Charging device, charging control method, charging equipment and vehicle

Abstract

The invention discloses a charging device, a charging control method, charging equipment and a vehicle. The charging device comprises an input part and an output part, the input part is configured to introduce electric energy from an external power supply, and the output part is configured to charge the target electric equipment with the electric energy; the input part further comprises a temperature control switch, the temperature control switch is connected with a neutral line and / or a phase line of an external power supply through a preset heat conduction material, and the temperature control switch is configured to obtain the temperature of the neutral line and / or the phase line of the external power supply so as to change the on-off state of the temperature control switch according to the temperature. The charging device can utilize the single temperature control switch to obtain the temperature from the neutral line and / or the phase line of the external power supply through the preset heat conduction material, the temperature control switch does not need to be connected to the neutral line and the phase line in series, the obtaining efficiency of the temperature of the neutral line and the phase line is improved, frequent switching of the working state of the temperature control switch is avoided, and the charging efficiency is improved. The service life of the temperature control switch is effectively prolonged, and the occurrence probability of dangerous conditions such as overheating or spontaneous combustion is reduced.

Description

Technical Field

[0001] This application relates to the technical field, specifically to a charging device, a charging control method, a charging equipment, and a vehicle. Background Technology

[0002] Currently, the common method for over-temperature protection of vehicle charging devices is to connect a temperature control switch in series with the neutral (N) or phase (L) line of the external power supply. By detecting the number of times the temperature control switch disconnects due to over-temperature conditions, the number of times the neutral and phase lines have over-temperature is indirectly detected, thereby controlling the operating status of the charging device. However, since over-temperature conditions are often accompanied by high voltage and high current, the repeated switching of the temperature control switch under these conditions will seriously affect its service life and easily lead to oxidation of the temperature control switch contacts, thereby increasing contact resistance. Ultimately, this may lead to dangerous situations such as overheating or even spontaneous combustion of the temperature control switch itself. Summary of the Invention

[0003] This application provides a charging device, a charging control method, a charging equipment, and a vehicle.

[0004] The charging device according to the embodiments of this application includes an input section and an output section. The input section is configured to introduce electrical energy from an external power source, and the output section is configured to charge electrical energy into a target electrical device.

[0005] The input section also includes a temperature control switch, which is connected to the neutral line and / or phase line of the external power supply through a preset thermally conductive material. The temperature control switch is configured to acquire the temperature of the neutral line and / or phase line of the external power supply in order to change its own on / off state according to the temperature.

[0006] Thus, the charging device in this embodiment obtains the temperature of the neutral and / or phase lines by using a temperature control switch in the input section and through the thermally conductive connection between the temperature control switch and the neutral and / or phase lines of the external power supply. It then switches its on / off state based on the obtained temperature, thereby controlling the overall operating state of the charging device according to the temperature of the neutral and / or phase lines. Compared to current related technologies, this method utilizes a single temperature control switch to obtain the temperature of the neutral and / or phase lines of the external power supply through a pre-set thermally conductive material, eliminating the need to connect the temperature control switch in series with the neutral and phase lines. This improves the efficiency of obtaining the neutral and phase line temperatures and avoids frequent switching of the temperature control switch's operating state, effectively extending the lifespan of the temperature control switch and reducing the probability of overheating or spontaneous combustion.

[0007] In some embodiments, the charging device further includes a control unit, which includes a control module and a relay. The control module is configured to control the switching on and off of the relay based on the temperature of the neutral line and / or phase line of the external power supply. The relay is configured to control the switching on and off of the charging circuit of the charging device by its own switching on and off.

[0008] Thus, the charging device in this application embodiment can utilize the control module in the control unit to further control the on / off state of the relay based on the temperature of the neutral / phase line, thereby using a low-voltage, low-current control circuit to control the on / off state of the charging circuit with high voltage and high current.

[0009] In some embodiments, the control unit further includes a power module, wherein a first input terminal of the power module is connected to the phase line of the external power supply, a second input terminal of the power module is connected to the neutral line of the external power supply, a first output terminal of the power module is connected to the first terminal of the temperature control switch, and a second output terminal of the power module is connected to the first input terminal of the control module.

[0010] Thus, the charging device in this application embodiment can also draw power from an external power source through the power module to drive the temperature control switch and the control module to work normally.

[0011] In some implementations, the second terminal of the temperature control switch is connected to the first terminal of the first resistor, the second terminal of the first resistor is connected to the second input terminal of the control module, and the second resistor and the first capacitor are connected in parallel between the second terminal of the first resistor and ground.

[0012] Thus, in the charging device of this application embodiment, the temperature control switch is connected to the control module through a voltage divider resistor and a filter capacitor to control the input electrical signal of the control module.

