Method for arranging multiple numbered serial numbers in a battery management system used in a power storage system.

Abstract

To provide a method for arranging multiple numbered serial numbers in a battery management system, in which serial numbers are automatically assigned, and the assigned serial numbers become the serial numbers for the battery packs. [Solution] A method for assigning multiple numbered numbers in a battery management system 20 used in a power storage system, wherein the battery management system includes a main battery management device and a plurality of sub-battery management devices. The assignment method includes the steps of: each sub-battery management device transmits notification information via a first communication interface, and each notification information includes an identification code for each sub-battery management device; the main battery management device receives each notification information and obtains each identification code from each received notification information; and the main battery management device performs the assignment step when it determines, while statistically counting the quantities of the plurality of identification codes, that the quantity of the plurality of identification codes is equal to a planned continuous quantity.

Description

Technical Field

[0001] The present invention relates to a power storage system having a battery pack, and particularly to a method of arranging a plurality of serial numbers in a battery management system used in the power storage system.

Background Art

[0002] Conventional power storage systems include a plurality of battery packs, and the plurality of battery packs are connected in series, in parallel, or both in series and in parallel to provide power to a load. Each battery pack has a battery management device, also called a Battery Management Unit (BMU) or a Cell Monitor Unit (CMU). The battery management device detects the state of each battery pack, such as voltage, current, and temperature. The battery management device combines the state of the battery pack with a predetermined number as state information and transmits it via a communication local bus. The number is for identifying from which battery management device of which battery pack the state information is transmitted by a device (e.g., a control computer) that receives the state information. The number is burned into a non-volatile memory in the battery management device when the battery pack is produced. Therefore, when trying to change the number of the battery pack again later, it is necessary to change the number stored in the non-volatile memory by a corresponding burning device. Therefore, inconvenience occurs in the operation of changing the number.

[0003] To address the aforementioned shortcomings, conventional battery packs further include an encoding switch connected to a battery management device, allowing the operator to set the battery management device's number by operating the encoding switch. This makes changing the number even more convenient. However, when operating the encoding switch, the operator must visually observe the numerical code on the encoding switch to set the corresponding number, and there is a high risk of misinterpreting the numerical code. If the encoding switch is installed incorrectly, the status information transmitted by the battery management device will be incorrect, potentially leading to duplication of numbers between the two battery management devices.

[0004] Therefore, the traditional method of assigning numbers is not yet perfect and there is room for improvement. [Overview of the project] [Problems that the invention aims to solve]

[0005] In view of this, the present invention aims to provide a method for arranging multiple numbered serial numbers in a battery management system, in which serialized serial numbers are automatically distributed and the distributed serialized serial numbers become the serialized serial numbers of the battery packs. [Means for solving the problem]

[0006] To achieve the above objective, the present invention provides a method for arranging multiple numbered units in a battery management system, wherein the battery management system includes a main battery management device and a plurality of sub-battery management devices, the main battery management device is connected to the plurality of sub-battery management devices via a first communication interface, the sub-battery management devices are connected sequentially from the first to the last, the first of the plurality of sub-battery management devices is connected to the main battery management device via a second communication interface, and each pair of connected sub-battery management devices is connected via another second communication interface. The arrangement method includes the following steps.

[0007] Step A is that any of the multiple sub-battery management devices transmits notification information to the main battery management device via the first communication interface, and each notification information includes an identification code for each of the multiple sub-battery management devices, the identification codes for each of the multiple sub-battery management devices being different.

[0008] Step B is when the main battery management device receives the notification information transmitted by the plurality of sub-battery management devices and obtains the identity identification code of each sub-battery management device from the received notification information.

[0009] Step C is performed when the main battery management device, while statistically analyzing the quantities of the multiple identity identification codes, determines that the quantity of the multiple identity identification codes is equal to the planned continuous quantity.

[0010] The aforementioned arrangement step includes the following steps:

[0011] Step D1 is when the main battery management device transmits a first setting command to the first of the plurality of sub-battery management devices via the second communication interface, instructing the first of the plurality of sub-battery management devices to assign one of the plurality of numbered numbers.

