Electrical coupling system

Abstract

The invention relates to an electrical coupling system (100) for electrically connecting a transmitting port (210) of a power source (200) to a receiving port (310) of a power consumer (300), the electrical coupling circuit (100) comprising a first electrical storage unit (1) connected to the transmitting port (210) and the receiving port (310), respectively, via a first mechanical switch (114), wherein the first mechanical switch (114) is configured to operate in: a first mode (M1) in which the first electrical storage unit (1) is in galvanic contact with the transmit port (210); a second mode (M2) in which the first electrical storage cell (1) is in galvanic contact with the receiving port (310); or a third mode (M3) in which the first electrical storage unit (1) is in non-galvanic contact with the transmitting port (210) and with the receiving port (310). Furthermore, the invention relates to an electrical system (500) comprising a power source (200), a power consumer (300) and an electrical coupling system (100).

Description

Technical Field

[0001] Embodiments of the present invention relate to an electrical coupling system for connecting a power source to an electricity consumer. Background Technology

[0002] Different types of voltage systems or power systems are known in this art. Power systems can be configured to provide or feed power to electrical loads. Such power systems can be represented as power sources, such as wind farms, solar power plants, main power grids, etc.

[0003] A power system can also be configured to receive electricity, that is, electricity fed by an external power source. Such a power system can be called an electricity consumer.

[0004] An electrical system can also alternately act as a power source or a power consumer at different points in time. A battery system is an example of such a system.

[0005] When a power source is connected to an electricity consumer, an electrical coupling device is needed to transfer power from the power source to the electricity consumer. Electrical coupling can be based on non-current contact (e.g., by using a transformer) or on direct conductive contact. Summary of the Invention

[0006] The objective of embodiments of the present invention is to provide a solution to mitigate or resolve the drawbacks and problems of conventional solutions.

[0007] The objective of embodiments of the present invention is to provide a secure solution for transmitting electricity from a power source to an electricity consumer.

[0008] The above and other objectives are addressed by the subject matter of the independent claims. Other embodiments of the invention can be found in the dependent claims.

[0009] According to a first aspect of the invention, the above and other objectives are achieved by an electrical coupling system for electrically connecting a power source's transmitting port to a power consumer's receiving port, the electrical coupling circuit including a first electrical storage unit connected to the transmitting port and the receiving port respectively via a first mechanical switch, wherein the first mechanical switch is configured to operate in the following mode:

[0010] In the first mode, the first electrical storage unit is in contact with the current of the transmitting port.

[0011] In the second mode, the first electrical storage unit is in contact with the current at the receiving port, or

[0012] In the third mode, the first electrical storage unit is in non-current contact with both the transmitting and receiving ports.

[0013] Non-current contact can also be understood as a non-current state. Therefore, the first mechanical switch is in one of the first, second, or third modes at a certain point in time.

[0014] Therefore, the first electrical storage unit can be configured to load power from the power source when the first mechanical switch is in a first mode, and to deliver power to the power consumer when the first mechanical switch is in a second mode.

[0015] The advantage of the electrical coupling system disclosed herein is that it provides safe current isolation between different power systems that may be interconnected. Therefore, personal safety is improved compared to conventional solutions. Furthermore, since the disclosed electrical coupling system eliminates the need for transformers, inverters, and DC-DC converters such as pulse width modulation (PWM), power losses during power transmission are reduced, thus improving power transmission efficiency.

[0016] In an implementation of the electrical coupling system according to the first aspect, the first mechanical switch is configured to switch from a first mode to a second mode via a third mode, and vice versa.

[0017] In the implementation of the electrical coupling system according to the first aspect, the first mechanical switch is configured as follows:

[0018] When the storage level of the first electrical storage cell is lower than a first threshold, switch to the first mode; and / or

[0019] When the storage level of the first electrical storage cell exceeds the second threshold, switch to the second mode.

[0020] In the implementation of the electrical coupling system according to the first aspect, the first threshold is lower than the second threshold.

