Liquid-cooled connection device with floating function, battery pack and electric vehicle

Abstract

The present invention discloses a liquid-cooled connection device, a battery pack and an electric vehicle with a floating function. The liquid-cooled connection device includes: a mounting seat, which is arranged in a receiving cavity at the bottom of the electric vehicle or on the battery pack; and a connecting valve, which is fixed on the mounting seat, one end of the connecting valve is connected to a liquid supply device, and the other end is used to connect to a liquid cooling pipeline; the mounting seat includes a mounting plate fixed on the battery pack or in the receiving cavity at the bottom of the electric vehicle and a moving mechanism that can be telescopically moved along the flow direction of the flow channel relative to the mounting plate, and the connecting valve is fixed on the moving mechanism. The movement amount of the connecting valve is increased, and the movement of the connecting valve is more stable, which ensures the stability of the connection of the connecting valve, effectively avoids the leakage of the coolant, and greatly improves the installation stability of the liquid-cooled connection device. The connecting valve is moved with the movement of the connecting valve to solve the problem of unstable connection of the connecting valve caused by factors such as vehicle vibration.

Description

[0001] This application claims the priority of Chinese patent application No. 202010981928.8 filed on September 17, 2020. This application cites the entire text of the above patent application. Technical Field

[0002] The invention relates to a liquid cooling connection device with a floating function, a battery pack and an electric vehicle. Background Art

[0003] There are two main ways to obtain energy for electric vehicles: charging and battery replacement. Since battery replacement can achieve rapid energy replenishment, it reduces customers' waiting time and improves the utilization rate of battery replacement stations. In addition, batteries can be charged centrally at night to achieve "peak energy storage" of power load. At the same time, it improves the comprehensive utilization efficiency of power equipment and extends the service life of batteries, which has high promotion value and economic significance.

[0004] In battery-swap electric vehicles, replaceable battery packs are generally installed in a movable manner, and the battery packs can be removed and replaced with new ones at any time. The cooling pipes installed on the quick-change battery packs are connected to the cooling system on the electric vehicle, and the circulation of the coolant is used to achieve thermal balance of the quick-change battery packs. However, the cooling pipes on the quick-change battery packs are rigidly connected to the electric vehicle. Battery-swap electric vehicles need to frequently and automatically replace the quick-change battery packs. Due to frequent replacements, vehicle body vibrations and other influences, floating often occurs, resulting in unstable connections, which may cause disconnection and leakage of coolant. In addition, there are also some problems with the docking and positioning of current connectors, which are prone to problems such as misalignment of the connectors. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the defect in the prior art that the connection between the cooling tube on the battery pack and the socket on the electric vehicle is unstable, resulting in leakage of the coolant, and to provide a liquid cooling connection device, a battery pack and an electric vehicle with a floating function.

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

[0007] A liquid cooling connection device with a floating function, used to achieve the connection between a liquid supply device of a coolant provided on an electric vehicle and a liquid cooling pipeline in a battery pack, so as to pass the coolant into the liquid cooling pipeline in the battery pack, comprising:

[0008] A mounting seat is arranged in a receiving cavity at the bottom of the electric vehicle or on a battery pack; and

[0009] A connecting valve is fixed on the mounting seat, one end of the connecting valve is connected to the liquid supply device, and the other end is used to connect to the liquid cooling pipeline. An openable and closable flow channel is formed inside the connecting valve, and the flow direction of the flow channel is perpendicular or parallel to the plane direction of the length direction of the body of the electric vehicle, so as to achieve the connection between the liquid supply device and the liquid cooling pipeline after the battery pack is installed in the electric vehicle in a bottom-up direction or in a horizontal direction;

[0010] The mounting seat includes a mounting plate fixed on the battery pack or in the accommodating cavity at the bottom of the electric vehicle and a moving mechanism that can be telescopically moved along the flow direction of the flow channel relative to the mounting plate, and the connecting valve is fixed on the moving mechanism.

[0011] In this solution, the above-mentioned structural form is adopted, and the connecting valve is fixed on the moving mechanism. The moving mechanism can be telescopically moved relative to the mounting plate along the flow direction of the flow channel, which will drive the connecting valve to telescopically move along the flow direction of the flow channel, thereby increasing the movement of the connecting valve, ensuring the stability of the connection between the connecting valve and the liquid supply device and the liquid cooling pipeline, and improving the installation stability of the liquid cooling connection device. The connection valve is followed by the movement of the connecting valve to solve the problem of unstable connection of the connecting valve caused by factors such as vehicle vibration. At the same time, the connecting valve will telescopically move along the flow direction of the flow channel, and the movement is more stable, effectively avoiding the leakage of the coolant, and greatly improving the installation stability of the liquid cooling connection device.

[0012] Preferably, the mounting seat also includes a plurality of shafts with one end fixed to the mounting plate or the moving mechanism and the other end passing through the moving mechanism or the mounting plate, and a plurality of first elastic members which are correspondingly sleeved on the shafts and clamped between the mounting plate and the moving mechanism in a compressed state.

[0013] In this solution, the two ends of the first elastic member in the compressed state of the above-mentioned structure respectively apply a thrust force toward the mounting seat and the moving mechanism. When the moving mechanism is displaced, the first elastic member is compressed to achieve the telescopic movement of the moving mechanism relative to the mounting seat, and the moving mechanism can be restored under the action of the first elastic member. In addition, the multiple shafts all have a guiding function, and the shafts are used to make the moving mechanism move along a preset path to achieve precise connection of the connecting valve, and effectively avoid the displacement and dislocation of the moving mechanism during the movement, greatly improving the safety and stability of the liquid cooling connection device.

[0014] In addition, by arranging a plurality of first elastic members between the mounting plate and the moving mechanism, the moving mechanism can be quickly and stably restored to a non-initial state, thereby improving the safety and stability of the liquid cooling connection device.

[0015] Preferably, the plurality of shafts are evenly arranged at edge positions or end angle positions of the mounting plate or the moving mechanism.

[0016] In the present solution, the above-mentioned structural form is adopted, and multiple shafts are evenly arranged at the edge position or end angle position of the mounting plate or the moving mechanism to guide the moving mechanism to move along a preset path, thereby ensuring the consistency of the overall telescopic movement of the moving mechanism and preventing tilting, thereby achieving more stable movement of the moving mechanism; and the moving mechanism is evenly stressed, further improving the stability of the movement of the moving mechanism.

[0017] Preferably, the first elastic member is a compression spring.

[0018] In this solution, the above structural form is adopted, which has high stability, simple structure and low cost.

[0019] Preferably, a positioning component is provided on the mounting seat, and the connecting valve and the battery pack or the bottom of the electric vehicle are positioned by the positioning component.

[0020] In this solution, the above-mentioned structural form is adopted, and when the connecting valve is connected to the liquid supply device or the liquid cooling pipeline, it is positioned by the positioning component to ensure the accuracy of the connection and improve the connection efficiency.

