CN220996138U - Portable AC-DC charger for electric automobile - Google Patents
Portable AC-DC charger for electric automobile Download PDFInfo
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- CN220996138U CN220996138U CN202321764800.1U CN202321764800U CN220996138U CN 220996138 U CN220996138 U CN 220996138U CN 202321764800 U CN202321764800 U CN 202321764800U CN 220996138 U CN220996138 U CN 220996138U
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Abstract
The utility model discloses a portable AC-DC charger for an electric automobile, which comprises: an ac plug (1) for connection to a mains ac grid; a control device (2) electrically connected to the alternating current plug (1) through a length of cable (4), and having an AC-DC converter for converting alternating current into direct current and a controller for controlling the opening, closing or magnitude of charging current; a direct current charging connector (3) electrically connected to the control device (2) by another section of cable (4); and the cable (4) has a power transmission line for transmitting a strong current and a signal transmission line for transmitting a weak current. The portable low-power AC-DC charger reduces the design and research difficulty by omitting an AC charging port of an automobile, reduces the cost of the whole automobile, and does not reduce the convenience of a user in the charging process.
Description
Technical Field
The present utility model relates to the field of charging of electric vehicles, and more particularly, to an ac charging device that can be plugged into a Direct Current (DC) charging socket of an electric vehicle.
Background
Current market research indicates that most electric vehicles have two charging ports: one is an Alternating Current (AC) charging port using an AC power source and the other is a Direct Current (DC) charging port using a DC charging power source. This is a combination of dc+ac. A professional charging station provides a direct current charging source through which the vehicle can be charged quickly (for example, for a charging time of about 1 to 2 hours) from direct current. In places without professional charging stations, such as the home, the vehicle is charged through the dc charging port using the ac power supply of the domestic power grid (220V ac power supply in china), which usually takes several tens of hours.
As shown in fig. 1, the electric vehicle of the prior art has an ac charging port and a dc charging port, respectively, corresponding to ac power charging of a civil power grid and professional charging station charging, respectively.
The design of the charging port is often difficult due to layout and packaging reasons.
For an ac charging port, an on-board charger (OBC) needs to be installed in the vehicle, and the on-board charger unit should meet all requirements of the finished vehicle in many respects, such as durability, environment or electromagnetic compatibility (EMC). In addition, the structure of the vehicle-mounted charger is complex, and the hardware circuit of the vehicle-mounted charger can be divided into a main loop and a control circuit. The control circuit completes signal receiving and charging control through a sensor, an ECU, IGBT driving and the like. The main loop circuit may be generally divided into two stages. The front stage is a power factor correction module, which improves the input power factor and suppresses higher harmonics; the latter stage is a DC/DC converter, which meets the requirements of battery charging on current and voltage and realizes electrical isolation. The control circuit collects output current and voltage signals to realize control. These all increase the difficulty of design.
Moreover, the cost of the vehicle may increase significantly due to such a combination of dc+ac.
The portable low-power AC-DC charger is developed for customers, the design and research difficulty can be reduced by omitting an AC charging port of an automobile, the cost of the whole automobile can be reduced, and the convenience of the users in the charging process is not reduced.
The information disclosed in the background section of the utility model is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.
Disclosure of utility model
The utility model aims to provide a portable AC-DC charger for an electric automobile, which can omit an electric and an alternating current charging port thereof, thereby reducing the design and research difficulty, reducing the cost of the whole automobile and not reducing the convenience of users in the charging process.
Specifically, the present utility model provides a portable AC-DC charger for an electric vehicle, comprising:
An ac plug for connection to a mains ac grid;
A control device electrically connected to the alternating current plug through a length of cable, the control device having an AC-DC converter for converting alternating current into direct current and a controller for controlling the turning on, off, or controlling the magnitude of charging current;
A direct current charging connector electrically connected to the control device through another section of cable; and
The cable has a power transmission line for transmitting a strong current and a signal transmission line for transmitting a weak current.
In the portable AC-DC charger for electric vehicles described above, the AC plug may further include a temperature sensor.
