Integrated management methods for used batteries from different types of electric vehicles and battery management system

Abstract

The present invention relates to a method for integrated management of used batteries and a battery management system for integrated management of data of used batteries of heterogeneous electric vehicles. The present invention includes the steps of identifying the type of data transmitted from a pin of a used battery, identifying an electric vehicle model corresponding to the type of data for each pin through a pre-stored database of electric vehicle models, configuring the data of the used battery according to the communication protocol of the electric vehicle model, and converting the configured data into an internal protocol.

Description

Technology Field

[0001] The present invention relates to a method for integrated management of used batteries and a battery management system for integrated management of data of used batteries of heterogeneous electric vehicles. Background Technology

[0003] A Battery Management System (BMS) is essential for recycling used batteries from electric vehicles.

[0004] However, domestic automakers do not disclose information regarding electric vehicle battery management systems for security reasons. Consequently, since the battery management system protocols are not publicly available, it is necessary to remove the system from a used battery, connect a new system to the cells and modules, and then directly acquire digital signals transmitted from communication cable ports or pins to interpret sensor data such as voltage, current, and temperature.

[0005] In addition, since compatible protocols differ depending on the manufacturer or electric vehicle model, there is a problem in that a communication-compatible battery management system must be developed for each manufacturer or electric vehicle model.

[0006] Therefore, there is a need for technology that can integrate and manage used batteries from different types of electric vehicles. Prior art literature

[0008] Korean Patent Publication No. 10-2539729 (Registration Date: May 30, 2023) The problem to be solved

[0009] The present invention has the purpose of enabling integrated management of used batteries from heterogeneous electric vehicles using a single battery management system.

[0010] The objects of the present invention are not limited to those mentioned above, and other unmentioned objects and advantages of the present invention may be understood from the following description and will be more clearly understood by the embodiments of the present invention. Furthermore, 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 of solving the problem

[0012] The present invention includes the steps of identifying the type of data transmitted from a pin of a used battery, identifying an electric vehicle model corresponding to the type of data for each pin through a pre-stored database of electric vehicle models, configuring the data of the used battery according to the communication protocol of the electric vehicle model, and converting the configured data into an internal protocol.

[0013] In one embodiment, the database may store pin maps and communication protocols for each electric vehicle model.

[0014] In one embodiment, the internal protocol may have message frames defined in advance.

[0015] In one embodiment, the conversion step to the internal protocol can map the configured data to the message frame.

[0016] In one embodiment, the method may include the steps of combining a flag ID for the identified electric vehicle model with the converted internal protocol to integrate it into a single stream, and generating an integrated signal based on the single stream and transmitting it to a battery management system (BMS).

[0017] The present invention may include a collection module that collects data of an internal protocol converted according to the above embodiment, and a decoding module that decodes the data of the internal protocol.

[0018] In one embodiment, the internal protocol may include a flag ID for an electric vehicle model.

[0019] In one embodiment, the decoding module has a communication protocol for each flag ID stored in advance, and can decode data of the internal protocol according to the flag ID of the internal protocol.

[0020] In one embodiment, an electric vehicle model for each flag ID is defined in advance, and a classification and storage module may be included that classifies and stores decrypted data according to the flag ID of the internal protocol. Effects of the invention

[0022] The present invention enables the integrated management of used battery data from heterogeneous electric vehicles using a single battery management system, thereby reducing the time and cost of developing battery management systems for each electric vehicle model and facilitating scalability, such as capacity expansion for products composed of used batteries.

[0023] In addition to the effects described above, the specific effects of the present invention are described together with the specific details for implementing the invention below. Brief explanation of the drawing

[0025] FIGS. 1 and 2 are a method for integrated management of used batteries of heterogeneous electric vehicles according to an embodiment of the present invention, Figure 3 is an example of fin map analysis of an electric vehicle module. FIGS. 4 and 5 are a battery management system (BMS) for integrated management of used batteries of heterogeneous electric vehicles according to an embodiment of the present invention. Specific details for implementing the invention

[0026] The aforementioned objectives, features, and advantages are described in detail below with reference to the attached drawings, thereby enabling those skilled in the art to easily implement the technical concept of the present invention. In describing the present invention, detailed descriptions of known technologies related to the present invention are omitted if it is determined that such descriptions would unnecessarily obscure the essence of the invention. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the attached drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

[0027] In this specification, terms such as "first," "second," etc. are used to describe various components, but these components are not limited by these terms. These terms are used merely to distinguish one component from another, and unless specifically stated otherwise, the first component may be the second component.

[0028] Additionally, in this specification, the statement that any configuration is disposed on the "upper (or lower)" or "upper (or lower)" of a component may mean not only that any configuration is disposed in contact with the upper (or lower) surface of said component, but also that another configuration may be interposed between said component and any configuration disposed on (or below) said component.

