Vehicle-end liquid cooling connection device, battery installation part and electric vehicle

Abstract

The present invention discloses a vehicle-end liquid-cooled connection device, a battery installation part and an electric vehicle, which are used to be connected to a battery pack, and include: a mounting seat arranged in a receiving cavity at the bottom of the electric vehicle; and a connection valve fixed on the mounting seat. One end of the connection valve is connected to a liquid supply device of the coolant, and the other end is used to be connected to the battery pack. An openable and closable flow passage is formed inside the connection valve, and the flow direction of the flow passage is parallel to the plane direction of the vehicle body length direction of the electric vehicle, so as to realize the connection with the liquid-cooled pipeline of the electric vehicle after the battery pack is installed horizontally on the electric vehicle. According to this solution, during the process of installing the battery pack to the bottom of the electric vehicle, when the battery pack is horizontally moved in place, while the installation of the battery pack is realized, the sealed connection between the connection valve of the electric vehicle and the liquid-cooled connection joint of the battery pack can be realized, ensuring the sealing performance and preventing the occurrence of liquid leakage. The installation and connection process is simple and efficient.

Description

[0001] This application claims the priority of Chinese Patent Application No. 202010981928.8 with the filing date of September 17, 2020. This application incorporates the full text of the above-mentioned patent application by reference. Technical Field

[0002] The present invention relates to the field of electric vehicle battery swapping, and particularly to a vehicle-end liquid cooling connection device, a battery installation part, and an electric vehicle. Background Art

[0003] At present, there are mainly two ways to obtain energy for electric vehicles: charging and battery swapping. Since the battery swapping method can achieve rapid replenishment of electric energy, reduce the waiting time of customers, and improve the utilization rate of battery swapping stations. In addition, the battery can be centrally charged at night, realizing "peak shaving and energy storage" of the power load. At the same time, it improves the comprehensive utilization efficiency of power equipment, extends the service life of the battery, and has high promotion value and economic significance.

[0004] In a battery-swapping electric vehicle, a replaceable battery pack generally adopts a movable installation method, and the battery pack can be removed and replaced with a new one at any time. The cooling pipe provided on the quick-change battery pack is connected to the cooling system on the electric vehicle, and the heat balance of the quick-change battery pack is achieved by using the circulation of the coolant. However, due to the limitation of the locking and positioning of the locking mechanism of the battery pack, the plug-in structure on the current quick-change battery pack and the quick-change bracket assembly has imperfect liquid tightness, and there may be problems such as dripping, which may cause safety hazards such as electric leakage. Therefore, the design of the liquid cooling connector on the replaceable battery pack is greatly restricted. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the above problems and provide a vehicle-end liquid cooling connection device, a battery installation part, and an electric vehicle.

[0006] The present invention solves the above technical problems through the following technical solutions:

[0007] The present invention discloses a vehicle-end liquid cooling connection device for connecting with a battery pack to deliver coolant into the liquid cooling pipeline in the battery pack, including:

[0008] A mounting seat disposed in a receiving cavity at the bottom of the electric vehicle; and

[0009] A connection valve fixed to the mounting seat, one end of the connection valve is connected to the coolant supply device, and the other end is used to connect with the battery pack. An openable and closable flow channel is formed inside the connection valve, and the flow direction of the flow channel is parallel to the plane direction of the body length direction of the electric vehicle to achieve communication with the liquid cooling pipeline of the electric vehicle after the battery pack is installed horizontally on the electric vehicle.

[0010] According to this solution, during the process of installing the battery pack at the bottom of the electric vehicle, when the battery pack is horizontally moved into place, while achieving the installation of the battery pack, the connection valve of the electric vehicle can be hermetically connected to the liquid cooling connection joint of the battery pack, ensuring tightness and preventing liquid leakage. The installation and connection process is simple and efficient.

[0011] Preferably, the mounting seat is arranged on the bottom surface or side surface of the accommodation cavity of the electric vehicle, and the plane direction of the mounting seat is perpendicular to the plane direction of the battery pack and perpendicular to the flow direction.

[0012] According to this solution, by fixing the mounting seat in a vertical manner relative to the electric vehicle and setting the flow direction of the flow channel of the connection valve perpendicular to the mounting seat, that is, the flow direction of the flow channel of the connection valve is parallel to the horizontal direction of the electric vehicle, it is possible to achieve rapid hermetic connection between the connection valve and the liquid cooling connection joint of the battery pack while the battery pack is lifted into place.

