KR20210018038A - Wireless Battery Management System and Node for Wireless Communication and Method for Transmitting Data - Google Patents

Abstract

The present invention relates to a wireless battery management system, a node for wireless communication, and a method for transmitting data, which guarantee stability and efficiency when acquiring battery data via wireless communication. According to one embodiment of the present invention, the wireless battery management system comprises: a manager node to acquire battery data from a plurality of monitor nodes by using a first channel and a second channel which are wireless communication-based communication channels; a first monitor node to collect first battery data, and transmit the first battery data to the manager node through the first channel during a first dedicated slot; and a second monitor node to collect second battery data, and transmit the second battery data to the manager node through the second channel during the first dedicated slot.

Description

Wireless Battery Management System and Node for Wireless Communication and Method for Transmitting Data}

The present invention relates to a wireless battery management system, and more particularly, to a wireless battery management system for ensuring stability and efficiency when acquiring battery data through wireless communication, a node for wireless communication, and a data transmission method.

Research on high-performance batteries capable of repetitive charging and discharging as the demand for portable electronic products such as notebook computers, video cameras, and portable telephones increases rapidly, and development of electric vehicles, energy storage batteries, robots, satellites, etc. Is actively progressing.

The minimum unit of the battery may be referred to as a battery cell, and a plurality of battery cells connected in series may constitute a battery module. In addition, a battery pack may be configured by connecting a plurality of battery modules in series or in parallel.

A battery pack mounted on an electric vehicle or the like generally includes a plurality of battery modules connected in series or parallel to each other. Such a battery pack includes a battery management system that monitors the state of each battery module included therein and executes a control operation corresponding to the monitored state.

The battery management system includes a controller for acquiring and analyzing battery data. However, since each battery module included in the battery pack includes a plurality of battery cells, there is a limit to monitoring the state of all battery cells included in the battery pack using a single controller. Accordingly, in recent years, in order to distribute the load of the controller and quickly and accurately monitor the state of the entire battery pack, the controller is installed for each predetermined number of battery modules included in the battery pack, and then any one of the controllers is mastered. ), and the rest of the controllers as slaves.

The slave controller mounted for each predetermined number of battery modules is connected to the master controller through a wired communication network such as CAN (Control Area Network), collects battery data of the battery module in charge of itself, and transmits the battery data to the master controller. do.

On the other hand, in order to prevent space inefficiency that occurs when a CAN is established for communication between the master controller and the slave controller, a short-range wireless channel is set between the master controller and the slave controller, and the master controller and the slave controller through the wireless channel. A technology for performing short-range wireless communication has emerged.

However, in a short-range wireless communication environment, wireless communication is frequently unstable such as interference, radio signal deterioration, and radio signal collision. When the state of the wireless communication channel is unstable, the master controller may not acquire battery data from the slave controller or control the slave controller in time, which acts as a problem of deteriorating the quality of the entire battery pack.

The present invention provides a wireless battery management system supporting stable communication between a manager node set as a master and a monitor node set as a slave in a wireless communication environment, and a node and a data transmission method for wireless communication. This is the technical task.

In addition, an object of the present invention is to provide a wireless battery management system for increasing the availability of a wireless channel, a node for wireless communication, and a data transmission method.

A wireless battery management system according to an aspect of the present invention includes: a manager node for obtaining battery data from a plurality of monitor nodes using a first channel and a second channel, which are wireless communication-based communication channels; A first monitor node that collects first battery data and transmits the first battery data to the manager node through the first channel during a first dedicated slot; And a second monitor node collecting second battery data and transmitting the second battery data to the manager node through the second channel during the first dedicated slot.

According to another aspect of the present invention, a manager node includes: a first wireless communication unit configured to set a communication channel through a first frequency-based first channel; A second wireless communication unit configured to set a communication channel as a second frequency-based second channel; And during a first dedicated slot shared by a first monitor node and a second monitor node, the first battery data is received from the first monitor node using the first wireless communication unit, and the second battery data is received from the first monitor node using the second wireless communication unit. It includes a manager control unit for receiving second battery data from the two monitor nodes.

According to another aspect of the present invention, a monitor node includes a wireless communication unit for wireless communication with a manager node; An interface connected to the battery module; And collecting battery data using the interface, and setting a communication channel of the wireless communication unit to a first channel different from the communication channel of the other monitor node during a first dedicated slot shared with the other monitor node, and the first channel And a monitor control unit for transmitting the battery data to the manager node through the terminal.

A method for transmitting battery data in a wireless battery management system according to another aspect of the present invention includes: sharing a plurality of dedicated slots with a first monitor node and a second monitor node; And during the N-th dedicated slot, transmitting, by a first monitor node, the first battery data to the manager node through a first channel, and transmitting, by the second monitor node, the second battery data to the manager node through a second channel. Includes.

According to an embodiment of the present invention, there is an effect of increasing the availability of a radio channel by simultaneously communicating with a manager node using different channels during dedicated slots shared by monitor nodes set as a group.

According to an embodiment of the present invention, after allocating a plurality of dedicated slots to a monitor node, if the monitor node fails to transmit battery data during the first dedicated slot, the battery data is re-managered during the second dedicated slot after changing the channel. By sending it to a node, data loss is prevented and stable wireless communication is supported.

1 is a diagram illustrating a battery management system according to an embodiment of the present invention.
2 is a diagram illustrating a data frame according to an embodiment of the present invention.
3 is a flowchart illustrating a method of allocating a dedicated slot in a wireless battery management system according to an embodiment of the present invention.
4 is an example of a data frame to which a dedicated slot is allocated.
5 is another example of a data frame to which a dedicated slot is allocated.
6 is a diagram illustrating a radio link formed at the timing of a first dedicated slot of each group.
7 is a diagram illustrating channels used for timing of dedicated slots in the first order of each group.
8 is a diagram illustrating a wireless link formed in response to a battery data transmission failure.
9 is a diagram illustrating a data frame generated when data transmission fails for the first time.
10 is a diagram illustrating a data frame generated when data transmission fails for the second time.
11 is a diagram illustrating a data frame generated when data transmission fails for the third time.
12 is a diagram illustrating a configuration of a manager node according to an embodiment of the present invention.
13 is a flowchart illustrating a method of allocating a dedicated slot in a manager node according to an embodiment of the present invention.
14 is a flowchart illustrating a method of changing a channel by a manager node according to data loss according to another embodiment of the present invention.
15 is a diagram illustrating a configuration of a monitor node according to an embodiment of the present invention.
16 is a flowchart illustrating a method of transmitting battery data from a monitor node according to an embodiment of the present invention.

