CN216670107U - Voltage acquisition device of quick charging equipment and vehicle - Google Patents
Voltage acquisition device of quick charging equipment and vehicle Download PDFInfo
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- CN216670107U CN216670107U CN202122410843.7U CN202122410843U CN216670107U CN 216670107 U CN216670107 U CN 216670107U CN 202122410843 U CN202122410843 U CN 202122410843U CN 216670107 U CN216670107 U CN 216670107U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
Abstract
The application provides a fill voltage acquisition device and vehicle of equipment soon, the device includes: the voltage dividing circuit comprises a first voltage dividing unit, a second voltage dividing unit, a third voltage dividing unit and a fourth voltage dividing unit, wherein the first end of the first voltage dividing unit is electrically connected with a positive electrode of the quick charging equipment, the second end of the first voltage dividing unit is electrically connected with the first end of the second voltage dividing unit, the second end of the second voltage dividing unit and the first end of the third voltage dividing unit are both grounded, the second end of the third voltage dividing unit is electrically connected with the first end of the fourth voltage dividing unit, and the second end of the fourth voltage dividing unit is electrically connected with a negative electrode of the quick charging equipment; the processor comprises a first acquisition port and a second acquisition port, the first acquisition port is electrically connected with the first end of the second voltage division unit, and the second acquisition port is electrically connected with the second end of the third voltage division unit. The device solves the problem that the acquisition device for the voltage at two ends of the quick charging equipment in the prior art is complex in structure.
Description
Technical Field
The application relates to the technical field of electric automobiles, in particular to a voltage acquisition device of quick charging equipment and a vehicle.
Background
Along with the reduction of the electric quantity of the battery pack in normal use, the electric automobile needs to charge the battery pack. The current mainstream charging mode is to use direct current for quick charging. Along with the development of electric motor cars, some enterprises put forward a new demand on quick charging, that is, when a charging gun is connected to a charging port of an electric motor car, a BMS needs to detect a high-voltage state of a quick charging pile before a battery pack establishes a high-voltage connection with the quick charging pile, and a corresponding contactor needs to be closed for charging when the voltage of the quick charging pile is smaller than a set value. The demand can prevent the damage of the self trouble of the quick-charging pile to the electric vehicle and the harm of personnel, and can also prevent the damage of the battery car caused by overlarge pressure difference between the battery pack and the quick-charging pile. Therefore BMS needs to detect the high-pressure state of the quick-charging pile before the high-pressure connection is established between the battery pack and the quick-charging pile, so that the battery pack can perform corresponding actions to ensure the safety of the electric vehicle and personnel, and therefore, it can be seen that the BMS needs to detect the high-pressure state of the quick-charging pile before the high-pressure connection is established between the battery pack and the quick-charging pile, so that the electric vehicle has a novel and very important function.
The existing design is generally to design a single high-pressure area, and the area uses the high-pressure negative pole of the fast-filling pile as a reference point to acquire the high-pressure signal of the fast-filling pile. The existing design of BMS high-voltage signal detection circuit framework is that low-voltage region 12V generally provides the power, converts the required voltage value of voltage acquisition chip into through LDO/SBC, later converts the voltage value of low-voltage region into the voltage value of high-voltage region through keeping apart DCDC, and the high-voltage acquisition chip that corresponds carries out the communication through keeping apart communication chip and MCU after gathering high-voltage information.
As shown in fig. 1, a charging circuit for charging a battery by a quick charging device comprises the battery, a main positive contactor, a main negative contactor, a quick charging positive contactor, a quick charging negative contactor and the quick charging device, wherein a central connecting line of the main positive contactor and the main negative contactor, and a central connecting line of the quick charging positive contactor and the quick charging negative contactor are divided into 3 regions which are respectively a battery PACK region, a whole vehicle region and a quick charging device region, a positive electrode PACK + of the battery is electrically connected with a positive electrode DC + of the quick charging device through the main positive contactor and the quick charging positive contactor, a negative electrode PACK-of the battery is electrically connected with a negative electrode DC-of the quick charging device through the main negative contactor and the quick charging negative contactor, of course, the quick charging device supplies power to an alternating current, the alternating current needs to be converted into a direct current through a converter, the main positive contactor, the main negative contactor, the quick charging positive contactor and the quick charging negative contactor are all closed, the quick charging equipment can charge the battery.