[0013] Preferably, the battery pack is detachably connected to the bottom of the electric vehicle through a locking device. When the battery pack lifted into place from the bottom of the electric vehicle moves along the longitudinal direction of the vehicle body of the electric vehicle until the locking shaft on the battery pack engages with the locking groove of the locking device, the flow channel is opened to connect the connection valve to the liquid cooling pipeline of the battery pack.

[0014] According to this solution, when the battery pack is horizontally moved until the locking shafts on both sides of the battery pack engage with the locking grooves of the locking device, that is, the locking shafts of the battery pack are locked in the corresponding locking grooves, the connection valve of the electric vehicle and the liquid cooling pipeline connection joint of the battery pack are gradually brought into contact and then sealed and connected, and the flow channel is opened.

[0015] Preferably, a positioning component is provided on the mounting seat to position the connection valve and the liquid cooling connection device of the battery pack.

[0016] According to this solution, accurate and rapid docking between the connection valve and the liquid cooling connection joint of the battery pack is achieved through the positioning component.

[0017] Preferably, the positioning component includes two positioning holes or two positioning posts respectively arranged on both sides of the connection valve.

[0018] Preferably, a sealing ring surrounding the connection valve is provided on the mounting seat.

[0019] According to this solution, a sealing ring is provided on the periphery of the connecting valve to ensure a further sealed connection between the connecting valve and the liquid cooling connecting joint of the battery pack. Even if a slight leakage occurs, it can be ensured that the liquid will not leak out and affect other components.

[0020] Preferably, the connecting valve comprises a housing in which the circulation channel is formed, and a valve core which is telescopically movably disposed in the circulation channel to open and close the circulation channel.

[0021] According to this solution, when the liquid-cooling connection joint of the battery pack is sealed with the connection valve, the flow channel can be quickly opened by moving the position of the valve core in the shell. The opening of the flow channel and the sealing connection are achieved simultaneously to avoid leakage.

[0022] Preferably, the shell has a first end and a second end arranged along the flow direction, the first end is an open structure and the second end is provided with a plurality of through holes, and the flow channel is formed between the open structure and the plurality of through holes.

[0023] Preferably, the valve core includes a core body extending from the first end to the second end, and a valve plug which is telescopically mounted on an end of the core body corresponding to the first end and is used to seal the core body and the shell, and the flow channel is opened or closed by telescopic movement of the valve plug.

[0024] According to this solution, the position of the core body is kept unchanged in the shell of the connecting valve, and the flow channel between the shell and the core body is opened or closed by moving the valve plug sealed between the end face of the core body and the shell along the axial direction of the core body, thereby ensuring that the flow channel is opened and closed and sealed at the same time.

[0025] Preferably, the end surface of the core is recessed at a predetermined depth position of the first end portion, and a guide structure is provided in a region of the shell that is higher than the end surface of the core.

[0026] According to this solution, while the positioning component outside the connecting valve realizes positioning, the guiding structure at the front end of the core body can realize more precise docking between the liquid-cooling connecting connector of the battery pack and the connecting valve, thereby improving the sealing connection efficiency.

[0027] Preferably, one end of the valve core is fixedly connected to the second end portion and the other end is telescopically and movably connected to the second end portion in the circulation channel, and the valve core is sealedly connected to the first end portion.

[0028] According to this solution, in the connecting valve housing, the flow channel is opened or closed by setting the valve core that is sealed between one end and the housing to be telescopically movable relative to the housing, thereby ensuring that the flow channel is opened and closed and sealed at the same time.

[0029] The present invention also discloses a battery installation part, which includes the vehicle-end liquid cooling connection device described in any of the above solutions.

[0030] Preferably, the number of the vehicle-end liquid cooling connection devices is two, one of which serves as the input part of the coolant, and the other serves as the output part of the coolant.

[0031] Preferably, the two vehicle-end liquid cooling connection devices are respectively arranged at opposite ends of the accommodation cavity of the electric vehicle.

[0032] According to this solution, by arranging the input part and the output part of the liquid cooling connection device at both ends of the accommodation cavity of the electric vehicle, while optimizing the layout of the liquid cooling pipeline on the electric vehicle, the layout of the liquid cooling pipeline in the battery pack can also be optimized, reducing the occupied space of the liquid cooling pipeline and improving the heat exchange efficiency.

[0033] The present invention also discloses an electric vehicle, which includes the vehicle-end liquid cooling connection device described in any of the above solutions, or the battery installation part described in any of the above solutions.

