Vehicle battery replacement diagnostic device and method

Abstract

The present disclosure provides a vehicle battery replacement diagnostic device and method, which can accurately diagnose whether the battery has been replaced using the internal resistance of the battery. The device includes: a measurer for measuring the internal resistance of the battery; a memory for storing the measured internal resistance; and a controller for diagnosing whether the battery has been replaced based on the internal resistance. When the vehicle power is reset, the controller controls the measurer to measure the first internal resistance or the second internal resistance after the vehicle is started, updates and stores the measured first internal resistance or the second internal resistance in the memory, compares the current first internal resistance value with the previous first internal resistance value or compares the current second internal resistance value with the previous second internal resistance value, and when the corresponding internal resistance values are different from each other, diagnoses that the battery has been replaced.

Description

Technical Field

[0001] The present disclosure relates to a vehicle battery replacement diagnostic device and method, and more particularly, to a vehicle battery replacement diagnostic device and method that can accurately diagnose whether a battery has been replaced using the internal resistance of the battery. Background Art

[0002] Typically, conventional vehicle batteries employ a system that is only used when the vehicle's engine is started and is continuously charged while the vehicle is being driven to maintain the battery's full state of charge.

[0003] Recently, as systems for improving fuel efficiency have been applied, logic for diagnosing the state (temperature, SOC, lifespan, etc.) of a vehicle battery has been used.

[0004] However, if the battery has already been replaced, the fuel efficiency improvement system cannot accurately diagnose the battery condition and may provide inaccurate analysis results. As a result, due to the inaccurate analysis results, the system is likely to accelerate battery aging and have difficulty fully utilizing the available energy of the new battery.

[0005] However, in conventional methods for diagnosing whether a battery has been replaced, if the battery has been replaced, it is difficult to accurately diagnose whether the new battery is the same type as the previous battery or has the same capacity as the previous battery. Summary of the Invention

[0006] Therefore, it is necessary to develop a vehicle battery replacement diagnostic device that can accurately diagnose whether the battery has been replaced and accurately estimate the state of the new battery, thereby increasing the battery life and maximizing the use of battery energy.

[0007] Accordingly, the present disclosure is directed to a vehicle battery swap diagnostic apparatus and method that substantially obviates one or more problems due to limitations and disadvantages of the related art.

[0008] The present disclosure provides a vehicle battery replacement diagnostic device and method that can accurately diagnose whether a battery has been replaced and accurately estimate the state of the new battery based on a first internal resistance under low-frequency conditions and a second internal resistance under high-frequency conditions. Thus, the battery life can be increased and battery energy can be utilized to the greatest extent possible.

[0009] Other advantages, objects, and features of the present disclosure are set forth in part in the following description and in part will be apparent to those skilled in the art upon study of the following description or may be learned from practice of the present disclosure. The objects and other advantages of the present disclosure may be realized and attained by the structures particularly pointed out in the written description and claims as well as in the accompanying drawings.

[0010] To achieve these objectives and other advantages, and in accordance with the purposes of the present disclosure as embodied and broadly described herein, a vehicle battery replacement diagnostic device includes: a measurer configured to measure an internal resistance of a battery; a memory configured to store the measured internal resistance; and a controller configured to diagnose whether the battery has been replaced based on the internal resistance. When a vehicle power source is reset, the controller controls the measurer to measure a first internal resistance or a second internal resistance after the vehicle is started, update the measured first internal resistance or the second internal resistance and store the updated first internal resistance or the second internal resistance in the memory, compare a current first internal resistance value with a previous first internal resistance value or compare a current second internal resistance value with a previous second internal resistance value, and diagnose that the battery has been replaced when the corresponding internal resistance values differ from each other.

[0011] In another aspect of the present disclosure, a battery replacement diagnostic method of a vehicle battery replacement diagnostic device includes: confirming whether the vehicle is started; when the vehicle is started, measuring a first internal resistance or a second internal resistance; updating the measured first internal resistance or second internal resistance; and storing the updated first internal resistance or second internal resistance. The method further includes: confirming whether the vehicle power supply is reset; when the vehicle power supply is reset, confirming whether the vehicle is started; when the vehicle is started, measuring the first internal resistance or the second internal resistance again; updating the remeasured first internal resistance or the second internal resistance again, and storing the updated first internal resistance or the second internal resistance again; comparing the current first internal resistance value with the previous first internal resistance value or comparing the current second internal resistance value with the previous second internal resistance value; and as a result of the comparison, when the corresponding internal resistance values are different from each other, diagnosing that the battery has been replaced.

