Capacity detection equipment, capacity value detection method, vehicle detection device and medium

Abstract

The present invention discloses a capacity detection device, a capacity value detection method, a vehicle detection device and a medium. The method includes: when the capacity detection device detects a connected vehicle, the connected vehicle is judged to obtain the vehicle type of the connected vehicle, a capacity estimation model corresponding to the vehicle type is extracted in the capacity detection device, and the parameters to be calculated of the connected vehicle are detected by the capacity estimation model to obtain the capacity value of the power battery of the connected vehicle, so that the user can obtain the capacity size and quality of the power battery in a short time, while avoiding the tediousness of the full discharge and full charge detection mode, reducing the time, energy and money of the detection to a certain extent, that is, improving the detection efficiency, and reducing the volume and cost of the detection equipment, which is convenient for practical application and promotion.

Description

Technical Field

[0001] The present invention relates to the technical field of power batteries, and in particular to a capacity detection device, a capacity value detection method, a vehicle detection apparatus, and a computer-readable storage medium. Background Art

[0002] As the primary energy storage device for electric vehicles, the capacity and quality of power batteries determine the quality of the vehicle's powertrain. Generally speaking, power batteries continuously age during charging and discharging, with the rate of degradation varying with ambient temperature and mileage. Accurately and quickly measuring a battery's maximum available capacity during actual use is currently a key and challenging area in power battery testing.

[0003] In existing technology, power battery capacity testing generally uses an offline full-discharge and full-charge test. That is, the power battery is discharged to a SOC (State of Charge) of 0, then fully charged, and the power battery capacity is determined based on the amount of electricity remaining during the charging process. This method requires the user to send the vehicle to a repair center, which consumes a lot of time, energy, and money. It also requires additional charging and discharging equipment for capacity testing during the repair. In addition, to improve the accuracy of the test results, the battery pack in the power battery must sometimes be disassembled, significantly reducing the efficiency of power battery capacity testing and increasing the cost of testing. Summary of the Invention

[0004] The main purpose of the present invention is to provide a capacity detection device, a capacity value detection method, a vehicle detection device and a computer-readable storage medium, aiming to solve the technical problems of low detection efficiency and high detection cost when the existing power battery capacity detection adopts offline full discharge and full charge detection.

[0005] To achieve the above-mentioned purpose, the present invention provides a capacity detection device, which includes: a capacity calculation module, a central controller and a charge and discharge control module;

[0006] The capacity calculation module is connected to the central controller, the capacity calculation module establishes a communication connection with the vehicle controller of the connected vehicle, the central controller is connected to the charge and discharge control module, and the charge and discharge control module establishes a communication connection with the battery pack of the connected vehicle;

[0007] The central controller collects the charge and discharge parameters of the connected vehicle through the charge and discharge control module, and sends the charge and discharge parameters to the capacity calculation module;

[0008] The capacity calculation module collects the power battery parameters of the connected vehicle through a communication connection, and performs capacity detection of the power battery of the connected vehicle based on the power battery parameters and the charge and discharge parameters.

[0009] Optionally, the capacity detection device further includes: a memory, a bidirectional DC / DC, a direct plug charging port and a national standard fast charging interface;

[0010] The memory is connected to the central controller;

[0011] The direct plug-in charging port and the national standard fast charging interface are placed on the capacity detection device, the bidirectional DC / DC is connected to the direct plug-in charging port and the national standard fast charging interface respectively, and the bidirectional DC / DC is connected to the charge and discharge control module.

[0012] The present invention also provides a capacity value detection method, which includes the following steps:

[0013] When the capacity detection device detects an access vehicle, after determining the access vehicle to obtain the vehicle type, the capacity estimation model corresponding to the vehicle type is extracted from the capacity detection device;

[0014] The capacity estimation model is used to detect the parameters to be calculated of the connected vehicle to obtain the capacity value of the power battery of the connected vehicle.

