Performance test system for battery management system

Abstract

This BMS performance test system comprises: a battery pack simulator (BPS) implemented to simulate a plurality of battery cells of a target battery device to be simulated and provide battery measurement information; a test device for generating a BPS test signal on the basis of test information including the battery measurement information; and a CAN analysis device for converting the BPS test signal into a first CAN signal to transmit the first CAN signal to the BPS, and receiving a second CAN signal including the battery measurement information from the BPS. The BPS may include: a measurement apparatus for providing the battery measurement information; and a communication conversion device for receiving the first CAN signal from the CAN analysis device, converting the first CAN signal according to a communication method of the measurement apparatus to generate first simulation control signal and provide the first simulation control signal to the measurement apparatus, and receiving the battery measurement information from the measurement apparatus to transmit the battery measurement information to the CAN analysis device.

Description

Performance test system for battery management systems

[0001] Cross-citation with related application(s)

[0002] This application claims the benefit of priority to Korean Patent Application No. 10-2024-0037835, filed March 19, 2024, the entire contents of which are incorporated herein by reference.

[0003] The present disclosure relates to a performance test system for a battery management system.

[0004] A Battery Pack Simulator (BPS) device is used to evaluate the performance of a Battery Management System (BMS). The BPS device generates simulated data regarding the voltage, current, temperature, etc. of the battery pack and / or battery cells and provides this data to the BMS and test equipment. The test equipment then receives a response to the simulated data from the BMS and can use this data to verify the performance of the BMS.

[0005] Because each instrument in a BPS system uses a different communication method, the test device can control and monitor the instrument's status through the instrument's user interface (UI) program provided by the instrument manufacturer. However, the performance and maintenance capabilities of the UI program vary across instrument manufacturers, making it difficult to maintain the test device reliably.

[0006] We aim to provide a BMS performance test system that can stably operate test equipment regardless of the manufacturers of the measuring instruments that make up the BPS.

[0007] A BMS performance test system according to one aspect of the invention may include a battery pack simulator (BPS) implemented to simulate a plurality of battery cells of a target battery device to be simulated and providing battery measurement information, a test device generating a BPS test signal based on test information including the battery measurement information, and a CAN analysis device converting the BPS test signal into a first CAN signal and transmitting it to the BPS, and receiving a second CAN signal including the battery measurement information from the BPS. The BPS may include a measuring device for providing the battery measurement information, and a communication conversion device receiving the first CAN signal from the CAN analysis device, converting the first CAN signal according to a communication method of the measuring device to generate a first simulation control signal and providing it to the measuring device, and receiving the battery measurement information from the measuring device and transmitting it to the CAN analysis device.

[0008] The BPS may further include a cell power simulator that generates and outputs a plurality of cell voltages of the plurality of battery cells. The communication conversion device may generate a second simulation control signal for the plurality of cell voltages based on the CAN message of the first CAN signal through a communication method of the cell power simulator and provide the second simulation control signal to the cell power simulator when the CAN message ID of the first CAN signal indicates simulation of a plurality of cell voltages for the plurality of battery cells.

[0009] The cell power simulator may provide, as status information, cell voltage information obtained by measuring a plurality of cell voltages output by the cell power simulator or cell voltage information indicating a plurality of cell voltages according to the second simulated control signal to the communication conversion device. The communication conversion device may generate a second CAN signal including the cell voltage information and transmit it to the CAN analysis device.

[0010] The measuring device may be an ADC (Analog Digital Converter) circuit that measures a plurality of cell currents flowing in a plurality of cell currents of the plurality of battery cells. The communication conversion device may generate, by a communication method of the ADC circuit, the first simulated control signal that instructs the measurement of a plurality of cell currents based on a CAN message of the first CAN signal when the first CAN signal instructs the measurement of a plurality of cell currents for the plurality of battery cells, and provide the first simulated control signal to the ADC circuit.

[0011] The ADC circuit can provide cell current information based on the plurality of cell currents to the communication conversion device. The communication conversion device can generate a second CAN signal including the cell current information and transmit it to the CAN analysis device.

[0012] The above measuring device may be a pack current measuring device that measures the pack current flowing in the battery pack of the target battery device. The communication conversion device may generate the first simulated control signal, which instructs pack current measurement based on a CAN message of the first CAN signal, through a communication method of the pack current measuring device, and provide the first simulated control signal to the pack current measuring device when the first CAN signal instructs pack current measurement.

[0013] The pack current meter can generate pack current according to the first simulated control signal and transmit battery pack current information according to the first simulated control signal as status information to the communication conversion device. The communication conversion device can generate a second CAN signal including the battery pack current information and transmit the signal to the CAN analysis device.

[0014] The measuring device may be a temperature measuring device that measures the cell temperatures of the plurality of battery cells of the target battery device. The communication conversion device may generate, in a communication manner of the temperature measuring device, the first simulated control signal that indicates the temperatures of the plurality of battery cells based on a CAN message of the first CAN signal, and provide the first simulated control signal to the temperature measuring device, when the first CAN signal indicates temperature measurement of the plurality of battery cells.

[0015] The temperature measuring device can generate temperature detection information indicating a plurality of cell temperatures according to the first simulated control signal and transmit the temperature detection information according to the first simulated control signal as status information to the communication conversion device. The communication conversion device can generate a second CAN signal including the temperature detection information and transmit the second CAN signal to the CAN analysis device.

[0016] The measuring device may be a load measuring device that generates load current information of the target battery device. The communication conversion device may generate, through a communication method of the load measuring device, the first simulation control signal that indicates a load current value based on a CAN message of the first CAN signal, when the first CAN signal instructs simulation of a load current flowing in a load connected to the target battery device, and provide the first simulation control signal to the load measuring device.

[0017] The load measuring device can generate load current information according to the first simulated control signal and transmit the load current information as status information to the communication conversion device. The communication conversion device can generate a second CAN signal including the load current information and transmit the signal to the CAN analysis device.

[0018] The measuring device may be a relay measuring device that generates a signal indicating the opening or closing of each of a plurality of relays of the target battery device. The communication conversion device may generate, through a communication method of the relay measuring device, the first simulated control signal including information on the opening or closing of each of the plurality of relays based on a CAN message of the first CAN signal, when the first CAN signal indicates the opening or closing simulation of the plurality of relays, and provide the first simulated control signal to the relay measuring device.

[0019] The relay measuring device can generate relay opening / closing information according to the first simulated control signal and transmit the relay opening / closing information as status information to the communication conversion device. The communication conversion device can generate a second CAN signal including the relay opening / closing information and transmit it to the CAN analysis device.

[0020] The BMS performance test system may further include a power supply device that generates output power. The communication conversion device may generate, through a communication method of the power supply device, the first simulation control signal that indicates an output power value based on a CAN message of the first CAN signal when the first CAN signal indicates output power simulation, and provide the first simulation control signal to the power supply device.

