Automobile charging switching device
By designing a car charging adapter, the problem of electric vehicle slow charging interfaces being incompatible with fast charging stations was solved, achieving compatibility and convenient charging of fast charging functions and improving the charging experience of electric vehicles.
Patent Information
- Application Number
- CN202520001913.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-02
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2035-01-02
AI Technical Summary
Current electric vehicles are only equipped with slow charging interfaces, which cannot be adapted to existing fast charging stations, thus limiting the convenience of using the vehicles.
Design an automotive charging adapter device, comprising a fast charging adapter controller and an AC/DC fast charging controller, which converts the voltage and current of the DC charging gun into fast charging voltage and current that can be input to the slow charging port of the electric vehicle, and realizes electrical connection and signal transmission between the slow charging port of the electric vehicle and the fast charging pile, including a high-voltage contactor and an induction module to ensure safety and compatibility.
It achieves compatibility between the slow charging interface of electric vehicles and fast charging piles, improves the convenience and safety of charging, and retains the original slow charging function while adding fast charging capability.
Smart Images
Figure CN223812498U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to electric automobile charging device technical field especially relates to a car charging adapter. BACKGROUND
[0002] In the current society, cars have become people's commonly used transportation tools. How to solve the contradiction between the growth of the number of cars and energy crisis, environmental protection has become one of the major issues. New energy vehicles (mainly pure electric vehicles and hybrid electric vehicles) because of its energy saving and environmental protection and relatively mature technology, is the important direction of development in the next few years. When the power battery of electric vehicle is reduced to a certain extent, the battery needs to be charged. The car is provided with a charging port, and the external charging connection equipment is needed to connect the car charging port with the external power supply, and the external charging connection equipment mainly has a charging gun and its attached wire harness. After connecting the charging gun with the car charging port and connecting the power line with the external power supply, charging can be realized.
[0003] However, for electric vehicles, only equipped with slow charging interface, with the development of new energy industry, the market slow charging piles are less and less, which leads to less electric vehicle compatible charging piles, and cannot be adapted to the existing fast charging pile to realize fast charging function, affecting the convenience of car owners. INVENTION CONTENTS
[0004] The utility model aims at overcoming the insufficient of prior art, provides a kind of car charging adapter to solve the technical problem that the slow charging of existing electric vehicle cannot be adapted to the fast pile widely laid at present.
[0005] To achieve the above object, the utility model adopts the following technical scheme:
[0006] The embodiment of the utility model provides a kind of car charging adapter, it includes: fast charging adapter controller, the input port of external direct current charging gun is equipped on the fast charging adapter controller, and the output port of external electric automobile slow charging port, the fast charging adapter controller is used to convert the voltage and current of the direct current charging gun into the fast charging voltage and current that can be input from the electric automobile slow charging port.
[0007] Wherein, the input end port includes DC+ port and DC- port, the output port includes L2 end and L3 end, the DC+ port and DC- port are electrically connected to the DC+ port and DC- port on the direct current charging gun respectively, and the L2 end and L3 end are electrically connected to the L2 end and L3 end of the electric automobile slow charging port respectively.
[0008] The fast charging adapter controller further comprises a nine-hole fast charging gun interface terminal and a seven-hole alternating current slow charging terminal; the S+ end of the nine-hole fast charging gun interface terminal is electrically connected to the CC end of the seven-hole alternating current slow charging terminal, the S- end of the nine-hole fast charging gun interface terminal is electrically connected to the CP end of the seven-hole alternating current slow charging terminal, the CC1 end of the nine-hole fast charging gun interface terminal is electrically connected to the PE end of the seven-hole alternating current slow charging terminal in series connection with a resistor, the PE end of the nine-hole fast charging gun interface terminal is electrically connected to the PE end of the seven-hole alternating current slow charging terminal, the DC+ end of the nine-hole fast charging gun interface terminal is electrically connected to the L2 end of the seven-hole alternating current slow charging terminal, and the DC- end of the nine-hole fast charging gun interface terminal is electrically connected to the L3 end of the seven-hole alternating current slow charging terminal.
