Heat dissipation device for direct current charger and direct current charger

Abstract

A heat dissipation device for a direct current charger comprises a signal acquisition mechanism, a heat dissipation mechanism and a control mechanism. The heat dissipation mechanism comprises a first heat dissipation module, a second heat dissipation module, a first alternating current contactor and a second alternating current contactor, the first heat dissipation module comprises a first heat dissipation fan assembly and a second heat dissipation fan assembly, and the second heat dissipation module comprises a third heat dissipation fan assembly and a fourth heat dissipation fan assembly; the first alternating current contactor is used for controlling the first cooling fan assembly and the third cooling fan assembly to be turned on or turned off, and the second alternating current contactor is used for controlling the second cooling fan assembly and the fourth cooling fan assembly to be turned on or turned off. The signal acquisition mechanism is used for acquiring the temperature of a charging module of the direct-current charger; and the control mechanism controls one of the first alternating current contactor and the second alternating current contactor to be in an open state and the other to be in a closed state. The problem that a heat dissipation mechanism is damaged due to the fact that the number of fans is large and starting impact current is too large is effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of DC charger heat dissipation, in particular to a heat dissipation device and a DC charger for a DC charger. Background Technique

[0002] Due to the large power of the DC charger during operation, heat is easily generated. If the inside of the DC charger is in a high-temperature state for a long time, it will affect the service life of the DC charger and the charging safety of electric vehicles. Especially in hot summer, the sun exposure outdoors causes the temperature inside the DC charger to rise sharply. Therefore, multiple cooling fans are arranged inside the existing DC charger for heat dissipation.

[0003] The common control method of the cooling fan is that the control system directly controls the fan startup with the control port, or the control system controls the on-off of the intermediate relay coil through the control port, and the intermediate relay controls the cooling fan. The load capacity of the control port of the control system and the intermediate relay is limited. The more the number of cooling fans, the greater the startup current generated by starting the cooling fan. After multiple uses, it is easy to cause damage to the control port or the intermediate relay, resulting in the failure of the cooling fan.

[0004] Therefore, in the prior art, the cooling fan reduces energy consumption through staged control. For example, Figure 2 As shown, when the number of DC charger cooling fans is large, the DC charger operates at low power. When the temperature reaches the fan startup preset value, all the cooling fans start, and the temperature is reduced below the preset value in a short time. Then the cooling fans stop running, the temperature rises to the preset value again, and the cooling fans restart, repeating in a cycle. Frequently controlling the start and stop of the cooling fans in a short time is easy to damage the control components. Summary of the Utility Model

[0005] In order to solve the deficiencies of the prior art, the utility model provides a heat dissipation device and a DC charger for a DC charger, which are not easy to damage the control components and save electric energy at the same time.

[0006] The technical solution adopted by the utility model to solve the above technical problems is: a heat dissipation device for a DC charger, including a signal acquisition mechanism, a heat dissipation mechanism and a control mechanism;

[0007] The heat dissipation mechanism includes a first heat dissipation module, a second heat dissipation module, a first AC contactor and a second AC contactor. The first heat dissipation module includes a first heat dissipation fan assembly and a second heat dissipation fan assembly. The second heat dissipation module includes a third heat dissipation fan assembly and a fourth heat dissipation fan assembly. The first AC contactor is used to control the opening or closing of the first heat dissipation fan assembly and the third heat dissipation fan assembly. The second AC contactor is used to control the opening or closing of the second heat dissipation fan assembly and the fourth heat dissipation fan assembly;

[0008] The signal acquisition mechanism is used to obtain the temperature of the charging module of the DC charger.

[0009] The control mechanism is used to control one of the first AC contactor and the second AC contactor to be in the on state and the other to be in the off state according to the temperature obtained by the signal acquisition mechanism.

[0010] As a further optimization of a heat dissipation device for a DC charger in the utility model: The control mechanism is provided with a temperature detection interface and a control interface. The temperature detection interface is used to connect to the signal acquisition mechanism, and the control interface is used to connect to the control mechanism.

