Direct current charging device, control method and vehicle

Abstract

The invention relates to a direct current charging device, a control method and a vehicle, and relates to the field of vehicles. The device comprises a device body, and the device body is provided with a charging port. The charging port cover plate is used for covering or exposing the charging port; the detection device is arranged on the charging port cover plate and used for detecting the opening and closing state of the charging port cover plate; the first end of the contactor is connected with the battery pack, the second end of the contactor is connected with the charging port, and the control module is connected with the control end of the contactor; the contactor is used for connecting or disconnecting a loop between the charging port and the battery pack; and the control module is used for controlling the contactor to connect or disconnect a loop between the charging port and the battery pack according to the opening and closing state of the charging port cover plate. The device is simple in structure, can reduce the cost of the vehicle, enables the vehicle not to be charged even if the charging port is opened when the vehicle is not charged, and can avoid the safety problem caused by the sintering of the contactor.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicles, and more particularly, to a DC charging device, a control method, and a vehicle. Background Art

[0002] In the related art, the DC charging device of an electric vehicle mainly consists of a battery pack, positive and negative contactors of the battery pack, and positive and negative contactors of DC charging. When the vehicle is charging, the positive and negative contactors of the battery pack and the positive and negative contactors of DC charging are controlled to close to achieve the charging function. During discharging, the positive and negative contactors of the battery pack are closed, and at the same time, the positive and negative contactors of DC charging are disconnected. Among them, the contactor may have a sintering failure. If the positive and negative contactors of DC charging fail to disconnect due to sintering failure, the charging port of the vehicle may be energized.

[0003] The positive and negative contactors of DC charging in the related art are not specifically designed for charging operations, but are to remain in the open state during the discharging process (i.e., when the positive and negative contactors of the vehicle battery pack are engaged). Such a design increases the cost, and there is a risk of sintering failure of the contactor. Once the positive and negative contactors of DC charging have a sintering failure and it fails to be detected in time, it may lead to the charging port being energized, posing a potential safety hazard. Summary of the Invention

[0004] To overcome the problems existing in the related art, the present disclosure provides a DC charging device, a control method, and a vehicle.

[0005] According to a first aspect of an embodiment of the present disclosure, there is provided a DC charging device, including:

[0006] A device body, on which a charging port is provided;

[0007] A charging port cover plate for covering or exposing the charging port;

[0008] A detection device provided on the charging port cover plate for detecting the opening and closing state of the charging port cover plate;

[0009] A battery pack, a contactor, and a control module, where a first end of the contactor is connected to the battery pack, a second end of the contactor is connected to the charging port, and the control module is connected to a control end of the contactor;

[0010] The contactor is configured to conduct or cut off a circuit between the charging port and the battery pack;

[0011] The control module is configured to control the contactor to conduct or cut off the circuit between the charging port and the battery pack according to the opening and closing state of the charging port cover plate.

[0012] Optionally, the detection device includes:

[0013] A voltage adjustment module, which is used to connect to the pin of the control and guidance circuit on the charging port when the charging port cover is in the closed state, so as to adjust the voltage of the control and guidance circuit to a first voltage value, and disconnect from the pin of the control and guidance circuit on the charging port when the charging port cover is in the open state, so as to adjust the voltage of the control and guidance circuit to a second voltage value;

[0014] The control module is used to determine the opening and closing state of the charging port cover according to the voltage of the control and guidance circuit.

[0015] Optionally, the voltage adjustment module includes:

[0016] A first terminal, a second terminal and a resistor, the first end of the first terminal is connected to the first end of the resistor, and the first end of the second terminal is connected to the second end of the resistor;

[0017] The second end of the first terminal is used to connect to the first pin of the control and guidance circuit when the charging port cover is in the closed state, and disconnect from the first pin of the control and guidance circuit when the charging port cover is in the open state;

[0018] The second end of the second terminal is used to connect to the second pin of the control and guidance circuit when the charging port cover is in the closed state, and disconnect from the second pin of the control and guidance circuit when the charging port cover is in the open state.

[0019] Optionally, the control module is used for:

[0020] When the opening and closing state of the charging port cover indicates that the charging port cover is in the open state, if the charging port is not connected to a charging device, control the contactor to cut off the circuit between the charging port and the battery pack.

