Control System of the Electronic Lock for the DC Double-Head Charging Gun Cable of New Energy Electric Vehicles

Abstract

The present application relates to the technical field of charging guns, and discloses a control system for an electronic lock of a DC double-head charging gun cable for new energy electric vehicles. The system includes an electronic lock control module, a signal sharing module, a temperature protection module, a circuit protection module, and a control logic unit. In the present application, the electromagnetic lock coil of the electronic lock control module is used to achieve the locking function during charging; the CC1 line and the CC2 line are shared to feedback the states of the electronic lock and the gun lock, making full use of the line resources; the control and feedback of the electronic lock are realized in the case of no dedicated lines for the electronic lock and feedback; the temperature protection module monitors the temperature of the gun head in real time; the normally closed gun lock micro switch of the circuit protection module is connected in parallel with the electronic lock coil and is linked with the CC1 and CC2 lines; the control logic unit performs charging control and electronic lock unlocking operations according to different state signals, solving the problems of the existing charging gun without a gun locking function, lack of temperature protection, slow circuit protection response, and complex wiring, and improving the charging safety and system reliability.

Description

Technical Field

[0001] The present application relates to the technical field of charging guns, specifically to a control system for the electronic lock of a DC double-head charging gun cable for new energy electric vehicles. Background Art

[0002] With the popularization of new energy vehicles, the safety and reliability of DC charging guns have become key issues. Existing DC double-head charging gun cables for new energy electric vehicles are mainly used to connect testers and vehicles to detect charging performance. However, the standard interface lacks electronic lock control and feedback signals, resulting in the inability to implement the gun locking function during charging and posing a safety hazard of pulling the gun with large current.

[0003] In addition, the traditional solution does not integrate a temperature protection mechanism, and the gun head is prone to overheating risks due to long-term load or abnormal circuits. At the same time, circuit protection relies on independent signal triggering, with slow response speed and complex wiring.

[0004] In the prior art, there are technologies that attempt to control the electronic lock by multiplexing the positive terminal of the low-voltage auxiliary power supply. Specifically, see a DC charging gun, a DC double-head gun, and its charging system for new energy vehicles disclosed in Chinese Patent No. CN218958190U. However, it only controls locking depending on the power on / off state, lacks real-time status feedback, cannot handle abnormal unlocking requirements in complex scenarios, and does not involve temperature protection. There is also a control system and control method for an electronic lock of an electric vehicle charging gun disclosed in Chinese Patent No. CN110745021B. It uses an independent module to control the electronic lock, but does not optimize the structure of the charging gun, relies on additional lines to transmit signals, increases manufacturing costs and wiring complexity, and is not adapted to the special application scenarios of DC double-head guns.

[0005] Furthermore, the existing technologies generally do not effectively utilize the original line resources of the charging gun, resulting in high system redundancy and insufficient reliability.

[0006] In summary, the prior art urgently needs a new technical solution for controlling the electronic lock of a DC double-head charging gun cable for new energy electric vehicles to make up for the significant deficiencies in electronic lock control, status feedback, multi-dimensional protection, and structural optimization, and improve the integration level and reliability level. Summary of the Invention

[0007] The purpose of the present application is to provide a control system for the electronic lock of a DC double-head charging gun cable for new energy electric vehicles to solve the technical problems raised in the above background art.

[0008] To achieve the above purpose, the present application discloses the following technical solutions: A control system for the electronic lock of a DC double-head charging gun cable for new energy electric vehicles, the system includes:

[0009] The electronic lock control module includes an electromagnetic lock coil A and an electromagnetic lock coil B. The electromagnetic lock coil A is connected between the PE line and the CC1 line, and the electromagnetic lock coil B is connected to the CC1 line;

[0010] The signal sharing module includes two electronic lock lines that are shared with the CC1 line and the CC2 line respectively. They are combined into one CC2 line at the vehicle-end gun head, and the vehicle-end CC1 pin is suspended;