[0012] Step D2 involves each of the multiple sub-battery management devices, from the second to the last, sequentially assigning one of the multiple numbered serial numbers. When any of the first to the second-to-last sub-battery management devices has completed assigning each of the numbered serial numbers, it transmits a second setting command via the corresponding second communication interface to the next successive sub-battery management device until it has completed assigning the last of the multiple numbered serial numbers to the last sub-battery management device, instructing the next successive sub-battery management device to assign the next of the multiple numbered serial numbers. [Effects of the Invention]

[0013] The effect of the present invention is that, since the main battery management device is only permitted to execute the placement step when it determines that the number of sub-battery management devices is the same as the planned continuous quantity, errors in the number of sub-battery management devices can be avoided. When the placement step automatically distributes numbered sub-battery management devices in order, the problem that is prone to errors when the person in charge sets the numbered devices using a switch can be effectively improved. [Brief explanation of the drawing]

[0014] [Figure 1] This is a schematic diagram showing a power storage system according to a preferred embodiment of the present invention. [Figure 2] This is a schematic diagram showing a battery management system according to the above preferred embodiment of the present invention. [Figure 3] This flowchart shows a method for arranging numbered numbers according to the above preferred embodiment of the present invention. [Figure 4] This flowchart shows the arrangement steps according to the above preferred embodiment of the present invention. [Modes for carrying out the invention]

[0015] To further clarify the present invention, preferred embodiments will be described in detail below with reference to the drawings. As shown in Figures 1 and 2, a power storage system 1 is applied to a method for arranging multiple numbered components in a battery management system 20 according to a preferred embodiment of the present invention. The power storage system 1 is for supplying power to a load (not shown). The load may be, for example, a means of transportation (vehicles such as cars, ships, or airplanes) or a grid. The power storage system 1 may also be applied to an Energy Storage System. The power storage system 1 includes a plurality of battery packs 10 and a battery management system 20.

[0016] The multiple battery packs 10 are connected in series, for example, with the negative terminal of the first battery pack 10a and the positive terminal of the last battery pack 10b being electrically connected to the load's power distribution unit (PDU), but this is not limited to that. Alternatively, the positive terminal of the first battery pack 10a and the negative terminal of the last battery pack 10b may be electrically connected to the power distribution unit as the load. The multiple battery packs 10 may be connected in parallel, or a combination of series and parallel connections, but this is not limited to a series connection. In this embodiment, 12 battery packs 10 are used as an example, but this is not limited to that.

[0017] The battery management system 20 includes a main battery management device 22 and a plurality of sub-battery management devices 24. The main battery management device 22 includes a first transmission module 222 and a second transmission module 224, the first transmission module 222 being connected to a first communication interface 30. In this embodiment, the first transmission module 222 is exemplified by a CAN-bus transmission set, but is not limited to that, and the first communication interface 30 is exemplified by a CAN-BUS, but is not limited to that; it may be an interface for multiple devices to provide communication, such as USB, LIN BUS (Local Interconnect Network BUS), Ethernet, etc. The first communication interface 30 is connected to a control device to control the communication of the devices. For example, if the power storage system 1 is used as a means of transportation, the control device may be, for example, a VCU (Vehicle Control Unit) or a control computer. If the power storage system 1 is used as an energy storage system, the control device may be, for example, an EMS (Energy Management System). The second transmission module 224 is connected to a second communication interface 32. In this embodiment, the second transmission module 224 is an example of an interface transmission module connected in series, and the second communication interface 32 is an example of a communication interface connected in series, such as an RS-485 communication interface, but is not limited to that, and may be RS-232, RS-422, UART, USB, CAN bus, LIN BUS, Ethernet, etc.

[0018] In this embodiment, the number of sub-battery management devices 24 is given as 12, but is not limited to this. Each sub-battery management device 24 is installed in each battery pack 10 and detects the state of each battery pack 10, for example, detecting at least one of voltage, current, and temperature. Each sub-battery management device 24 includes a first transmission module 242, a second transmission module 244, and a third transmission module 246. The first transmission module 242 in each sub-battery management device 24 is given as a CAN-bus transmission set, but is not limited to this. The first transmission modules 242 in the plurality of sub-battery management devices 24 are electrically connected to the first communication interface 30, thereby connecting the main battery management device 22 to the plurality of sub-battery management devices 24 via the first communication interface 30. The second transmission module 244 and the third transmission module 246 in each sub-battery management device 24 are given as series-connected communication transmission modules, but is not limited to this.

[0019] Referring to Figure 2, the first (sub-battery management device 24-1) to the last (sub-battery management device 24-12) of the multiple sub-battery management devices 24 are connected in sequence, and a series connection is adopted in this embodiment. Sub-battery management devices 24-2 to 24-11 are connected in sequence between sub-battery management device 24-1 and sub-battery management device 24-12.