[0034] On the basis of conforming to the common knowledge in the art, the above preferred conditions can be combined arbitrarily to obtain various preferred examples of the present invention.

[0035] The positive and progressive effects of the present invention are as follows: during the process of installing the battery pack at the bottom of the electric vehicle, when the battery pack is horizontally moved into place, while realizing the installation of the battery pack, the sealing connection between the connection valve of the electric vehicle and the liquid cooling connection joint of the battery pack can be realized, ensuring the sealing performance and preventing liquid leakage. The installation and connection process is simple and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic structural diagram of the liquid cooling connection assembly in Embodiment 1 according to the present invention;

[0037] Figure 2 It is a schematic structural diagram of the first liquid cooling connection device in Embodiment 1 according to the present invention;

[0038] Figure 3 It is a schematic structural diagram of the second liquid cooling connection device in Embodiment 1 according to the present invention;

[0039] Figure 4 It is a schematic diagram of an installation method of the vehicle-end liquid cooling connection device installed on the battery installation part in Embodiment 2 according to the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0040] The present invention will be more clearly and completely described below by way of examples in conjunction with the drawings, but the present invention is not limited to the scope of the described examples.

[0041] Embodiment 1

[0042] As Figures 1 to 3 shown, Embodiment 1 discloses a liquid cooling connection assembly 5000, which is used between a liquid supply device and a liquid cooling pipeline. Through the liquid cooling connection assembly 5000, the connection between the liquid supply device and the liquid cooling pipeline is realized, so that the coolant in the liquid supply device can flow into the liquid cooling pipeline and return to the liquid supply device, thereby realizing heat exchange in the area where the liquid cooling pipeline is arranged.

[0043] Specifically, the liquid cooling connection assembly 5000 includes a first liquid cooling connection device 5100 and a second liquid cooling connection device 5200. The first liquid cooling connection device 5100 and the second liquid cooling connection device 5200 are used in cooperation. One of them is set as the connection joint of the liquid supply device, and the other is set as the connection joint of the liquid cooling pipeline. While realizing the sealed connection through the liquid cooling connection assembly 5000, the conduction of the liquid cooling pipeline is also realized, so that the coolant can flow.

[0044] As Figure 1 and 2 shown, the first liquid cooling connection device 5100 includes a first mounting seat 5110 and a first connection valve 5120.

[0045] As Figure 1 and 3 shown, the second liquid cooling connection device 5200 includes a second mounting seat 5210 and a second connection valve 5220.

[0046] The first mounting seat 5110 is a flat plate-like structure, specifically rectangular, and is used to install and fix the first connection valve 5120.

[0047] The first connection valve 5120 is fixed on the first mounting seat 5110. An openable and closable flow channel is formed inside the first connection valve 5120, and the flow direction of the flow channel is perpendicular to the plane direction of the first mounting seat 5110.

[0048] The second mounting seat 5210 is a flat plate-like structure, specifically rectangular, and is used to install and fix the second connection valve 5220.

[0049] The second connection valve 5220 is fixed on the second mounting seat 5210. An openable and closable flow channel is formed inside the second connection valve 5220, and the flow direction of the flow channel is perpendicular to the plane direction of the second mounting seat 5210.

[0050] In actual use, one end of the first connection valve 5120 is connected to the liquid cooling pipeline, and one end of the second connection valve 5220 is connected to the liquid supply device. Through the cooperative connection of the first connection valve 5120 and the second connection valve 5220, the flow channels in the first connection valve 5120 and the second connection valve 5220 are simultaneously opened, enabling the coolant in the liquid supply device to flow into the liquid cooling pipeline.

[0051] As Figure 2 shown, the first connection valve 5120 includes a first housing 5121 with a flow channel formed inside and a first valve core 5122 that is telescopically and movably arranged in the flow channel to open and close the flow channel.

[0052] The first housing 5121 is an aerial structure, having a first end and a second end arranged along the flow direction. The first end is an open structure, and the second end is provided with a plurality of through holes. A flow channel is formed between the open structure and the plurality of through holes.

[0053] The first valve core 5122 includes a first core body 5122a extending from the first end of the first housing 5121 to the second end, and a valve plug 5122b that is telescopically and movably sleeved on one end of the first core body 5122a corresponding to the first end and is used to seal the first core body 5122a and the first housing 5121. The flow channel is opened or closed by the telescopic movement of the valve plug 5122b.