[0011] As a further optimization of a heat dissipation device for a DC charger in the utility model: The signal acquisition mechanism includes a plurality of temperature sensors. The temperature sensors are arranged at the air outlet, control board and copper bar of the charging module of the DC charger, and all the temperature sensors are connected to the temperature detection interface.

[0012] As a further optimization of a heat dissipation device for a DC charger in the utility model: The control mechanism is provided with an Ethernet communication module, and the Ethernet communication module is connected to the main control module of the DC charger.

[0013] The technical solution adopted by the utility model to solve the above technical problems is: A DC charger includes a main control module, a charging module and the above heat dissipation device. The heat dissipation device is used to dissipate heat from the charging module, and the main control module is electrically connected to the control mechanism.

[0014] As a further optimization of a DC charger in the utility model: The main control module is connected to a serial communication module. The serial communication module includes a 232 communication module, a 485 communication module and a CAN communication module. The 232 communication module is connected to the human-machine interaction module of the DC charger, the 485 communication module is connected to the DC ammeter of the DC charger, and the CAN communication module is connected to the charging module of the DC charger and the power system of the vehicle.

[0015] As a further optimization of a DC charger in the utility model: The DC charger is provided with a heating mechanism, and the control mechanism controls the opening or closing of the heating mechanism according to the temperature obtained by the signal acquisition mechanism.

[0016] As a further optimization of a DC charger in the utility model: The DC charger is provided with a humidity sensor and a water immersion detection sensor, and both the humidity sensor and the water immersion detection sensor are connected to the main control module of the DC charger.

[0017] As a further optimization of a DC charger in the utility model: The DC charger is provided with a smoke sensor, and the smoke sensor is connected to the main control module of the DC charger.

[0018] As a further optimization of a utility model for a DC charger: The DC charger is provided with a tipping detection sensor, and the tipping detection sensor is connected to the main control module of the DC charger.

[0019] Beneficial effects: The first AC contactor of the present utility model is used to control the on or off of the first heat dissipation fan assembly and the third heat dissipation fan assembly, and the second AC contactor is used to control the on or off of the second heat dissipation fan assembly and the fourth heat dissipation fan assembly. The control mechanism is used to control one of the first AC contactor and the second AC contactor to be in the on state and the other to be in the off state according to the temperature obtained by the signal acquisition mechanism. It effectively improves the problem that the large number of fans and excessive starting impact current cause damage to the heat dissipation mechanism; through grouped cross-control, when one device is damaged, the others can still operate normally, effectively improving the problem of device damage and paralysis of the heat dissipation mechanism. Description of the Drawings

[0020] Figure 1 is the framework diagram of the present utility model;

[0021] Figure 2 is the schematic diagram of the prior art;

[0022] Figure 3 is the control schematic diagram of the present utility model. Specific Embodiments

[0023] The following further elaborates on the technical solutions of the present utility model in combination with specific embodiments. For the parts not detailedly recorded and disclosed in the following embodiments of the present utility model, they should all be understood as the prior art known or should be known to those skilled in the art, such as the model of the DC charger, etc.

[0024] Embodiment 1

[0025] A heat dissipation device for a DC charger, as Figure 1 and Figure 3As shown in the figure, it includes a signal acquisition mechanism, a heat dissipation mechanism and a control mechanism; the heat dissipation mechanism includes a first heat dissipation module, a second heat dissipation module, a first AC contactor and a second AC contactor. The first heat dissipation module includes a first heat dissipation fan assembly and a second heat dissipation fan assembly, and the second heat dissipation module includes a third heat dissipation fan assembly and a fourth heat dissipation fan assembly. The first AC contactor is used to control the on or off of the first heat dissipation fan assembly and the third heat dissipation fan assembly, and the second AC contactor is used to control the on or off of the second heat dissipation fan assembly and the fourth heat dissipation fan assembly. How the control mechanism controls the first AC contactor and the second AC contactor is conventional technology in the art and will not be elaborated here; the signal acquisition mechanism is used to obtain the temperature of the charging module of the DC charger; the control mechanism is used to control one of the first AC contactor and the second AC contactor to be in the on state and the other to be in the off state according to the temperature obtained by the signal acquisition mechanism. The connection between the signal acquisition mechanism and the control mechanism is conventional technology in the art and will not be elaborated here.

