CN210502288U - Low-voltage power supply system of electric vehicle and electric vehicle thereof - Google Patents
Low-voltage power supply system of electric vehicle and electric vehicle thereof Download PDFInfo
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- CN210502288U CN210502288U CN201920987388.7U CN201920987388U CN210502288U CN 210502288 U CN210502288 U CN 210502288U CN 201920987388 U CN201920987388 U CN 201920987388U CN 210502288 U CN210502288 U CN 210502288U
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Abstract
The utility model discloses an electric vehicle's low pressure power supply system and electric vehicle, wherein electric vehicle's low pressure power supply system includes: the vehicle-mounted low-voltage power supply, the distributing board and the high-voltage to low-voltage converting board are sequentially connected; distributing a power supply with a first preset voltage provided by a vehicle-mounted low-voltage power supply to a control unit in a high-voltage power distribution cabinet through a distribution board so as to control a relay after the control unit is electrified, detecting the voltage of the power supply input to the distribution board through a voltage detection circuit on a high-voltage to low-voltage board, starting the high-voltage to low-voltage board to work when the voltage of the power supply is less than a second preset voltage so as to convert the high-voltage power provided by the vehicle-mounted high-voltage power supply into low-voltage power with a third preset voltage, and providing the low-voltage power with the third preset voltage to the control unit so as to maintain the power supply preset time for the control unit; therefore, potential safety hazards caused by the running process of the vehicle are avoided, and the service life of internal components such as relays is prolonged.
Description
Technical Field
The utility model relates to the technical field of vehicles, in particular to electric vehicle's low pressure power supply system and an electric vehicle who has this low pressure power supply system.
Background
In the correlation technique, if the low voltage power supply in the electric vehicle is suddenly interrupted, and the electric vehicle is under the condition that the power is not allowed to be cut off at the moment, the electric vehicle is easily caused to be cut off abnormally, so that certain potential safety hazards exist in the driving process of the vehicle, and the relay is automatically disconnected because the active discharge is not completed, so that the service life of internal components such as the relay is shortened because of the impact of large current, and the stability of the whole vehicle is influenced.
SUMMERY OF THE UTILITY MODEL
The present invention aims at solving at least one of the technical problems in the above-mentioned technology to a certain extent. Therefore, an object of the utility model is to provide an electric vehicle's low pressure power supply system, through set up voltage detection circuit in order to detect mains voltage on the low clamp plate is changeed to the high pressure to judge whether need start high pressure change low clamp plate according to testing result, in order to ensure to provide the low voltage power who predetermines the time, avoid the vehicle potential safety hazard that the in-process brought of traveling, improved the life of inside components and parts such as relay simultaneously greatly.
A second object of the present invention is to provide an electric vehicle.
To achieve the above object, the present invention provides in a first aspect a low voltage power supply system for an electric vehicle, including: the vehicle-mounted low-voltage power supply is used for providing a power supply of a first preset voltage; the first input end of the distribution board is connected with the vehicle-mounted low-voltage power supply, and the output end of the distribution board is connected to the high-voltage power distribution cabinet, wherein the high-voltage power distribution cabinet comprises a control unit and a plurality of power supply output ends, each power supply output end is connected to a corresponding high-voltage power receiving device through a relay to form a high-voltage power supply loop, and the distribution board distributes the power supply with the first preset voltage to the control unit so as to control the relay after the control unit is powered on; the high-voltage-to-low-voltage switch comprises a high-voltage-to-low-voltage plate, wherein the input end of the high-voltage-to-low-voltage plate is connected to a vehicle-mounted high-voltage power supply, the low-voltage output end of the high-voltage-to-low-voltage plate is connected with the second input end of a distributing plate, a voltage detection circuit is arranged on the high-voltage-to-low-voltage plate and connected with the distributing plate to detect and input the voltage of the power supply of the distributing plate, the high-voltage-to-low-voltage plate is started to work when the voltage of the power supply is smaller than the second preset voltage, so that the high voltage provided by the vehicle-mounted high-voltage power supply is converted into the low voltage of the third preset voltage, and the low voltage of the third preset voltage.
