A method and system for detecting consistency of battery replacement in a vehicle

Abstract

The present invention provides a method and system for detecting the consistency of battery replacement in a vehicle, belonging to the technical field of vehicle batteries. It solves the problem in the prior art that there is no detection of whether the battery matches the vehicle after the battery is replaced, which makes it easy for the vehicle to be difficult to start normally when the replaced battery does not match. A method for detecting the consistency of battery replacement in a vehicle, comprising the following steps: fully charging the replaced battery; comparing battery information; and matching judgment. A system for detecting the consistency of battery replacement in a vehicle, comprising a controller, a generator connected to the replaced battery, a generator regulator connected to the generator to control the output voltage of the generator, and a battery sensor for detecting the information of the replaced battery, the battery sensor being connected to the input end of the controller, and the generator regulator being connected to the output end of the controller. The present invention can detect and judge whether the battery matches the vehicle after replacement.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle batteries and relates to a method and system for detecting consistency of vehicle replacement batteries. Background Art

[0002] The battery is an essential part of the car. It mainly provides power when the vehicle is started and can provide power for the equipment on the vehicle. The rated voltage of the battery is generally 12.8V. The battery also needs to be charged when in use. Currently, the vehicle is equipped with a generator that consumes fuel to charge the battery. When controlling the charging of the generator, it is necessary to understand the status of the battery. Currently, battery sensors are used to obtain information such as the battery voltage and SOC (remaining power).

[0003] Since batteries are consumable items with a warranty period of 1 to 3 years or 20,000 to 30,000 kilometers, they will break down after long-term use and become difficult to use, so they need to be replaced. Since manual replacement of batteries is troublesome and prone to errors, people have designed a solution for automatic battery replacement, such as a Chinese patent application CN201810014674.5, which discloses a method and device for quickly replacing batteries in electric vehicles. When a car enters the battery replacement area, the manipulator removes the power-feeding battery in the car and puts it into an empty battery slot. When the full-capacity battery in the battery slot reaches the position of the battery replacement port, it stops. The lifting platform under the battery slot lifts the full-capacity battery to the battery replacement port, and the manipulator installs the full-capacity battery into the car to complete the battery replacement.

[0004] Although the above patent document can automatically and quickly replace the battery, it does not involve whether the battery can be used with the vehicle after the battery is replaced. Since the OCV-SOC curve (charge and discharge voltage curve) corresponding to each battery is different, the battery sensor will be configured according to the battery usage of the vehicle before the final assembly, that is, the OCV-SOC curve is obtained based on the usage of the battery installed by the original factory and preset in the battery sensor.

[0005] The battery sensor needs to calculate the SOC value of the battery based on the detected battery voltage and the preset OCV-SOC curve. If the replaced battery is not the battery model specified by the original manufacturer, although the capacity of the replaced battery is the same as the battery capacity specified by the original manufacturer (the replaced battery can be fixedly installed in the original vehicle battery installation position, provided that the battery capacity is the same as the battery capacity specified by the original manufacturer, otherwise its size specifications cannot be fixedly installed in the vehicle, that is, the replaced battery with different capacity cannot be installed in the original vehicle), but due to the different models, the replaced battery does not match the original OCV-SOC curve, so the calculated SOC value is inaccurate, which will affect the accuracy of the generator charging the battery. When the calculated SOC value is larger than the actual value, the generator will not charge the battery, but the actual battery power is already small and is still discharging to the outside, so that the replaced battery is in a state of power loss, which has a great impact on low-temperature starting and battery life. In other words, after the vehicle replaces the battery, the battery does not match and is inconsistent with the vehicle, which easily leads to difficulties in normal operation. The prior art does not have a method for detecting whether the battery matches the vehicle after replacement, so the car owner has no way of knowing whether the currently replaced battery matches the vehicle. When the replaced battery does not match the vehicle, the unmatched battery will easily be in a low-power state for a long time, causing the replaced battery to be damaged quickly, causing the car owner to frequently replace the battery. Summary of the invention

[0006] In view of the above problems existing in the prior art, the present invention proposes a method and system for detecting the consistency of battery replacement in a vehicle. The method and system for detecting the consistency of battery replacement in a vehicle solve the technical problem of how to detect whether the battery matches the vehicle after replacement.