[0013] In some embodiments, the control unit further includes a third resistor, a second capacitor, and an optocoupler. The first end of the third resistor is connected to the output terminal of the control module and the first end of the second capacitor. The second end of the third resistor is connected to the first input terminal of the optocoupler. The second end of the second capacitor is connected to the second input terminal of the optocoupler and is used for grounding. The receiving end of the optocoupler is connected to the first terminal of the temperature control switch, and the output terminal of the optocoupler is connected to the relay.

[0014] Thus, the charging device in this embodiment enables the control module to correctly control the on / off state of the relay by setting an optocoupler and matching current-limiting resistor and filter capacitor.

[0015] In some embodiments, the control unit further includes a third capacitor, the first terminal of which is connected to the second terminal of the temperature control switch and the first terminal of the relay, and the second terminal of the third capacitor is used for grounding.

[0016] Thus, the charging device in this application embodiment also filters the control signal of the relay by the control module by setting a filter capacitor.

[0017] In some embodiments, the control unit further includes a fourth resistor, a fifth resistor, a fourth capacitor, and a transistor. The output terminal of the optocoupler is connected to the first terminal of the fourth resistor, the second terminal of the fourth resistor is connected to the base of the transistor, the fifth resistor and the fourth capacitor are connected in parallel between the second terminal of the fourth resistor and ground, the collector of the transistor is connected to the second terminal of the relay, and the emitter of the transistor is grounded.

[0018] Thus, in the charging device of this application embodiment, the control module uses the on / off state of the temperature control switch to control the on / off state of the transistor through an optocoupler, a voltage divider resistor, and a filter capacitor, thereby controlling the on / off state of the relay.

[0019] In some embodiments, the control unit further includes a freewheeling diode, the anode of which is connected to the second terminal of the relay, and the cathode of which is connected to the first terminal of the relay.

[0020] Thus, the charging device in this application embodiment provides a freewheeling diode to provide freewheeling current to the relay's power supply coil, thereby preventing the reverse voltage generated by the relay from damaging the transistor.

[0021] In some embodiments, the control unit further includes a display module connected to the control module, the display module being configured to provide feedback information to the user via light signals to indicate the current operating status of the charging device.

[0022] Thus, in this embodiment of the application, the charging device displays the current working status of the charging device to the user by displaying light signals through the display module.

[0023] The charging control method in this application is implemented based on the above-described charging device, and the method includes:

[0024] If the charging device passes the self-test, the temperature control switch closes, and the control module controls the relay to conduct, thereby controlling the charging circuit of the charging device to conduct.

[0025] The temperature control switch acquires the temperature of the neutral line and / or phase line of the external power supply.

[0026] When the temperature of the neutral line and / or phase line of the external power supply meets the first preset condition, the temperature control switch is turned off, and the control module controls the relay to turn off, thereby controlling the charging circuit of the charging device to be disconnected.

[0027] In some embodiments, the method further includes:

[0028] If the temperature of the neutral line and / or phase line of the external power supply does not meet the first preset condition and does not meet the second preset condition, the temperature control switch is turned off, and the control module controls the relay to turn off, so as to control the charging circuit of the charging device to be disconnected.

[0029] In some embodiments, the method further includes:

[0030] If the temperature of the neutral line and / or phase line of the external power supply does not meet the first preset condition but meets the second preset condition, the temperature control switch remains closed, and the control module keeps the relay conducting to keep the charging circuit of the charging device conducting.

[0031] The charging device in the embodiments of this application includes the charging apparatus described above; and / or

[0032] The charging device can implement the charging control method described above.

[0033] The vehicle in this application embodiment includes the aforementioned charging device; and / or

[0034] The charging device can implement the charging control method described above.

[0035] Additional aspects and advantages of embodiments of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of embodiments of this application. Attached Figure Description

[0036] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0037] Figure 1 This is a schematic diagram of the structural appearance of the charging device in the embodiments of this application;

[0038] Figure 2 This is one of the circuit structure diagrams of the charging device in the embodiments of this application;

[0039] Figure 3 This is a second schematic diagram of the circuit structure of the charging device in the embodiments of this application;

[0040] Figure 4This is one of the flowcharts illustrating the charging control method in the embodiments of this application;

[0041] Figure 5 This is the second flowchart illustrating the charging control method in the embodiments of this application.

[0042] The components are as follows: 10, Input section; 20, Control section; 30, Output section; 40, Cable; 50, Display module; BAT, Power module; K2, Temperature control switch; R1, First resistor; R2, Second resistor; C1, First capacitor; C1', First capacitor; Ctrl, Control module; R3, Third resistor; C2, Second capacitor; U1, Optocoupler; C3, Third capacitor; C3', Third capacitor; K1, Relay; Coil, Control coil; R4, Fourth resistor; R5, Fifth resistor; C4, Fourth capacitor; Q1, Transistor; D1, Freewheeling diode. Detailed Implementation

[0043] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of this application, and should not be construed as limiting the embodiments of this application.