[0011] The temperature protection module includes a temperature switch A and a temperature switch B connected in series to the S+S- twisted shielded wire, and they are respectively arranged inside the device-end gun head and the vehicle-end gun head;

[0012] The circuit protection module includes a normally closed gun lock micro switch linked to CC2, and is arranged in parallel with the electromagnetic lock coil;

[0013] The control logic unit is configured as follows:

[0014] When not charging, the electronic lock is in the normally open state;

[0015] After charging is started, drive the electromagnetic lock coil A and the electromagnetic lock coil B to close, and feedback the locked state through the CC2 line short-circuit to the ground;

[0016] When receiving the gun lock disconnection signal or the temperature over-temperature signal, cut off the charging and unlock the electronic lock.

[0017] Preferably, the signal sharing module feeds back the locked, unlocked, and micro switch disconnection signals through the CC2 line short-circuit state to the ground.

[0018] Preferably, the temperature threshold of the temperature protection module is 100°C ± 5°C.

[0019] Preferably, the control logic unit judges the electronic lock state based on detecting the resistance value of the CC2 line to the ground. The judgment is as follows:

[0020] When the resistance value is less than the lower limit of the preset resistance value, it is judged as the locked state; when the resistance value is greater than the upper limit of the preset resistance value, it is judged as the unlocked state.

[0021] Preferably, the cross-sectional area of the PE line is greater than or equal to 16 square millimeters, and the cross-sectional areas of the CC1 line and the CC2 line are both greater than or equal to 0.75 square millimeters.

[0022] Preferably, the control logic unit is further configured as: when detecting that the CC2 line is disconnected from the PE, trigger an emergency power-off and give an audible and visual alarm.

[0023] Preferably, the system further includes a message processing module, and the message processing module is configured as:

[0024] Adjust the message sending timing based on a preset dynamic adjustment message sending timing model. The inputs of the dynamic adjustment message sending timing model include: the historical data sequence of the electronic lock status, the real-time charging progress percentage, and the environmental temperature and humidity parameters;

[0025] When the charging pile is in the maintenance state and the electronic lock is locked, suspend the sending of non-critical messages;

[0026] Automatically delay the message transmission at high load based on the bus load rate. The delay duration is calculated using the delay duration calculation formula. The delay duration calculation formula is:

[0027]

[0028] where, is the maximum value operator, is the current bus load rate, is the preset bus load rate threshold, is the preset maximum delay time.

[0029] Preferably, the dynamic adjustment message sending timing model calculates the message sending timing based on the message sending timing calculation formula , and the message sending timing calculation formula is:

[0030]

[0031] where, , and are preset weight parameters, is the historical average sending time obtained based on monitoring the electronic lock status, is the real-time charging progress percentage, is the real-time environmental temperature, is the preset environmental temperature threshold.

[0032] Preferably, the system further includes a message optimization module, and the message optimization module is configured to:

[0033] Calculate the compressed message length based on the message length calculation formula , and the message length calculation formula is:

[0034]

[0035] where, is the original message length, is the real-time statistical characteristic of the electronic lock status, is the compression rate function obtained by fitting the real-time statistical characteristic of the electronic lock status.

[0036] Preferably, the system further includes a priority management module configured to:

[0037] calculate the message priority based on the severity and urgency of the exception ; wherein, the severity of the exception is calculated based on the degree of deviation of the key parameters from the normal range when the exception occurs, and the key parameters at least include current and voltage, and the urgency is calculated based on the ratio of the remaining time from the occurrence of the exception to the occurrence of serious consequences to the preset maximum allowable time; calculate based on the priority calculation formula wherein, and are the weight coefficients of the severity and urgency respectively;

[0038] Based on the calculated message priority divide into three priority levels: high, medium, and low, and perform resource allocation and dynamic adjustment for this priority level;

[0039] The resource allocation is as follows:

[0040] When there are multiple messages waiting to be transmitted on the bus, allocate the transmission right according to the calculated priority level, with high-priority messages being transmitted first, medium-priority messages second, and low-priority messages last;

[0041] The dynamic adjustment is as follows:

[0042] Continuously monitor the status of the electronic lock. When the abnormal frequency of the electronic lock status is less than the preset abnormal frequency threshold of the status, reduce the message priority; if the abnormal frequency of the electronic lock status is greater than or equal to the status abnormal frequency threshold, increase the priority.