[0007] The present invention is implemented by the following technical scheme: a method for detecting consistency of battery replacement in a vehicle, the method comprising the following steps:

[0008] Fully charge the replaced battery: After replacing the battery, the controller controls the generator to charge the battery. The controller determines whether the battery is fully charged based on the charging current;

[0009] Comparing battery information: After the battery is fully charged, the remaining power of the battery is obtained according to the battery discharge amount. At least under one remaining power of the battery, the controller obtains the parameter information of the battery through the battery sensor and compares it with the pre-stored battery parameter reference value under the corresponding remaining power;

[0010] Matching judgment: When the controller determines that the difference between the acquired battery parameter information and the corresponding battery parameter reference value is within the error range, the controller determines that the battery matches the vehicle; otherwise, the battery does not match the vehicle.

[0011] The method for detecting consistency of battery replacement in a vehicle is to charge the replaced battery to make it fully charged after the battery is replaced, and then determine the current power state of the battery, so as to avoid the problem of inaccurate detection caused by directly detecting and calculating the battery power by the battery sensor when the battery is not matched, and affecting the subsequent matching judgment. Since the battery is replaced but the capacity of the battery after replacement is unchanged, the full power of the battery is unchanged, and then the remaining power of the battery is obtained according to the amount of discharge, and at least one remaining power of the battery is selected as the information collection point. At the information collection point, the controller can obtain the parameter information of the current battery through the battery sensor, and compare it with the battery information stored at the current information collection point. The battery parameter reference value is the optimal parameter value of the battery matching the vehicle. If the difference with the battery parameter reference value is within the error range, it indicates that the battery can match the vehicle, the battery can be applied to the original OCV-SOC curve, and the remaining power of the battery obtained is also accurate. On the contrary, if the battery does not match the vehicle, the battery sensor cannot accurately obtain the accurate remaining power of the battery. The method for detecting consistency of battery replacement in a vehicle can accurately determine whether the replaced battery matches the vehicle through the above process, thereby making it easy for the owner to understand whether the currently replaced battery matches the vehicle, and further helping the owner to decide whether to replace the battery with a matching one or maintain the current battery operation.

[0012] In the above-mentioned vehicle replacement battery consistency detection method, the battery sensor sends the information that the battery has been replaced to the controller after powering on again, and the controller determines that the battery has been replaced. When replacing the battery, the battery sensor is powered off after the old battery is removed. After the replacement battery is installed, the battery sensor is powered on again to enter self-learning and determine that the current battery has been replaced, and sends the replacement information to the controller.

[0013] In the above-mentioned vehicle replacement battery consistency detection method, during the above-mentioned process of fully charging the replaced battery, the battery sensor obtains the charging current of the battery and sends it to the controller. The controller determines that the battery is fully charged when the charging current is lower than the current threshold for a certain period of time. When the battery is charged, the charging current will drop to a lower level after it is fully charged. It is more accurate to determine whether the battery is fully charged based on the size of the charging current, and the battery is fully charged only when it is lower than the current threshold for a certain period of time, so that it can accurately determine whether the battery is fully charged.

[0014] In the above-mentioned vehicle replacement battery consistency detection method, during the above-mentioned battery information comparison process, the controller controls the generator to output a voltage lower than the rated voltage of the battery to discharge the battery. The generator outputs a voltage lower than the rated voltage of the battery, so that the battery voltage is higher than the voltage of the generator and then discharges to the outside (electrical equipment in the vehicle), consuming electricity.

[0015] In the above-mentioned vehicle replacement battery consistency detection method, in the above-mentioned battery information comparison process, the battery discharge amount is obtained by integrating the discharge current and time, and the battery remaining power is obtained by the discharge amount and the battery capacity. The above-mentioned operation avoids the inaccuracy of the battery remaining power calculated by the battery sensor of the battery mismatch vehicle. The battery discharge amount can be accurately obtained by integrating the discharge current and time, and then the current battery remaining power can be accurately obtained.

[0016] In the above-mentioned method for detecting consistency of replacement batteries in a vehicle, in the above-mentioned process of comparing battery information, the battery parameter information includes the internal resistance of the battery or the voltage of the battery or the internal resistance and voltage of the battery, and the preset battery parameter reference value corresponds to the battery parameter information item. The internal resistance and voltage of the battery can reflect the model of the battery. By comparing the above information, it is determined whether the replaced battery is the same model as the battery installed by the original factory, and then it can be determined whether the battery matches the vehicle. If the replaced battery is of the same model as the battery installed by the original factory, then the original OCV-SOC curve can be applied, that is, the replacement battery of the vehicle is consistent.