Wherein, two ends of the voltage dividing circuit of the resistor R1 and the resistor R2 are respectively connected with the positive electrode PACK + of the battery and the negative electrode PACK-of the battery, two ends of the voltage dividing circuit of the resistor R3 and the resistor R4 are respectively connected with the LINK + of the main positive contactor which is not connected with the positive electrode of the battery and the LINK-of the main negative contactor which is not connected with the negative electrode of the battery, two ends of the voltage dividing circuit of the resistor R5 and the resistor R6 are respectively connected with the positive electrode DC + of the quick charging device and the negative electrode DC-of the quick charging device, the voltage collecting chip HVIC1 can collect the voltage of two ends of the resistor R2 to calculate and obtain the voltage of two ends of the battery according to the voltage dividing principle, thereby judging whether the working state of the battery is normal, similarly, the voltage collecting chip HVIC1 can collect the voltage of two ends of the resistor R4 to calculate and obtain the voltage dividing voltage of the LINK + and the negative electrode PACK + of the battery of the main positive contactor which is not connected with the positive electrode of the battery according to the voltage dividing principle, therefore, whether the main positive contactor has a fault or not is judged, and therefore the voltage acquisition chip HVIC2 can acquire the voltage at the two ends of the resistor R6 so as to calculate the voltage at the two ends of the quick charging equipment according to the voltage division principle, and the voltage of the quick charging equipment is smaller than a set value.
As shown in fig. 2, the power supply and communication connection diagram of the voltage acquisition chip HVIC1 and the voltage acquisition chip HVIC2 is divided into a low voltage area and a high voltage area, the low voltage area includes a low voltage power supply, a voltage stabilizer and a processor, after the voltage provided by the low voltage power supply passes through the voltage stabilizer, the converter boosts the voltage to supply power to the voltage acquisition chip HVIC1 and the voltage acquisition chip HVIC2, the voltage signals acquired by the voltage acquisition chip HVIC1 and the voltage acquisition chip HVIC2 are sent to the processor through an isolation communication chip, wherein the isolation communication chip is used for converting the low voltage area communication signals into high voltage area communication signals and converting the high voltage area communication signals into low voltage area communication signals.
As can be seen from fig. 1 and 2, there are several problems:
1. the structure is complicated: a separate high-voltage area is needed to collect the voltage at two ends of the quick-charging pile;
2. the PCB area is big: the PCB occupies a large area due to the complex structure, and is not beneficial to the spatial arrangement and installation of the PCB;
3. resource occupation: 1 group of special communication channels of the MCU processor are occupied;
4. poor EMC performance: EMC performance is poor due to high and low voltage conversion of a basic frequency band of the isolated DCDC converter, noise of isolated communication and the like;
5. the cost is high: due to the complex structure, the large area of the PCB, the large size of the shell and the need of special materials, the cost is high.
SUMMERY OF THE UTILITY MODEL
The application mainly aims to provide a voltage acquisition device and a vehicle of quick charging equipment, so as to solve the problem that the structure of the acquisition device of the voltage at two ends of the quick charging equipment in the prior art is complex.
