 112b to 2, and the first precharge relay Assume that the sequence number of (112a) is set to 3. In order to precharge the capacitor 20, the controller 130 first controls the operation state of the third precharge relay 112c to a turn-on state, and then turns the operation state of the second precharge relay 112b. -Can be controlled in the ON state. After that, the controller 130 may control the operation state of the first precharge relay 112a to a turn-on state. In this case, as shown in FIGS. 3 to 5, the capacitor 20 may be precharged.

In addition, since the control unit 130 sets a sequence number to control the operation state of the precharge relay according to the voltage of the battery module 10, the capacitor 20 is precharged and a plurality of battery modules 10a, 10b, and 10c) can be balanced.

Therefore, the battery management apparatus 100 according to an embodiment of the present invention performs the precharge of the capacitor 20 and the balancing of the battery module 10 at the same time, thereby further improving the stability of the battery pack 1. There is an advantage. In addition, the battery management apparatus 100 extends the lifespan of the plurality of battery modules 10a, 10b and 10c by solving the imbalance in the state of charge between the plurality of battery modules 10a, 10b and 10c, and There is an advantage of improving the performance efficiency of the modules 10a, 10b and 10c.

1 and 2, the battery management apparatus 100 according to an embodiment of the present invention may further include a temperature measuring unit 150.

The temperature measuring unit 150 may be configured to measure the temperature of each of the plurality of battery modules 10a, 10b, and 10c. For example, the temperature measuring unit 150 may be provided with a general temperature sensor to measure the temperature of each of the plurality of battery modules 10a, 10b, and 10c.

Referring to FIG. 2, the temperature measuring unit 150 measures the temperature of the first battery module 10a through the seventh sensing line SL7, and the second battery module 10b through the eighth sensing line SL8. ) Can measure the temperature. In addition, the temperature measuring unit 150 may measure the temperature of the third battery module 10c through the ninth sensing line SL9.

In addition, the temperature measurement unit 150 may be configured to transmit a measurement result to the control unit 130.

Like the voltage measurement unit 140, the temperature measurement unit 150 may be connected to the controller 130 by wire or wirelessly, and may transmit a measurement result to the controller 130. Preferably, the temperature measurement unit 150 and the control unit 130 may be connected to each other through a wired line.

For example, referring to FIG. 2, the temperature measurement unit 150 may be connected to the control unit 130 through the A line. In addition, the temperature measurement unit 150 may transmit a measurement result obtained by measuring the temperature of each of the plurality of battery modules 10a, 10b, and 10c to the controller 130 through line A.

The control unit 130 may be configured to receive the measurement result from the temperature measurement unit 150.

In addition, the controller 130 may be configured to set a sequence number of a precharge relay to control the operation state among the plurality of precharge relays 112a, 112b and 112c based on the received measurement result.

For example, the control unit 130 may set the priority of the operation state control high for the precharge relay having the largest temperature of the corresponding battery module 10. That is, the above-described predetermined condition may be a condition set such that a higher priority is set as the temperature of the corresponding battery module 10 increases.

In general, when the battery pack 1 is provided in a product, precharge may be performed in the preparation stage for driving the product. That is, before the battery module 10 provided in the battery pack 1 is discharged and the product is driven in earnest, precharge may be performed first.

Before the precharge of the capacitor 20 is performed, if the temperature of the battery module 10 is high, the controller 130 may determine that the internal energy of the corresponding battery module 10 is high. Accordingly, in order to lower the internal energy of the battery module 10 having a high temperature, the control unit 130 may set a high priority of controlling the operation state of the precharge relay corresponding to the battery module 10 having a high temperature.

For example, in the embodiments of FIGS. 3 to 5, it is assumed that the temperature of the first battery module 10a is measured to be the lowest and the temperature of the third battery module 10c is measured to be the highest. In this case, the controller 130 sets the sequence number of the third precharge relay 112c to 1, sets the sequence number of the second precharge relay 112b to 2, and sets the sequence number of the second precharge relay 112b to 2, according to the temperature of the corresponding battery module. 1 The sequence number of the precharge relay 112a can be set to 3.

In addition, the controller 130 may be configured to sequentially control the operation states of the plurality of precharge relays 112a, 112b, and 112c according to a set order.

The controller 130 may control an operation state starting from a precharge relay having a fast set order. That is, the control unit 130 may control the operation state from a precharge relay having a high priority for operation state control.

