Charging system and charging port

Abstract

A charging system comprises a charging input configured to charge a vehicle-side battery, a charger configured to charge the vehicle-side battery outside the vehicle, a cable pulled from the charger, a charging connector configured to attach to the charging input, a cooling device configured to cool coolant, and a refrigerant path configured to extend from the cooling device, through the charging connector, to the charging input and back from the charging input, through the charging connector, to the cooling device without extending to the vehicle-side battery.

Description

TECHNICAL AREA

[0001] The present invention relates to a charging system and a charging input. BACKGROUND TECHNOLOGY

[0002] In related prior art, in an electric vehicle, including a plug-in hybrid electric vehicle, a charging gun (charging connector) is externally connected to a charging input provided in the vehicle body, and a vehicle-side battery attached to the vehicle body is charged by a charging device connected to the charging gun. In the electric vehicle, the vehicle-side battery generates heat in response to driving by a motor and is expediently cooled by a cooling mechanism provided in the vehicle body (see, for example, patent literature 1). CITATION LIST PATENT LITERATURE

[0003] Patent Literature 1: JP2019-140740A SUMMARY OF THE INVENTION

[0004] When an electric vehicle's battery is charged externally, a problem arises: the battery and the charging port generate heat due to Joule heating. This issue is particularly relevant given the recent efforts to increase battery capacity and reduce charging time.

[0005] To solve this problem, it's conceivable to cool the charging port using the vehicle's battery cooling mechanism. However, the refrigerant used to cool the battery has a specific temperature, making it difficult to effectively cool the charging port. Furthermore, cooling the charging port using the battery's cooling mechanism would require installing a large-capacity circulation pump, a heat exchanger, new piping, and other components within the electric vehicle. This would impose numerous limitations on circulating the refrigerant from the battery to the charging port. Additionally, this would complicate the electric vehicle's structure and increase its weight.

[0006] The present invention was made in view of the above circumstances, and one object of it is to provide a charging system and a charging input that is able to effectively cool the charging input without increasing the weight or complicating the structure of an electric vehicle.

[0007] To achieve the above objective, a charging system according to the present invention has the following features. The charging system comprises a charging inlet provided in a vehicle and configured to charge a vehicle-side battery; a charger configured to charge the vehicle-side battery outside the vehicle; a cable extending from the charger; a charging connector provided at a distal end of the cable and configured to connect to the charging inlet; a cooling device provided in the charger and configured to cool refrigerant; and a refrigerant path configured to extend from the cooling device via the charging connector to the charging inlet and from the charging inlet via the charging connector back to the cooling device without extending to the vehicle-side battery.

[0008] To achieve the above-described objective, a charging inlet according to the present invention is characterized as follows. The charging inlet is provided in a vehicle and is configured for charging a vehicle battery. The charging inlet comprises an inlet-side refrigerant path through which refrigerant flowing in from a charging connector attached to the charging inlet is returned to the charging connector without flowing to the vehicle battery.

[0009] According to the charging system and charging input of the present invention, it is possible to effectively cool the charging input without increasing the weight or complicating the structure of an electric vehicle.

[0010] The present invention has been briefly described above. Further details of the present invention can be clarified by reading about an embodiment (hereinafter referred to as the "embodiment") of the invention, which is described below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS Fig. Figure 1 is a block diagram showing a charging system and a charging input according to a first embodiment of the present invention. Fig. Figure 2 is a schematic front view showing the charging port. Fig. Figure 3 is a schematic perspective view showing the entire loading gun (loading connector). Fig. Figure 4 is a schematic perspective view showing a main part of the loading gun (loading connector). Fig. Figure 5 is a schematic view of the main part, showing a first connection and a second connection. Fig. Figure 6 is a block diagram showing a charging system and a charging input according to a second embodiment of the present invention. Fig. Figure 7 is a schematic main part view showing a switching valve of the charging system according to the second embodiment of the present invention. DESCRIPTION OF THE EXECUTION FORMS

[0011] Specific embodiments of the present invention are described below with reference to the drawings. First embodiment

[0012] A charging system and a charging input according to a first embodiment of the present invention are described below with reference to the drawings. As in Fig. Figure 1 shows a charging system 1 in an electric vehicle (vehicle) 10 and comprises a charging input 30 that charges a vehicle-side battery 20, a charger 40 that charges the vehicle-side battery 20 outside the electric vehicle 10, a cable 50 that is disconnected from the charger 40, and a charging gun (charging connector) 60 that is provided at a distal end of the cable 50 and is attached to the charging input 30.