[0054] As Figure 3 shown, the second connection valve 5220 includes a second housing 5221 with a flow channel formed inside and a second valve core 5222 that is telescopically and movably arranged in the flow channel to open and close the flow channel.

[0055] The second housing 5221 is an aerial structure, and the outer diameter of the second housing 5221 matches the inner diameter of the first housing 5121. The second housing 5221 also has a first end and a second end arranged along the flow direction. The first end is an open structure, and the second end is provided with a plurality of through holes. A flow channel is formed between the open structure and the plurality of through holes.

[0056] One end of the second valve core 5222 is fixedly connected to the first end of the second housing 5221, and the other end is telescopically and movably connected to the second end of the second housing 5221 in the flow channel. The second valve core 5222 is sealingly connected to the first end. The corresponding flow channel is opened or closed by the telescopic movement of the second valve core 5222.

[0057] Also, as Figure 2 shown, a first positioning component 5130 is provided on the first mounting base 5110. As Figure 3As shown in the figure, a second positioning member 5230 is provided on the second mounting seat 5210. When the first liquid cooling connection device 5100 is connected to the second liquid cooling connection device 5200, positioning is performed through the first positioning member 5130 and the second positioning member 5230 to ensure the accuracy of the connection and improve the connection efficiency. Specifically, the specific structural form of the first positioning member 5130 can be two positioning holes respectively arranged on both sides of the first connection valve 5120, and the specific structural form of the second positioning member 5230 can be two positioning posts respectively arranged on both sides of the second connection valve 5220; or the first positioning member 5130 and the second positioning member 5230 can be arranged in the opposite way, or other positioning structures can be adopted, as long as the positioning requirements are met.

[0058] Another example is Figure 2 As shown in the figure, the end face of the first core body 5122a is recessed at a predetermined depth position of the first end face of the first end portion, and a guiding structure is provided in the area where the first housing 5121 is higher than the end face of the first core body 5122a. The guiding structure can be a guiding inclined surface. Of course, it can also be any other structure with a guiding function. In this way, while the first positioning member 5130 and the second positioning member 5230 achieve positioning, the guiding structure at the front end of the first core body 5122a can achieve more precise docking of the second connection valve 5220 and the first connection valve 5120, and improve the sealing connection efficiency.

[0059] When the first connection valve 5120 is connected to the second connection valve 5220, the edge of the second housing 5221 pushes against the valve plug 5122b of the first valve core 5122 to make the valve plug 5122b retract inward relative to the first core body 5122a. At the same time, the first core body 5122a pushes against the second valve core 5222 to make the second valve core 5222 retract toward the inside of the second housing 5221, so that the flow channels of the first housing 5121 and the second housing 5221 are opened simultaneously, and since the second housing 5221 is inserted into the first housing 5121, the sealing connection between the first housing 5121 and the second housing 5221 is realized.

[0060] For example Figure 3 As shown in the figure, a sealing ring 5240 surrounding the second connection valve 5220 is further provided on the second mounting seat 521. After the first connection valve 5120 is connected to the second connection valve 5220, the sealing ring 5240 is squeezed to keep the first mounting seat 5110 and the second mounting seat 5210 in a sealed connection, ensuring the sealing performance of the first connection valve 5120 and the second connection valve 5220. In this way, even if there is a slight liquid leakage phenomenon, it can ensure that the liquid will not leak out to pose a threat or impact on other components in the use environment.

[0061] The liquid cooling connection assembly 5000 according to Embodiment 1 of the present invention ensures the openable / closable connectivity and sealing performance of the flow channel through the mating connection of the first liquid cooling connection device 5100 and the second liquid cooling connection device 5200, avoiding risks such as coolant leakage. The liquid cooling connection assembly 5000 can be applied in all environments where liquid cooling pipelines are connected, such as the pipeline connection between the battery pack of an electric vehicle and the liquid supply device on the vehicle, and so on.

[0062] In another embodiment, the sealing ring can also be arranged on the first mounting seat, and the sealed connection can also be achieved, which can be set arbitrarily according to actual requirements.

[0063] Embodiment 2

[0064] As Figure 4 shown, Embodiment 2 of the present invention discloses another battery mounting part 7000, which is used in an electric vehicle to mount the battery pack 6000 on the electric vehicle. The battery mounting part 7000 has the first liquid cooling connection device 5100 or the second liquid cooling connection device 5200 described in Embodiment 1 above, and the first liquid cooling connection device 5100 or the second liquid cooling connection device 5200 is provided on the battery mounting part 7000 as the vehicle-end liquid cooling connection device. In this vehicle-end liquid cooling connection device, the first mounting seat 5110 and the second mounting seat 5210, as well as the first connection valve 5120 and the second connection valve 5220, are collectively referred to as the mounting seat and the connection valve.