For example, the controller 130 sets the order of the third precharge relay 112c to 1, the order of the second precharge relay 112b to 2, and the order of the first precharge relay 112a Assume that it is set to 3. 3 to 5, the operation state of the third precharge relay 112c is first controlled to a turn-on state, followed by the second precharge relay 112b and the first precharge relay 112a. The operating state can be controlled as a turn-on state.

Accordingly, the battery management apparatus 100 according to an embodiment of the present invention has an advantage of improving the stability of the battery module by first controlling the operating state of the precharge relay corresponding to the battery module having a high measured temperature. .

1 and 2, the battery management apparatus 100 according to an embodiment of the present invention may further include a storage unit 160. Here, the storage unit 160 may store data required for each component of the battery management apparatus 100 to perform an operation or function, a program, or data generated in a process of performing the operation and function. If the storage unit 160 is a known information storage means known to be capable of recording, erasing, updating, and reading data, there is no particular limitation on its type. As an example, the information storage means may include RAM, flash memory, ROM, EEPROM, register, and the like. In addition, the storage unit 160 may store program codes in which processes executable by the control unit 130 are defined.

When the capacitor 20 is charged, the storage unit 160 may be configured to store a state control history, which is sequential information in which operation states of the plurality of precharge relays 112a, 112b, and 112c are controlled.

Here, the state control history may mean sequential information in which the plurality of precharge relays 112a, 112b, and 112c included in the plurality of switching units 110a, 110b, and 110c are controlled in a turn-on state. The state control history will be described with reference to FIG. 6.

6 is a diagram illustrating an example of a state control history stored in the battery management apparatus 100 according to an embodiment of the present invention.

Referring to FIG. 6, in the first precharge process for the capacitor 20, the first precharge relay 112a, the second precharge relay 112b, and the third precharge relay 112c are sequentially operated. Was controlled. In the second precharge process for the capacitor 20, operating states of the first precharge relay 112a, the second precharge relay 112b, and the third precharge relay 112c were simultaneously controlled. In the third precharge process for the capacitor 20, the first precharge relay 112a, the second precharge relay 112b, and the third precharge relay 112c were controlled in order.

The storage unit 160 may store a sum of sequential information in which operation states of the plurality of precharge relays 112a, 112b, and 112c are controlled. That is, the sequential information of the first precharge relay 112a stored in the storage unit 160 is 3, the sequential information of the second precharge relay 112b is 5, and the sequential information of the third precharge relay 112c Can be 7.

The control unit 130 may set a sequence number of a precharge relay to control the operation state among the plurality of precharge relays 112a, 112b and 112c, based on the state control history stored in the storage unit 160. Can be configured.

Specifically, the control unit 130 determines the operation state based on the state control history stored in the storage unit 160 in order to equalize the order in which the operation states of each of the plurality of precharge relays 112a, 112b, and 112c are controlled. You can set the sequence number of the precharge relay to be controlled.

For example, referring to FIG. 6, in the fourth precharge process, the controller 130 sets the order of the third precharge relay 112c to 1 and the order of the second precharge relay 112b to 2 And, the sequence number of the first precharge relay 112a may be set to 3.

The controller 130 may be configured to sequentially control the operating states of the plurality of precharge relays 112a, 112b, and 112c according to a set order.

For example, when an inrush current flows when the precharge relay is switched to the turn-on state, an overcurrent flows to the precharge relay momentarily, and the precharge relay may be damaged. That is, if the order of controlling the operation state of the plurality of precharge relays 112a, 112b, and 112c is not variable and is fixed, the precharge relay that is first switched to the turn-on state is converted to the turn-on state last. The damage may be more severe than the precharge relay.

Accordingly, the battery management apparatus 100 according to an embodiment of the present invention includes a plurality of precharge relays 112a, 112b and 112c based on the state control history of the stored plurality of precharge relays 112a, 112b and 112c. By uniformly controlling the order of switching the operating state of the device, it is possible to prevent damage from being concentrated on a specific precharge relay. Therefore, since the states of the plurality of precharge relays 112a, 112b and 112c can be equally maintained, the number of damage and malfunction of the plurality of precharge relays 112a, 112b and 112c can be effectively reduced. have.

The control unit 130 controls each of the plurality of precharge relays 112a, 112b and 112c included in the plurality of switching units 110a, 110b and 110c to a turn-on state with reference to the state control history. It may be configured to obtain sequential information.

For example, referring to FIG. 6, the control unit 130 may obtain sequential information stored in the storage unit 160. The obtained sequential information may be 3 for the first precharge relay 112a, 5 for the second precharge relay 112b, and 7 for the third precharge relay 112c.