[0021] In the implementation of the electrical coupling system according to the first aspect, the first mechanical switch is configured to switch to the third mode under the following conditions:

[0022] An error was detected in the first electrical storage unit;

[0023] Perform measurements on the first electrical storage cell; and / or

[0024] The first electrical storage unit enters passive mode.

[0025] Thus, the electrical coupling system enters the third mode during relevant and critical events.

[0026] In an implementation of the electrical coupling system according to the first aspect, the electrical coupling system includes a first electrical switch connected between a first electrical storage unit and a first mechanical switch.

[0027] This can further improve electrical safety.

[0028] In an implementation of the electrical coupling system according to the first aspect, when the first mechanical switch is switching to the first mode or the second mode, the first electrical switch is configured to be in its non-conducting state.

[0029] This further improves electrical safety.

[0030] In an implementation of the electrical coupling system according to the first aspect, when the first mechanical switch has been switched to the first mode or the second mode, the first electrical switch is configured to be in its on state.

[0031] This further improves electrical safety.

[0032] In an implementation of the electrical coupling system according to the first aspect, when the first mechanical switch is in the third mode, the first electrical switch is configured to be in its non-conducting state.

[0033] This can reduce power loss.

[0034] In an implementation of the electrical coupling system according to the first aspect, the electrical coupling system includes:

[0035] The second electrical storage unit is connected to the transmitting port and the receiving port respectively via a second mechanical switch; and

[0036] A third electrical storage unit is connected to the transmitting port and the receiving port respectively via a third mechanical switch.

[0037] In an implementation of the electrical coupling system according to the first aspect, at a first time point, a first mechanical switch is configured to operate in a first mode, a second mechanical switch is configured to operate in a second mode, and a third mechanical switch is configured to operate in the second mode.

[0038] This allows for uninterrupted power transmission.

[0039] In the implementation of the electrical coupling system according to the first aspect, the third mechanical switch is configured to switch to the first mode at a second time point after the first time point.

[0040] In an implementation of the electrical coupling system according to the first aspect, the first mechanical switch is configured to switch to the second mode at a third time point after the second time point.

[0041] In the implementation of the electrical coupling system according to the first aspect, the second mechanical switch is configured to switch to the first mode at a fourth time point after the third time point.

[0042] In an implementation of the electrical coupling system according to the first aspect, at a first time point, the first mechanical switch is configured to operate in a first mode, the second mechanical switch is configured to operate in a second mode, and the third mechanical switch is configured to operate in a third mode.

[0043] Therefore, the electrical coupling system is ready for use in a variety of different applications.

[0044] In the implementation of the electrical coupling system according to the first aspect, the third mechanical switch is configured to switch to either the first mode or the second mode at a second time point after the first time point.

[0045] In an implementation of the electrical coupling system according to the first aspect, the electrical coupling system includes:

[0046] A second electrical switch connected between the second electrical storage unit and the second mechanical switch; and

[0047] A third electrical switch connecting the third electrical storage unit and the third mechanical switch.

[0048] In an implementation of the electrical coupling system according to the first aspect, the electrical coupling system includes a control device that communicates with and is configured to control the mechanical and electrical switches.

[0049] According to a second aspect of the invention, the above and other objectives are achieved using an electrical system comprising a power source, an electricity consumer, and an electrical coupling system according to an embodiment of the invention.

[0050] Further applications and advantages of the embodiments of the present invention will become apparent from the following detailed description. Attached Figure Description

[0051] The accompanying drawings are intended to illustrate and explain different embodiments of the invention, wherein:

[0052] - Figure 1 An electrical coupling system according to an embodiment of the present invention is schematically illustrated;

[0053] - Figure 2 The operation of a mechanical switch and an electrical switch according to an embodiment of the present invention is shown;

[0054] - Figure 3 An electrical coupling system according to an embodiment of the present invention is shown;

[0055] - Figure 4 and Figure 5 Further embodiments of the present invention are illustrated;

[0056] Figure 6 An electrical coupling system according to an embodiment of the present invention is shown; and

[0057] Figure 7 The diagram illustrates the power system. Detailed Implementation

[0058] Figure 1 An electrical coupling system 100 is illustrated for electrically connecting the transmitting port 210 of a power source 200 to the receiving port 310 of a power consumer 300. The disclosed electrical coupling circuit 100 includes a first electrical storage unit 1 connected to the transmitting port 210 and the receiving port 310 via a first mechanical switch 114.

