CN112067921A - Conduction charging test system and method for electric vehicle - Google Patents
Conduction charging test system and method for electric vehicle Download PDFInfo
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Abstract
The invention provides a conduction charging simulation test system for an electric vehicle, which comprises a whole vehicle charging simulation system and the electric vehicle for measurement, wherein the whole vehicle charging simulation system comprises: the system comprises a controllable alternating current power supply, an alternating current charging interoperation control module, a controllable direct current power supply, a direct current charging interoperation control module and an upper computer. The invention also provides a corresponding method. By implementing the embodiment of the invention, the charging process of different types of alternating current and direct current charging equipment and the electric vehicle can be simulated to be tested, the charging compatibility and stability of the electric vehicle are improved, and the charging fault is reduced, so that the conduction charging interoperability test of the electric vehicle is realized.
Description
Technical Field
The invention relates to the technical field of electric vehicle charging, in particular to a conduction charging test system and method for an electric vehicle, which are used for simulating charging processes of different types of alternating current and direct current charging equipment and the electric vehicle to perform control tests.
Background
In recent years, with the continuous development and popularization of new energy electric vehicles, the infrastructure of charging equipment is continuously improved, and in order to solve the compatibility problem of charging piles and electric vehicles and the matching adaptability of propelling vehicles and piles, 5 national standards such as electric vehicle charging interfaces and communication protocols are released by the national standard committee. However, in the practical process, due to different understandings of national standards, the problem that the electric vehicle and part of the charging equipment are often incompatible to charging occurs, and how to improve the charging compatibility and stability of the electric vehicle and the charging equipment is one of the basic functional requirements of the electric vehicle. Therefore, the design meets the national standard requirements, and meanwhile, the improvement of the charging stability, reliability and compatibility of the electric vehicle and charging equipment of different brands and different types is an important guarantee for charging the electric vehicle. However, the test modes in the prior art have the defects of single test system and narrow coverage.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a conduction charging test system and method for an electric vehicle, which can test charging interoperability between an ac charging mode and a dc charging mode, and can improve compatibility and versatility of the electric vehicle to different charging devices.
To solve the above technical problems, as an aspect of the present invention, there is provided a conduction charging simulation test system for an electric vehicle, which includes a whole vehicle charging simulation system and a measuring electric vehicle, wherein,
the whole vehicle charging simulation system comprises:
the system comprises a controllable alternating current power supply, a first relay switch device and a second relay switch device, wherein the controllable alternating current power supply is used for providing a controllable alternating current power supply, and the output end of the controllable alternating current power supply is connected with the first relay switch device which is used for being connected with an alternating current charging port of an electric vehicle to be measured;
the alternating current charging interoperation control module is connected with the controllable alternating current power supply and the first relay switch device and is used for controlling the on-off of each relay switch in the first relay switch device aiming at various types of alternating current charging equipment and acquiring detection data in a charging process;
the controllable direct-current power supply is used for providing a controllable direct-current power supply, the output end of the controllable direct-current power supply is connected with a second relay switch device, and the second relay switch device is used for being connected with a direct-current charging port of the electric vehicle to be measured;
the direct-current charging interoperation control module is connected with the controllable direct-current power supply and the second relay switch device and used for controlling the on-off of each relay switch in the second relay switch device aiming at various types of direct-current charging equipment and acquiring detection data in a charging process;
and the upper computer is internally provided with automatic test software aiming at various types of alternating current charging equipment and direct current charging equipment and used for controlling the alternating current charging interoperation control module or the direct current charging interoperation control module to carry out charging simulation test operation.
The controllable alternating current power supply receives input of a three-phase five-wire alternating current source, and the output of the controllable alternating current power supply is connected with an electric energy metering module;
the three alternating current lines and the neutral line led out by the electric energy calculation module are respectively connected with a vehicle-mounted charger in the electric vehicle for measurement through four relay switches S1, S2, S3 and S4 of a first relay switch device;
the ground wire led out by the electric energy computing module is connected with the vehicle body ground through a fifth relay switch S5 in the first relay switch device;
the controllable direct-current power supply is at least provided with a power supply control device which is connected with a resistor RC through a first control switch K1, and the other end of the resistor RC is connected with a vehicle control device in the electric vehicle through a sixth relay switch (S6) in the first relay switch device; a resistor R4 is connected in parallel with two ends of the first control switch K1;
the alternating current charging interoperation control module at least comprises a power supply control device, the output end of the power supply control device is connected with the anode of a diode D1 through a seventh relay switch S7 in a first relay switch device, the cathode of the diode is respectively connected with the vehicle control device, the vehicle body ground through a resistor R3 and the vehicle body ground through a resistor R2 and a second control switch K2;
a first detection point is arranged between the power supply control device and the seventh relay switch S7; a second detection point is arranged at the cathode of the diode D1; a third detection point is provided between the sixth relay switch S6 and the vehicle control device.
The resistance values of the resistor RC and the resistor R4 are continuously adjustable, and the adjustment precision is less than or equal to 3%; the step value is 1 Ω, and is used to simulate the full connection state or the half connection state of the cable capacities 10A, 16A, 32A, and 63A by adjustment.