[0020] More specifically, the second transmission module 244 of the first of the multiple sub-battery management devices 24 (sub-battery management device 24-1) is electrically connected to the second communication interface 32, thereby connecting the first of the multiple sub-battery management devices 24 (sub-battery management device 24-1) to the main battery management device 22 via the second communication interface 32. Between each pair of connected sub-battery management devices 24, they are connected via another second communication interface 34; that is, the third transmission module 246 of each sub-battery management device 24 and the second transmission module 244 of the next sub-battery management device 24 are electrically connected to the second communication interface 34. In this embodiment, the second communication interface 34 is a series-connected communication interface, for example, RS-485, but it is not limited to that, and may be RS-232, RS-422, UART, USB, CAN bus, LIN BUS, Ethernet, etc. Each second communication interface 34 and second communication interface 32 are the same. The third transmitting module 246 in the last sub-battery management device 24-12 is not connected to the second communication interface 34. Alternatively, the last sub-battery management device 24-12 does not need to have a third transmitting module 246 installed. Therefore, each of the multiple sub-battery management devices 24 can communicate with the others it is connected to via the corresponding second communication interface 34.

[0021] Each sub-battery management device 24 has an identification code recorded within it. The identification code may be stored in the memory of each sub-battery management device 24. Each identification code represents the unique identification code of each sub-battery management device 24 and / or each battery pack 10. The identification codes are non-continuous and non-repeating, and may, for example, be the production number of each sub-battery management device 24 and / or each battery pack 10, but are not limited to this, and the identification codes of the multiple sub-battery management devices 24 should be different from each other.

[0022] According to the above configuration, the method for arranging the serial numbers of the battery management system 20 according to this embodiment can be realized. The arrangement method is for distributing each serial number to each sub-battery management device 24. Each distributed serial number becomes the serial number of each battery pack 10 in the energy storage system 1. Thereby, the main battery management device 22 can identify each sub-battery management device 24 or each battery pack 10 based on each serial number. Each serial number may include one or a combination of a plurality of numbers, letters, symbols, characters, etc. For example, the serial number may be in the form of a sequence of numbers. Each serial number may be in binary notation, decimal notation, hexadecimal notation, or any other radix notation. The value of the serial number may increase or decrease. Or, the plurality of serial numbers may be a sequence of a plurality of letters. Taking 12 English letters as an example, the order of the letters in the serial number may increase (for example, A to L) or decrease (L to A), for example, increase or decrease according to the value of the ASCII code of the letter. Also, a number is one aspect of the serial numbers in the present invention.

[0023] The arrangement method according to this embodiment is executed every time power is supplied (Power on) to the main battery management device 22 and the sub-battery management device 24. In other words, when power is turned off and then powered on again, the arrangement method of the serial numbers is executed again so that the serial numbers are distributed again. The arrangement method includes the following steps shown in FIGS. 3 and 4. Hereinafter, the serial numbers will be described by taking numbers as an example.

[0024] In step S11, each sub-battery management device 24 transmits notification information to the main battery management device 22 via the first communication interface 30. Each notification information includes the identity code of each sub-battery management device 24.

[0025] In this embodiment, the notification information is, for example, information broadcast to the first communication interface 30. Each sub-battery management device 24 transmits notification information containing the identity identification code of each sub-battery management device 24 via the first communication interface 30. Since each sub-battery management device 24 has not yet been assigned a number, the notification information does not contain a number. In one embodiment, if the sub-battery management device 24 already has a number assigned to it when it was last powered on stored in its memory, the sub-battery management device 24 first deletes the existing number before transmitting the notification information. In another embodiment, if the sub-battery management device 24 already has a number assigned to it when it was last powered on stored in its memory, the sub-battery management device 24 does not add the existing number to the content of the notification information before transmitting it.

[0026] In step S12, the main battery management device 22 receives notification information transmitted by each sub-battery management device 24 and obtains the identity identification code of each sub-battery management device 24 from the received notification information.

[0027] In this embodiment, the main battery management device 22 receives the multiple notification information from the first communication interface 30 and analyzes the notification information to obtain the identity identification code among them.

[0028] In step S13, the main battery management device 22 performs the arrangement step S14 shown in Figure 4 if it determines, while statistically analyzing the quantities of the multiple identity identification codes, that the quantities of the multiple identity identification codes are equal to the planned continuous quantity.