[0043] Advantageous effects: The control system of the DC double-headed charging gun line electronic lock of the new energy electric vehicle in this application uses the electromagnetic lock coil of the electronic lock control module to achieve the locking function during charging; shares the CC1 line and CC2 to feedback the status of the electronic lock and the gun lock, making full use of the line resources; the temperature protection module monitors the temperature of the gun head in real time; the normally closed gun lock micro switch of the circuit protection module is connected in parallel with the electronic lock coil and is linked with the CC1 and CC2 lines; the control logic unit performs charging control and electronic lock unlocking operations according to different status signals; thus realizing the electronic lock control, real-time status feedback, temperature and circuit protection functions of the charging gun, solving the problems of no gun locking function, lack of temperature protection, slow circuit protection response and complex wiring in the prior art, and improving the charging safety and system reliability. Description of the Drawings

[0044] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0045] Figure 1 It is a schematic diagram of the control system of the DC double - head charging gun line electronic lock for new energy electric vehicles provided by the embodiments of the present application. Detailed implementation manners

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0047] In this article, the term "including" is intended to cover non - exclusive inclusion, so that a process, method, article, or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or elements inherent to such a process, method, article, or device. Without further limitations, the elements defined by the statement "including..." do not exclude the existence of additional identical elements in the process, method, article, or device including the said elements.

[0048] This embodiment discloses a control system of a DC double - head charging gun line electronic lock for new energy electric vehicles as Figure 1 shown. The system includes:

[0049] The electronic lock control module includes an electromagnetic lock coil A and an electromagnetic lock coil B. The electromagnetic lock coil A is connected between the PE line and the CC1 line, and the electromagnetic lock coil B is connected to the CC1 line;

[0050] The signal sharing module includes two electronic lock lines shared with the CC1 line and the CC2 line respectively. At the vehicle - end gun head, they are combined into one CC2 line, and the vehicle - end CC1 pin is suspended;

[0051] The temperature protection module includes a temperature switch A and a temperature switch B connected in series to the S + S - twisted shielded wire, and is respectively arranged in the device - end gun head and the vehicle - end gun head;

[0052] The circuit protection module includes a normally - closed gun lock micro - switch linked with the CC2, and is arranged in parallel with the electronic lock coil;

[0053] The control logic unit is configured as:

[0054] When not charged, the electronic lock is in the normally open state;

[0055] After charging is started, drive the electromagnetic lock coil A and electromagnetic lock coil B to close, and feedback the locked state through a short circuit to the ground via the CC2 line;

[0056] When receiving the gun lock disconnection signal or the temperature overheating signal, cut off the charging and unlock the electronic lock.

[0057] Through the above, this embodiment uses the electromagnetic lock coils of the electronic lock control module to realize the locking function during charging; shares the CC1 line and CC2 to feedback the states of the electronic lock and the gun lock, making full use of the line resources; the temperature protection module monitors the temperature of the gun head in real time; the normally closed gun lock micro switch of the circuit protection module is connected in parallel with the electronic lock coil and is linked with the CC1 and CC2 lines; the control logic unit performs charging control and electronic lock unlocking operations according to different state signals; thus realizing the functions of electronic lock control, real-time state feedback, temperature and circuit protection of the charging gun, solving the problems of no gun locking function, lack of temperature protection, slow circuit protection response and complex wiring in the prior art, and improving the charging safety and system reliability.