The controller 130 may be configured to set the order of the plurality of precharge relays 112a, 112b, and 112c based on a result of sorting the obtained sequential information.

For example, referring to FIG. 6, based on the acquired sequential information, the control unit 130 determines the number of times that the first precharge relay 112a is first controlled to be turned on is the second precharge relay 112b and It may be determined that the number of times that the third precharge relay 112c is first controlled in the turn-on state is greater. In addition, based on the acquired sequential information, the control unit 130 determines the number of times that the third precharge relay 112c is first controlled to be turned on is the first precharge relay 112a and the second precharge relay ( It may be determined that 112b) is less than the number of times that the first turn-on state is controlled.

Therefore, in the fourth precharge process, the control unit 130 sequentially controls the operation state in the order of the third precharge relay 112c, the second precharge relay 112b, and the first precharge relay 112a. Can be set.

Through this, the battery management apparatus 100 according to an embodiment of the present invention has an advantage of being able to maintain the states of the plurality of precharge relays 112a, 112b, and 112c equally. Accordingly, the lifespan of the plurality of precharge relays 112a, 112b, and 112c may be increased.

The controller 130 controls the operation states of the plurality of precharge relays 112a, 112b and 112c included in the plurality of switching units 110a, 110b and 110c to a turn-on state at the same time, so that the capacitor ( 20) can be configured to charge.

Specifically, as shown in FIG. 5, the operation states of the first precharge relay 112a, the second precharge relay 112b, and the third precharge relay 112c are simultaneously turned by the control unit 130- It can be controlled in the on state. Here, the turn-on control command output from the controller 130 passes through the first control line CL1, the second control line CL2, and the third control line CL3, and the first precharge relay 112a , It is assumed that the time to reach each of the second precharge relay 112b and the third precharge relay 112c is the same.

Referring to FIG. 5, when the control unit 130 controls the operation states of each of the first precharge relay 112a, the second precharge relay 112b, and the third precharge relay 112c to a turn-on state. , Current output from the first battery module 10a, the second battery module 10b, and the third battery module 10c may flow to the capacitor 20 through the main charge/discharge path. Thus, the capacitor 20 can be charged.

Preferably, the current output from the first battery module 10a is the first battery module 10a, the first switching unit 110a, the capacitor 20, the third diode 120c, and the second diode 120b. ) Can flow through a closed circuit. In addition, the current output from the second battery module 10b is the second battery module 10b, the second switching unit 110b, the first diode 120a, the capacitor 20, and the third diode 120c. It can flow through a closed circuit formed by In addition, the current output from the third battery module 10c is the third battery module 10c, the third switching unit 110c, the second diode 120b, the first diode 120a, and the capacitor 20 It can flow through a closed circuit formed by

That is, since the closed circuit is formed by the plurality of diodes 120a, 120b, and 120c, the operating states of the first precharge relay 112a, the second precharge relay 112b, and the third precharge relay 112c are Even when switched to the turn-on state at the same time, the voltage applied to each of the first precharge relay 112a, the second precharge relay 112b, and the third precharge relay 112c is the corresponding battery module 10 It can be equal to the voltage of

For example, assuming that the voltages of the first battery module 10a, the second battery module 10b, and the third battery module 10c are 58.5[V], the first precharge relay 112a and the second precharge relay The voltage applied to 112b and the third precharge relay 112c may be the same as 58.5 [V].

Accordingly, the request of the main relays 111a, 111b and 111c, the precharge relays 112a, 112b and 112c, and the precharge resistors 113a, 113b and 113c included in each of the plurality of switching units 110a, 110b and 110c Specifications can be lowered. In addition, since the first precharge relay 112a, the second precharge relay 112b, and the third precharge relay 112c are controlled to be turned on at the same time, the charging of the capacitor 20 will proceed more quickly. There is an advantage to be able to.

The battery management apparatus 100 according to the present invention can be applied to a battery management system (BMS). That is, the BMS according to the present invention may include the battery management apparatus 100 described above. In this configuration, at least some of the components of the battery management apparatus 100 may be implemented by supplementing or adding functions of the configuration included in the conventional BMS. For example, the switching unit, the diode, the control unit 130, the voltage measurement unit 140, the temperature measurement unit 150, and the storage unit 160 may be implemented as components of the BMS.

