A vehicle charger with external wake-up function

Abstract

The present invention discloses an on-board charger with an external wake-up function, comprising an on-board charger body and a DC converter. The on-board charger body includes a control unit, an input / output unit, a power unit, and a low-voltage auxiliary unit. The input / output unit is used to connect to external AC power and output DC power to an external power battery. The power unit is used to complete the conversion from AC to high-voltage DC to low-voltage DC. The low-voltage auxiliary unit serves as an auxiliary power supply. The AC input connector, input / output connector, and DC output positive connector are respectively connected to the power unit. The signal connector is connected to the control unit. An external enable wake-up pin is provided in the signal connector. A heat dissipation mechanism is provided on the upper portion of the housing. An auxiliary wake-up unit is also provided inside the housing. The present invention uses the external enable wake-up pin to wake up the main control unit MCU when the OBC is dormant or the charging gun is not connected, so as to wait for instructions from the external battery management system.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle-mounted electric machines, and in particular to a vehicle-mounted charger with an external wake-up function. Background Art

[0002] New energy vehicles require an onboard charger to safely and automatically charge the power battery. Based on data provided by the battery management system (BMS), the charger can dynamically adjust the charging current or voltage parameters and perform corresponding actions to complete the charging process. To reduce power consumption, the onboard charger (OBC) enters a dormant state when not charging. If recharging is required, the charger's main control unit (MCU) must be awakened to facilitate communication with the external battery management system (BMS). Existing chargers wake up the charger by detecting the CP signal after the car is connected to the charging gun. They do not have an external wake-up function. When the vehicle is not turned on, the OBC is dormant, or the charging gun is not connected, the charger cannot communicate with the battery management system, and users cannot remotely obtain power battery information online. Summary of the Invention

[0003] The object of the present invention is to provide a vehicle-mounted charger with an external wake-up function to solve the problems raised in the above background technology.

[0004] To achieve the above objectives, the present invention provides the following technical solutions: an on-board charger with an external wake-up function, comprising an on-board charger body and a DC converter, the on-board charger body including a control unit, an input / output unit, a power unit, and a low-voltage auxiliary unit, the input / output unit being used to connect to external AC power and output DC power to an external power battery, the power unit being connected to the input / output unit for completing AC to high-voltage DC to low-voltage DC conversion, and the low-voltage auxiliary unit serving as an auxiliary power source; the input / output unit comprising an AC input connector, a signal connector, an input / output connector, and a DC output positive connector, the AC input connector, the input / output connector, and the DC output positive connector being respectively connected to the power unit, the signal connector being connected to the control unit, and an external enable wake-up pin being provided within the signal connector; a heat dissipation mechanism being provided on the upper portion of the housing, the heat dissipation mechanism being connected to the control unit, and an auxiliary wake-up unit being further provided within the housing for waking up the control unit to await instructions from the external battery management system when the vehicle is not powered on or the charging gun is not connected.

[0005] Preferably, the control unit includes a main control unit, which is connected to an external enable wake-up pin. After the main control unit receives a high-level signal input from the external enable wake-up pin, it ends the sleep state and waits for instructions from an external battery management system.

[0006] Preferably, the auxiliary wake-up unit includes a communication module and an auxiliary wake-up module, the auxiliary wake-up module is connected to the control unit and the external enable wake-up pin, the communication module is connected to the auxiliary wake-up module, and the auxiliary wake-up module is connected to the low-voltage auxiliary unit to obtain power through the low-voltage auxiliary unit;

[0007] Preferably, the auxiliary wake-up module includes a single-chip microcomputer and an expansion storage module connected thereto.

[0008] Preferably, the input and output connector is an OBC output connector.

[0009] Preferably, the power unit includes a power factor correction circuit and a resonant conversion circuit connected thereto, the input end of the power factor correction circuit is connected to the AC input connector, and the output end of the resonant conversion circuit is respectively connected to the input and output connectors and the DC output positive connector.

[0010] Preferably, the input / output connector is a DC input connector, and the input / output connector is connected to a resonant conversion circuit.

[0011] Preferably, the housing includes a base and an outer shell, and a ventilation valve is provided on one side of the outer shell, and the ventilation valve is a one-way valve.