[0029] In this embodiment, the main battery management device 22 records the planned continuous quantity and a plurality of predetermined numbering codes. The planned continuous quantity is the total number of sub-battery management devices 24 that are planned to be used continuously in the main battery management device 22, that is, the total number of battery packs 10 that are set to be used continuously in advance. The planned continuous quantity and the plurality of predetermined numbering codes may be recorded in the memory of the main battery management device 22. For example, if the planned continuous quantity is set to 12, it means that the main battery management device 22 is set in advance to use 12 sub-battery management devices 24 or 12 battery packs 10 continuously. For example, for the aforementioned multiple predetermined numbering numbers, the first predetermined numbering number is 1 (shown in decimal for convenience of explanation, but not limited to this), the second predetermined numbering number to the last predetermined numbering number increase sequentially, i.e., 2 to 12 (shown in decimal for convenience of explanation, but not limited to this), with 12 being the maximum value, and the maximum value is the extreme value corresponding to the planned continuous quantity. In this embodiment, the maximum value is equal to the planned continuous quantity. In practice, the first predetermined numbering number is not limited to 1, but may be any initial value, for example, 0. Then, the last predetermined numbering number becomes 11, and although the numerical value is not equal to the planned continuous quantity of 12, the last predetermined numbering number becomes 11, which means the 12th predetermined numbering number, i.e., corresponds to the planned continuous quantity. For example, the predetermined numbering numbers are the English letters A to L, and the last predetermined numbering number L means the 12th predetermined numbering number, and L is the extreme value corresponding to the planned continuous quantity. The extrema of a character can be determined, for example, by its ASCII code.

[0030] The main battery management device 22 statistically analyzes the quantity of acquired identity identification codes and determines whether the quantity of acquired identity identification codes is equal to the planned continuous quantity.

[0031] If the determination is "no," that is, if the quantity of the multiple identity identification codes is not equal to the planned continuous quantity, it means that the quantity of the sub-battery management device 24 or battery pack 10 currently connected to the main battery management device 22 is inaccurate, and the main battery management device generates a warning. The warning information is transmitted via the first communication interface 30 to notify the control device that the quantity of the sub-battery management device 24 or battery pack 10 is inaccurate.

[0032] If the determination is yes, it means that the quantity of the sub-battery management device 24 or battery pack 10 currently connected to the main battery management device 22 is correct, and the placement step S14 is executed. The placement step S14 includes the following steps.

[0033] In step S141, the main battery management device 22 transmits a first setting command to the first of the multiple sub-battery management devices 24 (sub-battery management device 24-1) once or more times via the second communication interface 32, thereby commanding the first of the multiple sub-battery management devices 24 to assign a number.

[0034] In this embodiment, the first setting command includes the first of the plurality of predetermined numbering numbers, that is, its value is 1. When the first sub-battery management device 24-1 receives the first setting command, it sets that numbering number as the first predetermined numbering number specified in the first setting command.

[0035] Step S142 is performed when the assignment of each numbered sub-battery management device 24 has been completed sequentially from the first (sub-battery management device 24-1) to the second (last) (sub-battery management device 24-11) among the multiple sub-battery management devices 24, until the assignment of the numbered sub-battery management device 24 has been completed for the last (sub-battery management device 24-12) among the multiple sub-battery management devices 24, by sending a second setting command once or more times via the corresponding second communication interface 34 to the next consecutive sub-battery management device 24, instructing the next consecutive sub-battery management device 24 to assign the next numbered sub-battery management device 24. Step S142 can be performed to sequentially assign one of the multiple numbered sub-battery management devices 24 from the second (sub-battery management device 24-2) to the last (sub-battery management device 24-12) among the multiple sub-battery management devices 24.

[0036] In this embodiment, the assigned number of the sub-battery management device 24 becomes n, and the sub-battery management device 24 that has assigned the assigned number specifies a predetermined assigned number in the second setting command, and the predetermined assigned number increases from the assigned number that has already been assigned, that is, the predetermined assigned number becomes n+m. In this embodiment, m=1, however, it is not limited to this, and m can be an integer of 1 or more, as long as the predetermined assigned number in the second setting command matches the predetermined assigned number recorded in the main battery management device 22. When the sub-battery management device 24 receives the second setting command, it assigns that number as the predetermined assigned number specified in the second setting command.

[0037] For example, according to the series connection order, the second sub-battery management device 24-2 is connected in series with the first sub-battery management device 24-1. Therefore, the first sub-battery management device 24-1 transmits a second setting command to the second sub-battery management device 24-2 via the continuous second communication interface 34, and the predetermined numbering included in the second setting command is 2. The second sub-battery management device 24-2 sets the numbering to 2.