[0059] The first mechanical switch 114 according to the invention is configured to operate in the following modes: a first mode M1, wherein the first electrical storage unit 1 is in current contact with the transmitting port 210; a second mode M2, wherein the first electrical storage unit 1 is in current contact with the receiving port 310; or a third mode M3, wherein the first electrical storage unit 1 is not in current contact with both the transmitting port 210 and the receiving port 310. Therefore, the first electrical storage unit 1 may be in one of the three operating modes or states M1, M2, and M3 at any given time.

[0060] The transmitting port 210 and receiving port 310 can be any suitable port for conductively and electrically connecting the electrical coupling system 100 to the power supply 200 and the electrical device 300, respectively. The transmitting port 210 and receiving port 310 may each include one or more sub-ports, thereby connecting to one or more power supplies 200 and one or more power consumers 300, respectively. The transmitting port 210 and receiving port 310 may include conductive elements for direct conductive coupling. The power at the power supply 200 and the power consumer 300 can be direct current (DC) or alternating current (AC). According to embodiments of the invention, the input DC / AC and output DC / AC of the electrical coupling system 100 can have different voltages / currents and / or frequencies.

[0061] Power source 200 can be a power source that supplies power to one or more electrical loads, and can be a battery pack, wind farm, solar power plant, power grid system, or any other suitable power source. Power consumer 300 can be any electrical load (one or more) that directly or indirectly consumes power to perform its function, such as an electric motor, generator, etc. However, power consumer 300 does not necessarily consume power immediately. It should be noted that power source 200 can switch between being configured to act as a power source and a power consumer at different points in time. The same applies to power consumer 300, which can also switch between being configured to act as a power consumer and a power source at different points in time.

[0062] Furthermore, the current contact described in this paper can guide direct conductive contact between electrical components without any intermediate dielectric. For example, in this respect, the mechanical contact between a first conductive element and a second conductive element can be regarded as a current contact.

[0063] In an embodiment of the invention, the first mechanical switch 114 is configured to switch from the first mode M1 to the second mode M2 ​​via the third mode M3, and this also applies to switching in the reverse direction. That is, according to this embodiment, the first mechanical switch 114 is also configured to switch from the second mode M2 ​​to the first mode M1 via the third mode M3. Therefore, the third mode M3 can be considered as an intermediate non-current contact mode between the first mode M1 and the second mode M2 ​​(both of which are current contact modes).

[0064] In another embodiment of the present invention, when the storage level of the first electrical storage unit 1 is lower than a first threshold, the first mechanical switch 114 can switch from the second mode M2 ​​or the third mode M3 to the first mode M1. Alternatively, when the storage level of the first electrical storage unit 1 is higher than the second threshold, the first mechanical switch 114 can also switch from the first mode M1 or the third mode M3 to the second mode M2. In this embodiment of the present invention, the first threshold is lower than the second threshold. For example, the first threshold can be 10% of the maximum power of the first electrical storage unit 1, and the second threshold can be 90% of the maximum power of the first electrical storage unit 1. The first threshold can be any other value among 20%, 30%, 40%, and 50%, while the second threshold can be any other value among 80%, 70%, and 60%.

[0065] Therefore, if the detected power level is below a first threshold, the first electrical storage unit 1 will switch to a first mode M1; and if the detected power level is above a second threshold, it will switch to a second mode M2 ​​accordingly. Furthermore, more than two thresholds can be used to control the operating mode / state of the first electrical storage unit 1. For example, one or more intermediate thresholds can be used such that if the power level exceeds such an intermediate threshold, the first electrical storage unit 1 switches to a third mode M3. By appropriately determining and coordinating the thresholds, the electrical coupling system 100 can load and supply power to meet the requirements and conditions set by the power supply 200 and the power consumer 300. Additionally, this determination can optimize the lifespan of the first electrical storage unit 1 (such as a battery).