[0015] Optionally, before the step of detecting an access vehicle based on the capacity detection device, the method further includes:

[0016] Acquiring historical vehicle operation data, and extracting attenuation features from the historical vehicle operation data;

[0017] Training is performed based on the attenuation characteristics to construct a capacity estimation model, and the capacity estimation model is sent to the capacity detection device for storage.

[0018] Optionally, when the capacity detection device detects an incoming vehicle, after determining the incoming vehicle to obtain the vehicle type, the step of extracting a capacity estimation model corresponding to the vehicle type in the capacity detection device includes:

[0019] When the central controller detects the access vehicle, it determines the vehicle type of the access vehicle and obtains the vehicle type corresponding to the access vehicle;

[0020] The central controller extracts a capacity estimation model corresponding to the vehicle type from the memory according to the vehicle type, and sends the capacity estimation model to the capacity calculation module.

[0021] Optionally, before the step of detecting the to-be-calculated parameters of the connected vehicle using the capacity estimation model, the method further includes:

[0022] The central controller collects the charge and discharge parameters of the connected vehicle in the charge and discharge control module via a communication connection, and sends the charge and discharge parameters to the capacity calculation module;

[0023] Loading the charge and discharge parameters into the capacity estimation model through the capacity calculation module; and,

[0024] The power battery parameters of the connected vehicle are collected through the capacity calculation module, and the power battery parameters are loaded into the capacity estimation model.

[0025] Optionally, the step of detecting the to-be-calculated parameters of the connected vehicle using the capacity estimation model includes:

[0026] The capacity estimation model is used to detect the loaded charge and discharge parameters and power battery parameters.

[0027] Optionally, after the step of obtaining the capacity value of the power battery of the connected vehicle, the method further includes:

[0028] The capacity value is displayed based on a display component in the capacity detection device, wherein the display component is provided on the capacity calculation module.

[0029] In addition, to achieve the above-mentioned purpose, the present invention also provides a vehicle detection device, including the capacity detection device as described above, a processor, and a computer processing program stored in a memory and runnable on the processor, and the processor implements the steps of the above-mentioned capacity value detection method when executing the computer processing program.

[0030] In addition, to achieve the above-mentioned purpose, the present invention also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the above-mentioned capacity value detection method are implemented.

[0031] The present invention provides users with a set of offline power battery capacity detection equipment under short-time charging conditions by building a capacity detection device. The central controller detects that the charge and discharge control module controls the charge and discharge status of the connected vehicle and determines that the user has a capacity value detection requirement for the power battery at this time. Therefore, the central controller collects the charge and discharge parameters of the battery pack of the connected vehicle through the charge and discharge control module, and sends the collected charge and discharge parameters to the capacity calculation module. At the same time, when the central controller determines that the user has a capacity value detection requirement for the power battery at this time, it will also notify the capacity calculation module of the requirement. At this time, the capacity calculation module will collect the power battery parameters of the connected vehicle through the CAN (Controller Area Network) bus, and perform capacity detection of the power battery of the connected vehicle based on the collected power battery parameters and the charge and discharge parameters sent by the central controller, so that the user can obtain the capacity and quality of the power battery in a short time, while avoiding the tediousness of the full charge and discharge detection mode, reducing the time, energy and money of detection to a certain extent, that is, improving the detection efficiency, and reducing the volume and cost of the detection equipment, which is convenient for practical application and promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the terminal structure of the hardware operating environment involved in the embodiment of the present invention;

[0033] Figure 2 It is a structural diagram of the capacity detection equipment;

[0034] Figure 3 This is a flow chart of an embodiment of a capacity value detection method of the present invention;

[0035] Figure 4 This is a schematic diagram of the connection between the capacity detection equipment and the access vehicle;

[0036] Figure 5 for Figure 3 Schematic diagram of the process before step S10.

[0037] Description of Figure Numbers:

[0038] Label name a Direct charging port b National standard fast charging interface c DC charging port d OBD interface

[0039] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0040] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0041] The main solution of the embodiment of the present invention is: by building a capacity detection device including a capacity calculation module, a central controller and a charge and discharge control module, the power battery connected to the vehicle is detected and the capacity value is estimated based on the capacity detection device.

