Direct current charging pile system with copper bar temperature monitoring function

Abstract

The utility model relates to a direct-current charging pile system with a copper bar temperature monitoring function. The direct-current charging pile system comprises a charging pile, a charging gun, a wireless temperature measurement sensor, a transceiver and a temperature measurement acquisition display device, according to the utility model, through the wireless temperature measurement sensors installed on the copper bars at the alternating current side and the direct current side of the charging pile, when an automobile is charged, real-time temperature monitoring is carried out on the charging interface part, and signals are sent to the temperature measurement acquisition display device through the transceiver in a wireless communication mode; the temperature abnormal condition of the copper bar during charging can be conveniently found in time, communication with a charging controller of the charging pile can be achieved, the risk occurrence probability is reduced by alarming, stopping charging or reducing power operation, and the problem that an existing charging pile cannot find and process the temperature abnormal condition in time is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of charging piles, and in particular to a DC charging pile system with copper busbar temperature monitoring. Background Art

[0002] With the development of the new energy industry, charging pile products have also seen rapid growth. Charging piles often carry high voltages and currents on both the AC and DC sides during operation. Consequently, monitoring the temperature of the charging pile's input and output copper busbars to provide over-temperature alarms has emerged. However, most existing charging piles lack this feature, making it inconvenient for users to monitor the temperature of the busbars and preventing them from detecting temperature anomalies in a timely manner.

[0003] Car charging piles contain a large number of copper busbars carrying high voltages and high currents. During the charging process, these busbars heat up, degrading their mechanical properties and making the joints unreliable, posing a risk of fire and explosion. Conventional temperature sensors, if directly connected to the busbars, are unable to withstand the high voltages and currents. Existing solutions use PT1000 thermistor temperature sensors connected via cables to monitor the busbars. However, these sensors require a cable connection, limiting the space inside the charging pile and making it impossible to monitor all the required test points on the busbars. Consequently, the temperature measurement range is limited, leaving room for improvement. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a DC charging pile system with copper busbar temperature monitoring to solve the above-mentioned problems.

[0005] The purpose of this utility model is achieved in this way:

[0006] A DC charging pile system with copper busbar temperature monitoring includes a DC charging pile cabinet, which is equipped with a molded case circuit breaker, an AC contactor, a DC contactor, a data transceiver, and a charging pile controller. A temperature measurement, collection, and display device is provided on the front door of the DC charging pile cabinet. An AC contactor is provided on one side of the molded case circuit breaker, and the charging pile controller is provided above the molded case circuit breaker and the AC contactor. A data transceiver is provided above the charging pile controller, and a DC contactor is provided above the data transceiver.

[0007] Three AC incoming copper bars are bridged between the molded case circuit breaker and the AC contactor, and each AC incoming copper bar is equipped with a wireless temperature sensor; the positive and negative DC outgoing copper bars bridged between the DC contactor and the charging output side are each equipped with a wireless temperature sensor; and the three AC incoming copper bars between the molded case circuit breaker and the AC contactor are each equipped with a current transformer;

[0008] The wireless temperature sensor sends a signal to the data transceiver, the data transceiver and the electrical parameter acquisition are connected to the temperature acquisition and display device, the temperature acquisition and display device is connected to the charging pile controller, the charging pile controller is connected to the touch screen of the DC charging pile, and the touch screen is connected to the host computer.

[0009] Furthermore, the wireless temperature sensor is fixed to the copper busbar by bolts.

[0010] Furthermore, the current transformer is fastened to the copper busbar using a bracket, and the current transformer is used to monitor the AC incoming current measurement when the DC charging pile is running.

[0011] Furthermore, the data transceiver is installed in a guide rail manner inside the cabinet of the DC charging pile, and takes a DC24V DC power supply from the charging pile control circuit for receiving and sending temperature data.

[0012] Furthermore, the temperature measurement, collection and display device is embedded in the front door of the DC charging pile cabinet, takes AC220V AC power from the charging pile control circuit, communicates with the charging pile controller in real time, and is used to display the monitored temperatures of each channel and issue a real-time alarm when the temperature is over-temperature.

[0013] Furthermore, the temperature measurement, collection and display device is provided with a DI input port and a DO relay output port.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The utility model provides a DC charging pile system with copper busbar temperature monitoring. By means of wireless temperature measuring sensors installed on the copper busbars on the AC and DC sides of the charging pile, the temperature of the charging interface is monitored in real time when the car is charging. The signal is sent to a temperature measurement acquisition and display device via a transceiver in a wireless communication manner, so that abnormal temperature of the copper busbar during charging can be detected in time. The system can communicate with the charging controller of the charging pile, and the probability of risk occurrence can be reduced by giving an alarm, stopping charging or reducing power operation. The utility model solves the problem that the existing charging pile does not have the function of copper busbar temperature monitoring, relies on the inconvenience of user inspection, and cannot detect and handle abnormal temperature in time.