[0038] Next, the second sub-battery management device 24-2 transmits a second setting command to the third sub-battery management device 24-3 via the second communication interface 34, and the predetermined numbering number included in the second setting command is 3. The third sub-battery management device 24-3 sets its numbering number to 3.

[0039] From the third sub-battery management device 24-3 to the second-to-last sub-battery management device 24-11, each transmits the second setting command to the next successive sub-battery management device 24 via the continuous second communication interface 34 in the same manner. Of these, the second-to-last sub-battery management device 24-11 transmits the second setting command to the last sub-battery management device 24-12. If the last sub-battery management device 24-12 sets its assigned number to the predetermined assigned number 12 specified in the second setting command, the third transmitting module 246 in the sub-battery management device 24-12 is not continuous with the second communication interface 34, and therefore the sub-battery management device 24-12 will not transmit the second setting command. However, this is not always the case. The sub-battery management device 24-12 may output the second setting command from the third transmitting module 246. Furthermore, each sub-battery management device 24 can use the same programming code, eliminating the need to create a dedicated program for each sub-battery management device 24-12.

[0040] In one embodiment, the sub-battery management device 24 stores the assigned number that was assigned when the device was last powered on, and if the existing assigned number has not yet been deleted in step S11, the assigned number in step S14 overwrites the existing assigned number with the assigned number. Alternatively, if the existing assigned number and the assigned number are the same, the existing assigned number is reserved as the new assigned number.

[0041] Furthermore, in order for the main battery management device 22 to determine whether the assignment of numbered units to the multiple sub-battery management devices 24 has been completed, when the main battery management device 22 sends a first setting command, it also sends one or more inquiry pieces of information via the first communication interface 30. The inquiry pieces of information are for inquiring whether the assignment of numbered units to each sub-battery management device 24 has been completed. When each sub-battery management device 24 that has been assigned a numbered unit receives the inquiry pieces of information, it sends a response to the main battery management device 22 via the first communication interface 30. The response pieces of information include the numbered units of each sub-battery management device 24 that has been assigned a numbered unit. In one embodiment, in step S141, the main battery management device 22 sends multiple first setting commands to the first sub-battery management device 24-1 via the second communication interface 32. When the main battery management device receives any of the response pieces of information, it stops sending the first setting commands. In other words, when response information is received from the first sub-battery management device 24-1 or another sub-battery management device 24, it can be determined that the assignment of the numbering for one of the sub-battery management devices 24 has already been completed, and therefore the first setting command is not sent again. In one embodiment, in step S141, the main battery management device 22 sends a plurality of first setting commands to the second sub-battery management device 24-1 via the second communication interface 32, and when the number of times the first setting command has been sent reaches a predetermined number, the first setting command is not sent again.

[0042] The numbering of the multiple sub-battery management devices 24 is done in order from the first sub-battery management device 24-1 to the last sub-battery management device 24-12, so the value of the numbering in the response information received from the main battery management device 22 increases. The last sub-battery management device 24-12 will have the maximum numbering value in the response information it provides when its placement is complete. In this embodiment, the maximum value is equal to or corresponds to the planned continuous quantity. When the main battery management device determines that the numbering in any of the received response information is equal to the maximum value (for example, 12) or corresponds to the planned continuous quantity, it stops sending the inquiry information so that the placement step S14 is completed.

[0043] In this embodiment, the main battery management device 22 transmits multiple inquiry pieces of information via the first communication interface 30 over a predetermined period of time. If the response information for a numbering system equal to the maximum value is still not received after the predetermined period, it means that assigning the numbering system to a certain sub-battery management device 24 will fail, and the main battery management device 22 will generate a warning to allow the assignment step S14 to be completed. The warning information can be transmitted via the first communication interface 30 and warns the control device that the assignment of the battery pack numbering system has failed. The predetermined period of time may be calculated from, for example, the date the first setting command is transmitted. The predetermined period of time may be set in advance to be greater than the time required to assign the numbering system to the multiple sub-battery management devices 24. For example, if the time required to assign the numbering system to each sub-battery management device 24 is 500ms, the predetermined period of time may be set to be greater than or equal to 6 seconds (500ms × 12), for example, 6 to 12 seconds. The predetermined time and the time required to assign a number to each sub-battery management device 24 are merely examples and are not limited to the times mentioned above. In one embodiment, it is not necessary to set a predetermined time.