[0012] In yet another aspect of the present disclosure, a computer-readable recording medium recording a program for executing a vehicle battery replacement diagnostic method executes a process provided by the battery replacement diagnostic method.

[0013] In another aspect of the present disclosure, a vehicle includes a battery and a battery replacement diagnostic device. The device is configured to diagnose whether the battery has been replaced based on the internal resistance of the battery. The device includes: a measurer configured to measure the internal resistance of the battery; a memory configured to store the measured internal resistance; and a controller. The controller is configured to: when the vehicle power is reset, control the measurer to measure the first internal resistance or the second internal resistance after the vehicle is started; update the measured first internal resistance or the second internal resistance and store the updated first internal resistance or the second internal resistance in the memory; compare the current first internal resistance value with the previous first internal resistance value or compare the current second internal resistance value with the previous second internal resistance value; and when the corresponding internal resistance values are different from each other, diagnose that the battery has been replaced.

[0014] It is to be understood that both the foregoing general description and the following detailed description of the present disclosure are exemplary and explanatory and are intended to provide further explanation of the disclosure as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings provide a further understanding of the present disclosure and are incorporated herein to constitute a part of this application. The accompanying drawings illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure. In the drawings:

[0016] Figure 1 is a diagram showing a vehicle to which the battery replacement diagnostic device according to one embodiment of the present disclosure is applied;

[0017] Figure 2 is a block diagram illustrating a battery replacement diagnostic device according to an embodiment of the present disclosure;

[0018] Figures 3 to 5 is a diagram showing frequency characteristics of the internal resistance of a battery according to power applied to the battery;

[0019] Figure 6 and Figure 7 is a graph showing internal resistance of a battery according to aging of the battery;

[0020] Figure 8 and Figure 9 are graphs showing new battery replacement diagnosis for different types and capacities, respectively; and

[0021] Figure 10 1 is a flowchart illustrating a battery replacement diagnosis method of a battery replacement diagnosis device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0022] With specific reference to the preferred embodiments of the present disclosure, examples of which are shown in the accompanying drawings. However, the present disclosure is not limited to the embodiments set forth herein, and various modifications may be made. In the accompanying drawings, for the purpose of clearly describing the present disclosure, descriptions of elements not relevant to the present disclosure are omitted, and identical or similar elements are represented by the same reference numerals even if they are shown in different drawings.

[0023] In the following description of the embodiments, it should be understood that, unless otherwise stated, when a component “includes” an element, the component may further include other elements, and the presence of other such elements is not excluded. In addition, in the following description of the embodiments, it should be understood that the suffixes “component,” “unit,” and “module” represent units for a specific purpose or for processing at least one function, operation, etc., which can be implemented using hardware, software, or a combination of hardware and software. It can be said that such a unit is configured to meet the specific purpose or process at least one function, operation, etc. In addition, the controller described herein may include a processor programmed to perform the processes, functions, operations, etc.

[0024] In the following, reference is made to Figures 1 to 10 , a detailed description of a vehicle battery replacement diagnostic device and method that can be applied to the embodiments of the present disclosure.

[0025] Figure 1 1 is a diagram illustrating a vehicle to which the battery replacement diagnostic device according to one embodiment of the present disclosure is applied.

[0026] like Figure 1 As shown, the vehicle 1 may include a battery 100 and a battery replacement diagnostic device 200. The battery replacement diagnostic device 200 diagnoses whether the battery 100 has been replaced based on the internal resistance of the battery 100.

[0027] The battery replacement diagnostic device 200 may measure the first internal resistance or the second internal resistance after the vehicle 1 is started before the vehicle power is reset. When measuring the first internal resistance or the second internal resistance, the battery replacement diagnostic device 200 may update the first internal resistance or the second internal resistance and store the updated first internal resistance or the second internal resistance.

[0028] In one embodiment, the first internal resistance may be the internal resistance of the battery 100 when low-frequency power is applied to the battery 100. The second internal resistance may be the internal resistance of the battery 100 when high-frequency power is applied to the battery 100.

[0029] In another embodiment, the first internal resistance may be the internal resistance of the battery 100 when the engine speed of the vehicle 1 increases and the vehicle 1 is stopped. The second internal resistance may be the internal resistance of the battery 100 when the engine speed of the vehicle 1 increases and the vehicle 1 is traveling.

