Circuit device for breaking positive electrode of high-voltage loop for electric automobile
By designing circuit devices for the positive electrode of high-voltage circuit in electric vehicles, and using multiple relays and sensors to achieve multiple protection and real-time monitoring of high-voltage circuits, the problem of difficult high-voltage electrical box relays in the prior art is solved, and the safety and space utilization of high-voltage electrical box in electric vehicles is improved.
Patent Information
- Application Number
- CN202420606869.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-26
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-03-26
AI Technical Summary
In the prior art, the relays of the high-voltage electrical box in electric vehicles are difficult to break the circuit from the positive end, and cannot effectively protect the high-voltage circuit. At the same time, the high-integration high-voltage electrical box is inconvenient to be arranged inside the battery pack, the space utilization rate is low, and the working status of the high-voltage components cannot be monitored in real time, and risks cannot be identified in advance to make early warnings.
Design a circuit device for breaking the positive electrode of the high-voltage circuit for electric vehicles. By setting up multiple relays to protect the high-voltage circuit from the positive electrode, and setting up high-voltage acquisition modules, sensors, etc. on the control motherboard to monitor the internal environment of the battery pack in real time and warn of risks.
Through multiple relay protection, the operation safety of high-voltage electrical boxes in electric vehicles is improved, the high-voltage components are arranged reasonably, the integration of circuit devices is improved, the battery pack environment is monitored in real time, and risks are warned, ensuring the operational safety of circuit devices and battery packs is ensured.
Smart Images
Figure CN222756428U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of new energy vehicles, in particular to a circuit device for disconnecting a positive pole of a high-voltage circuit of an electric vehicle. Background Art
[0002] With the rapid development of new energy vehicles, the requirements for the disconnecting function of the relays in the high-voltage electrical boxes of electric vehicles are getting higher and higher. In the existing technology, there are few methods to complete the circuit disconnection from the positive end to achieve the purpose of protecting the high-voltage circuit; at the same time, the highly integrated high-voltage electrical boxes facilitate the internal layout of the battery pack in the electric vehicle and improve the space utilization rate; and the real-time working status of high-voltage components such as relays in the high-voltage electrical boxes cannot be fully monitored, and risks cannot be identified in advance to issue warnings. Utility Model Content
[0003] In order to overcome the above technical problems, the utility model provides a circuit device for disconnecting the positive pole of a high-voltage circuit for an electric vehicle. The circuit device can provide multiple protections for the high-voltage circuit from the positive end by setting up multiple relays, thereby improving the operating safety of the high-voltage electrical box in the electric vehicle.
[0004] In order to achieve the above-mentioned object, the utility model provides, on one hand, a circuit device for disconnecting the positive pole of a high-voltage circuit of an electric vehicle, comprising:
[0005] A total positive relay, one end of which is connected to the positive terminal of an external battery pack, and the other end of which is connected to the positive terminal of an external load;
[0006] A pre-charging relay, one end of which is connected to one end of the total positive relay;
[0007] A pre-charging resistor, one end of which is connected to the other end of the pre-charging relay, and the other end of which is connected to the other end of the total positive relay;
[0008] A charging positive relay, one end of which is connected to one end of the pre-charging relay;
[0009] A heating positive relay, one end of which is connected to one end of the charging positive relay;
[0010] A heating positive fuse, one end of which is connected to the other end of the heating positive relay.
[0011] Preferably, the circuit device includes a control mainboard, the control mainboard includes a high-voltage acquisition module, the B+ port of the high-voltage acquisition module is connected to one end of the total positive relay, the V1+ port of the high-voltage acquisition module is connected to the other end of the total positive relay, the V2+ port of the high-voltage acquisition module is connected to the other end of the pre-charging relay, the V3+ port of the high-voltage acquisition module is connected to the other end of the charging positive relay, and the V4+ port of the high-voltage acquisition module is connected to the other end of the heating positive fuse.
[0012] Preferably, the circuit device further comprises a main housing, the total positive relay and the charging positive relay are arranged on both sides of the interior of the main housing, and the pre-charging resistor is arranged in the middle of the interior of the main housing;
[0013] The pre-charging positive relay and the heating positive relay are arranged on the top of the pre-charging resistor, the heating positive fuse is arranged on one side of the heating positive relay, and the control main board is arranged on the top of the heating positive relay.