[0013] The charging system 1 comprises a cooling device 70, which is provided in the charger 40 and cools refrigerant, and a refrigerant path 80, which extends from the cooling device 70 via the charging gun 60 to the charging inlet 30 and returns from the charging inlet 30 via the charging gun 60 to the cooling device 70 without leading to the vehicle battery 20. The charger 40 includes a charging device 41. Examples of refrigerants in the refrigerant path 80 are water, coolant, and insulating oil.

[0014] As in the Fig. 3 and Fig. As shown in Figure 4, the charging gun 60 comprises power supply terminals 61 and signal connection terminals 62, which are connected to the cable 50, and a connector housing 63 that accommodates the power supply terminals 61 and the signal connection terminals 62. The connector housing 63 includes a connector pass-through section 64 that accommodates the power supply terminals 61 and the signal connection terminals 62, and a connector base section 65 from which the connector pass-through section 64 projects. The connector pass-through section 64 is formed in a wall shape that surrounds the power supply terminals 61 and the signal connection terminals 62.

[0015] As in Fig. As shown in Figure 2, the charging input 30 comprises power supply input terminals 31 and signal input terminals 32, which are connected to the vehicle battery 20 (see Figure 2). Fig. 1) are connected, and an inlet housing 33 that accommodates the power supply input terminals 31 and the signal input terminals 32. The inlet housing 33 comprises an inlet pass section 34 that accommodates the power supply input terminals 31 and the signal input terminals 32, and an inlet base section 35 from which the inlet pass section 34 projects. The inlet pass section 34 is formed in a wall shape that surrounds the power supply input terminals 31 and the signal input terminals 32.

[0016] In the charging gun 60 and the charging input 30, when the power supply input terminals 61 are connected to the power supply input terminals 31 and the signal connection terminals 62 are connected to the signal input terminals 32, the connector pass section 64 and the inlet pass section 34 are nested inside each other to obtain an airtight seal, and the power supply input terminals 61, the signal connection terminals 62, the power supply input terminals 31 and the signal input terminals 32 are sealed off from the outside air.

[0017] Back to Fig. 1: The refrigerant path 80 comprises a refrigerant path (gun-side refrigerant path) 81 in the charging gun 60 and a refrigerant path (inlet-side refrigerant path) 82 in the charging inlet 30. The refrigerant path 81 comprises a supply path 81A and a return path 81B, and the refrigerant path 82 comprises a supply path 82A and a return path 82B. The charging gun 60 comprises first connections 66, 67 on the supply path 82A and the return path 82B of the refrigerant path 82 in the charging gun 60, respectively. As in the Fig. 3 and Fig. As shown in Figure 4, the first connections 66, 67 are provided outside the connector pass section 64 in the connector base section 65.

[0018] Dating back to Fig. 1. Charging inlet 30 contains second connections 36, 37 on the supply path 82A and the return path 82B of the refrigerant path 82 at charging inlet 30. As in Fig. As shown in Figure 2, the second connections 36, 37 are arranged outside the inlet pass section 34 in the inlet base section 35. A refrigerant block 38 is provided at a heat generation point in the charging inlet 30, and the supply path 82A and the return path 82B of the refrigerant path 82 are connected to the refrigerant block 38.