[0012] Preferably, a heat-conducting housing is provided inside the housing, a temperature sensor is provided inside the heat-conducting housing, the temperature sensor is connected to the main control unit, and the signal connector is connected to an external on-board computer;

[0013] The heat-conducting housing body is molded with multiple fixing grooves, which match the on-board charger body and DC converter and are used to fix and wrap the electronic components on the charger and DC converter. The bottom of the fixing groove is sealed by providing a heat-conducting sheet. A heat-conducting plate is provided on the upper side of the heat-conducting housing. A through hole is provided in the middle of the heat-conducting plate, and a flow guide pipe is provided in the through hole. A connecting valve is connected to the middle of the flow guide pipe, and the upper part of the flow guide pipe passes through the outer shell and extends to the bottom of the cooling fan. The connecting valve is a solenoid valve, and the connecting valve is connected to the main control unit.

[0014] Preferably, a plurality of heat dissipation holes are evenly arranged in the heat conducting plate.

[0015] Preferably, the heat dissipation mechanism includes a heat dissipation fan and a plurality of heat sinks arranged around the heat dissipation fan, the heat sinks are connected to the surface of the outer shell, and an air outlet cooperating with the heat dissipation fan is opened on the upper part of the outer shell, the diameter of the air outlet is smaller than the diameter of the air guide pipe, and the upper part of the air guide pipe is connected to the upper shell surface outside the air outlet.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention provides a main control unit, which is connected to the external enable wake-up pin 3; in use, when the on-board charger body enters sleep mode or the CP is not connected, a high level is input through the external enable wake-up pin to wake up the main control unit, end the sleep mode, and wait for instructions from the external battery management system.

[0018] The auxiliary wake-up module provided in the present invention is connected to the low-voltage auxiliary unit and obtains electrical energy through the low-voltage auxiliary unit; after receiving the signal, the communication module sends a signal to the auxiliary wake-up module, and the auxiliary wake-up module receives the signal; in this way, the user can remotely wake up the main control unit through the control terminal connected to the communication module, and the main control unit establishes communication with the external BMS to obtain data information of the power battery, such as power and endurance information, so that the vehicle's power information can be obtained without entering the vehicle.

[0019] 3. In the present invention, the heat-conducting shell mold is formed with multiple fixed grooves, the bottom of the fixed grooves is sealed by installing a heat-conducting sheet, and multiple heat dissipation holes are evenly opened in the heat-conducting sheet to ensure heat dissipation; a heat-conducting plate is installed on the upper side of the heat-conducting shell, and the heat-conducting shell in contact with the components in the main control unit conducts heat out, and the heat dissipation holes opened on the heat-conducting sheet facilitate heat dissipation, and the heat of the heat-conducting shell is transferred to the outer shell, and the heat is quickly conducted out through the heat sink installed on the surface of the outer shell; after the cooling fan is started, the hot air under the heat-conducting plate is extracted, and the air vent valve opens after the pressure difference on both sides reaches the set value, and the external air enters the interior of the heat-conducting shell, which can realize the exchange of internal and external air. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is an exploded diagram of the overall structure of an on-board charger with an external wake-up function according to the present invention;

[0021] Figure 2 This is a schematic diagram of the front structure of the assembly structure of the present invention;

[0022] Figure 3 For the present invention Figure 2 Cross-section in the AA direction;

[0023] Figure 4 It is a top view structural diagram of the present invention;

[0024] Figure 5 This is a schematic diagram of the installation structure of the heat-conducting housing and the heat-conducting plate of the present invention;

[0025] Figure 6 This is a block diagram of the module principle of the present invention.

[0026] In the figure: on-board charger body 1, control unit 101, input / output unit 102, power unit 103, low-voltage auxiliary unit 104, DC converter 2, external enable wake-up pin 3, shell 4, auxiliary wake-up unit 5, AC input connector 1021, signal connector 1022, input / output connector 1023, DC output positive connector 1024, auxiliary wake-up unit 5, communication module 501, auxiliary wake-up module 502, fixing slot 6, heat conducting plate 7, guide tube 8, heat dissipation mechanism 9, heat sink 901, and ventilation valve 10. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention in specific circumstances.