[0042] Existing testing methods for power battery capacity typically employ an offline full-discharge and full-charge test mode. This involves discharging the power battery to a SOC of 0, then fully charging it, and determining the capacity based on the remaining charge. This method requires the user to send the vehicle to a repair center, which also requires the repair center to be equipped with additional charging and discharging equipment for capacity testing. Furthermore, to improve the accuracy of the test results, the battery pack may need to be disassembled, significantly reducing the efficiency of capacity testing and increasing testing costs.

[0043] The present invention provides a solution, in which a central controller detects that a charge and discharge control module controls the charge and discharge status of a connected vehicle, and determines that the user has a demand for detecting the capacity value of a power battery at this time. Therefore, the central controller collects the charge and discharge parameters of a battery pack connected to the vehicle through the charge and discharge control module, and sends the collected charge and discharge parameters to a capacity calculation module. At the same time, when the central controller determines that the user has a demand for detecting the capacity value of a power battery at this time, it will also notify the capacity calculation module of the demand. At this time, the capacity calculation module collects the power battery parameters of the connected vehicle through a CAN bus, and performs capacity detection of the power battery of the connected vehicle based on the collected power battery parameters and the charge and discharge parameters sent by the central controller, so that the user can obtain the capacity and quality of the power battery in a short time, thereby improving the detection efficiency and reducing the volume and cost of the detection equipment, which is convenient for practical application and promotion.

[0044] like Figure 1 As shown, Figure 1 It is a schematic diagram of the terminal structure of the hardware operating environment involved in the embodiment of the present invention.

[0045] The capacity value detection method of the embodiment of the present invention is applied to a vehicle detection device, such as Figure 1As shown, the vehicle detection device may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, and a communication bus 1002. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display area (Display), an input unit such as a keyboard (Keyboard), and the user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a WI-FI interface). The memory 1005 may be a high-speed RAM memory, or a stable memory (non-volatile memory), such as a disk memory. The memory 1005 may optionally be a storage device independent of the aforementioned processor 1001.

[0046] Optionally, the vehicle detection device may also include a camera, an RF (Radio Frequency) circuit, a sensor, an audio circuit, a WiFi module, and the like. Among them, sensors include light sensors, motion sensors, and other sensors. Specifically, the light sensor may include an ambient light sensor and a proximity sensor, wherein the ambient light sensor may adjust the brightness of the display screen according to the brightness of the ambient light, and the proximity sensor may turn off the display screen and / or backlight when the mobile terminal is moved to the ear. As a type of motion sensor, the gravity acceleration sensor can detect the magnitude of acceleration in all directions (generally three axes), and can detect the magnitude and direction of gravity when stationary. It can be used for applications that identify the posture of the mobile terminal (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, tapping), etc.; of course, the mobile terminal can also be equipped with other sensors such as gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., which will not be repeated here.

[0047] Those skilled in the art will understand that Figure 1 The structure of the vehicle detection device shown in the figure does not constitute a limitation on the vehicle detection device, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0048] like Figure 1 As shown, the memory 1005 as a computer storage medium may include an operating system, a network communication module, a user interface module, and a computer processing program.

[0049] exist Figure 1In the terminal shown, the network interface 1004 is mainly used to connect to the backend server and communicate data with the backend server; the user interface 1003 is mainly used to connect to the client (user end) and communicate data with the client; and the processor 1001 can be used to call the computer processing program stored in the memory 1005 and perform the following operations:

[0050] When the capacity detection device detects an access vehicle, after determining the access vehicle to obtain the vehicle type, the capacity estimation model corresponding to the vehicle type is extracted from the capacity detection device;

[0051] The capacity estimation model is used to detect the parameters to be calculated of the connected vehicle to obtain the capacity value of the power battery of the connected vehicle.

[0052] Furthermore, the processor 1001 may call a computer processing program stored in the memory 1005 and perform the following operations:

[0053] Before the step of detecting an access vehicle based on the capacity detection device, acquiring historical vehicle operation data and extracting attenuation features from the historical vehicle operation data;

[0054] Training is performed based on the attenuation characteristics to construct a capacity estimation model, and the capacity estimation model is sent to the capacity detection device for storage.