[0058] Specifically, the signal sharing module feedbacks the locked, unlocked and micro switch disconnection signals through the short circuit state of the CC2 line to the ground, and drives the electronic lock to lock or unlock by outputting positive and negative voltages to the PE through the CC1 line.

[0059] Through the above, this embodiment uses the design of feedbacking the locked signal through the short circuit state of the CC2 line to the ground in the signal sharing module and the disconnection signal of the gun lock through the on-off state of the CC1 line, realizing the accurate feedback of the states of the electronic lock and the gun lock. Compared with the situation in the prior art of lacking real-time state feedback or relying on additional lines to transmit signals, this design not only simplifies the line structure, reduces the cost, but also enables the control logic unit to obtain the state information of the charging gun in time, so as to make charging control and electronic lock operation decisions more quickly and accurately, further improving the safety and stability of the charging process.

[0060] Specifically, the temperature threshold of the temperature protection module is 100°C ± 5°C.

[0061] Through the above, this embodiment realizes the accurate protection of the gun head temperature. When the gun head temperature reaches this threshold, the temperature protection module acts, and the control logic unit will cut off the charging and unlock the electronic lock, effectively avoiding the overheating of the gun head due to long-term load or circuit abnormality, preventing safety accidents such as fires that may be caused by overheating, solving the problem of lack of temperature protection mechanism in the prior art, ensuring the safety of the charging process, and extending the service life of the charging gun.

[0062] Specifically, the control logic unit judges the state of the electronic lock based on detecting the resistance value of the CC2 line to the ground, and this judgment is:

[0063] When the resistance value is less than the preset lower limit of the resistance value, it is determined to be in the locked state, and when the resistance value is greater than the preset upper limit of the resistance value, it is determined to be in the unlocked state.

[0064] Through the above, this embodiment realizes a reliable judgment of the state of the electronic lock. When the resistance value is less than the preset lower limit of the resistance value (exemplarily, such as 5 Ω), it is determined to be locked, and when it is greater than the preset upper limit of the resistance value (exemplarily, such as 1 kΩ), it is determined to be unlocked. This judgment method is simple and effective. Compared with the situation in the prior art where the judgment method is unclear or relies on complex devices, this design enables the system to quickly and accurately obtain the state of the electronic lock, provides a reliable basis for the decision-making of the control logic unit, ensures the correct identification of the state of the electronic lock during the charging process and the timely execution of corresponding operations, and improves the reliability of the system.

[0065] Specifically, the cross-sectional area of the PE line is greater than or equal to 16 square millimeters, and the cross-sectional areas of the CC1 line and the CC2 line are both greater than or equal to 0.75 square millimeters.

[0066] Through the above, this embodiment realizes the optimization of the line performance. The appropriate cross-sectional area ensures the current-carrying capacity and signal transmission stability of the line, reduces the line resistance, reduces the power loss and signal interference, thereby solving the problems such as line overload and unstable signal transmission that may exist in the prior art, improves the charging efficiency, ensures the accuracy of the electronic lock state feedback and control signal transmission, and enhances the reliability and stability of the entire charging gun system.

[0067] Specifically, the control logic unit is further configured to: when it detects that the CC2 line is disconnected from the PE, trigger an emergency power-off and issue an audible and visual alarm.

[0068] Through the above, this embodiment realizes a timely response to abnormal situations in the charging system. It can quickly cut off the power supply when a serious fault or accidental disconnection occurs in the charging gun, avoid safety accidents caused by abnormal current, and at the same time remind the operator through an audible and visual alarm to discover and handle problems in a timely manner. Compared with the situation in the prior art where there is a lack of such an emergency protection mechanism, it greatly improves the safety and reliability of the charging process and ensures the safety of personnel and equipment.