[0021] According to a second aspect of the embodiments of the present disclosure, a DC charging control method is provided, which is executed by the control module in the DC charging device described in the first aspect. The method includes:

[0022] Determine the opening and closing state of the charging port cover;

[0023] According to the opening and closing state of the charging port cover, control the contactor to conduct or cut off the circuit between the charging port and the battery pack.

[0024] Optionally, the detection device includes:

[0025] A voltage adjustment module, which is used to connect to the pins of the control and guidance circuit on the charging port when the charging port cover is in the closed state, so as to adjust the voltage of the control and guidance circuit to a first voltage value, and disconnect from the pins of the control and guidance circuit on the charging port when the charging port cover is in the open state, so as to adjust the voltage of the control and guidance circuit to a second voltage value. The voltage adjustment module is used to connect to the pins on the charging port when the charging port cover is in the closed state, so as to adjust the voltage of the control and guidance circuit to a first voltage value, and disconnect from the pins on the charging port when the charging port cover is in the open state, so as to adjust the voltage of the control and guidance circuit to a second voltage value;

[0026] Determining the opening and closing state of the charging port cover includes:

[0027] Determining the opening and closing state of the charging port cover according to the voltage of the control and guidance circuit.

[0028] Optionally, controlling the contactor to conduct or cut off the circuit between the charging port and the battery pack according to the opening and closing state of the charging port cover includes:

[0029] When the opening and closing state of the charging port cover indicates that the charging port cover is in the open state, if the charging port is not connected to a charging device, control the contactor to cut off the circuit between the charging port and the battery pack.

[0030] Optionally, the method further includes:

[0031] When the opening and closing state of the charging port cover indicates that the charging port cover is in the closed state, determine whether to control the contactor to conduct the circuit between the charging port and the battery pack according to the running state of the vehicle.

[0032] Optionally, the method further includes:

[0033] When the opening and closing state of the charging port cover indicates that the charging port cover is in the open state, if the charging port is connected to a charging device, control the contactor to conduct the circuit between the charging port and the battery pack.

[0034] According to the third aspect of the embodiments of the present disclosure, a vehicle is provided, including:

[0035] A DC charging device as described in any one of the first aspects of the embodiments of the present disclosure.

[0036] Based on the above solution, the DC charging device can detect the opening and closing state of the charging port cover by adding a detection device on the charging port cover. According to the opening and closing state of the charging port cover, the control module can control whether the contactor corresponding to the battery pack conducts or cuts off the circuit between the charging port and the battery pack. When charging, the circuit between the battery pack and the charging port is conducted for charging. After charging is completed, the detection device can detect whether the charging port cover is opened, and then the control module controls the contactor to cut off the circuit between the charging port and the battery pack. Thus, when the vehicle is not charging, even if the charging port is opened, the charging port is not charged, which can avoid safety problems caused by contactor sintering. Moreover, the DC charging device reuses the contactor corresponding to the battery pack, and there is no need to additionally set other contactors for cutting off the circuit between the charging port and the battery pack during DC charging between the circuit of the battery pack and the charging port, thereby further reducing the production cost of the vehicle and simplifying the structure of the DC charging device, and effectively avoiding the occurrence of failures.

[0037] Other features and advantages of the present disclosure will be described in detail in the following detailed implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification. Together with the following detailed implementation, they are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings:

[0039] Figure 1 is a schematic structural diagram of a DC charging device shown according to an exemplary embodiment of the present disclosure.

[0040] Figure 2 is a flowchart of a DC charging control method shown according to an exemplary embodiment of the present disclosure.

[0041] Figure 3 is a schematic diagram of a control and guidance circuit principle for DC charging shown according to an exemplary embodiment of the present disclosure.

[0042] Figure 4 is a schematic diagram showing the voltage change of the control and guidance circuit shown according to an exemplary embodiment of the present disclosure.

[0043] DESCRIPTION OF REFERENCE NUMERALS

[0044] DC charging device 100, device body 110, charging port 111, pin 112, first pin 113, second pin 114, charging port cover 120, detection device 121, voltage adjustment module 122, first terminal 123, second terminal 124, resistor 125, battery pack 130, contactor 140, positive contactor 141, negative contactor 142, control module 150. DETAILED IMPLEMENTATION

[0045] The following will describe in detail the specific embodiments of the present disclosure with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for explaining and interpreting the present disclosure, and are not used to limit the present disclosure.