[0030] In addition, the battery replacement diagnostic device 200 can confirm whether the vehicle power supply has been reset, and when the battery replacement diagnostic device 200 confirms that the vehicle power supply has been reset, measure the first internal resistance or the second internal resistance after the vehicle 1 is started. The battery replacement diagnostic device 200 can update the measured first internal resistance or second internal resistance and store the updated first internal resistance or second internal resistance. The battery replacement diagnostic device 200 can compare the current first internal resistance value with the previous first internal resistance value, or compare the current second internal resistance value with the previous second internal resistance value. When the corresponding internal resistance values are different from each other, the battery replacement diagnostic device 200 can diagnose that the battery 100 has been replaced.

[0031] In this embodiment, the battery replacement diagnostic device 200 can confirm whether the current first internal resistance value is different from the previous first internal resistance value. When the current first internal resistance value is different from the previous first internal resistance value, the battery replacement diagnostic device 200 can diagnose that the battery 100 has been replaced.

[0032] When confirming whether the current first internal resistance value is different from the previous first internal resistance value, the battery replacement diagnostic device 200 can perform the following steps: when the current first internal resistance value is the same as the previous first internal resistance value, the battery replacement diagnostic device 200 can confirm whether the comparison between the current second internal resistance value and the previous second internal resistance value has been completed; when the comparison between the current second internal resistance value and the previous second internal resistance value has been completed, the battery replacement diagnostic device 200 can measure the internal resistance before resetting the vehicle power supply.

[0033] In this embodiment, when the comparison between the current second internal resistance value and the previous second internal resistance value has not been completed, the battery replacement diagnostic device 200 may measure the internal resistance after resetting the vehicle power supply.

[0034] In addition, the battery replacement diagnostic device 200 can confirm whether the current second internal resistance value is different from the previous second internal resistance value. When the current second internal resistance value is different from the previous second internal resistance value, the battery replacement diagnostic device 200 can diagnose that the battery 100 has been replaced.

[0035] When confirming whether the current second internal resistance value is different from the previous second internal resistance value, the battery replacement diagnostic device 200 can perform the following steps: when the current second internal resistance value is the same as the previous second internal resistance value, the battery replacement diagnostic device 200 can confirm whether the comparison between the current first internal resistance value and the previous first internal resistance value has been completed; when the comparison between the current first internal resistance value and the previous first internal resistance value has been completed, the battery replacement diagnostic device 200 can measure the internal resistance before resetting the vehicle power supply.

[0036] In this embodiment, when the comparison between the current first internal resistance value and the previous first internal resistance value has not been completed, the battery replacement diagnostic device 200 may measure the internal resistance after resetting the vehicle power source.

[0037] Figure 2 FIG. 1 is a block diagram illustrating a battery replacement diagnostic apparatus according to an embodiment of the present disclosure.

[0038] like Figure 2 As shown, the battery replacement diagnostic device 200 according to the present disclosure may include: a measurer for measuring the internal resistance of a battery; a memory for storing the measured internal resistance; and a controller for diagnosing whether the battery has been replaced based on the internal resistance.

[0039] In this embodiment, the measurer can measure the internal resistance of different batteries according to the frequency of power applied to the batteries.

[0040] In one embodiment, when the frequency of the power applied to the battery is low, the measurer may measure the internal resistance of the battery corresponding to the low frequency. When the frequency of the power applied to the battery is high, the measurer may measure the internal resistance of the battery corresponding to the high frequency.

[0041] Furthermore, the controller may control the measurer to measure the first internal resistance or the second internal resistance after the vehicle is started, update the measured first internal resistance or the second internal resistance, and store the updated first internal resistance or the second internal resistance in the memory.

[0042] In this embodiment, the first internal resistance may be the internal resistance of the battery when low-frequency power is applied to the battery, and the second internal resistance may be the internal resistance of the battery when high-frequency power is applied to the battery.

[0043] Depending on the situation, the first internal resistance may be the internal resistance of the battery when the vehicle's engine speed increases and the vehicle is stopped, and the second internal resistance may be the internal resistance of the battery when the vehicle's engine speed increases and the vehicle is traveling.

[0044] In updating and storing the measured first internal resistance or the second internal resistance, when the first internal resistance is measured, the controller may update the measured first internal resistance and store the updated first internal resistance.

[0045] In another embodiment, when updating and storing the measured first internal resistance or the second internal resistance, when measuring the second internal resistance, the controller may update the measured second internal resistance and store the updated second internal resistance.

