CN111158345A - Automatic detection method for undervoltage current limiting of electric vehicle controller - Google Patents
Automatic detection method for undervoltage current limiting of electric vehicle controller Download PDFInfo
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- CN111158345A CN111158345A CN202010030235.0A CN202010030235A CN111158345A CN 111158345 A CN111158345 A CN 111158345A CN 202010030235 A CN202010030235 A CN 202010030235A CN 111158345 A CN111158345 A CN 111158345A
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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
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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
- G05B23/0218—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterised by the fault detection method dealing with either existing or incipient faults
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
- Y02T90/167—Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S30/00—Systems supporting specific end-user applications in the sector of transportation
- Y04S30/10—Systems supporting the interoperability of electric or hybrid vehicles
- Y04S30/12—Remote or cooperative charging
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses an automatic detection method for undervoltage current limiting of an electric vehicle controller, which comprises the steps of obtaining a first voltage value of a shunt circuit of an electric vehicle controller parallel electric appliance element, and comparing the first voltage value with a first undervoltage threshold value stored in a database in advance; acquiring a second voltage value of a main circuit of a series electric element of the electric vehicle controller, and comparing the second voltage value with a second undervoltage threshold value stored in a database in advance; detecting a power supply switching signal, acquiring a third voltage value of an analog-to-digital conversion lead angle switched to the standby battery, and comparing the third voltage value with a third undervoltage threshold value pre-stored in a database; and if the third voltage value is detected to be smaller than the undervoltage warning threshold value, outputting charging prompt information. Automatic detection and comparison under different situations are realized, the circuit voltage is adjusted, the transmission accuracy is ensured, and the detection efficiency is improved.
Description
Technical Field
The invention relates to the technical field of detection of electric vehicle controllers, in particular to an automatic detection method for under-voltage current limiting of an electric vehicle controller.
Background
The electric vehicle controller is a core control device used for controlling the starting, running, advancing and retreating, speed and stopping of a motor of an electric vehicle and other electronic devices of the electric vehicle, is like the brain of the electric vehicle, and is an important part on the electric vehicle. The accuracy of data output is an important factor directly determining whether the electric vehicle controller is accurate, and therefore, it is necessary to ensure the accuracy of the voltage and current values of the electric vehicle controller. In the prior art, the voltage value of the electric vehicle controller is manually detected by adopting a detection tool, and the detection efficiency is low.
Disclosure of Invention
The invention aims to provide an automatic detection method for undervoltage current limiting of an electric vehicle controller, which can automatically detect voltage values under different situations for comparison, adjust circuit voltage, ensure transmission accuracy and improve detection efficiency.
In order to achieve the above object, the present invention provides an automatic detection method for under-voltage current limiting of an electric vehicle controller, comprising:
acquiring a first voltage value of a parallel electrical component branch circuit of the electric vehicle controller, and comparing the first voltage value with a first undervoltage threshold value pre-stored in a database;
acquiring a second voltage value of a main circuit of a series electric element of the electric vehicle controller, and comparing the second voltage value with a second undervoltage threshold value stored in a database in advance;
detecting a power supply switching signal, acquiring a third voltage value of an analog-to-digital conversion lead angle switched to the standby battery, and comparing the third voltage value with a third undervoltage threshold value pre-stored in a database;
and if the third voltage value is detected to be smaller than the undervoltage warning threshold value, outputting charging prompt information.
In one embodiment, obtaining a first voltage value of a shunt circuit of an electrical component connected in parallel to an electric vehicle controller, and comparing the first voltage value with a first under-voltage threshold value pre-stored in a database specifically includes:
if the first voltage value is smaller than or equal to the first under-voltage threshold value, outputting a controller total circuit voltage adjustment instruction;
and if the first voltage value is larger than the first under-voltage threshold value, outputting a voltage error feedback signal to a controller circuit to control the voltage to be stable.
In an embodiment, obtaining a second voltage value of a main circuit of a series electrical component of an electric vehicle controller, and comparing the second voltage value with a second under-voltage threshold value pre-stored in a database specifically includes:
if the second voltage value is smaller than or equal to the second undervoltage threshold value, outputting a controller main circuit and branch circuit adjusting instruction;
and if the second voltage value is larger than the second undervoltage threshold value, outputting a voltage error feedback signal to a controller circuit to control the voltage to be stable.