In the portable AC-DC charger for an electric vehicle, the control device includes a button for controlling on or off of a power supply, and an indicator for displaying an operating state of the portable AC-DC charger for an electric vehicle, the operating state including a ready state, a charging state, and a fault state. Preferably, the indicator comprises three indicator lights, corresponding to a ready state, a charged state or a fault state, respectively.
In the portable AC-DC charger for an electric vehicle, the control device may include a display screen for displaying an operating state of the portable AC-DC charger for an electric vehicle.
In the portable AC-DC charger for electric vehicles described above, the DC charging connector may further include a release button and a locking device, the locking device is configured to lock connection between the DC charging connector and the DC charging socket of the electric vehicle, and the release button is configured to release locking of connection between the DC charging connector and the DC charging socket of the electric vehicle.
According to the portable low-power AC-DC charger, the AC charging port of an automobile can be omitted, so that the design and research difficulty is reduced, the cost of the whole automobile is reduced, and the convenience of a user in the charging process is not reduced.
The method and apparatus of the present utility model have other features and advantages which will be apparent from or are set forth in detail in the accompanying drawings and the following detailed description, which are incorporated herein, and which together serve to explain certain principles of the present utility model.
Drawings
Fig. 1 shows that an electric vehicle of the prior art can be charged by using an ac charging port and a dc charging port, respectively.
Fig. 2 shows a portable AC-DC charger for an electric vehicle according to the present utility model.
Fig. 3 shows a structural schematic diagram of a portable AC-DC charger for an electric vehicle according to the present utility model.
Fig. 4 is a structural view of an AC plug of a portable AC-DC charger for an electric vehicle according to the present utility model.
Fig. 5A shows a control device of a first embodiment of a portable AC-DC charger for an electric vehicle according to the present utility model.
Fig. 5B shows a control device of a first embodiment of a portable AC-DC charger for an electric vehicle according to the present utility model.
Fig. 6 is a structural view of a direct current charging connector of a portable AC-DC charger for an electric vehicle according to the present utility model.
Fig. 7 is a flowchart of the operation of the portable AC-DC charger for electric vehicles according to the present utility model.
Fig. 8 shows a third embodiment of a portable AC-DC charger for electric vehicles according to the present utility model.
It should be understood that the drawings are not necessarily to scale, illustrating various features of the basic principles of the utility model that may be somewhat simplified. The particular design features of the utility model disclosed herein, including, for example, specific dimensions, orientations, positioning, and configurations, will be determined in part by the particular intended application and use environment.
In the drawings, like numerals refer to the same or equivalent parts of the utility model throughout the several views of the drawings.
Detailed Description
Hereinafter, exemplary embodiments of the present utility model will be described in detail with reference to the accompanying drawings shown. The exemplary embodiments are examples and may be implemented in various forms by those skilled in the art. Thus, the present utility model is not limited to the exemplary embodiments described herein.
Fig. 2 shows a portable AC-DC charger for an electric vehicle according to the present utility model.
As shown in fig. 2, the portable AC-DC charger for an electric vehicle according to the present utility model includes four parts: an ac plug 1, a control device 2, a dc charging connector 3 and a cable 4.
Fig. 3 shows a structural schematic diagram of a portable AC-DC charger for an electric vehicle according to the present utility model.
The ac plug 1 is a plug of an ac power supply of a general civil power grid, and is suitable for a general ac power outlet in a home or public place.
As shown in fig. 3, an ac plug 1 is plugged into a power grid outlet, and power is obtained and input to a control device 2 through a cable 4.
Fig. 4 shows a detail of the ac plug 1, which includes a temperature sensor 11. The temperature sensor 11 may sense the temperature of the line. The temperature signal sensed by the temperature sensor 11 is also input to the control device 2 through the cable 4. That is, the cable 4 includes not only the power transmission line but also the signal transmission line.
The control device 2 comprises an AC-DC converter and a controller. It can convert alternating current into direct current suitable for charging automobiles and can monitor the entire charging process. Specifically, the control device 2 monitors the device temperature, current, and the like, and stops charging when it is determined that a failure has occurred. For example, when the controller determines that the temperature is too high based on the temperature signal received from the ac plug 1, the control device 2 turns off the charging current.
Fig. 5A shows a control device of a first embodiment of a portable AC-DC charger for an electric vehicle according to the present utility model.