[0029] Furthermore, where it is stated in this specification that one component is "connected," "coupled," or "connected" to another component, it should be understood that while the components may be directly connected or connected to each other, another component may be "interposed" between each component, or each component may be "connected," "coupled," or "connected" through another component.

[0030] Additionally, singular expressions used in this specification include plural expressions unless the context clearly indicates otherwise. In this application, terms such as "composed of" or "comprising" should not be interpreted as necessarily including all of the various components or steps described in the specification, and should be interpreted as meaning that some of the components or steps may not be included, or that additional components or steps may be included.

[0031] Additionally, in this specification, "A and / or B" means A, B, or A and B unless specifically stated otherwise, and "C to D" means C or more and D or less, unless specifically stated otherwise.

[0032] Hereinafter, with reference to FIGS. 1 and FIGS. 2, a method for integrated management of used batteries of heterogeneous electric vehicles according to some embodiments of the present invention will be described.

[0033] Sensor information such as voltage, current, and temperature of an electric vehicle battery can be transmitted to a battery management system via communication such as RS-485. However, since battery cell information cannot be obtained from used batteries because the existing battery management system is removed, equipment can be used to estimate the data-transmitting pin and pin number among the pins connected to the used battery.

[0034] Here, a pin is used to transmit electrical signals such as voltage, current, and temperature data in a battery module, and the pin number can indicate the physical location of each pin and, depending on the design, can also be used as a standard for performing specific roles such as power supply or data transmission.

[0035] The reason for guessing the PIN number from which data is transmitted from a used battery is that the data transmission PIN differs for each electric vehicle model, which can help identify the electric vehicle model in which the used battery was installed.

[0036] For example, referring to Fig. 3, the connection between the input pin and the output pin is determined based on the connection relationship between the pins of each module, and the polarity of the signal is identified using the axes marked (+) and (-). The role of each pin can be analyzed by checking the direction of current flow according to the pin number. For example, in the case of the Type-A connector of Module #1, pin 7 of Module #1 (10 pins) is connected to pin 2 of Module #1 (20 pins), and since the direction of current flow is a (-) direction signal, it can be inferred that the connection between the pins serves as a power source. Additionally, pin 3 of Module #1 (10 pins) is connected to pin 6 of Module #1 (20 pins), and since the direction of current flow is a (+) direction signal, it can be inferred that the connection between the pins serves as a data signal transmission source.

[0037] The type of data transmitted from the pin connected to the battery after use is identified (S100). That is, by interpreting the structure of the digital signal (0,1) transmitted from the pin connected to the battery after use, the type of data can be identified as representing which of the sensor values, such as voltage, temperature, and current, is transmitted from each pin connected to the battery after use.

[0038] The physical meaning of the data can be identified by measuring the data transmitted from the pin connected to the battery after use using test equipment, recording it for a certain period of time, and analyzing patterns.

[0039] By identifying the types of data, it can help estimate the pin map of the used battery, which can help determine which electric vehicle model the used battery was installed in.

[0040] The electric vehicle model can be identified by using the type of data transmitted from each pin of the battery after use, and specifically, the electric vehicle model corresponding to the type of data for each pin can be identified through a database of electric vehicle models stored in advance (S200).

[0041] Here, the database must store pin maps and communication protocols for each electric vehicle model.

[0042] A pin map is a visual representation of the pin numbers, roles, and connection relationships of a battery module. Since the battery modules, sensors, and communication protocols used vary by electric vehicle model, the placement, roles, and connection relationships of the pins can be designed to be specialized according to the electric vehicle model.

[0043] Communication protocols are standardized communication methods used to transmit and receive data and commands, and communication protocols such as CAN and RS-485 can be used depending on the electric vehicle model.

[0044] Accordingly, by matching the data types for each pin of the used battery within the pin maps for each electric vehicle model stored in the database, it is possible to identify which electric vehicle model the used battery belonged to, and also extract the communication protocol of the identified electric vehicle model.

[0045] Data from the used battery is configured according to the communication protocol of the identified electric vehicle model, and the configured data is converted into an internal protocol (S300). That is, data configured according to the communication protocol of the identified electric vehicle model can be converted into an internal protocol by mapping it according to a mapping table. For example, if the data configured according to the communication protocol of the identified electric vehicle model indicates voltage as the data type of CAN message ID 0X101, it can be mapped to 'voltage data' through the internal protocol.

[0046] Meanwhile, the internal protocol requires message frames to be defined in advance; specifically, the structure and components of the message frames can be defined, and these can be defined by users, etc. By defining message frames, data configured according to the electric vehicle model's communication protocol can be mapped to the internal protocol, and the meaning and format of the data can be consistently defined to process the data within the internal protocol.

