KR102179679B1 - Method and apparatus for limiting maximum in/out current through connected state of battery module - Google Patents

Abstract

The present invention relates to a method and apparatus for limiting maximum input/output power according to the connection state of a battery module, and more specifically, a connection confirmation signal generated by a connection confirmation signal generator of an RBMS is used to check and confirm the connection state of a battery module. The present invention relates to a method and apparatus for limiting the maximum allowable input/output power by a battery pack according to the connected state.

Description

Method and device for limiting the maximum input/output power according to the connection status of the battery module {METHOD AND APPARATUS FOR LIMITING MAXIMUM IN/OUT CURRENT THROUGH CONNECTED STATE OF BATTERY MODULE}

The present invention relates to a method and apparatus for limiting maximum input/output power according to the connection state of a battery module, and more specifically, a connection confirmation signal generated by a connection confirmation signal generator of an RBMS is used to check and confirm the connection state of a battery module. The present invention relates to a method and apparatus for limiting the maximum allowable input/output power by a battery pack according to the connected state.

In general, battery modules having one or more battery cells are electrically configured in a serial/parallel manner with each other, and a battery pack including one or more battery modules monitors and controls the state of the battery pack.Rack Battery Management System (RBMS) ). In addition, each battery module is configured to include a Module Battery Management System (MBMS) that controls the corresponding battery module.

Meanwhile, in the battery pack, battery modules may be connected in series to produce high output, and battery modules may be connected in parallel to increase energy capacity or use time.

If the connection of some battery modules of a battery pack used by connecting battery modules in series or in parallel is poor, the use efficiency of the battery pack is reduced, and the reliability of the battery pack is affected.

In order to solve this problem, it is necessary to check the connection status of each battery module and determine whether the connection status of each battery module is bad.

Meanwhile, the conventional method of checking the connection status of the battery modules is to measure the module voltage of each battery module and the pack voltage of the battery pack, and compare the sum of the measured pack voltage and each module voltage to check the connection status of the battery module. Was used.

However, this method was possible only when the connection structure of the battery modules was in series, and when the connection structure was parallel, a new connection status check method was required.

In addition, if some battery modules are defective in a series-connected battery module, the total voltage is reduced, which greatly affects the driving of the battery pack, but the battery modules connected in parallel do not change the total voltage even if some battery modules are defective. If the additional method was performed, the efficiency of the battery pack was reduced, but continuous operation was possible.

If the additional method is not performed, if some battery modules have a poor connection state, a problem occurs in that the amount of power that can be accommodated by the entire battery pack decreases. In addition, in such a case, since the preset maximum input/output power limit is constant, overcharge and overdischarge occur because input/output exceeding the allowable maximum input/output power of a battery pack composed of battery modules that are actually normally connected is not restricted. There is a problem that the battery pack is damaged.

KR 2014-0062574 A

The present invention checks the connection status of the battery modules connected in parallel for measuring the same voltage regardless of the connection status of the battery module in a new way, not the conventional voltage measurement method, and limits the maximum input/output power according to the checked connection status. It provides a method and apparatus for preventing damage to a battery pack and enabling continuous operation.

In an embodiment of the present invention, a method of limiting maximum input/output power according to a connection state of a battery module is a method of limiting maximum input/output power of a battery pack in which two or more battery modules are connected in parallel, a connection for checking whether the connection state of each battery module is normal. And a state checking step and a maximum input/output power limiting step of limiting the maximum allowable input/output power by the battery pack based on the connection state of the battery module.

The connection status check step includes a connection check signal generation step in which the RBMS of the battery pack generates a connection check signal, a connection check signal transmission step of transmitting the generated connection check signal to each battery module, and each battery module sends the connection check signal Upon receiving the connection confirmation signal transmitted from the transmitting step, a response signal is generated and transmitted to the RBMS by generating a response signal immediately, and the RBMS determines the connection status of the battery module according to whether or not the response signal is received for a predetermined time. It includes a step of determining the connection state to determine.

The response signal includes ID information of the corresponding battery module.

In the step of limiting the maximum input/output power, a step of calculating the number of battery modules whose connection state is determined to be normal in the step of determining the connection state, and a normal connected battery calculated in the step of calculating the number of normally connected battery modules Battery module count comparison step for comparing the number of modules with the total number of battery modules, a maximum input/output power limit value calculation step for calculating a maximum input/output power limit value based on the number of normally connected battery modules, and the maximum input/output power limit value calculation step And a maximum input/output power limit value setting step of updating and setting the maximum input/output power limit value calculated in the RBMS.

