Battery information communication system and method

Abstract

A battery information communication system according to an embodiment of the present invention includes a battery information transmitting device configured to acquire first battery information related to a battery, generate conversion information by applying a predetermined conversion rule to the first battery information so as to correspond to a charge / discharge state of the battery, and transmit the conversion information, and a battery information receiving device configured to receive the conversion information from the battery information transmitting device, and reconvert the conversion information so as to correspond to the conversion rule to acquire second battery information corresponding to the first battery information.

Description

[Technical Field]

[0001] This application claims priority based on Korean Patent Application No. 10-2022-0120139, filed on September 22, 2022, the entire contents of which are incorporated herein by reference in their entirety in the specification and drawings thereof.

[0002] The present invention relates to a battery information communication system and method, and more particularly to a battery information communication system and method capable of effectively transmitting and receiving information about a battery. [Background technology]

[0003] In recent years, the demand for portable electronic products such as laptops, video cameras, and mobile phones has grown rapidly, and as the development of electric vehicles, energy storage batteries, robots, satellites, and other products has gained momentum, there has been active research into high-performance batteries that can be repeatedly charged and discharged.

[0004] Currently, commercially available batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, and lithium batteries. Of these, lithium batteries are attracting attention due to their advantages of being able to be freely charged and discharged since they have almost no memory effect compared to nickel-based batteries, as well as their extremely low self-discharge rate and high energy density.

[0005] Such battery information may include a wide variety of information such as terminal voltage, open circuit voltage (OCV), current, state of charge (SOC), state of health (SOH, also called degradation), and resistance. Because such battery information is measured and / or estimated periodically, the amount of battery information over a certain period of time may be enormous. Furthermore, in the case of an electric vehicle or energy storage system (ESS) that includes multiple batteries, the amount of data to be transmitted (total amount of battery information) may be enormous.

[0006] For example, assume that a rack battery management system (RBMS) of an ESS transmits SOC information of each of a plurality of battery modules included in a battery rack to a bank battery management system (BBMS). The following description will be given assuming that the charging of the battery modules is determined based on the SOC information received by the BBMS. Note that the RBMS corresponds to a lower-level controller, and the BBMS corresponds to a higher-level controller.

[0007] Conventionally, in order to transmit each SOC information in 1 byte, the scale has been adjusted to 0.5 before transmission. For example, values less than 0.5% of the decimal point are rounded down, and values 0.5% or more are rounded up to convert the SOC information into an integer before transmission. In this case, there is a problem that the maximum error in the SOC information can be 0.5%.

[0008] For example, when adjusting the power limit according to the SOC value during charging, if the SOC is 50% or higher, the power limit is reduced at SOC values that are actually lower than the reference SOC. This can lead to a problem where the power limit is adjusted to 0 before the reference SOC is reached at the end of charging. In other words, charging may end before the end-of-charging SOC is reached. This is because the scale is 0.25, so the SOC value acquired on the receiving side (e.g., BBMS) may be larger than the actual SOC value estimated on the transmitting side (e.g., RBMS). In other words, because the power limit is adjusted to 0 earlier than it actually is, there is a problem where a capacity less than the actual capacity of the battery may be used.

[0009] Furthermore, when discharging a battery, the power limit is adjusted according to the SOC. However, even in this case, there is a problem that a capacity smaller than the actual capacity of the battery may be used. That is, the discharge may end before reaching the discharge end SOC. This is because the scale is 0.25, so the SOC value acquired on the receiving side (e.g., BBMS) may be smaller than the actual SOC value estimated on the transmitting side (e.g., RBMS). Summary of the Invention [Problem to be solved by the invention]

[0010] The present invention has been devised to solve the above problems, and an object of the present invention is to provide a battery information communication system and method that can prevent loss of usable capacity of a battery.