The same reference numbers throughout the specification mean substantially the same elements. In the following description, when not related to the core configuration of the present invention and detailed descriptions of configurations and functions known in the technical field of the present invention may be omitted. The meaning of the terms described in this specification should be understood as follows.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms different from each other, and only these embodiments make the disclosure of the present invention complete, and common knowledge in the technical field to which the present invention pertains. It is provided to completely inform the scope of the invention to those who have it, and the invention is only defined by the scope of the claims.

The shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for explaining the embodiments of the present invention are exemplary, and the present invention is not limited to the illustrated matters. The same reference numerals refer to the same components throughout the specification. In addition, in describing the present invention, when it is determined that a detailed description of related known technologies may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

When'include','have','consists of' and the like mentioned in the present specification are used, other parts may be added unless'only' is used. In the case of expressing the constituent elements in the singular, it includes the case of including the plural unless specifically stated otherwise.

In interpreting the constituent elements, it is interpreted as including an error range even if there is no explicit description.

In the case of a description of a temporal relationship, for example, when a temporal predecessor relationship is described as'after to','following to','after to','to to the next','before to', etc., ' It may also include cases that are not continuous unless'direct' or'direct' is used.

First, second, etc. are used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one component from another component. Accordingly, the first component mentioned below may be a second component within the technical idea of the present invention.

The term “at least one” is to be understood as including all possible combinations from one or more related items. For example, the meaning of “at least one of the first item, the second item, and the third item” means 2 among the first item, the second item, and the third item, as well as each of the first item, the second item, and the third item. It may mean a combination of all items that can be presented from more than one.

Each of the features of the various embodiments of the present invention can be partially or entirely combined or combined with each other, technically various interlocking and driving are possible, and each of the embodiments can be implemented independently of each other or can be implemented together in a related relationship. May be.

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

1 is a diagram illustrating a battery management system according to an embodiment of the present invention.

1, a battery management system according to an embodiment of the present invention includes a manager node 100 and a plurality of monitor nodes 200-N, and includes a manager node 100 and a monitor node 200- N) perform wireless communication with each other.

In the battery management system, the manager node 100 includes a controller set as a master, and the monitor node 200-N includes a controller set as a slave.

As an embodiment, the manager node 100 and the monitor node 200-N may wirelessly communicate with each other through a short-range wireless communication protocol based on IEEE 802.15.4+. As another embodiment, the manager node 100 and the monitor node 200-N can wirelessly communicate with each other using a protocol based on any one of IEEE 802.11, IEEE 802.15, IEEE 802.15.4, etc. It is also possible to communicate wirelessly with each other using the short-range wireless protocol of.

The monitor node 200-N is mounted on one or more battery modules in which cells are aggregated, and collects data including voltage, current, temperature, humidity, and the like generated from the battery module. In addition, the monitor node 200-N self-checks the status of the battery module, such as measuring the AFE (Analog Front End) of the battery module it is mounted on, and checking the status of the battery module (i.e., diagnostic test). It is also possible to generate self-diagnosis data with recorded data.

The manager node 100 receives battery data including one or more of current, voltage, temperature, and self-diagnosis data from each monitor node 200-N, and analyzes the received battery data to determine the status of each battery module. Or monitor the condition of the battery pack. The manager node 100 analyzes data of each battery module received from each monitor node 200-N, and estimates the state of each battery module (eg, SOC, SOH) and the state of the entire battery pack. May be.

According to an embodiment of the present invention, the manager node 100 includes two or more wireless communication units 110 and 120. The wireless communication units 110 and 120 may include a circuit and an antenna for performing short-range wireless communication. The plurality of wireless communication units 110 and 120 in the manager node 100 are set to different communication channels. For example, the first wireless communication unit 110 is set to a first channel based on a first frequency, and the second wireless communication unit 120 is set to a second channel based on a first frequency.

The manager node 100 simultaneously receives a plurality of battery data from a pair of monitor nodes 200 -N using the first wireless communication unit 110 and the second wireless communication unit 120. For example, the manager node 100 receives the first battery data from the monitor node #1 (200-1) using the first wireless communication unit 110 at a specific timing (ie, a dedicated slot), and the second wireless communication unit The second battery data is received from the monitor node #2 200-2 using (120). In addition, when the reception of battery data using the first channel and the second channel fails, the manager node 100 changes the communication channel of the first wireless communication unit 110 to a third channel, or the second wireless communication unit 120 The communication channel of) can be changed to the fourth channel. Here, a channel indicates a wireless communication path, and the wireless communication units 110, 120, and 210-N may be set to any one of a plurality of channels. Setting to a specific channel means that the wireless communication units 110, 120, and 210-N are set to a communication frequency corresponding to the specific channel. Each channel has a different frequency. The frequency of the first channel and the frequency of the second channel may be set to be spaced apart by a predetermined frequency value or more in consideration of interference between each other.

The manager node 100 and the monitor node 200 -N may communicate using a data frame having a predefined format. The manager node 100 transmits a beacon initially disposed in the data frame to each of the monitor nodes 200-N to synchronize slot timings included in the data frame.

2 is a diagram illustrating a data frame according to an embodiment of the present invention.

Referring to FIG. 2, a data frame used in wireless communication of the present invention includes a plurality of time slots such as a manager slot and a transmission slot, and the data frame has a constant time length (Tms). Has. In addition, each of the manager slot and the transmission slot is assigned a preset time, and the arrangement order is also constant. The first manager slot arranged in the data frame is a dedicated slot used by the manager node 100 and includes a beacon. The beacon synchronizes slot timing by performing a function of notifying the start of a data frame. The manager node 100 continuously transmits the beacon at regular intervals. The manager node 100 transmits the beacon through each of the first wireless communication unit 110 and the second wireless communication unit 120.

The monitor node 200-N recognizes the start time of the data frame based on the beacon, and may extract a manager slot and a time slot having a time allocated in advance based on the beacon from the data frame.

In the data frame, the manager slot is a slot used by the manager node 100 to control the monitor node 200-N.

The transmission slot is a section in which data of each monitor node 200-N is transmitted, and is a dedicated slot for each monitor node 200-N. The transmission slot may be divided into a first sub-transmission slot (T-Slot1) and a second sub-transmission slot (T-Slot2). The first sub-transmission slot (T-Slot1) may have a longer time length than the second sub-transmission slot (T-Slot2), or the first sub-transmission slot (T-Slot1) and the second sub-transmission slot (T- Slot2) can have the same length of time.