[0009] Or, the S+ end of the nine-hole fast charging gun interface terminal is electrically connected to the CP end of the seven-hole alternating current slow charging terminal, the S- end of the nine-hole fast charging gun interface terminal is electrically connected to the CC end of the seven-hole alternating current slow charging terminal, the CC1 end of the nine-hole fast charging gun interface terminal is electrically connected to the PE end of the seven-hole alternating current slow charging terminal in series connection with a resistor, the PE end of the nine-hole fast charging gun interface terminal is electrically connected to the PE end of the seven-hole alternating current slow charging terminal, the DC+ end of the nine-hole fast charging gun interface terminal is electrically connected to the L3 end of the seven-hole alternating current slow charging terminal, and the DC- end of the nine-hole fast charging gun interface terminal is electrically connected to the L2 end of the seven-hole alternating current slow charging terminal.
[0010] The automobile charging adapter further comprises an alternating current and direct current fast charging controller electrically connected to the electric automobile slow charging port, the output end of the alternating current and direct current fast charging controller is connected in parallel to the high-voltage wire harness of the motor controller and the power distribution assembly, and the output end of the power distribution assembly is electrically connected to the battery pack of the electric automobile to charge the battery pack.
[0011] The L2 end and the L3 end of the electric automobile slow charging port are respectively connected in series with a high-voltage contactor S1 and a high-voltage contactor S2 between the motor controller, and the high-voltage contactor S1 and the high-voltage contactor S2 are closed when the alternating current and direct current fast charging controller meets the charging condition according to the electric automobile, the fast charging pile and the control machine logic.
[0012] The alternating current and direct current fast charging controller comprises an MCU control module, a high-voltage contactor control module and a low-voltage relay switching control module electrically connected to the MCU control module, the high-voltage contactor control module is used for controlling the high-voltage contactor S1 and the high-voltage contactor S2, and the low-voltage relay switching module is used for switching the control signal path of fast charging or slow charging.
[0013] The inductive module is used for detecting the electric connection signal controlled by the fast charging adapter and transmitting the detection signal to the input detection module, and the inductive module is used for detecting whether the fast charging adapter controller is connected with the slow charging port of the electric vehicle.
[0014] The inductive module comprises a wired magnetic force sensor or a radio frequency receiving and transmitting sensor.
[0015] At least one of the high-voltage contactor S1 and the high-voltage contactor S2 is further connected with a fuse in series.
[0016] The AC / DC fast charging controller further comprises a CAN transceiver module electrically connected to the MCU control module, and the CAN transceiver module is electrically connected to the CAN network of the vehicle-mounted OBC or motor controller of the electric vehicle.
[0017] The automobile charging adapter device of the utility model, through adding charging adapter controller and AC / DC fast charging controller between the fast charging pile and the slow charging interface of the electric vehicle, the function that the slow charging interface of the automobile can be compatible with the fast charging pile and realizes fast charging.
[0018] The above description is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, can be implemented according to the content of the specification, and in order to let the above and other purposes, characteristics and advantages of the utility model can be more obvious and easy to understand, the following preferred embodiments are described in detail as follows. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 It is the fast charging adapter controller and the automobile slow charging interface, external charging pile part structural schematic diagram of the automobile charging adapter device of the utility model embodiment.
[0020] Figure 2 It is the automobile charging adapter device and the internal functional unit circuit schematic diagram of the electric vehicle of the utility model embodiment.
[0021] Figure 3 It is the internal circuit diagram of the fast charging adapter controller of the automobile charging adapter device of the utility model embodiment. DETAILED DESCRIPTION
[0022] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further described in detail below in combination with the drawings and specific implementation.
[0023] Clearly and completely describe the technical scheme in the embodiments of the utility model with the drawings in the embodiments of the utility model, obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative efforts belong to the scope of protection of the utility model.
[0024] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are the orientation or positional relationship described based on the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.
[0025] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.
[0026] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For the person skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation.
[0027] In the utility model, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0028] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0029] In the current society, cars have become a common means of transportation for people. How to solve the contradiction between the increase in the number of cars and energy crisis, environmental protection has become one of the major issues. New energy vehicles (mainly pure electric vehicles and hybrid vehicles) are an important direction for development in the next few years because they are energy-saving and environmentally friendly and relatively mature in technology. When the power battery of an electric vehicle decreases to a certain extent, the battery needs to be charged. The car is provided with a charging port, which needs to be connected to an external charging connection device to connect the car charging port to an external power source, and the external charging connection device mainly includes a charging gun and its attached wire harness. After connecting the charging gun with the car charging port and connecting the power cord with the external power source, charging can be realized. However, for some electric vehicles on the market, most of them are only equipped with slow charging interfaces. With the development of the new energy industry, there are fewer and fewer slow charging piles on the market, which leads to fewer electric vehicles that can be adapted to charging piles and the inability to adapt to existing fast charging piles to achieve fast charging function, affecting the convenience of car owners. In order to solve the above problems, the embodiment discloses a car charging adapter to realize the compatibility between slow charging interface and fast charging pile.