[0065] When the battery mounting part 7000 is connected to the battery pack 6000, the vehicle-end liquid cooling connection device and the battery-end liquid cooling connection device on the battery pack 6000 are in a sealed connection state, so as to introduce the coolant provided by the liquid supply device on the electric vehicle into the liquid cooling pipeline in the battery pack 6000, so as to exchange heat with the battery modules during the charging and discharging process in the battery pack 6000 and provide a suitable working temperature environment for the battery pack 6000. Here, the liquid cooling pipeline on the battery pack 6000 is connected with the second liquid cooling connection device 5200 or the first liquid cooling connection device 5100 that matches the vehicle-end liquid cooling connection device on the electric vehicle. That is to say, the first liquid cooling connection device 5100 or the second liquid cooling connection device 5200 is respectively connected between the battery pack 6000 and the battery mounting part of the electric vehicle, and the two can be interchangeably arranged.

[0066] The vehicle-end liquid cooling connection device on the battery installation part 7000 of this Embodiment 2. Specifically, the mounting seat is arranged on the top surface or side surface of the accommodation cavity of the electric vehicle. The connection valve is fixed on the mounting seat. The plane direction of the mounting seat is perpendicular to the plane direction where the vehicle body length direction is located, and the plane direction of the mounting seat is perpendicular to the flow direction. That is to say, the flow direction of the flow channel is parallel to the plane direction of the battery pack 6000, so as to realize the connection with the liquid cooling pipeline of the electric vehicle after the battery pack 6000 is installed horizontally on the electric vehicle.

[0067] Here, the battery pack 6000 is detachably connected to the bottom of the electric vehicle through a locking device. The locking device includes a locking mechanism with an L-shaped locking groove and a plurality of locking shafts arranged on both sides of the battery pack 6000. The battery pack 6000 is lifted to the proper position from the bottom of the electric vehicle and then further moves along the vehicle body length direction of the electric vehicle, that is, vertically and horizontally along the direction of the L-shaped locking groove. When the locking shaft on the battery pack 6000 cooperates with the locking groove of the locking mechanism, the battery pack 6000 is successfully locked. When the battery pack 6000 is vertically lifted to the proper position, the vehicle-end liquid cooling connection device and the battery-end liquid cooling connection device are exactly aligned. As the battery pack 6000 moves horizontally, the vehicle-end liquid cooling connection device of the electric vehicle is connected to the battery-end liquid cooling connection device on the battery pack 6000 and the flow channel of the connection valve is opened.

[0068] According to the battery installation part of this Embodiment 2, during the process of installing the battery pack 6000 to the bottom of the electric vehicle, after the battery pack 6000 is vertically lifted to the proper position, as the battery pack 6000 continuously moves horizontally, the connection valve of the electric vehicle and the battery-end liquid cooling connection device of the battery pack 6000 are gradually abutted to a sealed connection from the initial contact state and the flow channel is opened. While realizing the installation of the battery pack 6000, the sealed connection of the liquid cooling pipeline can be realized, and the installation and connection process is simple and efficient.

[0069] According to the solution of this Embodiment 2, by fixing the mounting seat vertically relative to the electric vehicle and setting the flow direction of the flow channel of the connection valve perpendicular to the mounting seat, that is to say, the flow direction of the flow channel of the connection valve is parallel to the horizontal direction of the electric vehicle, it can be realized that the battery-end liquid cooling connection device and the vehicle-end liquid cooling connection device of the electric vehicle are quickly and sealedly connected while the battery pack 6000 is lifted to the proper position upward.

[0070] In another embodiment, the battery mounting portion 7000 has all the features of the above-described embodiments, and further has: the number of vehicle-end liquid cooling connection devices is two, one of which serves as the input portion of the coolant and the other serves as the output portion of the coolant. By separately arranging the input portion and the output portion of the liquid cooling connection device, the liquid cooling optical path setting on the electric vehicle is made more flexible, and at the same time, the liquid cooling pipeline setting method inside the battery pack 6000 is made more flexible. Preferably, the two vehicle-end liquid cooling connection devices are respectively arranged at opposite ends of the accommodation cavity of the electric vehicle. By arranging the input portion and the output portion of the liquid cooling connection device at both ends of the accommodation cavity of the electric vehicle, while optimizing the layout of the liquid cooling pipeline on the electric vehicle, the layout of the liquid cooling pipeline in the battery pack 6000 can also be optimized, reducing the occupied space of the liquid cooling pipeline and improving the heat exchange efficiency.

