Vehicle insulation system

Abstract

The invention discloses a vehicle insulation system which is characterized in that a power supply casing wrapping a high-voltage power supply is arranged on the outer side of the high-voltage power supply of a vehicle, the power supply casing is connected with a cooling unit, a vehicle body is connected with a low-voltage power supply, and the low-voltage power supply supplies power to the cooling unit. The high-voltage power supply is electrically insulated from the power supply shell, the power supply shell is electrically insulated from the vehicle body, and the cooling unit is electrically insulated from the vehicle body; and the low-voltage power supply supplies power to the cooling unit in an isolated manner. According to the vehicle insulation system provided by the invention, the reliability of vehicle high-voltage power supply insulation can be enhanced, and the electric shock risk when people take the vehicle is reduced.

Description

Technical Field

[0001] The invention belongs to the field of power supply insulation, and in particular relates to a vehicle insulation system. Background Art

[0002] At present, the power supply voltage of vehicles using new energy sources is relatively high. If the insulation protection of the vehicle power supply is not done well, power leakage may occur. Passengers often touch the body of the vehicle during daily riding and use. If the high-voltage power supply leaks, the passengers will be in danger of electric shock if they touch the body. In addition, vehicle maintenance personnel will touch other vehicle parts directly connected to the high-voltage power supply. If the high-voltage power supply leaks, the maintenance personnel will be in danger of electric shock if they touch the vehicle parts.

[0003] In view of this, the present invention is proposed. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a vehicle insulation system which reduces the risk of electric shock to people and has high insulation reliability.

[0005] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions:

[0006] A vehicle insulation system, wherein a power supply casing enclosing the high-voltage power supply is provided on the outside of a high-voltage power supply of the vehicle, the power supply casing is connected to a cooling unit, the vehicle body is connected to a low-voltage power supply, the low-voltage power supply supplies power to the cooling unit, the high-voltage power supply and the power supply casing, the power supply casing and the vehicle body, and the cooling unit and the vehicle body are electrically insulated, and the low-voltage power supply supplies power to the cooling unit in isolation.

[0007] Preferably, the high-voltage power supply includes a high-voltage input terminal and a high-voltage output terminal, and the high-voltage input terminal and the high-voltage output terminal are electrically insulated from the power supply housing and secondarily insulated from the vehicle body.

[0008] Preferably, it also includes an insulation monitoring system, which performs insulation monitoring on the secondary insulation between the high-voltage power supply and the vehicle body.

[0009] Preferably, the insulation monitoring system includes an insulation detection unit, which detects the insulation resistance value of at least one point between the high-voltage input terminal and the power supply casing, the high-voltage output terminal and the power supply casing, the high-voltage input terminal and the vehicle body, the high-voltage output terminal and the vehicle body, and the power supply casing and the vehicle body.

[0010] Preferably, the insulation monitoring system comprises an insulation inspection unit, which performs cyclic detection on the insulation resistance value between the high voltage input terminal, the high voltage output terminal, the power supply housing and at least two locations in the vehicle body.

[0011] Preferably, the insulation monitoring system includes an insulation detection unit and an insulation inspection unit, and the insulation detection unit is connected to the insulation inspection unit to perform cyclic detection on the insulation resistance value between the high-voltage input end, the high-voltage output end, the power supply casing and at least two locations in the vehicle body.

[0012] Preferably, the insulation detection unit includes at least one insulation detector, each of which has two ports, one port is connected to the high-voltage input terminal, the high-voltage output terminal, the power supply casing and a place in the vehicle body, and the other port is connected to the insulation inspection unit.

[0013] Preferably, the insulation inspection unit includes at least one insulation inspection instrument, each of which has multiple ports, at least one port is connected to a high-voltage input terminal, a high-voltage output terminal, a power supply casing, and at least one place in the vehicle body, and at least one of the other ports is connected to the insulation detection unit.

[0014] Preferably, the insulation monitoring system sends the acquired monitoring data to an on-board controller, and the on-board controller processes the monitoring data to determine whether the insulation has failed.

[0015] Preferably, when the vehicle-mounted controller determines that the insulation has failed, it generates an alarm message and transmits the alarm message to the vehicle driver.

[0016] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art.

[0017] 1. The vehicle insulation system provided by the present invention can enhance the reliability of the insulation of the vehicle's high-voltage power supply and reduce the risk of electric shock when people are riding in the vehicle.

