CN204422720U - Electric automobile high-voltage system and relay status pick-up unit thereof - Google Patents
Electric automobile high-voltage system and relay status pick-up unit thereof Download PDFInfo
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- CN204422720U CN204422720U CN201520111377.4U CN201520111377U CN204422720U CN 204422720 U CN204422720 U CN 204422720U CN 201520111377 U CN201520111377 U CN 201520111377U CN 204422720 U CN204422720 U CN 204422720U
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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
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
Abstract
A kind of electric automobile high-voltage system and relay status pick-up unit thereof, its pick-up unit comprises isolated communication circuit, is located at the first voltage sample device of higher-pressure region, the second voltage sample device, tertiary voltage Sampling device, the first filtering circuit, the second filtering circuit, the 3rd filtering circuit and modulus sample circuit and is located at the microcontroller of low-pressure area; First voltage sample device is connected with the power sources in parallel of electric automobile high-voltage system; Second voltage sample device one end is connected with the outer end of the positive relay of the master of electric automobile high-voltage system, and the other end is connected with the negative pole of power supply; The master of tertiary voltage Sampling device and electric automobile high-voltage system bears relay and is connected in parallel; Each filtering circuit correspondence is connected with voltage sample device; First filtering circuit, the second filtering circuit, the 3rd filtering circuit are connected with modulus sample circuit respectively, and modulus sample circuit is connected with microcontroller by isolated communication circuit.This programme only needs an isolated communication circuit, greatly reduces cost.
Description
Technical field
The utility model relates to electric vehicle engineering field, particularly relates to a kind of electric automobile high-voltage system and relay status pick-up unit thereof.
Background technology
DC power relay state-detection in electric automobile high-voltage system realizes that electric automobile powers on safely, the important technology of lower electricity.Electric automobile high-voltage parts are more, in actual moving process, when there is short-circuit failure in parts load, or full-vehicle control timing Design is unreasonable, power line can produce big current and cause relay adhesion, for the sake of security, power at electric automobile and in lower electric process, must detect relay status.
The DC power relay cost detected from contact-carrying is high, and due to the problem of production technology, often occurs the situation of erroneous judgement relay status in practical application.Right-angled intersection method is adopted to detect relay status in tradition.Need in the circuit of the method to use two isolated communication circuit and two modulus sample circuits, thus cause cost high.
Utility model content
Based on this, be necessary, for the high problem of cost, to provide a kind of electric automobile high-voltage system and relay status pick-up unit thereof.
A relay status pick-up unit for electric automobile high-voltage system, comprises isolated communication circuit, is located at the first voltage sample device of higher-pressure region, the second voltage sample device, tertiary voltage Sampling device, the first filtering circuit, the second filtering circuit, the 3rd filtering circuit and modulus sample circuit and is located at the microcontroller of low-pressure area;
Described first voltage sample device is connected with the power sources in parallel of electric automobile high-voltage system; Described second voltage sample device one end is connected with the outer end of the positive relay of the master of electric automobile high-voltage system, and the described second voltage sample device other end is connected with the negative pole of described power supply; The master of tertiary voltage Sampling device and electric automobile high-voltage system bears relay and is connected in parallel; First filtering circuit is connected with the first voltage sample device, and the second filtering circuit is connected with the second voltage sample device, and the 3rd filtering circuit is connected with tertiary voltage Sampling device; First filtering circuit, the second filtering circuit, the 3rd filtering circuit are connected with modulus sample circuit respectively, and modulus sample circuit is connected with microcontroller by isolated communication circuit;
Wherein, the outer end of the positive relay of described master is the positive relay of master of electric automobile high-voltage system and the link of load.
