Energy storage type tramcar charging system and control method thereof

Abstract

The invention discloses an energy storage type tramcar charging system which comprises a tramcar, a charging device and a control device. A power receiving device is arranged at the top of the tramcar, and the charging device can dynamically act in the vertical direction; the control device is used for controlling the charging device to move downwards in the vertical direction to be in contact with the power receiving device for charging; an elastic assembly is further arranged in the charging device and used for enabling the charging device and the power receiving device to recover the initial state after charging is finished. The system is composed of a simple up-and-down movable charging structure, and by simplifying an equipment interface of a vehicle end, the operation is simple, the construction cost is saved, more vehicle-mounted energy storage devices can be arranged in the saved vehicle space, and the endurance level and traction power of the vehicle are improved; in addition, the invention further provides an automatic rapid charging control method, and the operation and maintenance cost of the tramcar can be reduced by controlling the energy storage type tramcar charging system.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy storage rail transit, and in particular relates to an energy storage tram charging system and a control method thereof. Background Art

[0002] With the development and expansion of urban construction, more and more cities have begun to operate or plan trams to facilitate people's travel. Among them, energy storage trams, which are powered by on-board energy storage devices, can achieve contactless operation, have a braking energy recovery rate of more than 80%, are green and energy-saving, and have low construction costs, becoming the mainstream.

[0003] However, due to limitations such as roof space and vehicle axle weight, energy storage trams in the existing technology can only be equipped with a limited number of energy storage devices, which makes the vehicle model not adaptable to lines with long slopes, long station distances, or even charging at the first and last stations. This limits the use scenarios of energy storage trams, is not conducive to technology promotion, and has become a problem that practitioners and technicians urgently need to solve.

[0004] Currently, the industry mainly adopts two methods: developing new energy storage power sources, or equipping tram bodies with devices similar to existing pantographs. However, the long development cycle required often leads to increased costs. Traditional pantographs occupy unnecessary space on the roof and are difficult to charge efficiently.

[0005] Therefore, it is a technical problem that urgently needs to be solved in the field to provide a tram charging system with a simple structure and easy operation. The system consists of a simple structure, which can simplify the device interface on the vehicle side, save vehicle space to arrange more on-board energy storage devices, improve the vehicle's endurance and traction power, and play a role in simple operation and cost savings. Summary of the invention

[0006] In order to solve the problem of difficulty in charging energy storage type trams in the above-mentioned prior art, the present invention aims to provide a tram charging system and a control method thereof with simple structure and easy operation. The system is composed of a simple structure, which can simplify the equipment interface on the vehicle side, is simple to operate, and saves costs. The saved space can be used to arrange more on-board energy storage devices, thereby improving the vehicle's endurance and traction power.

[0007] The present invention provides an energy storage type tram charging system, the specific technical scheme is as follows, including: a tram vehicle, a charging device, and a control device; A power receiving device is provided on the top of the tram vehicle, and the charging device can move dynamically in the vertical direction; The control device is used to control the charging device to move vertically downward to contact the power receiving device for charging; The charging device is also provided with an elastic component for restoring the charging device and the power receiving device to an initial state after charging is completed.

[0008] Preferably, the charging device comprises: a mounting assembly, a charging plate, and a coupler; The power receiving device is a plate-shaped structure, and is protrudingly arranged on the top of the tram vehicle; The mounting components are cross-shaped, with the charging plates disposed at both ends of the bottom thereof, the charging plates contacting the outer surface of the power receiving device for charging, and the mounting components are cross-shaped, and the connection between the upper and lower parts can rotate; The couplers are arranged at both ends of the upper part of the installation component, and the opening and closing of the couplers are used to control the up and down movement of the installation component and the contact condition between the charging plate and the power receiving device.

[0009] Preferably, the elastic component is arranged on the upper part of the charging device, and the couplers are connected to both ends of the elastic component; When charging is completed, the coupler is in a closed state, and the elastic component causes the mounting components to return to an X-shaped cross-shaped state.

[0010] Preferably, the coupler is an electromagnetic coupler, which is electrically connected to the control device. By controlling the power-on state of the coupler, the couplers attract each other, so that the charging plate maintains a constant pressure contact with the power receiving device.