[0021] The test device generates a BMS control signal that instructs a control command for a battery management system for the target battery device and transmits the BMS control signal to the CAN analysis device, and the CAN analysis device converts the BMS control signal into a CAN signal to generate a third CAN signal and transmits the third CAN signal to the battery management system, and can receive a fourth CAN signal from the battery management system that instructs control performed by the battery management system in response to the battery measurement information.

[0022] The test device can determine the control that the battery management system needs to perform based on the battery measurement information, and determine whether the battery management system is normal based on the result of comparing the execution control indicated by the fourth CAN signal.

[0023] The first CAN signal includes a CAN message ID and a CAN message, and a control command and a control target for the BPS are specified according to the CAN message ID, and the CAN message may include simulation information necessary for a simulation operation to be performed by the control target of the BPS according to the control command.

[0024] The second CAN signal includes a CAN message ID and a CAN message, and the type of the battery measurement information is determined according to the CAN message ID, and the CAN message may include values ​​provided by the measuring device.

[0025] The CAN analysis device can convert the BPS test signal into the first CAN signal according to a CAN message ID and a protocol for the CAN message for the BPS control. The communication conversion device can convert the battery measurement information into the second CAN signal according to the protocol.

[0026] The above protocol may include a first area for a CAN message ID for transmitting the first CAN signal from the CAN analysis device to the BPS and a second area for a CAN message ID for transmitting the second CAN signal from the BPS to the CAN analysis device.

[0027] The present disclosure provides a BMS performance test system capable of performing a test using CAN communication regardless of the communication method of measuring instruments constituting a BPS in a BMS performance test.

[0028] FIG. 1 is a block diagram illustrating a BMS performance test system according to some embodiments.

[0029] FIG. 2 is a diagram showing the configuration of a BPS device according to some embodiments.

[0030] FIG. 3 is a block diagram showing the configuration of a cell power simulator according to some embodiments.

[0031] Fig. 4 is a circuit diagram schematically showing the battery pack simulation device illustrated in Fig. 3.

[0032] FIG. 5 is a block diagram illustrating a pack current meter according to some embodiments.

[0033] FIG. 6 is a block diagram illustrating a temperature measuring device according to some embodiments.

[0034] The drawings attached to this specification are only intended to facilitate understanding of the embodiments disclosed in this specification, and the technical ideas disclosed in this specification are not limited by the attached drawings, and should be understood to include all modifications, equivalents, or substitutes included in the spirit and technical scope of the present invention.

[0035] Terms that include ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by these terms. These terms are used solely to distinguish one component from another.

[0036] In this application, terms such as “include” or “have” are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in the specification, but should be understood not to exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0037] A performance test system for verifying the function of a BMS of an EV (Electric Vehicle) and LEV (Light Electric Vehicle) can utilize CAN communication. The BMS performance test system includes a test device, and the test device can transmit control commands, control targets, and simulation information for controlling the simulated operation of the BPS to the BPS via CAN communication, and can receive measurement information and status information provided from the BPS via CAN communication. The test device can transmit control commands to the BMS via CAN communication and receive responses to the control commands from the BMS via CAN communication. The BPS can include a communication conversion device for utilizing CAN communication. The test device can analyze the performance of the BMS without a separate UI program using information received from the BPS and information received from the BMS via CAN communication. At this time, the physical channel for CAN communication between the test device and the BPS and the physical channel for CAN communication between the test device and the BMS can be separated from each other. In addition, the CAN communication protocol between the test device and the BPS can be standardized to transmit and receive information. Then, regardless of the manufacturers of the measuring instruments that make up the BPS or the BPS manufacturer, the test device can reliably analyze the performance of the BMS using the BPS. In the present disclosure, the BMS performance test system may include a CAN analysis device that provides CAN communication between the test device and the BPS and CAN communication between the test device and the BMS.

[0038] FIG. 1 is a block diagram illustrating a BMS performance test system according to some embodiments.

[0039] The system (1) includes a test device (10), a CAN analysis device (20), and a BPS (30). The system (1) can test the performance of a BMS (40). The BMS (40) may be a BMS that constitutes a battery system applied to EVs and LEVs.

[0040] The test device (10) can execute a built-in test program and provide test information through the test program. The test information can include battery measurement information to be simulated and measured by the BPS (30) and specifications regarding the battery measurement information. The battery measurement information is status information regarding a battery device (hereinafter, “target battery device”) that the BPS (30) intends to simulate, and can include information regarding cell voltages of a plurality of cells constituting the target battery device, temperatures of the battery and / or cells, current flowing through the battery, etc. The specifications regarding the battery measurement information can include information regarding whether the pack current measurement result is expressed in current units or voltage units (voltage generated when the pack current flows through a shunt resistor), information regarding whether the temperature of the battery cell is expressed in temperature units or voltage units (voltage across the two terminals of thermistor), etc.

[0041] The test device (10) can input test information through a user interface or receive test information through wired or wireless communication. For example, the test device (10) can obtain test information from log data of a BMS installed in a vehicle through wired or wireless communication.

[0042] The test device (10) can generate a BPS test signal (STS) including a control command, a control target, and simulation information for controlling a simulation operation of the BPS (30) based on test information. The test device (10) can determine a control command according to a control target and an operation to be simulated by the control target among the cell power devices and a plurality of measuring instruments constituting the BPS (30), and can obtain simulation information necessary for the simulation operation to be performed by the control target according to the control command. For example, the test device (10) can receive simulation information from an external source or extract simulation information from log data of the BMS.

[0043] The test device (10) can transmit a BPS test signal (STS) to the CAN analysis device (20). The test device (10) can generate a BMS control signal (MCS) that instructs a control command for the BMS (40) and transmit the signal to the CAN analysis device (20). The control command for the BMS (40) may be a command requesting information (hereinafter, BMS status information) about an operation performed by the BMS (40) in response to battery measurement information obtained from the BPS (30). The battery measurement information may include status information about the battery pack and battery cells, such as battery pack current, battery cell voltage, battery cell current, and battery cell temperature, generated by the BPS (30) performing a simulation operation for the battery pack and battery cells according to the BPS test signal (STS).

[0044] The CAN analysis device (20) can convert the BPS test signal (STS) and the BMS control signal (MCS) provided from the test device (10) into CAN signals to generate a first CAN signal (CAN1) and a third CAN signal (CAN3), and transmit them to the BPS (30) and the BMS (40) through two CAN buses (21, 22). For example, the CAN analysis device (20) can transmit the first CAN signal (CAN1) to the BPS (30) through the CAN bus (21), and transmit the third CAN signal (CAN3) to the BMS (40) through the CAN bus (22). The CAN bus (22) between the CAN analysis device (20) and the BMS (40) and the CAN bus (21) between the CAN analysis device (20) and the BPS (30) are separated. In this way, the physical channels, CAN bus (21) and CAN bus (22), are separated from each other, so that a standardized CAN message ID and a protocol for CAN messages for controlling BPS (30) can be provided. This allows CAN message IDs and CAN messages according to a standardized protocol to be used regardless of the manufacturer of BPS (30).

