CN213023459U - New energy automobile high-voltage relay state detection system - Google Patents
New energy automobile high-voltage relay state detection system Download PDFInfo
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- CN213023459U CN213023459U CN202021004029.4U CN202021004029U CN213023459U CN 213023459 U CN213023459 U CN 213023459U CN 202021004029 U CN202021004029 U CN 202021004029U CN 213023459 U CN213023459 U CN 213023459U
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Abstract
The utility model discloses a new energy automobile high-voltage relay state detection system, including current sensor, power module, whole car state detection module, main control unit, the positive pole of power module draws forth on the binding post mounting point of binding post setting high-voltage relay, the binding post mounting point is when high-voltage relay's normally open contact is in the disconnection state armature tip of high-voltage relay locates the position; a connection wire is led out between the connection wires between the high-voltage relay and the load and is connected to the negative electrode of the power supply module; the current sensor is used for detecting a current signal on a loop between the negative electrode of the power supply and the high-voltage relay, and the output end of the current sensor is connected with the main controller; the whole vehicle state detection module is used for detecting the power-on and power-off states of the whole vehicle, and the output end of the whole vehicle state detection module is connected with the main controller; the output end of the main controller is connected with the reminding module. The scheme realizes the detection of the state through a simple circuit, has simple structure and is quick and convenient to detect; the newly added hardware has low cost and is safe and reliable.
Description
Technical Field
The utility model relates to an electric automobile safety inspection field, in particular to new energy automobile high-voltage relay state detecting system.
Background
In the new energy automobile industry, a high-voltage power distribution cabinet safely and effectively manages the working state of a high-voltage relay, and relates to the safety of high-voltage power on and off of a whole automobile; in the actual operation in-process, when the short circuit became invalid when spare part load appears, perhaps whole car control sequence is unreasonable, can produce the heavy current on the power line and lead to the relay adhesion, under the condition of relay adhesion, high pressure direct connection to load end, because there is not reasonable detection and trouble warning, the incident is caused easily to latent hidden danger, in order to avoid causing unnecessary potential safety hazard, must detect the state of relay. If the vehicle has a relay adhesion fault, but the system cannot detect the relay state, the pre-charging loop fails, and large-current impact occurs in the loop; if the relay adhesion occurs in the state that the system is working, the system can not be disconnected after receiving a disconnection signal, and the system can not be normally powered off and needs to be maintained if the system is light; and if so, the battery can not be disconnected in time when encountering a collision accident, so that personnel get an electric shock or the overall thermal runaway risk of the battery is increased.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a high-voltage relay state detection system which is used for realizing the detection of the safety state of a high-voltage relay of a vehicle and further realizing the reminding of whether the high-voltage relay is adhered or not, such as alarming, indicating and the like.
In order to achieve the purpose, the invention adopts the technical scheme that: a new energy automobile high-voltage relay state detection system comprises a current sensor, a power module, a whole automobile state detection module and a main controller, wherein a connection terminal is led out of the positive electrode of the power module and is arranged on a connection terminal installation point of a high-voltage relay, and the connection terminal installation point is the position where the armature end of the high-voltage relay is located when a normally open contact of the high-voltage relay is in a disconnected state; a connection wire is led out between the connection wires between the high-voltage relay and the load and is connected to the negative electrode of the power supply module; the current sensor is used for detecting a current signal on a loop between the negative electrode of the power supply and the high-voltage relay, and the output end of the current sensor is connected with the main controller; the whole vehicle state detection module is used for detecting the power-on and power-off states of the whole vehicle, and the output end of the whole vehicle state detection module is connected with the main controller; the output end of the main controller is connected with the reminding module.
The power module comprises a storage battery and a resistor R.
And a relay for detection and control is arranged in a loop from the anode of the power supply module to the cathode of the power supply module in series, and the control end of the relay for detection and control is connected with the main controller.
The high-voltage relay comprises a main positive relay and a main negative relay which are used for controlling the power battery.
The reminding module comprises a sound reminding module and/or a display reminding module.
The reminding module is a vehicle-mounted instrument and/or a vehicle-mounted display screen.
The utility model has the advantages that: the state detection can be realized through a simple circuit, the structure is simple, and the detection is rapid and convenient; the newly added hardware has low cost and is safe and reliable.
Drawings
The contents of the expressions in the various figures of the present specification and the labels in the figures are briefly described as follows:
fig. 1 is a schematic circuit diagram of the detection system of the present invention.
Detailed Description
The following description of preferred embodiments of the invention will be made in further detail with reference to the accompanying drawings.
The application provides a new energy automobile high voltage relay state detecting system for whether there is adhesion abnormal state in the detection electric automobile high voltage relay, can further give simultaneously and remind. The detection system comprises a 12v small storage battery, a current limiting resistor R, a current sensor, a main controller, a reminding module and a vehicle state detection module.
