Charging pile power switching system and charging station

Abstract

The utility model provides a charging pile power switching system and a charging station. The charging pile power switching system comprises a plurality of charging module groups, a plurality of charging terminals, a switching module and a control module. Each charging module group is correspondingly connected with one charging terminal, and every two charging module groups of the plurality of charging module groups are connected through the switching module; and the switching module is used for controlling connection and disconnection among the plurality of charging module groups. The charging station comprises a plurality of charging pile power switching systems. Power allocation can be completed through connection and disconnection of the switching module according to different application scenes, the power utilization rate of the charging module group is effectively improved, the situation that a very large power distribution capacity is configured for all charging terminals to perform high-power charging is avoided, resources are saved, and on the premise of effectively controlling the cost, the cost is reduced. Therefore, all charging terminals can have the high-power output capability.

Description

Technical Field

[0001] The utility model relates to the technical field of charging devices, in particular to a charging pile power switching system and a charging station. Background Art

[0002] New energy vehicles have been rapidly popularized around the world with their clean and environmentally friendly power sources and excellent conversion efficiency. Due to the development of electric vehicles, many places in my country now have a large number of car charging piles for electric car owners to use, but the long charging time has been criticized. At present, the battery capacity of electric vehicles is getting larger and larger, and some cars can even reach 1,000km in range, which has more stringent requirements on charging time. With the continuous improvement of battery temperature control technology, the miniaturization of power modules, and the technical requirements for charging speed, charging with higher current has become an inevitable trend.

[0003] At present, the maximum current of the standard charging gun is 250A, but after adding the liquid cooling system, it can achieve short-term charging with a current of 600A or more. However, after a period of time (currently: 10 minutes or 20 minutes), the current will drop, resulting in the output power of the DC charging pile not meeting the voltage and current requirements of the vehicle to be charged. At present, most vehicles can only charge about 60 to 90kW, and some vehicles require high-power (480kW, 720kW) charging. The full-matrix power switching matrix used in existing charging piles requires the setting of more switching switches, resulting in increased costs and waste of resources, and it is impossible to allocate power according to actual conditions, and it is impossible to meet the charging needs of both high-power output and low-power output at the same time. It is difficult to meet different vehicle models, and the utilization rate of the power module is low. Utility Model Content

[0004] In view of the shortcomings of the prior art mentioned above, the utility model provides a charging pile power switching system and a charging station, aiming to solve the technical problems in the prior art that the charging power switching system cannot allocate power according to actual conditions, the utilization rate of the power module is low, and more switching switches need to be set, resulting in increased costs and waste of resources.

[0005] To achieve the above object, the utility model provides a charging pile power switching system, comprising: a plurality of charging module groups, a plurality of charging terminals, a switching module and a control module, wherein the control module is electrically connected to the plurality of charging terminals and the switching module respectively;

[0006] Each charging module group is connected to a charging terminal, and the multiple charging module groups are connected to each other through the switching module; the switching module is used to control the connection and disconnection between the multiple charging module groups;

[0007] The currently put into use charging module group is used to charge the power terminal connected to the charging terminal; other charging module groups connected to the currently put into use charging module group are combined with the currently put into use charging module group through the switching module to charge the power terminal together.

[0008] As a more preferred manner, each charging module group includes a plurality of charging modules connected in parallel.

[0009] As a more preferred manner, the type of the switching module includes a first DC contactor.

[0010] As a more preferred manner, the charging module groups at the head and tail ends are connected via a switching module; each charging module group is connected to one or two directly adjacent charging module groups via a switching module, and is also connected to one or two charging module groups separated by one charging module group via a switching module.

[0011] As a more preferred manner, a group of second DC contactors is provided on each of the charging terminals, and by controlling the attraction of the second DC contactors, the corresponding charging terminal can charge the power terminal connected thereto.

[0012] As a more preferred manner, the types of the multiple charging terminals include super charging terminals that can call all charging module groups and ordinary charging terminals that can call some charging module groups.

[0013] As a more preferred embodiment, a liquid cooling module is provided on the super charging terminal.

[0014] As a more preferred manner, the control module further includes a temperature detection module for detecting the inlet and outlet air temperatures of the charging pile power switching system.

[0015] As a more preferred manner, the control module further includes a heat dissipation control module for dissipating heat for the charging pile power switching system.

[0016] In order to achieve the above-mentioned object, the utility model also provides a charging station, comprising: a plurality of charging pile power switching systems as described above.