The relay status pick-up unit of above-mentioned electric automobile high-voltage system, by being connected the first voltage sample device with the power sources in parallel of electric automobile high-voltage system; Second voltage sample device one end is connected with the outer end of the positive relay of the master of electric automobile high-voltage system, and the second voltage sample device other end is connected with the negative pole of described power supply; The master of tertiary voltage Sampling device and electric automobile high-voltage system bears relay and is connected in parallel; First filtering circuit is connected with the first voltage sample device, and the second filtering circuit is connected with the second voltage sample device, and the 3rd filtering circuit is connected with tertiary voltage Sampling device; First filtering circuit, the second filtering circuit, the 3rd filtering circuit are connected with modulus sample circuit respectively, and modulus sample circuit is connected with microcontroller by isolated communication circuit.Take power cathode as reference point, by voltage sample device, filtering circuit, modulus sample circuit and isolated communication circuit realiration, relay status is detected, and only need an isolated communication circuit, greatly reduce cost.
Wherein in an embodiment, described first voltage sample device comprises the first voltage sample resistance and the second voltage sample resistance that are connected in series, first voltage sample resistance is connected with the positive pole of described power supply, and the second voltage sample resistance is connected with the negative pole of described power supply;
Described second voltage sample device comprises the tertiary voltage sampling resistor and the 4th voltage sample resistance that are connected in series, and described tertiary voltage sampling resistor is connected with the outer end of main positive relay, and described 4th voltage sample resistance is connected with the negative pole of power supply;
Described tertiary voltage Sampling device comprises the 5th voltage sample resistance and the 6th voltage sample resistance that are connected in series, and described 5th voltage sample resistance is connected with the outer end of main negative relay, and described 6th voltage sample resistance is connected with the negative pole of power supply;
First filtering circuit is connected with the two ends of the second voltage sample resistance, and the second filtering circuit is connected with the two ends of the 4th voltage sample resistance, and the 3rd filtering circuit is connected with the two ends of the 6th voltage sample resistance;
Wherein, described master bears the outer end of relay is the link that the master of electric automobile high-voltage system bears relay and load.
In this embodiment, each voltage sample device includes two voltage sample resistance, voltage sample resistance can be utilized to realize dividing potential drop, sampling resistor gathers small voltage and transfers to modulus sample circuit by filter circuit, thus avoids the problem needing raising modulus sample circuit performance to cause cost high because voltage is excessive.
Wherein in an embodiment, also comprise the telecommunication circuit being located at low-pressure area, described telecommunication circuit is connected with microcontroller.
By arranging telecommunication circuit, Detection Information can be transferred to other-end and carrying out showing or early warning.
Wherein in an embodiment, also comprise the early warning circuit being located at low-pressure area, described early warning circuit is connected with microcontroller.
Early warning is realized by arranging early warning circuit.
Wherein in an embodiment, also comprise the first switching device, second switch device and the 3rd switching device;
First switching device is connected with the first voltage sample devices in series, and is connected with power sources in parallel; Second switch device one end is connected with the second voltage sample device, and the other end of second switch device is connected with the outer end of the negative pole of power supply or main positive relay; 3rd switching device and tertiary voltage Sampling device are connected in series, and are connected in parallel with main negative relay.
Whether this embodiment can control to detect by switching device, when without the need to detecting, can disconnect, economize on resources.
A kind of electric automobile high-voltage system, comprising: power supply, main positive relay, load and main negative relay, pre-charge-relay, pre-charge resistance, the first voltage sample device, the second voltage sample device, tertiary voltage Sampling device, the first filtering circuit, the second filtering circuit, the 3rd filtering circuit and modulus sample circuit, isolated communication circuit and microcontroller;
Described power supply, main positive relay, load, main negative relay are connected in series composition first loop; Series connection pre-charge-relay and pre-charge resistance with lead positive relay be connected in parallel;
Described first voltage sample device is connected with power sources in parallel; Described second voltage sample device one end is connected with the outer end of main positive relay, and the described second voltage sample device other end is connected with the negative pole of power supply; Tertiary voltage Sampling device is connected in parallel with main negative relay; First filtering circuit is connected with the first voltage sample device, and the second filtering circuit is connected with the second voltage sample device, and the 3rd filtering circuit is connected with tertiary voltage Sampling device; First filtering circuit, the second filtering circuit, the 3rd filtering circuit are connected with modulus sample circuit respectively, and modulus sample circuit is connected with microcontroller by isolated communication circuit;
Wherein, the outer end of the positive relay of described master is the link of main positive relay and load.