[0055] Furthermore, the processor 1001 may call a computer processing program stored in the memory 1005 and perform the following operations:

[0056] The step of extracting a capacity estimation model corresponding to the vehicle type in the capacity detection device after determining the vehicle type when the capacity detection device detects the vehicle connected includes: determining the vehicle type of the vehicle connected when the central controller detects the vehicle connected to obtain the vehicle type corresponding to the vehicle connected;

[0057] The central controller extracts a capacity estimation model corresponding to the vehicle type from the memory according to the vehicle type, and sends the capacity estimation model to the capacity calculation module.

[0058] Furthermore, the processor 1001 may call a computer processing program stored in the memory 1005 and perform the following operations:

[0059] Before the step of detecting the parameters to be calculated of the connected vehicle by the capacity estimation model, the central controller acquires the charge and discharge parameters of the connected vehicle in the charge and discharge control module via a communication connection, and sends the charge and discharge parameters to the capacity calculation module;

[0060] Loading the charge and discharge parameters into the capacity estimation model through the capacity calculation module; and,

[0061] The power battery parameters of the connected vehicle are collected through the capacity calculation module, and the power battery parameters are loaded into the capacity estimation model.

[0062] Furthermore, the processor 1001 may call a computer processing program stored in the memory 1005 and perform the following operations:

[0063] The parameters to be calculated include power battery parameters and charge and discharge parameters. The step of detecting the parameters to be calculated of the connected vehicle through the capacity estimation model includes: detecting the loaded charge and discharge parameters and power battery parameters through the capacity estimation model.

[0064] Furthermore, the processor 1001 may call a computer processing program stored in the memory 1005 and perform the following operations:

[0065] After the step of obtaining the capacity value of the power battery connected to the vehicle, the capacity value is displayed based on a display component in the capacity detection device, wherein the display component is provided on the capacity calculation module.

[0066] Reference Figure 2 , the present invention provides a capacity detection device, the capacity detection device includes: a capacity calculation module, a central controller and a charge and discharge control module;

[0067] The capacity calculation module is connected to the central controller, the capacity calculation module establishes a communication connection with the vehicle controller of the connected vehicle, the central controller is connected to the charge and discharge control module, and the charge and discharge control module establishes a communication connection with the battery pack of the connected vehicle;

[0068] The central controller collects the charge and discharge parameters of the connected vehicle through the charge and discharge control module, and sends the charge and discharge parameters to the capacity calculation module;

[0069] The capacity calculation module collects the power battery parameters of the connected vehicle through a communication connection, and performs capacity detection of the power battery of the connected vehicle based on the power battery parameters and the charge and discharge parameters.

[0070] Furthermore, the capacity detection device also includes: a memory, a bidirectional DC / DC (Direct Current Direct Current Converter), a direct plug charging port a and a national standard fast charging port b;

[0071] The memory is connected to the central controller;

[0072] The direct plug-in charging port a and the national standard fast charging interface b are placed on the capacity detection device, the bidirectional DC / DC is connected to the direct plug-in charging port a and the national standard fast charging interface b respectively, and the bidirectional DC / DC is connected to the charge and discharge control module.

[0073] Depend on Figure 2 From the architecture diagram of the capacity detection device shown and the above-mentioned connection and function descriptions, it can be seen that when the direct plug-in charging port a or one of the charging ports of the national standard fast charging interface b of the capacity detection device is connected to the charging port of the electric vehicle, it is determined that the capacity detection device is connected to the vehicle at this time. Because the charging port is connected to the bidirectional DC / DC, the bidirectional DC / DC is controlled by the charge and discharge control module to charge the battery pack in the power battery of the connected vehicle, and then the bidirectional DC / DC is controlled to discharge the battery pack, thereby realizing the charging and discharging of the battery pack in a short time.