[0030] Please refer to Figures 1 to 2 In this embodiment, the embodiment discloses a car charging adapter, which comprises: a fast charging adapter controller, the fast charging adapter controller is provided with an input port of an external direct current charging gun, and an output port of an external electric vehicle slow charging port, the fast charging adapter controller is used to convert the voltage and current of the direct current charging gun into fast charging voltage and current that can be input from the electric vehicle slow charging port.
[0031] The electric vehicle slow charging port, the on-board OBC, the power distribution assembly, the motor controller and the battery pack shown in the figure are all existing components of the existing electric vehicle.
[0032] The input port includes a DC+ port and a DC- port, and the output port includes an L2 end and an L3 end. The DC+ port and the DC- port are respectively electrically connected to the DC+ port and the DC- port on the direct current charging gun. The L2 end and the L3 end are respectively electrically connected to the L2 end and the L3 end of the electric vehicle slow charging port.
[0033] Please refer toFigure 3 The fast charging adapter controller further comprises a nine-hole fast charging gun interface terminal and a seven-hole alternating current slow charging terminal; the S+ end of the nine-hole fast charging gun interface terminal is electrically connected to the CC end of the seven-hole alternating current slow charging terminal, the S- end of the nine-hole fast charging gun interface terminal is electrically connected to the CP end of the seven-hole alternating current slow charging terminal, the CC1 end of the nine-hole fast charging gun interface terminal is electrically connected to the PE end of the seven-hole alternating current slow charging terminal after being connected in series with a resistor, the PE end of the nine-hole fast charging gun interface terminal is electrically connected to the PE end of the seven-hole alternating current slow charging terminal, the DC+ end of the nine-hole fast charging gun interface terminal is electrically connected to the L2 end of the seven-hole alternating current slow charging terminal, and the DC- end of the nine-hole fast charging gun interface terminal is electrically connected to the L3 end of the seven-hole alternating current slow charging terminal.
[0034] Alternatively, the S+ end of the nine-hole fast charging gun interface terminal is electrically connected to the CP end of the seven-hole alternating current slow charging terminal, the S- end of the nine-hole fast charging gun interface terminal is electrically connected to the CC end of the seven-hole alternating current slow charging terminal, the CC1 end of the nine-hole fast charging gun interface terminal is electrically connected to the PE end of the seven-hole alternating current slow charging terminal after being connected in series with a resistor, the PE end of the nine-hole fast charging gun interface terminal is electrically connected to the PE end of the seven-hole alternating current slow charging terminal, the DC+ end of the nine-hole fast charging gun interface terminal is electrically connected to the L3 end of the seven-hole alternating current slow charging terminal, and the DC- end of the nine-hole fast charging gun interface terminal is electrically connected to the L2 end of the seven-hole alternating current slow charging terminal.
[0035] The new energy electric vehicle fast and slow charging adapter comprises three parts:
[0036] 1. The nine-hole fast charging gun interface terminal is used to connect with the fast charging gun to input the high-voltage direct current and control signals from the fast charging gun end.
[0037] 2. The seven-hole alternating current slow charging gun interface terminal is used to connect with the new energy electric vehicle end alternating current slow charging port to input the high-voltage direct current from the fast charging gun end through the two ports L2 and L3 reserved in the electric vehicle end alternating current slow charging port end, and to communicate the low-voltage signals CC and CP with the vehicle end controller.
[0038] 3. Line switching and circuit control part:
[0039] 1. The direct current high-voltage input DC+ and DC- of the nine-hole fast charging gun interface terminal are switched to the L2 and L3 of the seven-hole alternating current slow charging gun interface terminal, including DC+ and L2, DC- and L3, or DC+ and L3, DC- and L2.
[0040] 2. The nine-hole fast charging gun interface terminal low-voltage communication signals S+ (CAN_H) and S- (CAN_L) are connected to the seven-hole AC slow charging gun interface terminals CC and CP through a line, including S+ and CC, S- and CP, or S+ and CP, S- and CC.