[0026] The AC power supply interfaces L and N provide power for the heat dissipation mechanism and the control mechanism. The control mechanism controls the on and off of the coils of the first AC contactor and the second AC contactor through control port 1 and control port 2. The first AC contactor and the second AC contactor control the first heat dissipation module and the second heat dissipation module. The first heat dissipation fan assembly, the second heat dissipation fan assembly, the third heat dissipation fan assembly and the fourth heat dissipation fan assembly are located in different positions and there are a large number of them. Cross control is adopted for their control. The first AC contactor controls the first heat dissipation fan assembly and the third heat dissipation fan assembly, and the second AC contactor controls the second heat dissipation fan assembly and the fourth heat dissipation fan assembly. When a certain group or several groups of the first heat dissipation fan assembly, the second heat dissipation fan assembly, the third heat dissipation fan assembly or the fourth heat dissipation fan assembly fail, there is still a group that can be controlled by the first AC contactor or the second AC contactor to ensure the normal operation of this group, improving the stability and reliability during the charging process.

[0027] The first heat dissipation fan assembly consists of Figure 3 Fan 1, Fan 3, Fan 5, Fan 7 and Fan 9 in the position A heat dissipation fans in the figure, and the second heat dissipation fan assembly consists of Figure 3 Fan 2, Fan 4, Fan 6 and Fan 8 in the position A in the figure, and the third heat dissipation fan assembly consists of Figure 3 Fan 2, Fan 4, Fan 6 and Fan 8 in the position B heat dissipation fans in the figure, and the fourth heat dissipation fan assembly consists of Figure 3 Fan 1, Fan 3, Fan 5, Fan 7 and Fan 9 in the position B heat dissipation fans in the figure.

[0028] The DC charger further includes a charging mechanism. During the operation of the charging mechanism, the signal acquisition mechanism collects the temperature at the air outlet of the charging module. When the temperature reaches the preset value, the control mechanism controls the heat dissipation mechanism to start. The start preset values of the first heat dissipation module and the second heat dissipation module in the heat dissipation fan are divided into stage one and stage two. When the control mechanism detects through the signal acquisition mechanism that the temperature reaches the first stage of the start preset values of the first heat dissipation module and the second heat dissipation module, the control mechanism controls the first AC contactor to act through control port 1. At this time, as Figure 3 shown, the fans 1, 3, 5, 7, and 9 at position A start, and the fans 2, 4, 6, and 8 at position B start. When the temperature is maintained between the preset values of stage one and stage two, the first AC contactor continuously controls the operation of the first heat dissipation fan assembly and the third heat dissipation fan assembly; when the temperature is lower than the first stage of the preset value, the control mechanism controls port 1 to control the first AC contactor to disconnect, and the first heat dissipation fan assembly and the third heat dissipation fan assembly stop operating; when the temperature continues to rise and reaches the preset value of stage two, the control mechanism controls the second AC contactor to act through control port 2, and the fans 2, 4, 6, and 8 at position A start, and the fans 1, 3, 5, 7, and 9 at position B start. By controlling the first heat dissipation module and the second heat dissipation module in a phased manner, it is possible to avoid the frequent full start and stop of the first heat dissipation module and the second heat dissipation module, and effectively reduce the equipment noise and power loss.

[0029] When there are more heat dissipation fans and more distribution positions in the heat dissipation mechanism, the number and specifications of the AC contactors can be adjusted on the basis of the present invention, and the cross-control of the multi-position heat dissipation fans and the multi-stage control of the heat dissipation fans can be adjusted.

[0030] The present invention takes the control mechanism as the core and monitors the entire charging process in real time through the signal acquisition mechanism. The temperature inside the cabinet is detected through the signal acquisition mechanism, and the start and stop of the first heat dissipation module and the second heat dissipation module are controlled by the control mechanism through control port 1 and control port 2.

