WO2022012488A1 - Vehicle detection method and apparatus, and detection device - Google Patents

Abstract

A vehicle detection method, applied to a detection device (100), the detection device (100) being connected to a storage battery (32) in a vehicle (200) by means of an electric connector (33), and being communicationally connected to an electronic control unit in the vehicle (200) by means of a hardware communication interface. The method comprises: determining a CCA value of the storage battery (32) according to the internal resistance of the storage battery (32) (S10); determining the battery health degree of the storage battery (32) according to the CCA value (S20); sending a diagnosis command to an electronic control unit in the vehicle (200) to obtain a diagnosis measurement result, the diagnosis measurement result comprising at least one of a battery load state, the current battery usage mileage, and a previous battery usage mileage (S30); and generating a health assessment report of the vehicle (200) according to the battery health degree and the diagnosis measurement result. By combining electrical characteristic detection and diagnosis detection, the present method can solve the problem of misjudgment existing in fault detection of the existing automobile starting systems, and improve the accuracy of fault detection.

Description

A vehicle detection method, device and detection equipment

This application claims the priority of the Chinese patent application filed on July 13, 2020 with the application number 202010671354.4 and the application title is "a vehicle detection method, device and detection equipment", the entire contents of which are incorporated by reference in this application.

technical field

The present application relates to the technical field of automotive electronics, and in particular, to a vehicle detection method, device, and detection equipment.

Background technique

Due to the development of science and technology, there are more and more electronic units in the car, and the battery belongs to the core component of the car, which affects the working state of various automotive electrical appliances; the battery, starter and generator together form the car's starting system, any one of the components Problems will cause the car to fail to start and break down halfway. Therefore, the fault detection of the car's starting system and the prediction of faults in advance are becoming more and more important.

The traditional battery tester only judges the quality of the battery, starter and generator by testing the electrical characteristics of the battery. Since the signal difference between an abnormal battery and a good battery is very small, especially the battery state measurement at different times will exist. The difference leads to low measurement accuracy and easy misjudgment, so that a good battery is detected as a bad battery, and a bad battery cannot be detected. Generally, the diagnostic instrument can only interact with the ECU through the DLC connector to obtain the SOC status of the battery.

In view of this, the existing technology is in urgent need of improvement.

SUMMARY OF THE INVENTION

The embodiments of the present invention aim to provide a vehicle detection method, device and detection device, which solve the problem of misjudgment in the fault detection of the current vehicle starting system, and improve the accuracy of fault detection.

In order to solve the above-mentioned technical problems, the embodiments of the present invention provide the following technical solutions:

In a first aspect, an embodiment of the present invention provides a vehicle detection method, which is applied to a detection device. The detection device is connected to a battery in a vehicle through an electrical connector, and the detection device communicates with the vehicle through a hardware communication interface. The electronic control unit communication connection, the method includes:

Determine the CCA value of the battery according to the internal resistance of the battery;

determining the battery health of the storage battery according to the CCA value;

sending a diagnostic command to an electronic control unit in the vehicle to obtain diagnostic measurements including at least one of battery load status, current battery mileage, and last battery mileage;

A health assessment report for the vehicle is generated based on the battery health and the diagnostic measurements.

In some embodiments, the sending of diagnostic commands to an electronic control unit in the vehicle to obtain diagnostic measurements includes:

Obtain vehicle information of the vehicle, where the vehicle information includes VIN information and MMY information;

generating a diagnosis command according to the vehicle information;

A diagnostic command is sent to an electronic control unit in the vehicle to obtain diagnostic measurements, the diagnostic measurements also including trouble codes.

In some embodiments, the vehicle includes a starting system, the starting system includes a battery, a starter, and a generator, and the fault codes include battery fault codes, starter fault codes, generator fault codes, and line fault codes, so The health assessment report of the vehicle further includes at least one of the battery fault codes, starter fault codes, generator fault codes and line fault codes.

In some embodiments, the method further includes:

Present the topology relationship of the startup system through the display interface of the detection device;

Based on the topological relationship, a fault state of the starting system is presented, and the fault state of the starting system includes at least one of the fault states of the battery, the starter and the generator, the number of fault codes, and the location of the line fault.

In some embodiments, the health assessment report of the vehicle includes at least one of remaining battery mileage, battery health, battery load status, battery usage mileage, and last battery usage mileage.

In some embodiments, the diagnostic measurements include: current battery mileage and last battery mileage, and the generating a health assessment report for the vehicle includes:

Determine the estimated remaining mileage according to the mileage used by the last battery and the current mileage used by the battery;

The remaining battery mileage is determined according to the battery health degree and the estimated remaining mileage, combined with a preset health degree threshold.

In some embodiments, the diagnostic measurements include battery load status, and the generating a health assessment report for the vehicle includes:

According to the time proportion of the battery load state in the preset load threshold range, combined with the preset time proportion threshold, the battery usage habit of the storage battery is evaluated, and the battery usage habit includes excessive use, normal use, and over-full use.

In some embodiments, the preset load threshold range includes a first load threshold range, a second load threshold range and a third load threshold range, the first load threshold range is smaller than the second load threshold range, the The second load threshold range is smaller than the third load threshold range, the preset time proportional threshold includes a first time proportional threshold, a second time proportional threshold and a third time proportional threshold, wherein the first time proportional threshold is less than the second time proportion threshold, the second time proportion threshold is smaller than the third time proportion threshold, and the battery usage habit of the battery is evaluated according to the time proportion when the battery load state is within a preset load threshold range ,include:

If the time proportion in which the battery load state is in the first load threshold range is greater than the first time proportion threshold, determining that the use habit of the battery is excessive use;

If the time proportion in which the battery load state is in the second load threshold range is greater than the second time proportion threshold, it is determined that the use habit of the battery is normal use;

If the time proportion when the battery load state is in the third load threshold range is greater than the third time proportion threshold, it is determined that the usage habit of the battery is over-full usage.

In some embodiments, the health assessment report of the vehicle further includes maintenance recommendations, and the generating the health assessment report of the vehicle includes:

If the battery health degree is lower than the first battery health degree threshold, the maintenance recommendation is to recommend battery replacement;

If the battery health degree is higher than the first battery health degree threshold but lower than the second battery health degree threshold, the maintenance recommendation is to recommend maintenance after the first time period;

If the battery health degree is higher than the second battery health degree threshold, the maintenance suggestion is to recommend maintenance after a second time period, wherein the second time period is greater than the first time period.

In a second aspect, an embodiment of the present invention provides a vehicle detection device, which is applied to a battery detection device. The battery detection device is connected to a battery in a vehicle through an electrical connector, and the battery detection device is connected to a battery through a hardware communication interface. The electronic control unit in the vehicle is communicatively connected, and the device includes:

The CCA value unit is used to determine the CCA value of the battery according to the internal resistance of the battery;

a battery health degree unit, configured to determine the battery health degree of the storage battery according to the CCA value;

A diagnostic measurement result unit for sending a diagnostic command to an electronic control unit in the vehicle to obtain diagnostic measurement results, the diagnostic measurement results including battery load status, current battery usage mileage, and the last battery usage mileage at least one of;

a health assessment report unit, configured to generate a health assessment report of the vehicle according to the battery health degree and the diagnostic measurement result.

In a third aspect, an embodiment of the present invention provides a detection device, the detection device is connected to a battery in a vehicle through an electrical connector, and the detection device is communicatively connected to an electronic control unit in the vehicle through a hardware communication interface, The battery testing equipment includes:

a battery measurement module, used for conducting conductance measurement on the vehicle to obtain conductance measurement results, where the conductance measurement results include battery health;

A diagnostic measurement module for sending a diagnostic command to an electronic control unit in the vehicle to obtain diagnostic measurement results, the diagnostic measurement results including battery load status, current battery usage mileage, and last battery usage mileage at least one;

A control module, connected to the battery measurement module and the diagnostic measurement module, the control module includes:

at least one processor; and

a memory communicatively coupled to the at least one processor; wherein,

The memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform the vehicle detection method as described above.

In a fourth aspect, embodiments of the present invention provide a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the above-described vehicle detection method is implemented.