The controllable direct-current power supply receives three-phase five-wire alternating-current source input, converts the three-phase five-wire alternating-current source input into a direct-current power supply and respectively outputs the direct-current power supply to the direct-current power supply output unit and the auxiliary power supply unit; the output end of the direct current power supply output unit is connected with an electric energy metering module;
the positive line and the negative line of the direct-current power supply led out by the electric energy calculation module are respectively connected with a battery pack in the electric vehicle for measurement through a fifteenth relay switch S15 and a sixteenth relay switch S16 of the second relay switch device;
the positive line of the direct current power supply is connected in series with a sixth resistor R6 and a sixth control switch K6 and is grounded; the negative line of the direct current power supply is connected in series with a seventh resistor R7 and a seventh control switch K7 and is connected with the ground in parallel; the ground is connected with the vehicle body ground of the electric vehicle for measurement through a tenth relay switch S10 of the second relay switch device;
the direct current interoperation control system leads out a plurality of output lines, and S +, S-, CC1 and CC2 lines are formed through four relay switches S13, S14, S8 and S9 of a second relay switch device and are connected with a vehicle controller in the electric vehicle for measurement;
the positive and negative power supplies output by the auxiliary power supply form A + and A-lines through two relay switches S11 and S12 respectively and are connected with a vehicle controller in the electric vehicle for measurement;
a resistor R4 is connected between the CC1 line and the ground line in series, and a resistor R2 and a fifth control switch K5 which are connected in series are connected in parallel at two ends of the resistor R4; a resistor R3 and a relay switch S9 are connected in series between the CC2 line and the ground line;
the direct current interoperation control system is connected with all relay switches;
a fourth detection point is arranged on the CC1 line; a fifth detection point is provided on the CC2 line.
The voltage sensor or the current sensor is arranged on an alternating current line and a neutral line which are connected with the first electric energy metering module; a voltage sensor or a current sensor is arranged on a positive line and a negative line of a direct current power supply connected with the second electric energy module; and an AD sampling point is arranged on the CC2 line.
Correspondingly, the invention also provides a conduction charging simulation test method for the electric vehicle, which is realized by adopting the conduction charging simulation test system and is characterized by comprising the following steps:
step S10, preparing an electric vehicle for testing, and inserting a charging conduction testing system to slowly charge a gun or quickly charge a gun;
step S11, starting an upper computer test program corresponding to the relative position of the slow charging gun or the fast charging gun;
step S12, according to the upper computer test program, carrying out charging simulation test operation;
step S13, sending the charging information to a human-computer interaction interface;
and step S14, after the gun is pulled, the testing device is restored to the initial state, and the testing test is ended.
Wherein the step S12 further includes:
step S120, carrying out alternating current charging simulation test operation in a fixed sequence according to an upper computer test program; or/and
and step S121, carrying out direct current charging simulation test operation in a fixed sequence according to an upper computer test program.
Wherein the step S120 further comprises:
step S150, enabling the electric vehicle for testing to sleep, and enabling the alternating-current charging interoperation control module to control relay switches S1, S2, S3, S4, S5, S6 and S7 in the first relay switch device to be disconnected and enable a conduction charging testing system L1, N, PE, CC and CP to be disconnected; after the slow charging gun of the test system is inserted, the control system controls the first control switch K1 and the sixth relay switch S6 to be closed, adjusts the card value of a resistance board of a CC loop of the test system to a corresponding specified value and a boundary value, respectively simulates the full connection state of cable capacities 10A, 16A, 32A and 63A, if a charging message is normally sent out, the electric vehicle is in an awakened state, and continues the next step; otherwise, turning to step S13;
step S151, after the electric vehicle for the large test is dormant, the alternating current charging interoperation control module controls relay switches S1, S2, S3, S4, S5, S6 and S7 in the first relay switch device to be disconnected, after a slow charging gun of the system for the test is inserted, the first control switch K1 is controlled to be disconnected, the sixth relay switch S6 is closed, the clamping value of a resistance board of a CC loop of the test system is adjusted, resistance values of RC and R4 are continuously adjustable without breakpoints, the resistance values are stepped to 1 omega, corresponding specified values and boundary values are adjusted, half-connection states of cable capacities 10A, 16A, 32A and 63A are simulated respectively, and if a charging message is sent normally, the electric vehicle is in a wakened state and continues to the next step; otherwise, turning to step S13;
step S152, before charging, in a charging preparation stage and in a charging process of the electric vehicle, controlling switch relays S1, S2, S3, S4, S5, S6 and S7 to be in a closed state, controlling a first control switch K1 to be switched off, simulating disconnection of a vehicle interface CC, after setting a waiting time t, recovering the first control switch K1, recovering the CC, and if the voltage of a first detection point, the voltage between L and N, the current of an L port connecting line and the redundant time are in a normal range, enabling the electric vehicle to be in a charging state and continuing the next step; otherwise, turning to step S13;
step S153, in the charging process of the vehicle, the power supply control device is switched to a 12V normal power, after waiting for time t, the first relay switch S1 is switched to a signal generator PWM waveform, if the voltage of the first detection point, the voltage between L and N, the current of the L port connecting line and the redundant time are all processed in a normal range, the electric vehicle is in a charging state, and the next step is continued; otherwise, turning to step S13;
step S154, in the charging process of the vehicle, simulating that the power grid voltage 220V suddenly drops to 0V, after waiting for time t, recovering the power grid voltage 220V, and if the voltage of the first detection point, the voltage between L and N, the current of the L port connecting line and the redundant time are all in a normal range, keeping the electric vehicle in a charging state, and continuing the next step; otherwise, turning to step S13;
step S155, in the charging process of the vehicle, controlling relay switches S1, S2, S3, S4, S5, S6 and S7 to be switched off, after waiting for time t, recovering the relay switches to be switched on, and if the voltage at the first detection point, the voltage between L and N, the current of the L port connecting line and the redundant time are in a normal range, enabling the electric vehicle to be in a charging state; otherwise, the process goes to step S13.