[0011] Other objects and advantages of the present invention will become apparent from the following description and the embodiments of the present invention, and it will be readily apparent that the objects and advantages of the present invention can be realized by the means and combinations thereof set forth in the claims. [Means for solving the problem]

[0012] A battery information communication system according to one aspect of the present invention may include a battery information transmitting device configured to acquire first battery information related to a battery, generate conversion information by applying a predetermined conversion rule to the first battery information so as to correspond to a charge / discharge state of the battery, and transmit the conversion information, and a battery information receiving device configured to receive the conversion information from the battery information transmitting device, and reconvert the conversion information so as to correspond to the conversion rule to acquire second battery information corresponding to the first battery information.

[0013] The battery information transmitting device may be configured to generate the conversion information by applying a preset first conversion rule if the battery is in a charged state.

[0014] The battery information transmitting device may be configured to generate the conversion information by applying a second preset conversion rule if the battery is in a discharged state.

[0015] The battery information transmission device may be configured to generate the conversion information by truncating decimal points in the weighted values of the battery information based on the first conversion rule.

[0016] The battery information transmitting device may be configured to generate the conversion information according to the first conversion rule based on the following Equation 1:

[0017]

number

[0018] Here, C is the conversion information, K is the first battery information, and n may be a predetermined conversion coefficient.

[0019] The battery information transmission device may be configured to generate the conversion information by rounding up decimal points in the weighted values of the battery information based on the second conversion rule.

[0020] The battery information transmitting device may be configured to generate the conversion information according to the second conversion rule based on the following Equation 2:

[0021]

number

[0022] Here, C is the conversion information, K is the first battery information, and n may be a predetermined conversion coefficient.

[0023] The battery information transmission device may be configured to set the conversion information to a preset discharge end value when the first battery information is less than a preset threshold based on the second conversion rule.

[0024] The battery information receiving device may be configured to obtain the second battery information having a value equal to or less than the first battery information if the battery is in a charged state.

[0025] The battery information receiving device may be configured to obtain the second battery information having a value equal to or greater than the first battery information if the battery is in a discharged state.

[0026] The battery information receiving device may be configured to obtain, as the second battery information, a value obtained by dividing the conversion information by a conversion coefficient multiplied by the first battery information according to the conversion rule.

[0027] The battery information receiving device may be configured to control charging and discharging of the battery based on the second battery information.

[0028] An energy storage system (ESS) according to another aspect of the present invention may include a battery information communication system according to one aspect of the present invention.

[0029] A battery information communication method according to yet another aspect of the present invention may include: a first battery information acquiring step, in a battery information transmitting device, of acquiring first battery information related to a battery; a conversion information generating step, in the battery information transmitting device, of generating conversion information by applying a predetermined conversion rule to the first battery information so as to correspond to a charge / discharge state of the battery; and a second battery information acquiring step, in a battery information receiving device, of reconverting the conversion information so as to correspond to the conversion rule, to acquire second battery information corresponding to the first battery information. [Effects of the Invention]

[0030] According to one aspect of the present invention, since battery information serving as a basis for controlling charging and discharging is determined in accordance with the battery state (charging state or discharging state), it is possible to prevent loss of usable capacity of the battery. That is, a battery information communication system according to an embodiment of the present invention has an advantage in that it can effectively prevent loss of usable capacity of the battery due to unavoidable data conversion during communication.

[0031] The effects of the present invention are not limited to those described above, and other effects not mentioned herein will be clearly understood by those skilled in the art from the claims.

[0032] The drawings attached to this specification illustrate preferred embodiments of the present invention and serve to further understand the technical concepts of the present invention as well as the content of the invention, and therefore the present invention should not be interpreted as being limited to only the matters depicted in the drawings. [Brief explanation of the drawings]

[0033] [Figure 1] 1 is a diagram illustrating a battery information communication system according to an embodiment of the present invention; [Figure 2]1 is a diagram illustrating an operation configuration of a battery information communication system according to an embodiment of the present invention; [Figure 3] FIG. 1 is a diagram illustrating a comparative example of a conventional battery information conversion process. [Figure 4] 10A and 10B illustrate an embodiment of a battery information conversion process according to an embodiment of the present invention. [Figure 5] 10A and 10B illustrate an embodiment of a battery information conversion process according to an embodiment of the present invention. [Figure 6] 10 is a diagram illustrating a method for converting battery information according to another embodiment of the present invention; [Figure 7] 10 is a diagram illustrating in more detail a step of generating conversion information in a method for converting battery information according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0034] The terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, but should be interpreted as having meanings and concepts corresponding to the technical ideas of the present invention, in accordance with the principle that the inventor can appropriately define the concepts of terms himself / herself in order to best explain the invention.