The first sub-transmission slot (T-Slot1) is a section in which the first channel of the first wireless communication unit 110 and the second channel of the second wireless communication unit 120 are used, and may be divided into a plurality of dedicated slots. . In addition, the second sub transmission slot (T-Slot2) is a section in which at least one of the third channel of the first wireless communication unit 110 and the fourth channel of the second wireless communication unit 120 is used, and a plurality of dedicated slots Can be divided into

The monitor node 200-N includes one wireless communication unit 210-N, and communicates with the manager node 100 using the wireless communication unit 210-N, and in addition to the surrounding monitor node 200-N ) Can also communicate. According to the control of the manager node 100, the monitor node 200-N receives one or more of sensing information (eg, temperature, humidity, voltage, current, etc.) of one or more battery modules on which it is mounted, and a self-diagnosis result. The included battery data may be collected and reported to the manager node 100.

The monitor node 200 -N sets any one of a first channel and a second channel as a main communication channel, and transmits battery data to the manager node 100 by preferentially using the channel set as the main communication channel. The monitor node 200 -N may set a channel used in a first dedicated slot among a plurality of allocated dedicated slots as a main communication channel. When the battery data transmission fails using the main communication channel, the monitor node 200 -N transmits the battery data back to the manager node 100 using another channel. If the transmission of battery data using the other channel fails, the monitor node 200 -N changes the currently set communication channel to another channel and transmits the battery data to the manager node 100 again.

3 is a flowchart illustrating a method of allocating a dedicated slot in a wireless battery management system according to an embodiment of the present invention.

Referring to FIG. 3, when the power is turned on or network formation is input, the manager node 100 requests network participation and identification information in order to participate in the local wireless network with monitor nodes 200-N located nearby. The message is broadcast based on short-range wireless communication (S301). The manager node 100 may transmit the message during a manager slot of a data frame.

Then, when each monitor node 200-N receives the message, it transmits a participation response including its identification information (eg, MAC address) to the manager node 100 (S303). At this time, the monitor node 200-N uses a CSMA-CA (Carrier Sense Multiple Access with Collision Avoidance) technology to prevent response collisions, at a time when the other monitor node 200-N does not transmit a response. A participation response including its own identification information may be transmitted to the manager node 100.

Next, the manager node 100 determines the number of monitor nodes 200-N participating in the local area wireless network by checking and counting the identification information of the monitor node 200-N that has received the participation response (S305). ). Subsequently, the manager node 100 groups the monitor nodes so that groups having as many members as a predetermined number (eg, two) are generated (S307). Meanwhile, when less than a predetermined number of monitor nodes remain and the monitor nodes do not belong to a group, the manager node 100 may create a group such that the remaining monitor nodes are included in one group. The manager node 100 may set the number of wireless communication units 110 and 120 as the number of members. Also, the manager node 100 may group the monitor nodes 200 -N based on the order of reception of the participation response or at random. For example, as shown in FIG. 1, when six monitor nodes participate in a short-range wireless network, the manager node 100 sets the monitor node #1 (200-1) and the monitor node #2 (200-2) to a first group. As a second group, monitor node #3 (200-3) and monitor node #4 (200-4) are designated as a second group, and monitor node #5 (200-5) and monitor node #6 (200-6) are designated as a third group. Can be set to

Subsequently, the manager node 100 allocates a plurality of dedicated slots for each group (S309). Specifically, the manager node 100 divides the first sub-transmission slot (T-Slot1) equally by the number of groups*N and allocates it to each group, and the second sub-transmission slot (T-Slot2) is also the number of groups* It is divided equally by the number of N and allocated to each group. In addition, the manager node 100 equally allocates dedicated slots of a specific group to the monitor nodes 200-N belonging to the group, so that the dedicated slots are shared among the monitor nodes of the same group. In addition, the manager node 100 generates channel setting information of each dedicated slot. The channel setting information includes channel identification information used during a dedicated slot, and the manager node 100 generates the channel setting information to use different channels during a transmission slot shared by nodes of the same group. Subsequently, the manager node 100 transmits allocation information including information on the dedicated slot allocated to the monitor node 200-N (eg, start point and end point) and channel setting information for each dedicated slot to the monitor node 200-N. Each is generated for each, and the allocation information is transmitted to the corresponding monitor node 200-N (S311).

Then, the monitor node 200-N checks each dedicated slot information and channel setting information from the allocation information, and sets a plurality of sections corresponding to the dedicated slot information in the transmission slot of the data frame as dedicated slots, In addition, a channel used in each dedicated slot is checked based on the channel setting information (S313). For example, each monitor node 200 -N sets a plurality of dedicated slots as shown in FIG. 4 based on the allocation information received from the manager node 100, and also checks channels used in each dedicated slot. The monitor node 200-N checks the identification information of the channel used during the first-order dedicated slot in the allocation information, and sets the communication channel of the wireless communication unit 210-N to correspond to the identification information of the channel.

4 is an example of a data frame to which a dedicated slot is allocated.

4, 5, and 7 to 10, "M" denotes a monitor node, "P" denotes a wireless communication path that communicates with the first wireless communication unit 110 of the manager node 100, and "S "Represents a wireless communication path that communicates with the second wireless communication unit 120 of the manager node 100. In addition, "CHn" in parentheses indicates channel identification information. In an embodiment of the present invention, the first channel is "CH11", the second channel is "CH17", the third channel is "CH13", and the fourth channel is " CH19". In addition, the first group includes monitor node #1 (M1, 200-1) and monitor node #2 (M2, 200-2), and the second group includes monitor node #3 (M3, 200-3) and monitor It will be described as including node #4 (M4, 200-4), and a third group including monitor node #5 (M5, 200-5) and monitor node #6 (M6, 200-6).

When there are three groups and two wireless communication units 110 and 120 are installed, the manager node 100 may allocate a dedicated slot and set a channel as shown in FIG. 4. That is, the manager node 100 generates a plurality of dedicated slots 41 to 46 by dividing the first sub-transmission slot T-Slot1 into six numbers, and the first dedicated slot 41 and the second dedicated slot ( 42) is assigned to the first group, the third dedicated slot 43 and the fourth dedicated slot 44 are assigned to the second group, and the fifth dedicated slot 45 and the sixth dedicated slot 46 are provided. Can be assigned to 3 groups. The manager node 100 uses the result of multiplying the number of groups (i.e. 3) and the number of wireless communication units 110 and 120 (i.e., 2) as the number of divisions of the first sub transmission slot (T-Slot1). I can. In addition, the manager node 100 generates a plurality of dedicated slots 47, 48, 49 by equally dividing the second sub-transmission slot T-Slot2 by the number of groups, among which the seventh dedicated slot 47 is assigned. It is possible to allocate to the first group, allocate the eighth dedicated slot 48 to the second group, and allocate the ninth dedicated slot 49 to the third group.