In addition, the battery management apparatus 100 according to the present invention may be provided in the battery pack 1. That is, the battery pack 1 according to the present invention may include the above-described battery management apparatus 100 and one or more battery cells. In addition, the battery pack 1 may further include electrical equipment (relay, fuse, etc.) and a case.

The embodiments of the present invention described above are not implemented only through an apparatus and a method, but may be implemented through a program that realizes a function corresponding to the configuration of the embodiment of the present invention or a recording medium in which the program is recorded. Implementation can be easily implemented by an expert in the technical field to which the present invention belongs from the description of the above-described embodiment.

In the above, although the present invention has been described by limited embodiments and drawings, the present invention is not limited thereto, and the technical idea of the present invention and the following will be described by those of ordinary skill in the art to which the present invention pertains. It goes without saying that various modifications and variations are possible within the equal scope of the claims.

In addition, the present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention to those of ordinary skill in the technical field to which the present invention belongs. It is not limited by the drawings, and may be configured by selectively combining all or part of each of the embodiments so that various modifications may be made.

1: battery pack
10: battery module
20: capacitor
100: battery management device
110: switching unit
120: diode
130: control unit
140: voltage measurement unit
150: temperature measurement unit
160: storage unit

Claims (11)

In the battery management apparatus for charging capacitors connected in parallel on a main charge/discharge path of a battery pack equipped with a plurality of battery modules,
A plurality of switching units configured to be connected in series with respect to each of the plurality of battery modules;
A plurality of diodes connected in parallel to the corresponding battery module and the switching unit, a positive electrode connected to a negative terminal side of the corresponding battery module, and a negative electrode connected to a positive terminal side of the corresponding battery module; And
And a control unit configured to charge the capacitor by controlling the operation states of the plurality of switching units.
The method of claim 1,
The plurality of switching units,
A main relay disposed on the main charge/discharge path; A precharge relay disposed on a precharge path connected in parallel to the main charge/discharge path; And a precharge resistor disposed on the precharge path and connected in series with the precharge relay,
The control unit,
And controlling an operation state of the precharge relay to turn on and off connections between the plurality of battery modules and the main charge/discharge path.
The method of claim 2,
The plurality of switching units,
One end is connected to one end of a corresponding battery module among the plurality of battery modules, and the other end is configured to be connected to one end of a corresponding diode among the plurality of diodes,
The plurality of diodes,
The battery management apparatus, characterized in that the other end is configured to be connected to the other end of a corresponding battery module among the plurality of battery modules.
The method of claim 2,
The control unit,
And charging the capacitor by simultaneously controlling operation states of a plurality of precharge relays included in the plurality of switching units to a turn-on state.
The method of claim 2,
The control unit,
And charging the capacitor by sequentially controlling the operation states of the plurality of precharge relays included in the plurality of switching units to a turn-on state according to a predetermined condition.
The method of claim 5,
Further comprising a voltage measuring unit configured to measure the voltage of each of the plurality of battery modules and transmit the measurement result to the control unit,
The control unit,
Receives the measurement result from the voltage measurement unit, sets a sequence number of a precharge relay to control the operation state among the plurality of precharge relays based on the received measurement result, and sets the plurality of precharge relays according to the set sequence number. Battery management device, characterized in that configured to sequentially control the operating state of the relay.
The method of claim 5,
Further comprising a temperature measuring unit configured to measure the temperature of each of the plurality of battery modules and transmit the measurement result to the control unit,
The control unit,
Receives the measurement result from the temperature measurement unit, sets a sequence number of a precharge relay to control the operation state among the plurality of precharge relays based on the received measurement result, and sets the plurality of precharge relays according to the set sequence number. Battery management device, characterized in that configured to sequentially control the operating state of the relay.
The method of claim 5,
When the capacitor is charged, further comprising a storage unit configured to store a state control history, which is sequential information in which operation states of the plurality of precharge relays are controlled,
The control unit,
Based on the state control history stored in the storage unit, the order of the precharge relays to control the operation state among the plurality of precharge relays is set, and the operation states of the plurality of precharge relays are sequentially set according to the set order. Battery management device, characterized in that configured to control.
The method of claim 8,
The control unit,
Each of the precharge relays included in the plurality of switching units obtains sequential information controlled in a turn-on state with reference to the state control history, and the plurality of precharge relays based on a result of sorting the obtained sequential information Battery management device, characterized in that configured to set the sequence number of.
A BMS comprising a battery management device according to any one of claims 1 to 9.
A battery pack comprising the battery management device according to any one of claims 1 to 9.

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