[0035] Therefore, it should be understood that the embodiments described in this specification and the configurations shown in the drawings are merely preferred embodiments of the present invention and do not represent the entire technical idea of the present invention, and that there may be various equivalent and modified embodiments that can be substituted for them at the time of this application.

[0036] Furthermore, when describing the present invention, if it is recognized that a specific description of known technology or functions related to the present invention may obscure the gist of the present invention, such detailed description will be omitted.

[0037] Any phrases including ordinal numbers such as "first," "second," etc. are used to distinguish one of various components from the remaining components, and are not used to limit the components by these phrases.

[0038] Throughout this specification, when a part is described as "comprising" a certain element, this does not mean that it may further include other elements, unless otherwise specified.

[0039] Furthermore, throughout this specification, when a part is said to be "connected" to another part, this includes not only a "direct connection" but also an "indirect connection" via another element in between.

[0040] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0041] FIG. 1 is a diagram schematically illustrating a battery information communication system 100 according to an embodiment of the present invention.

[0042] Referring to FIG. 1, a battery information communication system 100 according to an embodiment of the present invention may include a battery information transmitting device 110 and a battery information receiving device 120.

[0043] Here, a battery refers to a physically separable, independent cell that has a negative terminal and a positive terminal. For example, a lithium-ion battery or a lithium polymer battery may be considered a battery. A battery may also refer to a battery module and / or a battery pack that includes multiple cells.

[0044] The battery information communication system 100 will be described below with reference to FIG.

[0045] FIG. 2 is a diagram illustrating an operation configuration of a battery information communication system 100 according to an embodiment of the present invention.

[0046] The battery information transmitting device 110 may be configured to obtain first battery information regarding the battery.

[0047] Specifically, the battery information may include information that can be measured by the battery itself and information that can be estimated from the measured information. Preferably, the battery information may be information that can be used to determine the end point of charging / discharging the battery. For example, the battery information may be compared with a preset charging / discharging end condition to terminate charging / discharging the battery. In one embodiment, the battery information may include voltage, current, temperature, resistance, and state of charge (SOC). However, for ease of explanation, the following describes an embodiment in which the battery information transmitting device 110 transmits the battery SOC to the battery information receiving device 120.

[0048] For example, the battery information transmitting device 110 may acquire battery information by measuring the voltage, current, temperature, etc. of the battery. As another example, the battery information transmitting device 110 may receive battery information from another device that measures the voltage, current, temperature, etc. of the battery.

[0049] In step S1 of the embodiment of FIG. 2, the battery information transmitting device 110 may obtain first battery information.

[0050] The battery information transmitting device 110 may be configured to generate conversion information by applying a conversion rule that is preset to correspond to the charge / discharge state of the battery to the first battery information.

[0051] Specifically, the conversion rule may be preset to correspond to the charge / discharge state of the battery, i.e., the conversion rule when the battery is in a charge state may be different from the conversion rule when the battery is in a discharge state.

[0052] For example, if the battery is in a charging state, the battery information transmission device 110 may be configured to generate the conversion information by applying a preset first conversion rule. Conversely, if the battery is in a discharging state, the battery information transmission device 110 may be configured to generate the conversion information by applying a preset second conversion rule. Here, the first conversion rule and the second conversion rule may be different from each other. That is, since the battery information transmission device 110 generates the conversion information according to a conversion rule corresponding to the charging / discharging state of the battery, the second battery information finally acquired by the battery information reception device 120 may also differ depending on the charging / discharging state of the battery.