[0044] Please see Figure 1 as well as Figure 2 The charging device in this application includes an input section 10 and an output section 30. The input section 10 is configured to introduce electrical energy from an external power source, and the output section 30 is configured to charge electrical energy into a target electrical device.

[0045] The input unit 10 also includes a temperature control switch K2, which is connected to the neutral line and / or phase line of the external power supply through a preset thermally conductive material. The temperature control switch K2 is configured to obtain the temperature of the neutral line and / or phase line of the external power supply so as to change the on / off state of the temperature control switch K2 according to the temperature.

[0046] Specifically, the charging device in this application generally refers to a device that performs charging operations for a target electrical device, wherein the target electrical device generally refers to a vehicle that is powered primarily or secondarily by electrical energy. The charging device includes an input section 10 and an output section 30, which are connected by a cable 40. The input section 10 is directly connected to an external power source, while the output section 30 is directly connected to the vehicle. The input section 10 is generally configured with a three-prong plug to connect to the neutral line N, phase line L, and ground line PE of the external power source, respectively. During charging, electrical energy is introduced from the external power source into the charging device through the input section 10, and then conducted through the cable 40 within the charging device to the vehicle via the output section 30.

[0047] Furthermore, in addition to the three-prong plug, the input unit 10 also includes a temperature control switch K2. Generally, only one temperature control switch K2 can be provided. The main function of the temperature control switch K2 is to control its own on / off state by detecting the temperature of one or both of the neutral line and phase line of the external power supply, thereby realizing the control of the overall working state of the charging device. The aforementioned temperature detection process relies on the connection between the temperature control switch K2 and the neutral and phase lines. For example, the temperature control switch K2 is connected to at least one of the neutral and phase lines through a preset thermal grease or other type of thermally conductive material, but it is not directly connected in series with the neutral and phase lines in the circuit connection. In this way, by bypassing the temperature control switch K2 and additionally setting up thermal conductivity, the temperature control switch K2 can be placed in a low-current, low-voltage bypass working environment, while ensuring that the temperature on the thermally conductive detection line is used to achieve the on / off switching effect. This effectively avoids the temperature control switch K2 operating in a high-current, high-voltage circuit environment when it is directly connected to one of the neutral and phase lines, thereby improving the working life of the temperature control switch K2, reducing the increase in resistance caused by oxidation of the switch contacts, improving the overall safety and service life of the charging device, and reducing the probability of dangerous situations such as spontaneous combustion.

[0048] The following example illustrates how temperature control switch K2 operates: K2 typically has two temperature control thresholds, with the first threshold being higher than the second. By default, K2 is closed. When K2 detects that the temperature of at least one of the neutral or phase lines is greater than or equal to the first threshold, it triggers a state switch and opens. This disconnects the charging device, halting the charging process. Furthermore, when the temperature drops from above or below the first threshold, it is further monitored. If the temperature remains above or equal to the second threshold, K2 remains open, blocking the charging process and waiting for the power supply line to cool down until the temperature falls below the second threshold. At this point, K2 re-triggers a state switch and opens, preventing the charging device or power supply line from spontaneously combusting due to overheating.

[0049] Thus, the charging device in this embodiment obtains the temperature of the neutral and / or phase lines by using a temperature control switch K2 installed in the input section 10 and through the thermally conductive connection between the temperature control switch K2 and the neutral and / or phase lines of the external power supply. It then switches its on / off state based on the obtained temperature, thereby controlling the overall operating state of the charging device according to the temperature of the neutral and / or phase lines. Compared to current related technologies, this method utilizes a single temperature control switch K2 with a pre-set thermally conductive material to obtain the temperature of the neutral and / or phase lines of the external power supply, eliminating the need to connect the temperature control switch K2 in series with the neutral and phase lines. This improves the efficiency of obtaining the temperature of the neutral and phase lines, avoids frequent switching of the operating state of the temperature control switch K2, effectively extends the service life of the temperature control switch K2, and reduces the probability of overheating or spontaneous combustion.

[0050] Please continue reading. Figure 1 as well as Figure 2 The charging device also includes a control unit 20, which includes a control module Ctrl and a relay K1. The control module Ctrl is configured to control the on / off state of the relay K1 based on the temperature of the neutral line and / or phase line of the external power supply. The relay K1 is configured to control the on / off state of the charging circuit of the charging device by using its own on / off state.