Above-mentioned electric automobile high-voltage system, by arranging the first voltage sample device, the second voltage sample device, tertiary voltage Sampling device, the first filtering circuit, the second filtering circuit, the 3rd filtering circuit and modulus sample circuit, isolated communication circuit and microcontroller.Take power cathode as reference point, by voltage sample device, filtering circuit, modulus sample circuit and isolated communication circuit realiration, relay status is detected, and only need an isolated communication circuit, greatly reduce cost.
Wherein in an embodiment, described first voltage sample device comprises the first voltage sample resistance and the second voltage sample resistance that are connected in series, first voltage sample resistance is connected with the positive pole of described power supply, and the second voltage sample resistance is connected with the negative pole of described power supply;
Described second voltage sample device comprises the tertiary voltage sampling resistor and the 4th voltage sample resistance that are connected in series, and described tertiary voltage sampling resistor is connected with the outer end of main positive relay, and described 4th voltage sample resistance is connected with the negative pole of power supply;
Described tertiary voltage Sampling device comprises the 5th voltage sample resistance and the 6th voltage sample resistance that are connected in series, and described 5th voltage sample resistance is connected with the outer end of main negative relay, and described 6th voltage sample resistance is connected with the negative pole of power supply;
First filtering circuit is connected with the two ends of the second voltage sample resistance, and the second filtering circuit is connected with the two ends of the 4th voltage sample resistance, and the 3rd filtering circuit is connected with the two ends of the 6th voltage sample resistance;
Wherein, described master bears the link that the outer end of relay is main negative relay and load.
In this embodiment, each voltage sample device includes two voltage sample resistance, voltage sample resistance can be utilized to realize dividing potential drop, sampling resistor gathers small voltage and transfers to modulus sample circuit by filter circuit, thus avoids the problem needing raising modulus sample circuit performance to cause cost high because voltage is excessive.
Wherein in an embodiment, also comprise telecommunication circuit, described telecommunication circuit is connected with microcontroller.
By arranging telecommunication circuit, Detection Information can be transferred to other-end and carrying out showing or early warning.
Wherein in an embodiment, also comprise early warning circuit, described early warning circuit is connected with microcontroller.
Early warning is realized by arranging early warning circuit.
Wherein in an embodiment, also comprise the first switching device, second switch device and the 3rd switching device;
First switching device is connected with the first voltage sample devices in series, and is connected with power sources in parallel; Second switch device one end is connected with the second voltage sample device, and the other end of second switch device is connected with the outer end of the negative pole of power supply or main positive relay; 3rd switching device and tertiary voltage Sampling device are connected in series, and are connected in parallel with main negative relay.
Whether this embodiment can control to detect by switching device, when without the need to detecting, can disconnect, economize on resources.