The input/output power limit value calculation step is calculated by multiplying the number of normally connected battery modules by a preset maximum input/output power limit value and dividing by the total number of previously stored battery modules.

Meanwhile, in the device for limiting maximum input/output power according to the connection state according to an embodiment of the present invention, in the device for limiting maximum input/output power according to the connection state of the battery modules of the battery pack configured by connecting two or more battery modules in parallel, A control unit that generates a connection confirmation signal to check the connection status of each of the two or more battery modules, and checks the connection status of the battery module based on the response signal of each battery module to the connection confirmation signal, each battery module and A communication unit that transmits and receives signals, a maximum input/output power limiting unit that limits the maximum allowable input and output power of the battery pack based on the connection state of the battery module checked by the control unit, and the total number of the two or more battery modules and the number of battery packs. And a memory for storing the set maximum input/output power limit value and for storing the connection state of each battery module checked by the control unit.

The control unit includes a connection confirmation signal generation unit for generating a connection confirmation signal and a connection status determination unit for determining a connection state of each battery module according to whether a response signal from each battery module is received for the connection confirmation signal. , The response signal includes ID information of each battery module.

The maximum input/output power limiting unit is a calculation unit that calculates the number of normally connected battery modules based on the connection state of each battery module stored in the memory, and calculates a maximum input/output power limit value based on the number of normally connected battery modules. And a setting unit that updates and sets the maximum input/output power limit value calculated by the calculation unit to the battery pack.

The calculator calculates a maximum input/output power limit value by multiplying the number of normally connected battery modules by a preset maximum input/output power limit value and dividing it by the total number of previously stored battery modules.

The battery module receives a response signal generation unit that generates a response signal when a connection confirmation signal transmitted from the communication unit of the RBMS is received, and a response generated by the response signal generation unit after receiving the connection confirmation signal transmitted from the communication unit of the RBMS. It is configured to further include a communication unit for transmitting a signal.

The method and apparatus for limiting the maximum input/output power according to the connection state of the battery module according to an embodiment of the present invention transmits a connection confirmation signal from the RBMS to each battery module and connects the battery module to whether or not the connection confirmation signal is received from each battery module. Check the status and change the maximum input/output power limit value according to the number of confirmed normal connected battery modules.If the preset maximum input/output power limit value is maintained, the battery pack prevents overcharging and overdischarging caused by poorly connected battery modules. Protection from damage and continuous operation.

1 is a flowchart of a method for limiting maximum input/output power according to a connection state of a battery module according to an embodiment of the present invention.
2 is a flowchart of a connection state checking step of a method for limiting maximum input/output power according to a connection state of a battery module according to an embodiment of the present invention.
3 is a flowchart of a maximum input/output power limiting step of a method of limiting maximum input/output power according to a connection state of a battery module according to an embodiment of the present invention.
4 is a block diagram of a battery pack according to an embodiment of the present invention.
5 is a block diagram of an RBMS in a battery pack according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement the present invention. However, the present invention may be implemented in various forms and is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and similar reference numerals are assigned to similar parts throughout the specification.

Throughout the specification, when one part is "connected" to another part. This includes not only the case of being "directly connected", but also the case of being "electrically connected" with another element in between. In addition, 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. As used throughout the specification of the present application, the term "step (to)" or "step of" does not mean "step for".

In addition, terms including ordinal numbers such as first and second may be used to describe various elements, but the elements are not limited by the terms. The terms are used only for the purpose of identifying one component from another component. For example, without departing from the scope of the present invention, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element. The terms used in the present application are used only to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

The terms used in the present invention have been selected from general terms that are currently widely used while considering functions in the present invention, but this may vary depending on the intention or precedent of a technician working in the field, the emergence of new technologies, and the like. In addition, in certain cases, there are terms arbitrarily selected by the applicant, and in this case, the meaning of the terms will be described in detail in the description of the corresponding invention. Therefore, the terms used in the present invention should be defined based on the meaning of the term and the overall contents of the present invention, not a simple name of the term.

