CN210437018U - High-voltage power distribution device for electric system of electric vehicle - Google Patents
High-voltage power distribution device for electric system of electric vehicle Download PDFInfo
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- CN210437018U CN210437018U CN201920547660.XU CN201920547660U CN210437018U CN 210437018 U CN210437018 U CN 210437018U CN 201920547660 U CN201920547660 U CN 201920547660U CN 210437018 U CN210437018 U CN 210437018U
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Abstract
The utility model discloses a high-pressure distribution device for electric automobile's electrical system, this electrical system includes positive bus of high-voltage circuit and high-voltage circuit negative pole bus, high-pressure distribution device is including having the interface that charges and the positive negative pole relay that charges of the positive negative pole of interface that charges, high-pressure distribution device has safety inspection device, safety inspection device is connected to respectively via mutually independent voltage signal acquisition line and is located the positive bus of high-voltage circuit, high-voltage circuit negative pole bus, the connecting wire of the positive pole relay that charges, a plurality of voltage acquisition points of the connecting wire of the negative pole relay that charges, and confirm the safe state of the positive pole relay that charges through the comparison of the potential difference of each acquisition point. According to the utility model discloses a high voltage distribution device for electric automobile's electrical system can realize having positive effect to the security level that improves whole high voltage system to the timely effectual safety inspection of high voltage component such as high-voltage relay.
Description
Technical Field
The utility model relates to a high-voltage part among electric automobile's the electrical system especially relates to a high-voltage distribution device for electric automobile's electrical system.
Background
As is known, in an electrical system of an electric vehicle, a high-voltage system is an extremely important component, and a high-voltage distribution module therein is responsible for distributing current of each branch and has important functions of switching and protecting a rear-end load so that the rear-end load can normally operate according to an instruction sent by an electric control system. In the loop design of a high-voltage system of an electric automobile, a high-voltage relay and a high-voltage fuse in a high-voltage power distribution module are of great importance to the normal operation and safety guarantee of the whole system, but the high-voltage power distribution module in the existing automobile lacks a safety detection mechanism for the high-voltage relay and the high-voltage fuse. Although some relays have auxiliary contacts, the auxiliary contacts and the main contacts are pulled back by the resilience force of the springs, so that the auxiliary contacts are pulled back by the springs after the main contacts are adhered, and whether the main contacts are adhered cannot be accurately monitored.
In summary, in the conventional high-voltage power distribution device for an electric vehicle, when a relay is stuck or malfunctions, or a fuse is blown, for example, it is impossible to quickly detect the occurrence of such situations and to quickly respond thereto.
Accordingly, there is a need for a new high voltage power distribution apparatus for an electrical system of an electric vehicle that eliminates the above-mentioned deficiencies of the prior art.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a high voltage distribution device for electric automobile's electrical system in order to overcome the defect that high voltage distribution module among the current electric automobile lacks the effective safety inspection mechanism to high voltage element such as high-voltage relay.
The utility model discloses a solve above-mentioned technical problem through adopting following technical scheme:
the utility model provides a high-voltage distribution device for electric automobile's electrical system, electrical system includes microcontroller, battery and connection microcontroller with the high-voltage circuit positive bus and the high-voltage circuit negative pole bus of battery, its characteristics lie in, high-voltage distribution device includes:
the charging interface is provided with a charging interface anode and a charging interface cathode;
the two ends of the charging interface are respectively connected to the positive electrode of the charging interface and the charging positive electrode relay of the high-voltage circuit positive electrode bus;
the two ends of the charging interface are respectively connected to the negative electrode of the charging interface and the charging negative electrode relay of the high-voltage circuit negative electrode bus;
the safety detection device is used for monitoring the safety state of a high-voltage element and is respectively connected to a first voltage acquisition point positioned on a positive bus of the high-voltage circuit, a second voltage acquisition point positioned on a negative bus of the high-voltage circuit, a third voltage acquisition point positioned on a connecting line of a positive electrode of the charging interface and the charging positive relay, and a fourth voltage acquisition point positioned on a connecting line of a negative electrode of the charging interface and the charging negative relay through mutually independent voltage signal acquisition lines,
wherein the safety detection device is configured to be able to collect the voltage signals of the first voltage collection point, the second voltage collection point, the third voltage collection point, and the fourth voltage collection point via the voltage signal collection line, respectively, and compare the potential difference of the voltage signals obtained at the second voltage collection point and the third voltage collection point with a reference potential difference, and compare the potential difference of the voltage signals obtained at the first voltage collection point and the fourth voltage collection point with a reference potential difference, thereby determining the safety state of the charging positive relay and the charging negative relay, wherein the reference potential difference is the potential difference of the voltage signals of the first voltage collection point and the second voltage collection point.