[0066] Furthermore, when an error / fault is detected in the first electrical storage unit 1, the first mechanical switch 114 can switch from the first mode M1 or the second mode M2 ​​to the third mode M3, allowing the first electrical storage unit 1 to be removed or repaired. An error may mean that the operation of the first electrical storage unit 1 has malfunctioned or is damaged. Other switching conditions for switching from the first mode M1 or the second mode M2 ​​to the third mode M3 may include when measuring the first electrical storage unit 1, and / or when entering a power-saving mode or passive mode of the first electrical storage unit 1. Measuring the first electrical storage unit 1 can be understood as performing any conventional measurement on the first electrical storage unit 1, such as measuring its power level or electrical characteristics, for example, its resistivity and conductivity. A power-saving mode or passive mode may mean that the electrical storage unit 1 is completely disconnected from any (one or more) external loads and can therefore store power for a period of time with almost no drop in its power level.

[0067] Figure 2 The method of operation of mechanical switch 114 according to this solution is shown in more detail. Figure 2 In mode a, the first mechanical switch 114 operates in the first mode M1, and therefore the first electrical storage unit 1 is in current contact with the transmitting port 210, but not with the receiving port 310. Figure 2 In c, the first mechanical switch 114 is in the second mode M2, and the first electrical storage unit 1 is in current contact with the receiving port 310, but not with the transmitting port 210. Finally, in Figure 2 In mode b, the first mechanical switch 114 is in the third mode M3, and the first electrical storage unit 1 is not in contact with the current of the receiving port 310, nor with the current of the transmitting port 210, and therefore is not in contact with the current of either the power supply 200 or the power consumer 300. Thus, the first electrical storage unit 1 is in a conductive contactless mode in the third mode M3.

[0068] Figure 2 The diagram also illustrates an electrical coupling system 100 including a first electrical switch 116 that is associated with and synchronized with a first mechanical switch 114 during operation. In this embodiment, the first electrical switch 116 is connected between the first electrical storage cell 1 and the first mechanical switch 114. Therefore, power must always flow through and out of the first electrical storage cell 1 via the first electrical switch 116. The first electrical switch 116 can be of any suitable type, such as a field-effect transistor (FET), which allows current to pass through it in its on-state and prevents current from passing through it in its off-state. Because this solution can use a low-voltage FET, its manufacturing cost is lower compared to a high-voltage FET.

[0069] In embodiments of the invention, the synchronization of the first mechanical switch 114 and the first electrical switch 116 is particularly related to the three different operating modes of the mechanical switch (i.e., modes M1, M2, and M3). The first electrical switch 116 can switch from its on state to its off state before the first mechanical switch 114 switches to the first mode M1. Therefore, when the first mechanical switch 114 is switching to the first mode M1 or the second mode M2, the first electrical switch 116 is configured to be in its off state. Additionally, after the first mechanical switch 114 switches to the second mode M2, the first electrical switch 116 can switch from its off state to its on state. Therefore, when the first mechanical switch 114 has switched to the first mode M1 or the second mode M2, the first electrical switch 116 is configured to be in its on state. Thus, no current flows when the mechanical switch switches, meaning no electric arc will be generated. For the third mode M3, when the first mechanical switch 114 is in the third mode M3, the first electrical switch 116 can be in its off state to save power and perform measurements.