[0017] In the above-mentioned method for detecting the consistency of replacing a battery in a vehicle, in the above-mentioned matching judgment, the controller judges the difference between the parameter information of the battery and the corresponding battery parameter reference value under four remaining powers in order from large to small, and judges that the battery matches the vehicle when the difference between the parameter information of the battery obtained at the four remaining powers of the battery and the corresponding battery parameter reference value is within the error range. When it is judged that the difference between the parameter information of the battery under the current remaining power and the corresponding battery parameter reference value is outside the error range, it is judged that the battery does not match the vehicle, and the parameter information of the battery under the next remaining power is no longer obtained for comparison. The four remaining powers are different in size and the parameter information is obtained from the large remaining power to the small remaining power. By selecting four remaining powers as four information collection points, the accuracy of the matching judgment can be improved and misjudgment can be avoided. When the above operation meets the requirement of being within the error range in all four judgments, it is judged that the battery matches the vehicle to ensure that the battery is really consistent with the vehicle and meets the normal use of the vehicle. The remaining power gradually decreases, and four judgments are performed in sequence. In the current judgment, the difference between the battery parameter information and the corresponding battery parameter reference value is outside the error range and is judged to be mismatched. After that, no further judgment on whether it matches is made. A single mismatch can indicate that the replaced battery does not match the vehicle. The above operations save comparison and judgment time.

[0018] In the above-mentioned vehicle replacement battery consistency detection method, when the controller determines that the battery does not match the vehicle, it outputs an alarm signal to the instrument for an alarm prompt, and the controller controls the generator to constantly output a charging voltage greater than the rated voltage of the battery to charge the battery. When the battery does not match the vehicle, the controller controls the instrument to issue an alarm to remind the owner to replace the battery with the original factory-specified model, and after the reminder, in order to avoid the battery from running low, the generator keeps charging the battery so that the battery has enough power to ensure that the vehicle can start normally next time.

[0019] A system for detecting consistency of replacement batteries in a vehicle comprises a controller, a generator connected to a replaced battery, a generator regulator connected to the generator to control the output voltage of the generator, and a battery sensor connected to the replaced battery and detecting information of the replaced battery. The system is characterized in that the battery sensor is connected to the input end of the controller, and the generator regulator is connected to the output end of the controller. The controller can output a control signal to the generator regulator to control the generator to charge the battery after the battery is replaced, and after judging that the battery is full according to the charging current detected by the battery sensor, the controller calculates the discharge amount of the battery by itself or obtains the discharge amount of the battery through the battery sensor, and obtains the remaining power of the battery according to the discharge amount of the battery. The controller obtains the parameter information of the battery through the battery sensor at least under one remaining power of the battery, and compares it with the pre-stored battery parameter reference value under the corresponding remaining power, and judges that the battery matches the vehicle when the absolute value of the difference between the obtained battery parameter information and the corresponding battery parameter reference value is within the error range.

[0020] The system for detecting consistency of replacement batteries of vehicles first charges the replaced batteries to make them fully charged after the replacement of the batteries, and then determines the current power state of the batteries, so as to avoid the problem that the detection is inaccurate and affects the subsequent matching judgment caused by the battery sensor directly detecting and calculating the battery power when the batteries are not matched, and then discharges the batteries. Since the capacity of the batteries remains unchanged after the replacement, the full power of the batteries remains unchanged, and then the remaining power of the batteries is obtained according to the amount of discharge, and at least one remaining power of the batteries is selected as the information collection point. At the information collection point, the controller can obtain the parameter information of the current batteries through the battery sensors, and compare it with the battery information stored at the current information collection point. The battery parameter reference value is the optimal parameter value of the battery matching the vehicle. If the difference with the battery parameter reference value is within the error range, it indicates that the battery can match the vehicle, the battery can apply the original OCV-SOC curve, and the remaining power of the obtained batteries is also accurate. On the contrary, if the batteries do not match the vehicle, the battery sensors cannot accurately obtain the accurate remaining power of the batteries. The vehicle replacement battery consistency detection system can accurately determine whether the replaced battery matches the vehicle, so that the owner can understand whether the current replacement battery matches the vehicle, and then help the owner decide whether to replace the matching battery or maintain the current battery operation.

