CN111781505B

CN111781505B - Vehicle detection method and device and detection equipment

Info

Publication number: CN111781505B
Application number: CN202010671354.4A
Authority: CN
Inventors: 瞿松松
Original assignee: Autel Intelligent Technology Corp Ltd
Current assignee: Autel Intelligent Technology Corp Ltd
Priority date: 2020-07-13
Filing date: 2020-07-13
Publication date: 2022-10-11
Anticipated expiration: 2040-07-13
Also published as: WO2022012488A1; CN111781505A

Abstract

The embodiment of the invention relates to the technical field of automotive electronics, and discloses a vehicle detection method, which is applied to detection equipment, wherein the detection equipment is connected with a storage battery in a vehicle through an electric connector, and is in communication connection with an electronic control unit in the vehicle through a hardware communication interface, and the method comprises the following steps: determining a CCA value of the storage battery according to the internal resistance of the storage battery; determining the battery health degree of the storage battery according to the CCA value; sending a diagnostic command to an electronic control unit in the vehicle to obtain a diagnostic measurement including at least one of a battery load status, a current battery use mileage, and a last battery use mileage; a health assessment report for the vehicle is generated based on the battery health and the diagnostic measurements. By combining the electrical characteristic detection and the diagnosis detection, the invention can solve the problem of misjudgment of the fault detection of the current automobile starting system and improve the accuracy of the fault detection.

Description

Vehicle detection method and device and detection equipment

Technical Field

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

Background

Due to the advanced technology, more and more electronic units of the automobile are provided, and the battery belongs to a core component on the automobile, so that the working state of each automobile electrical appliance is influenced; the battery, the starter and the generator together form a starting system of the automobile, and when any one component of the starting system is in a problem, the automobile cannot be started and is anchored in a half way, so that the fault detection and the fault prediction of the starting system of the automobile become more and more important.

The traditional battery detector judges whether the battery, the starter and the generator are good or not only by detecting the electrical characteristics of the battery, and because the signal difference between the abnormal battery and the good battery is extremely small, especially the battery state measurement at different moments has difference, the measurement accuracy is not high, erroneous judgment is easy to generate, the good battery is detected as a bad battery, and the bad battery cannot be detected. Generally, the diagnostic instrument can only interact with the ECU through the DLC connector to acquire the SOC state of the battery, and the condition of the battery can not be accurately judged, so that the fault detection of the automobile starting system has the problem of misjudgment.

In view of the foregoing, there is a need for improvement in the art.

Disclosure of Invention

The embodiment of the invention aims to provide a vehicle detection method, a vehicle detection device and vehicle detection equipment, which solve the problem of misjudgment in fault detection of the conventional automobile starting system and improve the accuracy of fault detection.

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

in a first aspect, an embodiment of the present invention provides a detection method for a vehicle, which is applied to a detection device, the detection device is connected to a storage battery in the vehicle through an electrical connector, and the detection device is connected to an electronic control unit in the vehicle through a hardware communication interface in a communication manner, and the method includes:

determining a CCA value of the storage battery according to the internal resistance of the storage battery;

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

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

generating a health assessment report for the vehicle based on the battery health and the diagnostic measurement.

In some embodiments, said sending a diagnostic command to an electronic control unit in said vehicle to obtain a diagnostic measurement comprises:

acquiring vehicle information of the vehicle, wherein the vehicle information comprises VIN information and MMY information;

generating a diagnosis command according to the vehicle information;

sending a diagnostic command to an electronic control unit in the vehicle to obtain a diagnostic measurement, the diagnostic measurement further including a fault code.

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

In some embodiments, the method further comprises:

presenting the topological relation of the starting system through a display interface of the detection equipment;

and presenting the fault state of the starting system based on the topological relation, wherein the fault state of the starting system comprises at least one of the fault states of a storage battery, a starter and a generator, the number of fault codes and the position of line fault.

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

In some embodiments, the diagnostic measurements include: generating a health assessment report for the vehicle, including:

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

and determining the remaining driving mileage of the battery according to the health degree of the battery and the estimated remaining driving mileage by combining a preset health degree threshold value.

In some embodiments, the diagnostic measurements include: a battery load state, the generating a health assessment report for the vehicle, comprising:

and evaluating the battery use habits of the storage battery by combining a preset time proportion threshold according to the time proportion of the battery load state within the preset load threshold range, wherein the battery use habits comprise over-shortage use, normal use and over-full use.

In some embodiments, the pre-set 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 is smaller than the third load threshold range, the pre-set time scale threshold includes a first time scale threshold, a second time scale threshold, and a third time scale threshold, wherein the first time scale threshold is smaller than the second time scale threshold, the second time scale threshold is smaller than the third time scale threshold, and the evaluating the battery usage of the battery according to the time scale of the battery load state in the pre-set load threshold range includes:

if the time proportion of the battery load state in the first load threshold range is larger than a first time proportion threshold, determining that the use habit of the storage battery is over-insufficient use;

if the time proportion of the battery load state in the second load threshold range is larger than a second time proportion threshold, determining that the use habit of the storage battery is normal use;

and if the time proportion of the battery load state in the third load threshold range is greater than a third time proportion threshold, determining that the use habit of the storage battery is over-full use.

In some embodiments, the vehicle health assessment report further comprises a maintenance recommendation, and the generating the vehicle health assessment report comprises:

if the battery health degree is lower than a first battery health degree threshold value, the maintenance suggestion is that the storage battery is recommended to be replaced;

if the battery health is above a first battery health threshold but below a second battery health threshold, the service recommendation is to recommend service after a first time period;

and if the battery health degree is higher than a second battery health degree threshold value, the maintenance suggestion is to suggest 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 detection apparatus for a vehicle, which is applied to a battery detection device, the battery detection device is connected to a storage battery in the vehicle through an electrical connector, and the battery detection device is connected to an electronic control unit in the vehicle through a hardware communication interface in a communication manner, and the apparatus includes:

the CCA value unit is used for determining the CCA value of the storage battery according to the internal resistance of the storage battery;

the battery health degree unit is used for determining the battery health degree of the storage battery according to the CCA value;

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

a health assessment reporting unit for generating a health assessment report of the vehicle based on the battery health and the diagnostic measurement.