[0018] 2. The vehicle insulation system provided by the present invention can detect the insulation resistance value between the high-voltage input terminal, the high-voltage output terminal, the power supply housing and the vehicle body in real time and cycle, so as to avoid the risk of electric shock to the human body caused by insulation failure.

[0019] 3. The vehicle insulation system provided by the present invention can promptly report insulation failure to the driver after it is detected, thereby enhancing the reliability of the vehicle insulation system and minimizing the risk of electric shock to the human body.

[0020] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0022] Figure 1 Schematic diagram of the vehicle insulation system of the present invention.

[0023] like Figure 1 As shown, a high-voltage power supply 1, a power supply housing 2, a liquid cooling plate 3, a cooling unit 4, a low-voltage power supply 5, a vehicle body 6, and an insulation monitoring system 7.

[0024] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0026] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Embodiment 1

[0029] like Figure 1 As shown, the present invention provides a vehicle insulation system for insulating a vehicle-mounted high-voltage power supply 1 to prevent power leakage from causing electric shock to passengers when they come into contact with the vehicle body 6 while riding, thereby improving the safety of vehicle operation.

[0030] A power supply housing 2 wrapping the high-voltage power supply is provided on the outside of the high-voltage power supply 1, and the power supply housing 2 wraps the high-voltage power supply 1 and is fixed in the vehicle body 6. Since the high-voltage power supply 1 generates heat during the power supply process, a liquid cooling plate 3 is provided on the power supply housing 2 to cool the high-voltage power supply 1. The liquid cooling plate 3 is connected to the cooling unit 4 through two pipes, and the pipes are used for the cooling unit 4 to continuously pass circulating water into the liquid cooling plate 3 to cool the liquid cooling plate 3. Due to heat conduction, after the temperature of the liquid cooling plate 3 is reduced, the heat of the high-voltage power supply 1 and the power supply housing 2 will be conducted to the liquid cooling plate 3, so that the high-voltage power supply 1 and the power supply housing 2 dissipate heat.

[0031] A water pump is provided in the cooling unit 4 to provide power for the continuous circulation of water in the liquid cooling plate 3. The water pump needs power from a power source to work, so the cooling unit 4 is connected to a low-voltage power source 5, which provides power for the water pump to work. The vehicle body 6 is also connected to the low-voltage power source 5.

[0032] In order to improve the reliability of insulation protection for the vehicle-mounted high-voltage power supply 1, secondary insulation protection is required between the vehicle body 6 and the high-voltage power supply 1. The specific implementation method is: the high-voltage power supply 1 is electrically insulated from the power supply housing 2, and the power supply housing 2 is electrically insulated from the vehicle body 6, thereby achieving secondary insulation between the high-voltage power supply 1 and the vehicle body 6.

[0033] However, since the power supply housing 2 is connected to the cooling unit 4, electrical insulation must be achieved between the power supply housing 2 and the vehicle body 6, and the cooling unit 4 must also be electrically insulated from the vehicle body 6; the cooling unit 4 is connected to the output end of the low-voltage power supply 5, and the vehicle body 6 is connected to the input end of the low-voltage power supply 5, so electrical insulation must be achieved between the cooling unit 4 and the vehicle body 6, and electrical insulation must be achieved between the input end and the output end of the low-voltage power supply 5, and the low-voltage power supply 5 supplies isolated power to the cooling unit 4.

[0034] Since the high-voltage power supply 1 has an input end and an output end, electrical insulation must be achieved between the high-voltage power supply 1 and the power supply casing 2, and between the input end of the low-voltage power supply 5 and the power supply casing 2, the output end of the low-voltage power supply 5 and the power supply casing 2, and the input end and the output end of the low-voltage power supply 5 are all electrically insulated.

[0035] After secondary insulation is achieved between the high-voltage power supply 1 and the vehicle body 6, during the daily operation of the vehicle, if there is an insulation failure in one part of the system, there will be no danger of electric shock because there is still primary insulation, which improves the insulation reliability of the vehicle and greatly reduces the possibility of electric shock to users and passengers.

[0036] The vehicle insulation system also includes an insulation monitoring system 7, which performs insulation monitoring on the secondary insulation between the high-voltage power supply 1 and the vehicle body 6. Specifically, the insulation monitoring system 7 performs insulation monitoring on the high-voltage input terminal and the power supply housing 2, the high-voltage output terminal and the power supply housing 2, the high-voltage input terminal and the vehicle body 6, the high-voltage output terminal and the vehicle body 6, and the power supply housing 2 and the vehicle body 6.