Monitor nodes belonging to the same group are set to communicate with different wireless communication units 110 and 120 during a shared dedicated slot. To this end, one of the monitor nodes 200-N belonging to the same group communicates with the first wireless communication unit 110 during a specific dedicated slot, and the other communicates with the second wireless communication unit 120 during the specific dedicated slot. So, the manager node 100 generates channel setting information for each monitor node.

4, during the first dedicated slot 41, the first monitor node 200-1 communicates with the first wireless communication unit 110 of the manager node 100 through a first channel CH11, The second monitor node 200-2 communicates with the second wireless communication unit 120 of the manager node 100 through a second channel CH17. In addition, during the second dedicated slot 42, the first monitor node 200-1 communicates with the second wireless communication unit 120 of the manager node 100 through a second channel CH17, and the second monitor node 200-2 communicates with the first wireless communication unit 110 of the manager node 100 through the first channel CH11. As another example, during the third dedicated slot 43, the third monitor node 200-3 communicates with the first wireless communication unit 110 of the manager node 100 through the first channel CH11, and The monitor node 200-4 communicates with the second wireless communication unit 120 of the manager node 100 through a second channel CH17. Meanwhile, the manager node 100 generates channel setting information so that another channel is used during the second sub-transmission slot T-Slot2. As shown in FIG. 4, the manager node 100 uses the first channel CH11 and the second channel CH17 during the first sub transmission slot T-Slot1, and the second sub transmission slot T-Slot2. During the period, channel setting information may be generated so that the third channel CH13 and the fourth channel CH19 are used.

The reason for using different channels during the second sub transmission slot (T-Slot2) in this way is that interference occurs in the first channel (CH11) and the second channel (CH17) used during the first subtransmission slot (T-Slot1). This is to prevent failure of battery data transmission. That is, the monitor node 200-N that fails to transmit battery data due to interference during the first sub transmission slot T-Slot1 transmits the battery data back to the manager node 100 after performing a wireless channel change. .

When allocated to the dedicated slot as shown in FIG. 4, the monitor node 200-N transmits battery data to the manager node 100 during the dedicated slot of the first order, and if the transmission of the battery data fails, during the dedicated slot of the next order. The battery data is transmitted back to the manager node 100. For example, monitor node #1 (200-1) transmits battery data to the manager node 100 during the first dedicated slot 41, and if the transmission of battery data fails, the second dedicated slot 42 The battery data is retransmitted to the manager node 100. If the transmission of battery data fails even during the second transmission slot 42, the monitor node #1 200-1 thirdly transmits the battery data to the manager node 100 during the seventh dedicated slot 47.

Meanwhile, the length of the first sub-transmission slot T-Slot1 and the length of the second sub-transmission slot T-Slot2 may be the same.

5 is another example of a data frame to which a dedicated slot is allocated.

In the data frame according to FIG. 4, the length of the first sub-transmission slot T-Slot1 is longer than the length of the second sub-transmission slot T-Slot2. On the other hand, the data frame according to FIG. 5 has the same length as the first sub-transmission slot T-Slot1 and the second sub-transmission slot T-Slot2.

As shown in FIG. 5, the manager node 100 divides the first sub transmission slot T-Slot1 into 6 to generate 6 dedicated slots 41 to 46, and also generates the second sub transmission slot T -Slot2) can be divided equally into 6 to create 6 dedicated slots (47 ~ 49, 51 ~ 53). The manager node 100 selects the seventh dedicated slot 47 and the tenth dedicated slot 51 among the dedicated slots 47 to 49 and 51 to 53 included in the second subtransmission slot T-Slot2. To the group, the 8th dedicated slot 48 and the 11th dedicated slot 52 to the second group, and the ninth dedicated slot 49 and the 12th dedicated slot 53 to the third group. I can. In the case of using the data frame as shown in FIG. 5, when the transmission of battery data fails, the monitor node 200 -N may transmit the battery data back to the manager node 100 a total of 3 times.

6 is a diagram illustrating a radio link formed at the timing of a first dedicated slot of each group.

7 is a diagram illustrating channels used for timing of dedicated slots in the first order of each group.

6 and 7, the manager node 100 is a channel used in the first sub-transmission slot (T-Slot1), and the communication channel of the first wireless communication unit 110 and the second wireless communication unit 120 communicate with each other. Set each channel. That is, the manager node 100 sets the communication channel of the first wireless communication unit 110 to the first channel CH11, and sets the communication channel of the second wireless communication unit 120 to the second channel CH17. In addition, each monitor node (200-N) checks the identification information of the channel used in the dedicated slot of the first order among the allocated dedicated slots (that is, identification information of the main channel), and the identification information of the channel A communication channel of the wireless communication unit 210-N is set as a corresponding channel. That is, each of the monitor node #1 (200-1), monitor node #3 (200-3), and monitor node #5 (200-5) communicates with the wireless communication unit (210-1, 210-3, 210-5). Set the channel as the first channel CH11 to communicate with the first wireless communication unit 110 of the manager node 100, and monitor node #2 (200-2), monitor node #4 (200-4), and monitor node Each of #6 (200-6) sets the communication channel of the wireless communication unit (210-2, 210-4, 210-6) to the second channel (CH17), and the second wireless communication unit 120 of the manager node 100 Communicate with

In the state in which the communication channel is set in this way, the monitor node #1 (200-1) uses the wireless communication unit #1 (210-1) set as the first channel (CH11), and the first battery during the first dedicated slot (41). Data is transmitted to the manager node 100, and the monitor node #2 (200-2) uses the wireless communication unit #2 (210-2) set to the second channel (CH17) to control the data during the first dedicated slot (41). 2 The battery data is transmitted to the manager node 100. Similarly, the monitor node #3 (200-3) uses the wireless communication unit #3 (210-3) set to the first channel (CH11) to transmit the third battery data to the manager node (100) during the third dedicated slot (43). ), and the monitor node #4 (200-4) transmits the fourth battery data to the manager node during the third dedicated slot 43 using the wireless communication unit #4 (210-4) set to the second channel (CH17). Send to (100). In addition, the monitor node #5 (200-5) uses the wireless communication unit #5 (210-5) set to the first channel (CH11) to transmit the fifth battery data to the manager node (100) during the fifth dedicated slot (45). ), and the monitor node #6 (200-6) transmits the sixth battery data to the manager node during the fifth dedicated slot 45 using the wireless communication unit #6 (210-6) set to the second channel (CH17). Send to (100).

The manager node 100 uses the first wireless communication unit 110 set to the first channel CH11 and the second wireless communication unit 120 set to the second channel CH17 during the first dedicated slot 41. The battery data and the second battery data are simultaneously collected, the third battery data and the fourth battery data are simultaneously collected during the third dedicated slot 43, and the fifth battery data and the sixth battery are collected during the fifth dedicated slot 45. Collect data simultaneously.