[0046] It should be noted that all actions of obtaining signals, information or data in the present disclosure are carried out on the premise of complying with the corresponding data protection regulations and policies of the country where the location is located and obtaining authorization from the corresponding system owner.

[0047] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the following will further describe the present disclosure in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and are not used to limit the present disclosure. In addition, the technical features involved in the various embodiments of the present disclosure described below can be combined with each other as long as they do not conflict with each other.

[0048] Figure 1 is a schematic structural diagram of a DC charging device shown according to an exemplary embodiment of the present disclosure. This device can be applied to new energy vehicles, such as Figure 1 As shown, a DC charging device 100 provided by an embodiment of the present disclosure includes:

[0049] A device body 110, on which a charging port 111 is provided;

[0050] A charging port cover 120, which is used to cover or expose the charging port 111;

[0051] A detection device 121, which is provided on the charging port cover 120 and is used to detect the opening and closing state of the charging port cover 120;

[0052] A battery pack 130, a contactor 140 and a control module 150. The first end of the contactor 140 is connected to the battery pack 130, the second end of the contactor 140 is connected to the charging port 111, and the control module 150 is connected to the control end of the contactor 140;

[0053] The contactor 140 is used to conduct or cut off the circuit between the charging port 111 and the battery pack 130;

[0054] The control module 150 is used to control the contactor 140 to conduct or cut off the circuit between the charging port 111 and the battery pack 130 according to the opening and closing state of the charging port cover 120.

[0055] Here, the device body 110 refers to the main part of the DC charging device 100, on which a charging port 111 is provided for connecting a charging device to charge the vehicle.

[0056] The charging port cover plate 120 can be a plastic cover with a sealing structure for covering or exposing the charging port 111. The charging port cover plate 120 can be connected to the device body 110 or the charging port 111. When the vehicle is not charging, the charging port cover plate 120 is in a closed state to cover the charging port 111, and when the vehicle is charging, the charging port cover plate 120 is in an open state to expose the charging port 111 so that a charging device can be inserted into the charging port 111 to charge the vehicle. Before and after the vehicle charges, the charging port cover plate 120 may be in an open state. The DC charging device 100 provided by the embodiments of the present disclosure can make the charging port 111 not charged at this time, improving the safety of charging.

[0057] When the detection device 121 detects that the charging port cover plate 120 is open, it can send a signal indicating the opening and closing state of the charging port cover plate 120 to the control module 150. The detection device 121 can be devices such as a photoelectric switch, a reed switch, a proximity switch, an infrared sensor, etc.

[0058] The battery pack 130 is a component for storing electric energy. When the vehicle charges, the battery pack 130 can store the electric energy obtained from the charging device, and when the load of the vehicle operates, the battery pack 130 can provide the stored electric energy to the load. The load can be a drive motor and other auxiliary devices.

[0059] The contactor 140 is a switch for conducting or cutting off the circuit between the charging port 111 and the battery pack 130. The contactor 140 includes a positive contactor 141 and a negative contactor 142. The positive contactor 141 and the negative contactor 142 refer to the positive and negative contactors corresponding to the battery pack 130 for controlling the on-off of the high-voltage circuit of the battery pack 130.

[0060] The control module 150 can perform flexible and fast control, withstand high current to ensure the safety of the device, and can be a controller such as a microcontroller, a PLC controller, a single-chip microcomputer, an embedded system, etc. Of course, the control module 150 can also be a vehicle controller.

[0061] In an embodiment of the present disclosure, the provided DC charging device 100 can detect the opening and closing state of the charging port cover 120 by adding a detection device 121 to the charging port cover 120. According to the opening and closing state of the charging port cover 120, the control module 150 can control whether the contactor 140 corresponding to the battery pack 130 conducts or cuts off the circuit between the charging port 111 and the battery pack 130. When charging, the circuit between the battery pack 130 and the charging port 111 is conducted for charging. After charging is completed, the detection device 121 can detect whether the charging port cover 120 is opened, and then the control module 150 controls the contactor 140 to cut off the circuit between the charging port 111 and the battery pack 130. Thus, when the vehicle is not charging, even if the charging port 111 is opened, the charging port 111 is not powered, which can avoid safety problems caused by sintering of the contactor 140. Moreover, the DC charging device multiplexes the contactor 140 corresponding to the battery pack 130, and there is no need to additionally set other contactors for cutting off the circuit between the charging port 111 and the battery pack 130 in the circuit between the battery pack 130 and the charging port 111 during DC charging, thereby further reducing the production cost of the vehicle and simplifying the structure of the DC charging device 100, and effectively avoiding the occurrence of faults.