[0041] 3. The nine-hole fast charging gun interface terminal ground PE is connected to the seven-hole AC slow charging gun interface terminal PE, and is connected to the fast / slow charging adapter circuit board ground / PE, the control board and the DC fast charging gun and the electric vehicle share the GND to ensure that the ground connection is good, ensuring the safety of charging.
[0042] 4. According to the vehicle interface connection confirmation in section B.4.2 of the national standard GB / T18487.1-2023, it can be known that the charging equipment end (DC charging pile) judges whether the charging gun and the vehicle interface are completely connected by monitoring point 1 level. After the vehicle interface is completely connected and the electronic lock is locked, S3 and S4 are closed, the low-voltage auxiliary power supply loop is turned on, and the handshaking start stage is entered to start periodical sending of communication handshake messages.
[0043] 5. According to the national standard GB / T18487.1-2023, U1 in the charging equipment end (DC charging pile) is the internal control guide pull-up voltage of the charger, R1 is the internal control guide circuit resistance of the charger, and the resistance R in the circuit part of the adapter controller is pulled down to the ground / PE. After the DC charging gun is inserted into the adapter, the resistance R in the adapter controller is connected to the ground / PE to pull down the voltage of monitoring point 1 to the level (4V) required by the charging pile to consider that the vehicle interface is completely connected, which meets the charging gun and vehicle connection logic of the national standard GB / T18487.1-2023, and then the subsequent DC charging logic can be performed.
[0044] The automobile charging adapter device further comprises an AC / DC fast charging controller electrically connected to the electric vehicle slow charging port, an output end of the AC / DC fast charging controller is connected in parallel to a high-voltage wire harness of a motor controller and a power distribution assembly, and an output end of the power distribution assembly is electrically connected to a battery pack of the electric vehicle to charge the battery pack.
[0045] The L2 end and the L3 end of the electric vehicle slow charging port are respectively connected in series with the high-voltage contactor S1 and the high-voltage contactor S2 between the motor controller, and the high-voltage contactor S1 and the high-voltage contactor S2 are closed when the AC / DC fast charging controller meets the charging conditions according to the electric vehicle, the fast charging pile and the control machine logic.
[0046] At least one of the high-voltage contactor S1 and the high-voltage contactor S2 is further connected in series with a fuse.
[0047] The original vehicle slow charging interface reserves L2, L3 (2nd and 3rd phase AC input) holes, but there is no actual wiring. Two unused holes L2 and L3 are used to install two cables with sufficient current-carrying capacity (as shown by the red lines in the block diagram). One end of the two cables is connected to the slow charging port through an adapter and a DC fast charging gun DC+, DC- to form a high-voltage DC input. The other end of the two cables is connected to the input of two contactors in the AC / DC fast charging controller through a plug. The output of the contactor is connected to the original vehicle motor driver (including the front motor driver or the rear motor driver) through two DC high-voltage input cables in parallel. A high-voltage high-power fuse is integrated on the high-voltage input and output line in the AC / DC fast charging controller. The fuse can be located at any of F1, F2, F3, and F4 in the figure.
[0048] The voltage driver can generate reverse power when the electric vehicle brakes or goes downhill, and convert the reverse power into high-voltage DC power through two high-voltage and high-current cables of the distribution box assembly, and charge the battery pack through the high-voltage distribution box assembly. That is, the original vehicle itself has a high-voltage DC fast charging circuit. By connecting the external DC fast charging gun high-voltage power to the original fast charging circuit in parallel through the related circuit control and safety access, the original vehicle function is not affected, and the fast charging is added to the vehicle.
[0049] The AC / DC fast charging controller includes an MCU control module, a high-voltage contactor control module electrically connected to the MCU control module, and a low-voltage relay switching control module. The high-voltage contactor control module is used to control the high-voltage contactor S1 and the high-voltage contactor S2. The low-voltage relay switching module is used to switch the control signal path of fast charging or slow charging. When the electric vehicle is AC slow charging, the CC and CP of the AC slow charging port need to be connected to the vehicle-mounted OBC for AC slow charging logic control. When the fast charging plug-in adapter is used for fast charging, the CC and CP of the original vehicle slow charging port need to be electrically connected to the MCU CAN module in the fast charging controller box. The low-voltage relay is a single-pole double-throw switch, which is used to switch the CC and CP path during AC slow charging and DC fast charging.