In an embodiment, the detecting the power switching signal, obtaining a third voltage value of the ad conversion lead angle switched to the backup battery, and comparing the third voltage value with a third under-voltage threshold value pre-stored in the database specifically includes:
if the third voltage value is smaller than or equal to the third undervoltage threshold value, outputting a disconnection instruction to a standby battery relay switch;
if the third voltage value is greater than the third under-voltage threshold, detecting whether the third voltage value is less than an under-voltage warning threshold.
In an embodiment, after detecting that the third voltage value is smaller than the under-voltage warning threshold value and outputting the charging prompt information, the method further includes:
and outputting power failure information if the third voltage value is detected to be smaller than the charging threshold value within a first preset time range.
In an embodiment, after detecting that the third voltage value is smaller than the under-voltage warning threshold value and outputting the charging prompt information, the method further includes:
and if the third voltage value is detected to be equal to the saturation threshold within a second preset time range, outputting charging completion information.
In an embodiment, the method further comprises:
obtaining a shunt current value of a parallel electric appliance element of an electric vehicle controller, and judging whether the shunt current value is greater than a first preset instantaneous current value or not;
if yes, outputting a transistor conduction shunt adjustment instruction connected with the shunt circuit of the parallel electrical element;
if not, outputting a voltage error feedback signal to the controller circuit to control the voltage to be stable.
In an embodiment, the method further comprises:
acquiring a main current value of a series electric element of an electric vehicle controller, and judging whether the main current value is greater than a second preset instantaneous current value;
if so, outputting an adjustable resistance increasing resistance value adjusting instruction connected with the main circuit;
if not, outputting a voltage error feedback signal to the controller circuit to control the voltage to be stable.
In an embodiment, the method further comprises:
collecting a first temperature value of a parallel electric element of a controller circuit, and judging whether the first temperature value is greater than a first alarm threshold value;
if yes, outputting a disconnection instruction to a shunt relay switch;
if not, outputting a voltage error feedback signal to the controller circuit to control the voltage to be stable.
In an embodiment, the method further comprises:
acquiring a second temperature value of the electric appliance element connected in series with the controller circuit, and judging whether the second temperature value is greater than a second alarm threshold value;
if yes, outputting a disconnection instruction to the power switch;
if not, outputting a voltage error feedback signal to the controller circuit to control the voltage to be stable.
The invention relates to an automatic detection method for undervoltage current limiting of an electric vehicle controller, which is characterized in that a first voltage value of a branch circuit of an electric vehicle controller parallel electric element is obtained and is compared with a first undervoltage threshold value pre-stored in a database; acquiring a second voltage value of a main circuit of a series electric element of the electric vehicle controller, and comparing the second voltage value with a second undervoltage threshold value stored in a database in advance; detecting a power supply switching signal, acquiring a third voltage value of an analog-to-digital conversion lead angle switched to the standby battery, and comparing the third voltage value with a third undervoltage threshold value pre-stored in a database; and if the third voltage value is detected to be smaller than the undervoltage warning threshold value, outputting charging prompt information. Automatic detection and comparison under different situations are realized, the circuit voltage is adjusted, the transmission accuracy is ensured, and the detection efficiency is improved.
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 described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of an automatic detection method for undervoltage current limiting of an electric vehicle controller according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of step S101 according to an embodiment of the present invention;
fig. 3 is a schematic flowchart of step S102 according to an embodiment of the present invention;
fig. 4 is a schematic specific flowchart of step S103 according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
Referring to fig. 1, fig. 1 is a schematic flow chart of an automatic detection method for under-voltage current limiting of an electric vehicle controller according to an embodiment of the present invention. Specifically, the method for automatically detecting the undervoltage current limit of the electric vehicle controller may include the following steps:
s101, a first voltage value of a shunt circuit of an electric appliance element connected in parallel with the electric vehicle controller is obtained and compared with a first under-voltage threshold value stored in a database in advance.