[0051] Specifically, based on the above-described embodiments, in addition to the input unit 10 and the output unit 30, the charging device also includes a control unit 20, such as... Figure 1 as well as Figure 2 As shown, the control unit 20 is located between the input unit 10 and the output unit 30, and is connected to both the input unit 10 and the output unit 30 via a cable 40. The control unit 20 includes a control module Ctrl and a relay K1. The control module Ctrl is generally a pre-set chip, while the relay K1 is used to control the on / off state of the charging circuit in the charging device through its own state switching. The control module Ctrl and the relay K1 are electrically connected. The main function of the control module Ctrl is to use the temperature control switch K2 to send a corresponding control signal to the relay K1 according to the on / off state of at least one of the neutral line and the phase line, thereby realizing the state switching of the relay K1. The charging circuit, corresponding to the external power supply, includes a neutral line N1, a phase line L1, and a ground line PE. The charging circuit is generally located in the cable 40 of the charging device, with its input end being the input unit 10 of the charging device and its output end being the output unit 30 of the charging device.

[0052] Thus, the charging device in this embodiment can use the control module Ctrl in the control unit 20 to further control the on / off state of the relay K1 based on the temperature of the neutral / phase line, thereby using a low-voltage, low-current control circuit to control the on / off state of the charging circuit with high voltage and high current.

[0053] Please see Figure 2 In some embodiments, the control unit 20 further includes a power module BAT, the first input terminal of the power module BAT is connected to the phase line of the external power supply, the second input terminal of the power module BAT is connected to the neutral line of the external power supply, the first output terminal of the power module BAT is connected to the first terminal of the temperature control switch K2, and the second output terminal of the power module BAT is connected to the first input terminal of the control module Ctrl.

[0054] Specifically, based on the above-described embodiment, the control unit 20 also includes a power module BAT. The main function of the power module BAT is to draw power from an external power source and convert the obtained electrical energy into the current and voltage form supported by the various components included in the charging device. For example, when the external power source is one of the line voltages of a three-phase AC power source, after the input unit 10 introduces electrical energy into the charging device, the power module BAT obtains the aforementioned AC power and converts it into 12V DC current commonly used in electronic circuits. This achieves the conversion of high-current, high-voltage electrical energy into low-current, low-voltage electrical energy to ensure the electrical safety of bypass control. For the circuit connection method of the power module BAT, please refer to [link to relevant documentation]. Figure 2 The power module BAT typically has two sets of output terminals and two sets of input terminals. The two sets of input terminals are connected to the neutral line and phase line of the external power supply, respectively, while the two sets of output terminals are connected to the temperature control switch K2 and the control module Ctrl, respectively, to provide power to the temperature control switch K2 and the control module Ctrl. This activates the temperature monitoring function of the temperature control switch K2 and ensures the control function of the control module Ctrl on the relay K1.

[0055] Thus, the charging device in this embodiment can also draw power from an external power source through the power module BAT to drive the temperature control switch K2 and the control module Ctrl to work normally.

[0056] Please see Figure 2 In some implementations, the second terminal of the temperature control switch K2 is connected to the first terminal of the first resistor R1, the second terminal of the first resistor R1 is connected to the second input terminal of the control module Ctrl, and the second resistor R2 and the first capacitor C1 are connected in parallel between the second terminal of the first resistor R1 and ground.

[0057] Specifically, based on the above implementation method, for the connection method of the input terminal of the control module Ctrl, its first input terminal is connected as the power supply terminal to the second output terminal of the power module BAT, while the second input terminal is used to connect to the temperature control switch K2, thereby realizing the control of the relay K1 by using the on / off state of the temperature control switch K2. Specifically, with the first terminal of the temperature control switch K2 connected to the power module BAT, its second terminal is processed by the circuit of the first resistor R1, the second resistor R2, and the first capacitor C1 and input to the signal terminal (i.e., the second input terminal) of the control module Ctrl. Among them, the first resistor R1 is connected to the second terminal of the temperature control switch K2, the second terminal of the first resistor R1 is connected to the signal terminal of the control module Ctrl, the second resistor R2 is connected between the second terminal of the first resistor R1 and ground, and the first capacitor C1 is also connected between the second terminal of the first resistor R1 and ground. Among the above components, the first resistor R1 and the second resistor R2 act as a voltage divider, while the first capacitor C1 acts as a filter.

[0058] In other examples, please refer to Figure 3 Since the charging device may be used in various environments, the current or voltage through the charging device may vary. Therefore, the first capacitor mentioned above can also be set as two capacitors C1 and C1' connected in parallel. The capacitance values ​​of C1 and C1' are significantly different, and their equivalent capacitance is equal to the first capacitor mentioned above, so as to ensure that the filtering effect of the capacitor is not affected under different current and voltage conditions.

[0059] Thus, in the charging device of this application embodiment, the temperature control switch K2 is connected to the control module Ctrl through a voltage divider resistor and a filter capacitor to control the electrical signal at the input terminal of the control module Ctrl.