[0046] Thereafter, the controller may confirm whether the vehicle power supply has been reset, and when the controller confirms that the vehicle power supply has been reset, may control the measurement device to measure the first internal resistance or the second internal resistance after the vehicle is started. The controller may update the measured first internal resistance or the second internal resistance and store the updated first internal resistance or the second internal resistance in the memory. The controller may compare the current first internal resistance value with the previous first internal resistance value, or compare the current second internal resistance value with the previous second internal resistance value. When the corresponding internal resistance values differ from each other, the controller may diagnose that the battery has been replaced.

[0047] In this embodiment, when measuring the first internal resistance, the controller may control the measurer to measure the internal resistance of the battery when low-frequency power is applied to the battery.

[0048] According to circumstances, when measuring the first internal resistance, the controller may control the measurer to measure the internal resistance of the battery when the rotation speed of the engine of the vehicle increases and the vehicle is in a stopped state.

[0049] In another embodiment, when measuring the second internal resistance, the controller may control the measurer to measure the internal resistance of the battery when high-frequency power is applied to the battery.

[0050] According to circumstances, when measuring the second internal resistance, the controller may control the measurer to measure the internal resistance of the battery when the rotation speed of the engine of the vehicle increases and the vehicle is in a running state.

[0051] Furthermore, when updating and storing the measured first internal resistance or the second internal resistance, when the first internal resistance is measured, the controller may update the measured first internal resistance and store the updated first internal resistance in the memory.

[0052] In another embodiment, when updating and storing the measured first internal resistance or the second internal resistance, when measuring the second internal resistance, the controller may update the measured second internal resistance and store the updated second internal resistance in the memory.

[0053] Thereafter, when comparing the current first internal resistance value with the previous first internal resistance value, the controller may confirm whether the current first internal resistance value is different from the previous first internal resistance value. When the current first internal resistance value is different from the previous first internal resistance value, the controller may diagnose that the battery has been replaced.

[0054] In this embodiment, when confirming whether the current first internal resistance value is different from the previous first internal resistance value, the controller may perform the following steps: when the current first internal resistance value is the same as the previous first internal resistance value, the controller may confirm whether the comparison between the current second internal resistance value and the previous second internal resistance value has been completed; when the comparison between the current second internal resistance value and the previous second internal resistance value has been completed, the controller may measure the internal resistance before resetting the vehicle power supply.

[0055] On the other hand, when confirming whether the comparison between the current second internal resistance value and the previous second internal resistance value has been completed, when the comparison between the current second internal resistance value and the previous second internal resistance value has not been completed, the controller may measure the internal resistance after resetting the vehicle power supply.

[0056] Furthermore, when comparing the current second internal resistance value with the previous second internal resistance value, the controller may confirm whether the current second internal resistance value is different from the previous second internal resistance value. When the current second internal resistance value is different from the previous second internal resistance value, the controller may diagnose that the battery has been replaced.

[0057] In this embodiment, when confirming whether the current second internal resistance value is different from the previous second internal resistance value, the controller may perform the following steps: when the current second internal resistance value is the same as the previous second internal resistance value, the controller may confirm whether the comparison between the current first internal resistance value and the previous first internal resistance value has been completed; when the comparison between the current first internal resistance value and the previous first internal resistance value has been completed, the controller may measure the internal resistance before resetting the vehicle power supply.

[0058] On the other hand, when confirming whether the comparison between the current first internal resistance value and the previous first internal resistance value has been completed, when the comparison between the current first internal resistance value and the previous first internal resistance value has not been completed, the controller may measure the internal resistance after resetting the vehicle power supply.

[0059] Thereafter, when diagnosing whether the battery has been replaced, when the controller diagnoses that the battery has been replaced, the controller may initialize aging status information of the new battery.

[0060] Thus, in the present disclosure, it is possible to accurately diagnose whether a battery has been replaced. The state of the new battery can be accurately estimated based on the first internal resistance under low-frequency conditions and the second internal resistance under high-frequency conditions. Therefore, the battery replacement diagnostic device 200 and its controller can increase the lifespan of the battery and maximize battery energy utilization.

[0061] Furthermore, in the present disclosure, even if the previous battery has been replaced with a new battery of a different type or capacity, it is possible to accurately diagnose that the battery has been replaced with a new battery, and the energy of the new battery can be utilized to the maximum extent due to the initialization of the battery aging status information.

[0062] In addition, in the present disclosure, the state of the battery can be estimated more accurately using the internal resistance of the battery under a low-frequency condition and the internal resistance of the battery under a high-frequency condition.

[0063] Figures 3 to 5 is a diagram showing frequency characteristics of the internal resistance of a battery according to power applied to the battery.

[0064] Figure 3 and Figure 4 is a circuit diagram showing a battery equivalent circuit. Figure 5 is a graph showing the internal resistance of a battery according to the power frequency.