Accompanying drawing explanation
Fig. 1 is electric automobile high-voltage system architecture schematic diagram to be measured in one of them embodiment of the utility model;
Fig. 2 is the structural representation of the relay status pick-up unit embodiment one of the utility model electric automobile high-voltage system;
Fig. 3 is the structural representation of the relay status pick-up unit embodiment two of the utility model electric automobile high-voltage system.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
The relay status pick-up unit of the electric automobile high-voltage system that the utility model embodiment provides can be used for the electric automobile high-voltage system detected as shown in Figure 1.Please refer to shown in Fig. 1, is one of them detected object structural representation of the utility model.Electric automobile high-voltage system comprises: power supply 110, main positive relay 120, load 130 and main negative relay 140, pre-charge-relay 150, pre-charge resistance 160; The positive pole of described power supply 110 is connected with the first end of main positive relay 120, and the second end of the positive relay 120 of described master is connected by the first end of load 130 with main negative relay 140, and the second end of main negative relay 140 is connected with the negative pole of power supply 110; The pre-charge-relay 150 of series connection and pre-charge resistance 160 are connected in parallel with main positive relay 120.Wherein, the second end leading positive relay can be called again the outer end of main positive relay (link of main positive relay and load).The first end of main negative relay can be called again the outer end (link of main negative relay and load) of main negative relay.Load can comprise the motor, controller, high-pressure air conditioner etc. of electric automobile, is the load of band dc-link capacitance.Wherein, described A point represents the positive pole of power supply, and described B point represents the outer end of main positive relay, and described C point represents the outer end of main negative relay, and described G point represents the negative pole of power supply.As shown in Figure 2, be the structural representation of the relay status pick-up unit embodiment one of the utility model electric automobile high-voltage system, in order to accompanying drawing is clear, object to be detected do not illustrated, directly represent each end of object to be detected with A point, B point, C point and G point.Pick-up unit comprises isolated communication circuit 280, is located at the first voltage sample device 210, second voltage sample device 220 of higher-pressure region, tertiary voltage Sampling device 230, first filtering circuit 240, second filtering circuit 250, the 3rd filtering circuit 260 and modulus sample circuit 270 and is located at the microcontroller 290 (Micro Control Unit, MCU) of low-pressure area;
Described first voltage sample device 210 is connected with the power sources in parallel of electric automobile high-voltage system; Described second voltage sample device 220 one end is connected with the outer end of the positive relay of the master of electric automobile high-voltage system, and described second voltage sample device 220 other end is connected with the negative pole of described power supply; Tertiary voltage Sampling device 230 is born relay with the master of electric automobile high-voltage system and is connected in parallel; First filtering circuit 240 is connected with the first voltage sample device 210, and the second filtering circuit 250 is connected with the second voltage sample device 220, and the 3rd filtering circuit 260 is connected with tertiary voltage Sampling device 230; First filtering circuit 240, second filtering circuit 250, the 3rd filtering circuit 260 are connected with modulus sample circuit 270 respectively, and modulus sample circuit 270 is connected with microcontroller 290 by isolated communication circuit 280;
Wherein, the outer end of the positive relay of described master is the positive relay of master of electric automobile high-voltage system and the link of load.Described A point represents the positive pole of power supply, and described B point represents the outer end of main positive relay, and described C point represents the outer end of main negative relay, and described G point represents the negative pole of power supply.
The relay status pick-up unit of above-mentioned electric automobile high-voltage system, by being connected the first voltage sample device with the power sources in parallel of electric automobile high-voltage system; Second voltage sample device one end is connected with the outer end of the positive relay of the master of electric automobile high-voltage system, and the second voltage sample device other end is connected with the negative pole of described power supply; The master of tertiary voltage Sampling device and electric automobile high-voltage system bears relay and is connected in parallel; First filtering circuit is connected with the first voltage sample device, and the second filtering circuit is connected with the second voltage sample device, and the 3rd filtering circuit is connected with tertiary voltage Sampling device; First filtering circuit, the second filtering circuit, the 3rd filtering circuit are connected with modulus sample circuit respectively, and modulus sample circuit is connected with microcontroller by isolated communication circuit.Take power cathode as reference point, by voltage sample device, filtering circuit, modulus sample circuit and isolated communication circuit realiration, relay status is detected, and only need an isolated communication circuit, greatly reduce cost.
Simply introduce the principle of work of this embodiment:
Microcontroller to gather under electric automobile main positive relay, main negative relay and pre-charge-relay in electric process receive simultaneously and under performing open command state A point to the voltage of G point, B point to the voltage of G point and C point to the voltage of G point; According to the A point in lower electric process, to the voltage of G point, B point, to the voltage of G point and C point, the voltage to G point judges whether adhesion or the pre-charge-relay whether adhesion of main positive relay, judges mainly to bear relay whether adhesion.Certainly can also carry out the detection of power up, to gather in main positive relay in power up, main negative relay and pre-charge-relay two relays at the most receive and A point under performing close command state to the voltage of G point, B point to the voltage of G point and C point to the voltage of G point; According to A point in power up, to the voltage of G point, B point, to the voltage of G point and C point, the voltage to G point judges whether adhesion or the pre-charge-relay whether adhesion of main positive relay, judges mainly to bear relay whether adhesion.