In a third aspect, an embodiment of the present invention provides a detection apparatus connected to a storage battery in a vehicle through an electrical connector, and communicatively connected to an electronic control unit in the vehicle through a hardware communication interface, the battery detection apparatus including:

the battery measurement module is used for conducting conductivity measurement on the vehicle to obtain a conductivity measurement result, and the conductivity measurement result comprises battery health degree;

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

a control module connected to the battery measurement module and the diagnostic measurement module, the control module comprising:

at least one processor; and

a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,

the memory stores instructions executable by the at least one processor to enable the at least one processor to perform a method of detecting a vehicle as described above.

In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the detection method of the vehicle as described above.

The embodiment of the invention has the beneficial effects that: in contrast to the prior art, an embodiment of the present invention provides a detection method for a vehicle, which is applied to a detection device, the detection device is connected to a storage battery in the 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 method includes: determining a CCA value of the storage battery according to the internal resistance of the storage battery; determining the battery health degree of the storage battery according to the CCA value; sending a diagnostic command to an electronic control unit in the vehicle to obtain a diagnostic measurement including at least one of a battery load status, a current battery usage mileage, and a previous battery usage mileage; generating a health assessment report for the vehicle based on the battery health and the diagnostic measurement. By combining the electrical characteristic detection and the diagnosis detection, the invention can solve the problem of misjudgment in the fault detection of the conventional automobile starting system and improve the accuracy of the fault detection.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.

Fig. 1 is a schematic structural diagram of a detection system of a vehicle according to an embodiment of the present invention;

FIG. 2 is a schematic flow chart of a vehicle detection method according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a battery detection system according to an embodiment of the present invention;

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

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

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

FIG. 7 is a detailed flowchart of step S30 in FIG. 2;

FIG. 8a is a schematic diagram of a circuit test according to an embodiment of the present invention;

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

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

fig. 10 is a schematic structural diagram of a vehicle detection device according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a detection apparatus according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of another detection apparatus provided in the embodiment of the present invention.

Detailed Description

In order to make the objects, 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 drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

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

In an embodiment of the present invention, the detection device includes an electronic device capable of detecting an automobile, such as a battery detector, a diagnostic device, a smart phone, a Personal Digital Assistant (PDA), a tablet computer, and a smart watch.

Specifically, the following describes embodiments of the present invention in detail by taking an example in which the detection apparatus includes a battery tester and a diagnostic apparatus.

Referring to fig. 1, fig. 1 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 coupled to the vehicle.

The vehicle 200 may 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, so as to coordinate and control the vehicle according to an operation instruction of a driver, etc., and monitor one or more vehicle parameters in real time, thereby ensuring that the vehicle 200 runs reliably and safely.

It is understood that in vehicles of different models or types, the electronic control units are different according to the differences of the structural arrangement and the assumed functions, so that the lists of the electronic control units are different.

The electronic control units in the vehicle are usually connected in a communication manner by means of a bus. Each electronic control unit uses a specific communication protocol. The electronic control unit can communicate on the corresponding automobile bus according to the communication protocol used by the electronic control unit, so as to avoid conflict and improve efficiency. That is, electronic control units using the same communication protocol communicate over a vehicle bus, one corresponding to one communication protocol.

To facilitate routine service 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 may be connected to one or more vehicle buses, and is used to establish communication connection with external devices, so that the hardware communication interface and the vehicle bus complete data interaction and other processes with the electronic control unit.

Among them, the detection apparatus 100 includes a battery tester (battery tester) and a Diagnostic (Diagnostic).

The battery tester may be any type of vehicle diagnostic product, and the battery tester generally determines the quality of the battery and the starting system according to the change of the electrical characteristics by measuring the electrical characteristics of the battery and the starting system of the vehicle, and specifically, the battery tester includes at least one electrical connector, which terminates in a diagnostic connector that matches with the hardware communication interface of the vehicle 10, and the electrical connector includes Kelvin (Kelvin) connector, low frequency circular connector, optical fiber connector, rectangular connector, printed circuit connector, radio frequency connector, and the like, and preferably, the electrical connector in the embodiment of the present invention is a Kelvin connector.

Wherein the diagnostic instrument acquires the state of parts on the vehicle by communicating with an electronic control unit (electronic control unit) to assist in the trouble shooting, and interacts with an Electronic Control Unit (ECU) through a DLC connector to acquire the state of the secondary battery, including the battery load state. Wherein the Electronic Control Unit (ECU) is configured to control a plurality of components of the vehicle, such as: engine, gearbox, vehicle window, door, instrument panel etc.

In actual use, the detection device 100 establishes physical communication connections with various automobile buses in the vehicle through interface modules, such as diagnostic connectors and hardware communication interfaces, and loads an appropriate or paired protocol configuration to realize data interaction with an electronic control system, such as sending detection instructions or receiving detection data.

In the embodiment of the present invention, the vehicle 200 further includes a tire, a steering wheel, a driving motor, and other components, which belong to the prior art and are not described herein again.

Referring to fig. 2, fig. 2 is a schematic flow chart illustrating a vehicle detection method according to an embodiment of the present invention;

as shown in fig. 2, the vehicle detection method is applied to a detection device, the detection device is connected with a storage battery in the vehicle through an electric connector, and the detection device is connected with an electronic control unit in the vehicle through a hardware communication interface in a communication mode, and the method comprises the following steps:

step S10: determining a CCA value of the storage battery according to the internal resistance of the storage battery;

specifically, the detection device includes a battery detector, the battery detector is connected to a storage battery in the vehicle through an electrical connector, and the battery detector determines a CCA value of the storage battery through conductivity measurement, specifically, the battery detector and the storage battery form a battery detection system, specifically, please refer to fig. 3 again, and fig. 3 is a schematic structural diagram of the battery detection system provided in the embodiment of the present invention;

as shown in fig. 3, the battery tester 31 is electrically connected to the battery 32, and is used for measuring an electrical parameter of the battery 32 and determining a state of health of the battery.

The secondary battery 32 is a device that directly converts chemical energy into electric energy and performs recharging through a reversible chemical reaction, i.e., internal active materials are regenerated by external electric energy during charging, electric energy is stored as chemical energy, and chemical energy is converted into electric energy again for output when discharging is required. The battery 32 includes one or more cells, and generally, a rated voltage of one cell is 2V, and the plurality of cells may be connected in series or in parallel, so that the rated voltage of the battery 32 may be 2v,4v, 6V, 8V, 12V, 24V, and so on. For example, a vehicle battery is generally a battery pack in which 6 lead storage cells are connected in series to form a rated voltage of 12V for a small-sized vehicle, or a battery pack in which 12 lead storage cells are connected in series to form a rated voltage of 24V for a large-sized vehicle. It is understood that the rated voltage of the vehicle battery can be designed to other specifications according to actual conditions.