[0053] In step S2 of the embodiment of FIG. 2, the battery information transmitting device 110 may generate conversion information based on the first battery information and the charge / discharge state of the battery.

[0054] The battery information transmitting device 110 may be configured to transmit the conversion information, and the battery information receiving device 120 may be configured to receive the conversion information from the battery information transmitting device 110.

[0055] For example, the conversion information may be data having a size of 1 byte.

[0056] Specifically, the battery information transmitting device 110 may be communicatively connected to the battery information receiving device 120. For example, the battery information transmitting device 110 may be communicatively connected to the battery information receiving device 120 via wired communication and / or wireless communication. As a specific example, the battery information transmitting device 110 may be connected to the battery information receiving device 120 via controller area network (CAN) communication. It should be noted that there are no particular restrictions on the communication protocol between the battery information transmitting device 110 and the battery information receiving device 120.

[0057] In step S3 of the embodiment of FIG. 2, the battery information transmitting device 110 may transmit the conversion information to the battery information receiving device 120.

[0058] The battery information receiving device 120 may be configured to reconvert the conversion information to correspond to the conversion rule to obtain second battery information corresponding to the first battery information.

[0059] Specifically, the conversion information may be information generated from the first battery information according to a conversion rule, and the battery information receiving device 120 may reconvert the conversion information to obtain second battery information corresponding to the first battery information.

[0060] In step S4 of the embodiment of FIG. 2, the battery information receiving device 120 may obtain the second battery information from the conversion information.

[0061] The second battery information may be utilized as information indicating the state of the battery. For example, the battery information receiving device 120 may be configured to control charging and discharging of the battery based on the second battery information. Specifically, the battery information receiving device 120 may compare a battery charging termination condition with the second battery information to terminate charging of the battery, or may compare a battery discharging termination condition with the second battery information to terminate discharging of the battery.

[0062] Preferably, if the battery is in a charging state, the battery information receiving device 120 may be configured to obtain second battery information having a value equal to or less than the first battery information. Conversely, if the battery is in a discharging state, the battery information receiving device 120 may be configured to obtain second battery information having a value equal to or greater than the first battery information. Here, the information indicating the actual state of the battery is the first battery information, and the information obtained by the battery information receiving device 120 is the second battery information.

[0063] For example, assume that the first battery information and the second battery information are information related to SOC, and the second battery information is equal to or greater than the first battery information. The battery information receiving device 120 may terminate charging of the battery when the second battery information reaches the charging end SOC. In this case, charging of the battery may terminate even though the actual SOC of the battery (corresponding to the first battery information) has not reached the charging end SOC. That is, charging may actually terminate (the power limit may decrease to 0) before the battery is fully charged, thereby reducing the available capacity of the battery. Therefore, if the battery is in a charging state, the battery information receiving device 120 may be configured to obtain second battery information having a value equal to or less than the first battery information.

[0064] As another example, assume that the first battery information and the second battery information are information related to SOC, and the second battery information is equal to or less than the first battery information. The battery information receiving device 120 may terminate the discharge of the battery when the second battery information reaches the discharge end SOC. In this case, the battery discharge may be terminated even though the actual SOC of the battery (corresponding to the first battery information) has not reached the discharge end SOC. That is, the discharge may be terminated (the power limit may be reduced to 0) before the battery is actually fully discharged, thereby reducing the available capacity of the battery. Therefore, if the battery is in a discharged state, the battery information receiving device 120 may be configured to obtain second battery information having a value equal to or greater than the first battery information.

[0065] In this way, the battery information communication system 100 has the advantage of being able to obtain second battery information that serves as a basis for controlling charging and discharging based on the battery state (charging state or discharging state) so that the available capacity of the battery is not lost.

[0066] The conversion rules according to the battery state will be specifically described below.

[0067] The battery information transmission device 110 may be configured to generate the conversion information by truncating the decimal point in the weighted value of the battery information based on the first conversion rule. Specifically, if the battery state is a charged state, the battery information transmission device 110 may convert the first battery information into the conversion information according to the first conversion rule.