[0070] Figure 3 An electrical coupling system 100 including additional electrical storage units is shown. In a non-limiting example, the electrical coupling system 100 includes a second electrical storage unit 2, which is connected to a transmitting port 210 and a receiving port 310 via a second mechanical switch 124, respectively. The electrical coupling system 100 also includes a third electrical storage unit 3, which is connected to the transmitting port 210 and the receiving port 310 via a third mechanical switch 134, respectively. However, it should be appreciated that the electrical coupling system 100 may include any number of electrical storage units configured as a first electrical storage unit 1, i.e., configured to operate and function according to any embodiment of the first electrical storage unit 1 (such as in the first M1, second M2, and third M3 modes). In embodiments of the invention, the respective electrical storage units 1, 2, 3 are connected to a power source 200 and a power consumer 300 via respective conductive lines and mechanical switches 114, 124, 134 and additional electrical switches 116, 126, 136.

[0071] It should also be noted that each electrical storage unit 1, 2, 3 may include a set of electrical modules 118, 128, 138 capable of storing electrical energy, such as batteries, capacitors, and / or transformers. These electrical modules 118, 128, 138 within the electrical storage units 1, 2, 3 can be interconnected via conductive and communication interfaces. The electrical modules 118, 128, 138 in each electrical storage unit 1, 2, 3 may provide different voltage values ​​depending on the voltage configuration of these electrical modules 118, 128, 138. The aforementioned voltage configuration can be controlled by a control device or control unit 400, for example via... Figure 6 The control circuit shown is used for control.

[0072] Figure 4 The illustration shows possible operational configurations or states of the electrical storage units 1, 2, and 3 of the electrical coupling system 100 disclosed herein. Generally, multiple electrical storage units can operate in any of the three modes M1, M2, and M3, and can be synchronized with each other to provide different power coupling functions / settings depending on the required application. For example, as... Figure 4 As shown in Figure 1, the first electrical storage unit 1 can be in a first mode M1, thereby loading power from the power source 200, while the second electrical storage unit 2 can be in a second mode M2, thereby supplying power to the power consumer 300. One or more third electrical storage units 3 can simultaneously be in a third intermediate mode M3, neither loading nor supplying power. Therefore, the third mode M3 can also be represented as a rest mode, a passive mode, an energy-saving mode, or a measurement mode.

[0073] Depending on the desired power coupling function, one or more third electrical storage units 3 can be configured to switch to either the first mode M1 or the second mode M2. For example, Figure 4 b illustrates a scenario where some third-generation electrical storage units have switched to the first mode M1, while others have switched to the second mode M2. This may occur, for example, when some third-generation electrical storage units 3 require power, while others have the capacity to supply the power required by the power consumer 300. On the other hand, Figure 4 c shows the situation where all third electrical storage units 3 have been switched to the second mode M2, while Figure 4 d shows the situation where all third electrical storage units 3 have been switched to the first mode M1. Figure 4 The example illustration in c shows a scenario where all third electrical storage units 3 have the capacity to supply power to the power consumer 300. On the other hand, Figure 4 The example in d illustrates a scenario where all third electrical storage units 3 must be powered. Therefore, one or more third electrical storage units 3 can be configured to switch to either a first mode M1 or a second mode M2 ​​based on any of the following: the power level of the third electrical storage unit 3, the power capacity of the power supply, and the power required by the power consumer.

[0074] Therefore, in embodiments of the present invention, simultaneously at a first time point T1, the first mechanical switch 114 is configured to operate in a first mode M1, the second mechanical switch 124 is configured to operate in a second mode M2, and the third mechanical switch 134 is configured to operate in a third mode M3. Thereafter, the third mechanical switch 134 is configured to switch to either the first mode M1 or the second mode M2 ​​at a second time point T2 after the first time point T1. It should also be noted that the electrical coupling system 100 may include a second electrical switch 126 connected between the second electrical storage unit 2 and the second mechanical switch 124; and a third electrical switch 136 connected between the third electrical storage unit 3 and the third mechanical switch 134.

[0075] and, Figure 5 The sequence in which the first electrical storage unit 1, the second electrical storage unit 2, and the third electrical storage unit 3 can operate is shown when the power coupling function is to provide power to the power consumer 300 without any power interruption.