[0016] At the same time, the utility model adopts a wireless temperature sensor solution to realize wireless temperature measurement inside the pile, and a maximum of 60 copper bus monitoring sampling points can be arranged, with a wide temperature measurement range of -30~150℃; it has the ability to locate the fault branch; the utility model has a two-stage alarm value function, and can set high temperature alarm and ultra-high temperature alarm values; the utility model adopts 485 bus and standard Modbus-RTU protocol for data interaction between devices, which is convenient for communication and integration with other systems; the temperature measurement and acquisition display device of the utility model is equipped with DI input port and DO relay output port, which is convenient for linkage with other auxiliary equipment outside the pile, and has external expansion capability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the internal structure of the utility model.

[0018] Figure 2 It is the main view of the utility model.

[0019] Figure 3 This is a schematic diagram of the logic principle of the present utility model.

[0020] in:

[0021] Molded case circuit breaker 1, AC contactor 2, wireless temperature sensor 3, DC contactor 4, temperature measurement and acquisition display device 5, data transceiver 6, current transformer 7, charging pile controller 8. DETAILED DESCRIPTION

[0022] To better understand the technical solution of the present invention, the following detailed description is provided with reference to the relevant illustrations. It should be understood that the following specific embodiments are not intended to limit the specific implementation of the technical solution of the present invention; they are merely examples of possible implementations of the technical solution of the present invention. It should be noted that the description herein of the positional relationships of the various components, such as component A being located above component B, is based on the relative positions of the components in the illustrations and is not intended to limit the actual positional relationships of the components. Example 1

[0023] See also Figure 1-Figure 3 , Figure 1 A schematic diagram of the internal structure of the present invention is provided. As shown in the figure, the present invention relates to a DC charging pile system with copper busbar temperature monitoring, which includes a DC charging pile cabinet, which is equipped with a molded case circuit breaker 1, an AC contactor 2, a DC contactor 4, a data transceiver 6, and a charging pile controller 8. A temperature measurement and display device 5 is provided on the front door of the DC charging pile cabinet.

[0024] An AC contactor 2 is provided on one side of the molded case circuit breaker 1 , a charging pile controller 8 is provided above the molded case circuit breaker 1 and the AC contactor 2 , a data transceiver 6 is provided above the charging pile controller 8 , and a DC contactor 4 is provided above the data transceiver 6 .

[0025] Three AC incoming copper bars are bridged between the molded case circuit breaker 1 and the AC contactor 2. Each AC incoming copper bar is provided with a wireless temperature sensor 3, which is fixed to the copper bar with bolts to monitor the AC side temperature when the DC charging pile is running.

[0026] A wireless temperature sensor 3 is provided on each of the positive and negative DC output copper bars bridging the DC contactor 4 and the charging output side. The wireless temperature sensor 3 is fixed to the copper bar with bolts to monitor the DC side temperature during operation of the DC charging pile.

[0027] A current transformer 7 is provided on each of the three AC incoming copper buses between the molded case circuit breaker 1 and the AC contactor 2. The current transformer 7 is fastened to the copper bus with a bracket. The current transformer 7 is used to monitor the AC incoming current measurement when the DC charging pile is running; voltage sampling is performed on each of the three AC incoming copper buses between the molded case circuit breaker 1 and the AC contactor 2 to monitor the AC incoming voltage measurement when the DC charging pile is running.

[0028] The data transceiver 6 is installed in the cabinet of the DC charging pile in a guide rail manner, and takes a DC24V DC power supply from the charging pile control circuit for receiving and sending temperature data.

[0029] The temperature measurement, collection and display device 5 is embedded in the front door of the DC charging pile cabinet, takes AC220V AC power from the charging pile control circuit, communicates with the charging pile controller 08 in real time, and is used to display the monitored temperatures of each channel and issue an alarm in real time when the temperature is over.

[0030] See also Figure 3 , Figure 3 A schematic diagram of the logic principle of the present invention is drawn. As shown in the figure, the wireless temperature sensor 3 sends a signal to the data transceiver 6. The data transceiver 6 and the electrical parameter acquisition are connected to the temperature acquisition and display device 5. The temperature acquisition and display device 5 is connected to the charging pile controller 8. The charging pile controller 8 is connected to the touch screen of the DC charging pile, and the touch screen is connected to the host computer.

[0031] The utility model uses a wireless temperature measurement sensor installed in the charging pile to monitor the temperature of the copper busbars on the AC input side and the DC output side in real time when charging the car, and sends the signal wirelessly to the temperature measurement and acquisition display device, and performs alarm monitoring on the screen, so as to facilitate timely detection of abnormal temperature conditions in the charging pile during charging, reduce the probability of risk occurrence, and be more reliable than inspection by users.

