Power distribution system of liquid cooling charging connector

Abstract

The utility model provides a power distribution system of a liquid-cooled charging connector, which relates to the technical field of charging power distribution and comprises a plurality of national standard charging terminals and a liquid-cooled charging terminal, each national standard charging terminal is electrically connected with a national standard charging connector through a first direct-current bus, and each liquid-cooled charging terminal is electrically connected with a second direct-current bus through a second direct-current bus. Each liquid cooling charging terminal is electrically connected with a liquid cooling charging connector through a second direct current bus; first electromagnetic switches are electrically connected between the adjacent first direct-current buses and between the adjacent second direct-current buses, and each second direct-current bus is electrically connected with all the first direct-current buses through a second electromagnetic switch; and each national standard charging terminal, the liquid cooling charging terminal, the control end of the first electromagnetic switch and the control end of the second electromagnetic switch are electrically connected with a control system. By controlling the on-off of each first electromagnetic switch and each second electromagnetic switch, the power of the adjacent national standard charging connector and the liquid cooling charging connector can be called, and the output efficiency of the national standard charging connector is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of charging power distribution, and in particular to a power distribution system for a liquid-cooled charging connector. Background Art

[0002] As a new product, new energy charging products are developing at a high speed. The market has put forward higher requirements for the charging speed of charging products. Conventional passenger cars require the charging time to be controlled within 20 minutes. To meet customer needs, each charging equipment manufacturer has launched a charging solution for liquid-cooled charging connectors, and the charging speed has been greatly improved. However, there are certain defects in the power distribution schemes of liquid-cooled charging connectors on the market. At present, the power distribution schemes of liquid-cooled charging connectors on the market are roughly divided into the following two schemes:

[0003] One is to adopt a full matrix power distribution scheme. The advantage of this scheme is that it can maximize the charging power of the charging terminal and is less restricted by on-site conditions and usage. However, this scheme has a high cost, and as the power of the charging module increases, the service life of its switching relay is uncontrollable, and the after-sales workload is large after damage.

[0004] The other is to adopt a ring power distribution scheme. This scheme has a lower cost and less after-sales workload compared with the full matrix power distribution. However, it cannot reach the charging power of the liquid-cooled charging gun and is seriously affected by on-site usage. Once the national standard conventional charging connectors on both sides of the liquid-cooled charging connector are used for charging, the power of the liquid-cooled charging connector can only output its own power; it cannot meet the requirements of the liquid-cooled charging connector. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is that it is impossible to simultaneously improve the output power of the liquid-cooled charging connector and the national standard charging connector. To overcome the above defects of the prior art, the utility model provides a power distribution system for a liquid-cooled charging connector.

[0006] The utility model provides a power distribution system for a liquid-cooled charging connector, which includes a plurality of national standard charging terminals and liquid-cooled charging terminals. Each national standard charging terminal is respectively electrically connected to a national standard charging connector through a first DC bus, and each liquid-cooled charging terminal is respectively electrically connected to a liquid-cooled charging connector through a second DC bus; a first electromagnetic switch is electrically connected between adjacent first DC buses and between adjacent second DC buses, and each second DC bus is respectively electrically connected to all first DC buses through a second electromagnetic switch; the control ends of each national standard charging terminal, liquid-cooled charging terminal, first electromagnetic switch, and second electromagnetic switch are all electrically connected to a control system, and the control system controls the conduction or cut-off of each first electromagnetic switch and second electromagnetic switch according to the discharge conditions of the national standard charging terminal and the liquid-cooled charging terminal.

[0007] Compared with the prior art, the power distribution system of a liquid-cooled charging connector in this application has the following advantages: By controlling the on / off of each first electromagnetic switch, the power of adjacent national standard charging connectors can be called. Then, by controlling the on / off of each second electromagnetic switch, the national standard charging connector can call the power of the liquid-cooled charging connector, and fully call the power of the liquid-cooled charging connector. On the basis of fully ensuring the output power of the liquid-cooled charging connector, the output efficiency of the national standard charging connector is further improved.

[0008] In a possible implementation manner, the first electromagnetic switch is a DC contactor.

[0009] Compared with the prior art, by using a contactor to implement the on / off operation, the service life is greatly extended compared with the existing relay.

[0010] In a possible implementation manner, the second electromagnetic switch is a DC contactor.

[0011] Compared with the prior art, by using a contactor to implement the on / off operation, the service life is greatly extended compared with the existing relay.

[0012] In a possible implementation manner, there are two liquid-cooled charging terminals.