[0045] The CAN analysis device (20) can convert the BPS test signal (STS) into a CAN message ID and a CAN message. The CAN analysis device (20) can determine the corresponding CAN message ID in a defined protocol based on the control target and control command indicated by the BPS test signal (STS), and generate the simulation information as a CAN message. The CAN analysis device (20) can combine the CAN message ID and the CAN message to generate a first CAN signal (CAN1), and transmit it to the BPS (30) through the CAN bus (21).

[0046] The test device (10) can receive battery measurement information (BSI) and BMS status information (MSI) from the CAN analysis device (20). The test device (10) can analyze the BMS status information (MSI) to test the performance of the BMS. The communication method between the test device (10) and the CAN analysis device (20) can be one of various wired or wireless communication methods. For example, if the test device (10) is implemented as a computing device, the test device (10) and the CAN analysis device (20) can transmit and receive information in a computer communication manner.

[0047] The BMS (40) can perform control on the target battery device in response to the battery measurement information provided by the BPS (30). The BMS (40) can receive a third CAN signal (CAN3), and in response to the third CAN signal (CAN3), generate a fourth CAN signal (CAN4) indicating information on the control performed by the BMS (40), that is, BMS status information (MSI), and transmit the fourth CAN signal (CAN4) to the CAN analysis device (20). The CAN analysis device (20) can convert the fourth CAN signal (CAN4) to generate BMS status information (MSI). For example, when the BMS (40) performs cell balancing according to the battery measurement information, the BMS (40) can generate a fourth CAN signal (CAN4) indicating BMS status information (MSI) indicating that cell balancing has been performed, and transmit the fourth CAN signal (CAN4) to the CAN analysis device (20). The CAN analysis device (20) can convert the fourth CAN signal (CAN4) to generate BMS status information (MSI) indicating cell balancing performance and transmit the converted BMS status information to the test device (10). The test device (10) can determine the necessary control to be performed by the BMS (40) based on the battery measurement information (BSI), and can determine that the corresponding function of the BMS (40) is normal based on the result of comparing the performance control indicated by the BMS status information (MSI). For example, if the test device (10) determines that the necessary control to be performed by the BMS (40) is cell balancing based on the battery measurement information (BSI), and the performance control indicated by the BMS status information (MSI) is cell balancing, the BMS (40) can be determined to be normal. Conversely, if the necessary control and the performance control are different, the test device can determine that the corresponding function of the BMS (40), for example, the cell balancing function, is abnormal.

[0048] The BPS (30) can convert a control command and simulation information in a communication manner corresponding to a control target indicated by a first CAN signal (CAN1), generate a simulation control signal for controlling the control target, and provide the same to the control target. The BPS (30) can perform a simulation operation according to the simulation control signal, generate a second CAN signal (CAN2) indicating measured values ​​for battery measurement information (e.g., multiple cell voltages, cell balancing currents) provided by the performed simulation operation, and status information of the BPS (30), and provide the second CAN signal (CAN2) to the CAN analysis device (20). The status information of the BPS (30) includes information for confirming whether each of the components of the BPS (30) has normally received a CAN message according to the CAN message ID from the communication conversion device (390). Any of the components of the BPS (30) can transmit the received simulation information to the communication conversion device (390) as status information of the corresponding component.

[0049] FIG. 2 is a diagram showing the configuration of a BPS device according to some embodiments.

[0050] The BPS (30) may include a cell power simulator (310), an ADC (Analog Digital Converter) circuit (320), a pack current meter (330), a temperature meter (340), a load meter (350), a relay meter (370), a power supply device (360), and a communication conversion device (390). The cell power simulator (310), the first ADC circuit (320), the pack current meter (330), the temperature meter (340), the load meter (350), the relay meter (370), and the power supply device (360) illustrated in FIG. 2 are examples of the configurations of the BPS (30), and the invention is not limited thereto.

[0051] The communication conversion device (390) determines a corresponding configuration among the configurations (310, 320, 330, 340, 350, 360, 370) of the BPS (30) according to the CAN message ID in the first CAN signal (CAN1), converts the CAN message according to a communication method that the corresponding configuration can receive, generates a simulated control signal, and transmits the simulated control signal to the corresponding configuration. The simulated control signal may include simulated information necessary for a simulated operation to be performed by the corresponding configuration. The communication conversion device (390) may convert battery measurement information received from the configurations (310, 320, 330, 340, 350, 360, 370, 380) of the BPS (30) and status information of the BPS (30) into a second CAN signal (CAN2) and transmit the same to the CAN analysis device (20). The communication conversion device (390) can perform CAN communication with the CAN analysis device (20) via the CAN bus (21).

[0052] The communication conversion device (390) can generate a simulation control signal including information on a plurality of cell voltages of a plurality of battery cells based on the CAN message to the cell power simulator (310) when the CAN message ID instructs simulation of a plurality of cell voltages for a plurality of battery cells. At this time, the communication conversion device (390) can generate the simulation control signal (SC1) according to the communication method of the cell power simulator (310). For example, when the cell power simulator (310) is an RS485 serial communication method, the communication conversion device (390) can generate the simulation control signal (SC1) including bit data indicating a plurality of cell voltages to be suitable for RS485 serial communication. The technology by which the communication conversion device (390) converts a CAN communication signal into a signal of one of various communication methods and the technology by which a signal of one of various communication methods is converted into a CAN communication signal can be implemented using known technologies.

[0053] The cell power simulator (310) can be implemented to simulate the battery pack voltage according to the charging and discharging of each of the plurality of battery packs according to the simulation control signal (SC1), and the cell voltage and cell current for each of the plurality of battery cells of each of the plurality of battery packs. The cell power simulator (310) can divide the plurality of battery packs constituting the battery device to be simulated (hereinafter, the target battery device) into pack units, and individually control the cell voltage and cell current of each of the plurality of battery cells of each battery pack.

[0054] FIG. 3 is a block diagram showing the configuration of a cell power simulator according to some embodiments.

[0055] The cell power simulator (310) illustrated in FIG. 3 illustrates an example of simulating multiple cells. Although FIG. 3 illustrates four battery pack simulation devices, this is merely an example and does not limit the invention.

[0056] As illustrated in FIG. 3, the cell power simulator (310) may include a power source (311), a plurality of battery pack simulators (312 to 315), a control circuit (316), and a serial communication circuit (317).

[0057] The power source (311) can receive power from a power system or an external power source, convert the power into a voltage range suitable for the cell power simulator (310), and supply the power to a plurality of battery pack simulators (312 to 315). The power source (311) and the plurality of battery pack simulators (312 to 315) are insulated and coupled. The power source (311) includes a plurality of primary windings (W1, W2, W3, W4), and each of the plurality of battery pack simulators (312 to 315) can include a plurality of secondary windings (W5, W6, W7, W8). In a charging operation, the power supplied by the power source (311) can be transferred from each of the plurality of primary windings (W1, W2, W3, W4) that are insulated and coupled to each of the plurality of secondary windings (W5, W6, W7, W8). In the discharge operation, the power discharged by each of the plurality of battery pack simulation devices (312 to 315) can be transferred from each of the plurality of secondary windings (W5, W6, W7, W8) to the plurality of primary windings (W1, W2, W3, W4).