In order to achieve the above object, according to an aspect of the present application, there is provided a voltage collecting device of a quick charging apparatus, including: the voltage dividing circuit comprises a first voltage dividing unit, a second voltage dividing unit, a third voltage dividing unit and a fourth voltage dividing unit, wherein the first end of the first voltage dividing unit is electrically connected with a positive electrode of the quick charging equipment, the second end of the first voltage dividing unit is electrically connected with the first end of the second voltage dividing unit, the second end of the second voltage dividing unit and the first end of the third voltage dividing unit are both grounded, the second end of the third voltage dividing unit is electrically connected with the first end of the fourth voltage dividing unit, and the second end of the fourth voltage dividing unit is electrically connected with a negative electrode of the quick charging equipment; the processor comprises a first acquisition port and a second acquisition port, wherein the first acquisition port is electrically connected with a first end of the second voltage division unit, the second acquisition port is electrically connected with a second end of the third voltage division unit, the first acquisition port is used for acquiring voltage signals between the first voltage division unit and the second voltage division unit, and the second acquisition port is used for acquiring voltage signals between the third voltage division unit and the fourth voltage division unit.
Alternatively, the first voltage dividing unit is formed by a first voltage dividing resistor, the second voltage dividing unit is formed by a second voltage dividing resistor, the third voltage dividing unit is formed by a third voltage dividing resistor, and the fourth voltage dividing unit is formed by a fourth voltage dividing resistor.
Optionally, the voltage divider circuit further includes: and the first switch is positioned on a connecting line between the second end of the first voltage-dividing resistor and the first end of the second voltage-dividing resistor.
Optionally, the voltage divider circuit further includes: and the second switch is positioned on a connecting line between the second end of the third voltage dividing resistor and the first end of the fourth voltage dividing resistor.
Optionally, the first switch is an optocoupler control switch.
Optionally, the second switch is an optocoupler control switch.
Optionally, the processor is configured to control the first switch to be turned on or off.
Optionally, the processor is configured to control the second switch to be turned on or off.
Optionally, the processor is an MCU.
According to another aspect of the application, a vehicle is provided, which comprises a voltage acquisition device of a quick charging device, wherein the voltage acquisition device of the quick charging device is any one of the devices.
By applying the technical scheme of the application, in the voltage acquisition device of the fast charging equipment, the voltage dividing circuit comprises a first voltage dividing resistor, a second voltage dividing resistor, a third voltage dividing resistor and a fourth voltage dividing resistor, wherein a first end of the first voltage dividing resistor is electrically connected with a positive electrode of the fast charging equipment, a second end of the first voltage dividing resistor is electrically connected with a first end of the second voltage dividing resistor, a second end of the second voltage dividing resistor and a first end of the third voltage dividing resistor are both grounded, a second end of the third voltage dividing resistor is electrically connected with a first end of the fourth voltage dividing resistor, and a second end of the fourth voltage dividing resistor is electrically connected with a negative electrode of the fast charging equipment; the processor comprises a first acquisition port and a second acquisition port, wherein the first acquisition port is electrically connected with a first end of the second divider resistor, the second acquisition port is electrically connected with a second end of the third divider resistor, the first acquisition port is used for acquiring a voltage signal between the first divider resistor and the second divider resistor, and the second acquisition port is used for acquiring a voltage signal between the third divider resistor and the fourth divider resistor. The device can obtain the voltage at two ends of a second divider resistor by collecting a voltage signal between the first divider resistor and the second divider resistor, can obtain the voltage at two ends of a third divider resistor by collecting a voltage signal between the third divider resistor and the fourth divider resistor, can obtain the sum of the voltage at two ends of the first divider resistor and the voltage at two ends of the second divider resistor according to the voltage division principle, namely the sum of the voltage at two ends of the third divider resistor and the voltage at two ends of the fourth divider resistor according to the voltage at two ends of the second divider resistor, the resistance of the first divider resistor and the resistance of the second divider resistor, and can obtain the sum of the voltage at two ends of the third divider resistor and the voltage at two ends of the fourth divider resistor according to the voltage at two ends of the third divider resistor, the resistance of the third divider resistor and the resistance of the fourth divider resistor, and can obtain the sum of the second divider, wherein the voltage at two ends of the quick-charging equipment is the sum of the first divider and the second divider, compared with the prior art that voltage signals are acquired through the voltage acquisition chip and need to be sent to the processor through the isolation communication chip, the structure of the voltage acquisition device is simplified, and the problem that the acquisition device of the voltages at two ends of the quick charging equipment in the prior art is complex in structure is solved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
fig. 1 shows a schematic diagram of a voltage acquisition device of a quick charging device in the prior art;
FIG. 2 shows a schematic diagram of the communication connections of a prior art voltage acquisition chip;
fig. 3 shows a schematic diagram of a voltage acquisition device of a fast charging apparatus according to an embodiment of the present application;
FIG. 4 shows a schematic diagram of the communication connections of a voltage acquisition chip according to an embodiment of the present application.