According to the utility model provides an electric vehicle's low voltage power supply system, the power supply of the first preset voltage that provides vehicle-mounted low voltage power supply distributes the control unit in the high voltage distribution cabinet through the nozzle plate, so that control unit controls the relay after the electricity, and change the voltage detection circuit on the low pressure board through the high pressure and detect the power supply voltage who inputs the nozzle plate, start high pressure when power supply voltage is less than the second preset voltage and change low pressure board into work, change the high pressure electricity that vehicle-mounted high voltage power supply provided into the low pressure electricity of third preset voltage, and provide the low pressure electricity of third preset voltage for the control unit, so that maintain the power supply preset time to the control unit; therefore, potential safety hazards caused by the running process of the vehicle are avoided, and the service life of internal components such as relays is greatly prolonged.
In addition, according to the present invention, the low voltage power supply system for electric vehicle can further have the following additional technical features:
optionally, an indicating device is further arranged on the high-voltage-to-low-voltage pressing plate, wherein the indicating device is controlled to send out prompt information that the vehicle-mounted low-voltage power supply is normal when the voltage of the power supply is greater than or equal to a second preset voltage by the high-voltage-to-low-voltage pressing plate.
Optionally, the indicating device is an LED lamp.
Optionally, the first preset voltage is 24V, the second preset voltage is 18V, the third preset voltage is 21V, and the preset time is 60S.
Optionally, the actuation time of the high-pressure to low-pressure platen is in the order of nanoseconds.
In order to achieve the above object, the second aspect of the present invention provides an electric vehicle including the above low voltage power supply system of the electric vehicle.
According to the utility model provides an electric vehicle, through foretell electric vehicle's low pressure power supply system, can start high pressure and change low clamp plate when low voltage power supply breaks down suddenly to provide the low voltage power supply of presetting time, avoid the potential safety hazard that the vehicle brought in the process of traveling, improved the life of inside components and parts such as relay simultaneously greatly.
Drawings
Fig. 1 is a block schematic diagram of a low voltage power supply system of an electric vehicle according to an embodiment of the present invention;
fig. 2 is a block schematic diagram of an electric vehicle according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of a method for preventing a relay control power supply from falling in a low-voltage power supply system of an electric vehicle according to an embodiment of the present invention.
Fig. 4 is a schematic flow chart of a method for preventing a relay control power supply from falling in a low-voltage power supply system of an electric vehicle according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In order to better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
Referring to fig. 1, a low voltage power supply system of an electric vehicle according to an embodiment of the present invention includes an on-board low voltage power supply 101, a distribution board 102, and a high voltage to low voltage board 105.
The vehicle-mounted low-voltage power supply 101 is used for providing a power supply of a first preset voltage.
As an embodiment, the first preset voltage is 24V.
The first input end of the distribution board 102 is connected to the vehicle-mounted low-voltage power supply 101, and the output end of the distribution board 102 is connected to the high-voltage power distribution cabinet 103, where the high-voltage power distribution cabinet 103 includes a control unit 1031 and a plurality of power supply output ends, each power supply output end is connected to a corresponding high-voltage powered device through a relay 104 to form a high-voltage power supply loop, and the distribution board 102 distributes the power supply with a first preset voltage to the control unit 1031, so that the control unit 1031 controls the relay 104 after being powered on.
In addition, as an embodiment, when the first input terminal of the distribution board 102 is connected to the vehicle-mounted low-voltage power supply 101, the first input terminal is connected to the vehicle-mounted low-voltage power supply 101 through two power lines, so that the safe transmission of the vehicle-mounted low-voltage power supply 101 is improved.
