System and method for testing driving load of electric vehicle

Abstract

The present invention relates to a system and method for testing a driving load of an electric vehicle and, more particularly, to a system and method for testing a driving load of an electric vehicle which enables driving load testing of batteries mounted on various electric vehicles and / or batteries separated therefrom, without requiring actual driving and / or pedal operation of the electric vehicle.

Description

System and method for electric vehicle driving load testing

[0001] The present invention relates to a system and method for an electric vehicle driving load test, and more specifically, to a system and method for an electric vehicle driving load test that enables a driving load test on a battery mounted in various electric vehicles and / or a battery separated from said electric vehicle without actual driving and / or pedal operation of the electric vehicle.

[0002] Rechargeable batteries, which are easy to apply across various product categories and possess electrical characteristics such as high energy density, are widely used not only in portable devices but also in electric vehicles (EVs) or hybrid electric vehicles (HEVs) powered by electric sources. Along with the primary advantage of reducing fossil fuel consumption, these rechargeable batteries are currently attracting attention as a new energy source for enhancing eco-friendliness and energy efficiency, particularly because they generate no byproducts from energy usage.

[0003] Currently, interest in eco-friendly electric vehicles is rising worldwide to replace internal combustion engine vehicles that emit greenhouse gases. In line with this, the South Korean government has announced a policy to supply more than 3 million electric vehicles by 2030, and the current automotive market trend is rapidly shifting from internal combustion engine vehicles to electric vehicles.

[0004] As sales of electric vehicles have surged due to the high global interest in electric vehicles, technologies for measuring electric vehicle energy efficiency and evaluating battery performance are also advancing. Regarding energy efficiency measurement technology, the current method utilizes a chassis dynamometer system, which is an expensive piece of equipment, where the driver directly operates the pedals to correspond to a set speed pattern (or motor RPM pattern) and drives for a long period of time, such as about 6 to 12 hours.

[0005] Recently, a method in which a robot directly operates the pedals to respond to a set speed pattern instead of a driver has been utilized, but there is a limitation in that the total power consumed for energy efficiency measurement becomes excessively high due to long-term testing.

[0006] In addition, regarding battery performance evaluation technology, new electric vehicles generally utilize methods where the driver drives the vehicle directly according to road conditions or operates the pedals on a chassis dynamometer system. However, there is currently no evaluation method for used or remanufactured batteries.

[0007]

[0008] In order to overcome the aforementioned limitations, the inventor of the present invention presents a novel system and method for testing driving loads on electric vehicles, the details of which will be described below.

[0009]

[0010] (Prior Art Literature)

[0011] (Patent Document 1) Korean Registered Patent No. 10-0405683 'Chassis Dynamo Test System'

[0012] It was devised to solve the problems of the prior art described above,

[0013]

[0014] The present invention aims to provide a system and method for an electric vehicle driving load test that enables a driving load test on a battery mounted in various electric vehicles and / or a battery separated from said electric vehicles.

[0015] In addition, the present invention aims to provide a system and method for an electric vehicle driving load test that enables a driving load test on an electric vehicle / battery without operating the electric vehicle on a chassis dynamometer system or driving on an actual road.

[0016] In addition, the present invention aims to provide a system and method for an electric vehicle driving load test that enables a driving load test on a battery separated from the electric vehicle, since the electric vehicle is not actually driven.

[0017] In addition, the present invention aims to provide a system and method for an electric vehicle driving load test that enables one or more of energy efficiency, driving endurance performance, and battery remaining life evaluation to be performed through a single charge / discharger.

[0018] In addition, the present invention aims to provide a system and method for an electric vehicle driving load test that enables reliability and durability testing of a battery mounted on or separated from an electric vehicle.

[0019] In addition, the present invention aims to provide a system and method for an electric vehicle driving load test that enables the measurement of the electric vehicle's energy efficiency by considering both the driving load and power loads, such as air conditioning, for the load.

[0020] In addition, the present invention aims to provide a system and method for an electric vehicle driving load test that enables the specification of the battery's SOH value, allowing the driver to check information regarding the SOH value in real time, for example through an instrument panel, while seated in the vehicle.

[0021] The present invention may be implemented by an embodiment having the following configuration to achieve the aforementioned objectives.

[0022]

[0023] According to one embodiment of the present invention, a system for testing a driving load of an electric vehicle according to the present invention comprises: a battery having an energy storage configuration; and a charge / discharger that tests a driving load on the battery by charging and discharging the battery in accordance with time-series information of a preset charge / discharge pattern without operating the electric vehicle on which the battery is mounted.