Wherein the step S121 further includes:
step S160, the electric vehicle for testing sleeps, the relay switches S8, S9, S10, S11, S12, S13, S14, S15 and S16 are controlled to be disconnected, after the quick charging gun of the quick charging conduction testing system is inserted, the relay switches S11 and S12 are controlled to be closed to respectively provide 12V and 24V auxiliary power supplies, if a charging message is sent out, the electric vehicle is awakened, and the next step is continued; otherwise, turning to step S13;
step S161, preparing an electric vehicle for testing, controlling relay switches S8, S9, S10, S12, S13, S14, S15 and S16 to be closed, controlling an eleventh relay switch S11 to be opened, starting a testing system after a quick charging gun of the testing system is inserted, and if the voltage between DC + and DC-, the current of a DC + and DC-loop and the redundancy time are detected to be in normal ranges, enabling the testing system to be in a charging state and continuing the next step; otherwise, turning to step S13;
step S162, in the charging process of the vehicle, an end button of an upper computer display interface is used, after the test system judges that the BST message sent by the battery system of the electric vehicle is received, the quick charging is confirmed to be ended, relay switches S8, S9, S10, S11, S12, S13, S14, S15 and S16 are controlled to be disconnected, after waiting for time t, the relay switches are recovered to be closed, a charging start button of the upper computer display interface is started, if the voltages between DC + and DC-, the currents of a DC + loop and a DC loop and the redundancy time are detected to be in a normal range, the test system is in a charging state, and the next step is continued; otherwise, turning to step S13;
and step S163, in the charging process of the vehicle, the upper computer displays an end button of the interface, after the test system judges and receives the BST message sent by the battery system of the electric vehicle, the quick charging is confirmed to be ended, after waiting for time t, the charge start button of the upper computer display interface is clicked to start charging, and when the voltage, the current and the redundancy time between DC & lt + & gt and DC & gt are detected to be in a normal range, the test system is in a charging state.
If the voltage of the first detection point is more than or equal to 5.2V and less than or equal to U1 and less than or equal to 6.8V, the voltage U between L and N is more than or equal to 90V, the current I of the L port connecting line is more than or equal to 1A, and the redundant time tLNIf the time is more than or equal to 2s, the time is in a normal range; or
If the voltage U between DC + and DC-)dcCurrent I of more than or equal to 60V, DC + and DC-loopdcMore than or equal to 5A, redundant time tdcAnd the time is more than or equal to 2s, which indicates that the time is in the normal range.
The embodiment of the invention has the following beneficial effects:
the invention provides a conduction charging test system and a conduction charging test method for an electric vehicle, wherein the test system is compatible with conductivity tests of alternating current slow charging and direct current fast charging functions, covers all types of charging modes, has wide test coverage, saves the cost in alternating current interoperability test, and simultaneously ensures that the charging stability of the electric vehicle is higher; and the cost is saved, and the control is simple.
By implementing the invention, the alternating current charging interoperability test of the test system is realized by adding the relay switch at the port of the connecting line, controlling the drive circuit of the relay by the upper computer software, setting the relay switch and the closing time mode, and realizing different test items by closing different relays and connecting different resistance values in series to control the relay time, thereby further improving the compatibility and the stability of the alternating current charging.
By implementing the invention, the charging test capability of the electric vehicle can be improved, the conduction charging test efficiency of the electric vehicle can be rapidly improved, the development cycle of the charging function of the electric vehicle can be shortened, and the labor cost for testing the charging function of the electric vehicle can be saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is within the scope of the present invention for those skilled in the art to obtain other drawings based on the drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of an embodiment of a conduction charging test system for an electric vehicle according to the present invention;
FIG. 2 is a schematic diagram of the test system referenced in FIG. 1 using AC conduction charging;
FIG. 3 is a schematic diagram of the test system referenced in FIG. 1 using DC conduction charging;
fig. 4 is a main flow chart of an embodiment of a conduction charging test method for an electric vehicle according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, a schematic structural diagram of an embodiment of a conduction charging simulation test system for an electric vehicle according to the present invention is shown; referring to fig. 2 and fig. 3 together, in this embodiment, the present invention includes a whole vehicle charging simulation system and a measuring electric vehicle, wherein the whole vehicle charging simulation system includes:
the system comprises a controllable alternating current power supply, a first relay switch device and a second relay switch device, wherein the controllable alternating current power supply is used for providing a controllable alternating current power supply, and the output end of the controllable alternating current power supply is connected with the first relay switch device which is used for being connected with an alternating current charging port of an electric vehicle to be measured; specifically, the controllable alternating current power supply can control the amplitude and the frequency of the alternating current voltage;
the alternating current charging interoperation control module is connected with the controllable alternating current power supply and the first relay switch device and is used for controlling the on-off of each relay switch in the first relay switch device aiming at various types of alternating current charging equipment and acquiring detection data in a charging process; specifically, the alternating current charging interoperation control module can complete simulation and control related to alternating current guidance;
the controllable direct-current power supply is used for providing a controllable direct-current power supply, the output end of the controllable direct-current power supply is connected with a second relay switch device, and the second relay switch device is used for being connected with a direct-current charging port of the electric vehicle to be measured;
the direct-current charging interoperation control module is connected with the controllable direct-current power supply and the second relay switch device and used for controlling the on-off of each relay switch in the second relay switch device aiming at various types of direct-current charging equipment and acquiring detection data in a charging process; specifically, the direct-current charging interoperation control module can realize the function of performing rapid charging protocol communication interaction between a direct-current power supply and the electric vehicle, and complete various fault simulation operations;
the upper computer is internally provided with automatic test software for various types of alternating current charging equipment and direct current charging equipment and is used for controlling the alternating current charging interoperation control module or the direct current charging interoperation control module to carry out charging simulation test operation.