[0021] Preferably, the movable mechanism includes a movable seat forming a cavity and a floating plate that can float in the cavity, the movable seat is telescopically connected to the mounting plate, the connecting valve is fixed on the floating plate, and the positioning component is positioned by the floating effect of the floating plate during the battery pack installation process.

[0022] In the present solution, the above-mentioned structural form is adopted, and the connecting valve is fixed on the floating plate. When the floating plate moves in the cavity, the connecting valve will be driven to move together, ensuring that the positioning components on the mounting plate can be quickly and accurately positioned during the installation of the battery pack, thereby improving the connection efficiency of the connecting valve; at the same time, it can also further increase the movement of the connecting valve, ensure the stability of the connection between the connecting valve and the liquid supply device and the liquid cooling pipeline, and improve the installation stability of the liquid cooling connecting device.

[0023] Preferably, the moving mechanism further comprises a plurality of second elastic members, and the plurality of second elastic members are respectively connected to the corresponding end angle positions of the moving seat through the end angle positions of the floating plate.

[0024] In this solution, the above-mentioned structural form is adopted, and the floating plate can move in the movable seat through multiple second elastic members. At the same time, the multiple second elastic members will act on the four sides of the floating plate respectively, ensuring the movement and rebound of the floating plate and improving the stability of the liquid cooling connection device.

[0025] Preferably, the second elastic member is a tension spring.

[0026] In this solution, the above structural form is adopted, which has high stability, simple structure and low cost.

[0027] Preferably, the moving mechanism further comprises a cover plate arranged at the opening side of the cavity and penetrated by the connecting valve, and a sealing sleeve sealed between the cover plate and the tube wall of the connecting valve, wherein the sealing sleeve has a preset expansion and contraction space.

[0028] In this solution, the above-mentioned structural form is adopted, and the sealing sleeve plays a sealing role. The sealing sleeve seals the opening between the cover plate and the pipe wall of the connecting valve, effectively preventing external dust, moisture, impurities, etc. from entering the cavity, greatly improving the installation stability of the liquid cooling connection device. At the same time, the sealing sleeve has a preset expansion space, so that the sealing sleeve can also expand and contract during the movement of the connecting valve, thereby ensuring the sealing effect.

[0029] Preferably, the sealing sleeve has a corrugated portion.

[0030] In this solution, the above-mentioned structural form is adopted, and the sealing sleeve is made elastic and retractable through the corrugated part, which is convenient to process and manufacture and has low cost.

[0031] Preferably, a moving component is provided on the mounting seat, and the moving component drives the connecting valve to move synchronously when the lock shaft on the battery pack moves horizontally along the L-shaped lock groove at the bottom of the electric vehicle.

[0032] In the present solution, the above-mentioned structural form is adopted. When the battery pack moves during the locking process, the connecting valve that seals the liquid cooling pipeline connecting the battery pack and the liquid supply device of the electric vehicle moves with the movement of the battery pack through the moving parts, and then maintains a relative position with the battery pack, thereby ensuring the accuracy, sealing and connectivity of the liquid cooling connection.

[0033] Preferably, the moving component is disposed on the floating plate to achieve movable connection of the connecting valve relative to the floating plate.

[0034] In this solution, the above-mentioned structural form is adopted, and the connecting valve has a certain amount of movement relative to the floating plate through the moving component, which further increases the movement of the connecting valve, ensures the stability of the connection between the connecting valve and the liquid supply device and the liquid cooling pipeline, and improves the installation stability of the liquid cooling connecting device. At the same time, the connecting valve is moved in a predetermined direction on the floating plate through the moving component, which ensures the accuracy of the connection and improves the connection efficiency.

[0035] Preferably, the mounting seat further comprises a fixing plate for fixing the connecting valve, and the moving component comprises a sliding block and a guide rail arranged between the fixing plate and the floating plate.

[0036] In this solution, the above-mentioned structural form is adopted, the connecting valve is fixed on the fixed plate, and then the slider and the guide rail are respectively connected to the fixed plate and the floating plate, so that the fixed plate moves on the floating plate, which has a simple structure, convenient installation and setting, and low cost. At the same time, the slider moves along the predetermined direction on the guide rail, effectively avoiding the offset and dislocation phenomenon of the fixed plate and the connecting valve during the movement, and ensuring the accuracy, sealing and connectivity of the liquid cooling connection.

[0037] A battery pack comprises the liquid cooling connection device with floating function as described above.

[0038] In this solution, the above-mentioned structural form is adopted, and the connecting valve is fixed on the moving mechanism and can be telescopically moved relative to the mounting plate along the flow direction of the flow channel, thereby increasing the movement of the connecting valve, and the movement of the connecting valve is more stable, ensuring the stability of the connection of the connecting valve, effectively avoiding the leakage of the coolant, and greatly improving the installation stability of the battery pack. At the same time, the connection valve follow-up method solves the problem of unstable connection of the connecting valve caused by factors such as vehicle vibration.

[0039] An electric vehicle comprises the liquid cooling connection device with floating function as described above.

[0040] In this solution, the above-mentioned structural form is adopted, and the connecting valve is fixed on the moving mechanism and can be telescopically moved relative to the mounting plate along the flow direction of the flow channel, thereby increasing the movement of the connecting valve, and the movement of the connecting valve is more stable, ensuring the stability of the connection of the connecting valve, effectively avoiding the leakage of the coolant, and greatly improving the installation stability of the electric vehicle. At the same time, the connection valve follow-up method solves the problem of unstable connection of the connecting valve caused by factors such as vehicle vibration.

[0041] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0042] The positive and progressive effect of the present invention is that the connecting valve is fixed on the moving mechanism, and the moving mechanism can be telescopically moved relative to the mounting plate along the flow direction of the flow channel, which will drive the connecting valve to move telescopically along the flow direction of the flow channel, thereby increasing the movement of the connecting valve, and the movement of the connecting valve is more stable, ensuring the stability of the connection of the connecting valve, effectively avoiding the leakage of the coolant, and greatly improving the installation stability of the liquid cooling connection device. At the same time, the connection valve follow-up method solves the problem of unstable connection of the connecting valve caused by factors such as vehicle vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1It is a schematic structural diagram of a liquid cooling connection assembly in Embodiment 1 of the present invention;

[0044] Figure 2 is a schematic structural diagram of a first liquid cooling connection device in Embodiment 1 of the present invention;

[0045] Figure 3 is a schematic structural diagram of a second liquid cooling connection device in Embodiment 1 of the present invention;

[0046] Figure 4 This is a schematic diagram of a first installation method of installing the battery terminal liquid cooling connection device in Embodiment 2 of the present invention on a battery pack;

[0047] Figure 5 This is a schematic diagram of a second installation method of installing the battery terminal liquid cooling connection device in Embodiment 3 of the present invention on a battery pack;

[0048] Figure 6 It is a schematic diagram of a first installation method of installing the vehicle-end liquid cooling connection device in Embodiment 4 of the present invention on a battery mounting portion;