[0031] The above is the basic implementation manner of the present invention. Further improvements, optimizations, and limitations can be made on this basis to obtain the following embodiments:

[0032] Embodiment 2

[0033] This embodiment is an improved solution based on Embodiment 1. Its main structure is the same as that of Embodiment 1. The improvement lies in that: as Figure 1 and Figure 3 shown, the control mechanism is provided with a temperature detection interface and a control interface. The temperature detection interface is used to connect to the signal acquisition mechanism, and the control interface is used to connect to the control mechanism.

[0034] Embodiment 3

[0035] This embodiment is an improved solution based on Embodiment 2. Its main structure is the same as that of Embodiment 2. The improvement lies in that as Figure 1 and Figure 3 shown, the signal acquisition mechanism includes multiple temperature sensors, which are arranged at the air outlet of the charging module of the DC charger, the control board and the copper busbar. All the temperature sensors are connected to the temperature detection interface. The temperature sensor models can be PT100, PT1000, NTC, etc. The cooperation between the temperature sensor and the control mechanism is conventional technology in this field and will not be elaborated here.

[0036] Embodiment 4

[0037] This embodiment is an improved solution based on Embodiment 1. Its main structure is the same as that of Embodiment 1. The improvement lies in that as Figure 1 and Figure 3 shown, the control mechanism is provided with an Ethernet communication module, and the Ethernet communication module is connected to the main control module of the DC charger. When the new energy vehicle is charging, the charging status can be viewed in real time and the start and stop of charging can be controlled.

[0038] Embodiment 5

[0039] This embodiment is an improved solution based on Embodiment 1 or 2 or 3. Its main structure is the same as that of Embodiment 1 or 2 or 3. The improvement lies in that as Figure 1 and Figure 3 shown, a DC charger includes a main control module, a charging module and the above-mentioned heat dissipation device. The heat dissipation device is used to dissipate heat from the charging module, and the main control module is electrically connected to the control mechanism. The main control module controls the control mechanism, and the specific control method is conventional technology in this field and will not be elaborated here.

[0040] Embodiment 6

[0041] This embodiment is an improved solution based on Embodiment 5. Its main structure is the same as that of Embodiment 5. The improvement lies in that as Figure 1 and Figure 3As shown in the figure, the main control module is connected to a serial communication module, which includes a 232 communication module, a 485 communication module, and a CAN communication module. The 232 communication module is connected to the human-machine interaction module of the DC charger. The human-machine interaction module includes a display screen, a SOC, and a card swiping board, and the models of the display screen, SOC, and card swiping board are conventional technologies in the field and will not be elaborated here. The 485 communication module is connected to the DC ammeter of the DC charger, and the CAN communication module is connected to the charging module of the DC charger and the power supply system of the vehicle. The DC charger also includes an AC / DC switching power supply, which is a device that converts alternating current into direct current, converting the AC220V power supply into DC12V and supplying the DC12V to the DC power supply device. The power supply system of some vehicles requires a power supply of DC24V, and the DC charger needs to be equipped with a switching power supply that converts the AC220V power supply into DC24V.

[0042] Embodiment 7

[0043] This embodiment is an improved solution based on Embodiment 5. Its main structure is the same as that of Embodiment 5, and the improvement lies in: as Figure 1 and Figure 3 shown, the DC charger is provided with a heating mechanism, and the control mechanism controls the opening or closing of the heating mechanism according to the temperature obtained by the signal acquisition mechanism. The heating mechanism is an alpine component and is equipped in low-temperature regions. The control mechanism detects the internal temperature through a temperature sensor and controls the heating mechanism by judging whether the temperature reaches the preset values for starting and stopping the heating system. The heating mechanism includes a PTC heating rod.

[0044] Embodiment 8

[0045] This embodiment is an improved solution based on Embodiment 5. Its main structure is the same as that of Embodiment 5, and the improvement lies in: as Figure 1 and Figure 3 shown, the DC charger is provided with a humidity sensor and a water immersion detection sensor, and both the humidity sensor and the water immersion detection sensor are connected to the main control module of the DC charger. The models and working principles of the humidity sensor and the water immersion detection sensor are conventional technologies in the field and will not be elaborated here.