FIG. 2 is a schematic diagram of the test system using AC conduction charging as referred to in FIG. 1;
the controllable alternating current power supply receives the input of a three-phase five-wire alternating current source, and the output of the controllable alternating current power supply is connected with an electric energy metering module;
the three alternating current lines and the neutral line led out by the electric energy calculation module are respectively connected with a vehicle-mounted charger in the electric vehicle for measurement through four relay switches S1, S2, S3 and S4 of a first relay switch device;
the ground wire led out by the electric energy computing module is connected with the vehicle body ground through a fifth relay switch S5 in the first relay switch device;
the controllable direct-current power supply is at least provided with a power supply control device which is connected with a resistor RC through a first control switch K1, and the other end of the resistor RC is connected with a vehicle control device in the electric vehicle through a sixth relay switch (S6) in the first relay switch device; a resistor R4 is connected in parallel with two ends of the first control switch K1;
the alternating current charging interoperation control module at least comprises a power supply control device, the output end of the power supply control device is connected with the anode of a diode D1 through a seventh relay switch S7 in a first relay switch device, the cathode of the diode is respectively connected with the vehicle control device, the vehicle body ground through a resistor R3 and the vehicle body ground through a resistor R2 and a second control switch K2;
a first detection point is arranged between the power supply control device and the seventh relay switch S7; a second detection point is arranged at the cathode of the diode D1; a third detection point is provided between the sixth relay switch S6 and the vehicle control device.
The resistance values of the resistor RC and the resistor R4 are continuously adjustable, and the adjustment precision is less than or equal to 3%; the step value is 1 Ω, and is used to simulate the full connection state or the half connection state of the cable capacities 10A, 16A, 32A, and 63A by adjustment.
FIG. 3 is a schematic diagram of the test system using DC conduction charging as shown in FIG. 1;
in a specific example, the controllable dc power supply receives a three-phase five-wire ac source input, converts the input into a dc power supply, and outputs the dc power supply to the dc power supply output unit and the auxiliary power supply unit, respectively; the output end of the direct current power supply output unit is connected with an electric energy metering module;
the positive line and the negative line of the direct-current power supply led out by the electric energy calculation module are respectively connected with a battery pack in the electric vehicle for measurement through a fifteenth relay switch S15 and a sixteenth relay switch S16 of the second relay switch device;
the positive line of the direct current power supply is connected in series with a sixth resistor R6 and a sixth control switch K6 and is grounded; the negative line of the direct current power supply is connected in series with a seventh resistor R7 and a seventh control switch K7 and is connected with the ground in parallel; the ground is connected with the vehicle body ground of the electric vehicle for measurement through a tenth relay switch S10 of the second relay switch device;
the direct current interoperation control system leads out a plurality of output lines, and S +, S-, CC1 and CC2 lines are formed through four relay switches S13, S14, S8 and S9 of a second relay switch device and are connected with a vehicle controller in the electric vehicle for measurement;
the positive and negative power supplies output by the auxiliary power supply form A + and A-lines through two relay switches S11 and S12 respectively and are connected with a vehicle controller in the electric vehicle for measurement;
a resistor R4 is connected between the CC1 line and the ground line in series, and a resistor R2 and a fifth control switch K5 which are connected in series are connected in parallel at two ends of the resistor R4; a resistor R3 and a relay switch S9 are connected in series between the CC2 line and the ground line;
the direct current interoperation control system is connected with all relay switches;
a fourth detection point is arranged on the CC1 line; a fifth detection point is provided on the CC2 line.
The voltage sensor or the current sensor is arranged on an alternating current line and a neutral line which are connected with the first electric energy metering module; a voltage sensor or a current sensor is arranged on a positive line and a negative line of a direct current power supply connected with the second electric energy module; and an AD sampling point is arranged on the CC2 line.