[0049] Figure 7 It is a schematic diagram of a second installation method of installing the vehicle-end liquid cooling connection device in Embodiment 5 of the present invention on the battery mounting portion;

[0050] Figure 8 It is a schematic diagram of the three-dimensional structure of a liquid cooling connection device with a floating function according to Embodiment 6 of the present invention;

[0051] Fig. 9 It is a schematic diagram of the front view structure of a liquid cooling connection device with a floating function according to Embodiment 6 of the present invention;

[0052] Fig.10 It is a right side structural schematic diagram of a liquid cooling connection device with a floating function according to Embodiment 6 of the present invention;

[0053] Fig.11 This is a schematic diagram of the internal structure of a liquid-cooling connection device with a floating function according to Embodiment 6 of the present invention;

[0054] Fig.12 It is a partial structural schematic diagram of a liquid cooling connection device with a floating function according to Embodiment 6 of the present invention;

[0055] Fig.13 This is a partial structural schematic diagram from another perspective of a liquid-cooling connection device with a floating function according to Example 6 of the present invention. DETAILED DESCRIPTION

[0056] 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.

[0057] Example 1

[0058] 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, so that the coolant in the liquid supply device flows into the liquid cooling pipeline and flows back into the liquid supply device, thereby achieving heat exchange in the area where the liquid cooling pipeline is set.

[0059] 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 combination. One of them is configured as a connection joint of a liquid supply device, and the other is configured as a connection joint of a 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.

[0060] 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 .

[0061] 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 .

[0062] 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 .

[0063] 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 .

[0064] 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 .

[0065] 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 .

[0066] 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 between the first connecting valve 5120 and the second connecting valve 5220, the flow 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.

[0067] 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 which is telescopically movable and disposed in the circulation channel to open and close the circulation channel.

[0068] 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.

[0069] 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 which is telescopically mounted on an 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, and the flow channel is opened or closed by the telescopic movement of the valve plug 5122b.

[0070] like Figure 3 As shown, the second connecting valve 5220 includes a second housing 5221 with a circulation channel formed therein and a second valve core 5222 which is telescopically movable and arranged in the circulation channel to open and close the circulation channel.

[0071] 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 a plurality of through holes, and a flow channel is formed between the open structure and the plurality of through holes.

[0072] 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.

[0073] Another example Figure 2 As shown, the first mounting seat 5110 is provided with a first positioning member 5130. Figure 3As shown, the second mounting seat 5210 is provided with a second positioning component 5230. When the first liquid-cooling connection device 5100 is connected to the second liquid-cooling connection device 5200, the first positioning component 5130 and the second positioning component 5230 are used for positioning to ensure the accuracy of the connection and improve the connection efficiency. Specifically, the specific structural form of the first positioning component 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 component 5230 can be two positioning columns respectively arranged on both sides of the second connection valve 5220; the first positioning component 5130 and the second positioning component 5230 can also be arranged in the opposite manner, or other positioning structures can be used to meet the positioning requirements.

[0074] Another example Figure 2 As shown, the end face of the first core 5122a is recessed at a predetermined depth position of the first end face of the first end portion, and a guide structure is provided in the area of ​​the first shell 5121 that is higher than the end face of the first core 5122a. The guide structure can be a guide slope, or of course, any other structure with a guiding function, so that while the first positioning component 5130 and the second positioning component 5230 are positioned, the second connection valve 5220 can be more accurately docked with the first connection valve 5120 through the guide structure at the front end of the first core 5122a, thereby improving the sealing connection efficiency.

[0075] 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, thereby opening the flow channels of the first shell 5121 and the second shell 5221 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 sealedly connected.

[0076] like Figure 3 As shown, the second mounting seat 521 is also provided with a sealing ring 5240 arranged around the second connecting valve 5220. After the first connecting valve 5120 is connected to the second connecting valve 5220, 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.

[0077] According to the liquid cooling connection assembly 5000 of the present embodiment 1, the first liquid cooling connection device 5100 and the second liquid cooling connection device 5200 are matched and connected to ensure the openable and closable connectivity and sealing of the circulation channel, thereby avoiding the danger of cooling liquid dripping. The liquid cooling connection assembly 5000 can be used in all environments where liquid cooling pipelines are connected, such as pipelines between a battery pack of an electric vehicle and a liquid supply device on the vehicle, etc.

[0078] In another embodiment, the sealing ring may also be arranged on the first mounting seat, and a sealing connection may also be achieved, and it may be arbitrarily arranged according to actual needs.

[0079] Example 2

[0080] like Figure 4 As shown, this embodiment 2 discloses a battery pack 6000, which is used in an electric vehicle to provide power to the electric vehicle. The battery pack 6000 has a first liquid-cooling connection device 5100 or a second liquid-cooling connection device 5200 of the structure in the above embodiment 1, and the first liquid-cooling connection device 5100 or the second liquid-cooling connection device 5200 is arranged on the battery pack 6000 as a battery-end liquid-cooling connection device. In the battery-end liquid-cooling connection device, the first mounting seat 5110 and the second mounting seat 5210 and the first connecting valve 5120 and the second connecting valve 5220 are collectively referred to as mounting seats and connecting valves.

[0081] When the battery pack 6000 is installed on the electric vehicle, the battery end liquid cooling connection device is connected to the liquid supply device for providing cooling liquid on the electric vehicle, so that the cooling liquid is passed into the liquid cooling pipeline in the battery pack 6000, so as to facilitate heat exchange with the battery modules in the battery pack 6000 during the charging and discharging process, and provide a suitable working temperature environment for the battery pack 6000. Here, the liquid supply device on the electric vehicle is connected to the second liquid cooling connection device 5200 or the first liquid cooling connection device 5100 that matches the battery end liquid cooling connection device on the battery pack 6000 through the liquid cooling pipeline. 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 electric vehicle, respectively, and the two can be interchangeably arranged.

[0082] Specifically, the mounting seat is arranged on the top surface or side surface of the battery pack 6000, and the connecting valve is fixed on the mounting seat. The plane direction of the mounting seat is parallel to the plane direction of the battery pack 6000, and the plane direction of the mounting seat is perpendicular to the flow direction of the flow channel of the connecting valve, so that after the battery pack 6000 is installed in the electric vehicle from the bottom to the top, it can be connected with the liquid cooling pipeline of the electric vehicle. One end of the connecting valve located on the inner side of the battery pack 6000 is connected to the liquid cooling pipeline in the battery pack 6000, and the other end is used to connect to the liquid supply device. The liquid supply device here refers to the liquid supply device that provides cooling liquid in the electric vehicle or the liquid supply device set on the battery charging rack.