[0060] Please see Figure 2 In some embodiments, the control unit 20 further includes a third resistor R3, a second capacitor C2, and an optocoupler U1. The first end of the third resistor R3 is connected to the output end of the control module Ctrl and the first end of the second capacitor C2. The second end of the third resistor R3 is connected to the first input end of the optocoupler U1. The second end of the second capacitor C2 is connected to the second input end of the optocoupler U1 and is used for grounding. The receiving end of the optocoupler U1 is connected to the first end of the temperature control switch K2. The output end of the optocoupler U1 is connected to the relay K1.

[0061] Specifically, based on the above implementation method, exemplarily, the control module Ctrl controls the on / off state of relay K1 through optocoupler U1. The connection relationship between control module Ctrl and optocoupler U1 is as follows: In addition to optocoupler U1, control unit 20 also includes a third resistor R3 and a second capacitor C2. The third resistor R3 is connected to the output terminal of control module Ctrl and the first input terminal of optocoupler U1, while the second capacitor C2 is connected to the output terminal of control module Ctrl and the second input terminal of optocoupler U1. The second input terminal of optocoupler U1 is grounded. Furthermore, the receiving terminal of optocoupler U1 is connected to the first terminal of temperature control switch K2 in the above implementation method, and the output terminal of optocoupler U1 is connected to relay K1. In this way, control module Ctrl can control the on / off state of relay K1 using optocoupler U1 according to the on / off state of temperature control switch K2. For example, when the power module BAT is working and the temperature control switch K2 is closed, the 12V DC current converted by the power module BAT is input to the control module Ctrl through the voltage division of the first resistor R1 and the second resistor R2 and the filtering of the first capacitor C1. At this time, the signal terminal of the control module Ctrl detects a high-level enable signal. However, when the temperature control switch K2 is open, the signal terminal of the control module Ctrl is open, and the detection result of its enable signal is low.

[0062] When the signal terminal of the control module Ctrl detects a high level for the enable signal, the output terminal of the control module Ctrl outputs a high-level control signal to the first input terminal of the optocoupler U1. At this time, under the current limiting effect of the third resistor R3 and the filtering effect of the second capacitor C2, the optocoupler U1 is turned on due to the high-level control signal. The optocoupler U1 further sends an electrical signal to the relay K1 to generate current in the control coil Coil of the relay K1, thereby controlling the relay K1 to turn on.

[0063] When the signal terminal of the control module Ctrl detects a low level for the enable signal, the output terminal of the control module Ctrl outputs a low-level control signal to the first input terminal of the optocoupler U1. At this time, the optocoupler U1 is in the off state, and there is no current in the control coil Coil of the relay K1. At this time, the relay K1 is in the open state.

[0064] Thus, the charging device in this embodiment of the application enables the control module Ctrl to correctly control the on / off state of the relay K1 by setting up an optocoupler U1 and a matching current-limiting resistor and filter capacitor.

[0065] Please see Figure 2 In some embodiments, the control unit 20 further includes a third capacitor C3, the first end of which is connected to the second end of the temperature control switch K2 and the first end of the relay K1, and the second end of the third capacitor C3 is used for grounding.

[0066] Specifically, based on the above implementation, the current source in the control coil Coil of relay K1 is the power module BAT. When the power module BAT is working and the temperature control switch K2 is closed, the control coil Coil of relay K1 is directly connected to the second terminal of the temperature control switch K2. In the above implementation, the control module Ctrl and the optocoupler U1 actually control whether the control coil Coil of relay K1 can form a circuit. Furthermore, exemplarily, the control unit 20 also includes a third capacitor C3, wherein the first terminal of the third capacitor C3 is connected to the first terminal of relay K1 (i.e., the first terminal of the control coil Coil), and the second terminal of the third capacitor C3 is grounded. The main function of the third capacitor C3 is filtering to process the current input to the control coil Coil.

[0067] In addition, see other examples. Figure 3 Since the charging device may be used in various environments, the current or voltage through the charging device may vary. Therefore, the third capacitor mentioned above can also be set as two capacitors C3 and C3' connected in parallel. The capacitance values ​​of C3 and C3' are significantly different, and their equivalent capacitance is equal to the third capacitor mentioned above, so as to ensure that the filtering effect of the capacitor is not affected under different current and voltage conditions.

[0068] Thus, the charging device in this embodiment of the application also filters the control signal of the relay K1 from the control module Ctrl by setting a filter capacitor.

[0069] Please see Figure 2 In some embodiments, the control unit 20 further includes a fourth resistor R4, a fifth resistor R5, a fourth capacitor C4, and a transistor Q1. The output terminal of the optocoupler U1 is connected to the first terminal of the fourth resistor R4, the second terminal of the fourth resistor R4 is connected to the base of the transistor Q1, the fifth resistor R5 and the fourth capacitor C4 are connected in parallel between the second terminal of the fourth resistor R4 and ground, the collector of the transistor Q1 is connected to the second terminal of the relay K1, and the emitter of the transistor Q1 is used for grounding.