Fig. 4 is a main flow chart illustrating an embodiment of a conductive charging test method for an electric vehicle according to the present invention. In this embodiment, the method is implemented by using the conduction charging simulation test system described in the foregoing fig. 1 to fig. 3, and the method includes the following steps:
step S10, preparing an electric vehicle for testing, and inserting a charging conduction testing system to slowly charge a gun or quickly charge a gun;
step S11, starting an upper computer test program corresponding to the relative position of the slow charging gun or the fast charging gun; specifically, the upper computer test program needs to meet the national standard test item GBT 34657.2-2017: electric vehicle conductive charging interoperability test specification section 2: a vehicle, tested in an alternating current or direct current charging interoperability sequence;
step S12, according to the upper computer test program, carrying out charging simulation test operation;
step S13, sending the charging information to a human-computer interaction interface;
and step S14, after the gun is pulled, the testing device is restored to the initial state, and the testing test is ended.
Wherein the step S12 further includes:
step S120, carrying out alternating current charging simulation test operation in a fixed sequence according to an upper computer test program; or/and
and step S121, carrying out direct current charging simulation test operation in a fixed sequence according to an upper computer test program.
In a first embodiment, a conduction charging test method for ac charging includes:
wherein the step S120 further comprises:
step S150 of making the test electric vehicle sleep, the ac charging interoperation control module controlling the relay switches S1, S2, S3, S4, S5, S6, and S7 in the first relay switch device to be turned off, and the conduction charging test system L1 (ac power supply), N (neutral line), PE (ground line), CC (charging connection confirmation), and CP (charging control confirmation) to be turned off; after the slow charging gun of the test system is inserted, the control system controls the first control switch K1 and the sixth relay switch S6 to be closed, the card value of a resistance board of a CC loop of the test system is adjusted to a corresponding specified value and a boundary value (meeting the A.3 in GB/T18287.1-2015), the full connection state of cable capacities 10A, 16A, 32A and 63A is simulated respectively, if a charging message is sent normally, the electric vehicle is in an awakened state, and the next step is continued; otherwise, turning to step S13;
step S151, after the electric vehicle for the large test is in a sleep state, the alternating current charging interoperation control module controls relay switches S1, S2, S3, S4, S5, S6 and S7 in the first relay switch device to be disconnected, after a slow charging gun of the system for the test is inserted, the first control switch K1 is controlled to be disconnected, the sixth relay switch S6 is closed, the clamping value of a resistance board of a CC loop of the test system is adjusted, the resistance values of RC and R4 are continuously adjustable without breakpoints, the resistance values are stepped to 1 omega, corresponding specified values and boundary values are adjusted (meeting the table A.3 in GB/T18287.1-2015), half-connection states of cable capacities 10A, 16A, 32A and 63A are simulated respectively, and if a charging message is sent normally, the electric vehicle is in an awakened state, and the next step is continued; otherwise, turning to step S13;
step S152, before charging, in a charging preparation stage and in a charging process of the electric vehicle, the control switch relays S1, S2, S3, S4, S5, S6 and S7 are in a closed state respectively, the first control switch K1 is controlled to be switched off, a vehicle interface CC is simulated to be switched off, after waiting time t is set, the first control switch K1 is recovered, the CC is recovered, if the voltage of a first detection point, the voltage between L and N, the current of an L port connecting line and redundancy time are all in a normal range, specifically, in one example, the voltage of the first detection point is 5.2V or more and U1 or less and 6.8V or less, the voltage between L and N is 90V or more, the current I of the L port connecting line is not less than 1A, and the redundancy time t is tLNIf the time is more than or equal to 2s, namely the time is in the normal range, the electric vehicle is in a charging state, and the next step is continued; otherwise, turning to step S13;
step S153, in the charging process of the vehicle, the power supply control device is switched to a 12V normal power, after waiting for time t, the first relay switch S1 is switched to a signal generator PWM waveform, if the voltage of the first detection point, the voltage between L and N, the current of the L port connecting line and the redundant time are all processed in a normal range (see the previous step), the electric vehicle is in a charging state, and the next step is continued; otherwise, turning to step S13; it is understood that in some examples, the waiting time t herein takes into account that the vehicle charging charger stops charging within 100ms, the vehicle charging charger responds, the vehicle charging charger wakes up for a holding time, and a sleep time, and the reference t may be set to 100ms, 1s, 60s, 150s, and 300 s.
Step S154, in the charging process of the vehicle, simulating that the power grid voltage 220V suddenly drops to 0V, after waiting for time t, recovering the power grid voltage 220V, and if the voltage of the first detection point, the voltage between L and N, the current of the L port connecting line and the redundant time are all in a normal range (see the previous step), keeping the electric vehicle in a charging state, and continuing the next step; otherwise, turning to step S13; it can be understood that the waiting time t in this step needs to consider the shortest response time of the vehicle-mounted charger when the power grid drops, and the time t can refer to that the power grid voltage drops by 100% for 10ms, 60% for 200ms, and 30% for 1 s.
Step S155, in the charging process of the vehicle, controlling relay switches S1, S2, S3, S4, S5, S6 and S7 to be switched off, after waiting for time t, recovering the relay switches to be switched on, and if the voltage at the first detection point, the voltage between L and N, the current of the L port connecting line and the redundant time are in a normal range, enabling the electric vehicle to be in a charging state; otherwise, the process goes to step S13. It is understood that the waiting time t in this step may be the same as that in step S153.