As shown in fig. 5A, in the first embodiment, the control device 2 includes a button 21, an indicator 22.
The button 21 is both a power switch and a charging current gear adjustment key. For example, for the push button 21, the power is turned on for the first time, charged with a low gear current (e.g., 8A) for the second time, charged with a high gear current (e.g., 16A) for the third time, and turned off for the fourth time. Alternatively, any element capable of performing the functions of a power switch and a charge current gear adjustment may be substituted for the push button 21. For example, a gear knob switch may be employed instead of the push button 21, and the functions of a power switch and charge current gear adjustment may be performed as well.
The indicator 22 is used to display the operating state of the portable AC-DC charger for electric vehicles. It comprises three indicator lights for indicating a ready state, a charged state or a fault state, respectively. Alternatively, any element capable of displaying the operating state of the portable AC-DC charger may be used as the indicator 22. For example, only one variable color indicator light is used, wherein the first color indicates a ready state and the second color indicates a charged state, and the indicator light is extinguished to indicate a fault state.
By matching the button 21 with the in-vehicle local area network, the charging safety and the charging efficiency are improved.
Fig. 5B shows a control device of a second embodiment of a portable AC-DC charger for an electric vehicle according to the present utility model.
As shown in fig. 5B, in the second embodiment, the control device 2 includes a display screen 23. The display screen 23 is capable of displaying more details than the indicator lamp of the first embodiment, and is not limited to the ready state, the charged state, and the failure state.
The dc charging connector 3 is connected to the control device 2 by a cable 4. As described above, the cable 4 includes not only the power transmission line but also the signal transmission line.
When the direct-current charging connector 3 is connected with a DC charging socket of the automobile, direct-current power from the control device 2 is loaded to a high-voltage storage battery of the automobile; meanwhile, the BMS supplies power to the controller of the control device 2 through the power supply in the vehicle and monitors the charging safety parameters of the high-voltage storage battery. Once the charging safety parameter does not meet the set condition, the BMS will signal the control device 2 to end the charging, and the control device 2 will switch off the charging current. The charge safety parameters include battery voltage and charge current, and may also include the temperature of the high voltage battery.
Fig. 6 shows details of the dc charging connector 3. As shown in fig. 6, the dc charging connector 3 includes a release button 31 and a locking device 32.
When the direct-current charging connector 3 is plugged into the DC charging socket of the automobile, the locking device 32 locks the direct-current charging connector 3 and the DC charging socket of the automobile so as to prevent accidents caused by falling off in the charging process. When the charging process is finished, the charging current of the control device 2 is turned off, the release button 31 is pressed again, and then the direct-current charging connector 3 can be disconnected from the direct-current charging socket of the automobile.
Fig. 7 shows a flowchart of the operation of the portable AC-DC charger for electric vehicles according to the present utility model.
In the case where the ac plug 1 has been connected to the ac power grid, the following steps are sequentially performed, as shown in fig. 7:
Step 100, the DC charging connector 3 is used to charge the DC charging port of the car.
Step 110 checks whether the dc charging connector 3 is connected. If there is no communication, the control device 2 does not display information, and the charging fails. If so, the BMS wakes up, and proceeds to step 120.
Step 120, it is determined whether an in-vehicle local area network (CAN) successfully communicates with the BMS. If no communication is possible, a fault is displayed. If the communication is successful, step 130 is entered.
Step 130, determining whether the locking device 32 is actuated to successfully lock. If not, a fault is displayed. If the lock is successful, step 140 is entered.
Step 140, selecting charging power and starting charging. Step 150 is then entered.
Step 150, determining whether a fault, such as an over-high temperature or an over-high charging current condition, has occurred. If an error occurs, a fault is displayed. If no error has occurred, step 160 is entered.
In step 160, the controller of the control device 2 determines whether the user provides a request to terminate charging. If a request to terminate charging occurs, step 180 is entered. If no request to terminate charging has occurred, step 170 is entered.
Step 180, the locking means is released and the charging is then ended.
Step 170, determining whether the battery power reaches 100%. If the battery level reaches 100%, step 180 is entered, the locking device is released, and charging is terminated. If the battery level has not reached 100%, then the process returns to step 150 to determine if a fault has occurred.