[0017] As described above, the charging pile power switching system and charging station involved in the utility model have the following beneficial effects:

[0018] The utility model charging pile power switching system includes: multiple charging module groups, multiple charging terminals, switching modules and control modules. Each charging module group is connected to a charging terminal, and the two charging module groups of the multiple charging module groups are connected through the switching module; the switching module is used to control the connection and disconnection between the multiple charging module groups. The charging module group currently put into use is used to charge the power terminal connected to the charging terminal; other charging module groups connected to the currently put into use charging module group are combined with the currently put into use charging module group through the switching module to charge the power terminal together. The utility model charging pile power switching system can complete power allocation through the connection and disconnection of the switching module according to different application scenarios, can flexibly configure the type of charging terminal, and effectively improve the power utilization rate of the charging module group, that is, it can meet the charging needs of high power output and low power output, and at the same time avoid the configuration of a very large distribution capacity for all charging terminals to be able to charge at high power, saving resources, and realizing that all charging terminals can have the ability of high power output under the premise of effectively controlling costs.

[0019] The charging station of the utility model includes a plurality of charging pile power switching systems as described above, and can be built into charging stations of different sizes according to actual needs, and can cover a plurality of charging parking spaces, realizing full power allocation while also meeting the needs of most fast and slow charging models. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Shown is a wiring diagram of the charging pile power switching system of the utility model. DETAILED DESCRIPTION

[0021] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0022] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions that can be implemented in this utility model, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that can be produced by the utility model and the purposes that can be achieved, should still fall within the scope of the technical content disclosed by the utility model. The following detailed description should not be considered restrictive, and the scope of the embodiments of this application is limited only by the claims of the published patents. The terms used here are only for describing specific embodiments and are not intended to limit this application. Spatial related terms, such as "upper", "lower", "left", "right", "below", "below", "lower", "above", "upper", etc., can be used in the text to facilitate the description of the relationship between an element or feature shown in the figure and another element or feature.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "hold" and the like 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 a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Furthermore, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless there is an indication to the contrary in the context. It should be further understood that the terms "comprise", "include" indicate the presence of the described features, operations, elements, components, items, kinds, and / or groups, but do not exclude the presence, occurrence or addition of one or more other features, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Exceptions to this definition will only occur when the combination of elements, functions or operations is inherently mutually exclusive in some way.

[0025] In order to make the purpose, technical solution and advantages of the utility model more clear, the technical solution in the embodiment of the utility model is further described in detail through the following embodiments and the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0026] like Figure 1 As shown, the utility model provides a charging pile power switching system, comprising: a plurality of charging module groups, a plurality of charging terminals, a switching module and a control module, wherein the control module is electrically connected to the plurality of charging terminals and the switching module respectively;

[0027] Each charging module group is connected to a charging terminal, and the multiple charging module groups are connected to each other through the switching module; the switching module is used to control the connection and disconnection between the multiple charging module groups;

[0028] The currently put into use charging module group is used to charge the power terminal connected to the charging terminal; other charging module groups connected to the currently put into use charging module group are combined with the currently put into use charging module group through the switching module to charge the power terminal together.

[0029] In this embodiment, if Figure 1 As shown, each charging module group includes several charging modules connected in parallel. The power specifications of the charging modules include but are not limited to: 20kW, 30kW or 40kW, etc. For example, the charging pile power switching system is equipped with 6 charging module groups, each charging module corresponds to a charging terminal, and a total of 6 charging terminals. If the output power of each charging module group is 60kW, each charging module group can be composed of 3 20kW charging modules in parallel, or each charging module group can be composed of 2 30kW charging modules in parallel, thereby forming a 360kW charging pile power switching system. If the output power of each charging module group is 80kW, each charging module group can be composed of 4 20kW charging modules in parallel, or each charging module group can be composed of 2 40kW charging modules in parallel, thereby forming a 480kW charging pile power switching system. If the output power of each charging module group is 120kW, each charging module group can be composed of 6 20kW charging modules in parallel, or each charging module group can be composed of 4 30kW charging modules in parallel, or each charging module group can be composed of 3 40kW charging modules in parallel, thus forming a 720kW charging pile power switching system.

[0030] Specifically, in this embodiment, the charging pile power switching system is exemplified by setting 6 charging module groups. In actual applications, the charging module groups can configure the number and output power of the charging module groups according to actual conditions, thereby forming a charging pile power switching system with different output powers. The utility model does not limit the number and output power of the charging module groups. Below, the structure and principle of the utility model are explained by taking the setting of 6 charging module groups as an example.

[0031] In this embodiment, if Figure 1As shown, the six charging module groups are charging module groups 1-6, and the corresponding connected charging terminals are charging terminals 1-6.

[0032] In this embodiment, if Figure 1 As shown, the type of the switching module includes a first DC contactor. The first DC contactors 1-10 are non-polar DC contactors. A group of first DC contactors is provided on the connection line between each charging module group and the corresponding connected charging terminal. A non-polar DC contactor is a contactor that controls the on and off of DC power without distinguishing between positive and negative poles.