Embodiment two, conduction charging test method for dc charging:
wherein the step S121 further includes:
step S160, the electric vehicle for testing sleeps, the relay switches S8, S9, S10, S11, S12, S13, S14, S15 and S16 are controlled to be disconnected, after the quick charging gun of the quick charging conduction testing system is inserted, the relay switches S11 and S12 are controlled to be closed to respectively provide 12V and 24V auxiliary power supplies, if a charging message is sent out, the electric vehicle is awakened, and the next step is continued; otherwise, turning to step S13;
step S161, preparing an electric vehicle for testing, controlling relay switches S8, S9, S10, S12, S13, S14, S15 and S16 to be closed, controlling an eleventh relay switch S11 to be opened, starting a testing system after a quick charging gun of the testing system is inserted, and if the voltage between DC + and DC-, the current of a DC + and DC-loop and the redundancy time are detected to be in normal ranges, enabling the testing system to be in a charging state and continuing the next step; otherwise, turning to step S13;
step S162, in the charging process of the vehicle, displaying an end button of an interface by the upper computer, after judging and receiving a BST message sent by a battery system of the electric vehicle by the test system, confirming the end of quick charging, controlling relay switches S8, S9, S10, S11, S12, S13, S14, S15 and S16 to be disconnected, after waiting for time t, restoring the relay switches to be closed, starting a charging start button of the display interface of the upper computer, and if the voltage between DC + and DC-, the current of a DC + and a DC-loop and the redundant time are detected to be in a normal range, specifically, in one example, if the voltage between DC + and DC-is detected to be UdcCurrent I of more than or equal to 60V, DC + and DC-loopdcMore than or equal to 5A, redundant time tdcIf the time is more than or equal to 2s, the state is in a normal range, the test system is in a charging state, and the next step is continued; otherwise, turning to step S13; it can be understood that the waiting time t in this step, which needs to be considered as the normal sleeping time of the electric vehicle, can be awakened to resume charging, and the reference time can be set to 1s, 60s, 150s, 300 s;
step S163, in the charging process of the vehicle, the upper computer displays the end button of the interface, the testing system determines that the BST message sent by the battery system of the electric vehicle is received, confirms that the quick charging is ended, after waiting for time t, clicks the charging start button of the upper computer display interface, starts the charging, detects that the voltage, the current and the redundancy time between DC + and DC-are in the normal range, specifically, in one example, if the voltage U between DC + and DC-is detecteddcCurrent I of more than or equal to 60V, DC + and DC-loopdcMore than or equal to 5A, redundant time tdcAnd if the time is more than or equal to 2s, the state is in a normal range, and the test system is in a charging state. It is to be understood that the waiting time t in this step may be the same as that in step S162.
For more details, reference may be made to the foregoing description of fig. 1 to 3, which is not repeated herein.
The embodiment of the invention has the following beneficial effects:
the invention provides a conduction charging test system and a conduction charging test method for an electric vehicle, wherein the test system is compatible with conductivity tests of alternating current slow charging and direct current fast charging functions, covers all types of charging modes, has wide test coverage, saves the cost in alternating current interoperability test, and simultaneously ensures that the charging stability of the electric vehicle is higher; and the cost is saved, and the control is simple.
By implementing the invention, the alternating current charging interoperability test of the test system is realized by adding the relay switch at the port of the connecting line, controlling the drive circuit of the relay by the upper computer software, setting the relay switch and the closing time mode, and realizing different test items by closing different relays and connecting different resistance values in series to control the relay time, thereby further improving the compatibility and the stability of the alternating current charging.
By implementing the invention, the charging test capability of the electric vehicle can be improved, the conduction charging test efficiency of the electric vehicle can be rapidly improved, the development cycle of the charging function of the electric vehicle can be shortened, and the labor cost for testing the charging function of the electric vehicle can be saved.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. 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 diagram block or blocks.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (10)
1. The utility model provides a conduction simulation test system that charges for electric vehicle which characterized in that, charges analog system and measures including whole car and uses electric vehicle, its characterized in that, wherein:
the whole vehicle charging simulation system comprises:
the system comprises a controllable alternating current power supply, a first relay switch device and a second relay switch device, wherein the controllable alternating current power supply is used for providing a controllable alternating current power supply, and the output end of the controllable alternating current power supply is connected with the first relay switch device which is used for being connected with an alternating current charging port of an electric vehicle to be measured;
the alternating current charging interoperation control module is connected with the controllable alternating current power supply and the first relay switch device and is used for controlling the on-off of each relay switch in the first relay switch device aiming at various types of alternating current charging equipment and acquiring detection data in a charging process;
the controllable direct-current power supply is used for providing a controllable direct-current power supply, the output end of the controllable direct-current power supply is connected with a second relay switch device, and the second relay switch device is used for being connected with a direct-current charging port of the electric vehicle to be measured;
the direct-current charging interoperation control module is connected with the controllable direct-current power supply and the second relay switch device and used for controlling the on-off of each relay switch in the second relay switch device aiming at various types of direct-current charging equipment and acquiring detection data in a charging process;
and the upper computer is internally provided with automatic test software aiming at various types of alternating current charging equipment and direct current charging equipment and used for controlling the alternating current charging interoperation control module or the direct current charging interoperation control module to carry out charging simulation test operation.