The beneficial effects of the embodiments of the present invention are: different from the prior art, a vehicle detection method provided by the embodiments of the present invention is applied to a detection device, and the detection device is connected to a battery in a vehicle through an electrical connector , and the detection device is communicatively connected to the electronic control unit in the vehicle through a hardware communication interface, and the method includes: determining the CCA value of the battery according to the internal resistance of the battery; determining the CCA value according to the CCA value the battery health of the battery; sending diagnostic commands to the electronic control unit in the vehicle to obtain diagnostic measurements including battery load status, current battery mileage, and last battery mileage At least one of; generating a health assessment report for the vehicle based on the battery health and the diagnostic measurement. By combining electrical characteristic detection and diagnostic detection, the present invention can solve the problem of misjudgment in the fault detection of the current vehicle starting system, and improve the accuracy of fault detection.

Description of drawings

One or more embodiments are exemplified by the pictures in the corresponding drawings, and these exemplifications do not constitute limitations of the embodiments, and elements with the same reference numerals in the drawings are denoted as similar elements, Unless otherwise stated, the figures in the accompanying drawings do not constitute a scale limitation.

1 is a schematic structural diagram of a vehicle detection system provided by an embodiment of the present invention;

2 is a schematic flowchart of a vehicle detection method provided by an embodiment of the present invention;

3 is a schematic structural diagram of a battery detection system provided by an embodiment of the present invention;

FIG. 4 is a schematic diagram of a detailed structure of the battery detection system in FIG. 3;

FIG. 5 is a detailed structural schematic diagram of the battery detection system in FIG. 4;

6 is a schematic diagram of the circuit structure of the battery detection system in FIG. 5;

Fig. 7 is the refinement flow chart of step S30 in Fig. 2;

8a is a schematic diagram of a line test provided by an embodiment of the present invention;

8b is a schematic diagram of a generator test provided by an embodiment of the present invention;

9 is a schematic diagram of a detection process provided by an embodiment of the present invention;

10 is a schematic structural diagram of a vehicle detection device provided by an embodiment of the present invention;

11 is a schematic structural diagram of a detection device provided by an embodiment of the present invention;

FIG. 12 is a schematic structural diagram of another detection device provided by an embodiment of the present invention.

detailed description

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

In the embodiment of the present invention, the detection equipment includes a battery detector, a diagnostic instrument, a smart phone, a PDA (Personal Digital Assistant, PDA), a tablet computer, a smart watch, and other electronic equipment that can detect automobiles.

Specifically, the embodiments of the present invention will be described in detail below by taking the detection equipment including a battery detector and a diagnostic instrument as an example.

Please refer to FIG. 1, which is a schematic diagram of a vehicle detection system according to an embodiment of the present invention;

As shown in FIG. 1 , the detection system 300 of the vehicle includes: a vehicle 200 and a detection device 100 communicatively connected to the vehicle.

The vehicle 200 may specifically be a motor vehicle of any model, such as a truck, a car, a bus, etc., and has an electronic control system composed of a plurality of electronic control units to coordinate and control the operation of the vehicle according to the driver, etc. command and monitor one or more vehicle parameters in real time to ensure reliable and safe operation of the vehicle 200 .

It can be understood that, in different models or models of vehicles, the electronic control units are different according to the differences in their structural settings and assumed functions, resulting in different electronic control unit lists.

Among them, the communication connection between various electronic control units in the vehicle is usually in the form of a bus. Each electronic control unit uses a specific communication protocol. According to the communication protocol used by the electronic control unit, it will communicate on the corresponding vehicle bus to avoid conflicts and improve efficiency. That is, electronic control units using the same communication protocol communicate on one vehicle bus, and one vehicle bus corresponds to one communication protocol.

In order to facilitate routine inspection and maintenance, the vehicle 200 may also have at least one hardware communication interface, such as an OBD interface. The hardware communication interface and the vehicle 200 can be connected to one or more vehicle buses, and are used to establish a communication connection with an external device, so that it can complete processes such as data interaction with the electronic control unit.

The testing device 100 includes a battery tester (Battery Tester) and a diagnostic device (Diagnostic).

Wherein, the battery tester can be any type of vehicle diagnostic product. The battery tester generally measures the electrical characteristics of the vehicle battery and the starting system, and judges the battery and starting system according to the change of the electrical characteristics. Good or bad, specifically, the battery tester includes at least one electrical connector, and the end of the electrical connector is a diagnostic connector that matches the hardware communication interface of the vehicle 10 , and the electrical connector includes a Kelvin connector , low frequency circular connectors, optical fiber connectors, rectangular connectors, printed circuit connectors, radio frequency connectors and other connectors, preferably, the electrical connector in the embodiment of the present invention is a Kelvin connector.

Wherein, the diagnostic instrument communicates with the electronic control unit (Electronic control unit) to obtain the status of the parts on the vehicle to assist in fault maintenance, and the diagnostic instrument interacts with the electronic control unit ECU through the DLC connector to Get the status of the battery, including the battery load status. Wherein, the electronic control unit (Electronic control uint, ECU) is used to control multiple components of the vehicle, such as: engine, gearbox, window, door, instrument panel and other components.

In actual use, the detection device 100 establishes physical communication connections with various vehicle buses in the vehicle through interface modules, such as diagnostic connectors and hardware communication interfaces, and loads a suitable or paired protocol configuration to achieve communication with the electronic control system. Data interaction between them, such as sending detection commands or receiving detection data.

In the embodiment of the present invention, the vehicle 200 further includes components such as tires, steering wheels, and drive motors, which belong to the prior art and will not be repeated here.

Please refer to FIG. 2, which is a schematic flowchart of a vehicle detection method provided by an embodiment of the present invention;

As shown in Figure 2, the vehicle detection method is applied to a detection device, the detection device is connected to a battery in a vehicle through an electrical connector, and the detection device is communicatively connected to an electronic control unit in the vehicle through a hardware communication interface. The method include:

Step S10: Determine the CCA value of the battery according to the internal resistance of the battery;

Specifically, the detection device includes a battery detector, the battery detector is connected to the battery in the vehicle through an electrical connector, and the battery detector determines the CCA value of the battery through conductance measurement, specifically, The battery detector and the battery form a battery detection system. For details, please refer to FIG. 3 again. FIG. 3 is a schematic structural diagram of a battery detection system provided by an embodiment of the present invention;

As shown in FIG. 3 , the battery detector 31 is electrically connected to the battery 32 for measuring the electrical parameters of the battery 32 and determining the health state of the battery.

The storage battery 32 is a device that directly converts chemical energy into electrical energy and realizes recharging through a reversible chemical reaction, that is, when charging, external electrical energy is used to regenerate internal active substances, and electrical energy is stored as chemical energy. Again the chemical energy is converted into electrical output. The battery 32 includes one or more cells. Generally, the rated voltage of one cell is 2V. The multiple cells can be connected in series or in parallel, so the rated voltage of the battery 32 can be 2V, 4V, 6V, 8V. , 12V, 24V, etc. For example, a vehicle battery generally consists of 6 lead-acid cells in series to form a battery pack with a rated voltage of 12V for small cars, or 12 lead-acid cells in series to form a battery pack with a rated voltage of 24V for large vehicles. It can be understood that the rated voltage of the vehicle battery can also be designed to other specifications according to the actual situation.

After the battery 32 has been charged and discharged for many times, health problems such as wear, bad cells (damaged cells), and insufficient power may occur, resulting in the vehicle not running normally. Therefore, it is extremely important to be able to determine the health status of the battery 32 in advance, so that the user can The condition of the battery 32 is clearly understood, thereby avoiding the risk of start-up operation. The state of health of the battery 32 is an index used to evaluate the working ability of the battery 32. For example, the state of health may include whether it is close to being scrapped (bad battery), whether there is a bad cell (bad battery), whether it is in good condition ( good battery) or whether the power is sufficient (insufficient battery), etc. The health state of the battery 32 will affect the electrical parameters of the battery 32, for example, the voltage will decrease when the battery is damaged.

The battery tester 31 is electrically connected to the battery 32, for example, the positive and negative electrodes of the battery 32 can be connected through an electrical connector 33, such as a Kelvin connector. The battery detector 31 is used to measure the electrical parameters of the battery 32, the electrical parameters include basic parameters such as voltage and current, and may also include parameters derived from voltage and current, such as internal resistance and CCA value. Therefore, the battery detector 31 can judge the health state of the battery 32 according to the electrical parameters and a preset algorithm.

Please refer to FIG. 4 again, FIG. 4 is a detailed schematic diagram of the battery detection system in FIG. 3 ;

As shown in FIG. 4 , the battery detector 31 includes a discharge circuit 311 , a voltage sampling circuit 312 and a controller 313 .