One or more of these battery data may fail to transmit.

In this case, the monitor node 200-N retransmits the battery data using a dedicated slot in the following order among the allocated dedicated slots.

8 is a diagram illustrating a wireless link formed in response to a battery data transmission failure.

9 is a diagram illustrating a data frame generated when data transmission fails for the first time.

8 and 9, when the first battery data transmission to the manager node 100 fails during the first dedicated slot 41, the monitor node #1 (200-1), the wireless communication unit #1 (210-1). ) To form a radio link with the second radio communication unit 120 of the manager node 100 by changing the communication channel from the first channel CH11 to the second channel CH17. The monitor node #1 (200-1) transmits the first battery data to the manager node 100, but if an ACK is not received from the manager node 100 during a preset time, it may be determined that data transmission has failed. . The monitor node #1 200-1 having changed the communication channel transmits the first battery data to the manager node 100 during the second dedicated slot 42. In this case, the first battery data is transmitted to the second wireless communication unit 120 of the manager node 100. The data frame of FIG. 9 illustrates a state in which the first battery data is transmitted back to the manager node 100 during the second dedicated slot 42. The battery data transmission from the monitor node 200-N to the manager node 100 and the ACK message transmission from the manager node 100 to the monitor node 200-N may be performed during one dedicated slot.

The monitor node #1 200-1 may fail to transmit the first battery data even during the second dedicated slot 42.

10 is a diagram illustrating a data frame generated when data transmission fails for the second time.

If the monitor node #1 (200-1) fails to transmit the first battery data during the second dedicated slot 42, the communication channel of the wireless communication unit #1 (210-1) is changed from the second channel (CH17) to the fourth channel. By changing to (CH19), a wireless link is formed with the second wireless communication unit 120 of the manager node 100. As shown in FIG. 10, the monitor node #1 200-1 transmits the first battery data back to the manager node 100 during the seventh dedicated slot 47. The first battery data is transmitted through a fourth channel CH19 formed between the wireless communication unit #1 210-1 of the monitor node #1 200-1 and the second wireless communication unit 120 of the manager node 100. Is transmitted.

On the other hand, as shown in FIG. 5, when four dedicated slots are allocated to the monitor node, monitor node #1 (200-1) is the first battery data during the third dedicated slot, that is, the seventh dedicated slot 47 If the transmission of is unsuccessful, the first battery data may be transmitted to the manager node 100 again during the fourth dedicated slot 51 in the fourth order.

11 is a diagram illustrating a data frame generated when data transmission fails for the third time.

If the monitor node #1 (200-1) fails to transmit the first battery data during the seventh dedicated slot 47, the communication channel of the wireless communication unit #1 (210-1) is changed from the fourth channel (CH19) to the third channel. By changing to (CH13), a radio link with the first radio communication unit 110 of the manager node 100 is formed. As shown in FIG. 11, the monitor node #1 200-1 transmits the first battery data to the manager node 100 again during the tenth dedicated slot 51.

As described above, the monitor nodes 200-N belonging to the same group and sharing a dedicated slot communicate with the manager node 100 through different channels at the same transmission timing (ie, dedicated slot). In addition, if the transmission of battery data fails during the N-th order of dedicated slots among the allocated dedicated slots, the monitor node 200-N changes the communication channel and manages the battery data during the N+1-th order of dedicated slots. Retransmit to node 100.

12 is a diagram illustrating a configuration of a manager node according to an embodiment of the present invention.

As shown in FIG. 12, the manager node 100 according to an embodiment of the present invention includes a first wireless communication unit 110, a second wireless communication unit 120, a manager storage unit 130, and a manager control unit 140. Includes.

The first wireless communication unit 110 communicates with the monitor node 200-N through a specific channel.

The second wireless communication unit 120 communicates with the monitor node 200-N through a channel different from the communication channel of the first wireless communication unit 110.

The first wireless communication unit 110 and the second wireless communication unit 120 are provided with a radio frequency (RF) circuit for performing short-range wireless communication. In addition, the first wireless communication unit 110 and the second wireless communication unit 120 broadcast beacons at regular intervals. Transmission timings of the beacon transmitted from the first wireless communication unit 110 and the beacon transmitted from the second wireless communication unit 120 may be the same or different.

The manager storage unit 130 is a storage means such as a memory or a disk device, and stores various programs and data for the manager node 100 to operate. In particular, the manager storage unit 130 may store a program (or instruction set) in which an algorithm for executing the operation of the manager node 100 is defined. Also, the manager storage unit 130 may store battery data received from each of the monitor nodes 200 -N. The manager storage unit 130 may store a participation list.

The manager control unit 140 is an operation processing device such as a microprocessor, and controls the overall operation of the manager node 100 and generates data for controlling the monitor node 200-N. After loading data related to a program (or instruction set) stored in the manager storage unit 130 into a memory, the manager control unit 140 may perform wireless communication and dedicated slot allocation according to an embodiment of the present invention.

The manager control unit 140 acquires battery data of each monitor node 200-N using the first wireless communication unit 110 or the second wireless communication unit 120, and analyzes the battery data to determine the monitor node 200. -N) can analyze the status of the installed battery modules. In addition, the manager controller 140 may comprehensively analyze each battery data to determine the state of the battery pack and control charging and discharging.

The manager control unit 140 may receive a plurality of battery data from the plurality of monitor nodes 200 -N using both the first wireless communication unit 110 and the second wireless communication unit 120. The manager control unit 140 sets the communication channel of the first wireless communication unit 110 to the first channel CH11, and sets the communication channel of the second wireless communication unit 120 to the second channel CH17, During the first sub transmission slot T-Slot1, battery data is received from the monitor node 200-N using both the first channel and the second channel. In addition, the manager control unit 140 sets the communication channel of the first wireless communication unit 110 to the third channel CH13 during the second sub transmission slot T-Slot2, and sets the communication channel of the second wireless communication unit 120 After setting to the fourth channel CH19, battery data may be received through at least one of the third channel and the fourth channel. The battery data received through the third channel or the fourth channel is data that has failed to be received during a first sub transmission slot (T-Slot1).

In addition, the manager control unit 140 groups the monitor nodes 200-N, allocates a dedicated slot for each group in the first sub transmission slot T-Slot1, and the second sub transmission slot T-Slot2 Allocates dedicated slots for each group in The manager control unit 140 generates configuration information for channels used in each dedicated slot. The manager control unit 140 generates allocation information including information of a dedicated slot allocated to the monitor node 200-N and channel setting information of the dedicated slot, and the first wireless communication unit 110 and the second wireless communication unit 120 ) To transmit the allocation information to the corresponding monitor node 200-N.

