CN210416254U

CN210416254U - Charging seat temperature rise active protection detection device

Info

Publication number: CN210416254U
Application number: CN201920706249.2U
Authority: CN
Inventors: 椤炬芳; 顾淼
Original assignee: Nolead Shanghai Automotive Technology Co Ltd
Current assignee: Nolead Shanghai Automotive Technology Co Ltd
Priority date: 2019-05-17
Filing date: 2019-05-17
Publication date: 2020-04-28
Anticipated expiration: 2029-05-17

Abstract

The utility model discloses a charging seat temperature rise initiative protection detection device, including the socket that charges, the high-pressure connector of socket that charges is connected with temperature sensor, and temperature sensor passes through the low voltage cable and connects low voltage relay's control end, and low voltage relay's switch end is established ties to the high-pressure loop interlocking return circuit of whole car. The novel in design, based on the temperature sensor's of charging seat characteristic, the function of using the closure of relay and opening circuit has designed the charging seat initiative and has carried out the temperature rise protection, has increased the intelligent design of charging seat, has avoided the possibility to personal safety and vehicle damage, and suggestion navigating mate's effect is simple and easy convenient, and the practicality is excellent, does benefit to popularization and use.

Description

Charging seat temperature rise active protection detection device

Technical Field

The utility model relates to a new energy automobile technical field, in particular to charging seat temperature risees initiative protection detection device.

Background

With the rapid development of new energy vehicle technology, the high-voltage safety problem of the vehicle-mounted charging seat is attracted wide attention; compared with the traditional vehicle, the new energy electric vehicle has the advantages that the charging seat is an input carrier of the energy of the new energy electric vehicle, but the potential risk of fire due to high current and high voltage and temperature rise exists in the charging process; therefore, the temperature of the charging seat is detected and the high-voltage power supply is timely disconnected, the temperature is controlled to rise by stopping charging and discharging, and the problem becomes one of the high-voltage safety problems most concerned by users.

The charging seat on the existing market does not have the detection that high-voltage charging seat initiatively requested disconnection high-voltage charging and discharging, and when the electric motor car in charging process, because of some reason, and lead to the temperature to rise, the controller of whole car so can detect the information that the temperature rises through the temperature sensor of charging seat, when the risk value that the temperature rises, whole car controller can send the outage request and give BMS (battery management system), then BMS can break off the relay in high-voltage loop to realize stopping charging process.

The prior art has the disadvantage that the power-off request is sent to the BMS after the determination of the vehicle controller, so that a 500ms delay is required, and the temperature value of the actual charging seat is delayed, thereby increasing the risk of fire due to the fact that the charging seat delays to send an accurate temperature value because the temperature is increased. The high-voltage charging seat is over-high in temperature, so that the charging seat is directly damaged and ablated, the insulation fault of the whole vehicle is caused, and even the serious accident of burning the vehicle is caused in serious conditions.

In view of the above, there is a need for an active protection detecting device for detecting a temperature rise of a charging dock to solve the deficiencies of the prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a charging seat temperature risees initiative protection detection device, the modern design, at charging seat high temperature, the initiative is sent high-voltage power-off request to reduce the potential safety hazard that arouses because of the temperature rise, ensure the safe in utilization of charging seat, solve prior art's defect.

In order to achieve the above purpose, the technical solution of the present invention is as follows:

the utility model provides a charging seat temperature rise initiative protection detection device, is connected with temperature sensor including the socket that charges, the high-voltage connector of socket that charges, and temperature sensor passes through the control end of low-voltage cable connection low-voltage relay, and low-voltage relay's switch end establishes ties to the high-voltage loop interlocking return circuit of whole car.

Further, the temperature sensor adopts a PT1000 temperature sensor.

Further, the control end of the low-voltage relay is connected with a low-voltage connector.

Furthermore, the high-voltage loop interlocking loop is respectively connected with a battery management module, a power distribution module, a vehicle-mounted charger and a single chip microcomputer.

Further, the battery management module transmits signals to an instrument panel or a central display screen through a CAN bus.

The utility model has the advantages that: the novel in design, based on the temperature sensor's of charging seat characteristic, the function of using the closure of relay and opening circuit has designed the charging seat initiative and has carried out the temperature rise protection, has increased the intelligent design of charging seat, has avoided the possibility to personal safety and vehicle damage, and suggestion navigating mate's effect is simple and easy convenient, and practicality is excellent, does benefit to popularization and use.

Drawings

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments:

FIG. 1 is a view of the structure of the present invention;

FIG. 2 is a view of the structure of a charging socket;

figure 100-charging receptacle; 110-a temperature sensor; 120-low voltage cable; 130-low voltage relay, 140-low voltage connector, 150-high voltage loop interlocking loop, 160-battery management module, 170-power distribution module, 180-vehicle charger, 190-single chip microcomputer.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.