[0074] In the process of the charge and discharge control module controlling the charging and discharging of the battery pack in a short time by controlling the bidirectional DC / DC, first of all, because the charge and discharge control module is connected to the battery pack through the charging CAN bus, the central controller at this time can collect relevant information of the battery pack through the charge and discharge control module, and judge the vehicle type of the connected vehicle based on the relevant information, thereby extracting the capacity estimation model corresponding to the vehicle type in the memory based on the vehicle type corresponding to the connected vehicle. It should be noted that in order to improve the accuracy of the capacity detection of the power battery and the reusability of the capacity detection equipment, the memory of the capacity detection equipment contains capacity estimation models corresponding to several vehicle types.

[0075] After the central controller extracts the capacity estimation model corresponding to the vehicle type of the connected vehicle from the memory, it sends the capacity estimation model to the capacity calculation module connected thereto, and performs capacity detection on the power battery of the connected vehicle in the capacity calculation module.

[0076] At this time, the central controller will collect the charge and discharge parameters of the battery pack during the charge and discharge process through the charge and discharge module, and send the collected charge and discharge parameters to the capacity calculation module. In the process of the central controller collecting the charge and discharge parameters, the capacity calculation module will collect the power battery parameters in the vehicle controller connected to the vehicle based on the CAN bus, such as the power battery voltage parameters, power battery temperature parameters, power battery temperature parameters, etc. in the vehicle controller, and load the collected power battery parameters and the charge and discharge parameters sent by the central controller into the capacity estimation model. Because the capacity estimation model is constructed by training based on the historical vehicle operation data of this vehicle type, the capacity estimation model can output the capacity detection result of the power battery connected to the vehicle based on the loaded power battery parameters and charge and discharge parameters, that is, the capacity value.

[0077] It should be noted that the communication connection mode in this embodiment is the CAN bus and the charging CAN bus. Depending on the actual application, it can also be other communication connection modes with data transmission function.

[0078] In addition, the capacity calculation module is also provided with a display component. After the capacity value is detected, the capacity value is sent and displayed directly in the display component.

[0079] In addition, in addition to storing the capacity estimation model, the memory also stores, for example, capacity detection results sent by the central controller.

[0080] Because the capacity detection equipment is composed of the capacity calculation module, central controller, charge and discharge module, memory, bidirectional DC / DC, direct plug-in charging port and national standard fast charging interface as mentioned above, and the above components are very small in size, the capacity detection equipment constructed in this way must also be very small in size. Compared with the existing capacity detection equipment, it will not occupy the equipment placement area of the maintenance center, and can also be conveniently carried and operated by maintenance personnel.

[0081] Reference Figure 3 An embodiment of the present invention provides a capacity value detection method, the capacity value detection method comprising the following steps:

[0082] Step S10, when the capacity detection device detects an incoming vehicle, after determining the vehicle type of the incoming vehicle, extracting a capacity estimation model corresponding to the vehicle type in the capacity detection device;

[0083] The access vehicle refers to the electric vehicle to be tested that is connected to the capacity test equipment. According to the type of charging port of the electric vehicle to be tested, for example, Figure 4When the charging port type of the electric vehicle to be tested is a DC charging port c, the DC charging port c is connected to the national standard fast charging interface of the capacity detection device through the DC bus. At this time, the bidirectional DC / DC in the capacity detection device will perform short-term charging and discharging to the power battery of the connected vehicle through the national standard fast charging interface, and the charging and discharging mode is controlled by the charge and discharge control module. At this time, the capacity detection device detects the connected vehicle based on the access status of the national standard fast charging interface, and after judging the vehicle type of the connected vehicle, extracts the capacity estimation model corresponding to the vehicle type in the capacity detection device based on the vehicle type.

[0084] The reason why we need to extract the capacity estimation model corresponding to the vehicle type based on the vehicle type is because in order to improve the accuracy of the capacity value detection of the power battery and the reusability of the capacity detection equipment, the capacity detection equipment contains capacity estimation models for several vehicle types. Through one capacity detection equipment, the capacity value detection of power batteries of multiple vehicle types can be realized, reducing the equipment cost of the maintenance center.