1. A method of limiting maximum input/output power according to a connection state of a battery module according to an embodiment of the present invention

In the method of limiting the maximum input/output power according to the connection state of the battery module of the present invention, the RBMS transmits a connection confirmation signal to each battery module, and the MBMS of each battery module transmits a response signal to the RBMS immediately upon receiving the connection confirmation signal. The RBMS is a method of checking the connection status of each battery module according to whether a response signal is received, and limiting the maximum input/output power according to the connection status of each checked battery module.

1 is a flowchart illustrating a method of limiting maximum input/output power according to a connection state of a battery module according to an exemplary embodiment of the present invention.

Referring to FIG. 1, in the method of limiting maximum input/output power according to a connection state of a battery module according to an embodiment of the present invention, it is first checked whether the connection state of each battery module is normal. (Connection status check step: S110). Then, the checked connection state of each battery module is stored (connection state storage step: S120), and maximum input/output power is limited based on the stored connection state of the battery module (maximum input/output power limit step: S130).

Hereinafter, the connection state checking step (S110) and the maximum input/output power limiting step (S130) will be described in more detail with reference to FIGS. 2 and 3.

A connection state checking step (S110) of a method of limiting maximum input/output power according to a connection state of a battery module according to an exemplary embodiment of the present invention will be described in detail with reference to FIG. 2 below.

2 is a flowchart of a connection state checking step (S110) of a method of limiting maximum input/output power according to a connection state of a battery module according to an embodiment of the present invention.

Referring to FIG. 2, the RBMS of the battery pack first generates a connection confirmation signal (connection confirmation signal generation step: S111) and transmits the generated connection confirmation signal to each battery module (connection confirmation signal transmission step: S112). Here, the connection confirmation signal includes a response signal request including the ID of each battery module, and is transmitted to all battery modules including ID information of one battery module or to all battery modules without ID information. I can.

In addition, when each battery module receives the connection confirmation signal, a response signal is immediately generated and transmitted to the RBMS (response signal generation and transmission step: S113), and the RBMS is the connection status of the battery module in which the response signal is received within a predetermined time. Is determined as normal, and the connection state of the battery module in which the response signal has not been received within a predetermined time is determined to be defective (connection state determination step: S114). In this case, the predetermined time may be set to 5 seconds as an example. Here, the response signal may be transmitted to the RBMS by generating a response signal including the ID of the corresponding module MBMS.

In the connection status check step (S110), a connection confirmation signal is transmitted to all battery modules at a time to check the connection status of each battery module, or a connection confirmation signal for checking one battery module is transmitted to all battery modules to sequentially each battery. You can check the connection status of the module. Here, the connection confirmation signal may include signal information for requesting a response together with the ID of each battery module.

First, when the connection confirmation signal is transmitted to all battery modules at once to check the connection status of each battery module, the RBMS generates a connection confirmation signal and transmits the generated connection confirmation signal to each battery module. Here, the connection confirmation signal may include signal information for requesting a response for ID information of the battery module.

Each battery module receives the connection confirmation signal, and upon receipt, a response signal including the ID of the corresponding battery module is generated and transmitted to the RBMS.

Upon receiving the response signal, the RBMS checks the ID of the battery module included in the response signal, determines the battery module as a normally connected battery module, and stores it in the memory.

In addition, if the RBMS does not receive the response signal for a predetermined period of time, the connection status of the unreceived battery module is determined as defective, and the ID of the battery module is stored as a poorly connected battery module.

In addition, when a connection confirmation signal for confirming one battery module is transmitted to all battery modules to sequentially check the connection status of each battery module, RBMS generates and generates a connection confirmation signal including the ID information of the first battery module. The connected connection confirmation signal is transmitted to all battery modules. Here, the order of generating the connection confirmation signal may be used by a user arbitrarily setting the order based on the ID of each battery module.

If the ID information of the first battery module included in the connection confirmation signal received among all battery modules matches the ID information of the own battery module, a response signal is immediately generated and transmitted to the RBMS. Here, the response signal may not include the ID of the corresponding battery module because the RBMS has already identified the ID of the corresponding battery module.

When a response signal is received by RBMS, the connection status of the first battery module is determined as normal and stored.

If the RBMS does not receive a response signal within a predetermined time, it determines the connection state of the first battery module as defective and stores it.