Wherein the figures include the following reference numerals:
01. a battery; 02. a primary positive contactor; 03. a main negative contactor; 04. a fast charging positive contactor; 05. a quick charging negative contactor; 06. a fast charging device; 10. a voltage dividing circuit; 11. a first voltage division unit; 12. a second voltage division unit; 13. a third partial pressure unit; 14. a fourth voltage division unit; 20. a processor; 21. a first acquisition port; 22. a second acquisition port.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Also, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.
As described in the background art, the structure of the voltage acquisition device at two ends of the rapid charging device in the prior art is complex, and in order to solve the problem, the application provides a voltage acquisition device of the rapid charging device and a vehicle.
According to an embodiment of the present application, there is provided a voltage collecting device of a fast charging apparatus, as shown in fig. 3, the device includes:
a voltage dividing circuit 10, including a first voltage dividing unit 11, a second voltage dividing unit 12, a third voltage dividing unit 13 and a fourth voltage dividing unit 14, wherein a first end of the first voltage dividing unit 11 is electrically connected to a positive electrode of a fast charging device, a second end of the first voltage dividing unit 11 is electrically connected to a first end of the second voltage dividing unit 12, a second end of the second voltage dividing unit 12 and a first end of the third voltage dividing unit 13 are both grounded, a second end of the third voltage dividing unit 13 is electrically connected to a first end of the fourth voltage dividing unit 14, and a second end of the fourth voltage dividing unit 14 is electrically connected to a negative electrode of the fast charging device;
the processor 20 includes a first collecting port 21 and a second collecting port 22, the first collecting port 21 is electrically connected to a first end of the second voltage dividing unit 12, the second collecting port 22 is electrically connected to a second end of the third voltage dividing unit 13, the first collecting port 21 is used for collecting a voltage signal between the first voltage dividing unit 11 and the second voltage dividing unit 12, and the second collecting port 22 is used for collecting a voltage signal between the third voltage dividing unit 13 and the fourth voltage dividing unit 14.