[0044] In this embodiment, the main battery management device 22 adds the recorded plurality of predetermined numbering numbers to the inquiry information to be transmitted. The sub-battery management device 24, which has assigned the numbering numbers, transmits the answer information to the main battery management device 22 via the first communication interface 30 if the numbering number matches one of the plurality of predetermined numbering numbers. The main battery management device 22 stops transmitting the inquiry information and completes the assignment step S14 if it determines that the numbering number of any of the received answer information is equal to the maximum value. Alternatively, in this embodiment, the transmission of the inquiry information and completion of the assignment step S14 is achieved if the numbering number of any of the received answer information is equal to or corresponds to the planned continuous quantity.

[0045] If each sub-battery management device 24 is assigned a number, it can communicate with the main battery management device 22 via the first communication interface 30. For example, it can transmit the status of each battery pack 10 to the main battery management device 22 via the first communication interface 30.

[0046] Next, the main battery management device 22 transmits completion information via the first communication interface 30, notifying that the assignment of the numbering system for the control device battery management system 20 has been completed.

[0047] In one embodiment, the main battery management device 22 adds a predetermined numbering number with the maximum value (equal to the planned continuous quantity in this embodiment), which is the last predetermined numbering number recorded, to the inquiry information transmitted once or multiple times. When the numbering number is assigned to the last sub-battery management device 24-12, if the assigned number matches the predetermined numbering number, the last sub-battery management device 24-12 transmits response information to the main battery management device 22 via the first communication interface 30. When the main battery management device 22 receives the response information, it stops transmitting the inquiry information, completing the assignment step S14. Therefore, only the last sub-battery management device 24-12 transmits response information, reducing the amount of response information transmitted via the first communication interface 30. Selectively, the response information includes the numbering number of the last sub-battery management device 24-12, and when the main battery management device 22 receives the response information, it stops transmitting the inquiry information if it determines that the numbering number in the received response information is equal to the maximum value.

[0048] In one embodiment, the main battery management device 22 transmits inquiry information at least once via the first communication interface 30. For example, the main battery management device 22 may transmit inquiry information only once after a predetermined time has elapsed since transmitting the first setting command. The predetermined time may be set in advance to be greater than the time required to assign numbered numbers to the plurality of sub-battery management devices 24. The inquiry information may include all predetermined numbered numbers. In this case, when the inquiry information is received after the numbered numbers have been assigned to the plurality of sub-battery management devices 24, the response information is sent back via the first communication interface 30 for each device. Alternatively, the inquiry information may include the last predetermined numbered number. In this case, when the inquiry information is received after the numbered number has been assigned to the last sub-battery management device 24-12, the response information is sent back via the first communication interface 30.

[0049] In one embodiment, in step S141, the main battery management device 22 transmits inquiry information at least once via the first communication interface 30. The inquiry information includes the first predetermined numbering number (for example, 1) among the plurality of predetermined numbering numbers. The first of the sub-battery management devices 24 (sub-battery management device 24-1) transmits reply information to the main battery management device 22 via the first communication interface 30 if its numbering number matches the first predetermined numbering number in the inquiry information. The reply information includes the numbering number of the first of the plurality of sub-battery management devices 24. Thus, when the main battery management device 22 receives the reply information from the first sub-battery management device, it knows that the numbering number has been assigned to the first sub-battery management device 24.

[0050] Next, in step S142, the main battery management device 22 sequentially transmits a plurality of other inquiry pieces via the first communication interface 30. Each of the plurality of other inquiry pieces includes one predetermined number from the second predetermined number (for example, 2) to the last predetermined number (for example, 12) among the plurality of predetermined numbering numbers. Each sub-battery management device 24 that has assigned each number sends other answer information via the first communication interface 30 to the main battery management device 22 if the number matches the predetermined number in each of the other inquiry pieces. The other answer information includes the number of each sub-battery management device 24 that has assigned each number. As a result, when a number has been assigned to each sub-battery management device from the second sub-battery management device 24-2 to the last sub-battery management device 24-12, the main battery management device 22 will sequentially receive the other answer information of the sub-battery management devices 24 that have assigned numbers. This indicates that the assignment of numbering numbers to each sub-battery management device 24 has been completed. When the main battery management device 22 determines that the assigned number in the other received response information is equal to the last predetermined assigned number, it means that the assignment of the last assigned number in the plurality of sub-battery management devices is complete, and the assignment step is completed.