After the storage battery 32 is charged and discharged for multiple times, health problems such as loss, bad cells (damaged cells), insufficient electric quantity and the like can occur, and the vehicle can not run normally, so that the health state of the storage battery 32 can be judged in advance, a user can clearly know the condition of the storage battery 32, and the risk of starting and running is avoided. The state of health of the battery 32 is an index for evaluating the operating capability of the battery 32, and may include, for example, whether or not near scrapping (bad battery), whether or not bad cells occur (bad battery), whether or not good cells are obtained (good battery), or whether or not the amount of electricity is sufficient (insufficient battery), and the like. The state of health of the battery 32 may affect electrical parameters of the battery 32, such as a voltage drop when a cell is broken.

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

Referring to fig. 4 again, fig. 4 is a detailed structural diagram of the battery detection system in fig. 3;

as shown in fig. 4, the battery tester 31 includes a discharge circuit 311, a voltage sampling circuit 312, and a controller 313.

Referring to fig. 5 again, fig. 5 is a detailed structural diagram of the battery detection system in fig. 4;

as shown in fig. 5, the battery tester 31 includes a first connection end 301, a second connection end 302, a third connection end 303, and a fourth connection end 304, where the first connection end 301, the second connection end 302, the third connection end 303, and the fourth connection end 304 are respectively used for connecting 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 storage battery 32, and the third connection end 303 and the fourth connection end 304 are both electrically connected to the negative electrode of the storage battery 32. In some embodiments, the first connection end 301, the second connection end 302, the third connection end 303, and the fourth connection end 304 may also be kelvin connectors, i.e., the battery tester 31 may electrically connect the battery 32 through the kelvin connectors, may eliminate wiring, and may eliminate resistance due to contact connection when current flows through the positive electrode or the negative electrode of the battery 100.

For the discharge circuit 311, the storage battery 32 is electrically connected through the first connection end 301 and the fourth connection end 304, and is used for triggering the storage battery 32 to discharge. When the discharging circuit 311 is in a conducting state, the discharging circuit 311 and the storage battery 32 form a discharging loop to trigger the storage battery 100 to discharge.

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

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

The first terminal of the current sampling circuit 3113 is connected to the controller 313, the second terminal of the current sampling circuit 3113 is connected to the load 3112, and the current sampling circuit 3113 is configured to detect a current in a discharging loop formed by the switch circuit 3111, the load 3112 and the battery 200, that is, a discharging current of the battery 32.

The controller 313 adjusts the switch circuit 3111 according to the magnitude of the discharging current detected by the current sampling circuit 20, so that the battery 32 is discharged under the preset discharging condition, where the preset discharging condition includes a preset duration of discharging the battery 32 according to a preset discharging current.

Referring to fig. 6, fig. 6 is a schematic circuit structure diagram 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, a non-inverting input terminal of the first operational amplifier U1 is connected to the controller 313 (DAC port of the single chip U4), an inverting input terminal of the first operational amplifier U1 is connected to a source of the MOS transistor Q, an output terminal of the first operational amplifier U1 is connected to a gate of the MOS transistor Q, the source of the MOS transistor Q is connected to the first end of the load 3112, and a drain of the MOS transistor Q is connected to the first connection terminal 301. A second end of the load 3112 is connected to the fourth connection terminal 304, and the fourth connection terminal 304 is electrically connected to a negative electrode of the battery 32.

When the MOS transistor Q is turned off, the voltage of the first end 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 negative voltage is input to the inverting input terminal of the first operational amplifier U1. 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 to the gate of the MOS transistor Q, so that a voltage difference V is formed between the gate and the source of the MOS transistor Q _GS . Wherein a magnitude of the first drive signal is related to a magnitude of the voltage signal. Further adjusting the first drive signal by adjusting the voltage signal such that the voltage difference V is _GS When the voltage is higher than 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 battery 32 starts to discharge.

When the MOS transistor Q is turned on, a discharge current flows through the load 3112, a voltage of the first end of the load 3112 is increased, that is, the voltage of the first end of the load 3112 corresponds to a voltage drop value of the load 3112, and 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 the voltage signal and the voltage drop signal are processed by the first operational amplifier U1, a stable second driving signal is output to the gate of the MOS transistor Q. Under the action of the stable second driving signal, the conduction degree of the MOS tube Q is certain, and the channel internal resistance of the MOS tube Q is stable, so that the stability of the discharge current in the discharge loop can be ensured. In addition, the magnitude of the second driving signal is related to the magnitude of the voltage signal emitted by the controller 313, so that a stable discharge current with a corresponding magnitude can be obtained by adjusting the voltage signal emitted by the controller 313.

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

In some embodiments, the current sampling circuit 3113 includes a second operational amplifier U2, a non-inverting input terminal of the second operational amplifier U2 is connected to the first terminal of the load 3112, an inverting input terminal of the second operational amplifier U2 is connected to the second terminal of the load 3112, and an output terminal of the second operational amplifier U2 is connected to the controller. Therefore, the voltage at the first end of the load 3112 is input to the non-inverting end of the second operational amplifier U2, the voltage at the second end of the load 3112 is input to the inverting end of the second operational amplifier U2, the voltage at the two ends of the load 3112 is obtained after being processed by the second operational amplifier U2 and is sent to the controller 313, and the controller 313 can determine the current flowing through the load 3112, namely the discharge current in the discharge loop, according to the resistance value of the load 3112 and the voltage at the two ends of the load 3112.

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 terminal 301, a second end of the diode D1 is connected to the drain of the MOS transistor Q, and the diode D1 is configured to prevent the discharge current from flowing back to the storage battery 32. When the first connection end 301 is connected with the positive electrode of the storage battery 32, the positive electrode of the diode D1 is connected with the first connection end 301, the negative electrode of the diode D1 is connected with the drain electrode of the MOS transistor Q, and by using the one-way conductivity of the diode D1, in the discharge circuit, the discharge current always flows from the positive electrode of the storage battery 32 through the MOS transistor Q and the load 3112, and finally flows back to the negative electrode of the storage battery 32, so that the current is prevented from flowing backwards, and the storage battery 32 is burnt.