In the voltage acquisition device of the fast charging equipment, the voltage dividing circuit comprises a first voltage dividing resistor, a second voltage dividing resistor, a third voltage dividing resistor and a fourth voltage dividing resistor, wherein a first end of the first voltage dividing resistor is electrically connected with a positive pole of the fast charging equipment, a second end of the first voltage dividing resistor is electrically connected with a first end of the second voltage dividing resistor, a second end of the second voltage dividing resistor and a first end of the third voltage dividing resistor are both grounded, a second end of the third voltage dividing resistor is electrically connected with a first end of the fourth voltage dividing resistor, and a second end of the fourth voltage dividing resistor is electrically connected with a negative pole of the fast charging equipment; the processor comprises a first acquisition port and a second acquisition port, wherein the first acquisition port is electrically connected with a first end of the second divider resistor, the second acquisition port is electrically connected with a second end of the third divider resistor, the first acquisition port is used for acquiring a voltage signal between the first divider resistor and the second divider resistor, and the second acquisition port is used for acquiring a voltage signal between the third divider resistor and the fourth divider resistor. The device can obtain the voltage at two ends of a second divider resistor by collecting a voltage signal between the first divider resistor and the second divider resistor, can obtain the voltage at two ends of a third divider resistor by collecting a voltage signal between the third divider resistor and the fourth divider resistor, can obtain the sum of the voltage at two ends of the first divider resistor and the voltage at two ends of the second divider resistor according to the voltage division principle, namely the sum of the voltage at two ends of the third divider resistor and the voltage at two ends of the fourth divider resistor according to the voltage at two ends of the second divider resistor, the resistance of the first divider resistor and the resistance of the second divider resistor, and can obtain the sum of the voltage at two ends of the third divider resistor and the voltage at two ends of the fourth divider resistor according to the voltage at two ends of the third divider resistor, the resistance of the third divider resistor and the resistance of the fourth divider resistor, and can obtain the sum of the second divider, wherein the voltage at two ends of the quick-charging equipment is the sum of the first divider and the second divider, compared with the prior art that voltage signals are acquired through the voltage acquisition chip and need to be sent to the processor through the isolation communication chip, the structure of the voltage acquisition device is simplified, and the problem that the acquisition device of the voltages at two ends of the quick charging equipment in the prior art is complex in structure is solved.
It should be noted that, as shown in fig. 3, the charging circuit for charging the battery by the fast charging device includes a battery 01, a main positive contactor 02, a main negative contactor 03, a fast charging positive contactor 04, a fast charging negative contactor 05 and a fast charging device 06, a positive electrode PACK + of the battery 01 is electrically connected to a positive electrode DC + of the fast charging device 06 through the main positive contactor 02 and the fast charging positive contactor 04, a negative electrode PACK-of the battery 01 is electrically connected to a negative electrode DC-of the fast charging device 06 through the main negative contactor 03 and the fast charging negative contactor 05, and of course, the fast charging device 06 supplies power to an alternating current, and needs to convert the alternating current into a direct current through a converter, and the main positive contactor 02, the main negative contactor 03, the fast charging positive contactor 04 and the fast charging negative contactor 05 are all closed, so that the fast charging device 06 can charge the battery 01.
It should be noted that, as shown in fig. 4, the voltage measurement circuit is the voltage division circuit of fig. 3, the processor MCU directly collects the voltage signal, and does not need to collect the voltage signal through the voltage collection chip and send it to the processor through the isolation communication chip, so that a set of the DCDC converter, the isolation communication chip and the voltage collection chip are reduced, the area of the PCB can be greatly reduced, and only two ADC collection channels of the processor are used, and no additional processor communication resource is needed, because the existing architecture has only 1 set of isolation components, no other complex function chips, and the EMC performance is good.
In one embodiment of the present application, as shown in fig. 3, the first voltage dividing unit is formed by a first voltage dividing resistor R7, the second voltage dividing unit is formed by a second voltage dividing resistor R8, the third voltage dividing unit is formed by a third voltage dividing resistor R9, and the fourth voltage dividing unit is formed by a fourth voltage dividing resistor R10. Specifically, the first voltage dividing unit, the second voltage dividing unit, the third voltage dividing unit and the fourth voltage dividing unit all have only one voltage dividing resistor, so that the structure is further simplified, the PCB space is saved, of course, the first voltage dividing unit, the second voltage dividing unit, the third voltage dividing unit and the fourth voltage dividing unit may also be composed of a plurality of resistors connected in series, and the voltage acquired by the first acquisition port is VADC1The voltage collected by the second collecting port is VADC2The voltage V across the quick charging device is (R7+ R8) VADC1/R8+(R9+R10)VADC2/R9。
In an embodiment of the present application, the voltage dividing circuit further includes a first switch, and the first switch is located on a connection line between the second end of the first voltage dividing resistor and the first end of the second voltage dividing resistor. Specifically, when the first voltage dividing resistor and the second voltage dividing resistor have a fault such as short circuit, the first switch is controlled to be turned off, and the safety of the voltage dividing circuit is improved.