[0085] Optionally, in step S10, when the capacity detection device detects an incoming vehicle, after determining the incoming vehicle to obtain the vehicle type, the step of extracting a capacity estimation model corresponding to the vehicle type in the capacity detection device includes:

[0086] Step S101, when the central controller detects the access vehicle, it determines the vehicle type of the access vehicle and obtains the vehicle type corresponding to the access vehicle;

[0087] Step S102 : extracting a capacity estimation model corresponding to the vehicle type from the memory according to the vehicle type through the central controller, and sending the capacity estimation model to the capacity calculation module.

[0088] The capacity detection device is provided with a central controller, a memory and a capacity calculation module.

[0089] For example, refer to Figure 4As shown, when the charging port type of the electric vehicle to be tested is the DC charging port c, the DC charging port c is connected to the national standard fast charging interface of the capacity detection equipment through the DC bus. At this time, the central controller detects the connected vehicle based on the access status of the national standard fast charging interface. In order to extract the capacity estimation model corresponding to the vehicle type of the connected vehicle from the memory, the central controller will judge the vehicle type of the connected vehicle. Specifically, because the charge and discharge control module can be connected to the battery pack in the power battery of the connected vehicle through the charging CAN bus, and the charge and discharge control module is connected to the central controller, the central controller can collect relevant information of the battery pack of the power battery of the connected vehicle through the charge and discharge module, such as the battery pack model, the factory capacity of the battery pack, the factory number of the battery pack, etc. The central controller can judge the vehicle type of the connected vehicle based on the collected relevant information of the battery pack.

[0090] After the central controller determines the vehicle type, it will extract the capacity estimation model corresponding to the vehicle type from the connected memory according to the vehicle type, and send the extracted capacity estimation model to the capacity calculation module, which will detect and display the capacity value of the power battery connected to the vehicle.

[0091] Step S20 : detecting the to-be-calculated parameters of the connected vehicle through the capacity estimation model to obtain the capacity value of the power battery of the connected vehicle.

[0092] After receiving the parameters to be calculated, the capacity calculation module loads the parameters to be calculated into the capacity estimation model of the capacity calculation module, detects the parameters to be calculated based on the capacity estimation model, and obtains the detection result, that is, the capacity value of the power battery connected to the vehicle.

[0093] Optionally, before the step of detecting the to-be-calculated parameters of the connected vehicle using the capacity estimation model in step S20, the method further includes:

[0094] Step S201: The central controller collects charge and discharge parameters of the connected vehicle in the charge and discharge control module via a communication connection, and sends the charge and discharge parameters to the capacity calculation module;

[0095] Step S202, loading the charge and discharge parameters into the capacity estimation model through the capacity calculation module; and,

[0096] Step S203 : collecting power battery parameters of the connected vehicle through the capacity calculation module, and loading the power battery parameters into the capacity estimation model.

[0097] Reference Figure 4As shown, the central controller collects the charge and discharge parameters of the battery pack during the charge and discharge process through the charge and discharge module, and sends the collected charge and discharge parameters to the capacity calculation module, which loads the charge and discharge parameters into the capacity estimation model. At the same time, in the process of the central controller collecting the charge and discharge parameters, the capacity calculation module at this time will be connected to the OBD (On-Board-Diagnosti, on-board diagnostic system) interface d of the connected vehicle through the CAN bus, and then collect the power battery parameters in the vehicle controller of the connected vehicle through the OBD interface d, such as power battery voltage parameters, power battery temperature parameters, power battery temperature parameters, etc., and load the collected power battery parameters into the capacity estimation model as well, so that the capacity estimation model can detect the capacity value of the power battery according to the loaded charge and discharge parameters and power battery parameters.

[0098] Optionally, the step of detecting the to-be-calculated parameters of the connected vehicle by using the capacity estimation model in step S20 includes:

[0099] Step S204 : detecting the loaded charge and discharge parameters and power battery parameters through the capacity estimation model.