[0050] The electric vehicle slow charging port further comprises an induction module. The induction module is used to detect the electric connection signal controlled by the fast charging adapter and transmit the detection signal to the input detection module. The induction module is used to detect whether the fast charging adapter controller is connected to the electric vehicle slow charging port. The induction module includes a wired magnetic force sensor or a radio frequency receiving and transmitting sensor, such as a Hall sensor (i.e. a magnetic force switch). The radio frequency transmitting module is integrated in the fast charging adapter, and the radio frequency receiving module is integrated in the AC / DC fast charging controller to detect the charging state of the fast charging head.
[0051] The AC / DC fast charging controller is installed in the car (rear trunk or front machine gun), and the Hall sensor is installed on the slow charging port to sense the insertion of the fast charging adapter (the adapter has a magnet). The original slow charging interface is inserted into the AC plug slow charging gun to charge the new energy electric vehicle in AC slow charging mode. The fast charging adapter is inserted into the fast charging gun to realize DC fast charging. It solves the problem that new energy vehicle users cannot find AC slow charging piles and the slow charging time is long. The original slow charging function is retained, and the fast charging function is added by installing the adapter controller to realize fast power supply.
[0052] The AC / DC fast charging controller further comprises a CAN transceiver module electrically connected to the MCU control module, and the CAN transceiver module is electrically connected to the CAN network in the vehicle-mounted OBC or motor controller of the electric vehicle.
[0053] Please refer to Figure 2 The AC / DC fast charging controller takes power from the vehicle-mounted fuse box or vehicle-mounted OBC, and inputs 9-16V power through the TVS surge protection circuit, reverse connection circuit, DC-DC conversion circuit in the controller to output stable 12V to supply power to the Hall sensor and the secondary power supply in the controller. The adapter has a magnet as a sensing source. When the fast charging adapter is inserted, the Hall sensor senses the change of magnetic force and outputs a signal to the AC / DC fast charging controller to turn on the 12V input power of other modules in the control system, and the whole control system starts to work and waits for the gun to scan the code for charging. When the adapter is not inserted, only the Hall sensor is powered by 12V, and the rest of the circuits in the controller are not powered and do not work, thereby minimizing the power consumption of the controller and protecting the small battery from being discharged.
[0054] When the AC / DC fast charging controller does not detect the insertion of the fast charging adapter, the relay 1 and the relay 2 are connected to the CC_OUT and CP_OUT terminals by default, i.e. the CC and CP signals of the original slow charging interface and the CC and CP of the OBC are connected by default. The relay 3 is connected to the NC terminal by default, i.e. it does not control the original CC line. When the AC slow charging gun is inserted, the L1, N, PE, CC, CP and OBC corresponding lines are connected, and the slow charging function of the new energy electric vehicle is completely retained. When DC fast charging is required, the fast charging adapter is inserted,
[0055] The Hall sensor senses the magnetic force change and outputs a signal to the AC / DC fast charging controller, and turns on the 12V input power supply of other modules in the control system. At the same time, the power supply LDO circuit works to output 5V / 3.3V required by the system to other power supplies. The whole control system starts to work. The MCU control module controls the relay 1 and the relay 2 to be closed. The CC_IN and CP_IN are connected to the first CAN module CAN_L and CAN_H in the controller, respectively. The adapter CC and CP are connected to the S+ (i.e. CAN_H) and S- (i.e. CAN_L) in the charging gun. The switching control of the relay 1 and the relay 2 realizes the connection of the CAN transceiver CCAN_H and CAN_L network in the controller and the S+ (i.e. CAN_H) and S- (i.e. CAN_L) in the charging pile. The MCU can establish CAN communication with the charging pile through the physical link. The MCU module controls the relay 3 to be closed to control the CC line in the vehicle-mounted OBC. The CC line is connected to the 2K resistor through the relay and is pulled down (GND / PE), activates the battery, and thus realizes the off-vehicle fast charging. After the battery is activated, the CAN_H and CAN_L of the second CAN transceiver module in the AC / DC fast charging controller are connected to the CAN_H and CAN_L in the vehicle-mounted OBC or the motor controller or the vehicle-mounted OBD interface through the physical wire harness, so that the MCU in the AC / DC fast charging controller can communicate with the original vehicle through CAN, and can obtain the information of the original vehicle battery pack, such as the current voltage value, the SOC percentage, the single cell voltage, the single cell temperature, etc. The integrated radio frequency unit (Bluetooth / wifi module) in the AC / DC fast