In an embodiment of the present application, the voltage divider circuit further includes a second switch, and the second switch is located on a connection line between the second end of the third voltage divider resistor and the first end of the fourth voltage divider resistor. Specifically, when the third voltage dividing resistor and the fourth voltage dividing resistor have a fault such as a short circuit, the second switch is controlled to be turned off, and the safety of the voltage dividing circuit is improved.
In an embodiment of the present application, the first switch is an optical coupling control switch. Specifically, the controller controls the on and off of the optical coupling control switch by outputting a high level or a low level, so that the automatic control of the first switch is realized, and the labor is saved.
In an embodiment of the present application, the second switch is an optical coupling control switch. Specifically, the controller controls the on and off of the optical coupling control switch by outputting a high level or a low level, so that the second switch is automatically controlled, and labor is saved.
In an embodiment of the application, the processor is configured to control the first switch to be turned on or off. Specifically, the processor may control the first switch to be turned on or off according to a predetermined program or instruction, for example, after the first collecting port is electrically connected to the first end of the second voltage dividing unit, the first switch is controlled to be turned on.
In an embodiment of the application, the processor is configured to control to turn on or off the second switch. Specifically, the processor may control the second switch to be turned on or off according to a predetermined program or instruction, and after the second collecting port is electrically connected to the second end of the third voltage dividing unit, the second switch is controlled to be turned on.
In an embodiment of the application, the processor is an MCU. Specifically, the calculated amount of the voltage signal processing is low, and the processor selects the MCU to save resources.
According to an embodiment of the application, a vehicle is provided, which includes a voltage collecting device of a fast charging device, where the voltage collecting device of the fast charging device is any one of the above devices.
In the vehicle, in a voltage acquisition device including a fast charging device, a voltage dividing circuit includes a first voltage dividing resistor, a second voltage dividing resistor, a third voltage dividing resistor, and a fourth voltage dividing resistor, a first end of the first voltage dividing resistor is electrically connected to a positive pole of the fast charging device, a second end of the first voltage dividing resistor is electrically connected to a first end of the second voltage dividing resistor, a second end of the second voltage dividing resistor and a first end of the third voltage dividing resistor are both grounded, a second end of the third voltage dividing resistor is electrically connected to a first end of the fourth voltage dividing resistor, and a second end of the fourth voltage dividing resistor is electrically connected to a negative pole of the fast charging device; the processor comprises a first acquisition port and a second acquisition port, wherein the first acquisition port is electrically connected with a first end of the second divider resistor, the second acquisition port is electrically connected with a second end of the third divider resistor, the first acquisition port is used for acquiring a voltage signal between the first divider resistor and the second divider resistor, and the second acquisition port is used for acquiring a voltage signal between the third divider resistor and the fourth divider resistor. The vehicle can obtain the voltage at two ends of the second divider resistor by collecting the voltage signal between the first divider resistor and the second divider resistor, and can obtain the voltage at two ends of the third divider resistor by collecting the voltage signal between the third divider resistor and the fourth divider resistor, according to the voltage division principle, the sum of the voltage at two ends of the first divider resistor and the voltage at two ends of the second divider resistor can be obtained by calculating according to the voltage at two ends of the second divider resistor, the resistance value of the first divider resistor and the resistance value of the second divider resistor, and is recorded as a first divided voltage, the sum of the voltage at two ends of the third divider resistor and the voltage at two ends of the fourth divider resistor can be obtained by calculating according to the voltage at two ends of the third divider resistor, the resistance value of the third divider resistor and the resistance value of the fourth divider resistor, and is recorded as a second divided voltage, the voltage at two ends of the quick-charging device is the sum of the first divided voltage and the second divided voltage, compared with the prior art that voltage signals are acquired through the voltage acquisition chip and need to be sent to the processor through the isolation communication chip, the structure of the voltage acquisition device is simplified, and the problem that the acquisition device of the voltages at two ends of the quick charging equipment in the prior art is complex in structure is solved.