[0069] Specifically, the system further includes a message processing module, and the message processing module is configured to:

[0070] Based on a preset dynamic adjustment message sending timing model, adjust the message sending timing, and the inputs of the dynamic adjustment message sending timing model include: the historical data sequence of the electronic lock state, the real-time charging progress percentage, and the environmental temperature and humidity parameters;

[0071] When the charging pile is in the maintenance state and the electronic lock is locked, the sending of non-critical messages is suspended;

[0072] Automatically delay the message transmission at high load based on the bus load rate, and the delay duration is calculated using the delay duration calculation formula, and the delay duration calculation formula is:

[0073]

[0074] wherein, is the maximum value operator, is the current bus load rate, is the preset bus load rate threshold, is the preset maximum delay time.

[0075] Through the above, this embodiment realizes the intelligent management of message sending, avoids bus congestion, improves communication efficiency, reduces unnecessary message transmission, enables the system to operate efficiently and stably under different working states and environments, and enhances the overall performance and reliability of the system.

[0076] Specifically, the dynamic adjustment message sending timing model calculates the message sending timing based on the message sending timing calculation formula , and the message sending timing calculation formula is:

[0077]

[0078] wherein, , and are preset weight parameters, is the historical average sending time obtained based on monitoring the status of the electronic lock, is the real-time charging progress percentage, is the real-time ambient temperature, is the preset ambient temperature threshold.

[0079] Through the above, this embodiment realizes the accurate calculation and dynamic adjustment of the message sending timing. Compared with the traditional fixed sending timing method, it can more flexibly adapt to various changes during the charging process, such as the impact of ambient temperature on the performance of the electronic lock and the real-time change of the charging progress. It ensures that the message is sent at the most appropriate time, improves the timeliness and effectiveness of message transmission, and further optimizes the system communication efficiency and performance.

[0080] Specifically, the system further includes a message optimization module, and the message optimization module is configured to:

[0081] Calculate the compressed message length based on the message length calculation formula , and the message length calculation formula is:

[0082]

[0083] Among them, is the length of the original message, is the real-time statistical characteristic of the electronic lock status, is the compression ratio function of the real-time statistical characteristic of the electronic lock status obtained by fitting.

[0084] By the above, the present embodiment realizes the optimization of the message length. Through the effective compression of the message, the data transmission volume is reduced, the data transmission speed is increased, the bus load is reduced, and the communication efficiency is improved. While ensuring the accurate transmission of key information such as the electronic lock status, the transmission delay and error caused by the overlong message are avoided, and the reliability and stability of the system are enhanced.

[0085] Specifically, the system further includes a priority management module, and the priority management module is configured to:

[0086] Calculate the message priority based on the severity and urgency of the exception ; among them, the severity of the exception is calculated based on the degree of deviation of the key parameters from the normal range when the exception occurs. The key parameters at least include current and voltage. The urgency is calculated based on the ratio of the remaining time from the occurrence of the exception to the occurrence of serious consequences to the preset maximum allowable time; calculate based on the priority calculation formula wherein, and are the weight coefficients of the severity and urgency respectively;

[0087] Based on the calculated message priority divide into three priority levels: high, medium, and low, and perform resource allocation and dynamic adjustment for this priority level;

[0088] The resource allocation is:

[0089] When there are multiple messages waiting to be transmitted on the bus, allocate the transmission right according to the calculated priority level. The high-priority message is transmitted first, the medium-priority message follows, and the low-priority message is transmitted last;

[0090] The dynamic adjustment is:

[0091] Continuously monitor the status of the electronic lock. When the abnormal frequency of the electronic lock is less than the preset abnormal frequency threshold of the status, reduce the message priority; if the abnormal frequency of the electronic lock is greater than or equal to the abnormal frequency threshold of the status, increase the priority.

[0092] With the above, this embodiment realizes reasonable allocation of bus resources according to the urgency and severity of abnormal situations in the multi-message transmission scenario, ensuring that important and urgent messages are transmitted first. At the same time, the priority is dynamically adjusted according to the abnormal frequency of the electronic lock state, enabling the system to respond promptly to changes in the electronic lock state, improving the emergency handling ability and overall operation efficiency of the system, and ensuring the safety and stability of the charging process.