[0062] Referring to Figure 1 , in some possible embodiments, the detection device 121 may include:

[0063] A voltage adjustment module 122, which is used to connect to the pin 112 of the control pilot circuit on the charging port 111 when the charging port cover 120 is in the closed state to adjust the voltage of the control pilot circuit to a first voltage value, and disconnect from the pin 112 of the control pilot circuit on the charging port 111 when the charging port cover 120 is in the open state to adjust the voltage of the control pilot circuit to a second voltage value;

[0064] The control module 150 is used to determine the opening and closing state of the charging port cover 120 according to the voltage of the control pilot circuit.

[0065] Here, the voltage adjustment module 122 may include components such as a relay, a capacitor, and a resistor 125.

[0066] The charging port cover 120 being in the closed state means that the charging port cover 120 covers the charging port 111, and the charging port cover 120 being in the open state means that the charging port cover 120 exposes the charging port 111.

[0067] The connection of the voltage adjustment module 122 to the pin 112 on the charging port 111 can enable the voltage adjustment module 122 to be connected to the control pilot circuit and adjust the voltage of the control pilot circuit to the first voltage value.

[0068] The voltage adjustment module 122 is disconnected from the pin 112 on the charging port 111, enabling the voltage adjustment module 122 to be separated from the control pilot circuit and allowing the voltage of the control pilot circuit to be adjusted to a second voltage value.

[0069] The control module 150 can receive a signal sent by the detection device 121 representing the voltage of the control pilot circuit. When receiving a signal indicating that the voltage of the control pilot circuit is a first voltage value, it determines that the charging port cover 120 is in the closed state. When receiving a signal indicating that the voltage of the control pilot circuit is a second voltage value, it determines that the charging port cover 120 is in the open state, and the first voltage value is different from the second voltage value.

[0070] The first voltage value and the second voltage value can be determined based on the voltage of the battery pack 130, the voltage of the charging port 111, the voltage of the load connected to the battery pack 130, and circuit safety requirements. The specific values are related to factors such as the type of the battery pack 130, the specifications of the charging system, and vehicle safety requirements.

[0071] Refer to Figure 1 In some possible embodiments, the voltage adjustment module 122 may include:

[0072] A first terminal 123, a second terminal 124, and a resistor 125. The first end of the first terminal 123 is connected to the first end of the resistor 125, and the first end of the second terminal 124 is connected to the second end of the resistor 125;

[0073] The second end of the first terminal 123 is configured to be connected to the first pin 113 of the control pilot circuit on the charging port 111 when the charging port cover 120 is in the closed state, and to be disconnected from the first pin 113 of the control pilot circuit when the charging port cover 120 is in the open state;

[0074] The second end of the second terminal 124 is configured to be connected to the second pin 114 of the control pilot circuit when the charging port cover 120 is in the closed state, and to be disconnected from the second pin 114 of the control pilot circuit when the charging port cover 120 is in the open state.

[0075] Here, when the charging port cover 120 is in the closed state, the second end of the first terminal 123 is connected to the first pin 113 on the charging port 111, and the second end of the second terminal 124 is connected to the second pin 114 on the charging port 111, enabling the resistor 125 to be connected into the control pilot circuit and allowing the voltage of the control pilot circuit to be adjusted to a first voltage value.

[0076] When the charging port cover 120 is in the open state, the second end of the first terminal 123 is disconnected from the first pin 113 on the charging port 111, and the second end of the second terminal 124 is disconnected from the second pin 114 on the charging port 111, which can separate the resistor 125 from the control and guidance circuit and adjust the voltage of the control and guidance circuit to the second voltage value.