[0024] According to another embodiment of the present invention, the charging and discharging device of the system for an electric vehicle driving load test according to the present invention is characterized by including a test mode setting module that sets any one of a fuel efficiency measurement mode, an endurance driving performance mode, and a battery remaining life evaluation mode of a connected battery.

[0025] According to another embodiment of the present invention, the charging and discharging device of the system for an electric vehicle driving load test according to the present invention comprises a first setting module for specifying first basic information for measuring the energy efficiency of an electric vehicle equipped with the battery; wherein the first basic information is characterized by including one or more of the following: the capacity of the battery, the weight of the electric vehicle equipped with the battery, the specifications and quantity of the motor of the electric vehicle, the power consumption of the battery, and the discharge termination condition.

[0026] According to another embodiment of the present invention, the charging and discharging device of the system for an electric vehicle driving load test according to the present invention comprises a second setting module for specifying second basic information for a durability test of the battery, wherein the second basic information includes one or more pieces of information among the power consumption of the battery and a discharge termination condition.

[0027] According to another embodiment of the present invention, the second setting module of the system for an electric vehicle driving load test according to the present invention is characterized by including a detailed mode setting module that specifies either an urban driving mode or a highway driving mode for a durability test of the battery.

[0028] According to another embodiment of the present invention, the charging / discharging device of the system for an electric vehicle driving load test according to the present invention comprises a third setting module for specifying third basic information for deriving the SOH value of the battery; wherein the third basic information comprises current battery state information, one or more of the current battery cell voltage, pack voltage, and SOH value, and discharge amount information of the charging / discharging device.

[0029] According to another embodiment of the present invention, the charging and discharging device of the system for an electric vehicle driving load test according to the present invention further comprises: a charging and discharging module that charges and discharges a connected battery in a manner corresponding to time-series information of a charging and discharging pattern stored in a database; and a power information collection module that collects time-series information regarding power during charging and discharging of the battery through the charging and discharging module.

[0030] According to another embodiment of the present invention, the power information collection module of the system for an electric vehicle driving load test according to the present invention is characterized by further acquiring BMS information and sensor information by one or more of a battery management system, an ICCU, and an MCU installed in the electric vehicle.

[0031] According to another embodiment of the present invention, the charging and discharging device of the system for an electric vehicle driving load test according to the present invention further comprises an analysis module that derives an analysis result based on time-series information on power acquired through the power information collection module, BMS information, and sensor information.

[0032] According to another embodiment of the present invention, the charging and discharging device of the system for an electric vehicle driving load test according to the present invention comprises: a charging and discharging module that charges and discharges a connected battery in a manner corresponding to time-series information of a charging and discharging pattern stored in a database; a power information collection module that collects time-series information regarding power during charging and discharging of the battery through the charging and discharging module; and an analysis module that derives an analysis result based on time-series information regarding power and BMS information obtained through the power information collection module; wherein the specified SOH value is displayed in real time on the instrument panel of the electric vehicle.

[0033] According to one embodiment of the present invention, a method for an electric vehicle driving load test according to the present invention comprises: a step of specifying one of a mode among an energy efficiency measurement mode, an endurance driving performance mode, and a battery remaining life evaluation mode of a battery connected to the charge / discharger; a step of specifying basic information required for each specified mode; a step of performing charge / discharge on the battery according to time series information regarding a charge / discharge pattern; a step of collecting time series information regarding power during charge / discharge of the battery; and a step of deriving an analysis result by comparing the time series information regarding power with BMS information.

[0034] According to another embodiment of the present invention, in a method for an electric vehicle driving load test according to the present invention, the step of deriving an analysis result is characterized by including a step of determining the electric vehicle's fuel efficiency by considering time-series information and sensor information regarding the power during charging and discharging of the battery.

[0035] According to another embodiment of the present invention, in a method for an electric vehicle driving load test according to the present invention, the step of specifying basic information includes a step of specifying either an urban driving mode or a highway driving mode when specifying the endurance driving performance mode; and the step of deriving an analysis result includes a step of specifying the endurance driving performance of the battery through time series information on power obtained by charging and discharging the battery to correspond to the urban driving mode or the highway driving mode.

[0036] According to another embodiment of the present invention, in a method for an electric vehicle driving load test according to the present invention, the step of specifying basic information comprises: a step of specifying the SOH value of the battery by confirming the deviation between the battery cell voltage according to the battery cell impedance in the acquired SOC value and the battery cell voltage according to the acquired BMS information.

[0037] The present invention has the following effects based on the configuration described above.

[0038]

[0039] The present invention has the effect of enabling driving load testing for batteries mounted on various electric vehicles and / or batteries separated from said electric vehicles.

[0040] In addition, the present invention has the effect of enabling driving load testing of an electric vehicle / battery without operating the electric vehicle on a chassis dynamometer system or driving on an actual road.