Preferably, the high voltage power distribution device further comprises an electrical equipment interface, the electrical equipment interface comprises an electrical equipment interface anode and an electrical equipment interface cathode, the electrical equipment interface anode is connected to the high voltage circuit anode bus through a high voltage fuse and a connecting wire, the electrical equipment interface anode is connected to the high voltage circuit anode bus through a connecting wire,
the safety detection device is further connected to a fifth voltage acquisition point on a connecting line between the positive electrode of the electric equipment interface and the high-voltage fuse through the voltage signal acquisition line, and the safety detection device is further configured to be capable of acquiring a voltage signal obtained at the fifth voltage acquisition point through the voltage signal acquisition line and comparing a potential difference of the voltage signals at the second voltage acquisition point and the fifth voltage acquisition point with the reference potential difference to determine the fusing state of the high-voltage fuse.
Preferably, the high-voltage power distribution device further comprises a plurality of electrical equipment interfaces, and the electrical equipment interfaces comprise a part or all of a refrigeration equipment interface, a heating equipment interface, a vehicle-mounted generator interface and a direct-current transformation interface.
Preferably, the safety detection device is further configured to be capable of communicating with an external controller of the electric vehicle via a CAN bus of the electric vehicle, so as to receive a signal request of the external controller to feed back the comparison result to the external controller via the CAN bus of the electric vehicle.
Preferably, the high-voltage distribution device further comprises a high-voltage distribution box, and the safety detection device, the high-voltage fuse, the charging positive relay, the charging negative relay and the voltage signal acquisition line are all located in the high-voltage distribution box.
On the basis of the common knowledge in the field, the above preferred conditions can be combined at will to obtain the preferred embodiments of the present invention.
The utility model discloses an actively advance the effect and lie in:
according to the utility model discloses a high voltage distribution device for electric automobile's electrical system can realize having positive effect to the security level that improves whole high voltage system to the timely effectual safety inspection of high voltage component such as high-voltage relay.
Drawings
Fig. 1 is a schematic diagram of a high voltage power distribution apparatus for an electrical system of an electric vehicle according to a preferred embodiment of the present invention.
Description of the reference numerals
1: high-voltage distribution box 2: high-voltage fuse
31: charging positive electrode relay 32: charging cathode relay
4: the safety detection device 5: low-voltage signal wire harness
6: voltage signal collection line 71: positive bus of high-voltage circuit
72: high-voltage circuit cathode bus
Detailed Description
The following detailed description of the preferred embodiments of the present invention is provided in conjunction with the accompanying drawings, and the following description is exemplary and not intended to limit the present invention, and any other similar cases will fall within the scope of the present invention. In the following detailed description, directional terms, such as "left", "right", "upper", "lower", "front", "rear", and the like, are used with reference to the orientation as illustrated in the drawings.
As shown in fig. 1, the high voltage power distribution apparatus for an electric system of an electric vehicle according to the preferred embodiment of the present invention includes a microcontroller (i.e., MCU in the figure), a BATTERY (i.e., BATTERY in the figure), and a high voltage positive bus 71 and a high voltage negative bus 72 connecting the microcontroller and the BATTERY.
This high voltage power distribution device includes: the charging interface is provided with a charging interface anode and a charging interface cathode; the charging positive relay 31 is connected with the positive electrode of the charging interface and the positive electrode bus 71 of the high-voltage circuit at two ends respectively; a charging negative relay 32 having two ends connected to the negative electrode of the charging interface and the negative electrode bus 72 of the high-voltage circuit, respectively; and a safety detection device 4 for monitoring the safety state of the high-voltage element. The high-voltage element referred to herein may be various circuit elements connected in the high-voltage circuit loop, such as a charging negative relay 32, a charging positive relay 31, and the like.
The safety detection device 4 is configured to be connected to a first voltage collection point d on the high-voltage circuit positive bus 71, a second voltage collection point f on the high-voltage circuit negative bus 72, a third voltage collection point e on the connection line of the charging interface positive and charging positive relay 31, and a fourth voltage collection point g on the connection line of the charging interface negative and charging negative relay 32, respectively, via mutually independent voltage signal collection lines 6.