[0021] In the above vehicle replacement battery consistency detection system, the controller is connected to the vehicle's instrument processor. When the battery does not match the vehicle, the controller sends a control signal to the instrument processor, and the instrument processor controls the instrument to issue an alarm to remind the owner to replace the battery with the original factory specified model.

[0022] Compared with the prior art, the vehicle replacement battery consistency detection system has the following advantages:

[0023] 1. The present invention can accurately find the different remaining power of the replaced battery, and compare the accurate remaining power with the preset corresponding remaining power information to determine whether the replaced battery matches the vehicle, so that the owner can understand whether the currently replaced battery matches the vehicle, and then help the owner decide whether to replace the matching battery or keep the current battery operation.

[0024] 2. The present invention uses a method of multiple information comparisons to ensure that the battery is truly consistent with the vehicle and meets the normal use of the vehicle, and can alarm when there is a mismatch. At the same time, the battery is constantly charged until the battery is replaced again to ensure that when the current battery does not match, the battery will not be depleted and the vehicle will be difficult to start. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the main process of the method of the present invention.

[0026] Figure 2 It is a schematic diagram of the system connection structure of the present invention.

[0027] In the figure, 1, controller; 2, generator; 3, generator regulator; 4, battery sensor; 5, instrument processor. DETAILED DESCRIPTION

[0028] The following are specific embodiments of the present invention, which are combined with the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0029] like Figure 1 and Figure 2 As shown, a method for detecting consistency of battery replacement in a vehicle comprises the following steps:

[0030] Fully charge the replaced battery: After replacing the battery, the controller 1 controls the generator 2 to charge the battery, and the controller 1 determines whether the battery is fully charged based on the charging current. After replacing the battery, the replaced battery is first charged to fully charge the battery, and then the current power state of the battery can be determined, avoiding the problem of inaccurate detection caused by the battery sensor 4 directly detecting and calculating the battery power when the battery is not matched, and affecting the subsequent matching judgment.

[0031] In this embodiment, the battery sensor 4 sends information that the battery has been replaced to the controller 1 after the power is turned on again, and the controller 1 determines that the battery has been replaced. When replacing the battery, the battery sensor 4 is powered off after the old battery is removed. After the replacement battery is installed, the battery sensor 4 is powered on again to enter self-learning and determine that the current battery has been replaced, and the replacement information is sent to the controller 1. The batteries referred to below are all replaced batteries. As another solution, after the controller 1 is powered on again, it is determined that the battery has been replaced. There is another solution that a battery replacement button is set on the instrument, and information is sent to the controller 1 by pressing the battery button, and the controller 1 determines that the battery has been replaced.

[0032] During the process of fully charging the replaced battery, the controller 1 controls the generator 2 to constantly output a charging voltage greater than the rated voltage of the battery to charge the battery. By making the generator 2 constantly output a charging voltage greater than the rated voltage of the battery, the charging process of the battery can be more stable, while ensuring that the battery can be charged. The constant charging voltage ranges from 13 to 15V, preferably 14V.

[0033] When judging whether the battery is full, the battery sensor 4 is used in this embodiment to obtain the charging current of the battery and send it to the controller 1. The controller 1 determines that the battery is full when the charging current is lower than the current threshold for a certain period of time. After the battery is full, the charging current will drop to a lower level. It is more accurate to judge whether the battery is full based on the size of the charging current. The battery is full only when it is lower than the current threshold for a certain period of time, so that it can accurately judge whether the battery is full. The continuous certain time range is 1 second to 2 hours, and preferably the continuous certain time is 1 hour. The current threshold range is 0.5A to 2A, and the preferred current threshold is 1A. As another solution, the battery is judged to be full when the charging current of the battery is zero.

[0034] Compare battery information: After the battery is fully charged, the remaining power of the battery is obtained according to the battery discharge amount. At least under one remaining power of the battery, the controller 1 obtains the parameter information of the battery through the battery sensor 4, and compares it with the pre-stored battery parameter reference value under the corresponding remaining power. Controller 1 controls the generator 2 to output a voltage lower than the rated voltage of the battery to discharge the battery. The generator 2 outputs a voltage lower than the rated voltage of the battery, so that the voltage of the battery is higher than the voltage of the generator 2 and then discharges to the outside (electrical equipment in the vehicle), consuming electricity. Preferably, the voltage range of the generator 2 output lower than the rated voltage of the battery is 0V to 12V, and preferably 11V.

