Independent cooling structure of charging terminal

Abstract

The invention discloses an independent cooling structure for a charging terminal, and the structure comprises the charging terminal, and the side end of the charging terminal is provided with an installation space. The integrated water tank is connected with the charging terminal through the mounting space; the integrated water tank is provided with a liquid inlet and a liquid outlet, a flow channel is arranged in the integrated water tank, and the flow channel is connected with the liquid inlet and the liquid outlet to form a cooling loop. The two charging terminals are cooled by using the independent integrated water tank, and the first cooling assembly and the second cooling assembly are isolated from each other and can operate independently. The integrated water tank can be made of ceramic or metal according to whether cooling liquid is conductive or not. When the heating value of the charging terminal is not uniform, heat management can be carried out by independently adjusting the flow.

Description

Technical Field

[0001] The invention relates to the technical field of high-power charging of electric vehicles, and more particularly to an independent cooling structure for charging terminals. Background Art

[0002] With the continuous development of the new energy electric vehicle industry, electric vehicles have evolved from small family cars to heavy trucks. The battery capacity and range of electric vehicles are constantly increasing, and the demand for fast charging is becoming more urgent. Currently, the industry mainly increases the charging current to increase the charging speed.

[0003] During high-current charging, the charging terminals will generate a lot of heat. When the temperature is too high, the charging system will stop charging, which may cause a fire in serious cases. Therefore, when charging at high current, the charging terminals need to take cooling measures. Summary of the invention

[0004] The purpose of the present invention is to provide an independent cooling structure for charging terminals, in order to solve the technical problems in the background technology.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A charging terminal independent cooling structure, comprising:

[0007] A charging terminal, wherein a mounting space is provided at a side end of the charging terminal;

[0008] An integrated water tank, wherein the integrated water tank is connected to the charging terminal through the installation space; the integrated water tank is provided with a liquid inlet and a liquid outlet, and a flow channel is arranged inside, and the flow channel is connected with the liquid inlet and the liquid outlet to form a cooling circuit.

[0009] In some embodiments, the charging terminal is provided with a first cooling contact surface, a second cooling contact surface, a wire welding surface, and a limiting and fixing step, wherein the first cooling contact surface and the second cooling contact surface form an installation space; the wire welding surface is opposite to the first cooling contact surface; the limiting and fixing step and the wire welding surface are arranged on the same side.

[0010] In some embodiments, two ends of the integrated water tank are in contact with the first cooling contact surface and the second cooling contact surface respectively.

[0011] In some embodiments, it also includes a water pipe joint and a lock. The water pipe joint is provided with a sealing groove, a flange, and a pagoda. One end of the water pipe joint is respectively assembled in the liquid inlet and the liquid outlet of the water tank, and the sealing is achieved by a first sealing ring; an annular groove is arranged outside the liquid inlet and the liquid outlet of the water tank, and the lock fixes the water pipe joint by snapping the flange and the annular groove; the other end of the water pipe joint is connected to the liquid cooling water pipe, and the sealing is achieved by a second sealing ring, and a clamp is assembled at the pagoda position to fix the water pipe.

[0012] In some embodiments, the integrated water tank is fixed to the first cooling contact surface of the charging terminal by screws, and the charging wire is ultrasonically welded to the wire welding surface of the charging terminal.

[0013] In some embodiments, a fixing piece is also included, and the fixing piece cooperates with the limiting fixing step of the charging terminal to fix the charging terminal in the charging gun.

[0014] The present invention has the following beneficial effects:

[0015] 1. Under the national standard of temperature rise ≤50K, the charging current carrying capacity is greatly improved after this structure and the coolant cooperate with each other. The continuous maximum working current can be increased by more than 4 times the rated current of the wire with the same cross-section.

[0016] 2. When the charging terminal (101) generates heat unevenly, heat management can be performed by adjusting the flow rate of the cooling component individually to avoid abnormalities caused by uneven heating during charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the invention implementation scheme;

[0018] Figure 2 is a schematic diagram of a flow path circulation of an implementation scheme of the invention;

[0019] Figure 3 is a schematic diagram of a cooling assembly of an embodiment of the invention;

[0020] Figure 4 It is a schematic diagram of the cooling assembly assembly of the invention implementation scheme;

[0021] Figure 5 It is a schematic diagram of the explosion of the cooling assembly of the implementation scheme of the invention.

[0022] Figure 6 It is a schematic diagram of the charging terminal of the cooling component of the implementation scheme of the invention. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0024] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0025] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0026] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are orientations or positional relationships based on 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 referred device or element 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.

[0027] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or display that includes a series of steps or elements is not necessarily limited to those steps or elements explicitly listed but may include other steps or elements not explicitly listed or inherent to such process, method, product, or display.

[0028] The following will be combined Figure 1-6 , a charging terminal independent cooling structure involved in the embodiment of the present application is described in detail. It is worth noting that the following embodiments are only used to explain the present application and do not constitute a limitation on the present application.

[0029] Embodiment 1:

[0030] like Figure 1-6A structure for independently cooling a charging terminal in a high-current charging system of an electric vehicle includes: a charging terminal 101, an integrated water tank 201, a water pipe joint 301, a lock 401, a clamp 501, a first sealing ring 601, a second sealing ring 602, a screw 701, and a fixing part 801.

[0031] The integrated water tank 201 is provided with a liquid inlet and a liquid outlet, and a flow channel 203 is provided inside to connect with the liquid inlet and the liquid outlet to form a cooling circuit. An annular groove is provided outside the liquid inlet and the liquid outlet. A screw mounting hole and a step are provided outside.