[0019] As in Fig. As shown in Figure 5, the first connections 66, 67 and the second connections 36, 37 have check valves 66A, 67A and 36A, 37A, respectively. When a pump of the cooling device 70, which will be described later, is driven and the refrigerant pressure in the refrigerant path 80 is equal to or higher than a certain value, the check valves 66A, 67A, 36A, 37A open and the refrigerant circulates. When the pump stops and the refrigerant flows back, the check valves 66A, 67A, 36A, 37A close to prevent the refrigerant from flowing back and from escaping the first connections 66, 67 and the second connections 36, 37.In the charging gun 60 and the charging inlet 30, the first connection 66 and the second connection 36 are airtightly connected to each other, the first connection 67 and the second connection 37 are airtightly connected to each other, and the check valves 66A, 67A, 36A, 37A are opened to allow the refrigerant to circulate when the pressure of the refrigerant in the refrigerant paths 81, 82 reaches a certain level or higher.

[0020] The cooling unit 70 comprises a radiator that cools the refrigerant, a pump that circulates the refrigerant in the refrigerant channels 81 and 82, a reservoir that stores the refrigerant, an injection port and an outlet port connected to the refrigerant channel 81, and various other auxiliary devices. The charging system 1 also includes a control unit 90 that controls the pump of the cooling unit 70. The control unit 90 comprises a computer that operates according to a program and controls the entire charging system 1. The control unit 90 adjusts the refrigerant pump speed accordingly, monitoring the temperature of the vehicle battery 20 and the refrigerant, the temperature rise rate, the refrigerant pressure, and similar parameters. If the refrigerant temperature is equal to or higher than a certain value, the control unit 90 stops the charging process and only performs the circulation and cooling of the refrigerant.

[0021] The control unit 90 stops a pump before removing the charging gun 60 from the charging inlet 30. Examples of conditions under which the control unit 90 stops the pump are when the vehicle battery 20 is fully charged after the charging process has started, when the vehicle battery 20 reaches a user-defined charge capacity, when a user-defined charging time is reached, and when the user freely terminates the charging process regardless of the charge capacity or charging time. When these conditions are met, the control unit 90 stops the pump, the refrigerant in the refrigerant lines 81, 82 flows back, and the check valves 66A, 67A, 36A, 37A are closed.Accordingly, the charging gun 60 can be removed from the charging inlet 30 after the refrigerant has not leaked from the first connections 66, 67 and the second connections 36, 37. <Betrieb der ersten Ausführungsform>

[0022] In charging system 1, as described above, the user points the charging gun 60 at the charging input 30, connects the power supply input terminals 31 and the signal input terminals 32 to the power supply input terminals 31 and 32, respectively, connects the first terminals 66 and 67 to the second terminals 36 and 37, and inserts the connector pass section 64 and the inlet pass section 34 in a nested manner. When the user in charging system 1 operates a control panel (not shown) of the control unit 90 to select a full charging mode, a charging mode with any capacity, a charging mode at any time, or similar, the control unit 90 begins charging and drives the pump to start pumping the refrigerant.The sequence of operation of the control unit 90's control panel by the user and the connection of the charging gun 60 to the charging input 30 by the user can be reversed.

[0023] When the cooling unit pump 70 is driven and the pressure of the refrigerant path 80 is equal to or higher than a certain value, the check valves 66A, 67A, 36A, and 37A open sequentially, the refrigerant circulates in the refrigerant paths 81 and 82, and a heat generation point of the charging inlet 30 is adequately cooled by the refrigerant block 38. During the charging process, the control unit 90 adjusts the refrigerant pump speed accordingly, monitoring the temperature of the vehicle battery 20 and the refrigerant, the temperature rise rate, the refrigerant pressure, and similar parameters. When the user-selected charging mode is complete, the control unit 90 terminates the charging process and stops the pump.

