Vertical docking vehicle end liquid cooling connection device, battery installation part and electric vehicle

Abstract

The present invention discloses a vertical docking vehicle-end liquid cooling connection device, a battery mounting portion, and an electric vehicle. The liquid cooling connection device includes: a mounting seat, which is arranged in a receiving cavity at the bottom of the electric vehicle; and a connecting valve, which is fixed to the mounting seat. One end of the connecting valve is connected to a coolant supply device, and the other end is used to connect to a battery pack. An openable and closable flow channel is formed inside the connecting valve, and the flow direction of the flow channel is perpendicular to the plane direction of the length direction of the electric vehicle body, so that the battery pack can be connected to the liquid cooling pipeline of the electric vehicle after being installed to the electric vehicle from the bottom up. According to this solution, in the process of installing the battery pack to the bottom of the electric vehicle, the battery pack is lifted from the bottom up. When the battery pack is lifted up into place, the battery pack can be installed and the connection valve of the electric vehicle and the liquid cooling connection joint of the battery pack can be connected at the same time, ensuring the sealing and preventing leakage. The installation and connection process is simple and efficient.

Description

[0001] This application claims priority to Chinese patent application No. 202010981928.8 filed on September 17, 2020. The entire disclosure of the aforementioned patent application is incorporated herein by reference. Technical Field

[0002] The present invention relates to the field of battery replacement for electric vehicles, and in particular to a vertical docking vehicle-end liquid cooling connection device, a battery mounting portion and an electric vehicle. Background Art

[0003] Currently, electric vehicles primarily obtain energy through charging and battery swapping. Battery swapping allows for rapid energy replenishment, reducing customer wait times and increasing the utilization rate of battery swapping stations. Furthermore, batteries can be centrally charged at night, achieving peak load shaving and energy storage. This improves the overall utilization efficiency of power equipment and extends battery life, making it highly valuable and economically viable for adoption.

[0004] In battery-swap electric vehicles, the replaceable battery pack is generally installed in a removable manner, and the battery pack can be removed and replaced with a new one at any time. The cooling pipe installed on the quick-swap battery pack is connected to the cooling system of the electric vehicle, and the circulation of the coolant is used to achieve thermal balance of the quick-swap battery pack. However, the current quick-swap battery pack and the connector structure on the quick-swap bracket assembly are not liquid-tight due to the locking positioning limitations of the battery pack's locking mechanism, which may cause dripping problems, which will lead to safety hazards such as 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 vertical docking vehicle-end liquid cooling connection device, a battery mounting portion and an electric vehicle.

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

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

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

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

[0010] According to this solution, during the process of installing the battery pack on the bottom of the electric vehicle, the battery pack is lifted from the bottom to the top. When the battery pack is lifted into place, the connection valve of the electric vehicle and the liquid-cooled connection joint of the battery pack can be sealed and connected simultaneously to ensure the sealing and prevent 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 accommodating cavity of the electric vehicle, and the plane direction of the mounting seat is parallel to the plane direction of the battery pack and perpendicular to the flow direction.

[0012] According to this solution, by fixing the mounting base in a horizontal manner relative to the electric vehicle and keeping the flow direction of the flow channel of the connecting valve perpendicular to the mounting base, it is possible to achieve a quick sealed connection between the connecting valve and the liquid-cooling connecting joint of the battery pack while the battery pack is lifted upward 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 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 circulation channel is opened to connect the connecting valve with the liquid cooling pipeline of the battery pack.

[0014] According to this solution, when the battery pack is lifted upward 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 connecting valve of the electric vehicle and the liquid cooling pipe connection joint of the battery pack gradually abut from the contact state to the sealed connection and open the flow channel.

[0015] Preferably, the battery pack is detachably connected to the bottom of the electric vehicle via a locking device, wherein the locking device comprises a locking mechanism having an L-shaped locking groove and a locking shaft fixed to the side of the battery pack. The locking shaft is vertically moved into position along the L-shaped locking groove and then further moved horizontally until the battery pack is successfully locked.

[0016] The mounting seat is provided with a moving component, and the moving component drives the connecting valve to move synchronously when the lock shaft moves horizontally along the L-shaped lock groove.