[0051] In the above, the values ​​of the multiple predetermined numbering numbers recorded in the main battery management device 22 were given as an example of increasing values ​​from the first predetermined numbering number to the last predetermined numbering number, but this is not limited to this. In one embodiment, it may be decreased. In this case, the value of the first predetermined numbering number is the maximum value (12 as an example), the value of the last predetermined numbering number is the minimum value (1 as an example), and the minimum value is the extreme value corresponding to the planned continuous quantity. In step S141, the first setting command includes the first predetermined numbering number of the multiple predetermined numbering numbers (12 as an example). In step S142, when the sub-battery management device that has placed the numbering numbers includes the predetermined numbering number specified in the second setting command, it decreases from the placed numbering number n, that is, the predetermined numbering number specified in the second setting command becomes nm, with m=1 as an example, but m may be an integer of 1 or more. When the main battery management device 22 determines that the assigned number in the received response information is the minimum value (i.e., the extreme value corresponding to the planned continuous quantity), it means that the assignment of the last assigned number to the multiple sub-battery management devices 24 is complete, and the assignment step is completed.

[0052] As described above, the method of assigning serial numbers in the battery management system 20 according to the present invention automatically distributes serial numbers sequentially to the sub-battery management device 24 in the battery pack 10 in a continuous order, improving the problem that errors are likely to occur when an operator sets the serial numbers using a switch. Even if one or more battery packs 10 have been replaced, or if the battery packs 10 have been moved, by connecting the second communication interface 32 and the second communication interface 34 and re-energizing, the serial numbers of the sub-battery management device 24 can be redistributed, eliminating the need for the operator to re-set the serial numbers via a switch.

[0053] Furthermore, the main battery management device 22 assigns a numbered number only when it determines that the quantity in the sub-battery management device 24 (i.e., the number of battery packs) matches a predetermined continuous quantity. Therefore, if the quantity of battery packs 10 does not match continuously, it is possible to avoid errors in the voltage and current from the power storage system by not assigning a numbered number.

[0054] The above description is merely a preferred embodiment of the present invention, and any equivalent substitutions made by applying the claims together with the specification of the present invention should be included within the scope of the claims of the present invention. [Explanation of Symbols]

[0055] 1. Power storage system 10, 10a, 10b battery packs 20 Battery Management System 22 Main battery management device 222 First transmission module 224 Second Transmitter Module 24, 24-1~24-12 Sub-battery management device 242 First transmission module 244 Second Transmitter Module 246 Third Transmitter Module 30 First Communication Interface 32 Second communication interface 34 Second communication interface Steps S11-S13, S141, S142 S14 Placement Step

Claims

1. A method for arranging multiple numbered serial numbers in a battery management system, The battery management system includes a main battery management device and a plurality of sub-battery management devices, wherein the main battery management device is connected to the plurality of sub-battery management devices via a first communication interface, the sub-battery management devices are connected sequentially from the first to the last, the first of the plurality of sub-battery management devices is connected to the main battery management device via a second communication interface, and each pair of connected sub-battery management devices is connected via another second communication interface. The aforementioned arrangement method is, Step A, wherein any of the multiple sub-battery management devices transmits notification information to the main battery management device via the first communication interface, and each notification information includes an identification code for each of the multiple sub-battery management devices, and each of the identification codes for the multiple sub-battery management devices is different. The main battery management device receives the notification information transmitted by the plurality of sub-battery management devices, and in step B, obtains the identity identification code of each sub-battery management device from the received notification information. The main battery management device includes step C, which, while statistically analyzing the quantities of the plurality of identity identification codes, executes the placement step when it determines that the quantity of the plurality of identity identification codes is equal to the planned continuous quantity. The aforementioned arrangement step is, Step D1: The main battery management device transmits a first setting command to the first of the plurality of sub-battery management devices via the second communication interface, instructing the first of the plurality of sub-battery management devices to assign one of the plurality of numbered numbers. A method for arranging a plurality of assigned numbers in a battery management system, comprising step D2, wherein each of the plurality of sub-battery management devices, from the second to the last, sequentially assigns one of the plurality of assigned numbers, and when any of the plurality of sub-battery management devices, from the first to the second from the last, has completed assigning each of the assigned numbers, it transmits a second setting command to the next successive sub-battery management device via the corresponding second communication interface until the last of the plurality of sub-battery management devices has completed assigning the last of the plurality of assigned numbers, thereby commanding the next successive sub-battery management device to assign the next of the plurality of assigned numbers.