[0032] The charging pile of the present invention has a DC electric parameter acquisition function. By acquiring the electric parameters on the AC side of the charging pile, the voltage, current, active power, reactive power and electric energy on the AC incoming line side of the charging pile can be monitored.

[0033] The utility model adopts a passive temperature sensor, which does not need to rely on batteries or other external power sources during the temperature signal acquisition process, and has a longer service life. In addition, it improves production efficiency and reduces cable costs.

[0034] The temperature measurement, collection and display device of the present invention is provided with a DI input port and a DO relay output port, and has external expansion capability.

[0035] Real-time data exchange is carried out between the wireless temperature measurement and collection display device and the charging pile controller. When the temperature of the copper busbar in the charging pile is abnormal, the output power of the charging pile can be reduced, and charging can be stopped in an emergency.

[0036] Working principle:

[0037] The utility model relates to a DC charging pile system with copper busbar temperature monitoring, which has the following three technical functions and technical solutions:

[0038] (1) Wireless temperature measurement; it includes: wireless temperature measurement sensor; it is installed on the AC incoming copper busbar and DC outgoing copper busbar by bolts. According to the measured temperature data, when the temperature value is higher than the high temperature alarm value, it is sent wirelessly via the transceiver to the temperature measurement acquisition and display device.

[0039] (2) Charging power regulation: It includes: temperature measurement, collection and display device, and charging controller; the two communicate data through RS485 bus and Modbus-RTU protocol. When a high temperature fault occurs in the copper busbar, charging can be stopped or the charging power can be reduced. At the same time, the fan and human-machine interface in the charging pile can be linked to warn and pre-process the high temperature fault in the charging pile.

[0040] (3) AC side electrical parameter acquisition function; it includes current transformers and fuses; it collects voltage and current data at the AC input of the DC charging pile, calculates active power, reactive power, and electric energy, and then displays them on the display device.

[0041] The above are only specific application examples of the present invention and do not constitute any limitation on the scope of protection of the present invention. Any technical solution formed by equivalent transformation or equivalent replacement shall fall within the scope of protection of the present invention.

Claims

1. A DC charging pile system with copper busbar temperature monitoring, characterized by: It comprises a DC charging pile cabinet, in which a molded case circuit breaker (1), an AC contactor (2), a DC contactor (4), a data transceiver (6) and a charging pile controller (8) are arranged, and a temperature measurement, collection and display device (5) is provided on the front door of the DC charging pile cabinet; the AC contactor (2) is provided on one side of the molded case circuit breaker (1), the charging pile controller (8) is provided above the molded case circuit breaker (1) and the AC contactor (2), the data transceiver (6) is provided above the charging pile controller (8), and the DC contactor (4) is provided above the data transceiver (6); Three AC incoming copper bars are bridged between the molded case circuit breaker (1) and the AC contactor (2), and each AC incoming copper bar is provided with a wireless temperature sensor (3); a wireless temperature sensor (3) is provided on each of the positive and negative DC outgoing copper bars bridged between the DC contactor (4) and the charging output side; and a current transformer (7) is provided on each of the three AC incoming copper bars between the molded case circuit breaker (1) and the AC contactor (2); The wireless temperature sensor (3) sends a signal to the data transceiver (6), the data transceiver (6) and the electrical parameter acquisition are connected to the temperature acquisition display device (5), the temperature acquisition display device (5) is connected to the charging pile controller (8), the charging pile controller (8) is connected to the touch screen of the DC charging pile, and the touch screen is connected to the host computer.

2. A DC charging pile system with copper busbar temperature monitoring according to claim 1, characterized in that: The wireless temperature sensor (3) is fixed on the copper busbar by means of bolts.

3. A DC charging pile system with copper busbar temperature monitoring according to claim 1, characterized in that: The current transformer (7) is fixedly mounted on the copper busbar using a bracket, and the current transformer (7) is used to monitor the AC incoming current measurement when the DC charging pile is in operation.

4. A DC charging pile system with copper busbar temperature monitoring according to claim 1, characterized in that: The data transceiver (6) is installed in a guide rail manner inside the cabinet of the DC charging pile, and takes a DC24V DC power supply from the charging pile control circuit for receiving and sending temperature data.

5. The DC charging pile system with copper busbar temperature monitoring according to claim 1, characterized in that: The temperature measurement, collection and display device (5) is embedded in the front door of the DC charging pile cabinet, takes AC220V AC power from the charging pile control circuit, and communicates with the charging pile controller (8) in real time to display the monitored temperatures of each channel and issue a real-time alarm when the temperature is over-temperature.

6. A DC charging pile system with copper busbar temperature monitoring according to claim 1, characterized in that: The temperature measurement, collection and display device (5) is provided with a DI input port and a DO relay output port.

Images