[0070] Specifically, based on the above implementation method, for the specific method by which the control module Ctrl controls the on / off state of the relay K1 through the optocoupler U1, please refer to [link to relevant documentation]. Figure 2 The control unit 20 is also equipped with a transistor Q1 and a matching fourth resistor R4, a fifth resistor R5 and a fourth capacitor C4. The main function of the transistor Q1 is to control whether there is current in the control coil Coil of the relay K1 by using its own conduction and cutoff, thereby controlling the on and off of the relay K1.

[0071] Specifically, the fourth resistor R4 and the fifth resistor R5 are voltage divider resistors. The first terminal of the fourth resistor R4 is connected to the output terminal of the optocoupler U1, and the second terminal of the fourth resistor R4 is connected to the base of the transistor Q1. The first terminal of the fifth resistor R5 is connected to the second terminal of the fourth resistor R4, and the second terminal of the fifth resistor R5 is grounded. The third capacitor C3 is a filter capacitor. The first terminal of the third capacitor C3 is connected to the second terminal of the fourth resistor R4, and the second terminal of the third capacitor C3 is grounded. The emitter of the transistor Q1 is grounded, and the collector of the transistor Q1 is connected to the second terminal of the relay K1 (i.e., the second terminal of the control coil Coil).

[0072] Given the above connection, the control unit 20 controls the on / off state of relay K1 as follows:

[0073] When the temperature control switch K2 is closed, causing the optocoupler U1 to output a high-level signal, the collector and emitter of the transistor Q1 are connected. At this time, the control coil Coil of the relay K1 forms a current loop. When the temperature control switch K2 introduces DC current, the relay K1 is turned on, and the charging circuit of the charging device is turned on.

[0074] When the temperature control switch K2 is turned off, causing the optocoupler U1 to output a low-level signal, the collector and emitter of the transistor Q1 are cut off. At this time, the control coil Coil of the relay K1 does not form a current loop, the relay K1 is turned off, and the charging circuit of the charging device is disconnected.

[0075] Thus, in the charging device of this application embodiment, the control module Ctrl uses the on / off state of the temperature control switch K2 to control the on / off state of the transistor Q1 through the optocoupler U1, the voltage divider resistor and the filter capacitor, thereby controlling the on / off state of the relay K1.

[0076] Please see Figure 2 In some embodiments, the control unit 20 further includes a freewheeling diode D1, the anode of the freewheeling diode D1 being connected to the second terminal of the relay K1, and the cathode of the freewheeling diode D1 being connected to the first terminal of the relay K1.

[0077] Specifically, based on the above implementation, when the temperature control switch K2 switches from the closed state to the de-energized state, the relay K1 generates a reverse voltage. If this reverse voltage exceeds the limit that the transistor Q1 can withstand, the transistor Q1 may be damaged by the reverse voltage. Therefore, for example, a freewheeling diode D1 is provided across the control coil Coil of the relay K1. The anode of the freewheeling diode D1 is connected to the second terminal of the relay K1, that is, to the collector of the transistor Q1, and the cathode of the freewheeling diode D1 is connected to the first terminal of the relay K1. Then, when the temperature control switch K2 switches from the closed state to the de-energized state, the freewheeling diode D1 will provide freewheeling current to the control coil Coil of the relay K1, thereby preventing the reverse voltage from damaging the transistor Q1 and providing electrical protection for the transistor Q1.

[0078] Thus, in the embodiment of this application, the charging device provides freewheeling diode D1 to provide freewheeling current to the power supply coil of relay K1, thereby preventing the reverse voltage generated by relay K1 from damaging transistor Q1.

[0079] Please see Figure 1 as well as Figure 2 In some embodiments, the control unit further includes a display module connected to the control module. The display module is configured to provide feedback information to the user through light signals to indicate the current operating status of the charging device.

[0080] It should be noted that, Figure 1 Display module 5 and Figure 2 The LED display modules in the text share the same technical features.

[0081] Specifically, based on the above implementation methods, please refer to... Figure 3 The control unit 20 also includes a display module LED. This LED, typically a light-emitting diode or other light-emitting element, primarily functions to provide information to the user via LED signals under the control of the control module Ctrl, thus informing the user of the current operating status of the charging device. Specific LED signals can be preset within the control module Ctrl. When the control module Ctrl outputs different control signals, it can recall the corresponding LED signal and control the LED to light up or turn off in that signal, providing feedback to the user. For example, a flashing pattern at equal intervals indicates normal charging, a constantly lit LED indicates that relay K1 is disconnected, and an off LED indicates that the charging device is not currently connected to power.

[0082] Thus, the charging device in this embodiment of the application uses LED display modules to indicate the current working status of the charging device to the user.