[0017] According to this solution, the battery pack is locked by moving vertically and then horizontally. When the battery pack rises into place, the liquid cooling pipe of the battery pack is sealed and connected with the liquid cooling pipe connection device of the electric vehicle. Therefore, when the battery pack moves horizontally, the liquid cooling connection device of the electric vehicle maintains synchronous movement with the battery pack through moving parts, ensuring the sealing and connectivity of the liquid cooling connection.

[0018] Preferably, a positioning component is provided on the mounting seat, and the connecting valve and the liquid cooling connecting device of the battery pack are positioned by the positioning component.

[0019] According to this solution, accurate and rapid docking between the connecting valve and the liquid-cooling connecting connector of the battery pack is achieved through the positioning component.

[0020] Preferably, the positioning component includes two positioning holes or two positioning columns respectively provided on both sides of the connecting valve.

[0021] Preferably, the mounting seat is provided with a sealing ring arranged around the connecting valve.

[0022] 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 connection 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.

[0023] Preferably, the connecting valve includes a housing in which the circulation channel is formed, and a valve core that is telescopically movable in the circulation channel to open and close the circulation channel.

[0024] 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.

[0025] 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.

[0026] Preferably, the valve core includes a core body extending from the first end to the second end, and a valve plug that is telescopically mounted on one 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 the telescopic movement of the valve plug.

[0027] 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.

[0028] 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 an area of ​​the shell that is higher than the end surface of the core.

[0029] 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 achieve more precise docking of the liquid-cooled connecting connector of the battery pack and the connecting valve, thereby improving the sealing connection efficiency.

[0030] Preferably, one end of the valve core is fixedly connected to the second end portion and the other end is telescopically connected to the second end portion in the circulation channel, and the valve core is sealed to the first end portion.

[0031] According to this solution, in the connecting valve housing, the flow channel is opened or closed by setting the valve core with one end sealed with 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.

[0032] The present invention also discloses a battery mounting portion, comprising the vertical docking type vehicle-end liquid cooling connection device described in any of the above solutions.

[0033] Preferably, the number of the vertical docking vehicle-end liquid cooling connection devices is two, one of which serves as the input part of the cooling liquid and the other serves as the output part of the cooling liquid.

[0034] Preferably, the two vertical docking vehicle-end liquid cooling connection devices are respectively arranged at opposite ends of the accommodating cavity of the electric vehicle.

[0035] According to this solution, the input and output parts of the liquid cooling connection device are set at both ends of the accommodating 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 space occupied by the liquid cooling pipeline and improving the heat exchange efficiency.

[0036] The present invention also discloses an electric vehicle, comprising the vertical docking vehicle-end liquid cooling connection device described in any of the above solutions, or the battery mounting portion described in any of the above solutions.

[0037] On the basis of conforming to the common sense in this field, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0038] The positive progressive effect of the present invention is that: during the process of installing the battery pack on the bottom of the electric vehicle, the present invention lifts the battery pack from the bottom to the top. When the battery pack is lifted up into place, the battery pack can be installed and at the same time, the connection valve of the electric vehicle and the liquid-cooling connection joint of the battery pack can be sealed and connected, ensuring the sealing and preventing leakage. The installation and connection process is simple and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 Schematic diagram of the structure of the liquid cooling connection assembly in Example 1 of the present invention;

[0040] Figure 2 Schematic diagram of the structure of the first liquid cooling connection device in Example 1 of the present invention;

[0041] Figure 3 Schematic diagram of the structure of the second liquid cooling connection device in Example 1 of the present invention;

[0042] Figure 4 This is a schematic diagram of an installation method in which the vertical docking type vehicle-end liquid cooling connection device in Example 2 of the present invention is installed on a battery mounting portion. DETAILED DESCRIPTION

[0043] The present invention will be described more clearly and completely below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments.

[0044] Example 1

[0045] like Figures 1 to 3 As shown, this embodiment 1 discloses a liquid cooling connection assembly 5000, which is used between a liquid supply device and a liquid cooling pipeline. The liquid cooling connection assembly 5000 is used to achieve communication between the liquid supply device and the liquid cooling pipeline, allowing the coolant in the liquid supply device to flow into the liquid cooling pipeline and flow back into the liquid supply device, thereby achieving heat exchange in the area where the liquid cooling pipeline is set.