[0068] For example, the battery information transmitting device 110 may be configured to generate the conversion information according to a first conversion rule based on the following Equation 1:

[0069]

number

[0070] Here, C is the conversion information, K is the first battery information, and n is a predetermined conversion coefficient, i.e., the conversion information (C) may be a floor function value of the value obtained by multiplying the first battery information (K) by the conversion coefficient (n).

[0071] For example, the conversion coefficient may be a natural number. Preferably, the conversion coefficient may be a natural number equal to or greater than 2. More preferably, the conversion coefficient may be 2.

[0072] Referring to Equation 1, the decimal part of the value obtained by multiplying the first battery information (K) and the conversion coefficient (n) may be rounded down. Therefore, the conversion information (C) is always smaller than or equal to the value obtained by multiplying the first battery information (K) and the conversion coefficient (n). For example, if the first battery information (K) is 20.2 and the conversion coefficient (n) is 2, the conversion information (C) may be 40.

[0073] Then, the battery information transmission device 110 may be configured to generate conversion information by rounding up the decimal point in the weighted value of the battery information based on the second conversion rule. Specifically, if the battery state is a discharged state, the battery information transmission device 110 may convert the first battery information into conversion information according to the second conversion rule.

[0074] The battery information transmitting device 110 may be configured to generate the conversion information according to a second conversion rule based on the following Equation 2:

[0075]

number

[0076] Here, C is the conversion information, K is the first battery information, and n is a predetermined conversion coefficient, i.e., the conversion information (C) may be a ceiling function value of the value obtained by multiplying the first battery information (K) by the conversion coefficient (n).

[0077] For example, the conversion coefficient may be a natural number. Preferably, the conversion coefficient may be a natural number equal to or greater than 2. More preferably, the conversion coefficient may be 2.

[0078] Referring to Equation 2, the decimal part of the value obtained by multiplying the first battery information (K) and the conversion coefficient (n) may be rounded up. Therefore, the conversion information (C) is always greater than or equal to the value obtained by multiplying the first battery information (K) and the conversion coefficient (n). For example, if the first battery information (K) is 20.2 and the conversion coefficient (n) is 2, the conversion information (C) may be 41.

[0079] The battery information receiving device 120 may be configured to obtain, as the second battery information, a value obtained by dividing the conversion information by a conversion coefficient multiplied by the first battery information according to the conversion rule.

[0080] Specifically, the second battery information is a value obtained by re-converting the conversion coefficient, and the battery information receiving device 120 can obtain the second battery information by dividing the conversion information by the conversion coefficient multiplied by the first battery information according to the conversion rule.

[0081] For example, if the conversion factor is 2, the battery information receiving device 120 may divide the conversion information by 2 (the conversion factor) to obtain the second battery information.

[0082] Referring to Equation 1, the conversion information (C) is always smaller than or equal to the value obtained by multiplying the first battery information (K) by the conversion coefficient (n). Therefore, the second battery information obtained by dividing the conversion information (C) by the conversion coefficient (n) is always smaller than or equal to the first battery information (K). In other words, the battery information receiving device 120 terminates charging of the battery based on the second battery information, thereby preventing the battery from being insufficiently charged and losing its usable capacity.

[0083] Referring to Equation 2, the conversion information (C) is always greater than or equal to the value obtained by multiplying the first battery information (K) by the conversion coefficient (n). Therefore, the second battery information obtained by dividing the conversion information (C) by the conversion coefficient (n) is always greater than or equal to the first battery information (K). That is, the battery information receiving device 120 terminates the discharge of the battery based on the second battery information, thereby preventing the battery from being insufficiently discharged and losing its usable capacity.

[0084] Meanwhile, the battery information transmitting device 110 may be configured to set the conversion information to a preset discharge end value when the first battery information is less than a preset threshold based on the second conversion rule.