[0083] Please see Figure 4The charging control method in this application is implemented based on the above-mentioned charging device, and the method includes:

[0084] 01: When the charging device passes the self-test, the temperature control switch K2 closes, and the control module Ctrl controls the relay K1 to conduct, thereby controlling the charging circuit of the charging device to conduct.

[0085] 02: Temperature control switch K2 obtains the temperature of the neutral and / or phase lines of the external power supply;

[0086] 03: When the temperature of the neutral line and / or phase line of the external power supply meets the first preset condition, the temperature control switch K2 is opened, and the control module Ctrl controls the relay K1 to open, so as to control the charging circuit of the charging device to be disconnected.

[0087] Specifically, based on the charging device described in the above embodiments, this application also provides a charging control method, which is implemented based on the charging device described in the above embodiments. The specific steps are as follows:

[0088] First, when the input section is connected to an external power source and the output section is connected to the target charging device, the power module BAT will generally start automatically. At this time, the power supply terminal of the control module Ctrl is powered by the power module BAT and starts to perform a self-test for the charging device. If the charging device fails the self-test, the charging device cannot be powered on normally. When the charging device passes the self-test, the temperature control switch K2 is closed by default. At this time, the signal terminal of the control module Ctrl receives a high-level enable signal and further sends a high-level control signal to the optocoupler U1. The optocoupler U1 responds to the high-level control signal and outputs a high-level signal to the base of the transistor Q1, thereby turning on the transistor Q1. At this time, current flows through the control coil Coil of the relay K1, and the relay K1 is turned on, and the charging circuit is in a conducting state. In this state, the temperature control switch K2 detects the temperature of at least one of the neutral and phase lines through its connection to at least one of them. If the detected temperature meets the first preset condition, the temperature control switch K2 is disconnected. At this time, the signal terminal of the control module Ctrl receives a low-level enable signal and further sends a low-level control signal to the optocoupler U1. At this time, the optocoupler U1 outputs a low-level signal to the base of the transistor Q1, and the transistor Q1 is cut off. At this time, there is no current in the control coil Coil of the relay K1, and the relay K1 is disconnected. The charging circuit is switched to the disconnected state, thereby blocking the charging process. The first preset condition generally refers to the temperature being greater than or equal to a first threshold preset by the temperature control switch K2. For example, the first threshold can generally be set to 85°C.

[0089] Please see Figure 5 In some embodiments, the charging control method further includes:

[0090] 041: If the temperature of the neutral line and / or phase line of the external power supply does not meet the first preset condition and does not meet the second preset condition, the temperature control switch K2 will be turned off, and the control module Ctrl will control the relay K1 to be turned off, so as to control the charging circuit of the charging device to be turned off.

[0091] Please see Figure 5 In some embodiments, the charging control method further includes:

[0092] 042: When the temperature of the neutral line and / or phase line of the external power supply does not meet the first preset condition but meets the second preset condition, the temperature control switch K2 remains closed, and the control module Ctrl keeps the relay K1 conducting to keep the charging circuit of the charging device conducting.

[0093] Specifically, based on the above implementation, when the temperature control switch K2 is disconnected because the temperature of at least one of the neutral line and the phase line is greater than or equal to the first threshold, for example, when the power module BAT is continuously working, the temperature control switch K2 continuously collects the temperature of at least one of the neutral line and the phase line. If the temperature drops to a range less than the first threshold (corresponding to not meeting the first preset condition), the temperature control switch K2 is used to further continuously detect the temperature of at least one of the neutral line and the phase line. If the temperature is still greater than or equal to the second threshold (corresponding to not meeting the second preset condition), the temperature of the neutral line and the phase line still poses a risk to the operation of the charging device. At this time, the temperature control switch K2 remains disconnected. At this time, the signal terminal of the control module Ctrl receives a low-level enable signal and further sends a low-level control signal to the optocoupler U1. At this time, the optocoupler U1 outputs a low-level signal to the base of the transistor Q1, the transistor Q1 is cut off, there is no current in the control coil Coil of the relay K1, the relay K1 is disconnected, and the charging circuit remains disconnected.

[0094] Furthermore, if the temperature drops below the second threshold (corresponding to meeting the second preset condition), the temperature of the neutral and phase lines poses no risk to the operation of the charging device. At this time, the temperature control switch K2 switches to the closed state, the signal terminal of the control module Ctrl receives a high-level enable signal, and further sends a high-level control signal to the optocoupler U1. The optocoupler U1 responds to the high-level control signal by outputting a high-level signal to the base of the transistor Q1, thereby turning on the transistor Q1. At this time, current flows through the control coil Coil of the relay K1, the relay K1 is turned on, and the charging circuit switches to the conducting state. At this time, the charging device can perform charging normally. The second preset condition generally refers to the temperature being greater than or equal to the second threshold preset by the temperature control switch K2. For example, the first threshold can generally be set to 75°C.