From the above description, it can be seen that the above-described embodiments of the present application achieve the following technical effects:
1) in the voltage acquisition device of the quick charging equipment, the voltage dividing circuit comprises a first voltage dividing resistor, a second voltage dividing resistor, a third voltage dividing resistor and a fourth voltage dividing resistor, wherein a first end of the first voltage dividing resistor is electrically connected with a positive pole of the quick charging equipment, a second end of the first voltage dividing resistor is electrically connected with a first end of the second voltage dividing resistor, a second end of the second voltage dividing resistor and a first end of the third voltage dividing resistor are both grounded, a second end of the third voltage dividing resistor is electrically connected with a first end of the fourth voltage dividing resistor, and a second end of the fourth voltage dividing resistor is electrically connected with a negative pole of the quick charging equipment; the processor comprises a first acquisition port and a second acquisition port, wherein the first acquisition port is electrically connected with a first end of the second divider resistor, the second acquisition port is electrically connected with a second end of the third divider resistor, the first acquisition port is used for acquiring a voltage signal between the first divider resistor and the second divider resistor, and the second acquisition port is used for acquiring a voltage signal between the third divider resistor and the fourth divider resistor. The device can obtain the voltage at two ends of a second divider resistor by collecting a voltage signal between the first divider resistor and the second divider resistor, can obtain the voltage at two ends of a third divider resistor by collecting a voltage signal between the third divider resistor and the fourth divider resistor, can obtain the sum of the voltage at two ends of the first divider resistor and the voltage at two ends of the second divider resistor according to the voltage division principle, namely the sum of the voltage at two ends of the third divider resistor and the voltage at two ends of the fourth divider resistor according to the voltage at two ends of the second divider resistor, the resistance of the first divider resistor and the resistance of the second divider resistor, and can obtain the sum of the voltage at two ends of the third divider resistor and the voltage at two ends of the fourth divider resistor according to the voltage at two ends of the third divider resistor, the resistance of the third divider resistor and the resistance of the fourth divider resistor, and can obtain the sum of the second divider, wherein the voltage at two ends of the quick-charging equipment is the sum of the first divider and the second divider, compared with the prior art that voltage signals are acquired through the voltage acquisition chip and need to be sent to the processor through the isolation communication chip, the structure of the voltage acquisition device is simplified, and the problem that the acquisition device of the voltages at two ends of the quick charging equipment in the prior art is complex in structure is solved.
2) In the vehicle of the application, in the voltage acquisition device including the fast charging device, the voltage dividing circuit includes a first voltage dividing resistor, a second voltage dividing resistor, a third voltage dividing resistor and a fourth voltage dividing resistor, a first end of the first voltage dividing resistor is electrically connected with a positive pole of the fast charging device, a second end of the first voltage dividing resistor is electrically connected with a first end of the second voltage dividing resistor, a second end of the second voltage dividing resistor and a first end of the third voltage dividing resistor are both grounded, a second end of the third voltage dividing resistor is electrically connected with a first end of the fourth voltage dividing resistor, and a second end of the fourth voltage dividing resistor is electrically connected with a negative pole of the fast charging device; the processor comprises a first acquisition port and a second acquisition port, wherein the first acquisition port is electrically connected with a first end of the second divider resistor, the second acquisition port is electrically connected with a second end of the third divider resistor, the first acquisition port is used for acquiring a voltage signal between the first divider resistor and the second divider resistor, and the second acquisition port is used for acquiring a voltage signal between the third divider resistor and the fourth divider resistor. The vehicle can obtain the voltage at two ends of the second divider resistor by collecting the voltage signal between the first divider resistor and the second divider resistor, and can obtain the voltage at two ends of the third divider resistor by collecting the voltage signal between the third divider resistor and the fourth divider resistor, according to the voltage division principle, the