[0024] When the pump is stopped, the refrigerant flows back, with the check valves 66A, 67A, 36A, and 37A closing sequentially. A control panel (not shown) on the control unit 90 indicates that the charging gun 60 can be removed from the charging port 30. Even after the user removes the charging gun 60 from the charging port 30, the check valves 66A, 67A, 36A, and 37A remain closed, preventing refrigerant from escaping from the first connections 66 and 67, and the second connections 36 and 37. <Effekte der ersten Ausführungsform>

[0025] As described above, the charging system 1 according to the first embodiment of the present invention comprises the refrigerant path 80, which extends from the cooling device 70 via the charging gun 60 to the charging inlet 30 and from the charging inlet 30 via the charging gun 60 back to the cooling device 70, without extending to the vehicle-side battery 20. Therefore, it is not necessary to install a large-volume circulation pump, a heat exchanger, a new pipe, and the like within the electric vehicle 10, which would impose many restrictions, and the charging inlet 30 can be cooled effectively without increasing the weight or complicating the structure of the electric vehicle 10.

[0026] The charging system 1 according to the first embodiment of the present invention comprises the first connections 66, 67, which connect the refrigerant path 81 in the charging gun 60 and the refrigerant path 82 in the charging inlet 30, and the second connections 36, 37, which are connected to the first connections 66, 67 and connect the refrigerant path 81 in the charging gun 60 and the refrigerant path 82 in the charging inlet 30. The first connections 66, 67 and the second connections 36, 37 have the check valves 66A, 67A and 36A, 37A, respectively. Since the control unit 90 controls the pump of the cooling device 70, the refrigerant does not escape from the first connections 66, 67 and the second connections 36, 37, even when the charging gun 60 is removed from the charging inlet 30.

[0027] Furthermore, the cooling device 70 in the charging system 1 according to the first embodiment of the present disclosure comprises a pump that circulates the refrigerant in the refrigerant path 80, and the charging system 1 includes the control unit 90, which stops the pump before the charging inlet 30 and the charging gun 60 are removed. Therefore, the charging inlet 30 can be effectively cooled by the circulation of the refrigerant in the refrigerant path 80, and it can be reliably prevented that the refrigerant escapes from the first connections 66, 67 and the second connections 36, 37.

[0028] In the charging system 1 according to the first embodiment of the present invention, the first connections 66, 67 are provided outside the connector pass section 64 in the connector base section 65, and the second connections 36, 37 are provided outside the connector pass section 34 in the connector base section 35. Therefore, even if the refrigerant escapes from the first connections 66, 67 and the second connections 36, 37, the refrigerant does not affect the power supply input terminals 61, the signal connection terminals 62, the power supply input terminals 31, and the signal input terminals 32, which are isolated by the connector pass section 64 and the inlet pass section 34.The charging inlet 30 according to the first embodiment of the present disclosure comprises the refrigerant path (inlet-side refrigerant path) 82, through which the refrigerant flowing from the charging gun 60 is returned to the charging gun 60 without flowing to the vehicle-side battery 20. Therefore, it is not necessary to install a large-volume circulation pump, a heat exchanger, a new pipe, and the like within the electric vehicle 10, which would impose many restrictions, and the heat generation point can be cooled effectively without increasing the weight or complicating the structure of the electric vehicle 10. <zweite Ausführungsform>

[0029] Next, a charging system and a charging input according to a second embodiment of the present invention are described. In the second embodiment, which is described below, the elements already described in the first embodiment are designated by the same reference numerals in the drawings, and their description will accordingly be simplified or omitted.

[0030] As in Fig. As shown in Figure 6, a charging system 2 comprises an air compressor 43, which is provided in the charger 40, injects gas into the refrigerant path 80 and returns the refrigerant to a refrigerant inlet 42 of the cooling device, as well as switching valves 45, 46, which switch the refrigerant path 80 between a refrigerant outlet 44 of the cooling device 70 and the air compressor 43.

[0031] As in Fig.As shown in Figure 7, the refrigerant path 80 comprises a refrigerant path (refrigerant path on the cooling unit side) 47 in the cooling unit 70 and includes a supply path 47A and a return path 47B. An outlet path 43A of the air compressor 43 is connected to the supply path 47A. The switching valve 45 is provided in the supply path 47A, and the switching valve 46 is provided in the outlet path 43A.