Voltage sample device can be voltage sample resistance, and the number of voltage sample resistance sets as required.When sampled voltage is less than voltage threshold, voltage sample device only can comprise a voltage sample resistance.When sampled voltage is greater than voltage threshold, voltage sample device can comprise multiple voltage sample resistance.Voltage threshold determines according to modulus sample circuit, such as, can be 5V.Wherein in an embodiment, as shown in Figure 3, be the structural representation of the relay status pick-up unit embodiment two of the utility model electric automobile high-voltage system, in order to accompanying drawing is clear, object to be detected is not illustrated, directly represent each end of object to be detected with A point, B point, C point and G point.Described first voltage sample device comprises the first voltage sample resistance 311 of being connected in series and the second voltage sample resistance 312, first voltage sample resistance 311 is connected with the positive pole of described power supply, and the second voltage sample resistance 312 is connected with the negative pole of described power supply;
Described second voltage sample device comprises the tertiary voltage sampling resistor 321 and the 4th voltage sample resistance 322 that are connected in series, described tertiary voltage sampling resistor 321 is connected with the outer end of main positive relay, and described 4th voltage sample resistance 322 is connected with the negative pole of power supply;
Described tertiary voltage Sampling device comprises the 5th voltage sample resistance 331 and the 6th voltage sample resistance 332 that are connected in series, and described 5th voltage sample resistance is connected with the outer end of main negative relay, and described 6th voltage sample resistance is connected with the negative pole of power supply;
First filtering circuit 340 is connected with the two ends of the second voltage sample resistance 312, and the second filtering circuit 350 is connected with the two ends of the 4th voltage sample resistance 322, and the 3rd filtering circuit 360 is connected with the two ends of the 6th voltage sample resistance 332;
Wherein, described master bears the outer end of relay is the link that the master of electric automobile high-voltage system bears relay and load.
In this embodiment, each voltage sample device includes two voltage sample resistance, voltage sample resistance can be utilized to realize dividing potential drop, sampling resistor gathers small voltage and transfers to modulus sample circuit by filter circuit, thus avoids the problem needing raising modulus sample circuit performance to cause cost high because voltage is excessive.The computing the resistor value of the voltage that microprocessor can be sampled according to the second voltage sample resistance 312 and two sampling resistors 311 and 312 goes out corresponding A point to the voltage of G point; The computing the resistor value of the voltage that microprocessor can be sampled according to the 4th voltage sample resistance 322 and two sampling resistors 321 and 322 goes out corresponding B point to the voltage of G point; The computing the resistor value of the voltage that microprocessor can be sampled according to the 6th voltage sample resistance 332 and two sampling resistors 331 and 332 goes out corresponding C point to the voltage of G point.Thus carry out the detection of upper voltage and lower voltage.
Wherein in an embodiment, also comprise the telecommunication circuit being located at low-pressure area, described telecommunication circuit is connected with microcontroller.
By arranging telecommunication circuit, Detection Information can be transferred to other-end and carrying out showing or early warning.Telecommunication circuit can be CAN (Controller Area Network, controller local area network) circuit.
Wherein in an embodiment, also comprise the early warning circuit being located at low-pressure area, described early warning circuit is connected with microcontroller.
Early warning is realized by arranging early warning circuit.
Wherein in an embodiment, pick-up unit also comprises the first switching device, second switch device and the 3rd switching device;
First switching device is connected with the first voltage sample devices in series, and is connected with power sources in parallel; Second switch device one end is connected with the second voltage sample device, and the other end of second switch device is connected with the outer end of the negative pole of power supply or main positive relay; 3rd switching device and tertiary voltage Sampling device are connected in series, and are connected in parallel with main negative relay.