Please refer to FIG. 5 again. FIG. 5 is a detailed schematic diagram of the battery detection system in FIG. 4 ;

As shown in FIG. 5 , the battery detector 31 includes a first connection end 301 , a second connection end 302 , a third connection end 303 and a fourth connection end 304 . The first connection end 301 , the second connection end 301 and the second connection end The terminal 302, the third connection terminal 303 and the fourth connection terminal 304 are respectively used to connect the battery. In this embodiment, the first connection end 301 and the second connection end 302 are both electrically connected to the positive electrode of the battery 32, and the third connection end 303 and the fourth connection end 304 are both electrically connected to the positive electrode of the battery 32. The negative electrode of the battery 32 is electrically connected. In some embodiments, the first connection end 301 , the second connection end 302 , the third connection end 303 and the fourth connection end 304 can also be Kelvin connectors, that is, the battery tester 31 passes through the Kelvin connectors. The connector electrically connects the battery 32 , eliminating wiring, and eliminating resistance due to the contact connection when current flows through the positive or negative poles of the battery 100 .

For the above-mentioned discharge circuit 311, the battery 32 is electrically connected to the battery 32 through the first connection terminal 301 and the fourth connection terminal 304, so as to trigger the battery 32 to discharge. When the discharge circuit 311 is in an on state, the discharge circuit 311 and the battery 32 form a discharge loop, which triggers the battery 100 to discharge.

In this embodiment of the present invention, the discharge circuit 311 includes a switch circuit 3111 , a load 3112 and a current sampling circuit 3113 .

The first terminal of the switch circuit 3111 is connected to the first connection terminal 301 , the second terminal of the switch circuit 3111 is connected to the controller 313 , and the third terminal of the switch circuit 3111 is connected to the controller 313 through the load 3112 . The fourth connection terminal 304 is used to close or open the discharge circuit between the switch circuit 3111, the load 3112 and the battery 32 according to the voltage signal sent by the controller 313, and to adjust the discharge circuit degree of conduction.

The first end of the current sampling circuit 3113 is connected to the controller 313 , the second end of the current sampling circuit 3113 is connected to the load 3112 , and the current sampling circuit 3113 is used to detect the switch circuit 3111 and the load 3112 The current in the discharge circuit formed with the battery shape 200 is the discharge current of the battery 32 .

The controller 313 adjusts the switch circuit 3111 according to the magnitude of the discharge current detected by the current sampling circuit 20, so that the battery 32 is discharged under the preset discharge condition, wherein the preset discharge condition includes The storage battery 32 is discharged for a preset period of time according to a preset discharge current.

Please refer to FIG. 6 again, FIG. 6 is a schematic diagram of the circuit structure of the battery detection system in FIG. 5;

As shown in FIG. 6 , the switch circuit 3111 includes a MOS transistor Q and a first operational amplifier U1. The non-inverting input terminal of the first operational amplifier U1 is connected to the controller 313 (the DAC port of the microcontroller U4). The inverting input terminal of an operational amplifier U1 is connected to the source of the MOS transistor Q, the output terminal of the first operational amplifier U1 is connected to the gate of the MOS transistor Q, and the source of the MOS transistor Q is connected to the The first terminal of the load 3112 and the drain of the MOS transistor Q are connected to the first connection terminal 301 . The second end of the load 3112 is connected to the fourth connection end 304 , and the fourth connection end 304 is electrically connected to the negative electrode of the battery 32 .

When the MOS transistor Q is turned off, the voltage of the first terminal of the load 3112 and the source voltage of the MOS transistor Q are both the negative voltage of the battery 32, that is, the first operational amplifier U1 Input the negative voltage at the inverting input terminal of . When the controller 313 sends a voltage signal to the non-inverting input terminal of the first operational amplifier U1, the first operational amplifier U1 processes the voltage signal and the negative voltage, and outputs a first driving signal until The gate of the MOS transistor Q, so that a voltage difference VGS is formed between the gate and the source of the MOS transistor Q. Wherein, the magnitude of the first driving signal is related to the magnitude of the voltage signal. By adjusting the voltage signal, the first driving signal is further adjusted, so that when the voltage difference VGS is greater than the turn-on voltage of the MOS transistor Q, the MOS transistor Q is turned on, and the discharge loop generates current, that is, The battery 32 begins to discharge.

When the MOS transistor Q is turned on, the discharge current flows through the load 3112, and the voltage of the first terminal of the load 3112 increases, that is, the voltage of the first terminal of the load 3112 is equivalent to the voltage of the load 3112. The voltage drop value of the load 3112 is sent to the inverting input terminal of the first operational amplifier U1 as a voltage drop signal. Due to the negative feedback effect of the first operational amplifier U1, after processing the voltage signal and the voltage drop signal, the first operational amplifier U1 will output a stable second driving signal to the MOS transistor Q's gate. Under the action of the stable second driving signal, the conduction degree of the MOS transistor Q is certain, and the internal resistance of the channel of the MOS transistor Q is stable, so that the discharge current in the discharge loop can be ensured to be stable. In addition, the magnitude of the second driving signal is related to the magnitude of the voltage signal sent by the controller 313 , so that a stable discharge current of a corresponding magnitude can be obtained by adjusting the voltage signal sent by the controller 313 .

In some embodiments, the load 3112 includes a resistor R, a first terminal of the resistor R is electrically connected to the source of the MOS transistor Q, and a second terminal of the resistor R is electrically connected to the fourth connection terminal 304 . The resistance value of the resistor can be set according to the actual situation, for example, the resistance value of the resistor is 10 mΩ, so that the discharge current of the battery 32 can be a large current.

In some embodiments, the current sampling circuit 3113 includes a second operational amplifier U2, the non-inverting input terminal of the second operational amplifier U2 is connected to the first terminal of the load 3112, and the inverting phase of the second operational amplifier U2 The input terminal is connected to the second terminal of the load 3112, and the output terminal of the second operational amplifier U2 is connected to the controller. Therefore, the voltage of the first terminal of the load 3112 is input to the non-inverting terminal of the second operational amplifier U2, and the voltage of the second terminal of the load 3112 is input to the inverting terminal of the second operational amplifier U2. After processing by the operational amplifier U2, the voltage across the load 3112 is obtained and sent to the controller 313, and the controller 313 can determine the flow through the The current of the load 3112 is the discharge current in the discharge circuit.

In some embodiments, the discharge circuit 311 further includes a diode D1, a first end of the diode D1 is connected to the first connection end 301, and a second end of the diode D1 is connected to the The drain of the MOS transistor Q, the diode D1 is used to prevent the discharge current from flowing back into the battery 32 . When the first connection terminal 301 is connected to the positive electrode of the battery 32 , the anode of the diode D1 is connected to the first connection terminal 301 , and the cathode of the diode D1 is connected to the anode of the MOS transistor Q. The drain uses the unidirectional conductivity of the diode D1, so that in the discharge circuit, the discharge current always flows from the positive electrode of the battery 32 through the MOS transistor Q and the load 3112, and finally flows back to the battery 32 The negative pole of the battery 32 prevents the current from flowing backwards and burns the battery 32 .

For the above-mentioned voltage sampling circuit 312 , the battery 32 is electrically connected to the battery 32 through the second connection terminal 302 and the third connection terminal 303 for detecting the voltage across the battery 32 . When the discharge circuit 311 is in the disconnected state, the voltage across the battery 32 collected by the voltage sampling circuit 312 is an open-circuit voltage; when the discharge circuit 311 is in the connected state, the battery 32 is discharged, so The voltage across the battery 32 collected by the voltage sampling circuit 312 is the discharge voltage.

In some embodiments, the voltage sampling circuit 312 includes a third operational amplifier U3, the non-inverting input of the third operational amplifier U3 is connected to the second connection terminal 302, and the inverting input of the third operational amplifier U3 The terminal is connected to the third connection terminal 303 , and the output terminal of the third operational amplifier U3 is connected to the controller 313 . In this embodiment, the second connection end 302 is connected to the positive electrode of the battery 32, and the third connection end 303 is connected to the negative electrode of the battery 32, so the voltage collected by the third operational amplifier U3 is the voltage across the battery 32.

The above-mentioned controller 313 is electrically connected to the discharge circuit 311 and the voltage sampling circuit 312 respectively.

As shown in FIG. 6 , the controller 313 includes a single-chip microcomputer U4, and the single-chip microcomputer U4 can adopt 51 series, Arduino series, STM32 series, etc., and the single-chip microcomputer U4 includes a DAC port, an ADC1 port, and an ADC2 port. The DAC port of the single-chip microcomputer U4 is electrically connected to the non-inverting input terminal of the first operational amplifier U1, the ADC1 port of the single-chip microcomputer U4 is electrically connected to the output terminal of the second operational amplifier U2, and the ADC2 port of the single-chip microcomputer U4 is electrically connected to the third operational amplifier. The output terminal of the amplifier U3 is electrically connected.