[0037] Preferably, the insulation monitoring system 7 includes an insulation detection unit and an insulation inspection unit, the insulation detection unit is connected to the insulation inspection unit, and performs cyclic detection on the insulation resistance value between the high-voltage input end, the high-voltage output end, the power supply housing 2 and at least two locations in the vehicle body 6.

[0038] The insulation detection unit is provided with at least one insulation detector, each insulation detector has two ports; the insulation inspection unit is provided with at least one insulation inspection instrument, each insulation inspection instrument has a plurality of ports.

[0039] One port of each insulation tester is connected to a port of the insulation inspection meter, another port of the insulation tester is connected to one of the high-voltage input terminal, high-voltage output terminal, power supply housing 2 and vehicle body 6 in the vehicle insulation system, and other ports of the insulation inspection meter are connected to at least one of the high-voltage input terminal, high-voltage output terminal, power supply housing 2 and vehicle body 6 in the vehicle insulation system.

[0040] For example, the insulation detection unit is provided with an insulation detector, and the insulation inspection unit is provided with an insulation inspection detector; the insulation inspection detector has 4 ports, one of which is connected to a port of the insulation detector; this port can be connected to the other 3 ports to form a path, and can be connected to the other 3 ports in a certain order in a loop; another port of the insulation detector is connected to the power supply housing 2, and the other 3 ports of the insulation inspection detector are connected to the high-voltage input end, the high-voltage output end and the vehicle body 6 respectively; the insulation inspection detector is responsible for looping the high-voltage input end with the power supply housing 2, the high-voltage output end with the power supply housing 2, and the vehicle body 6 with the power supply housing, and the insulation detector is responsible for detecting the insulation resistance value between the high-voltage input end connected to the insulation inspection detector and the power supply housing 2, the high-voltage output end with the power supply housing 2, and the vehicle body 6 with the power supply housing 2. At this time, the insulation monitoring system 7 can realize the function of looping the insulation resistance value between the high-voltage input end and the power supply housing 2, the high-voltage output end and the power supply housing 2, and the vehicle body 6 and the power supply housing 2.

[0041] The insulation monitoring system 7 sends the acquired monitoring data to the on-board controller via CAN communication, and the on-board controller processes the monitoring data to determine whether the insulation fails.

[0042] When the on-board controller determines that the insulation has failed, it generates an alarm message and transmits the alarm message to the vehicle driver via voice and / or text.

[0043] Optionally, when the on-board controller determines that the insulation has failed, maintenance information is generated, and the maintenance information includes information about which two locations have failed insulation, for reference by maintenance personnel.

[0044] Embodiment 2

[0045] In this embodiment, the insulation monitoring system 7 includes an insulation detection unit, and the insulation detection unit is provided with a plurality of insulation detectors, each of which has two ports, each of which is connected to one place, for detecting the insulation condition between two places. Specifically, the two ends of the insulation detector are respectively connected to at least one of the high-voltage input end and the power supply housing 2, the high-voltage output end and the power supply housing 2, the high-voltage input end and the vehicle body 6, the high-voltage output end and the vehicle body 6, and the power supply housing 2 and the vehicle body 6, so as to detect the insulation resistance value of at least one place between the high-voltage input end and the power supply housing 2, the high-voltage output end and the power supply housing 2, the high-voltage input end and the vehicle body 6, the high-voltage output end and the vehicle body 6, and the power supply housing 2 and the vehicle body 6.

[0046] Optionally, the insulation detection unit is provided with two insulation detectors, and the two insulation detectors respectively detect the secondary insulation between the high voltage input terminal and the vehicle body 6, and between the high voltage output terminal and the vehicle body 6. However, this setting can only detect whether the secondary insulation between the high voltage power supply 1 and the vehicle body 6 fails, but cannot detect which two specific locations have insulation failure.

[0047] Optionally, the insulation detection unit is provided with three insulation detectors, which respectively detect the electrical insulation between the high voltage input terminal and the power supply housing 2, the high voltage output terminal and the power supply housing 2, and the power supply housing 2 and the vehicle body 6. With this configuration, the power supply housing 2 needs to be connected to multiple lines at the same time, and multiple insulation detectors need to work at the same time.