Whether this embodiment can control to detect by switching device, when without the need to detecting, can disconnect, economize on resources.The number of switching device can be multiple, such as respectively establishes one at the first voltage sample device two ends; One is respectively established at the second voltage sample device two ends; One is respectively established at tertiary voltage Sampling device two ends.
Various technical characteristics in above embodiment can combine arbitrarily, as long as there is not conflict or contradiction in the combination between feature, but as space is limited, describe one by one, the carrying out arbitrarily combining of the various technical characteristics therefore in above-mentioned embodiment also belongs to this instructions scope of disclosure.
Based on the relay status pick-up unit of electric automobile high-voltage system, also provide a kind of electric automobile high-voltage system with pick-up unit.A kind of electric automobile high-voltage system, comprising: power supply, main positive relay, load and main negative relay, pre-charge-relay, pre-charge resistance, the first voltage sample device, the second voltage sample device, tertiary voltage Sampling device, the first filtering circuit, the second filtering circuit, the 3rd filtering circuit and modulus sample circuit, isolated communication circuit and microcontroller;
Described power supply, main positive relay, load, main negative relay are connected in series composition first loop; Series connection pre-charge-relay and pre-charge resistance with lead positive relay be connected in parallel;
Described first voltage sample device is connected with power sources in parallel; Described second voltage sample device one end is connected with the outer end of main positive relay, and the described second voltage sample device other end is connected with the negative pole of power supply; Tertiary voltage Sampling device is connected in parallel with main negative relay; First filtering circuit is connected with the first voltage sample device, and the second filtering circuit is connected with the second voltage sample device, and the 3rd filtering circuit is connected with tertiary voltage Sampling device; First filtering circuit, the second filtering circuit, the 3rd filtering circuit are connected with modulus sample circuit respectively, and modulus sample circuit is connected with microcontroller by isolated communication circuit;
Wherein, the outer end of the positive relay of described master is the link of main positive relay and load.
Above-mentioned electric automobile high-voltage system, by arranging the first voltage sample device, the second voltage sample device, tertiary voltage Sampling device, the first filtering circuit, the second filtering circuit, the 3rd filtering circuit and modulus sample circuit, isolated communication circuit and microcontroller.Take power cathode as reference point, by voltage sample device, filtering circuit, modulus sample circuit and isolated communication circuit realiration, relay status is detected, and only need an isolated communication circuit, greatly reduce cost.
Wherein in an embodiment, described first voltage sample device comprises the first voltage sample resistance and the second voltage sample resistance that are connected in series, first voltage sample resistance is connected with the positive pole of described power supply, and the second voltage sample resistance is connected with the negative pole of described power supply;
Described second voltage sample device comprises the tertiary voltage sampling resistor and the 4th voltage sample resistance that are connected in series, and described tertiary voltage sampling resistor is connected with the outer end of main positive relay, and described 4th voltage sample resistance is connected with the negative pole of power supply;
Described tertiary voltage Sampling device comprises the 5th voltage sample resistance and the 6th voltage sample resistance that are connected in series, and described 5th voltage sample resistance is connected with the outer end of main negative relay, and described 6th voltage sample resistance is connected with the negative pole of power supply;
First filtering circuit is connected with the two ends of the second voltage sample resistance, and the second filtering circuit is connected with the two ends of the 4th voltage sample resistance, and the 3rd filtering circuit is connected with the two ends of the 6th voltage sample resistance;
Wherein, described master bears the link that the outer end of relay is main negative relay and load.
In this embodiment, each voltage sample device includes two voltage sample resistance, voltage sample resistance can be utilized to realize dividing potential drop, sampling resistor gathers small voltage and transfers to modulus sample circuit by filter circuit, thus avoids the problem needing raising modulus sample circuit performance to cause cost high because voltage is excessive.
Wherein in an embodiment, also comprise telecommunication circuit, described telecommunication circuit is connected with microcontroller.
By arranging telecommunication circuit, Detection Information can be transferred to other-end and carrying out showing or early warning.
Wherein in an embodiment, also comprise early warning circuit, described early warning circuit is connected with microcontroller.