[0058] The serial communication circuit (317) can receive a simulated control signal (SC1) from the communication conversion device (390) and transmit it to the control circuit (316). The control circuit (316) can generate a plurality of power control signals (PC1 to PC4) for controlling the operation of the plurality of battery pack simulated devices (312 to 315) according to the simulated control signal (SC1) and provide the plurality of power control signals (PC1 to PC4) to the plurality of battery pack simulated devices (312 to 315). The simulated control signal (SC1) includes a plurality of battery cell voltage values ​​of each of the plurality of battery pack simulated devices (312 to 315), and the control circuit (316) can generate a plurality of power control signals (PC1 to PC4) based on the simulated control signal (SC1) so that each of the plurality of battery pack simulated devices (312 to 315) generates a plurality of cell voltages.

[0059] The control circuit (316) can transmit cell voltage information (CVI) that measures a plurality of cell voltages output by the cell power simulator (310) as status information of the cell power simulator (310) or cell voltage information (CVI) that indicates a plurality of cell voltages according to the received simulated control signal (SC1) to the serial communication circuit (317). The serial communication circuit (317) can transmit the cell voltage information (CVI) to the communication conversion device (390) in an RS485 serial communication manner. The communication conversion device (390) can convert the received cell voltage information (CVI) to generate a second CAN signal (CAN2) and transmit the second CAN signal (CAN2) to the CAN analysis device (20).

[0060] Fig. 4 is a circuit diagram schematically showing the battery pack simulation device illustrated in Fig. 3.

[0061] FIG. 4 shows a schematic circuit diagram of a battery pack simulator (312), one of the plurality of battery pack simulators illustrated in FIG. 3. Each of the remaining battery pack simulators (313, 314, 315) can be implemented in the same manner as the circuit illustrated in FIG. 4.

[0062] The secondary winding (W5) may include a plurality of windings (W5_1, W5_2, …, W5_n) according to the number of battery cells (n, n is a natural number greater than or equal to 2) constituting the battery pack simulation device (312).

[0063] The battery pack simulation device (312) may include a plurality of bidirectional converters (312_1, 312_2, …, 312_n) and a plurality of capacitors (C_1, C_2, …, C_n). Two input terminals of each of the plurality of bidirectional converters (312_1, 312_2, …, 312_n) are connected to each of the plurality of windings (W5_1, W5_2, …, W5_n), and between two output terminals of each of the plurality of bidirectional converters (312_1, 312_2, …, 312_n), a plurality of capacitors (C_1, C_2, …, C_n) are connected together with a plurality of shunt resistors (SR_1, SR_2, …, SR_n). A voltage between two output terminals of each of the plurality of bidirectional converters (312_1, 312_2, …, 312_n) may represent each of the plurality of cell voltages. A plurality of two output terminals (e.g., OC1, OC2) of a plurality of bidirectional converters (312_1, 312_2, …, 312_n) are connected to the BMS (40) and can provide a plurality of cell voltages to the BMS (40).

[0064] In Fig. 4, in order to simulate a plurality of battery cells constituting a battery pack being connected in series, a lower potential output terminal (e.g., OC2) of each of the two output terminals of a plurality of bidirectional converters (312_1, 312_2, …, 312_n) may be connected to a higher potential output terminal (e.g., OC3) of the two output terminals of an adjacent bidirectional converter. The voltage difference between the highest potential output terminal (OC1) and the lowest potential output terminal (OC4) of the plurality of bidirectional converters (312_1, 312_2, …, 312_n) may represent the battery pack voltage. The connection relationship between the plurality of bidirectional converters (312_1, 312_2, …, 312_n) may be determined according to the connection relationship of the plurality of battery cells constituting the target battery pack.

[0065] Each of the plurality of bidirectional converters (312_1, 312_2, …, 312_n) can generate a plurality of cell voltages by converting energy transferred through the plurality of windings (W5_1, W5_2, …, W5_n) during charging simulation. Each of the plurality of capacitors (C_1, C_2, …, C_n) can filter the output of each of the plurality of bidirectional converters (312_1, 312_2, …, 312_n) to provide a plurality of cell voltages. Each of the plurality of bidirectional converters (312_1, 312_2, …, 312_n) can convert energy charged in each of the plurality of capacitors (C_1, C_2, …, C_n) during discharging simulation and transfer power to each of the plurality of windings (W5_1, W5_2, …, W5_n). The power operation of each of the plurality of bidirectional converters (312_1, 312_2, …, 312_n) can be controlled according to the power control signal (PC1). For example, the power control signal (PC1) can be implemented as a set of signals that control the power operation of each of the plurality of bidirectional converters (312_1, 312_2, …, 312_n).

[0066] A cell current flows through each of the plurality of shunt resistors (SR_1, SR_2, …, SR_n), and the voltage across each of the plurality of shunt resistors (SR_1, SR_2, …, SR_n) can be a level corresponding to each cell current. For example, the voltage difference (VC1) across the shunt resistor (SR_1) can represent the cell current flowing in the battery cell.

[0067] When the cell power simulator (310) wants to directly measure multiple cell voltages as state information, the cell power simulator (310) may include multiple voltage meters connected to the output terminals of each of the multiple bidirectional converters (312_1, 312_2, …, 312_n) to measure the multiple cell voltages. As illustrated in FIG. 4, a voltage meter (401) may be connected between two output terminals (OC1, OC2) of the bidirectional converter (312_1).

[0068] In this way, the cell power simulator (310) can simulate multiple cell voltages and multiple cell currents of multiple battery cells of each of multiple battery packs. The BMS (40) can receive multiple cell voltages and battery pack voltages provided from the cell power simulator (310) and perform a monitoring operation of measuring the multiple cell voltages.

[0069] The communication conversion device (390) can generate a simulated control signal (SC2) instructing the measurement of multiple cell currents for multiple battery cells according to the CAN message ID and CAN message of the first CAN signal (CAN1), and transmit the simulated control signal (SC2) to the first ADC circuit (320). If the first ADC circuit (320) uses a CAN communication method, the communication conversion device (390) can generate a simulated control signal (SC2) according to the CAN message. Alternatively, if the communication method of the first ADC circuit (320) uses an RS232 serial communication method, the communication conversion device (390) can convert the CAN message into a simulated control signal (SC2) according to the RS232 serial communication, and transmit the converted control signal to the first ADC circuit (320). The first ADC circuit (320) can measure multiple cell currents flowing in multiple battery cells according to the simulated control signal (SC2).