[0065] like Figure 3 As shown, in the battery equivalent circuit, the internal resistance Z can be obtained using the following equation B .

[0066] Z B =Z C +Z1+Z2+…

[0067] In this embodiment, as the frequency of power applied to the battery increases, the value of Z1+Z2+ . . . may gradually decrease and converge to 0.

[0068] Therefore, if Figure 4 As shown, since Z1=0, Z2=0, ..., only Z is retained C value.

[0069] Thus, if Figure 5 As shown, it can be confirmed that the internal resistance of the battery changes depending on the frequency of the power applied to the battery.

[0070] Furthermore, as batteries age, corrosion of the battery increases, thereby increasing the internal resistance of the battery.

[0071] Figure 6 and Figure 7 is a graph showing internal resistance of a battery according to aging of the battery.

[0072] like Figure 6 As shown, as a battery ages, its internal resistance may increase.

[0073] In addition, if Figure 7 As shown, it can be confirmed that the internal resistance of the battery when high-frequency power is applied to the battery and the internal resistance of the battery when low-frequency power is applied to the battery change according to the aging state of the battery.

[0074] Therefore, the present disclosure can provide a battery replacement diagnostic algorithm using the difference D between the internal resistance A of the battery corresponding to high-frequency power application and the internal resistance B of the battery corresponding to low-frequency power application, which varies according to the aging state of the battery.

[0075] Furthermore, the present disclosure may utilize an alternator (or generator) used in a vehicle, rather than a separate power supply device.

[0076] In this embodiment, the AC generator is a device that rectifies AC power into DC power, but the AC generator is not fully rectified and thus may be provided in the form of a power source having a predetermined frequency.

[0077] The frequency of the alternator is proportional to the speed of the engine. As the engine speed increases, the alternator, a component of the engine, also rotates at an increased speed, so the frequency of the power supply increases.

[0078] Figure 8 and Figure 9 Graphs showing new battery replacement diagnosis for different types and capacities.

[0079] like Figure 8 As shown, if the battery has been replaced with a new battery of a different type and the same capacity, the internal resistance value of a 60Ah flooded-type battery can be measured and stored as follows until time until.

[0080] For example, the high-frequency internal resistance may be about 4 mΩ, the low-frequency internal resistance may be about 6 mΩ, and the difference between the high-frequency internal resistance and the low-frequency internal resistance may be about 2 mΩ.

[0081] After that, after resetting the power supply of the vehicle, the internal resistance value of the battery was measured as follows.

[0082] For example, the high-frequency internal resistance may be about 4 mΩ, the low-frequency internal resistance may be about 5 mΩ, and the difference between the high-frequency internal resistance and the low-frequency internal resistance may be about 1 mΩ.

[0083] Therefore, in the present disclosure, although the same high-frequency internal resistance is measured, the difference between the high-frequency internal resistance and the low-frequency internal resistance varies, and thus it can be diagnosed that the battery has been replaced with a different battery.

[0084] like Figure 9 As shown, if the battery has been replaced with a new battery of the same type but with a different capacity, the internal resistance value of a 60Ah AGM battery can be measured and stored as follows until time until.

[0085] For example, the high-frequency internal resistance may be about 3 mΩ, the low-frequency internal resistance may be about 5 mΩ, and the difference between the high-frequency internal resistance and the low-frequency internal resistance may be about 2 mΩ.

[0086] After that, after resetting the power supply of the vehicle, the internal resistance value of the battery was measured as follows.

[0087] For example, the high-frequency internal resistance may be about 3 mΩ, the low-frequency internal resistance may be about 4 mΩ, and the difference between the high-frequency internal resistance and the low-frequency internal resistance may be about 1 mΩ.

[0088] Therefore, in the present disclosure, although the same high-frequency internal resistance is measured, the difference between the high-frequency internal resistance and the low-frequency internal resistance varies, and thus it can be diagnosed that the battery has been replaced with a different battery.

[0089] Figure 10 1 is a flowchart illustrating a battery replacement diagnosis method of a battery replacement diagnosis device according to an embodiment of the present disclosure.

[0090] like Figure 10 As shown, in the present disclosure, first, it may be confirmed whether the vehicle is started ( S10 ), and when it is confirmed that the vehicle is started, the first internal resistance or the second internal resistance may be measured ( S20 or S40 ).

[0091] In this embodiment, the first internal resistance may be the internal resistance of the battery when low-frequency power is applied to the battery, and the second internal resistance may be the internal resistance of the battery when high-frequency power is applied to the battery.