[0100] Because the capacity estimation model is constructed by training based on the attenuation characteristics in the historical vehicle operation data of the same vehicle, and the attenuation characteristics are parameters such as charging and discharging time, power battery voltage parameters, power battery temperature parameters, and power battery temperature parameters, therefore, if the capacity value of the power battery connected to the vehicle is to be obtained based on the capacity estimation model, it is necessary to input the charging and discharging parameters and power battery parameters of the vehicle, so that the capacity estimation model can be detected based on the charging and discharging parameters and power battery parameters to obtain the capacity value of the power battery connected to the vehicle.

[0101] Optionally, after obtaining the capacity value of the power battery of the connected vehicle in step S20, the method further includes:

[0102] Step S205: Displaying the capacity value based on a display component in the capacity detection device, wherein the display component is provided on the capacity calculation module.

[0103] The display component is set on the capacity calculation module, so that the capacity estimation model can directly send the capacity value to the display component after detecting the capacity value, and display the capacity value through the display component.

[0104] In this embodiment, the vehicle type of the connected vehicle is judged by the capacity detection device, and the capacity estimation model corresponding to the vehicle type is extracted according to the vehicle type, thereby improving the accuracy of the capacity value detection of the power battery and the reusability of the capacity detection device. By detecting the parameters to be calculated of the connected vehicle according to the capacity estimation model, the capacity value of the power battery is obtained, so that the user can obtain the capacity size and quality of the power battery, that is, the capacity value, in a short time, thereby improving the detection efficiency and reducing the volume and cost of the detection equipment, which is convenient for practical application and promotion.

[0105] refer to Figure 5 Furthermore, another embodiment of the present invention provides a capacity value detection method. Before the step of detecting a connected vehicle based on the capacity detection device in step S101, the method further includes:

[0106] Step A1, acquiring historical vehicle operation data, and extracting attenuation features from the historical vehicle operation data;

[0107] Step A2: Perform training based on the attenuation characteristics to construct a capacity estimation model, and send the capacity estimation model to the capacity detection device for storage.

[0108] The historical vehicle operation data is the vehicle operation data of the same vehicle type, wherein the historical vehicle operation data is placed in a distributed memory. By extracting the vehicle operation data of the same vehicle type in the distributed memory, the extracted vehicle operation data is improved based on a preset algorithm to extract parameters such as charging and discharging time, power battery voltage parameters, power battery temperature parameters, power battery temperature parameters, and power battery capacity value in the vehicle operation data. The extracted parameters are classified as attenuation characteristics, and the relationship between the parameters is established. The capacity estimation model is trained and constructed based on the relationship, so that after receiving the charging and discharging parameters and power battery parameters of the power battery in the later stage, the capacity value of the power battery can be directly detected in a short time based on the capacity estimation model, thereby improving detection efficiency.

[0109] The constructed capacity estimation model is written into the memory of the capacity detection device by writing into the device or using a network protocol, and is stored so as to be retrieved when needed.

[0110] In this embodiment, a capacity estimation model for the vehicle type is constructed by training based on the attenuation characteristics in the historical vehicle operation data of the same vehicle type, so that after receiving the charge and discharge parameters and power battery parameters of the power battery in the future, the capacity value of the power battery can be directly detected in a short time based on the capacity estimation model, thereby improving the detection efficiency.

[0111] In addition, an embodiment of the present invention also proposes a vehicle detection device, which includes a capacity detection device, a processor, and a computer program stored in a memory and runnable on the processor. When the processor executes the computer program, the steps of the above-mentioned capacity value detection method are implemented.

[0112] In addition, the present invention also proposes a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the above-mentioned capacity value detection method are implemented.

[0113] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or system comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or system. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or system comprising the element.

[0114] The serial numbers of the above embodiments of the present invention are for description only and do not represent the advantages or disadvantages of the embodiments.

[0115] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better embodiment. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for enabling a terminal device (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods of various embodiments of the present invention.