In other embodiments, the controller 313 may also be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), an ARM (Acorn RISC Machine) or other Programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination of these components; can also be any conventional processor, controller, microcontroller, or state machine; can also be implemented as a combination of computing devices, For example, a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors combined with a DSP core, or any other configuration.

To sum up, the working process of the battery detector 31 is as follows:

(1) When the discharge circuit 311 is disconnected and the battery 32 is not discharged, the third operational amplifier U3 performs signal processing on the voltage across the battery 32 to obtain the open circuit voltage of the battery 32 .

(2) The DAC port of the single-chip microcomputer U4 outputs a voltage signal to the non-inverting input terminal of the first operational amplifier U1, and the source voltage of the MOS transistor Q is input to the inverting input terminal of the first operational amplifier U1. At this time, The source voltage of the MOS transistor Q is the negative electrode voltage of the battery 32 . The first operational amplifier U1 performs signal processing on the voltage signal input at the non-inverting input terminal and the negative voltage input at the inverting input terminal to obtain a first driving signal, the magnitude of which is related to the magnitude of the voltage signal . The first driving signal acts on the gate of the MOS transistor Q, so that a voltage difference VGS is formed between the gate and the source of the MOS transistor Q. By adjusting the voltage signal, the first driving signal is further adjusted, so that when the voltage difference VGS is greater than or equal to the turn-on voltage of the MOS transistor Q, the MOS transistor Q is turned on, and the discharge loop generates a current , that is, the storage battery 32 starts to discharge.

When the MOS transistor Q is turned on, the discharge current flows through the load 3112, and the voltage of the first terminal of the load 3112 increases, that is, the voltage of the first terminal of the load 3112 is equivalent to the voltage of the load 3112. The voltage drop value of the load 3112 is sent to the inverting input terminal of the first operational amplifier U1 as a voltage drop signal. Due to the negative feedback effect of the first operational amplifier U1, after processing the voltage signal and the voltage drop signal, the first operational amplifier U1 will output a stable second driving signal to the MOS transistor Q's gate. Under the action of the stable second drive signal, the battery 32 is discharged with a stable discharge current, wherein the magnitude of the discharge current is related to the magnitude of the second drive signal, and further, the magnitude of the discharge current It is related to the voltage signal input by the controller 313 . Therefore, by adjusting the voltage signal, the battery 32 can be discharged for a preset duration at a preset discharge current.

When the storage battery 32 is discharged at the preset discharge current, the storage battery 32 generates a discharge voltage. The third operational amplifier U3 performs signal processing on the discharge voltage to obtain the discharge voltage, and sends the discharge voltage to the ADC2 port of the microcontroller U4.

When the discharge time reaches the preset duration, stop outputting the voltage signal or adjust the voltage signal, so that the voltage difference VGS between the gate and the source of the MOS transistor Q is smaller than the conduction of the MOS transistor Q When the voltage is turned on, the MOS transistor Q is turned off, the discharge circuit of the battery 32 is cut off, and the battery 32 stops discharging.

(3) The single chip U4 calculates the voltage drop of the battery 32 as the difference between the open circuit voltage and the discharge voltage.

(4) The single-chip microcomputer U4 determines the CCA parameter of the battery according to the voltage drop value and the preset discharge condition, and according to the battery characteristics, the open circuit voltage, the CCA parameter and the preset mapping relationship, The state of health of the battery 32 is determined.

For example: referring to Figure 6, four-wire Kelvin clips are used to clamp the positive and negative electrodes of the battery, the B+/B- loop is a controllable current discharge loop, and the diode D1 on the loop is a discharge current reverse diode, and Q is a current-limiting control MOS tube , U1 is the current size control op amp, R is the current sampling resistor, and U2 is the current signal amplifying op amp. The S+/S- loop is a signal acquisition loop. The S+/S- voltage signal reduces the open-circuit voltage at both ends of the battery to the range that the MCU's ADC can collect through the operational amplifier U3. The MCU outputs a suitable voltage through the DAC interface and cooperates with the op amp U1 to control the conduction degree of the MOS transistor Q, thereby controlling the discharge current of the B+/B- loop; the ADC interface of the MCU is used to collect the open-circuit voltage of S+/S-. Calculate the internal resistance of the battery by measuring the open circuit voltage of the unloaded battery and the on-load voltage when the load is applied at both ends of B+/B-, and at the same time measuring the current value I on R when the battery is loaded;

For example: according to the frequency of 100Hz: control the discharge circuit to release a current of 1.2A for 5ms, in the time window of 2-4ms, start to collect the load voltage Va at both ends of S+/S- at a frequency of 0.1ms each time and save it, and measure at the same time Current value Ia on R under load; close the discharge circuit for 5ms, in the time window of 2-4ms, start to collect the open circuit voltage Vo at both ends of S+/S- at a frequency of 0.1ms each time and save it, and measure the load at the same time When the current value Ib on R is determined, the internal resistance Ri=(Vo-Va)/(la-lb), wherein the open circuit voltage is the no-load voltage. In the embodiment of the present invention, the method further includes: determining the average value of the on-load voltage Va, the open-circuit voltage Vo, and the current values la and lb by performing multiple conductance measurements. , Vo, la, lb are accumulated and averaged, and the internal resistance Ri=(Vo-Va)/(la-lb) is calculated.

Specifically, determining the CCA value of the battery according to the internal resistance of the battery includes:

Calculate the conductance of the battery according to the internal resistance of the battery;

According to the conductance, combined with a preset coefficient and a compensation value, the CCA value of the battery is determined, (Cold Cranking Ampere, CCA).

For example: CCA value=preset coefficient*conductance+compensation value, wherein the conductance=1/internal resistance.

Step S20: Determine the battery health of the storage battery according to the CCA value;

Specifically, determining the battery health of the storage battery according to the CCA value includes:

Get the nominal CCA value;

Calculate the ratio of the CCA value of the battery to the nominal CCA value, and determine the ratio of the CCA value of the battery to the nominal CCA value as the battery health of the battery, where the CCA value is Cold start capability CCA value.

For example: the battery health degree=(CCA value of battery/nominal CCA value)*100%.

In an embodiment of the present invention, the method further includes: measuring the battery state by a conductometric method, and obtaining a conductance measurement result, wherein the conductance measurement result includes a test result of the startup system, such as a battery test result, a generator test result, Starter test results and line test results, wherein the battery test results include: battery state of health (SOH), battery load state (State of charge, SOC) of the battery, voltage of the battery, and The CCA value of the battery, that is, the cold start CCA value, the generator test results include no-load voltage, on-load voltage, output current, and ripple, and the starter test results include battery voltage, starting voltage, starting current, and Start-up time, the circuit test results include starter voltage drop test results, generator voltage drop test results, other circuit test results, leakage current test-current clamp results, and leakage current test-multimeter results.

The ripple is used to indicate whether the signal output by the generator is stable. If the ripple is too large, it means that the signal output by the generator is unstable. Generally, if the ripple exceeds 200mV, the ripple is too large.

Step S30: sending a diagnostic command to the electronic control unit in the vehicle to obtain a diagnostic measurement result, the diagnostic measurement result including at least one of battery load status, current battery mileage and last battery mileage;

Specifically, the vehicle includes a battery management system (Battery Management System, BMS), referred to as a BMS system, which is a system for managing batteries, and usually has a function of measuring battery voltage to prevent or avoid battery over-discharge, over-charge, over-charge Abnormal conditions such as temperature occur. With the development of technology, many functions have been gradually added, including SOC estimation, SOH estimation, abnormal warning, abnormal protection, equalization (passive equalization or active equalization), temperature measurement, current measurement and other functions.

In the embodiment of the present invention, the BMS system is a control system that protects the use safety of the power battery, monitors the use state of the battery at all times, alleviates the inconsistency of the battery pack through necessary measures, and provides a guarantee for the use safety of the new energy vehicle.

Among them, the topology structure of BMS hardware is divided into two types: centralized and distributed. Centralized is to concentrate all the functions of the battery management system in one controller. It is more suitable for occasions where the capacity of the battery pack is relatively small, and the type of module and battery pack is relatively fixed, which can significantly reduce the system cost. Distributed is to separate the main control board and slave control board of the BMS, and even separate the low-voltage and high-voltage parts to increase the flexibility of system configuration and adapt to modules and battery packs of different capacities and specifications.