In the embodiment of the invention, under-voltage means insufficient voltage, and for all electrical equipment, the voltage has a rated voltage, but in practice, the operation under the rated voltage cannot be completely guaranteed, and the voltage is a range near the rated voltage. Referring to fig. 2, the electric vehicle controller circuit has a parallel circuit and a series circuit, the parallel connection is a connection mode between electrical components, and is characterized in that 2 similar or dissimilar components, devices and the like are connected end to end, and simultaneously, the end and the tail are also connected. The terminal voltages of the electrical components of the parallel circuit are the same voltage. If the first voltage value is smaller than or equal to the first under-voltage threshold value, outputting a controller total circuit voltage adjustment instruction; the undervoltage phenomenon is generated, the power consumption requirement cannot be met, and the power consumption requirement is met by adjusting the voltage of the circuit to a normal range value. And if the first voltage value is larger than the first under-voltage threshold value, outputting a voltage error feedback signal to a controller circuit to control the voltage to be stable. The normal power utilization requirement of the controller is guaranteed. Power supply equipment often has transient voltage events that can cause significant damage to the electronics receiving power from the power supply equipment. Obtaining a shunt current value of a parallel electric appliance element of an electric vehicle controller, and judging whether the shunt current value is greater than a first preset instantaneous current value or not; if yes, outputting a transistor conduction shunt adjustment instruction connected with the shunt circuit of the parallel electrical element; if not, outputting a voltage error feedback signal to the controller circuit to control the voltage to be stable. The transistor is a solid semiconductor device, as a variable current switch, can be based on input voltage control output current, and different from ordinary mechanical switch, the transistor utilizes the electrical signal to control self opening and shutting, and switching speed is very fast, and switching speed can reach more than 100GHz, and the transistor switches on and can shunt, with heavy current ground connection, avoids instantaneous voltage electric current too big and damages electrical components.
S102, a second voltage value of a main circuit of a series electric appliance element of the electric vehicle controller is obtained and compared with a second undervoltage threshold value stored in a database in advance.
In the embodiment of the present invention, please refer to fig. 3, the series connection is one of the basic ways to connect the circuit elements. The circuit elements are sequentially connected end to end one by one, and the total voltage of the electrical elements after being connected in series is the sum of the terminal voltages of all the electrical elements. If the second voltage value is smaller than or equal to the second undervoltage threshold value, outputting a controller main circuit and branch circuit adjusting instruction; the undervoltage phenomenon happens, and the circuit voltage is adjusted to a normal value to meet the power utilization requirement of the electric vehicle controller; and if the second voltage value is larger than the second undervoltage threshold value, outputting a voltage error feedback signal to a controller circuit to control the voltage to be stable. The normal power utilization requirement of the controller is guaranteed. Acquiring a main current value of a series electric element of an electric vehicle controller, and judging whether the main current value is greater than a second preset instantaneous current value; if so, outputting an adjustable resistance increasing resistance value adjusting instruction connected with the main circuit; if not, outputting a voltage error feedback signal to the controller circuit to control the voltage to be stable. When the transient voltage phenomenon occurs in the series circuit, the currents of the series circuit are equal, the resistance value of the adjustable resistor can be increased, the current of the circuit is reduced, the electric appliance elements are prevented from being broken down due to overlarge currents, the cost is increased, and even safety accidents are caused.
S103, detecting a power supply switching signal, acquiring a third voltage value of an analog-to-digital conversion lead angle switched to the standby battery, and comparing the third voltage value with a third undervoltage threshold value stored in a database in advance.
In the embodiment of the invention, when the power supply grid of the electric vehicle controller is abnormal, such as sudden power failure or insufficient voltage, a certain damage may be caused to a power device in the circuit, or the electric power of the electric vehicle controller is used up, the standby battery is started to supply power. Referring to fig. 4, if the third voltage value is less than or equal to the third undervoltage threshold, a turn-off command is output to the battery backup relay switch; namely, the voltage of the standby battery is not enough to supply power to the electric vehicle controller, the standby battery is stopped to supply power, and the electric appliance elements are prevented from being damaged due to undervoltage. If the third voltage value is greater than the third under-voltage threshold, detecting whether the third voltage value is less than an under-voltage warning threshold. The standby battery voltage is enough to supply power to the electric vehicle controller, the electric vehicle controller is supplied with power, and meanwhile, whether the third voltage value is smaller than the under-voltage warning threshold value or not is detected, and the under-voltage warning threshold value is a voltage value supporting the electric vehicle controller to operate to the next charging pile. The probability of midway breakdown of the electric vehicle is reduced.