[0070] The first ADC circuit (320) can convert an analog signal measuring a cell current flowing in each of a plurality of battery cells simulated by the cell power simulator (310) according to a simulation control signal (SC2) into a digital signal and transmit cell current information (CCI) to the communication conversion device (390). The first ADC circuit (320) can convert voltages at both ends of a plurality of shunt resistors (SR_1, SR_2, ..., SR_n) (for example, VC1 in FIG. 4) into a plurality of digital signals to generate cell current information (CCI), and can transmit the cell current information (CCI) to the communication conversion device (390) in an RS232 serial communication manner. The communication conversion device (390) can convert the cell current information (CCI) into a plurality of CAN message IDs and a plurality of CAN messages, and transmit a second CAN signal (CAN2) including these to the CAN analysis device (20). The communication conversion device (390) can group digital signals included in cell current information (CCI) into predetermined units, assign a CAN message ID to each group, and combine a CAN message including digital signals of predetermined units constituting each group with each CAN message ID. When cell balancing is performed on any of a plurality of battery cells, the test device (10) can receive cell current information (CCI) as battery measurement information (BSI) and confirm the cell balancing operation.

[0071] The communication conversion device (390) can generate a simulated control signal (SC3) for instructing the pack current meter (330) to measure the pack current based on the CAN message, when the CAN message ID instructs the measurement of the pack current flowing in the battery pack. At this time, the communication conversion device (390) can generate the simulated control signal (SC3) according to the communication method of the pack current meter (330). For example, when the pack current meter (330) is a LAN communication method, the communication conversion device (390) can generate a simulated control signal (SC3) for instructing the pack current according to the CAN message for the battery pack defined by the CAN message ID, according to the LAN communication method. The CAN message ID can also include an instruction for the unit for measuring the pack current. Generally, the unit for measuring the pack current can be a current unit or a voltage unit (a voltage generated when the pack current flows through a shunt resistor). Therefore, the CAN message IC can indicate either a current unit or a voltage unit.

[0072] The pack current meter (330) can generate a pack current according to a simulated control signal (SC3) and generate a pack current signal by measuring the pack current. The BMS (40) can receive a pack current signal in current units from an actual battery system or a pack current signal in the form of a voltage (in voltage units) across a shunt resistor through which the battery pack current flows. Accordingly, the pack current signal generated by the pack current meter (330) can indicate the battery pack current or the voltage across the shunt resistor generated when the battery pack current flows through the shunt resistor. The pack current meter (330) can provide the pack current signal to the BMS (40). The pack current meter (330) can transmit battery pack current information (PCI) according to the simulated control signal (SC3) as status information of the pack current meter (330) to the communication converter (390). The status information of the pack current meter (330) is information for checking whether the pack current meter (330) has normally received a CAN message according to the CAN message ID from the communication conversion device (390). The communication conversion device (390) can convert battery pack current information (PCI) to generate a second CAN signal (CAN2) and transmit the second CAN signal (CAN2) to the CAN analysis device (20).

[0073] Under the condition that the BMS (40) is implemented to receive a pack current signal in voltage units, if the CAN message ID indicates the pack current signal in current units, the pack current meter (330) can convert the pack current signal in current units into voltage units and provide it to the BMS (40).

[0074] FIG. 5 is a block diagram illustrating a pack current meter according to some embodiments.

[0075] FIG. 5 is a block diagram of a pack current meter that generates a pack current signal in voltage units. This is merely an example of a pack current meter and does not limit the invention. As illustrated in FIG. 5, the pack current meter (330) may include a pack current generation circuit (331), a shunt resistor (332), a control circuit (333), and a LAN communication circuit (334).

[0076] The LAN communication circuit (334) can receive a simulated control signal (SC3) from the communication conversion device (390) and transmit the simulated control signal (SC3) to the control circuit (333).

[0077] The control circuit (333) can control the pack current generation circuit (331) to generate a discharge current (id) or a charge current (ic) in a size according to the simulated control signal (SC3). The discharge current can flow in the opposite direction to the direction of the charge current. The current generated by the pack current generation circuit (331) can flow through the shunt resistor (332).

[0078] The voltage (Vsr) across the shunt resistor (332) generated by current flowing through it can be provided to the BMS (40) as a pack current signal.

[0079] The control circuit (333) collects battery pack current values ​​from the simulated control signal (SC3) as status information, generates battery pack current information (PCI), and transmits it to the LAN communication circuit (334). The LAN communication circuit (334) can transmit the battery pack current information (PCI) to the communication conversion device (390).

[0080] The communication conversion device (390) can generate a simulated control signal (SC4) that instructs the temperature measuring device (340) to measure the temperature of the plurality of battery cells based on the CAN message when the CAN message ID instructs temperature measurement for the plurality of battery cells. At this time, the communication conversion device (390) can generate the simulated control signal (SC4) according to the communication method of the temperature measuring device (340). For example, when the temperature measuring device (340) is an RS485 serial communication method, the communication conversion device (390) can generate the simulated control signal (SC4) by serially arranging bit data that instructs the temperature of the plurality of cells to be suitable for RS485 serial communication. The CAN message ID can also include an instruction on the unit for measuring the cell temperature. Generally, a thermistor is used to measure the temperature of a battery cell, and the BMS can receive the temperature corresponding to the resistance value of the thermistor or the voltage at both ends of the thermistor as temperature information. If the CAN message ID indicates temperature information in temperature units, the simulated control signal (SC4) can indicate multiple temperature values. Conversely, if the CAN message ID indicates temperature information in voltage units, the simulated control signal (SC4) can indicate multiple voltage values. The temperature measuring device (340) can convert multiple temperature values ​​or multiple voltage values ​​according to the simulated control signal (SC4) into analog signals and provide them to the BMS (40).

[0081] The temperature measuring device (340) can generate temperature detection information (TSI) by collecting a plurality of temperature values ​​or a plurality of voltage values ​​included in the simulated control signal (SC4) as status information of the temperature measuring device (340) and transmit the temperature detection information (TSI) to the communication conversion device (390). The status information of the temperature measuring device (340) is information for confirming whether the temperature measuring device (340) has normally received a CAN message according to the CAN message ID from the communication conversion device (390). The communication conversion device (390) can convert the received temperature detection information (TSI) to generate a second CAN signal (CAN2) and transmit the second CAN signal (CAN2) to the CAN analysis device (20).

[0082] FIG. 6 is a block diagram illustrating a temperature measuring device according to some embodiments.

[0083] The block diagram illustrated in Fig. 6 is an example to help understand the temperature measuring device and does not limit the invention. As illustrated in Fig. 6, the temperature measuring device (340) may include a DAC (Digital Analog Circuit) (341), a control circuit (342), and a serial communication circuit (343).

[0084] The control circuit (342) can generate temperature values ​​or voltage values ​​according to the simulated control signal (SC4) and provide them to the DAC (341).

[0085] The DAC (341) can convert temperature values ​​or voltage values ​​into analog signals and output them to the BMS (40). An analog signal having a voltage between two output terminals of the DAC (341) can be provided to the BMS (40).