[0033] In this embodiment, if Figure 1 As shown, the charging module groups at the head and tail ends are connected via a switching module; each charging module group is connected to one or two directly adjacent charging module groups via a switching module, and is also connected to one or two charging module groups separated by one charging module group via a switching module.

[0034] In this embodiment, if Figure 1 As shown, the charging module group 1 is connected to the charging module group 6 through the first DC contactor 6. The charging module group 1 is connected to the charging module group 2 and the charging module group 3 through the first DC contactor 1 and the first DC contactor 3, respectively. The charging module group 2 is connected to the charging module group 3 and the charging module group 4 through the first DC contactor 2 and the first DC contactor 8, respectively. The charging module group 3 is connected to the charging module group 4 and the charging module group 5 through the first DC contactor 10 and the first DC contactor 9, respectively. The charging module group 4 is connected to the charging module group 5 and the charging module group 6 through the first DC contactor 4 and the first DC contactor 7, respectively. The charging module group 5 is connected to the charging module group 6 through the first DC contactor 5, respectively.

[0035] In this embodiment, if Figure 1 As shown, a group of second DC contactors is provided on each of the charging terminals, and by controlling the attraction of the second DC contactors, the corresponding charging terminal charges the power terminal connected thereto. A second DC contactor 51 is provided on the connection line between the positive pole of the charging module group 1 and the charging terminal 6, and a second DC contactor 51 is provided on the connection line between the negative pole of the charging module group 1 and the charging terminal 6. Similarly, a group of second DC contactors 52-56 are provided on the connection line between the charging module group 2-6 and the corresponding charging terminal 2-6. The second DC contactors 51-56 are polarized DC contactors. A polarized DC contactor is a contactor that controls the on and off of DC power while distinguishing between positive and negative poles.

[0036] In this embodiment, in the charging state, the control module detects the charging information of the power terminal connected to the charging terminal. When it is detected that the charging power of the power terminal is greater than the output power of the current charging module group, the control switching module connects the idle charging module groups in the order from near to far with the currently invested charging module group and merges them, so that the current charging terminal charges the user vehicle to be charged connected to it.

[0037] It should be noted that the charging pile power switching system provided by the utility model is a hardware structure, and each component inside it is also a hardware component. The utility model can be used alone or in combination with existing programs or software to implement the relevant functions of threshold judgment and instruction sending. However, the utility model itself does not involve any software technology update.

[0038] In this embodiment, the types of the multiple charging terminals include super charging terminals that can call all charging module groups and ordinary charging terminals that can call some charging module groups. The super charging terminal is provided with a liquid cooling module, which is an efficient heat dissipation method. It takes away and dissipates the heat generated by the charging module group through liquid circulation. The liquid cooling module is provided in the super charging terminal to better control the temperature of the charging module group and avoid the influence of overheating or overcooling on the performance and service life of the charging module group.

[0039] In this embodiment, if Figure 1 As shown, charging terminal 3 and charging terminal 4 are super charging terminals, equipped with liquid-cooled charging guns, and can call all charging module groups 1-6. When the charging power required by the power terminal is large, the power terminal is connected to charging terminal 3 or 4, and the idle charging module groups are called in order from near to far. When the adjacent charging terminals are in the charging state, consider calling the idle charging module groups from other positions across. Take the connection between the power terminal and the charging terminal 3 as an example to illustrate, the second DC contactor 53 is energized, and the charging module group 3 charges the power terminal connected to the charging terminal 3. When all the charging module groups are idle, all the charging module groups can be deployed according to demand. The control module detects the charging information of the power terminal connected to the charging terminal 3. When all the charging module groups need to be called, the first DC contactor 2, 10, 3, 9, 5 is energized, and the charging module group 3 merges the charging module groups 2, 4, 1, 5, 6 in sequence to charge the power terminal together. The charging principle of the power terminal connected to the charging terminal 4 is the same as that of the charging terminal 3, which will not be repeated here.

[0040] In this embodiment, if Figure 1As shown, if charging terminal 3 and charging terminal 4 are both charging, first DC contactors 3 and 2 are energized, second DC contactor 53 is energized, and charging terminal 3 calls charging module groups 1, 2, and 3 to charge the power terminal together. First DC contactors 4 and 7 are energized, second DC contactor 54 is energized, and charging terminal 4 calls charging module groups 4, 5, and 6 to charge the power terminal together.

[0041] In this embodiment, if Figure 1 As shown, charging terminal 1, charging terminal 2, charging terminal 5, and charging terminal 6 are common charging terminals. In order from near to far, up to three charging module groups can be called. When adjacent charging terminals are in charging state, consider calling idle charging module groups from other positions across. Take the connection between the power terminal and charging terminal 1 as an example to illustrate that charging module groups 2, 3, and 6 can be called. If the adjacent charging terminal 2 is in charging state, charging module group 3, or charging module group 3 + charging module group 4 can be called.