[0093] In summary, the control system of the DC double-headed charging gun line electronic lock of the new energy electric vehicle in this embodiment uses the electromagnetic lock coil of the electronic lock control module to realize the locking function during charging; shares the CC1 line and the CC2 line to feedback the electronic lock and gun lock states, making full use of the line resources; the temperature protection module monitors the gun head temperature in real time; the normally closed gun lock micro-switch of the circuit protection module is connected in parallel with the electronic lock coil and is linked with the CC1 and CC2 lines; the control logic unit performs charging control and electronic lock unlocking operations based on different state signals; thus realizing the electronic lock control, real-time state feedback, temperature and circuit protection functions of the charging gun, solving the problems of no gun locking function, lack of temperature protection, slow circuit protection response and complex wiring in the prior art, and improving the charging safety and system reliability.

[0094] In the embodiments provided in this application, it should be understood that the embodiments described here can be implemented in hardware, software, firmware, middleware, code, or any appropriate combination thereof. For hardware implementation, the processor can be implemented in one or more of the following units: application specific integrated circuit (ASIC), digital signal processor (DSP), digital signal processing device (DSPD), programmable logic device (PLD), field programmable gate array (FPGA), processor, controller, microcontroller, microprocessor, other electronic units designed to implement the functions described here, or a combination thereof. For software implementation, part or all of the processes of the embodiments can be completed by instructing the relevant hardware through a computer program. When implemented, the above program can be stored in a computer-readable storage medium or transmitted as one or more instructions or codes on a computer-readable storage medium. The computer-readable storage medium includes computer storage media and communication media, where the communication media includes any medium that facilitates the transmission of a computer program from one place to another. The storage medium can be any available medium that can be accessed by a computer. The computer-readable storage medium can include, but is not limited to, RAM, ROM, EEPROM, CD-ROM, or other optical disc storage, magnetic disk storage media, or other magnetic storage devices, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer.

[0095] Finally, it should be noted that the above are only the preferred embodiments of the present application and are not used to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A control system for an electronic lock of a DC double - headed charging gun cable of a new - energy electric vehicle, characterized in that, The system includes: The electronic lock control module includes an electromagnetic lock coil A and an electromagnetic lock coil B. The electromagnetic lock coil A is connected between the PE line and the CC1 line, and the electromagnetic lock coil B is connected to the CC1 line; The signal sharing module includes two electronic lock lines that are shared with the CC1 line and the CC2 line respectively. At the vehicle-end gun head, they are combined into one CC2 line, and the vehicle-end CC1 pin is suspended; The temperature protection module includes a temperature switch A and a temperature switch B connected in series to the S+S- twisted shielded wire, and they are respectively arranged inside the device-end gun head and the vehicle-end gun head; The circuit protection module includes a normally closed gun lock micro switch linked with the CC2, and is arranged in parallel with the electronic lock coil; The control logic unit is configured as follows: When not charging, the electronic lock is in the normally open state; After charging is started, drive the electromagnetic lock coil A and the electromagnetic lock coil B to close, and feedback the locked state through the CC2 line short-circuit to the ground; When receiving the gun lock disconnection signal or the temperature over-temperature signal, cut off the charging and unlock the electronic lock; The system further includes a message processing module, and the message processing module is configured as follows: Based on a preset dynamic adjustment message sending timing model, adjust the message sending timing. The inputs of the dynamic adjustment message sending timing model include: the historical data sequence of the electronic lock state, the real-time charging progress percentage, the environmental temperature and humidity parameters; When the charging pile is in the maintenance state and the electronic lock is locked, suspend the sending of non-critical messages; Automatically delay the message transmission at high load based on the bus load rate, and the delay duration of this delay Calculate using the delay duration calculation formula, and the delay duration calculation formula is: ； Among them, is the maximum value operator, is the current bus load rate, is the preset bus load rate threshold, is the preset maximum delay time.