13 is a flowchart illustrating a method of allocating a dedicated slot in a manager node according to an embodiment of the present invention.

Referring to FIG. 13, when initial network setup is performed, the manager control unit 140 sends a message requesting participation in a local area network and identification information to at least one of the first wireless communication unit 110 and the second wireless communication unit 120. It broadcasts by using (S1301). Then, the manager control unit 140 starts counting the time (S1303). The manager node 100 may broadcast the message during a manager slot.

Next, the manager control unit 140 monitors whether a participation response is received from each of the monitor nodes 200-N in the first wireless communication unit 110 and the second wireless communication unit 120 (S1305). When the participation response is received, the manager control unit 140 checks the identification information (eg, MAC address) of the corresponding monitor node 200-N, and stores the identification information of the monitor node 200-N in the manager storage unit 130 Record on the participation list of

The manager control unit 140 checks whether the counted time has reached a preset expiration time, and if it does not arrive (no in S1307), it re-proaches step S1305 to wait for a response to be received.

On the other hand, when the counted time reaches the expiration time (yes in S1307), the manager control unit 140 checks the number of monitor nodes recorded in the participation list, and the monitor node 200-N participating in the short-range wireless network Check the number of. In addition, the manager control unit 140 groups the monitor nodes so that a plurality of groups having as many members as the number (eg, two) of the wireless communication units 110 and 120 are generated (S1309). The manager control unit 140 may group each of the monitor nodes 200 -N based on an order of reception of participation responses or at random.

Subsequently, the manager controller 140 allocates a dedicated slot for each group in the first sub-transmission slot T-Slot1, and allocates a dedicated slot for each group in the second sub-transmission slot T-Slot2 (S1311). The manager control unit 140 divides the first sub-transmission slot (T-Slot1) by the number obtained by multiplying the number of groups and the number of wireless communication units 110 and 120 to generate a plurality of dedicated slots, and divides the plurality of dedicated slots. You can allocate an equal number to each group. In addition, the manager controller 140 may generate a plurality of dedicated slots by equally dividing the second sub-transmission slot T-Slot2 by the number of groups, and individually allocate each dedicated slot to the group. In another embodiment, the manager control unit 140 divides the second sub-transmission slot T-Slot2 by the multiplied number as the first sub-transmission slot T-Slot1 to generate a plurality of dedicated slots. And, a plurality of dedicated slots may be allocated to each group in an equal number.

In addition, the manager control unit 140 uses different channels for the monitor nodes belonging to the same group at the same transmission timing (that is, during the same dedicated slot) to determine which one of the first wireless communication unit 110 and the second wireless communication unit 120 In order to communicate with Hana, channels for each dedicated slot are set (S1313).

Subsequently, the manager control unit 140 generates allocation information for each monitor node, including allocated dedicated slot information (eg, start point and end point) and channel setting information of the dedicated slot, and generates the allocation information for each monitor node 200-N. ) To transmit (S1315).

Until the communication channel of each dedicated slot is set, the manager node 100 and the monitor node 200 -N may communicate with each other using a preset default channel. That is, the manager control unit 140 sets the communication channel of the first wireless communication unit 110 or the communication channel of the second wireless communication unit 120 as a preset default channel, and communicates with the monitor node 200-N, Request messages, participation responses, and assignment information can be transmitted or received. In addition, after transmitting the allocation information, the manager controller 140 may set a communication channel of the first wireless communication unit 110 as a first channel and set a communication channel of the second wireless communication unit 120 as a second channel. . The default channel of the first wireless communication unit 110 may be a first channel, and the default channel of the second wireless communication unit 120 may be a second channel. Also, the default channel of the monitor node 200 -N may be one of a first channel and a second channel.

Meanwhile, according to an embodiment, when the time corresponding to the second sub-transmission slot (T-Slot2) arrives, the manager controller 140 changes the communication channel of the first wireless communication unit 110 from the first channel to the third channel. And the communication channel of the second wireless communication unit 120 is changed from the second channel to the fourth channel. In addition, in an embodiment, when the time corresponding to the first sub transmission slot (T-Slot1) arrives, the manager control unit 140 changes the communication channel of the first wireless communication unit 110 to the first channel, The communication channel of the second wireless communication unit 120 is changed to a second channel. That is, according to an embodiment, the manager control unit 140 alternates between the first sub transmission slot (T-Slot1) period and the second sub transmission slot (T-Slot2) period, so that the first wireless communication unit 110 The communication channels of may be alternately set as the first channel and the third channel, and the communication channels of the second wireless communication unit 120 may be alternately set as the second channel and the fourth channel.

In another embodiment, the manager control unit 140 selectively selects the communication channel of the first wireless communication unit 110 or the second wireless communication unit during the transmission slot (T-Slot2) only when data omission (ie, non-reception of battery data) occurs. The communication channel of the communication unit 120 may be changed.

14 is a flowchart illustrating a method of changing a channel by a manager node according to data loss according to another embodiment of the present invention.

Referring to FIG. 14, the manager control unit 140 initially sets a communication channel of the first wireless communication unit 110 as a first channel and sets a communication channel of the second wireless communication unit 120 as a second channel ( S1401, S1403). Subsequently, the manager control unit 140 checks whether the data collection period has arrived and, when it arrives (S1405), broadcasts a message requesting the report of battery data during the manager slot to all the monitor nodes 200-N (S1407). ). At this time, the manager control unit 140 may broadcast the message using both the first wireless communication unit 110 and the second wireless communication unit 120.

Subsequently, during the first sub transmission slot (T-Slot1), the manager control unit 140, through the first channel of the first wireless communication unit 110 and the second channel of the second wireless communication unit 120, each monitor node ( 200-N) battery data is received (S1409). Next, the manager controller 140 determines whether batteries have been received from all the monitor nodes 200-N during the first sub transmission slot T-Slot1. That is, the manager control unit 140 determines whether the reception of battery data is omitted during the first sub transmission slot T-Slot1 (S1411). The manager controller 140 may determine whether data omission has occurred by checking whether data has been received from all monitor nodes 200-N registered in the participation list.

When data loss occurs, the manager control unit 140 changes the communication channel of the first wireless communication unit 110 from the first channel to the third channel, and changes the communication channel of the second wireless communication unit 120 from the second channel. Change to 4 channels (S1413, S1415). In addition, during the second sub transmission slot (T-Slot2), the manager control unit 140 uses one or more of the third channel of the first wireless communication unit 110 and the fourth channel of the second wireless communication unit 120, The generated battery data may be received from the corresponding monitor node 200-N (S1417). When the second sub transmission slot (T-Slot2) elapses, the manager control unit 140 changes the communication channel of the first wireless communication unit 110 from the third channel to the first channel, and the second wireless communication unit 120 By changing the communication channel from the fourth channel to the second channel, each channel is restored to its original state.