[0013] Compared with the prior art, by setting two liquid-cooled charging terminals, one can be respectively called to connect with the national standard charging terminal to achieve the improvement of the power of the national standard charging terminal.

[0014] In a possible implementation manner, there are ten national standard charging terminals.

[0015] Compared with the prior art, by setting ten national standard charging terminals, several adjacent national standard charging terminals can be called and paralleled to achieve the improvement of the power of the national standard charging terminals.

[0016] In a possible implementation manner, the national standard charging connector is a 250A national standard DC charging connector.

[0017] In a possible implementation manner, the liquid-cooled charging connector is a 600A liquid-cooled DC charging connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the system circuit diagram of the power distribution system of a liquid-cooled charging connector of the present utility model.

[0019] Description of the reference numerals:

[0020] 11 - National standard charging terminal; 12 - Liquid-cooled charging terminal; 21 - First DC bus; 22 - Second DC bus; 31 - National standard charging connector; 32 - Liquid-cooled charging connector; 4 - First electromagnetic switch; 5 - Second electromagnetic switch; 6 - Control system. Detailed implementation manners

[0021] First of all, those skilled in the art should understand that these implementation manners are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments according to needs to adapt to specific application scenarios.

[0022] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0023] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] See Figure 1 As shown, the embodiments of the present application disclose a power distribution system for a liquid-cooled charging connector, including a plurality of national standard charging terminals 11 and liquid-cooled charging terminals 12. Each national standard charging terminal 11 is electrically connected to a national standard charging connector 31 through a first DC bus 21 respectively, and each liquid-cooled charging terminal 12 is electrically connected to a liquid-cooled charging connector 32 through a second DC bus 22 respectively.

[0025] Through the DC bus, one-to-one direct connection is realized, and each charging terminal can charge new energy vehicles and RVs through the charging connector.

[0026] Among them, a first electromagnetic switch 4 is electrically connected between adjacent first DC buses 21 and between adjacent second DC buses 22, and each second DC bus 22 is electrically connected to all first DC buses 21 through a second electromagnetic switch 5 respectively.

[0027] The control terminals of each national standard charging terminal 11, liquid-cooled charging terminal 12, first electromagnetic switch 4 and second electromagnetic switch 5 are all electrically connected to a control system 6; the control system 6 controls the conduction or cut-off of each first electromagnetic switch 4 and second electromagnetic switch 5 according to the discharge conditions of the national standard charging terminal 11 and the liquid-cooled charging terminal 12.

[0028] By controlling the on / off of each first electromagnetic switch 4 through the control system 6, the power of the adjacent national standard charging connector 31 can be called. Then, by controlling the on / off of each second electromagnetic switch 5 through the control system 6, the national standard charging connector 31 can also call the power of the liquid-cooled charging connector 32, and fully call the power of the liquid-cooled charging connector 32. On the basis of fully ensuring the output power of the liquid-cooled charging connector 32, the output efficiency of the national standard charging connector 31 is further improved.

[0029] In this embodiment, the control system 6 is used to control the conduction or closing of the first electromagnetic switch 4 and the second electromagnetic switch 5, so as to improve the output efficiency of the national standard charging connector 31 and meet the required power of the liquid-cooled charging connector 32. Moreover, the charging power and charging efficiency of the liquid-cooled charging connector 32 are further improved, and it is less and less affected by the on-site charging situation; and the cost is low. Compared with the traditional power distribution method, the cost is reduced by one-third.

[0030] Through the control of the first electromagnetic switch 4 and the second electromagnetic switch 5, the efficiency distribution is realized, and the efficiency distribution is optimal; the control scheme is made the simplest, and the distribution efficiency is improved through the optimal algorithm.

[0031] In this embodiment, the first electromagnetic switch 4 is a DC contactor, and the second electromagnetic switch 5 is a DC contactor. The on / off operation is realized through the contactor. Compared with the existing relay, the service life is greatly extended.

[0032] Only the first electromagnetic switch 4, the second electromagnetic switch 5 and the control system 6 are added, which is convenient for maintenance. Compared with the traditional circuit board form, the first electromagnetic switch 4 and the second electromagnetic switch 5 in this embodiment are directly an independent unit for the DC contact, and the disassembly and installation are more convenient, and the maintenance efficiency is doubled.

[0033] Compared with other power distribution methods, this embodiment adopts on-board cutting, which has a larger safety distance, better safety performance, and a lower possibility of short-circuit breakdown.