[0071] In another embodiment, an electric vehicle is also disclosed, which has all or part of the features of the vehicle-end liquid cooling connection device or the battery mounting portion shown in the above-described Embodiments 1 and 2.

[0072] Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that this is only an example, and the protection scope of the present invention is defined by the appended claims. Without departing from the principles and essence of the present invention, those skilled in the art can make various changes or modifications to these embodiments, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A vehicle-end liquid cooling connection device is used to connect with a battery pack so as to convey coolant into a liquid cooling pipeline in the battery pack. It is characterized in that Comprising: A mounting seat, which is arranged in a receiving cavity at the bottom of an electric vehicle, and the mounting seat is arranged on the bottom surface of the receiving cavity of the electric vehicle; And A connecting valve, which is fixed on the mounting seat. One end of the connecting valve is connected to a liquid supply device of the coolant, and the other end is used to be connected to the battery pack. A switchable flow passage is formed inside the connecting valve, and the flow direction of the flow passage is parallel to the plane direction of the vehicle body length direction of the electric vehicle, so as to realize the connection with the liquid cooling pipeline of the electric vehicle after the battery pack is installed horizontally on the electric vehicle; The connecting valve includes a housing in which the flow passage is formed and a valve core that is telescopically movably arranged in the flow passage to open and close the flow passage; The housing has a first end and a second end arranged along the flow direction. The valve core includes a core body extending from the first end to the second end, and the end face of the core body is recessed at a predetermined depth position of the first end.

2. The vehicle-end liquid cooling connection device according to claim 1, wherein The plane direction of the mounting seat is perpendicular to the plane direction of the battery pack and perpendicular to the flow direction.

3. The vehicle-end liquid cooling connection device according to claim 1, wherein The battery pack is detachably connected to the bottom of the electric vehicle through a locking device. When the battery pack rises from the bottom of the electric vehicle until the locking shaft on the battery pack cooperates with the locking groove of the locking device, the flow passage is opened to connect the connecting valve with the liquid cooling pipeline of the battery pack.

4. The vehicle-end liquid cooling connection device according to claim 1, wherein The mounting seat is provided with positioning components, and the liquid cooling connection device of the connecting valve and the battery pack is positioned through the positioning components.

5. The vehicle-end liquid cooling connection device according to claim 4, wherein The positioning components include two positioning holes or two positioning posts respectively arranged on both sides of the connecting valve.

6. The vehicle-end liquid cooling connection device according to claim 1, wherein The mounting seat is provided with a sealing ring arranged around the connecting valve.

7. The vehicle-end liquid cooling connection device according to claim 1, wherein The first end is an open structure and the second end is provided with a plurality of through holes, and the flow passage is formed between the open structure and the plurality of through holes.

8. The vehicle-end liquid cooling connection device according to claim 7, wherein The valve core further includes a valve plug that is telescopically movably sleeved on one end of the core body corresponding to the first end and is used to seal the core body and the housing, and the flow passage is opened or closed by the telescopic movement of the valve plug.

9. The vehicle-end liquid cooling connection device according to claim 8, wherein A guiding structure is arranged in the area where the housing is higher than the end face of the core body.

10. The vehicle-end liquid cooling connection device according to claim 7, wherein One end of the valve core is fixedly connected to the second end and the other end is telescopically movably connected to the second end in the flow passage, and the valve core is sealingly connected to the first end.

11. A battery installation part, characterized in that, It includes the vehicle-end liquid-cooled connection device according to any one of claims 1-10.

12. The battery mounting portion according to claim 11, characterized in that, The number of the vehicle-end liquid-cooled connection devices is two, one of which serves as an input part of the coolant and the other serves as an output part of the coolant.

13. The battery mounting portion according to claim 12, wherein, The two vehicle-end liquid-cooled connection devices are respectively arranged at opposite ends of the accommodation cavity of the electric vehicle.

14. An electric vehicle, characterized in that, It includes the vehicle-end liquid-cooled connection device according to any one of claims 1-10; or, it includes the battery installation part according to any one of claims 11-13.

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