sum of the voltage at two ends of the first divider resistor and the voltage at two ends of the second divider resistor can be obtained by calculating according to the voltage at two ends of the second divider resistor, the resistance value of the first divider resistor and the resistance value of the second divider resistor, and is recorded as a first divided voltage, the sum of the voltage at two ends of the third divider resistor and the voltage at two ends of the fourth divider resistor can be obtained by calculating according to the voltage at two ends of the third divider resistor, the resistance value of the third divider resistor and the resistance value of the fourth divider resistor, and is recorded as a second divided voltage, the voltage at two ends of the quick-charging device is the sum of the first divided voltage and the second divided voltage, compared with the prior art that voltage signals are acquired through the voltage acquisition chip and need to be sent to the processor through the isolation communication chip, the structure of the voltage acquisition device is simplified, and the problem that the acquisition device of the voltages at two ends of the quick charging equipment in the prior art is complex in structure is solved.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. The utility model provides a fill voltage acquisition device of equipment soon which characterized in that includes:
the voltage dividing circuit comprises a first voltage dividing unit, a second voltage dividing unit, a third voltage dividing unit and a fourth voltage dividing unit, wherein the first end of the first voltage dividing unit is electrically connected with a positive electrode of the quick charging equipment, the second end of the first voltage dividing unit is electrically connected with the first end of the second voltage dividing unit, the second end of the second voltage dividing unit and the first end of the third voltage dividing unit are both grounded, the second end of the third voltage dividing unit is electrically connected with the first end of the fourth voltage dividing unit, and the second end of the fourth voltage dividing unit is electrically connected with a negative electrode of the quick charging equipment;
the processor comprises a first acquisition port and a second acquisition port, wherein the first acquisition port is electrically connected with a first end of the second voltage division unit, the second acquisition port is electrically connected with a second end of the third voltage division unit, the first acquisition port is used for acquiring voltage signals between the first voltage division unit and the second voltage division unit, and the second acquisition port is used for acquiring voltage signals between the third voltage division unit and the fourth voltage division unit.
2. The apparatus of claim 1, wherein the first voltage dividing unit is formed of a first voltage dividing resistor, the second voltage dividing unit is formed of a second voltage dividing resistor, the third voltage dividing unit is formed of a third voltage dividing resistor, and the fourth voltage dividing unit is formed of a fourth voltage dividing resistor.
3. The apparatus of claim 2, wherein the voltage divider circuit further comprises:
and the first switch is positioned on a connecting line between the second end of the first voltage-dividing resistor and the first end of the second voltage-dividing resistor.
4. The apparatus of claim 2, wherein the voltage divider circuit further comprises:
and the second switch is positioned on a connecting line between the second end of the third voltage-dividing resistor and the first end of the fourth voltage-dividing resistor.
5. The apparatus of claim 3, wherein the first switch is an optocoupler controlled switch.
6. The apparatus of claim 4, wherein the second switch is an optocoupler controlled switch.
7. The apparatus of claim 3, wherein the processor is configured to control the first switch to be turned on or off.
8. The apparatus of claim 4, wherein the processor is configured to control the second switch to be turned on or off.
9. The apparatus of any one of claims 1 to 8, wherein the processor is an MCU.
10. A vehicle comprising a voltage acquisition device of a quick-charging device, wherein the voltage acquisition device of the quick-charging device is the device of any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122410843.7U CN216670107U (en) | 2021-09-30 | 2021-09-30 | Voltage acquisition device of quick charging equipment and vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122410843.7U CN216670107U (en) | 2021-09-30 | 2021-09-30 | Voltage acquisition device of quick charging equipment and vehicle |
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| Publication Number | Publication Date |
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| CN216670107U true CN216670107U (en) | 2022-06-03 |
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| CN202122410843.7U Active CN216670107U (en) | 2021-09-30 | 2021-09-30 | Voltage acquisition device of quick charging equipment and vehicle |
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