[0092] Depending on the situation, the first internal resistance may be the internal resistance of the battery when the vehicle's engine speed increases and the vehicle is stopped, and the second internal resistance may be the internal resistance of the battery when the vehicle's engine speed increases and the vehicle is traveling.

[0093] Thereafter, in the present disclosure, the measured first internal resistance or second internal resistance may be updated, and then the updated first internal resistance or second internal resistance may be stored ( S30 or S50 ).

[0094] In this embodiment, in the present disclosure, when the first internal resistance is measured, the measured first internal resistance may be updated and stored. When the second internal resistance is measured, the measured second internal resistance may be updated and stored.

[0095] Thereafter, in the present disclosure, it may be confirmed whether the vehicle power source is reset ( S60 ).

[0096] Subsequently, when the vehicle power source is reset, it may be confirmed whether the vehicle is started ( S70 ) When the vehicle is started, the first internal resistance or the second internal resistance may be measured ( S80 or S110 ).

[0097] Thereafter, in the present disclosure, the measured first internal resistance or second internal resistance may be updated, and then the updated first internal resistance or second internal resistance may be stored ( S90 or S120 ).

[0098] Subsequently, in the present disclosure, a current first internal resistance value may be compared with a previous first internal resistance value ( S100 ), or a current second internal resistance value may be compared with a previous second internal resistance value ( S130 ).

[0099] Thereafter, in the present disclosure, as a result of the comparison, when the current first internal resistance value is different from the previous first internal resistance value, it may be diagnosed that the battery has been replaced ( S140 ).

[0100] On the other hand, in the present disclosure, as a comparison result, when the current first internal resistance value is the same as the previous first internal resistance value, it can be confirmed whether the comparison between the current second internal resistance value and the previous second internal resistance value has been completed (S150). When the comparison between the current second internal resistance value and the previous second internal resistance value has been completed, the internal resistance can be measured before resetting the vehicle power supply. When it is confirmed that the comparison between the current second internal resistance value and the previous second internal resistance value has not been completed, the internal resistance can be measured after resetting the vehicle power supply.

[0101] Furthermore, in the present disclosure, as a result of the comparison, when the current second internal resistance value is different from the previous second internal resistance value, it may be diagnosed that the battery has been replaced ( S140 ).

[0102] On the other hand, in the present disclosure, as a comparison result, when the current second internal resistance value is the same as the previous second internal resistance value, it can be confirmed whether the comparison between the current first internal resistance value and the previous first internal resistance value has been completed (S160). When it is confirmed that the comparison between the current first internal resistance value and the previous first internal resistance value has been completed, the internal resistance can be measured before resetting the vehicle power supply. When it is confirmed that the comparison between the current first internal resistance value and the previous first internal resistance value has not been completed, the internal resistance can be measured after resetting the vehicle power supply.

[0103] Furthermore, in the present disclosure, when it is diagnosed that the battery has been replaced, aging state information of the battery may be initialized ( S140 ).

[0104] As described above, in the present disclosure, it is possible to accurately diagnose whether a battery has been replaced and accurately estimate the state of the new battery based on the first internal resistance under low-frequency conditions and the second internal resistance under high-frequency conditions. Therefore, the battery replacement diagnostic method in the battery replacement diagnostic device can increase the life of the battery and maximize the use of battery energy.

[0105] Furthermore, in the present disclosure, even if the battery has been replaced with a new battery of a different type or capacity, it is possible to accurately diagnose whether the battery has been replaced, and the energy of the new battery can be utilized to the maximum extent due to the initialization of the battery aging status information.

[0106] Furthermore, in the present disclosure, the state of the battery may be estimated more accurately using the internal resistance of the battery under a low-frequency condition and the internal resistance of the battery under a high-frequency condition.

[0107] In addition, in the present disclosure, a computer-readable recording medium recording a program for executing the battery replacement diagnostic method of the vehicle battery replacement diagnostic device may execute a process provided by the battery replacement diagnostic method.

[0108] The above-mentioned method according to the present disclosure can be implemented as a computer-readable code in a computer-readable recording medium in which a program is recorded. Such a computer-readable recording medium may include all kinds of recording media in which data readable by a computer system is stored. As an example, a computer-readable recording medium may include a hard disk drive (HDD), a solid-state disk (SSD), a silicon disk drive (SDD), a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, and an optical data storage device, etc.