As shown in fig. 1 and fig. 2, an active protection and detection device for the rise of the temperature of a charging dock comprises a charging dock 100, wherein a temperature sensor 110 is connected to a high-voltage connector of the charging dock 100, and the temperature sensor 110 is a PT1000 temperature sensor. The temperature sensor 110 is connected with the control end of the low-voltage relay 130 through the low-voltage cable 120, and the switch end of the low-voltage relay 130 is connected in series to the high-voltage loop interlocking loop 150 of the whole vehicle. In the connectors of the high-voltage system, a high-voltage loop interlocking loop 150, namely HVIL, is designed, that is, when the HVIL is disconnected, positive and negative relays of the high-voltage battery are actively disconnected, and the whole vehicle high-voltage power supply system is disconnected. The utility model discloses concatenate low-voltage relay 130 to the HVIL return circuit in, and temperature sensor (PTC) is received to low-voltage relay 130's control end. The resistance value of the temperature sensor (PTC) rises along with the rise of the temperature, so that the current of the control end continuously drops, when the current controlled by the temperature sensor is smaller than the closing continuous current of the relay, the HVIL is disconnected, and then the positive and negative relays of the high-voltage battery of the whole vehicle are disconnected. The logic realizes the active temperature rise protection of the high-voltage charging seat and actively sends out a high-voltage power-off request. Therefore, potential safety hazards caused by temperature rise are reduced, the use safety of the charging seat is ensured, and the high-voltage loop interlocking loop 150 is respectively connected with the battery management module 160, the power distribution module 170, the vehicle-mounted charger 180 and the single chip microcomputer 190. The battery management module 160 transmits signals to the dashboard or central display screen via the CAN bus.

The control end of the low-voltage relay 130 is connected with a low-voltage connector 140, namely a low-voltage 12V power supply of the whole vehicle.

The temperature sensor PT1000 is placed between the positive and negative terminals of the high-voltage charging socket connector, a low-voltage wire led out from the PT1000 is connected to the control end of the low-voltage relay, when the temperature value is smaller than 150 ℃, the current of the control end is 150mA at the minimum, so that the switch end of the low-voltage relay can be kept closed, when the temperature is larger than 150 ℃, the current of the control end is smaller than 150mA, so that the switch end of the low-voltage relay is disconnected, an HVIL loop is disconnected, the BMS receives a loop signal of HVIL disconnection, and finally the high-voltage system of the whole vehicle is disconnected. And simultaneously, the BMS transmits signals to the instrument panel through the CAN bus so as to prompt a driver that the vehicle charging system has a fault signal.

The method comprises the following concrete steps:

the first step, choose for use 1 output interface's temperature sensor PT1000 to place between the positive negative terminal of high pressure charging socket connector, the low pressure wire that PT1000 draws forth is connected to the control end of relay, and another termination of relay is put in order the low pressure 12V power of car.

And secondly, connecting the switch end of the relay in series to the charging HVIL of the whole vehicle, and realizing the on-off of the switch end of the relay through the change of the resistance value of the temperature sensor at the control end (the resistance value changes along with the change of the temperature).

And thirdly, when a charging gun is inserted and a charging request is sent out, when the temperature of a charging terminal is 150 ℃, a switch end of a relay is closed, namely a VHIL loop is closed, and the BMS realizes a charging function.

And fourthly, when the temperature of the charging terminal rises and reaches 150 ℃, the resistance value of the temperature sensor also rises, so that the current of the control end of the relay is lower than 150mA, the switching end of the relay is disconnected with the HVIL loop, the BMS simultaneously disconnects the charging relay of the high-voltage loop, namely, the whole vehicle stops charging, and the central display screen on the CAN network of the vehicle body CAN display the abnormity of the charging system.

The utility model discloses an integrate the product, detect the temperature variation of charging seat terminal based on temperature sensor, use the switch function of relay to combine the HVIL loop characteristic of whole car, connect the relay in series in the HVIL return circuit. When the temperature of the charging seat rises to a risk value, the resistance value change of the temperature sensor is applied to realize the disconnection of the relay, finally the timely and accurate HVIL disconnection and the whole vehicle high-voltage charging function are realized, the early warning treatment on the temperature rise of the whole vehicle can be realized, a driver is timely reminded to cut off the high voltage, the fault is eliminated, and the loss of personnel and property is avoided. The whole vehicle control module realizes the calculation of the plugging times, thereby achieving the calculation of the service life and the safety warning. The vehicle control module transmits signals to a dashboard or a central display screen through a CAN bus so as to provide the health state of driving relative to the charging seat.

The high-voltage charging seat has a temperature detection function, the relay is added to be connected in series with the high-voltage HVIL loop, and the HVIL loop connected in series with the relay can be disconnected in time after the temperature rises, so that the high-voltage charging is disconnected in time, the delay of the existing detection temperature is overcome, and the fire risk caused by overhigh temperature rise is greatly reduced.

It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a charging seat temperature rise initiative protection detection device, includes the socket that charges, and the high voltage connector of socket that charges is connected with temperature sensor, its characterized in that: the temperature sensor is connected with the control end of the low-voltage relay through a low-voltage cable, and the switch end of the low-voltage relay is connected in series with a high-voltage loop interlocking loop of the whole vehicle.

2. The active protection detection device for the temperature rise of the charging seat as claimed in claim 1, wherein: the temperature sensor adopts a PT1000 temperature sensor.

3. The active protection detection device for the temperature rise of the charging seat as claimed in claim 1, wherein: and the control end of the low-voltage relay is connected with the low-voltage connector.

4. The active protection detection device for the temperature rise of the charging seat as claimed in claim 1, wherein: the high-voltage loop interlocking loop is respectively connected with a battery management module, a power distribution module, a vehicle-mounted charger and a single chip microcomputer.

5. The active protection detection device for the temperature rise of the charging seat as claimed in claim 4, wherein: and the battery management module transmits a signal to an instrument panel or a central display screen through a CAN bus.