When the connection state of the first battery module is stored, the above procedure is repeated so that the connection state of the second battery module can be checked.

Meanwhile, a maximum input/output power limiting step (S130) of a method of limiting maximum input/output power according to a connection state of a battery module according to an embodiment of the present invention will be described in detail with reference to FIG. 3 below.

3 is a flowchart of a maximum input/output power limiting step (S130) of a method of limiting maximum input/output power according to a connection state of a battery module according to an embodiment of the present invention.

Referring to FIG. 3, the RBMS calculates the number of battery modules that have a normal connection state checked in the connection state confirmation step (S110) (normal connection battery module count calculation step: S131), and the calculated number of normally connected battery modules The total number of battery modules is compared (battery module number comparison step: S132).

In addition, when the number of normally connected battery modules is less than the total number of pre-stored battery modules, the next step of calculating the maximum input/output power limit value (S133) is performed. Here, the total number of battery modules is a value previously stored in the memory at the manufacturing stage. The memory stores the total number of battery modules and IDs of each battery module.

The maximum input/output power limit value is calculated based on the number of normally connected battery modules (maximum input/output power limit value calculation step: S133), and the calculated maximum input/output power limit value is updated in the RBMS and set (maximum input/output power limit value setting step: S134. ).

Here, the maximum input/output power limit calculation method uses a method of multiplying the number of normally connected battery modules by a preset maximum input/output power limit value and dividing by the total number of previously stored battery modules.

For example, the maximum input/output power limit value = (number of normally connected battery modules) * (preset maximum input/output power limit value)/ (total number of previously stored battery modules).

For example, if 4 battery modules are connected, the maximum input/output power limit is A.If the number of normally connected battery modules is 2, the preset maximum input/output power is A according to 4 battery modules. Is A/2.

Therefore, the maximum input/output power limit value of the battery pack is adjusted to A/2.

As another example, as in the maximum input/output power limiting step (S130), instead of limiting the maximum input/output power according to the number of normally connected battery modules, the maximum input/output current may be limited.

Hereinafter, a method of limiting the maximum input/output current will be described.

The RBMS calculates the number of battery modules in a normal connection state according to the number of normally connected battery modules calculation step (S131), and the number of normally connected battery modules calculated as in the battery module number comparison step (S132) and the total number of battery modules. Compare the numbers.

In addition, a maximum input/output current limit value is calculated based on the number of normally connected battery modules, and a preset maximum input/output current limit value is updated and set as the calculated maximum input/output current limit value.

Here, the method of calculating the maximum input/output current limit value uses a method of multiplying the number of normally connected battery modules by a preset maximum input/output current limit value and dividing by the total number of previously stored battery modules.

In this case, a preset maximum input/output current limit value is additionally stored in the memory.

For example, maximum input/output power limit = (number of normally connected battery modules) *(preset maximum input/output current limit value)/ (total number of battery modules).

For example, if 6 battery modules are connected, the maximum input/output current limit is A.If the number of normally connected battery modules is 2, the preset maximum input/output current is A for 6 battery modules. Is A/3.

Therefore, the maximum input/output current limit value of the battery pack is adjusted to A/3.

2. Device for limiting maximum input/output power according to the connection state of the battery module according to an embodiment of the present invention

The device for limiting the maximum input/output power according to the connection state of the battery module of the present invention checks the connection state of each battery module by transmitting and receiving signals to and from each battery module, and limits the maximum input/output power according to the confirmed connection state to use a stable battery pack. To be able to do it.

4 is a block diagram of a battery pack 100 according to an embodiment of the present invention.

Referring to FIG. 4, a battery pack 100 including a device for limiting maximum input/output power according to a connection state of a battery module according to an embodiment of the present invention includes an MBMS (210:210a, 210b) that transmits and receives signals to and from the RBMS 300. , 210c,..., 210n) connected in parallel with two or more battery modules (200:200a, 200b, 200c, ..., 200n), each battery module sends and receives a signal to check the connection status and connect the confirmed battery module It is configured to include the RBMS 300 that limits the maximum input/output power according to the state, and a memory 400 that stores the connection state of the battery module checked in the RBMS 300 and the limited maximum input/output power.