Early warning is realized by arranging early warning circuit.
Wherein in an embodiment, also comprise the first switching device, second switch device and the 3rd switching device;
First switching device is connected with the first voltage sample devices in series, and is connected with power sources in parallel; Second switch device one end is connected with the second voltage sample device, and the other end of second switch device is connected with the outer end of the negative pole of power supply or main positive relay; 3rd switching device and tertiary voltage Sampling device are connected in series, and are connected in parallel with main negative relay.
Whether this embodiment can control to detect by switching device, when without the need to detecting, can disconnect, economize on resources.
Various technical characteristics in above embodiment can combine arbitrarily, as long as there is not conflict or contradiction in the combination between feature, but as space is limited, describe one by one, the carrying out arbitrarily combining of the various technical characteristics therefore in above-mentioned embodiment also belongs to this instructions scope of disclosure.
The above embodiment only have expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (10)
1. the relay status pick-up unit of an electric automobile high-voltage system, is characterized in that, comprise isolated communication circuit, be located at the first voltage sample device of higher-pressure region, the second voltage sample device, tertiary voltage Sampling device, the first filtering circuit, the second filtering circuit, the 3rd filtering circuit and modulus sample circuit and be located at the microcontroller of low-pressure area;
Described first voltage sample device is connected with the power sources in parallel of electric automobile high-voltage system; Described second voltage sample device one end is connected with the outer end of the positive relay of the master of electric automobile high-voltage system, and the described second voltage sample device other end is connected with the negative pole of described power supply; The master of tertiary voltage Sampling device and electric automobile high-voltage system bears relay and is connected in parallel; First filtering circuit is connected with the first voltage sample device, and the second filtering circuit is connected with the second voltage sample device, and the 3rd filtering circuit is connected with tertiary voltage Sampling device; First filtering circuit, the second filtering circuit, the 3rd filtering circuit are connected with modulus sample circuit respectively, and modulus sample circuit is connected with microcontroller by isolated communication circuit;
Wherein, the outer end of the positive relay of described master is the positive relay of master of electric automobile high-voltage system and the link of load.
2. the relay status pick-up unit of electric automobile high-voltage system according to claim 1, it is characterized in that, described first voltage sample device comprises the first voltage sample resistance and the second voltage sample resistance that are connected in series, first voltage sample resistance is connected with the positive pole of described power supply, and the second voltage sample resistance is connected with the negative pole of described power supply;
Described second voltage sample device comprises the tertiary voltage sampling resistor and the 4th voltage sample resistance that are connected in series, and described tertiary voltage sampling resistor is connected with the outer end of main positive relay, and described 4th voltage sample resistance is connected with the negative pole of power supply;
Described tertiary voltage Sampling device comprises the 5th voltage sample resistance and the 6th voltage sample resistance that are connected in series, and described 5th voltage sample resistance is connected with the outer end of main negative relay, and described 6th voltage sample resistance is connected with the negative pole of power supply;
First filtering circuit is connected with the two ends of the second voltage sample resistance, and the second filtering circuit is connected with the two ends of the 4th voltage sample resistance, and the 3rd filtering circuit is connected with the two ends of the 6th voltage sample resistance; Wherein, described master bears the outer end of relay is the link that the master of electric automobile high-voltage system bears relay and load.
3. the relay status pick-up unit of electric automobile high-voltage system according to claim 1 and 2, is characterized in that, also comprises the telecommunication circuit being located at low-pressure area, and described telecommunication circuit is connected with microcontroller.
4. the relay status pick-up unit of electric automobile high-voltage system according to claim 1 and 2, is characterized in that, also comprises the early warning circuit being located at low-pressure area, and described early warning circuit is connected with microcontroller.
5. the relay status pick-up unit of electric automobile high-voltage system according to claim 1 and 2, is characterized in that, also comprises the first switching device, second switch device and the 3rd switching device;
First switching device is connected with the first voltage sample devices in series, and is connected with power sources in parallel; Second switch device one end is connected with the second voltage sample device, and the other end of second switch device is connected with the outer end of the negative pole of power supply or main positive relay; 3rd switching device and tertiary voltage Sampling device are connected in series, and are connected in parallel with main negative relay.