[0032] In charging system 2, during charging, the switching valve 45 opens, the refrigerant circulates through the refrigerant path 80, the switching valve 46 closes, and the air compressor 43 stops. In charging system 2, the control unit 90, located upstream of the charging inlet 30 and the charging gun 60, closes the switching valve 45 and opens the switching valve 46 to switch to the air compressor 43, and then drives the air compressor 43. Accordingly, all the refrigerant in the refrigerant path 80 is collected in the cooling unit 70. <Auswirkungen der zweiten Ausführungsform>

[0033] As described above, the charging system 2 according to the second embodiment of the present invention comprises the refrigerant path 80, which extends from the cooling device 70 via the charging gun 60 to the charging inlet 30 and returns from the charging inlet 30 via the charging gun 60 to the cooling device 70 without extending to the vehicle-side battery 20. Therefore, similar to the charging system 1 according to the first embodiment, the charging inlet 30 can be effectively cooled without increasing the weight or complicating the structure of the electric vehicle 10.

[0034] The charging system 2 according to the second embodiment of the present invention comprises the air compressor 43, which injects gas into the refrigerant path 80 and returns the refrigerant to the refrigerant inlet 42 of the cooling unit 70, and the switching valves 45, 46, which switch the refrigerant path 80 between the refrigerant outlet 44 of the cooling unit 70 and the air compressor 43. The control unit 90 therefore switches the switching valves 45, 46 and drives the air compressor 43, so that the refrigerant in the refrigerant path 80 can be collected in the cooling unit 70 and thus, even with the charging inlet 30 and charging gun 60 removed, leakage of the refrigerant from the first connections 66, 67 and the second connections 36, 37 can be reliably prevented.

[0035] In particular, in the charging system 2 according to the second embodiment of the present invention, even when the charging inlet 30 and the charging gun 60 are removed, leakage of the refrigerant from the first connections 66, 67 and the second connections 36, 37 can be reliably prevented, so that the check valves shown in the first embodiment can be dispensed with.

[0036] In the charging system 2 according to the second embodiment of the present invention, the control unit 90 switches the switching valve 46 towards the air compressor 43 before the charging inlet 30 and the charging gun 60 are removed, and then drives the air compressor 43 so that the gas can be reliably pumped into the refrigerant path 80.

[0037] Features of embodiments of the charging system and charging input according to the present invention, as described above, are summarized below and listed in the following [1] to [7]. [1] A charging system comprising (1, 2): a charging input (30) provided in a vehicle (electric vehicle) (10) and configured for charging a vehicle-side battery (20); a charger (40) configured to charge the vehicle's own battery (20) outside the vehicle (10); a cable (50) that is unplugged from the charger (40); a charging connector (charging gun) (60) provided at a distal end of the wire (50) and configured to be attached to the charging inlet (30); a cooling device (70) provided in the charger (40) and configured to cool refrigerant; and a refrigerant path (80) configured to extend from the cooling device (70) via the charging connector (60) to the charging inlet (30) and from the charging inlet (30) via the charging connector (60) back to the cooling device (70) without extending to the vehicle battery (20).

[0038] According to the charging system (1, 2) with the above configuration [1], it is not necessary to install a large volume circulation pump, a heat exchanger, a new pipe and the like inside the electric vehicle 10 with many restrictions, and the charging input 30 can be effectively cooled without increasing the weight or complicating the structure of the electric vehicle 10.

[0039] [2] The charging system (1, 2) according to [1], which further comprises: a first connection (66, 67) provided in the charging connector (60) and configured to connect the refrigerant path (80, 81) in the charging connector (60) and the refrigerant path (80, 82) in the charging inlet (30); and a second connection (36, 37) provided in the charging inlet (30) is connected to the first connecting piece (66, 67) and is designed to connect the coolant path (80, 81) in the charging connector (60) and the coolant path (80, 82) in the charging inlet (30), wherein the first connection (66, 67) and the second connection (36, 37) include a check valve (66A, 67A, 36A, 37A).