[0046] 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 conjunction with each other. One of them is configured as a connection joint of the liquid supply device, and the other is configured as a connection joint of the liquid cooling pipeline. The liquid cooling connection assembly 5000 realizes a sealed connection while realizing the conduction of the liquid cooling pipeline, thereby allowing the coolant to circulate.

[0047] like Figure 1 and 2 As shown, the first liquid-cooling connection device 5100 includes a first mounting seat 5110 and a first connection valve 5120 .

[0048] like Figure 1 and 3 As shown, the second liquid-cooling connection device 5200 includes a second mounting seat 5210 and a second connection valve 5220 .

[0049] The first mounting seat 5110 is a planar plate-like structure, specifically a rectangular structure, and is used to mount and fix the first connecting valve 5120 .

[0050] The first connecting valve 5120 is fixed on the first mounting seat 5110 . An openable and closable flow channel is formed inside the first connecting valve 5120 . The flow direction of the flow channel is perpendicular to the plane direction of the first mounting seat 5110 .

[0051] The second mounting seat 5210 is a planar plate-like structure, specifically a rectangular structure, and is used to mount and fix the second connecting valve 5220 .

[0052] The second connecting valve 5220 is fixed on the second mounting seat 5210 . An openable and closable flow channel is formed inside the second connecting valve 5220 . The flow direction of the flow channel is perpendicular to the plane direction of the second mounting seat 5210 .

[0053] In actual use, one end of the first connecting valve 5120 is connected to the liquid cooling pipeline, and one end of the second connecting valve 5220 is connected to the liquid supply device. Through the coordinated connection of the first connecting valve 5120 and the second connecting valve 5220, the circulation channels in the first connecting valve 5120 and the second connecting valve 5220 are opened at the same time to enable the coolant in the liquid supply device to flow into the liquid cooling pipeline.

[0054] like Figure 2 As shown, the first connecting valve 5120 includes a first housing 5121 with a circulation channel formed therein and a first valve core 5122 that is telescopically movable in the circulation channel to open and close the circulation channel.

[0055] The first shell 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 a plurality of through holes are provided on the second end. A flow channel is formed between the open structure and the plurality of through holes.

[0056] The first valve core 5122 includes a first core body 5122a extending from the first end to the second end of the first shell 5121, and a valve plug 5122b that is telescopically movable and is mounted on the 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 shell 5121. The flow channel is opened or closed by the telescopic movement of the valve plug 5122b.

[0057] like Figure 3As shown, the second connecting valve 5220 includes a second housing 5221 with a circulation channel formed therein and a second valve core 5222 that is telescopically movable and arranged in the circulation channel to open and close the circulation channel.

[0058] The second shell 5221 is an aerial structure, and the outer diameter of the second shell 5221 matches the inner diameter of the first shell 5121. The second shell 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 multiple through holes. A flow channel is formed between the open structure and the multiple through holes.

[0059] One end of the second valve core 5222 is fixedly connected to the first end of the second shell 5221 and the other end is telescopically connected to the second end of the second shell 5221 in the circulation channel. The second valve core 5222 is sealed to the first end, and the corresponding circulation channel is opened or closed by the telescopic movement of the second valve core 5222.

[0060] Another example Figure 2 As shown, the first mounting seat 5110 is provided with a first positioning component 5130, as shown in FIG. Figure 3 As shown, the second mounting base 5210 is provided with a second positioning member 5230. When the first liquid-cooling connection device 5100 is connected to the second liquid-cooling connection device 5200, the first positioning member 5130 and the second positioning member 5230 are used for positioning, ensuring connection accuracy and improving connection efficiency. Specifically, the first positioning member 5130 can be configured as two positioning holes respectively provided on either side of the first connecting valve 5120, and the second positioning member 5230 can be configured as two positioning posts respectively provided on either side of the second connecting valve 5220. Alternatively, the first positioning member 5130 and the second positioning member 5230 can be configured in the opposite manner, or other positioning structures can be used to meet positioning requirements.