The above-described method according to FIG. 14 corresponds to one cycle, and the manager node 100 may repeatedly perform the method according to FIG. 14.

15 is a diagram illustrating a configuration of a monitor node according to an embodiment of the present invention.

As shown in FIG. 15, the monitor node 200 according to an embodiment of the present invention includes a wireless communication unit 210, a monitor storage unit 220, an interface 230, and a monitor control unit 240.

The wireless communication unit 210 sets a communication channel to a channel corresponding to any one frequency among the frequency bands, and performs wireless communication with the first wireless communication unit 110 or the second wireless communication unit 120 of the manager node 100. . The wireless communication unit 210 includes an RF circuit for performing short-range wireless communication.

The monitor storage unit 220 is a storage means such as a memory or a disk device, and stores various programs and data for the monitor node 200 to operate. In particular, the monitor storage unit 220 stores a program (or instruction set) in which an algorithm for executing the operation of the monitor node 200 is defined.

The interface 230 is a component supporting communication connection with the battery module 10 on which the monitor node 200 is mounted, and a bus line, a cable, etc. may be used, or CAN communication may be used. Through the interface 230, the monitor node 200 may acquire battery data generated from the battery module 10.

The monitor control unit 240 is an operation processing device such as a microprocessor and controls the overall operation of the monitor node 200. The monitor control unit 240 may perform wireless communication and channel change according to an embodiment of the present invention after loading data related to a program (or instruction set) stored in the monitor storage unit 220 into a memory.

The monitor control unit 240 acquires various data such as temperature, current, and voltage of the battery module 10 through the interface 230, and measures the analog front end (AFE) of the battery module 10, and checks the state (i.e., diagnostic test), etc. In addition, the monitor controller 240 transmits battery data including one or more of voltage, current, temperature, and self-diagnosis data to the manager node 100 using the wireless communication unit 210.

When receiving the allocation information from the wireless communication unit 210, the monitor control unit 240 checks each dedicated slot information and channel setting information from the allocation information, and determines a plurality of sections corresponding to the dedicated slot information in the transmission slot of the data frame. Is set as a dedicated slot, and the channel used in each dedicated slot is checked based on the channel setting information. Each dedicated slot is shared with other monitor nodes of the same group, and the monitor control unit 240 sets a communication channel of the wireless communication unit 210 so that a channel different from that of the other monitor nodes can be used during the dedicated slot. The monitor control unit 240 checks the channel setting information for identification information of a channel (ie, a main channel) used in the dedicated slot of the first order among the allocated dedicated slots, and corresponds to the channel identification information. The communication channel of (210) is initially set. When the battery data fails to be transmitted during the Nth (N is a natural number) order of dedicated slots, the monitor control unit 240 checks the channel identification information used in the N+1th order of dedicated slots in the channel setting information. , The communication channel of the wireless communication unit 210 is changed to correspond to the channel identification information, and the battery data is transmitted back to the manager node 100 using the wireless communication unit 210 during the N+1th dedicated slot.

The wireless communication unit 210 may use a preset default channel as a communication channel before receiving the allocation information. In this case, the monitor control unit 240 may receive a request message and allocation information from the manager node 100 using the wireless communication unit 210 set as a default channel and transmit a participation response to the manager node 100. The default channel of the wireless communication unit 210 may be a first channel or a second channel.

16 is a flowchart illustrating a method of transmitting battery data from a monitor node according to an embodiment of the present invention.

Referring to FIG. 16, when the wireless communication unit 210 receives allocation information from the manager node 100, the monitor control unit 240 checks each dedicated slot information and channel setting information from the allocation information. The monitor control unit 240 sets a plurality of sections corresponding to the dedicated slot information in the transmission slot of the data frame as dedicated slots of the monitor node 200. A plurality of dedicated slots set by the monitor control unit 240 are shared with other monitor nodes of the same group. In addition, the monitor control unit 240 checks a channel used in each dedicated slot based on the channel setting information, and sets a communication channel of the wireless communication unit 210 as a channel used during the first dedicated slot. In the description with reference to FIG. 16, the monitor control unit 240 includes a first dedicated slot 41, a second dedicated slot 42, and a seventh dedicated slot as shown in FIGS. 4, 7, 9, and 10 among data frames. The dedicated slot of the monitor node 200 is allocated in the order of (47), and the first channel CH11 is used during the first dedicated slot, and the second channel CH17 is used during the second dedicated slot, It is exemplified that the fourth channel CH19 is used during the seventh dedicated slot.

When the wireless communication unit 210 receives a message requesting data report from the manager node 100, the monitor control unit 240 checks the collected battery data using the interface 230, and the dedicated slot ( That is, during the first dedicated slot), the battery data is transmitted to the manager node 100 through a first channel formed between the wireless communication unit 210 and the first wireless communication unit 110 of the manager node 100 (S1601). . The first dedicated slot is shared with other monitor nodes of the same group, and the wireless communication unit 210 uses a first channel CH11 different from the second channel CH17 formed by the other monitor node. ) To communicate.

Subsequently, the monitor control unit 240 checks whether an ACK is received from the wireless communication unit 210 (S1603). That is, the monitor control unit 240 checks whether an ACK indicating that the battery data has been normally received has been received by the wireless communication unit 210.

If the ACK is not received within a predetermined time, the monitor control unit 240 checks a channel (ie, a second channel) used in a second dedicated slot (ie, a second dedicated slot), and the wireless communication unit 210 The communication channel of is changed from the first channel CH11 to the second channel CH17 (S1605). And the monitor control unit 240 is the battery data through a second channel formed between the wireless communication unit 210 and the second wireless communication unit 120 of the manager node 100 during the second dedicated slot (ie, the second dedicated slot). Is retransmitted to the manager node 100 (S1607).

Subsequently, the monitor control unit 240 checks whether an ACK indicating that the battery data has been normally received has been received by the wireless communication unit 210 (S1609). If the ACK is not received within a predetermined time, the monitor control unit 240 checks a channel (ie, a fourth channel) used in a third order dedicated slot (ie, a seventh dedicated slot), and the wireless communication unit 210 The communication channel of is changed from the second channel to the fourth channel (S1611). And the monitor control unit 240 is the battery data through a fourth channel formed between the wireless communication unit 210 and the second wireless communication unit 120 of the manager node 100 during the third dedicated slot (ie, the seventh dedicated slot). Is transmitted to the manager node 100 again (S1613).

When the transmission of battery data fails during the last dedicated slot, the monitor control unit 240 may output the error message and request the administrator to check the battery management system.