[0085] Specifically, according to the second conversion rule, the second battery information is always greater than or equal to the first battery information. Battery discharge can be terminated based on the comparison result between the battery information and the discharge termination condition, where the battery information considered here is the second battery information. That is, even if the actual state of the battery (corresponding to the first battery information) already satisfies the discharge termination condition, the battery may continue to discharge until the second battery information satisfies the discharge termination condition. In this case, the battery may be over-discharged, which may result in lithium plating, in which lithium metal is deposited on the surface of the battery's negative electrode. Therefore, the battery information transmitting device 110 can set the conversion information to a preset discharge termination value when the first battery information is less than a threshold value. The conversion information set to the discharge termination value can be configured to satisfy the discharge termination condition even after reconversion. Therefore, the battery information receiving device 120 that receives the conversion information set to the discharge termination value can immediately terminate the battery discharge after acquiring the second battery information.

[0086] For example, the threshold value may be set to 0.1%, and the discharge end value may be set to 0%. That is, if the first battery information is less than 0.1, the battery information transmitting device 110 may set the conversion information to 0. That is, even if the conversion information set to 0 is reconverted, the second battery information may be acquired as 0. Therefore, the battery information receiving device 120 can prevent the battery from being over-discharged by immediately ending the discharge of the battery.

[0087] 3 is a diagram illustrating a comparative example of a conventional battery information conversion process, and FIGS. 4 and 5 are diagrams illustrating an embodiment of a battery information conversion process according to an embodiment of the present invention.

[0088] Specifically, Fig. 3 shows a comparative example in which the second battery information is obtained by rounding the first battery information to the nearest whole number using a conventional method. Fig. 4 shows a first embodiment of the present invention, which illustrates the first battery information, conversion information, and second battery information when the battery is in a charging state. Fig. 5 shows a second embodiment of the present invention, which illustrates the first battery information, conversion information, and second battery information when the battery is in a discharging state.

[0089] For ease of explanation, it is assumed that the first battery information of the first battery B1 is 10, the first battery information of the second battery B2 is 10.4, the first battery information of the third battery B3 is 89.6, and the first battery information of the fourth battery B4 is 90. It is also assumed that the charging end SOC is 90 and the discharging end SOC is 10.

[0090] Referring to FIG. 3, if the second battery information is acquired by simply rounding the first battery information to the nearest whole number, even if the first battery information for the second battery B2 is 10.4, the second battery information may be acquired as 10. That is, even if the actual SOC of the battery has not yet reached the discharge end SOC (10%), the discharge of the second battery B2 may be terminated based on the second battery information. That is, in the comparative example of FIG. 3, the usable capacity of the second battery B2 may be lost by an amount equivalent to an SOC of 0.4% due to insufficient discharge. Also, even if the first battery information for the third battery B3 is 89.6, the second battery information may be acquired as 90. That is, even if the actual SOC of the battery has not yet reached the charge end SOC (90%), the charging of the third battery B3 may be terminated based on the second battery information. In other words, in the comparative example of Figure 3, the usable capacity of the third battery B3 may be lost by an amount equivalent to an SOC of 0.4% due to insufficient charging. In other words, the conventional method has a problem in that usable capacity may be lost in both the charging and discharging states.

[0091] Referring to Figure 4, when the battery state is charging, the second battery information of the third battery B3 may be acquired as 89.5. When referring to the second battery information of the fourth battery B4, the second battery information may be acquired as 90 only when the first battery information reaches 90. In other words, the battery may continue to be charged until the actual SOC of the battery reaches the end-of-charge SOC (90%). This makes it possible to prevent the loss of usable capacity of the battery due to insufficient charging.

[0092] 5, when the battery state is discharged, the second battery information of the second battery B2 may be acquired as 10.5. When the second battery information of the first battery B1 is acquired, the second battery information may also be acquired as 10 only after the first battery information reaches 10. In other words, the battery may continue to be discharged until the actual SOC of the battery reaches the discharge end SOC (10%). This makes it possible to prevent the loss of usable capacity of the battery due to insufficient discharge.

