Charging device

Abstract

The utility model relates to the technical field of charging equipment, and provides a charging device, which comprises a charging pile body, a charging cable and a control unit, and is characterized in that the charging pile body is provided with a prompt module; the charging cable is electrically connected with the charging pile body, a charging gun is arranged at the tail end of the charging cable, a tension sensor is arranged in the charging cable, and the tension sensor is used for detecting a tension signal of the charging cable; the control unit is electrically connected with the tension sensor and the prompt module, and the control unit is used for receiving a tension signal of the tension sensor and controlling the prompt module to send out prompt information. When the tension signal is detected to reach a danger threshold value, the linkage prompt module sends out prompt information, and the problem that a user may be injured or a charging interface may be damaged due to instant release of the charging cable caused by winding of the charging cable in the charging process can be solved. The safety of charging operation is enhanced through active early warning, the service life of the charging device is prolonged, and the operation and maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of charging equipment technology, and in particular to a charging device. Background Technology

[0002] In charging pile systems, charging cables, as the core carrier of electrical energy transmission, need to meet the requirements of high current and long distance transmission. As the charging power demand of electric vehicles increases, the charging current of charging piles also increases, resulting in thicker charging cables. The physical characteristics of thick and long cables make them prone to tangling during use.

[0003] Especially when users frequently plug and unplug cables, the cables coil into a spiral shape due to their own rigidity and gravity, and the tension of the coiled cables increases exponentially with the number of turns. When users attempt to untangle or quickly plug and unplug, the cable instantly releases its stored energy, causing the charging head to rebound at high speed, which may injure the user or damage the charging interface. Utility Model Content

[0004] This utility model provides a charging device to solve at least one of the above-mentioned technical defects in the prior art. By actively warning, it enhances the safety of charging operation, helps to extend the service life of the charging device, and reduces operation and maintenance costs.

[0005] This utility model provides a charging device, comprising:

[0006] The charging station body is equipped with a prompt module;

[0007] A charging cable is electrically connected to the charging pile body. A charging gun is provided at the end of the charging cable. A tension sensor is provided inside the charging cable to detect the tension signal of the charging cable.

[0008] The control unit is electrically connected to the tension sensor and the prompting module respectively. The control unit is used to receive the tension signal from the tension sensor and to control the prompting module to issue prompt information.

[0009] According to the charging device provided by this utility model, the charging cable includes:

[0010] A conductor, electrically connected to the charging pile body, is used to transmit high-voltage DC or AC power.

[0011] An insulating layer, wrapped around the outside of the conductor, is used to isolate the conductor;

[0012] The tension sensor is located between the conductor and the insulating layer, and is wound around the outside of the conductor by a flexible fastener.

[0013] According to the charging device provided by this utility model, the charging cable further includes:

[0014] An electromagnetic shielding layer is wrapped around the outside of the insulating layer;

[0015] An outer protective layer is placed on the outside of the electromagnetic shielding layer.

[0016] According to the charging device provided by this utility model, the tension sensors are arranged at intervals;

[0017] At least one of the tension sensors is located on the charging cable and near the charging pile body;

[0018] At least one of the tension sensors is located on the charging cable and near the charging gun;

[0019] At least one of the tension sensors is disposed on the charging cable and located between the charging pile body and the charging gun.

[0020] According to the charging device provided by this utility model, when at least one of the tension sensors is disposed on the charging cable and located between the charging pile body and the charging gun:

[0021] Each of the tension sensors is located at an easily tangled position on the charging cable.

[0022] According to the charging device provided by this utility model, the tension sensor includes:

[0023] A strain gauge assembly, comprising a tension strain gauge and a compression strain gauge, wherein the tension strain gauge and the compression strain gauge are connected in a bridge configuration;

[0024] The signal processing module, electrically connected to the strain gauge assembly, is used to calculate the tension value by detecting the voltage change output by the bridge circuit.

[0025] The signal processing module is electrically connected to the control unit via a signal line and is used to transmit the tension signal to the control unit.

[0026] According to the charging device provided by this utility model, the signal line of the signal processing module adopts a double-layer shielding structure;

[0027] The double-layer shielding structure includes a conductive shielding layer and a metal braided shielding layer, with the metal braided shielding layer wrapped around the outside of the conductive shielding layer.