charging controller can realize wireless transparent transmission and data interaction with mobile devices such as mobile phones / tablets, and can transparently display the above-mentioned information of the original vehicle, such as the current voltage value, the SOC percentage, the single cell voltage, the single cell temperature, etc. to the mobile device end applet / app. The information of the original vehicle battery pack can be clearly and clearly displayed to the user.When the user inserts the fast charging gun, the grounding of the 1K resistor in the adapter control board will pull the CC1 level to the detection level required by the charging pile, the charging pile recognizes the successful insertion of the gun, and waits for code scanning charging; after the user completes the code scanning, the charging pile sends a charging request through the CAN network, the MCU control module in the AC / DC fast charging controller performs handshake with the charging pile through the above-mentioned CAN physical link and the charging pile, and sends the current electric vehicle battery pack related data information and charging voltage and power requirements to the charging pile, the charging pile outputs the corresponding power voltage through the fast charging adapter L2, L3 and the 2 large power cables added in the electric vehicle slow charging interface L2, L3 to the controller, at the same time, the charging pile sends the output voltage and current parameters to the controller MCU through the CAN network, the MCU receives and controls the high-voltage contactor S1 and the high-voltage contactor S2 to charge the electric vehicle, at the same time, the voltage and current information output by the charging pile and the original vehicle voltage value, SOC percentage, single cell voltage, single cell temperature and other information obtained from the second CAN are transmitted to the mobile device end through the radio frequency module, in addition, the MCU controls the charging power according to the obtained current battery pack SOC, battery temperature, single cell voltage and other information (including battery SOC power and power automatic control, battery temperature and power automatic control) and satisfies the end condition (including charging abnormal state automatic identification), automatically stops charging or stops charging through the emergency stop command on the small program, realizes intelligentization and convenience.
[0056] When the end charging condition is met, the MCU in the AC / DC fast charging controller sends a stop charging request to the charging pile through the CAN network to end charging, the MCU receives the feedback that the charging pile has ended charging, and disconnects the high-voltage contactor S1 and the high-voltage contactor S2, at the same time, the MCU controls to disconnect the relay 3, the CC in the vehicle-mounted OBC is disconnected from the ground 2K resistor, so that the electric vehicle battery pack enters the dormant state and is not activated, avoiding the reverse flow of high-voltage cable high-voltage to the controller and the slow charging interface L2, L3 to cause accidental safety accidents, after the user pulls out the charging gun and the adapter, the controller detects that the adapter is pulled out, the sensing signal is disconnected, the whole controller is in a state of no power supply and no work except the Hall sensing, and the charging process is ended.
[0057] The AC / DC fast charging controller feeds back charging control logic each time, and stores charging abnormal information in a local integrated memory; a user can acquire relevant data and upload to a background cloud server through a mobile device and a Bluetooth / WiFi radio frequency module integrated with the AC / DC controller; a developer can acquire the data and optimize and update the program; the optimized program file is uploaded to the cloud server, and the user can download the upgrade file to perform software upgrade on the AC / DC controller, i.e. OTA upgrade; through the OTA upgrade function, compatibility problems caused by upgrade of charging equipment (charging pile) in actual use and use opinion feedback can be fed back to the background server, the problems and opinions are acquired by the background developer, the program is optimized and upgraded by the developer according to the problems and opinions, and the closed loop of OTA upgrade of the controller system on the user side to solve the problems is realized; through continuous optimization and upgrade, the user charging experience can be better improved.
[0058] The automobile charging adapter device of the embodiment can realize the function of fast charging through the compatibility of the slow charging interface of the automobile and the fast charging pile by adding the charging adapter controller and the AC / DC fast charging controller between the fast charging pile and the slow charging interface of the electric automobile.
[0059] The above only further illustrates the technical content of the utility model by way of examples, so that the reader can more easily understand, but does not represent that the embodiments of the utility model are limited to this, any technical extension or re-creation made according to the utility model is also protected by the utility model. The protection scope of the utility model is subject to the claims.