[0093] That is, the battery information communication system 100 according to an embodiment of the present invention has an advantage in that it can effectively prevent the loss of usable capacity of the battery due to inevitable data conversion during the communication process.

[0094] The battery information transmitting device 110 and the battery information receiving device 120 according to the present invention can be applied to a battery management system (BMS). That is, a BMS according to the present invention may include the above-described battery information transmitting device 110 and battery information receiving device 120. In this configuration, at least some of the components of the battery information transmitting device 110 and the battery information receiving device 120 can be realized by supplementing or adding functions of components included in a conventional BMS.

[0095] For example, the battery information transmitting device 110 may be a lower BMS, and the battery information receiving device 120 may be an upper BMS. The lower BMS may convert the battery information into conversion information and send the conversion information to the upper BMS. The upper BMS may then obtain information about the battery by reconverting the conversion information into second battery information. The upper BMS may then control charging and discharging of the battery based on the second battery information.

[0096] As a specific embodiment, it is assumed that the battery information communication system 100 according to an embodiment of the present invention is applied to an energy storage system (ESS). Generally, an ESS has a hierarchical structure including a module battery management system (MBMS) that monitors battery modules, a rack battery management system (RBMS) that monitors battery racks, a bank battery management system (BBMS) that monitors battery banks, and a battery system controller (BSC) that monitors the ESS. Here, battery information can be transmitted from the MBMS to the RBMS, from the RBMS to the BBMS, and from the BBMS to the BSC.

[0097] For example, if the battery information transmitting device 110 corresponds to an RBMS, the battery information receiving device 120 may correspond to a BBMS. The BBMS may receive conversion information from the RBMS and obtain second battery information from the received conversion information. Then, the BBMS may control charging and discharging of a battery module (a battery module included in a battery rack monitored by the RBMS) based on the second battery information.

[0098] FIG. 6 is a diagram illustrating a method for converting battery information according to another embodiment of the present invention.

[0099] Preferably, each step of the battery information conversion method may be performed by a battery information conversion system. In the following, for ease of explanation, the overlapping content with the content described above will be omitted or will be briefly described.

[0100] Referring to FIG. 6, the battery information conversion method may include a step of obtaining first battery information (S100), a step of generating conversion information (S200), and a step of obtaining second battery information (S300).

[0101] The step of acquiring first battery information (S100) is a step performed by the battery information transmission device 110, and the battery information transmission device 110 can acquire the first battery information related to the battery.

[0102] For example, the battery information transmitting device 110 may measure and / or estimate the first battery information by itself, or may receive the first battery information that has already been determined from an external source.

[0103] The conversion information generating step (S200) is a step performed by the battery information transmitting device 110, and the battery information transmitting device 110 may generate the conversion information by applying a conversion rule preset to correspond to the charge / discharge state of the battery to the first battery information.

[0104] FIG. 7 is a diagram illustrating in more detail the step of generating conversion information (S200) in the battery information conversion method according to another embodiment of the present invention.

[0105] In step S210, the battery information transmission device 110 may determine whether the battery is in a charging state. Note that although the determination here is whether the battery is in a charging state, in some embodiments the determination may be whether the battery is in a discharging state.

[0106] If the result of the determination in step S210 is "YES", step S220 may be performed, and if the result is "NO", step S230 may be performed.

[0107] In step S220, the battery information transmission device 110 may convert the first battery information into conversion information according to a first conversion rule, that is, when the battery state is a charging state, the conversion information may be generated according to the first conversion rule.

[0108] In step S230, the battery information transmission device 110 may convert the first battery information into conversion information according to the second conversion rule, that is, when the battery state is a discharged state, the conversion information may be generated according to the second conversion rule.

[0109] The step of acquiring second battery information (S300) is a step performed by the battery information receiving device 120, and the battery information receiving device 120 may reconvert the conversion information to correspond to the conversion rule to acquire second battery information corresponding to the first battery information.

[0110] For example, when the battery state is in a charging state, the battery information receiving device 120 may obtain second battery information having a value equal to or less than the first battery information.