[0086] The control circuit (342) collects temperature values ​​or voltage values ​​from the simulated control signal (SC4) as status information to generate temperature detection information (TSI) and transmits it to the serial communication circuit (343). The serial communication circuit (343) can transmit the temperature detection information (TSI) to the communication conversion device (390).

[0087] The communication conversion device (390) can generate a simulation control signal (SC5) based on the CAN message to the load meter (350) when the CAN message ID instructs simulation of the load current flowing in the load connected to the target battery device. When the load meter (350) is a LAN communication method, the communication conversion device (390) can generate the simulation control signal (SC5) by configuring bit data indicating the load current value for the target battery device included in the CAN message according to the LAN signal protocol.

[0088] The load measuring device (350) can generate load current values ​​for the target battery device according to the simulated control signal (SC5) and provide them to the BMS (40). The load measuring device (350) can transmit load current information (LCI) according to the load current value included in the simulated control signal (SC5) as status information of the load measuring device (350) to the communication conversion device (390). The communication conversion device (390) can convert the load current information (LCI) into a second CAN signal (CAN2) and transmit it to the CAN analysis device (20).

[0089] The communication conversion device (390) can generate a simulated control signal (SC6) including information on the opening or closing of each of the plurality of relays based on the CAN message, when the CAN message ID instructs the simulation of relay opening and closing for a plurality of relays of the target battery device. The plurality of relays can include relays that provide electrical connections between a plurality of battery packs and loads constituting the target battery device. The CAN message can include information on the opening (opening) or closing (closing) of each of the plurality of relays. When the relay measuring device (370) is a LAN communication method, the communication conversion device (390) can generate a simulated control signal (SC6) by configuring a plurality of relay control values ​​(bit data) that instruct the opening (opening) or closing (closing) of the plurality of relays included in the CAN message according to the LAN signal protocol.

[0090] The relay measuring device (370) can generate a signal indicating the opening or closing of each of a plurality of relays according to the simulated control signal (SC6) and provide the signal to the BMS (40). The relay measuring device (370) can generate relay opening / closing information (RCI) by collecting a plurality of relay control values ​​included in the simulated control signal (SC6) as status information of the relay measuring device (370) and transmit the generated relay opening / closing information to the communication conversion device (390). The communication conversion device (390) can convert the relay opening / closing information (RCI) into a second CAN signal (CAN2) and transmit the converted relay opening / closing information to the CAN analysis device (20).

[0091] The communication conversion device (390) can generate a simulated control signal (SC7) based on the CAN message when the CAN message ID indicates output power simulation. The output power may be the output power of the target battery pack or the charging power for charging the target battery pack. When the CAN message ID indicates output power simulation, the communication conversion device (390) can generate a simulated control signal (SC7) indicating the output power value included in the CAN message. At this time, the communication conversion device (390) can generate the simulated control signal (SC7) according to the communication method of the power supply device (360). For example, when the power supply device (360) is an RS232 serial communication method, the communication conversion device (390) can generate the simulated control signal (SC7) by serially arranging bit data indicating output power or charging power.

[0092] The power supply device (360) can generate output power according to the simulated control signal (SC7). The power supply device (360) can generate an output power measurement signal according to the output power value and transmit it to the BMS (40). The power supply device (360) can transmit power information (PSI) regarding the output power value according to the simulated control signal (SC7) as status information to the communication conversion device (390). The communication conversion device (390) can convert the power information (PSI) to generate a second CAN signal (CAN2) and transmit it to the CAN analysis device (20).

[0093] The second ADC circuit (380) can measure a plurality of gate voltages provided from the BMS (40). The plurality of gate voltages are voltages applied to the gates of a plurality of switching elements that provide a charge / discharge path of the target battery device. The second ADC circuit (380) can measure a plurality of gate voltages and transmit the measured plurality of gate voltage values ​​to the communication conversion device (390). The communication conversion device (390) can generate a second CAN signal (CAN2) including a plurality of gate voltage values ​​and transmit the second CAN signal (CAN2) to the CAN analysis device (20).

[0094] The CAN analysis device (20) can convert the second CAN signal (CAN2) received from the communication conversion device (390) into a communication method suitable for the test device (10) to generate battery measurement information (BSI).

[0095] Hereinafter, a defined protocol for CAN signals transmitted and received between a CAN analysis device (20) and a BPS (30) according to certain embodiments will be described. The protocol defined in the following description may include a standard area that can be universally used and an extended area that can be arbitrarily defined and used by a manufacturer producing a device constituting the BPS (30).

[0096] Table 1 shows the transmitter, receiver, and purpose for each CAN message ID range in each extended area. In Table 1, CAN message IDs are expressed in hexadecimal.

[0097] CAN Message ID Range Transmitter Receiver Usage 0x00~0x7FCAN Analysis Device BPS BPS Control, BPS Settings, BPS Debugging 0x80~0xFFBPSCAN Analysis Device BPS Status Information 0x700~0x77FCAN Analysis Device BPS BPS Control, BPS Settings, BPS Debugging 0x780~0x7FFBPSCAN Analysis Device BPS Status Information

[0098] The transmitter, receiver, and purpose of each CAN message ID in the extended area described in Table 1 can be arbitrarily set by the manufacturer, and Table 1 is an example and does not limit the invention. Table 2 shows the transmitter, receiver, and purpose of each CAN message ID range in the standard area. In Table 2, the CAN message ID is expressed in hexadecimal.

[0099] CAN Message ID Range Transmitter Receiver Usage 0x100~0x2FFCAN Analysis Device BPS Control target, control command, and simulation information for cell voltage control, pack current measurement, cell current measurement, cell temperature measurement, load current measurement, relay opening / closing measurement, output power measurement, and charging power measurement 0x300~0x4FFBPSCAN Analysis Device Cell current measurement result 0x500~0x6FFBPSCAN Analysis Device BPS status information

[0100] The status information of the BPS may include cell voltage information (CVI) that generates cell voltage, pack current information (PCI), temperature detection information (TSI), load current information (LCI), relay opening / closing information (RCI), and power information (PSI). First, the CAN message ID range “0x100 to 0x2FF” is the CAN message ID range that the first CAN signal (CAN1) that the CAN analysis device (20) described above transmits to the BPS (30) can have.

[0101] Among the CAN message ID ranges 0x100 to 0x2FF, multiple CAN message IDs (0x100 to 0x140) can specify multiple battery cells simulated by the BPS (30) in units of a predetermined number. For example, “0x100” may be a CAN message ID that specifies battery cells numbered 1 to 4 among the multiple battery cells, and “0x101” may be a CAN message ID that specifies battery cells numbered 5 to 8 among the multiple battery cells. Each of the multiple CAN message IDs (0x100 to 0x140) may be combined with a CAN message including multiple cell voltage values ​​for a corresponding predetermined number of battery cells.

[0102] Among the CAN message ID ranges 0x100 to 0x2FF, each of the plurality of CAN message IDs (0x200 to 0x20A) can specify each of the plurality of battery packs simulated by the BPS (30). Each of the plurality of CAN message IDs (0x200 to 0x20A) can be combined with a CAN message including the pack voltage value of the corresponding battery pack.