2. The aforementioned arrangement step is, The main battery management device transmits inquiry information at least once via the first communication interface, and A method for arranging a plurality of numbered serial numbers in a battery management system according to claim 1, characterized in that each sub-battery management device to which one of the plurality of numbered serial numbers is assigned receives the inquiry information, and when each sub-battery management device to which one of the plurality of numbered serial numbers is assigned receives the inquiry information, it transmits response information to the main battery management device via the first communication interface, and each of the response information includes each of the numbered serial numbers of each sub-battery management device to which one of the plurality of numbered serial numbers is assigned.

3. The aforementioned inquiry information includes a plurality of predetermined numbering numbers, The method for arranging a plurality of numbered serial numbers in a battery management system according to claim 2, wherein each of the sub-battery management devices to which each of the numbered serial numbers is assigned transmits each of the response information to the main battery management device via the first communication interface when each of the numbered serial numbers matches one of the plurality of predetermined numbered serial numbers.

4. The main battery management device transmits a plurality of inquiry pieces via the first communication interface. The plurality of predetermined numbering numbers have extreme values ​​corresponding to the planned consecutive quantities, The method for arranging a plurality of numbered serial numbers in a battery management system according to claim 3, characterized in that the main battery management device stops transmitting the inquiry information when it determines that the serial number in any of the received response information is equal to the extreme value.

5. The method for arranging multiple numbered numbers in a battery management system according to claim 4, characterized in that the main battery management device transmits a plurality of inquiry pieces via the first communication interface over a predetermined period of time, and if the predetermined period of time has elapsed but no response piece equal to the numbered number at the extreme value has been received, a warning piece is generated.

6. The method for arranging a plurality of numbered numbers in a battery management system according to claim 2, characterized in that the main battery management device transmits a plurality of inquiry information via the first communication interface.

7. The method for arranging a plurality of numbered serial numbers in a battery management system according to claim 6, characterized in that the main battery management device stops transmitting the inquiry information when it determines that the numbered serial number in any of the received response information corresponds to the planned continuous quantity.

8. The method for arranging a plurality of numbered numbers in a battery management system according to claim 2, characterized in that in step D1, the main battery management device transmits a plurality of the first setting commands to the first of the plurality of sub-battery management devices via the second communication interface.

9. The method for arranging a plurality of numbered numbers in a battery management system according to claim 8, characterized in that the main battery management device stops transmitting the first setting command when it receives any of the aforementioned response information.

10. The aforementioned arrangement step is, The main battery management device transmits inquiry information at least once via the first communication interface, and the inquiry information includes a predetermined numbering number corresponding to the planned continuous quantity, and A method for arranging multiple numbered serial numbers in a battery management system according to claim 1, characterized in that, if the last numbered serial number in the plurality of sub-battery management devices matches the predetermined numbered serial number, the response information is transmitted to the main battery management device via the first communication interface, and when the main battery management device receives the response information, the transmission of the inquiry information is stopped.

11. The main battery management device has a number of predetermined assigned numbers recorded in it. In step D1, the first setting command includes the first of the plurality of predetermined numbering numbers, and the first of the plurality of sub-battery management devices sets the numbering number as the first predetermined numbering number in the first setting command. A method for arranging a plurality of numbered serial numbers in a battery management system according to claim 1, characterized in that in step D1, the main battery management device transmits inquiry information at least once via the first communication interface, the inquiry information includes the first predetermined serial number, and the first of the plurality of sub-battery management devices transmits response information via the first communication interface to the main battery management device if the serial number matches the first predetermined serial number in the inquiry information, the response information includes the serial number of the first of the plurality of sub-battery management devices.

12. In step D2, the main battery management device sequentially transmits a plurality of other inquiry pieces via the first communication interface, each of which includes the second to the last predetermined numbering number among the plurality of predetermined numbering numbers, and each of the sub-battery management devices to which each numbering number is assigned transmits other response information to the main battery management device via the first communication interface if the numbering number matches each of the predetermined numbering numbers in each of the other inquiry pieces, and the other response information includes the numbering number of each of the sub-battery management devices to which each numbering number is assigned. The arrangement step is completed when the main battery management device determines that the numbering in the received other response information is equal to the last predetermined numbering among the plurality of predetermined numbering numbers, characterized in that the arrangement method for a plurality of numbering numbers in a battery management system according to claim 11.

13. In step C, the main battery management device generates warning information when it determines that the quantity of the plurality of identity identification codes is not equal to the planned continuous quantity, characterized in that a method for arranging a plurality of numbered numbers in a battery management system according to claim 1.

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