[0028] According to the charging device provided by this utility model, the charging pile body is provided with a charging gun port, the charging gun is adapted to be stored in the charging gun port, the charging gun port is provided with a cover plate assembly, and the cover plate assembly is electrically connected to the control unit;

[0029] The cover plate assembly is used to automatically close when the tension signal detected by the tension sensor exceeds a preset threshold; the cover plate assembly is used to automatically open when the tension signal detected by the tension sensor meets a safety threshold.

[0030] According to the charging device provided by this utility model, the cover plate assembly includes:

[0031] The cover plate body is rotatably disposed at the gun inlet;

[0032] A drive mechanism is provided on the charging pile body and connected to the cover plate body. The drive mechanism is electrically connected to the control unit and is used to drive the cover plate body to automatically close or open in response to the command of the control unit.

[0033] According to the charging device provided by this utility model, the charging cable is also internally equipped with a coolant pipeline and a temperature sensor;

[0034] The coolant pipeline is connected to the liquid cooling pump of the charging pile body via a quick connector to form a circulating heat dissipation loop;

[0035] The temperature sensor is connected to the control unit and is used to detect the temperature of the charging cable and feed the detected temperature information back to the control unit.

[0036] The charging device provided by this utility model features a warning module on the charging pile and a tension sensor integrated into the charging cable. The control unit is electrically connected to both the warning module and the tension sensor. The tension sensor monitors the state of the charging cable in real time. When the control unit determines that the tension signal detected by the tension sensor has reached a dangerous threshold, it triggers the warning module to issue a warning message. This effectively solves the problem of the charging cable releasing its stored energy instantaneously due to tangling during charging, which could potentially injure the user or damage the charging interface. This proactive warning enhances the safety of charging operations, helps extend the lifespan of the charging device, and reduces operating and maintenance costs.

[0037] Specifically, by monitoring the tension of the charging cable in real time, the charging device can provide timely warnings of situations such as excessive pulling or tangling, thus preventing users from being injured by the suddenly ejected charging cable due to excessive force when pulling on a tangled cable. This shifts traditional reactive repair or remediation to predictive protection, improving the intelligence level of the charging device.

[0038] Furthermore, charging cables are among the most vulnerable components of charging devices. Frequent twisting, tangling, or excessive stretching can accelerate their aging and damage. The charging device provided by this invention monitors the tension signal of the charging cable, providing timely warnings of excessive pulling or tangling, reducing abnormal physical wear and tear on the cable, extending its effective lifespan, and consequently lowering the frequency of cable replacement and overall maintenance costs for charging device operators, thus improving the reliability of the charging device. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the charging device provided in an embodiment of the present invention.

[0041] Figure 2 This is a schematic diagram of the structure of the charging cable in the charging device provided in this embodiment of the utility model.

[0042] Figure 3 yes Figure 2 Enlarged view of part A in the middle.

[0043] Figure 4 This is a front view of the charging cable in the charging device provided in this embodiment of the utility model.

[0044] Figure 5 This is a cross-sectional view of the charging cable in the charging device provided in this embodiment of the utility model.

[0045] Figure 6 This is a schematic diagram of the charging device provided in this embodiment of the present invention when the charging cable is not tangled.

[0046] Figure 7 This is a schematic diagram of the charging cable being wound in the charging device provided in this embodiment of the utility model.

[0047] Figure 8 This is a partial structural schematic diagram of another embodiment of the charging device provided in this utility model.

[0048] Figure 9 yes Figure 8 A top view of another embodiment of the charging device shown.

[0049] Figure label:

[0050] 10. Charging pile body; 11. Indication module; 12. Charging gun port; 20. Charging cable; 21. Conductor; 22. Insulation layer; 30. Charging gun; 40. Control unit; 50. Tension sensor; 51. Signal line; 60. Cover plate assembly; 61. Cover plate body; 62. Drive mechanism. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0052] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0053] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0054] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0055] Figure 1 This is a schematic diagram of the charging device provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of the structure of the charging cable in the charging device provided in this embodiment of the utility model. Figure 3 yes Figure 2 Enlarged view of part A in the middle. Figure 4 This is a front view of the charging cable in the charging device provided in this embodiment of the utility model. Figure 5 This is a cross-sectional view of the charging cable in the charging device provided in this embodiment of the utility model.