[0041] In addition, since the electric vehicle is not actually driven, the present invention has the effect of enabling a driving load test on a battery separated from the electric vehicle.

[0042] In addition, the present invention provides the effect of enabling one or more of the following to be performed through a single charge / discharge device: energy efficiency, driving endurance performance, and battery remaining life evaluation.

[0043] In addition, the present invention provides the effect of enabling reliability and durability testing for a battery mounted on or separated from an electric vehicle.

[0044] In addition, the present invention has the effect of enabling the measurement of the energy efficiency of an electric vehicle by considering both the driving load and power loads, such as air conditioning, on the load.

[0045] In addition, the present invention enables the specification of the battery's SOH value, thereby having the effect of allowing the driver to check information regarding the SOH value in real time, for example, through the instrument panel while seated in the vehicle.

[0046]

[0047] Meanwhile, it should be added that even if an effect is not explicitly mentioned here, the effects described in the following specification and the provisional effects expected by the technical features of the present invention are treated as described in the specification of the present invention.

[0048] FIG. 1 is a conceptual diagram illustrating a system for an electric vehicle driving load test according to an embodiment of the present invention;

[0049] FIG. 2 is a block diagram illustrating a system for an electric vehicle driving load test according to FIG. 1;

[0050] FIG. 3 is a block diagram for explaining a charge / discharger according to FIG. 1;

[0051] FIG. 4 is a block diagram for explaining a condition setting module according to FIG. 3;

[0052] Figure 5 is a graph for explaining the charge / discharge pattern;

[0053] FIG. 6 is a flowchart illustrating a method for an electric vehicle driving load test according to an embodiment of the present invention;

[0054] FIG. 7 is a flowchart for explaining step S20 according to FIG. 6;

[0055] FIG. 8 is a flowchart for explaining step S50 according to FIG. 6.

[0056] Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be interpreted as being limited to the embodiments below, but should be interpreted based on the matters described in the claims. Furthermore, these embodiments are provided merely for reference to more completely explain the present invention to those with average knowledge in the art.

[0057] As used herein, the singular form may include the plural form unless the context clearly indicates otherwise. Additionally, as used herein, “comprise” and / or “comprising” specify the presence of the mentioned features, numbers, steps, actions, parts, elements, and / or groups thereof, and do not exclude the presence or addition of one or more other features, numbers, actions, parts, elements, and / or groups.

[0058] Furthermore, when a pair of components is described as being "connected" to each other below, it is understood as a concept expressing not only direct connection between the components but also connection through a third component.

[0059]

[0060] FIG. 1 is a conceptual diagram for explaining a system for an electric vehicle driving load test according to one embodiment of the present invention; FIG. 2 is a block diagram for explaining a system for an electric vehicle driving load test according to FIG. 1.

[0061]

[0062] Hereinafter, a system (1) for a battery driving load test of an electric vehicle according to one embodiment of the present invention will be described in detail with reference to the attached drawings.

[0063]

[0064] Referring to FIGS. 1 and 2, the present invention relates to a system (1) for an electric vehicle driving load test, and more specifically, to a system (1) for an electric vehicle driving load test that enables a driving load test on a battery mounted on various electric vehicles and / or a battery separated from said electric vehicles without actual driving of the electric vehicle and / or pedal operation.

[0065] To this end, the system (1) for electric vehicle driving load testing may include a battery (10), a charger / discharger (30), and an energy storage device (50). The hardware configuration including each module of the charger / discharger (30) described below may be formed as a single unit, or, depending on the case, may be formed as a plurality of physically independent units, and the scope of the present invention is not limited by specific examples.

[0066] In addition, the term 'electric vehicle' above is understood as a concept that includes all pure electric vehicles (Electric Vehicle; EV), hybrid electric vehicles (Hybrid Electric Vehicle; HEV), plug-in hybrid electric vehicles (Plug-in Hybrid Electric Vehicle; PHEV), hydrogen electric vehicles (Fuel Cell Electric Vehicle; FCEV), etc.

[0067]

[0068] The battery (10) is a battery configuration that is mounted on an electric vehicle or separated from the electric vehicle. Generally, the electric vehicle battery (10) includes a battery pack, and the battery pack may include a plurality of battery modules. Additionally, the battery modules may include a plurality of battery cells. Individual battery modules may be connected in series and / or parallel with one another. Additionally, the battery (10) may be electrically connected to a charge / discharger (30) using power lines such as cables. Furthermore, the battery (10) may include a battery management system (110). In the following description, when the term "battery (10)" is used, it is understood to refer to any one of a battery cell, a battery module, and a battery pack.