2. The system of claim 1, wherein:
the controllable alternating current power supply receives the input of a three-phase five-wire alternating current source, and the output of the controllable alternating current power supply is connected with an electric energy metering module;
the three alternating current lines and the neutral line led out by the electric energy calculation module are respectively connected with a vehicle-mounted charger in the electric vehicle for measurement through four relay switches S1, S2, S3 and S4 of a first relay switch device;
the ground wire led out by the electric energy computing module is connected with the vehicle body ground through a fifth relay switch S5 in the first relay switch device;
the controllable direct-current power supply is at least provided with a power supply control device which is connected with a resistor RC through a first control switch K1, and the other end of the resistor RC is connected with a vehicle control device in the electric vehicle through a sixth relay switch (S6) in the first relay switch device; a resistor R4 is connected in parallel with two ends of the first control switch K1;
the alternating current charging interoperation control module at least comprises a power supply control device, the output end of the power supply control device is connected with the anode of a diode D1 through a seventh relay switch S7 in a first relay switch device, the cathode of the diode is respectively connected with the vehicle control device, the vehicle body ground through a resistor R3 and the vehicle body ground through a resistor R2 and a second control switch K2;
a first detection point is arranged between the power supply control device and the seventh relay switch S7; a second detection point is arranged at the cathode of the diode D1; a third detection point is provided between the sixth relay switch S6 and the vehicle control device.
3. The system of claim 2, wherein the resistance values of the resistor RC and the resistor R4 are continuously adjustable, and the adjustment precision is less than or equal to 3%; the step value is 1 Ω, and is used to simulate the full connection state or the half connection state of the cable capacities 10A, 16A, 32A, and 63A by adjustment.
4. A system according to any one of claims 1 to 3, wherein:
the controllable direct-current power supply receives three-phase five-wire alternating-current source input, converts the three-phase five-wire alternating-current source input into a direct-current power supply and respectively outputs the direct-current power supply to the direct-current power supply output unit and the auxiliary power supply unit; the output end of the direct current power supply output unit is connected with an electric energy metering module;
the positive line and the negative line of the direct-current power supply led out by the electric energy calculation module are respectively connected with a battery pack in the electric vehicle for measurement through a fifteenth relay switch S15 and a sixteenth relay switch S16 of the second relay switch device;
the positive line of the direct current power supply is connected in series with a sixth resistor R6 and a sixth control switch K6 and is grounded; the negative line of the direct current power supply is connected in series with a seventh resistor R7 and a seventh control switch K7 and is connected with the ground in parallel; the ground is connected with the vehicle body ground of the electric vehicle for measurement through a tenth relay switch S10 of the second relay switch device;
the direct current interoperation control system leads out a plurality of output lines, and S +, S-, CC1 and CC2 lines are formed through four relay switches S13, S14, S8 and S9 of a second relay switch device and are connected with a vehicle controller in the electric vehicle for measurement;
the positive and negative power supplies output by the auxiliary power supply form A + and A-lines through two relay switches S11 and S12 respectively and are connected with a vehicle controller in the electric vehicle for measurement;
a resistor R4 is connected between the CC1 line and the ground line in series, and a resistor R2 and a fifth control switch K5 which are connected in series are connected in parallel at two ends of the resistor R4; a resistor R3 and a relay switch S9 are connected in series between the CC2 line and the ground line;
the direct current interoperation control system is connected with all relay switches;
a fourth detection point is arranged on the CC1 line; a fifth detection point is provided on the CC2 line.
5. The system of claim 4, wherein a voltage sensor or a current sensor is arranged on an alternating current line and a neutral line connected with the first electric energy metering module; a voltage sensor or a current sensor is arranged on a positive line and a negative line of a direct current power supply connected with the second electric energy metering module; and an AD sampling point is arranged on the CC2 line.
6. A conduction charging simulation test method for an electric vehicle, which is implemented using the conduction charging simulation test system according to any one of claims 1 to 5, characterized by comprising the steps of:
step S10, preparing an electric vehicle for testing, and inserting a charging conduction testing system to slowly charge a gun or quickly charge a gun;
step S11, starting an upper computer test program corresponding to the relative position of the slow charging gun or the fast charging gun;
step S12, according to the upper computer test program, carrying out charging simulation test operation;
step S13, sending the charging information to a human-computer interaction interface;
and step S14, after the gun is pulled, the testing device is restored to the initial state, and the testing test is ended.
7. The method of claim 6, wherein the step S12 further comprises:
step S120, carrying out alternating current charging simulation test operation in a fixed sequence according to an upper computer test program; or/and
and step S121, carrying out direct current charging simulation test operation in a fixed sequence according to an upper computer test program.