And S104, outputting charging prompt information when detecting that the third voltage value is smaller than the undervoltage warning threshold value.
In the embodiment of the invention, the standby battery is not enough to support the power supply of the electric vehicle controller, the charging prompt information is output to remind a driver of charging operation, and the influence of insufficient power supply on the driving safety is avoided. In addition, if the third voltage value is detected to be smaller than the charging threshold value within the first preset time range, power failure information is output. The charging quantity is not improved in a time period, which indicates that the power supply equipment of the electric vehicle controller is in fault, and the power supply fault information is output to prompt a driver to pay attention to maintenance, so that safe driving is realized. In addition, if the third voltage value is detected to be equal to the saturation threshold within a second preset time range, charging completion information is output. Namely, the charging amount is saturated in a time period, the third voltage value does not rise any more, the charging is completed, the charging completion information is output, the driver is prompted to pay attention to stopping the charging operation, the charging equipment is prevented from being damaged, and meanwhile, the time and the economic cost are increased. In addition, when the standby battery supplies power or the electric vehicle controller supplies power by a correct power supply, acquiring a first temperature value of a parallel electric appliance element of the controller circuit, and judging whether the first temperature value is greater than a first alarm threshold value; if yes, outputting a disconnection instruction to a shunt relay switch; if not, outputting a voltage error feedback signal to the controller circuit to control the voltage to be stable. The method comprises the steps of detecting a first temperature value of an electrical element in a parallel circuit, if the first temperature value is larger than a first alarm threshold value, enabling a voltage value in the circuit to be high, easily breaking down the electrical element, even causing a safety accident, controlling a relay switch corresponding to a shunt circuit to act, and disconnecting the circuit. Acquiring a second temperature value of the electric appliance element connected in series with the controller circuit, and judging whether the second temperature value is greater than a second alarm threshold value; if yes, outputting a disconnection instruction to the power switch; if not, outputting a voltage error feedback signal to the controller circuit to control the voltage to be stable. The second temperature value of the electrical components in the series circuit is detected, and if the second temperature value is larger than the second alarm threshold value, the voltage value in the circuit is high, the electrical components are easy to break down, and even safety accidents are caused. The detection is carried out on the electrical components of different circuits, the voltage conditions under different situations are detected more accurately, timely adjustment is made, and the detection efficiency is improved.
The invention relates to an automatic detection method for undervoltage current limiting of an electric vehicle controller, which is characterized in that a first voltage value of a branch circuit of an electric vehicle controller parallel electric element is obtained and is compared with a first undervoltage threshold value pre-stored in a database; acquiring a second voltage value of a main circuit of a series electric element of the electric vehicle controller, and comparing the second voltage value with a second undervoltage threshold value stored in a database in advance; detecting a power supply switching signal, acquiring a third voltage value of an analog-to-digital conversion lead angle switched to the standby battery, and comparing the third voltage value with a third undervoltage threshold value pre-stored in a database; and if the third voltage value is detected to be smaller than the undervoltage warning threshold value, outputting charging prompt information. Automatic detection and comparison under different situations are realized, the circuit voltage is adjusted, the transmission accuracy is ensured, and the detection efficiency is improved.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. An automatic detection method for undervoltage current limiting of an electric vehicle controller is characterized by comprising the following steps:
acquiring a first voltage value of a parallel electrical component branch circuit of the electric vehicle controller, and comparing the first voltage value with a first undervoltage threshold value pre-stored in a database;
acquiring a second voltage value of a main circuit of a series electric element of the electric vehicle controller, and comparing the second voltage value with a second undervoltage threshold value stored in a database in advance;
detecting a power supply switching signal, acquiring a third voltage value of an analog-to-digital conversion lead angle switched to the standby battery, and comparing the third voltage value with a third undervoltage threshold value pre-stored in a database;
and if the third voltage value is detected to be smaller than the undervoltage warning threshold value, outputting charging prompt information.