[0014] Preferably, the circuit device further comprises two relay support plates, which are respectively arranged at the bottom of the main positive relay and the charging positive relay and connected to the main housing.
[0015] Preferably, the circuit device further comprises an upper cover plate, which is arranged on the top of the control main board and connected to the main housing.
[0016] Preferably, the circuit device further comprises a protective cover, which is arranged above the upper cover plate and connected to the main housing.
[0017] Preferably, the control main board includes two thermistors, and the two thermistors are respectively arranged on one side of the main positive relay and the charging positive relay.
[0018] Preferably, the control mainboard also includes a temperature sensor.
[0019] Preferably, the control mainboard also includes a humidity sensor.
[0020] Preferably, the control mainboard also includes a light sensor and a smoke sensor.
[0021] Through the above technical solution, the circuit device is equipped with multiple relays to control the direction and size of current, completes multiple protections for the high-voltage circuit from the positive end, reasonably arranges the positions of high-voltage components such as relays, improves the integration of the circuit device, and simultaneously arranges multiple sensors to monitor the internal environment of the battery pack in real time, warns of risks, and ensures the operating safety of the circuit device and the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a circuit connection diagram of a circuit device for disconnecting the positive pole of a high-voltage circuit for an electric vehicle according to one embodiment of the utility model;
[0023] Figure 2 It is a schematic diagram of a control mainboard of a circuit device for disconnecting the positive pole of a high-voltage circuit for an electric vehicle according to one embodiment of the utility model;
[0024] Figure 3 It is a schematic diagram of the structure explosion of a circuit device for disconnecting the positive pole of a high-voltage circuit for an electric vehicle according to one embodiment of the utility model.
[0025] Description of Reference Numerals
[0026] 1. Total positive relay 2. Pre-charge relay
[0027] 3. Pre-charge resistor 4. Charging positive relay
[0028] 5. Heating positive relay 6. Heating positive fuse
[0029] 7. Control main board 8. Main housing
[0030] 9. Relay support plate 10. Upper cover
[0031] 11. Protective cover 12. Thermal sensor
[0032] 13. Temperature sensor 14. Humidity sensor
[0033] 15. Smoke sensor 16. Light sensor
[0034] 17. High voltage acquisition module DETAILED DESCRIPTION
[0035] The specific implementation of the embodiment of the utility model is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the utility model, and is not used to limit the embodiment of the utility model.
[0036] In the embodiments of the present invention, unless otherwise specified, directional words such as "up, down, top, bottom" are usually used with reference to the directions shown in the drawings or are used to describe the relative positional relationships of components in the vertical, perpendicular or gravity direction.
[0037] In addition, if there are descriptions involving "first", "second", etc. in the implementation of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various implementations can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0038] like Figure 1 The figure is a circuit connection diagram of a circuit device for disconnecting the positive pole of a high voltage circuit for an electric vehicle according to an embodiment of the utility model. Figure 1 In the circuit device, the circuit device includes a total positive relay 1, a pre-charging relay 2, a pre-charging resistor 3, a charging positive relay 4, a heating positive relay 5, and a heating positive fuse 6; specifically, one end of the total positive relay 1 can be connected to the positive end of an external battery pack, and the other end of the total positive relay 1 can be connected to the positive end of an external load, one end of the pre-charging relay 2 can be connected to one end of the total positive relay 1, one end of the pre-charging resistor 3 can be connected to the other end of the pre-charging relay 2, and the other end of the pre-charging resistor 3 can be connected to the other end of the total positive relay 1, one end of the charging positive relay 4 can be connected to one end of the pre-charging relay 2, one end of the heating positive relay 5 can be connected to one end of the charging positive relay 4, and one end of the heating positive fuse 6 can be connected to the other end of the heating positive relay 5.
[0039] The circuit device can provide multiple protections for the high-voltage circuit from the positive end by arranging multiple relays, and arranging a heating positive fuse to protect the heating positive relay in the circuit, thereby improving the safety of the high-voltage circuit operation in the electric vehicle.
