CN112147985A - Method for testing safety of whole function of pure electric vehicle - Google Patents
Method for testing safety of whole function of pure electric vehicle Download PDFInfo
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- CN112147985A CN112147985A CN202011057545.8A CN202011057545A CN112147985A CN 112147985 A CN112147985 A CN 112147985A CN 202011057545 A CN202011057545 A CN 202011057545A CN 112147985 A CN112147985 A CN 112147985A
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- tested
- whole vehicle
- connector
- test box
- open circuit
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
- G05B23/0213—Modular or universal configuration of the monitoring system, e.g. monitoring system having modules that may be combined to build monitoring program; monitoring system that can be applied to legacy systems; adaptable monitoring system; using different communication protocols
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24065—Real time diagnostics
Abstract
The invention provides a method for testing the functional safety of a pure electric vehicle, which can conveniently utilize a circuit breaking test box to carry out short circuit and circuit breaking fault injection on an electric pin of a controller to be tested in the running process of the whole vehicle on a hub rack by a method for carrying out electric fault injection type whole vehicle functional safety test on the hub rack, and analyze and evaluate the influence of electric faults on the whole vehicle through test data after the fault injection.
Description
Technical Field
The invention relates to the field of vehicle functional safety testing, in particular to a vehicle functional safety testing method for a pure electric vehicle.
Background
Functional safety means that the electronic and electrical system with the whole vehicle level function has no unacceptable risk in operation. In the functional safety test of the whole vehicle, the method can be roughly divided into the following stages: hardware testing, software code testing, software and hardware integration testing, system integration testing and finished automobile testing. Hardware test, software and hardware integrated test and system integrated test are generally carried out on a PC (personal computer), an HIL (high-level integrated Circuit) rack or a power assembly test rack, the function safety test of the whole vehicle needs to be carried out on the whole vehicle by a driver, faults such as electrical short circuit, circuit breaking and the like need to be injected in the running process of the whole vehicle in the dynamic test, on one hand, the operation of a tester is extremely inconvenient, on the other hand, the risk of the tester is too high, so the function safety test related to an electrical interface generally refers to a rack test result carried out in a laboratory environment, and the function safety test of the whole vehicle under the working conditions is not forced. However, the electronic and electrical system of the pure electric vehicle is complicated, and an electrical signal related fault is very easy to occur, and after the fault occurs, the whole vehicle behaves exactly. Whether the functional safety design of the whole vehicle is reasonable or not. In fact, the optimal functional safety test scheme is to perform the complete vehicle-level functional safety test by a method after the hardware, software and system integration test is finished, the confidence coefficient of the test result is the highest, and the verification of the functional safety design scheme is the most sufficient.
Disclosure of Invention
The invention aims to provide a pure electric vehicle whole vehicle function safety test method, which can conveniently utilize a circuit breaking test box to carry out short circuit and circuit breaking fault injection on an electric pin of a controller to be tested in the running process of a whole vehicle on a hub rack by a method for carrying out electric fault injection type whole vehicle function safety test on the hub rack, and analyze and evaluate the influence of electric faults on the whole vehicle by test data after fault injection.
The technical scheme of the invention is as follows:
the invention provides a method for testing the whole function safety of a pure electric vehicle, which comprises the following steps:
step S1, the whole vehicle to be tested is driven to the hub rack, and high-voltage electrification and low-voltage storage battery removal operations are carried out on the whole vehicle, so that the whole vehicle to be tested is in an uncharged state;
step S2, disconnecting a connector of a controller to be tested on the whole vehicle to be tested from a whole vehicle wire harness terminating connector; and then executing: connecting the whole wiring harness end plug-in unit with the left end plug-in unit of the open circuit test box, connecting the right end plug-in unit of the open circuit test box with the inner end of the right end connection wiring harness plug-in unit, and connecting the outer end of the right end connection wiring harness plug-in unit of the open circuit test box with the plug-in unit of the controller to be tested; connecting all the banana connectors bridged between input and output on the open circuit test box, so that the left side of a pin of each banana connector is connected with a pin of a left end connection plug-in unit of the open circuit test box, and the right side of the pin of each banana connector is connected with a pin of a right side plug-in unit of the open circuit test box;
step S3, reinserting the removed accumulator jar into the whole vehicle to be tested; when the hub rotating rack is confirmed to be in a testable safety state, the hub rotating rack is operated to be in a moving state; then, operating the high voltage on the whole vehicle to be tested and driving on the rotating hub rack;
step S4, in the process that the whole vehicle to be tested runs on the hub rack, the pin to be tested in the open circuit test box and the connecting end corresponding to the banana connector are opened to obtain the reaction information of the whole vehicle to be tested after the fault is injected;
and step S5, after the test of the controller to be tested on the whole vehicle to be tested is completed, the high-voltage power-off of the whole vehicle and the low-voltage power-off of the whole vehicle are executed, the open circuit test box is taken out, and the connection between the connector of the controller to be tested on the whole vehicle to be tested and the harness terminating connector of the whole vehicle is restored.