[0035] The battery discharge amount is obtained by integrating the discharge current and time, and the battery remaining capacity is obtained by the discharge amount and the battery capacity. The battery discharge amount is to calculate the battery capacity ΔSOC for a certain period of time. The specific formula is ΔSOC=∫Idt, where I is the discharge current and t is the time. Since the capacity of the replaced battery is the same as that of the original battery, the remaining capacity is obtained by subtracting the battery discharge amount from the preset original battery capacity. If the remaining capacity is expressed as a percentage, the battery capacity is subtracted from the battery discharge amount and then divided by the original battery capacity to obtain the remaining capacity of the battery. If the original battery capacity is 60Ah and the discharge amount is 6Ah, the current remaining capacity of the battery is 90% of the battery capacity. The above operation avoids the inaccuracy of the battery remaining capacity calculated by the battery sensor 4 when the battery does not match the vehicle. The battery discharge amount can be accurately obtained by integrating the discharge current and time, and then the current remaining capacity of the battery can be accurately obtained.

[0036] In this embodiment, the battery sensor 4 is used to obtain the battery parameter information and compare the battery parameters at four remaining power levels. The four remaining power levels are preferably 100% of the battery capacity, 90% of the battery capacity, 80% of the battery capacity and 70% of the battery capacity.

[0037] The parameter information of the battery includes the internal resistance of the battery or the voltage of the battery or the internal resistance and voltage of the battery, and the preset battery parameter reference value corresponds to the parameter information item of the battery. In this embodiment, the parameter information of the battery includes the internal resistance and voltage of the battery, and the preset battery parameter reference value also includes the internal resistance and voltage of the battery, and a one-to-one correspondence is performed.

[0038] Matching judgment: When the controller 1 judges that the difference between the acquired battery parameter information and the corresponding battery parameter reference value is within the error range, the battery is judged to match the vehicle; otherwise, the battery is not matched with the vehicle.

[0039] The controller 1 determines the difference between the battery parameter information and the corresponding battery parameter reference value at four remaining power levels in order from large to small. When the difference between the battery parameter information obtained at the four remaining power levels and the corresponding battery parameter reference value is within the error range, the battery is determined to match the vehicle. When the difference between the battery parameter information and the corresponding battery parameter reference value at the current remaining power level is determined to be outside the error range, the battery is determined to not match the vehicle, and the battery parameter information at the next remaining power level is no longer obtained for comparison.

[0040] Specifically, when the remaining power of the battery after being fully charged is 100% of the battery capacity, that is, when the discharge amount is 0, the internal resistance and voltage of the current battery are collected, and the difference is calculated by corresponding comparison with the internal resistance and voltage of the battery at 100% of the preset battery capacity. When the difference between the two sets of comparisons is within the error range, it is judged that the current battery information matches and the next remaining power comparison is entered. Otherwise, it is directly judged that it does not match and the next remaining power information acquisition and comparison is not entered. The preferred error range size is 10% of the preset battery parameter reference value. If the currently acquired internal resistance is 9Ω and the pre-stored internal resistance is 10Ω, the difference between the two is 1Ω, which is within 10% of the pre-stored internal resistance, so the acquired internal resistance is within the error range. If the currently acquired voltage is 9V and the pre-stored internal resistance is 10V, the difference between the two is 1V, which is 10% of the pre-stored voltage, so the acquired voltage is within the error range. If both the voltage and the internal resistance are within the error range, it is determined that the current battery information matches, otherwise it is determined that the current battery information does not match. As a preferred method, after calculating the difference, it is determined whether its absolute value is within the error range.

[0041] When the difference between the internal resistance and voltage of the battery obtained at 100% of the battery capacity and the corresponding battery parameter reference value is within the error range, the output voltage of the generator 2 is controlled to be 11V, so that the battery starts to discharge. When the discharge amount is calculated and the current remaining battery power is 90% of the battery capacity, the same judgment is performed, that is, the obtained internal resistance and voltage of the battery are compared with the internal resistance and voltage of the battery at 90% of the preset battery capacity to obtain the difference. When the difference between the obtained battery parameter information and the corresponding battery parameter reference value is within the error range, the next remaining power judgment is entered. If it is not within the error range, it is determined that the battery and the vehicle do not match, and the next remaining power information acquisition and comparison will not be entered.