2. The method for automatically detecting under-voltage current-limiting of an electric vehicle controller according to claim 1, wherein the step of obtaining a first voltage value of a shunt circuit of an electric vehicle controller parallel electric component and comparing the first voltage value with a first under-voltage threshold value pre-stored in a database comprises the steps of:
if the first voltage value is smaller than or equal to the first under-voltage threshold value, outputting a controller total circuit voltage adjustment instruction;
and if the first voltage value is larger than the first under-voltage threshold value, outputting a voltage error feedback signal to a controller circuit to control the voltage to be stable.
3. The method for automatically detecting under-voltage current-limiting of an electric vehicle controller according to claim 2, wherein obtaining a second voltage value of a main circuit of a series electric device element of the electric vehicle controller, and comparing the second voltage value with a second under-voltage threshold value pre-stored in a database, specifically comprises:
if the second voltage value is smaller than or equal to the second undervoltage threshold value, outputting a controller main circuit and branch circuit adjusting instruction;
and if the second voltage value is larger than the second undervoltage threshold value, outputting a voltage error feedback signal to a controller circuit to control the voltage to be stable.
4. The method according to claim 3, wherein detecting the power switching signal, obtaining a third voltage value of the ad conversion lead angle switched to the backup battery, and comparing the third voltage value with a third under-voltage threshold pre-stored in a database includes:
if the third voltage value is smaller than or equal to the third undervoltage threshold value, outputting a disconnection instruction to a standby battery relay switch;
if the third voltage value is greater than the third under-voltage threshold, detecting whether the third voltage value is less than an under-voltage warning threshold.
5. The method of claim 1, wherein after the third voltage value is detected to be less than the under-voltage warning threshold value and a charging prompt message is output, the method further comprises:
and outputting power failure information if the third voltage value is detected to be smaller than the charging threshold value within a first preset time range.
6. The method of claim 1, wherein after the third voltage value is detected to be less than the under-voltage warning threshold value and a charging prompt message is output, the method further comprises:
and if the third voltage value is detected to be equal to the saturation threshold within a second preset time range, outputting charging completion information.
7. The method for automatically detecting under-voltage current limit of an electric vehicle controller according to claim 1, wherein the method further comprises:
obtaining a shunt current value of a parallel electric appliance element of an electric vehicle controller, and judging whether the shunt current value is greater than a first preset instantaneous current value or not;
if yes, outputting a transistor conduction shunt adjustment instruction connected with the shunt circuit of the parallel electrical element;
if not, outputting a voltage error feedback signal to the controller circuit to control the voltage to be stable.
8. The method for automatically detecting under-voltage current limit of an electric vehicle controller according to claim 7, wherein the method further comprises:
acquiring a main current value of a series electric element of an electric vehicle controller, and judging whether the main current value is greater than a second preset instantaneous current value;
if so, outputting an adjustable resistance increasing resistance value adjusting instruction connected with the main circuit;
if not, outputting a voltage error feedback signal to the controller circuit to control the voltage to be stable.
9. The method for automatically detecting under-voltage current limit of an electric vehicle controller according to claim 1, wherein the method further comprises:
collecting a first temperature value of a parallel electric element of a controller circuit, and judging whether the first temperature value is greater than a first alarm threshold value;
if yes, outputting a disconnection instruction to a shunt relay switch;
if not, outputting a voltage error feedback signal to the controller circuit to control the voltage to be stable.
10. The method for automatically detecting under-voltage current limit of an electric vehicle controller according to claim 9, wherein the method further comprises:
acquiring a second temperature value of the electric appliance element connected in series with the controller circuit, and judging whether the second temperature value is greater than a second alarm threshold value;
if yes, outputting a disconnection instruction to the power switch;
if not, outputting a voltage error feedback signal to the controller circuit to control the voltage to be stable.
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| CN202010030235.0A CN111158345A (en) | 2020-01-13 | 2020-01-13 | Automatic detection method for undervoltage current limiting of electric vehicle controller |
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| CN202010030235.0A CN111158345A (en) | 2020-01-13 | 2020-01-13 | Automatic detection method for undervoltage current limiting of electric vehicle controller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112904112A (en) * | 2021-01-18 | 2021-06-04 | 深圳市科创奇科技有限公司 | Test system and test method of scooter controller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112904112A (en) * | 2021-01-18 | 2021-06-04 | 深圳市科创奇科技有限公司 | Test system and test method of scooter controller |
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