[0042] It is worth mentioning that the charging pile power switching system of the utility model can complete power allocation by connecting and disconnecting the switching modules according to different application scenarios, and can flexibly configure the type of charging terminal, effectively improving the power utilization rate of the charging module group, that is, it can meet the charging needs of both high-power output and low-power output. At the same time, it also avoids the configuration of a very large distribution capacity in order for all charging terminals to be able to charge at high power, saving resources, and realizing that all charging terminals can have the ability to have high-power output under the premise of effectively controlling costs.

[0043] Furthermore, the charging pile power switching system of the utility model can be applied to various charging fields such as integrated machines and split machines, so that the charging piles have flexible combinations, and charging stations of different sizes can be built to cover multiple charging parking spaces. From the perspective of economic benefits, compared with the full-matrix power switching matrix, the number of contactors is reduced while achieving full-power switching. The number of contactors required for the existing full-matrix power switching is: 6*6*2=72 contactors, and the charging pile power switching system of the utility model only requires 10*2=20, which reduces the cost, achieves full power allocation, and can also meet most fast and slow charging models.

[0044] In this embodiment, the control module further includes a temperature detection module for detecting the inlet and outlet air temperatures of the charging pile power switching system. The temperature detection module includes but is not limited to: a temperature sensor, a temperature detector, an infrared thermometer, a high and low temperature humidity test chamber, etc.

[0045] In this embodiment, the control module further includes a heat dissipation control module for dissipating heat from the charging pile power switching system. The heat dissipation control module includes but is not limited to: a radiator, a cooling fan, a thermostat, etc.

[0046] In this embodiment, the control module includes a power detection module for detecting charging information of a user vehicle to be charged connected to the charging terminal. The power detection module includes but is not limited to: a power meter, a power sensor, a power tester, and the like.

[0047] The utility model also provides a charging station, comprising: a plurality of charging pile power switching systems as described above.

[0048] The charging pile power switching system of the utility model can complete power allocation by connecting and disconnecting the switching modules according to different application scenarios, and can flexibly configure the type of charging terminal, effectively improving the power utilization rate of the charging module group, that is, it can meet the charging needs of high-power output and low-power output, and at the same time avoids the configuration of a very large distribution capacity in order for all charging terminals to be able to charge at high power, saving resources, and realizing that all charging terminals can have the ability of high-power output under the premise of effectively controlling costs. The charging station of the utility model includes a plurality of charging pile power switching systems as described above, which can be built into charging stations of different sizes according to actual needs, can cover multiple charging parking spaces, and realize full power allocation while also meeting most fast and slow charging models. In summary, the utility model effectively overcomes the various shortcomings of the prior art and has a high industrial utilization value.

[0049] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A charging pile power switching system, characterized in that: include: A plurality of charging module groups, a plurality of charging terminals, a switching module and a control module, wherein the control module is electrically connected to the plurality of charging terminals and the switching module respectively; Each charging module group is connected to a charging terminal, and any two charging module groups of the multiple charging module groups are connected via the switching module; The switching module is used to control the connection and disconnection between the multiple charging module groups; The currently put into use charging module group is used to charge the power terminal connected to the charging terminal; other charging module groups connected to the currently put into use charging module group are combined with the currently put into use charging module group through the switching module to charge the power terminal together.

2. The charging pile power switching system according to claim 1, characterized in that: Each charging module group includes a plurality of charging modules connected in parallel.

3. The charging pile power switching system according to claim 1, characterized in that: The type of the switching module includes a first DC contactor.

4. The charging pile power switching system according to claim 1, characterized in that: The charging module groups at the head and tail ends are connected via a switching module; each charging module group is connected to one or two directly adjacent charging module groups via a switching module, and is also connected to one or two charging module groups separated by one charging module group via a switching module.

5. The charging pile power switching system according to claim 1, characterized in that: A group of second DC contactors is arranged on each of the charging terminals, and the corresponding charging terminal can charge the power terminal connected thereto by controlling the attraction of the second DC contactors.

6. The charging pile power switching system according to claim 1, characterized in that: The types of the multiple charging terminals include super charging terminals that can call all charging module groups and ordinary charging terminals that can call some charging module groups.

7. The charging pile power switching system according to claim 6, characterized in that: The super charging terminal is provided with a liquid cooling module.

8. The charging pile power switching system according to claim 1, characterized in that: The control module also includes a temperature detection module for detecting the inlet and outlet air temperatures of the charging pile power switching system.

9. The charging pile power switching system according to claim 1, characterized in that: The control module also includes a heat dissipation control module for dissipating heat for the charging pile power switching system.

10. A charging station, characterized in that: include: A plurality of charging pile power switching systems as described in any one of claims 1 to 9.

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