The method according to FIG. 16 corresponds to one cycle, and the monitor node 200 may repeatedly perform the procedure according to FIG. 16 each time battery data is transmitted.

Those skilled in the art to which the present invention pertains will appreciate that the above-described present invention can be implemented in other specific forms without changing the technical spirit or essential features thereof.

Also, the methods described herein may be implemented, at least in part, using one or more computer programs or components. This component may be provided as a series of computer directives through a computer-readable medium or a machine-readable medium including volatile and non-volatile memory. The directives may be provided as software or firmware, and may, in whole or in part, be implemented in a hardware configuration such as ASICs, FPGAs, DSPs, or other similar devices. The directives may be configured to be executed by one or more processors or other hardware configurations, wherein the processor or other hardware configurations perform or perform all or part of the methods and procedures disclosed herein when executing the series of computer directives. To be able to do it.

Therefore, it should be understood that the embodiments described above are illustrative in all respects and not limiting. The scope of the present invention is indicated by the claims to be described later rather than the detailed description, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention. do.

10: battery module 100: manager node
110: first wireless communication unit 120: second wireless communication unit
130: manager storage unit 140: manager control unit
200: monitor node 210: wireless communication unit
220: monitor storage unit 230: interface
240: monitor control unit

Claims (18)

A manager node for acquiring battery data from a plurality of monitor nodes using a first channel and a second channel, which are wireless communication-based communication channels;
A first monitor node collecting first battery data and transmitting the first battery data to the manager node through the first channel during a first dedicated slot; And
And a second monitor node for collecting second battery data and transmitting the second battery data to the manager node through the second channel during the first dedicated slot. The method of claim 1,
When the transmission through the first channel fails, the first monitor node changes the communication channel to the second channel and retransmits the first battery data to the manager node through the second channel during a second dedicated slot. and,
When the transmission through the second channel fails, the second monitor node changes the communication channel to the first channel and transfers the second battery data to the manager node through the first channel during the second dedicated slot. Retransmit wireless battery management system. The method of claim 2,
When the transmission through the second channel fails, the first monitor node changes the communication channel to a fourth channel and transmits the first battery data back to the manager node through the fourth channel during a third dedicated slot. and,
When the transmission through the first channel fails, the second monitor node changes the communication channel to a third channel and returns the second battery data to the manager node through the third channel during the third dedicated slot. Transmission wireless battery management system. The method of claim 3,
The manager node,
During the third dedicated slot, the wireless battery management system changes the first channel to the third channel and changes from the second channel to the fourth channel. The method of claim 3,
The first monitor node and the second monitor node,
A wireless battery management system that shares the first dedicated slot, the second dedicated slot, and the third dedicated slot among data frames including a plurality of time slots. A first wireless communication unit configured to set a communication channel as a first frequency-based first channel;
A second wireless communication unit configured to set a communication channel as a second frequency-based second channel; And
During a first dedicated slot shared by a first monitor node and a second monitor node, the first battery data is received from the first monitor node using the first wireless communication unit and the second battery data is received from the second wireless communication unit. A manager node including a manager control unit receiving second battery data from the monitor node. The method of claim 6,
The manager control unit,
The first monitor node and the second monitor node are set as a group, and a plurality of dedicated slots shared by the first monitor node and the second monitor node are set and set in a data frame having a predetermined length of time. A manager node that allocates a plurality of dedicated slots to the first monitor node and the second monitor node. The method of claim 7,
The manager control unit,
A manager node configured to set a channel of each dedicated slot for each monitor node so that different channels are used during dedicated slots shared by the first and second monitor nodes. The method of claim 6,
The manager control unit,
If the reception of the first battery data fails during the first dedicated slot, the first battery data is received from the first monitor node using the second wireless communication unit during a second dedicated slot,
If the reception of the second battery data fails during the first dedicated slot, the manager node receives the second battery data from the second monitor node using the first wireless communication unit during the second dedicated slot. The method of claim 9,
The manager control unit,
If reception of the first battery data fails during the second dedicated slot, the first monitor node changes the communication channel of the first wireless communication unit to a third channel, and uses the first wireless communication unit during a third dedicated slot. When receiving the first battery data from and failing to receive the second battery data during the second dedicated slot, the communication channel of the second wireless communication unit is changed to a fourth channel, and the third dedicated slot is performed during the third dedicated slot. 2 A manager node receiving the second battery data from the second monitor node using a wireless communication unit. The method of claim 10,
The manager control unit,
If the reception of the first battery data fails during the third dedicated slot, the first battery data is received from the first monitor node using the second wireless communication unit changed to the fourth channel during a fourth dedicated slot, and If the reception of the second battery data fails during the third dedicated slot, the second battery data is transmitted from the second monitor node using the first wireless communication unit changed to the third channel during the fourth dedicated slot. The receiving manager node. The method of claim 6,
The manager control unit,
A manager node configured to alternately set a communication channel of the first wireless communication unit to the first channel and a third channel, and alternately set a communication channel of the second wireless communication unit to the second channel and the fourth channel. In a monitor node that shares a dedicated slot with other monitor nodes,
A wireless communication unit for wireless communication with the manager node;
An interface connected to the battery module; And
Collects battery data using the interface, sets a communication channel of the wireless communication unit to a first channel different from a communication channel of the other monitor node during a first dedicated slot shared with another monitor node, and sets the first channel A monitor node including a monitor control unit for transmitting the battery data to the manager node through the device. The method of claim 13,
The monitor control unit,
When the transmission of the battery data through the first channel fails, the communication channel of the wireless communication unit is changed from the first channel to a second channel, and the battery data is transferred through the second channel during a second dedicated slot. A monitor node that sends back to the manager node. The method of claim 13,
The monitor control unit,
A monitor node that collects the battery data including one or more of temperature, current, voltage, and self-diagnosis data of the battery module. As a method of transmitting battery data in a wireless battery management system,
Sharing a plurality of dedicated slots with a first monitor node and a second monitor node; And
During the N-th dedicated slot, the first monitor node transmits the first battery data to the manager node through the first channel and the second monitor node transmits the second battery data to the manager node through the second channel. Data transmission method including. The method of claim 16,
The transmitting step,
The first monitor node forms a wireless link with a first wireless communication unit of the manager node through the first channel, and the second monitor node establishes a wireless link with a second wireless communication unit of the manager node through the second channel. Data transmission method to form. The method of claim 16,
The first monitor or the second monitor node, which fails to transmit data during the N-th dedicated slot, performs a channel change and uses the changed channel during the N+1-th dedicated slot to use the first battery data or the second battery data. Data transmission method for retransmitting the data to the manager node.

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