[0047] Here, mapping refers to the process of associating one value with another, involving the pairing and storage of data that acts as a key with data that acts as a value. A mapping table consists of rules necessary to map data between different protocols and can be stored in advance.

[0048] After converting to an internal protocol, the flag IDs for the identified electric vehicle models are combined and integrated into a single stream (S400).

[0049] In this case, the flag ID must be pre-stored for each electric vehicle model, and it is desirable to bind it to the header of the data converted by the internal protocol. Binding the flag ID can help identify which electric vehicle model the data belongs to.

[0050] A single stream involves converting used battery data into an internal protocol as described above, collecting it in parallel, and then sequentially integrating it into a stream. By integrating into a single stream, the efficiency of analysis, storage, and processing is maximized, thereby providing a consistent data flow that enables the integrated handling of data regarding used batteries from heterogeneous electric vehicles.

[0051] Accordingly, an integrated signal is generated based on a single stream integrated as described above and transmitted to a battery management system (BMS) (S500).

[0052] The integrated signal generates a signal based on multiple communication protocols, and at this time, wired communication methods such as CAN, UART, and Modbus, and wireless communication methods such as Zigbee, Wi-Fi, and Bluetooth can be used.

[0053] As described above, data transmitted from used batteries of heterogeneous electric vehicles can be converted according to an internal protocol to generate an integrated signal and sent to the battery management system. This eliminates the need to manufacture a battery management system for each electric vehicle model, thereby not only reducing costs but also enabling efficient data management.

[0054] Meanwhile, below, with reference to FIGS. 4 and FIG. 5, a battery management system (BMS) for integrated management of used batteries of heterogeneous electric vehicles according to some embodiments of the present invention will be described.

[0055] The battery management system (BMS) may include a collection module (100), a decoding module (200), and a classification and storage module (300).

[0056] The collection module (100) receives an integrated signal and collects data of the converted internal protocol.

[0057] The decoding module (200) decodes the data of the internal protocol and can decode the data of the internal protocol according to the flag ID of the internal protocol. At this time, an electric vehicle model for each flag ID may be defined in advance and a communication protocol for it may be stored, which allows not only to know which electric vehicle model the converted internal protocol data belongs to, but also to decode it according to the communication protocol of the corresponding electric vehicle model.

[0058] In other words, to decode data from an internal protocol, a flag ID is extracted from the internal protocol, and the data is decoded according to the communication protocol corresponding to the extracted flag ID to output the decoded data.

[0059] The classification and storage module (300) can classify and store decrypted data by electric vehicle model using the flag ID of the internal protocol.

[0060] The Battery Management System (BMS) can comprehensively manage data on used batteries of heterogeneous electric vehicles and easily expand capacity when expansion is needed.

[0061] Although the present invention has been described above with reference to the illustrated drawings, the present invention is not limited by the embodiments and drawings disclosed in this specification, and it is obvious that various modifications can be made by a person skilled in the art within the scope of the technical concept of the present invention. Furthermore, even if the effects of the configuration of the present invention were not explicitly described while explaining the embodiments of the present invention above, it is natural to acknowledge that the effects predictable by said configuration should also be recognized.

Claims

Claim 1 A method for integrated management of a used battery, comprising: a step of identifying the type of data transmitted from a pin of the used battery; a step of identifying an electric vehicle model corresponding to the type of data for each pin through a pre-stored database of electric vehicle models; and a step of configuring the data of the used battery according to the communication protocol of the electric vehicle model and converting the configured data into an internal protocol. Claim 2 A method for integrated management of used batteries according to claim 1, wherein the database stores a pin map and a communication protocol for each electric vehicle model. Claim 3 Claim 1, wherein the internal protocol is a post-use battery integrated management method in which a message frame is defined in advance. Claim 4 A used battery integrated management method according to claim 3, wherein the conversion step to the internal protocol maps the configured data to the message frame. Claim 5 A method for integrated management of a used battery according to claim 1, comprising: a step of combining a flag ID for the identified electric vehicle model with the converted internal protocol to integrate it into a single stream; and a step of generating an integrated signal based on the single stream and transmitting it to a battery management system (BMS). Claim 6 A battery management system comprising: a collection module for collecting data of an internal protocol converted according to any one of claims 1 to 5; and a decoding module for decoding data of the internal protocol. Claim 7 In claim 6, the internal protocol comprises a flag ID for an electric vehicle model, in a battery management system. Claim 8 A battery management system according to claim 7, wherein the decoding module stores a communication protocol for each flag ID in advance and decodes data of the internal protocol according to the flag ID of the internal protocol. Claim 9 A battery management system according to claim 7, wherein an electric vehicle model for each flag ID is defined in advance, and a classification and storage module that classifies and stores decoded data according to the flag ID of the internal protocol.

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