That is to say, the on-vehicle low-voltage power supply 101 transmits the first preset voltage to the distribution board 102, the distribution board distributes the power supply of the first preset voltage to the control unit 1031 in the high-voltage distribution cabinet 103, and the relay 104 is controlled after the control unit 1031 is powered on.
The input end of the high-voltage to low-voltage conversion plate 105 is connected to the vehicle-mounted high-voltage power supply 106, the low-voltage output end of the high-voltage to low-voltage conversion plate 105 is connected to the second input end of the distribution plate 102, a voltage detection circuit 1051 is arranged on the high-voltage to low-voltage conversion plate 105, the voltage detection circuit 1051 is connected to the distribution plate 102 to detect the voltage of the power supply input to the distribution plate, and the high-voltage to low-voltage conversion plate 105 is started to work when the voltage of the power supply is smaller than a second preset voltage, so that the high-voltage power provided by the vehicle-mounted high-voltage power supply 106 is converted into low-voltage power of a third preset voltage, and the low-voltage power of the third preset voltage is provided to the control unit.
As an embodiment, the indicating device is an LED lamp.
In an embodiment, the second preset voltage is 18V, the third preset voltage is 21V, and the preset time is 60S.
That is, the input terminal of the high-voltage to low-voltage board 105 is connected to the vehicle-mounted high-voltage power supply 106, the output terminal is connected to the second input terminal of the distribution board 102, the voltage detection circuit 1051 is disposed on the high-voltage to low-voltage board 105, the voltage detection circuit 1051 is connected to the distribution board 102 to detect the power supply voltage input to the distribution board, when the power supply voltage is detected to be less than 18V, the high-voltage to low-voltage board 105 is activated to operate, so as to convert the high-voltage power provided by the vehicle-mounted high-voltage power supply 106 into the low-voltage power of 21V, and provide the low-voltage power of 21V to the control unit 1031, so as to maintain the power supply 60S to the.
It should be noted that when the power supply voltage is detected to be 18V or more, the high-voltage to low-voltage board 105 does not start operation.
As shown in fig. 1, as an embodiment, an indicating device 1052 is further disposed on the high-voltage to low-voltage plate 105, wherein when the power supply voltage is greater than or equal to a second preset voltage, the high-voltage to low-voltage plate 105 controls the indicating device 1052 to send out a prompt that the vehicle-mounted low-voltage power supply 101 is normal.
It should be noted that the indicating device may be an LED lamp.
That is, the LED lamp is controlled to be turned on when the power supply voltage is equal to or higher than the second preset voltage, so that a prompt message that the vehicle-mounted low-voltage power supply 101 is normal is given.
As an embodiment, when the power supply voltage is lower than the second preset voltage, the high-voltage to low-voltage board 105 controls the LED lamp not to be turned on, so as to give an indication that the vehicle-mounted low-voltage power supply 101 is abnormal.
As an example, the actuation time of the high-to-low platen 105 is in the order of nanoseconds.
Since the high-voltage to low-voltage board 105 is activated for a nanosecond level, the relay is not instantaneously turned off when the low-voltage power supply is suddenly interrupted.
In summary, in the embodiment of the present invention, the power supply of the first preset voltage provided by the vehicle-mounted low voltage power supply is distributed to the control unit in the high voltage distribution cabinet through the distribution board, so that the control unit controls the relay after being powered on, and the voltage detection circuit on the high voltage-to-low voltage board detects the power supply voltage input to the distribution board, when the power supply voltage is smaller than the second preset voltage, the high voltage-to-low voltage board is started to work, so as to convert the high voltage provided by the vehicle-mounted high voltage power supply into the low voltage of the third preset voltage, and provide the low voltage of the third preset voltage to the control unit, so as to maintain the power supply preset time for the control unit; therefore, potential safety hazards caused by the running process of the vehicle are avoided, and the service life of internal components such as relays is greatly prolonged.