Preferably, the pin to be tested in the disconnection test box in step S4 is one of the pins on the left-end connector of the disconnection test box, and the pin to be tested corresponds to a pin that needs to generate a fault signal on the connector of the controller under test.
Preferably, in step S2, the number of pins in the left end connector, the right end connector, the inner end of the right side connection harness connector, and the outer end of the right side connection harness connector of the disconnection test box is the same as the number of connectors of the whole vehicle harness connector and the controller to be tested.
The invention has the following advantages:
the defect that the electric fault injection test cannot be carried out on the controller in the running process of the whole vehicle can be overcome, and the effect of carrying out the electric fault function safety verification on the real vehicle is achieved by switching the open circuit test box.
The method innovatively adopts a mode of combining the open circuit test box with the real vehicle, and conveniently performs electrical short circuit or open circuit fault injection in the running process of the whole vehicle under the condition of not damaging the wiring harness of the whole vehicle, so that the test omission of fault diagnosis functional items and the safety risk of the real vehicle function possibly caused by the missing of the test items can be reduced.
Drawings
FIG. 1 shows the connection principle of the whole vehicle of the controller to be tested;
FIG. 2 illustrates the connection principle of the disconnection test cassette;
FIG. 3 illustrates the working principle of the method of the present invention;
FIG. 4 is a logic flow diagram of a method of the present invention.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
As shown in fig. 1, for the whole vehicle to be tested, the whole vehicle harness connector and the connector of the controller to be tested are plugged, in order to test the functional safety of the whole vehicle, in this embodiment, a fault is injected into the whole vehicle by the open circuit test box, and the performance of the whole vehicle when the controller to be tested fails is simulated and tested.
Before the test is carried out, the preparation of a disconnection test box needs to be carried out, specifically: the left end connector of the open circuit test box needs to be designed into a connector consistent with the connector of the controller to be tested; the outer end of the plugging wire harness at the right end of the open circuit test box and the connector of the controller to be tested need to be designed into a plug-in connector.
After the preparation is completed, the whole function safety test of the pure electric vehicle can be started, and referring to fig. 4, the whole function safety test method of the pure electric vehicle provided by the invention comprises the following steps:
1. the disconnection test cassette is ready. The left end connector of the open circuit test box needs to be designed into a connector consistent with the connector of the controller to be tested; the connector at the outer side of the wiring harness at the right end of the open circuit test box and the connector of the controller to be tested need to be designed into a plug-in connector.
2. And (3) driving the whole vehicle to be tested on the rotating hub rack, disconnecting the high-voltage connection when the whole vehicle is powered off, pulling off the storage battery (disconnecting the low-voltage electrical connection of the whole vehicle), and ensuring that the whole vehicle is in an uncharged state.
3. As shown in fig. 2 and fig. 3, the connector at the whole vehicle harness end (female end) of the controller to be tested (the controller which needs to perform electrical fault injection) on the whole vehicle is pulled out, the whole vehicle harness end is inserted into the connector at the left end (male end) of the open circuit test box, the connector at one side of the right side of the open circuit test box for connecting the harness is inserted into the connector at the right end (male end) of the open circuit test box, and the connector at the other side of the right side of the open circuit test box for connecting the harness (female end) is connected with the connector of. In addition, all banana plugs connected across the inputs and outputs on the disconnection test box need to be connected. The left side of a pin connected with the banana connector is communicated with a pin of a left end connection plug-in unit of the open circuit test box, and the right side of the pin is communicated with a pin of a right end plug-in unit of the open circuit test box.
4. And after the storage battery is arranged, the rotating hub rack is operated to be in a motion state after the rotating hub rack is confirmed to be in a testable safety state, and a driver operates the whole vehicle to run on the rotating hub after high voltage is applied.