Specifically, the battery control system includes a plurality of electronic control units, and the detection device includes a diagnostic instrument. The diagnostic instrument is connected to a DLC connector (Diagnostic Link Connector, DLC) through a DLC connector, and is connected to each of the vehicles in the vehicle. An electronic control unit ECU interacts to send diagnostic commands to the electronic control unit in the vehicle to obtain diagnostic measurements including battery load status, current battery mileage, and last battery mileage at least one of the.

Please refer to FIG. 7 again, FIG. 7 is a detailed flowchart of step S30 in FIG. 2 ;

As shown in FIG. 7, this step S30: sending a diagnosis command to the electronic control unit in the vehicle to obtain a diagnosis measurement result, including:

Step S31: Obtain vehicle information of the vehicle, where the vehicle information includes VIN information and MMY information;

Specifically, the vehicle information includes VIN information and MMY information, wherein the VIN information is a VIN code (Vehicle Identitication Number, VIN), and the MMY information (Make Model Year, MMY) is the manufacturer, model and year.

Step S32: generating a diagnosis command according to the vehicle information;

According to the vehicle information, such as: manufacturer, year, and model, a corresponding diagnosis command is determined, and the diagnosis command includes at least one of a starter diagnosis command, a generator diagnosis command, a battery diagnosis command and a line diagnosis command, as shown in the following table 1 shows:

Table 1

Step S33: Send a diagnostic command to the electronic control unit in the vehicle to obtain a diagnostic measurement result, where the diagnostic measurement result also includes a trouble code.

Specifically, sending a diagnosis command to the electronic control unit in the vehicle, specifically, sending at least one of a starter diagnosis command, a generator diagnosis command, a battery diagnosis command, and a line diagnosis command to the electronic control unit in the vehicle , so that the electronic control unit sends a diagnostic measurement result to the detection device after receiving the diagnostic command, wherein the diagnostic measurement result includes the battery load status, the current battery mileage and the mileage used by the last battery. At least one of the mileage.

For example: send the following diagnostic commands to the electronic control unit in the vehicle:

It can be understood that the diagnostic commands are different according to different vehicle information.

In this embodiment of the present invention, the diagnostic measurement result further includes a trouble code.

Specifically, the vehicle includes a starting system, the starting system includes a battery, a starter, and a generator, and the fault codes include battery fault codes, starter fault codes, generator fault codes, and line fault codes. The health assessment report further includes at least one of the battery fault codes, starter fault codes, generator fault codes and line fault codes. The battery fault code, starter fault code, generator fault code and line fault code are all obtained by sending a diagnostic command to the electronic control unit, wherein the battery fault code corresponds to a battery diagnostic command, and the starter The fault code corresponds to the starter diagnostic command, the generator fault code corresponds to the generator diagnostic command, and the line fault code corresponds to the line diagnostic command.

In the embodiment of the present invention, the diagnostic measurement result includes a battery diagnostic result, a starter diagnostic result, a generator diagnostic result, and a circuit diagnostic result, wherein the battery fault code belongs to the battery diagnostic result, and the starter fault code belongs to The starter diagnosis result, the generator fault code belongs to the generator diagnosis result, and the line fault code belongs to the line diagnosis result. Wherein, the battery diagnosis result also includes the battery fault status and the battery fault code description, the starter diagnosis result also includes the starter fault status and the starter fault code description, and the generator diagnosis result also includes the generator's fault status. Fault state and generator fault code description, the line diagnosis result also includes line fault state and line fault code description.

In an embodiment of the present invention, the method further includes:

Present the topology relationship of the startup system through the display interface of the detection device;

Based on the topological relationship, a fault state of the starting system is presented, and the fault state of the starting system includes at least one of the fault states of the battery, the starter and the generator, the number of fault codes, and the location of the line fault.

Please refer to FIG. 8a and FIG. 8b together. FIG. 8a is a schematic diagram of a circuit test provided by an embodiment of the present invention; FIG. 8b is a schematic diagram of a generator test provided by an embodiment of the present invention;

As shown in FIG. 8a, the topological relationship of the starting system is presented through the display interface of the detection device, and the topological relationship of the starting system includes the relative positional relationship and connection relationship of the battery, the starter and the generator of the starting system , wherein the relative positional relationship and connection relationship of the battery, the starter and the generator are not limited to the relationship shown in FIG. 8a or FIG. 8b, and there may be other positional relationships and connection relationships, which are not limited here.

Based on the topological relationship, a fault state of the starting system is presented, and the fault state of the starting system includes at least one of the fault states of the battery, the starter and the generator, the number of fault codes, and the position of the line fault, wherein, The fault state includes normal or fault, and the line fault is identified by the topological relationship of the battery, the starter and the generator, for example, on the connection line of the topological relationship of the battery, the starter and the generator. Different colors, or, on the connection lines of the topological relationship between the battery, the starter and the generator, identify the fault signs.

Wherein, the method further includes: acquiring the fault code description corresponding to the fault code, for example, by clicking on the icon corresponding to the fault code on the display interface of the detection device, generating a fault code description instruction, so as to obtain the fault code description instruction. The corresponding fault code description of the fault code.

As shown in Figure 8b, the fault status of the shown generator is fault, and the number of fault codes is 6.

The connection method and installation position of the startup system are displayed in the form of a topology diagram through an interface, which makes the display of fault causes and results intuitive and easy for users to understand.

Step S40: Generate a health assessment report of the vehicle according to the battery health degree and the diagnostic measurement result.

Wherein, the health assessment report of the vehicle includes at least one of remaining battery mileage, battery health, battery load status, battery usage mileage, and last battery usage mileage.

Specifically, the diagnostic measurement results include: the current battery mileage and the last battery mileage, and the generation of the vehicle health assessment report includes:

Determine the estimated remaining mileage according to the mileage used by the last battery and the current mileage used by the battery;

Wherein, the estimated remaining mileage = the mileage used by the last battery - the current mileage used by the battery. It is understandable that the calculation of the estimated remaining mileage is based on the user's usage habits for reference, that is, based on The overall usage time of the former battery and the latter battery used by the user is about the same.

The remaining battery mileage is determined according to the battery health degree and the estimated remaining mileage, combined with a preset health degree threshold.

Wherein, determining the remaining battery mileage according to the battery health degree and the estimated remaining mileage in combination with a preset health degree threshold includes:

Remaining battery mileage = ((battery health - preset health threshold) * mileage used by the last battery) + (mileage used by the previous battery - current battery mileage))/2;

For example: the preset health threshold is set to 80%, then the remaining battery mileage=((battery health-80%)*the mileage used by the last battery)+(the mileage used by the last battery- The current mileage used by the battery))/2, it can be understood that the mileage used by the previous battery is the total mileage used by the previous battery.

In an embodiment of the present invention, the method further includes:

If the current mileage used by the battery is greater than the mileage used by the previous battery, the remaining mileage of the battery is determined according to the battery health, the preset health threshold, and the current battery mileage.

Specifically, the remaining battery mileage=(battery health degree-preset health degree threshold)*current battery usage mileage.

In an embodiment of the present invention, the diagnostic measurement result includes: a battery load state, and the generating a health assessment report of the vehicle includes:

According to the time proportion of the battery load state in the preset load threshold range, combined with the preset time proportion threshold, the battery usage habit of the storage battery is evaluated, and the battery usage habit includes excessive use, normal use, and over-full use.

Specifically, the preset load threshold range includes a first load threshold range, a second load threshold range and a third load threshold range, the first load threshold range is smaller than the second load threshold range, the second load threshold range The threshold range is smaller than the third load threshold range, the preset time proportional threshold includes a first time proportional threshold, a second time proportional threshold and a third time proportional threshold, wherein the first time proportional threshold is smaller than the first time proportional threshold. Two time ratio thresholds, where the second time ratio threshold is smaller than the third time ratio threshold, and evaluating the battery usage habit of the battery according to the time ratio when the battery load state is within a preset load threshold range includes:

If the time proportion in which the battery load state is in the first load threshold range is greater than the first time proportion threshold, determining that the use habit of the battery is excessive use;

If the time proportion of the battery load state in the second load threshold range is greater than the second time proportion threshold, determining that the usage habit of the battery is normal usage;

If the time proportion when the battery load state is in the third load threshold range is greater than the third time proportion threshold, it is determined that the usage habit of the battery is over-full usage.

For example: the first load threshold range is [0, 60%), the second load threshold range is [60%, 80%), the third load threshold range is [80%, 100%], so The first time proportion threshold is 20%, the second time proportion threshold is 40%, and the third time proportion threshold is 80%.