[0061] Another example Figure 2 As shown, the end face of the first core 5122a is recessed at a predetermined depth relative to the first end face of the first end portion, and a guide structure is provided in the area of ​​the first housing 5121 that is higher than the end face of the first core 5122a. The guide structure may be a guide slope, or, of course, any other structure having a guiding function. Thus, while the first positioning member 5130 and the second positioning member 5230 are positioned, the guide structure at the front end of the first core 5122a enables more precise docking of the second connecting valve 5220 with the first connecting valve 5120, thereby improving the sealing connection efficiency.

[0062] When the first connecting valve 5120 is connected to the second connecting valve 5220, the edge of the second shell 5221 pushes the valve plug 5122b of the first valve core 5122 to make the valve plug 5122b retract inward relative to the first core 5122a, and at the same time, the first core 5122a pushes the second valve core 5222 to make the second valve core 5222 retract toward the interior of the second shell 5221, so that the flow channels of the first shell 5121 and the second shell 5221 are opened at the same time, and since the second shell 5221 is inserted into the first shell 5121, the first shell 5121 and the second shell 5221 are sealed.

[0063] like Figure 3 As shown, the second mounting seat 521 is further provided with a sealing ring 5240 arranged around the second connecting valve 5220. After the first connecting valve 5120 and the second connecting valve 5220 are connected, the sealing ring 5240 is squeezed to maintain a sealed connection between the first mounting seat 5110 and the second mounting seat 5210, thereby ensuring the sealing of the first connecting valve 5120 and the second connecting valve 5220. In this way, even if a slight leakage occurs, it can be ensured that the liquid will not leak out and cause a threat or impact on other components in the use environment.

[0064] According to the liquid-cooling connection assembly 5000 of this embodiment 1, the mating connection of the first liquid-cooling connection device 5100 and the second liquid-cooling connection device 5200 ensures the openable and closable connectivity and sealing of the flow channel, thus preventing risks such as coolant leakage. The liquid-cooling connection assembly 5000 can be used in all environments where liquid cooling pipelines are connected, such as the pipeline connection between the battery pack and the liquid supply device of an electric vehicle.

[0065] In another embodiment, the sealing ring can also be set on the first mounting seat to achieve a sealed connection. It can be set arbitrarily according to actual needs.

[0066] Example 2

[0067] like Figure 4 As shown, this embodiment 2 discloses a battery mounting portion 7000, which is used in an electric vehicle to mount a battery pack 6000. The battery mounting portion 7000 includes the first liquid-cooling connection device 5100 or the second liquid-cooling connection device 5200 described in the above embodiment 1. The first liquid-cooling connection device 5100 or the second liquid-cooling connection device 5200 is provided on the battery mounting portion 7000 as a vertical docking vehicle-end liquid-cooling connection device. In this vertical docking vehicle-end liquid-cooling connection device, the first mounting seat 5110 and the second mounting seat 5210, as well as the first connecting valve 5120 and the second connecting valve 5220, are collectively referred to as the mounting seat and the connecting valve.

[0068] When the battery mounting portion 7000 is connected to the battery pack 6000, the vertical docking vehicle-end liquid cooling connection device and the battery-end liquid cooling connection device on the battery pack 6000 are in a sealed communication state, thereby allowing the coolant provided by the liquid supply device on the electric vehicle to be passed into the liquid cooling pipeline within the battery pack 6000, thereby facilitating heat exchange with the battery modules in the battery pack 6000 during the charging and discharging process, and providing a suitable operating temperature environment for the battery pack 6000. Here, the liquid cooling pipeline on the battery pack 6000 is connected to the second liquid cooling connection device 5200 or the first liquid cooling connection device 5100 that matches the vertical docking vehicle-end liquid cooling connection device on the electric vehicle. In other words, the first liquid cooling connection device 5100 or the second liquid cooling connection device 5200 is connected between the battery pack 6000 and the battery mounting portion of the electric vehicle, respectively, and the two can be arranged interchangeably.