[0034] In this embodiment, there are two liquid-cooled charging terminals 12, which are represented by the liquid-cooled charging terminal U11 and the liquid-cooled charging terminal U12. Therefore, there are also two liquid-cooled charging connectors 32, which are represented by the liquid-cooled charging connector Q11 and the liquid-cooled charging connector Q12.

[0035] There are ten national standard charging terminals 11, which are represented by the national standard charging terminal U1 to the national standard charging terminal U10. Therefore, there are also ten national standard charging connectors 31, which are represented by the national standard charging connector Q1 to the national standard charging connector Q10.

[0036] That is, 12 groups of DC contactors are set to realize the connection between adjacent DC buses, denoted by KM1 - KM12, and these 12 groups of DC contactors are all set in the middle of the DC buses. Then, national standard charging terminals U1 - U10 are respectively electrically connected to the liquid-cooled charging terminal U11 on the left through a DC contactor, and national standard charging terminals U1 - U10 are respectively also electrically connected to the liquid-cooled charging terminal U12 on the right through a DC contactor.

[0037] When the DC contactor in the middle of the first DC bus 21 is not in use, the first DC bus 21 can call the DC contactor on the left side of the DC bus or the DC contactor on the right side of the DC bus for connection power output.

[0038] For example, when the national standard charging connector Q2, as a charging gun, needs to perform power output, the control system 6 can be used to control the DC contactors KM1 and KM3 to close, so that the charging power originally input from the national standard charging terminal U1 to the national standard charging connector Q1 and the charging power originally input from the national standard charging terminal U3 to the national standard charging connector Q3 are both output through the national standard charging connector Q2, achieving an improvement in the charging efficiency of the national standard charging connector Q2. This is the power supplement between adjacent national standard charging connectors to achieve an improvement in charging efficiency.

[0039] Of course, a liquid-cooled charging connector can also be used for power supplement. For example, when the liquid-cooled charging connector Q11 itself is not working, the control system 6 can be used to control the second electromagnetic switch 5 to close, and the liquid-cooled charging terminal U11 can output through the closed second electromagnetic switch 5 via the national standard charging connector Q2, and the charging efficiency of the national standard charging connector Q2 will be improved. The charging output power and current of the liquid-cooled charging connectors Q11 and Q12 are large. Therefore, generally, only one liquid-cooled charging terminal needs to be connected to achieve an improvement in the power of the national standard charging connector.

[0040] In this embodiment, the national standard charging connector 31 is a 250A national standard DC charging connector. The liquid-cooled charging connector 32 is a 600A liquid-cooled DC charging connector.

[0041] In the description of the present application, the descriptions with reference to terms such as "one embodiment", "some embodiments", "in this embodiment", "specific examples", or "some examples", etc., mean that the specific features, mechanisms, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0042] As described above, it is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A power distribution system for a liquid-cooled charging connector, characterized in that, It includes multiple national standard charging terminals (11) and liquid-cooled charging terminals (12). Each of the national standard charging terminals (11) is electrically connected to a national standard charging connector (31) through a first DC bus (21), and each of the liquid-cooled charging terminals (12) is electrically connected to a liquid-cooled charging connector (32) through a second DC bus (22); a first electromagnetic switch (4) is electrically connected between adjacent first DC buses (21) and between adjacent second DC buses (22), and each of the second DC buses (22) is electrically connected to all the first DC buses (21) through a second electromagnetic switch (5); The control terminals of each of the national standard charging terminals (11), liquid-cooled charging terminals (12), first electromagnetic switches (4), and second electromagnetic switches (5) are all electrically connected to a control system (6). The control system (6) controls the conduction or cutoff of each of the first electromagnetic switches (4) and second electromagnetic switches (5) according to the discharging conditions of the national standard charging terminals (11) and liquid-cooled charging terminals (12).

2. The power distribution system of the liquid-cooled charging connector according to claim 1, wherein The first electromagnetic switch (4) is a DC contactor.

3. The power distribution system of the liquid-cooled charging connector according to claim 1, characterized in that, The second electromagnetic switch (5) is a DC contactor.

4. The power distribution system of the liquid-cooled charging connector according to claim 1, characterized in that, There are two liquid-cooled charging terminals (12).

5. The power distribution system of the liquid-cooled charging connector according to claim 1, characterized in that, There are ten national standard charging terminals (11).

6. The power distribution system of the liquid-cooled charging connector according to claim 1, wherein The national standard charging connector (31) is a 250A national standard DC charging connector.

7. The power distribution system of the liquid-cooled charging connector according to claim 1, wherein The liquid-cooled charging connector (32) is a 600A liquid-cooled DC charging connector.

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