The voltage sampling circuit 312 is electrically connected to the battery 32 through the second connection terminal 302 and the third connection terminal 303, and is configured to detect a voltage across the battery 32. When the discharging circuit 311 is in a disconnected state, the voltage across the storage battery 32 collected by the voltage sampling circuit 312 is an open-circuit voltage, when the discharging circuit 311 is in a connected state, the storage battery 32 discharges, and the voltage across the storage battery 32 collected by the voltage sampling circuit 312 is a discharging voltage.

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

The 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, 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 with the non-inverting input end of the first operational amplifier U1, the ADC1 port of the single chip microcomputer U4 is electrically connected with the output end of the second operational amplifier U2, and the ADC2 port of the single chip microcomputer U4 is electrically connected with the output end of the third operational amplifier U3.

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; but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine; or as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other configuration.

In summary, the working process of the battery tester 31 is as follows:

(1) When the discharging circuit 311 is turned off, the storage battery 32 is not discharged, and the third operational amplifier U3 performs signal processing on the voltage across the storage battery 32 to obtain the open-circuit voltage of the storage 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, and at this time, the source voltage of the MOS transistor Q is the cathode voltage of the battery 32. The first operational amplifier U1 performs signal processing on a voltage signal input by a non-inverting input end and a negative voltage input by an inverting input end to obtain a first driving signal, wherein the magnitude of the first driving signal is related to the magnitude of the voltage signal. The first driving signal acts on the grid electrode of the MOS tube Q, so that a voltage difference V is formed between the grid electrode and the source electrode of the MOS tube Q _GS . Further adjusting the first drive signal by adjusting the voltage signal such that the voltage difference V is _GS When the voltage 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 battery 32 starts to discharge.

When the MOS transistor Q is turned on, a discharge current flows through the load 3112, a voltage of the first end of the load 3112 is increased, that is, the voltage of the first end of the load 3112 corresponds to a voltage drop value of the load 3112, and 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 the voltage signal and the voltage drop signal are processed by the first operational amplifier U1, a stable second driving signal is output to the gate of the MOS transistor Q. Under the action of the second stable driving signal, the battery 32 discharges with a stable discharge current, wherein the magnitude of the discharge current is related to the magnitude of the second driving signal, and further, the magnitude of the discharge current is related to the voltage signal input by the controller 313. Thus, the voltage signal may be adjusted such that the battery 32 is discharged at a predetermined discharge current for a predetermined period of time.

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

When the discharge time reaches the preset duration, the voltage signal is stopped being output or adjusted, so that the voltage difference V between the grid and the source of the MOS transistor Q _GS And when the voltage is smaller than the on-state voltage of the MOS tube Q, the MOS tube Q is cut off, the discharging loop of the storage battery 32 is cut off, and the storage battery 32 stops discharging.

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

(4) The single chip microcomputer U4 determines CCA parameters of the storage battery according to the voltage drop value and the preset discharging condition, and determines the health state of the storage battery 32 according to the battery characteristics, the open-circuit voltage, the CCA parameters and a preset mapping relation.

For example: referring to fig. 6, a four-wire kelvin clamp is used to clamp the positive and negative electrodes of the storage battery, the B +/B-loop is a controllable current discharge loop, wherein a diode D1 on the loop is a discharge current backward flow diode, Q is a current-limiting control MOS transistor, U1 is a current magnitude control operational amplifier, R is a current sampling resistor, and U2 is a current signal amplification operational amplifier. The S +/S-loop is a signal acquisition loop, and the voltage signal of the S +/S-reduces the open-circuit voltage at two ends of the storage battery to the range which can be acquired by the ADC of the MCU through the operational amplifier U3. The MCU outputs proper voltage through the DAC interface to cooperate with the operational amplifier U1 to control the conduction degree of the MOS tube Q, so that the discharge current of the B +/B-loop is controlled; the ADC interface of the MCU is used for collecting the open-circuit voltage of S +/S-. Calculating the internal resistance of the battery by measuring the open-circuit voltage of the battery without loading and the loaded voltage when loading is carried out at the two ends of B +/B-and simultaneously measuring the current value I on the R when loading is carried out;

such as: according to a 100Hz frequency: controlling a discharge loop to discharge 1.2A current for 5ms, starting to acquire and store the loaded voltage Va at two ends of S +/S-at the frequency of 0.1ms each time in a time window of 2-4ms, and measuring the current value Ia on R when the load is loaded; closing a discharge loop, continuing for 5ms, starting to acquire and store open-circuit voltage Vo at two ends of S +/S-at the frequency of 0.1ms in a time window of 2-4ms, measuring a current value Ib on R when a load is loaded, and determining the internal resistance Ri = (Vo-Va)/(la-lb), wherein the open-circuit voltage is a no-load voltage. In an embodiment of the present invention, the method further comprises: by performing a plurality of conductance measurements, the average of the loaded voltage Va, the open-circuit voltage Vo and the current values la, lb is determined, for example: and continuously testing for 200 times, accumulating Va, vo, la and lb to obtain an average value, and calculating internal resistance Ri = (Vo-Va)/(la-lb).

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

calculating the conductance of the storage battery according to the internal resistance of the storage battery;

and determining a CCA (Cold Cranking Ampere, CCA) value of the storage battery according to the conductance and the combination of a preset coefficient and a compensation value.

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

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

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

acquiring a nominal CCA value;

and calculating the ratio of the CCA value of the storage battery to the nominal CCA value, and determining the ratio of the CCA value of the storage battery to the nominal CCA value as the battery health degree of the storage battery, wherein the CCA value is a cold start capacity CCA value.

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

In an embodiment of the present invention, the method further comprises: measuring the state of the battery by a conductance method, and obtaining a conductance measurement result, wherein the conductance measurement result comprises a test result of starting a system, such as: the test result of storage battery, generator test result, starter test result, circuit test result, wherein, the test result of storage battery includes: the battery health degree (stateful, SOH), battery load state (stateful, SOC) of battery, the voltage of battery and the CCA value of battery, cold start CCA value promptly, the generator test result includes no-load voltage, on-load voltage, output current, ripple, starter test result includes battery voltage, starting current and activation time, the line test result includes starter voltage drop test result, generator voltage drop test result, other line test results, leakage current test-current clamp result, leakage current test-universal meter result.

The ripple is used for representing whether a signal output by the generator is stable or not, and if the ripple is too large, the signal output by the generator is unstable, and generally, the ripple is too large when the ripple exceeds 200 mV.