[0077] The control module 150 can receive the signal sent by the detection device 121 representing the voltage of the control and guidance circuit. When receiving the signal representing that the voltage of the control and guidance circuit is the first voltage value, it determines that the charging port cover 120 is in the closed state. When receiving the signal representing that the voltage of the control and guidance circuit is the second voltage value, it determines that the charging port cover 120 is in the open state, and the first voltage value is different from the second voltage value.

[0078] In some possible embodiments, the control module 150 is configured to:

[0079] When the opening and closing state of the charging port cover 120 represents that the charging port cover 120 is in the open state, if the charging port 111 is not connected to a charging device, the control contactor 140 cuts off the circuit between the charging port 111 and the battery pack 130.

[0080] Here, when the opening and closing state of the charging port cover 120 represents that the charging port cover 120 is in the open state, if the charging port 111 is not connected to a charging device, the control contactor 140 cuts off the circuit between the charging port 111 and the battery pack 130, which can make the charging port 111 de-energized and avoid safety problems caused by the sintering of the contactor 140.

[0081] Accordingly, by adding the detection device 121 to the charging port cover 120, the above-mentioned DC charging device 100 can detect the opening and closing state of the charging port cover 120. According to the opening and closing state of the charging port cover 120, the control module 150 can control whether the contactor 140 corresponding to the battery pack 130 conducts or cuts off the circuit between the charging port 111 and the battery pack 130. When charging, the circuit between the battery pack 130 and the charging port 111 is conducted for charging. After charging is completed, the detection device 121 can be used to detect whether the charging port cover 120 is opened, and then the control module 150 controls the contactor 140 to cut off the circuit between the charging port 111 and the battery pack 130. Thus, when the vehicle is not charging, even if the charging port 111 is opened, the charging port 111 is not charged, which can avoid safety problems caused by sintering of the contactor 140. Moreover, this DC charging device reuses the contactor 140 corresponding to the battery pack 130, and there is no need to additionally set other contactors for cutting off the circuit between the charging port 111 and the battery pack 130 in the circuit between the battery pack 130 and the charging port 111 during DC charging, thereby further reducing the production cost of the vehicle and simplifying the structure of the DC charging device 100, and effectively avoiding the occurrence of failures.

[0082] Figure 2 is a flowchart of a DC charging control method shown according to an exemplary embodiment of the present disclosure. As Figure 2 shown, the embodiments of the present disclosure provide a DC charging control method, which is executed by the control module in the above-mentioned DC charging device. The method includes the following steps.

[0083] In step 210, determine the opening and closing state of the charging port cover.

[0084] In step 220, according to the opening and closing state of the charging port cover, control the contactor to conduct or cut off the circuit between the charging port and the battery pack.

[0085] It should be understood that the control module can receive the signal representing the opening and closing state of the charging port cover sent by the detection device on the charging port cover, so as to determine the opening and closing state of the charging port cover according to the signal. According to the opening and closing state of the charging port cover, the control module controls the contactor to conduct or cut off the circuit between the charging port and the battery pack through the control end of the contactor. When the contactor conducts the circuit between the charging port and the battery pack, the charging port is charged; when the contactor cuts off the circuit between the charging port and the battery pack, the charging port is not charged.

[0086] In some possible embodiments, the detection device may include:

[0087] A voltage adjustment module, which is used to connect to the pins of the control and guidance circuit on the charging port when the charging port cover is in the closed state, so as to adjust the voltage of the control and guidance circuit to a first voltage value, and disconnect from the pins of the control and guidance circuit on the charging port when the charging port cover is in the open state, so as to adjust the voltage of the control and guidance circuit to a second voltage value;

[0088] Determining the opening and closing state of the charging port cover may include:

[0089] Determining the opening and closing state of the charging port cover according to the voltage of the control and guidance circuit.

[0090] It should be understood that the detection device uses the voltage adjustment module to adjust the voltage of the control and guidance circuit, and the control module determines the opening and closing state of the charging port cover according to the voltage of the control and guidance circuit.

[0091] In some possible embodiments, according to the opening and closing state of the charging port cover, controlling the contactor to conduct or cut off the circuit between the charging port and the battery pack may include:

[0092] When the opening and closing state of the charging port cover indicates that the charging port cover is in the open state, if the charging port is not connected to the charging device, control the contactor to cut off the circuit between the charging port and the battery pack.