[0011] Preferably, the length of the charging plate is greater than that of the power receiving device, so that the power receiving device can obtain a larger contact space with the charging plate.

[0012] Preferably, the charging device comprises: a main body, a power transmission unit, a connecting rod, and a charging plate; The power receiving device is a planar structure and is arranged on the top of the tram vehicle; The power transmission unit is arranged inside the main body, and the power transmission unit is used to drive the connecting rod to move in the vertical direction; The charging plate is provided at the bottom of the connecting rod and is charged by connecting with the power receiving device.

[0013] Preferably, the power transmission unit specifically includes: a motor, a gear box, and an elastic component; The motor converts electrical energy into mechanical energy, and drives the connecting rod to move up and down in the vertical direction under the transmission action of the gear box, so that the charging plate contacts the power receiving device; The elastic component is arranged between the gear box and the connecting rod.

[0014] Preferably, a guide unit for guiding the connecting rod is further provided on the main body to ensure the movement trajectory of the connecting rod in the vertical direction.

[0015] Preferably, the power receiving device is circular in design, and the surface area of ​​the power receiving device is larger than the surface area of ​​the contact surface of the charging plate. At the same time, the present invention also provides a control method for an energy storage type tram charging system including the above energy storage type tram charging system, and the specific steps are as follows: (1) After the control device detects that the tram vehicle enters the charging station, it sends a control signal to the charging device; (2) After receiving the control signal, the charging device descends in a vertical direction and contacts the power receiving device disposed on the top of the tram vehicle to start charging; (3) After charging is completed, the tram vehicle sends a signal to the control device, and the charging device moves upward with the assistance of the elastic component to restore the initial state.

[0016] Compared with the prior art, the technical solution has the following beneficial effects: providing a simple-structured and easy-to-operate energy storage tram charging system, which is composed of a simple upper and lower movable charging structure, and by simplifying the equipment interface on the vehicle side, the operation is simple, the construction cost is saved, and the saved vehicle space can be used to arrange more on-board energy storage devices, thereby improving the vehicle's endurance and traction power; In addition, another object of the present invention is to provide an automatic fast charging control method, which can reduce the cost of vehicle operation and maintenance by controlling the energy storage type tram charging system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of an energy storage type tram charging system in a specific embodiment; Figure 2 for Figure 1 Schematic diagram of the charging state structure of the energy storage tram charging system; Figure 3 It is a schematic structural diagram of an energy storage type tram charging system in another specific embodiment; Figure 4 for Figure 3 Schematic diagram of the charging status structure of the energy storage tram charging system.

[0019] The specific figures are: 10-Tram vehicles; Figure 1 and Figure 2 The reference numerals of the first embodiment are: 100 - tram charging system; 110 - power receiving device; 112 - power receiving board; 120 - charging device; 122 - mounting assembly; 124 - charging board; 126 - electromagnetic coupler; 128 - elastic assembly; 130 - control device; Figure 2 and Figure 3 The figure marks of the second embodiment are as follows: 200 - tram charging system; 210 - power receiving device; 214 - power receiving plate; 220 - charging device; 230 - control device; 212 - insulator; 222 - main body; 222a - guide unit; 224 - power transmission unit; 224a - motor; 224b - gear box; 226 - connecting rod; 228 - charging plate; 229 - shock absorber assembly. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application are clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] It should be noted that when an element is referred to as being "fixed on" or "set on" another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0022] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0024] 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 conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0025] Please refer to Figure 1 to Figure 2 , the energy storage type tram charging system 100 provided in the first specific embodiment of the technical solution of the present invention is described, and its structure includes: a tram vehicle 10, a charging device 120, and a control device 130; The top of the tram vehicle 10 is provided with a power receiving device 110, and the charging device 120 can move dynamically in the vertical direction; The control device 130 is used to control the charging device 120 to move vertically downward to contact the power receiving device 110 for charging; The charging device 120 is further provided with an elastic component 128 for restoring the charging device 120 and the power receiving device 110 to an initial state after charging is completed.