[0069] A Battery Management System (110) (BMS) is a system configuration that acquires BMS information, such as the current, voltage, or temperature of a battery (10), and controls the battery (10) to perform optimally. Through this Battery Management System (110), battery-related information can be monitored, and overcharging and / or over-discharging can be prevented. Additionally, the Battery Management System (110) can cut off the power input to the battery by controlling the operation of a Power Relay Assembly (PRA) in the event of overcharging and / or over-discharging of the battery (10). Furthermore, the Battery Management System (30) is configured to communicate with individual Electronic Control Units (ECUs; not shown) installed in the electric vehicle.

[0070] The above term 'BMS information' may include information on one or more of the battery (10) cell voltage, battery (10) pack voltage, battery (10) consumption current and input current, battery (10) power consumption, and battery (10) internal impedance (or battery (10) internal resistance value).

[0071]

[0072] FIG. 3 is a block diagram for explaining a charge / discharger according to FIG. 1.

[0073]

[0074] Referring to FIGS. 1 to 3, the charging / discharging device (30) is configured as a device for charging and discharging a battery (10). Through this charging / discharging device (30), the battery (10) can be made into a fully charged state, a fully discharged state, or a partially charged state. Additionally, the charging / discharging device (30) may be electrically connected to the battery (10) by a power line connected through a connector, for example. Alternatively, the charging / discharging device (30) may be electrically connected to the battery (10) mounted on the electric vehicle by a charging port formed in the electric vehicle. Accordingly, the charging / discharging device (30) may acquire BMS information from the battery management system (110). With such a connection structure, the charging / discharging device (30) can perform a driving load test of the battery (10).

[0075] To this end, the charging / discharging device (30) may include a test mode setting module (310), a condition setting module (320), a charging / discharging module (330), a power information collection module (340), an analysis module (350), and a database (360).

[0076] The test mode setting module (310) is a module for setting one of the following modes for testing the connected battery (10): a fuel efficiency measurement mode, an endurance driving performance mode, and a battery remaining life evaluation mode. The user can determine the test mode of the battery (10) by inputting (e.g., touch input) any one of the three modes displayed on the display (not shown) of the charger / discharger (30). Alternatively, the user may input any one of the three modes through a user terminal that communicates with the charger / discharger (30) via wired or wireless communication, and there are no separate limitations thereon. The above 'user terminal' may be any known configuration capable of communicating with the charger / discharger (30), such as a smartphone, laptop, or PC, and the scope of the present invention is not limited by specific examples.

[0077] The 'Energy Efficiency Measurement Mode' is a mode for measuring the energy efficiency (e.g., km / kWh) of an electric vehicle equipped with or to be equipped with a battery (10). Additionally, the 'Durability Driving Performance Mode' is a mode for testing battery reliability / durability. Furthermore, the 'Battery Remaining Health Evaluation Mode' is a mode for determining the State of Health (SOH) of the battery. In this way, after selecting each mode in the charger / discharger (30), a result value (at least one of the electric vehicle's energy efficiency, battery durability, and battery SOH value) can be obtained solely by charging and discharging the battery (10) through the charger / discharger (30). Therefore, the advantage is that a user testing the battery (10) or the electric vehicle can determine at least one of the energy efficiency, durability driving performance, and SOH value without having to drive the electric vehicle equipped with the battery (10) for a long time. It should be noted that the test mode setting module (310) is not an essential component of the present invention, and that the charge / discharger (30) may perform only one of the following: energy efficiency measurement, durability driving performance specification, and battery remaining life evaluation.

[0078]

[0079] FIG. 4 is a block diagram for explaining a condition setting module according to FIG. 3.

[0080]

[0081] Referring to FIGS. 1 to 4, the condition setting module (320) is a module that sets basic information for each mode selected by the test mode setting module (310). The setting of basic information may be performed by a user inputting basic information on a screen displayed on the display unit (not shown) of the charger / discharger (30), or through a user terminal communicating with the charger / discharger (30) via wired or wireless communication, and there are no separate limitations thereon.

[0082] To this end, the condition setting module (320) may include a first setting module (321), a second setting module (323), and a third setting module (325).

[0083] The first setting module (321) is a module that specifies basic information for the energy efficiency measurement mode. For example, the basic information for the energy efficiency measurement mode may include one or more pieces of information such as the capacity (kW) of the battery (10), the weight (kgf) of the electric vehicle in which the battery (10) is mounted, the specifications and quantity of the motor of the electric vehicle (e.g., whether it is a front wheel, rear wheel, or in-wheel motor), battery power consumption, and discharge termination conditions.