[0056] See Figures 1 to 5 This utility model provides a charging device for charging electric vehicles. The charging device includes a charging pile body 10, a charging cable 20, and a control unit 40.

[0057] The charging pile body 10 serves as the physical support and integrated platform for the entire charging device. The outer shell of the charging pile body 10 is typically made of high-strength engineering plastics or corrosion-resistant metal sheets (such as galvanized steel sheets or aluminum alloys). The charging pile body 10 contains the installation locations for the control unit 40, the indicator module 11, the power conversion module, and necessary terminal blocks.

[0058] The prompt module 11 is installed at a corresponding location within the charging pile body 10 and is used to transmit prompt information. The prompt module 11 can emit at least one of optical and voice prompts; that is, it can emit either optical or voice prompts, or it can emit both simultaneously.

[0059] The optical prompts can be provided by an LED flashing light installed on the charging pile body 10. The LED flashing light is electrically connected to the control unit 40, and the control unit 40 controls the LED flashing light to perform the prompt operation.

[0060] The voice prompts can be delivered via a speaker or a buzzer alarm installed on the charging pile body 10. The speaker or buzzer alarm is electrically connected to the control unit 40. The control unit 40 controls the speaker to play the voice prompts in a loop and controls the buzzer alarm to sound an alarm.

[0061] The charging cable 20 is electrically connected to the charging pile body 10 and serves as a channel for power transmission. A charging gun 30 is located at the end of the charging cable 20, and a tension sensor 50 is installed inside the charging cable 20. The tension sensor 50 is used to detect the tension signal of the charging cable 20 after it is wound in real time.

[0062] Since the tension sensor 50 needs to be integrated into the flexible charging cable 20, it needs to be small in size, flexible, and highly responsive. Therefore, a miniature strain gauge sensor can be used to sense tension by measuring the minute deformation caused by the force applied to the charging cable 20. Alternatively, a flexible piezoelectric thin film sensor or a fiber Bragg grating-based sensor can also be used.

[0063] The control unit 40 is electrically connected to both the tension sensor 50 and the prompting module 11. The control unit 40 receives the tension signal from the tension sensor 50 and controls the prompting module 11 to issue prompt messages. The control unit 40 is the core of the entire charging device, responsible for data processing, logical judgment, and command issuance. The control unit 40 is typically a microcontroller (MCU), which has sufficient processing speed and memory to run tension analysis algorithms and voice control logic, as well as rich peripheral interfaces. For example, the hardware interfaces of the control unit 40 include sensor interfaces, prompting module interfaces, and charging control interfaces.

[0064] When the tension sensor 50 outputs an analog signal, the control unit 40 samples it using a built-in or external high-precision ADC. Typically, a front-end signal conditioning circuit is required, including a precision amplifier (such as an instrumentation amplifier) ​​to amplify the weak signal to the appropriate range of the ADC, and a low-pass filter to remove high-frequency noise. When the tension sensor 50 outputs a digital signal, the control unit 40 directly reads the data through the corresponding digital interface.

[0065] The control unit 40 typically communicates with the prompt module 11 via a UART serial interface to send playback commands or text to be synthesized. Some modules may also use SPI or I2C interfaces. Additionally, the control unit 40 needs to communicate with the main control board of the charging pile 10 (e.g., via CAN bus or UART) to obtain information such as the current charging status (e.g., charging in progress, charging complete, fault), charging current, and voltage. It may also send a request to the main control board to attempt to reduce charging power or pause charging if a serious cable safety risk is detected.

[0066] It is understood that the charging device provided in this embodiment of the present invention includes a prompt module 11 on the charging pile body 10, an integrated tension sensor 50 on the charging cable 20, and an electrical connection between the control unit 40 and the prompt module 11 and the tension sensor 50, respectively. The tension sensor 50 monitors the state of the charging cable 20 in real time. When the control unit 40 analyzes and determines that the tension signal detected by the tension sensor 50 reaches a dangerous threshold, it triggers the prompt module 11 to issue a warning message. This effectively solves the problem that during charging, the charging cable 20 may become entangled, causing it to release stored energy instantaneously, potentially injuring the user or damaging the charging interface. This proactive warning enhances the safety of charging operations, helps extend the service life of the charging device, and reduces operating and maintenance costs.