Wherein the safing detecting means 4 is configured to be able to acquire the voltage signals of the first voltage acquisition point d, the second voltage acquisition point f, the third voltage acquisition point e, the fourth voltage acquisition point g via the voltage signal acquisition line 6, respectively, and compare the potential difference of the voltage signals obtained at the second voltage acquisition point f and the third voltage acquisition point e with a reference potential difference, and compare the potential difference of the voltage signals obtained at the first voltage acquisition point d and the fourth voltage acquisition point g with the reference potential difference, thereby determining the safing states of the charging positive relay 31 and the charging negative relay 32, wherein the reference potential difference is the potential difference of the voltage signals of the first voltage acquisition point d and the second voltage acquisition point f.
For example, when the charging positive relay 31 is controlled to pull in, when the comparison result between the potential difference of the voltage signals obtained from the second voltage collecting point f and the third voltage collecting point e and the reference potential difference shows that the former is too low, it indicates that the safety state of the charging positive relay 31 may be poor and there may be a pull-in fault; when the charging positive relay 31 is controlled to be turned off, if the comparison result between the potential difference of the voltage signals obtained from the second voltage collecting point f and the third voltage collecting point e and the reference potential difference shows that the former and the latter are substantially the same, it indicates that the safety state of the charging positive relay 31 may be poor and there may be an adhesion fault. The determination of the safety state of the charging negative relay 32 is similar to the determination of the safety state of the charging positive relay 31, and the difference is mainly that the comparison result of the potential difference of the voltage signals obtained from the first voltage collecting point d and the fourth voltage collecting point g and the reference potential difference is used as the determination basis, and the pull-in fault and the adhesion fault which may occur to the charging positive relay 31 can be detected.
According to some preferred embodiments of the present invention, the high voltage power distribution device may further include a power consumption device interface such as that shown on the left side of fig. 1, and the power consumption device interface may include a power consumption device interface such as a refrigeration device or an air conditioning device interface (i.e., an AC interface in the figure), a heating device interface (i.e., a PTC interface in the figure), a dc voltage conversion module interface (i.e., a DCDC interface in the figure) of a power consumption device in a vehicle, an on-board charger interface (i.e., an OBC interface in the figure), and. In the embodiment shown in fig. 1, the dc voltage conversion module interface and the on-board charger interface of the in-vehicle electrical device may be the same interface or share one interface.
The electrical equipment interfaces may each include a corresponding electrical equipment interface anode and an electrical equipment interface cathode, the electrical equipment interface anode is connected to the high-voltage circuit anode bus 71 via the high-voltage fuse 2 and the connection line, and the electrical equipment interface anode is connected to the high-voltage circuit anode bus 71 via the connection line.
In the above-mentioned preferred embodiment of the present invention, the safety detection device 4 is further configured to be connected to the fifth voltage collecting point on the connection line between the electrical equipment interface anode and the high voltage fuse 2 via the voltage signal collecting line 6, and the safety detection device 4 is further configured to be able to collect the voltage signal obtained at the fifth voltage collecting point via the voltage signal collecting line 6, and compare the potential difference of the voltage signal at the second voltage collecting point f and the fifth voltage collecting point with the reference potential difference to determine the fusing state of the high voltage fuse 2.
For example, when the comparison result of the potential difference of the voltage signals of the second voltage collecting point f and the fifth voltage collecting point with the reference potential difference shows that the former is too low, it indicates that the high voltage fuse 2 connected to the corresponding electrical equipment interface may be blown. It should be understood that the above described detection approach may be adapted to various types of powered device interfaces, such as the AC interface, PTC interface, DCDC & OBC interface, etc. listed above as shown in fig. 1. It should also be understood that three consumer interfaces are shown in fig. 1, which correspond to three respective fifth voltage collection points a, b, c.
According to some preferred embodiments of the utility model, positive relay 31 charges, negative relay 32 charges can choose for use to be suitable for the fast positive relay that fills who fills soon and fill negative relay, and is corresponding, the interface that charges that has the interface positive pole that charges and the interface negative pole that charges among this high voltage distribution device, the optional interface that fills that has the interface positive pole that fills soon and fill the interface negative pole soon.
According to some preferred embodiments of the utility model, high voltage distribution device still includes high voltage distribution box 1, and safety inspection device 4, high voltage fuse 2, the anodal relay 31 that charges, the negative pole relay 32 that charges and voltage signal acquisition line 6 all are in high voltage distribution box 1.