[0026] As a preference, in the present technical solution, the various embodiments mainly differ in the arrangement and structure type of the charging device 120 and the power receiving device 110 correspondingly matched and contacted therewith. Specifically, in the present embodiment, Figure 1 The specific structures of the charging device 120 and the power receiving device 110 are as follows: The power receiving device 110 is a plate-shaped structure, specifically as follows Figure 1 and Figure 2The power receiving plate 112 shown in the figure is protrudingly arranged on the top of the tram vehicle 10. The setting form of the power receiving plate 112 can be fixedly arranged to maintain the protruding state, or it can be lifted and extended and recovered to be arranged on the top of the tram vehicle 10, so that it can only extend when receiving the charging signal generated by the control device 130. This specific form is not limited in this embodiment. At the same time, since the power receiving plate 112 has a certain height, it overcomes the height error of the tram vehicle 10 caused by load or wheel wear, so as to maintain a more stable charging effect after contacting the charging device 120 described later; In this embodiment, the charging device 120 includes: a mounting assembly 122, a charging plate 124, and a coupler 126; Specific as Figure 1 and Figure 2 As shown in the figure, the style of the mounting assembly 122 in this embodiment is specifically an X-shaped mutually crossed structure, and the charging plates 124 are provided at both ends of the bottom thereof, and the charging plates 124 are charged by contacting with the power receiving device 110, specifically with the outer surface of the power receiving plate 112. At the same time, in this embodiment, the mounting assembly 122 is rotatably connected at the connection between the upper and lower parts in the mutually crossed state, realizing a rotation connection in all directions, and can also realize the charging of the tram vehicle 10 under the curvature condition; The couplers 126 are provided at both ends of the upper part of the mounting assembly 122. The function of the couplers 126 is mainly to control the up and down movement of the mounting assembly 122 by controlling the opening and closing thereof. Specifically, when the couplers 126 on both sides are in a closed state, the mounting assembly 122 is transformed from an X-shaped cross-shaped state to a straight state and moves downward in a vertical direction. At this time, the charging plate 124 is in contact with the power receiving device 110, specifically the power receiving plate 112. The opening and closing states of the coupler 126 are used to control whether the charging state of the power receiving plate 112 is activated or not.

[0027] Preferably, the internal structure of the charging device 120 in this embodiment is further limited. In this embodiment, Figure 1 and Figure 2 As shown, the elastic component 128 is disposed on the upper part of the charging device 110, specifically between the couplers 126, and both ends of the elastic component 128 are connected to the couplers 126 respectively; After charging is completed, the elastic force of the elastic component 128 can restore the mounting component 122 from a straight line state to an X-shaped cross-shaped state.

[0028] Furthermore, the specific form of the coupler 126 in this example is further limited. In this embodiment, the coupler 126 is selected as an electromagnetic coupler 126. After the electromagnetic coupler 126 is electrically connected to the control device 130, the electromagnetic force is generated by controlling whether the electromagnetic coupler 126 is powered on. When the electromagnetic coupler 126 is powered on, they attract each other. At the same time, since the mounting assembly 122 is an X-shaped cross structure, the charging plate 124 can also maintain a constant pressure to clamp the receiving plate 112.

[0029] Furthermore, the specific structure of the charging plate 124 in this embodiment is further limited. In this embodiment, the length of the charging plate 124 is greater than the length of the power receiving device 110, that is, the length of the power receiving plate 112. Through such a design, even if the tram vehicle 10 is not stopped at the exact position during charging, the power receiving plate 112 of the power receiving device 110 and the charging plate 124 of the charging device 120 can be in contact with each other, thereby achieving the charging effect and avoiding the need for accurate position control during charging.

[0030] At the same time, the present invention also provides a control method for an energy storage type tram charging system including the above energy storage type tram charging system. In this embodiment, combined with Figure 1 and Figure 2 The specific steps are as follows: (1) After the control device 130 detects that the tram vehicle 10 enters the charging station, it sends a control signal to the charging device 120; (2) After the charging device 120 receives the control signal, the electromagnetic coupler 126 is energized to generate an attractive force so that the mounting assembly 122 changes from an X-shaped cross state to a straight state and is lowered in a vertical direction, so that the charging plate 124 contacts the power receiving device 110, specifically the power receiving plate 112, disposed on the top of the tram vehicle 10, and charging begins; (3) After charging is completed, the tram vehicle 10 sends a signal to the control device 130, the electromagnetic coupler 126 in the charging device 120 is powered off, and the mounting component 122 that has lost its attractive force moves upward with the assistance of the elastic component 128 to restore the initial X-shaped crossing state.