[0067] Specifically, by monitoring the tension of the charging cable 20 in real time, the charging device can provide timely warnings of situations such as excessive pulling or tangling, thus preventing users from being injured by the suddenly ejected charging cable 20 due to excessive force when pulling on a tangled cable. This shifts traditional reactive maintenance or remediation to predictive protection, improving the intelligence level of the charging device.

[0068] Furthermore, the charging cable 20 is one of the most vulnerable components in the charging device. Frequent twisting, tangling, or excessive stretching will accelerate its aging and damage. The charging device provided by this invention can promptly warn of abnormal physical wear and tear on the charging cable 20 due to excessive pulling or tangling by monitoring the tension signal of the charging cable 20 in real time, thereby extending its effective service life, reducing the frequency of cable replacement and overall maintenance costs for charging device operators, and improving the reliability of the charging device.

[0069] Continue reading Figures 2 to 5 In some embodiments of this utility model, the charging cable 20 includes a conductor 21 and an insulating layer 22.

[0070] Conductor 21 is electrically connected to the charging pile body 10 and is used to transmit high-voltage DC or AC power. Conductor 21 can be made of high-purity oxygen-free copper (OFC) or tin-plated copper wire, which has high conductivity and low resistance. Conductor 21 is made of multi-strand fine copper wire, which can improve flexibility and fatigue resistance. The cross-sectional area of ​​conductor 21 is selected according to the power.

[0071] The insulation layer 22 wraps around the outside of the conductor 21 to isolate the conductor 21 from the outside environment and prevent leakage and short circuit. The insulation layer 22 can be made of a high-temperature resistant and aging-resistant polymer (such as cross-linked polyethylene XLPE or silicone rubber).

[0072] The tension sensor 50 is located between the conductor 21 and the insulating layer 22, and is wound around the outside of the conductor 21 by a flexible fastener.

[0073] This configuration ensures that the tension sensor 50 is in close contact with the surface of the conductor 21, allowing for real-time capture of microscopic deformations of the conductor 21 caused by mechanical loads, thermal expansion, or vibration, thereby improving measurement accuracy. The flexible fastener is wrapped with an elastic material (such as silicone or polyurethane) to ensure no slippage between the tension sensor 50 and the conductor 21, avoiding measurement delays caused by friction in rigid clamps.

[0074] Furthermore, the charging cable 20 may also include an electromagnetic shielding layer and an outer protective layer. The electromagnetic shielding layer is wrapped around the outside of the insulation layer 22 to suppress electromagnetic interference (EMI), prevent the charging process from affecting the vehicle's electronic equipment, and prevent external electromagnetic interference from causing communication signal distortion. The electromagnetic shielding layer may be made of metal braided mesh (aluminum foil with tinned copper wire) or metal foil wrapped around the outside of the insulation layer 22.

[0075] An outer protective layer is placed around the outside of the electromagnetic shielding layer to protect the internal structure from mechanical damage, chemical corrosion, and environmental erosion. The outer protective layer can be made of wear-resistant, weather-resistant rubber or thermoplastic elastomer (TPE).

[0076] Figure 6 This is a schematic diagram of the charging device provided in this embodiment of the present invention when the charging cable is not tangled. Figure 7 This is a schematic diagram of the charging cable being wound in the charging device provided in this embodiment of the utility model.

[0077] See Figure 6 and Figure 7 In some embodiments of this utility model, multiple tension sensors 50 are provided at intervals; wherein, at least one tension sensor 50 is provided on the charging cable 20 and near the charging pile body 10 (as shown in position 1); at least one tension sensor 50 is provided on the charging cable 20 and near the charging gun 30 (as shown in position 5); at least one tension sensor 50 is provided on the charging cable 20 and located between the charging pile body 10 and the charging gun 30 (as shown in positions 2 to 4).

[0078] This is equivalent to setting at least one tension sensor 50 at one end near the charging gun 30. This position can directly reflect the force applied when the user operates the charging gun 30, but it may not be able to fully perceive the winding state of the entire charging cable 20.