[0084] Battery power consumption may be the power consumption (kW) of the battery (10) obtained through one of the test methods of SCT (Single Cycle Test), MCT (Multi Cycle Test), SMCT (Short MCT), and SMCT+, for example, through the aforementioned chassis dynamometer system. This battery power consumption may vary depending on the vehicle type, battery type, or powertrain of the electric vehicle. Additionally, battery power consumption may be classified and stored in a database (360) by vehicle type, battery type, or powertrain of the electric vehicle, in addition to user input, and the information stored in the database (360) may be continuously updated.

[0085] In addition, the discharge termination condition is a condition regarding the discharge limit of the battery (10) to be tested, and, for example, the condition can be set based on the State of Charge (SOC) of the battery (10). For example, the discharge termination condition can be set to 5% SOC, but the scope of the present invention is not limited by the above numerical range. Alternatively, the discharge termination condition can be set to the amount of power at which the output power of the battery (10) cannot maintain a preset speed, such as 100 km / h of the electric vehicle. The discharge termination condition can be set through various other criteria.

[0086] The second setting module (323) is a module that specifies basic information for a durability test of the battery (10), that is, for a durability driving performance mode. For example, the basic information for the durability driving performance mode may include one or more pieces of information such as battery power consumption and discharge termination conditions. The battery power consumption may be substantially the same as the battery power consumption of the first setting module (321). In addition, the discharge termination condition may be, for example, a condition of SOC 0% or 5% or less, but the scope of the present invention is not limited by the above numerical range. In addition, the second setting module (323) may include a detailed mode setting module (3231).

[0087] The detailed mode setting module (3231) is a module for setting detailed modes to test the endurance driving performance of the battery (10), and the detailed modes may include an Urban Dynamometer Driving Schedule (UDDS) and a Highway Fuel Economy Driving Schedule (HFEDS). Additionally, the detailed mode setting module (3231) may further include a variable mode (or harsh mode).

[0088] The third setting module (325) is a module that specifies basic information for deriving the SOH value of the battery (10). For example, the basic information for deriving the SOH value may include current state information of the battery (10), such as the cell voltage, pack voltage, and SOC value of the current battery (10), and the discharge amount of the charger / discharger (30) (e.g., a preset percentage of the battery (10) capacity or a specified discharge load value of the battery (10)). Additionally, the basic information for deriving the SOH value may include information regarding the relationship between the battery's SOC value (e.g., SOC 0~100%) and the battery's cell voltage. Such basic information for deriving the SOH value may be automatically acquired through user input via a display unit and / or communication with the battery management system (110), and there are no separate limitations thereon.

[0089]

[0090] Figure 5 is a graph illustrating the charge / discharge pattern.

[0091]

[0092] Referring to FIGS. 1 to 5, the charging / discharging module (330) is a module that performs charging and discharging for a battery (10) that is mounted on an electric vehicle or separated from the electric vehicle. To explain the charging / discharging method by example, one side of the charging / discharging device (30) is connected to the discharge resistor of the battery (10) so that the amount of discharge of the battery (10) can be increased or decreased according to the load factor. Also, when charging the battery (10), regenerative current can be stored through the charging / discharging device (30) or an energy storage device (50) connected to the battery (10). Generally, since the electric vehicle is capable of regenerative braking, it is desirable for the charging / discharging module (330) to perform charging as well as discharging.

[0093] Additionally, a charge / discharge pattern for charging and discharging the battery (10) can be stored in a database (360). That is, in order to determine the electric vehicle's energy efficiency, driving performance, and SOH value, a standard charge / discharge pattern must exist. At this time, it is desirable that the charge / discharge pattern be the same for each electric vehicle and each battery (10). Referring to FIG. 5, the charge / discharge pattern is preferably such that, for example, the x-axis represents time and the y-axis represents power consumption. In FIG. 5, when the y-axis is less than 0, it represents the amount of power charged to the battery (10) when regenerative braking is performed, and when it is greater than 0, it may represent the amount of power discharged from the battery (10). Additionally, the black area represents power consumption (or cumulative power consumption).

[0094] Furthermore, the charge-discharge patterns serving as specific standards for fuel efficiency, endurance performance, and SOH value may be identical or different. Additionally, the charge-discharge patterns for urban driving mode and highway driving mode may also be identical or different.

[0095] Accordingly, the charging / discharging module (330) can determine the electric vehicle's fuel efficiency, the driving performance of the battery (10), and the SOH value of the battery (10) by charging and discharging the battery (10) according to a reference pattern. Therefore, information regarding fuel efficiency, driving performance, and SOH value can be determined even without the operator directly driving the electric vehicle for a long time or operating the pedal on the chassis dynamometer system. In other words, it is possible to prevent the operator from performing work for a long time to determine the above information, and to prevent human error such as the operator operating the pedal inconsistent with the speed pattern. In addition, it can also have advantages such as reduced electricity consumption and shortened overall test time by minimizing the application of the chassis dynamometer system.