In addition, as shown in fig. 2, an embodiment of the present invention further provides an electric vehicle 2000, which includes the low-voltage power supply system 1000 of the electric vehicle.
According to the utility model discloses electric vehicle, through foretell electric vehicle's low pressure power supply system, can start high pressure and change low clamp plate when low voltage power supply breaks off suddenly to provide the low voltage power supply of presetting time, avoid the potential safety hazard that the vehicle brought in the driving process, improved the life of inside components and parts such as relay simultaneously greatly.
In addition, as shown in fig. 3, the embodiment of the present invention further provides a method for preventing a relay control power supply from falling in a low voltage power supply system of an electric vehicle, wherein the low voltage power supply system of the electric vehicle includes an on-vehicle low voltage power supply 101, a distribution board 102 and a high voltage to low voltage board 105, the on-vehicle low voltage power supply 101 is used for providing a power supply of a first preset voltage, a first input end of the distribution board 102 is connected to the on-vehicle low voltage power supply 101, an output end of the distribution board 102 is connected to a high voltage distribution cabinet 103, the high voltage distribution cabinet 103 includes a control unit 1031 and a plurality of power supply output ends, each power supply output end is connected to a corresponding high voltage powered device through a relay 104 to form a high voltage power supply loop, the distribution board 102 distributes the power supply of the first preset voltage to the control unit 1031, so as to control the relay 104 after the control unit 1031 is powered on, an input end, the low voltage output terminal of the high voltage to low voltage board 105 is connected to the second input terminal of the distribution board 102, and the method includes the following steps:
And 102, judging whether the voltage of the power supply is less than a second preset voltage.
And 103, if the voltage of the power supply is smaller than the second preset voltage, the high-voltage-to-low voltage board starts to work so as to convert the high voltage provided by the vehicle-mounted high-voltage power supply into low voltage of a third preset voltage, and the low voltage of the third preset voltage is provided to the control unit, so that the control unit is maintained to be powered for preset time.
Further, still be equipped with indicating device on the low clamp plate is changeed to high pressure, wherein, when power supply voltage more than or equal to the second preset voltage, high pressure changes low clamp plate control indicating device and sends the normal suggestion information of on-vehicle low voltage power supply.
As an embodiment, the first preset voltage is 24V, the second preset voltage is 18V, the third preset voltage is 21V, and the preset time is 60S.
As one embodiment, the start time of the high-voltage-to-low pressure plate is in the order of nanoseconds.
It should be noted that the foregoing description of the low-voltage power supply system of the electric vehicle is also applicable to the method for preventing the relay control power supply from dropping in the low-voltage power supply system of the electric vehicle of the present embodiment, and is not repeated herein.
According to the utility model provides a method for preventing relay control power supply from falling in electric vehicle's low pressure power supply system, through detecting the power supply voltage who inputs the separated time board, thereby judge whether power supply voltage is less than second preset voltage, if power supply voltage is less than second preset voltage, high pressure changes low pressure board then start and carry out work, convert the high tension electricity that on-vehicle high tension power supply provided into the low tension electricity of third preset voltage, and provide the low tension electricity of third preset voltage for the control unit, so that maintain the power supply preset time to the control unit; therefore, potential safety hazards caused by the running process of the vehicle are avoided, and the service life of internal components such as relays is greatly prolonged.
In addition, fig. 4 is a schematic flowchart of a method for preventing a relay control power supply from falling in a low-voltage power supply system of an electric vehicle according to an embodiment of the present invention.
As shown in fig. 4, the method comprises the steps of:
in step 201, the voltage detection circuit detects whether the voltage is less than 18V. If yes, go to step 202; if not, step 203 is performed.
In step 202, the LED lamp is not turned on, and the high-voltage to low-voltage board works at the same time, and the power supply time of 60S is maintained.
And step 203, the LED lamp is lightened, and the high-voltage to low-voltage board does not work.