In more detail, the MBMS 210 of the battery module includes a response signal generation unit 211:211a, 211b, 211c, ..., 211n for generating a signal in response to the connection confirmation signal transmitted from the RBMS 300 and the RBMS It is configured to include a communication unit (212: 212a, 212b, 212c, ..., 212n) for transmitting and receiving signals with the 300. Here, since the RBMS 300 and the MBMS 210 of the battery module are electrically connected, the RBMS 300 can check the connection status by transmitting and receiving signals to the MBMS 210 of the battery module. In addition, the transmitted/received signal may include ID information of the battery module transmitted/received with the RBMS, and thus the RBMS may check the ID of the received response signal to confirm that the connection state of the corresponding battery module is normal.

In addition, the RBMS 300 in the battery pack according to an embodiment of the present invention will be described in detail with reference to FIG. 5 below.

5 is a block diagram of an RBMS 300 in a battery pack according to an embodiment of the present invention.

Referring to FIG. 5, the RBMS 300 generates a connection confirmation signal for confirming the connection state, and a control unit that checks the connection state of each battery module according to whether a response signal from each battery module is received for the connection confirmation signal ( 310), including a communication unit 320 for transmitting and receiving signals with each battery module 200 and a maximum input/output power limiting unit 330 for limiting the maximum input/output power according to the connection state of the battery module checked by the control unit 310 Is composed.

In more detail, the control unit 310 determines the connection status to determine the connection status of each battery module according to whether the connection confirmation signal generation unit 311 generating a connection confirmation signal and a response signal from each battery module 200 are received. It is configured to include the unit 312. The response signal from each battery module 200 may include ID information of each battery module.

In addition, the maximum input/output power limiting unit 320 includes a calculation unit 321 that calculates the number of battery modules in a normal connection state, a comparison unit 322 that compares the total number of battery modules with the number of normally connected battery modules, and The calculation unit 323 that calculates the maximum input/output power limit value based on the number of connected battery modules and the setting unit that updates and sets the maximum input/output power limit value previously stored in the battery pack with the maximum input/output power limit value calculated by the calculation unit 323 ( 324).

In more detail, the calculation unit 321 performs the number of normally connected battery modules calculation step (S131) of calculating the number of normally connected battery modules based on the connection state of each battery module stored in the connection state storage step (S120). do.

In addition, the calculation method performed by the calculation unit 323 is the same as the method performed in the maximum input/output power limit value calculation step (S133), and multiplies the number of normally connected battery modules checked by the verification unit 321 by a preset maximum input/output power limit value. This is a method of dividing by the total number of battery modules stored in the memory 400.

Here, the maximum input/output power limiter 320 may be configured as a maximum input/output current limiter.

Therefore, the maximum input/output current limiting unit is a calculation unit that calculates the number of battery modules in a normal connection state, such as the maximum input/output power limit unit 320, a comparison unit that compares the total number of battery modules and the number of normally connected battery modules, and a normal connection. It includes an operation unit that calculates the maximum input/output current limit value based on the number of battery modules, and a setting unit that updates and sets the maximum input/output current limit value previously stored in the battery pack with the maximum input/output current limit value calculated by the operation unit.

On the other hand, the memory 400 stores the connection state of each battery module stored in the connection state storage step (S120) and the maximum input/output power limit value calculated in the maximum input/output power limit value calculation step (S133), and the total number of battery modules, The preset maximum input/output power limit and ID of each battery module are also stored.

In addition, when configured as a maximum input/output current limiting unit, the memory 400 stores the maximum input/output current limit value calculated by the operation unit, and also stores a preset maximum input/output current limit value.

In addition, the memory can be integrated into the RBMS.

On the other hand, although the technical idea of the present invention has been described in detail according to the above embodiment, it should be noted that the above embodiment is for the purpose of explanation and not for the limitation thereof. In addition, a person having ordinary knowledge in the technical field of the present invention may be able to implement various embodiments within the described claims.