[0095] The charging device in the embodiments of this application includes the charging apparatus described above; and / or

[0096] The charging equipment can implement the charging control methods described above.

[0097] The vehicle in this application embodiment includes the aforementioned charging device; and / or

[0098] The charging equipment can implement the charging control methods described above.

[0099] In the description of this specification, the references to terms such as "some embodiments," "in one example," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example 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.

[0100] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this application pertain.

[0101] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A charging device, characterized in that, The charging device includes an input section and an output section. The input section is configured to draw electrical energy from an external power source, and the output section is configured to charge electrical energy into a target electrical device. The input section also includes a temperature control switch, which is connected to the neutral line and / or phase line of the external power supply through a preset thermally conductive material. The temperature control switch is configured to acquire the temperature of the neutral line and / or phase line of the external power supply in order to change its own on / off state according to the temperature.

2. The apparatus according to claim 1, characterized in that, The charging device further includes a control unit, which includes a control module and a relay. The control module is configured to control the on / off state of the relay based on the temperature of the neutral line and / or phase line of the external power supply. The relay is configured to control the on / off state of the charging circuit of the charging device by its own on / off state.

3. The apparatus according to claim 2, characterized in that, The control unit also includes a power module, the first input terminal of which is connected to the phase line of the external power supply, the second input terminal of which is connected to the neutral line of the external power supply, the first output terminal of which is connected to the first terminal of the temperature control switch, and the second output terminal of which is connected to the first input terminal of the control module.

4. The apparatus according to claim 2, characterized in that, The second end of the temperature control switch is connected to the first end of the first resistor, the second end of the first resistor is connected to the second input end of the control module, and the second resistor and the first capacitor are connected in parallel between the second end of the first resistor and ground.

5. The apparatus according to claim 2, characterized in that, The control unit also includes a third resistor, a second capacitor, and an optocoupler. The first end of the third resistor is connected to the output end of the control module and the first end of the second capacitor. The second end of the third resistor is connected to the first input end of the optocoupler. The second end of the second capacitor is connected to the second input end of the optocoupler and is used for grounding. The receiving end of the optocoupler is connected to the first end of the temperature control switch. The output end of the optocoupler is connected to the relay.

6. The apparatus according to claim 5, characterized in that, The control unit also includes a third capacitor, the first end of which is connected to the second end of the temperature control switch and the first end of the relay, and the second end of the third capacitor is used for grounding.

7. The apparatus according to claim 6, characterized in that, The control unit also includes a fourth resistor, a fifth resistor, a fourth capacitor, and a transistor. The output terminal of the optocoupler is connected to the first terminal of the fourth resistor, the second terminal of the fourth resistor is connected to the base of the transistor, the fifth resistor and the fourth capacitor are connected in parallel between the second terminal of the fourth resistor and ground, the collector of the transistor is connected to the second terminal of the relay, and the emitter of the transistor is used for grounding.

8. The apparatus according to claim 7, characterized in that, The control unit also includes a freewheeling diode, the anode of which is connected to the second terminal of the relay, and the cathode of which is connected to the first terminal of the relay.

9. The apparatus according to any one of claims 2-8, characterized in that, The control unit also includes a display module connected to the control module. The display module is configured to provide feedback information to the user through light signals to indicate the current operating status of the charging device.

10. A charging control method, characterized in that, The charging control method is implemented based on the charging device according to any one of claims 1-9, and the method includes: If the charging device passes the self-test, the temperature control switch closes, and the control module controls the relay to conduct, thereby controlling the charging circuit of the charging device to conduct. The temperature control switch acquires the temperature of the neutral line and / or phase line of the external power supply. When the temperature of the neutral line and / or phase line of the external power supply meets the first preset condition, the temperature control switch is turned off, and the control module controls the relay to turn off, thereby controlling the charging circuit of the charging device to be disconnected.

11. The method according to claim 10, characterized in that, The method further includes: If the temperature of the neutral line and / or phase line of the external power supply does not meet the first preset condition and does not meet the second preset condition, the temperature control switch is turned off, and the control module controls the relay to turn off, so as to control the charging circuit of the charging device to be turned off.

12. The method according to claim 10, characterized in that, The method further includes: If the temperature of the neutral line and / or phase line of the external power supply does not meet the first preset condition but meets the second preset condition, the temperature control switch remains closed, and the control module keeps the relay conducting to keep the charging circuit of the charging device conducting.

13. A charging device, characterized in that, The charging device includes the charging apparatus as described in any one of claims 1-9; and / or The charging device can implement the charging control method as described in any one of claims 10-12.

14. A vehicle, characterized in that, The vehicle includes a charging device as described in any one of claims 1-9; and / or The vehicle is capable of implementing the charging control method as described in any one of claims 10-12.

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