[0029] See also Figure 1-6 The present invention provides a technical solution: an on-board charger with an external wake-up function, including an on-board charger body 1, a DC converter 2, and a housing 4. The housing 4 includes a base 401 and a shell 402. A breathable valve 10 is installed on one side of the shell 402. The breathable valve 10 is a one-way valve. A heat-conducting shell 11 is installed inside the shell 402. A temperature sensor is installed inside the heat-conducting shell 11. The temperature sensor is connected to a main control unit 1011. The signal connector 1022 is connected to an external on-board computer.

[0030] The on-board charger body 1 includes a control unit 101, an input / output unit 102, a power unit 103, and a low-voltage auxiliary unit 104. The input / output unit 102 is used to connect to external AC power and output DC power to an external power battery. The power unit 103 includes a power factor correction circuit and a resonant conversion circuit connected thereto. The input end of the power factor correction circuit is connected to the AC input connector 1021, and the output end of the resonant conversion circuit is respectively connected to the input / output connector 1023 and the DC output positive connector 1024. The low-voltage auxiliary unit 104 is used as an auxiliary power supply; the AC input connector 1021, the input / output connector 1023, and the DC output positive connector 1024 are respectively connected to the power unit 103, and the signal connector 1022 is connected to the control unit 101. The signal connector 1022 is installed with an external enable wake-up pin 3;

[0031] The heat dissipation mechanism 9 is connected to the control unit 101. An auxiliary wake-up unit 5 is also installed inside the housing 4, which is used to wake up the control unit 101 to wait for instructions from the external battery management system when the vehicle is not powered or the charging gun is not connected.

[0032] The main control unit 1011 is connected to the external enable wake-up pin 3; in use, when the on-board charger body 1 enters sleep mode or the CP is not connected, a high level is input through the external enable wake-up pin 3 to wake up the main control unit 1011, end the sleep mode, and wait for the external battery management system instruction. The input high level range is 3 to 18V, and the duration is not less than 0.5 seconds. After the high level is canceled, if there is still no AC current input after more than 10 minutes, it will re-enter the sleep mode.

[0033] The auxiliary wake-up module 502 is connected to the control unit 101 and the external enable wake-up pin 3. The communication module 501 is connected to the auxiliary wake-up module 502. The auxiliary wake-up module 502 is connected to the low-voltage auxiliary unit 104 and obtains power through the low-voltage auxiliary unit 104. The communication module 501 can use a Bluetooth module. After receiving the signal, the communication module 501 sends a signal to the auxiliary wake-up module 502. After receiving the signal, the auxiliary wake-up module 502 sends a level signal to the main control unit 1011 through the P0 pin to wake up the main control unit 1011. A pull-up resistor can be connected to the P0 pin to ensure a high-level output. In this way, the user can remotely wake up the main control unit 1011 through the control terminal connected to the communication module 501. The main control unit 1011 establishes communication with the external BMS to obtain data information of the power battery, such as power level and endurance information, so that the vehicle power information can be obtained through the on-board computer without entering the vehicle.

[0034] The fixing groove 6 in the heat-conducting shell 11 matches the on-board charger body 1 and the DC converter 2. The bottom of the fixing groove 6 is sealed by installing a heat-conducting sheet 7. A plurality of heat dissipation holes are evenly opened in the heat-conducting sheet 7 to ensure heat dissipation. A heat-conducting plate is installed on the upper side of the heat-conducting shell 11, and a flow guide pipe 8 is installed in the through hole of the heat-conducting plate. The middle part of the flow guide pipe 8 is connected to a connection valve. The upper part of the flow guide pipe 8 passes through the shell 402 and extends to the bottom of the cooling fan. The main control unit 1011 can control the opening and closing of the connection valve. The heat-conducting shell 11 in contact with the components in the main control unit 1011 conducts heat out. The heat dissipation holes opened on the heat-conducting sheet 7 facilitate heat dissipation. The heat of the heat-conducting shell 11 is transferred to the shell 402, and the heat is quickly conducted out through the heat sink 901 installed on the surface of the shell 402.

[0035] The diameter of the air outlet opened on the upper part of the shell 402 is smaller than the diameter of the guide tube 8. The upper part of the guide tube 8 is connected to the upper shell surface outside the air outlet. After the cooling fan is started, the hot air on the lower side of the heat conduction plate is extracted, and the air valve 10 opens after the pressure difference on both sides reaches the set value, and the external air enters the interior of the heat conduction shell 11 to realize the exchange of internal and external air. During this process, the connection valve is kept open.