6. an electric automobile high-voltage system, it is characterized in that, comprising: power supply, main positive relay, load and main negative relay, pre-charge-relay, pre-charge resistance, the first voltage sample device, the second voltage sample device, tertiary voltage Sampling device, the first filtering circuit, the second filtering circuit, the 3rd filtering circuit and modulus sample circuit, isolated communication circuit and microcontroller;
Described power supply, main positive relay, load, main negative relay are connected in series composition first loop; Series connection pre-charge-relay and pre-charge resistance with lead positive relay be connected in parallel;
Described first voltage sample device is connected with power sources in parallel; Described second voltage sample device one end is connected with the outer end of main positive relay, and the described second voltage sample device other end is connected with the negative pole of power supply; Tertiary voltage Sampling device is connected in parallel with main negative relay; First filtering circuit is connected with the first voltage sample device, and the second filtering circuit is connected with the second voltage sample device, and the 3rd filtering circuit is connected with tertiary voltage Sampling device; First filtering circuit, the second filtering circuit, the 3rd filtering circuit are connected with modulus sample circuit respectively, and modulus sample circuit is connected with microcontroller by isolated communication circuit;
Wherein, the outer end of the positive relay of described master is the link of main positive relay and load.
7. electric automobile high-voltage system according to claim 6, it is characterized in that, described first voltage sample device comprises the first voltage sample resistance and the second voltage sample resistance that are connected in series, first voltage sample resistance is connected with the positive pole of described power supply, and the second voltage sample resistance is connected with the negative pole of described power supply;
Described second voltage sample device comprises the tertiary voltage sampling resistor and the 4th voltage sample resistance that are connected in series, and described tertiary voltage sampling resistor is connected with the outer end of main positive relay, and described 4th voltage sample resistance is connected with the negative pole of power supply;
Described tertiary voltage Sampling device comprises the 5th voltage sample resistance and the 6th voltage sample resistance that are connected in series, and described 5th voltage sample resistance is connected with the outer end of main negative relay, and described 6th voltage sample resistance is connected with the negative pole of power supply;
First filtering circuit is connected with the two ends of the second voltage sample resistance, and the second filtering circuit is connected with the two ends of the 4th voltage sample resistance, and the 3rd filtering circuit is connected with the two ends of the 6th voltage sample resistance;
Wherein, described master bears the link that the outer end of relay is main negative relay and load.
8. the electric automobile high-voltage system according to claim 6 or 7, is characterized in that, also comprise telecommunication circuit, described telecommunication circuit is connected with microcontroller.
9. the electric automobile high-voltage system according to claim 6 or 7, is characterized in that, also comprise early warning circuit, described early warning circuit is connected with microcontroller.
10. the electric automobile high-voltage system according to claim 6 or 7, is characterized in that, also comprises the first switching device, second switch device and the 3rd switching device;
First switching device is connected with the first voltage sample devices in series, and is connected with power sources in parallel; Second switch device one end is connected with the second voltage sample device, and the other end of second switch device is connected with the outer end of the negative pole of power supply or main positive relay; 3rd switching device and tertiary voltage Sampling device are connected in series, and are connected in parallel with main negative relay.
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| CN201520111377.4U CN204422720U (en) | 2015-02-13 | 2015-02-13 | Electric automobile high-voltage system and relay status pick-up unit thereof |
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Effective date of registration: 20220107 Address after: 511434 No. 36, Longying Road, Shilou Town, Panyu District, Guangzhou City, Guangdong Province Patentee after: GAC AIAN New Energy Vehicle Co.,Ltd. Address before: 510030 23 building, Cheng Yue mansion 448-458, Dongfeng Middle Road, Yuexiu District, Guangzhou, Guangdong. Patentee before: GUANGZHOU AUTOMOBILE GROUP Co.,Ltd. |
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