Claims
1. An automobile charging adapter device, characterized by, The application relates to a car charging adapter device. The car charging adapter device comprises a fast charging adapter controller, an input port of which is externally connected with a direct current charging gun, and an output port of which is externally connected with a slow charging port of an electric vehicle, the fast charging adapter controller being used for converting voltage and current of the direct current charging gun into fast charging voltage and current which can be input from the slow charging port of the electric vehicle; the input port comprises a DC+ port and a DC- port, the output port comprises an L2 end and an L3 end, the DC+ port and the DC- port are respectively electrically connected with a DC+ port and a DC- port on the direct current charging gun, and the L2 end and the L3 end are respectively electrically connected with an L2 end and an L3 end of the slow charging port of the electric vehicle; the fast charging adapter controller further comprises a nine-hole fast charging gun interface terminal and a seven-hole alternating current slow charging terminal. The S+ end of the nine-hole fast charging gun interface terminal is electrically connected with the CC end of the seven-hole alternating current slow charging terminal, the S- end of the nine-hole fast charging gun interface terminal is electrically connected with the CP end of the seven-hole alternating current slow charging terminal, the CC1 end of the nine-hole fast charging gun interface terminal is electrically connected with the PE end of the seven-hole alternating current slow charging terminal after being connected with a resistor in series, the PE end of the nine-hole fast charging gun interface terminal is electrically connected with the PE end of the seven-hole alternating current slow charging terminal, the DC+ end of the nine-hole fast charging gun interface terminal is electrically connected with the L2 end of the seven-hole alternating current slow charging terminal, and the DC- end of the nine-hole fast charging gun interface terminal is electrically connected with the L3 end of the seven-hole alternating current slow charging terminal. Or, the S+ end of the nine-hole fast charging gun interface terminal is electrically connected with the CP end of the seven-hole alternating current slow charging terminal, the S- end of the nine-hole fast charging gun interface terminal is electrically connected with the CC end of the seven-hole alternating current slow charging terminal, the CC1 end of the nine-hole fast charging gun interface terminal is electrically connected with the PE end of the seven-hole alternating current slow charging terminal after being connected with a resistor in series, the PE end of the nine-hole fast charging gun interface terminal is electrically connected with the PE end of the seven-hole alternating current slow charging terminal, the DC+ end of the nine-hole fast charging gun interface terminal is electrically connected with the L3 end of the seven-hole alternating current slow charging terminal, and the DC- end of the nine-hole fast charging gun interface terminal is electrically connected with the L2 end of the seven-hole alternating current slow charging terminal.
2. The automobile charging adapter of claim 1, wherein, The car charging adapter device further comprises an alternating current and direct current fast charging controller which is electrically connected with the slow charging port of the electric vehicle, an output end of the alternating current and direct current fast charging controller being connected in parallel to a high-voltage wire harness of a motor controller and a power distribution assembly, and an output end of the power distribution assembly being electrically connected with a battery pack of the electric vehicle so as to charge the battery pack.
3. The automobile charging adapter of claim 2, wherein, The L2 end and the L3 end of the slow charging port of the electric vehicle are respectively connected in series with a high-voltage contactor S1 and a high-voltage contactor S2 between the motor controller, and the high-voltage contactor S1 and the high-voltage contactor S2 are closed when the alternating current and direct current fast charging controller meets charging conditions according to the electric vehicle, a fast charging pile and a control machine logic.
4. The automobile charging adapter of claim 3, wherein, The alternating current and direct current fast charging controller comprises an MCU control module, a high-voltage contactor control module and a low-voltage relay switching control module which are electrically connected with the MCU control module, the high-voltage contactor control module is used for controlling the high-voltage contactor S1 and the high-voltage contactor S2, and the low-voltage relay switching module is used for switching a control signal channel of fast charging or slow charging.
5. The automobile charging adapter of claim 4, wherein, The electric vehicle slow charging port is also provided with an induction module, which is used to detect whether the fast charging adapter controller is connected with the electric vehicle slow charging port.
6. The automobile charging adapter of claim 5, wherein, The induction module includes a wired magnetic force sensor or a radio frequency receiving and transmitting sensor.
7. The automobile charging adapter of claim 3, wherein, At least one of the high-voltage contactor S1 and the high-voltage contactor S2 is further provided with a fuse in series.
8. The automobile charging adapter of claim 4, wherein, The AC / DC fast charging controller further comprises a CAN transceiver module electrically connected to the MCU control module, and the CAN transceiver module is electrically connected to the CAN network of the vehicle-mounted OBC or motor controller of the electric vehicle.