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

specifically, the vehicle includes a Battery Management System (BMS), which is referred to as a BMS System for short, and is a System for managing a Battery, and generally has a function of measuring a voltage of the Battery to prevent or avoid abnormal situations such as overdischarge, overcharge, and over-temperature of the Battery. As the technology has been developed, many functions have been gradually added, including functions of SOC estimation, SOH estimation, abnormality warning, abnormality protection, equalization (passive equalization or active equalization), temperature measurement, current measurement, and the like.

In the embodiment of the invention, the BMS is a control system for protecting the use safety of the power battery, constantly monitors the use state of the battery, relieves the inconsistency of the battery pack through necessary measures, and provides guarantee for the use safety of a new energy vehicle.

The topology of BMS hardware is classified into a centralized type and a distributed type. The centralized type battery management system integrates all functions of the battery management system into one controller, is suitable for occasions with small battery pack capacity and fixed module and battery pack types, and can remarkably reduce the system cost. The main control board and the slave control board of the BMS are separated in a distributed mode, even the low-voltage part and the high-voltage part are separated, so that the flexibility of system configuration is improved, and the BMS is suitable for modules and battery packs with different capacities and different specification types.

Specifically, the battery control system comprises a plurality of electronic control units, the detection device comprises a diagnostic instrument, the diagnostic instrument is connected with a DLC connection seat (DLC) through a DLC connector, interacts with each electronic control unit ECU in the vehicle, and sends a diagnostic command to the electronic control units in the vehicle to obtain a diagnostic measurement result, and the diagnostic measurement result comprises at least one of a battery load state, a current battery use mileage and a previous battery use mileage.

Referring back to fig. 7, fig. 7 is a detailed flowchart of step S30 in fig. 2;

as shown in fig. 7, the step S30: sending a diagnostic command to an electronic control unit in the vehicle to obtain a diagnostic measurement, comprising:

step S31: acquiring vehicle information of the vehicle, wherein the vehicle information comprises VIN information and MMY information;

specifically, the vehicle information includes VIN information and MMY information, where the VIN information is a VIN code (VIN), and the MMY information (Make Model Year, MMY) is a manufacturer, a vehicle type, and a Year.

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

according to the vehicle information, for example: manufacturer, year, model, determining corresponding diagnostic commands including at least one of starter diagnostic commands, generator diagnostic commands, battery diagnostic commands, and line diagnostic commands, as shown in table 1 below:

TABLE 1

Step S33: sending a diagnostic command to an electronic control unit in the vehicle to obtain a diagnostic measurement, the diagnostic measurement further including a fault code.

Specifically, a diagnostic command is sent to an electronic control unit in the vehicle, specifically, at least one of a starter diagnostic command, a generator diagnostic command, a battery diagnostic command and a line diagnostic command is sent 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 at least one of a battery load state, a current battery usage mileage and a previous battery usage mileage.

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

06 F1 05 12 03 22 F1 50

06 F1 05 12 03 22 40 A9

06 F1 05 12 03 22 40 AD

06 F1 05 12 03 22 40 B5

06 F1 05 12 03 22 40 C3

it is understood that the diagnosis command is different according to the vehicle information.

In an embodiment of the invention, the diagnostic measurement further comprises a fault code.

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

In the embodiment of the present invention, the diagnosis measurement result includes a battery diagnosis result, a starter diagnosis result, a generator diagnosis result, and a line diagnosis result, wherein the battery fault code belongs to the battery diagnosis result, 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. The battery diagnosis result further comprises a fault state of the battery and a battery fault code description, the starter diagnosis result further comprises a fault state of the starter and a starter fault code description, the generator diagnosis result further comprises a fault state of the generator and a generator fault code description, and the line diagnosis result further comprises a line fault state and a line fault code description.

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

Referring to fig. 8a and fig. 8b together, fig. 8a is a schematic diagram of a circuit test according to an embodiment of the invention; FIG. 8b is a schematic diagram of a generator test provided by an embodiment of the present invention;

as shown in fig. 8a, a topological relation of the starting system is presented through a display interface of the detection device, and the topological relation of the starting system includes a relative positional relation and a connection relation of a battery, a starter and a generator of the starting system, where the relative positional relation and the connection relation of the battery, the starter and the generator are not limited to the relations shown in fig. 8a or fig. 8b, and other positional relations and connection relations may also be provided, which are not limited herein.

Presenting a fault state of the starting system based on the topological relation, wherein the fault state of the starting system comprises at least one of fault states of a storage battery, a starter and a generator, the number of fault codes and the position of a line fault, the fault state comprises normal or fault, and the line fault is identified through the topological relation of the storage battery, the starter and the generator, such as: and identifying different colors on the connecting lines of the topological relations of the storage battery, the starter and the generator, or identifying fault signs on the connecting lines of the topological relations of the storage battery, the starter and the generator.

Wherein the method further comprises: acquiring a fault code description corresponding to the fault code, for example: and clicking an icon corresponding to the fault code on a display interface of the detection equipment to generate a fault code description instruction so as to obtain a fault code description corresponding to the fault code.

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

The connection mode and the installation position of the starting system are displayed in a topological graph mode through one interface, so that the fault reason and the result are displayed visually, and the user can understand conveniently.

Step S40: generating a health assessment report for the vehicle based on the battery health and the diagnostic measurement.

Wherein the vehicle health assessment report includes at least one of remaining battery range, battery health, battery load status, battery mileage used, and mileage used by a previous battery.

Specifically, the diagnostic measurements include: the current and last battery miles used, generating a health assessment report for the vehicle, comprising:

wherein the estimated remaining driving range = mileage used by last battery-mileage used by current battery, it is understood that the estimated remaining driving range is calculated based on the usage habit of the user as a reference, that is, based on the total usage time of the previous battery and the next battery used by the user being approximately the same.

Wherein, according to the battery health degree and the estimated remaining driving mileage, the method determines the remaining driving mileage of the battery by combining a preset health degree threshold value, and comprises the following steps:

battery remaining driving mileage = ((battery health degree-preset health degree threshold value) × mileage used by last battery) + (mileage used by last battery-current battery use mileage))/2;

for example: the preset health threshold is set to 80%, and the remaining driving mileage of the battery = ((battery health-80%) + mileage used by the last battery) + (mileage used by the last battery-current mileage used by the battery))/2, it is understood that the mileage used by the last battery is the total mileage used by the last battery.

