CN113049866A - Static current test system and static current test method of electric automobile - Google Patents
Static current test system and static current test method of electric automobile Download PDFInfo
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- CN113049866A CN113049866A CN201911375254.0A CN201911375254A CN113049866A CN 113049866 A CN113049866 A CN 113049866A CN 201911375254 A CN201911375254 A CN 201911375254A CN 113049866 A CN113049866 A CN 113049866A
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- 238000012360 testing method Methods 0.000 title claims abstract description 42
- 230000003068 static effect Effects 0.000 title claims abstract description 29
- 238000010998 test method Methods 0.000 title abstract description 5
- 230000009897 systematic effect Effects 0.000 title description 2
- 238000005259 measurement Methods 0.000 claims abstract description 24
- 238000012545 processing Methods 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims description 15
- 238000004590 computer program Methods 0.000 claims description 13
- 230000005059 dormancy Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 9
- 230000006870 function Effects 0.000 description 7
- 238000001514 detection method Methods 0.000 description 3
- 238000003745 diagnosis Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/20—Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments
- G01R1/203—Resistors used for electric measuring, e.g. decade resistors standards, resistors for comparators, series resistors, shunts
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Abstract
The invention provides a static current test system and a static current test method of an electric automobile, wherein the test system comprises: a voltage measurement module; one end of the switch is connected with the negative electrode of the vehicle-mounted storage battery, the other end of the switch is connected with one end of the shunt, and the other end of the shunt is connected with a grounding point of a vehicle body; a first current measurement module; at least one second current measurement module; the voltage measuring module, the first current measuring module and the second current measuring module are respectively connected with the data processing module; according to the embodiment of the invention, the quiescent current of the whole vehicle can be accurately measured and the controller of power consumption can be accurately positioned through the measurement results of the voltage measurement module, the first current measurement module and the second current measurement module of the quiescent current test system, so that the vehicle-mounted electric appliance of power consumption can be determined; therefore, the reason of power consumption and whether the dormancy awakening strategy is reasonable can be analyzed.
Description
Technical Field
The invention relates to the technical field of electric automobiles, in particular to a static current testing system and a static current testing method of an electric automobile.
Background
The quiescent current of the whole vehicle is formed by loads which are connected on a normal fire line in the circuit of the whole vehicle and are not controlled by an operation switch, the loads generally comprise a sound system, a clock, a part of sensors, various modules and the like, and the quiescent current of the whole vehicle is mainly characterized by having the functions of continuously memorizing, monitoring or working under the state of not firing an ignition switch and the like.
Because the increase of electronic configuration among the electric automobile, many controls all need insert the ordinary electricity of battery, and the controller inserts the ordinary electricity and can produce quiescent current usually, and promptly after whole car shutting, the controller still has very little current loss, if the controller is many, or after certain controller breaks down intermittently, then can lead to whole car discharge current too big, lead to the battery insufficient voltage. After the production and debugging of the automobile are finished, the static discharge current of the whole automobile needs to be detected so as to prevent the static current of the whole automobile from being too large due to the fact that some electronic components are not assembled or faults exist, and further, the storage battery is in power shortage and the engine cannot be started.
And the whole car product ubiquitous in prior art is at present discharged a plurality of days under the whole car, and the little storage battery of low pressure lacks the electric problem, if the little storage battery of low pressure lacks the electric, then whole car can not be electrified, causes the unable use of vehicle. In the prior art, although the detection method of the quiescent current of the whole vehicle can measure the value of the quiescent current, the working or awakening controller cannot be accurately judged.
Disclosure of Invention
The embodiment of the invention aims to provide a quiescent current test system and a quiescent current test method of an electric automobile, so as to solve the problem that the whole automobile quiescent current detection method in the prior art cannot accurately judge a working or awakening controller.
In order to solve the above problem, an embodiment of the present invention provides a static current testing system, including:
the voltage measuring module is connected with two poles of a vehicle storage battery at two ends respectively;
one end of the switch is connected with the negative electrode of the vehicle-mounted storage battery, the other end of the switch is connected with one end of the shunt, and the other end of the shunt is connected with a grounding point of a vehicle body;
the two ends of the first current measuring module are respectively connected with the two ends of the current divider;
the two ends of each second current measuring module are respectively connected with the two ends of the vehicle-mounted safety piece; the vehicle safety piece is connected with a controller of at least one vehicle-mounted electrical appliance;
and the voltage measuring module, the first current measuring module and the second current measuring module are respectively connected with the data processing module.