The time ratio is the ratio of the time occupied by the battery load state in a certain load threshold range within the preset time period to the time in the preset time period.

For example: if the proportion of the time when the battery load state is in [0, 60%) is greater than 20%, it is determined that the usage habit of the battery is excessive use, and the user is prompted to perform charge and discharge maintenance of the battery to improve battery life ;

If the proportion of time when the battery load state is in [60%, 80%) is greater than 40%, it is determined that the usage habit of the battery is normal use;

If the proportion of time when the battery load state is in [80%, 100%] is greater than 80%, it is determined that the usage habit of the battery is over-full, and the user is prompted that the battery is over-full, and the battery is properly discharged.

In an embodiment of the present invention, the method further includes:

If the time proportion of the battery load state in the second load threshold range is greater than the second time proportion threshold and less than the third time proportion threshold, the user is prompted to perform charging and maintenance appropriately, if the battery load state is within the second load threshold When the time ratio of the range is greater than the third time ratio threshold, the user is prompted that the battery is in a normal state. At this time, the user is prompted to perform proper charging and maintenance.

In the embodiment of the present invention, the health assessment report of the vehicle further includes maintenance advice, and the generating the health assessment report of the vehicle includes:

If the battery health degree is lower than the first battery health degree threshold, the maintenance recommendation is to recommend battery replacement;

If the battery health degree is higher than the first battery health degree threshold but lower than the second battery health degree threshold, the maintenance recommendation is to recommend maintenance after the first time period;

If the battery health degree is higher than the second battery health degree threshold, the maintenance suggestion is to recommend maintenance after a second time period, wherein the second time period is greater than the first time period.

In this embodiment of the present invention, the first battery health threshold is 80%, the second battery health threshold is 85%, the first time period is 2-3 months, and the second time period 4-6 months, for example: if the battery health is higher than 80%, but lower than 85%, the maintenance recommendation is to recommend maintenance after 2-3 months; if the battery health is higher than 85%, then the maintenance recommendation is 4-6 months after maintenance. Through a simpler and more intuitive health report, non-professionals can also understand the test results and how to carry out battery maintenance;

In the embodiment of the present invention, by combining the two characteristics of the electrical characteristic detection and diagnosis of the starting system, a comprehensive solution for the starting system is provided, the fault of the starting system is more comprehensively evaluated, and the accuracy and comprehensiveness of the judgment are improved. Reduced misjudgments and missed judgments.

Please refer to FIG. 9 again, FIG. 9 is a schematic diagram of a detection process provided by an embodiment of the present invention;

As shown in Figure 9, the detection process includes:

Step S91: conductance test;

Specifically, the battery detector in the detection device is electrically connected to the battery by connecting the battery detection clamp, and the electrical parameter of the battery is measured by the conductometric method to determine the state of health of the battery, wherein the electrical parameter Including voltage, current, internal resistance, CCA value, etc.

Step S92: diagnostic measurement;

Specifically, the diagnostic instrument in the detection device is connected to the electronic control unit through a hardware communication interface, and sends a diagnostic command to the electronic control unit in the vehicle to obtain a diagnostic measurement result. Wherein, the diagnosis command includes at least one of a starter diagnosis command, a generator diagnosis command, a battery diagnosis command and a line diagnosis command.

Step S93: determine the conductance test result;

Specifically, the conductance test results include battery test results, starter test results, generator test results, and line test results, wherein the battery test results include at least one of battery health, battery state of charge, voltage, and CCA value. One.

Step S94: determine the diagnostic measurement result;

Specifically, the diagnosis measurement results include battery diagnosis results, starter diagnosis results, generator diagnosis results, and line diagnosis results, and the battery diagnosis results include battery load status, current battery mileage, and last battery mileage. , fault code, battery history status, battery mileage, and at least one of the mileage used by a battery.

Step S95: Output a health assessment report according to the conductance test result and the diagnostic measurement result.

Specifically, the health assessment report includes the remaining mileage of the battery, and generating the health assessment report of the vehicle includes: determining the estimated remaining mileage according to the mileage used by the last battery and the current mileage used by the battery ; According to the battery health and the estimated remaining mileage, combined with a preset health threshold, determine the battery remaining mileage.

Specifically, the health evaluation report further includes battery usage habits, and the generating the health evaluation report of the vehicle includes:

According to the time proportion of the battery load state in the preset load threshold range, combined with the preset time proportion threshold, the battery usage habit of the storage battery is evaluated, and the battery usage habit includes excessive use, normal use, and over-full use.

Specifically, the health assessment report of the vehicle further includes maintenance suggestions, and the generating the health assessment report of the vehicle includes:

If the battery health degree is lower than the first battery health degree threshold, the maintenance recommendation is to recommend battery replacement;

If the battery health degree is higher than the first battery health degree threshold but lower than the second battery health degree threshold, the maintenance recommendation is to recommend maintenance after the first time period;

If the battery health degree is higher than the second battery health degree threshold, the maintenance suggestion is to recommend maintenance after a second time period, wherein the second time period is greater than the first time period.

In an embodiment of the present invention, a vehicle detection method is provided, which is applied to a detection device. The detection device is connected to a battery in a vehicle through an electrical connector, and the detection device communicates with the vehicle through a hardware communication interface. The electronic control unit of the battery is communicatively connected, and the method includes: determining the CCA value of the battery according to the internal resistance of the battery; determining the battery health of the battery according to the CCA value; The control unit sends a diagnosis command to obtain a diagnosis measurement result, the diagnosis measurement result includes at least one of the battery load status, the current battery usage mileage and the last battery usage mileage; according to the battery health and the diagnosis Measure the results, and generate a health assessment report of the vehicle. By combining electrical characteristic detection and diagnostic detection, the present invention can solve the problem of misjudgment in the fault detection of the current vehicle starting system, and improve the accuracy of fault detection.

Please refer to FIG. 10 again. FIG. 10 is a schematic structural diagram of a vehicle detection device according to an embodiment of the present invention;

As shown in FIG. 10 , the detection device 101 of the vehicle is applied to a battery detection device. The battery detection device is connected to the battery in the vehicle through an electrical connector, and the battery detection device is connected to the vehicle through a hardware communication interface. The electronic control unit communication connection, the device includes:

The CCA value unit 1011 is configured to determine the CCA value of the battery according to the internal resistance of the battery;

a battery health degree unit 1012, configured to determine the battery health degree of the storage battery according to the CCA value;

A diagnostic measurement result unit 1013 for sending a diagnostic command to the electronic control unit in the vehicle to obtain diagnostic measurement results, the diagnostic measurement results including battery load status, current battery usage mileage, and last battery usage mileage at least one of;

A health assessment report unit 1014 is configured to generate a health assessment report of the vehicle according to the battery health degree and the diagnostic measurement result.

Please refer to FIG. 11 again, FIG. 11 is a schematic structural diagram of a detection device provided by an embodiment of the present invention; wherein, the detection device is connected to a battery in a vehicle through an electrical connector, and the detection device is connected to a hardware communication interface through a hardware communication interface. An electronic control unit in the vehicle is communicatively connected.

As shown in FIG. 11 , the detection device 110 includes a battery measurement module 112 , a control module 111 and a diagnosis measurement module 113 , wherein the battery measurement module 112 and the diagnosis measurement module 113 are respectively connected to the control module 111 .

Specifically, the battery measurement module 112 is connected to the battery in the vehicle through an electrical connector, and is used to measure the conductance of the vehicle to obtain a conductance measurement result, where the conductance measurement result includes the battery health. In the embodiment of the present invention, the battery measurement module 112 includes a battery tester, and the electrical connector includes a DLC connector.

Specifically, the diagnostic measurement module 113 is communicatively connected to the electronic control unit in the vehicle through a hardware communication interface, and is used to send a diagnostic command to the electronic control unit in the vehicle to obtain a diagnostic measurement result, the diagnostic measurement The results include at least one of battery load status, current battery usage mileage, and last battery usage mileage. In this embodiment of the present invention, the diagnostic measurement module includes a diagnostic instrument, and the hardware communication interface includes an OBD interface.