[0042] After the difference between the internal resistance and voltage of the battery obtained at 90% of the battery capacity and the corresponding battery parameter reference value is within the error range, when the discharge amount is calculated to obtain the current remaining battery capacity of 80% of the battery capacity, the internal resistance and voltage of the battery obtained are compared with the internal resistance and voltage of the battery at a preset battery capacity of 80% to obtain the difference. When the difference between the obtained battery parameter information and the corresponding battery parameter reference value is within the error range, the next remaining power judgment is entered. If it is not within the error range, it is determined that the battery does not match the vehicle, and the next remaining power information acquisition and comparison will not be entered.

[0043] After the difference between the internal resistance and voltage of the battery obtained at 80% of the battery capacity and the corresponding battery parameter reference value is within the error range, when the discharge amount is calculated to obtain the current remaining battery capacity of 70% of the battery capacity, the internal resistance and voltage of the battery obtained are compared with the internal resistance and voltage of the battery at a preset battery capacity of 70% to obtain the difference; when the difference between the obtained battery parameter information and the corresponding battery parameter reference value are both within the error range, it is determined that the battery matches the vehicle; otherwise, it is determined that the battery does not match the vehicle.

[0044] The four remaining powers are different in size and the parameter information is obtained from the large remaining power to the small remaining power. By selecting the four remaining powers as the four information collection points, the accuracy of the matching judgment can be improved and misjudgment can be avoided. When the above operation meets the requirements within the error range in the four judgments, it is judged that the battery matches the vehicle to ensure that the battery is really consistent with the vehicle and meets the normal use of the vehicle. The remaining power gradually decreases, and the four judgments are also performed in sequence. In the current judgment, the difference between the parameter information of the battery and the corresponding reference value of the battery parameter is judged to be mismatched outside the error range, and then no judgment on whether it matches is made. A single judgment that it does not match can indicate that the replaced battery does not match the vehicle, and the above operation saves comparison and judgment time. As another solution, the battery information is compared and the battery matching judgment is made under three remaining powers of the battery, or the battery information is compared and the battery matching judgment is made under 5 remaining powers of the battery.

[0045] The battery parameter reference value is the optimal parameter value of the battery that matches the vehicle. If the difference with the battery parameter reference value is within the error range, it indicates that the battery can match the vehicle, the battery can be applied to the original OCV-SOC curve, and the remaining power of the battery obtained is also accurate. On the contrary, if the battery does not match the vehicle, the battery sensor 4 cannot accurately obtain the accurate remaining power of the battery. As the preferred battery parameter reference value, the corresponding data is obtained according to the usage information of the battery originally set in the vehicle. Since the battery of the vehicle set by the original factory is definitely matched with the vehicle, when it is within a certain error range after comparison with the preset parameter reference value, it indicates that the replaced battery is consistent with the battery of the vehicle set by the original factory in model. It is just that it is difficult to ensure that each battery has exactly the same performance during production, and some differences are inevitable. Within a certain error range, it indicates that the replaced battery can be used normally on the vehicle, that is, the replaced battery is also matched with the vehicle.

[0046] After determining that the replaced battery matches the vehicle, the battery works normally, the battery sensor 4 also detects and sends information normally, and the generator 2 also controls the charging and discharging of the battery according to the power and voltage information fed back by the battery sensor 4. That is to say, after the replaced battery matches the vehicle, the replaced battery works the same as the original battery originally set.

[0047] When it is determined that the battery does not match the vehicle, an alarm signal is output to the instrument for an alarm prompt, and the controller 1 controls the generator 2 to constantly output a charging voltage greater than the rated voltage of the battery to charge the battery. When the battery does not match the vehicle, the controller 1 controls the instrument to issue an alarm to remind the owner to replace the battery with the original model specified by the manufacturer, and after the reminder, in order to avoid the battery from running low, the generator 2 keeps charging the battery so that the battery has enough power to ensure that the vehicle can start normally next time, and the charging voltage is a constant 14V. Through the above operation, the vehicle can be started without replacing the battery, and the owner can be given more time to replace the specified battery. The battery information comparison and matching judgment is completed by the controller 1.