[0103] Among the CAN message ID range 0x100 to 0x2FF, each of the plurality of CAN message IDs (0x240 to 0x280) can specify each of the plurality of temperature values ​​or each of the plurality of voltage values ​​simulated by the BPS (30). Each of the plurality of CAN message IDs (0x240 to 0x280) can be associated with a CAN message including the corresponding temperature value or voltage value.

[0104] Among the CAN message ID range 0x100 to 0x2FF, each of the multiple CAN message IDs (0x2A1 to 0x2A2) specifies the corresponding relays among the multiple relays simulated by the BPS (30) and can be combined with a CAN message including the opening and closing values ​​of the corresponding relays.

[0105] Among the CAN message ID range 0x100 to 0x2FF, each of the plurality of CAN message IDs (0x2C1 to 0x2C2) specifies each of the plurality of output powers simulated by the BPS (30) and can be combined with a CAN message including the corresponding output power values ​​(e.g., voltage values ​​and current values).

[0106] Among the CAN message ID range 0x100 to 0x2FF, multiple CAN message IDs (0x2DA to 0x2DB) specify multiple loads simulated by the BPS (30) and can be combined with a CAN message including the load value of the corresponding load.

[0107] Among the CAN message ID ranges 0x100 to 0x2FF, multiple CAN message IDs (0x100 to 0x140) can specify multiple battery cells simulated by the BPS (30) in units of a predetermined number. For example, “0x100” may be a CAN message ID that specifies battery cells numbered 1 to 4 among the multiple battery cells, and “0x101” may be a CAN message ID that specifies battery cells numbered 5 to 8 among the multiple battery cells. Each of the multiple CAN message IDs (0x100 to 0x140) may be combined with a CAN message including multiple cell voltage values ​​for a corresponding predetermined number of battery cells.

[0108] The CAN message ID range “0x300~0x4FF” is the CAN message ID range that the second CAN signal (CAN2) that transmits the information measured by the BPS (30) described above to the CAN analysis device (20) can have.

[0109] Among the CAN message ID ranges 0x300 to 0x4FF, a plurality of CAN message IDs (0x301 to 0x308) may specify a plurality of gate voltage values ​​measured by the second ADC circuit (380) in units of a predetermined number. For example, “0x301” may be a CAN message ID that specifies the gate voltage values ​​of switching elements 1 to 4 among the plurality of switching elements, and “0x302” may be a CAN message ID that specifies the gate voltage values ​​of switching elements 5 to 8 among the plurality of switching elements. Each of the plurality of CAN message IDs (0x301 to 0x308) may be associated with a corresponding CAN message. The corresponding CAN message may include a predetermined number of gate voltage values ​​specified by each CAN message ID among the plurality of gate voltage values.

[0110] Among the CAN message ID ranges 0x300 to 0x46FF, multiple CAN message IDs (0x401 to 0x440) can specify multiple cell current values ​​in units of a predetermined number according to cell current information (CCI). For example, “0x401” may be a CAN message ID that specifies cell current values ​​of battery cells 1 to 4 among multiple battery cells, and “0x402” may be a CAN message ID that specifies cell current values ​​of battery cells 5 to 8 among multiple battery cells. Each of the multiple CAN message IDs (0x401 to 0x440) may be associated with a corresponding CAN message. The corresponding CAN message may include cell current values ​​in units of a predetermined number specified by each CAN message ID in the cell current information (CCI). As described above, the cell current information (CCI) may be measured and generated by the first ADC circuit (320).

[0111] The CAN message ID range “0x500~0x6FF” is the CAN message ID range that the second CAN signal (CAN2) that transmits the status information of the BPS (30) described above to the CAN analysis device (20) can have.

[0112] Among the CAN message ID ranges 0x500 to 0x6FF, each of the plurality of CAN message IDs (0x501 to 0x540) can specify a plurality of battery cell voltage values ​​in units of a predetermined number according to cell voltage information (CVI). Each of the plurality of CAN message IDs (0x501 to 0x540) can be combined with a corresponding CAN message. The corresponding CAN message can include a predetermined number of cell voltage values ​​specified by each CAN message ID in the cell voltage information (CVI).

[0113] Among the CAN message ID range 0x500 to 0x6FF, each of the multiple CAN message IDs (0x601 to 0x60A) can specify each of the multiple battery pack current values ​​according to the pack current information (PCI). Each of the multiple CAN message IDs (0x601 to 0x60A) can be associated with a corresponding CAN message. The corresponding CAN message can include the pack current value specified by each CAN message ID in the pack current information (PCI).

[0114] Among the CAN message ID range 0x500 to 0x6FF, each of the multiple CAN message IDs (0x641 to 0x670) can specify each of the multiple temperature values ​​according to the temperature detection information (TSI). Each of the multiple CAN message IDs (0x641 to 0x670) can be associated with a corresponding CAN message. The corresponding CAN message can include the temperature value specified by each CAN message ID in the temperature detection information (TSI).

[0115] Among the CAN message ID range 0x500 to 0x6FF, each of the multiple CAN message IDs (0x6A1 to 0x6A2) can specify multiple relay switching values ​​in units of a predetermined number according to relay switching information (RCI). Each of the multiple CAN message IDs (0x6A1 to 0x6A2) can be combined with a corresponding CAN message. The corresponding CAN message can include a predetermined number of relay switching values ​​specified by each CAN message ID in the relay switching information (RCI).

[0116] Among the CAN message ID range 0x500 to 0x6FF, each of the multiple CAN message IDs (0x6C1 to 0x6C2) can specify each of the multiple output power values ​​according to the power information (PSI). Each of the multiple CAN message IDs (0x6C1 to 0x6C2) can be associated with a corresponding CAN message. The corresponding CAN message can include the output power value specified by each CAN message ID in the power information (PSI).

[0117] Among the CAN message ID range 0x500 to 0x6FF, each of the multiple CAN message IDs (0x6D1 to 0x6D2) can specify each of the multiple load current values ​​according to the load current information (LCI). Each of the multiple CAN message IDs (0x6D1 to 0x6D2) can be associated with a corresponding CAN message. The corresponding CAN message can include the load current value specified by each CAN message ID in the load current information (LCI).

[0118] The CAN message ID and the protocol for the CAN message are provided as an example to help understand the invention, and the invention is not limited thereto.

[0119] The test device (10) generates a BPS test signal (STS) based on test information indicating abnormal conditions such as overvoltage, overcurrent, and high temperature, and provides the BPS (30) with the signal, and analyzes the status information (MSI) of the BMS to test whether the BMS is responding normally in the abnormal condition. In this way, the test device (10) can test whether the BMS (40) is generating normal control outputs for various inputs that the BPS (30) provides to the BMS (40) in response to the BPS test signal (STS) indicating various status conditions for the target battery device.

[0120] Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements made by those skilled in the art using the basic concept of the present invention defined in the following claims also fall within the scope of the present invention.