[0048] Embodiment 3

[0049] In this embodiment, the insulation monitoring system 7 includes an insulation inspection unit, which is provided with an insulation inspection instrument. The insulation inspection instrument has multiple ports and can be connected to multiple locations simultaneously. Channels are formed between the multiple locations, and the insulation inspection instrument performs cyclic detection in each channel.

[0050] Specifically, the ports of the insulation inspection instrument are respectively connected to the high-voltage input terminal, the high-voltage output terminal, the power housing 2 and at least two of the vehicle body 6, and the insulation resistance values ​​between the high-voltage input terminal and the power housing 2, the high-voltage output terminal and the power housing 2, the high-voltage input terminal and the vehicle body 6, the high-voltage output terminal and the vehicle body 6, and at least one between the power housing 2 and the vehicle body 6 are cyclically detected.

[0051] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art.

[0052] 1. The vehicle insulation system provided by the present invention can enhance the reliability of the insulation of the vehicle's high-voltage power supply and reduce the risk of electric shock when people are riding in the vehicle.

[0053] 2. The vehicle insulation system provided by the present invention can detect the insulation resistance value between the high-voltage input terminal, the high-voltage output terminal, the power supply housing and the vehicle body in real time and cycle, so as to avoid the risk of electric shock to the human body caused by insulation failure.

[0054] 3. The vehicle insulation system provided by the present invention can promptly report insulation failure to the driver after it is detected, thereby enhancing the reliability of the vehicle insulation system and minimizing the risk of electric shock to the human body.

[0055] The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content suggested above without departing from the scope of the technical solution of the present invention. The implementation scheme in the above embodiment can also be further combined or replaced. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the solution of the present invention.

Claims

1. A vehicle insulation system, wherein a power supply housing enclosing the high-voltage power supply is provided on the outside of the high-voltage power supply of the vehicle, the power supply housing is connected to a cooling unit, and the vehicle body is connected to a low-voltage power supply, and the low-voltage power supply supplies power to the cooling unit, characterized in that: The high voltage power supply is electrically insulated from the power supply housing, from the power supply housing to the vehicle body, and from the cooling unit to the vehicle body, and the low voltage power supply provides isolated power to the cooling unit.

2. The vehicle insulation system according to claim 1, characterized in that The high-voltage power supply comprises a high-voltage input terminal and a high-voltage output terminal, wherein the high-voltage input terminal and the high-voltage output terminal are electrically insulated from a power supply housing and are secondarily insulated from a vehicle body.

3. The vehicle insulation system according to claim 2, characterized in that The device also includes an insulation monitoring system, which performs insulation monitoring on secondary insulation between a high voltage power supply and a vehicle body.

4. The vehicle insulation system according to claim 3, characterized in that The insulation monitoring system includes an insulation detection unit, which detects the insulation resistance value of at least one point between the high voltage input terminal and the power supply housing, the high voltage output terminal and the power supply housing, the high voltage input terminal and the vehicle body, the high voltage output terminal and the vehicle body, and the power supply housing and the vehicle body.

5. The vehicle insulation system according to claim 3, characterized in that The insulation monitoring system comprises an insulation inspection unit, which performs cyclic detection on the insulation resistance value between the high voltage input end, the high voltage output end, the power supply housing and at least two locations in the vehicle body.

6. The vehicle insulation system according to claim 3, characterized in that The insulation monitoring system includes an insulation detection unit and an insulation inspection unit. The insulation detection unit is connected to the insulation inspection unit to perform cyclic detection on the insulation resistance value between the high-voltage input end, the high-voltage output end, the power supply housing and at least two locations in the vehicle body.

7. The vehicle insulation system according to claim 6, characterized in that The insulation detection unit includes at least one insulation detector, each of which has two ports, one port is connected to a high voltage input terminal, a high voltage output terminal, a power supply housing and a place in the vehicle body, and the other port is connected to the insulation inspection unit.

8. The vehicle insulation system according to claim 6, characterized in that The insulation inspection unit includes at least one insulation inspection instrument, each of which has multiple ports, at least one port is connected to a high-voltage input end, a high-voltage output end, a power supply housing, and at least one of the vehicle body, and at least one of the other ports is connected to the insulation detection unit.

9. The vehicle insulation system according to claim 3, characterized in that The insulation monitoring system sends the acquired monitoring data to the on-board controller, and the on-board controller processes the monitoring data to determine whether the insulation fails.

10. The vehicle insulation system according to claim 9, characterized in that When the on-board controller determines that the insulation fails, it generates an alarm message and transmits the alarm message to the vehicle driver.

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