[0096] Referring to FIGS. 1 to 3, the power information collection module (340) is a module that collects time-series information regarding the power during the charging and discharging of the battery (10) through the charging and discharging module (330). In addition to the time-series information regarding the power of the battery (10), the power information collection module (340) may further collect time-series information regarding the voltage and / or current during the charging and discharging of the battery (10). Furthermore, the power information collection module (340) may further collect sensor information.

[0097] Sensor information is information obtained through the battery management system (110), ICCU (Integrated Charging Control Unit), MCU (Micro Controller Unit), etc. installed in the electric vehicle, and may be information obtained from, for example, an accelerator pedal sensor, an inverter sensor, a current and / or voltage sensor of the battery (10), and a sensor connected to the air conditioning system of the electric vehicle, for example, a temperature sensor.

[0098] The analysis module (350) is a module that derives an analysis result by comparing time-series information on power obtained through the power information collection module (340) with BMS information. At this time, sensor information obtained through the power information collection module (340) can also be utilized. Generally, parameters linked to the power load include temperature and voltage / current according to the operation of the air conditioning system. Therefore, the analysis module (350) can analyze the power operation status of the battery (10) by utilizing one or more of the time-series information on the power of the battery (10), BMS information, and sensor information.

[0099] When measuring the electric vehicle's energy efficiency through the analysis module (350), the energy efficiency may be determined by charging and discharging the battery (10) through the charge / discharge module (330) according to the charge / discharge pattern stored in the database (360) based on the total power consumption stored in the database (360). As previously mentioned, the power consumption may vary depending on the type of electric vehicle, the type of battery (10), or the powertrain of the electric vehicle. At this time, the discharge of the battery (10) may be performed until the discharge termination condition specified in the first setting module (321).

[0100] Additionally, when determining the durability driving performance of the battery (10) through the analysis module (350), the durability driving performance of the battery (10) can be determined by charging and discharging the battery (10) through the charge / discharge module (330) to correspond to the urban driving mode or highway driving mode determined by the detailed mode setting module (3231). At this time, the durability driving performance of the battery (10) can be determined by, for example, discharging it to an SOC of 0% or 5% or less and then recharging it. The charge / discharge pattern may be the same or different for the urban driving mode and the highway driving mode, but the latter is preferred.

[0101] Then, when the SOH value is determined through the analysis module (350), the relationship between the SOC value of the battery (10) (e.g., SOC 0~100%) and the cell voltage of the battery (10) and the discharge amount of the charger / discharger can be set through the third setting module (325). Then, the charging / discharging of the battery (10) is performed through the charging / discharging module (330), and the analysis module (350) can determine the SOH value of the battery (10) by checking the relationship between the SOC value of the battery (10) (e.g., SOC 0~100%) and the cell voltage of the battery (10) and the deviation from the cell voltage of the battery (10) according to the internal impedance of the battery (10) in the acquired BMS information through the first setting module (321).

[0102] The database (360) may include time-series information regarding the aforementioned charge / discharge pattern. Time-series information regarding the charge / discharge pattern may refer to time-series information regarding the power consumption pattern when following a predetermined speed pattern during a chassis dynamometer system for testing an electric vehicle or battery (10) or during actual driving. This power consumption pattern may be time-series data, and the database (360) may define the amount of current (or power) required for charging / discharging per cycle, such as 1 / 100th of a second or 1 / 1000th of a second. In the case of an electric vehicle, since regenerative braking is possible, it is also necessary to define the amount of current required for charging. Additionally, the database (360) may also include information regarding the total power consumption during charging / discharging according to the aforementioned charge / discharge pattern.

[0103] In this way, by utilizing the charging / discharging device (30) according to one embodiment of the present invention, it is possible to determine the energy efficiency through simple charging and discharging operations without the need to test the electric vehicle on a chassis dynamometer system or drive it in real life. In addition, it is also possible to test the reliability and durability of the battery (10) that is installed in the electric vehicle or separated from the electric vehicle. Furthermore, although there is currently no clear method for testing the battery (10) after remanufacturing, since the charging / discharging device (30) can also test the battery (10) separated from the electric vehicle, it is also possible to test the battery (10) after repair.

[0104] In addition, by charging and discharging the battery (10) according to a charging and discharging pattern that is substantially identical to the actual driving of the electric vehicle, it is possible to measure and calculate the fuel efficiency according to the driving load according to the road, and by utilizing sensor information, the influence of power loads such as air conditioning on the fuel efficiency can also be considered. Along with this, since the SOH value of the battery (10) can be specified, the driver can check information about the SOH value in real time, for example, on the instrument panel while riding in the electric vehicle.