[0040] like Figure 2 The figure is a schematic diagram of a control mainboard of a circuit device for disconnecting the positive pole of a high voltage circuit for an electric vehicle according to an embodiment of the utility model. Figure 2In order to control the operation of the relay, monitor the working state of high-voltage components such as the relay, and warn of risks, in one embodiment of the utility model, the circuit device may include a control mainboard 7, and the control mainboard 7 may include a high-voltage acquisition module 17 for collecting voltage information of the high-voltage components. The connection mode between the high-voltage acquisition module 17 and the total positive relay 1, the pre-charge relay 2, the pre-charge resistor 3, the charging positive relay 4, the heating positive relay 5, and the heating positive fuse 6 may be various known to those skilled in the art. The B+ port of the high-voltage acquisition module 17 may be connected to one end of the total positive relay 1, the V1+ port of the high-voltage acquisition module 17 may be connected to the other end of the total positive relay 1, the V2+ port of the high-voltage acquisition module 17 may be connected to the other end of the pre-charge relay 2, the V3+ port of the high-voltage acquisition module 17 may be connected to the other end of the charging positive relay 4, and the V4+ port of the high-voltage acquisition module 17 may be connected to the other end of the heating positive fuse 6. Through the above connection relationship, the high-voltage acquisition module 17 can complete the collection of voltage information of high-voltage components, and complete the monitoring of the working state of high-voltage components such as relays through the control mainboard 7, and warn of risks.
[0041] like Figure 3 1 is a schematic diagram of an exploded structure of a circuit device for disconnecting the positive pole of a high-voltage circuit for an electric vehicle according to an embodiment of the present utility model. Figure 3 In order to improve the integration of the high-voltage electrical box, improve the maintenance efficiency and space utilization, the arrangement positions of high-voltage components such as relays should be reasonably set. In one embodiment of the utility model, the circuit device may also include a main housing 8. The positions of the total positive relay 1, the pre-charging relay 2, the pre-charging resistor 3, the charging positive relay 4, the heating positive relay 5, and the heating positive fuse 6 in the main housing 8 can be various positions known to those skilled in the art. The total positive relay 1 and the charging positive relay 4 can be respectively arranged on both sides of the interior of the main housing 8, and the pre-charging resistor 3 can be arranged in the middle of the interior of the main housing 8; the pre-charging positive relay 2 and the heating positive relay 5 can be arranged on the top of the pre-charging resistor 3, the heating positive fuse 6 can be arranged on one side of the heating positive relay 5, and the control main board 7 can be arranged on the top of the heating positive relay 5. Through the above-mentioned position arrangement, modular arrangement of these high-voltage components can not only reduce the space occupancy and reduce the volume, but also make maintenance easier and reduce maintenance costs.
[0042] exist Figure 3 In order to enhance the safety of the circuit device and ensure the safety of maintenance personnel, in one embodiment of the utility model, the circuit device may further include two relay trays 9, which may be respectively arranged at the bottom of the main positive relay 1 and the charging positive relay 4, to electrically isolate the main positive relay 1 and the charging positive relay 4, thereby improving the safety of the device, and the relay tray 9 may be connected to the main housing by a snap fastener for easy disassembly.
[0043] exist Figure 3 In order to protect the high-voltage components in the circuit device, prevent foreign objects from falling into the device, and prevent maintenance personnel from accidentally touching it, in one embodiment of the utility model, the circuit device may also include an upper cover plate 10, which can be arranged on the top of the control main board 7 to isolate the high-voltage components, and the upper cover plate 10 can be connected to the main shell 8 by a snap buckle for easy disassembly.
[0044] exist Figure 3 In order to protect the high-voltage components in the circuit device and prevent dust and water from falling into the device, corroding the high-voltage components and causing circuit failures, in one embodiment of the utility model, the circuit device may further include a protective cover 11. The protective cover 11 may be disposed above the upper cover plate 10 to seal the entire device and improve the safety of the device operation. The protective cover 11 may be connected to the main shell 8 by a snap fastener for easy disassembly.
[0045] exist Figure 3 In order to monitor the health status of the main positive relay 1 and the charging relay 4 in real time and improve the safety of the main positive relay 1 and the charging relay 4, in one embodiment of the utility model, two thermistors 11 may be provided on the control main board 7. The positions of the two thermistors 11 may be various as known to those skilled in the art. The thermistors 11 may be provided on one side of the main positive relay 1 and the charging positive relay 4. The thermistors 11 help prevent potential failures and damages by monitoring temperature changes.