[0083] Here, the battery pack 6000 is detachably connected to the bottom of the electric vehicle through a locking device, and the locking device includes a plurality of locking shafts fixed on both sides of the battery pack 6000 and a locking mechanism provided on the vehicle and having a locking groove extending in a vertical direction. When the battery pack 6000 rises from the bottom of the electric vehicle until the locking shaft on the battery pack 6000 cooperates with the locking groove of the locking device, the liquid cooling connection device of the liquid supply device of the electric vehicle is sealed and connected with the battery terminal liquid cooling connection device on the battery pack 6000 and the flow channel of the connection valve is opened so as to communicate with each other.

[0084] According to the battery pack 6000 of the second embodiment, during 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, and as the battery pack 6000 continues to rise, the liquid cooling connection device on the liquid supply device of the electric vehicle and the corresponding connection valves of the liquid cooling connection device at the battery end 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, that is, the lock shaft is locked in the corresponding lock groove, the connection valve on the battery pack 6000 is also sealed and connected with the liquid supply device on the electric vehicle 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.

[0085] According to the solution of this embodiment 2, by fixing the mounting base in a horizontal manner relative to the battery pack 6000 and maintaining the flow direction of the flow channel of the connecting valve vertically arranged with respect to the mounting base, it is possible to achieve rapid sealing connection between the liquid cooling connection device and the liquid cooling pipeline of the electric vehicle while the battery pack 6000 is lifted upward into place.

[0086] In another embodiment, the battery pack 6000 has all the features of the above embodiments, and further includes a movable part on the mounting seat, and the connecting valve is movably arranged on the movable part, and when the locking shaft moves horizontally along the L-shaped locking groove, the connecting valve is driven to move in the opposite direction relative to the movable part. This scheme is based on the battery pack 6000 being detachably connected to the bottom of the electric vehicle through a locking device, and the locking device includes a locking mechanism with an L-shaped locking groove and a locking shaft fixed on the side of the battery pack 6000. After the locking shaft moves vertically along the L-shaped locking groove to a position, it further moves horizontally until the battery pack 6000 is successfully locked, that is, the battery pack 6000 is locked by further moving horizontally after moving vertically. When the battery pack 6000 rises to a position, the liquid cooling connection device of the battery pack 6000 is sealed and connected with the liquid cooling connection device of the electric vehicle. Therefore, when the battery pack 6000 moves horizontally, the liquid cooling connection device of the battery pack 6000 and the liquid cooling connection device of the electric vehicle are kept in place through the moving parts, that is, the connection valve of the battery pack 6000 moves in the opposite direction relative to the moving parts, thereby ensuring the accuracy, sealing and connectivity of the liquid cooling connection.

[0087] In another embodiment, the battery pack 6000 has all the features of the above-mentioned embodiments, and further has: the number of battery-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. By separately arranging the input part and the output part of the liquid cooling connection device, the liquid cooling pipeline arrangement method inside the battery pack 6000 is more flexible. Preferably, the two battery-end liquid cooling connection devices are respectively arranged at opposite ends of the battery pack 6000. Arranging the input part and the output part of the liquid cooling connection device at both ends of the battery pack 6000 can optimize the layout of the liquid cooling pipeline in the battery pack 6000, reduce the space occupied by the liquid cooling pipeline, and improve the heat exchange efficiency.

[0088] In another embodiment, the battery pack 6000 has all the features of the above embodiments and also has a battery-end electrical connector. The fixed side of the battery-end electrical connector is connected to the top or end of the battery pack body, and the ends are respectively adjacent to the two side surfaces. The battery-end electrical connector has all or part of the features of the battery-end electrical connector for battery replacement. In another embodiment, the battery-end liquid cooling connection device can also be set on the same fixed seat as the battery-end electrical connector.

[0089] In another embodiment, the battery pack 6000 has all the features of the above embodiments and further includes a battery hanging part, wherein the battery hanging part is installed on the top of the battery pack body, and the battery hanging part has all or part of the features of the first hanging part in the battery pack, or the battery hanging part has all or part of the features of the second hanging part in the battery pack.

[0090] In another embodiment, the battery pack 6000 has all the features of the above-mentioned embodiments, and also has a plurality of locking shafts 6200, which are axially and vertically connected to the opposite side surfaces of the battery pack body 6100, and the locking shafts 6200 are used to cooperate with the locking mechanism on the electric vehicle to lock the battery pack.

[0091] Example 3

[0092] like Figure 5 As shown, this embodiment 3 discloses another battery pack 6000, and the difference between this battery pack 6000 and the battery pack 6000 of embodiment 2 is only the setting position of the battery end liquid cooling connection device. The other structures and functions are exactly the same, and the same structures and functions will not be repeated.

[0093] In the battery terminal liquid cooling connection device on the battery pack 6000 of the present embodiment 3, the mounting seat is also arranged on the top surface or the side surface of the battery pack 6000, but the plane direction of the mounting seat is perpendicular to the plane direction of the battery pack 6000, and the plane direction of the mounting seat is perpendicular to the flow direction, that is, the flow direction of the flow channel is parallel to the plane direction of the battery pack 6000, so that after the battery pack 6000 is installed in the electric vehicle in a horizontal direction, it can be connected with the liquid cooling pipeline of the electric vehicle.

[0094] Here, the battery pack 6000 is detachably connected to the bottom of the electric vehicle through a locking device, and 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 from the bottom of the electric vehicle and further moved along the length direction of the body of the electric vehicle, that is, vertically and horizontally along the direction of the L-shaped locking groove, until the locking shaft on the battery pack 6000 cooperates with the locking groove of the locking mechanism, and the battery pack 6000 is locked successfully. When the battery pack 6000 is lifted vertically into place, the battery end liquid cooling connection device is aligned with the liquid supply device of the electric vehicle. As the battery pack 6000 moves horizontally, the connection device of the liquid cooling pipeline of the liquid supply device of the electric vehicle is connected to the connection valve on the battery pack 6000 and the flow channel of the connection valve is opened.

[0095] According to the battery pack 6000 of the third embodiment, in the process of installing the battery pack 6000 on the bottom of the electric vehicle, after the battery pack 6000 is lifted vertically into place, as the battery pack 6000 continues to move horizontally, the liquid cooling connection device on the liquid supply device of the electric vehicle and the connection valve of the battery pack 6000 gradually abut from the initial contact state to a sealed connection and open the flow channel, 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.

[0096] According to the solution of the third embodiment, by fixing the mounting base in a vertical manner relative to the battery pack 6000 and setting the flow direction of the flow channel of the connecting valve vertically to the mounting base, that is, the flow direction of the flow channel of the connecting valve is parallel to the horizontal direction of the battery pack 6000, it is possible to achieve a rapid sealed connection between the liquid cooling connection device and the liquid cooling pipeline of the electric vehicle while the battery pack 6000 is lifted upward into place.