[0069] Specifically, the mounting seat is arranged on the top surface or side surface of the electric vehicle accommodating cavity, and the connecting valve is fixed on the mounting seat. The planar direction of the mounting seat is parallel to the planar direction of the battery pack 6000, and the planar direction of the mounting seat is perpendicular to the flow direction of the flow channel of the connecting valve. That is, the flow direction of the flow channel is perpendicular to the planar direction of the length direction of the electric vehicle body, so that after the battery pack 6000 is installed in the electric vehicle from bottom to top, it is connected with the liquid cooling pipeline of the electric vehicle.

[0070] Here, the battery pack 6000 is removably connected to the bottom of the electric vehicle via a locking device. The locking device comprises a plurality of locking shafts fixed to both sides of the battery pack 6000 and a locking mechanism with a vertically extending locking slot mounted on the vehicle. When the battery pack 6000 is raised from the bottom of the electric vehicle until the locking shafts on the battery pack 6000 engage the locking slots of the locking device, the vertical docking vehicle-end liquid cooling connection of the electric vehicle connects with the battery-end liquid cooling connection on the battery pack 6000, opening the flow passage of the connection valve.

[0071] According to the battery installation portion of the second embodiment, in the process of installing the battery pack 6000 on the bottom of the electric vehicle, the battery pack 6000 is lifted from the bottom to the top. As the battery pack 6000 continues to rise, the vertical docking type vehicle-end liquid cooling connection device on the electric vehicle and the battery-end liquid cooling connection device of the battery pack 6000 gradually abut from the initial contact state to a sealed connection and open the flow channel; when the battery pack 6000 is lifted upward into place, the locking shaft is locked in the corresponding locking groove, and the vertical docking type vehicle-end liquid cooling connection device and the battery-end liquid cooling connection device are also sealed and connected at the same time, so that the sealed connection of the liquid cooling pipeline can be achieved while the battery pack 6000 is installed, and the installation and connection process is simple and efficient.

[0072] According to the solution of this embodiment 2, by fixing the mounting base in a horizontal manner relative to the electric vehicle and setting the flow direction of the flow channel of the connecting valve vertically to the mounting base, it is possible to achieve a rapid sealed connection between the connecting valve and the liquid-cooling connecting joint of the battery pack 6000 while the battery pack 6000 is lifted upward into place.

[0073] In another embodiment, the battery mounting portion 7000 has all the features of the aforementioned embodiments, and further includes a movable component on the mounting base. The movable component is used to drive the overall movement of the mounting base, and when the locking shaft moves horizontally along the L-shaped locking groove, it drives the overall synchronous movement of the mounting base and the connecting valve. This solution is based on the battery pack 6000 being removably connected to the bottom of the electric vehicle via a locking device. The locking device includes a locking mechanism with an L-shaped locking groove and a locking shaft fixed to the side of the battery pack 6000. The locking shaft moves vertically along the L-shaped locking groove into position and then moves horizontally until the battery pack 6000 is successfully locked. In other words, the battery pack 6000 is locked by moving vertically and then horizontally. When the battery pack 6000 is raised into position, the battery end liquid cooling connection device of the battery pack 6000 is sealed and connected to the vertical docking vehicle end liquid cooling connection device of the electric vehicle. Therefore, when the battery pack 6000 moves horizontally, the vertical docking vehicle-end liquid cooling connection device is driven to move as a whole by the moving parts so that the liquid cooling connection device of the battery pack 6000 maintains the same position as the liquid cooling connection device of the electric vehicle, thereby ensuring the sealing and connectivity of the liquid cooling connection.

[0074] In another embodiment, the battery mounting portion 7000 has all the features of the above-mentioned embodiments, and further has: the number of vertical docking type 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 arrangement of the liquid cooling optical path on the electric vehicle is made more flexible while also making the arrangement of the liquid cooling pipeline inside the battery pack 6000 more flexible. Preferably, the two vertical docking type vehicle-end liquid cooling connection devices are respectively arranged at opposite ends of the accommodating cavity of the electric vehicle. Arranging the input portion and the output portion of the liquid cooling connection device at both ends of the accommodating cavity of the electric vehicle can optimize the layout of the liquid cooling pipeline on the electric vehicle while also optimizing the layout of the liquid cooling pipeline inside the battery pack 6000, reducing the space occupied by the liquid cooling pipeline and improving the heat exchange efficiency.