That is, as an embodiment, when the voltage detection circuit on the high-voltage to low-voltage board detects that the voltage is 18V to 24V, the low voltage is determined to be normal, the LED lamp on the high-voltage to low-voltage board is turned on, and the high-voltage to low-voltage board keeps the shutdown state and does not work; when the voltage detection circuit on the high-voltage-to-low-voltage plate detects that the voltage is smaller than 18V, the low voltage is judged to be abnormal, the LED lamp on the high-voltage-to-low-voltage plate is not turned on, meanwhile, the high-voltage-to-low-voltage plate starts to work, the high-voltage-to-low-voltage plate provides a 21V power supply and maintains 60S, and whether the low voltage is recovered to be normal or not is continuously detected during 60S.
It should be noted that the foregoing description of the low-voltage power supply system of the electric vehicle is also applicable to the method for preventing the relay control power supply from dropping in the low-voltage power supply system of the electric vehicle of the present embodiment, and is not repeated herein.
In the description of the present invention, it is to be understood that 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 indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (6)
1. A low-voltage power supply system for an electric vehicle, comprising:
the vehicle-mounted low-voltage power supply is used for providing a power supply of a first preset voltage;
the first input end of the distribution board is connected with the vehicle-mounted low-voltage power supply, and the output end of the distribution board is connected to the high-voltage power distribution cabinet, wherein the high-voltage power distribution cabinet comprises a control unit and a plurality of power supply output ends, each power supply output end is connected to a corresponding high-voltage power receiving device through a relay to form a high-voltage power supply loop, and the distribution board distributes the power supply with the first preset voltage to the control unit so as to control the relay after the control unit is powered on;
the high-voltage-to-low-voltage switch comprises a high-voltage-to-low-voltage plate, wherein the input end of the high-voltage-to-low-voltage plate is connected to a vehicle-mounted high-voltage power supply, the low-voltage output end of the high-voltage-to-low-voltage plate is connected with the second input end of a distributing plate, a voltage detection circuit is arranged on the high-voltage-to-low-voltage plate and connected with the distributing plate to detect and input the voltage of the power supply of the distributing plate, the high-voltage-to-low-voltage plate is started to work when the voltage of the power supply is smaller than the second preset voltage, so that the high voltage provided by the vehicle-mounted high-voltage power supply is converted into the low voltage of the third preset voltage, and the low voltage of the third preset voltage.
2. The low-voltage power supply system of the electric vehicle as claimed in claim 1, wherein an indicating device is further disposed on the high-voltage to low-voltage pressing plate, and when the voltage of the power supply is greater than or equal to a second preset voltage, the high-voltage to low-voltage pressing plate controls the indicating device to send out a prompt message that the vehicle-mounted low-voltage power supply is normal.
3. The low voltage power supply system for electric vehicles according to claim 2, characterized in that said indicating means are LED lamps.
4. The low voltage power supply system of an electric vehicle according to any one of claims 1 to 3, characterized in that said first preset voltage is 24V, said second preset voltage is 18V, said third preset voltage is 21V, and said preset time is 60S.
5. The low voltage power supply system for electric vehicles according to claim 4, wherein the actuation time of said high voltage to low voltage platen is in the order of nanoseconds.
6. An electric vehicle characterized by comprising a low-voltage power supply system of an electric vehicle according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920987388.7U CN210502288U (en) | 2019-06-28 | 2019-06-28 | Low-voltage power supply system of electric vehicle and electric vehicle thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920987388.7U CN210502288U (en) | 2019-06-28 | 2019-06-28 | Low-voltage power supply system of electric vehicle and electric vehicle thereof |
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| Publication Number | Publication Date |
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| CN210502288U true CN210502288U (en) | 2020-05-12 |
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| CN201920987388.7U Active CN210502288U (en) | 2019-06-28 | 2019-06-28 | Low-voltage power supply system of electric vehicle and electric vehicle thereof |
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