[0097] In another embodiment, the battery pack 6000 has all the features of the above-mentioned embodiments, and further has: the number of battery-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. By separately arranging the input part and the output part of the liquid cooling connection device, the liquid cooling pipeline arrangement method inside the battery pack 6000 is more flexible. Preferably, the two battery-end liquid cooling connection devices are respectively arranged at opposite ends of the battery pack 6000. Arranging the input part and the output part of the liquid cooling connection device at both ends of the battery pack 6000 can optimize the layout of the liquid cooling pipeline in the battery pack 6000, reduce the space occupied by the liquid cooling pipeline, and improve the heat exchange efficiency.

[0098] In another embodiment, the battery pack 6000 has all the features of the above embodiments and also has a battery-end electrical connector. The fixed side of the battery-end electrical connector is connected to the top or end of the battery pack body, and the ends are respectively adjacent to the two side surfaces. The battery-end electrical connector has all or part of the features of the battery-end electrical connector for battery replacement. In another embodiment, the battery-end liquid cooling connection device can also be set on the same fixed seat as the battery-end electrical connector.

[0099] In another embodiment, the battery pack 6000 has all the features of the above embodiments and further includes a battery hanging part. The battery hanging part is installed on the top of the battery pack body, and the battery hanging part has all or part of the features of the first hanging part in the battery pack, or the battery hanging part has all or part of the features of the second hanging part in the battery pack shown in embodiment 7.

[0100] In another embodiment, the battery pack 6000 has all the features of the above-mentioned embodiments, and also has a plurality of locking shafts 6200, which are axially and vertically connected to the opposite side surfaces of the battery pack body 6100, and the locking shafts 6200 are used to cooperate with the locking mechanism on the electric vehicle to lock the battery pack.

[0101] Example 4

[0102] like Figure 6As shown, this embodiment 4 discloses a battery mounting portion 7000, which is used in an electric vehicle to mount a battery pack 6000 on the electric vehicle. The battery mounting portion 7000 has the first liquid cooling connection device 5100 or the second liquid cooling connection device 5200 described in the above embodiment 1, and the first liquid cooling connection device 5100 or the second liquid cooling connection device 5200 is arranged on the battery mounting portion 7000 as a vehicle-end liquid cooling connection device. In the vehicle-end liquid cooling connection device, the first mounting seat 5110 and the second mounting seat 5210 and the first connecting valve 5120 and the second connecting valve 5220 are collectively referred to as mounting seats and connecting valves.

[0103] When the battery mounting portion 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 communication state, so that the cooling liquid provided by the liquid supply device on the electric vehicle is passed into the liquid cooling pipeline in the battery pack 6000, so as to facilitate heat exchange with the battery modules in the battery pack 6000 during the charging and discharging process, and provide a suitable working 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 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 respectively connected between the battery pack 6000 and the battery mounting portion of the electric vehicle, and the two can be interchangeably arranged.

[0104] Specifically, the mounting seat is arranged on the top surface or side surface of the electric vehicle accommodating cavity, the connecting valve is fixed on the mounting seat, the plane direction of the mounting seat is parallel to the plane direction of the battery pack 6000, and the plane 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 plane direction of the length direction of the body of the electric vehicle, so that after the battery pack 6000 is installed in the electric vehicle in a bottom-up direction, it is connected with the liquid cooling pipeline of the electric vehicle.

[0105] Here, the battery pack 6000 is detachably connected to the bottom of the electric vehicle through a locking device, and the locking device includes a plurality of locking shafts fixed on both sides of the battery pack 6000 and a locking mechanism provided on the vehicle and having a locking groove extending in a vertical direction. When the battery pack 6000 rises from the bottom of the electric vehicle until the locking shaft on the battery pack 6000 cooperates with the locking groove of the locking device, 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.

[0106] According to the battery installation part of the fourth embodiment, in the process of installing the battery pack 6000 at the bottom of the electric vehicle, the battery pack 6000 is lifted from the bottom to the top, and as the battery pack 6000 continues to rise, the 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, that is, the locking shaft is locked in the corresponding locking groove, the vehicle-end liquid cooling connection device and the battery-end liquid cooling connection device are also sealed and connected at the same time, and 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.

[0107] According to the solution of the fourth embodiment, by fixing the mounting seat in a horizontal manner relative to the electric vehicle and keeping the flow direction of the flow channel of the connecting valve vertical to the mounting seat, it is possible to achieve a quick 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.

[0108] In another embodiment, the battery mounting part 7000 has all the features of the above embodiments, and further includes a moving part on the mounting seat, which is used to drive the mounting seat to move as a whole, and drives the mounting seat and the connecting valve to move synchronously as a whole when the locking shaft moves horizontally along the L-shaped locking groove. This solution is based on the battery pack 6000 being detachably connected to the bottom of the electric vehicle through a locking device, and the locking device includes a locking mechanism with an L-shaped locking groove and a locking shaft fixed on the side of the battery pack 6000. After the locking shaft moves vertically along the L-shaped locking groove to a position, it further moves horizontally until the battery pack 6000 is locked successfully, that is, the battery pack 6000 is locked by moving vertically and then horizontally. When the battery pack 6000 rises to its position, the battery end liquid cooling connection device of the battery pack 6000 is sealed and connected with the vehicle end liquid cooling connection device of the electric vehicle. Therefore, when the battery pack 6000 moves horizontally, the vehicle-end liquid cooling connection device is driven to move as a whole through 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.

[0109] In another embodiment, the battery mounting portion 7000 has all the features of the above-mentioned 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 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 accommodating cavity of the electric vehicle. The input portion and the output portion of the liquid cooling connection device are arranged at both ends of the accommodating cavity of the electric vehicle, which can optimize the layout of the liquid cooling pipeline on the electric vehicle while optimizing the layout of the liquid cooling pipeline in the battery pack 6000, reduce the space occupied by the liquid cooling pipeline, and improve the heat exchange efficiency.

[0110] In another embodiment, the battery mounting portion 7000 has all the features of the above embodiments and also has a vehicle-end electrical connector. The fixed side of the vehicle-end electrical connector is connected to the top or end of the battery accommodating cavity, and the ends are respectively adjacent to the two side surfaces. The vehicle-end electrical connector has all or part of the features of the vehicle-end electrical connector. In another embodiment, the vehicle-end liquid cooling connection device can also be arranged on the same mounting seat as the vehicle-end electrical connector.

[0111] In another embodiment, the battery mounting part 7000 has all the features of the above embodiments and further includes a battery mounting seat, wherein the battery mounting seat is mounted on the top of the battery accommodating cavity, and the battery mounting member has all or part of the features of the first mounting seat in the battery mounting part, or the battery mounting member has all or part of the features of the second mounting seat in the battery mounting part.

[0112] In another embodiment, the battery mounting portion 7000 has all the features of the above-mentioned embodiments, and further includes a locking mechanism 7100. The locking mechanism 7100 is arranged corresponding to the locking shafts on both sides of the battery pack 6000, and the battery pack 6000 is locked by locking the locking shafts.

[0113] Example 5

[0114] like Figure 7 As shown, this embodiment 5 discloses another battery mounting part 7000, and the difference between this battery mounting part 7000 and the battery mounting part 7000 of embodiment 4 is only that the setting position of the vehicle-end liquid cooling connection device is different, and the other structures and functions are exactly the same, and the same structures and functions will not be repeated.