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

and if the current battery use mileage is greater than the previous battery use mileage, determining the remaining battery travel mileage according to the battery health degree, a preset health degree threshold value and the current battery use mileage.

Specifically, the remaining driving mileage of the battery = (battery health degree-preset health degree threshold value) × current battery use mileage.

In an embodiment of the invention, the diagnostic measurement comprises: a battery load state, the generating a health assessment report for the vehicle, comprising:

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 is smaller than the third load threshold range, the preset time proportion threshold includes a first time proportion threshold, a second time proportion threshold and a third time proportion threshold, the first time proportion threshold is smaller than the second time proportion threshold, the second time proportion threshold is smaller than the third time proportion threshold, and the evaluation of the battery usage habit of the storage battery according to the time proportion of the battery load state in the preset load threshold range includes:

if the time proportion of the battery load state in the first load threshold range is larger than a first time proportion threshold, determining that the use habit of the storage battery is over-shortage use;

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

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

For example: if the time proportion of the battery load state in the [0, 60%) is more than 20%, determining that the use habit of the storage battery is over-shortage use, and prompting a user to carry out charging and discharging maintenance on the storage battery so as to prolong the service life of the storage battery;

if the time proportion of the battery load state in [60%, 80%) is more than 40%, determining that the use habit of the storage battery is normal use;

and if the time proportion of the battery load state in [80%,100% ] is more than 80%, determining that the use habit of the storage battery is over-full use, prompting a user of over-full storage battery at the moment, and properly discharging the storage battery.

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

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, prompting the user to perform charging maintenance properly, and if the time proportion of the battery load state in the second load threshold range is greater than the third time proportion threshold, prompting the user that the service state of the storage battery is normal, for example: if the time proportion of the battery load state is [60%, 80%) is more than 40% but less than 80%, the user is prompted to perform charging maintenance properly.

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

In an embodiment of the present invention, the first threshold of battery health is 80%, the second threshold of battery health is 85%, the first time period is 2-3 months, and the second time period is 4-6 months, for example: if the battery health is above 80% but below 85%, the service recommendation is to recommend service after 2-3 months; if the battery health is above 85%, the maintenance recommendation is to perform maintenance after 4-6 months. Through the simpler and more intuitive health report, the layman can well understand the detection result and how to perform battery maintenance;

in the embodiment of the invention, by combining the two characteristics of electrical characteristic detection and diagnosis of the starting system, a comprehensive solution for the starting system is provided, the starting system fault is more comprehensively evaluated, the judgment accuracy and comprehensiveness are improved, and the misjudgment are reduced.

Referring to fig. 9, fig. 9 is a schematic diagram of a detection process according to an embodiment of the present invention;

as shown in fig. 9, the detection process includes:

step S91: conducting a conductivity test;

specifically, the battery detector in the detection device is electrically connected with the storage battery through a connection battery detection clamp, and measures electrical parameters of the storage battery through a conductance method to determine the health state of the storage battery, wherein the electrical parameters include voltage, current, internal resistance, CCA value and the like.

Step S92: a diagnostic measurement;

specifically, a diagnostic instrument in the detection device is connected with an 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 diagnostic command includes at least one of a starter diagnostic command, a generator diagnostic command, a battery diagnostic command, and a line diagnostic command.

Step S93: determining a conductance test result;

specifically, the conductance test result includes a battery test result, a starter test result, a generator test result, and a line test result, where the battery test result includes at least one of a battery health degree, a battery charge state, a voltage, and a CCA value.

Step S94: determining a diagnostic measurement;

specifically, the diagnosis measurement result comprises a battery diagnosis result, a starter diagnosis result, a generator diagnosis result and a line diagnosis result, and the battery diagnosis result comprises at least one of a battery load state, a current battery use mileage and a previous battery use mileage, a fault code, a storage battery historical state, a battery use mileage and a battery generation use mileage.

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

Specifically, the health assessment report includes a remaining driving range of the battery, wherein generating the health assessment report of the vehicle includes: determining the estimated remaining driving mileage according to the mileage used by the last battery and the mileage used by the current battery; and determining the remaining driving mileage of the battery according to the health degree of the battery and the estimated remaining driving mileage by combining a preset health degree threshold value.

Specifically, the health assessment report further includes a battery usage habit, and the generating of the health assessment report for the vehicle includes:

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

In an embodiment of the invention, a detection method of a vehicle is applied to a detection device, the detection device is connected with a storage battery in the vehicle through an electric connector, and the detection device is in communication connection with an electronic control unit in the vehicle through a hardware communication interface, and the method comprises the following steps: determining a CCA value of the storage battery according to the internal resistance of the storage battery; determining the battery health degree of the storage battery according to the CCA value; sending a diagnostic command to an electronic control unit in the vehicle to obtain a diagnostic measurement including at least one of a battery load status, a current battery use mileage, and a last battery use mileage; generating a health assessment report for the vehicle based on the battery health and the diagnostic measurement. By combining the electrical characteristic detection and the diagnosis detection, the invention can solve the problem of misjudgment in the fault detection of the conventional automobile starting system and improve the accuracy of the fault detection.

Referring 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 apparatus 101 of the vehicle is applied to a battery detection device, the battery detection device is connected with a storage battery in the vehicle through an electric connector, and the battery detection device is connected with an electronic control unit in the vehicle through a hardware communication interface in a communication mode, and the apparatus includes:

a CCA value unit 1011, configured to determine a CCA value of the storage battery according to the internal resistance of the storage battery;

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

a diagnostic measurement unit 1013 to send a diagnostic command to an electronic control unit in the vehicle to obtain a diagnostic measurement comprising at least one of a battery load status, a current battery usage mileage, and a last battery usage mileage;

a health assessment reporting unit 1014 for generating a health assessment report of the vehicle based on the battery health and the diagnostic measurement.

Referring to fig. 11 again, fig. 11 is a schematic structural diagram of a detection apparatus according to an embodiment of the present invention; wherein the detection device is connected with a storage battery in a vehicle through an electrical connector, and the detection device is in communication connection with an electronic control unit in the vehicle through a hardware communication interface.

As shown in fig. 11, the detection device 110 includes: the system comprises a battery measuring module 112, a control module 111 and a diagnosis measuring module 113, wherein the battery measuring module 112 and the diagnosis measuring module 113 are respectively connected with the control module 111.