[0040] Since the check valve (66A, 67A, 36A, 37A) is provided in the charging system (1, 2) with the above configuration [2], the refrigerant does not escape from the first connection (66, 67) and the second connection (36, 37) even when the charging connector (60) is removed from the charging inlet (30).

[0041] [3] The charging system (1, 2) according to [2], in which the cooling device (40) includes a pump configured to circulate the refrigerant in the refrigerant path (80), and the charging system (1) further comprises a control unit (90) configured to stop the pump before the charging input (30) and the charging connector (60) are removed.

[0042] According to the charging system (1) with the above configuration [3], the charging inlet (13) can be effectively cooled by circulating the refrigerant in the refrigerant path (80), and the refrigerant can be reliably prevented from escaping from the first connection (66, 67) and the second connection (36, 37).

[0043] [4] The charging system (1, 2) according to [1], further comprising: a first connection (66, 67) provided in the charging connector (60) and configured to connect the refrigerant path (81) in the charging connector (60) and the refrigerant path (82) in the charging inlet (30); and a second connection (36, 37) provided in the charging inlet (30) is connected to the first connection (66, 67) and is configured to connect the refrigerant path (81) in the charging connector (60) and the refrigerant path (82) in the charging inlet (30), wherein the charging connector (60) comprises a connector terminal (61, 62) which is connected to the cable (50) and a connector housing (63) which is configured to accommodate the connector terminal (61, 62), the charging input (30) has an inlet port (31, 32) which is connected to the vehicle battery (20) and an inlet housing (33) which is designed to receive the inlet port (31, 32), the connector housing (63) includes a connector pass section (64) configured to accommodate the connector terminal (61, 62) and a connector base section (65) from which the connector pass section (64) protrudes, the inlet housing (33) comprises an inlet pass section (34) configured to receive the inlet port (31, 32) of the connector and fitted into the connector pass section (64), and an inlet base section (35) from which the inlet pass section (34) protrudes, the first connection (66, 67) is provided outside the connector pass section (64) in the connector base section (65), and the second connection (36, 37) is provided outside the entry pass section (34) in the entry base section (35).

[0044] According to the charging system (1, 2) with the configuration of the above [4], since the first connection (66, 67) is provided outside the connector pass section (64) and the second connection (36, 37) is provided outside the inlet pass section (34), even if the refrigerant escapes from the first connection (66, 67) and the second connection (36, 37), the refrigerant does not affect the connector connection (61, 62) and the inlet connection (31, 32), which are insulated by the connector pass section (64) and the inlet pass section (34).

[0045] [5] The charging system (1, 2) according to [1], which further comprises: an air compressor (43) provided in the charger (40) and configured to inject gas into the refrigerant path (80) and return the refrigerant to a refrigerant inlet (42) of the cooling device (70); and a switching valve (45, 46) configured to switch the coolant path (80) between a coolant outlet (44) of the cooling device (70) and the air compressor (43).

[0046] According to the charging system (1, 2) which has the above configuration [5], the refrigerant in the refrigerant path (80) can be collected by the cooling device (70), and thus, even if the charging inlet (30) and the charging connector (60) are removed, it can be reliably prevented that the refrigerant escapes from the first connection (66, 67) and the second connection (36, 37), and the check valves can be omitted.

[0047] [6] The charging system (2) according to [5], further comprising: a control unit (90) configured to drive the air compressor (43) after switching the switching valve (46) to the side of the air compressor (43) before removing the charging inlet (30) and the charging connector (60).

[0048] According to the charging system (2) with the configuration of the above [6], the gas can be reliably pumped into the refrigerant path 80, since the air compressor (43) is driven after the switching valve (46) has been switched to the air compressor (43).

[0049] [7] A charging input (30) provided in a vehicle (electric vehicle) (10) and designed to charge a vehicle battery (20), wherein the charging input (30) comprises: an inlet-side coolant path (82) through which coolant flowing in from a charging connector (60) attached to the charging input (30) is returned to the charging connector (60) without flowing to the vehicle-side battery (20).