[0079] Tension sensors 50 are distributed at multiple points in the middle section of the charging cable 20. That is, by integrating multiple tension sensors 50 evenly or at specific locations (such as easy-to-bend points) along the length of the charging cable 20, the tension distribution of each segment of the charging cable 20 can be monitored more comprehensively, thereby more accurately determining the location and degree of easy tangling.

[0080] At the point where the charging cable 20 is led out of the charging pile body 10, that is, at the cable outlet of the pile body in conjunction with the cable retractor, a tension sensor 50 is installed. The tension sensor 50 monitors the tensile force of the charging cable 20 in real time during the dragging or retraction process, so as to avoid the internal conductor 21 of the charging cable 20 from breaking or the insulation layer 22 from being damaged due to excessive pulling, thereby extending the life of the charging cable 20 and reducing maintenance costs.

[0081] When at least one tension sensor 50 is installed on the charging cable 20 and located between the charging pile body 10 and the charging gun 30, that is, when tension sensors 50 are distributed at multiple points in the middle section of the charging cable 20, each tension sensor 50 is located at an easily tangled position of the charging cable 20.

[0082] By using tension sensors 50 distributed at multiple points along the middle section, local tension changes can be detected as soon as winding begins to form, without waiting until the winding becomes severe enough to affect the tension of the entire cable before issuing an alarm. Furthermore, by comparing tension data at different points, differential analysis can be performed to rule out normal usage conditions such as overall stretching, focusing on identifying local tension anomalies and improving the accuracy of identification.

[0083] Among these, the most prone-to-tangling locations can be identified by collecting and statistically analyzing actual usage data from a large number of charging scenarios, revealing the high-incidence areas for tangling of the charging cable 20. For example, the two areas most likely to tangle are approximately 1 meter from the cable outlet of the charging pile 10 and approximately 0.5-1 meter from the charging gun 30.

[0084] Alternatively, the location prone to tangling can be analyzed based on the flexible mechanical properties of the charging cable 20. In a long charging cable 20, the transition area with uneven stiffness distribution (such as the transition area between the reinforced section and the ordinary section at the connection between the charging cable 20 and the charging gun 30) is often a stress concentration area and the location most prone to deformation and tangling.

[0085] In some embodiments of this invention, the tension sensor 50 can be a resistance strain gauge tension sensor 50. The resistance strain gauge tension sensor includes a strain gauge assembly and a signal processing module. The strain gauge assembly includes a tension strain gauge and a compression strain gauge, which are connected in a bridge configuration. When the charging cable 20 is wound and subjected to force, the resistance value of the tension strain gauge changes proportionally to the tension. The signal processing module is electrically connected to the strain gauge assembly and is used to calculate the tension value by detecting the voltage change output by the bridge.

[0086] The signal processing module is electrically connected to the control unit 40 via signal line 51, and is used to transmit the tension signal to the control unit 40. The signal line 51 is embedded in the inner layer of the insulating layer 22, and uses a shielding structure (such as a copper mesh braided layer) to reduce external electric / magnetic field interference.

[0087] Specifically, since the signal line 51 of the tension sensor 50 usually carries a small electrical signal and is easily affected by electromagnetic interference, the signal line 51 of the signal processing module adopts a double-layer shielding structure. The double-layer shielding structure includes a conductive shielding layer and a metal braided shielding layer, with the metal braided shielding layer wrapped around the outside of the conductive shielding layer.

[0088] In some embodiments of this utility model, the prompting module 11 includes a voice chip, an audio power amplifier, and a speaker. The voice chip can be a pre-recorded voice playback chip, which stores preset prompt sounds in the chip. Alternatively, a text-to-speech (TTS) chip can be used, which can dynamically synthesize the text sent by the control unit 40 into natural speech. The audio power amplifier is used to amplify the audio signal output by the voice chip. The speaker is selected with a wide frequency response range and good waterproof and dustproof performance to ensure clear and loud sound in outdoor environments. The speaker should be installed on the panel of the charging pile body 10 in a position that facilitates sound propagation. A sound amplification hole is provided on the outer shell of the charging pile body 10 for transmitting the prompting information from the prompting module 11. The design of the sound amplification hole needs to take waterproofing into account.