[0046] Embodiment 9

[0047] This embodiment is an improved solution based on Embodiment 5. Its main structure is the same as that of Embodiment 5, and the improvement lies in: as Figure 1 and Figure 3 shown, the DC charger is provided with a smoke sensor, and the smoke sensor is connected to the main control module of the DC charger. The model and working principle of the smoke sensor are conventional technologies in the field and will not be elaborated here.

[0048] Embodiment 10

[0049] This embodiment is an improved solution based on Embodiment 5. Its main structure is the same as that of Embodiment 5. The improvement lies in that, as Figure 1 and Figure 3 shown, the DC charger is provided with a tipping detection sensor, and the tipping detection sensor is connected to the main control module of the DC charger. The model and working principle of the tipping detection sensor are conventional techniques in the art and will not be elaborated here.

[0050] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A heat dissipation device for a DC charger, characterized in that: It includes a signal acquisition mechanism, a heat dissipation mechanism and a control mechanism; the heat dissipation mechanism includes a first heat dissipation module, a second heat dissipation module, a first AC contactor and a second AC contactor. The first heat dissipation module includes a first heat dissipation fan assembly and a second heat dissipation fan assembly. The second heat dissipation module includes a third heat dissipation fan assembly and a fourth heat dissipation fan assembly. The first AC contactor is used to control the on or off of the first heat dissipation fan assembly and the third heat dissipation fan assembly. The second AC contactor is used to control the on or off of the second heat dissipation fan assembly and the fourth heat dissipation fan assembly; The signal acquisition mechanism is used to obtain the temperature of the charging module of the DC charger; The control mechanism is used to control one of the first AC contactor and the second AC contactor to be in the on state and the other to be in the off state according to the temperature obtained by the signal acquisition mechanism.

2. The heat dissipation device for a DC charger according to claim 1, wherein: The control mechanism is provided with a temperature detection interface and a control interface. The temperature detection interface is used to connect to the signal acquisition mechanism, and the control interface is used to connect to the control mechanism.

3. The heat dissipation device for a DC charger according to claim 2, characterized in that: The signal acquisition mechanism includes a plurality of temperature sensors. The temperature sensors are arranged at the air outlet, the control board and the copper busbar of the charging module of the DC charger. All the temperature sensors are connected to the temperature detection interface.

4. The heat dissipation device for a DC charger according to claim 1, characterized in that: The control mechanism is provided with an Ethernet communication module, and the Ethernet communication module is connected to the main control module of the DC charger.

5. A DC charger, characterized in that: It includes a main control module, a charging module and a heat dissipation device as described in any one of claims 1-4. The heat dissipation device is used to dissipate heat from the charging module, and the main control module is electrically connected to the control mechanism.

6. The DC charger according to claim 5, characterized in that: The main control module is connected to a serial communication module. The serial communication module includes a 232 communication module, a 485 communication module and a CAN communication module. The 232 communication module is connected to the human-machine interaction module of the DC charger. The 485 communication module is connected to the DC ammeter of the DC charger. The CAN communication module is connected to the charging module of the DC charger and the power system of the vehicle.

7. The DC charger according to claim 5, wherein: The DC charger is provided with a heating mechanism, and the control mechanism controls the on or off of the heating mechanism according to the temperature obtained by the signal acquisition mechanism.

8. The DC charger according to claim 5, wherein: The DC charger is provided with a humidity sensor and a water immersion detection sensor. Both the humidity sensor and the water immersion detection sensor are connected to the main control module of the DC charger.

9. The DC charger according to claim 5, wherein: The DC charger is provided with a smoke sensor, and the smoke sensor is connected to the main control module of the DC charger.

10. The DC charger according to claim 5, characterized in that: The DC charger is provided with a tipping detection sensor, and the tipping detection sensor is connected to the main control module of the DC charger.

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