[0050] According to the charging input (30) which has the above configuration [7], it is not necessary to install a large volume circulation pump, a heat exchanger, a new pipe and the like inside the electric vehicle (10) with many restrictions, and the heat generation location can be effectively cooled without increasing the weight or complicating the structure of the electric vehicle (10). QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] JP 2019-140740A

[0003]

Claims

[1] A charging system (1, 2) comprising: a charging input (30) provided in a vehicle (10) and configured to charge a vehicle battery (20); a charger (40) configured to charge the vehicle's battery (20) outside the vehicle (10); a cable (50) that is led out of the charger (40); a charging connector (charging gun) (60) which is provided at a distal end of the cable (50) and configured to fit the charging input (30); a cooling device (70) provided in the charger (40) and configured to cool refrigerant; and a refrigerant path (80) configured to extend from the cooling device (70) via the charging connector (60) to the charging inlet (30) and from the charging inlet (30) via the charging connector (60) back to the cooling device (70) without extending to the vehicle battery (20). [2] The charging system (1, 2) according to claim 1, which further comprises: a first connection (66, 67) provided in the charging connector (60) and configured to connect the refrigerant path (80, 81) in the charging connector (60) and the refrigerant path (80, 82) in the charging inlet (30); and a second connection (36, 37) provided in the charging inlet (30) is connected to the first connection (66, 67) and is configured to connect the refrigerant path (80, 81) in the charging connector (60) and the refrigerant path (80, 82) in the charging inlet (30), wherein the first connection (66, 67) and the second connection (36, 37) have a check valve (66A, 67A, 36A, 37A). [3] The charging system (1, 2) according to claim 2, wherein the cooling device (40) includes a pump configured to circulate the refrigerant in the refrigerant path (80), and the charging system (1) further comprises a control unit (90) configured to stop the pump before the charging input (30) and the charging connector (60) are removed. [4] The charging system (1, 2) according to claim 1, further comprising: a first connection (66, 67) provided in the charging connector (60) and configured to connect the refrigerant path (81) in the charging connector (60) and the refrigerant path (82) in the charging inlet (30); and a second connection (36, 37) provided in the charging inlet (30) is connected to the first connection (66, 67) and is configured to connect the refrigerant path (81) in the charging connector (60) and the refrigerant path (82) in the charging inlet (30), wherein the charging connector (60) comprises a connector terminal (61, 62) which is connected to the cable (50) and a housing (63) which is configured to accommodate the connector terminal (61, 62), the charging input (30) has an inlet port (31, 32) which is connected to the vehicle battery (20) and an inlet housing (33) which is designed to receive the inlet port (31, 32), the connector housing (63) includes a connector pass section (64) configured to accommodate the connector terminal (61, 62) and a connector base section (65) from which the connector pass section (64) protrudes, the inlet housing (33) comprises an inlet pass section (34) configured to accommodate the inlet port (31, 32) and fitted into the connector pass section (64), and an inlet base section (35) from which the inlet pass section (34) protrudes, the first connection (66, 67) is provided outside the connector pass section (64) in the connector base section (65), and the second connection (36, 37) is provided outside the entry pass section (34) in the entry base section (35). [5] The charging system (1, 2) according to claim 1, further comprising: an air compressor (43) provided in the charger (40) and configured to inject gas into the refrigerant path (80) and return the refrigerant to a refrigerant inlet (42) of the cooling device (70); and a switching valve (45, 46) configured to switch the refrigerant path (80) between a refrigerant outlet (44) of the cooling device (70) and the air compressor (43). [6] The charging system (2) according to claim 5, which further comprises: a control unit (90) configured to drive the air compressor (43) after switching the switching valve (46) to the side of the air compressor (43) before removing the charging inlet (30) and the charging connector (60). [7] A charging input (30) provided in a vehicle (10) and configured to charge a vehicle battery (20), wherein the charging input (30) has: an inlet-side refrigerant path (82) through which refrigerant flowing in from a charging connector (60) connected to the charging input (30) is returned to the charging connector (60) without flowing to the vehicle-side battery (20).

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