As shown in fig. 1, taking a main positive relay and a main negative relay of a power battery of an electric vehicle as an example, the power supply structure principle includes: a positive leading-out wire of the 12V storage battery is led out through a resistor R to form two wiring terminals which are respectively arranged on a mounting point of a main positive relay and a mounting point of a main negative relay, the mounting point of the main positive relay is a position where the armature end of the main negative relay is located when a normally open contact of the main positive relay is in a disconnected state, and the armature is communicated with the wiring terminals on the mounting point in a contact manner when the normally open contact of the main positive relay is in the disconnected state; the mounting point of the main negative relay is the position of the armature end of the main negative relay when the normally open contact of the main negative relay is in a disconnected state, and the armature is communicated with the wiring terminal on the mounting point in a contact manner when the normally open contact of the main negative relay is in the disconnected state; the circuit structure of the main positive relay and the main negative relay on the electric automobile is characterized in that the positive pole and the negative pole of a power battery are respectively connected with the positive pole of a vehicle-mounted load through the normally open contact of the main positive relay and the normally open contact of the main negative relay, and are connected with the negative pole of the vehicle-mounted load through the normally open contact of the main negative relay. A connection wire is led out of a circuit between the main positive relay and the vehicle-mounted load, passes through the relay for detection and control and then is connected with the negative electrode of the 12V storage battery; and a connection wire is led out of a circuit between the main negative relay and the vehicle-mounted load, passes through the relay for detection and control and then is connected with the negative electrode of the 12V storage battery. Detecting a current signal between the main positive relay and the detection control relay through a current sensor a, and detecting a current signal between the main negative relay and the detection control relay through a current sensor b; the output ends of the current sensor a and the current sensor b are connected with the main controller; the input end of the main controller is connected with the vehicle state detection module; the output end of the main controller is connected with the reminding module. Detection points a, b may be provided, and then current at points a, b may be detected by the sensors, where the detection point a is provided on the main positive relay output side (the side connected to the vehicle-mounted load) and the detection point b is provided on the main negative relay output side (the side connected to the vehicle-mounted load).
The 12V small storage battery can adopt a vehicle-mounted storage battery or convert the vehicle-mounted storage battery into a 12V power supply through DCDC conversion to provide a detection power supply. The current limiting resistor R is used to reduce the current magnitude in the detection loop. The main controller mainly realizes the judgment of the whole adhesion state and outputs a control reminding signal. The main controller can be realized by a VCU (vehicle control unit), and can be integrated in the VCU. The vehicle state detection module mainly detects an up-down electric signal, and CAN acquire a corresponding signal by reading an instruction on the CAN bus or acquire the signal by communicating with the engine controller and the vehicle controller. The whole vehicle state detection module is used for detecting the power-on and power-off states of the whole vehicle, and the output end of the whole vehicle state detection module is connected with the main controller; the output end of the main controller is connected with a reminding module, and the reminding module is mainly used for carrying out state reminding on the detected adhesion state. The relay for detection control mainly controls whether the relay is started or not to realize whether the adhesion state is detected or not. The reminding module comprises a sound reminding module and/or a display reminding module. The reminding module is a vehicle-mounted instrument and/or a vehicle-mounted display screen. The indicating lamp on the instrument is used for adhesion detection reminding or reminding through a vehicle-mounted display screen.
The working principle of the application is as follows: the power-on and power-off state of the whole vehicle is compared with the actual detection state, if the power-on and power-off state of the whole vehicle is not matched with the actual detection state, the adhesion fault is determined, and at the moment, the main controller (the VCU of the whole vehicle controller gives an alarm prompt through the driving instrument). Taking the whole vehicle power-off as an example, when the whole vehicle is in a power-off state, the current is detected at the detection point a, the main positive relay is judged to be normal, if no current is detected at the point a, the main positive relay is judged to be an adhesion fault, and at the moment, the automobile instrument or the display is driven to give a prompt. Similarly, when the whole vehicle is in a power-off state, if the detection point b has current, the main and negative relays are judged to be normal; if no current exists in the detection point b, the main and negative relays are judged to be in adhesion fault, and at the moment, the vehicle controller drives the instrument or the vehicle-mounted display screen to give a prompt. When the whole vehicle is powered off, the principle is the same, the relay state is compared under the power-off state, and the states of the main negative relay and the main positive relay are judged according to the existence of current at the detection points a and b. Whether the adhesion fault exists is judged by comparing the power-on and power-off states of the whole vehicle.
The specific working principle is as follows:
1. the state of the corresponding relay is detected by a low-voltage circuit (a 12v circuit formed by connecting the positive electrode of the storage battery to the negative electrode through a resistor R, a terminal, a detection relay and the like). When the relay adhesion detection loop is not communicated, the vehicle controller can judge whether the abnormal working condition of the relay state occurs to the vehicle according to the working state of the vehicle.
2. Control relationships between variables
3. The vehicle controller controls the on-off state of a detection relay in a detection loop to start adhesion state detection, and judges whether the abnormal working condition of the state of the relay exists or not according to the working state of the vehicle by receiving loop on-off information detected by a current sensor;
the current sensor collects and uploads the current state of a detection point, the vehicle control unit judges whether a relay state abnormal working condition exists or not, and an abnormal point position is sent;
4. the detailed principle is as follows:
a. main positive relay state detection
The vehicle controller closes the relay to supply power to the detection loop, and the current at the detection point a is in two states of current 1 and no current 2.