[0109] As should be apparent from the foregoing description, in the vehicle battery replacement diagnostic device and method according to at least one embodiment of the present disclosure, it is possible to accurately diagnose whether a battery has been replaced and accurately estimate the condition of the new battery based on the first internal resistance under low-frequency conditions and the second internal resistance under high-frequency conditions. Therefore, the vehicle battery replacement diagnostic device and method can increase the lifespan of the battery and maximize the use of battery energy.

[0110] In addition, in the device and method according to the present disclosure, even if the previous battery has been replaced with a new battery of a different type or different capacity, it can be accurately diagnosed that the battery has been replaced, and the energy of the new battery can be maximized due to the initialization of the battery aging status information.

[0111] Furthermore, in the present disclosure, the state of the battery may be estimated more accurately using the internal resistance of the battery under a low-frequency condition and the internal resistance of the battery under a high-frequency condition.

[0112] It should be apparent to those skilled in the art that various modifications and variations may be made to the present disclosure without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is intended to cover modifications and variations of the present disclosure that fall within the scope of the appended claims and their equivalents.

Claims

1. A vehicle battery replacement diagnostic device, comprising: A meter to measure the internal resistance of the battery; a memory for storing the measured internal resistance; as well as a controller that diagnoses whether the battery has been replaced based on the internal resistance, wherein, when a vehicle power source is reset, the controller controls the measurer to measure a first internal resistance or a second internal resistance after the vehicle is started, updates the measured first internal resistance or the second internal resistance and stores the updated first internal resistance or the second internal resistance in the memory, compares a current first internal resistance value with a previous first internal resistance value or compares a current second internal resistance value with a previous second internal resistance value, and diagnoses that the battery has been replaced when the corresponding internal resistance values are different from each other, When comparing the current second internal resistance value with the previous second internal resistance value, the controller confirms whether the current second internal resistance value is different from the previous second internal resistance value, When the current second internal resistance value is the same as the previous second internal resistance value, the controller confirms whether a comparison between the current first internal resistance value and the previous first internal resistance value has been completed, and The controller measures the internal resistance after resetting the vehicle power source when a comparison between the current first internal resistance value and the previous first internal resistance value has not been completed.

2. The device according to claim 1, wherein The measurer measures different internal resistances of the battery according to the frequency of power applied to the battery.

3. The device according to claim 1, wherein Before resetting the vehicle power supply, the controller controls the measurer to measure the first internal resistance or the second internal resistance after the vehicle is started, and when measuring the first internal resistance or the second internal resistance, updates the measured first internal resistance or the second internal resistance and stores the updated first internal resistance or the second internal resistance in the memory.

4. The device according to claim 3, wherein The first internal resistance is the internal resistance of the battery when low-frequency power is applied to the battery; and The second internal resistance is the internal resistance of the battery when high-frequency power is applied to the battery.

5. The device according to claim 3, wherein The first internal resistance is the internal resistance of the battery when the rotation speed of the engine of the vehicle increases and the vehicle is in a stopped state; and The second internal resistance is the internal resistance of the battery when the rotation speed of the engine of the vehicle increases and the vehicle is in a running state.

6. The device according to claim 1, wherein When comparing a current first internal resistance value with a previous first internal resistance value, the controller confirms whether the current first internal resistance value is different from the previous first internal resistance value, and when the current first internal resistance value is different from the previous first internal resistance value, diagnoses that the battery has been replaced.

7. The device according to claim 6, wherein Upon confirming whether the current first internal resistance value is different from the previous first internal resistance value, when the current first internal resistance value is the same as the previous first internal resistance value, the controller confirms whether a comparison between the current second internal resistance value and the previous second internal resistance value has been completed, and when the comparison between the current second internal resistance value and the previous second internal resistance value has been completed, measures the internal resistance before resetting the vehicle power supply.

8. The device according to claim 7, wherein In confirming whether the comparison between the current second internal resistance value and the previous second internal resistance value has been completed, when the comparison between the current second internal resistance value and the previous second internal resistance value has not been completed, the controller measures the internal resistance after resetting the vehicle power supply.

9. The device according to claim 1, wherein When comparing the current second internal resistance value and the previous second internal resistance value, the controller confirms whether the current second internal resistance value is different from the previous second internal resistance value, and when the current second internal resistance value is different from the previous second internal resistance value, diagnoses that the battery has been replaced.

10. The device according to claim 9, wherein Upon confirming whether the current second internal resistance value is different from the previous second internal resistance value, when the current second internal resistance value is the same as the previous second internal resistance value, the controller confirms whether a comparison between the current first internal resistance value and the previous first internal resistance value has been completed, and when the comparison between the current first internal resistance value and the previous first internal resistance value has been completed, measures the internal resistance before resetting the vehicle power supply.