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

Specifically, the diagnostic measurement module 113 is communicatively connected to an electronic control unit in the vehicle through a hardware communication interface, and is configured to send a diagnostic command to the electronic control unit in the vehicle to obtain a diagnostic measurement result, where the diagnostic measurement result includes at least one of a battery load state, a current battery use mileage, and a previous battery use mileage. In an embodiment of the invention, the diagnostic measurement module comprises a diagnostic instrument and the hardware communication interface comprises an OBD interface.

Specifically, the control module 111 is connected to the battery measurement module 112 and the diagnosis measurement module 113, and is configured to control working processes of the battery measurement module 112 and the diagnosis measurement module 113, where the control module includes:

at least one processor; and

the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of detecting a vehicle of the above embodiment, including: determining a CCA value of the storage battery according to the internal resistance of the storage battery; determining the battery health degree of the storage battery according to the CCA value; sending a diagnostic command to an electronic control unit in the vehicle to obtain a diagnostic measurement including at least one of a battery load status, a current battery usage mileage, and a previous battery usage mileage; generating a health assessment report for the vehicle based on the battery health and the diagnostic measurement.

In an embodiment of the present invention, a detection apparatus for a vehicle is provided, including a battery measurement module, a diagnostic measurement module, and a control module, where the battery measurement module is configured to perform a conductance measurement on the vehicle to obtain a conductance measurement result, and the conductance measurement result includes a battery health degree; the diagnostic measurement module is used for sending a diagnostic command to an electronic control unit in the vehicle to obtain a diagnostic measurement result, wherein the diagnostic measurement result comprises at least one of a battery load state, a current battery use mileage and a previous battery use mileage; the control module is connected with the battery measuring module and the diagnosis measuring module and used for controlling the working processes of the battery measuring module and the diagnosis measuring module, acquiring the conductance measuring result through the battery measuring module and acquiring the diagnosis measuring result through the diagnosis measuring module, so that the problem of misjudgment in fault detection of the conventional automobile starting system can be solved by combining the electrical characteristics and the diagnosis result of the starting system, and the accuracy of the fault detection is improved.

Referring to fig. 12, fig. 12 is a schematic diagram of a hardware structure of another detecting apparatus according to 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, a memory 129, a processor 1210, a power source 1211, and the like. Those skilled in the art will appreciate that the configuration of the detection device shown in FIG. 12 does not constitute a limitation of the detection device, which may include more or fewer components than shown, or some components in combination, or a different arrangement of components. In the embodiment of the present invention, the detection device includes, but is not limited to, a television, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.

A processor 1210 configured to determine a CCA value of the battery according to the internal resistance of the battery; determining the battery health degree of the storage battery according to the CCA value; sending a diagnostic command to an electronic control unit in the vehicle to obtain a diagnostic measurement including at least one of a battery load status, a current battery usage mileage, and a previous battery usage mileage; generating a health assessment report for the vehicle based on the battery health and the diagnostic measurement.

In the embodiment of the invention, by combining the electrical characteristic detection and the diagnosis detection, the problem of misjudgment in the fault detection of the conventional automobile starting system can be solved, and the accuracy of the fault detection is improved.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 121 may be used for receiving and sending signals during a message sending and receiving process or a call process, and specifically, receives downlink data from a base station and then processes the received downlink data to the processor 1210; in addition, the uplink data is transmitted 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 may also communicate with a network and other devices through a wireless communication system.

The detection device 120 provides the user with wireless broadband internet access via the network module 122, such as assisting the user in sending and receiving e-mails, browsing web pages, and accessing streaming media.

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 an audio signal 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 (e.g., a call signal reception sound, a 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 an audio or video signal. The input Unit 124 may include a Graphics Processing Unit (GPU) 1241 and a microphone 1242, and the Graphics processor 1241 processes a target image of a still picture or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 126. The image frames processed by the graphic 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 may receive sounds and may be capable of processing such sounds into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 121 in case of a phone call mode.

The detection device 120 also includes at least one sensor 125, such as light sensors, motion sensors, and other sensors. Specifically, the light sensor includes an ambient light sensor that adjusts the brightness of the display panel 1261 according to the brightness of ambient light, and a proximity sensor that turns off the display panel 1261 and/or the backlight when the detection device 120 moves to the ear. As one type of motion sensor, an accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify and detect the device attitude (such as horizontal and vertical screen switching, related games, magnetometer attitude calibration), vibration identification related functions (such as pedometer, tapping), and the like; the sensors 125 may also include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., which will not be described in detail herein.

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 numeric or character information and generate key signal inputs related to user settings and function control of the sensing apparatus. Specifically, the user input unit 127 includes a touch panel 1271 and other input devices 1272. Touch panel 1271, also referred to as a touch screen, may collect touch operations by a user on or near it (e.g., user operations on touch panel 1271 or near touch panel 1271 using a finger, stylus, or any other suitable object or attachment). Touch panel 1271 may include two portions, a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 1210, receives a command from the processor 1210, and executes the command. In addition, the touch panel 1271 may be implemented by various types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to touch panel 1271, user input unit 127 may include other input devices 1272. In particular, other input devices 1272 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.

Further, touch panel 1271 can be overlaid on display panel 1261, and when touch panel 1271 detects a touch operation thereon or nearby, it can be transmitted to processor 1210 to determine the type of touch event, and then processor 1210 can provide corresponding visual output on display panel 1261 according to the type of touch event. Although in fig. 12, the touch panel 1271 and the display panel 1261 are implemented as two independent components to implement the input and output functions of the detection device, in some embodiments, the touch panel 1271 and the display panel 1261 may be integrated to implement the input and output functions of the detection device, and are not limited herein.

The interface unit 128 is an interface through which an external device is connected to the detection apparatus 120. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 128 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the detection apparatus 120 or may be used to transmit data between the detection apparatus 120 and the external device.

The memory 129 may be used to store software programs as well as various data. The memory 129 may mainly include a program storage area and a data storage area, wherein the program storage area may store an application 1291 (such as a sound playing function, an image playing function, etc.) and an operating system 1292, etc. required for at least one function; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the 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.

Processor 1210 is the control center for the test device, and interfaces and circuitry to the various components of the overall test device to perform the overall monitoring of the test device by running or executing software programs and/or modules stored in memory 129 and invoking data stored in memory 129 to perform the various functions of the test device and process the data. Processor 1210 may include one or more processing units; preferably, the processor 1210 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It is to be appreciated that the modem processor described above may not be integrated into processor 1210.