[0075] In another embodiment, an electric vehicle is disclosed, which has all or part of the features of the vertical docking vehicle-end liquid cooling connection device or battery mounting portion shown in the above-mentioned embodiments 1 and 2.

[0076] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of the present invention.

Claims

1. A vertical docking vehicle-end liquid cooling connection device, used to connect to a battery pack to deliver coolant to the liquid cooling pipeline in the battery pack, characterized in that: include: A mounting seat, arranged in a receiving cavity at the bottom of the electric vehicle; as well as a connecting valve fixed to the mounting base, one end of the connecting valve being connected to the coolant supply device and the other end being used to connect to the battery pack; an openable and closable flow channel being formed inside the connecting valve, and a flow direction of the flow channel being perpendicular to the plane direction of the length direction of the electric vehicle body, so as to achieve communication with the liquid cooling pipeline of the electric vehicle after the battery pack is installed in the electric vehicle from the bottom up; The battery pack is detachably connected to the bottom of the electric vehicle via a locking device. The locking device comprises a locking mechanism having an L-shaped locking groove and a locking shaft fixed to the side of the battery pack. The locking shaft moves vertically along the L-shaped locking groove and then moves horizontally until the battery pack is successfully locked. The mounting seat is provided with a moving component, and the moving component drives the connecting valve to move synchronously when the lock shaft moves horizontally along the L-shaped lock groove; The mounting seat is arranged on the bottom surface or side surface of the accommodating cavity of the electric vehicle, and the plane direction of the mounting seat is parallel to the plane direction of the battery pack and perpendicular to the flow direction.

2. The vertical docking vehicle end liquid cooling connection device according to claim 1, characterized in that: The battery pack is detachably connected to the bottom of the electric vehicle via a locking device. When the battery pack rises from the bottom 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 connecting valve with the liquid cooling pipeline of the battery pack.

3. The vertical docking vehicle end liquid cooling connection device according to claim 1, characterized in that: The mounting seat is provided with a positioning component, through which the connecting valve and the liquid cooling connecting device of the battery pack are positioned.

4. The vertical docking type vehicle end liquid cooling connection device according to claim 3, characterized in that: The positioning component includes two positioning holes or two positioning columns respectively arranged on both sides of the connecting valve.

5. The vertical docking vehicle end liquid cooling connection device according to claim 1, characterized in that: The mounting seat is provided with a sealing ring arranged around the connecting valve.

6. The vertical docking vehicle end liquid cooling connection device according to claim 1, characterized in that: The connecting valve includes a housing in which the circulation channel is formed and a valve core that is telescopically movable in the circulation channel to open and close the circulation channel.

7. The vertical docking vehicle end liquid cooling connection device according to claim 6, characterized in that: 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. The flow channel is formed between the open structure and the plurality of through holes.

8. The vertical docking vehicle end liquid cooling connection device according to claim 7, characterized in that: The valve core includes a core body extending from the first end to the second end, and a valve plug that is telescopically mounted on one end of the core body corresponding to the first end and is used to seal the core body and the shell. The flow channel is opened or closed by the telescopic movement of the valve plug.

9. The vertical docking type vehicle end liquid cooling connection device according to claim 8, characterized in that: 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 an area of ​​the shell that is higher than the end surface of the core.

10. The vertical docking type vehicle end liquid cooling connection device according to claim 7, characterized in that: One end of the valve core is fixedly connected to the second end portion, and the other end is telescopically connected to the second end portion in the circulation channel. The valve core is sealed to the first end portion.

11. A battery installation portion, characterized in that: It comprises a vertical docking vehicle end liquid cooling connection device as described in any one of claims 1-10.

12. The battery mounting portion according to claim 11, wherein: There are two vertical docking vehicle end liquid cooling connection devices, one of which serves as the input part of the cooling liquid and the other serves as the output part of the cooling liquid.

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

14. An electric vehicle, characterized in that: It includes the vertical docking vehicle-end liquid cooling connection device as described in any one of claims 1-10; or the battery mounting portion as described in any one of claims 11-13.

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