[0115] The vehicle-end liquid cooling connection device on the battery mounting portion 7000 of this embodiment 5, the mounting seat is also arranged on the top surface or side surface of the electric vehicle accommodating cavity, but the plane direction of the mounting seat is perpendicular to the plane direction of the length direction of the vehicle body, and the plane direction of the mounting seat is perpendicular to the flow direction, that is, the flow direction of the flow channel is parallel to the plane direction of the battery pack 6000, so that after the battery pack 6000 is installed in the electric vehicle in a horizontal direction, it is connected with the liquid cooling pipeline of the electric vehicle.

[0116] Here, the battery pack 6000 is detachably connected to the bottom of the electric vehicle through a locking device, and 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 from the bottom of the electric vehicle into position and further moved along the length direction of the body of the electric vehicle, that is, vertically and horizontally along the direction of the L-shaped locking groove, until the locking shaft on the battery pack 6000 cooperates with the locking groove of the locking mechanism, and the battery pack 6000 is locked successfully. When the battery pack 6000 is lifted vertically into position, the vehicle-end liquid cooling connection device is aligned with the battery-end liquid cooling connection device. 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.

[0117] According to the battery pack 6000 of the present embodiment 5, during the process of installing the battery pack 6000 on the bottom of the electric vehicle, after the battery pack 6000 is lifted vertically into place, as the battery pack 6000 continues to move horizontally, the connection valve of the electric vehicle and the battery end liquid cooling connection device of the battery pack 6000 gradually abut against each other from the initial contact state to a sealed connection and open the flow channel, 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.

[0118] According to the solution of the present embodiment 5, by fixing the mounting base in a vertical manner relative to the electric vehicle and maintaining the flow direction of the flow channel of the connecting valve vertically to the mounting base, that is, maintaining the flow direction of the flow channel of the connecting valve parallel to the horizontal direction of the electric vehicle, it is possible to achieve rapid sealing connection between the battery end liquid cooling connection device and the vehicle end liquid cooling connection device of the electric vehicle while the battery pack 6000 is lifted upward into place.

[0119] In another embodiment, the battery mounting portion 7000 has all the features of the above embodiments and also has a vehicle-end electrical connector. The fixed side of the vehicle-end electrical connector is connected to the top or end of the battery accommodating cavity, and the ends are respectively adjacent to the two side surfaces. The vehicle-end electrical connector has all or part of the features of the vehicle-end electrical connector. In another embodiment, the vehicle-end liquid cooling connection device can also be arranged on the same mounting seat as the vehicle-end electrical connector.

[0120] In another embodiment, the battery mounting part 7000 has all the features of the above embodiment and further includes a battery mounting seat. The battery mounting seat is mounted on the top of the battery accommodating cavity, and the battery mounting part has all or part of the features of the first mounting seat in the battery mounting part 7000, or the battery mounting part has all or part of the features of the second mounting seat in the battery mounting part 7000.

[0121] In another embodiment, the battery mounting portion 7000 has all the features of the above-mentioned embodiments, and further includes a locking mechanism 7100. The locking mechanism 7100 is arranged corresponding to the locking shafts on both sides of the battery pack 6000, and the battery pack 6000 is locked by locking the locking shafts.

[0122] In another embodiment, an electric vehicle is disclosed, which has all or part of the features of the battery mounting parts shown in the above embodiments 1, 3, 4 and 5.

[0123] Example 6

[0124] like Figures 8 to 13 As shown, this embodiment 6 discloses a liquid cooling connection device with a floating function, which is used to achieve the connection between the liquid supply device of the cooling liquid provided on the electric vehicle and the liquid cooling pipeline in the battery pack, so as to pass the cooling liquid into the liquid cooling pipeline in the battery pack. Among them, the liquid cooling connection device with a floating function can be installed on the electric vehicle and connected with the liquid supply device on the electric vehicle. When connected with the liquid cooling pipeline of the battery pack, the cooling liquid provided by the liquid supply device flows into the liquid cooling pipeline of the battery pack through the liquid cooling connection device with a floating function, thereby achieving temperature regulation of the battery pack. In addition, the liquid cooling connection device with a floating function can also be installed on the battery pack and connected with the liquid cooling pipeline on the battery pack. When it is connected with the liquid supply device on the electric vehicle, the cooling liquid provided by the liquid supply device flows into the liquid cooling pipeline of the battery pack through the liquid cooling connection device with a floating function, thereby achieving temperature regulation of the battery pack.

[0125] The liquid cooling connection device with floating function includes a mounting seat 1 and a connecting valve 2, wherein the mounting seat 1 is arranged in a receiving cavity at the bottom of the electric vehicle or on the battery pack; the connecting valve 2 is fixed on the mounting seat 1, one end of the connecting valve 2 is connected to the liquid supply device, and the other end is used to connect to the liquid cooling pipeline, and a flow channel that can be opened and closed is formed inside the connecting valve 2, and the flow direction of the flow channel is perpendicular or parallel to the plane direction of the length direction of the body of the electric vehicle, so as to realize the connection between the liquid supply device and the liquid cooling pipeline after the battery pack is installed in the electric vehicle in a bottom-up direction or horizontal direction. The liquid supply device flows the provided cooling liquid into the connecting valve 2, and by opening the connecting valve 2, the cooling liquid flows into the liquid cooling pipeline, thereby realizing the cooling of the battery pack. In this embodiment 6, the number of connecting valves 2 is two, one connecting valve 2 is used for the entry of cooling liquid, and the other connecting valve 2 is used for the discharge of cooling liquid, so that the liquid cooling connection device can be circulated and cooled.

[0126] The mounting seat 1 includes a mounting plate 11 fixed on the battery pack or in the accommodating cavity at the bottom of the electric vehicle and a moving mechanism 12 that can be telescopically moved relative to the mounting plate 11 along the flow direction of the flow channel, and the connecting valve 2 is fixed on the moving mechanism 12. The connecting valve 2 is fixed on the moving mechanism 12, and the moving mechanism 12 can be telescopically moved relative to the mounting plate 11 along the flow direction of the flow channel, which will drive the connecting valve 2 to be telescopically moved along the flow direction of the flow channel, thereby increasing the movement of the connecting valve 2, ensuring the stability of the connection between the connecting valve 2 and the liquid supply device and the liquid cooling pipeline, improving the installation stability of the liquid cooling connection device, and solving the problem of unstable connection of the connecting valve caused by factors such as vehicle vibration by the following movement of the connecting valve 2. At the same time, the connecting valve 2 will telescopically move along the flow direction of the flow channel, and the movement is more stable, which effectively avoids the leakage of the coolant and greatly improves the installation stability of the liquid cooling connection device.