[0105]

[0106] FIG. 6 is a flowchart illustrating a method for an electric vehicle driving load test according to an embodiment of the present invention.

[0107]

[0108] Hereinafter, a method (S1) for an electric vehicle driving load test according to an embodiment of the present invention will be described in detail with reference to the attached drawings. It should be noted that when performing the above method (S1), the charging / discharging device (30) is connected to the battery (10) by a power line, etc.

[0109] In addition, it should be noted that where specific embodiments may be implemented differently, the order of execution of each step may differ from the order described below. For example, two steps described consecutively may be performed substantially simultaneously or in the reverse order.

[0110]

[0111] Referring to FIG. 6, first, to test the battery (10) connected to the charger / discharger (30), a test mode of the battery (10) is specified (S10). The test mode may be any one of the fuel efficiency measurement mode, the endurance driving performance mode, and the battery remaining life evaluation mode as described above. Then, step S10 can be performed by a test mode setting module (310).

[0112]

[0113] FIG. 7 is a flowchart for explaining step S20 according to FIG. 6.

[0114]

[0115] Referring to FIGS. 6 and FIGS. 7, the basic information required in the selected mode can then be specified through step S10 (S20).

[0116] In step S10, when the electric vehicle measurement mode is specified, first basic information such as the capacity (kW) of the battery (10), the weight (kgf) of the electric vehicle in which the battery (10) is mounted, the specifications and quantity of the motor of the electric vehicle (e.g., whether it is a front wheel, rear wheel, or in-wheel motor), the battery power consumption, and the discharge termination condition may be specified (S210).

[0117] In addition, if the endurance driving performance mode is specified in step S10, second basic information such as the battery (10) power consumption and discharge termination condition may be specified (S230).

[0118] Finally, if the remaining evaluation mode is specified in step S10, the current battery (10) status information, such as the cell voltage, pack voltage, and SOC value of the current battery (10), and third basic information, such as the discharge amount of the charger / discharger (30) (e.g., a preset percentage of the battery (10) capacity or a discharge load value specified by the battery (10)), may be specified (S250). Additionally, for the remaining evaluation mode, different information may be specified for the city driving mode, highway driving mode, and detailed mode.

[0119] Step S20, including steps S210 to S250 as described above, can be performed through a condition setting module (320).

[0120] Referring to FIG. 6, charging and discharging of the battery (10) connected to the charging and discharging device (30) can then be performed (S30). At this time, time-series information regarding the charging and discharging pattern of the battery (10) may be stored in the database (360). Step S30 can be performed through the charging and discharging module (330).

[0121] Subsequently, time-series information regarding the power during charging and discharging of the battery (10) according to step S30 can be collected (S40). In addition, sensor information can also be acquired in step S40. Furthermore, BMS information can also be acquired in step S40.

[0122]

[0123] FIG. 8 is a flowchart for explaining step S50 according to FIG. 6.

[0124]

[0125] Referring to FIGS. 6 and FIGS. 8, the time series information on power obtained in step S40 can be compared with the BMS information obtained from the battery management system (110) to derive an analysis result (S50).

[0126] For example, in step S50, information regarding the electric vehicle in which the battery (10) is installed or will be installed can be determined (S510). When determining the electric vehicle's fuel efficiency through step S510, since the fuel efficiency is affected not only by the driving load according to the road but also by power loads such as air conditioning, it is desirable to make a determination by considering sensor information and BMS information.

[0127] In addition, information regarding the driving endurance performance of the battery (10) may be derived in step S50 (S530). When determining the driving endurance performance through step S530, the driving endurance performance of the battery (10) can be determined through time series information regarding the power charged and discharged to correspond to the determined urban driving mode or highway driving mode. At this time, the driving endurance performance of the battery (10) can be determined by, for example, discharging it to SOC 0% or 5% or less and then recharging it.

[0128] And in step S50, the SOH value of the battery (10) may be determined (S550). In step S550, the SOC value of the battery (10) may be determined by performing charging and discharging of the battery (10) and checking the difference between the cell voltage of the battery (10) and the cell voltage of the battery (10) according to the cell impedance of the battery (10) in the acquired BMS information (e.g., SOC 0~100%).

[0129]

[0130] The above detailed description is illustrative of the present invention. Furthermore, the foregoing describes preferred embodiments of the present invention, and the present invention may be used in various other combinations, modifications, and environments. That is, modifications or alterations are possible within the scope of the concept of the invention disclosed herein, the scope equivalent to the written disclosure, and / or the scope of the art or knowledge. The foregoing embodiments describe the best state for implementing the technical concept of the present invention, and various modifications required for specific fields of application and uses of the present invention are also possible. Accordingly, the above detailed description of the invention is not intended to limit the present invention to the disclosed embodiments.