The data processing module is also connected with an OBD interface of the vehicle-mounted automatic diagnosis system through a CAN bus.
Wherein, the shunt is a shunt resistor.
The embodiment of the invention also provides a static current testing method of an electric automobile, which is applied to the static current testing system and comprises the following steps:
the data processing module of the quiescent current test system acquires data measured by the voltage measuring module, the first current measuring module and the second current measuring module;
and determining the quiescent current of the electric automobile according to the acquired data.
Wherein, according to the acquired data, determining the quiescent current of the electric automobile comprises:
determining the static voltage of the vehicle storage battery according to the acquired data of the voltage measurement module;
determining the whole vehicle quiescent current of the electric vehicle according to the acquired data of the first current measurement module;
and determining the quiescent current output by each vehicle-mounted safety piece according to the acquired data of the second current measurement module.
Wherein the method further comprises:
acquiring message data of the whole vehicle from an OBD interface through a CAN bus;
and judging whether the controller of the vehicle-mounted electric appliance outputs the quiescent current or not according to the vehicle message data.
Wherein the method further comprises:
and determining the quiescent output current of the controller of each vehicle-mounted electrical appliance according to the quiescent current output by each vehicle-mounted safety sheet and whether the controller of each vehicle-mounted electrical appliance outputs the quiescent current.
The embodiment of the invention also provides a static current test system, which comprises a memory, a processor and a program which is stored on the memory and can be operated on the processor; when the processor executes the program, the static current testing method of the electric automobile is realized.
Embodiments of the present invention also provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in the static current testing method for an electric vehicle as described above.
The technical scheme of the invention at least has the following beneficial effects:
according to the quiescent current test system and the quiescent current test method of the electric automobile, the quiescent current of the whole automobile can be accurately measured through the measurement results of the voltage measurement module, the first current measurement module and the second current measurement module of the quiescent current test system, and the controller consuming power can be accurately positioned, so that the vehicle-mounted electric appliance consuming power is determined; therefore, the reason of power consumption and whether the dormancy awakening strategy is reasonable can be analyzed.
Drawings
FIG. 1 is a schematic structural diagram of a static current testing system according to an embodiment of the present invention;
fig. 2 is a schematic flow chart illustrating steps of a method for testing a quiescent current of an electric vehicle according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, an embodiment of the present invention provides a static current testing system, including:
the voltage measuring module is connected with two poles of a vehicle storage battery at two ends respectively;
one end of the switch is connected with the negative electrode of the vehicle-mounted storage battery, the other end of the switch is connected with one end of the shunt, and the other end of the shunt is connected with a grounding point of a vehicle body;
the two ends of the first current measuring module are respectively connected with the two ends of the current divider;
the two ends of each second current measuring module are respectively connected with the two ends of the vehicle-mounted safety piece; the vehicle safety piece is connected with a controller of at least one vehicle-mounted electrical appliance;
and the voltage measuring module, the first current measuring module and the second current measuring module are respectively connected with the data processing module.
The static current testing system provided by the embodiment of the invention is applied to the pure electric vehicle, and the pure electric vehicle is a vehicle which takes a vehicle-mounted power supply as power and drives wheels to run by using a motor, and meets various requirements of road traffic and safety regulations.
The vehicle quiescent current is the dormant current of the whole vehicle electrical system after all vehicle-mounted electrical appliances and equipment of a high-voltage and low-voltage power supply system are in a closed state, such as an ignition switch OFF, a main relay is disconnected, a DC/DC stops outputting, vehicle doors and windows, a front cabin cover and a trunk cover are closed, and the like, and various relevant controllers, such as a whole vehicle controller VCU, a battery management system BMS and the like enter a dormant state.
As an optional embodiment, the data processing module is further connected with an OBD interface of the vehicle-mounted automatic diagnosis system through a CAN bus.
It should be noted that the data processing module is configured to collect a CAN message signal, a voltage signal, a current signal, a temperature signal, and the like, and perform data storage and data analysis, thereby determining a quiescent current value of each vehicle-mounted electrical appliance.