Specifically, the control module 111 is connected to the battery measurement module 112 and the diagnosis measurement module 113, and is used to control the working process of the battery measurement module 112 and the diagnosis measurement module 113, wherein the control module includes:

at least one processor; and

a memory communicatively coupled to the at least one processor; wherein,

the memory stores instructions executable by the at least one processor, the instructions are executed by the at least one processor, so that the at least one processor can execute the vehicle detection method according to the above embodiment, Including: determining the CCA value of the battery according to the internal resistance of the battery; determining the battery health of the battery according to the CCA value; sending a diagnostic command to an electronic control unit in the vehicle to obtain a diagnostic measurement As a result, the diagnostic measurements include at least one of battery load status, current battery usage mileage, and last battery usage mileage; and a health assessment of the vehicle is generated based on the battery health and the diagnostic measurements Report.

In an embodiment of the present invention, by providing a vehicle detection device, including a battery measurement module, a diagnosis measurement module, and a control module, wherein the battery measurement module is used to measure the conductance of the vehicle to obtain the conductance measurement result, The conductance measurement results include battery health; the diagnosis measurement module is configured to send a diagnosis command to an electronic control unit in the vehicle to obtain diagnosis measurement results, the diagnosis measurement results including battery load status, current battery usage at least one of the mileage and the mileage used by the last battery; the control module is connected to the battery measurement module and the diagnosis measurement module, and is used to control the working process of the battery measurement module and the diagnosis measurement module, and measure the battery through the battery measurement module. The module obtains the conductance measurement results, and obtains the diagnosis measurement results through the diagnosis measurement module, so as to combine the electrical characteristics of the starting system and the diagnosis results, so as to solve the problem of misjudgment in the fault detection of the current automobile starting system, and improve the accuracy of fault detection.

Please refer to FIG. 12. FIG. 12 is a schematic diagram of a hardware structure of another detection device provided by an embodiment of the present invention;

As shown in FIG. 12 , the detection device 120 includes but is not limited to: a radio frequency unit 121 , a network module 122 , an audio output unit 123 , an input unit 124 , a sensor 125 , a display unit 126 , a user input unit 127 , an interface unit 128 , and a memory 129 , a processor 1210, a power supply 1211 and other components, the detection device further includes a camera. Those skilled in the art can understand that the structure of the detection device shown in FIG. 12 does not constitute a limitation on the detection device, and the detection device may include more or less components than those shown in the figure, or combine some components, or different Component placement. In this embodiment of the present invention, the detection devices include, but are not limited to, televisions, mobile phones, tablet computers, notebook computers, handheld computers, vehicle-mounted terminals, wearable devices, and pedometers.

The processor 1210 is configured to determine the CCA value of the battery according to the internal resistance of the battery; determine the battery health of the battery according to the CCA value; send a diagnosis command to the electronic control unit in the vehicle, to obtain a diagnostic measurement result, the diagnostic measurement result including at least one of battery load status, current battery usage mileage, and last battery usage mileage; generating the battery health degree and the diagnostic measurement result according to the Vehicle health assessment report.

In the embodiment of the present invention, by combining electrical characteristic detection and diagnostic detection, the present invention can solve the problem of misjudgment in the fault detection of the current automobile starting system, and improve the accuracy of fault detection.

It should be understood that, in this embodiment of the present invention, the radio frequency unit 121 can be used for receiving and sending signals during sending and receiving of information or during a call. Specifically, after receiving the downlink data from the base station, it is processed by the processor 1210; The uplink data is sent to the base station. Generally, the radio frequency unit 121 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 121 can also communicate with the network and other devices through a wireless communication system.

The detection device 120 provides the user with wireless broadband Internet access through the network module 122, such as helping the user to send and receive emails, browse web pages, access streaming media, and the like.

The audio output unit 123 may convert audio data received by the radio frequency unit 121 or the network module 122 or stored in the memory 129 into audio signals and output as sound. Also, the audio output unit 123 may also provide audio output related to a specific function performed by the detection device 120 (eg, call signal reception sound, message reception sound, etc.). The audio output unit 123 includes a speaker, a buzzer, a receiver, and the like.

The input unit 124 is used to receive audio or video signals. The input unit 124 may include a graphics processor (Graphics Processing Unit, GPU) 1241 and a microphone 1242, and the graphics processor 1241 targets still pictures or videos obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode image is processed. The processed image frames may be displayed on the display unit 126 . The image frames processed by the graphics processor 1241 may be stored in the memory 129 (or other storage medium) or transmitted via the radio frequency unit 121 or the network module 122 . The microphone 1242 can receive sound and can process such sound into audio data. The processed audio data can be converted into a format that can be transmitted to a mobile communication base station via the radio frequency unit 121 for output in the case of a telephone call mode.

The detection device 120 also includes at least one sensor 125, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor and a proximity sensor, wherein the ambient light sensor can adjust the brightness of the display panel 1261 according to the brightness of the ambient light, and the proximity sensor can turn off the display panel 1261 and the proximity sensor when the detection device 120 is moved to the ear. / or backlight. As a kind of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in all directions (usually three axes), and can detect the magnitude and direction of gravity when stationary, which can be used to identify and detect the posture of the device (such as horizontal and vertical screen switching, related games , magnetometer attitude calibration), vibration recognition related functions (such as pedometer, tapping), etc.; the sensor 125 may also include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, Infrared sensors, etc., are not repeated here.

The display unit 126 is used to display information input by the user or information provided to the user. The display unit 126 may include a display panel 1261, and the display panel 1261 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 127 may be used to receive input numerical or character information, and generate key signal input related to user settings and function control of the detection device. Specifically, the user input unit 127 includes a touch panel 1271 and other input devices 1272 . The touch panel 1271, also known as the touch screen, can collect the user's touch operations on or near it (such as the user's finger, stylus, etc., any suitable object or attachment on or near the touch panel 1271). operate). The touch panel 1271 may include two parts, a touch detection device and a touch controller. Among them, the touch detection device detects the user's touch orientation, detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into contact coordinates, and then sends it to the touch controller. To the processor 1210, the command sent by the processor 1210 is received and executed. In addition, the touch panel 1271 can be realized by various types of resistive, capacitive, infrared, and surface acoustic waves. In addition to the touch panel 1271 , the user input unit 127 may also include other input devices 1272 . Specifically, other input devices 1272 may include, but are not limited to, physical keyboards, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, and joysticks, which are not described herein again.

Further, the touch panel 1271 can be covered on the display panel 1261. When the touch panel 1271 detects a touch operation on or near it, it transmits it to the processor 1210 to determine the type of the touch event, and then the processor 1210 determines the type of the touch event according to the touch The type of event provides a corresponding visual output on display panel 1261. Although in FIG. 12 , the touch panel 1271 and the display panel 1261 are used as two independent components to realize the input and output functions of the detection device, but in some embodiments, the touch panel 1271 and the display panel 1261 can be integrated The input and output functions of the detection device are implemented, which is not specifically limited here.

The interface unit 128 is an interface for connecting an external device to the detection device 120 . For example, external devices may include wired or wireless headset ports, external power (or battery charger) ports, wired or wireless data ports, memory card ports, ports for connecting devices with identification modules, audio input/output (I/O) ports, video I/O ports, headphone ports, and more. The interface unit 128 may be used to receive input (eg, data information, power, etc.) from external devices and transmit the received input to one or more elements within the detection device 120 or may be used between the detection device 120 and external Transfer data between devices.

The memory 129 may be used to store software programs as well as various data. The memory 129 may mainly include a stored program area and a stored data area, wherein the stored program area may store an application program 1291 required for at least one function (such as a sound playback function, an image playback function, etc.) and an operating system 1292, etc.; the storage data area may Stores data (such as audio data, phonebook, etc.) created according to the use of the mobile phone, and the like. Additionally, memory 129 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 1210 is the control center of the detection device, uses various interfaces and lines to connect various parts of the entire detection device, runs or executes the software programs and/or modules stored in the memory 129, and calls the data stored in the memory 129. , perform various functions of the testing equipment and process data, so as to monitor the testing equipment as a whole. The processor 1210 may include one or more processing units; preferably, the processor 1210 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs, etc., and the modem The processor mainly handles wireless communication. It can be understood that, the above-mentioned modulation and demodulation processor may not be integrated into the processor 1210.

The detection device 120 may also include a power supply 1211 (such as a battery) for supplying power to various components. Preferably, the power supply 1211 may be logically connected to the processor 1210 through a power management system, so as to manage charging, discharging, and power consumption management through the power management system and other functions.

In addition, the detection device 120 includes some unshown functional modules, which will not be repeated here.

Preferably, an embodiment of the present invention further provides a detection device, including a processor 1210 , a memory 129 , a computer program stored in the memory 129 and executable on the processor 1210 , when the computer program is executed by the processor 1210 Various processes of the above embodiments of the vehicle detection method are implemented, and the same technical effect can be achieved. To avoid repetition, details are not repeated here.