[0031] Please refer to Figure 3 to Figure 4 , the energy storage type tram charging system 200 provided by the second specific embodiment of the technical solution of the present invention is described, and its structure mainly includes: the tram vehicle 10, the charging device 220, and the control device 230; In this embodiment, a power receiving device 220 is provided on the top of the tram vehicle 10. The power receiving device is specifically a flat plate structure. Figure 3 and Figure 4 As shown, the receiving plate 224 is arranged on the top of the tram vehicle 10, and an insulator 212 is arranged between the receiving plate 224 and the tram vehicle 10, and the insulator 212 is used to shield the surrounding of the charging plate 224 to avoid discharging of the tram vehicle 10 during the charging process; In this embodiment, the charging device 220 specifically includes: a main body 222, a power transmission unit 224, a connecting rod 226, and a charging plate 228; like Figure 3 and Figure 4 As shown, in this embodiment, the main body 222 is a box-type structure, in which the power transmission unit 224 is disposed, and the power transmission unit 224 is mechanically connected to the connecting rod 226 to drive the connecting rod 226 to move in the vertical direction; The bottom of the connecting rod 226 is connected with the charging plate 228 , and the charging plate 228 is charged by connecting with the power receiving device 220 , specifically the power receiving plate 224 .

[0032] As a preference, the specific structure of the power transmission unit 224 in this embodiment is further limited, and the power transmission unit 224 specifically includes: a motor 224a, a gear box 224b, and an elastic component 229; The connection relationship is that the motor 224a converts electrical energy into mechanical energy by connecting to an external power source, and under the transmission action of the gear box 224b, drives the connecting rod 226 to move up and down in the vertical direction relative to the tram vehicle 10, so that the charging plate 228 can contact and charge with the power receiving device 210, specifically the power receiving plate 214; Furthermore, the elastic component 229 is further provided between the gear box 224b and the connecting rod 226. In this embodiment, the elastic component 229 is specifically a shock absorber component 229. When the connecting rod 226 moves downward, the shock absorber component 229 is stretched. By means of the connecting rod 226 structure that is movable in the vertical direction, the charging plate 228 moves downward, thereby overcoming the height error of the tram vehicle 10 caused by load or wheel wear, and the charging plate 228 is brought into contact with the power receiving plate 214 at a constant pressure through the shock absorber assembly 229, so that charging is more stable and the recovery process is faster after charging is completed.

[0033] Preferably, the structure of the main body 222 in this embodiment is further limited. In this embodiment, Figure 3 and Figure 4 As shown, the main body 222 is also provided with the guide unit 222a for guiding the connecting rod 226. The guide unit 222a is sleeved on the outer surface of the connecting rod 226 to ensure that the movement trajectory of the connecting rod 226 in the vertical direction always remains in a vertical state to avoid tilting. The specific guiding method in this embodiment is: there are threads on the inner circumference of the guide unit 222a and the outer circumference of the connecting rod 226, and the two are threadedly connected. Other connection methods can also be used in other embodiments.

[0034] Furthermore, the structure of the power receiving device 210 in this embodiment, specifically the power receiving plate 214, is further limited. In this embodiment, the power receiving plate 214 is circular in shape, and the surface area of ​​the power receiving plate 214 is larger than the surface area of ​​the contact surface of the charging plate 228. Through such a design, even if the parking position of the tram vehicle 10 deviates slightly, the power receiving plate 214 of the power receiving device 210 and the charging plate 228 of the charging device 220 can still be in contact, thereby achieving a stable charging effect.