As another alternative, the shunt is a shunt resistor. The shunt resistor has the function of shunting, and meanwhile, the resistance value of a test element connected in a loop in series is greatly reduced.
The quiescent current measuring system provided by the embodiment of the invention CAN accurately measure the quiescent current of the whole vehicle, simultaneously read CAN message data of the whole vehicle and accurately analyze the quiescent current value and the working controller under the quiescent state of the whole vehicle.
As shown in fig. 2, an embodiment of the present invention further provides a static current testing method for an electric vehicle, which is applied to the static current testing system described above, and includes:
and step 22, determining the quiescent current of the electric automobile according to the acquired data.
As an alternative embodiment, step 22 comprises:
determining the static voltage of the vehicle storage battery according to the acquired data of the voltage measurement module;
determining the whole vehicle quiescent current of the electric vehicle according to the acquired data of the first current measurement module;
and determining the quiescent current output by each vehicle-mounted safety piece according to the acquired data of the second current measurement module.
Because one safety chip block can be connected with the controller of one vehicle-mounted electric appliance and also can be connected with the controllers of two or more vehicle-mounted electric appliances, which controller of the vehicle-mounted electric appliance is in the power consumption state cannot be determined according to the data of the second current measurement module.
As another alternative embodiment, the method further comprises:
acquiring message data of the whole vehicle from an OBD interface through a CAN bus;
and judging whether the controller of the vehicle-mounted electric appliance outputs the quiescent current or not according to the vehicle message data.
For example, if message data of the controller of vehicle-mounted electrical appliance 1 is received, it is determined that the controller of vehicle-mounted electrical appliance 1 outputs the quiescent current. If the message data of the controller of the vehicle-mounted electrical appliance 2 are not received, it is determined that the controller of the vehicle-mounted electrical appliance 2 does not output the quiescent current.
Optionally, the method further includes:
and determining the quiescent output current of the controller of each vehicle-mounted electrical appliance according to the quiescent current output by each vehicle-mounted safety sheet and whether the controller of each vehicle-mounted electrical appliance outputs the quiescent current.
According to the quiescent current test system provided by the embodiment of the invention, whether the power supply system of the whole vehicle meets the design requirements can be judged through the quiescent current test of the whole vehicle and the controller; whether the controller sleep policy complies with the corresponding functional specification; unnecessary leakage current of the vehicle is found, and the safe work of the electric system of the whole vehicle is ensured; meanwhile, whether the residual electric quantity of the low-voltage storage battery can enable the main relay to be normally attracted to start the vehicle after the vehicle is static for a plurality of days can be evaluated.
For example, the work flow of the static current test system is as follows:
and performing function detection on each vehicle-mounted electrical appliance to determine that each electrical appliance works normally.
And (4) inspecting each testing device, and determining that all used sensors, probes and computer data acquisition programs can work normally.
The voltage channels of the voltage measuring modules are connected to both poles of the vehicle battery.
Disconnecting the negative electrode wire harness of the low-voltage storage battery through a switch, and connecting the negative electrode of the low-voltage storage battery with a grounding point of a vehicle body by using a lead-out wire; and connecting the first current measuring module to a low-voltage storage battery outgoing line, and simultaneously connecting the shunt circuit between the low-voltage storage battery outgoing line and the grounding point of the vehicle body in series.
And searching and determining the safety sheet for protecting each measured controller according to the electrical schematic diagram. And pulling out the safety disc, and connecting the current channel of the second current measuring module in series into a safety disc socket (applicable to each subsystem controller) for measuring the passing current of each subsystem controller. And connecting the data output end of the current/voltage measuring module with the data processing module to acquire corresponding current/voltage.
And corresponding BUS data lines of the CAN BUS are led out from the OBD interface, and the number of channels is configured according to the number of channels which CAN be received by the data acquisition system. The method aims to read the controller information when the vehicle works, and carry out iterative processing in the same sequence with actual data acquisition information and current data, and analyze to obtain the static current condition and the working condition of the controller under different working conditions.