[0076] Therefore, according to embodiments of the present invention and with reference to Figure 5 In the initial state, simultaneously at the first time point T1, the first mechanical switch 114 operates in the first mode M1, the second mechanical switch 124 operates in the second mode M2, and the third mechanical switch 134 operates in the second mode M2. This means that at the first time point T1, the first electrical storage unit 1 is in current contact with the power supply 200, while the second electrical storage unit 2 and the third electrical storage unit 3 are in current contact with the power consumer 300. Therefore, when at least one of the second electrical storage unit 2 and the third electrical storage unit 3 feeds / transmits power to the power consumer 300, the first electrical storage unit 1 can be charged with power.

[0077] At the second time point T2, following the first time point T1, the third mechanical switch 134 is configured to switch to the first mode M1. Therefore, the third electrical storage unit 3 can load power from the power supply 200, while the second electrical storage unit 2 feeds power to the power consumer 300.

[0078] At a third time point T3, following the second time point T2, the first mechanical switch 114 is configured to switch to the second mode M2. Therefore, the first electrical storage unit 1 and / or the second electrical storage unit 2 can simultaneously supply power to the power consumer 300.

[0079] At a fourth time point T4, following the third time point T3, the second mechanical switch 124 is configured to switch to the first mode M1. Therefore, the second electrical storage unit 2 and the third electrical storage unit 3 can be charged with power, while the first electrical storage unit 1 continues to supply power to the power consumer 300. By continuing the example operation according to the disclosed time points T1, T2, T3, and T4, the power consumer 300 can be continuously fed power without any power interruption. Therefore, uninterrupted power supply with current isolation can be achieved.

[0080] At the following times, electrical storage units 1, 2, and 3 can switch / rotate to different operating modes, as well as... Figure 5 As shown, this corresponds to the fifth time point T5 and the sixth time point T6. Other examples can also implement different power coupling functions.

[0081] Figure 6 The diagram illustrates an electrical coupling system 100, which includes a control device 400 that communicates with and is connected to a set of mechanical switches 114, 124, 134 and a set of electrical switches 116, 126, 136. The mechanical and electrical switches can be connected to the control device 400 via suitable input 410 and output 420 control lines, control interfaces, or communication interfaces. The control device 400 can control the set of mechanical switches 114, 124, 134 and the set of electrical switches 116, 126, 136 via wired, wireless, or a combination of wired and wireless control means.

[0082] In embodiments of the invention, the control device 400 is configured to control the group of mechanical switches 114, 124, 134 and the group of electrical switches 116, 126, 136 via input control lines 410 and output control lines 420. The control device 400 may also obtain power data / information from the power source 200 and power consumer data / information from the power consumer 300, and control the operating modes of the mechanical and electrical switches based on the power information and / or power consumer information and / or information about the various electrical storage units of the electrical coupling system 100. The control device 400 may include any logic, processor, memory, communication interface, and / or software for controlling the components, components, and units of the electrical coupling system 100 disclosed herein.

[0083] Figure 7 An electrical system 500 according to an embodiment of the present invention is shown, comprising at least one power source 200, at least one power consumer 300, and at least one electrical coupling system 100. The electrical coupling system 100 is electrically connected between a transmitting port 210 and a receiving port 310. Exemplary power sources include wind power plants, solar power plants, power grids, batteries, etc. Exemplary power consumers include automobiles, trucks and base stations, batteries, building electrical systems, etc.

[0084] Finally, it should be understood that the present invention is not limited to the above embodiments, but also relates to and includes all embodiments within the scope of the appended independent claims.

Claims

1. An electrical coupling system (100) for electrically connecting a transmitting port (210) of a power source (200) to a receiving port (310) of a power consumer (300), the electrical coupling circuit (100) including a first electrical storage unit (1) connected to the transmitting port (210) and the receiving port (310) respectively via a first mechanical switch (114), wherein the first mechanical switch (114) is configured to operate in the following mode: In the first mode (M1), the first electrical storage unit (1) is in electrical contact with the transmitting port (210). In the second mode (M2), the first electrical storage unit (1) is in current contact with the receiving port (310), or The third mode (M3) is in which the first electrical storage unit (1) is in non-current contact with the transmitting port (210) and in non-current contact with the receiving port (310).