5. During the running process of the whole vehicle, a tester pulls out the banana plug corresponding to the pin to be tested in the open circuit test box to an open circuit state (or short-circuits the pin to be tested with a power supply or the ground in a flying wire mode), and observes the performance of the whole vehicle after fault injection.
6. After the test is finished, the high voltage and the low voltage are applied to the whole vehicle, then the connection between the open circuit test box and the controller to be tested and the whole vehicle wiring harness is disconnected, the whole vehicle wiring harness is connected with the controller to be tested, and the original state of the whole vehicle is restored.
The method can overcome the defect that the electrical fault injection test cannot be carried out on the controller in the whole vehicle running process, and achieves the effect of carrying out the electrical fault functional safety verification on the real vehicle in a mode of switching the open circuit test box. In addition, the method innovatively adopts a mode of combining the open circuit test box with the real vehicle, and can conveniently carry out electrical short circuit or open circuit fault injection in the running process of the whole vehicle under the condition of not damaging the wiring harness of the whole vehicle, thereby reducing the test omission of fault diagnosis functional items and the safety risk of the real vehicle function possibly caused by the missing of the test items.
The embodiments described above describe only some of the one or more embodiments of the present invention, but those skilled in the art will recognize that the invention can be embodied in many other forms without departing from the spirit or scope thereof. Accordingly, the present examples and embodiments are to be considered as illustrative and not restrictive, and various modifications and substitutions may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.
Claims (3)
1. The method for testing the whole function safety of the pure electric vehicle is characterized by comprising the following steps:
step S1, the whole vehicle to be tested is driven to the hub rack, and high-voltage electrification and low-voltage storage battery removal operations are carried out on the whole vehicle, so that the whole vehicle to be tested is in an uncharged state;
step S2, disconnecting a connector of a controller to be tested on the whole vehicle to be tested from a whole vehicle wire harness terminating connector; and then executing: connecting the whole wiring harness end plug-in unit with the left end plug-in unit of the open circuit test box, connecting the right end plug-in unit of the open circuit test box with the inner end of the right end connection wiring harness plug-in unit, and connecting the outer end of the right end connection wiring harness plug-in unit of the open circuit test box with the plug-in unit of the controller to be tested; connecting all the banana connectors bridged between input and output on the open circuit test box, so that the left side of a pin of each banana connector is connected with a pin of a left end connection plug-in unit of the open circuit test box, and the right side of the pin of each banana connector is connected with a pin of a right side plug-in unit of the open circuit test box;
step S3, reinserting the removed accumulator jar into the whole vehicle to be tested; when the hub rotating rack is confirmed to be in a testable safety state, the hub rotating rack is operated to be in a moving state; then, operating the high voltage on the whole vehicle to be tested and driving on the rotating hub rack;
step S4, in the process that the whole vehicle to be tested runs on the hub rack, the pin to be tested in the open circuit test box and the connecting end corresponding to the banana connector are opened to obtain the reaction information of the whole vehicle to be tested after the fault is injected;
and step S5, after the test of the controller to be tested on the whole vehicle to be tested is completed, the high-voltage power-off of the whole vehicle and the low-voltage power-off of the whole vehicle are executed, the open circuit test box is taken out, and the connection between the connector of the controller to be tested on the whole vehicle to be tested and the harness terminating connector of the whole vehicle is restored.
2. The method according to claim 1, wherein the pin under test in the disconnection test box in step S4 is the pin corresponding to the pin required to generate the fault signal in the connector of the controller under test, and is one of the pins on the left-end connector of the disconnection test box.
3. The method of claim 1, wherein in step S2, the number of pins in the left end connector, the right end connector, the inner end of the right side connection harness connector, and the outer end of the right side connection harness connector of the disconnection test box is the same as the number of connectors of the vehicle-mounted whole harness connector and the controller under test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011057545.8A CN112147985A (en) | 2020-09-30 | 2020-09-30 | Method for testing safety of whole function of pure electric vehicle |
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| CN202011057545.8A CN112147985A (en) | 2020-09-30 | 2020-09-30 | Method for testing safety of whole function of pure electric vehicle |
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| US20090249868A1 (en) * | 2004-10-29 | 2009-10-08 | Spx Corporation | Starter Zero Current Test Apparatus and Method |
| CN103926498A (en) * | 2013-01-11 | 2014-07-16 | 上海大众汽车有限公司 | Finished automobile dynamic diagnosis and test platform and method |
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Application publication date: 20201229 |
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