[0089] Figure 8 This is a partial structural schematic diagram of another embodiment of the charging device provided in this utility model. Figure 9 yes Figure 8 A top view of another embodiment of the charging device shown.

[0090] See Figure 8 and Figure 9 In some embodiments of this utility model, the charging pile body 10 is provided with a charging gun port 12, which is located on the front of the charging pile body 10 and adopts a waterproof and dustproof design, with a standardized charging interface integrated inside. The charging gun 30 is suitable for being stored in the charging gun port 12, and the charging gun port 12 is provided with a cover plate assembly 60, which is electrically connected to the control unit 40.

[0091] The cover assembly 60 is used to automatically close when the tension signal detected by the tension sensor 50 exceeds a preset threshold. That is, when the control unit 40 analyzes and judges that the tension signal detected by the tension sensor 50 reaches a certain value, it will link the prompt module 11 on the charging pile body 10 to inform the user that the cable is seriously tangled and the gun cannot be inserted. The user needs to straighten the cable before inserting the gun, and at the same time close the gun insertion port 12 of the charging pile body 10.

[0092] The cover assembly 60 is designed to open automatically when the tension signal detected by the tension sensor 50 meets a safety threshold. In other words, the cover assembly 60 only opens under safe tension conditions, preventing accidental ejection of the gun head due to user error (such as a child pulling on it) and reducing the risk of electric shock.

[0093] During use, the tension danger value is first set in the system in advance. The tension sensor 50 monitors the tangling of the charging cable 20 in real time. When the tangling of the charging cable 20 reaches the tension danger value (preset threshold), the control unit 40 controls the speaker to make a voice reminder. At the same time, the cover plate body 61 on the charging pile body 10 is closed to seal the gun port 12, so as to inform the user that the gun cannot be inserted at present and the charging cable 20 needs to be straightened before the gun can be inserted.

[0094] After the charging cable 20 is straightened, the tension sensor 50 detects that the tension of the charging cable 20 meets the safety threshold, and the control unit 40 controls the speaker to make a voice reminder again, and at the same time opens the main body 61 of the charging pile body 10 to expose the charging gun port 12.

[0095] When a user accidentally causes the charging cable 20 to wrap around three times, the tension sensor 50 detects that the tension has risen to near the danger threshold, and the control unit 40 activates a warning: the prompt module 11 of the charging pile body 10 plays voice prompts, alarm prompts, optical prompts, etc., while the cover assembly 60 remains closed.

[0096] It is understood that, in the charging device provided by this embodiment of the present invention, when the control unit 40 analyzes and determines that the tension signal detected by the tension sensor 50 reaches a dangerous threshold, the linkage warning module 11 issues a warning message and simultaneously closes the cover assembly 60. This effectively solves the problem that during the charging process, the charging cable 20 may become entangled, causing it to instantly release its stored elastic potential energy, which could potentially injure the user or damage the charging interface. Enhancing the safety of charging operations through proactive warnings helps extend the service life of the charging device and reduce operating and maintenance costs.

[0097] Specifically, the cover assembly 60 includes a cover body 61 and a drive mechanism 62. The cover body 61 may be made of a lightweight alloy. The cover body 61 is rotatably mounted at the charging port 12 of the charging pile via a rotating shaft, with both ends of the rotating shaft supported by bearings. The drive mechanism 62 is located on the charging pile body 10 and connected to the cover body 61. The drive mechanism 62 is also electrically connected to the control unit 40 and is used to drive the cover body 61 to automatically close or open in response to commands from the control unit 40.

[0098] The drive mechanism 62 includes a motor fixed inside the charging pile body 10. The motor can be directly connected to the rotating shaft or connected to the rotating shaft through a coupling or other components. When the motor starts, the output shaft of the motor drives the rotating shaft of the cover body 61 to rotate and open / close. Alternatively, the drive mechanism 62 may also include a motor and transmission components connected to the cover body 61. For example, the drive mechanism 62 may include a motor, a gear, and a rack. The gear is fixedly connected to the motor output shaft, and the rack is fixed to one side of the cover body 61 and meshes with the gear. When the motor starts, the gear meshes with the rack, driving the cover body 61 to move linearly along the direction of the gun nozzle 12 to achieve opening and closing.