When the state of the monitoring point a is 1, the relay A is in a disconnected state;
when the state of the monitoring point a is 2, the relay A is in a closed state, and the vehicle controller judges whether the relay state of the vehicle is abnormal or not according to the working state of the vehicle and the relay state of the monitoring point.
And if the vehicle is in the power-off state of the whole vehicle and the state of the monitoring point a is '1', judging that the state of the relay A is abnormal and adhered.
b. Adhesion detection of main and negative relays
The vehicle control unit closes the detection relay to supply power to the detection loop, and the current at the detection point b is in two states of current 1 and no current 2.
When the state of the monitoring point B is 1, the relay B is in a disconnected state;
when the state of the monitoring point B is 2, the relay B is in a closed state, and the vehicle controller judges whether the relay state of the vehicle is abnormal or not according to the working state of the vehicle and the relay state of the monitoring point.
It is clear that the specific implementation of the invention is not restricted to the above-described embodiments, but that various insubstantial modifications of the inventive process concept and technical solutions are within the scope of protection of the invention.
Claims (6)
1. The utility model provides a new energy automobile high voltage relay state detecting system which characterized in that: the high-voltage relay comprises a current sensor, a power supply module, a whole vehicle state detection module and a main controller, wherein a positive leading-out wiring terminal of the power supply module is arranged on a wiring terminal mounting point of the high-voltage relay, and the wiring terminal mounting point is the position of the armature end of the high-voltage relay when a normally open contact of the high-voltage relay is in a disconnected state; a connection wire is led out between the connection wires between the high-voltage relay and the load and is connected to the negative electrode of the power supply module; the current sensor is used for detecting a current signal on a loop between the negative electrode of the power supply and the high-voltage relay, and the output end of the current sensor is connected with the main controller; the whole vehicle state detection module is used for detecting the power-on and power-off states of the whole vehicle, and the output end of the whole vehicle state detection module is connected with the main controller; the output end of the main controller is connected with the reminding module.
2. The system for detecting the state of the high-voltage relay of the new energy automobile as claimed in claim 1, characterized in that: the power module comprises a storage battery and a resistor R.
3. The new energy automobile high-voltage relay state detection system as claimed in claim 1 or 2, characterized in that: and a relay for detection and control is arranged in a loop from the anode of the power supply module to the cathode of the power supply module in series, and the control end of the relay for detection and control is connected with the main controller.
4. The new energy automobile high-voltage relay state detection system as claimed in claim 1 or 2, characterized in that: the high-voltage relay comprises a main positive relay and a main negative relay which are used for controlling the power battery.
5. The new energy automobile high-voltage relay state detection system as claimed in claim 1 or 2, characterized in that: the reminding module comprises a sound reminding module and/or a display reminding module.
6. The new energy automobile high-voltage relay state detection system as claimed in claim 1 or 2, characterized in that: the reminding module is a vehicle-mounted instrument and/or a vehicle-mounted display screen.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021004029.4U CN213023459U (en) | 2020-06-04 | 2020-06-04 | New energy automobile high-voltage relay state detection system |
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| CN202021004029.4U CN213023459U (en) | 2020-06-04 | 2020-06-04 | New energy automobile high-voltage relay state detection system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113655378A (en) * | 2021-07-20 | 2021-11-16 | 湖州学院 | Method for detecting adhesion fault of new energy battery electric vehicle relay |
| CN114114017A (en) * | 2021-12-24 | 2022-03-01 | 广州巨湾技研有限公司 | Method, device and system for testing power-down logic of battery management system |
-
2020
- 2020-06-04 CN CN202021004029.4U patent/CN213023459U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113655378A (en) * | 2021-07-20 | 2021-11-16 | 湖州学院 | Method for detecting adhesion fault of new energy battery electric vehicle relay |
| CN113655378B (en) * | 2021-07-20 | 2024-04-05 | 湖州学院 | Method for detecting adhesion fault of relay of new energy battery electric vehicle |
| CN114114017A (en) * | 2021-12-24 | 2022-03-01 | 广州巨湾技研有限公司 | Method, device and system for testing power-down logic of battery management system |
| CN114114017B (en) * | 2021-12-24 | 2024-04-02 | 广州巨湾技研有限公司 | Method, device and system for testing power-down logic of battery management system |
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| TR01 | Transfer of patent right |
Effective date of registration: 20230412 Address after: Floor 18, Building 13, Science and Technology Industrial Park, No. 717 Zhongshan South Road, Wuhu High tech Industrial Development Zone, Yijiang District, Wuhu City, Anhui Province, 241000 Patentee after: Wuhu Tairui Automobile Co.,Ltd. Address before: 241000 Building 8, science and Technology Industrial Park, 717 Zhongshan South Road, Yijiang District, Wuhu City, Anhui Province Patentee before: Chery Commercial Vehicles (Anhui) Co., Ltd. |
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