[0111] Conversely, when the battery state is a discharged state, the battery information receiving device 120 may acquire second battery information having a value equal to or greater than the first battery information.

[0112] Therefore, the battery information receiving device 120 controls the charging and discharging of the battery based on the second battery information, and thus it is possible to prevent the loss of usable capacity of the battery due to insufficient charging and discharging.

[0113] Although the present invention has been described above using limited embodiments and drawings, it should be understood that the present invention is not limited thereto, and that various modifications and variations can be made by a person having ordinary skill in the art to which the present invention pertains within the scope of the technical concept of the present invention and the equivalent scope of the claims.

[0114] Furthermore, the present invention described above is susceptible to various substitutions, modifications, and alterations by those having ordinary knowledge in the technical field to which the present invention pertains, within the scope of the technical concept of the present invention. Therefore, the present invention is not limited to the above-described embodiments and the accompanying drawings, and may be configured by selectively combining all or part of each embodiment so that various modifications can be made. [Explanation of symbols]

[0115] 100 Battery Information and Communication System 110 Battery information transmitter 120 Battery information receiving device

Claims

1. a battery information transmitting device configured to acquire first battery information related to a battery, generate conversion information by applying a predetermined conversion rule to the first battery information so as to correspond to a charge / discharge state of the battery, and transmit the conversion information; a battery information receiving device configured to receive the conversion information from the battery information transmitting device, and re-convert the conversion information to correspond to the conversion rule to obtain second battery information corresponding to the first battery information; a battery information and communication system.

2. The battery information transmitting device includes: If the battery is in a charged state, applying a first preset conversion rule to generate the conversion information; The battery information communication system according to claim 1 , wherein the system is configured to generate the conversion information by applying a second preset conversion rule if the battery is in a discharged state.

3. The battery information transmitting device includes: The battery information communication system according to claim 2 , configured to generate the conversion information by truncating decimal points in the weighted values of the battery information based on the first conversion rule.

4. The battery information transmitting device includes: The battery information and communication system according to claim 3 , configured to generate the conversion information in accordance with the first conversion rule based on the following Equation 1: [Equation 1] where C is the conversion information, K is the first battery information, and n is a predetermined conversion coefficient.

5. The battery information transmitting device includes: The battery information communication system according to claim 2 , wherein the conversion information is generated by rounding up decimal points in the weighted values of the battery information based on the second conversion rule.

6. The battery information transmitting device includes: The battery information and communication system according to claim 5 , configured to generate the conversion information in accordance with the second conversion rule based on the following Equation 2: [Equation 2] where C is the conversion information, K is the first battery information, and n is a predetermined conversion coefficient.

7. The battery information transmitting device includes:

6. The battery information and communication system according to claim 5, further configured to set the conversion information to a predetermined discharge end value when the first battery information is less than a predetermined threshold based on the second conversion rule.

8. The battery information receiving device includes: If the battery is in a charging state, obtain the second battery information having a value equal to or less than the first battery information; 2. The battery information and communication system according to claim 1, wherein the system is configured to acquire the second battery information having a value equal to or greater than the first battery information if the battery is in a discharged state.

9. The battery information receiving device includes:

9. The battery information communication system according to claim 8, wherein the second battery information is obtained by dividing the conversion information by a conversion coefficient multiplied by the first battery information according to the conversion rule.

10. The battery information receiving device includes: The battery information and communication system according to claim 1 , configured to control charging and discharging of the battery based on the second battery information.

11. An energy storage system including the battery information and communication system according to any one of claims 1 to 10.

12. a first battery information acquiring step of acquiring first battery information related to a battery in the battery information transmitting device; a generating step of generating conversion information in the battery information transmission device by applying a predetermined conversion rule to the first battery information so as to correspond to a charge / discharge state of the battery; an acquiring step of second battery information in the battery information receiving device, reconverting the conversion information so as to correspond to the conversion rule and acquiring second battery information corresponding to the first battery information; A battery information communication method comprising:

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