[0099] In some embodiments of this utility model, the charging cable 20 is also equipped with a coolant pipeline and a temperature sensor; the coolant pipeline is connected to the liquid cooling pump of the charging pile body 10 through a quick connector to form a circulating heat dissipation circuit; the temperature sensor is connected to the control unit 40 to detect the temperature of the charging cable 20 and to feed back the detected temperature information to the control unit 40.

[0100] This configuration, through the coordinated action of the coolant piping and temperature sensor, allows the temperature rise of the charging cable 20 to be controlled within a suitable range, thereby increasing the charging power density. Simultaneously, by adjusting the coolant flow rate in real time, it prevents localized overheating of the cable, avoiding aging of the insulation layer 22 or melting of the conductor 21, thus extending its service life.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A charging device, characterized in that, include: The charging station body is equipped with a prompt module; A charging cable is electrically connected to the charging pile body. A charging gun is provided at the end of the charging cable. A tension sensor is provided inside the charging cable to detect the tension signal of the charging cable. The control unit is electrically connected to the tension sensor and the prompting module respectively. The control unit is used to receive the tension signal from the tension sensor and to control the prompting module to issue prompt information.

2. The charging device according to claim 1, characterized in that, The charging cable includes: A conductor, electrically connected to the charging pile body, is used to transmit DC or AC power; An insulating layer, wrapped around the outside of the conductor, is used to isolate the conductor; The tension sensor is located between the conductor and the insulating layer, and is wound around the outside of the conductor by a flexible fastener.

3. The charging device according to claim 2, characterized in that, The charging cable also includes: An electromagnetic shielding layer is wrapped around the outside of the insulating layer; An outer protective layer is placed on the outside of the electromagnetic shielding layer.

4. The charging device according to claim 1, characterized in that, The tension sensors are spaced in multiples; At least one of the tension sensors is located on the charging cable and near the charging pile body; At least one of the tension sensors is located on the charging cable and near the charging gun; At least one of the tension sensors is disposed on the charging cable and located between the charging pile body and the charging gun.

5. The charging device according to claim 4, characterized in that, With at least one of the tension sensors located on the charging cable and between the charging pile and the charging gun: each tension sensor is located at an easily tangled position on the charging cable.

6. The charging device according to claim 1, characterized in that, The tension sensor includes: A strain gauge assembly, comprising a tension strain gauge and a compression strain gauge, wherein the tension strain gauge and the compression strain gauge are connected in a bridge configuration; The signal processing module, electrically connected to the strain gauge assembly, is used to calculate the tension value by detecting the voltage change output by the bridge circuit. The signal processing module is electrically connected to the control unit via a signal line and is used to transmit the tension signal to the control unit.

7. The charging device according to claim 6, characterized in that, The signal lines of the signal processing module adopt a double-layer shielding structure; The double-layer shielding structure includes a conductive shielding layer and a metal braided shielding layer, with the metal braided shielding layer wrapped around the outside of the conductive shielding layer.

8. The charging device according to any one of claims 1 to 7, characterized in that, The charging pile body is provided with a charging gun port, the charging gun is adapted to be stored in the charging gun port, the charging gun port is provided with a cover plate assembly, and the cover plate assembly is electrically connected to the control unit; The cover plate assembly is used to automatically close when the tension signal detected by the tension sensor exceeds a preset threshold; the cover plate assembly is used to automatically open when the tension signal detected by the tension sensor meets a safety threshold.

9. The charging device according to claim 8, characterized in that, The cover plate assembly includes: The cover plate body is rotatably disposed at the gun inlet; A drive mechanism is provided on the charging pile body and connected to the cover plate body. The drive mechanism is electrically connected to the control unit and is used to drive the cover plate body to automatically close or open in response to the command of the control unit.

10. The charging device according to any one of claims 1 to 7, characterized in that, The charging cable also has a coolant pipeline and a temperature sensor embedded inside; The coolant pipeline is connected to the liquid cooling pump of the charging pile body via a quick connector to form a circulating heat dissipation loop; The temperature sensor is connected to the control unit and is used to detect the temperature of the charging cable and feed the detected temperature information back to the control unit.

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