[0036] It should be noted that, in this document, relational terms such as first and second are used solely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprise," "include," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like indicate positions or positional relationships based on those shown in the accompanying drawings, and are intended solely for the purpose of facilitating the description of the present invention and simplifying the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A vehicle charger with an external wake-up function, comprising a vehicle charger body, a DC converter, and a housing, characterized in that: The on-board charger body includes a control unit, an input / output unit, a power unit and a low-voltage auxiliary unit. The input / output unit is used to connect external AC power and output DC power to an external power battery. The power unit is connected to the input / output unit to complete the conversion from AC to high-voltage DC to low-voltage DC. The low-voltage auxiliary unit is used as an auxiliary power supply; the input / output unit includes an AC input connector, a signal connector, an input / output connector and a DC output positive connector. The AC input connector, the input / output connector and the DC output positive connector are respectively connected to the power unit, the signal connector is connected to the control unit, and an external enable wake-up pin is provided in the signal connector; a heat dissipation mechanism is provided on the upper part of the housing, the heat dissipation mechanism is connected to the control unit, and an auxiliary wake-up unit is also provided inside the housing for waking up the control unit to wait for instructions from the external battery management system when the vehicle is not powered on or the charging gun is not connected; The housing comprises a base and an outer shell, and a ventilation valve is provided on one side of the outer shell, and the ventilation valve is a one-way valve; A heat-conducting housing is provided inside the housing, a temperature sensor is provided inside the heat-conducting housing, the temperature sensor is connected to the main control unit, and the signal connector is connected to an external on-board computer; The heat-conducting housing mold is formed with multiple fixing grooves, which match the on-board charger body and DC converter. The bottom of the fixing groove is sealed by providing a heat-conducting sheet. A heat-conducting plate is provided on the upper side of the heat-conducting housing. A through hole is provided in the heat-conducting plate. A flow guide tube is provided in the through hole. A connecting valve is connected to the middle of the flow guide tube. The upper part of the flow guide tube passes through the housing and extends to the bottom of the cooling fan. The connecting valve is a solenoid valve and is connected to the main control unit. A plurality of heat dissipation holes are evenly opened in the heat conducting plate; The heat dissipation mechanism includes a heat dissipation fan and a plurality of heat dissipation fins arranged around the heat dissipation fan, the heat dissipation fins are connected to the surface of the outer shell, and an air outlet cooperating with the heat dissipation fan is opened on the upper part of the outer shell, the diameter of the air outlet is smaller than the diameter of the guide tube, and the upper part of the guide tube is connected to the upper shell surface outside the air outlet.

2. The vehicle-mounted charger with external wake-up function according to claim 1, characterized in that: The control unit includes a main control unit, which is connected to an external enable wake-up pin. After receiving a high-level signal input from the external enable wake-up pin, the main control unit ends the sleep state and waits for an external battery management system instruction.

3. The vehicle-mounted charger with external wake-up function according to claim 1, characterized in that: The auxiliary wake-up unit includes a communication module and an auxiliary wake-up module, the auxiliary wake-up module is connected to the control unit and the external enable wake-up pin, the communication module is connected to the auxiliary wake-up module, and the auxiliary wake-up module is connected to the low-voltage auxiliary unit to obtain power through the low-voltage auxiliary unit; The auxiliary wake-up module includes a single-chip microcomputer, an extended storage module connected to the single-chip microcomputer, and a pull-up resistor.

4. The vehicle-mounted charger with external wake-up function according to claim 1, characterized in that: The input and output connector is an OBC output connector.

5. The vehicle-mounted charger with external wake-up function according to claim 1, characterized in that: The power unit includes a power factor correction circuit and a resonant conversion circuit connected thereto, the input end of the power factor correction circuit is connected to the AC input connector, and the output end of the resonant conversion circuit is respectively connected to the input and output connectors and the DC output positive connector.

6. The vehicle-mounted charger with external wake-up function according to claim 1, characterized in that: The input / output connector is a DC input connector, and the input / output connector is connected to a resonant conversion circuit.

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