[0035] At the same time, the present invention also provides a control method for an energy storage type tram charging system including the above energy storage type tram charging system. In this embodiment, combined with Figure 3 and Figure 4 The specific steps are as follows: (1) After the control device 230 detects that the tram vehicle 10 enters the charging station, it sends a control signal to the charging device 220; (2) After the charging device 220 receives the control signal, the motor 224a in the main body 222 starts to rotate, and under the transmission action of the gear box 224b, the connecting rod 226 is vertically lowered under the guidance of the guide unit 222a, so that the charging plate 228 contacts the power receiving device 210, specifically the power receiving plate 214, provided on the top of the tram vehicle 10, and charging starts; (3) After charging is completed, the tram vehicle 10 sends a signal to the control device 230, and the charging device 220, specifically the connecting rod 226, moves upward to restore the initial state with the assistance of the motor 224a and the shock absorber assembly 229.

[0036] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An energy storage type tram charging system, characterized in that: include: Tram vehicles, charging devices, and control devices; A power receiving device is provided on the top of the tram vehicle, and the charging device can move dynamically in the vertical direction; The control device is used to control the charging device to move vertically downward to contact the power receiving device for charging; The charging device is also provided with an elastic component for restoring the charging device and the power receiving device to an initial state after charging is completed.

2. The energy storage type tram charging system according to claim 1, characterized in that: The charging device comprises: a mounting assembly, a charging plate, and a coupler; The power receiving device is a plate-shaped structure, and is protrudingly arranged on the top of the tram vehicle; The mounting components are cross-shaped, with the charging plates disposed at both ends of the bottom thereof, the charging plates contacting the outer surface of the power receiving device for charging, and the mounting components are cross-shaped, and the connection between the upper and lower parts can rotate; The couplers are arranged at both ends of the upper part of the installation component, and the opening and closing of the couplers are used to control the up and down movement of the installation component and the contact condition between the charging plate and the power receiving device.

3. The energy storage type tram charging system according to claim 2, characterized in that: The elastic component is arranged on the upper part of the charging device, and the couplers are connected to both ends of the elastic component; When charging is completed, the coupler is in a closed state, and the elastic component causes the mounting components to return to an X-shaped cross-shaped state.

4. The energy storage type tram charging system according to claim 3 is characterized in that: The coupler is an electromagnetic coupler, which is electrically connected to the control device. By controlling the power-on state of the coupler, the couplers attract each other, so that the charging plate maintains a constant pressure contact with the power receiving device.

5. The energy storage type tram charging system according to claim 4, characterized in that: The length of the charging plate is greater than the length of the power receiving device, so that the power receiving device can obtain a larger contact space with the charging plate.

6. The energy storage type tram charging system according to claim 1, characterized in that: The charging device comprises: a main body, a power transmission unit, a connecting rod, and a charging plate; The power receiving device is a planar structure and is arranged on the top of the tram vehicle; The power transmission unit is arranged inside the main body, and the power transmission unit is used to drive the connecting rod to move in the vertical direction; The charging plate is provided at the bottom of the connecting rod and is charged by connecting with the power receiving device.

7. The energy storage type tram charging system according to claim 6, characterized in that: The power transmission unit specifically includes: a motor, a gear box, and an elastic component; The motor converts electrical energy into mechanical energy, and drives the connecting rod to move up and down in the vertical direction under the transmission action of the gear box, so that the charging plate contacts the power receiving device; The elastic component is arranged between the gear box and the connecting rod.

8. The energy storage type tram charging system according to claim 7, characterized in that: The main body is also provided with a guide unit for guiding the connecting rod to ensure the movement track of the connecting rod in the vertical direction.

9. The energy storage type tram charging system according to claim 8, characterized in that: The power receiving device is circular in design, and the surface area of ​​the power receiving device is larger than the surface area of ​​the contact surface of the charging plate.

10. A control method for an energy storage type tram charging system, used to control the energy storage type tram charging system according to any one of claims 1 to 9, characterized in that: The specific steps are as follows: (1) After the control device detects that the tram vehicle enters the charging station, it sends a control signal to the charging device; (2) After receiving the control signal, the charging device descends in a vertical direction and contacts the power receiving device disposed on the top of the tram vehicle to start charging; (3) After charging is completed, the tram vehicle sends a signal to the control device, and the charging device moves upward with the assistance of the elastic component to restore the initial state.

Images