In summary, the operation of the portable AC-DC charger for electric vehicles according to the present utility model is summarized as follows:
1) When the dc charger is connected to a vehicle outlet (vehicle outlet), the CC terminal will operate and the BMS will wake up if it is normally connected to the vehicle. If the connection is abnormal, the direct current charger does not display information, and the charging process fails.
2) After the BMS wakes up, the locking device acts to lock, so that the safety of the charging process is ensured
3) Charging starts and will be done in power mode according to the customer's choice.
4) During charging, if a controller error occurs, such as high temperature (plug or cable controller)/overload/possible failure, the controller will enter a failure state. Otherwise, the charging process will continue.
5) If the user stops charging in the charging process, the locking device acts and the charging is finished; if not, the charging process will continue until the battery is fully charged.
The entire charging process will be monitored by the BMS and the cable controller. And a temperature sensor located in the plug will also play an important role in the charging process.
In addition, fig. 8 shows a third embodiment of a portable AC-DC charger for electric vehicles according to the present utility model, wherein an on-board control system and BMS can communicate with a vehicle charging APP on a cell phone. Through car APP that charges, can control BMS on the cell-phone, and then control device 2 to switch on or off the charge current or select the charge power. The charging process can be checked by a mobile phone; if the battery is fully charged, a message is sent through a short message or APP. And many other functions may be implemented.
The car charging APP may replace the button 21, the indicator 22 in the first embodiment, and the display screen 23 in the second embodiment. Of course, the car charging APP may also exist simultaneously with the button 21 and the indicator 22 in the first embodiment, or may also exist simultaneously with the display screen 23 in the second embodiment.
The foregoing descriptions of specific exemplary embodiments of the present utility model are presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the utility model to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the utility model and its practical application to thereby enable others skilled in the art to make and utilize the utility model in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the utility model be defined by the following claims and their equivalents.
Claims (5)
1. A portable AC-DC charger for an electric vehicle, comprising:
an ac plug (1) for connection to a mains ac grid;
A control device (2) electrically connected to the alternating current plug (1) through a length of cable (4), and having an AC-DC converter for converting alternating current into direct current and a controller for controlling the opening, closing or magnitude of charging current;
A direct current charging connector (3) electrically connected to the control device (2) by another section of cable (4); and
-Said cable (4) having a power transmission line for transmitting a strong current and a signal transmission line for transmitting a weak current;
The control device (2) comprises a button (21) and an indicator (22), wherein the button (21) is used for controlling the on or off of a power supply, and the indicator (22) is used for displaying the working state of the portable AC-DC charger for the electric automobile, and the working state comprises a ready state, a charging state and a fault state.
2. Portable AC-DC charger for electric vehicles according to claim 1, characterized in that the AC plug (1) further comprises a temperature sensor (11).
3. Portable AC-DC charger for electric vehicles according to claim 1, characterized in that the indicator (22) comprises three indicator lights, corresponding to a ready state, a charged state or a fault state, respectively.
4. The portable AC-DC charger for electric vehicles according to claim 1, characterized in that the control device (2) comprises a display screen (23), the display screen (23) being adapted to display the operating state of the portable AC-DC charger for electric vehicles.
5. Portable AC-DC charger for electric vehicles according to claim 1, characterized in that the direct current charging connector (3) comprises a release button (31) and a locking device (32), the locking device (32) being used for locking the connection of the direct current charging connector (3) with the DC charging socket of the electric vehicle, the release button (31) being used for releasing the locking of the connection between the direct current charging connector (3) and the DC charging socket of the electric vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321764800.1U CN220996138U (en) | 2023-07-06 | 2023-07-06 | Portable AC-DC charger for electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321764800.1U CN220996138U (en) | 2023-07-06 | 2023-07-06 | Portable AC-DC charger for electric automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220996138U true CN220996138U (en) | 2024-05-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321764800.1U Active CN220996138U (en) | 2023-07-06 | 2023-07-06 | Portable AC-DC charger for electric automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220996138U (en) |
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2023
- 2023-07-06 CN CN202321764800.1U patent/CN220996138U/en active Active
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