[0046] exist Figure 3 In order to monitor the health status of the battery pack in real time and improve the safety of the battery pack operation, in one embodiment of the utility model, a temperature sensor 13 is provided on the control main board 7. The temperature sensor 13 detects the temperature inside the battery pack in real time to improve the reliability and safety of the battery pack.
[0047] exist Figure 3 In order to monitor the health status of the battery pack in real time and improve the safety of the battery pack operation, in one embodiment of the utility model, a humidity sensor 14 is provided on the control main board 7. The humidity sensor 14 can measure and monitor the humidity level inside the battery pack to ensure the stability and reliability of the device, thereby improving the life of the device.
[0048] exist Figure 3In order to monitor the health status of the battery pack in real time, avoid the combustion of combustibles to produce toxic gases, and improve the safety of the battery pack operation, in one embodiment of the utility model, a light sensor 16 and a smoke sensor 15 are provided on the control main board 7. The light sensor 16 can monitor the light intensity in the battery pack in real time to avoid failure of high-voltage components and combustion to produce sparks or sparks, and provide early warning; the smoke sensor 16 can monitor the smoke situation in the battery pack in real time to avoid the combustion of high-voltage components to produce toxic smoke, so as to improve the safety of the battery pack and protect personnel safety.
[0049] Through the above technical solution, the circuit device is equipped with multiple relays to control the direction and size of current, completes multiple protections for the high-voltage circuit from the positive end, reasonably arranges the positions of high-voltage components such as relays, improves the integration of the circuit device, and simultaneously arranges multiple sensors to monitor the internal environment of the battery pack in real time, warns of risks, and ensures the operating safety of the circuit device and the battery pack.
[0050] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the present invention. It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.
[0051] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.
Claims
1. A circuit device for disconnecting the positive pole of a high-voltage circuit for an electric vehicle, characterized in that: include: A total positive relay, one end of which is connected to the positive terminal of an external battery pack, and the other end of which is connected to the positive terminal of an external load; A pre-charging relay, one end of which is connected to one end of the total positive relay; A pre-charging resistor, one end of which is connected to the other end of the pre-charging relay, and the other end of which is connected to the other end of the total positive relay; A charging positive relay, one end of which is connected to one end of the pre-charging relay; A heating positive relay, one end of which is connected to one end of the charging positive relay; A heating positive fuse, one end of which is connected to the other end of the heating positive relay; A control mainboard, the control mainboard includes a high-voltage acquisition module and two thermistors, the B+ port of the high-voltage acquisition module is connected to one end of the total positive relay, the V1+ port of the high-voltage acquisition module is connected to the other end of the total positive relay, the V2+ port of the high-voltage acquisition module is connected to the other end of the pre-charging relay, the V3+ port of the high-voltage acquisition module is connected to the other end of the charging positive relay, the V4+ port of the high-voltage acquisition module is connected to the other end of the heating positive fuse, and the two thermistors are respectively arranged on one side of the total positive relay and the charging positive relay.
2. The circuit arrangement according to claim 1, characterized in that The circuit device further comprises a main housing, the main positive relay and the charging positive relay are arranged on both sides of the interior of the main housing, and the pre-charging resistor is arranged in the middle of the interior of the main housing; The pre-charging relay and the heating positive relay are arranged on the top of the pre-charging resistor, the heating positive fuse is arranged on one side of the heating positive relay, and the control main board is arranged on the top of the heating positive relay.
3. The circuit arrangement according to claim 2, characterized in that The circuit device also includes two relay support plates, which are respectively arranged at the bottom of the total positive relay and the charging positive relay and connected to the main housing.
4. The circuit arrangement according to claim 2, characterized in that The circuit device further comprises an upper cover plate, which is arranged on the top of the control main board and connected to the main housing.
5. The circuit arrangement according to claim 4, characterized in that The circuit device also includes a protective cover, which is arranged above the upper cover plate and connected to the main housing.
6. The circuit arrangement according to claim 2, characterized in that The control mainboard also includes a temperature sensor.
7. The circuit arrangement according to claim 2, characterized in that The control main board also includes a humidity sensor.
8. The circuit arrangement according to claim 2, characterized in that The control mainboard also includes a light sensor and a smoke sensor.