[0093] In some possible embodiments, the method may further include:

[0094] When the opening and closing state of the charging port cover indicates that the charging port cover is in the closed state, determine whether to control the contactor to conduct the circuit between the charging port and the battery pack according to the operating state of the vehicle.

[0095] Wherein, the operating state of the vehicle may refer to whether there is a load that needs to be powered. When the operating state of the vehicle indicates that there is a load that needs to be powered by the battery pack, control the contactor to conduct the circuit between the charging port and the battery pack. When the operating state of the vehicle indicates that there is no load that needs to be powered by the battery pack, control the contactor to cut off the circuit between the charging port and the battery pack.

[0096] That is to say, when the opening and closing state of the charging port cover indicates that the charging port cover is in the closed state, it can be determined whether to conduct the circuit between the charging port and the battery pack according to whether there is a load that needs to be powered by the battery pack.

[0097] In some possible embodiments, the method may further include:

[0098] When the opening and closing state of the charging port cover indicates that the charging port cover is in the open state, if the charging port is connected to the charging device, control the contactor to conduct the circuit between the charging port and the battery pack.

[0099] Figure 3 It is a schematic diagram of the control and guidance circuit for DC charging shown according to an exemplary embodiment of the present disclosure. Refer to Figure 3 , which is a schematic diagram of the control and guidance circuit for DC charging in the electric vehicle conductive charging system with reference to GBT18487.1-2015. The control and guidance circuit includes resistor R2, resistor R3, resistor R4, resistor R5, switch S, contactor 140, and control module 150. The voltage of the control and guidance circuit is the voltage corresponding to detection point 2.

[0100] When the voltage adjustment module is disconnected from the pin on the charging port, the current of the control and guidance circuit flows through resistor R5, and the voltage at detection point 2 is the voltage of resistor R5. When the voltage adjustment module is connected to the pin on the charging port, the first pin 113 on the charging port and the second pin 114 on the charging port are connected and conducted through the voltage adjustment module. Then the current of the control and guidance circuit flows from the voltage adjustment module, through resistor R5, and then to control module 150, and the voltage of the control and guidance circuit changes.

[0101] Among them, control module 150 can be a vehicle controller. The vehicle controller can judge the opening and closing state of the charging port cover according to the voltage at detection point 2 (the voltage of the control and guidance circuit). Figure 4 It is a schematic diagram showing the voltage change of the control and guidance circuit shown according to an exemplary embodiment of the present disclosure. Refer to Figure 4 , during the vehicle use, there may be the following situations.

[0102] 1. When the opening and closing state of the charging port cover indicates that the charging port cover is in the closed state and the charging port is not connected to the charging device, for example, when the vehicle is driving. Since A- (the first pin of the charging port) and CC2 (the second pin of the charging port) are conducted through the first terminal, the second terminal, and the resistor in the voltage adjustment module, the voltage at detection point 2 is 8V (the first voltage value). That is, when the voltage at detection point 2 is 8V, it is determined that the charging port cover is in the closed state, and the control module controls the contactor to conduct the loop between the charging port and the battery pack.

[0103] 2. When the opening and closing state of the charging port cover indicates that the charging port cover is in the open state and the charging port is not connected to the charging device, the first terminal, the second terminal, and the resistor in the voltage adjustment module are disconnected from A- and CC2, and there is an open circuit between A- and CC2, and the voltage at detection point 2 is 12V (the second voltage value). That is, when the voltage at detection point 2 of the control and guidance circuit is 12V, it is determined that the charging port cover is in the open state, and the control module controls the contactor to disconnect.

[0104] 3. When the opening and closing state of the charging port cover indicates that the charging port cover is in the open state, and the charging port is connected to the charging device, and the voltage at detection point 2 is 6V, the control module controls the contactor to conduct the circuit between the charging port and the battery pack to prepare to enter the charging process;

[0105] 4. When charging ends, when the charging port remains connected to the charging device, it is the same as in the third case; when the charging port is disconnected from the charging device and the charging port cover is in the open state, it is the same as in the second case; when the charging port cover is in the closed state, it is the same as in the first case.