100: battery pack
200: battery module
210: MBMS
211: response signal generator
212: Ministry of Communications
300: RBMS
310: control unit
311: connection confirmation signal generation unit
312: connection status determination unit
320: communication department
330: maximum input/output power limiter
331: calculation unit
332: comparison unit
333: operation unit
334: setting unit
400: memory

Claims (10)

In the method of limiting the maximum input and output power of a battery pack in which two or more battery modules are connected in parallel,
A connection state checking step of checking whether the connection state of each battery module is normal through signal transmission and reception between the RBMS of the battery pack and the MBMS of each battery module; And
The maximum input/output power limit that limits the maximum allowable input/output power of the battery pack by adjusting the maximum input/output power limit value of the battery pack based on the number of battery modules confirmed to be in a normal connection state through the connection status check step. step;
A method for limiting maximum input/output power of a battery pack according to a connection state of a battery module, comprising: a.
The method according to claim 1,
The step of checking the connection status,
A connection confirmation signal generation step in which the RBMS of the battery pack generates a connection confirmation signal;
A connection confirmation signal transmitting step of transmitting the generated connection confirmation signal to the MBMS of each battery module;
A response signal generation and transmission step of generating and transmitting a response signal to the RBMS when the MBMS of each battery module receives the connection confirmation signal transmitted from the RBMS through the connection confirmation signal transmission step; And
The RBMS includes a connection state determination step of determining whether a connection state of a corresponding battery module is normal according to whether a response signal from each MBMS is received within a predetermined time;
A method of limiting maximum input/output power according to a connection state of a battery module, comprising: a.
The method according to claim 2,
The response signal includes the ID information of the corresponding battery module, the maximum input and output power limit method according to the connection state of the battery module.
The method according to claim 2,
The step of limiting the maximum input/output power,
A counting step of calculating the number of battery modules whose connection state is determined to be normal in the connection state determination step;
A battery module number comparison step of comparing the total number of battery modules with the number of normally connected battery modules calculated in the step of calculating the number of normally connected battery modules;
A maximum input/output power limit value calculation step of calculating a maximum input/output power limit value based on the number of normally connected battery modules; And
A maximum input/output power limit value setting step of updating and setting the maximum input/output power limit value calculated in the maximum input/output power limit value calculation step in the RBMS;
A method of limiting maximum input/output power according to a connection state of a battery module, comprising: a.
The method of claim 4,
The input/output power limit value calculation step,
The maximum input/output power limit method according to a connection state of a battery module, characterized in that the calculation is performed by multiplying the number of normally connected battery modules by a preset maximum input/output power limit value and dividing by the total number of pre-stored battery modules.
In the device for limiting maximum input/output power according to a connection state of a battery module of a battery pack configured by connecting two or more battery modules in parallel,
The RBMS of the battery pack,
A control unit that generates a connection confirmation signal for checking the connection status of each of the two or more battery modules, and checks the connection status of the battery module based on a response signal of each battery module to the connection confirmation signal;
A communication unit for transmitting and receiving signals to and from the MBMS of each battery module;
The maximum input/output power that adjusts the maximum input/output power value of the battery pack based on the number of battery modules that are in a normal connection state among the connection states of the battery modules checked by the control unit, and limits the maximum allowable input/output power by the battery pack accordingly. Restriction; And
A memory for storing the total number of the two or more battery modules and a preset maximum input/output power limit value of the battery pack and for storing a connection state of each battery module checked by the control unit;
Maximum input and output power limiting device configured, including.
The method of claim 6,
The control unit of the RBMS,
A connection confirmation signal generator for generating a connection confirmation signal; And
A connection state determination unit determining a connection state of each battery module according to whether a response signal is received within a predetermined time from the MBMS of each battery module for the connection confirmation signal;
Consists of including,
The maximum input/output power limiting device, wherein the response signal includes ID information of each battery module.
The method of claim 7,
The maximum input/output power limiting unit,
A calculation unit that calculates the number of normally connected battery modules based on the connection state of each battery module stored in the memory;
An operation unit for calculating a maximum input/output power limit value based on the number of normally connected battery modules; And
A setting unit for updating and setting the maximum input/output power limit value calculated by the operation unit to the battery pack;
Maximum input and output power limiting device configured, including.
The method of claim 8,
The calculation unit,
And calculating a maximum input/output power limit value by multiplying the number of normally connected battery modules by a preset maximum input/output power limit value and dividing by the total number of pre-stored battery modules.
The method of claim 7,
MBMS of the battery module,
A response signal generator for generating a response signal when the connection confirmation signal transmitted from the communication unit of the RBMS is received; And
A communication unit for receiving a connection confirmation signal transmitted from the communication unit of the RBMS and transmitting a response signal generated by the response signal generation unit;
Maximum input and output power limiting device configured to further include.

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