Claims

1. A battery pack simulator (BPS) implemented to simulate multiple battery cells of a target battery device to be simulated and providing battery measurement information; A test device for generating a BPS test signal based on test information including the above battery measurement information; and A CAN analysis device that converts the BPS test signal into a first CAN signal and transmits it to the BPS, and receives a second CAN signal including the battery measurement information from the BPS, The above BPS is, A measuring instrument for providing the above battery measurement information; and A communication conversion device that receives the first CAN signal from the CAN analysis device, converts the first CAN signal according to the communication method of the measuring instrument to generate a first simulated control signal and provides the first CAN signal to the measuring instrument, and receives the battery measurement information from the measuring instrument and transmits the first CAN signal to the CAN analysis device. BMS (Battery Management System) performance test system.

2. In paragraph 1, The above BPS is, Further comprising a cell power simulator that generates and outputs multiple cell voltages of the multiple battery cells, The above communication conversion device, When the CAN message ID of the first CAN signal indicates multiple cell voltage simulations for the multiple battery cells, a second simulation control signal for the multiple cell voltages based on the CAN message of the first CAN signal is generated through the communication method of the cell power simulator and provided to the cell power simulator. BMS performance test system.

3. In paragraph 2, The above cell power simulator, As status information, the cell voltage information measuring a plurality of cell voltages output by the cell power simulator or the cell voltage information indicating a plurality of cell voltages according to the second simulation control signal is provided to the communication conversion device, The above communication conversion device generates a second CAN signal including the cell voltage information and transmits it to the CAN analysis device. BMS performance test system.

4. In paragraph 1, The above measuring instrument, An ADC (Analog Digital Converter) circuit that measures a plurality of cell currents flowing in a plurality of cell currents of the above plurality of battery cells, The above communication conversion device, When the first CAN signal instructs multiple cell current measurements for the plurality of battery cells, the first simulated control signal instructing multiple cell current measurements based on the CAN message of the first CAN signal is generated through a communication method of the ADC circuit and provided to the ADC circuit. BMS performance test system.

5. In paragraph 4, The above ADC circuit, Providing cell current information based on the plurality of cell currents to the communication conversion device, The above communication conversion device, Generating a second CAN signal including the above cell current information and transmitting it to the CAN analysis device, BMS performance test system.

6. In paragraph 1, The above measuring instrument, A pack current meter that measures the pack current flowing in the battery pack of the above target battery device, The above communication conversion device, When the first CAN signal indicates the pack current measurement, the first simulated control signal indicating the pack current measurement based on the CAN message of the first CAN signal is generated through the communication method of the pack current meter and provided to the pack current meter. BMS performance test system.

7. In paragraph 6, The above pack current meter is, Generate pack current according to the first simulated control signal, and transmit battery pack current information according to the first simulated control signal as status information to the communication conversion device, The above communication conversion device, Generating a second CAN signal including the battery pack current information and transmitting it to the CAN analysis device, BMS performance test system.

8. In paragraph 1, The above measuring instrument, A temperature measuring device for measuring the cell temperatures of the plurality of battery cells of the target battery device, The above communication conversion device, When the first CAN signal indicates temperature measurement for the plurality of battery cells, the first simulated control signal indicating the temperature of the plurality of battery cells based on the CAN message of the first CAN signal is generated through the communication method of the temperature measuring instrument and provided to the temperature measuring instrument. BMS performance test system.

9. In paragraph 8, The above temperature measuring instrument, Generate temperature detection information indicating a plurality of cell temperatures according to the first simulated control signal, and transmit the temperature detection information according to the first simulated control signal to the communication conversion device as status information, The above communication conversion device, Generating a second CAN signal including the above temperature detection information and transmitting it to the CAN analysis device, BMS performance test system.

10. In paragraph 1, The above measuring instrument, A load meter that generates load current information of the above target battery device, The above communication conversion device, When the first CAN signal instructs simulation of a load current flowing in a load connected to the target battery device, the first simulation control signal instructing a load current value based on a CAN message of the first CAN signal is generated through a communication method of the load meter and provided to the load meter. BMS performance test system.

11. In paragraph 10, The above load meter is, Generate load current information according to the first simulated control signal, and transmit the load current information as status information to the communication conversion device, The above communication conversion device, Generating a second CAN signal including the above load current information and transmitting it to the CAN analysis device, BMS performance test system.

12. In paragraph 1, The above measuring instrument, A relay meter that generates a signal indicating the opening or closing of each of a plurality of relays of the above target battery device, The above communication conversion device, When the first CAN signal instructs the opening and closing simulation of the plurality of relays, the first simulated control signal including information on the opening or closing of each of the plurality of relays based on the CAN message of the first CAN signal is generated through the communication method of the relay meter and provided to the relay meter. BMS performance test system.

13. In paragraph 12, The above relay meter is, Generate relay opening / closing information according to the first simulated control signal, and transmit the relay opening / closing information as status information to the communication conversion device, The above communication conversion device, Generating a second CAN signal including the relay opening / closing information and transmitting it to the CAN analysis device, BMS performance test system.

14. In paragraph 1, Further comprising a power supply device for generating output power, The above communication conversion device, When the first CAN signal indicates output power simulation, the first simulation control signal indicating an output power value based on a CAN message of the first CAN signal is generated through a communication method of the power supply device and provided to the power supply device. BMS performance test system.

15. In paragraph 1, The test device generates a BMS control signal that instructs a control command for a battery management system for the target battery device and transmits the signal to the CAN analysis device, The CAN analysis device converts the BMS control signal into a CAN signal, generates a third CAN signal, and transmits the third CAN signal to the battery management system, and receives a fourth CAN signal from the battery management system that instructs the control performed by the battery management system in response to the battery measurement information. BMS performance test system.

16. In paragraph 15, The above test device, Based on the above battery measurement information, the battery management system determines the control that needs to be performed, and determines whether the battery management system is normal based on the result of comparing the execution control indicated by the fourth CAN signal. BMS performance test system.

17. In paragraph 1, The first CAN signal includes a CAN message ID and a CAN message, and a control command and a control target for the BPS are specified according to the CAN message ID, and the CAN message includes simulation information necessary for a simulation operation to be performed by the control target of the BPS according to the control command. BMS performance test system.

18. In paragraph 1, The second CAN signal includes a CAN message ID and a CAN message, and the type of the battery measurement information is determined according to the CAN message ID, and the CAN message includes values ​​provided by the measuring device. BMS performance test system.

19. In paragraph 1, The above CAN analysis device, Converting the BPS test signal into the first CAN signal according to the CAN message ID and the protocol for the CAN message for the BPS control, The above communication conversion device, Converting the battery measurement information into the second CAN signal according to the above protocol, BMS performance test system.

20. In paragraph 19, The above protocol is, A first area for a CAN message ID for transmitting the first CAN signal from the CAN analysis device to the BPS; and A second area including a CAN message ID for transmitting the second CAN signal from the BPS to the CAN analysis device, BMS performance test system.

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