[0048] like Figure 2As shown, a system for detecting the consistency of replacement batteries in a vehicle is applied with the above method. The system includes a controller 1, a generator 2 for connecting to a replaced battery, a generator regulator 3 connected to the generator 2 for controlling the output voltage of the generator 2, and a battery sensor 4 for connecting to the replaced battery and detecting information of the replaced battery. The battery sensor 4 is connected to the input end of the controller 1, and the generator regulator 3 is connected to the output end of the controller 1. The controller 1 preferably adopts the engine controller (EMS) provided on the vehicle, and the generator 2 preferably adopts the intelligent generator. The generator regulator 3 can control the output charging voltage of the generator 2 as its own function. The battery sensor 4 can detect information of the battery including internal resistance, voltage, charging current, discharging current, etc. as its own function.

[0049] The controller 1 determines that the battery has been replaced according to the battery replacement signal sent by the battery sensor 4, and outputs a control signal to the generator regulator 3 to control the generator 2 to constantly output a voltage greater than the rated voltage of the battery to charge the battery, and the voltage is preferably 14V. During the charging process, the controller 1 makes a judgment based on the charging current detected by the battery sensor 4. The controller 1 determines that the battery is full when the charging current is lower than the current threshold for a certain period of time. Preferably, the continuous certain period is 1 hour, the current threshold ranges from 0.5A to 2A, and the current threshold is preferably 1A. After being fully charged, the controller 1 sends a control signal to the generator regulator 3 to reduce the output voltage of the generator 2 to discharge the battery. At this time, the output voltage of the generator 2 is 11V. The controller 1 calculates the discharge amount of the battery, or obtains the discharge amount of the battery through the battery sensor 4 (the battery sensor 4 calculates the discharge amount of the battery and sends it to the controller 1). The discharge amount of the battery is obtained by integrating the discharge current and time, and the remaining battery capacity is obtained by the discharge amount and the battery capacity. The battery discharge capacity is calculated by calculating the battery capacity ΔSOC for a certain period of time. The specific formula is ΔSOC = ∫Idt, where I is the discharge current and t is the time. Since the capacity of the replaced battery is the same as the original battery, the remaining capacity is obtained by subtracting the battery discharge capacity from the preset original battery capacity. If the remaining capacity is expressed as a percentage, the remaining capacity of the battery is obtained by subtracting the battery discharge capacity from the original battery capacity and then dividing it by the original battery capacity.

[0050] The controller 1 obtains the parameter information of the battery through the battery sensor 4 at least under one remaining power of the battery, and compares it with the pre-stored battery parameter reference value under the corresponding remaining power, and determines that the battery matches the vehicle when the absolute value of the difference between the obtained battery parameter information and the corresponding battery parameter reference value is within the error range. The controller 1 determines the difference between the battery parameter information and the corresponding battery parameter reference value under four remaining power levels in order from large to small, and determines that the battery matches the vehicle when the difference between the battery parameter information obtained under the four remaining power levels and the corresponding battery parameter reference value is within the error range. When it is determined that the difference between the battery parameter information and the corresponding battery parameter reference value under the current remaining power level is outside the error range, it is determined that the battery does not match the vehicle, and the battery parameter information under the next remaining power level is no longer obtained for comparison. The parameter information of the battery includes the internal resistance and voltage of the battery.

[0051] The controller 1 is connected to the vehicle's instrument processor 5. When the battery does not match the vehicle, the controller 1 sends a control signal to the instrument processor 5, and the instrument processor 5 controls the instrument to issue an alarm to remind the owner to replace the battery with the original model specified by the manufacturer. The controller 1 controls the generator 2 to constantly output a charging voltage greater than the rated voltage of the battery to charge the battery.

[0052] The present invention can accurately determine whether a replaced battery matches the vehicle and issue a reminder, and can keep the battery charged when the battery is not replaced again, thereby making it convenient for the owner to understand whether the currently replaced battery matches the vehicle and remind the owner to replace the battery with a matching one, while ensuring that the vehicle can be started normally when the battery is not replaced again.