2. The electrical coupling system (100) according to claim 1, wherein the first mechanical switch (114) is configured to switch from a first mode (M1) to a second mode (M2) via a third mode (M3) and vice versa.

3. The electrical coupling system (100) according to claim 1 or 2, wherein the first mechanical switch (114) is configured to When the storage level of the first electrical storage cell (1) is lower than the first threshold, switch to the first mode (M1); and / or When the storage level of the first electrical storage cell (1) exceeds the second threshold, it switches to the second mode (M2).

4. The electrical coupling system (100) according to claim 3, wherein the first threshold is lower than the second threshold.

5. The electrical coupling system (100) according to any one of the preceding claims, wherein the first mechanical switch (114) is configured to switch to a third mode (M3) when: An error was detected in the first electrical storage unit (1); Perform measurements on the first electrical storage unit (1); and / or The first electrical storage unit (1) enters passive mode.

6. The electrical coupling system (100) according to any one of the preceding claims includes a first electrical switch (116) connected between the first electrical storage unit (1) and the first mechanical switch (114).

7. The electrical coupling system (100) according to claim 6, wherein when the first mechanical switch (114) switches to the first mode (M1) or the second mode (M2), the first electrical switch (116) is configured to be in its non-conducting state.

8. The electrical coupling system (100) according to claim 7, wherein the first electrical switch (116) is configured to be in its on state when the first mechanical switch (114) has been switched to the first mode (M1) or the second mode (M2).

9. The electrical coupling system (100) according to any one of claims 6 to 8, wherein when the first mechanical switch (114) is in the third mode (M3), the first electrical switch (116) is configured to be in its non-conducting state.

10. The electrical coupling system (100) according to any one of the preceding claims, comprising: A second electrical storage unit (2) is connected to the transmitting port (210) and the receiving port (310) respectively via a second mechanical switch (124); as well as The third electrical storage unit (3) is connected to the transmitting port (210) and the receiving port (310) respectively via the third mechanical switch (134).

11. The electrical coupling system (100) according to claim 10, wherein, At the same time point (T1), the first mechanical switch (114) is configured to operate in the first mode (M1), the second mechanical switch (124) is configured to operate in the second mode (M2), and the third mechanical switch (134) is configured to operate in the second mode (M2).

12. The electrical coupling system (100) according to claim 11, wherein the third mechanical switch (134) is configured to switch to the first mode (M1) at a second time point (T2) after the first time point (T1).

13. The electrical coupling system (100) according to claim 12, wherein the first mechanical switch (114) is configured to switch to the second mode (M2) at a third time point (T3) after the second time point (T2).

14. The electrical coupling system (100) according to claim 13, wherein the second mechanical switch (114) is configured to switch to the first mode (M1) at a fourth time point (T4) after the third time point (T3).

15. The electrical coupling system (100) according to claim 10, wherein, At the same time point (T1), the first mechanical switch (114) is configured to operate in the first mode (M1), the second mechanical switch (124) is configured to operate in the second mode (M2), and the third mechanical switch (134) is configured to operate in the third mode (M3).

16. The electrical coupling system (100) according to claim 15, wherein the third mechanical switch (134) is configured to switch to the first mode (M1) or the second mode (M2) at a second time point (T2) after the first time point (T1).

17. The electrical coupling system (100) according to any one of claims 10 to 16, comprising: A second electrical switch (126) connected between the second electrical storage unit (2) and the second mechanical switch (124); and A third electrical switch (136) is connected between the third electrical storage unit (3) and the third mechanical switch (134).

18. The electrical coupling system (100) according to any one of the preceding claims, comprising a control device (400) communicating with and configured to control the mechanical switches (114, 124, 134) and the electrical switches (116, 126, 136).

19. An electrical system (500), comprising: The power source (200), the power consumer (300), and the electrical coupling system (100) according to any one of the preceding claims.

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