The detection device 120 in the embodiment of the present invention exists in various forms, including but not limited to:

(1) Battery tester refers to an instrument that quickly tests various types of batteries (groups) such as lithium-ion batteries, nickel-hydrogen batteries, and polymer batteries. Such as: mobile phone battery tester, walkie-talkie battery tester, notebook battery tester, etc., which are widely used in the production line production testing of various battery manufacturers. The common battery testers are: battery voltage internal resistance tester, finished battery comprehensive tester, Battery capacity tester, lithium battery protection board tester, battery voltage sorter.

(2) Diagnostic instruments, including automobile fault diagnostic instruments, which are vehicle fault self-test terminals, and automobile fault diagnostic instruments (also known as automobile decoders) are portable intelligent automobile fault self-test instruments used to detect automobile faults. It can be used to quickly read the fault in the electronic control system of the car, and display the fault information through the liquid crystal display screen, and quickly find out the location and cause of the fault.

(3) Mobile communication equipment: This type of equipment is characterized by having mobile communication functions, and its main goal is to provide voice and data communication. Such testing devices include: smart phones (eg iPhone), multimedia phones, feature phones, and low-end phones.

(4) Mobile personal computer equipment: This type of equipment belongs to the category of personal computers, has computing and processing functions, and generally has the characteristics of mobile Internet access. Such detection devices include: PDAs, MIDs, and UMPC devices, such as iPads.

(5) Portable entertainment equipment: This type of equipment can display and play video content, and generally has the characteristics of mobile Internet access. Such devices include: video players, handheld game consoles, as well as smart toys and portable car navigation devices.

(6) Other electronic equipment with video playback function and Internet access function.

Embodiments of the present invention further provide a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by one or more processors, each process of the foregoing vehicle detection method embodiment is implemented, and The same technical effect can be achieved, and in order to avoid repetition, details are not repeated here. Wherein, the computer-readable storage medium, such as read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk, etc.

It should be noted that, herein, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements, It also includes other elements not expressly listed or inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

The apparatus or device embodiments described above are merely illustrative, wherein the unit modules described as separate components may or may not be physically separated, and components shown as modular units may or may not be physical units , that is, it can be located in one place, or it can be distributed to multiple network module units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

From the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general hardware platform, and of course hardware can also be used, but in many cases the former is better implementation. Based on this understanding, the technical solutions of the present invention can be embodied in the form of software products in essence or the parts that make contributions to the prior art, and the computer software products are stored in a storage medium (such as ROM/RAM, magnetic disk, CD-ROM), including several instructions to make a terminal (which may be a mobile terminal, a personal computer, a server, or a network device, etc.) execute the methods described in various embodiments of the present invention or some parts of the embodiments.

Finally, it should be noted that the embodiments described above in conjunction with the accompanying drawings are only used to illustrate the technical solutions of the present invention, and the present invention is not limited to the above-mentioned specific embodiments, which are merely illustrative rather than limiting. Under the idea of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above , for the sake of brevity, they are not provided in the details; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it is still possible to modify the technical solutions described in the foregoing embodiments, or Equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims (11)

A vehicle detection method, characterized in that it is applied to a detection device, the detection device is connected to a battery in a vehicle through an electrical connector, and the detection device communicates with an electronic control unit in the vehicle through a hardware communication interface connection, the method includes: Determine the CCA value of the battery according to the internal resistance of the battery; determining the battery health of the storage battery according to the CCA value; sending a diagnostic command to an electronic control unit in the vehicle to obtain diagnostic measurements including at least one of battery load status, current battery mileage, and last battery mileage; A health assessment report for the vehicle is generated based on the battery health and the diagnostic measurements. The method of claim 1, wherein the sending a diagnostic command to an electronic control unit in the vehicle to obtain a diagnostic measurement comprises: Obtain vehicle information of the vehicle, where the vehicle information includes VIN information and MMY information; generating a diagnosis command according to the vehicle information; A diagnostic command is sent to an electronic control unit in the vehicle to obtain diagnostic measurements, the diagnostic measurements also including trouble codes. The method according to claim 2, wherein the vehicle includes a starting system, the starting system includes a battery, a starter, and a generator, and the fault codes include battery fault codes, starter fault codes, and generator faults. code and line trouble code, and the health assessment report of the vehicle further includes at least one of the battery trouble code, the starter trouble code, the generator trouble code and the line trouble code. The method according to claim 3, wherein the method further comprises: Present the topology relationship of the startup system through the display interface of the detection device; Based on the topological relationship, a fault state of the starting system is presented, and the fault state of the starting system includes at least one of the fault states of the battery, the starter and the generator, the number of fault codes, and the location of the line fault. The method according to claim 1, wherein the health assessment report of the vehicle includes at least one of remaining battery mileage, battery health, battery load status, battery usage mileage, and last battery usage mileage . The method of claim 1, wherein the diagnostic measurement results include: current battery mileage and last battery mileage, and the generating a health assessment report for the vehicle includes: Determine the estimated remaining mileage according to the mileage used by the last battery and the current mileage used by the battery; The remaining battery mileage is determined according to the battery health degree and the estimated remaining mileage, combined with a preset health degree threshold. The method of claim 1, wherein the diagnostic measurement result comprises: a battery load state, and the generating a health assessment report of the vehicle comprises: According to the time proportion of the battery load state in the preset load threshold range, combined with the preset time proportion threshold, the battery usage habit of the storage battery is evaluated, and the battery usage habit includes excessive use, normal use, and over-full use. The method according to claim 7, wherein the preset load threshold range includes a first load threshold range, a second load threshold range and a third load threshold range, and the first load threshold range is smaller than the first load threshold range. Two load threshold ranges, the second load threshold range is smaller than the third load threshold range, and the preset time proportional threshold includes a first time proportional threshold, a second time proportional threshold and a third time proportional threshold, wherein the the first time proportion threshold is less than the second time proportion threshold, the second time proportion threshold is less than the third time proportion threshold, and the evaluation is based on the time proportion when the battery load state is within a preset load threshold range The battery usage habits of the storage battery include: If the time proportion of the battery load state in the first load threshold range is greater than the first time proportion threshold, it is determined that the use habit of the battery is excessive use; If the time proportion in which the battery load state is in the second load threshold range is greater than the second time proportion threshold, it is determined that the use habit of the battery is normal use; If the time proportion when the battery load state is in the third load threshold range is greater than the third time proportion threshold, it is determined that the usage habit of the battery is over-full usage. The method according to claim 1, wherein the health assessment report of the vehicle further includes maintenance recommendations, and the generating the health assessment report of the vehicle includes: If the battery health degree is lower than the first battery health degree threshold, the maintenance recommendation is to recommend battery replacement; If the battery health degree is higher than the first battery health degree threshold but lower than the second battery health degree threshold, the maintenance recommendation is to recommend maintenance after the first time period; If the battery health is higher than the second battery health threshold, the maintenance recommendation is to recommend maintenance after a second time period, where the second time period is greater than the first time period. A detection device for a vehicle is characterized in that it is applied to a battery detection device, the battery detection device is connected to a battery in a vehicle through an electrical connector, and the battery detection device is connected to an electronic device in the vehicle through a hardware communication interface The control unit is communicatively connected, and the device includes: The CCA value unit is used to determine the CCA value of the battery according to the internal resistance of the battery; a battery health degree unit, configured to determine the battery health degree of the storage battery according to the CCA value; A diagnostic measurement result unit for sending a diagnostic command to an electronic control unit in the vehicle to obtain diagnostic measurement results, the diagnostic measurement results including battery load status, current battery usage mileage, and last battery usage mileage at least one of; A health assessment report unit, configured to generate a health assessment report of the vehicle according to the battery health degree and the diagnostic measurement result. A detection device, characterized in that the detection device is connected to a battery in a vehicle through an electrical connector, and the detection device is communicatively connected to an electronic control unit in the vehicle through a hardware communication interface, and the battery detection device include: a battery measurement module, used for conducting conductance measurement on the vehicle to obtain conductance measurement results, where the conductance measurement results include battery health; A diagnostic measurement module for sending a diagnostic command to an electronic control unit in the vehicle to obtain diagnostic measurement results, the diagnostic measurement results including battery load status, current battery usage mileage, and last battery usage mileage at least one; A control module, connected to the battery measurement module and the diagnostic measurement module, the control module includes: at least one processor; and a memory communicatively coupled to the at least one processor; wherein, The memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform the execution of any of claims 1-9 vehicle detection method.

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