[0032] The water pipe joint 301 is provided with a sealing groove, a flange, and a pagoda. One end of the water pipe joint is respectively assembled in the liquid inlet and the liquid outlet of the water tank, and is sealed by a first sealing ring 601. The lock buckle 401 fixes the water pipe joint 301 by buckling the flange and the annular groove. The other end of the water pipe joint 301 is connected to the liquid cooling water pipe 901, and is sealed by a second sealing ring 602. The clamp 501 is assembled at the pagoda position to fix the water pipe.

[0033] The charging terminal 101 is provided with a first cooling contact surface 102, a second cooling contact surface 103, a wire welding surface 104, and a position-limiting fixing step 105. The integrated water tank 201 is fixed to the cooling contact surface of the charging terminal by screws 701. The charging wire 1001 is ultrasonically welded to the wire welding surface 104 of the charging terminal 101. The fixing member 801 cooperates with the fixing step 105 of the charging terminal to fix the charging terminal 101 in the charging gun.

[0034] The parts are assembled as Figure 4 After the components shown in the figure are connected to the liquid cooling water pipe 901 and the charging wire 1001 / 1002 in the liquid cooling cable, the assembly is Figure 3 A first cooling assembly 202 and a second cooling assembly 202 are shown.

[0035] The two charging terminals 101 are charged with the maximum continuous current, and the integrated water tank 201 is connected to the cooling water pipe 901 by Figure 2 The flow channel indicated by the arrow continuously circulates the coolant, which is driven by a water pump.

[0036] During the charging process, the heat generated by the charging terminal 101 is transferred to the integrated water tank 201 through the first cooling contact surface 102 and the second cooling contact surface 103. The coolant exchanges heat with the integrated water tank 201 in the flow channel 203, and finally takes away the heat generated by the charging terminal 101 during the charging process, thereby reducing the temperature of the charging terminal.

[0037] During the above charging process, if it is detected that the temperature of the charging terminal 101 is higher than that of the adjacent charging terminal 101, the coolant flow in the first cooling component 202 corresponding to the charging terminal 101 on the high temperature side can be increased to improve the cooling capacity and balance the temperatures of the charging terminals 101 on both sides.

[0038] The two charging terminals are cooled by independent integrated water tanks. The first cooling component and the second cooling component are isolated from each other and can operate independently. The integrated water tank can be made of ceramic or metal depending on whether the coolant is conductive. When the charging terminals generate uneven heat, thermal management can be performed by adjusting the flow rate individually.

[0039] When the coolant is a conductive liquid (such as ethylene glycol aqueous solution), the integrated water tank can be made of materials with both insulation and high thermal conductivity, including but not limited to ceramics. The integrated water tank is directly in contact with the charging terminal and does not require additional insulation measures. This solution increases the heat dissipation contact area, reduces the heat transfer loss of additional insulating parts, and has high heat transfer efficiency.

[0040] When the coolant is a non-conductive liquid (such as deionized water), the integrated water tank can be made of metal material to further improve the thermal conductivity efficiency.

[0041] The flow channel in the integrated water tank made of ceramic material is formed by the "lost wax method", and the flow channel in the integrated water tank made of metal material is processed by the "welding" process. The integrated structure has reliable sealing performance and avoids the risk of coolant leakage in the split assembly flow channel.

[0042] The above description is only a preferred embodiment of the present invention and is used to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A charging terminal independent cooling structure, characterized in that: include: A charging terminal, wherein a mounting space is provided at a side end of the charging terminal; an integrated water tank, the integrated water tank being connected to the charging terminal through the installation space; A flow channel is arranged inside the integrated water tank, and is provided with a liquid inlet and a liquid outlet. The flow channel is connected with the liquid inlet and the liquid outlet to form a cooling circuit.

2. The independent cooling structure for charging terminals according to claim 1, characterized in that: The charging terminal arrangement includes: A first cooling contact surface and a second cooling contact surface, which are arranged opposite to each other to form the installation space; A wire welding surface, arranged on the back side of the charging terminal; The limiting fixing step is used to cooperate with the fixing parts of the charging gun.

3. The independent cooling structure for charging terminals according to claim 2, characterized in that: Two ends of the integrated water tank are in contact with the first cooling contact surface and the second cooling contact surface respectively.

4. The independent cooling structure for charging terminals according to claim 2, characterized in that: It also includes a water pipe joint and a lock, the water pipe joint is provided with a sealing groove, a flange, and a pagoda, one end of the water pipe joint is respectively assembled in the liquid inlet and the liquid outlet of the water tank, and the sealing is achieved by a first sealing ring; an annular groove is arranged outside the liquid inlet and the liquid outlet of the water tank, and the lock fixes the water pipe joint by buckling the flange and the annular groove; the other end of the water pipe joint is connected to the liquid cooling water pipe, and the sealing is achieved by a second sealing ring, and a clamp is assembled at the pagoda position to fix the water pipe.

5. The independent cooling structure for charging terminals according to claim 2, characterized in that: The integrated water tank is fixed to the first cooling contact surface of the charging terminal by screws, and the charging wire is ultrasonically welded to the wire welding surface of the charging terminal.

6. The independent cooling structure for charging terminals according to claim 2, characterized in that: It also includes a fixing piece, which cooperates with the limiting fixing step of the charging terminal to fix the charging terminal in the charging gun.

7. The independent cooling structure for charging terminals according to claim 1, characterized in that: The material of the integrated water tank is ceramic or metal; When the coolant is a conductive liquid, a ceramic material is used; when the coolant is a non-conductive liquid, a metal material is used.

Images