Claims

1. A battery of energy storage configuration; and A system for testing a driving load on an electric vehicle, characterized by including a charge / discharger that tests a driving load on the battery by charging and discharging the battery in a manner corresponding to time series information of a preset charge / discharge pattern without operating the electric vehicle equipped with the battery.

2. In paragraph 1, the above-mentioned charge / discharger A system for electric vehicle driving load testing characterized by including a test mode setting module for setting any one of a connected battery energy efficiency measurement mode, an endurance driving performance mode, and a battery remaining life evaluation mode.

3. In paragraph 1, the charge / discharger It includes a first setting module for specifying first basic information for measuring energy efficiency for an electric vehicle equipped with the above battery; and The above first basic information is A system for an electric vehicle driving load test characterized by including one or more pieces of information among the capacity of the battery, the weight of the electric vehicle in which the battery is mounted, the specifications and quantity of the motor of the electric vehicle, the power consumption of the battery, and the discharge termination condition.

4. In paragraph 1, the charge / discharger It includes a second setting module for specifying second basic information for a durability test of the above battery; and The above second basic information is A system for electric vehicle driving load testing characterized by including one or more pieces of information among the power consumption and discharge termination conditions of the above-mentioned battery.

5. In paragraph 4, the second setting module is A system for an electric vehicle driving load test characterized by including a detailed mode setting module that specifies either a city driving mode or a highway driving mode for a durability test of the above-mentioned battery.

6. In paragraph 1, the charge / discharger It includes a third setting module for specifying third basic information for deriving the SOH value of the above battery; and The above third basic information is A system for an electric vehicle driving load test characterized by including current battery status information, one or more of the current battery cell voltage, pack voltage, and SOC value, and discharge amount information of the charger / discharger.

7. In any one of paragraphs 3 to 5, the charge / discharger A charging / discharging module that charges and discharges a connected battery in a manner corresponding to time-series information of charging / discharging patterns stored in a database; and A system for electric vehicle driving load testing, further comprising a power information collection module that collects time-series information on power during charging and discharging of the battery through the charge / discharge module.

8. In paragraph 7, the power information collection module is A system for electric vehicle driving load testing characterized by further acquiring BMS information and sensor information by any one or more of a battery management system, ICCU, and MCU installed in an electric vehicle.

9. In paragraph 8, the above-mentioned charge / discharger A system for electric vehicle driving load testing, further comprising: an analysis module that derives an analysis result based on time-series information on power, BMS information, and sensor information acquired through the power information collection module.

10. In paragraph 6, the above-mentioned charge / discharger A charging / discharging module that charges and discharges a connected battery in a manner corresponding to time-series information of charging / discharging patterns stored in a database; A power information collection module that collects time-series information on power during charging and discharging of the battery through the above-mentioned charging and discharging module; and It includes an analysis module that derives an analysis result based on time-series information and BMS information regarding power acquired through the power information collection module; The above specified SOH value is A system for electric vehicle driving load testing characterized by real-time display on the instrument panel of the electric vehicle.

11. A method for an electric vehicle driving load test using a system for an electric vehicle driving load test pursuant to Paragraph 2, A step of specifying one of the following modes: an energy efficiency measurement mode, an endurance driving performance mode, and a battery remaining life evaluation mode of a battery connected to the above-mentioned charger / discharger; Step of specifying the basic information required for each specific mode; A step of performing charging and discharging on the battery according to time series information regarding the charging and discharging pattern; A step of collecting time-series information on power during charging and discharging of the battery; and A method for an electric vehicle driving load test characterized by including the step of deriving an analysis result by comparing time series information and BMS information regarding the above power.

12. In Clause 11, the step of deriving the analysis result above is A method for an electric vehicle driving load test characterized by including the step of determining the electric vehicle's fuel efficiency by considering time series information and sensor information regarding the power during charging and discharging of the battery.

13. In Clause 11, the above-mentioned basic information specification step is When specifying the above endurance driving performance mode, the method includes the step of specifying either the city driving mode or the highway driving mode; The above analysis result derivation step is A method for an electric vehicle driving load test characterized by including the step of determining the driving endurance performance of the battery through time series information on power obtained by charging and discharging the battery to correspond to the above urban driving mode or highway driving mode.

14. In Paragraph 11, the above-mentioned basic information specification step is A method for an electric vehicle driving load test characterized by including the step of determining the SOH value of the battery by checking the deviation between the cell voltage of the battery and the battery cell voltage according to the battery cell impedance in the acquired SOC value.

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