[0106] According to a third aspect of the embodiments of the present disclosure, a vehicle is provided, which may include:

[0107] Any DC charging device as in the first aspect of the embodiments of the present disclosure.

[0108] The preferred embodiments of the present disclosure have been described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0109] In addition, it should be noted that, among the various specific technical features described in the above specific embodiments, they can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination methods.

[0110] Furthermore, any combination can be made between various different embodiments of the present disclosure, as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. A DC charging device, characterized in that, Including: A device body, on which a charging port is provided; A charging port cover plate, which is used to cover or expose the charging port; A detection device, which is arranged on the charging port cover plate and is used to detect the opening and closing state of the charging port cover plate; A battery pack, a contactor and a control module, the first end of the contactor is connected to the battery pack, the second end of the contactor is connected to the charging port, and the control module is connected to the control end of the contactor; The contactor is used to conduct or cut off the circuit between the charging port and the battery pack; The control module is used to control the contactor to conduct or cut off the circuit between the charging port and the battery pack according to the opening and closing state of the charging port cover plate.

2. The DC charging device according to claim 1, characterized in that, The detection device includes: A voltage adjustment module, which is used to connect to the pin of the control and guidance circuit on the charging port to adjust the voltage of the control and guidance circuit to a first voltage value when the charging port cover plate is in a closed state, and disconnect from the pin of the control and guidance circuit on the charging port to adjust the voltage of the control and guidance circuit to a second voltage value when the charging port cover plate is in an open state; The control module is used to determine the opening and closing state of the charging port cover plate according to the voltage of the control and guidance circuit.

3. The DC charging device according to claim 2, characterized in that, The voltage adjustment module includes: A first terminal, a second terminal and a resistor, the first end of the first terminal is connected to the first end of the resistor, and the first end of the second terminal is connected to the second end of the resistor; The second end of the first terminal is used to connect to the first pin of the control and guidance circuit when the charging port cover plate is in a closed state, and disconnect from the first pin of the control and guidance circuit when the charging port cover plate is in an open state; The second end of the second terminal is used to connect to the second pin of the control and guidance circuit when the charging port cover plate is in a closed state, and disconnect from the second pin of the control and guidance circuit when the charging port cover plate is in an open state.

4. The DC charging device according to claim 1, characterized in that, The control module is used to: When the opening and closing state of the charging port cover plate indicates that the charging port cover plate is in an open state, if the charging port is not connected to a charging device, control the contactor to cut off the circuit between the charging port and the battery pack.

5. A DC charging control method, characterized in that, Executed by the control module of the DC charging device as claimed in claim 1, the method includes: Determine the opening and closing state of the charging port cover plate; Control the contactor to conduct or cut off the circuit between the charging port and the battery pack according to the opening and closing state of the charging port cover plate.

6. The method according to claim 5, characterized in that, The detection device includes: A voltage adjustment module, which is used to connect to the pin of the control and guidance circuit on the charging port to adjust the voltage of the control and guidance circuit to a first voltage value when the charging port cover plate is in a closed state, and disconnect from the pin of the control and guidance circuit on the charging port to adjust the voltage of the control and guidance circuit to a second voltage value when the charging port cover plate is in an open state; Determining the opening and closing state of the charging port cover plate includes: Determining the opening and closing state of the charging port cover plate according to the voltage of the control and guiding circuit.

7. The method according to claim 5, wherein Controlling the contactor to conduct or cut off the circuit between the charging port and the battery pack according to the opening and closing state of the charging port cover plate includes: When the opening and closing state of the charging port cover plate indicates that the charging port cover plate is in the open state, if the charging port is not connected to a charging device, controlling the contactor to cut off the circuit between the charging port and the battery pack.

8. The method according to claim 7, wherein The method further includes: When the opening and closing state of the charging port cover plate indicates that the charging port cover plate is in the closed state, determining whether to control the contactor to conduct the circuit between the charging port and the battery pack according to the running state of the vehicle.

9. The method according to claim 7, characterized in that, The method further includes: When the opening and closing state of the charging port cover plate indicates that the charging port cover plate is in the open state, if the charging port is connected to a charging device, controlling the contactor to conduct the circuit between the charging port and the battery pack.

10. A vehicle, characterized in that, The vehicle includes the DC charging device according to any one of claims 1 to 4.

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