2. The control system of the DC double - head charging gun line electronic lock for new - energy electric vehicles according to claim 1, characterized in that, The signal sharing module feeds back the locked, unlocked and micro switch disconnection signals through the CC2 line short-circuit state to the ground, and drives the electronic lock to lock or unlock by outputting positive and negative voltages from the CC1 line to the PE; 3. The control system of the DC double-headed charging gun line electronic lock for new energy electric vehicles according to claim 1, characterized in that The temperature threshold of the temperature protection module is 100°C ± 5°C; 4. The control system of the DC double - head charging gun line electronic lock for new - energy electric vehicles according to claim 1, characterized in that, The control logic unit judges the electronic lock state based on detecting the resistance value of the CC2 line to the ground. The judgment is as follows: When the resistance value is less than the preset lower limit of the resistance value, it is judged as the locked state. When the resistance value is greater than the preset upper limit of the resistance value, it is judged as the unlocked state; 5. The control system of the DC double-head charging gun cable electronic lock for new energy electric vehicles according to claim 1, characterized in that, The cross-sectional area of the PE line is greater than or equal to 16 square millimeters, and the cross-sectional areas of the CC1 line and the CC2 line are greater than or equal to 0.75 square millimeters; 6. The control system of the DC double - head charging gun line electronic lock for new - energy electric vehicles according to claim 1, wherein, The control logic unit is further configured as follows: when it detects that the CC2 line is disconnected from the PE, trigger an emergency power-off and issue an audible and visual alarm; 7. The control system of the DC double - headed charging gun line electronic lock for new - energy electric vehicles according to claim 1, wherein, The dynamic adjustment message sending timing model calculates the message sending timing based on the message sending timing calculation formula , and the message sending timing calculation formula is as follows: ； Among them, , and are preset weight parameters, is the historical average transmission time obtained based on the monitored status of the electronic lock, is the real-time charging progress percentage, is the real-time ambient temperature, is the preset ambient temperature threshold.

8. The control system of the DC double - head charging gun line electronic lock for new - energy electric vehicles according to claim 1, characterized in that, The system further includes a message optimization module, and the message optimization module is configured as follows: Calculate the compressed message length based on the message length calculation formula , and the message length calculation formula is as follows: ； Among them, is the original message length, is the real-time statistical characteristic of the electronic lock status, is the compression ratio function of the real-time statistical characteristic of the electronic lock status obtained by fitting.

9. The control system of the electronic lock for the DC double - headed charging gun cable of a new - energy electric vehicle according to claim 1, characterized in that, The system further includes a priority management module, and the priority management module is configured as follows: Calculate the message priority based on the severity and urgency of the exception ; wherein, the severity of the exception is calculated based on the degree of deviation of the key parameters from the normal range when the exception occurs, and the key parameters at least include current and voltage. The urgency is calculated based on the ratio of the remaining time from the occurrence of the exception to the occurrence of serious consequences to the preset maximum allowable time; calculate based on the priority calculation formula wherein, and are the weight coefficients of the severity and the urgency respectively; Based on the calculated message priority Divide into three priority levels: high, medium, and low, and perform resource allocation and dynamic adjustment for this priority level; The resource allocation is as follows: When there are multiple messages waiting to be transmitted on the bus, allocate the transmission right according to the calculated priority level. The high-priority messages are transmitted first, the medium-priority messages follow, and the low-priority messages are transmitted last; The dynamic adjustment is as follows: Continuously monitor the electronic lock state. When the abnormal frequency of the electronic lock state is less than the preset abnormal frequency threshold of the state, reduce the message priority; if the abnormal frequency of the electronic lock state is greater than or equal to the abnormal frequency threshold of the state, increase the priority.

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