8. The method of claim 7, wherein the step S120 further comprises:
step S150 of sleeping the test electric vehicle, controlling the relay switches S1, S2, S3, S4, S5, S6, and S7 in the first relay switch device to be turned off, and turning off the conduction charging test system L1, N, PE, CC, and CP; after the slow charging gun of the test system is inserted, controlling the first control switch K1 and the sixth relay switch S6 to be closed, adjusting the card value of a resistance board of a CC loop of the test system to a corresponding specified value and a boundary value, respectively simulating the full connection state of cable capacities 10A, 16A, 32A and 63A, if a charging message is normally sent out, enabling the electric vehicle to be in an awakened state, and continuing the next step; otherwise, turning to step S13;
step S151, after the electric vehicle for testing is made to sleep, relay switches S1, S2, S3, S4, S5, S6 and S7 in the first relay switch device are controlled to be disconnected, after a slow charging gun of a system for testing is inserted, a first control switch K1 is controlled to be disconnected, a sixth relay switch S6 is controlled to be closed, the clamping value of a CC loop resistance board of the testing system is adjusted, the resistance values of RC and R4 are continuously adjustable without breakpoints, step is 1 omega, corresponding specified values and boundary values are adjusted, half-connection states of cable capacities 10A, 16A, 32A and 63A are respectively simulated, if a charging message is normally sent out, the electric vehicle is in a wakened state, and the next step is continued; otherwise, turning to step S13;
step S152, before charging, in a charging preparation stage and in a charging process of the electric vehicle, controlling switch relays S1, S2, S3, S4, S5, S6 and S7 to be in a closed state, controlling a first control switch K1 to be switched off, simulating disconnection of a vehicle interface CC, after setting a waiting time t, recovering the first control switch K1, recovering the CC, and if the voltage of a first detection point, the voltage between L and N, the current of an L port connecting line and the redundant time are in a normal range, enabling the electric vehicle to be in a charging state and continuing the next step; otherwise, turning to step S13;
step S153, in the charging process of the vehicle, the power supply is switched to 12V normal power, after waiting for time t, the first relay switch S1 is switched to a signal generator PWM waveform, if the voltage of a first detection point, the voltage between L and N, the current of an L port connecting line and the redundant time are all processed in a normal range, the electric vehicle is in a charging state, and the next step is continued; otherwise, turning to step S13;
step S154, in the charging process of the vehicle, simulating that the power grid voltage 220V suddenly drops to 0V, after waiting for time t, recovering the power grid voltage 220V, and if the voltage of the first detection point, the voltage between L and N, the current of the L port connecting line and the redundant time are all in a normal range, keeping the electric vehicle in a charging state, and continuing the next step; otherwise, turning to step S13;
step S155, in the charging process of the vehicle, controlling relay switches S1, S2, S3, S4, S5, S6 and S7 to be switched off, after waiting for time t, recovering the relay switches to be switched on, and if the voltage at the first detection point, the voltage between L and N, the current of the L port connecting line and the redundant time are in a normal range, enabling the electric vehicle to be in a charging state; otherwise, the process goes to step S13.
9. The method of claim 7, wherein the step S121 further comprises:
step S160, the electric vehicle for testing sleeps, the relay switches S8, S9, S10, S11, S12, S13, S14, S15 and S16 are controlled to be disconnected, after the quick charging gun of the quick charging conduction testing system is inserted, the relay switches S11 and S12 are controlled to be closed to respectively provide 12V and 24V auxiliary power supplies, if a charging message is sent out, the electric vehicle is awakened, and the next step is continued; otherwise, turning to step S13;
step S161, preparing an electric vehicle for testing, controlling relay switches S8, S9, S10, S12, S13, S14, S15 and S16 to be closed, controlling an eleventh relay switch S11 to be opened, starting a testing system after a quick charging gun of the testing system is inserted, and if the voltage between DC + and DC-, the current of a DC + and DC-loop and the redundancy time are detected to be in normal ranges, enabling the testing system to be in a charging state and continuing the next step; otherwise, turning to step S13;
step S162, in the charging process of the vehicle, an end button of an upper computer display interface is used, after the test system judges that the BST message sent by the battery system of the electric vehicle is received, the quick charging is confirmed to be ended, relay switches S8, S9, S10, S11, S12, S13, S14, S15 and S16 are controlled to be disconnected, after waiting for time t, the relay switches are recovered to be closed, a charging start button of the upper computer display interface is started, if the voltages between DC + and DC-, the currents of a DC + loop and a DC loop and the redundancy time are detected to be in a normal range, the test system is in a charging state, and the next step is continued; otherwise, turning to step S13;
and step S163, in the charging process of the vehicle, the upper computer displays an end button of the interface, after the test system judges and receives the BST message sent by the battery system of the electric vehicle, the quick charging is confirmed to be ended, after waiting for time t, the charge start button of the upper computer display interface is clicked to start charging, and when the voltage, the current and the redundancy time between DC & lt + & gt and DC & gt are detected to be in a normal range, the test system is in a charging state.
10. The method of claim 8 or 9, wherein:
if the voltage of the first detection point is more than or equal to 5.2V and less than or equal to U1 and less than or equal to 6.8V, the voltage U between L and N is more than or equal to 90V, and the current I of the L port connecting line is more than or equal to1A, redundant time tLNIf the time is more than or equal to 2s, the time is in a normal range; or
If the voltage U between DC + and DC-)dcCurrent I of more than or equal to 60V, DC + and DC-loopdcMore than or equal to 5A, redundant time tdcAnd the time is more than or equal to 2s, which indicates that the time is in the normal range.
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Effective date of registration: 20220105 Address after: 511434 No. 36, Longying Road, Shilou Town, Panyu District, Guangzhou City, Guangdong Province Applicant after: GAC AION New Energy Vehicle Co.,Ltd. Address before: 23rd floor, Chengyue building, No. 448-458, Dongfeng Middle Road, Yuexiu District, Guangzhou City, Guangdong Province 510030 Applicant before: GUANGZHOU AUTOMOBILE GROUP Co.,Ltd. |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201211 |