According to some preferred embodiments of the present invention, the safety detection device 4 is further configured to be able to be connected to the CAN bus of the electric vehicle via the low voltage signal harness 5 and then communicate with the external controller of the electric vehicle, so as to receive the signal request of the external controller to feed back the comparison result to the external controller via the CAN bus of the electric vehicle. This can be adapted to a case where the external controller is not installed in the high-voltage distribution box 1 in which the high-voltage system actuator is located. Moreover, with the configuration, the external controller and the high-voltage element as the monitoring object are not in the same box assembly, and the safety detection device 4 CAN perform signal request and state feedback in a CAN communication mode without performing high-voltage signal exchange externally, which is beneficial to improving the safety level of the high-voltage system. Meanwhile, the safety detection device 4 is close to the signal source, the signal attenuation is small, and the acquisition and detection results are more accurate and reliable.
Although particular embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are examples only and that the scope of the present invention is defined by the appended claims. Various changes and modifications to these embodiments can be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications all fall within the scope of the present invention.
Claims (5)
1. A high voltage power distribution apparatus for an electrical system of an electric vehicle, the electrical system including a microcontroller, a battery, and a high voltage positive bus and a high voltage negative bus connecting the microcontroller and the battery, the high voltage power distribution apparatus comprising:
the charging interface is provided with a charging interface anode and a charging interface cathode;
the two ends of the charging interface are respectively connected to the positive electrode of the charging interface and the charging positive electrode relay of the high-voltage circuit positive electrode bus;
the two ends of the charging interface are respectively connected to the negative electrode of the charging interface and the charging negative electrode relay of the high-voltage circuit negative electrode bus;
the safety detection device is used for monitoring the safety state of a high-voltage element and is respectively connected to a first voltage acquisition point positioned on a positive bus of the high-voltage circuit, a second voltage acquisition point positioned on a negative bus of the high-voltage circuit, a third voltage acquisition point positioned on a connecting line of a positive electrode of the charging interface and the charging positive relay, and a fourth voltage acquisition point positioned on a connecting line of a negative electrode of the charging interface and the charging negative relay through mutually independent voltage signal acquisition lines,
wherein the safety detection device is configured to be able to collect the voltage signals of the first voltage collection point, the second voltage collection point, the third voltage collection point, and the fourth voltage collection point via the voltage signal collection line, respectively, and compare the potential difference of the voltage signals obtained at the second voltage collection point and the third voltage collection point with a reference potential difference, and compare the potential difference of the voltage signals obtained at the first voltage collection point and the fourth voltage collection point with a reference potential difference, thereby determining the safety state of the charging positive relay and the charging negative relay, wherein the reference potential difference is the potential difference of the voltage signals of the first voltage collection point and the second voltage collection point.
2. The high voltage power distribution apparatus of claim 1, further comprising a consumer interface anode and a consumer interface cathode, the consumer interface anode being connected to the high voltage circuit anode bus via a high voltage fuse and a connecting wire, the consumer interface anode being connected to the high voltage circuit anode bus via a connecting wire;
the safety detection device is further connected to a fifth voltage acquisition point on a connecting line between the positive electrode of the electric equipment interface and the high-voltage fuse through the voltage signal acquisition line, and the safety detection device is further configured to be capable of acquiring a voltage signal obtained at the fifth voltage acquisition point through the voltage signal acquisition line and comparing a potential difference of the voltage signals at the second voltage acquisition point and the fifth voltage acquisition point with the reference potential difference to determine the fusing state of the high-voltage fuse.
3. The high voltage power distribution apparatus of claim 2, further comprising a plurality of powered device interfaces including some or all of a refrigeration device interface, a heating device interface, an on-board generator interface, and a dc transformation interface.
4. The high voltage power distribution apparatus of claim 1, wherein the safety detection apparatus is further configured to be able to communicate with an external controller of the electric vehicle via a CAN bus of the electric vehicle, so as to accept a signal request of the external controller to feed back a result of the comparison to the external controller via the CAN bus of the electric vehicle.
5. The high voltage power distribution apparatus of claim 2, further comprising a high voltage power distribution box, wherein the safety detection apparatus, the high voltage fuse, the positive charge relay, the negative charge relay, and the voltage signal collection line are all disposed within the high voltage power distribution box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920547660.XU CN210437018U (en) | 2019-04-22 | 2019-04-22 | High-voltage power distribution device for electric system of electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920547660.XU CN210437018U (en) | 2019-04-22 | 2019-04-22 | High-voltage power distribution device for electric system of electric vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN210437018U true CN210437018U (en) | 2020-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920547660.XU Active CN210437018U (en) | 2019-04-22 | 2019-04-22 | High-voltage power distribution device for electric system of electric vehicle |
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| CN (1) | CN210437018U (en) |
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- 2019-04-22 CN CN201920547660.XU patent/CN210437018U/en active Active
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