[0053] The specific embodiments described herein are merely examples of the present invention. A person skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0054] Although the term controller 1, generator 2, generator regulator 3, battery sensor 4, instrument processor 5, etc. are frequently used in this document, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A method for detecting consistency of battery replacement in a vehicle, the method comprising the following steps: Fully charging the replaced battery: after the battery is replaced, the controller (1) controls the generator (2) to charge the battery, and the controller (1) determines whether the battery is fully charged based on the charging current; Comparing battery information: the capacity of the battery after replacement is the same as the capacity of the battery before replacement, and after the battery is fully charged, the remaining power of the battery is obtained according to the discharge amount of the battery, and at least under one remaining power of the battery, the controller (1) obtains the parameter information of the battery through the battery sensor (4), and compares it with the pre-stored battery parameter reference value under the corresponding remaining power; Matching judgment: When the controller (1) judges that the difference between the acquired battery parameter information and the corresponding battery parameter reference value is within the error range, it is judged that the battery matches the vehicle; otherwise, the battery does not match the vehicle.

2. The method for detecting consistency of vehicle replacement batteries according to claim 1, characterized in that: After the battery is powered on again, the battery sensor (4) sends information that the battery has been replaced to the controller (1), and the controller (1) determines that the battery has been replaced.

3. The method for detecting consistency of battery replacement in a vehicle according to claim 2, characterized in that: During the process of fully charging the replaced battery, the battery sensor (4) obtains the charging current of the battery and sends it to the controller (1). The controller (1) determines that the battery is fully charged when the charging current is lower than the current threshold for a certain period of time.

4. The method for detecting consistency of vehicle replacement batteries according to claim 1, characterized in that: In the process of comparing the battery information, the controller (1) controls the generator (2) to output a voltage lower than the rated voltage of the battery, so that the battery is discharged.

5. The method for detecting consistency of battery replacement in a vehicle according to claim 4, characterized in that: In the above-mentioned process of comparing battery information, the battery discharge amount is obtained by integrating the discharge current and time, and the battery remaining power is obtained by the discharge amount and the battery capacity.

6. The method for detecting consistency of battery replacement in a vehicle according to claim 5, characterized in that: In the above-mentioned battery information comparison process, the battery parameter information includes the battery internal resistance or the battery voltage or the battery internal resistance and voltage, and the preset battery parameter reference value corresponds to the battery parameter information item.

7. The method for detecting consistency of battery replacement in a vehicle according to claim 1, characterized in that: In the above matching judgment, the controller (1) judges the difference between the battery parameter information and the corresponding battery parameter reference value at four remaining power levels in order from large to small, and judges that the battery matches the vehicle when the difference between the battery parameter information obtained at the four remaining power levels and the corresponding battery parameter reference value is within the error range; and judges that the battery does not match the vehicle when the difference between the battery parameter information and the corresponding battery parameter reference value at the current remaining power level is outside the error range, and no longer obtains the battery parameter information at the next remaining power level for comparison.

8. The method for detecting consistency of battery replacement in a vehicle according to claim 1, characterized in that: When the controller (1) determines that the battery does not match the vehicle, it outputs an alarm signal to the instrument to give an alarm prompt, and the controller (1) controls the generator (2) to constantly output a charging voltage greater than the rated voltage of the battery to charge the battery.

9. A system for detecting consistency of a replacement battery of a vehicle, comprising a controller (1), a generator (2) for connecting to a replaced battery, a generator regulator (3) connected to the generator (2) and controlling the output voltage of the generator (2), and a battery sensor (4) for connecting to the replaced battery and detecting information of the replaced battery, characterized in that: The battery sensor (4) is connected to the input end of the controller (1), and the generator regulator (3) is connected to the output end of the controller (1). After the battery is replaced, the controller (1) can output a control signal to the generator regulator (3) to control the generator (2) to charge the battery. After judging that the battery is fully charged based on the charging current detected by the battery sensor (4), the controller (1) calculates the discharge amount of the battery or obtains the discharge amount of the battery through the battery sensor (4). The capacity of the replaced battery is the same as the capacity of the battery before replacement. The remaining capacity of the battery is obtained based on the discharge amount of the battery. The controller (1) obtains the parameter information of the battery through the battery sensor (4) at least under one remaining capacity of the battery, and compares it with the pre-stored battery parameter reference value under the corresponding remaining capacity. When it is judged that the absolute value of the difference between the obtained battery parameter information and the corresponding battery parameter reference value is within the error range, it is judged that the battery matches the vehicle.

10. The vehicle replacement battery consistency detection system according to claim 9, characterized in that: The controller (1) is connected to an instrument processor (5) of the vehicle.

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