[0116] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A capacity detection device, characterized in that the capacity detection device comprises: Capacity calculation module, central controller and charge and discharge control module; The capacity calculation module is connected to the central controller and establishes a communication connection with the vehicle controller of the connected vehicle. The capacity calculation module includes a capacity estimation model, which is trained based on the attenuation characteristics in the vehicle's historical operating data, wherein the capacity estimation model corresponds to the vehicle type of the connected vehicle; The central controller is connected to the charge and discharge control module, and the charge and discharge control module establishes a communication connection with the battery pack of the connected vehicle through a bidirectional DC / DC; The central controller collects the charge and discharge parameters of the connected vehicle through the charge and discharge control module, and sends the charge and discharge parameters to the capacity calculation module; The capacity calculation module collects the power battery parameters of the connected vehicle through a communication connection, and performs capacity detection of the power battery of the connected vehicle based on the power battery parameters and the charge and discharge parameters.

2. The capacity detection device according to claim 1, wherein: The capacity detection device also includes: a memory, the bidirectional DC / DC, a direct plug charging port and a national standard fast charging interface; The memory is connected to the central controller; The direct plug-in charging port and the national standard fast charging interface are placed on the capacity detection device, the bidirectional DC / DC is connected to the direct plug-in charging port and the national standard fast charging interface respectively, and the bidirectional DC / DC is connected to the charge and discharge control module.

3. A capacity value detection method, characterized in that: The capacity value detection method is applied to the capacity detection device according to any one of claims 1 to 2, and the capacity value detection method comprises the following steps: When the capacity detection device detects an access vehicle, after determining the access vehicle to obtain the vehicle type, the capacity estimation model corresponding to the vehicle type is extracted from the capacity detection device; The capacity estimation model is used to detect the parameters to be calculated of the connected vehicle to obtain the capacity value of the power battery of the connected vehicle.

4. The capacity value detection method according to claim 3, wherein: Before the step of detecting an access vehicle based on the capacity detection device, the method further includes: Acquiring historical vehicle operation data, and extracting attenuation features from the historical vehicle operation data; Training is performed based on the attenuation characteristics to construct a capacity estimation model, and the capacity estimation model is sent to the capacity detection device for storage.

5. The capacity value detection method according to claim 4, wherein: The capacity detection device includes a charge and discharge control module, a central controller, a memory, and a capacity calculation module. When the capacity detection device detects an access vehicle, after determining the access vehicle type, the capacity detection device extracts a capacity estimation model corresponding to the vehicle type, including: When the central controller detects the access vehicle, it determines the vehicle type of the access vehicle and obtains the vehicle type corresponding to the access vehicle; The central controller extracts a capacity estimation model corresponding to the vehicle type from the memory according to the vehicle type, and sends the capacity estimation model to the capacity calculation module.

6. The capacity value detection method according to claim 5, wherein: Before the step of detecting the to-be-calculated parameters of the connected vehicle using the capacity estimation model, the method further includes: The central controller collects the charge and discharge parameters of the connected vehicle in the charge and discharge control module via a communication connection, and sends the charge and discharge parameters to the capacity calculation module; Loading the charge and discharge parameters into the capacity estimation model through the capacity calculation module; and, The power battery parameters of the connected vehicle are collected through the capacity calculation module, and the power battery parameters are loaded into the capacity estimation model.

7. The capacity value detection method according to claim 6, wherein: The parameters to be calculated include power battery parameters and charge and discharge parameters. The step of detecting the parameters to be calculated of the connected vehicle using the capacity estimation model includes: The capacity estimation model is used to detect the loaded charge and discharge parameters and power battery parameters.

8. The capacity value detection method according to claim 7, wherein: After the step of obtaining the capacity value of the power battery of the connected vehicle, the method further includes: The capacity value is displayed based on a display component in the capacity detection device, wherein the display component is provided on the capacity calculation module.

9. A vehicle detection device, characterized in that: The vehicle detection device includes: a capacity detection device as described in any one of claims 1 to 2, a processor and a computer processing program stored in a memory and capable of running on the processor, and when the processor executes the computer processing program, the steps of the capacity value detection method as described in any one of claims 3 to 8 are implemented.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the capacity value detection method according to any one of claims 3 to 8.

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