11. A battery replacement diagnostic method for a vehicle battery replacement diagnostic device, comprising: confirming, by a processor, whether the vehicle is started; measuring, by a processor, a first internal resistance or a second internal resistance when the vehicle is started; updating, by a processor, the measured first internal resistance or the second internal resistance, and storing the updated first internal resistance or the second internal resistance; Confirming, through the processor, whether the vehicle power supply has been reset; confirming, by a processor, whether the vehicle is started when the vehicle power is reset; measuring, by a processor, the first internal resistance or the second internal resistance again when the vehicle is started; Updating, by a processor, the remeasured first internal resistance or the remeasured second internal resistance, and storing the re-updated first internal resistance or the second internal resistance; By means of a processor, comparing a current first internal resistance value with a previous first internal resistance value or comparing a current second internal resistance value with a previous second internal resistance value; as well as By the processor, as a result of the comparison, when the corresponding internal resistance values are different from each other, it is diagnosed that the battery has been replaced, In comparing the current second internal resistance value with the previous second internal resistance value, as a comparison result, when the current second internal resistance value is the same as the previous second internal resistance value, confirming whether the comparison between the current first internal resistance value and the previous first internal resistance value has been completed, and When comparison between the current first internal resistance value and the previous first internal resistance value has not been completed, internal resistance is measured after resetting the vehicle power source.

12. The method according to claim 11, wherein The first internal resistance is the internal resistance of the battery when low-frequency power is applied to the battery; and The second internal resistance is the internal resistance of the battery when high-frequency power is applied to the battery.

13. The method according to claim 11, wherein The first internal resistance is the internal resistance of the battery when the rotation speed of the engine of the vehicle increases and the vehicle is in a stopped state; and The second internal resistance is the internal resistance of the battery when the rotation speed of the engine of the vehicle increases and the vehicle is in a running state.

14. The method according to claim 11, wherein In comparing the current first internal resistance value with the previous first internal resistance value, as a result of the comparison, when the current first internal resistance value is different from the previous first internal resistance value, diagnosing that the battery has been replaced; as well as As a result of the comparison, when the current first internal resistance value is the same as the previous first internal resistance value, it is confirmed whether the comparison between the current second internal resistance value and the previous second internal resistance value has been completed, and when the comparison between the current second internal resistance value and the previous second internal resistance value has been completed, the internal resistance is measured before resetting the vehicle power supply.

15. The method according to claim 14, wherein In confirming whether the comparison between the current second internal resistance value and the previous second internal resistance value has been completed, when the comparison between the current second internal resistance value and the previous second internal resistance value has not been completed, the internal resistance is measured after resetting the vehicle power supply.

16. The method according to claim 11, wherein In comparing the current second internal resistance value with the previous second internal resistance value, as a result of the comparison, when the current second internal resistance value is different from the previous second internal resistance value, diagnosing that the battery has been replaced; as well as As a comparison result, when the current second internal resistance value is the same as the previous second internal resistance value, it is confirmed whether the comparison between the current first internal resistance value and the previous first internal resistance value has been completed, and when the comparison between the current first internal resistance value and the previous first internal resistance value has been completed, the internal resistance is measured before resetting the vehicle power supply. 17 . A computer-readable recording medium having recorded therein a program for executing the method according to claim 11 .

18. A vehicle comprising: Battery; as well as a battery replacement diagnostic device that diagnoses whether the battery has been replaced based on the internal resistance of the battery; Wherein, the battery replacement diagnostic device includes: a measuring device for measuring the internal resistance of the battery; a memory storing the measured internal resistance; and a controller that, when a vehicle power source is reset, controls the measurer to measure a first internal resistance or a second internal resistance after the vehicle is started, updates the measured first internal resistance or the second internal resistance and stores the updated first internal resistance or the second internal resistance in the memory, compares a current first internal resistance value with a previous first internal resistance value or compares a current second internal resistance value with a previous second internal resistance value, and diagnoses that the battery has been replaced when the corresponding internal resistance values are different from each other, When comparing the current second internal resistance value with the previous second internal resistance value, the controller confirms whether the current second internal resistance value is different from the previous second internal resistance value, When the current second internal resistance value is the same as the previous second internal resistance value, the controller confirms whether a comparison between the current first internal resistance value and the previous first internal resistance value has been completed, and The controller measures the internal resistance after resetting the vehicle power source when a comparison between the current first internal resistance value and the previous first internal resistance value has not been completed.

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