[0127] The mounting base 1 also includes a plurality of shafts 13, one end of which is fixed to the mounting plate 11 or the moving mechanism 12 and the other end of which passes through the moving mechanism 12 or the mounting plate 11, and a plurality of first elastic members 14, which are sleeved one by one on the shafts 13 and clamped between the mounting plate 11 and the moving mechanism 12 in a compressed state. The two ends of the first elastic members 14 in the compressed state respectively apply a thrust toward the mounting plate 11 and the moving mechanism 12. When the moving mechanism 12 is displaced, the first elastic member 14 is compressed to achieve the telescopic movement of the moving mechanism 12 relative to the mounting plate 11, and the moving mechanism 12 can be restored under the action of the first elastic member 14. In addition, the plurality of shafts 13 all have a guiding function, and the moving mechanism 12 is moved along a preset path through the shafts 13, so as to achieve the precise connection of the connecting valve 2, and effectively avoid the displacement and dislocation of the moving mechanism 12 during the movement, thereby greatly improving the safety and stability of the liquid cooling connection device. At the same time, by arranging a plurality of first elastic members 14 between the mounting plate 11 and the moving mechanism 12 , the moving mechanism 12 can be quickly and stably restored to a non-initial state, thereby improving the safety and stability of the liquid cooling connection device.

[0128] In the sixth embodiment, the shaft 13 is fixed to the mounting plate 11 , and the moving mechanism 12 has a plurality of guide holes, which correspond to the shafts 13 one by one, and the shafts 13 pass through the guide holes and move in the guide holes.

[0129] Multiple shafts 13 are evenly arranged at the edge or end angle of the mounting plate 11 or the moving mechanism 12. Multiple shafts 13 are evenly arranged at the edge or end angle of the mounting plate 11 or the moving mechanism 12 to guide the moving mechanism 12 to move along a preset path, ensuring the consistency of the overall telescopic movement of the moving mechanism 12, and preventing tilting, so that the movement of the moving mechanism 12 is more stable; and the moving mechanism 12 is evenly stressed, further improving the stability of the movement of the moving mechanism 12. In a specific embodiment, the number of shafts 13 is four, and the four shafts 13 are arranged at the four end angles of the moving mechanism 12.

[0130] In this embodiment 6, the first elastic member 14 is a compression spring. It has high stability, simple structure and low cost. The compression spring is sleeved on the shaft 13. It effectively avoids the displacement and dislocation of the compression spring during the compression process, and greatly improves the safety and stability of the liquid cooling connection device.

[0131] The mounting base 1 is provided with a positioning component 15, and the connecting valve 2 is positioned with the battery pack or the bottom of the electric vehicle by the positioning component 15. When the connecting valve 2 is connected to the liquid supply device or the liquid cooling pipeline, it is positioned by the positioning component 15 to ensure the accuracy of the connection and improve the connection efficiency. Specifically, the specific structural form of the positioning component 15 can be two positioning holes respectively arranged on both sides of the connecting valve 2, and the specific structural form of the positioning component 15 can also be two positioning columns respectively arranged on both sides of the connecting valve 2; other positioning structures can also be used to meet the positioning requirements.

[0132] The moving mechanism 12 includes a moving seat 121 with a cavity 1211 and a floating plate 122 that can float in the cavity 1211. The moving seat 121 is connected to the mounting plate 11 in a telescopic and movable manner. The connecting valve 2 is fixed on the floating plate 122. During the installation of the battery pack, the positioning component 15 is positioned by the floating effect of the floating plate 122. The connecting valve 2 is fixed on the floating plate 122. When the floating plate 122 moves in the cavity 1211, the connecting valve 2 will be driven to move together, ensuring that the positioning component 15 on the mounting plate 11 can be quickly and accurately positioned during the installation of the battery pack, thereby improving the connection efficiency of the connecting valve 2; at the same time, it can further increase the movement of the connecting valve 2, ensure the stability of the connection between the connecting valve 2 and the liquid supply device and the liquid cooling pipeline, and improve the installation stability of the liquid cooling connecting device.

[0133] The moving mechanism 12 also includes a plurality of second elastic members 123, and the plurality of second elastic members 123 are respectively connected to the corresponding end angle positions of the moving seat 121 by the end angle positions of the floating plate 122. By connecting the plurality of second elastic members 123 to the end angle positions of the floating plate 122, the floating plate 122 can be moved in the moving seat 121. At the same time, the plurality of second elastic members 123 will act on the four sides of the floating plate 122, respectively, to ensure the movement and rebound of the floating plate 122, and improve the stability of the liquid cooling connection device. Among them, the second elastic member 123 is a tension spring. It has high stability, simple structure and low cost.

[0134] The moving mechanism 12 also includes a cover plate 124 which is arranged on the opening side of the cavity 1211 and is penetrated by the connecting valve 2, and a sealing sleeve 125 which is sealed between the cover plate 124 and the tube wall of the connecting valve 2, and the sealing sleeve 125 has a preset telescopic space. The sealing sleeve 125 plays a sealing role. The opening between the cover plate 124 and the tube wall of the connecting valve 2 is sealed by the sealing sleeve 125, which effectively prevents external dust, moisture, impurities, etc. from entering the cavity 1211, greatly improving the installation stability of the liquid cooling connection device. At the same time, the sealing sleeve 125 has a preset telescopic space, so that the sealing sleeve 125 can also be telescoped during the movement of the connecting valve 2, thereby ensuring the sealing effect. Preferably, the sealing sleeve 125 has a corrugated portion. The corrugated portion is used to make the sealing sleeve 125 elastic and telescopic, which is convenient to process and manufacture and has low cost.

[0135] The mounting seat 1 is provided with a moving component 16, and the moving component 16 drives the connecting valve 2 to move synchronously when the locking shaft on the battery pack moves horizontally along the L-shaped locking groove at the bottom of the electric vehicle. The scheme is based on the battery pack 6 being detachably connected to the bottom of the electric vehicle through a locking device, and the locking device includes a locking mechanism with an L-shaped locking groove and a locking shaft fixed on the side of the battery pack. After the locking shaft moves vertically along the L-shaped locking groove to a position, it further moves horizontally until the battery pack is successfully locked, that is, the battery pack is locked by further horizontal movement after vertical movement. When the battery pack rises to a position, the liquid cooling pipeline of the battery pack is sealed and connected with the liquid supply device of the electric vehicle through a liquid cooling connection device with a floating function. Therefore, when the battery pack moves during the locking process, the connecting valve 2 of the liquid cooling pipeline of the battery pack and the liquid supply and liquid cooling connection device of the electric vehicle is moved with the movement of the battery pack through the moving component 16, and then keeps a relative position with the battery pack, thereby ensuring the accuracy, sealing and connectivity of the liquid cooling connection.