In summary, the quiescent current testing method for the electric vehicle provided by the embodiment of the invention can accurately realize that the quiescent current of the whole vehicle can be accurately measured, and meanwhile, the controller consuming power can be accurately positioned; therefore, the reason of power consumption and whether the dormancy awakening strategy is reasonable or not are analyzed, the whole vehicle control dormancy strategy is greatly assisted, and strong support is provided for the strategy conformity and verification of the whole vehicle electric control system.
An embodiment of the present invention further provides a quiescent current testing system, which includes a memory, a processor, and a computer program that is stored in the memory and can be run on the processor, where the processor implements each process in the quiescent current testing method embodiment described above when executing the program, and can achieve the same technical effect, and details are not repeated here to avoid repetition.
The embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements each process in the foregoing static current testing method embodiment, and can achieve the same technical effect, and details are not repeated here to avoid repetition. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-readable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block or blocks.
These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. A quiescent current test system, comprising:
the voltage measuring module is connected with two poles of a vehicle storage battery at two ends respectively;
one end of the switch is connected with the negative electrode of the vehicle-mounted storage battery, the other end of the switch is connected with one end of the shunt, and the other end of the shunt is connected with a grounding point of a vehicle body;
the two ends of the first current measuring module are respectively connected with the two ends of the current divider;
the two ends of each second current measuring module are respectively connected with the two ends of the vehicle-mounted safety piece; the vehicle safety piece is connected with a controller of at least one vehicle-mounted electrical appliance;
and the voltage measuring module, the first current measuring module and the second current measuring module are respectively connected with the data processing module.
2. The quiescent current test system according to claim 1, characterized in that said data processing module is further connected to an on-board automatic diagnostic system (OBD) interface via a CAN bus.
3. The quiescent current test system of claim 1, wherein said shunt is a shunt resistor.
4. A quiescent current testing method of an electric vehicle, applied to the quiescent current testing system according to any one of claims 1 to 3, comprising:
the data processing module of the quiescent current test system acquires data measured by the voltage measuring module, the first current measuring module and the second current measuring module;
and determining the quiescent current of the electric automobile according to the acquired data.
5. The method of claim 4, wherein determining the quiescent current of the electric vehicle from the acquired data comprises:
determining the static voltage of the vehicle storage battery according to the acquired data of the voltage measurement module;
determining the whole vehicle quiescent current of the electric vehicle according to the acquired data of the first current measurement module;
and determining the quiescent current output by each vehicle-mounted safety piece according to the acquired data of the second current measurement module.
6. The method of claim 5, further comprising:
acquiring message data of the whole vehicle from an OBD interface through a CAN bus;
and judging whether the controller of the vehicle-mounted electric appliance outputs the quiescent current or not according to the vehicle message data.
7. The method of claim 6, further comprising:
and determining the quiescent output current of the controller of each vehicle-mounted electrical appliance according to the quiescent current output by each vehicle-mounted safety sheet and whether the controller of each vehicle-mounted electrical appliance outputs the quiescent current.
8. A quiescent current test system comprising a memory, a processor, and a program stored on said memory and executable on said processor; the processor is characterized in that when executing the program, the processor realizes the static current testing method of the electric automobile according to any one of claims 4-7.
9. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method for quiescent current testing of an electric vehicle according to any one of claims 4-7.
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| CN201911375254.0A CN113049866A (en) | 2019-12-27 | 2019-12-27 | Static current test system and static current test method of electric automobile |
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| CN201911375254.0A CN113049866A (en) | 2019-12-27 | 2019-12-27 | Static current test system and static current test method of electric automobile |
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Cited By (4)
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| CN115208785A (en) * | 2022-05-30 | 2022-10-18 | 重庆长安汽车股份有限公司 | Power management network testing method, device, equipment and medium for vehicle-mounted equipment |
| CN115436684A (en) * | 2022-07-29 | 2022-12-06 | 中国第一汽车股份有限公司 | Universal static current detection system and method for trial-production sample car and car |
| CN117148185A (en) * | 2023-10-30 | 2023-12-01 | 四川赛科检测技术有限公司 | Method, device and storage medium for testing quiescent current of battery system |
| CN117971604A (en) * | 2024-03-29 | 2024-05-03 | 此芯科技(上海)有限公司 | Static current prediction method and device, storage medium and electronic equipment |
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Application publication date: 20210629 |