The detection device 120 may also include a power source 1211 (e.g., a battery) for powering the various components, and preferably, the power source 1211 may be logically coupled to the processor 1210 via a power management system, such that the power management system may be used to manage charging, discharging, and power consumption.

In addition, the detection device 120 includes some functional modules that are not shown, and are not described in detail herein.

Preferably, an embodiment of the present invention further provides a detection apparatus, including a processor 1210, a memory 129, and a computer program stored on the memory 129 and capable of running on the processor 1210, where the computer program, when executed by the processor 1210, implements each process of the above-mentioned vehicle detection method embodiment, and can achieve the same technical effect, and is not described herein again to avoid repetition.

The detection device 120 of embodiments of the present invention exists in a variety of forms, including but not limited to:

(1) A battery detector refers to an instrument for rapidly testing various batteries (groups) such as lithium ion batteries, nickel-metal hydride batteries, polymer batteries and the like. Such as: cell-phone battery tester, intercom battery tester notebook battery detector etc. extensively are applicable to various battery manufacture factory assembly line production and detect, and its common battery detector has: the device comprises a battery voltage and internal resistance tester, a finished product battery comprehensive tester, a battery capacity tester, a lithium battery protection board tester and a battery voltage sorter.

(2) The diagnosis instrument includes automobile fault diagnosis instrument, which is a vehicle fault self-checking terminal, and automobile fault diagnosis instrument (also called automobile decoder) which is a portable intelligent automobile fault self-checking instrument for detecting automobile fault.

(3) A mobile communication device: such devices are characterized by mobile communications capabilities and are primarily targeted at providing voice, data communications. Such detection devices include smart phones (e.g., iphones), multimedia phones, functional phones, and low-end phones, among others.

(4) The mobile personal computer equipment belongs to the category of personal computers, has calculation and processing functions and generally has the characteristic of mobile internet access. Such detection devices include: PDA, MID, and UMPC devices, etc., such as ipads.

(5) A portable entertainment device: such devices can display and play video content, and generally also have mobile internet access features. This type of device comprises: video players, handheld game consoles, and intelligent toys and portable car navigation devices.

(6) And other electronic equipment with a video playing function and an internet surfing function.

The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by one or more processors, the computer program implements the processes of the embodiment of the vehicle detection method, and can achieve the same technical effects, and in order to avoid repetition, the computer program is not described herein again. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

The above-described embodiments of the apparatus or device are merely illustrative, wherein the unit modules described as separate parts may or may not be physically separate, and the parts displayed as module units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network module units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.

Through the description of the foregoing embodiments, it is clear to those skilled in the art that the method of the foregoing embodiments may be implemented by software plus a necessary general hardware platform, and certainly may also be implemented by hardware, but in many cases, the former is a better implementation. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (which may be a mobile terminal, a personal computer, a server, or a network device) to execute the method according to the embodiments or some parts of the embodiments of the present invention.

Finally, it should be noted that: the embodiments described above with reference to the drawings are only for illustrating the technical solutions of the present invention, and the present invention is not limited to the above-mentioned specific embodiments, which are only illustrative and not restrictive; within the idea of the invention, also technical features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A detection method for a vehicle, applied to a detection device connected to a storage battery in the vehicle through an electrical connector, and communicatively connected to an electronic control unit in the vehicle through a hardware communication interface, the method comprising:

generating a health assessment report for the vehicle based on the battery health and the diagnostic measurement;

the determining the CCA value of the storage battery according to the internal resistance of the storage battery comprises the following steps:

determining a CCA value of the storage battery according to the internal resistance of the storage battery and by combining a preset coefficient and a compensation value;

said generating a health assessment report for said vehicle based on said battery health and said diagnostic measurements, comprising:

and determining the remaining driving mileage of the battery by combining a preset health threshold according to the health degree of the battery and the estimated remaining driving mileage.

2. The method of claim 1, wherein said sending a diagnostic command to an electronic control unit in the vehicle to obtain a diagnostic measurement comprises:

generating a diagnosis command according to the vehicle information;

3. The method of claim 2, wherein the vehicle includes a starting system including a battery, a starter, and a generator, the fault codes include a battery fault code, a starter fault code, a generator fault code, and a line fault code, and the vehicle health assessment report further includes at least one of the battery fault code, starter fault code, generator fault code, and line fault code.

4. The method of claim 3, further comprising:

5. The method of claim 1, wherein the vehicle health assessment report includes at least one of battery remaining range, battery health, battery load status, battery miles used, and last battery miles used.

6. The method of claim 1, wherein the diagnostic measurement comprises: generating a health assessment report for the vehicle, including:

7. The method of claim 1, wherein the diagnostic measurement comprises: a battery load state, the generating a health assessment report for the vehicle, comprising:

8. The method of claim 7, wherein the predetermined load threshold range comprises 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 is smaller than the third load threshold range, and the predetermined time scale threshold comprises a first time scale threshold, a second time scale threshold, and a third time scale threshold, wherein the first time scale threshold is smaller than the second time scale threshold, the second time scale threshold is smaller than the third time scale threshold, and wherein evaluating the battery usage habit of the battery according to the time scale of the battery load status within the predetermined load threshold range comprises:

9. The method of claim 1, wherein the vehicle health assessment report further comprises a maintenance recommendation, and wherein generating the vehicle health assessment report comprises:

10. A vehicle detection apparatus, applied to a battery detection device connected to a battery in a vehicle through an electrical connector, and communicatively connected to an electronic control unit in the vehicle through a hardware communication interface, the apparatus comprising:

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

a health assessment reporting unit for generating a health assessment report of the vehicle based on the battery health and the diagnostic measurement;

the CCA value unit is specifically configured to:

according to the internal resistance of the storage battery, combining a preset coefficient and a compensation value, and determining a CCA value of the storage battery;

the health assessment reporting unit is specifically configured to:

11. A detection device connected to a battery in a vehicle via an electrical connector and communicatively connected to an electronic control unit in the vehicle via a hardware communication interface, the battery detection device comprising:

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

at least one processor; and

a memory communicatively coupled to the at least one processor; wherein, the first and the second end of the pipe are connected with each other,

the memory stores instructions executable by the at least one processor to enable the at least one processor to perform a method of detecting a vehicle as claimed in any one of claims 1 to 9.