[0136] The moving component 16 is arranged on the floating plate 122 to realize the movable connection of the connecting valve 2 relative to the floating plate 122. The floating plate 122 moves in the cavity 1211, so that the connecting valve 2 can move relative to the moving seat 121 and realize the floating connection of the connecting valve 2; the moving component 16 makes the connecting valve 2 have a certain amount of movement relative to the floating plate 122, further increasing the movement of the connecting valve 2, ensuring the stability of the connection between the connecting valve 2 and the liquid supply device and the liquid cooling pipeline, and improving the installation stability of the liquid cooling connection device. At the same time, the connecting valve 2 is moved along a predetermined direction on the floating plate 122 by the moving component 16, ensuring the accuracy of the connection and improving the connection efficiency.

[0137] The mounting seat 1 also includes a fixed plate 17 for fixing the connecting valve 2, and the moving component 16 includes a slider 162 and a guide rail 161 arranged between the fixed plate 17 and the floating plate 122. The connecting valve 2 is fixed on the fixed plate 17, and then the slider 162 and the guide rail 161 are respectively connected to the fixed plate 17 and the floating plate 122, so that the fixed plate 17 can move on the floating plate 122, which has a simple structure, convenient installation and low cost. At the same time, the slider 162 moves along a predetermined direction on the guide rail 161, which effectively avoids the offset and misalignment of the fixed plate 17 and the connecting valve 2 during the movement, and ensures the accuracy, sealing and connectivity of the liquid cooling connection.

[0138] This embodiment also discloses a battery pack, which includes the above-mentioned liquid cooling connection device with floating function. One end of the connecting valve 2 of the liquid cooling connection device with floating function is connected to the liquid cooling pipeline in the battery pack and communicates with the liquid cooling pipeline, and the other end of the connecting valve 2 is detachably connected to the liquid supply device by plugging. The connecting valve 2 is fixed on the moving mechanism 12 and can be telescopically moved along the flow direction of the flow channel relative to the mounting plate 11, thereby increasing the movement of the connecting valve 2, and the movement of the connecting valve 2 is more stable, ensuring the stability of the connection of the connecting valve 2, effectively avoiding the leakage of the coolant, and greatly improving the installation stability of the battery pack.

[0139] This embodiment also discloses an electric vehicle, and the electric vehicle also includes the above-mentioned liquid cooling connection device with floating function. One end of the connecting valve 2 of the liquid cooling connection device with floating function is connected to the liquid supply device on the electric vehicle and communicates with the liquid supply device, and the other end of the connecting valve 2 is detachably connected to the liquid cooling pipeline in the battery pack by plugging. The connecting valve 2 is fixed on the moving mechanism 12 and can be telescopically moved along the flow direction of the flow channel relative to the mounting plate 11, thereby increasing the movement of the connecting valve 2, and the movement of the connecting valve 2 is more stable, ensuring the stability of the connection of the connecting valve 2, effectively avoiding the leakage of the coolant, and greatly improving the installation stability of the electric vehicle.

[0140] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection 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, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A liquid cooling connection device with a floating function, used to achieve the connection between the cooling liquid supply device provided on the electric vehicle and the liquid cooling pipeline in the battery pack, so as to pass the cooling liquid into 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 or on a battery pack; as well as A connecting valve is fixed on the mounting seat, one end of the connecting valve is connected to the liquid supply device, and the other end is used to connect to the liquid cooling pipeline. An openable and closable flow channel is formed inside the connecting valve, and the flow direction of the flow channel is perpendicular or parallel to the plane direction of the length direction of the body of the electric vehicle, so as to achieve the connection between the liquid supply device and the liquid cooling pipeline after the battery pack is installed in the electric vehicle in a bottom-up direction or in a horizontal direction; The mounting seat comprises a mounting plate fixed to the battery pack or the accommodating cavity at the bottom of the electric vehicle and a moving mechanism that can be telescopically moved along the flow direction of the flow channel relative to the mounting plate, and the connecting valve is fixedly arranged on the moving mechanism; The mounting seat is provided with a moving component, and the moving component is used to drive the mounting seat to move as a whole. When the lock shaft of the battery pack moves horizontally along the L-shaped lock groove at the bottom of the electric vehicle, the moving component drives the mounting seat and the connecting valve to move synchronously as a whole; Alternatively, a movable component is provided on the mounting seat, and the connecting valve is movably arranged on the movable component, and when the locking shaft of the battery pack moves horizontally along the L-shaped locking groove at the bottom of the electric vehicle, the connecting valve is driven to move relative to the movable component.

2. The liquid cooling connection device with floating function according to claim 1, characterized in that: The mounting seat also includes a plurality of shafts with one end fixed to the mounting plate or the moving mechanism and the other end passing through the moving mechanism or the mounting plate, and a plurality of first elastic members which are correspondingly sleeved on the shafts and clamped between the mounting plate and the moving mechanism in a compressed state.

3. The liquid cooling connection device with floating function as claimed in claim 2, characterized in that: The plurality of shafts are evenly arranged at edge positions or end angle positions of the mounting plate or the moving mechanism.

4. The liquid cooling connection device with floating function as claimed in claim 2, characterized in that: The first elastic member is a compression spring.

5. The liquid cooling connection device with floating function according to claim 1, characterized in that: The mounting seat is provided with a positioning component, through which the connecting valve and the battery pack or the bottom of the electric vehicle are positioned.

6. The liquid cooling connection device with floating function according to claim 5, characterized in that: The moving mechanism includes a moving seat with a cavity and a floating plate that can float in the cavity. The moving seat is telescopically connected to the mounting plate. The connecting valve is fixed on the floating plate. During the installation of the battery pack, the positioning component is positioned by the floating effect of the floating plate.

7. The liquid cooling connection device with floating function according to claim 6, characterized in that: The moving mechanism further comprises a plurality of second elastic members, and the plurality of second elastic members are respectively connected to the corresponding end angle positions of the moving seat through the end angle positions of the floating plate.

8. The liquid cooling connection device with floating function according to claim 7, characterized in that: The second elastic member is a tension spring.

9. The liquid cooling connection device with floating function according to claim 6, characterized in that: The moving mechanism further comprises a cover plate which is arranged at the opening side of the cavity and penetrated by the connecting valve, and a sealing sleeve which is sealed between the cover plate and the pipe wall of the connecting valve, wherein the sealing sleeve has a preset expansion and contraction space.

10. The liquid cooling connection device with floating function according to claim 9, characterized in that: The sealing sleeve has a bellows portion.

11. The liquid cooling connection device with floating function according to claim 6, characterized in that: The moving component is arranged on the floating plate to realize the moving connection of the connecting valve relative to the floating plate.

12. The liquid cooling connection device with floating function according to claim 11, characterized in that: The mounting seat further comprises a fixing plate for fixing the connecting valve, and the moving component comprises a sliding block and a guide rail arranged between the fixing plate and the floating plate.

13. A battery pack, characterized in that: It comprises a liquid cooling connection device with a floating function as claimed in any one of claims 1 to 12.

14. An electric vehicle, characterized in that: It comprises a liquid cooling connection device with a floating function as claimed in any one of claims 1 to 12.

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